Testing device for valve

Abstract

The invention relates to the technical field of pneumatic testing of valves, and discloses a testing device for a valve, which comprises a test box body used for installing a valve to be tested and provided with a pressure sensor for detecting the internal air pressure of the valve; the first air supply pipe and the second air supply pipe are connected to the test box body in a manner of being controlled to be opened / closed; the first exhaust pipe and the second exhaust pipe can be controlled to be opened / closed to be connected to the test box body, and the first exhaust pipe and the second exhaust pipe are both connected with a vacuumizing device; and the second air supply pipe and the second exhaust pipe are respectively provided with a fine adjustment device. The invention provides a new adjusting and testing method for valve testing, and the testing accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve pneumatic testing, and particularly to a testing device for valves. Background Art

[0002] The accuracy and reliability of valves affect the overall performance of the equipment on which they are installed, and the performance of valves is crucial. To require valves to achieve precise reliability, it is very important to test the valves. The accuracy of the test and the requirements of the test items require us to have reliable test equipment.

[0003] Therefore, it is necessary to propose a testing device for valves. Summary of the Invention

[0004] The present invention discloses a testing device for valves to enable valve testing.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a testing device for valves, including:

[0007] A test chamber for installing a valve to be tested, and is provided with a pressure sensor for detecting the internal air pressure thereof;

[0008] A first air supply pipe and a second air supply pipe, which are controllably connected to the test chamber for opening / closing;

[0009] A first air extraction pipe and a second air extraction pipe, which are controllably connected to the test chamber for opening / closing, and both the first air extraction pipe and the second air extraction pipe are connected with a vacuum pumping device;

[0010] Wherein, micro-adjustment devices are respectively installed on the second air supply pipe and the second air extraction pipe.

[0011] In some embodiments, it further includes:

[0012] A first valve air supply pipe, which is connected into the test chamber for supplying air to the valve;

[0013] A valve exhaust pipe, which is connected into the test chamber for exhausting the test pipeline of the valve;

[0014] Wherein, a valve to be tested is installed between the first valve air supply pipe and the valve exhaust pipe.

[0015] In some embodiments, a proportional valve, a check valve and a first control valve are sequentially installed on the first valve air supply pipe along the fluid inlet direction.

[0016] In some embodiments, a sixth control valve, a pressure sensor, a second buffer tank and a pressure controller are successively installed on the valve exhaust pipe, and a vacuum pumping device is also connected between the second buffer tank and the pressure controller.

[0017] In some embodiments, a first buffer tank and a pressure sensor are also installed on the first valve air supply pipe, and the first buffer tank and the pressure sensor are installed between the check valve and the first control valve.

[0018] In some embodiments, a first bypass branch is further provided on the first valve air supply pipe. One end of the first bypass branch is controllably connected to the air inlet end of the first valve air supply pipe to be opened / closed, and the other end is connected between the check valve and the first control valve. A manual pressure regulating valve, a pressure measuring device and a check valve are successively installed on the first bypass branch along the gas flow direction.

[0019] In some embodiments, a second bypass branch is further provided on the first valve air supply pipe. One end of the second bypass branch is connected between the check valve and the first control valve, and the other end is connected to a test tooling inside the test chamber and can be selectively connected to the valve exhaust pipe. A fifth control valve is installed on the second bypass branch.

[0020] In some embodiments, the air source of the first valve air supply pipe is controllably connected to two air sources to be opened / closed.

[0021] In some embodiments, the fine adjustment device is a spiral tube, and the inner diameter of the spiral tube is 0.4 - 0.6 mm.

[0022] In some embodiments, an emptying pipe is further connected to the first air supply pipe and the second air supply pipe, and the emptying pipe is connected between the device for controlling the opening / closing of the first air supply pipe and the second air supply pipe and the test chamber.

