A proportional valve leakage test device based on adaptive pressure regulation technology

Abstract

The present invention discloses a proportional valve leakage testing device based on adaptive pressure regulation technology, comprising: a conveyor belt, guide shafts are fixedly arranged on both sides of the conveyor belt; a plurality of first slides and second slides are slidably arranged in each guide shaft, and the first slides and second slides in the same guide shaft are staggered; each of the first slides is provided with a connecting component, and the connecting component is connected to a pressure regulating device to realize the interface connection of the proportional valve; a fitting component is connected in each of the second slides, and the connecting components in the two guide shafts correspond to each other, while the fitting components are staggered; a bracket is fixedly arranged above the conveyor belt, a lifting rod is arranged below the bracket, and the lifting rod and the bracket are connected through a lifting cylinder; a plurality of circuit plugs are arranged in the lifting rod; the present invention improves the test efficiency and accuracy and realizes automated testing.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing, in particular to a proportional valve leakage testing device based on a self-adaptive pressure regulating technology. Background Art

[0002] Proportional valve is an important hydraulic control component, which controls the displacement of the valve core through electrical signals, thereby achieving continuous proportional control of liquid flow, pressure or direction. Proportional valve has the advantages of high control accuracy, fast response speed and compact structure, and is widely used in industrial automation, aerospace, automobile manufacturing and other fields. Leakage test of proportional valve is an important means to ensure its quality and reliability. It is a key process in the production process of proportional valve and is of great significance to improving product quality.

[0003] Existing devices usually require each proportional valve to be tested individually. During the test, the proportional valve needs to be removed from the production line, placed in the test device, and then pressurized and leak tested one by one. This method is not only time-consuming and labor-intensive, but also inefficient.

[0004] Existing devices usually require manual alignment of the proportional valve's input / output interface with the connector of the test device. Due to the different sizes and shapes of proportional valves, the interface alignment process is cumbersome and prone to errors, resulting in low test efficiency and difficulty in ensuring accuracy. The interfaces of proportional valves are usually small and complex, making the alignment process more difficult. Even experienced operators may cause inaccurate alignment due to visual errors or operating errors, which may affect the accuracy of test results.

[0005] Therefore, it is necessary to provide a proportional valve leakage testing device based on adaptive pressure regulation technology to solve the problems raised in the above background technology. Summary of the invention

[0006] To achieve the above object, the present invention provides the following technical solution: a proportional valve leakage test device based on adaptive pressure regulation technology, comprising:

[0007] A conveyor belt, used for sequentially placing the proportional valves to be tested, wherein guide shafts are fixedly arranged on both sides of the conveyor belt;

[0008] A plurality of first slide plates and second slide plates are slidably arranged in each guide shaft, and the first slide plates and the second slide plates in the same guide shaft are staggered;

[0009] Each of the first slide plates is provided with a connecting assembly, and the connecting assembly is connected to the pressure regulating device to realize the interface connection of the proportional valve;

[0010] Each of the second slide plates is connected with a fitting component, and the connecting components in the two guide shafts correspond to each other, while the fitting components are staggered with each other;

[0011] A bracket is fixedly arranged above the conveyor belt, a lifting rod is arranged below the bracket, and the lifting rod is connected to the bracket through a lifting cylinder for controlling the up and down movement of the lifting rod;

[0012] A plurality of circuit plugs are arranged in the lifting rod. When the lifting rod descends, each circuit plug can be inserted into the socket of the corresponding proportional valve to establish an electrical connection.

[0013] Furthermore, a cross connecting rod is hinged between adjacent first sliding plates and second sliding plates in the same guide shaft, and adjacent cross connecting rods are hinged to each other.

[0014] Furthermore, a variable pitch screw is rotatably provided on the conveyor belt side wall of each guide shaft, and a rotating handle is provided at one end of the variable pitch screw;

[0015] A second slide plate closest to the rotating handle in the same guide shaft is threadedly connected to the variable pitch screw, the remaining first slide plates and second slide plates are slidably connected to the variable pitch screw, and a first slide plate farthest from the rotating handle is fixedly connected to the guide shaft.

[0016] Furthermore, the connecting assembly includes a slider and a connector, the slider is slidably arranged in the first slide plate, and the connector is fixed in the slider.

