Rapid sealing leak detection tool for differential pressure transmitter

Abstract

The utility model provides the rapid sealing leak detection tool for the differential pressure transmitter, which is simple in structure, high in detection accuracy and simple and convenient to operate. The tool comprises a box body, an air cylinder, a clamping structure and a water tank, the clamping structure is driven by the air cylinder, and a plurality of differential pressure transmitters are clamped at a time and pushed into the water tank for leakage detection. A clamping structure adopts a multi-plate staggered design, and a plurality of differential pressure transmitters can be detected simultaneously by using components such as a sealing pressurizing movable plate and a bleed valve limiting plate. And the sealing performance of the differential pressure transmitter is accurately judged according to the change of bubbles in the water tank. The tool adopts an electromagnetic valve to control pressurization and pressure relief, operation is simple and convenient, and detection efficiency is high. Different types of differential pressure transmitters can be detected, and high adaptability is achieved. The design of the positioning joint and the O-shaped sealing ring ensures the sealing performance of the pressure tapping port, and the detection accuracy is further improved. The tool is stable in structure, simple and convenient to operate, and suitable for rapid leak detection of various differential pressure transmitters.

Description

Technical Field

[0001] The utility model belongs to the technical field of differential pressure transmitter leak detection, and particularly relates to a rapid sealing leak detection tooling for differential pressure transmitters. Background Art

[0002] The rapid leak detection tooling for differential pressure transmitters is a technical means designed to solve the common problem of air leakage in differential pressure transmitters in industry. In actual applications, due to reasons such as poor sealing, improper installation, or a decline in sealing performance after long-term use, differential pressure transmitters may experience air leakage. This can lead to inaccurate measurements, a decline in system performance, and safety hazards. Therefore, differential pressure transmitters need to be leak-tested for sealing performance before leaving the factory to provide customers with high-quality products.

[0003] Defects and deficiencies of the prior art:

[0004] Problem of detection accuracy: Some existing rapid leak detection toolings may have problems with low detection accuracy in actual applications and cannot effectively detect minute gas leaks.

[0005] Low leak detection efficiency: Traditional leak detection toolings usually adopt manual methods and can only detect one differential pressure transmitter at a time, which is time-consuming and difficult to achieve rapid and large-scale detection. The manual operation method has subjective errors and consumes a large amount of manpower, resulting in low efficiency.

[0006] Poor adaptability: Some toolings may have insufficient adaptability to different types or sizes of differential pressure transmitters and require frequent calibration and maintenance.

[0007] Operation complexity: The operation of some rapid leak detection toolings may require complex training or professional knowledge, which requires additional learning and mastering time for operators. Content of the Utility Model

[0008] Aiming at the above deficiencies in the prior art, the purpose of the utility model is to provide a rapid sealing leak detection tooling for differential pressure transmitters with a simple structure, high detection accuracy, simple operation, and high adaptability.

[0009] The technical solution of the utility model is as follows:

[0010] A rapid sealing leak detection tooling for differential pressure transmitters includes a box body, a cylinder arranged above the box body, a clamping structure arranged in the middle of the box body for clamping the differential pressure transmitter, and a water tank arranged below the clamping structure; the cylinder is fixed above the box body through a cross-bridge support, the push-pull rod of the cylinder is vertically and downwardly arranged, the clamping structure is arranged between the cross-bridge supports, and the push-pull rod of the cylinder is fixedly connected with the clamping structure;

[0011] The clamping structure includes a support plate, two parallel and horizontally arranged guide rods on the support plate, a clamping bolt, and a thrust fixing plate, a drain valve limiting push plate, a number of sealing and pressurizing movable plates, a number of drain valve limiting movable plates, and a drain valve limiting fixing plate that are sequentially sleeved on the two guide rods in parallel; among them, a number of the sealing and pressurizing movable plates and a number of the drain valve limiting movable plates are staggered between the drain valve limiting push plate and the drain valve limiting fixing plate, and the ones adjacent to the drain valve limiting push plate and the drain valve limiting fixing plate are both sealing and pressurizing movable plates; a number of the differential pressure transmitters are respectively clamped on both sides of the sealing and pressurizing movable plates; the thrust fixing plate and the drain valve limiting fixing plate are respectively fixed at both ends of the support plate, the two ends of the guide rods are respectively fixed on the thrust fixing plate and the drain valve limiting fixing plate, and a number of the differential pressure transmitters are all placed between the two guide rods; a penetrating threaded sleeve is fixedly arranged in the middle of the thrust fixing plate, the screw rod of the clamping bolt is matched with the threaded sleeve, and the end of the screw rod abuts against the middle of the drain valve limiting push plate; a pressure relief valve and a pressure tapping port are arranged on the differential pressure transmitter, positioning joints that are hermetically connected to the pressure tapping ports of the differential pressure sensors are respectively arranged on both sides of the sealing and pressurizing movable plates, and limiting structures that are matched with the pressure relief valves on the differential pressure transmitters are arranged on the drain valve limiting push plate, the drain valve limiting movable plates, and the drain valve limiting fixing plate; a pressurizing channel that is communicated with the two positioning joints is arranged in the sealing and pressing movable plate, a pressurizing joint that is connected to the pressurizing channel is arranged on the sealing and pressing movable plate, and the pressurizing joint is connected to an air inlet pipe.

