CN211121353U - Airtight flow and electrical performance test platform of high-pressure integrated cylinder valve - Google Patents
Airtight flow and electrical performance test platform of high-pressure integrated cylinder valve Download PDFInfo
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- CN211121353U CN211121353U CN201922346813.7U CN201922346813U CN211121353U CN 211121353 U CN211121353 U CN 211121353U CN 201922346813 U CN201922346813 U CN 201922346813U CN 211121353 U CN211121353 U CN 211121353U
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Abstract
The utility model discloses an airtight flow and electrical property test platform of high-pressure integrated cylinder valve, including high-pressure storage tank system, low pressure storage tank system, pressure release unloading system, cylinder valve test fixture and electrical property test system, high-pressure storage tank system includes high-pressure storage tank, air intake filter and pneumatic valve one, low-pressure storage tank system includes low-pressure storage tank, mass flowmeter, check valve and ball valve one, pressure release unloading system includes pneumatic valve two, needle valve one and the trachea of releasing, cylinder valve test fixture includes test fixture, manometer one and ball valve two, ball valve two is connected with main road trachea, the trachea of releasing, pneumatic valve one and ball valve are connected through the four-way pipe between, be provided with ball valve three and pressure transmitter on the main road trachea, electrical property test system includes P L C control panel and electric connector, the utility model discloses a plurality of test capacities such as airtight test, flow test and electrical property test need not to switch over test equipment repeatedly, reduce test consuming time effectively.
Description
Technical Field
The utility model relates to a test platform's technical field especially relates to an airtight flow and electrical property test platform.
Background
The high-pressure hydrogen integrated cylinder valve is arranged on a hydrogen storage cylinder of a fuel cell automobile and used for controlling the on-off of hydrogen in the hydrogen storage cylinder. Because the cylinder valve integrates a plurality of functional components, when the delivery test is carried out, a plurality of tests such as high and low pressure, flow, electrical property and the like are required, so that the test time is long.
The existing testing devices for the cylinder valves are mutually independent, so that multiple tests are completed one by one, the testing time is long, the testing procedures are multiple, the efficiency is low, and the problems to be improved exist.
SUMMERY OF THE UTILITY MODEL
To the problem of the aforesaid production, an object of the utility model is to provide an airtight flow and electrical property test platform of high pressure integrated cylinder valve.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
an airtight flow and electrical performance testing platform of a high-pressure integrated cylinder valve comprises a high-pressure storage tank system, a low-pressure storage tank system, a pressure relief and emptying system, a cylinder valve testing tool and an electrical performance testing system, wherein the high-pressure storage tank system comprises a high-pressure storage tank, an air inlet filter and a first pneumatic valve which are sequentially connected through an air pipe, the low-pressure storage tank system comprises a low-pressure storage tank, a mass flowmeter, a one-way valve and a first ball valve which are sequentially connected through the air pipe, the pressure relief and emptying system comprises a second pneumatic valve, a first needle valve and a second relief air pipe, the second pneumatic valve is arranged on the relief air pipe, the first needle valve is connected with the second pneumatic valve in parallel through the air pipe, the cylinder valve testing tool comprises a testing tool, a first pressure gauge and a second ball valve, an air inlet of the testing tool is sequentially connected with the first pressure gauge and the second ball valve through the air pipe, an inlet end of the second ball valve is connected with one end of the first pneumatic pipe, the main air pipe, the first pneumatic valve and the ball valve are connected through a four-way pipe, a third pressure transmitter and a pressure transmitter are arranged on the air pipe L, the electrical performance testing system comprises a P L C controller and an electrical connector, the P controller, and an electrical connector, and.
The first pneumatic valve and the second pneumatic valve are respectively connected with two electromagnetic valves, the two electromagnetic valves respectively control the first pneumatic valve and the second pneumatic valve, and the two electromagnetic valves are both connected with the P L C control panel.
The airtight flow and electrical performance testing platform for the high-voltage integrated cylinder valve is characterized in that a plurality of cylinder valve testing tools are arranged, and the plurality of cylinder valve testing tools are connected with the main branch air pipe through the branch air pipe.
