Air tightness detection tool

Abstract

The utility model discloses an air tightness detection tool which comprises clamping plates arranged at intervals in the front-back direction, the clamping plates are provided with sealing membranes attached to the front end and the rear end of a valve, the sealing membranes are provided with air holes, and the air holes are communicated with the interior of the valve. The front clamping plate and the rear clamping plate are connected with an interlocking assembly which is used for adjusting the distance between the front clamping plate and the rear clamping plate and locking the distance between the front clamping plate and the rear clamping plate so that the front clamping plate and the rear clamping plate can be attached to the front end face and the rear end face of the valve. And the positioning assembly is used for positioning the valve. Under the action of the interlocking assembly, the front sealing membrane and the rear sealing membrane are attached to the front end and the rear end of the valve, then the air hole of one sealing membrane is connected with the air inlet element, and the air hole of the other sealing membrane is connected with the pressure testing element. The valve is closed, air enters from one end, pressure is detected at the other end, and when air leakage exists in the valve, it is judged that the valve is not completely sealed in the closed state by detecting the pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valve air tightness detection, in particular to an air tightness detection tool. Background Art

[0002] Existing valve air tightness testing equipment, such as the Chinese invention patent application with publication number CN 105043675A, discloses a ball valve air tightness testing device designed to provide convenient operation, highly accurate test results, and protection against pinching damage to both ends of the ball valve. The device comprises an air supply pump, an air pressure sensor, a main frame, two push plate cylinders, two side frames, a primary end cap, and a secondary end cap. The two push plate cylinders are mounted on the side frames, respectively. The piston rod of one push plate cylinder is connected to the primary end cap, while the piston rod of the other push plate cylinder is connected to the secondary end cap. The primary end cap is equipped with a primary elastic sealing ring gasket, the secondary end cap is equipped with a secondary elastic sealing ring plate, and the primary end cap has a primary cap air hole.

[0003] Based on the above, in the existing technology, two front and rear push-plate cylinders drive the end cover to clamp the valve body for testing. The technical problem with this testing equipment is that it requires push cylinders to drive the clamping, resulting in a complex overall structure and high manufacturing costs. This is not conducive to small-scale testing and needs further improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an airtightness detection tool with a simple structure and low manufacturing cost.

[0005] An airtightness testing tool designed for this purpose includes a clamping plate spaced apart at a front and a rear, a sealing diaphragm provided on the clamping plate that fits the front and rear ends of the valve, and an air hole provided on the sealing diaphragm that communicates with the interior of the valve.

[0006] The front and rear clamping plates are connected with an interlocking assembly, which is used to adjust the distance between the front and rear clamping plates and lock the distance between the front and rear clamping plates so that the front and rear clamping plates fit the front and rear end surfaces of the valve;

[0007] Also included is a positioning assembly for positioning the valve.

[0008] Preferably, the splint is provided with a plurality of through holes, and the interlocking assembly includes a plurality of screws, which are passed through the through holes of the front and rear splints. The front and rear ends of the screws are threadedly connected with locking nuts, and the front and rear splints are arranged between the front and rear locking nuts, and the locking nuts are abutted against the wall of the splint facing away from the other splint.

[0009] Preferably, the positioning assembly includes a fixing frame, the fixing frame is provided with a positioning plate, and the positioning plate is provided with a positioning hole for inserting and positioning the valve stem.

[0010] Compared to existing technologies, this new design utilizes an interlocking assembly to mate two sealing diaphragms with the front and rear ends of the valve. The pores of one sealing diaphragm are then connected to an air intake element, while the pores of the other sealing diaphragm are connected to a pressure testing element. The valve is closed, air is admitted through one end, and pressure is measured at the other. If the valve leaks, the pressure measurement indicates that the valve is not fully sealed in its closed state. This new design also incorporates a positioning assembly to assist in positioning the valve, ensuring its stability during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is one of the three-dimensional structural diagrams of the inspection tooling;

[0012] Figure 2 This is the second schematic diagram of the three-dimensional structure of the inspection tooling;

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the inspection tooling;

[0014] Figure 4 This is one of the schematic diagrams of the assembly status of the valve and the inspection tooling;

[0015] Figure 5 This is the second schematic diagram of the assembly status of the valve and testing tooling. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] See also Figure 1-Figure 5 An airtightness testing tool includes a clamping plate 110 spaced apart at a front and a rear. The clamping plate 110 is provided with a sealing diaphragm 111 that fits the front and rear ends of the valve 30. The sealing diaphragm 111 is provided with an air hole 112, and the air hole 112 is connected to the interior of the valve 30.

