Some standard content:
National Standard of the People's Republic of China
Medical hyperbaric oxygen chamber1 Subject content and scope of application
GB12130-1995
Replaces GB12130---89
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of medical hyperbaric oxygen chambers (hereinafter referred to as oxygen chambers).
This standard applies to air-pressurized hyperbaric oxygen therapy chambers, surgical rescue chambers and transition chambers with a maximum working pressure of no more than 0.3MPa. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB150-89 Steel pressure vessels
GB191-90 Pictorial symbols for packaging, storage and transportation
GB7134--86 Casting type industrial organic glass sheets, bars and pipesGB9706.1-1995 Medical electrical equipment Part 1: General safety requirementsGB12243-89 Spring direct load safety valveJB4730-94 Non-destructive testing of pressure vessels "Regulations on Safety and Technical Supervision of Pressure Vessels" (1990) of the Ministry of Labor (hereinafter referred to as "Regulations")3 Terms
3. 1 Treatment compartment Treatment compartment Equipment for patients to breathe oxygen through masks in a closed compartment with a pressure higher than atmospheric pressure. 3.2 Operation and rescue compartment Operation and rescue compartment Equipment for patients to undergo surgery or rescue by breathing oxygen in a closed compartment with a pressure higher than atmospheric pressure. 3.3 Transfer compartment Equipment that enables medical staff or patients to enter and exit the treatment compartment or operation and rescue compartment at the same pressure when the pressure is higher than atmospheric pressure. 3.4 Medical lock
A device used to deliver medical items in and out of the treatment cabin or surgical emergency chamber when the pressure is higher than the atmospheric pressure. 3.5 Air tightness of compartment The leakage rate of the compartment under different air pressures after the oxygen chamber is assembled. 3.6 Resistance of mask breathing system 3.6.1 Oxygen inlet resistance The total resistance generated by the negative pressure valve of the mask, the oxygen supply pipeline and accessories when the oxygen is supplied at the rated pressure and flow rate. 3.6.2 Exhalation resistance The total resistance generated by the positive pressure valve of the mask, the oxygen exhaust pipeline and accessories when the oxygen exhaust system is in the rated working state. Approved by the State Administration of Technical Supervision on December 8, 1995 and implemented on August 1, 1996
GB12130—1995
3.7 Oxygen concentration in compartment The volume percentage of oxygen in the cabin to the total gas in the cabin. 3.8 Oxygen supplying pressure The oxygen pressure setting value of the oxygen source after decompression and input to the oxygen chamber control console. 3.9 Illumination in compartment The luminous flux received per unit area at a specified position in the cabin when there is no natural light in the cabin and the power supply voltage is the rated value. 3.10 Non-homogeneity of illumination in compartment The relative value of the maximum difference of illumination at each point measured under the same test conditions. 4 Product classification
The classification of oxygen chambers shall be in accordance with the provisions of Table 1.
Multi-person oxygen chamber
Single-person oxygen chamber
Double-person oxygen chamber
Small-person oxygen chamber
Note: ① The number of patients in the medium-sized oxygen chamber refers to the number of patients in the treatment chamber. Treatment
② If the shell of the oxygen chamber is elliptical, the category shall be divided by $-(major axis + minor axis)/2. 5 Technical requirements
Medium oxygen chamber
Large oxygen chamber
5.1 The oxygen chamber shall comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. The design and calculation of pressure-bearing components with special structures shall be carried out in accordance with Article 34 of the "Container Regulations". 5.2 Cabin
The cabin is mainly composed of the shell, transfer tube, hatch, observation window, safety valve, etc. 5.2.1 Shell
5.2.1.1 The design, manufacture and inspection of the shell structure shall comply with the relevant provisions of the "Container Regulations" and GB150, and a quality certificate shall be provided in accordance with the requirements of Annex III (1~11) of the "Container Regulations".
5.2.1.2 The selection of shell materials shall comply with the relevant provisions of Chapter 2 of the "Container Regulations". 5.2.1.3 The butt welds of the shell butt joints shall be subjected to 100% radiographic inspection, and the inspection results shall comply with the grade requirements in JB4730. The fillet welds between the large opening door frame and the shell should be subjected to surface penetration testing, and the testing results should meet the requirements of Class I in JB4730. 5.2.2 Delivery tube
5.2.2.1 Large and medium-sized oxygen chambers must be equipped with a delivery tube with an inner diameter of not less than 300mm. Small oxygen chambers must be equipped with a delivery tube with an inner diameter of not less than 200mm. The delivery tube must be equipped with a pressure gauge, and there should be a clear gap between the starting scale (0 position) and the first scale line (should not be greater than 0.02MPa) of the pressure gauge.
5.2.2.2 The quick-opening outward-opening door of the delivery tube must have a connecting valve and a safety interlock device. Its locking pressure should not be greater than 0.02MPa, and the reset pressure should not be greater than 0.01MPa.
