CN114526877A - Check valve low-pressure-difference sealing performance detection system and detection method - Google Patents
Check valve low-pressure-difference sealing performance detection system and detection method Download PDFInfo
- Publication number
- CN114526877A CN114526877A CN202210162231.7A CN202210162231A CN114526877A CN 114526877 A CN114526877 A CN 114526877A CN 202210162231 A CN202210162231 A CN 202210162231A CN 114526877 A CN114526877 A CN 114526877A
- Authority
- CN
- China
- Prior art keywords
- check valve
- pressure
- test
- liquid
- stop valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 title claims description 21
- 239000007788 liquid Substances 0.000 claims abstract description 141
- 238000012360 testing method Methods 0.000 claims abstract description 119
- 238000000034 method Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention aims to provide a check valve low differential pressure tightness detection system and a check valve low differential pressure tightness detection method, wherein the detection system comprises a pressure pump, a test pipeline and a liquid collection tank communicated with the test pipeline; the pressure pump comprises a pressure gauge for displaying the current pressure value, the pressure pump is used for conveying liquid media to the test pipeline, the test pipeline comprises a stop valve I and a check valve, the stop valve I is communicated with the pressure pump, the outlet end of the check valve in the forward flowing direction is communicated with the stop valve I to be connected with the liquid media, and the inlet end of the check valve in the forward flowing direction is communicated with the liquid collecting tank. This detecting system carries out the low pressure difference leakproofness test of check valve through a test pipeline, and operating personnel only needs the switching of control force pump, stop valve one just can test, and the instrument that needs is small in quantity, easy operation.
Description
Technical Field
The invention belongs to the field of general mechanical processes, and particularly relates to a check valve low differential pressure tightness detection system and a check valve low differential pressure tightness detection method.
Background
The check valve is an automatic valve used on a one-way flow pipeline to prevent media from flowing backwards, and the check valve automatically opens or closes the valve depending on the pressure of the medium flowing in the pipeline. When the medium is positively circulated, the medium pressure is utilized to overcome the gravity of the valve clack and push the valve clack to open; when the medium is reversed, the valve clack is attached to the sealing surface by the medium pressure, and the valve clack is closed, so that the medium is prevented from reversely flowing backwards. In the prior art, only the tightness of the check valve under a high-pressure reverse medium is usually detected, so that the high-pressure tightness of the check valve is guaranteed. However, in a low-pressure pipeline, when the reverse medium pressure is not enough to make the valve clack and the sealing surface tightly attached, the medium is easy to reversely leak. Under some conditions, reverse leakage of the check valve will cause serious abnormal conditions, and therefore, it is necessary to check the tightness of the check valve at low differential pressure.
Chinese patent publication No. CN209055285U discloses a test apparatus for testing high-low pressure sealing of a valve, the apparatus includes a test pipeline and a low-pressure test pipeline connected to the test pipeline, the low-pressure test pipeline includes a plurality of branch sections, and a second branch section of the low-pressure test pipeline is used for controlling a low-pressure value entering a check valve. The device is used for measuring the pipeline and the low pressure test pipeline of high pressure leakproofness all to be connected with a test branch road, installs the control valve that a plurality of control liquid circulate or are used for the intercommunication pipeline on the test branch road. When a low-pressure test is carried out, an operator needs to process a test branch, if a plurality of control valves such as a pressure relief valve, a low-pressure water tank water inlet valve and a high-pressure switch valve on the test branch are closed, the operation is complicated, and the operator needs to repeatedly move the second branch up and down in the test to obtain a proper low-pressure value. This device therefore has the following drawbacks: in actual use, a lot of equipment is needed to complete the test, the operation is complicated, the adjustment is carried out many times by workers, and the operation steps are many.
Disclosure of Invention
The invention aims to provide a check valve low-pressure-difference tightness detection system and a check valve low-pressure-difference tightness detection method, which enable the check valve to be simple in tightness test operation under low pressure difference, few in operation steps and capable of detecting with few devices.