[0018] The front and rear clamping plates 110 are connected to an interlocking assembly 100, which is used to adjust the distance between the front and rear clamping plates 110 and lock the distance between the front and rear clamping plates 110 so that the front and rear clamping plates 110 fit the front and rear end surfaces of the valve 30;

[0019] The device further comprises a positioning assembly 20 for positioning the valve 30 .

[0020] Based on the above embodiment, with the help of an interlocking assembly, two front and rear sealing diaphragms are attached to the front and rear ends of the valve. The air holes of one sealing diaphragm are then connected to an air inlet element, while the air holes of the other sealing diaphragm are connected to a pressure testing element. The valve is closed, air is admitted at one end, and the pressure is tested at the other end. If the valve leaks, the pressure test indicates that the valve is not completely sealed when closed. This utility model uses a positioning assembly to assist in positioning the valve, ensuring its stability during testing.

[0021] See also Figure 1-Figure 5 The splint 110 is provided with a plurality of through holes 113, and the interlocking assembly 100 includes a plurality of screws 120, which are passed through the through holes 113 of the front and rear splints 110. The front and rear ends of the screws 120 are threadedly connected with locking nuts 130, and the front and rear splints 110 are arranged between the front and rear locking nuts 130, and the locking nuts 130 are abutted against the wall of the splint 110 facing away from the other splint 110.

[0022] During assembly, the splints 110 are conveniently placed on the front and rear sides of the valve 30, and then the screws 120 are inserted into the two splints 110 in turn, and then the locking nuts 130 are locked into the two ends of the screws 120. By tightening the locking nuts 130, the front and rear splints 110 are clamped on the front and rear valve end faces 300 of the valve 30.

[0023] See also Figure 2 and Figure 4 The positioning assembly 20 includes a fixing frame 210, which is provided with a positioning plate 220. The positioning plate 220 is provided with a positioning hole 230 for inserting and positioning the valve stem 310. The positioning hole 230 is inserted and matched with the valve stem 310, which can constrain the left and right movement and the front and back movement of the valve 30, ensuring the stability of the valve 30.

[0024] In the present invention, the sealing diaphragm 111 is a rubber sheet that can fully fit the valve end face 300 to ensure the sealing performance of both ends of the valve 30 and the accuracy of the detection.

[0025] In the present invention, the clamping plate 110 is a square plate. A mounting hole is provided in the clamping plate 110 and passes through the clamping plate 110 from front to back. The sealing diaphragm 111 is provided in the mounting hole.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An airtightness detection tool, characterized by: The valve (30) comprises a clamping plate (110) spaced apart at a front and a rear, a sealing diaphragm (111) provided on the clamping plate (110) and fitted with the front and rear ends of the valve (30), the sealing diaphragm (111) being provided with an air hole (112), the air hole (112) being in communication with the interior of the valve (30); The front and rear clamping plates (110) are connected to an interlocking assembly (100), and the interlocking assembly (100) is used to adjust the distance between the front and rear clamping plates (110) and lock the distance between the front and rear clamping plates (110) so that the front and rear clamping plates (110) fit in contact with the front and rear end surfaces of the valve (30); It also includes a positioning assembly (20) for positioning the valve (30).

2. The airtightness detection tool according to claim 1, characterized in that: The splint (110) is provided with a plurality of through holes (113), and the interlocking assembly (100) includes a plurality of screws (120), which are passed through the through holes (113) of the front and rear splints (110), and the front and rear ends of the screws (120) are threadedly connected with locking nuts (130), and the front and rear splints (110) are arranged between the front and rear locking nuts (130), and the locking nuts (130) are abutted against the wall of the splint (110) facing away from the other splint (110).

3. The airtightness testing tool according to claim 1, characterized in that: The positioning assembly (20) comprises a fixing frame (210), the fixing frame (210) is provided with a positioning plate (220), and the positioning plate (220) is provided with a positioning hole (230) for inserting and positioning with the valve stem (310).

4. The airtightness testing tool according to claim 1, characterized in that: The sealing diaphragm (111) is a rubber sheet.

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