Clamping plate type rapid leak detection tool

Abstract

The utility model belongs to the field of air tightness detection of automobile air conditioners, and relates to a clamping plate type rapid leak detection tool, which comprises a connecting pipe, a sealing element arranged in the connecting pipe, a clamping plate rotationally connected in the connecting pipe, and a pressing plate movably connected with the clamping plate, the clamping plate is arranged on one side of the sealing piece, the end, facing the clamping plate, of the connecting pipe is a connecting end, one end of the clamping plate is rotationally connected with the connecting pipe through a rotating shaft parallel to the connecting pipe, a guiding sliding groove is formed in the clamping plate, and a guiding column matched with the guiding sliding groove is arranged on the pressing plate. The guide column is driven by the pressing plate to move in the radial direction of the connecting pipe in the guide sliding groove, and the clamping plate is guided to rotate around the rotating shaft, so that the clamping plate moves away from or close to the center of the connecting pipe; the pressing plate is pressed in the direction close to the connecting pipe, the clamping plate moves away from the center of the connecting pipe, and the connecting end and the to-be-tested pipe fitting are connected in a sealed mode through the sealing piece; the pressing plate is reset, the clamping plate moves close to the center of the connecting pipe, and the clamping plate and the pipe fitting to be tested form axial limiting connection.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air conditioning air tightness testing, and relates to a plate-type rapid leak detection tool. Background Technology

[0002] In the automotive manufacturing industry, the airtightness inspection of pipes is a crucial step in ensuring vehicle safety and reliability. As vital components in automotive systems that transmit fluids (such as fuel, coolant, and brake fluid), the sealing performance of pipes directly affects the overall operation and lifespan of the vehicle. Therefore, rigorous airtightness testing of pipes is an indispensable step in the production process. Currently, the automotive industry primarily uses a handheld inspection method for pipe airtightness testing. This involves an operator holding the pipe and introducing high-pressure gas into one end, then observing or detecting any gas leaks to determine the pipe's seal. However, this method has several shortcomings. First, the connection between the high-pressure gas hose and the pipe is often not secure enough, easily loosening or detaching during testing, leading to gas leaks and affecting the accuracy of the test. Second, the handheld inspection method is unstable; the operator's technique and pressure are difficult to maintain consistently, resulting in a degree of subjectivity and uncertainty in the test results.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN219996434U discloses an airtightness testing device. This device includes a connecting rod and a clamping rod mounted on the connecting rod in a lever-like manner. One end of the clamping rod is a pressing part, and the other end is a locking part, with its connection point to the connecting rod located between the pressing part and the locking part. The end of the connecting rod facing the locking part is a connecting end, which has a relief groove for connecting the pipe to be tested. A sealing element for sealing the pipe to be tested is provided within the relief groove. The connecting rod has a gas channel communicating with the relief groove. By pressing the pressing part towards the connecting rod, the locking part is lifted, sealing the connecting end with the pipe to be tested. Gas is then introduced into the pipe to be tested through the gas channel to detect its airtightness. In use, the device is first opened by squeezing the clamping rod and handle, then aligned with the pipe opening and pushed towards the pipe to be tested along the axial direction. When the clearance groove of the fixture exceeds the protruding rib of the workpiece, release your hand. Under the action of the torsion spring, the clamping rod returns to its original position, and the clearance groove is precisely locked at the protruding rib of the pipe fitting. When compressed air is introduced into the workpiece, the fixture will retract under the internal pressure of the workpiece, but because the rib on the workpiece is locked by the clearance groove, the reaction force is overcome. The O-ring seal, in cooperation with the pipe fitting and the sealing ring bushing, achieves the function of quickly sealing the product. After the test is completed, simply squeeze the clamping rod and handle again and pull out the fixture along the axial direction. Although this airtightness testing device solves the problems of handheld inspection methods to a certain extent, it also has some shortcomings. First, the structure of the device is relatively complex, and the manufacturing process is cumbersome, resulting in high production costs. Second, due to the complex structure, maintenance is also relatively difficult, and once a malfunction occurs, repair is difficult and costly.