The technical purpose of the invention is realized by the following technical scheme:
a check valve low pressure difference tightness detection system comprises a pressure pump, a test pipeline and a liquid collection tank communicated with the test pipeline; the pressure pump comprises a pressure gauge for displaying the current pressure value, the pressure pump is used for conveying liquid medium to the test pipeline, the test pipeline comprises a first stop valve and a check valve, the first stop valve is communicated with the pressure pump, the outlet end of the check valve in the forward flowing direction is communicated with the first stop valve to be connected with the liquid medium, and the inlet end of the check valve in the forward flowing direction is communicated with the liquid collecting tank.
Therefore, when the check valve is subjected to a high-pressure sealing test or a low-pressure sealing test, the liquid medium needs to reversely enter the check valve from the outlet end of the check valve in the forward flowing direction. In the low-pressure sealing performance test, the flow rate of the liquid medium flowing into the check valve in the reverse direction is low, and the liquid medium cannot provide enough pressure for the valve clack to be attached to the sealing surface, so that a gap may exist between the valve clack and the sealing surface, and at the moment, the low-pressure liquid medium, namely the low-flow-rate liquid medium can leak in the reverse direction through the gap and reversely flow out from the inlet end of the check valve in the forward flowing direction to cause leakage.
In the present case, the first stop valve in this system communicates with the exit end of force pump and check valve respectively for liquid medium can reverse the inflow stop valve in, thereby test. The pressure pump is communicated with the liquid medium, after the first stop valve is opened, the pressure pump provides the low-pressure liquid medium for the test pipeline, the liquid medium enters the check valve from the inlet end of the check valve in the forward flowing direction, then reversely flows out from the inlet end of the check valve in the forward flowing direction, and finally is collected into the liquid collecting tank, and an operator can judge whether the check valve leaks under the low pressure difference according to the volume of the liquid medium in the liquid collecting tank. Because the pressure pump is provided with the pressure gauge, a pressure sensor does not need to be installed in the test pipeline, and the required equipment quantity is reduced. This detecting system carries out the low pressure difference leakproofness test of check valve through a test pipeline, and operating personnel only need control force pump, the switching of stop valve one just can test, and the instrument that needs is small in quantity, easy operation.
Preferably, the liquid collecting tank is a transparent tank with scales.
Therefore, an operator can directly read the volume of the liquid medium according to the scales on the liquid collecting tank, and the numerical value reading is convenient.
Preferably, the test device comprises a test bypass communicated with the pressure pump and the liquid collecting tank, wherein the height of the test bypass is lower than that of the test pipeline, and the test bypass comprises a second stop valve.
Therefore, the pressure pump needs to be debugged to a proper pressure value and then is connected with the test pipeline, and the phenomenon that the pipeline is damaged due to overlarge pressure and the test result is influenced is avoided. In the scheme, after the pressure pump is connected with the test bypass, the pressure value can be adjusted in advance in the test bypass. Particularly, stop valve one is closed, and stop valve two is opened, and liquid medium gets into after experimental bypass and enters into the liquid holding tank, treats that the force pump adjusts after suitable pressure, closes stop valve two, opens stop valve one, and liquid medium can test in letting in experimental pipeline. And the liquid medium with a proper pressure value can enter the test pipeline only by controlling the opening and closing of the first stop valve and the second stop valve, so that the disassembly and assembly processes are reduced. In this case, the liquid collecting tank is connected with experimental bypass detachable, and for guaranteeing the accuracy of experimental data, after liquid medium reaches suitable pressure, close stop valve two, liquid collecting tank is arranged and is gone out the liquid medium in the liquid collecting tank under the dismantlement, and the liquid collecting tank is emptied before the experiment promptly, when treating formal test, the liquid volume in the liquid collecting tank of rereading can. Because the liquid collecting tank is a transparent tank with scales, an operator can also choose not to disassemble the liquid collecting tank, the volume data a of the liquid medium in the liquid collecting tank before the pressure pump is connected with the test pipeline can be recorded, the volume value b of the liquid after the test can be recorded, and the volume of the liquid medium flowing out of the check valve in the test can be obtained through a-b. Because the height position of experimental bypass is less than experimental pipeline, and liquid medium is the low pressure, consequently liquid medium can not influence the experimental result from experimental bypass flow direction experimental pipeline.
