CN110940511B - Performance testing system and method for vent valve - Google Patents
Performance testing system and method for vent valve Download PDFInfo
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- CN110940511B CN110940511B CN201911275473.1A CN201911275473A CN110940511B CN 110940511 B CN110940511 B CN 110940511B CN 201911275473 A CN201911275473 A CN 201911275473A CN 110940511 B CN110940511 B CN 110940511B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- 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
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Abstract
The invention discloses a performance test system of a vent valve, which is used for verifying the performance of the vent valve in a simulated use state; the performance testing system comprises: a frame body; the to-be-tested ventilation valve is arranged on the frame body; the driving mechanism is erected on the frame body, is connected with the vent valve to be tested, and is used for driving the vent valve to be tested to be opened and closed so as to simulate the use of the vent valve; and the loading oil cylinder is arranged on the frame body and is opposite to the valve port of the vent valve to be tested so as to provide loading force for the vent valve to be tested. The invention also discloses a performance test method of the vent valve. The invention can simulate the use state of the vent valve in the actual application scene so as to verify the performance of the vent valve.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to a performance test system and method of a vent valve.
Background
The structure of the ventilation valve is mainly composed of a valve, a driving device and an accessory, and the power generated by the driving device is transmitted to the valve by the accessory to realize the opening and closing of the valve. When the vent valve is put into use formally, the performance of the vent valve is required to be verified; a conventional vent valve test apparatus is generally composed of a test case, a hydraulic pump, and a hydraulic pump holder to check strength, airtightness, and operability of the vent valve. However, with the increasing development level, most of the conventional vent valve testing apparatuses independently perform performance verification on the vent valve, and cannot simulate the performance of the vent valve in a practical application scenario.
Disclosure of Invention
In view of the defects in the prior art, the present invention provides a performance testing system and method for a vent valve, which can simulate the usage status of the vent valve in a practical application scenario to verify the performance of the vent valve.
In order to achieve the above object, in a first aspect, embodiments of the present invention provide a performance testing system for a vent valve, which is used to verify the performance of the vent valve in a simulated use state; the performance testing system comprises:
a frame body;
the to-be-tested ventilation valve is arranged on the frame body;
the driving mechanism is erected on the frame body, is connected with the vent valve to be tested, and is used for driving the vent valve to be tested to be opened and closed so as to simulate the use of the vent valve;
and the loading oil cylinder is arranged on the frame body and is opposite to the valve port of the vent valve to be tested so as to provide loading force for the vent valve to be tested.
On the basis of the technical scheme, the to-be-tested vent valve is installed on the frame body through bolts.
On the basis of the above technical solution, the vent valve to be tested comprises:
the valve shell is provided with a supporting part with an opening, the supporting part is detachably arranged on the frame body, and the opening of the supporting part is matched with the opening of the frame body;
the screw transmission mechanism is arranged at one end of the valve shell far away from the abutting part; the spiral transmission mechanism comprises a bevel gear, a bevel gear nut and a screw rod, the bevel gear is connected with the driving mechanism, the bevel gear nut is meshed with the bevel gear, and the screw rod is connected with the bevel gear nut to form a screw rod pair;
the valve cover is fixedly connected with the free end of the screw rod, the surface of the sealing ring on the valve cover faces the abutting part, and the sealing ring is abutted against the abutting part.
On the basis of the technical scheme, the screw is a ball head screw, and the screw is fixedly connected with the valve cover through a first ball sleeve and a second ball sleeve.
On the basis of the technical scheme, the sealing ring is a T-shaped sealing ring.
On the basis of the technical scheme, the frame body comprises a ventilation valve mounting frame and a driving mechanism mounting frame which are fixedly arranged; the vent valve mounting frame comprises at least two horizontally arranged test plates and a plurality of vertically arranged support rods, and each support rod penetrates through the test plates; the driving mechanism mounting frame is positioned on the side surface of the to-be-tested ventilation valve mounting frame.
On the basis of the technical scheme, the loading oil cylinder is also connected with a direct-acting gas-liquid supercharger.
