CN114323633B - Testing device and method for overflow valve - Google Patents
Testing device and method for overflow valve Download PDFInfo
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- CN114323633B CN114323633B CN202111657916.0A CN202111657916A CN114323633B CN 114323633 B CN114323633 B CN 114323633B CN 202111657916 A CN202111657916 A CN 202111657916A CN 114323633 B CN114323633 B CN 114323633B
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- 238000007789 sealing Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000010998 test method Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 description 2
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Abstract
The invention discloses a testing device and a testing method of an overflow valve, comprising a main air source, a first air supply branch and a second air supply branch, wherein the first air supply branch and the second air supply branch are communicated with the main air source; the tail ends of the first air supply branch and the second air supply branch are combined into a fifth air supply branch; the first air supply branch is sequentially provided with a first pressure regulating valve, a first plug door, a fifth plug door, an electromagnetic valve, a first pressure gauge and a measured overflow valve; the first air supply branch is connected with a third air supply branch and a fourth air supply branch; a second pressure regulating valve, a third air storage cylinder and an electromagnetic valve are sequentially arranged on the second air supply branch; the fifth air supply branch is provided with a second pressure gauge and is connected with three groups of tail end pipelines, and the tail end pipelines are respectively connected with the water tank, the fourth air storage cylinder and the fifth air storage cylinder. The testing method can realize pressure test, sealing test, reverse check sealing test, closing pressure test and flow test; the invention integrates and simplifies the testing method and simulates the testing of the actual loading application requirement.
Description
Technical Field
The invention relates to the field of overflow valve testing, in particular to a device and a method for testing an overflow valve.
Background
The relief valve is a pressure control valve. For controlling and managing the pressure downstream, and when the input pressure exceeds the setting pressure, the valve port is opened, and the pressure is output. When the inlet pressure drops to the point where the valve port closes, no pressure is output. The pressure relief overflow and protection effects are achieved on pipeline equipment. However, in actual operation, there is no unified testing method and device, so that there is no consistent testing means for the overflow valve. In the current testing method, only the opening pressure and the reverse sealing performance of the overflow valve can be tested, and the other can not be tested, so that the product has the defect of performance index in the process of leaving a factory and checking in a warehouse.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a testing device and method for an overflow valve.
The aim of the invention is realized by the following technical scheme: the device comprises a main air source, a first air supply branch and a second air supply branch, wherein the first air supply branch and the second air supply branch are communicated with the main air source; the tail ends of the first air supply branch and the second air supply branch are combined into a pipeline to form a fifth air supply branch;
the first air supply branch is sequentially provided with a first pressure regulating valve, a first plug door, a fifth plug door, an electromagnetic valve, a first pressure gauge and a measured overflow valve;
a third air supply branch and a fourth air supply branch are connected to a pipeline between the first plug door and the fifth plug door, and the other ends of the third air supply branch and the fourth air supply branch are connected to a pipeline between the fifth plug door and the electromagnetic valve; the third air supply branch is sequentially provided with a second plug door, a first cut-off device, a first air storage cylinder and a seventh plug door; a fourth plug door, a second air storage cylinder and a sixth plug door are sequentially arranged on the fourth air supply branch;
the second air supply branch is sequentially provided with a second pressure regulating valve, a third air storage cylinder and an electromagnetic valve;
the fifth air supply branch is provided with a second pressure gauge and is connected with three groups of tail end pipelines, the first group of tail end pipelines are connected with a water tank, the second group of tail end pipelines are connected with a fourth air storage cylinder, and the third group of tail end pipelines are connected with the fifth air storage cylinder.
Further, the electromagnetic valve on the first air supply branch is sequentially provided with a first normally closed electromagnetic valve with exhaust and a first normally closed electromagnetic valve without exhaust.
Further, the electromagnetic valve on the second air supply branch is sequentially provided with a second normally closed electromagnetic valve with air exhaust and a second normally closed electromagnetic valve without air exhaust.
Further, a pipeline between the first cut-off device and the first air storage cylinder on the third air supply branch is connected with an atmosphere-passing branch, and a second cut-off device and a third plug door are installed on the atmosphere-passing branch.