[0017] Furthermore, the laminating assembly includes a rotating rod, the rotating rod is rotatably hinged with the second slide plate, a support plate is provided on one side of the rotating rod, and a side of the support plate away from the rotating rod is connected to the laminating plate via a spring;

[0018] A telescopic cylinder is hinged between the rotating rod and the second slide plate.

[0019] Furthermore, a slide groove is provided on the upper side of the rotating rod, and a slide rod is slidably arranged in the slide groove;

[0020] The rotating rod and the sliding rod are respectively hinged to the supporting plate through a connecting rod.

[0021] Furthermore, a clamping push plate is respectively provided in the brackets on both sides of the conveyor belt, and the clamping push plate is slidably connected to each slider on the same side.

[0022] Furthermore, the clamping push plate fits with each sliding rod on the same side.

[0023] Furthermore, the bracket is provided with a clamping screw for rotating forward and backward respectively, and the clamping screw is threadedly connected with two clamping push plates respectively, and the thread rotation directions of the clamping screw and the two clamping push plates are opposite;

[0024] Each of the clamping screws is connected with a driving motor.

[0025] Furthermore, the pressure regulating device comprises:

[0026] Air pump, used to generate and supply compressed gas at a certain pressure;

[0027] A main valve connected to the output end of the air pump;

[0028] A plurality of input valves are respectively connected to the main valve and are used to provide adjustable stable air pressure to the input port of the proportional valve in the connecting assembly on one side according to a preset pressure value;

[0029] The pressure sensor is connected to the output port of each proportional valve in the connecting assembly on the other side, and is used to monitor the total air pressure value output by each proportional valve in real time.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention adopts a conveyor belt to automatically transport the proportional valve to be tested, and cooperates with an adaptive slide plate and a fitting component to quickly and accurately locate and connect each proportional valve, thereby greatly shortening the test preparation time.

[0032] The spacing of the slide plates in the device of the present invention can be flexibly adjusted by a variable pitch screw to adapt to proportional valves of different widths and models, thereby enhancing the versatility and adaptability of the device. The fitting component adopts an elastic fitting design, which can closely fit proportional valves of various shapes and sizes, ensuring the stability and accuracy of the connection during the test.

[0033] The telescopic action of the telescopic cylinder in the present invention can accurately control the rotation angle of the rotating rod, thereby ensuring that the bonding components can be lowered in sequence from the front end to the rear end of the conveyor belt in a predetermined order, and the proportional valve to be tested is clamped between the two bonding components. When the sliding rod slides in the sliding groove, it can drive the supporting plate to move back and forth, and then the bonding plate is elastically bonded to the proportional valve to be tested, which not only ensures that the proportional valve is located at the center position of the two bonding components, but also enables the connecting component to be accurately aligned with the input and output ends of the proportional valve, providing a reliable connection basis for subsequent testing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of a proportional valve leakage test device based on adaptive pressure regulation technology;

[0035] Figure 2It is a schematic diagram of the three-dimensional structure of each connecting component and bonding component in the present invention;

[0036] Figure 3 It is a schematic diagram of the planar structure of each connecting component and bonding component in the present invention;

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of one set of connecting components and bonding components in the present invention;

[0038] Figure 5 It is a schematic diagram of the planar structure of one set of connecting components and bonding components in the present invention;

[0039] Figure 6 It is a structural schematic diagram of the pressure regulating device in the present invention;

[0040] In the figure: 1. conveyor belt; 2. guide shaft; 21. first slide plate; 22. second slide plate; 23. cross connecting rod; 24. variable pitch screw; 3. connecting assembly; 31. slider; 32. connector; 4. bracket; 5. lifting rod; 51. lifting cylinder; 6. circuit plug; 7. clamping push plate; 8. clamping screw; 81. driving motor; 9. fitting assembly; 91. rotating rod; 92. support plate; 93. fitting plate; 94. spring; 95. sliding rod; 96. connecting rod; 97. telescopic cylinder. DETAILED DESCRIPTION

[0041] See also Figure 1-Figure 5 In an embodiment of the present invention, a proportional valve leakage test device based on adaptive pressure regulation technology includes:

[0042] A conveyor belt 1 is used to sequentially place the proportional valves to be tested, and guide shafts 2 are fixedly arranged on both sides of the conveyor belt 1;

[0043] A plurality of first slide plates 21 and second slide plates 22 are slidably disposed in each guide shaft 2, and the first slide plates 21 and second slide plates 22 in the same guide shaft 2 are staggeredly distributed;

