Some standard content:
The Machinery Industry Standard of the People's Republic of China
JB/T 8540-1997
Water Steam Jet Vacuum Pump
1997-04-15 Release
The Ministry of Machinery Industry of the People's Republic of China
1998-01-01 Implementation
J/548-·1997
This standard is a revision of ZB178007-87..Water Vacuum Jet Vacuum System Type Basic Parameters" and ZI78CCR Water Vapor Jet Vacuum System Type 3, 219 European Standards, and has made improvements and supplements to the vacuum width and performance test method, and added the necessary dimensions of the test cover. The vacuum pressure unit is kFa. The water and natural gas pressure unit is MPa. This is consistent with the selected instrument quality. The original and standard specifications are as follows: the unit of force used in the technical standard is the same as the national standard. This standard is effective from the date of the implementation of the previous day 23780077.3178008-87,2317800987. Appendix A, Appendix B, Appendix C are the new appendices of the standard: proposed by the National Vacuum Technology Standardization Technical Committee, the drafting unit of this standard: Vacuum Technology Research Institute of the Ministry of Industry, the only international standard changes.
1 Scope
China Machinery Industry Standard
Water jet vacuum pump
JB/T $540—1997
21 [78 60G ..- B?
This standard specifies the type and basic parameters, design requirements, oil sample and evaluation method, inspection method, inspection specification, marking, packaging, storage and other aspects of water vapor vacuum pumps.
This standard is applicable to water vapor vacuum pumps with a working medium of 10-10P (hereinafter referred to as "vacuum pumps"). 2 Reference standards
The following standards contain provisions that are cited in this standard as the contractual provisions of this standard. When this standard is published, the versions shown are valid. All standards will be used. The latest version of the following standards shall be selected as the applicable standard. GH151—B9
GB19190
CB/T262493
G 13306—91
GB/T 133S4
H253550
J3/T 7255- 81
JE/T 7673--45
3 Definition
Technical conditions for steel welded pressure pipes
Packing and storage mark
Flow rate standard for volumetric flowmeters, orifice plates, and venturi-filled flowmeters
General technical parts for packaging of electrical products
Pressure pipes, packaging, transportation
Volume vacuum performance test method
Vacuum design as a comprehensive method
This standard uses the following definitions.
3.1 Suction point force
The pressure at the suction port of the water vapor wide-injection vacuum pipe is kP. 3.2 Outlet air
For non-gases, the unit of empty bag mass flow rate is the molecular weight temperature mass conversion. 3.3 Suction volume
The mass flow rate of the gas passing through the inlet per unit time, often nominally in equivalent gas, unit is limited, 3.4 Suction temperature
The temperature of the exhaust gas at the suction door, unit is 35 Working steam consumption
Under the given conditions, the working steam flow disk is evaluated in the position time; the dense injection system refers to the mass flow rate through the entire nozzle, the code is kg/h..
3.6 Cooling to
Under the given T.Outlet . Single-time cooling water volume flow rate: if there is a condenser, it refers to the total volume flow rate, single transmission is */h, 3.7 stability
When the working steam is slightly reduced. The discharge pressure is not high and the cooling water inlet temperature is increased. The suction force of the object does not fluctuate violently. The object is approved by the Ministry of Machinery Industry 19071415
1998-01-01
Rapid working performance:
3. Daily damage pressure
JB/T 8540—1997
When the recording is in an unstable working state, 1. The steam pressure or discharge force: the unit is kP=, 3.9 According to the working force
, the steam is discharged or discharged in the specified working state, which is kP3.10 Critical flow
When the pressure downstream of the nozzle and the upstream pressure are lower than the critical value, the mass flow of the nozzle is selected. In the standard discharge state (the critical value of air is 1.5283. The steam is about to be opened but 2.32.1.3.11 Subcritical flow
When the ratio of the main force to the upstream pressure is lower than the critical value, the mass flow at the reverse injection end is taken. Type and basic parameters
4.1 Type
Basic technical specifications and Li 1
No.
Positive distance: Cooling device: Figure pipe point cooling
4. 2 Basic parameters
Basic parameters Hong table.
XX\XIXORX X2XCXS
3 XXYx0 or Y 2H X3
YxxxxXYx
J Steam pressure range 0.2MPa~1.GMPa Yaxiang design D:J Use 0.4MPa.0.MPa.0.9MPx Cooling water inlet design Zhou Hui is 25 or 324. 3
4.3.1 Representation
The model representation of the system shall comply with the provisions of JBT7673. 4.3.2 Example
Pn.63 50/0.6 1
That is: the suction pressure of the steam pump is 0.63sPa, the auxiliary volume is 59k/h, and the real gas can be recorded as 0kg/hT. The minimum steam volume is c.6MPt.