[0023] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0024] Through the first air supply pipe, the second air supply pipe provided with a fine adjustment device, the first air extraction pipe and the second air extraction pipe provided with a fine adjustment device, the present application can improve the accuracy of air pressure adjustment in the chamber, with a simple structure and low cost. Through the solutions such as the first valve air supply pipe, the first bypass branch and the second bypass branch provided, the precise air supply to the valve can be improved, and manual adjustment can also be performed. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic diagram of the system connection of the pneumatic valve test device of the present invention;

[0027] Figure 2 and Figure 3 is a schematic diagram of the structure for testing the force value of the present invention;

[0028] Figure 4 and Figure 5 is a schematic diagram of the structure for testing the displacement value of the present invention. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0030] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0031] The test device for a valve provided in some embodiments of this application, as Figure 1 shown, includes:

[0032] A test chamber 1, which is used to install the valve to be tested and is provided with a pressure sensor for detecting the internal air pressure. A plurality of pipeline interfaces are provided in the test chamber 1 to facilitate connection with the test pieces in the test chamber 1;

[0033] The first air supply pipe 201 and the second air supply pipe 202 are controllably opened / closed and connected to the test chamber 1. Specifically, the first air supply pipe 201 and the second air supply pipe 202 are respectively controllably opened / closed through solenoid valves.

[0034] The first air extraction pipe 203 and the second air extraction pipe 204 are controllably opened / closed and connected to the test chamber 1. The first air extraction pipe 203 and the second air extraction pipe 204 are both connected to a vacuum pumping device. Among them, solenoid valves are provided on the first air extraction pipe 203 and the second air extraction pipe 204 for being controllably opened / closed, and they are both connected to the vacuum pumping device. The vacuum pumping device is a vacuum pump.

[0035] Among them, micro-adjustment devices TC01 are respectively installed on the second air supply pipe 202 and the second air extraction pipe 204. The micro-adjustment device TC01 is a spiral tube. The number of turns of the spiral tube is set as needed and can be several turns. The inner diameter of the spiral tube is 0.4 - 0.6 mm, generally set to 0.5 mm. The setting of the spiral tube can limit the gas flow rate.

[0036] The first air supply pipe 201 and the second air extraction pipe 204 are connected to a pressure air source of 0.9 MPa. The first air supply pipe 201 serves as a fast air supply pipe to supply air into the test chamber 1. When it is about to reach the preset adjusted air pressure, such as when reaching 90% - 97% of the target air pressure. For example, when the target air pressure is 0.5 MPa and when it reaches 0.46 MPa, control the solenoid valve on the first air supply pipe 201 to close, and control the solenoid valve on the second air supply pipe 202 to open. Due to the presence of the micro-adjustment device TC01, the subsequent air supply into the test chamber 1 becomes more precise, making the adjustment accuracy of the gas pressure in the test chamber 1 higher. When an experiment is needed to reach the set vacuum degree in the test chamber 1, close the solenoid valves on the first air supply pipe 201 and the second air supply pipe 202, control the solenoid valve on the first air extraction pipe 203 to open, and control the vacuum pump to evacuate the test chamber 1. When reaching 90% - 97% of the set vacuum degree, control the solenoid valve on the first air extraction pipe 203 to close, and control the solenoid valve on the second air extraction pipe 204 to open to evacuate the gas in the test chamber 1. By controlling the micro-adjustment device TC01 on the second air extraction pipe 204, the vacuum degree in the test chamber 1 can be more precisely adjusted.

[0037] In some embodiments, it further includes:

[0038] The first valve air supply pipe 301, connected to the inside of the test chamber 1 for supplying air to the valve;

[0039] The valve exhaust pipe 401, connected to the inside of the test chamber 1 for exhausting air from the valve test pipeline;

[0040] Between the first valve supply pipe 301 and the valve exhaust pipe 401, a valve under test is installed. The installation of the valve under test is connected through relevant tooling structures, including relevant testing instruments.

[0041] In some embodiments, a proportional valve PR01, a check valve, and a first control valve BAV04 are sequentially installed on the first valve supply pipe 301 along the fluid inlet direction. The proportional valve PR01 can control the gas pressure and flow rate supplied to the component under test. The proportional valve can be controlled electrically. The check valve can prevent gas backflow. The first control valve BAV04 can be a pneumatic ball valve that can be electrically controlled and can open or close the pipeline.