Further, an eighth plug door is arranged on the pipeline in front of the water tank.
Further, a ninth plug door is arranged on the pipeline in front of the fourth air storage cylinder.
Further, a tenth plug door is arranged on the pipeline in front of the fifth air cylinder.
Further, the diameter of the through hole of the first cut-off device is phi 0.6.
Further, the diameter of the through hole of the second cut-off device is phi 2.5.
The invention also provides a test method of the test device based on the overflow valve, which specifically comprises a pressure test, a sealing test, a reverse check sealing test, a reclosing pressure test and a flow test;
opening pressure test: and the main air source supplies air, the first plug door, the second plug door, the seventh plug door and the eighth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with and without exhaust air is electrified. Regulating the output pressure value of the first pressure regulating valve, intercepting gas through a first interception device through hole, and then increasing the pressure after the gas passes through a first gas storage cylinder, wherein the pressure of a first pressure gauge is recorded as the opening pressure when bubbles begin to be generated in a water tank;
opening a sealing test: the main air source supplies air, the first plug door and the fifth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified. And regulating the pressure of the first pressure regulating valve to a specified pressure, wherein the first pressure gauge and the second pressure gauge have the same pressure output. After the air pressure is stable, the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are powered off, so that the pressure reduction value of the first pressure gauge in the set time can be recorded;
reverse check seal test: the main air source supplies air, the eighth cock, the ninth cock and the tenth cock are closed, and the second normally closed electromagnetic valve with air exhaust and the second normally closed electromagnetic valve without air exhaust are electrified; and regulating the pressure of the second pressure regulating valve to the regulated pressure, and passing through the third air storage cylinder, wherein after the pressure output of the second pressure gauge is stable, the second normally closed electromagnetic valve with the exhaust and the second normally closed electromagnetic valve without the exhaust are powered off, and the pressure reduction value of the second pressure gauge in the regulated time is recorded.
And (3) performing a reclosing pressure test: the main air source supplies air, the first plug door, the fifth plug door, the seventh plug door and the ninth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; the pressure of the first pressure regulating valve is regulated to a specified pressure, and the first pressure gauge and the second pressure gauge have the same pressure output; after the air pressure is stable, the first plug door is closed, the third plug door is opened, and the air pressure is stopped and exhausted through the through hole of the second stopping device; the pressure gauge air pressure starts to drop, and the pressure when the second pressure gauge air pressure stops dropping is recorded as the closing pressure.
Flow test: the main air source supplies air, the first plug door, the fourth plug door, the sixth plug door and the tenth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; and regulating the pressure of the first pressure regulating valve to the regulated pressure, and enabling the regulated pressure to pass through the second air storage cylinder, recording the time for increasing the pressure of the second pressure gauge to the regulated value, and calculating the flow according to the relation formula of the pressure in the second air storage cylinder and the flow.
The invention has the beneficial effects that:
1. the integrated simplified test method simulates the test of the actual loading application requirement;
2. the test entry point covers all operating characteristics of the relief valve.