[0044] Each of the first slide plates 21 is provided with a connecting assembly 3, and the connecting assembly 3 is connected to the pressure regulating device to realize the interface connection of the proportional valve;

[0045] Each of the second slide plates 22 is connected with a fitting component 9, and the connecting components 3 in the two guide shafts 2 correspond to each other, while the fitting components 9 are staggered with each other;

[0046] A bracket 4 is fixedly arranged above the conveyor belt 1, and a lifting rod 5 is arranged below the bracket 4. The lifting rod 5 is connected to the bracket 4 through a lifting cylinder 51 for controlling the up and down movement of the lifting rod 5;

[0047] A plurality of circuit plugs 6 are arranged in the lifting rod 5. When the lifting rod 5 descends, each circuit plug 6 can be inserted into the socket of the corresponding proportional valve to establish an electrical connection.

[0048] When the multiple proportional valves to be tested on the conveyor belt 1 move to the position of the guide shaft 2, the connecting components 3 on the guide shafts 2 on both sides are connected to the interfaces at both ends of each proportional valve to be tested in turn, and the lifting rod 5 is driven down by the lifting cylinder 51, so that each circuit plug 6 is inserted into the socket of the corresponding proportional valve to be tested, thereby controlling the opening and closing state of each proportional valve to be tested, and applying a certain pressure of air pressure to the input port of the proportional valve to be tested through the pressure regulating device, and detecting the air pressure at its output port at the same time, so as to test the leakage of the proportional valve to be tested.

[0049] In this embodiment, a cross link 23 is hinged between adjacent first slide plates 21 and second slide plates 22 in the same guide shaft 2, and adjacent cross links 23 are hinged to each other.

[0050] In this embodiment, a variable pitch screw 24 is rotatably provided on the side wall of the conveyor belt 1 on each guide shaft 2, and a rotating handle is provided at one end of the variable pitch screw 24;

[0051] The second slide plate 22 closest to the rotating handle in the same guide shaft 2 is threadedly connected to the variable pitch screw 24, the remaining first slide plates 21 and second slide plates 22 are slidingly connected to the variable pitch screw 24, and the first slide plate 21 farthest from the rotating handle is fixedly connected to the guide shaft 2.

[0052] That is to say, by rotating the variable pitch screw 24, the second slide 22 threadedly connected to it can be driven to slide, and under the action of the cross-link 23, each first slide 21 and second slide 22 in the same guide shaft 2 maintain the same distance, so that the fitting component 9 can be fitted to the proportional valves of different widths to be tested.

[0053] In this embodiment, the connecting component 3 includes a slider 31 and a connector 32 . The slider 31 is slidably disposed in the first slide plate 21 , and the connector 32 is fixed in the slider 31 .

[0054] The connector 32 is used to connect to the input end or output end of the proportional valve to be tested, and is connected to the pressure regulating device through a conduit. The connector 32 can be inserted into or removed from the input end or output end of the proportional valve to be tested by sliding the slider 31.

[0055] In this embodiment, the laminating assembly 9 includes a rotating rod 91, the rotating rod 91 is rotatably hinged with the second slide plate 22, a support plate 92 is provided on one side of the rotating rod 91, and a side of the support plate 92 away from the rotating rod 91 is connected to a laminating plate 93 through a spring 94;

[0056] A telescopic cylinder 97 is hinged between the rotating rod 91 and the second slide plate 22 .

[0057] The telescopic cylinder 97 is extended and retracted to drive the rotating rod 91 to rotate, and the rotating rod 91 of each bonding component 9 is lowered in sequence from the front end to the rear end of the conveyor belt 1, so that the proportional valve to be tested placed in the conveyor belt 1 can be clamped between the two bonding components 9 in sequence, and the input end and the output end can be connected by the connecting components 3 on both sides respectively.

[0058] In this embodiment, a sliding groove is provided on the upper side of the rotating rod 91, and a sliding rod 95 is slidably arranged in the sliding groove;

[0059] The rotating rod 91 and the sliding rod 95 are respectively hinged to the supporting plate 92 via a connecting rod 96 .

[0060] That is to say, when the sliding rod 95 slides, the support plate 92 can move forward and backward, so that the bonding plate 93 can elastically fit into the proportional valve to be tested, ensuring that the proportional valve to be tested is located in the center of the two bonding components 9, so that the connecting component 3 can be aligned with the input and output ends of the proportional valve to be tested.