[0004] Therefore, there is still an urgent need to develop an airtightness testing device for pipe fittings that is simple in structure, easy to operate, has good sealing effect, and is low in cost. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a quick leak detection tool with a card plate to improve the efficiency of airtightness inspection of the pipe fittings to be tested.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick leak detection tool with a clamping plate includes a connecting pipe, a sealing element disposed in the connecting pipe, a clamping plate rotatably connected in the connecting pipe, and a pressure plate movably connected to the clamping plate;

[0008] The clamping plate is arranged on one side of the sealing element. The end of the connecting pipe facing the clamping plate is the connecting end. One end of the clamping plate is rotatably connected to the connecting pipe through a rotating shaft parallel to the connecting pipe. A guide groove is provided on the clamping plate. A guide post matching the guide groove is provided on the pressure plate. The pressure plate drives the guide post to make radial displacement of the connecting pipe in the guide groove, guiding the clamping plate to rotate around the rotating shaft, so that the clamping plate moves away from or closer to the center of the connecting pipe.

[0009] Press the pressure plate toward the connecting pipe, and the clamping plate moves away from the center of the connecting pipe, sealing the connecting end with the pipe to be tested through the sealing element.

[0010] The pressure plate is reset, the clamping plate is displaced closer to the center of the connecting pipe, and the clamping plate forms an axial limiting connection with the pipe to be tested.

[0011] Furthermore, the card plate consists of two pieces, which are symmetrically arranged in the connecting pipe.

[0012] Furthermore, the pressure plate is inverted U-shaped and vertically spans the connecting pipe to correspondingly and movably connect the two pressure plates.

[0013] Furthermore, a spring for resetting the pressure plate is provided between the pressure plate and the connecting pipe.

[0014] Furthermore, a pressing plate is provided on the upper part of the pressure plate.

[0015] Furthermore, the sealing element is at least two O-rings arranged side by side in the connecting pipe.

[0016] Furthermore, the card plate has an arc-shaped structure, and an arc-shaped through groove is provided on the wall of the connecting pipe to install the card plate.

[0017] Furthermore, a vertical sliding groove is provided on the outer wall of the connecting pipe, and a limiting slider matching the vertical sliding groove is provided on the pressure plate to guide the pressure plate to make radial displacement of the connecting pipe.

[0018] Furthermore, an air pipe connector is provided at the end of the connecting pipe away from the card plate.

[0019] Furthermore, the guide groove is an arc-shaped groove, and the distance between the lower end of the arc-shaped groove and the axis of the connecting pipe is less than the distance between the upper end of the arc-shaped groove and the axis of the connecting pipe.

[0020] The beneficial effects of this utility model are as follows:

[0021] Simplified structure and reduced cost: The linkage design of the clamping plate and the pressure plate replaces the traditional lever-type complex structure, reducing the number of parts and significantly reducing processing and assembly costs.

[0022] Easy and efficient operation: The pallet can be quickly opened and closed with a single hand press, without the need for additional tools. The time spent on installation and disassembly is greatly reduced, making it suitable for high-frequency use on the production line.

[0023] Enhanced sealing reliability: The double O-ring design creates redundant sealing, ensuring airtightness even if a single ring fails; the rigid limiting action of the clamping plate with the protruding rib of the pipe fitting after closure effectively resists the reaction force of high-pressure gas and prevents tooling from falling off.

[0024] Easy maintenance: The modular design allows for the individual replacement of vulnerable parts such as the card plate and O-ring seals, resulting in low maintenance costs.

[0025] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is an isometric view of a card-type rapid leak detection tool according to the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a card-type rapid leak detection tool according to the present invention;

[0029] Figure 3 for Figure 2 The left view;

[0030] Figure 4 for Figure 2 AA section view;

[0031] Figure 5 This is an exploded view of a pallet-type rapid leak detection tool according to this utility model;

[0032] Figure 6 This is a schematic diagram of the installation state of a card-type rapid leak detection tool according to this utility model.

[0033] Figure 7 This is a schematic diagram of the installation state of a card-type quick leak detection tool according to this utility model.

[0034] Reference numerals: 1-connecting pipe, 2-clamping plate, 21-guide groove, 3-pressure plate, 31-guide post, 32-limiting slider, 33-pressing plate, 4-air pipe connector, 5-spring, 6-rotating shaft, 7-arc-shaped through groove, 8-O-ring seal, 9-vertical groove. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Please see Figures 1-5 A quick leak detection tool with a clamping plate includes a connecting pipe 1, a sealing element disposed in the connecting pipe 1, a clamping plate 2 rotatably connected in the connecting pipe 1, and a pressure plate 3 movably connected to the clamping plate 2.