[0042] In some embodiments, a sixth control valve BAV06, a pressure sensor, a second buffer tank HCG02, and a pressure controller PR02 are sequentially installed on the valve exhaust pipe 401. A vacuum pumping device is also connected between the second buffer tank HCG02 and the pressure controller PR02. Specifically, the sixth control valve BAV06 is a pneumatic ball valve that can be electrically controlled. The pressure sensor is used to measure the pressure in the pipeline. The second buffer tank HCG02 is used to weaken the air pressure fluctuations. The pressure controller PR02 can act when the controlled pressure exceeds or is lower than the set value, playing a role in safety protection or automatic regulation.

[0043] In some embodiments, a first buffer tank HCG01 and a pressure sensor are also installed on the first valve supply pipe 301. The first buffer tank HCG01 and the pressure sensor are installed between the check valve and the first control valve BAV04. The first buffer tank HCG01 is used to weaken the air pressure fluctuations. The pressure sensor can continuously feedback the measured pressure to the central control system.

[0044] In some embodiments, a first bypass branch 302 is also provided on the first valve supply pipe 301. One end of the first bypass branch 302 is controllably connected to the inlet end of the first valve supply pipe 301 to be opened / closed, and the other end is connected between the check valve and the first control valve BAV04. A manual pressure regulating valve ST01, a pressure measuring device, and a check valve are sequentially installed on the first bypass branch 302 along the gas flow direction. Specifically, the first valve supply pipe 301 and the first bypass branch 302 are connected to the inlet pipe through a three-way pneumatic ball valve. Through the control of the three-way pneumatic ball valve, the air flow can be made to flow through the first valve supply pipe 301 or through the first bypass branch 302. A manual pressure regulating valve ST01 and a pressure measuring device are installed on the first bypass branch 302 to enable manual precise pressure regulation. The pressure measuring device can be a pressure gauge Y02.

[0045] In some embodiments, a second bypass branch 303 is further provided on the first valve supply pipe 301. One end of the second bypass branch 303 is connected between the check valve and the first control valve BAV04, and the other end is connected to the test fixture inside the test chamber 1 and can be selectively connected to the valve exhaust pipe 401. A fifth control valve BAV05 is installed on the second bypass branch 303. Specifically, the first control valve BAV04 and the fifth control valve BAV05 can facilitate the control of the gas flow path. The first control valve BAV04 and the fifth control valve BAV05 can both be pneumatic ball valves. Through the second bypass branch 303, it can be used for testing other targets at the same time, such as testing the air pressure value acting on the valve by the gas.

[0046] In some embodiments, the gas source of the first valve supply pipe 301 is controllably connected to two gas sources for opening / closing. That is, the first valve supply pipe 301 and the first bypass branch 302 are connected to a gas supply pipeline through a three-way valve. This gas supply pipeline is divided into two gases with different pressures, such as one is 0.9 MPa and the other is 1.2 MPa. Safety valves are installed on both gas supply pipelines, and both are connected to the connection point of the first valve supply pipe 301 and the first bypass branch 302 through a three-way valve. The three-way valve is an electrically controllable pneumatic ball valve.

[0047] In some embodiments, an exhaust pipe 205 is further connected to the first supply pipe 201 and the second supply pipe 202. The exhaust pipe 205 is connected between the device for controlling the opening / closing of the first supply pipe 201 and the second supply pipe 202 and the test chamber 1, that is, the exhaust pipe 205 is connected between the solenoid valves on the first supply pipe 201 and the second supply pipe 202 and the test chamber 1, and is used for manually exhausting the gas in the pipeline. A manual exhaust valve is installed on the exhaust pipe 205.

[0048] Further, in some embodiments, the present application provides a detection fixture 5 installed inside the test chamber 1, such as Figures 2 - 5 As shown, the detection fixture 5 includes a valve flap 501, a servo motor 502, and a force value sensor 503. The servo motor 502 is a linear servo motor, and its shaft can move axially. A force value sensor 503 is installed at the end of the shaft of the servo motor 502. The valve flap 501 is installed inside the valve body 505.

[0049] The specific test method is:

[0050] Force value test: Such as Figures 2 - 3As shown, first, control the movement of the shaft of the servo motor 502 so that the force value sensor 503 mounted on its shaft just abuts against the valve plate 501. At this time, control the valve plate 501 to be in the closed state, and control the gas source to be connected to the valve body 505 so that the gas source acts on the valve plate 501. The surface of the gas source acting on the valve plate 501 and the surface of the force value sensor 503 acting on the valve plate 501 are two opposite surfaces. When the gas source acts on the valve plate 501, the force value acting on the valve plate 501 can be measured by the force value sensor 503 at this time.