5.2.3 Cabin door
5.2.3.1 The light-transmitting width of the rectangular door should not be less than 650mm. The diameter of the circular door shall not be less than 750mm. 5.2.3.2 The outward opening door shall be equipped with a connecting valve and a safety interlocking device. When a pressure interlocking device is used, its locking pressure shall not be greater than 0.02MPa, and the reset pressure shall not be greater than 0.01MPa.
GB 12130—1995
5.2.3.3 Outward opening doors with electric or pneumatic drive must be equipped with a manual operating mechanism. The time for manual door opening shall not exceed 60s.
5.2.4 Observation window
5.2.4.1 The light-transmitting diameter of the observation window of the single and double oxygen chambers shall not be less than 140mm, and that of the multi-person oxygen chamber shall not be less than 150mm. The number of observation windows of the oxygen chamber shall be sufficient to allow personnel outside the chamber to observe the treatment status of each patient in the chamber. 5.2.4.2 The light-transmitting material of the observation window shall be industrial plexiglass. The scratches, silver streaks and other defects of translucent materials shall comply with the provisions of the first-class products in Table 8 of Article 2.2 of GB7134-86.
5.2.5 Safety valve
5.2.5.1 The set pressure deviation of the safety valve shall comply with the provisions of Table 2. Table 2
Set pressure deviation of cabin safety valve
Set pressure deviation of supporting pressure vessel safety valve Note: The set pressure is: Pw+0.02, Pw is the maximum working pressure, MPa. 5.2.5.2 The opening and closing pressure difference of the safety valve shall comply with the provisions of Table 3. Table 3
Set pressure
According to the provisions of GB12243
Opening and closing pressure difference
≤15% set pressure
5.2.6 The materials of the cabin decorative panels, floors, seats, beds, cabinets and paints must be non-combustible or flame-retardant materials. 5.2.7 Large and medium oxygen chambers should be equipped with transition chambers. 5.2.8 The per capita chamber capacity should comply with the provisions of Table 4. Table 4
Per capita chamber capacity
Single and double oxygen chambers
Small oxygen chambers
5.2.9 The airtightness of the oxygen chamber and pipelines should comply with the provisions of Table 5. Table 5
Test locationwwW.bzxz.Net
Gas supply system pipelines connected to gas storage tanks
Gas supply system pipelines not connected to gas storage
High-pressure pipelines of oxygen supply system
Test pressure
Maximum working pressure of the pipeline system
Maximum working pressure of the pipeline system
Medium-sized oxygen chamber
Large oxygen chamber
Leakage rate
Test location
Low-pressure pipelines of oxygen supply system
Air tightness of cabin
12130-1995
ContinuedTable 5
Test pressure
Maximum working pressure of the pipeline system
Maximum working pressure of cabin
Note: The air tightness of cabins with outward-opening doors is only tested for the maximum working pressure of the cabin. 5.2.Low-toxic and high-efficiency fire extinguishers should be installed in the oxygen chamber for more than 10 people, and a conspicuous "fire extinguishing" mark should be attached. 5.3 Air supply system
Leakage rate
5.3.1 The air inlet of the air compressor should be away from various pollution sources, and the air supply system should be equipped with an air purification device. The purification index of compressed air should comply with the provisions of Table 6.
Carbon dioxide
5.3.2 Pressure gauge configuration requirements
Carbon monoxide
≤0.001%
Hydrocarbons
(Oil vapor and liquid and solid particles of oil) ≤5 mg/m2
Two pressure gauges indicating the pressure in the cabin should be installed on the control console. The range of the pressure gauge is twice the maximum working pressure in the cabin. The range of the two instruments should be consistent, with an accuracy of 0.4 and not less than 1.5 respectively. The range of the pressure gauge of the air supply system should be 1.5~3.0 times the maximum working pressure, and the accuracy should not be less than Class 1.5.
5.3.3 Each cabin must be equipped with no less than two spring-loaded safety valves. Transition cabins not used for treatment should be equipped with at least one spring-loaded safety valve. The exhaust volume of all safety valves should not be less than the specified intake volume of the oxygen cabin. After the safety valve is adjusted to the specified pressure, it should be sealed with lead. The installation of cabin and gas tank safety valves should comply with Article 133 of the "Container Regulations". 5.3.4 Two groups of gas tanks should be set for large and medium-sized oxygen cabins. Each group of gas tanks should meet the capacity requirements of all cabins pressurized once and transition cabins re-pressurized. When an oil-free compressor is used, a group of compressed air at its outlet temperature does not exceed 37°C. The gas tanks configured for small oxygen cabins must meet the gas supply capacity requirements for cabin pressurization twice. 5.3.5 The doors with locking mechanisms between the transition cabin and the treatment cabin and the surgical rescue cabin shall be equipped with connecting valves for balancing the cabin pressure, and their diameter shall not be less than 10 mm.
