QB/T 2278.1-1996 Impact solenoid valve for household gas instantaneous water heaters
Some standard content:
QB/T2278.1-1996
This standard is the component standard of GB6932 "Household Gas Instantaneous Water Heater" product standard. This standard is proposed by the Quality Standard Department of China Light Industry Association. This standard is under the jurisdiction of the National Daily Hardware Standardization Center. The responsible drafting unit of this standard is Guangdong Petroleum Gas Appliance Development Co., Ltd., and the participating drafting units are Shenyang Light Industry Research and Design Institute, Cixi Gas Safety Appliance Factory, Guangdong Shenzhou Gas Appliance Co., Ltd. The main drafters of this standard are Yang Mingbin, Lv Fu, Li Yang, and Zhao Rouping. 563
1 Scope
Light Industry Standard of the People's Republic of China
Household Gas Instantaneous Water Heater
Impact Solenoid Valve
QB/T 2278.1--1996
This standard specifies the definition, model, basic parameters, technical requirements, test methods, marking and packaging of the impact solenoid valve of household gas instantaneous water heater with a rated voltage of dc3V. 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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB191--1990 Pictorial markings for packaging storage and transportation
GB/T2829---1987 Periodic inspection counting sampling procedures and sampling tables (applicable to the inspection of production process stability) 3 Definitions
This standard adopts the following definitions.
3.1 No-load action voltage (Uk)
When the moving parts of the impact solenoid valve are not blocked by any external objects, when a pulse voltage with a certain amplitude of 500ms is applied to both ends of the impact solenoid valve coil, the impact solenoid valve is actuated and reaches the limit position. The minimum amplitude of the pulse voltage is the no-load action voltage Uk.
3.2 Load action voltage (U)
When a pulse voltage of a certain amplitude of 500ms is applied to both ends of the impact solenoid valve coil, the moving parts of the impact solenoid valve should be able to generate a battery thrust of more than 6N to the target at its front end limit position. The minimum amplitude of the pulse voltage is the load action voltage UF. 3.3 Reset performance
After the moving parts of the impact solenoid valve are pushed out to the limit position, they should be able to be reset smoothly under the action of a certain external force when the coil is not energized.
4 Models and basic parameters
4.1 Model
The product model mark is represented by the impact solenoid valve code CD, working stroke code, product modification code and standard number. CD
Standard No.
Remodel code A, B, C.)
-Working stroke code (2 digits)
Marking example:
CD30-AQB/T2278.1: Working stroke is 30mm, A-type impact solenoid valve approved by China Light Industry Association on January 27, 1997
TTiKAoNi KAca-
Implementation on September 1, 1997
Working stroke code
Effective working stroke, mm
4.2 Basic parameters
QB/T 2278.1-1996
Table 1 Comparison of working stroke code and actual sizeCD25
4.2.1 Applicable gas types: artificial coal gas, natural gas, liquefied petroleum gas. 4.2.2 Rated voltage: dc3V.
4.2.3 Stroke:
The stroke of CD30 is: total stroke (4.8±0.2) mm, effective working stroke 3 mm. The stroke of CD25 is: total stroke (4.0±0.2) mm, effective working stroke 2.5 mm. 4.2.4 Working pressure: below 5 kPa.
4.2.5 Allowable pressure resistance: below 0.03 MPa. Working temperature: -20~+60℃ (no icing). 4.2.6
Working humidity: 35%~90%RH (no frost). 4.2.7
4.2.8 Storage temperature: -25~~+80℃.
4.2.9 Storage humidity: 25%~95%RH.
4.2.10 Installation direction: within ±5° in horizontal direction. Insulation grade: Class A (105C).
Technical requirements
Coil resistance R
The R value of CD30 is: 30+10%
The R value of CD25 is: 3.50±10%
5.2No-load action voltage Uk
The no-load action voltage should be below dc0.5V. 5.3Load action voltage Ur
After the valve is installed, the gap between the top of the valve stem and the end of the pushed object is 1.5mm, which is below dc1.9V. 5.4Reset performance
The impact solenoid valve should be able to reset smoothly after power failure. 5.5Air tightness
No leakage under 4.2kPa air pressure.