[0051] Deformation test (displacement test): As Figures 4 - 5 shown, first, install the valve plate 501 on the workbench to be tested, control the movement of the shaft of the servo motor 502 so that the force value sensor 503 mounted on its shaft just abuts against the valve plate 501. The elongation of the shaft of the servo motor 502 is A1. Control the shaft of the servo motor 502 to continue to elongate and reach the set pressure value acting on the valve plate 501. The pressure value can be measured by the force value sensor 503. After a set time, record the elongation of the shaft of the servo motor 502 as A2. The deformation amount of the valve plate 501 can be obtained by the difference between the two elongations of the shaft of the servo motor 502.

[0052] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed. It may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0053] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A test device for a valve, characterized in that, Comprising: A test chamber (1) for installing a valve to be tested, and is provided with a pressure sensor for detecting the internal air pressure thereof; A first air supply pipe (201) and a second air supply pipe (202), which are controllably connected to the test chamber (1) to be opened / closed; A first air extraction pipe (203) and a second air extraction pipe (204), which are controllably connected to the test chamber (1) to be opened / closed, and a vacuum pumping device is connected to both the first air extraction pipe (203) and the second air extraction pipe (204); Wherein, a fine adjustment device (TC01) is respectively installed on the second air supply pipe (202) and the second air extraction pipe (204).

2. The test device for a valve according to claim 1, wherein Further comprising: A first valve air supply pipe (301), which is connected into the test chamber (1) for supplying air to the valve; A valve exhaust pipe (401), which is connected into the test chamber (1) for exhausting the test pipeline of the valve; Wherein, a valve to be tested is installed between the first valve air supply pipe (301) and the valve exhaust pipe (401).

3. The test device for a valve according to claim 2, characterized in that, A proportional valve (PR01), a check valve and a first control valve (BAV04) are sequentially installed on the first valve air supply pipe (301) along the fluid inlet direction.

4. The test device for a valve according to claim 2, characterized in that, A sixth control valve (BAV06), a pressure sensor, a second buffer tank (HCG02) and a pressure controller (PR02) are sequentially installed on the valve exhaust pipe (401), and a vacuum pumping device is further connected between the second buffer tank (HCG02) and the pressure controller (PR02).

5. The test device for a valve according to claim 4, characterized in that, A first buffer tank (HCG01) and a pressure sensor are further installed on the first valve air supply pipe (301), and the first buffer tank (HCG01) and the pressure sensor are installed between the check valve and the first control valve (BAV04).

6. The test device for a valve according to claim 5, characterized in that, A first bypass branch (302) is further provided on the first valve air supply pipe (301). One end of the first bypass branch (302) is controllably connected to the inlet end of the first valve air supply pipe (301) to be opened / closed, and the other end is connected between the check valve and the first control valve (BAV04). A manual pressure regulating valve (ST01), a pressure measuring device and a check valve are sequentially installed on the first bypass branch (302) along the gas flow direction.

7. The test device for a valve according to claim 5, characterized in that, A second bypass branch (303) is further provided on the first valve air supply pipe (301). One end of the second bypass branch (303) is connected between the check valve and the first control valve (BAV04), and the other end is connected to the test tooling in the test chamber (1) and can be selectively connected to the valve exhaust pipe (401). A fifth control valve (BAV05) is installed on the second bypass branch (303).

8. The test device for a valve according to claim 2 or 7, characterized in that, The air source of the first valve air supply pipe (301) is controllably connected to two air sources to be opened / closed.

9. The test device for a valve according to claim 1, characterized in that, The fine adjustment device (TC01) is a spiral tube, and the inner diameter of the spiral tube is 0.4 - 0.6 mm.

10. The test device for a valve according to claim 1, characterized in that, An evacuation pipe (205) is also connected to the first gas supply pipe (201) and the second gas supply pipe (202), and the evacuation pipe (205) is connected between a device for controlling the opening / closing of the first gas supply pipe (201) and the second gas supply pipe (202) and the test chamber (1).

Images