Dynamic gas volume
JB/TR540-1997
16.3kP25 cold temperature P temperature series
2 is with this heat: one is clean without this classification,
5 Technical requirements
5.! The rest should comply with the provisions of the technical standards and should be prepared with drawings and technical documents approved by the prescribed procedures. 5.2 The main performance parameters of the system should comply with the provisions of Table 2. When the sensitive suction stress is applied, the deviation between the actual gas volume and the bottle rated gas volume shall not exceed 10 medicine. 5.
5.4 After the cylinder is completely sucked in, the difference between the actual discharge pressure and the set discharge pressure shall not exceed 10% of the cylinder position. 5.5 The difference between the measured steam volume and the rated volume shall not exceed 15%. 5.G
The difference between the actual cooling water consumption and the set consumption shall not exceed 5%. When the steam pressure drops by 5% compared with the design value and the cooling water level increases by 2% compared with the design value, the pump should work stably and the pumping time will not exceed the set pumping time. 5.8
The connection between the ejector and the service section shall be smooth and free of pits and convexities, and the tightness shall not be penetrated. · The inner surface of the welded parts shall not have any debris such as welding, welding nodules, etc. The weld joints shall be smooth, and the inner surface of the spray storage shall not be coated with pigs. The spray end shall be subjected to a C.MPa (gauge pressure) pressure test, and a n.2MPa gauge pressure) air pressure test. The pressure shall be maintained for 3 minutes. There shall be no leakage. Large energy parts are allowed to use oil seals. The pressure test of 1.5 is the design pressure. There shall be no leakage for the verification of min. 5.10 The pressure vessels such as hot steam separators and water drums shall be in accordance with (150 regulations, 5.1 Installation
The integral installation piece shall be tested for leakage with 0.15MPa (gauge pressure) compressed air. Within 24 hours, the average drop in the number of floors per hour shall not exceed 2
…When the overhead layout is used, the water section of the condenser shall be installed vertically, and the water pipe shall be connected to the horizontal direction and the steam pipe shall be 25”:-The steam pipe shall be protected by micro measures. The steam pipe shall be inclined to the steam cylinder at a height of 1 head. The water shall be flushed into the small pipe under the device and the depth shall be equal to its pipe diameter and not less than 200m. (Sampling and judgment method
6.1 Sampling method
6.1.1 Composition of inspection batch
Single pump is formed by simple collection Report batch: Check the batch and the shipping batch, which may or may not be related to the production batch, sales batch, and transportation batch. The batch composition, the batch quality level, annual production records and production time are basically the same. The composition of the batch, the number of people who make the batch and the way to identify the batch, etc., shall be determined by the time and the sampling method. The number of samples in each batch is 2 and the number of qualified judgments is 0. 6.1.3 The inspection of this batch shall not be based on the random inspection rate in the batch. It may be reversed after the batch is formed or during the batch composition and operation. 6.1.4 The samples taken for inspection shall be inspected and adjusted according to the method specified in Section 7.2. Judgment method || tt || The mother batch must meet all the technical requirements of this standard to be a qualified product; if the mother product does not refer to any of the specifications of this standard, it is classified as an unqualified product: If both samples of the two batches are qualified products, the batch is judged as qualified, otherwise the batch is judged as unqualified. 7 Test method 7.1 Test items: a) Determine the maximum suction pressure of oil and gas: b) Determine the discharge pressure and suction pressure: d) Determine the steam consumption under certain working conditions; f) Determine the cooling water consumption under certain working conditions; 7.2 Test conditions 7.2.1 Test items: a) Gas under full chamber: b) Water vapor at any temperature; 2) Mixed gas containing air at room temperature and water vapor at any humidity; 2) For gases other than air and water, the gas should be converted according to the regression coefficient and molecular weight, and converted into 20% air equivalent water vapor basis.
7.2.2 The test environment temperature is 20°C ± 5°C. 4
JB/T 8540—1997
7.2.3 The working steam pressure and cooling water temperature shall meet the requirements of the vehicle. 7.2.4 The test plate shall not be tested for pressure and gas according to the requirements of 5.9. 1
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7.2 test device
figure 3 is a single stage injection system test device:
figure 4 is a two stage injection pump test device with stage condensation,:
same position
center improvement
work heart
European popularity
[B/T 854D-1997
Note| ... 1 Test hood
7.3.1.1 The test hood structure and main dimensions are shown in Figure 5. 7.3.1.2 When measuring the air flow alone, the air flow meter does not need to be connected to the air inlet, but the internal pump suction must not be too small.