Preferably, the check valve has a reducing pipe installed at both ends thereof.
Therefore, the pipe diameters of the two ports of the check valve may not be matched with the pipe diameter of the connecting pipeline, and reducing pipes are installed at the two ends of the check valve. The pipe diameters of two ends of the reducing pipe are different in size and are used for connecting pipelines with two different pipe diameters, so that the check valve is convenient to connect the pipelines; meanwhile, the reducing pipe enables one set of detection system to be matched with check valves with more calibers, and is not limited to a specific caliber.
Preferably, the liquid collection tank comprises a liquid outlet for the liquid medium to flow out.
Therefore, when the liquid medium in the liquid collection tank is excessive, the test can be continued after the liquid medium is discharged.
A detection method of a check valve low-pressure-difference tightness detection system comprises the following steps: s01, fixing the output pressure value: the pressure pump is communicated with the liquid medium, and the output pressure value of the pressure pump is adjusted until the output pressure value is fixed at a value A; s02, pipeline connection: respectively communicating the test pipeline with the pressure pump and the test pipeline with the liquid collecting tank through pipelines, and opening the first stop valve; s03, acquiring experimental data: starting timing after the first stop valve is opened, closing the first stop valve after time T, and recording the volume V of the liquid in the liquid collection tank; s04, data analysis: and obtaining the leakage rate B1 of the check valve according to the test time T, the liquid volume V and a calculation formula, and comparing the leakage rate B1 with the maximum leakage rate Bmax corresponding to the check valve.
Thus, in order to obtain a specific leakage rate of the check valve under a low pressure difference and obtain accurate test data, in step S04, the time T when the stop valve is opened and the volume V in the collection tank are recorded, the leakage rate B1, which is the volume of the liquid medium leaking from the check valve per unit time, is obtained by V/T, and B1 is compared with the maximum leakage rate Bmax corresponding to the check valve to determine whether the sealing performance of the check valve meets the requirements. The maximum leak rate Bmax can be obtained by referring to a data table in the prior art.
Preferably, a sealing performance detecting step is further provided between the step S01 and the step S02: and the pressure pump is communicated with the first stop valve through a pipeline, the first stop valve is closed, and the outflow condition of the liquid medium from the outlet of the first stop valve is observed.
From this, detect the leakproofness of stop valve one in order to guarantee closing stop valve one back, liquid medium no longer flows to the check valve, guarantees that the data in the liquid collection tank are accurate.
Preferably, the value of the value A is 0.7 MPa.
Therefore, when A is 0.7MPa, the pressure ratio of the liquid medium is lower, the valve clack of the check valve is not closed, the liquid medium cannot flow out, and the check valve has certain power, so that the liquid medium can flow in the test pipeline.
In conclusion, the invention has the following beneficial effects:
1. the detection system can perform the sealing test of the check valve under the low air pressure difference through a test pipeline, the required equipment is small in quantity, the test can be completed only by the pressure pump, the stop valve, the check valve and the liquid collecting tank, and the operation is simple.
2. The detection system further comprises a test bypass, the output pressure value can be adjusted to a fixed value in the test bypass in advance after the pressure pump is communicated with the test bypass, and then the liquid medium under the fixed pressure value is introduced into the test pipeline by closing the second stop valve and opening the first stop valve, so that the test is facilitated.
3. The liquid collecting tank is a transparent tank with scales, and operators can directly read liquid volume data when the test is convenient.