5.6Insulation resistance
The insulation resistance between the coil and the metal frame is not less than 5MQ. 5.7Moisture resistance
After being placed in a humid environment, the insulation resistance is not less than 1MQ. 5.8 Durability
5.8.1 Room temperature durability: After repeated tests at room temperature for 300,000 times, it meets the requirements of 5.2 to 5.6. CD30
5.8.2 Temperature cycle durability: After 300,000 tests at different temperatures, it meets the requirements of 5.2 to 5.6. 5.9 Gas resistance (seals)
In addition to meeting the requirements for sealing performance, the sealing material shall also be resistant to gas corrosion and meet the requirements of 5.9.1 to 5.9.2. 565
5.9.1 No embrittlement, softening or hardening.
5.9.2 The volume change rate is within 10%.
5.10 Noise
QB/T 2278.1—1996
Action noise is less than or equal to 55dB (A), reset noise is less than or equal to 55dB (A). 5.11 Heat resistance
After the impact solenoid valve is placed in a high temperature environment, it meets the requirements of 5.2~5.6, and the parts have no abnormal conditions such as cracks, relaxation, expansion, deformation, etc.
5.12 Cold resistance
After the impact solenoid valve is placed in a cold environment, it meets the requirements of 5.2~5.6, and the parts have no abnormal conditions such as cracks, relaxation, expansion, deformation, etc.
5.13 Thermal cycle
After being placed in cold and hot environments repeatedly, it meets the requirements of 5.2~~5.6, and the parts have no abnormal conditions such as cracks, relaxation, expansion, deformation, etc.
5.14 Vibration resistance
After the vibration test, it meets the requirements of 5.2~5.6, and the parts have no abnormal conditions such as cracks, relaxation, expansion, deformation, etc. 5.15 Pull-out strength
The wire of the impact solenoid valve has no loosening or breaking during the pull-out test. 5.16 Impact resistance
After the impact test, the impact solenoid valve meets the requirements of 5.2~5.6. 5.17 Temperature rise
dc3V is continuously applied to the coil, the saturation temperature rise of the coil does not exceed 25℃, and the saturation temperature rise of the winding frame does not exceed 15℃. 6 Test method
6.1 Sampling
6.1.1 Each product shall be inspected for the following items before leaving the factory. a.
Appearance;
Line resistance;
No-load action voltage, load action voltage; reset performance;
Air tightness;
Stroke.
Type inspection: Type inspection should be carried out in any of the following situations. Trial production and identification of new products or old products transferred to the factory for production; After formal production, if there are major changes in structure, materials, and processes that may affect product performance; During normal production, an inspection should be carried out once a year; After a long period of suspension of production, when the factory inspection results are significantly different from the last type inspection when production is resumed; When the national quality supervision agency proposes a type inspection requirement. f.
6.1.3 The sampling conditions, methods and sample storage of type inspection shall be carried out in accordance with GB/T2829. The secondary sampling plan with discrimination level 1 shall be adopted. The batch quality shall be calculated based on the number of defective products per 100 units. The sample size nl=n2=5. The RQL value of the defective quality level is 65 for Class C, 50 for Class B and 20 for Class A. The inspection items are shown in Table 2.
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Inspection items
Load action voltage
Reset performance
Coil resistance
Air tightness
Flame resistance
Heat resistance
Perturbation resistance
Pulling strength
Flipping God strike
Air cut action voltage
Insulation resistance
Condensation resistance
Constant moisture avoidance durability
Temperature spot cycle durability
QB/T 2278.1-1996
Table 2 Type inspection items
Unqualified classification
Corresponding clauses
Discrimination level
Sample size
nmn - 5
Unqualified quality level (RQL)
Note: Items 11, 15, and 16 should be inspected on different samples. If the sample is not enough, double the sample. 6.1.4 Test environment temperature: (20 ± 5) ℃ (except coil resistance test). See Table 3 for test instruments and equipment.