The airtight flow and electrical property test platform of the high-pressure integrated cylinder valve is characterized in that a first safety pressure release valve is installed on an air pipe between the air inlet filter and the first pneumatic valve, and a second safety pressure release valve is installed on an air pipe between the mass flow meter and the one-way valve.
Foretell airtight flow and electrical property test platform of integrated cylinder valve of high pressure, wherein, the air inlet of high-pressure storage tank is connected with needle valve two through the trachea, needle valve two is kept away from with the tracheal one end of a dozen pressure on the trachea of high-pressure storage tank one side is connected, install needle valve three on the pipe of suppressing.
Preferably, the other end of the pressurizing air pipe is connected with a high-pressure hose.
The airtight flow and electrical property test platform of foretell high pressure integrated cylinder valve, wherein, the air inlet of low pressure storage tank has connected gradually relief pressure valve and needle valve four through the trachea, all install manometer two on the trachea of the both sides of low pressure storage tank.
The platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve is characterized in that the direction of the one-way valve is from the mass flow meter to the ball valve I.
The airtight flow and electrical property test platform of foretell high pressure integrated cylinder valve, wherein, high pressure storage tank system still includes needle valve five, needle valve five sets up with pneumatic valve a parallel through the trachea.
The airtight flow and electrical property test platform of the high-pressure integrated cylinder valve is characterized in that a second pressure reducing valve is arranged at an air outlet in the high-pressure storage tank.
The utility model discloses owing to adopt above-mentioned technique, make it compare the positive effect that has with prior art and be:
1. the utility model discloses an airtight flow and electrical property test platform of high-pressure integrated cylinder valve have a plurality of test capacities such as airtight test, flow test and electrical property test, need not to switch test equipment repeatedly, and it is consuming time to reduce the test effectively.
2. The utility model discloses an airtight flow and electrical property test platform of high pressure integrated cylinder valve are equipped with a plurality of cylinder valve test fixture, can carry out the capability test of a plurality of cylinder valves according to the demand.
3. The utility model discloses an airtight flow and electrical property test platform of high-pressure integrated cylinder valve fills 90MPa pressure to high-pressure storage tank through the booster compressor, and export pressure 43.8MPa is stabilized in the relief valve regulation that rethread high-pressure storage tank was furnished with, only need open the pneumatic valve like this and just can directly obtain the test pressure of high-pressure integrated cylinder valve, reduce effectively and beat the time.
4. The utility model discloses an airtight flow and electrical property test platform of high pressure integrated cylinder valve fills 4 ~ 5Mpa flow test pressure through the relief pressure valve earlier on to the low pressure storage tank, can prepare test pressure fast, reduces flow test preparation time.
5. The utility model discloses an airtight flow of high pressure integrated cylinder valve and electrical property test platform's low pressure storage tank system when aerifing to high pressure integrated cylinder valve, mass flowmeter shows the flow value in the trachea in real time to gather the flow value at 2 MPa.
6. The utility model discloses an airtight flow and electrical property test platform's of high pressure integrated cylinder valve P L C control panel separates with test fixture, improves the test security, and pneumatic valve one and pneumatic valve two are opened through the pneumatic mode control of two solenoid valves respectively, are applicable to the high pressure hydrogen dielectric test.
7. The utility model discloses an airtight flow and electrical property test platform of high pressure integrated cylinder valve are provided with safety relief valve one and safety relief valve two on high-pressure storage tank system, low pressure storage tank system respectively, can effectively avoid the safety risk that the pressure is too high to lead to.
Drawings
Fig. 1 is a schematic view of an airtight flow and electrical performance testing platform of a high-pressure integrated cylinder valve according to the present invention;
fig. 2 is a cross-sectional view of the testing tool of the present invention;
fig. 3 is a schematic diagram of an electrical performance testing system of the present invention.