4. The detection system and the detection method can obtain leakage rate data of the check valve under low pressure difference, and judge whether the leakage rate of the check valve, namely the sealing performance of the check valve meets the requirement or not after comparing the leakage rate data with the maximum leakage rate specified in the prior art.
5. The check valve both ends are passed through reducing pipe and are connected with other pipe connections, easy to assemble check valve.
Description of the drawings:
FIG. 1 is a schematic view of the present embodiment;
FIG. 2 is a schematic flow diagram of the present invention;
fig. 3 is a schematic view of a check valve.
In the figure:
1. the device comprises a test pipeline 11, a first stop valve 12, a check valve 13, a reducing pipe 2, a pressure pump 3, a liquid collecting tank 4, a test bypass 41 and a second stop valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the invention, and it is not limited to the invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Specifically, when the check valve 1 is subjected to the high-pressure sealing test or the low-pressure sealing test, the liquid medium needs to enter the check valve 12 from the outlet end of the check valve 12 in the forward flow direction in the reverse direction, that is, the flow direction of the liquid medium in the test is opposite to the normal flow direction of the check valve 12. In the low-pressure sealing test, the liquid medium flowing into the check valve 12 in the reverse direction has a small flow rate, and the liquid medium cannot provide enough pressure for the valve clack to be attached to the sealing surface, so that a gap may exist between the valve clack and the sealing surface, and at the moment, the low-pressure liquid medium, namely the low-flow rate liquid medium, can leak in the reverse direction through the gap and reversely flow out from the inlet end of the check valve 12 in the forward flow direction, so that leakage is caused.
The pressure pump 2 in the detection system is used for supplying liquid medium to the test pipeline 1, and the first stop valve 11 controls the circulation of the liquid medium in the test pipeline 1 through the opening and closing valve. One end of the first stop valve 11 is communicated with the pressure pump 2, and the other end of the first stop valve is communicated with the outlet end of the check valve 12 in the forward flowing direction, so that the liquid medium can reversely flow into the stop valve 12, and the test is carried out. After the first stop valve 11 is opened, the pressure pump 2 provides low-pressure liquid medium for the test pipeline 1, the liquid medium enters the check valve 12 from the inlet end of the check valve 12 in the forward flowing direction, then reversely flows out from the inlet end of the check valve 12 in the forward flowing direction, and finally is collected in the liquid collection tank 3, and an operator can judge whether the check valve 12 leaks under low pressure difference according to the volume of the liquid medium in the liquid collection tank 3. Because the pressure pump 2 is provided with a pressure gauge, a pressure sensor does not need to be installed in the test pipeline 1, and the required equipment quantity is reduced. This detecting system carries out the low pressure difference leakproofness test of check valve 12 through a test pipeline 1, and operating personnel only need control force pump 2, the switching of stop valve 11 just can test, and the instrument that needs is small in quantity, easy operation. In the present embodiment, the check valve 12 is selected to be a swing check valve having a structure as shown in fig. 3.
The liquid collecting tank 3 is a transparent tank with scales, an operator can directly read the volume of the liquid medium according to the scales on the liquid collecting tank 3, and the numerical value is convenient to read. The liquid collecting tank 3 comprises a liquid outlet for the liquid medium to flow out, and when the liquid medium in the liquid collecting tank 3 is excessive, the liquid medium can be discharged through the liquid outlet and then the test is continued.