[0039] The clamping plate 2 is arranged on one side of the sealing element, and the end of the connecting pipe 1 facing the clamping plate 2 is the connecting end. One end of the clamping plate 2 is rotatably connected to the connecting pipe 1 via a rotating shaft 6 parallel to the connecting pipe 1, and a guide groove 21 is provided on the clamping plate 2. A guide post 31 matching the guide groove 21 is provided on the pressure plate 3. The pressure plate 3 drives the guide post 31 to make radial displacement of the connecting pipe 1 in the guide groove 21, guiding the clamping plate 2 to rotate around the rotating shaft 6, so that the clamping plate 2 moves away from or closer to the center of the connecting pipe 1.

[0040] In this embodiment, there are two clamping plates 2, symmetrically arranged in the connecting pipe 1 to enhance the stability and clamping force of the tooling. The pressure plate 3 is inverted U-shaped and vertically spans the connecting pipe 1, correspondingly and movably connecting the two clamping plates 2 for synchronous operation. A spring 5 is provided between the pressure plate 3 and the connecting pipe 1 for resetting the pressure plate 3. When the external force is released, the spring 5 automatically pushes the pressure plate 3 to reset, thereby causing the clamping plates 2 to clamp the pipe fitting to be tested. A pressing plate 33 is also provided on the upper part of the pressure plate 3 to facilitate the operator applying pressure. The sealing element consists of at least two parallel O-rings 8 arranged in the connecting pipe 1 to ensure a sealing effect. The clamping plates 2 have an arc-shaped structure and an arc-shaped through groove 7 on the wall of the connecting pipe 1 for mounting the clamping plates 2, allowing them to rotate smoothly. A vertical groove 9 is provided on the outer wall of the connecting pipe 1, and a limiting slider 32 matching the vertical groove 9 is provided on the pressure plate 3 to guide the pressure plate 3 to make radial displacement of the connecting pipe 1, ensuring that the movement of the pressure plate 3 is stable and accurate. An air pipe connector 4 is provided at the end of the connecting pipe 1 away from the clamping plate 2 for connecting an air source and introducing high-pressure gas into the pipe to be tested for air tightness testing. The guiding groove 21 is an arc-shaped groove, and the distance between the lower end of the arc-shaped groove and the axis of the connecting pipe 1 is less than the distance between the upper end of the arc-shaped groove and the axis of the connecting pipe 1. This design allows the clamping plate 2 to open outward when the pressure plate 3 is pressed, making it easy to insert the connecting end into the pipe to be tested; and when the pressure plate 3 is reset, the clamping plate 2 retracts inward, contacting the rib on the pipe to be tested to form an axial limit.

[0041] Specifically, the connecting pipe 1 is a hollow tubular structure, with one end serving as the connecting end for a sealed connection with the pipe fitting to be tested; the other end is equipped with a gas pipe connector 4 for connecting high-pressure gas. Two symmetrical arc-shaped grooves 7 are formed on the wall of the connecting pipe 1 for mounting the clamping plate 2. The clamping plate 2 consists of two symmetrically arranged arc-shaped plates, rotatably connected to the arc-shaped grooves 7 of the connecting pipe 1 via a rotating shaft 6. The rotating shaft 6 is detachably connected to both the connecting pipe 1 and the clamping plate 2, specifically using countersunk bolts for easy maintenance and replacement of components. The inner side of the clamping plate 2 is provided with a guide groove 21 (contour groove), the lower end of which is less than the distance from the axis of the connecting pipe 1 than the upper end, forming an inclined guide structure. The pressure plate 3 has an inverted U-shaped structure and is vertically mounted above the connecting pipe 1. The pressure plate 3 has guide posts 31 on both sides, which cooperate with the guide grooves 21 of the clamping plate 2; the inner side of the pressure plate 3 also has a limiting slider 32, which slides in cooperation with the vertical groove 9 on the outer wall of the connecting pipe 1 to ensure that the pressure plate 3 moves stably in the radial direction. The top of the pressure plate 3 has a pressing plate 33 for easy manual operation. The reset spring 5 is set between the pressure plate 3 and the connecting pipe 1 to drive the pressure plate 3 to reset. The sealing assembly includes at least two O-rings 8 arranged in parallel, which are embedded in the connecting end of the connecting pipe 1 to form a multiple seal with the pipe to be tested.

[0042] The working principle of this tooling is as follows: when the pressure plate 3 is pressed, the guide post 31 slides along the guide groove 21, forcing the clamping plate 2 to rotate outward around the rotating shaft 6 (away from the center of the connecting pipe 1); after the pressure plate 3 is released, the reset spring 5 pushes the pressure plate 3 to reset, the guide post 31 slides in the opposite direction, driving the clamping plate 2 to rotate inward and close (close to the center of the connecting pipe 1), thus achieving axial limiting.