3. The standardized testing device and the standardized testing method improve testing efficiency.
4. The tested piece is connected with the device, and can realize product test only by replacing the fastening tool, and the operation is simple and convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
in the figure, a first pressure regulating valve 101, a second pressure regulating valve 102, a first plug 201, a second plug 202, a third plug 203, a fourth plug 204, a fifth plug 205, a sixth plug 206, a seventh plug 207, an eighth plug 208, a ninth plug 209, a tenth plug S210, a first normally-closed solenoid valve 301 with exhaust, a second normally-closed solenoid valve 303 with exhaust, a first normally-closed solenoid valve 302 without exhaust, a second normally-closed solenoid valve 304 without exhaust, a first cut-off device 401, a second cut-off device 402, a first air receiver 501, a second air receiver 502, a third air receiver 503, a fourth air receiver 504, a fifth air receiver 505, a water tank 506, a first pressure gauge 601, and a second pressure gauge 602.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
As shown in FIG. 1, the invention provides a testing device of an overflow valve, which comprises a main air source, a first air supply branch and a second air supply branch, wherein the first air supply branch and the second air supply branch are communicated with the main air source; the tail ends of the first air supply branch and the second air supply branch are combined into a pipeline to form a fifth air supply branch;
the first air supply branch is provided with a first pressure regulating valve 101, a first plug door 201, a fifth plug door 205, a first normally closed solenoid valve 301 with exhaust, a first normally closed solenoid valve 302 without exhaust, a first pressure gauge 601 and a tested overflow valve in sequence; the first normally closed solenoid valve 301 with exhaust and the first normally closed solenoid valve 302 without exhaust are used for controlling the on and off of gas, when the gas needs to be stopped, the pipeline gas between the first normally closed solenoid valve 301 with exhaust and the first normally closed solenoid valve 302 without exhaust can be discharged along with the first normally closed solenoid valve 301 with exhaust, which is equivalent to that the front section of the first normally closed solenoid valve 302 without exhaust has no input, and the interference to the downstream gas stop is avoided.
A third air supply branch and a fourth air supply branch are connected to the pipeline between the first plug door 201 and the fifth plug door 205, and the other ends of the third air supply branch and the fourth air supply branch are connected to the pipeline between the fifth plug door 205 and the first normally closed electromagnetic valve 301 with exhaust; a second plug door 202, a first cut-off device 401, a first air storage cylinder 501 and a seventh plug door 207 are sequentially arranged on the third air supply branch; a fourth plug door 204, a second air storage cylinder 502 and a sixth plug door 206 are sequentially installed on the fourth air supply branch; an atmosphere-passing branch is connected to a pipeline between the first cut-off device 401 and the first air storage cylinder 501 on the third air supply branch, and a second cut-off device 402 and a third plug door 203 are installed on the atmosphere-passing branch;
the second air supply branch is provided with a second pressure regulating valve 102, a third air receiver 503, a second normally closed electromagnetic valve with exhaust 303 and a second normally closed electromagnetic valve without exhaust 304 in sequence;
the fifth air supply branch is provided with a second pressure gauge 602 and is connected with three groups of end pipelines, the first group of end pipelines are connected with the water tank 506 through the eighth plug door 208, the second group of end pipelines are connected with the fourth air storage cylinder 504 through the ninth plug door 209, the third group of end pipelines are connected with the fifth air storage cylinder 505 through the tenth plug door 210, the functions of the air storage cylinders are consistent, and the air storage cylinders serve as loads for storing air and stabilizing the air flow rate.
The invention also provides a test method of the overflow valve, which comprises a pressure test, a sealing test, a reverse check sealing test, a reclosing pressure test and a flow test; the specific process is as follows;
opening pressure test: the main air source supplies air, the first cock 201, the second cock 202, the seventh cock 207 and the eighth cock 208 are opened, the rest of the shutters are closed, and the first normally closed solenoid valve 301 with air exhaust and the first normally closed solenoid valve 302 without air exhaust are electrified. The first pressure regulating valve 101 is regulated to output a pressure value, gas is intercepted by a first intercepting device 401 with a phi 0.6 through hole, the pressure slowly rises after passing through a first air storage cylinder 501, and the pressure of a first pressure gauge 601 is the opening pressure when the water tank 506 starts to generate bubbles.
Opening a sealing test: the main air source supplies air, the first cock 201 and the fifth cock 205 are opened, the rest of the cock is closed, and the first normally closed solenoid valve 301 with exhaust and the first normally closed solenoid valve 302 without exhaust are electrified. The pressure of the first pressure regulating valve 101 is regulated to a specified pressure, and the first pressure gauge 601 and the second pressure gauge 602 have the same pressure output. After the air pressure is stable, the first normally closed electromagnetic valve 301 with and without air exhaust and the first normally closed electromagnetic valve 302 without air exhaust are powered off, and then the pressure reduction value of the first pressure gauge 601 in the set time can be recorded.