The detection system further comprises a test bypass 4 communicated with the pressure pump 2 and the liquid collecting tank 3, the height of the test bypass 4 is lower than that of the test pipeline 1, and the test bypass 4 comprises a second stop valve 41. Because the pressure pump 2 is connected with the test pipeline 1 after needing to be debugged to a proper pressure value, the pipeline is prevented from being damaged by overlarge pressure and the test result is prevented from being influenced. In the present embodiment, after the pressure pump 2 is connected to the test bypass 4, the pressure value may be previously adjusted in the test bypass 4. Specifically, stop valve 11 is closed, and stop valve two 41 is opened, and liquid medium gets into liquid collecting tank 3 after experimental bypass 4, waits that force pump 2 adjusts to suitable pressure after, closes stop valve two 41, opens stop valve 11, and liquid medium lets in can test in experimental pipeline 1. The liquid medium with a proper pressure value can enter the test pipeline 1 only by controlling the opening and closing of the first stop valve 11 and the second stop valve 41, so that the disassembling and assembling processes are reduced. In this embodiment, liquid collecting tank 3 is connected with 4 detachable of experimental bypasses, and for guaranteeing the accuracy of experimental data, after liquid medium reached suitable pressure, closing stop valve two 41, liquid collecting tank 3 was arranged and is gone out the liquid medium in liquid collecting tank 3 under the dismantlement, and empty liquid collecting tank 3 before the experiment promptly, when treating formal test, it can to read the liquid volume in liquid collecting tank 3 again. Because the liquid collecting tank 3 is a transparent tank with scales, an operator can also choose not to disassemble the liquid collecting tank 3, the volume data a of the liquid medium in the liquid collecting tank 3 before the pressure pump 2 is connected with the test pipeline 1 can be recorded, the volume value b of the liquid after the test can be recorded, and the volume of the liquid medium flowing out of the check valve 12 in the test can be obtained through a-b. Because the height position of test bypass 4 is less than test pipeline 1, and liquid medium is the low pressure, consequently liquid medium can not influence the experimental result from test bypass 4 flow direction test pipeline 1.
The pipe diameters of two ports of the check valve 12 may not be matched with the pipe diameters of the connecting pipes, so that the reducing pipes 13 are installed at two ends of the check valve 12, and the pipe diameters of two ends of the reducing pipes 13 are different for connecting the pipes with two different pipe diameters, so that the check valve 12 is convenient to connect the pipes; meanwhile, the reducing pipe 13 enables one set of detection system to be matched with check valves 12 with more calibers, and is not limited to a specific caliber.
As shown in fig. 2, a method for detecting a check valve low pressure difference tightness detecting system includes the following steps: s01, fixing the output pressure value: the pressure pump 2 is communicated with the liquid medium, and the output pressure value of the pressure pump 2 is adjusted until the output pressure value is fixed at a value A; s02, pipeline connection: respectively communicating the test pipeline 1 with the pressure pump 2 and the test pipeline 1 with the liquid collecting tank 3 through pipelines, and opening the first stop valve 11; s03, acquiring experimental data: starting timing after the first stop valve 11 is opened, closing the first stop valve 11 after time T, and recording the volume V of the liquid in the liquid collection tank 3; s04, data analysis: and obtaining the leakage rate B1 of the check valve according to the test time T, the liquid volume V and a calculation formula, and comparing the leakage rate B1 with the maximum leakage rate Bmax corresponding to the check valve.
In order to obtain the specific leakage rate of the check valve 12 under the low pressure difference and obtain accurate test data, in step S04, the time T for opening the first stop valve 11 and the volume V in the collection tank 3 are recorded, the leakage rate B1, which is the volume of the liquid medium leaking from the check valve 12 per unit time, is obtained according to V/T, and B1 is compared with the maximum leakage rate Bmax corresponding to the check valve 12 to determine whether the sealing performance of the check valve 12 meets the requirement. The maximum leak rate Bmax can be obtained by referring to a data table in the prior art. The value of the value A is 0.7Mpa, and under the value, the pressure ratio of the liquid medium is lower, so that the valve clack of the check valve 12 cannot be closed to cause the liquid medium to flow out, but certain power is provided, and the liquid medium can flow in the test pipeline.