[0061] In this embodiment, a clamping push plate 7 is respectively disposed in the brackets 4 on both sides of the conveyor belt 1 , and the clamping push plate 7 is slidably connected to each slider 31 on the same side.

[0062] In this embodiment, the clamping push plate 7 is in contact with each slide bar 95 on the same side.

[0063] In this embodiment, the bracket 4 is provided with a clamping screw 8 for rotating forward and backward, respectively, and the clamping screw 8 is threadedly connected with two clamping push plates 7, respectively, and the thread rotation directions of the clamping screw 8 and the two clamping push plates 7 are opposite;

[0064] Each of the clamping screws 8 is connected to a driving motor 81 .

[0065] That is to say, by driving the two clamping screws 8 to rotate synchronously through the driving motor 81, the two clamping push plates 7 can be moved closer to or away from each other. When the two clamping push plates 7 are close to each other, each slider 31 on both sides can be pushed to move closer to the proportional valve to be tested, so that the connector 32 is inserted into the input end or output end of the proportional valve to be tested. At the same time, it will also push the slide rod 95 to move, so that the bonding plate 93 is bonded to the proportional valve to be tested.

[0066] See also Figure 6 In this embodiment, the pressure regulating device includes:

[0067] Air pump, used to generate and supply compressed gas at a certain pressure;

[0068] A main valve connected to the output end of the air pump;

[0069] A plurality of input valves, respectively connected to the main valve, for providing an adjustable stable air pressure to the input port of the proportional valve in the connecting assembly 3 on one side according to a preset pressure value;

[0070] The pressure sensor is connected to the output port of each proportional valve in the connecting component 3 on the other side, and is used to monitor the total air pressure value output by each proportional valve in real time.

[0071] Specifically, the detection methods include:

[0072] S1. After each connecting assembly 3 on both sides is respectively connected to the input and output ends of N proportional valves to be tested, each input valve is in an open state, and the air pump provides an air pressure of P. After the main valve is opened, an air pressure of P / N is applied to the input end of each proportional valve to be tested, and each proportional valve to be tested is controlled to open at a ratio of 1 / n, where n is a variable from large to small and is greater than 1. The pressure detected by the pressure sensor at each moment should be P / n.

[0073] S2. When the pressure measured by the pressure sensor is not equal to P / N, it proves that one or more of the proportional valves to be tested are leaking. At this time, after closing all the input valves, open one input valve at a time. At this time, the pressure detected by the pressure sensor at each moment should be P / Nn. When one of the input valves is opened, when the pressure measured by the pressure sensor is not equal to P / Nn, it proves that the proportional valve to be tested is leaking.

[0074] By using a preset strategy of gradually opening the proportional valve (gradually reducing at a ratio of 1 / n) combined with the monitoring of the pressure sensor, it is possible to accurately identify in a short period of time whether there is a leaking proportional valve. Since the leaking proportional valves are in the minority, only the preliminary detection step S1 needs to be performed in most batches. This method not only improves the accuracy of the detection, but also significantly shortens the detection cycle.

[0075] The specific implementation includes the following steps:

[0076] Place multiple proportional valves to be tested on the conveyor belt 1 in order, ensure that the input end and output end of each proportional valve face the guide shafts 2 on both sides, and start the conveyor belt 1 to transport the proportional valves to be tested to the position of the guide shafts 2;

[0077] By extending and retracting the telescopic cylinder 97, the rotating rod 91 of each laminating component 9 is driven to rotate in turn, so that the laminating plate 93 is elastically attached to the front and rear of each proportional valve to be tested, ensuring that the proportional valve is located at the center of the two laminating components 9;

[0078] Start the driving motor 81 to drive the two clamping screws 8 to rotate synchronously, so that the two clamping push plates 7 approach each other, and push the slider 31 to move toward the direction of the proportional valve to be tested, ensuring that the connector 32 is fully inserted into the input end or output end of the proportional valve. At the same time, the clamping push plate 7 will also push the slide bar 95 to move, further ensuring that the fitting plate 93 fits the proportional valve tightly;

[0079] The lifting rod 5 is driven down by the lifting cylinder 51, so that each circuit plug 6 is inserted into the socket of the corresponding proportional valve to establish an electrical connection;

[0080] A certain pressure is applied to the input port of the proportional valve through the pressure regulating device, and the pressure sensor is used to monitor the pressure at its output port. According to the preset leakage detection standard, it is judged whether the proportional valve has leakage.