On the basis of the technical scheme, the driving mechanism comprises a driving part and a plurality of transmission shafts which are connected end to end, and two free ends of each transmission shaft are respectively connected with the driving part and the vent valve to be tested.
In a second aspect, an embodiment of the present invention further provides a performance testing method of a performance testing system based on the above vent valve, for verifying performance of the vent valve in a simulated use state; the performance test method comprises the following steps:
pre-mounting a vent valve to be tested on the frame body, connecting a driving mechanism and the vent valve to be tested, and aligning the loading direction of a loading oil cylinder to a valve port of the vent valve to be tested;
the driving mechanism is used for driving the to-be-tested vent valve to be opened and closed so as to test whether the to-be-tested vent valve runs stably or not, whether violent knocking sound or abnormal sound exists when the valve cover of the to-be-tested vent valve is opened and closed or not, and whether indentation generated by a sealing ring of the to-be-tested vent valve reaches the standard or not; the running time period of the vent valve to be tested and the maximum stroke of the valve cover of the vent valve to be tested;
the driving mechanism provides corresponding driving force according to the simulation condition of the vent valve to be tested, and the loading oil cylinder is used for applying loading force to the vent valve to be tested so as to test the tightness, the strength, the operability test and the reliability test of the vent valve to be tested.
On the basis of the technical scheme, the vent valve to be tested is installed on the frame body through bolts; and applying a loading force to the vent valve to be tested by using the loading oil cylinder so as to perform a bolt connection deformation coordination test.
Compared with the prior art, the invention has the advantages that:
(1) according to the performance test system of the vent valve, the vent valve to be tested is arranged on the frame body, and the drive mechanism is used for driving the vent valve to be tested to operate; in the movement process of the valve cover of the vent valve to be tested, whether the operation of the vent valve to be tested is stable, whether violent knocking sound or abnormal sound exists when the valve cover of the vent valve to be tested is opened and closed, and whether indentation generated by a sealing ring of the vent valve to be tested reaches the standard can be tested; the running time period of the vent valve to be tested, and the maximum stroke of the valve cover of the vent valve to be tested.
(2) In the invention, the frame body has simple structure and easy manufacture, and the frame body is provided with the vent valve to be tested and the loading oil cylinder; the loading oil cylinder is opposite to the vent valve to be tested and pressurizes the valve cover so as to realize tightness, strength, operability test and reliability test of the vent valve to be tested; meanwhile, the vent valve to be tested is installed on the frame body through bolts, and a bolt connection deformation coordination test can be realized; the driving mechanism connected with the vent valve to be tested can simulate the use state of the vent valve to be tested, and then the loading oil cylinder and the direct-acting gas-liquid supercharger are used for pressurizing the valve cover for testing, so that the technical bottleneck of the test of the vent valve on an actual warship is broken through.
Drawings
FIG. 1 is a schematic structural diagram of a performance testing system of a vent valve according to an embodiment of the present invention;
FIG. 2 is a schematic view of a vent valve according to an embodiment of the present invention;
in the figure: 1. a frame body; 11. a mounting rack of the vent valve to be tested; 111. a test plate; 112. a support bar; 12. a drive mechanism mounting bracket; 2. a drive mechanism; 21. a drive section; 211. a hydraulic motor; 212. a hand wheel; 22. a drive shaft; 23. a support; 3. a vent valve to be tested; 31. a valve housing; 311. a holding portion; 32. a screw drive mechanism; 321. a bevel gear; 322. a bevel gear nut; 323. a screw; 324. a first ball sleeve; 325. a second ball sleeve; 33. a valve cover; 330. a seal ring; 4. loading an oil cylinder; 5. a direct-acting gas-liquid supercharger; 6. a universal coupling is provided.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Examples
Referring to fig. 1 to 2, an embodiment of the present invention provides a performance testing system for a vent valve, which is used for verifying performance of the vent valve in a simulated use state; the performance testing system comprises:
a frame body 1;
a valve to be tested 3 mounted on the frame body 1;
the driving mechanism 2 is erected on the frame body 1, is connected with the to-be-tested ventilation valve 3, and is used for driving the to-be-tested ventilation valve 3 to be opened and closed so as to simulate the use of the ventilation valve;
and the loading oil cylinder 4 is arranged on the frame body 1 and is opposite to the valve port of the vent valve 3 to be tested so as to provide loading force for the vent valve 3 to be tested.