5.3.6 Mechanical quick-opening emergency exhaust valves shall be installed inside and outside the cabin and marked in red. Single and double oxygen chambers are allowed to be installed only outside the cabin. The emergency exhaust valve outside the cabin shall be installed near the control console. During emergency decompression, the time for the oxygen chamber to drop from the maximum working pressure to 0.01MPa shall comply with the provisions of Table 7.
Pressure-proof time
Single and double oxygen chambers
Small oxygen chambers
Medium oxygen chambers
Large oxygen chambers
5.3.7 For oxygen chambers equipped with pneumatic or electric regulating valves for remote control and automatic control, a manually operated mechanical valve shall also be provided on the front of the control console as a backup.
5.3.8 The noise level in the cabin when only air is supplied shall not exceed 65dB (A). 112
GB12130--1995
5.3.9 The rate of cabin pressure increase and decrease shall comply with the provisions of Table 8. Table 8
Cabin pressure increase and decrease rate
Wj max
Note: 2ua min
Minimum pressure increase rate;
Maximum pressure increase rate;
s max -- -
5.4 Oxygen supply system
Minimum pressure reduction rate;
Maximum pressure reduction rate.
Treatment cabin, surgical rescue cabin
Transition cabin
MPa/min
5.4.1 The oxygen supply system shall consist of bottled oxygen, liquid oxygen tank or other oxygen source that can stably supply oxygen, indicating instruments and control valves. Multi-person oxygen cabins using bottled oxygen shall be equipped with oxygen confluence devices. The control console of multi-person oxygen chambers shall be equipped with oxygen source pressure gauges and oxygen supply pressure gauges, with an accuracy of not less than 1.5. The control console of single-person and double-person oxygen chambers shall be equipped with oxygen supply pressure gauges, with an accuracy of not less than 1.5. The high-pressure control valve of the oxygen supply system must be of the progressive opening type.
5.4.2 For oxygen chambers with emergency oxygen masks, corresponding oxygen flow meters shall be configured on the control console. For oxygen chambers with ordinary oxygen masks, a dynamic oxygen display device shall be provided for each patient on the control console. When the exhaust oxygen pipe in the cabin is not connected to the cabin air pressure, an isolation valve shall be respectively installed at the connection between each oxygen mask and the oxygen supply and exhaust oxygen pipelines; when the exhaust oxygen pipe in the cabin is connected to the cabin air pressure, an isolation valve shall be installed at the connection between each oxygen mask and the oxygen supply pipeline. 5.4.3 The materials of the oxygen supply and exhaust pipelines shall be copper tubes or anti-oxidation stainless steel tubes. Oxygen hoses can also be used for single-person and double-person oxygen chambers. Control or conversion valves shall be made of copper or anti-oxidation stainless steel. Pipe sealing gaskets must be made of copper or polytetrafluoroethylene. 5.4.4 After the oxygen source is decompressed, the oxygen supply pressure in the cabin should be 0.4MPa higher than the working cabin pressure. When all patients are breathing oxygen at the same time, the swing of the oxygen supply pressure gauge pointer should not exceed 0.1MPa. 5.4.5 The console must be equipped with at least one oxygen meter and a set of oxygen recorder. The indication error of the oxygen meter should not exceed 3%. 5.4.6 The oxygen meter should have two sampling ports, connected to the cabin and calibration gas respectively. The cabin sampling port should be located in the middle of the cabin, and its outlet should extend out of the decorative panel. The sampling pipeline is connected to the oxygen flow meter (flow limit: 1~5L/min) equipped with the oxygen meter by a tee, and the tee controller is installed on the console.
5.4.7 When the oxygen concentration exceeds the limit, an audible and visual alarm should be issued at the same time. The alarm error of the oxygen meter should not exceed 1%. 5.4.8 The oxygen concentration value in the cabin should not exceed 25%. 5.4.9 The resistance to oxygen inhalation shall not be less than 400Pa, and the resistance to exhalation shall not be greater than 300Pa. 5.4.10 The waste oxygen exhaled by the patient shall be controlled by an anti-oxidation valve or an oxygen flow meter. The waste oxygen exhaust pipeline shall be connected to the outdoors, and the waste oxygen exhaust port shall be more than 3m above the ground.
5.5 Air conditioning system
5.5.1 The control console must be equipped with a cabin temperature monitoring instrument, and the error of the temperature meter indication value shall not exceed 2℃. The temperature sensor shall be placed in the middle of the cabin, exposed outside the decorative panel, and equipped with a protective cover. 5.5.2 The treatment cabin and the surgical rescue cabin shall be equipped with a separate air conditioning system. The cabin temperature value shall comply with the provisions of Table 9. The noise of the cabin instrument when the air conditioning is turned on shall not exceed 60dB(A).