There is also a sealability detection step between step S01 and step S02: and (3) communicating the pressure pump 2 with the first stop valve 11 through a pipeline, closing the first stop valve 11, and observing the outflow condition of the liquid medium from the outlet of the first stop valve 11. From this, detect the leakproofness of stop valve 11 in order to guarantee after closing stop valve 11, liquid medium no longer flows to check valve 12, guarantees that the data in the liquid holding tank 3 is accurate.
Claims (8)
1. The check valve low-pressure-difference tightness detection system comprises a pressure pump (2), and is characterized by also comprising a test pipeline (1) and a liquid collection tank (3) communicated with the test pipeline (1);
the pressure pump (2) comprises a pressure gauge for displaying the current pressure value, and the pressure pump (2) is used for conveying a liquid medium to the test pipeline (1);
test pipeline (1) contains stop valve (11) and check valve (12), stop valve (11) with force pump (2) intercommunication, the exit end of check valve (12) forward direction of flow with stop valve (11) intercommunication is in order to insert liquid medium, the entrance point of check valve (12) forward direction of flow with liquid holding tank (3) intercommunication.
2. The check valve low pressure difference tightness detection system according to claim 1, characterized in that the liquid collection tank (3) is a transparent tank with scales.
3. The check valve low pressure difference tightness detection system according to claim 2, characterized by comprising a test bypass (4) communicated with the pressure pump (2) and the liquid collection tank (3), wherein the height of the test bypass (4) is lower than that of the test pipeline (1), and the test bypass (4) comprises a second stop valve (41).
4. The check valve low pressure difference tightness detection system according to claim 1, wherein a reducing pipe (13) is installed at both ends of the check valve (12).
5. A check valve low pressure differential tightness detection system according to claim 1, characterized in that said liquid collection tank (3) comprises a liquid outlet for the outflow of a liquid medium.
6. A method of testing a check valve low differential pressure leak tightness test system according to claim 1, comprising the steps of:
s01, fixing the output pressure value: the pressure pump (2) is communicated with a liquid medium, and the output pressure value of the pressure pump (2) is adjusted until the output pressure value is fixed at a value A;
s02, pipeline connection: respectively communicating the test pipeline (1) with the pressure pump (2) and the test pipeline (1) with the liquid collecting tank (3) through pipelines, and opening the first stop valve (11);
s03, acquiring experimental data: starting timing after the first stop valve (11) is opened, closing the first stop valve (11) after time T, and recording the volume V of the liquid in the liquid collection tank (3);
s04, data analysis: and obtaining the leakage rate B1 of the check valve according to the test time T, the liquid volume V and a calculation formula, and comparing the leakage rate B1 with the maximum leakage rate Bmax corresponding to the check valve.
7. The method as claimed in claim 6, wherein there is a sealing detection step between the step S01 and the step S02: and (3) communicating the pressure pump (2) with the first stop valve (11) through a pipeline, closing the first stop valve (11), and observing the outflow condition of the liquid medium from the outlet of the first stop valve (11).