The embodiment of the invention performs the performance test on the vent valve 3 to be tested by using the driving mechanism 2 and the loading oil cylinder 4. The driving mechanism 2 is used for driving the to-be-tested vent valve 3 to be opened and closed so as to test whether the to-be-tested vent valve 3 runs stably or not, whether violent knocking sound or abnormal sound exists when the valve cover 33 of the to-be-tested vent valve 3 is opened and closed or not, and whether indentation generated by the sealing ring 330 of the to-be-tested vent valve 3 reaches the standard or not; the operating time period of the valve 3 to be ventilated, the maximum stroke of the valve cover 33 of the valve 3 to be ventilated. The driving mechanism 2 provides corresponding driving force according to the simulation condition of the vent valve 3 to be tested, and applies loading force to the vent valve 3 to be tested by using the loading oil cylinder 4 so as to test the tightness, strength, operability test and reliability test of the vent valve to be tested. It can be seen that the present embodiment is simple to test various performances of the vent valve 3 to be tested, and can simulate the state of the vent valve 3 to be tested in practical application scenarios.
In the embodiment of the invention, the loading oil cylinder 4 is arranged on the frame body 1, the application main body of the loading force is wide in material selection, the manufacturing cost is low, and the installation mode is convenient; the loading oil cylinder 4 is opposite to the vent valve 3 to be tested and pressurizes the valve cover 33, so that tightness, strength, operability tests and reliability tests of the vent valve 3 to be tested are realized; the driving mechanism 2 connected with the vent valve 3 to be tested can simulate the use state of the vent valve to be tested, and the technical bottleneck of the test of the vent valve on an actual warship is broken through. For example, the reliability test requires 5000 reciprocations of the vent valve 3 to be tested, wherein the valve cover is unloaded 2000 times, the valve cover 3000N is loaded 2000 times, and the valve cover 7100N is loaded 1000 times.
Further, the vent valve 3 to be tested is mounted on the frame body 1 by bolts. And applying a loading force to the vent valve 3 to be tested by using the loading oil cylinder 4 so as to perform a bolt connection deformation coordination test.
In particular, the valve to be ventilated 3 comprises:
the valve casing 31 is provided with an abutting part 311 with an opening, the abutting part 311 is detachably mounted on the frame body 1, and the opening of the abutting part 311 is matched with the opening of the frame body 1;
a screw drive mechanism 32 mounted on one end of the valve housing 31 remote from the holding portion 311; the screw transmission mechanism 32 comprises a bevel gear 321, a bevel gear nut 322 and a screw 323, the bevel gear 321 is connected with the driving mechanism 2, the bevel gear nut 322 is meshed with the bevel gear 321, and the screw 323 is connected with the bevel gear nut 322 to form a screw pair;
and the valve cover 33 is fixedly connected with the free end of the screw 323, and the surface of the valve cover 33, on which the sealing ring 330 is arranged, faces the abutting part 311 and is used for abutting the sealing ring 300 on the abutting part 311.
The working principle of the air vent valve 3 to be tested driven and controlled by the driving mechanism 2 is explained in detail below with the specific structure of the air vent valve 3 to be tested:
the driving mechanism 2 and the vent valve 3 to be tested are both arranged on the frame body 1 and are connected with the driving mechanism 2 and the vent valve 3 to be tested, the driving mechanism 2 is connected with the bevel gear 321, the driving mechanism 2 can drive the bevel gear 321 to rotate by rotating per se, the bevel gear nut 322 is meshed with the bevel gear 321, in particular, the bevel gear 321 is externally meshed, the bevel gear 321 drives the bevel gear nut 322 to rotate by rotating, the screw rod 323 is connected with the bevel gear nut 322 to form a screw rod pair, the bevel gear nut 322 drives the screw rod 323 to do linear motion by rotating, and the movement direction of the screw 323 is related to the rotation direction of the bevel gear nut 322, so that the screw 323 can make a reciprocating linear motion in the valve housing 31, thereby controlling the valve cover 33 fixedly connected with the screw transmission mechanism 32 to be close to or far away from the abutting part 311, when the screw 323 reaches the maximum stroke outwards, the sealing ring 330 on the valve cover 33 abuts against the abutting part 311, and an indentation is formed on the abutting part 311.
