Valve reliability test equipment

Abstract

The utility model discloses a valve reliability test device which is used for testing an electromagnetic switch valve in a submersible. A pressurizing cabin (120), a counting relay (130), a step-down circuit board (140), a safety valve (150) and a first flow meter (161) are installed on a shell (110) of the pressure meter. During testing, a to-be-tested valve (801) is sealed in the pressurization cabin, an air inlet end is assembled on a test air inlet seat (123), and electricity is taken from a general low-voltage power supply through a voltage reduction circuit board and a counting relay, and air is exhausted into the pressurization cabin; the pressurizing cabin exhausts air through a safety valve and a first flow meter, and the first flow meter is electrically connected with a universal computer terminal. The valve reliability test equipment can simulate the working atmosphere of the valve and is simple and convenient to operate.

Description

Technical Field

[0001] The present application relates to the field of underwater breathing apparatus manufacturing, and in particular to valve reliability testing equipment. Background Art

[0002] The internal gas valves of a submersible have specific structural, material and reliability requirements, such as the control valve of a submarine oxygen breathing machine disclosed in patent CN216319582U / 2022.

[0003] Patent CN102865978A / 2013 discloses a submersible respirator control valve tester in which the valve to be tested and the flowmeter are sealed together in a micro-compression chamber. The micro-compression chamber can be filled with gas to simulate the working environment, and the air is exhausted through a safety valve to maintain the internal pressure. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to improve the test device of the electromagnetic switch valve for a submersible to simplify the test operation.

[0005] The utility model discloses valve reliability testing equipment.

[0006] This valve reliability test equipment is used to test the electromagnetic switch valve inside the submersible. This valve reliability test equipment includes:

[0007] a shell;

[0008] a pressurized chamber installed in the shell and provided with a pressurized gas inlet seat, a test gas inlet seat and an exhaust valve;

[0009] A counting relay, installed in the housing, is used to control the valve to be tested. The power-on interval and power-on duration can be set and the number of power-on times can be accumulated;

[0010] a step-down circuit board mounted in the housing, with its input terminal connected to the output terminal of the counting relay, and a wire from the output terminal passing through the pressurized chamber to power the valve to be tested; and

[0011] A safety valve and a first flow meter are fixedly mounted on a housing outside the pressurized cabin and connected in series with each other, with the remaining air inlet end connected to the pressurized cabin and the remaining air outlet end being used for exhaust;

[0012] During the test, the valve to be tested is sealed in the pressurized cabin and the air inlet end is assembled on the test gas inlet seat. The test gas inlet seat is connected to the test gas source, the pressurized gas inlet seat is connected to the pressurized gas source, the counting relay is powered by a universal low-voltage power supply, and the first flow meter is electrically connected to the universal computer terminal.

[0013] In some embodiments of the present invention, it can be selected that the safety valve is of spring full-open type, and the set pressure setting range is 0.06 MPa to 4.0 MPa; further, the safety valve is of fully enclosed type, with the air inlet end connected to the pressurized cabin and the air outlet end connected to the first flow meter.

[0014] In some embodiments of the present invention, the valve reliability testing device may further include:

[0015] A second flow meter is installed on the housing, connected in series to the upstream of the pressurized gas inlet seat, and electrically connected to the universal computer terminal.

[0016] In some embodiments of the present invention, the pressurized cabin may be provided with a pressure gauge at the top and an opening at the top which is sealed by a hinged hatch buckle.

[0017] In some embodiments of the present invention, the main body of the pressurized cabin can be a stainless steel component.

[0018] In some embodiments of the present invention, the pressurized gas source may be a high-pressure air cylinder, and the test gas source may be a high-pressure oxygen cylinder.

[0019] In some embodiments of the present invention, the valve reliability testing device may further include:

[0020] A low-noise air compressor, serving as the pressurized air source and the test air source, is installed in the housing, connected to the test air inlet seat via a pneumatic booster pump, and connected to the pressurized air inlet seat via a pressure-stabilizing valve.

[0021] By implementing the technical solution of this utility model, the following beneficial effects can be achieved:

[0022] The valve reliability testing device disclosed in this utility model is used to test electromagnetic on / off valves within a submersible. Its housing houses a pressurized chamber, a counting relay, a pressure-reducing circuit board, a safety valve, and a first flowmeter. During testing, the valve under test is sealed within the chamber, with the air inlet mounted on the test air inlet seat. Power is drawn from a universal low-voltage power supply via the pressure-reducing circuit board and the counting relay, and exhaust is released into the chamber. The chamber is then exhausted through the safety valve and the first flowmeter, which is electrically connected to a universal computer terminal. This valve reliability testing device simulates the operating atmosphere of the valve and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings should be used in conjunction with the detailed description.

