Air tightness detection device

Abstract

The utility model provides an air tightness detection device which comprises a supporting plate, the supporting plate is provided with a plurality of groups of detection air channels, and each detection air channel comprises a detection hole and a water injection hole which are communicated with each other; a to-be-detected workpiece is mounted on the supporting plate, and a detection opening of the to-be-detected workpiece correspondingly extends into the detection hole; a one-way valve flowing towards the air inlet is mounted in the detection port; a gas inlet of the to-be-tested workpiece is communicated with an external gas source through a gas transmission assembly, and gas is conducted or cut off by adjusting the gas transmission assembly; the tool provides a preset installation part for a to-be-detected workpiece, can be quickly assembled and accurately matched with a detection part, is convenient to use and operate, and can effectively improve the overall detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing devices, and more specifically, to an airtightness testing device. Background Technology

[0002] In aero-engines and gas turbines, the airtightness of additively manufactured parts is a key performance indicator, making airtightness testing crucial. Currently, the airtightness testing of additively manufactured parts mainly involves manually blocking the airflow channels and then immersing them in water for testing. If the sealing is not tight, it will affect the accuracy of the test results. Moreover, the operation of multi-channel parts is cumbersome, and the workload is large and the efficiency is low when testing batches of parts. Therefore, improvements are needed. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose an airtightness testing device, which provides a preset installation position for the workpiece to be tested, can be quickly assembled, accurately match the testing position, is easy to use and operate, and can effectively improve the overall testing efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides an airtightness testing device, including a tray with multiple sets of testing air channels, each including interconnected testing holes and water injection holes; a workpiece to be tested is mounted on the tray, with the testing port of the workpiece correspondingly extending into the testing hole; a one-way valve is installed in the testing port, flowing towards the air inlet; the air inlet of the workpiece to be tested is connected to an external air source through an air supply assembly, and the air supply assembly can be adjusted to allow or cut off the flow of gas.

[0006] In a preferred embodiment of this invention, the gas delivery assembly includes a gas delivery hose, a pipe connector installed at one end of the gas delivery hose, and a shut-off valve installed at the other end of the gas delivery hose, which is connected to an external gas source; the pipe connector is connected to the air inlet of the workpiece to be tested.

[0007] In a preferred embodiment of this utility model, a support plate is provided on one side of the tray, and the support plate is provided with multiple through holes for installing the shut-off valve.

[0008] In a preferred embodiment of this invention, the side wall of the pallet away from the support plate is provided with multiple machining holes, which are used for conducting detection holes and water injection holes; a plug is installed at the outer end of the machining hole.

[0009] In a preferred embodiment of this invention, the water injection hole includes a first hole section and a second hole section that are interconnected, with the bottom end of the second hole section connected to the machining hole; the diameter of the second hole section is smaller than the diameter of the machining hole, and the diameter of the first hole section is larger than the diameter of the machining hole.

[0010] The beneficial effects of this utility model are as follows:

[0011] This utility model provides an airtightness testing device, including a tray with multiple sets of testing air channels, each including interconnected testing holes and water injection holes. The workpiece to be tested is mounted on the tray, with its testing port corresponding to the testing hole. The cooperation between the testing hole and testing port allows for rapid alignment and facilitates quick alignment of the remaining holes on the workpiece, ensuring accurate mounting onto the tray and convenient assembly. The multiple sets of testing air channels provide multiple testing stations, further improving operational efficiency.

[0012] The test port is equipped with a one-way valve that flows towards the air inlet; the air inlet of the workpiece to be tested is connected to the external air source through the air supply component, and the gas can be connected or cut off by adjusting the air supply component; in actual use, after all components are installed in place, water is injected into the water injection hole, and then the air supply component is connected. The air tightness is judged by observing whether there are air bubbles in the water injection hole. The overall operation is simple and the accuracy is high. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of an airtightness detection device provided in a specific embodiment of this utility model;

[0014] Figure 2 This is a cross-sectional view of an airtightness testing device provided in a specific embodiment of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the tray and support plate provided in a specific embodiment of this utility model.

[0016] In the picture:

[0017] 100, support plate; 200, air passage for testing; 210, testing hole; 220, water injection hole; 230, machining hole; 300, workpiece to be tested; 310, testing port; 400, one-way valve; 500, air supply assembly; 510, air supply hose; 520, pipe connector; 530, shut-off valve; 600, support plate; 610, perforation; 700, plug. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 3As shown in the figure, a specific embodiment of the present invention discloses an airtightness testing device, including a support plate 100, on which multiple sets of testing air channels 200 are provided. The testing air channels 200 include interconnected testing holes 210 and water injection holes 220. The workpiece 300 to be tested is installed on the support plate 100, and the testing port 310 of the workpiece 300 extends into the testing hole 210. A one-way valve 400 flowing towards the air inlet is installed in the testing port 310. The air inlet of the workpiece 300 to be tested is connected to an external air source through an air supply assembly 500. The air supply assembly is adjusted to realize the conduction or cutoff of gas.