In this process, the performance test system of the vent valve provided by the embodiment of the invention can test whether the operation of the vent valve 3 to be tested is stable, whether violent knocking sound or abnormal sound exists when the valve cover 33 of the vent valve 3 to be tested is opened and closed, and whether the indentation generated by the sealing ring 330 of the vent valve 3 to be tested reaches the standard or not in the movement process of the valve cover 33; the operating time period of the valve 3 to be ventilated, the maximum stroke of the valve cover 33 of the valve 3 to be ventilated.
The abutting portion 311 is further connected to the body bolt of the valve housing 31, so that the valve cover 33 can be easily installed in the valve housing 31.
In order to improve the connection reliability of the screw 323 and the valve cover 33, the screw 323 is a ball head screw, and is fixedly connected with the valve cover 33 through a first ball sleeve 324 and a second ball sleeve 325. The cavity formed by splicing the first ball sleeve 324 and the second ball sleeve 325 just accommodates the ball head of the ball-head screw, wherein the diameter of the ball head is large in the middle and small at the two ends, so that the reliable connection between the screw 323 and the valve cover 33 can be ensured.
Specifically, the sealing ring 330 is a T-shaped sealing ring. The T-shaped sealing ring can be clamped in the valve cover 33 and is not easy to drop, and meanwhile, the width of the indentation is also easy to control, so that the indentation test is convenient.
Preferably, the frame body 1 comprises a fixedly arranged ventilation valve mounting frame 11 and a driving mechanism mounting frame 12; the vent valve mounting rack 11 comprises at least two horizontally arranged test boards 111 and a plurality of vertically arranged support rods 112, and each support rod 112 is arranged on the test board 111 in a penetrating manner; the driving mechanism mounting frame 12 is located at the side of the vent valve mounting frame 11 to be tested. The frame body 1 is simple in structure, easy to manufacture and convenient to install the to-be-tested vent valve 3, the loading oil cylinder 4 and the driving mechanism 2.
Further, the loading oil cylinder 4 is also connected with a direct-acting gas-liquid supercharger 5, and the direct-acting gas-liquid supercharger 5 is matched with the loading oil cylinder 4 for use, so that the maximum applicable loading force is increased.
As a preferable mode of the embodiment of the present invention, the driving mechanism 2 includes a driving portion 21 and a plurality of driving shafts 22 connected end to end, and both free ends of the driving shafts 22 are connected to the driving portion 21 and the vent valve 3 to be tested, respectively. The transmission shaft 22 is erected on the bracket 23. The driving part 21 drives the screw transmission mechanism 32 to move by using the transmission shaft 22, can realize the remote control of the screw transmission mechanism 32, and when a plurality of transmission shafts 22 are arranged, the transmission shafts 22 are supported by using the bracket 23, so that the transmission stability of the plurality of transmission shafts 22 is kept.
Specifically, the driving mechanism 2 is connected with the vent valve 3 to be tested through a universal joint 6. The connection of the performance test system can be ensured by connecting a plurality of transmission shafts 22 by using the universal coupling 6 or connecting the transmission shafts 22 and the vent valve 3 to be tested.
More specifically, the drive section (21) is a hydraulic motor (211) and/or a handwheel (212). Two power sources can be provided, and manual driving and operation of a hydraulic oil motor are realized.