[0024] Figure 1 This is a schematic diagram of the use status of the valve reliability testing equipment in Example 1. DETAILED DESCRIPTION

[0025] The following describes embodiments with reference to the accompanying drawings.

[0026] In this specification, unless otherwise specified, "one embodiment", "some embodiments" and "other embodiments" are used to distinguish different embodiments and do not refer to all embodiments. The accompanying drawings are schematic diagrams, not scale drawings. The directions / positions indicated by top, bottom, center, edge, inside, outside, far, near, length, width, vertical, horizontal, up, down, front, back, left, right, etc. are based on the observation angle of the accompanying drawings and cannot be understood as the components / devices being located in specific positions or facing specific directions. Ordinal words such as first, second, third, etc. do not have a sequential meaning when used to distinguish components / devices with the same function / name.

[0027] Example 1

[0028] A valve reliability testing apparatus 100 is disclosed.

[0029] See also Figure 1 The valve reliability testing device 100 is used to test the electromagnetic switch valve inside the submersible, which includes a shell 110, a pressurization chamber 120, a counting relay 130, a step-down circuit board 140, a safety valve 150 and a first flow meter 161.

[0030] The stainless steel body of the pressurized cabin 120 is embedded in the top surface of the shell 110, and the top end is set to be open and exposed to the top surface of the shell 110. That is, most of the pressurized cabin 120 is located inside the shell 110.

[0031] The top of the pressurized cabin 120 is open, and is hinged with a stainless steel hinged cabin cover 121, which is sealed by a snap fastener of the hinged cabin cover 121.

[0032] A first pressure gauge 1261 is provided on the upper portion of the main body side wall of the pressurized cabin 120 to display the internal air pressure of the pressurized cabin 120 .

[0033] A test gas inlet seat 123 is located at the center of the bottom surface of the main body of the pressurized chamber 120. A second pressure gauge 1262 and a second flow meter 162 are located upstream of the test gas inlet seat 123 on the gas pipeline 101, adjacent to the test gas inlet seat 123, to display the pressure and flow of the test gas injected into the valve under test 801.

[0034] The lower sidewall of the main body of the pressurized chamber 120 is equipped with a pressurized gas inlet seat 122, to which another gas pipeline 101 is welded. This gas pipeline 101 is sequentially installed with an exhaust valve 124 and an exhaust muffler 125. Before and after each test, exhaust valve 124 should be opened to release air and then closed.

[0035] Both the pressurized air inlet 122 and the test air inlet 123 are connected to a low-noise air compressor 180. The low-noise air compressor 180 has two branch pipelines, serving as the test air source and the pressurized air source. In other words, both the pressurized air and the test air are compressed air, but the latter is at a higher pressure.

[0036] Another gas pipeline 101 is welded to the lower portion of the main body side wall of the pressurized cabin 120. A safety valve 150 and a first flow meter 161 are sequentially installed on the gas pipeline 101. The first flow meter 161 is used to detect the exhaust flow of the pressurized cabin 120.

[0037] In valve reliability testing equipment 100, the gas pipeline 101 utilizes flexible, pressure-resistant plastic tubing or 1mm inner diameter stainless steel tubing. The exhaust valve 124, exhaust muffler 125, safety valve 150, first flowmeter 161, second flowmeter 162, first pressure gauge 1261, and second pressure gauge 1262 are all fixedly mounted on the housing 110 outside the pressurized chamber 120. Components requiring frequent observation or operation are embedded in or fixed to the top surface of the housing 110.

[0038] Safety valve 150 is an AQ802 series product from Shanghai Beisite Automation Technology Co., Ltd. It is a fully enclosed and spring-loaded type with a set pressure range of 0.06 MPa to 4.0 MPa. Its air inlet is connected to the pressurized chamber 120, and its air outlet is connected to the first flowmeter 161. The air outlet of the first flowmeter 161 is exhausted.

[0039] That is, the safety valve 150 and the first flow meter 161 are connected in series with each other, the remaining air inlet end of the safety valve 150 is connected to the pressurized cabin 120, and the remaining air outlet end of the first flow meter 161 is exhausted.