Reverse check seal test: the main air source supplies air, the eighth cock 208, the ninth cock 209 and the tenth cock S210 are closed, and the second normally closed solenoid valve with exhaust 303 and the second normally closed solenoid valve without exhaust 304 are energized. The pressure of the second pressure regulating valve 102 is regulated to be the regulated pressure, the regulated pressure passes through the third air storage cylinder 503, after the pressure output of the second pressure gauge 602 is stabilized, the second normally closed electromagnetic valve 303 with the exhaust and the second normally closed electromagnetic valve 304 without the exhaust are powered off, and the pressure reduction value of the second pressure gauge 602 in the regulated time is recorded.
And (3) performing a reclosing pressure test: the main air source supplies air, the first cock 201, the fifth cock 205, the seventh cock 207 and the ninth cock 209 are opened, the rest of the shutters are closed, and the first normally closed solenoid valve 301 with air exhaust and the first normally closed solenoid valve 302 without air exhaust are electrified. The fourth gas reservoir 504 is used to act as a load and store gas and stabilize gas flow rate; the pressure of the first pressure regulating valve 101 is regulated to a specified pressure, and the first pressure gauge 601 and the second pressure gauge 602 have the same pressure output. After the air pressure is stabilized, the first plug door 201 is closed, the third plug door 203 is opened, and the air pressure is stopped and exhausted through the second stopping device 402 of the phi 2.5 through hole pair. The pressure gauge air pressure starts to drop, and the pressure recorded when the air pressure of the second pressure gauge 602 stops dropping is the closing pressure.
Flow test: the main air source supplies air, the first cock 201, the fourth cock 204, the sixth cock 206 and the tenth cock S210 are opened, the rest of the shutters are closed, and the first normally closed solenoid valve 301 with air exhaust and the first normally closed solenoid valve 302 without air exhaust are electrified. The fifth gas cylinder 505 is used to act as a load and store gas and stabilize the gas flow rate; the pressure of the first pressure regulating valve 101 is regulated to a prescribed pressure and passed through the second air receiver 502, the time taken for the pressure of the second pressure gauge 602 to increase to a prescribed value is recorded, and the pressure is regulated to a prescribed pressure by the formula q=ve× (Δp/P) 0 ) X (60/T), the flow rate can be calculated. Where Ve = volume (L), Δp = pressure drop (kPa), P 0 Standard atmospheric pressure (kPa), t=detection time (S);
the above-described embodiments are intended to illustrate the present invention, not to limit it, and any modifications and variations made thereto are within the spirit of the invention and the scope of the appended claims.
Claims (10)
1. The device is characterized by comprising a main air source, a first air supply branch and a second air supply branch, wherein the first air supply branch and the second air supply branch are communicated with the main air source; the tail ends of the first air supply branch and the second air supply branch are combined into a pipeline to form a fifth air supply branch;
the first air supply branch is sequentially provided with a first pressure regulating valve, a first plug door, a fifth plug door, an electromagnetic valve, a first pressure gauge and a measured overflow valve;
a third air supply branch and a fourth air supply branch are connected to a pipeline between the first plug door and the fifth plug door, and the other ends of the third air supply branch and the fourth air supply branch are connected to a pipeline between the fifth plug door and the electromagnetic valve; the third air supply branch is sequentially provided with a second plug door, a first cut-off device, a first air storage cylinder and a seventh plug door; a fourth plug door, a second air storage cylinder and a sixth plug door are sequentially arranged on the fourth air supply branch;
the second air supply branch is sequentially provided with a second pressure regulating valve, a third air storage cylinder and an electromagnetic valve;
the fifth air supply branch is provided with a second pressure gauge and is connected with three groups of tail end pipelines, the first group of tail end pipelines are connected with a water tank, the second group of tail end pipelines are connected with a fourth air storage cylinder, and the third group of tail end pipelines are connected with the fifth air storage cylinder.
2. The overflow valve testing device according to claim 1, wherein the electromagnetic valve on the first air supply branch is a first normally closed electromagnetic valve with air exhaust and a first normally closed electromagnetic valve without air exhaust in sequence.
3. The overflow valve testing device according to claim 1, wherein the electromagnetic valve on the second air supply branch is a second normally closed electromagnetic valve with air exhaust and a second normally closed electromagnetic valve without air exhaust in sequence.