Table 3 Test instruments and equipment
Test items
Air leakage
Thermometer
Hygrometer
Surface thermometer
U-shaped pressure gauge
Digital multimeter
Moisture meter
Sound level meter
Note: All instruments should be calibrated according to relevant regulations before use. 6.2 Test items
0~~50℃
010000Pa
0~10mm
10~120dB
Minimum scale
6.2.1 Wire resistance R (ambient temperature 20C): Use a digital multimeter to detect the wire resistance R. 6.2.2 No-load action voltage detection: Place the impact solenoid valve without the reset part horizontally, apply an adjustable DC voltage from small to large to the impact solenoid valve, start the impact solenoid valve, and push the valve stem to the limit position. The voltage displayed at this time is the no-load action voltage of the impact solenoid valve.
QB/T2278.1—1996
6.2.3 Load action voltage detection: Place the impact solenoid valve on the inspection fixture shown in Figure 1 and clamp it. When the gap between the impact valve and the positioning plate is set to 1.5mm, the constant pressure source provides a certain voltage to the impact solenoid valve. After the impact valve top rod rushes out and hits the positioning plate, the lowest amplitude of its pulse voltage is the load action voltage.
Adjusting screw
Dial indicator
Positioning plate
Reset part
Test fixture
Program-controlled constant pressure source
6.2.4 Reset performance: See Figure 2 for the test device. Q
Electronic scale
At the moment when the impact solenoid valve is powered off, the reset spring should be able to reset the moving parts of the impact solenoid valve smoothly. Program-controlled double-group adjustable constant pressure sourcewwW.bzxz.Net
Test valve
Tested valve
Reset spring
Solenoid valve spring
Impact solenoid valve
6.2.5 Air tightness: Rotate the impact solenoid valve and clamp it on the inspection fixture shown in Figure 3, add 4.2kPa air pressure from the air inlet side, close the valve after stabilizing the pressure, and the liquid level of the U-shaped pressure gauge should not drop within 1 minute. 6.2.6 Insulation resistance: The insulation resistance between the coil and the metal frame tested with a dc500V megohmmeter should be no less than 5M2 (ambient temperature 20°C).
6.2.7 Moisture resistance: After being placed in an environment with a temperature of (40±2)°C and a relative humidity of 90% to 95%RH for 72 hours, the insulation resistance measured with a dc500V megohmmeter should be no less than 1MQ.
TTi KAoNni KAca-
Disassembled air
Tested impact solenoid valve
QB/T2278.1-—1996
Testing fixture
U-type pressure gauge
6.2.8 Durability
6.2.8.1 Normal temperature durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, repeat 300,000 times, and meet the provisions of 5.2~5.6. 6.2.8.2 Temperature cycle durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, after the test is completed under the following conditions, return to normal temperature for 1~2h, and meet the provisions of 5.2~5.6. (—20±3)℃
(+60±3)℃
(—20±3)℃
100,000 times
100,000 times
100,000 times
Total 300,000 times
6.2.9 Combustion gas resistance (seals): At room temperature, immerse in n-pentane for 72 hours, take it out and place it in the air for 24 hours, and meet the requirements of 5.9.1~5.9.2.
6.2.10 Noise: Add dc3V voltage to the impact solenoid valve coil, and measure the noise with a sound level meter at a horizontal distance of 1m from the impact solenoid valve being tested.