[0040] The counting relay 130 is installed in the housing 110 and is used to control the valve 801 to be tested. The energizing interval and energizing duration can be set and the number of energizing times can be accumulated. The counting relay 130 can be a commercial product with the above functions.

[0041] The step-down circuit board 140 is installed in the housing 110 , and its input end is connected to the output end of the counting relay 130 . The wire of the output end passes through the pressurizing chamber 120 to supply power to the valve 801 to be tested.

[0042] The step-down circuit board 140 is adapted to the counting relay 130 and the valve to be tested 801. It is a dedicated circuit that detects only one valve, or an adjustable circuit that can adapt to multiple valves. The relevant solutions belong to the common knowledge of electrical and electronic technology and need not be elaborated.

[0043] The structure of the valve reliability testing device 100 is further described in the following exemplary use process. The exemplary use process includes the following steps:

[0044] S100. Installation

[0045] Connect the valve to be tested 801 to the step-down circuit board 140 via a wire, assemble it on the test gas inlet seat 123 through the air inlet end, and then seal it in the pressurized cabin 120;

[0046] Connect the pressurized air inlet 122 and the test air inlet 123 to a low-noise air compressor 180. Low-noise air compressor 180 supplies compressed air at 0.7-1.3 MPa (7-13 bar). Its gas pipeline has two branches: one branch connects to the pressurized air inlet 122 via a shutoff valve 181 and a pressure-stabilizing valve 183, while the other branch connects to the test air inlet 123 via another shutoff valve 181, a booster valve 182, and a second flowmeter 162. The booster valve 320 uses the SMC VBA10A-0.2GN booster valve from Japan, with a maximum output pressure of 2.0 MPa. This ensures that the outlet pressure of the valve under test 801 is greater than the pressure in the pressurized chamber.

[0047] Connect the counting relay 130 to the universal low voltage power supply 300;

[0048] The first flow meter 161 and the second flow meter 162 are connected to the general computer terminal 200 via cables 102. The general computer terminal 200 is pre-installed with a test program module that can record the ventilation flow of each of the two flow meters and accumulate and compare the total gas flow of the two;

[0049] S200. Pressurization

[0050] Connect compressed air to the pressurized chamber so that the first pressure gauge 1261 displays a predetermined pressure P1 and the second pressure gauge 1262 displays a predetermined pressure P2, where P2 is greater than P1 but not more than twice P2;

[0051] S300. Settings

[0052] The power-on interval and power-on duration of the counting relay 130 are set, and the universal low-voltage power supply 300 is turned on to activate the valve to be tested 801, and the counting relay 130 starts counting at the same time;

[0053] Turn on both digital flow meters and wait for 3 minutes to allow the cumulative ventilation volume of both to increase synchronously;

[0054] S400. Zero

[0055] In the GUI of the test program module, the total gas throughput of the two digital flow meters is synchronized to zero;

[0056] S500. Record

[0057] If the first pressure gauge does not significantly deviate from the predetermined pressure P1 (e.g., deviation <±5%), the total gas flow rates of the two digital flow meters are consistent (e.g., difference <±1%), and the solenoid valve 801 to be tested does not operate (no flow change) or the flow rate caused by each operation significantly decreases (e.g., <90% of the rated value), immediately record the cumulative number of energizations of the counting relay 130 and the test duration of the test program module;

[0058] S600. Calculation

[0059] Calculate the service life of the valve to be tested based on the cumulative number of power-ons and cumulative test time.

[0060] That is, during the test, the valve to be tested 801 is sealed in the pressurized chamber 120, with the air inlet end assembled on the test gas inlet seat 123, the test gas inlet seat 123 is connected to the test gas source, the pressurized gas inlet seat 122 is connected to the pressurized gas source, the counting relay 130 is powered by the universal low-voltage power supply 300, and the first flow meter 161 is electrically connected to the universal computer terminal 200.

[0061] The technical advantages of valve reliability testing equipment 100 are:

[0062] 1) The first flow meter is connected in series with the safety valve, located outside the pressurized chamber and fixedly mounted on the housing. It is not sealed in the pressurized chamber, so that the pressurized chamber only accommodates the valve to be tested, which is easy to operate.

[0063] 2) By comparing the accumulated flow of the two flow meters, the air tightness of the pressurized chamber can be tested to avoid invalid testing caused by accidental leakage;

[0064] 3) A counting relay is used to drive the valve to be tested 801, which can effectively detect the service life of the electromagnetic switch valve at a low cost.