The reference numbers of the high-pressure storage tank system 1, the high-pressure storage tank system 11, the high-pressure storage tank 12, the air inlet filter 13, the first pneumatic valve 14, the first safety relief valve 15, the second needle valve 16, the pressurizing air pipe 17, the third needle valve 18, the fifth needle valve 2, the low-pressure storage tank system 21, the low-pressure storage tank 22, the mass flowmeter 23, the check valve 23, the ball valve 24, the first ball valve 25, the second safety relief valve 26, the first relief valve 27, the needle valve four 28, the second pressure gauge 3, the pressure relief and emptying system 31, the second pneumatic valve 32, the first needle valve 33, the relief air pipe 4, the bottle valve testing tool 41, the testing tool 42, the first pressure gauge 43, the second ball valve 44, the main air pipe 45, the third ball valve 46, the pressure transmitter 47, the shunt air pipe 5, the electrical performance testing system 51, the P L C control panel 52, the electrical connector 6, the electromagnetic valve 7 and the high-pressure integrated bottle valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is a schematic view of an airtight flow and electrical performance testing platform of a high-pressure integrated cylinder valve according to the present invention; fig. 2 is a cross-sectional view of the testing tool of the present invention; fig. 3 is a schematic diagram of an electrical performance testing system of the present invention. Referring to fig. 1, 2 and 3, a platform for testing the gas-tight flow and electrical performance of a high-pressure integrated cylinder valve according to a preferred embodiment is shown, comprising: high-pressure storage tank system 1, high-pressure storage tank system 1 includes the high-pressure storage tank 11 that connects gradually through the trachea, filter 12 and pneumatic valve 13 admit air, be provided with relief pressure valve two in the high-pressure storage tank 11, outside air supply fills 90 MPa's gas to high-pressure storage tank 11 through the booster compressor, adjust to outlet pressure 43.8MPa through relief pressure valve two for provide stable test pressure, filter 12 is arranged in impurity and the moisture of filtered gas, pneumatic valve 13 is used for controlling the gas circulation in the high-pressure storage tank system 1.
In addition, as a preferred embodiment, the platform for testing the airtight flow and the electrical performance of the hvi bottle valve further comprises: low pressure storage tank system 2, low pressure storage tank system 2 includes the low pressure storage tank 21 that connects gradually through the trachea, mass flow meter 22, check valve 23 and ball valve 24, the air inlet of low pressure storage tank 21 has connected gradually relief pressure valve 26 and needle valve four 27 through the trachea, all install manometer two 28 on the trachea of low pressure storage tank 21's both sides, when carrying out the flow test, pneumatic valve 13 is closed, the stable 4 ~ 5 MPa's of filling of external air source to low pressure storage tank 21 through relief pressure valve 26, with the flow test pressure of guaranteeing high-pressure integrated cylinder valve 7, mass flow meter 22 acquires the real-time flow data when the inherent 2MPa pressure of trachea through acquisition element, when the test pressure in low pressure storage tank 21 is not enough, carry out the tonifying qi through the external air source, ball valve 24 is used for controlling the gas circulation in the low pressure storage tank system 2.
In addition, as a preferred embodiment, the platform for testing the airtight flow and the electrical performance of the hvi bottle valve further comprises: pressure release unloading system 3, pressure release unloading system 3 includes pneumatic valve two 31, needle valve 32 and the trachea 33 of releasing, the trachea 33 and high-pressure storage tank system 1 of releasing, low pressure storage tank system 2 homogeneous phase intercommunication, pneumatic valve two 31 sets up on the trachea 33 of releasing, needle valve 32 is through trachea and the parallelly connected setting of pneumatic valve two 31, pneumatic valve two 31 are used for the test gas in evacuation high-pressure storage tank system 1 and the low pressure storage tank system 2, when pneumatic valve two 31 can't start, the test gas of the interior trachea 33 of releasing is discharged to manual start needle valve 32.