6.2.11 Heat resistance: After being placed in an environment with a temperature of (80±3)C for 48 hours, return to room temperature for 1~2 hours. 6.2.12 Cold resistance: After being placed in an environment with a temperature of (-25 ± 3) ℃ for 48 hours, return to normal temperature for 1~2 hours. 6.2.13 Thermal cycle: After being placed in an environment with a temperature of (-20 ± 3) ℃ for 1 hour, place it in an environment with a relative humidity of (80 ± 3) ℃ and (65 ± 20)% RH for another 1 hour. This is considered as a cycle. After 10 cycles of testing, return to normal temperature for 1~2 hours. 6.2.14 Vibration resistance: Vibration frequency is 10Hz, amplitude is 5mm, and the X, Y, and Z directions are tested for 60 minutes each. 6.2.15 Pull-out strength: In the direction of the wire outlet, apply a force of 20N to each wire for more than 1 minute. 6.2.16 Impact resistance: Install the impact solenoid valve on the valve body and let it fall freely from a height of 30cm to the concrete surface. Note: Damage that does not damage the wire and function is excluded. Temperature rise: Continuously apply dc3V voltage to the coil and measure its temperature rise with a surface thermometer. 6. 2. 17
7 Marking, packaging
7.1 Marking
Each impact solenoid valve should be equipped with a standardized nameplate at an appropriate location to indicate the following items: model of impact solenoid valve;
Rated voltage;
Manufacturer name;
Manufacture date (or number) or production batch number. d.
The packaging box should have the following markings: product name, trademark, model, weight, production date, factory name, factory address, postal code, implementation standard and name, afraid of moisture, upward, and handle with care. The afraid of moisture, upward, and handle with care should comply with the provisions of GB191. 569
7.2 Packaging
QB/T 2278.1-1996
7.2.1 Products are packed in boxes. The products and certificates should be complete in the boxes. 7.2.2 During transportation, the packages should be protected from violent movement, squeezing, rain and chemical corrosion. They must be handled with care and neatly stacked. Rolling and throwing are strictly prohibited.
The packages should be stored in a dry and ventilated warehouse with no corrosive gas around. 7.2.3
-riKAoNniKAca-5mm, the constant pressure source provides a certain voltage to the impact solenoid valve, and the impact valve push rod rushes out and hits the positioning plate. The minimum amplitude of its pulse voltage is the load action voltage.
Adjusting screw
Digital indicator
Positioning plate
Reset component
Test fixture
Program-controlled constant pressure source
6.2.4 Reset performance: The test device is shown in Figure 2. Q
Electronic scale
At the moment when the impact solenoid valve is powered off, the reset spring should be able to reset the moving parts of the impact solenoid valve smoothly. Program-controlled dual-group adjustable constant pressure source
Test valve
Tested valve
Reset spring
Solenoid valve spring
Impact solenoid valve
6.2.5 Air tightness: Rotate the impact solenoid valve and clamp it on the inspection fixture shown in Figure 3, add 4.2kPa air pressure from the air inlet side, close the valve after stabilizing the pressure, and the liquid level of the U-shaped pressure gauge should not drop within 1 minute. 6.2.6 Insulation resistance: Use a dc500V megohmmeter to test the insulation resistance between the coil and the metal frame, which should be no less than 5M2 (ambient temperature 20℃).
6.2.7 Moisture resistance: After being placed in an environment with a temperature of (40±2)℃ and a relative humidity of 90%~95%RH for 72 hours, immediately use a dc500V megohmmeter to measure the insulation resistance, which should be no less than 1MQ.
TTi KAoNni KAca-
Disassembled air
Tested impact solenoid valve
QB/T2278.1-—1996
Testing fixture
U-type pressure gauge
6.2.8 Durability
6.2.8.1 Normal temperature durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, repeat 300,000 times, and meet the provisions of 5.2~5.6. 6.2.8.2 Temperature cycle durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, after the test is completed under the following conditions, return to normal temperature for 1~2h, and meet the provisions of 5.2~5.6. (—20±3)℃
(+60±3)℃
(—20±3)℃
100,000 times
100,000 times
100,000 times
Total 300,000 times
6.2.9 Combustion gas resistance (seals): At room temperature, immerse in n-pentane for 72 hours, take it out and place it in the air for 24 hours, and meet the requirements of 5.9.1~5.9.2.
6.2.10 Noise: Add dc3V voltage to the impact solenoid valve coil, and measure the noise with a sound level meter at a horizontal distance of 1m from the impact solenoid valve being tested.