[0065] In another embodiment, the pressurized chamber is horizontal with its opening toward the front of the housing, thereby facilitating testing of large valves.

[0066] In another embodiment, the pressurized gas source is a high-pressure air cylinder, and the test gas source is a high-pressure oxygen cylinder, thereby approaching the working conditions of a single-person diving breathing apparatus.

[0067] In another embodiment, the positions of the safety valve 150 and the first flow meter 161 can be exchanged. Since the gas outlet of the safety valve 150 is directly exhausted, the safety valve 150 can be selected to be open.

[0068] Example 2

[0069] Disclosed is a valve reliability testing device.

[0070] The valve reliability testing device is based on the valve reliability testing device 100 of the first embodiment, with the following improvements.

[0071] The valve reliability testing device includes a low-noise air compressor 180 . The low-noise air compressor 180 and its pipeline components are fixedly installed inside the housing 110 .

[0072] Other aspects of the valve reliability testing equipment are basically the same as those in the first embodiment.

[0073] Example 3

[0074] Disclosed is a valve reliability testing device.

[0075] The valve reliability testing device is based on the valve reliability testing device 100 of the first embodiment, with the following improvements.

[0076] The relevant functions of the universal computer terminal 200, the universal low-voltage power supply 300, the counting relay 130 and the low-voltage circuit board 140 in the first embodiment are equivalently replaced by an embedded computer system and its actuator.

[0077] Other aspects of the valve reliability testing equipment are basically the same as those in the first embodiment.

[0078] All of the above embodiments, application examples, and technical analyses are intended to introduce the technical concepts and features of this utility model and to enable those skilled in the art to implement the technical solutions of this utility model. They do not constitute any limitation on the scope of protection of this utility model. Simple modifications and equivalent conversions of the above embodiments are within the scope of protection of this utility model.

Claims

1. A valve reliability testing device (100) for testing electromagnetic switch valves inside a submersible, characterized in that include: a housing (110); A pressurized cabin (120) is installed in the shell and is provided with a pressurized gas inlet seat (122), a test gas inlet seat (123) and an exhaust valve (124); A counting relay (130) is installed in the housing and is used to control the valve to be tested (801), and can set the power-on interval and power-on duration and accumulate the number of power-on times; A step-down circuit board (140) is installed in the housing, the input end of which is connected to the output end of the counting relay, and the wire of the output end is passed through the pressurized cabin to supply power to the valve to be tested; and A safety valve (150) and a first flow meter (161) are both fixedly mounted on a housing outside the pressurized cabin and connected in series with each other, with the remaining air inlet end connected to the pressurized cabin and the remaining air outlet end being used for exhaustion; During the test, the valve to be tested is sealed in the pressurized cabin and the air inlet end is assembled on the test gas inlet seat. The test gas inlet seat is connected to the test gas source, the pressurized gas inlet seat is connected to the pressurized gas source, the counting relay is powered by a universal low-voltage power supply, and the first flow meter is electrically connected to the universal computer terminal.

2. The reliability testing equipment according to claim 1, characterized in that: The safety valve is a spring-loaded full-open type, and the set pressure range is 0.06 MPa to 4.0 MPa.

3. The reliability testing equipment according to claim 2, characterized in that: The safety valve is of a fully enclosed type, with its air inlet end connected to the pressurized cabin and its air outlet end connected to the first flow meter.

4. The reliability testing device according to claim 1, characterized in that Also includes: A second flow meter (162) is mounted on the housing, connected in series upstream of the pressurized gas inlet seat, and electrically connected to the universal computer terminal.

5. The reliability testing equipment according to claim 1, characterized in that: The pressurized cabin is provided with a pressure gauge on the upper part and an opening on the top end which is sealed by a hinged hatch buckle.

6. The reliability testing equipment according to claim 1, characterized in that: The main body of the pressurized cabin is a stainless steel component.

7. The reliability testing equipment according to claim 1, characterized in that: The pressurized gas source is a high-pressure air cylinder, and the test gas source is a high-pressure oxygen cylinder.

8. The reliability testing device according to claim 1, characterized in that Also includes: A low-noise air compressor, serving as the pressurized air source and the test air source, is installed in the housing, connected to the test air inlet seat via a pneumatic booster pump, and connected to the pressurized air inlet seat via a pressure-stabilizing valve.

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