Moreover, as a preferred embodiment, the platform for testing the airtight flow and the electrical performance of the hvi bottle valve further comprises: the cylinder valve testing tool 4, the cylinder valve testing tool 4 comprises a testing tool 41, a first pressure gauge 42 and a second ball valve 43, an air inlet of the testing tool 41 is sequentially connected with the first pressure gauge 42 and the second ball valve 43 through an air pipe, an air outlet of the testing tool 41 is inserted into a high-pressure integrated cylinder valve 7 to be tested, the second ball valve 43 is used for controlling the opening and closing of the cylinder valve testing tool 4, the first pressure gauge 42 is used for confirming the air pressure in the air pipe when the testing tool 41 and the high-pressure integrated cylinder valve 7 are disassembled, an inlet end of the second ball valve 43 is connected with one end of a main air pipe 44, the main air pipe 44, a discharge air pipe 33, a first pneumatic valve 13 and a first ball valve 24 are connected through a four-way pipe (not shown in the figure), the main air pipe 44 is used for respectively conveying the air in the high-pressure storage tank system 1 and the low-pressure storage tank system 2 to the cylinder valve testing tool 4 to, the third ball valve 45 is used for controlling the gas circulation on the main gas pipe 44, and the pressure transmitter 46 is used for collecting the gas pressure value in the main gas pipe 44.
In addition, as a preferred embodiment, the airtight flow and electrical performance testing platform of the high-voltage integrated cylinder valve further comprises an electrical performance testing system 5, the electrical performance testing system 5 is arranged at one side of the cylinder valve testing tool 4, the electrical performance testing system 5 comprises a P L C control panel 51 and an electrical connector 52, the mass flow meter 22, the pressure transmitter 46 and the electrical connector 52 are all connected with the P L C control panel 51, the pressure transmitter 46 transmits the acquired gas pressure value in the main gas pipe 44 to the P L C control panel 51, when the pressure transmitter 46 acquires that the gas pressure value in the main gas pipe 44 is 2MPa, the P L C control panel 51 controls the mass flow meter 22 to acquire the flow data of the gas pipe in the low-voltage storage tank system 2 and transmits the flow data of the gas pipe in the low-voltage storage tank system 2 at 2MPa pressure to the P L C control panel 51, one end of the electrical connector 52 far away from the P L C control panel 51 is connected with the high-voltage integrated cylinder valve 7, an NTC (Negative Temperature CoeffiCient, a NTC (Negative Temperature CoeffiCient) is integrated with a NTC (NTC) integrated cylinder valve) integrated with a NTC switch, a Temperature sensor (7) and a NTC sensor (Negative Temperature CoeffiCient) is arranged on the integrated cylinder valve) and a Temperature sensor (Negative Temperature sensor) is arranged on the integrated cylinder valve) and a NTC switch) for detecting device (not shown in the integrated cylinder valve 7) and displaying normal Temperature detecting device, and detecting device, the integrated cylinder valve) and displaying the integrated cylinder valve) by a Temperature detecting device (not shown in the integrated cylinder valve) and displaying device, the integrated cylinder valve) and displaying.
Further, as a preferred embodiment, the platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve further comprises two electromagnetic valves 6, the first pneumatic valve 13 and the second pneumatic valve 31 are respectively connected with the two electromagnetic valves 6, the two electromagnetic valves 6 respectively control the opening and closing of the first pneumatic valve 13 and the second pneumatic valve 31 by controlling the inlet and outlet of the driving air source, so as to play a role of electrical isolation and improve the testing safety, the two electromagnetic valves 6 are both connected with the P L C control panel 51, and the P L C control panel 51 controls the opening or closing of the two electromagnetic valves 6.
The above is merely an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The utility model discloses still have following embodiment on above-mentioned basis:
the utility model discloses a in the further embodiment, bottle valve test fixture 4 is provided with a plurality ofly, and a plurality of bottle valve test fixture 4 all are connected with main road trachea 44 through reposition of redundant personnel trachea 47, and a plurality of bottle valve test fixture 4 are parallelly connected to be set up, keep apart alone through ball valve two 43 respectively, can independently carry out airtight detection, and a plurality of bottle valves of a plurality of bottle valve test fixture 4 can test a plurality of bottle valves simultaneously, improve the efficiency of software testing of high-pressure integrated bottle valve 7.
The utility model discloses a in the further embodiment, install safety relief valve 14 on the trachea between air intake filter 12 and the pneumatic valve 13, install safety relief valve two 25 on the trachea between mass flow meter 22 and the check valve 23, safety relief valve 14 is used for releasing the gas pressure in the high-pressure storage tank system 1 to the pressure value of settlement for gas pressure in the low pressure storage tank system 2 is released to the pressure value of settlement, plays safety protection's effect.