The embodiment of the invention also provides a performance test method of the performance test system based on the vent valve, which is used for verifying the performance of the vent valve in a simulated use state; the performance test method comprises the following steps:
pre-installing a vent valve 3 to be tested on the frame body 1, connecting a driving mechanism 2 with the vent valve 3 to be tested, and aligning the loading direction of a loading oil cylinder 4 to the valve port of the vent valve 3 to be tested;
the driving mechanism 2 is used for driving the to-be-tested vent valve 3 to be opened and closed so as to test whether the to-be-tested vent valve 3 runs stably or not, whether violent knocking sound or abnormal sound exists when the valve cover 33 of the to-be-tested vent valve 3 is opened and closed or not, and whether indentation generated by the sealing ring 330 of the to-be-tested vent valve 3 reaches the standard or not; the running time period of the valve 3 to be tested, the maximum stroke of the valve cover 33 of the valve 3 to be tested;
the driving mechanism 2 provides corresponding driving force according to the simulation condition of the vent valve 3 to be tested, and applies loading force to the vent valve 3 to be tested by using the loading oil cylinder 4 so as to test the tightness, strength, operability test and reliability test of the vent valve to be tested.
In addition, the vent valve 3 to be tested is mounted on the frame body 1 through bolts; and applying a loading force to the vent valve 3 to be tested by using the loading oil cylinder 4 so as to perform a bolt connection deformation coordination test.
The embodiment not described in the embodiment of the present invention, which is also referred to as the embodiment of the performance testing system, is not described herein again.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (11)
1. A performance testing system of a vent valve is used for verifying the performance of the vent valve in a simulated use state; characterized in that the performance testing system comprises:
a frame body (1);
a to-be-tested vent valve (3) mounted on the frame body (1);
the driving mechanism (2) is erected on the frame body (1), is connected with the vent valve to be tested (3), and is used for driving the vent valve to be tested (3) to be opened and closed so as to simulate the use of the vent valve;
the loading oil cylinder (4) is arranged on the frame body (1) and is opposite to the valve port of the vent valve (3) to be tested so as to provide loading force for the vent valve (3) to be tested;
the valve (3) to be ventilated comprises:
the valve shell (31) is provided with a supporting part (311) with an opening, the supporting part (311) is detachably arranged on the frame body (1), and the opening of the supporting part (311) is matched with the opening of the frame body (1);
a screw drive mechanism (32) mounted on one end of the valve housing (31) remote from the holding portion (311); the screw transmission mechanism (32) comprises a bevel gear (321), a bevel gear nut (322) and a screw rod (323), the bevel gear (321) is connected with the driving mechanism (2), the bevel gear nut (322) is meshed with the bevel gear (321), and the screw rod (323) is connected with the bevel gear nut (322) to form a screw rod pair;
and the valve cover (33) is fixedly connected with the free end of the screw rod (323), and the surface of the valve cover (33) provided with the sealing ring (330) faces the abutting part (311) and is used for abutting the sealing ring (330) on the abutting part (311).
2. The system for testing the performance of a vent valve according to claim 1, wherein the vent valve (3) to be tested is mounted on the frame body (1) by bolts.
3. The vent valve performance testing system of claim 1, wherein the screw (323) is a ball-end screw fixedly connected to the valve cover (33) by a first ball sleeve (324) and a second ball sleeve (325).
4. The vent valve performance testing system of claim 1, wherein the seal ring (330) is a T-seal ring.
5. The vent valve performance testing system of claim 1, wherein the frame body (1) comprises a fixedly arranged vent valve mounting frame (11) and a driving mechanism mounting frame (12); the vent valve mounting frame (11) comprises at least two horizontally arranged test plates (111) and a plurality of vertically arranged support rods (112), and each support rod (112) penetrates through the test plates (111); the driving mechanism mounting frame (12) is positioned on the side surface of the to-be-tested ventilation valve mounting frame (11).
6. The performance test system of the vent valve according to claim 1, characterized in that the loading cylinder (4) is further connected with a direct-acting gas-liquid booster (5).
7. System for testing the performance of a vent valve according to claim 6, characterized in that said drive mechanism (2) comprises a drive portion (21) and a plurality of drive shafts (22) connected end to end, the two free ends of said drive shafts (22) being connected respectively to said drive portion (21) and to said vent valve (3) to be tested.
