Multifunctional pneumatic valve group test bench

Abstract

The present application relates to a kind of multifunctional air control valve group test bench, including bottom plate, the upper surface of the bottom plate is fixed with test bench body, the right side of the test bench body is fixed with operation table, the upper of the test bench body is equipped with spraying mechanism, the upper of the operation table is equipped with positioning mechanism.The multifunctional air control valve group test bench, by controlling the operation button on operation table nitrogen is introduced into the inside of air control valve group body, the air passage of test bench body checks whether there is leakage in the inside of air control valve group body, according to the pressure data of air control valve group body detected on test bench body, drive electric push rod to make moving plate move up and down, drive water pump to extract leak detection liquid in water tank and spray on the outside of air control valve group body by spray head, by driving motor, can make the rotating spray head make leak detection liquid spray more evenly, by leak detection liquid, the sealing condition of air control valve group body can be detected, reach the purpose of multifunctional detection.

Description

Technical Field

[0001] This invention relates to the field of pneumatic valve assembly test bench technology, specifically a multifunctional pneumatic valve assembly test bench. Background Technology

[0002] The pneumatic valve assembly test bench is an offline device that simulates the working environment of a safety valve and raises the internal pressure to the level required for the safety valve to open. The pressure gauge on the device displays the opening pressure of the pneumatic valve assembly, which can be used to verify the opening pressure and sealing test pressure of the pneumatic valve assembly.

[0003] For example, Chinese patent CN 112611556 B discloses a test bench for testing safety valves, including a test bench and a clamp for holding the safety valve. The test bench has a through hole, and a lifting joint that can slide up and down is installed in the through hole. A mounting plate is circumferentially arranged with multiple clamping groups. The clamping group includes a hinge seat integrally formed with the mounting plate and a clamping block hinged in the hinge seat. The clamping block is inverted L-shaped, and a hinge platform is integrally formed at the outer end of the inverted L-shaped clamping block. The clamping block is hinged to the hinge seat through the hinge platform. An arc-shaped block is integrally formed at the front end of the clamping block, and a top block is integrally formed at the lower end of the clamping block. A blind plate is provided between the top block and the safety valve. An air hole is provided on the blind plate. A vent pipe is fixedly installed at the air hole on the side of the blind plate away from the safety valve. The blind plate is slidably and detachably connected to the mounting plate. An elastic element is installed between the lower end of the clamping block and the mounting plate.

[0004] The aforementioned test bench for testing safety valves still has certain shortcomings. For example, although it achieves stable clamping of the safety valve through the cooperation of a left-right movable clamp, a Y-shaped positioning seat, and a vertically movable lifting joint, simplifying the operation process and avoiding the cumbersome operation caused by the structural defects of existing test benches, it does not have a function to check the sealing performance of the safety valve, which reduces the functionality and practicality of the test bench for testing safety valves. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multifunctional pneumatic valve assembly test bench, which has the advantage of multifunctional testing and solves the problem that it does not have a function to check the sealing performance of safety valves, thus reducing the functionality of the test bench for safety valve testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional pneumatic valve assembly test bench, comprising a base plate, a test bench body fixed on the upper surface of the base plate, an operating table fixed on the right side of the test bench body, a spraying mechanism above the test bench body, a positioning mechanism above the operating table, two air vents on the upper surface of the operating table, a movable plate above the test bench body, and a pneumatic valve assembly body above the operating table;

[0007] The spraying mechanism includes a motor fixed to the upper surface of a movable plate, a belt drivingly connecting the outer side of the motor output shaft, a sleeve rotatably connected to the upper surface of the movable plate via a bearing, the bottom end of the sleeve penetrating the upper surface of the movable plate and extending to the lower part of the movable plate and fixedly connected to a nozzle, a water pump fixed to the upper surface of the movable plate, an inlet pipe fixedly connected to the inlet end of the water pump, an outlet pipe fixedly connected to the outlet end of the water pump, a protective box fixed to the upper surface of the movable plate, a movable box fixed to the lower surface of the movable box, a fixed box slidably connected to the outer side of the movable box, a support plate fixed to the lower surface of the fixed box, a water tank fixed to the bottom wall of the inner cavity of the test platform body, and an electric push rod fixed to the bottom wall of the inner cavity of the fixed box.

[0008] The positioning mechanism includes a mounting box fixed to the upper surface of the operating table. A threaded rod is rotatably connected between the front and rear side walls of the inner cavity of the mounting box via bearings. Two clamping plates are threaded to the outer side of the threaded rod. A positioning frame is fixed on the opposite side of the two clamping plates. A sliding rod is fixed between the front and rear side walls of the inner cavity of the mounting box. An operating groove is opened on the opposite side of the mounting box.