[0012] Through the arrangement of the drain valve limiting push plate, the sealing and pressurizing movable plates, the drain valve limiting movable plates, and the drain valve limiting fixing plate, under the action of the clamping bolt and the thrust fixing plate, by tightening the clamping bolt, a number of differential pressure transmitters are sequentially clamped along the direction of the guide rods. The differential pressure transmitters can be respectively clamped between the drain valve limiting push plate and the sealing and pressing movable plate, between the sealing and pressing movable plate and the drain valve limiting movable plate, and between the sealing and medium movable plate and the drain valve limiting fixing plate. Only one fixation is required to realize the detection of multiple differential pressure transmitters, so that multiple differential pressure transmitters can be detected at one time, improving the leak detection efficiency and reducing the complexity of the operation. The water tank is arranged directly below the clamping structure. The cylinder is fixed on the box body through a cross bridge bracket. The push-pull rod of the cylinder is fixedly connected to the clamping structure and pushes and pulls the clamping structure into or out of the water tank. By pushing and pulling the clamping structure with the cylinder, multiple differential pressure transmitters can be immersed in water for detection at one time, with simple operation and improved detection efficiency.

[0013] Further, the positioning joint is in a trumpet shape, and its large head is arranged on the stamping and sealing movable plate; an O-ring seal is also arranged around the positioning joint.

[0014] The positioning joint is set in a flared shape to facilitate the docking and matching of the positioning joint with the pressure tapping port. Through the setting of the O-ring seal, a closed space can be formed between the differential pressure transmitter and the gas path, improving the accuracy of detection.

[0015] Furthermore, the push-pull rod of the cylinder is fixedly connected to the support plate through a connecting frame. The connecting frame is arranged inside the cross-bridge support. The connecting frame includes a connecting plate fixedly connected to the push-pull rod and connecting legs arranged on both sides of the connecting plate. The two connecting legs on both sides are respectively fixedly connected to the support plates on both sides of the guide rod.

[0016] Both the connecting frame and the cross-bridge support of the present utility model are industrial profiles. Since the connecting leg and the support plate are connected in a contact surface manner, the clamping structure is stably connected to the connecting frame.

[0017] Preferably, there are two sealing and stamping movable plates, one drain valve limiting movable plate, and the upper limit of the number of differential pressure transmitters detected by the leak detection tooling is four; an air path ball valve is provided on the intake pipeline fixed to the box body. The front-section intake pipeline of the air path ball valve is communicated with the pressure connection joint on one sealing and stamping movable plate, and the rear-section intake pipeline of the air path ball valve is communicated with the pressure connection joint on the other sealing and stamping movable plate.

[0018] Detecting four differential pressure transmitters at one time is convenient for operation and also convenient for observing when the differential pressure transmitters enter the water. And two differential pressure transmitters are in a group. When only two differential pressure transmitters need to be detected, the two differential pressure transmitters can be connected to the front-section intake pipeline of the air path ball valve, and the air path ball valve can be closed.

[0019] The drain valve limiting push plate, the sealing and stamping movable plate, the drain valve limiting movable plate, and the drain valve limiting fixed plate of the present utility model are all replaceable. When different differential pressure transmitters need to be detected, the above drain valve limiting push plate, sealing and stamping movable plate, drain valve limiting movable plate, and drain valve limiting fixed plate can be replaced with models matching the differential pressure transmitters, improving the adaptability of the leak detection tooling.

[0020] The intake pipeline is fixedly arranged on the box body. An electromagnetic valve is provided on the intake pipeline. The intake pipeline is communicated with the pressure connection joint through a hose. The air path is controlled to be ventilated or not through the electromagnetic valve.