[0020] The aforementioned airtightness testing device enables rapid alignment through the cooperation of the testing hole and testing port, and also facilitates the rapid alignment of other holes on the workpiece to be tested, allowing it to be accurately installed on the tray for convenient assembly and use. The setting of multiple sets of testing air channels can provide multiple testing stations, further improving work efficiency. In actual use, after all components are installed in place, water is injected into the water injection hole, and then the air supply component is connected. The airtightness is judged by observing whether there are air bubbles in the water injection hole. Overall, the operation is simple and the accuracy is high.

[0021] Furthermore, the gas supply assembly 500 includes a gas supply hose 510, a pipe connector 520 installed at one end of the gas supply hose 510, and a shut-off valve 530 installed at the other end of the gas supply hose 510, which is connected to an external gas source; the pipe connector 520 is connected to the air inlet of the workpiece 300 to be tested; the use of a gas supply hose can not only meet the required gas supply requirements, but also facilitate the disassembly and assembly of the pipe connector and the workpiece to be tested, which is convenient for practical use;

[0022] Furthermore, the shut-off valves of multiple gas supply components can converge at the gas supply pipe, which connects to an external gas source. When a workpiece needs to be tested, the corresponding shut-off valve can be opened, eliminating the need for separate disassembly and reassembly with an external gas source, thus facilitating practical application operations.

[0023] Furthermore, a support plate 600 is provided on one side of the support plate 100. The support plate 600 has multiple through holes 610 for installing the shut-off valve 530, so as to fix the shut-off valve and maintain it in a specific position. It also facilitates the convergence and conduction of multiple shut-off valves with the air intake pipe. It can also prevent the air delivery hose from scattering everywhere and avoid the problem of tangling and knotting, which is convenient for actual use.

[0024] Furthermore, the side wall of the support plate 100 away from the support plate 600 is provided with multiple processing holes 230. The processing holes 230 are used to connect the detection hole 210 and the water injection hole 220. A plug 700 is installed at the outer end of the processing hole 230. The processing hole mainly serves as the connection between the detection hole and the water injection hole. Drilling holes in the side wall of the cylinder support plate can meet the required effect and facilitate actual production and processing. The plug can limit the end of the processing hole, limit the direction of airflow, and ensure the accuracy of detection.

[0025] Furthermore, the water injection hole includes a first hole section and a second hole section that are interconnected. The bottom end of the second hole section is connected to the machining hole. The diameter of the second hole section is smaller than the diameter of the machining hole, while the diameter of the first hole section is larger than the diameter of the machining hole. The first hole section is larger and can hold more water. Combined with the smaller diameter of the second hole section (1-5mm), it can clearly form a bubble / bubbling effect when the airtightness is not up to standard, making it more intuitive and easier to check.

[0026] Furthermore, the top surface of the tray has countersunk holes corresponding to the other protruding flow outlets of the workpiece to be tested. The countersunk holes are used to accommodate the flow outlets, so that the entire workpiece to be tested is tightly installed on the top surface of the tray, so that the detection port can accurately match the detection hole. In addition, each countersunk hole is equipped with a suitable sealing gasket to seal the flow outlet and reduce the influence of other flow channels on the airtightness test of the detection port. It should be noted that the flow outlets of the workpiece to be tested can also be directly sealed with sealing parts, but the operation is more complicated than the above method, especially when batch workpiece testing is required. Disassembling and assembling the sealing parts will affect the overall efficiency. Therefore, the above method is preferred.

[0027] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. An airtightness testing device, characterized in that: Includes a tray, which is equipped with multiple sets of detection air channels, including interconnected detection holes and water injection holes; The workpiece to be tested is mounted on the tray, and the detection port of the workpiece to be tested extends into the detection hole; a one-way valve flowing towards the air inlet is installed in the detection port. The air inlet of the workpiece under test is connected to an external air source through an air delivery assembly. The air can be opened or closed by adjusting the air delivery assembly.

2. The airtightness testing device according to claim 1, characterized in that: The gas delivery assembly includes a gas delivery hose, a pipe fitting installed at one end of the gas delivery hose, and a shut-off valve installed at the other end of the gas delivery hose, which connects to an external gas source. The pipe connector is connected to the air inlet of the workpiece to be tested.

3. The airtightness testing device according to claim 2, characterized in that: A support plate is provided on one side of the tray, and the support plate has multiple perforations for installing the shut-off valve.

4. The airtightness testing device according to claim 1, characterized in that: The side wall of the pallet away from the support plate has multiple machining holes, which are used for conduction detection holes and water injection holes; A plug is installed at the outer end of the machined hole.

5. The airtightness testing device according to claim 4, characterized in that: The water injection hole includes a first hole section and a second hole section that are interconnected, and the bottom end of the second hole section is connected to the machining hole; The diameter of the second hole section is smaller than the diameter of the machined hole, while the diameter of the first hole section is larger than the diameter of the machined hole.

Images