Cabin temperature
GB 121301995
(24～28)±2
(18～22)±2
5.5.3 Under the highest working pressure of the oxygen chamber, the air conditioning motor in the chamber must meet the following requirements: it can be started at 90% of the rated voltage; it cannot be overloaded at 110% of the rated voltage. The air conditioning motor in the chamber must be equipped with corresponding short-circuit and overload protection devices. The protection device should be able to operate correctly. 5.5.4 Electric heating equipment with open flames is prohibited in the air conditioning system. The air conditioning control part should be installed on the console. 5.6 Electrical system
5.6.1 Oxygen chamber lighting
5.6.1.1 Cold light source should be used for oxygen chamber lighting. Single, double and small oxygen chambers must use external lighting. The illumination in the chamber should comply with the provisions of Table 10. Table 10
Treatment cabin, transition cabin
Surgical dressing cabin
Note: ①E—·Average illumination value in the cabin.
②E Illumination value of surgical shadowless lamp.
③Illumination unevenness of single oxygen chamber is not assessed. Illumination value in the cabin
E≥60
E.≥2000
Illumination unevenness
5.6.1.2 Oxygen chamber must be equipped with emergency lighting system. When the power supply of oxygen chamber is interrupted, the emergency lighting system must be automatically activated. The duration of emergency lighting in the cabin should not be less than 30 minutes.
5.6.2 A single-channel (single, double and small oxygen chambers) or multi-channel intercom device with a backup power supply dual channel and an emergency sound and light alarm system in the cabin without electrical contacts should be configured between the oxygen chamber control console and each cabin. The emergency power supply should be automatically activated when the power supply is interrupted. 5.6.3 The cabin body and the grounding device must be reliably connected with galvanized flat (round) iron. The connection point should be paint-free and rust-proof. Single and double oxygen chambers should be marked with a grounding symbol "". The grounding resistance value of the oxygen chamber grounding device should not be greater than 4α. 5.6.4 The power input terminal of the oxygen chamber and the cabin body should be able to withstand a 50Hz, 1500V sine wave test voltage for 1 minute without flashover and breakdown. The corresponding feeder isolation transformer can also be configured. 5.6.5 If the oxygen chamber is equipped with a bioelectric socket, the insulation resistance between the pins (binding posts) of the bioelectric socket should not be less than 100MQ, and the insulation resistance of each pin (binding post) to the cabin body should not be less than 50MQ. 5.6.6 The ground leakage current is ≤5mA in normal state and ≤10mA in single fault state. 5.6.7 For oxygen chambers that do not use power soft cables or soft wires, the impedance between the protective grounding terminal and any other part connected to the terminal for protection purposes shall not exceed 0.12. For oxygen chambers using power flexible cables or wires, the impedance between the protective grounding pin of the mains plug and any other part connected to this point for protection purposes shall not exceed 0.22. 5.6.8 The voltage entering the single and double oxygen chambers shall not be higher than 24V. 5.6.9 Components and devices that can generate sparks must be moved outside the chamber. The wires entering the chamber must be equipped with metal protective tubes. The wiring inside the chamber must be reliably welded and wrapped with insulating materials.
5.7 The instruction manual of oxygen chamber products must include at least the following contents: a.
The composition and technical parameters of the main system;
Operation procedures;
Precautions, especially those related to operational safety. For example, the correct use of the oxygen meter and the correct control of the oxygen concentration in the chamber;
GB 12130-1995
d. Maintenance and care, especially maintenance and care to prevent safety accidents. For example, methods for regularly checking the normal operation of the oxygen meter are proposed. 6 Test methods
6.1 Shell inspection
Inspect the relevant certification materials of the pressure vessel. The results should comply with the provisions of Article 5.2.1. 6.2 Inspection of the delivery tube
6.2.1 Inner diameter of the delivery tube and pressure gauge
Measure the inner diameter of the delivery tube with a universal measuring tool, and check that the pressure gauge on the delivery tube should comply with the provisions of Article 5.2.2.1. 6.2.2 Interlocking device for delivery tube
Open the inner door of delivery tube, close the hatch door and the outer door of delivery tube, so that the cabin pressure rises to the point where the delivery tube interlocking device is locked (locking pressure), and then the cabin pressure is reduced to the point where the delivery tube interlocking device is reset (reset pressure). The result shall comply with the provisions of 5.2.2.2. 6.3 Hatch door
6.3.1 Hatch door dimensions
Use a general measuring tool to measure the hatch door dimensions, and the result shall comply with the provisions of 5.2.3.1. 6.3.2 Pressure interlocking device for external door
Close the hatch door and the delivery tube door, so that the cabin pressure rises to the point where the pressure interlocking device is locked (locking pressure), and then the cabin pressure is reduced to the point where the pressure interlocking device is reset (reset pressure). The result shall comply with the provisions of 5.2.3.2. 6.3.3 Manual door opening time
Use a stopwatch to record the time for manual door opening, and the result shall comply with the provisions of 5.2.3.3. 6.4 Inspection of observation window
6.4.1 Dimensions of observation window
Measure the dimensions of observation window with general measuring tools, which shall comply with the provisions of 5.2.4.1. 6.4.2 Translucent material
Inspect the product certificate of the material manufacturer. In a room with sufficient natural light, inspect by visual method at a distance of 300-400mm from the translucent glass. Silver streak inspection can also be carried out with the aid of a magnifying glass with a magnification of ≥5. The result shall comply with the provisions of 5.2.4.2. 6.5 Safety valve performance inspection
