Water pump cover plate air-tight clamp

Abstract

The utility model relates to water pump cover plate leakproofness test technical field, concretely relates to a water pump cover plate air -tight clamp, the hollow silica gel is set up in the guide inner nut of this design, when retracting pneumatic cylinder drive piston body in the inner retraction clamp outer shaft sleeve moves forward, hollow silica gel will be extruded and make it swell, tightly fit the front end of the deformed metal pipe, realize accurate sealing, simultaneously, the three -axis pneumatic cylinder of support inner top is through the water pump cover plate of pressing mechanism and is pressed, cooperate cover plate air -tight sealing pad and both sides'set pin, ensure the stable positioning of water pump cover plate in the detection process, besides, first air pipe and second air pipe are used for driving piston and ventilation detection respectively, wherein the metal type quick -coupling on first air pipe and the metal type regulating valve on second air pipe improve the connecting efficiency and the regulating accuracy of gas circuit.

Description

Technical Field

[0001] This utility model relates to the field of water pump cover sealing test technology, and in particular to a water pump cover airtight clamp. Background Technology

[0002] In the production process of medium and large displacement water pumps, the pump outlet pipe is mostly a bent metal pipe, which needs to be press-fitted onto the pump cover plate. To ensure the pump's sealing performance, airtightness testing is an essential and crucial step. Traditional airtightness testing fixtures use a cylinder to press polyurethane against the front end of the metal pipe for sealing testing. This method provides a preliminary assessment of the pump cover plate's airtightness, filtering out some substandard products and providing a basis for quality control, thus ensuring the basic performance requirements of the pump products to a certain extent.

[0003] However, after the metal tube is bent, the front end of the tube will undergo a certain stretching deformation, and there is an error in the bending angle of the metal tube, resulting in a certain angle between the front end and the polyurethane. In this case, the polyurethane cannot accurately seal the front end of the metal tube, which often leads to false inspections. False inspections will cause qualified products to be wrongly judged as unqualified, resulting in waste of production resources and reduced production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an airtight clamp for a water pump cover, which aims to solve the technical problem in the prior art where, after the metal pipe is bent, the front end of the pipe will undergo a certain tensile deformation, and the bending angle of the metal pipe will have an error, resulting in a certain angle between the front end and the polyurethane. In this case, the polyurethane cannot accurately seal the front end of the metal pipe, which often leads to false inspections. False inspections will cause qualified products to be wrongly judged as unqualified, resulting in waste of production resources and reduced production efficiency.

[0005] To achieve the above objectives, this utility model employs a water pump cover airtight clamp, comprising a sealing clamp and a bracket. The sealing clamp includes a guide inner nut, a piston body, an inner retraction clamp outer bushing, and a telescopic cylinder. Hollow silicone is disposed within the guide inner nut. The inner retraction clamp outer bushing has a piston chamber, which is connected to a first air inlet pipe and a second air inlet pipe. A three-axis cylinder is disposed at the inner top of the bracket, and a clamping mechanism is disposed at the output end of the three-axis cylinder. A cover airtight gasket is disposed at the inner bottom of the bracket. The guide inner nut is threaded into the inner retraction clamp outer bushing. The piston body is slidably disposed within the inner retraction clamp outer bushing and abuts against one end of the hollow silicone. The inner retraction clamp outer bushing is disposed at the output end of the telescopic cylinder, which is disposed on the bracket and also located on one side of the cover airtight gasket.

[0006] The piston body is provided with a first sealing ring, a second sealing ring and a third sealing ring on its outer side, and the first sealing ring, the second sealing ring and the third sealing ring all abut against the inner wall of the piston cavity.

[0007] The piston body is provided with a first sealing ring, a second sealing ring and a third sealing ring on its outer side, and the first sealing ring, the second sealing ring and the third sealing ring all abut against the inner wall of the piston cavity.

[0008] The clamping mechanism includes multiple clamping rods and a fixing plate. Each clamping rod is coated with polyurethane. The multiple clamping rods are fixedly connected to the fixing plate and located below the fixing plate. The fixing plate is fixedly connected to the three-axis cylinder and located at the output end of the three-axis cylinder.

[0009] The first intake pipe is equipped with a metal quick connector, and the second intake pipe is equipped with a metal regulating valve.