8. A performance test method of a performance test system based on the vent valve as claimed in any one of claims 1 to 7, which is used for verifying the performance of the vent valve in a simulated use state; the performance test method is characterized by comprising the following steps:
pre-installing a vent valve (3) to be tested on the frame body (1), connecting a driving mechanism (2) with the vent valve (3) to be tested, and aligning the loading direction of a loading oil cylinder (4) to the valve port of the vent valve (3) to be tested;
the driving mechanism (2) is used for driving the to-be-tested vent valve (3) to be opened and closed so as to test whether the to-be-tested vent valve (3) runs stably, whether violent knocking sound or abnormal sound exists when the valve cover (33) of the to-be-tested vent valve (3) is opened and closed, and whether indentation generated by the sealing ring (330) of the to-be-tested vent valve (3) meets the standard; the running time period of the vent valve (3) to be tested and the maximum stroke of a valve cover (33) of the vent valve (3) to be tested;
the driving mechanism (2) provides corresponding driving force according to the simulation condition of the vent valve (3) to be tested, and the loading oil cylinder (4) is used for applying loading force to the vent valve (3) to be tested so as to test the tightness, the strength, the operability test and the reliability test of the vent valve to be tested.
9. The performance testing method according to claim 8, characterized in that the vent valve (3) to be tested is mounted on the frame body (1) by means of bolts; and applying a loading force to the vent valve (3) to be tested by using the loading oil cylinder (4) so as to perform a bolt connection deformation coordination test.
10. A performance test method of a performance test system of a vent valve is used for verifying the performance of the vent valve in a simulated use state; characterized in that the performance testing system comprises:
a frame body (1);
a to-be-tested vent valve (3) mounted on the frame body (1);
the driving mechanism (2) is erected on the frame body (1), is connected with the vent valve to be tested (3), and is used for driving the vent valve to be tested (3) to be opened and closed so as to simulate the use of the vent valve;
the loading oil cylinder (4) is arranged on the frame body (1) and is opposite to the valve port of the vent valve (3) to be tested so as to provide loading force for the vent valve (3) to be tested;
the performance test method comprises the following steps:
pre-installing a vent valve (3) to be tested on the frame body (1), connecting a driving mechanism (2) with the vent valve (3) to be tested, and aligning the loading direction of a loading oil cylinder (4) to the valve port of the vent valve (3) to be tested;
the driving mechanism (2) is used for driving the to-be-tested vent valve (3) to be opened and closed so as to test whether the to-be-tested vent valve (3) runs stably, whether violent knocking sound or abnormal sound exists when the valve cover (33) of the to-be-tested vent valve (3) is opened and closed, and whether indentation generated by the sealing ring (330) of the to-be-tested vent valve (3) meets the standard; the running time period of the vent valve (3) to be tested and the maximum stroke of a valve cover (33) of the vent valve (3) to be tested;
the driving mechanism (2) provides corresponding driving force according to the simulation condition of the vent valve (3) to be tested, and the loading oil cylinder (4) is used for applying loading force to the vent valve (3) to be tested so as to test the tightness, the strength, the operability test and the reliability test of the vent valve to be tested.
11. The performance testing method according to claim 10, characterized in that the vent valve (3) to be tested is mounted on the frame body (1) by means of bolts; and applying a loading force to the vent valve (3) to be tested by using the loading oil cylinder (4) so as to perform a bolt connection deformation coordination test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275473.1A CN110940511B (en) | 2019-12-12 | 2019-12-12 | Performance testing system and method for vent valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275473.1A CN110940511B (en) | 2019-12-12 | 2019-12-12 | Performance testing system and method for vent valve |
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| CN110940511A CN110940511A (en) | 2020-03-31 |
| CN110940511B true CN110940511B (en) | 2021-08-03 |
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| KR20090113948A (en) * | 2008-04-29 | 2009-11-03 | 이상득 | The fluid valve test equipment |
| CN201795918U (en) * | 2010-07-30 | 2011-04-13 | 煤炭科学研究总院 | System for measuring and controlling high-flow safety valve |
| CN102252838B (en) * | 2011-06-03 | 2013-05-01 | 华东理工大学 | Valve seat testing device of float ball valve and testing method thereof |
| CN209542096U (en) * | 2017-12-15 | 2019-10-25 | 上海沃证机电技术服务有限公司 | A kind of detection device of valve |
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