[0021] A drain switch is provided at the bottom of the water tank; a control box for controlling the electromagnetic valve and the cylinder is provided on the box body; four universal wheels are installed at the bottom of the box body.

[0022] By setting the control box, functions such as the reciprocating movement of the cylinder, pressure inlet and pressure relief can be realized.

[0023] Compared with the prior art, the present utility model has the following technical effects:

[0024] 1. The utility model differential pressure transmitter quick seal leak detection tool can accurately judge whether the differential pressure transmitter is leaking through the change of bubbles inside the water tank, and can effectively detect tiny gas leaks.

[0025] 2. The utility model adopts an electric-driven gas circuit control system, which can realize functions such as pressurization, cylinder reciprocating motion and pressure relief through the solenoid valve.

[0026] 3. The utility model has high adaptability and can detect differential pressure transmitters with different clamping plate types.

[0027] 4. The utility model is relatively simple to operate and does not require complex training or professional knowledge, so that operators can quickly master and complete the process operation with high leak detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The contents expressed in the drawings of the specification and the symbols in the drawings are briefly explained:

[0029] Figure 1 2 is a schematic structural diagram of a leak detection tool in an embodiment;

[0030] Figure 2 yes Figure 1 A top view of the view;

[0031] Figure 3 is a schematic structural diagram of the clamping structure of the embodiment;

[0032] Figure 4 yes Figure 1 The enlarged view of point A in the middle;

[0033] Figure 5 1 is a schematic diagram of the cylinder connection structure of the embodiment;

[0034] In the figure: 1. box body; 2. cylinder; 3. water tank; 4. bridge bracket; 5. support plate; 6. guide rod; 7. clamping bolt; 8. thrust fixing plate; 9. drain valve limit push plate; 10. differential pressure transmitter; 11. sealing pressurizing movable plate; 12. drain valve limit movable plate; 13. drain valve limit fixing plate; 14. threaded sleeve; 15. positioning joint; 16. pressurized channel; 17. pressurized joint; 18. air intake pipe; 19. O-ring; 20. connecting plate; 21. connecting leg; 22. air circuit ball valve; 23. solenoid valve; 24. hose; 25. drain switch; 26. control box; 27 universal wheel. DETAILED DESCRIPTION

[0035] The following gives a non-limiting embodiment in conjunction with the accompanying drawings to further illustrate the present utility model. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present utility model. Embodiment

[0036] As Figure 1 shown, a quick-sealing leak detection tooling for a differential pressure transmitter includes a box body 1, a cylinder 2 arranged above the box body 1, a clamping structure arranged in the middle of the box body 1 for clamping the differential pressure transmitter 10, and a water tank 3 arranged below the clamping structure; the cylinder 2 is fixed above the box body 1 through a cross-bridge support 4, the push-pull rod of the cylinder 2 is vertically and downwardly arranged, and the clamping structure is arranged between the cross-bridge supports 4; as Figure 5 shown, the push-pull rod of the cylinder 2 is fixedly connected with a support plate 5 through a connecting frame, the connecting frame is arranged inside the cross-bridge support 4, the connecting frame includes a connecting plate 20 fixedly connected with the push-pull rod, and connecting legs 21 arranged on both sides of the connecting plate 20, and the connecting legs 21 on both sides are respectively fixedly connected to the support plates 5 on both sides of the guide rod 6.

[0037] As Figure 1 、 2 As shown in FIGS. 3 and 4, the clamping structure includes a support plate 5, two guide rods 6 arranged horizontally and in parallel on the support plate 5, a clamping bolt 7, and a thrust fixing plate 8, an exhaust valve limiting push plate 9, two sealing and pressurizing movable plates 11, an exhaust valve limiting movable plate 12, and an exhaust valve limiting fixing plate 13 which are sequentially sleeved on the two guide rods 6 in parallel; wherein the two sealing and pressurizing movable plates 11 and the exhaust valve limiting movable plate 12 are staggered and arranged between the exhaust valve limiting push plate 9 and the exhaust valve limiting fixing plate 13, and the two sealing and pressurizing movable plates 11 adjacent to the exhaust valve limiting push plate 9 and the exhaust valve limiting fixing plate 13 are respectively the sealing and pressurizing movable plates 11; as Figure 3 shown, four differential pressure transmitters 10 are respectively clamped on both sides of the sealing and pressurizing movable plate 11; the thrust fixing plate 8 and the exhaust valve limiting fixing plate 13 are respectively fixed at both ends of the support plate 5, the two ends of the guide rod 6 are respectively fixed on the thrust fixing plate 8 and the exhaust valve limiting fixing plate 13, and the four differential pressure transmitters 10 are all placed between the two guide rods 6; a penetrating thread sleeve 14 is fixedly arranged in the middle of the thrust fixing plate 8, and the screw rod of the clamping bolt 7 is matched with the thread sleeve 14 and the end of the screw rod abuts against the middle of the exhaust valve limiting push plate 9.