6.5.1 Performance test of cabin safety valve
The oxygen chamber is pressurized to the set pressure of the safety valve at a rate of 0.01.MPa/min. The safety valve shall open within the allowable range of the deviation of the set pressure of the safety valve; the oxygen chamber is reduced to the allowable range of the opening and closing pressure difference at a rate of 0.01MPa/min, and the safety valve shall return to its seat. The set pressure deviation and opening and closing pressure difference of the tested safety valve shall comply with the provisions in Table 2 and Table 3 respectively. 6.5.2 Performance test of safety valve of matching pressure vessel Check the safety valve quality certificate provided by the manufacturer. It shall comply with the provisions in Table 2 and Table 3 respectively. 6.6 Safety performance inspection of non-combustible and flame-retardant materials Check the product certificate or approval certificate of the material manufacturer. Its safety performance shall comply with the provisions of Article 5.2.6. 6.7 Inspection of transition tank
For inspection of large and medium-sized oxygen chambers, the results shall comply with the provisions of Article 5.2.7. 6.8 Inspection of per capita cabin capacity
The per capita cabin capacity of each type of oxygen chamber is calculated according to formula (1), and the value obtained shall comply with the provisions of Table 4. Cabin volume
Per capita cabin capacity = full number of patients
In the formula; cabin volume - volume calculated according to the geometric dimensions of the cabin, m\; full number of patients - number of ordinary oxygen masks in the oxygen chamber. .(1)
6.9 Air tightness test of oxygen chamber compartment and pipeline GB 12130—1995
6.9.1 Air tightness test of pipeline of gas supply system connected to gas storage tank After the pipeline system is cleaned of impurities and installed, compressed air is input to reach the maximum working pressure value of the pipeline system, and the air inlet valve is closed for 10 hours. The leakage rate shall comply with the provisions of Table 5. 6.9.2 Air tightness test of pipeline of gas supply system not connected to gas storage tank The test method is the same as that of 6.9.1. The leakage rate shall comply with the provisions of Table 5. 6.9.3 Air tightness test of high-pressure pipeline of oxygen supply system After the pipeline system is degreased and cleaned, and after installation, high-pressure dry nitrogen is passed through and the maximum working pressure value of the pipeline system is reached. The air inlet valve is closed for 10 hours. The leakage rate shall comply with the provisions of Table 5. 6.9.4 Air tightness test of low-pressure pipeline of oxygen supply system The test method is the same as that of 6.9.3. The leakage rate shall comply with the provisions of Table 5. 6.9.5 Overall air tightness test of the cabin
Close the cabin door and the delivery door, input compressed air at a rate of 0.01MPa/min, raise the cabin pressure to 0.03MPa and the maximum working pressure of the cabin, close the air inlet valve for 1h respectively, and the leakage rate shall comply with the provisions of Table 5. 6.10 Inspection of fire extinguishers
Inspect the product certificate or approval certificate of the fire extinguisher manufacturer, and its performance shall comply with the provisions of Article 5.2.10. 6.11 Compressed air purification index inspection
After the compressed air entering the cabin passes through all air purification devices and silencers, take samples for testing. The inspection report shall be provided by the local environmental protection department or health and epidemic prevention station, and the results shall comply with the provisions of Table 6. 6.12 Check of pressure gauge configuration
Check the pressure gauges configured on the control console and air supply system. The results should comply with the provisions of Article 5.3.2. 6.13 Inspection of exhaust capacity of safety valves
When the cabin pressure rises to 0.18MPa, inflate at a rate of 0.01MPa/min until all safety valves are opened. Keep the opening of the air inlet valve unchanged. The cabin pressure should not be greater than 1.1 times the set pressure. The results should comply with the provisions of Article 5.3.3. 6.14 Inspection of gas tank capacity
Start the air compressor to inflate the gas tank to the rated working pressure, then stop it, open the air inlet valves respectively, inflate the treatment cabin and the surgical rescue cabin at a pressure increase rate of 0.01MPa/min, inflate the transition cabin at a pressure increase rate of 0.1MPa/min, and raise each cabin to the maximum working pressure, then release the air, wait until the pressure gauge of the transition cabin indicates \0\, and then inflate the transition cabin to the maximum working pressure at a pressure increase rate of 0.01MPa/min. Only one of the two groups of gas tanks is used for the above test. After the pressure gauge of the small oxygen chamber indicates \0", inflate the small oxygen chamber to the maximum working pressure at a pressure increase rate of 0.01MPa/min. The gas supply capacity shall comply with the provisions of Article 5.3.4. 6.15 Inspection of the diameter of the connecting valve
Measure with a general measuring tool, and the result shall comply with the provisions of Article 5.3.5. 6.16 Inspection of emergency pressure relief time
Raise the cabin pressure to the maximum working pressure, open the emergency exhaust valve and other exhaust valves, and record the time for the cabin pressure to drop from the maximum working pressure to 0.01MPa. The result shall comply with the table 7. 6.17 Inspection of spare manually operated mechanical valves Check the manually operated mechanical valves on the control console, and the results should comply with the provisions of Article 5.3.7. 6.18 Cabin air supply noise test
6.18.1 Requirements for sound level meter and placement Use a sound level meter with an accuracy not less than Type 2. During the test, the single oxygen chamber sound level meter is placed at the head of the movable bed; the double oxygen chamber sound level meter is placed in the middle of the cabin, 0.5m above the oxygen chamber floor; the multi-person oxygen chamber sound level meter is placed 1m above the oxygen chamber floor and 1m away from the noise source. m away.