[0081] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A proportional valve leakage test device based on adaptive pressure regulation technology, characterized in that: include: A conveyor belt (1) is used to sequentially place proportional valves to be tested, and guide shafts (2) are fixedly arranged on both sides of the conveyor belt (1); A plurality of first slide plates (21) and second slide plates (22) are slidably arranged in each guide shaft (2), and the first slide plates (21) and second slide plates (22) in the same guide shaft (2) are staggeredly distributed; Each of the first slide plates (21) is provided with a connecting assembly (3), and the connecting assembly (3) is connected to a pressure regulating device to realize an interface connection of a proportional valve; Each of the second slide plates (22) is connected to a fitting component (9), and the connecting components (3) in the two guide shafts (2) correspond to each other, while the fitting components (9) are staggered with each other; A bracket (4) is fixedly arranged above the conveyor belt (1), a lifting rod (5) is arranged below the bracket (4), and the lifting rod (5) is connected to the bracket (4) via a lifting cylinder (51) for controlling the up and down movement of the lifting rod (5); A plurality of circuit plugs (6) are arranged in the lifting rod (5), and when the lifting rod (5) descends, each circuit plug (6) can be inserted into a socket of a corresponding proportional valve to establish an electrical connection; The connecting assembly (3) comprises a slider (31) and a connector (32), wherein the slider (31) is slidably arranged in the first slide plate (21), and the connector (32) is fixed in the slider (31); The laminating assembly (9) comprises a rotating rod (91), the rotating rod (91) being rotatably hinged to the second slide plate (22), a supporting plate (92) being arranged on one side of the rotating rod (91), and a side of the supporting plate (92) away from the rotating rod (91) being connected to a laminating plate (93) via a spring (94); A telescopic cylinder (97) is hingedly connected between the rotating rod (91) and the second slide plate (22); A sliding groove is provided on the upper side of the rotating rod (91), and a sliding rod (95) is slidably arranged in the sliding groove; The rotating rod (91) and the sliding rod (95) are each hingedly connected to the supporting plate (92) via a connecting rod (96).

2. A proportional valve leakage test device based on adaptive pressure regulation technology according to claim 1, characterized in that: A cross connecting rod (23) is hinged between adjacent first slide plates (21) and second slide plates (22) in the same guide shaft (2), and adjacent cross connecting rods (23) are hinged to each other.

3. A proportional valve leakage test device based on adaptive pressure regulation technology according to claim 2, characterized in that: A variable pitch screw (24) is rotatably provided on the side wall of the conveyor belt (1) on each guide shaft (2), and a rotating handle is provided at one end of the variable pitch screw (24); A second slide plate (22) closest to the rotating handle in the same guide shaft (2) is threadedly connected to the variable pitch screw (24), the remaining first slide plates (21) and second slide plates (22) are slidably connected to the variable pitch screw (24), and a first slide plate (21) farthest from the rotating handle is fixedly connected to the guide shaft (2).

4. The proportional valve leakage test device based on the adaptive pressure regulation technology according to claim 1 is characterized in that: A clamping push plate (7) is respectively arranged in the brackets (4) on both sides of the conveyor belt (1), and the clamping push plate (7) is slidably connected to each slider (31) on the same side.

5. A proportional valve leakage test device based on adaptive pressure regulation technology according to claim 4, characterized in that: The clamping push plate (7) is fitted with each slide bar (95) on the same side.

6. A proportional valve leakage test device based on adaptive pressure regulation technology according to claim 5, characterized in that: The bracket (4) is provided with a clamping screw (8) which rotates forward and backward respectively, and the clamping screw (8) is threadedly connected to the two clamping push plates (7) respectively, and the thread rotation directions of the clamping screw (8) and the two clamping push plates (7) are opposite; Each of the clamping screws (8) is connected to a driving motor (81).

7. The proportional valve leakage test device based on the adaptive pressure regulation technology according to claim 1 is characterized in that: The pressure regulating device comprises: Air pump, used to generate and supply compressed gas at a certain pressure; A main valve connected to the output end of the air pump; A plurality of input valves, respectively connected to the main valve, for providing an adjustable stable air pressure to an input port of a proportional valve in a connecting assembly (3) on one side according to a preset pressure value; The pressure sensor is connected to the output port of each proportional valve in the connecting assembly (3) on the other side, and is used to monitor the total air pressure value output by each proportional valve in real time.

Images