The utility model discloses a further embodiment, high-pressure storage tank 11's air inlet is connected with two 15 of needle valves through the trachea, the trachea and the booster compressor of high-pressure storage tank 11 air inlet are connected, be used for carrying high-pressure gas in to high-pressure storage tank 11, two 15 tracheal opening and closing that are used for controlling high-pressure storage tank 11 air inlets of needle valve, two 15 of needle valves are kept away from on the trachea of high-pressure storage tank 11 one side and are connected with the one end of a dozen trachea 16, install three 17 of needle valves on the dozen trachea 16, the other end of beating trachea 16 is connected with high-pressure hose, a test for other test work.
In a further embodiment of the present invention, the direction of the check valve 23 is from the mass flow meter 22 to the ball valve 24, so as to avoid the gas backflow.
The utility model discloses a further embodiment, high pressure storage tank system 1 still includes five 18 of needle valves, and five 18 of needle valves pass through the trachea and the parallelly connected setting of pneumatic valve 13, and when pneumatic valve 13 can't normally start, the test gas of five 18 in the manual start needle valves in to high pressure storage tank system 1 discharges.
The utility model discloses a further embodiment, when examining high pressure integrated cylinder valve 7, in packing into special frock with 150N x m moment with high pressure integrated cylinder valve 7 in advance, use the protective cover to cover the upper portion at high pressure integrated cylinder valve 7 to it is fixed with special frock and frock group support to use the chain, can reduce effectively and suppress the part departure risk of in-process.
The work flow of the high-pressure storage tank system 1 of the present invention is explained below:
(1) an external air source fills 90MPa pressure gas into the high-pressure storage tank 11 through a supercharger, the pressure is adjusted to be 43.8MPa at an outlet through a second pressure reducing valve arranged on the high-pressure storage tank 11, and the gas is filtered by an air inlet filter 12 to remove impurities;
(2) the second pneumatic valve 31 and the first ball valve 24 are closed, the first pneumatic valve 13, the second ball valve 43 and the third ball valve 45 are opened, the test gas in the high-pressure storage tank system 1 is conveyed to the cylinder valve test tool 4 through the main gas pipe 44, and the high-pressure integrated cylinder valve 7 is subjected to airtight test through a special helium leak detector;
(3) and after the air tightness test is finished, the second air-operated valve 31 is started to measure the gas release.
The work flow of the low pressure storage tank system 2 of the present invention is explained as follows:
1. an external gas source fills 4-5 MPa of low-pressure measuring gas into the low-pressure storage tank 21 through a needle valve IV 27 and a pressure reducing valve I26 in sequence;
2. closing the first pneumatic valve 13 and the second pneumatic valve 31, opening the first ball valve 24, the second ball valve 43 and the third ball valve 45, and conveying the test gas in the low-pressure storage tank system 2 to the cylinder valve test tool 4 through a main gas pipe 44;
3. the pressure transmitter 46 collects the gas pressure value in the main pipeline and sends the gas pressure value to the P L C control panel 51, when the gas pressure value is 2MPa, the P L C control panel 51 controls the mass flowmeter 22 to collect the flow data of the gas pipe in the low-pressure storage tank system 2 and sends the flow data to the P L C control panel 51, and the P L C control panel 51 analyzes and judges whether the flow data meet the specified requirements.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (9)
1. The utility model provides an airtight flow and electrical property test platform of high pressure integrated cylinder valve which characterized in that includes: the system comprises a high-pressure storage tank system (1), a low-pressure storage tank system (2), a pressure relief and emptying system (3), a cylinder valve testing tool (4) and an electrical property testing system (5);
the high-pressure storage tank system (1) comprises a high-pressure storage tank (11), an air inlet filter (12) and a pneumatic valve I (13) which are sequentially connected through an air pipe;
the low-pressure storage tank system (2) comprises a low-pressure storage tank (21), a mass flow meter (22), a one-way valve (23) and a ball valve I (24) which are sequentially connected through an air pipe;
the pressure relief and air release system (3) comprises a second pneumatic valve (31), a first needle valve (32) and a discharge air pipe (33), the second pneumatic valve (31) is arranged on the discharge air pipe (33), and the first needle valve (32) is connected with the second pneumatic valve (31) in parallel through an air pipe;
the cylinder valve testing tool (4) comprises a testing tool (41), a first pressure gauge (42) and a second ball valve (43), an air inlet of the testing tool (41) is sequentially connected with the first pressure gauge (42) and the second ball valve (43) through an air pipe, an inlet end of the second ball valve (43) is connected with one end of a main branch air pipe (44), the discharge air pipe (33), the first pneumatic valve (13) and the first ball valve (24) are connected through a four-way pipe, and a third ball valve (45) and a pressure transmitter (46) are arranged on the main branch air pipe (44);
the electrical property testing system (5) comprises a P L C control panel (51) and an electrical connector (52), the mass flow meter (22), the pressure transmitter (46) and the electrical connector (52) are all connected with the P L C control panel (51), and one end, far away from the P L C control panel (51), of the electrical connector (52) is connected with the high-voltage integration bottle valve (7).