[0038] As Figure 1 、 3As shown, a pressure relief valve and a pressure tapping port are provided on the differential pressure transmitter 10. Positioning joints 15 that are hermetically connected to the pressure tapping ports of the differential pressure sensors are respectively provided on both sides of the sealed and pressurized movable plate 11. Limiting structures that cooperate with the pressure relief valve on the differential pressure transmitter 10 are provided on the drain valve limiting push plate 9, the drain valve limiting movable plate 12, and the drain valve limiting fixed plate 13; A pressurization channel 16 that communicates with the positioning joints 15 on both sides is provided inside the sealed stamping movable plate, and a pressurization joint 17 connected to the pressurization channel 16 is provided on the sealed stamping movable plate. The pressurization joint 17 is connected to the intake pipe 18. The positioning joint 15 is trumpet-shaped, and its large head is provided on the stamping and sealing movable plate; An O-ring seal 19 is also provided around the positioning joint 15.

[0039] As Figure 1 shown, a gas path ball valve 22 is provided on the intake pipe 18 fixed to the box body 1. The front-section intake pipe 18 of the gas path ball valve 22 communicates with the pressurization joint 17 on a sealed stamping movable plate, and the rear-section intake pipe 18 of the gas path ball valve 22 communicates with the pressurization joint 17 on another sealed stamping movable plate. The intake pipe 18 is fixedly arranged on the box body 1, and a solenoid valve 23 is provided on the intake pipe 18. The intake pipe 18 is connected to the pressurization joint 17 through a hose 24. A drain switch 25 is provided at the bottom of the water tank 3; A control box 26 for controlling the solenoid valve 23 and the cylinder 2 is provided on the box body 1; Four universal wheels 27 are installed at the bottom of the box body 1.

[0040] Before use, as Figure 2 、 3 shown, the thrust fixing plate 8, the drain valve limiting push plate 9, two sealed and pressurized movable plates 11, the drain valve limiting movable plate 12, and the drain valve limiting fixed plate 13 are successively arranged on the support plate 5 and connected to the guide rod 6. Among them, the drain valve limiting push plate 9, the two sealed stamping movable plates, and the drain valve limiting movable plate 12 can slide on the guide rails between the thrust fixing plate 8 and the drain valve limiting fixed plate 13. As Figure 2 shown, four differential pressure transmitters 10 are respectively arranged between the drain valve limiting push plate 9, the two sealed stamping movable plates, the drain valve limiting movable plate 12, and the drain valve limiting fixed plate 13. Among them, the side of the differential pressure transmitter 10 with the pressure tapping port abuts against the sealed stamping movable plate, and the pressure tapping port is connected to the positioning structure on the sealed and pressurized movable plate 11. Finally, the clamping bolt 7 acts on the drain valve limiting push plate 9. As Figure 2 、 3As shown, push the limit push plate 9 of the discharge valve to the right along the guide rod 6, so as to squeeze the differential pressure transmitter 10 between each fixture. Through the action of the O-ring 19, a sealed environment is formed between the differential pressure transmitter 10 and the intake pipe 18. Open the gas path ball valve 22 and the solenoid valve 23 and ventilate through the intake pipe 18, so that each differential pressure transmitter 10 is connected to the intake pipe 18 and pressurized; under the action of the cylinder 2, the push-pull rod of the cylinder 2 pushes the clamping structure to move downward into the water tank 3 and immerse it in the water, and check whether there is leakage by observing the differential pressure transmitter 10. After the detection is completed, relieve the pressure and lift the clamping structure from the water tank 3 through the cylinder 2.