4. The device for testing an overflow valve according to claim 1, wherein the pipeline between the first cut-off device and the first air reservoir on the third air supply branch is connected with an air passage, and the air passage is provided with a second cut-off device and a third plug door.
5. The overflow valve testing device according to claim 1, wherein an eighth plug door is installed on a pipeline in front of the water tank.
6. The device for testing an overflow valve according to claim 1, wherein a ninth plug is installed on the pipeline in front of the fourth air receiver.
7. The device for testing an overflow valve according to claim 1, wherein a tenth plug is installed on a pipeline in front of the fifth air receiver.
8. The overflow valve testing device of claim 1, wherein the first stop has a bore diameter of 0.6.
9. The overflow valve testing device of claim 4, wherein the second stop means has a bore diameter of 2.5.
10. A test method based on a test device of an overflow valve according to any of claims 1-9, characterized in that the test method comprises in particular a pressure test, a sealing test, a reverse check sealing test, a reclosing pressure test and a flow test;
opening pressure test: the main air source supplies air, the first plug door, the second plug door, the seventh plug door and the eighth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; regulating the output pressure value of the first pressure regulating valve, intercepting gas through a first interception device through hole, and then increasing the pressure after the gas passes through a first gas storage cylinder, wherein the pressure of a first pressure gauge is recorded as the opening pressure when bubbles begin to be generated in a water tank;
opening a sealing test: the main air source supplies air, the first plug door and the fifth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; the pressure of the first pressure regulating valve is regulated to a specified pressure, and the first pressure gauge and the second pressure gauge have the same pressure output; after the air pressure is stable, the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are powered off, so that the pressure reduction value of the first pressure gauge in the set time can be recorded;
reverse check seal test: the main air source supplies air, the eighth cock, the ninth cock and the tenth cock are closed, and the second normally closed electromagnetic valve with air exhaust and the second normally closed electromagnetic valve without air exhaust are electrified; regulating the pressure of the second pressure regulating valve to the regulated pressure, and passing through the third air storage cylinder, wherein after the pressure output of the second pressure gauge is stable, the second normally closed electromagnetic valve with air exhaust and the second normally closed electromagnetic valve without air exhaust are powered off, and the pressure reduction value of the second pressure gauge in the regulated time is recorded;
and (3) performing a reclosing pressure test: the main air source supplies air, the first plug door, the fifth plug door, the seventh plug door and the ninth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; the pressure of the first pressure regulating valve is regulated to a specified pressure, and the first pressure gauge and the second pressure gauge have the same pressure output; after the air pressure is stable, the first plug door is closed, the third plug door is opened, and the air pressure is stopped and exhausted through the through hole of the second stopping device; the pressure gauge air pressure starts to drop, and the pressure when the second pressure gauge air pressure stops dropping is recorded as the closing pressure;
flow test: the main air source supplies air, the first plug door, the fourth plug door, the sixth plug door and the tenth plug door are opened, the other plug doors are closed, and the first normally closed electromagnetic valve with exhaust and the first normally closed electromagnetic valve without exhaust are electrified; and regulating the pressure of the first pressure regulating valve to the regulated pressure, and enabling the regulated pressure to pass through the second air storage cylinder, recording the time for increasing the pressure of the second pressure gauge to the regulated value, and calculating the flow according to the relation formula of the pressure in the second air storage cylinder and the flow.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111657916.0A CN114323633B (en) | 2021-12-30 | 2021-12-30 | Testing device and method for overflow valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111657916.0A CN114323633B (en) | 2021-12-30 | 2021-12-30 | Testing device and method for overflow valve |
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| CN114323633A CN114323633A (en) | 2022-04-12 |
| CN114323633B true CN114323633B (en) | 2024-01-30 |
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2021
- 2021-12-30 CN CN202111657916.0A patent/CN114323633B/en active Active
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| EP0503819A2 (en) * | 1991-03-14 | 1992-09-16 | Dresser Industries Inc. | Method and apparatus for determining set pressure of pilot operated pressure relief valve |
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