[0010] This utility model discloses an airtight clamp for a water pump cover. The inner nut of the guide is fitted with hollow silicone. When the telescopic cylinder drives the piston body within the outer bushing of the inner clamp forward, it compresses the hollow silicone, causing it to expand and tightly fit the deformed front end of the metal tube, achieving an accurate seal. Simultaneously, the three-axis cylinder at the top of the bracket presses the water pump cover through the clamping mechanism, working in conjunction with the cover's airtight gasket and the positioning pins on both sides to ensure stable positioning of the water pump cover during testing. Furthermore, the first and second air inlets are used to drive the piston and for airflow detection, respectively. The metal quick-connect fitting on the first air inlet and the metal regulating valve on the second air inlet improve the connection efficiency and adjustment accuracy of the air circuit, allowing the clamp to adapt to the actual deformation of the metal tube, improving the accuracy of airtightness testing, avoiding false detections due to inadequate sealing, thereby saving production resources and improving production efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a three-dimensional perspective view of the airtight clamp for the water pump cover of this utility model.

[0013] Figure 2This is the front view of the water pump cover airtight clamp of this utility model.

[0014] Figure 3 This is a front view of the sealing clamp in the airtight clamp for the water pump cover of this utility model.

[0015] Figure 4 This is the utility model Figure 3 A cross-sectional view along line AA in the middle.

[0016] Figure 5 This is a three-dimensional perspective view of the airtight clamp for the water pump cover plate of this utility model in use.

[0017] 1-Sealing clamp, 2-Bracket, 3-Guide inner nut, 4-Piston body, 5-Inner clamp outer bushing, 6-Telescopic cylinder, 7-Hollow silicone, 8-Piston chamber, 9-First air inlet pipe, 10-Second air inlet pipe, 11-Triaxial cylinder, 12-Metal type regulating valve, 13-Cover plate gasket, 14-First sealing ring, 15-Second sealing ring, 16-Third sealing ring, 17-Positioning pin, 18-Pressure rod, 19-Fixing plate, 20-Polyurethane coating, 21-Metal type quick connector, 22-Water pump cover plate assembly. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1 to 5 This utility model provides a water pump cover airtight clamp, including a sealing clamp 1 and a bracket 2. The sealing clamp 1 includes a guide inner nut 3, a piston body 4, an inner retraction clamp outer bushing 5, and a telescopic cylinder 6. The guide inner nut 3 is provided with hollow silicone 7. The inner retraction clamp outer bushing 5 has a piston cavity 8, and the piston cavity 8 is connected to a first air inlet pipe 9 and a second air inlet pipe 10. The bracket 2 is provided with a three-axis cylinder 11 at its inner top, and a clamping mechanism is provided at the output end of the three-axis cylinder 11. The bracket 2 is provided with a cover airtight gasket 13 at its inner bottom. The guide inner nut 3 is threaded in the inner retraction clamp outer bushing 5. The piston body 4 is slidably disposed in the inner retraction clamp outer bushing 5 and abuts against one end of the hollow silicone 7. The inner retraction clamp outer bushing 5 is disposed at the output end of the telescopic cylinder 6. The telescopic cylinder 6 is disposed on the bracket 2 and is also located on one side of the cover airtight gasket 13.

[0020] In this embodiment, the sleeve-type sealing structure of the sealing clamp 1 directly adapts to the deformed front end face of the metal tube after bending, solving the problem of inadequate sealing caused by tube end deformation and angle error in traditional polyurethane pressure blocks; the telescopic cylinder 6 drives the sealing clamp 1 to accurately fit into the metal tube, and in conjunction with the three-axis cylinder 11 clamping mechanism of the bracket 2, a high degree of consistency between the testing environment and the actual installation conditions is achieved, significantly reducing the false detection rate and improving the reliability of airtightness testing.

[0021] Furthermore, a first sealing ring 14, a second sealing ring 15, and a third sealing ring 16 are provided on the outer side of the piston body 4, and the first sealing ring 14, the second sealing ring 15, and the third sealing ring 16 all abut against the inner wall of the piston cavity 8.

[0022] In this embodiment, the three sealing rings form a graded sealing structure, which effectively prevents the detection gas from leaking from the gap between the piston body 4 and the inner shrinking fixture outer bushing 5. This design not only improves the accuracy of airtightness detection, but also enhances the durability of the fixture through a redundant sealing mechanism, reducing repeated testing and workpiece wear caused by seal failure.