[0009] Furthermore, two installation doors are installed on the left side of the test bench body, and an electrostatic rubber sheet is fixed on the upper surface of the operating table.

[0010] Furthermore, the bottom end of the nozzle is rotatably connected to the lower surface of the moving plate via a bearing, and the nozzle is located above the air control valve assembly body.

[0011] Furthermore, the end of the water outlet pipe away from the water pump is rotatably connected to the top of the sleeve via a sealed bearing, and the sleeve is driven inside the belt.

[0012] Furthermore, the top end of the output shaft of the electric push rod is fixedly connected to the top wall of the inner cavity of the movable box, and the inside of the water tank is filled with leak detection fluid.

[0013] Furthermore, the water inlet pipe is a flexible hose, with one end of the water inlet pipe away from the water pump passing through the left side of the water tank and extending into the interior of the water tank.

[0014] Furthermore, a water injection pipe is fixed to the left side of the water tank, and the support plate is fixed to the left side of the test platform body by bolts.

[0015] Furthermore, the positioning mechanism also includes a connecting rod fixed to the front of the threaded rod, and a handle is fixed to the end of the connecting rod away from the threaded rod.

[0016] Furthermore, the threaded rod consists of two screws with opposite thread directions, and the two clamping plates are respectively threaded to the outside of the two screws.

[0017] Furthermore, each of the two clamping plates has a sliding hole on its opposite side, and the sliding rod is slidably connected inside the two sliding holes.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] 1. This multi-functional pneumatic valve assembly test bench allows nitrogen gas to be introduced into the pneumatic valve assembly body by pressing the operation buttons on the control panel. The test bench body's vent is used to check for leaks inside the valve assembly body. Pressure data of the valve assembly body can be detected using the pressure gauge on the test bench body. An electric push rod can move the moving plate up and down. A water pump can extract leak detection fluid from the tank and spray it onto the outside of the valve assembly body through a nozzle. A driving motor allows the rotating nozzle to spray the leak detection fluid more evenly. The leak detection fluid can be used to detect the sealing condition of the pneumatic valve assembly body, achieving the purpose of multi-functional testing.

[0020] 2. This multi-functional pneumatic valve assembly test bench, by placing the pneumatic valve assembly body to be tested on the bottom wall of the inner cavity of the mounting box, and by turning the handle, the two clamping plates move relative to each other to clamp the pneumatic valve assembly body, so that the air inlet end and the air outlet end of the pneumatic valve assembly body pass through the two positioning frames respectively and connect to the air vent on the operating table, and ensure that it is sealed, achieves the purpose of clamping the pneumatic valve assembly body. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the spraying mechanism of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the positioning mechanism of the present invention.

[0026] In the diagram: 1. Base plate, 2. Spraying mechanism, 201. Motor, 202. Belt, 203. Sleeve, 204. Nozzle, 205. Water pump, 206. Inlet pipe, 207. Outlet pipe, 208. Protection box, 209. Movable box, 210. Support plate, 211. Water tank, 212. Fixed box, 213. Electric push rod, 3. Test bench body, 4. Positioning mechanism, 401. Mounting box, 402. Threaded rod, 403. Clamping plate, 404. Positioning frame, 405. Slide rod, 406. Operating slot, 407. Connecting rod, 408. Handle, 5. Operating table, 6. Vent, 7. Moving plate, 8. Air control valve assembly body. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-2 This embodiment of a multifunctional pneumatic valve assembly test bench includes a base plate 1, a test bench body 3 fixed on the upper surface of the base plate 1, a pressure regulating valve on the test bench body 3, an operating table 5 fixed on the right side of the test bench body 3, an operating button installed on the upper surface of the operating table 5, which allows nitrogen gas to be introduced into the pneumatic valve assembly body 8 by pressing the operating button on the operating table 5, a spraying mechanism 2 above the test bench body 3, a positioning mechanism 4 above the operating table 5, two pressure gauges installed on the test bench body 3 for testing high pressure and low pressure respectively, and the pressure data of the pneumatic valve assembly body 8 can be detected by the pressure gauges on the test bench body 3, two air vents 6 on the upper surface of the operating table 5, a movable plate 7 above the test bench body 3, and a pneumatic valve assembly body 8 above the operating table 5. The pneumatic valve assembly body 8 contains a main valve body, a spring cover, a spring cover nut, a handle connection part, a bottom discharge port, a connection part between the main valve body and the shuttle valve, a reset valve, and a plug.