6.2.11 Heat resistance: After being placed in an environment with a temperature of (80±3)C for 48 hours, return to room temperature for 1~2 hours. 6.2.12 Cold resistance: After being placed in an environment with a temperature of (-25 ± 3) ℃ for 48 hours, return to normal temperature for 1~2 hours. 6.2.13 Thermal cycle: After being placed in an environment with a temperature of (-20 ± 3) ℃ for 1 hour, place it in an environment with a relative humidity of (80 ± 3) ℃ and (65 ± 20)% RH for another 1 hour. This is considered as a cycle. After 10 cycles of testing, return to normal temperature for 1~2 hours. 6.2.14 Vibration resistance: Vibration frequency is 10Hz, amplitude is 5mm, and the X, Y, and Z directions are each tested for 60 minutes. 6.2.15 Pull-out strength: In the direction of the wire outlet, apply a force of 20N to each wire for more than 1 minute. 6.2.16 Impact resistance: Install the impact solenoid valve on the valve body and let it fall freely from a height of 30cm to the concrete surface. Note: Damage that does not damage the wire and function is excluded. Temperature rise: Continuously apply dc3V voltage to the coil and measure its temperature rise with a surface thermometer. 6. 2. 17
7 Marking, packaging
7.1 Marking
Each impact solenoid valve should be equipped with a standardized nameplate at an appropriate position to indicate the following items: model of impact solenoid valve;
Rated voltage;
Manufacturer name;
Manufacture date (or number) or production batch number. d.
The packaging box should have the following markings: product name, trademark, model, weight, production date, factory name, factory address, postal code, implementation standard and name, afraid of moisture, upward, handle with care, etc. The afraid of moisture, upward, handle with care, etc. markings should comply with the provisions of GB191. 569
7.2 Packaging
QB/T 2278.1-1996
7.2.1 Products are packed in boxes. The products and certificates should be complete in the boxes. 7.2.2 During transportation, the packages should be protected from violent movement, squeezing, rain and chemical corrosion. They must be handled with care and neatly stacked. Rolling and throwing are strictly prohibited.
The packages should be stored in a dry and ventilated warehouse with no corrosive gas around. 7.2.3
-riKAoNniKAca-5mm, the constant pressure source provides a certain voltage to the impact solenoid valve, and the impact valve push rod rushes out and hits the positioning plate. The minimum amplitude of its pulse voltage is the load action voltage.
Adjusting screw
Digital indicator
Positioning plate
Reset component
Test fixture
Program-controlled constant pressure source
6.2.4 Reset performance: The test device is shown in Figure 2. Q
Electronic scale
At the moment when the impact solenoid valve is powered off, the reset spring should be able to reset the moving parts of the impact solenoid valve smoothly. Program-controlled dual-group adjustable constant pressure source
Test valve
Tested valve
Reset spring
Solenoid valve spring
Impact solenoid valve
6.2.5 Air tightness: Rotate the impact solenoid valve and clamp it on the inspection fixture shown in Figure 3, add 4.2kPa air pressure from the air inlet side, close the valve after stabilizing the pressure, and the liquid level of the U-shaped pressure gauge should not drop within 1 minute. 6.2.6 Insulation resistance: Use a dc500V megohmmeter to test the insulation resistance between the coil and the metal frame, which should be no less than 5M2 (ambient temperature 20℃).
6.2.7 Moisture resistance: After being placed in an environment with a temperature of (40±2)℃ and a relative humidity of 90%~95%RH for 72 hours, immediately use a dc500V megohmmeter to measure the insulation resistance, which should be no less than 1MQ.
TTi KAoNni KAca-
Disassembled air
Tested impact solenoid valve
QB/T2278.1-—1996
Testing fixture
U-type pressure gauge
6.2.8 Durability
6.2.8.1 Normal temperature durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, repeat 300,000 times, and meet the provisions of 5.2~5.6. 6.2.8.2 Temperature cycle durability: Add dc3V voltage to the impact solenoid valve coil, under load, with 0.5s on and 1s off as a cycle, after the test is completed under the following conditions, return to normal temperature for 1~2h, and meet the provisions of 5.2~5.6. (—20±3)℃
(+60±3)℃
(—20±3)℃
100,000 times
100,000 times
100,000 times
Total 300,000 times
6.2.9 Combustion gas resistance (seals): At room temperature, immerse in n-pentane for 72 hours, take it out and place it in the air for 24 hours, and meet the requirements of 5.9.1~5.9.2.