[0043] Its usage method is as follows:

[0044] This fixture is suitable for airtightness testing of tubular parts with raised ribs. The specific operating steps are as follows:

[0045] Tooling preparation: Connect the air pipe connector 4 to the external high-pressure air source and ensure that the O-ring seal 8 is unworn.

[0046] Opening the clamping plates: Hold the connecting tube 1, press the pressing plate 33 with your thumb, the pressing plate 3 moves down, the guide post 31 slides along the guide groove 21, driving the two clamping plates 2 to rotate outward around the rotating shaft 6 and unfold. Figure 6 state).

[0047] Installation tooling: Align the connecting end of connecting pipe 1 with the opening of the pipe fitting to be tested, and push it in along the axial direction until the connecting end touches the bottom of the pipe fitting. At this time, the protruding rib of the pipe fitting to be tested is located on the outside of the clamping plate 2.

[0048] Closure and Locking: Release the pressing plate 33, the return spring 5 pushes the pressing plate 3 upward, the guide post 31 drives the clamping plate 2 to rotate inward and close, the arc-shaped edge of the clamping plate 2 clamps the protruding rib of the pipe fitting, forming an axial limit ( Figure 7 state).

[0049] Air tightness test: Compressed air is introduced into the pipe to be tested through the air connector 4, and the O-ring 8 fits tightly against the inner wall of the pipe to achieve a seal. If there is a leak in the pipe, the fixture will move slightly backward due to internal pressure, but the limiting effect of the clamping plate 2 and the raised rib can offset the reaction force and ensure the stability of the seal.

[0050] Disassembling the fixture: After the inspection is completed, press the pressing plate 33 again to open the clamping plate 2, and pull out the fixture along the axial direction.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pallet-type rapid leak detection tool, characterized in that: It includes a connecting pipe, a sealing element disposed in the connecting pipe, a clamping plate rotatably connected in the connecting pipe, and a pressure plate movably connected to the clamping plate; The clamping plate is arranged on one side of the sealing element. The end of the connecting pipe facing the clamping plate is the connecting end. One end of the clamping plate is rotatably connected to the connecting pipe through a rotating shaft parallel to the connecting pipe. A guide groove is provided on the clamping plate. A guide post matching the guide groove is provided on the pressure plate. The pressure plate drives the guide post to make radial displacement of the connecting pipe in the guide groove, guiding the clamping plate to rotate around the rotating shaft, so that the clamping plate moves away from or closer to the center of the connecting pipe. Press the pressure plate toward the connecting pipe, and the clamping plate moves away from the center of the connecting pipe, sealing the connecting end with the pipe to be tested through the sealing element. The pressure plate is reset, the clamping plate is displaced closer to the center of the connecting pipe, and the clamping plate forms an axial limiting connection with the pipe to be tested.

2. The quick leak detection fixture of the card plate type according to claim 1, characterized in that: The card plate consists of two pieces, which are arranged symmetrically in the connecting pipe.

3. The quick leak detection fixture of the pallet type according to claim 2, characterized in that: The pressure plate is inverted U-shaped and vertically straddles the connecting pipe to movably connect the two pressure plates.

4. The quick leak detection fixture of the pallet type according to claim 3, characterized in that: A spring for resetting the pressure plate is provided between the pressure plate and the connecting pipe.

5. The quick leak detection fixture of the pallet type according to claim 3, characterized in that: A pressing plate is also provided on the upper part of the pressure plate.

6. The quick leak detection fixture of the card plate type according to claim 1, characterized in that: The sealing element is at least two O-rings arranged side by side in the connecting pipe.

7. The quick leak detection fixture of the pallet type according to claim 1, characterized in that: The card plate has an arc-shaped structure, and an arc-shaped through groove is provided on the wall of the connecting pipe to install the card plate.

8. The quick leak detection fixture of the pallet type according to claim 7, characterized in that: A vertical sliding groove is provided on the outer wall of the connecting pipe, and a limiting slider matching the vertical sliding groove is provided on the pressure plate to guide the pressure plate to make radial displacement of the connecting pipe.

9. The quick leak detection fixture of the pallet type according to claim 1, characterized in that: An air pipe connector is provided at the end of the connecting pipe away from the card plate.

10. The quick leak detection fixture of the card plate type according to claim 1, characterized in that: The guide groove is an arc-shaped groove, and the distance between the lower end of the arc-shaped groove and the axis of the connecting pipe is less than the distance between the upper end of the arc-shaped groove and the axis of the connecting pipe.

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