[0029] In this embodiment, two installation doors are installed on the left side of the test bench body 3, and an electrostatic rubber sheet is fixed on the upper surface of the operating table 5. The electrostatic rubber sheet is three millimeters thick and is green.

[0030] It should be noted that nitrogen gas is introduced into the pneumatic control valve assembly body 8 by pressing the operation button on the control panel 5. The pressure is then adjusted to 2.0MPa, 7.0MPa and 10MPa respectively by the pressure regulating valve on the test bench body 3. After the gas source pressure stabilizes, the internal parts of the pneumatic control valve assembly body 8 are checked for leaks through the air inlet 6 of the test bench body 3. Zero leakage is required in the main valve body spring cover, spring cover nut, handle connection, bottom discharge port, connection between the main valve body and shuttle valve, reset valve and plug.

[0031] Please see Figure 3-4To achieve multi-functional detection, the spraying mechanism 2 in this embodiment includes a motor 201 fixed to the upper surface of the moving plate 7. A belt 202 is driven to the outer side of the motor 201's output shaft. A sleeve 203 is rotatably connected to the upper surface of the moving plate 7 via a bearing. The bottom end of the sleeve 203 penetrates the upper surface of the moving plate 7 and extends to the bottom of the moving plate 7, and is fixedly connected to a nozzle 204. A water pump 205 is fixed to the upper surface of the moving plate 7. A water inlet pipe 206 is fixedly connected to the water inlet end of the water pump 205. The outlet end of 05 is fixedly connected to a water outlet pipe 207, which is a rigid water pipe. A protective box 208 is fixed to the upper surface of the movable plate 7, and a movable box 209 is fixed to the lower surface of the movable plate 7. A fixed box 212 is slidably connected to the outside of the movable box 209. A support plate 210 is fixed to the lower surface of the fixed box 212. A water tank 211 is fixed to the bottom wall of the inner cavity of the test platform body 3. An electric push rod 213 is fixed to the bottom wall of the inner cavity of the fixed box 212. The movable plate 7 can be moved up and down by driving the electric push rod 213.

[0032] In this embodiment, the bottom end of the nozzle 204 is rotatably connected to the lower surface of the movable plate 7 via a bearing. The nozzle 204 is located above the pneumatic valve assembly body 8. The end of the water outlet pipe 207 away from the water pump 205 is rotatably connected to the top end of the sleeve 203 via a sealed bearing. By driving the water pump 205, the leak detection fluid in the water tank 211 can be extracted and transferred to the inside of the sleeve 203, and sprayed onto the outside of the pneumatic valve assembly body 8 through the nozzle 204. The sleeve 203 is driven and connected to the inside of the belt 202. The top end of the output shaft of the electric push rod 213 is fixedly connected to the top wall of the inner cavity of the movable box 209. By driving the motor 201, the sleeve 203 starts to rotate. The end of the water pipe 207 away from the water pump 205 is rotatably connected to the top of the sleeve 203 through a sealed bearing. Therefore, when the sleeve 203 rotates, the outlet pipe 207 will not rotate with it. The inside of the water tank 211 is filled with leak detection fluid. The inlet pipe 206 is a flexible hose. The end of the inlet pipe 206 away from the water pump 205 passes through the left side of the water tank 211 and extends into the inside of the water tank 211. A water injection pipe is fixed on the left side of the water tank 211. The support plate 210 is fixed to the left side of the test bench body 3 by bolts. The rotating nozzle 204 can make the leak detection fluid spray more evenly. The leak detection fluid can be used to detect the sealing condition of the pneumatic valve assembly body 8, achieving the purpose of multi-functional detection.

[0033] It should be noted that by pressing the operation button on the control panel 5 to introduce nitrogen into the interior of the pneumatic valve assembly body 8, the air vent 6 of the test bench body 3 is used to check for leaks inside the pneumatic valve assembly body 8. The pressure data of the pneumatic valve assembly body 8 can be detected by the pressure gauge on the test bench body 3. The moving plate 7 can be moved up and down by driving the electric push rod 213. The leak detection liquid in the water tank 211 can be extracted by driving the water pump 205 and sprayed on the outside of the pneumatic valve assembly body 8 through the nozzle 204. The rotating nozzle 204 can be driven by the driving motor 201 to make the leak detection liquid spray more evenly. The leak detection liquid can be used to detect the sealing condition of the pneumatic valve assembly body 8, achieving the purpose of multi-functional testing.

