Clamp for testing sealing performance of pressure sensor

Abstract

The utility model discloses a pressure sensor leakproofness test fixture, relates to test fixture technical field, the test fixture includes test main module, seal silica gel plug, pagoda joint, cavel nut, cavel bolt and air pipe, the short side of test main module is equipped with air inlet hole, the pagoda joint is equipped on the air inlet hole, the cavel nut is equipped on the air inlet hole, and the cavel bolt is equipped on the cavel nut. The pagoda connector is connected with an air pipe, and air holes are formed in the two sides of the long edge of the testing main module at equal intervals. Through the cooperation of the test main module, the sealing silica gel plug, the pagoda joint, the claw nut, the claw bolt and the air pipe, the test fixture has the advantages of simple structure and low manufacturing cost, can test 20 pressure sensors at a time, is high in measurement efficiency and good in flexibility, is adaptive to various pressure sensors with air taps in the market, and is suitable for popularization and application. And meanwhile, the test main modules can be flexibly combined so as to be matched with a multi-air-tap pressure sensor and combined for use, so that various measurement requirements are met, and the adaptability of the test fixture is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a test fixture for sealing of a pressure sensor. Background Art

[0002] A pressure sensor is a device or apparatus that can sense external pressure signals and convert them into usable electrical signals according to a certain algorithm. It is a commonly used sensor in daily life and industrial production. Its application areas involve many industries such as water conservancy and hydropower, machine tools, rail transportation, military industry, petrochemicals, mining, power supply, and ships.

[0003] Pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. In actual work, pressure sensors monitor the external pressure through the dedicated air holes on the pressure sensors. If the pressure sensor leaks, it will have a huge impact on the actual external pressure value. Therefore, the pressure sensor has extremely high requirements for the sealing of the product during the production process.

[0004] The existing pressure sensor sealing test usually adopts the following methods: 1. Inserting a single pressure sensor nozzle into the air pipe to pass pressure. This method is inefficient and not firmly fixed to the product, which can easily lead to misjudgment. 2. Using professional pressure sensor sealing test equipment. This method has high procurement costs and is difficult to manufacture. For pressure sensors of different packaging types, the measurement flexibility is low and the applicability is single.

[0005] Based on this, a pressure sensor sealing test fixture is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0006] The utility model aims to provide a sealing test fixture for a pressure sensor to solve the problems in the background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A pressure sensor sealing test fixture comprises a test main module, a sealing silicone plug, a pagoda joint, a clevis nut, a clevis bolt and an air pipe, wherein an air inlet is provided on one side of a short side of the test main module, a pagoda joint is provided on the air inlet, the pagoda joint is connected to the air pipe, and air holes are equidistantly arranged on both sides of a long side of the test main module.

[0009] Preferably, a sealing silicone plug is bonded at the position of the air inlet hole.

[0010] Preferably, there are 20 air holes located on the long sides of the main test module.

[0011] Preferably, the two test main modules are fixedly connected by using a cleat nut and a cleat bolt.

[0012] Preferably, a single test main module is suitable for a single-nozzle pressure sensor, and a combination of two test main modules is suitable for a dual-nozzle pressure sensor.

[0013] Preferably, the air nozzles of the single-nozzle pressure sensor and the double-nozzle pressure sensor are plugged into the sealing silicone plug and have matching sizes.

[0014] Preferably, the air pipe is connected to external pressure gas.

[0015] Preferably, the sealing silicone plug is selected according to the size of the gas nozzle of the test single-nozzle pressure sensor and the double-nozzle pressure sensor.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present application has the advantages of simple structure and low manufacturing cost through the coordination of the test main module, sealing silicone plug, pagoda joint, clevis nut, clevis bolt and air pipe. The test fixture can test 20 pressure sensors at a time, with high measurement efficiency and good flexibility. It is compatible with a variety of pressure sensors with air nozzles on the market. At the same time, the test main modules can be flexibly combined to adapt to multi-air nozzle pressure sensors, which can be used in combination to meet various measurement needs, thereby increasing the adaptability of the test fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the test fixture structure of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the single air nozzle pressure sensor of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the double-nozzle pressure sensor of the utility model.

[0021] Notes on the figure numbers: test main module 1, sealing silicone plug 2, pagoda joint 3, clevis nut 4, clevis bolt 5, air pipe 6, single air nozzle pressure sensor 7, double air nozzle pressure sensor 8. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figure 1-Figure 3A pressure sensor sealing test fixture comprises a test main module 1, a sealing silicone plug 2, a pagoda joint 3, a clevis nut 4, a clevis bolt 5 and an air pipe 6. An air inlet is provided on one side of the short side of the test main module 1, and a pagoda joint 3 is provided on the air inlet. The pagoda joint 3 is connected to the air pipe 6, and air holes are equidistantly arranged on both sides of the long side of the test main module 1.