6.18.2 Test method
GB12130--1995
Close the cabin door and the delivery tube door, adjust the air inlet valve, and make the cabin pressure increase rate 0.01MPa/min. When the cabin pressure increases from 0.02MPa to 0.03MPa, the noise value measured at the noise test point specified in Article 6.18.1 shall comply with the provisions of Article 5.3.8. 6.19 Cabin pressure increase and decrease rate test
6.19.1 Minimum pressure increase rate smin test
Slightly open the air inlet valve to increase the cabin pressure from normal pressure p. to pressure p, and make the pressure p not less than 0.02MPa. Use a stopwatch to measure the time t required for the pressure increase. The Vsmin calculated by formula (2) shall comply with the provisions of Table 8. , = po
Where: Cabin pressurization rate, MPa/min, — cabin pressure after pressurization, MPa;
po — original cabin pressure (normal pressure), MPa; t — pressurization time, min.
6.19.2 Maximum pressurization rate Vmax test
Open the air intake valve to raise the cabin pressure from normal pressure p to pressure p. For the treatment cabin and surgical rescue cabin, p shall not be less than 0.05MPa; for the transition cabin, p shall not be less than 0.1MPa. Use a stopwatch to measure the time t required for pressurization. The smax calculated according to formula (2) shall comply with the provisions of Table 8.
6.19.3 Minimum depressurization rate imin test
Open the air intake valve, preset the cabin pressure p at 0.2MPa, close the air intake valve, and slightly open the exhaust valve to reduce the cabin pressure to p and make p' not greater than 0.18MPa, use a stopwatch to measure the time t required for decompression, then the uimin calculated by formula (3) shall comply with the provisions of Table 8. , p
Where: uj——cabin decompression rate, MPa/min, p——original pressure in the cabin, MPa;
p\—cabin pressure after decompression, MPa;
decompression time, min.
6.19.4 Maximum decompression rate ui inspection
Open the air intake valve and preset the cabin pressure to 0.2MPa, then close the air intake valve and open the exhaust valve to reduce the cabin pressure to p and make p' not greater than 0.1MPa, use a stopwatch to measure the time t required for decompression, then the vimax calculated by formula (3) shall comply with the provisions of Table 8. Note: The emergency exhaust valve in 6.19.3 and 6.19.4 is not allowed to be included in the inspection. 6.20 Inspection of oxygen supply system components
Inspect the components of the oxygen supply system and they shall comply with the provisions of Article 5.4.1. 6.21 Inspection of the setting of oxygen flowmeter, dynamic display device for oxygen absorption and isolation valves. Inspect the setting of the corresponding oxygen flowmeter, dynamic display device for oxygen absorption and isolation valves. The results shall comply with the provisions of Article 5.4.2. 6.22 Inspection of materials for oxygen supply and exhaust pipelines, valves and sealing gaskets. Inspect the materials for oxygen supply and exhaust pipelines, valves and sealing gaskets. The results shall comply with the provisions of Article 5.4.3. 6.23 Inspection of oxygen supply pressure stability
When the cabin pressure is the rated value, the oxygen supply pressure and flow in the cabin are provided according to the provisions of the oxygen mask, and the number of oxygen inhalers is full, observe the oxygen supply pressure gauge during the whole treatment process. The results shall comply with the provisions of Article 5.4.4. 6.24 Inspection of oxygen meter indication error, oxygen concentration over-limit alarm error and oxygen concentration in the cabin. Use an oxygen meter with a range of 100% and an error not exceeding 1%. Connect the ventilation circuit of the oxygen probe of the test oxygen meter in series with the ventilation circuit of the oxygen probe of the tested oxygen meter. After introducing air at the flow rate specified in the oxygen meter manual, adjust the calibration knob to make it 21.0%.