JB/T85401997
7. . 1. 3 When the pressure is 0. 13 kPa, the standard deviation is the test hood shown in Figure 2.
Light efficiency
Figure 6 Test
7.3.2 Standard method
7.3.2.1 The shape and dimensions of the flow diagram are shown in Figure 7.
Late diameter mm
Its diameter is 1.snm\-2.1mu and is suitable for clinical.sx
7.3.2.2 The inner diameter of the nozzle is 2.5mm, and the inner diameter is 1.snm\-2.1mu. It is suitable for clinical.sx
7.3.2.2 The inner diameter of the nozzle is 2.5mm, and the inner diameter is 2.5mm. The inner diameter is 1.snm\-2.1mu. It is suitable for clinical.sx
7.3.2.2 The inner diameter of the nozzle is 2.5mm, and the .... By adjusting the difference between the upstream and downstream of the suction nozzle, the air volume is increased, and the critical flow rate is measured as shown in Figure 10. The critical steam volume is obtained by adjusting the pressure of the upper steam nozzle and the valve. The critical flow rate of the steam is measured as shown in Figure 11. The flow rate is adjusted by the valve downstream and the size of the steam flow rate is brought about. 7.3.3.5 The flow rate of the pipe is shown in Figure 12. 7.3.3.5.1 When the flow rate is less than 2kg, it is recommended to use a drip pipe to measure the flow rate. 7.3.3.5.2 Select the appropriate drip pipe size for the air flow. The inner diameter of the drip pipe shall not be less than m. 7.3.3.5.3 The total flow difference of the full pipe shall not be less than 5%. 5
Intermountain highway quality company
Figure 8 Air critical steam flow device
Institute of protectionWww.bzxZ.net
Factory power meter type point
JB/T8540—J997
Figure 9 Air subcritical flow plate
Control board
Water vapor critical flow device
Figure 1 Water vapor subcritical flow device2.3
7.3.3 Flow measurement device
JB/T 8540-1997
Figure 7 Precision standard flow nozzle
T.3.3.! The critical air flow measurement device is shown in Figure 8: The critical air flow can be obtained by combining different fluid nozzles. 7.3.3.2 The subcritical air flow measurement device is shown in Figure 9. By adjusting the difference between the upstream and downstream of the suction nozzle, the air volume is increased, and the critical flow rate is measured as shown in Figure 10. The critical steam volume is obtained by adjusting the pressure of the upper steam nozzle and the valve. The critical flow rate of the steam is measured as shown in Figure 11. The flow rate is adjusted by the valve downstream and the size of the steam flow rate is brought about. 7.3.3.5 The flow rate of the pipe is shown in Figure 12. 7.3.3.5.1 When the flow rate is less than 2kg, it is recommended to use a drip pipe to measure the flow rate. 7.3.3.5.2 Select the appropriate drip pipe size for the air flow. The inner diameter of the drip pipe shall not be less than m. 7.3.3.5.3 The total flow difference of the full pipe shall not be less than 5%. 5
Intermountain highway quality company
Figure 8 Air critical steam flow device
Institute of protection
Factory power meter type point
JB/T8540—J997
Figure 9 Air subcritical flow plate
Control board
Water vapor critical flow device
Figure 1 Water vapor subcritical flow device2.3
7.3.3 Flow measurement device
JB/T 8540-1997
Figure 7 Precision standard flow nozzle
T.3.3.! The critical air flow measurement device is shown in Figure 8: The critical air flow can be obtained by combining different fluid nozzles. 7.3.3.2 The subcritical air flow measurement device is shown in Figure 9. By adjusting the difference between the upstream and downstream of the suction nozzle, the air volume is increased, and the critical flow rate is measured as shown in Figure 10. The critical steam volume is obtained by adjusting the pressure of the upper steam nozzle and the valve. The critical flow rate of the steam is measured as shown in Figure 11. The flow rate is adjusted by the valve downstream and the size of the steam flow rate is brought about. 7.3.3.5 The flow rate of the pipe is shown in Figure 12. 7.3.3.5.1 When the flow rate is less than 2kg, it is recommended to use a drip pipe to measure the flow rate. 7.3.3.5.2 Select the appropriate drip pipe size for the air flow. The inner diameter of the drip pipe shall not be less than m. 7.3.3.5.3 The total flow difference of the full pipe shall not be less than 5%. 5
Intermountain highway quality company
Figure 8 Air critical steam flow device
Institute of protection
Factory power meter type point
JB/T8540—J997
Figure 9 Air subcritical flow plate
Control board
Water vapor critical flow device
Figure 1 Water vapor subcritical flow device
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