[0034] Please see Figure 5 In order to clamp the pneumatic valve assembly body 8, the positioning mechanism 4 in this embodiment includes a mounting box 401 fixed to the upper surface of the operating table 5. A threaded rod 402 is rotatably connected between the front and rear side walls of the inner cavity of the mounting box 401 via bearings. Two clamping plates 403 are threadedly connected to the outer side of the threaded rod 402. The pneumatic valve assembly body 8 to be tested is placed on the bottom wall of the inner cavity of the mounting box 401, and then the air inlet end of the pneumatic valve assembly body 8 is oriented towards the front clamping plate 403. A positioning frame 404 is fixed on the opposite side of the two clamping plates 403. A sliding rod 405 is fixed between the front and rear side walls of the inner cavity of the mounting box 401. An operating groove 406 is opened on the opposite side of the mounting box 401, so that the air inlet end and the exhaust end of the pneumatic valve assembly body 8 pass through the two positioning frames 404 respectively and are connected to the air vent 6 on the operating table 5, ensuring that they are sealed.

[0035] In this embodiment, the positioning mechanism 4 further includes a connecting rod 407 fixed to the front of the threaded rod 402. A handle 408 is fixed to the end of the connecting rod 407 away from the threaded rod 402. The threaded rod 402 is composed of two screws with opposite thread directions. Two clamping plates 403 are respectively threaded to the outside of the two screws. Each of the two clamping plates 403 has a sliding hole on its opposite side. A sliding rod 405 is slidably connected inside the two sliding holes. By rotating the handle 408, the threaded rod 402 starts to rotate. Since the threaded rod 402 is composed of two screws with opposite thread directions, and the two clamping plates 403 are respectively threaded to the outside of the two screws, and both clamping plates 403 are slidably connected to the outside of the sliding rod 405, the relative movement of the two clamping plates 403 clamps the pneumatic valve assembly body 8.

[0036] It should be noted that by placing the pneumatic valve assembly body 8 to be tested on the bottom wall of the inner cavity of the mounting box 401, and by rotating the handle 408, the two clamping plates 403 move relative to each other to clamp the pneumatic valve assembly body 8, and the air inlet and exhaust ends of the pneumatic valve assembly body 8 pass through the two positioning frames 404 respectively, and are connected to the air vent 6 on the operating table 5, and the seal is ensured, thus achieving the purpose of clamping the pneumatic valve assembly body 8.

[0037] It is understood that all electrical components mentioned in this article are electrically connected to the main controller and power supply, and all electrical components mentioned in this article are conventional and known devices. This application will not elaborate further. The main controller can be a conventional and known device such as a computer that performs control. The control circuit of the main controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this invention is mainly used to protect mechanical devices, so this invention will not explain the control method and circuit connection in detail. At the same time, all parts not described in detail in this invention are common technologies known to those skilled in the art.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The working principle of the above embodiments is as follows:

[0040] (1) When the multi-functional pneumatic valve assembly test bench is needed, the pneumatic valve assembly body 8 to be tested is placed on the bottom wall of the inner cavity of the mounting box 401, and then the air inlet end of the pneumatic valve assembly body 8 is oriented toward the front clamping plate 403. At this time, by turning the handle 408, the threaded rod 402 starts to rotate. Since the threaded rod 402 is composed of two screws with opposite thread directions, the two clamping plates 403 are respectively threaded to the outside of the two screws, and the two clamping plates 403 are slidably connected to the outside of the slide rod 405, so that the two clamping plates 403 move relative to each other to clamp the pneumatic valve assembly body 8, and the air inlet end and exhaust end of the pneumatic valve assembly body 8 pass through the two positioning frames 404 respectively, and are connected to the air vent 6 on the operating table 5, and ensure that it is sealed.