When the cabin pressure is rated, the oxygen supply pressure and flow rate in the cabin are provided according to the oxygen mask regulations, and the number of oxygen inhalers is full, during the whole treatment process, 117
GB12130--1995
Introduce the cabin sampling gas equal to the calibration flow rate to the oxygen meter probe, and record the indications of each oxygen meter at the same time, calculate their absolute errors, and take the maximum difference, which should comply with the provisions of Article 5.4.5. The maximum value of the indications of the test oxygen meter should comply with the provisions of Article 5.4.8. Under the above conditions, set the preset alarm value of the tested oxygen meter to any value between 22% and 25%. When the tested oxygen meter sounds and the light alarms for a moment, record the actual alarm value of the tested oxygen meter. The absolute difference between the preset value and the actual value shall comply with the provisions of Article 5.4.7. 6.25 Inspection of the sampling port of the oxygen meter
The inspection of the sampling port of the oxygen meter shall comply with the provisions of Article 5.4.6. 6.26 Inspection of the resistance of the mask breathing system
The oxygen chamber is at normal pressure, and the oxygen supply pressure is provided according to the mask regulations. Under the conditions of a breathing rate of 18 ± 2 times per minute and a flow rate of 30 ± 0.6L/min, the oxygen absorption resistance and exhalation resistance measured by the respiratory resistance tester shall comply with the provisions of Article 5.4.9. 6.27 Inspection of the exhaust oxygen pipeline
The inspection of the exhaust oxygen pipeline shall comply with the provisions of Article 5.4.10. 6.28 Inspection of the temperature meter indication error and the temperature in the cabin Use a digital inspection thermometer with a range of 0~~50℃ and an error of no more than 0.7℃. Place the probe of the inspection thermometer in the same position as the probe of the inspected thermometer. During the whole treatment process when the cabin pressure is rated and the number of oxygen inhalers is full, the indications of each thermometer at the time of pressure stabilization shall be recorded at the same time, and the absolute error shall be calculated. The maximum difference shall comply with the provisions of Article 5.5.1. Under the above-mentioned pressure stabilization conditions, the indications of the test thermometer shall comply with the provisions of Table 9. 6.29. Air conditioning noise test
A sound level meter with an accuracy not less than Type 2 shall be selected. Close the cabin door and the delivery door, keep the cabin pressure at normal pressure, turn on the air conditioner, and run the motor. The measurement positions of the sound level meter are as follows: the sound level meter of the multi-person oxygen chamber is placed 1m above the floor of the oxygen chamber and 1m away from the noise source; the sound level meter of the double oxygen chamber is placed in the middle of the cabin, 0.5m above the floor of the oxygen chamber; the sound level meter of the single oxygen chamber is placed at the head of the mobile bed. The measured noise value shall comply with the provisions of Article 5.5.2.
6.30 Inspection of air-conditioning motor and protective device 6.30.1 When the cabin pressure rises to the maximum working pressure and the rated voltage is 90%, the air-conditioning is powered off and restarted. Observe whether the air outlet of the air-conditioning is blowing to determine whether the motor is started. The result should meet the motor starting requirements of Article 5.5.3. 6.30.2 When the cabin pressure rises to the maximum working pressure and the rated voltage is 110%, the air-conditioning is started. Place the temperature measuring point of the thermocouple or the point thermometer close to the motor housing. When the temperature reaches a stable value, the reading on the thermometer should not exceed 150℃. Or connect the ammeter in series to the feeder circuit. The reading of the ammeter should not exceed the rated current value of the motor. The latter is an arbitration method. 6.30.3 Simulate the motor short circuit and overload status respectively. The protective device should meet the requirements of Article 5.5.3. 6.31 Inspection of electric heating equipment and air-conditioning control part Check the electric heating equipment of the air-conditioning system and the control part on the console. They should meet the requirements of Article 5.5.4. 6.32 Inspection of illumination value and uneven illumination in the cabin The voltage of the lighting power supply in the cabin is adjusted to the rated value. Under the premise of no natural light, the illumination in the cabin shall comply with the provisions of Table 10. 6.32.1 Illumination test of small and single and double oxygen chambers The illuminance meter of the single oxygen chamber is placed at the head of the movable bed to measure one point; the illuminance meter of the double oxygen chamber is placed on the two seats to measure two points; the illuminance meter of the small oxygen chamber is placed on the two ends and the middle seat in the cabin to measure three points. 6.32.2 Illuminance test of day and medium oxygen chambers
The illuminance meter is placed at a height of 800mm from the floor of the cabin. 6.32.2.1 The illumination test points of the treatment cabin are the six points A, B, C, D, E, and F shown in Figure 1, but the seats at the two ends of the oxygen chamber (A, D, C, F) must be included.