6.2.10 Noise: Add dc3V voltage to the impact solenoid valve coil, and measure the noise with a sound level meter at a horizontal distance of 1m from the impact solenoid valve being tested.
6.2.11 Heat resistance: After being placed in an environment with a temperature of (80±3)C for 48 hours, return to room temperature for 1~2 hours. 6.2.12 Cold resistance: After being placed in an environment with a temperature of (-25 ± 3) ℃ for 48 hours, return to normal temperature for 1~2 hours. 6.2.13 Thermal cycle: After being placed in an environment with a temperature of (-20 ± 3) ℃ for 1 hour, place it in an environment with a relative humidity of (80 ± 3) ℃ and (65 ± 20)% RH for another 1 hour. This is considered as a cycle. After 10 cycles of testing, return to normal temperature for 1~2 hours. 6.2.14 Vibration resistance: Vibration frequency is 10Hz, amplitude is 5mm, and the X, Y, and Z directions are tested for 60 minutes each. 6.2.15 Pull-out strength: In the direction of the wire outlet, apply a force of 20N to each wire for more than 1 minute. 6.2.16 Impact resistance: Install the impact solenoid valve on the valve body and let it fall freely from a height of 30cm to the concrete surface. Note: Damage that does not damage the wire and function is excluded. Temperature rise: Continuously apply dc3V voltage to the coil and measure its temperature rise with a surface thermometer. 6. 2. 17
7 Marking, packaging
7.1 Marking
Each impact solenoid valve should be equipped with a standardized nameplate at an appropriate location to indicate the following items: model of impact solenoid valve;
Rated voltage;
Manufacturer name;
Manufacture date (or number) or production batch number. d.
The packaging box should have the following markings: product name, trademark, model, weight, production date, factory name, factory address, postal code, implementation standard and name, afraid of moisture, upward, and handle with care. The afraid of moisture, upward, and handle with care should comply with the provisions of GB191. 569
7.2 Packaging
QB/T 2278.1-1996
7.2.1 Products are packed in boxes. The products and certificates should be complete in the boxes. 7.2.2 During transportation, the packages should be protected from violent movement, squeezing, rain and chemical corrosion. They must be handled with care and neatly stacked. Rolling and throwing are strictly prohibited.
The packages should be stored in a dry and ventilated warehouse with no corrosive gas around. 7.2.3
-riKAoNniKAca-
The following markings should be on the packaging box: product name, trademark, model, weight, production date, factory name, factory address, postal code, implementation standard and name, afraid of moisture, upward, handle with care and other signs. The afraid of moisture, upward, handle with care and other signs should comply with the provisions of GB191. 569
7.2 Packaging
QB/T 2278.1-1996
7.2.1 The product is packaged in packaging boxes. The product and certificate of conformity in the packaging box should be complete. 7.2.2 During transportation, the package should be protected from violent movement, extrusion, rain and chemical corrosion. It must be handled with care and stacked neatly. Rolling and throwing are strictly prohibited.
The package should be stored in a dry and ventilated warehouse with no corrosive gas around. 7.2.3
-riKAoNniKAca-
The following markings should be on the packaging box: product name, trademark, model, weight, production date, factory name, factory address, postal code, implementation standard and name, afraid of moisture, upward, handle with care and other signs. The afraid of moisture, upward, handle with care and other signs should comply with the provisions of GB191. 569
7.2 Packaging
QB/T 2278.1-1996
7.2.1 The product is packaged in packaging boxes. The product and certificate of conformity in the packaging box should be complete. 7.2.2 During transportation, the package should be protected from violent movement, extrusion, rain and chemical corrosion. It must be handled with care and stacked neatly. Rolling and throwing are strictly prohibited.
The package should be stored in a dry and ventilated warehouse with no corrosive gas around. 7.2.3
-riKAoNniKAca-
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