[0041] (2) At this time, nitrogen gas is introduced into the pneumatic control valve assembly body 8 by pressing the operation button on the control panel 5. The pressure is adjusted to 2.0MPa, 7.0MPa and 10MPa respectively by the pressure regulating valve on the test bench body 3. After the gas source pressure is stable, check for leaks inside the pneumatic control valve assembly body 8 through the air inlet 6 of the test bench body 3. Zero leakage is required in the main valve body spring cover, spring cover nut, handle connection, bottom discharge port, connection between the main valve body and shuttle valve, reset valve and plug. At the same time, the pressure data of the pneumatic control valve assembly body 8 can be detected by the pressure gauge on the test bench body 3. At the same time, the moving plate 7 can be moved by driving the electric push rod 213. The device moves up and down, and the water pump 205 draws out the leak detection fluid from the water tank 211 and transfers it to the inside of the sleeve 203. The fluid is then sprayed onto the outside of the pneumatic valve assembly body 8 through the nozzle 204. At the same time, the drive motor 201 causes the sleeve 203 to rotate. Since the end of the water outlet pipe 207 away from the water pump 205 is rotatably connected to the top of the sleeve 203 through a sealed bearing, the water outlet pipe 207 will not rotate when the sleeve 203 rotates. The water outlet pipe 207 is a rigid water pipe. The rotating nozzle 204 makes the leak detection fluid spray more evenly. The leak detection fluid can be used to detect the sealing condition of the pneumatic valve assembly body 8, achieving the purpose of multi-functional detection.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional pneumatic valve assembly test bench, comprising a base plate (1), characterized in that: The test platform body (3) is fixed on the upper surface of the base plate (1), and the operating table (5) is fixed on the right side of the test platform body (3). A spraying mechanism (2) is provided above the test platform body (3), and a positioning mechanism (4) is provided above the operating table (5). Two air vents (6) are opened on the upper surface of the operating table (5). A moving plate (7) is provided above the test platform body (3), and a pneumatic valve assembly body (8) is provided above the operating table (5). The spraying mechanism (2) includes a motor (201) fixed to the upper surface of the movable plate (7). A belt (202) is driven to the outer side of the output shaft of the motor (201). A sleeve (203) is rotatably connected to the upper surface of the movable plate (7) through a bearing. The bottom end of the sleeve (203) penetrates the upper surface of the movable plate (7) and extends to the bottom of the movable plate (7) and is fixedly connected to a nozzle (204). A water pump (205) is fixed to the upper surface of the movable plate (7). The water inlet end of the water pump (205) is fixedly connected to a water inlet pipe (204). 06), the outlet end of the water pump (205) is fixedly connected to the outlet pipe (207), the upper surface of the movable plate (7) is fixed with the protective box (208), the lower surface of the movable plate (7) is fixed with the movable box (209), the outer side of the movable box (209) is slidably connected with the fixed box (212), the lower surface of the fixed box (212) is fixed with the support plate (210), the bottom wall of the inner cavity of the test bench body (3) is fixed with the water tank (211), and the bottom wall of the inner cavity of the fixed box (212) is fixed with the electric push rod (213). The positioning mechanism (4) includes a mounting box (401) fixed on the upper surface of the operating table (5). A threaded rod (402) is rotatably connected between the front and rear side walls of the inner cavity of the mounting box (401) through a bearing. Two clamping plates (403) are threadedly connected to the outer side of the threaded rod (402). A positioning frame (404) is fixed on the opposite side of the two clamping plates (403). A sliding rod (405) is fixed between the front and rear side walls of the inner cavity of the mounting box (401). An operating groove (406) is opened on the opposite side of the mounting box (401).

2. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: Two installation doors are installed on the left side of the test bench body (3), and an electrostatic rubber sheet is fixed on the upper surface of the operating table (5).

3. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The bottom end of the nozzle (204) is rotatably connected to the lower surface of the movable plate (7) via a bearing, and the nozzle (204) is located above the pneumatic control valve assembly body (8).

4. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The end of the water outlet pipe (207) away from the water pump (205) is rotatably connected to the top of the sleeve (203) through a sealed bearing, and the sleeve (203) is driven to the inside of the belt (202).

5. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The top end of the output shaft of the electric push rod (213) is fixedly connected to the top wall of the inner cavity of the movable box (209), and the interior of the water tank (211) is filled with leak detection fluid.

6. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The water inlet pipe (206) is a flexible hose. The end of the water inlet pipe (206) away from the water pump (205) passes through the left side of the water tank (211) and extends into the interior of the water tank (211).

7. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: A water injection pipe is fixed to the left side of the water tank (211), and the support plate (210) is fixed to the left side of the test bench body (3) by bolts.

8. The multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The positioning mechanism (4) further includes a connecting rod (407) fixed to the front of the threaded rod (402), and a handle (408) is fixed to the end of the connecting rod (407) away from the threaded rod (402).

9. A multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: The threaded rod (402) consists of two screws with opposite thread directions, and the two clamping plates (403) are threadedly connected to the outside of the two screws respectively.

10. A multifunctional pneumatic valve assembly test bench according to claim 1, characterized in that: Each of the two clamping plates (403) has a sliding hole on its opposite side, and the sliding rod (405) is slidably connected inside the two sliding holes.

Images