12130—1995
Large and medium oxygen chamber illumination test points
6.32.2.2 Transition chamber illumination test points are points A° and B' in Figure 1. 6.32.2.3 The illumination test of the surgical rescue chamber is to place the illuminometer on the operating table in the illumination area of the surgical shadowless lamp and measure one point, which shall comply with the provisions of Table 10.
6.32.3 Illumination calculation
The average illumination value in each type of oxygen chamber is calculated according to formula (4): E
Where: E——average illumination value in the cabin, lx; E, illumination value of each test point, lx;
-number of test points.
6.32.4 Calculation of illumination unevenness
The illumination unevenness of each type of oxygen chamber is calculated according to formula (5): Emax Emin
Wherein: Illuminance unevenness,
Emax—the maximum illumination value obtained in this measurement, lx; Emin———the minimum illumination value obtained in this measurement, lx; E——the average illumination value in the chamber obtained in this measurement, 1x. 6.33 Inspection of emergency lighting system
(4)
Inspect the emergency lighting system. When the power supply to the oxygen chamber is interrupted, the emergency lighting system shall comply with the provisions of Article 5.6.1.2. Use a stopwatch to record the duration of emergency lighting. It shall comply with the provisions of Article 5.6.1.2. 6.34 Inspection of communication device
Inspect the communication device of the oxygen chamber. The result shall comply with the provisions of Article 5.6.2. 6.35 Test of grounding resistance value of grounding device Remove the connection wire of oxygen chamber grounding device and connect the grounding resistance measuring instrument. The two probes used for measurement should be as far away from oxygen chamber building and grounding device as possible. The test result should meet the requirements of Article 5.6.3. 6.36 Test of dielectric strength
should be carried out in accordance with the provisions of Article 20.4 of GB9706.1-1995. The result should meet the requirements of Article 5.6.4. 6.37 Test of insulation resistance value of bioelectric socket Use a megohmmeter with a limit of 250MQ, a test voltage of 250V and an accuracy of not less than 1.0 to measure the insulation resistance between each pin (binding post) of bioelectric socket and each pin (binding post) to the cabin body. The result should meet the requirements of Article 5.6.5. 6.38 Test of ground leakage current
should be carried out in accordance with the provisions of Article 19.4 of GB9706.1-1995. The measured result should meet the requirements of Article 5.6.6. 6.39 Inspection of protective grounding impedance
This shall be carried out in accordance with the provisions of Article 18f of GB9706.1~-1995, and the measured results shall comply with the provisions of Article 5.6.7. 6.40 Inspection of voltage entering the single and double oxygen chambers 119
GB12130—-1995
The voltage entering the chamber shall comply with the provisions of Article 5.6.8. 6.41 Inspection of components, devices and wires entering the chamber The components, devices and wires entering the chamber shall comply with the provisions of Article 5.6.9.42 Inspection of instruction manual
The contents of the instruction manual of the oxygen chamber product shall comply with the provisions of Article 5.7. 7 Inspection rules
7.1 Inspection classification
Oxygen chamber inspection is divided into factory inspection (or delivery inspection) and type inspection. 7.1.1 After the installation and commissioning of the system engineering, the oxygen chamber shall be inspected unit by unit (factory inspection) by the technical inspection department of the manufacturer. It can only be submitted for acceptance after the inspection is qualified and the inspection report is issued. 7.1.2 After the factory inspection is qualified and the inspection report is issued, the inspection submitted to the user for acceptance is the delivery inspection. 7.1.3 In one of the following situations, type inspection should generally be carried out: trial production and identification of new products or old products transferred to the factory for production; a.
b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c
When the product is resumed after a long period of suspension. 7.2 Inspection items and judgment principles
7.2.1 Items that do not change with the installation conditions after the oxygen chamber design is finalized and identified do not need to be inspected at the factory. These items are: 5.2.3.1 Door size, 5.2.4.1 Observation window light transmission diameter and number, 5.2.7 Transition tank configuration, safety valve capacity in 5.3.3, 5.3.5 Connecting valve. 7.2.2 Type inspection shall be carried out in accordance with the technical requirements specified in the standard. 7.2.3 Unqualified inspection items are classified according to Table 11. Table 11
Unqualified classification
Inspection items
5. 2.5. 1
7.2.4 Rules for judging the quality of oxygen chambers
Each unqualified item of Class A is 100 points, each unqualified item of Class B is 50 points, and each unqualified item of Class C is 34 points. If the total score of unqualified items is greater than or equal to 100 points, the quality of the oxygen chamber is judged to be unqualified. 8.1 Each single-person or double-person oxygen chamber should be fixed with a nameplate in a conspicuous position on the chamber body, and each multi-person oxygen chamber should be fixed on the chamber body or on the building adjacent to the oxygen chamber. The nameplate should have the following markings:
manufacturer's name;
b. product name and model;
maximum operating pressure;
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