[0023] Furthermore, both sides of the cover gasket 13 are provided with positioning pins 17 adapted to the water pump cover assembly.

[0024] In this embodiment, the positioning pin 17, through precise cooperation with the water pump cover assembly, ensures the positional stability of the workpiece during the testing process and avoids misalignment of the sealing surface caused by workpiece displacement.

[0025] Furthermore, the clamping mechanism includes a plurality of clamping rods 18 and a fixing plate 19. Each clamping rod 18 is provided with a polyurethane coating 20. The plurality of clamping rods 18 are respectively fixedly connected to the fixing plate 19 and located below the fixing plate 19. The fixing plate 19 is fixedly connected to the three-axis cylinder 11 and located at the output end of the three-axis cylinder 11.

[0026] In this embodiment, the polyurethane-coated clamping rod 18 absorbs minor unevenness on the workpiece surface through elastic deformation, and provides uniform pressure distribution under the drive of the triaxial cylinder 11. Compared with rigid clamping blocks, this design avoids workpiece damage caused by excessive local pressure, and ensures the reliability of large-area sealing through multi-point clamping, making it particularly suitable for the inspection of water pump cover plates with complex curved surfaces.

[0027] Furthermore, a metal quick connector 21 is provided on the first air intake pipe 9, and a metal regulating valve 12 is provided on the second air intake pipe 10.

[0028] In this embodiment, the metal quick connector 21 enables second-level insertion and removal of the detection air path, significantly shortening equipment changeover time; the metal regulating valve 12 precisely controls the air pressure and flow rate of the second air inlet pipe 10, ensuring adjustable detection pressure for pump cover plates of different specifications. The combined effect of these two mechanisms enables the fixture to quickly adapt to a variety of products, improving the flexibility of the production line.

[0029] In this invention, the water pump cover is first placed on the cover gas seal gasket 13 at the bottom of the bracket 2, and is precisely positioned by the positioning pins 17 on both sides. Then, the three-axis cylinder 11 is activated, driving the fixing plate 19 of the pressing mechanism to press down multiple pressing rods 18, so that the polyurethane coating 20 elastically adheres to the surface of the water pump cover to form a large-area seal. At the same time, the telescopic cylinder 6 pushes the inner retracting clamp outer bushing 5 of the sealing clamp 1 into the metal tube. At this time, air is introduced into the first air inlet pipe 9, and the piston body 4, under the action of air pressure, squeezes the hollow silicone 7 in the guide inner nut 3 to expand, tightly wrapping the deformed tube end to achieve a seal. At this time, air is introduced into the second air inlet pipe 10, allowing air to enter the product cavity for airtightness testing.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. An airtight clamp for a water pump cover, characterized in that, The device includes a sealing clamp and a bracket. The sealing clamp includes a guide inner nut, a piston body, an inner clamp outer bushing, and a telescopic cylinder. The guide inner nut contains hollow silicone. The inner clamp outer bushing has a piston chamber, which is connected to a first air inlet pipe and a second air inlet pipe. The bracket has a three-axis cylinder at its inner top, with a clamping mechanism at its output end. The bracket has a cover plate gasket at its inner bottom. The guide inner nut is threaded into the inner clamp outer bushing. The piston body is slidably disposed within the inner clamp outer bushing and abuts against one end of the hollow silicone. The inner clamp outer bushing is located at the output end of the telescopic cylinder, which is mounted on the bracket and also located on one side of the cover plate gasket.

2. The airtight clamp for the water pump cover as described in claim 1, characterized in that, The piston body is provided with a first sealing ring, a second sealing ring and a third sealing ring on its outer side, and the first sealing ring, the second sealing ring and the third sealing ring all abut against the inner wall of the piston cavity.

3. The airtight clamp for the water pump cover as described in claim 2, characterized in that, Both sides of the cover plate gasket are provided with positioning pins adapted to the water pump cover plate assembly.

4. The airtight clamp for the water pump cover as described in claim 3, characterized in that, The clamping mechanism includes multiple clamping rods and a fixing plate. Each clamping rod is coated with polyurethane. The multiple clamping rods are fixedly connected to the fixing plate and located below the fixing plate. The fixing plate is fixedly connected to the three-axis cylinder and located at the output end of the three-axis cylinder.

5. The airtight clamp for the water pump cover plate as described in claim 4, characterized in that, The first intake pipe is equipped with a metal quick connector, and the second intake pipe is equipped with a metal regulating valve.

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