[0024] See also Figure 1 A sealing silicone plug 2 is bonded at the air inlet position, and the sealing silicone plug 2 wraps and fixes the air nozzle of the product, thereby increasing the sealing and firmness of the connection and reducing the occurrence of test misjudgment.

[0025] See also Figure 1 There are 20 air holes located on the long side of the main test module 1, so that 20 pressure sensors with air nozzles can be tested at one time.

[0026] See also Figure 1 The two test main modules 1 are fixedly connected by using a cleat nut 4 and a cleat bolt 5, and are used in combination to adapt to a pressure sensor with multiple gas nozzles.

[0027] See also Figure 2-Figure 3 A single test main module 1 is suitable for a single air nozzle pressure sensor 7 , and a combination of two test main modules 1 is suitable for a dual air nozzle pressure sensor 8 .

[0028] See also Figure 1-Figure 3 The air nozzles of the single air nozzle pressure sensor 7 and the double air nozzle pressure sensor 8 are plugged into the sealing silicone plug 2 and have matching sizes.

[0029] See also Figure 1 The air pipe 6 is connected to the external pressure gas, and the external pressure gas is introduced to confirm whether the product has leakage according to the pressure indication.

[0030] See also Figure 1-Figure 3 The sealing silicone plug 2 is selected according to the size of the air nozzle of the test single air nozzle pressure sensor 7 and the double air nozzle pressure sensor 8, and can detect various types of air nozzle pressure sensors.

[0031] Working principle: Select the usage mode according to the number of air nozzles of the pressure sensor to be tested. If a single-nozzle pressure sensor 7 is to be tested for sealing, the air nozzle of the single-nozzle pressure sensor 7 is tightly connected to the sealing silicone plug 2, and 20 single-nozzle pressure sensors 7 are inserted into the test fixture one by one. At this time, the test main module 1 forms a closed cavity, and pressurized gas is introduced at the end of the air pipe 6. Confirm whether the product has leaks according to the pressure indication. If a double-nozzle pressure sensor 8 is to be tested for sealing, adjust the relative positions of the two test main modules 1 according to the positions of the two air nozzles on the double-nozzle pressure sensor 8. After the position is determined, use the clevis nut 4 and the clevis bolt 5 to fix and combine the two test main modules 1. After all the double-nozzle pressure sensors 8 are inserted into the test fixture, the air nozzles of the double-nozzle pressure sensor 8 are tightly connected to the sealing silicone plug 2, so that the test main module 1 forms a closed cavity, and pressurized gas is introduced at the end of the air pipe 6. Confirm whether the product has leaks according to the pressure indication.

[0032] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pressure sensor sealing test fixture, characterized in that: The invention comprises a test main module (1), a sealing silicone plug (2), a pagoda joint (3), a clevis nut (4), a clevis bolt (5) and an air pipe (6); an air inlet is arranged on one side of a short side of the test main module (1); a pagoda joint (3) is arranged on the air inlet; the pagoda joint (3) is connected to the air pipe (6); and air holes are arranged equidistantly on both sides of a long side of the test main module (1).

2. A pressure sensor sealing test fixture according to claim 1, characterized in that: A sealing silicone plug (2) is bonded at the position of the air inlet hole.

3. A pressure sensor sealing test fixture according to claim 1, characterized in that There are 20 air holes located on the long side of the test main module (1).

4. A pressure sensor sealing test fixture according to claim 3, characterized in that: The two test main modules (1) are fixedly connected by using a cleat nut (4) and a cleat bolt (5) in combination.

5. A pressure sensor sealing test fixture according to claim 4, characterized in that: A single test main module (1) is suitable for a single-nozzle pressure sensor (7), and a combination of two test main modules (1) is suitable for a dual-nozzle pressure sensor (8).

6. A pressure sensor sealing test fixture according to claim 5, characterized in that: The gas nozzles of the single gas nozzle pressure sensor (7) and the double gas nozzle pressure sensor (8) are plugged into the sealing silicone plug (2) and have matching sizes.

7. A pressure sensor sealing test fixture according to claim 1, characterized in that: The air pipe (6) is connected to external pressure gas.

8. A pressure sensor sealing test fixture according to claim 2, characterized in that: The sealing silicone plug (2) is selected according to the size of the gas nozzles of the single gas nozzle pressure sensor (7) and the double gas nozzle pressure sensor (8) for testing.

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