2. The platform for testing the airtight flow rate and the electrical performance of the high-pressure integrated cylinder valve as claimed in claim 1, wherein the first pneumatic valve (13) and the second pneumatic valve (31) are respectively connected with two solenoid valves (6), the two solenoid valves (6) respectively control the first pneumatic valve (13) and the second pneumatic valve (31), and both the solenoid valves (6) are connected with the P L C control panel (51).
3. The airtight flow and electrical performance test platform of the high-voltage integrated cylinder valve according to claim 1, wherein a plurality of cylinder valve test tools (4) are provided, and the plurality of cylinder valve test tools (4) are connected with the main branch gas pipe (44) through a branch gas pipe (47).
4. The platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve as claimed in claim 1, wherein a first safety relief valve (14) is installed on an air pipe between the air inlet filter (12) and the first pneumatic valve (13), and a second safety relief valve (25) is installed on an air pipe between the mass flow meter (22) and the one-way valve (23).
5. The airtight flow and electrical performance test platform of the high-pressure integrated cylinder valve as claimed in claim 1, wherein the air inlet of the high-pressure storage tank (11) is connected with a second needle valve (15) through an air pipe, the second needle valve (15) is connected with one end of a pressurizing air pipe (16) on the air pipe at the side far away from the high-pressure storage tank (11), and a third needle valve (17) is installed on the pressurizing air pipe (16).
6. The platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve as claimed in claim 1, wherein a first pressure reducing valve (26) and a fourth needle valve (27) are sequentially connected to an air inlet of the low-pressure storage tank (21) through an air pipe, and a second pressure gauge (28) is installed on the air pipes on two sides of the low-pressure storage tank (21).
7. The platform for testing airtight flow and electrical performance of a hvlp-integration bottle valve as claimed in claim 1, wherein the direction of the check valve (23) is from the mass flow meter (22) to the ball valve one (24).
8. The platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve according to claim 1, wherein the high-pressure storage tank system (1) further comprises a needle valve five (18), and the needle valve five (18) is connected with the pneumatic valve one (13) in parallel through an air pipe.
9. The platform for testing the airtight flow and the electrical performance of the high-pressure integrated cylinder valve as claimed in claim 1, wherein a second pressure reducing valve is arranged at an air outlet in the high-pressure storage tank (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922346813.7U CN211121353U (en) | 2019-12-24 | 2019-12-24 | Airtight flow and electrical performance test platform of high-pressure integrated cylinder valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922346813.7U CN211121353U (en) | 2019-12-24 | 2019-12-24 | Airtight flow and electrical performance test platform of high-pressure integrated cylinder valve |
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| CN211121353U true CN211121353U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362494A (en) * | 2020-10-15 | 2021-02-12 | 中国特种设备检测研究院 | Hydraulic bulging test system |
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2019
- 2019-12-24 CN CN201922346813.7U patent/CN211121353U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362494A (en) * | 2020-10-15 | 2021-02-12 | 中国特种设备检测研究院 | Hydraulic bulging test system |
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