[0041] In the description of the present invention, it should be understood that if terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, if terms such as "first", "second", etc. are used, they are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, if terms such as "installation", "connection", "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Claims

1. A quick-sealing leak detection tooling for differential pressure transmitters, characterized in that, It includes a box body (1), a cylinder (2) arranged above the box body (1), a clamping structure arranged in the middle of the box body (1) for clamping a differential pressure transmitter (10), and a water tank (3) arranged below the clamping structure; the cylinder (2) is fixed above the box body (1) through a cross-bridge support (4), the push-pull rod of the cylinder (2) is arranged vertically and downward, the clamping structure is arranged between the cross-bridge supports (4), and the push-pull rod of the cylinder (2) is fixedly connected with the clamping structure; The clamping structure includes a support plate (5), two guide rods (6) arranged parallel and horizontally on the support plate (5), a clamping bolt (7), and a thrust fixing plate (8), a drain valve limit push plate (9), a number of sealing and pressurizing movable plates (11), a number of drain valve limit movable plates (12) and a drain valve limit fixing plate (13) which are sequentially sleeved on the two guide rods (6) in parallel; among them, a number of sealing and pressurizing movable plates (11) and a number of drain valve limit movable plates (12) are arranged alternately between the drain valve limit push plate (9) and the drain valve limit fixing plate (13), and the ones adjacent to the drain valve limit push plate (9) and the drain valve limit fixing plate (13) are both sealing and pressurizing movable plates (11); a number of the differential pressure transmitters (10) are respectively clamped on both sides of the sealing and pressurizing movable plates (11); the thrust fixing plate (8) and the drain valve limit fixing plate (13) are respectively fixed at both ends of the support plate (5), the two ends of the guide rod (6) are respectively fixed on the thrust fixing plate (8) and the drain valve limit fixing plate (13), and a number of the differential pressure transmitters (10) are all placed between the two guide rods (6); a penetrating threaded sleeve (14) is fixedly arranged in the middle of the thrust fixing plate (8), the screw rod of the clamping bolt (7) is matched with the threaded sleeve (14) and the end of the screw rod abuts against the middle of the drain valve limit push plate (9); a pressure relief valve and a pressure tapping port are arranged on the differential pressure transmitter (10), positioning joints (15) which are hermetically connected with the pressure tapping ports of the differential pressure sensor are respectively arranged on both sides of the sealing and pressurizing movable plates (11), and limiting structures which are matched with the pressure relief valve on the differential pressure transmitter (10) are arranged on the drain valve limit push plate (9), the drain valve limit movable plates (12) and the drain valve limit fixing plate (13); a pressurizing channel (16) which is communicated with the two positioning joints (15) is arranged in the sealing and pressing movable plate, a pressurizing joint (17) which is connected with the pressurizing channel (16) is arranged on the sealing and pressing movable plate, and the pressurizing joint (17) is connected with an air inlet pipe (18).

2. The quick-sealing leak detection tooling for a differential pressure transmitter according to claim 1, characterized in that, The positioning joint (15) is in a horn shape, and its large head is arranged on the stamping and sealing movable plate; an O-ring seal (19) is also arranged around the positioning joint (15).

3. The quick-sealing leak detection tooling for a differential pressure transmitter according to claim 1, characterized in that, The push-pull rod of the cylinder (2) is fixedly connected to the support plate (5) through a connecting frame. The connecting frame is arranged inside the bridge support (4). The connecting frame includes a connecting plate (20) fixedly connected to the push-pull rod and connecting legs (21) arranged on both sides of the connecting plate (20). The two connecting legs (21) on both sides are respectively fixedly connected to the support plates (5) on both sides of the guide rod (6).

4. A rapid seal leak detection tooling for a differential pressure transmitter according to claim 1, characterized in that, There are two sealing stamping movable plates and one drain valve limit movable plate (12). The upper limit of the number of differential pressure transmitters (10) for leak detection by the leak detection tooling is four. An air circuit ball valve (22) is arranged on the air inlet pipe (18) fixed to the box body (1). The front section of the air inlet pipe (18) of the air circuit ball valve (22) is communicated with the pressure connection (17) on one sealing stamping movable plate, and the rear section of the air inlet pipe (18) of the air circuit ball valve (22) is communicated with the pressure connection (17) on the other sealing stamping movable plate.

5. A quick-sealing leak detection tooling for a differential pressure transmitter as described in claim 1, characterized in that, The air inlet pipe (18) is fixedly arranged on the box body (1). An electromagnetic valve (23) is arranged on the air inlet pipe (18). The air inlet pipe (18) is communicated with the pressure connection (17) through a hose (24).

6. The quick-sealing leak detection tooling for a differential pressure transmitter according to claim 5, characterized in that, A drain switch (25) is arranged at the bottom of the water tank (3). A control box (26) for controlling the electromagnetic valve (23) and the cylinder (2) is arranged on the box body (1). Four universal wheels (27) are installed at the bottom of the box body (1).

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