8. The method as claimed in claim 6, wherein the value of A is 0.7 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210162231.7A CN114526877A (en) | 2022-02-22 | 2022-02-22 | Check valve low-pressure-difference sealing performance detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210162231.7A CN114526877A (en) | 2022-02-22 | 2022-02-22 | Check valve low-pressure-difference sealing performance detection system and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114526877A true CN114526877A (en) | 2022-05-24 |
Family
ID=81623894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210162231.7A Pending CN114526877A (en) | 2022-02-22 | 2022-02-22 | Check valve low-pressure-difference sealing performance detection system and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114526877A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235680A (en) * | 1993-02-10 | 1994-08-23 | Kiyohara Masako | Method and equipment for testing check valve |
| CN106768723A (en) * | 2017-01-13 | 2017-05-31 | 平湖康弗莱尔汽车发动机系统有限公司 | Air flue check valve flow and device for detecting sealability |
| CN207894564U (en) * | 2018-03-23 | 2018-09-21 | 王力军 | A kind of swing check valve package seal checker |
| CN109297641A (en) * | 2018-11-30 | 2019-02-01 | 博纳斯威阀门股份有限公司 | A kind of experimental rig for examining valve high-low pressure to seal |
| CN210741775U (en) * | 2019-08-09 | 2020-06-12 | 宁德时代新能源科技股份有限公司 | Air tightness detection device |
| CN211877329U (en) * | 2020-05-18 | 2020-11-06 | 东一阀门制造(南通)有限公司 | Safe check valve test system |
| CN213239375U (en) * | 2020-09-21 | 2021-05-18 | 中核苏阀科技实业股份有限公司 | Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve |
-
2022
- 2022-02-22 CN CN202210162231.7A patent/CN114526877A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235680A (en) * | 1993-02-10 | 1994-08-23 | Kiyohara Masako | Method and equipment for testing check valve |
| CN106768723A (en) * | 2017-01-13 | 2017-05-31 | 平湖康弗莱尔汽车发动机系统有限公司 | Air flue check valve flow and device for detecting sealability |
| CN207894564U (en) * | 2018-03-23 | 2018-09-21 | 王力军 | A kind of swing check valve package seal checker |
| CN109297641A (en) * | 2018-11-30 | 2019-02-01 | 博纳斯威阀门股份有限公司 | A kind of experimental rig for examining valve high-low pressure to seal |
| CN210741775U (en) * | 2019-08-09 | 2020-06-12 | 宁德时代新能源科技股份有限公司 | Air tightness detection device |
| CN211877329U (en) * | 2020-05-18 | 2020-11-06 | 东一阀门制造(南通)有限公司 | Safe check valve test system |
| CN213239375U (en) * | 2020-09-21 | 2021-05-18 | 中核苏阀科技实业股份有限公司 | Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7454956B1 (en) | Heat exchanger leak detection using mass gas flow metering | |
| US5152167A (en) | Method and apparatus for measuring leakage in a fluid system | |
| CN107781155B (en) | Test macro, durability test method and performance test methods | |
| CN104359661A (en) | Universal valve performance test device | |
| RU2743735C1 (en) | Pressure control device and safety control of safety valve and method of operation thereof | |
| CN106840552A (en) | A kind of quick action emergency valve overall calibration system | |
| RU2561110C2 (en) | Control device for section of powered support in production face of mine | |
| CN110646152A (en) | Pressure test system and method for plastic pipe acceptance inspection | |
| CN105181271B (en) | Bleeder and test method for line leakage system performance testing | |
| CN109029943B (en) | Two-loop check valve test device | |
| CN103573752B (en) | On-line air content detection device for hydraulic system | |
| CN114526877A (en) | Check valve low-pressure-difference sealing performance detection system and detection method | |
| CN113101735A (en) | Water damage protection device, water treatment installation and method for operating said device | |
| CN203688181U (en) | Internal leakage internal blocking detection device | |
| CN203606093U (en) | Circulation characteristic detector for micro-channel heat exchanger | |
| RU2758876C1 (en) | Method for determining level of leakage through leaky gate of ball valve of shut-off and control valve in operating mode and device for its implementation | |
| CN210774572U (en) | Pressure test system for acceptance inspection of plastic pipes | |
| CN205388531U (en) | Large -scale aqueous vapor solenoid valve detecting system that synthesizes | |
| JP4254961B2 (en) | Overflow check valve operation inspection method | |
| CN214467893U (en) | Power device for receiving and dispatching balls through small-caliber simulation pipeline | |
| CN112414700A (en) | Electromagnetic valve performance testing device and testing method | |
| CN210981374U (en) | Flow constant temperature and pressure measuring device for parts | |
| CN110514433A (en) | A kind of automatic control test bed equipment detecting the full performance of valve | |
| KR890004368B1 (en) | Checking of leakage | |
| KR20020024927A (en) | Filter tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |