Air pressure sensor installation sealing test mechanism

Abstract

The utility model discloses an air pressure sensor installation sealing test mechanism, and belongs to the technical field of air pressure sensor sealing test.The test mechanism comprises an air tightness detector and a fixing frame installed on the air tightness detector, an air cylinder is installed at the upper end of the fixing frame, the telescopic end of the air cylinder penetrates through the top of the fixing frame, and a detection box is installed at the telescopic end of the air cylinder; an electric rail is arranged on the air tightness detector, a regulation and control panel is arranged on the fixing frame, an assembling mechanism is arranged on the air tightness detector, and the assembling mechanism comprises a detection table slidably mounted on the electric rail and a plurality of assembling cylinders arranged on the detection table at equal intervals; the double-layer air bag is filled with air, after the outer container air bag and the inner container air bag are inflated and expanded, the probe of the air pressure sensor body is blocked and sealed, compared with a traditional threaded installation mode, the installation mode is more convenient, only the double-layer air bag needs to be decompressed during later disassembly and assembly, and the overall detection efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of air pressure sensor sealing test technology, specifically an air pressure sensor installation sealing test mechanism. Background Technology

[0002] Barometric pressure sensors are widely used in industrial automation, environmental monitoring, automotive electronics and other fields. They are mainly used to measure gas pressure and detect changes in air pressure in equipment. In the production process of barometric pressure sensors, ensuring the airtightness of the sensor housing is a very important step. Existing airtightness testers are usually used to test the airtightness of multiple barometric pressure sensors. During the test, the staff needs to seal the probe interface at the bottom of each barometric pressure sensor and install it on the test stand of the airtightness tester to perform the airtightness test.

[0003] However, although existing air tightness testers have multi-channel testing capabilities and can test multiple products simultaneously, in actual operation, each air pressure sensor still needs to be sealed and installed individually. Even if the tester supports multi-channel simultaneous testing, staff still need to spend a lot of time sealing and installing each air pressure sensor on the test bench. This operation method is not only time-consuming, but also greatly reduces testing efficiency.

[0004] Therefore, this application provides a pressure sensor mounting and sealing test mechanism to solve the above problems. Utility Model Content

[0005] This application provides a pressure sensor installation and sealing test mechanism, which aims to solve the problem mentioned in the background art that workers need to spend a lot of time sealing each pressure sensor one by one and installing it on the test bench. This operation method is not only time-consuming, but also greatly reduces the testing efficiency.

[0006] To achieve the above objectives, this application provides the following technical solution: a pressure sensor installation and sealing test mechanism, including an air tightness tester and a fixed frame installed on the air tightness tester, a cylinder is installed at the upper end of the fixed frame, the telescopic end of the cylinder passes through the top of the fixed frame and a test box is installed thereon, an electric rail is provided on the air tightness tester, and a control panel is provided on the fixed frame.

[0007] The airtightness tester is equipped with an assembly mechanism;

[0008] The assembly mechanism includes a testing platform slidably mounted on an electric rail and several assembly cylinders equidistantly arranged on the testing platform. Each assembly cylinder is fitted with a pressure sensor body. Several sets of clamping seats for positioning the pressure sensor body are equidistantly arranged on the testing platform. The assembly cylinder contains a double-layered airbag for sealing the pressure sensor body. An air inlet pipe is installed inside the assembly cylinder, and the double-layered airbag is fitted over the air inlet pipe. A miniature air pump is provided at the lower end of the testing platform to supply air to the double-layered airbags 73. After the outer airbag 731 and the inner airbag 732 are inflated, they will block and seal the probe of the pressure sensor body 8.

[0009] Preferably, the double-layered airbag consists of an outer airbag and an inner airbag, with the inner airbag disposed inside the outer airbag. The air inlet tube is provided with micro-tubes for intersecting with the outer and inner airbags. Each micro-tube has two air outlets. The inner airbag is a high-elasticity silicone airbag responsible for sealing, while the outer airbag is a rigid constraint ring responsible for limiting radial expansion and ensuring uniform pressure.

[0010] Preferably, a miniature air pressure sensor is installed inside the inner bladder to monitor the inflation pressure in real time and dynamically adjust the air pressure through a PID algorithm to avoid overpressure damage to the probe.

[0011] Preferably, an assembly frame is fixedly installed at the lower end of the testing platform, and the miniature air pump is installed at the upper end of the assembly frame.

[0012] Preferably, the testing platform has an internal cavity, in which a gas distribution pipe is installed. Several air guide pipes connected to the air inlet pipe are installed at equal intervals at the upper end of the gas distribution pipe. A second air vent pipe is symmetrically arranged at the lower end of the gas distribution pipe. A first air vent pipe connected to the second air vent pipe is installed at the lower end of the testing platform. The exhaust port of the micro air pump is connected to the lower end of the first air vent pipe. A pressure relief valve is provided at one end of the first air vent pipe.

[0013] Preferably, the clamping seat is symmetrically provided with a limit rod and an assembly plate sleeved with the limit rod inside. An adjusting screw threaded through the clamping seat and rotatably connected to the assembly plate is provided. Springs are symmetrically installed on the assembly plate. A clamping block is slidably connected to the end of the clamping seat away from the adjusting screw. The clamping block is sleeved with the limit rod. The end of the spring away from the assembly plate is connected to the clamping block.

[0014] Preferably, the clamping block is provided with a plurality of anti-slip protrusions at equal intervals.

[0015] This testing mechanism only requires inserting the probe of the pressure sensor body into the assembly cylinder and filling the double-layer air bladder with gas. After both the outer and inner air bladders are inflated, they will block and seal the probe of the pressure sensor body. Compared with the traditional threaded installation method, this installation method is more convenient. Later disassembly and assembly only requires depressurizing the double-layer air bladders, which improves the overall testing efficiency. Attached Figure Description

[0016] Figure 1 A schematic diagram of a sealing test mechanism for a pressure sensor;

[0017] Figure 2 This is a schematic diagram of the testing station.

[0018] Figure 3 This is a structural schematic diagram of the cross-section of the testing platform;

[0019] Figure 4 A structural schematic diagram of the cross-sectional view of the assembly cylinder;

[0020] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0021] Figure 6 This is a schematic diagram of the structure of the clamping seat from top view.

[0022] In the picture:

[0023] 1. Air tightness tester; 2. Fixture; 3. Cylinder; 4. Control panel; 5. Test box; 6. Electric rail; 7. Assembly mechanism; 71. Test table; 711. Air guide tube; 72. Assembly cylinder; 721. Air inlet tube; 73. Double-layer airbag; 731. Outer airbag; 732. Inner airbag; 733. Miniature tube; 734. Miniature air pressure sensor; 74. Clamping seat; 741. Adjusting screw; 742. Assembly plate; 743. Clamping block; 744. Spring; 745. Limiting rod; 75. Assembly frame; 751. Miniature air pump; 752. First air vent; 753. Pressure relief valve; 754. Second air vent; 755. Air distribution tube; 8. Air pressure sensor body. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] This embodiment provides a pressure sensor mounting and sealing test mechanism, such as... Figure 1-6 As shown, the testing mechanism includes an air tightness tester 1 and a fixed frame 2 installed on the air tightness tester 1. A cylinder 3 is installed on the upper end of the fixed frame 2. The telescopic end of the cylinder 3 passes through the top of the fixed frame 2 and a test box 5 is installed thereon. An electric rail 6 is provided on the air tightness tester 1 and a control panel 4 is provided on the fixed frame 2.

[0026] An assembly mechanism 7 is provided on the airtightness tester 1;

[0027] The assembly mechanism 7 includes a testing platform 71 slidably mounted on the electric rail 6 and several assembly cylinders 72 equidistantly arranged on the testing platform 71. Each assembly cylinder 72 is fitted with a pressure sensor body 8. Several sets of clamping seats 74 for positioning the pressure sensor body 8 are equidistantly arranged on the testing platform 71. The assembly cylinder 72 is equipped with a double-layer airbag 73 for sealing the pressure sensor body 8. An air inlet pipe 721 is installed inside the assembly cylinder 72. The double-layer airbag 73 is fitted outside the air inlet pipe 721. A miniature air pump 751 for supplying air to the double-layer airbag 73 is provided at the lower end of the testing platform 71.

[0028] Specifically, three sets of assembly cylinders 72 are equidistantly arranged on the testing table 71. The assembly cylinders 72 are designed with double-layer airbags 73 inside. When testing the pressure sensor body 8, it is only necessary to insert the probe of the pressure sensor body 8 into the assembly cylinder 72 and fill the double-layer airbags 73 with gas. After the outer airbag 731 and the inner airbag 732 are inflated, they will block and seal the probe of the pressure sensor body 8. Compared with the traditional threaded installation method, this installation method is more convenient. Later disassembly and assembly only requires depressurizing the double-layer airbags 73, which improves the overall testing efficiency.

[0029] The double-layered airbag 73 consists of an outer airbag 731 and an inner airbag 732. The inner airbag 732 is located inside the outer airbag 731. The air inlet tube 721 is provided with micro-tubes 733 for intersecting with the outer airbag 731 and the inner airbag 732. Each micro-tube 733 has two air outlets.

[0030] More specifically, the microtube 733 has two air outlets, which supply air to the outer bladder 731 and the inner bladder 732 respectively. The outer bladder 731 is inflated first to provide basic sealing, and the inner bladder 732 is inflated secondarily to enhance local pressure and avoid the risk of single-layer bladder rupture due to overpressure. After the outer bladder 731 and the inner bladder 732 are inflated, they can cover and seal the probe of the pressure sensor body 8.

[0031] The inner airbag 732 has a miniature pressure sensor 734 installed inside.

[0032] Furthermore, the miniature air pressure sensor 734 directly monitors the actual pressure between the inner air bladder 732 and the probe contact surface, and displays and dynamically adjusts the inflation pressure in real time through the control panel 4.

[0033] An assembly frame 75 is fixedly installed at the lower end of the testing table 71. A miniature air pump 751 is installed at the upper end of the assembly frame 75. The testing table 71 has an internal cavity. An air distribution pipe 755 is installed in the cavity. Several air guide pipes 711 connected to the air inlet pipe 721 are installed at equal intervals at the upper end of the air distribution pipe 755. A second air vent pipe 754 is symmetrically arranged at the lower end of the air distribution pipe 755. A first air vent pipe 752 connected to the second air vent pipe 754 is installed at the lower end of the testing table 71. The exhaust port of the miniature air pump 751 is connected to the lower end of the first air vent pipe 752. A pressure relief valve 753 is provided at one end of the first air vent pipe 752.

[0034] Furthermore, the assembly frame 75 is connected to the testing table 71 through a damping pad to reduce the impact of vibration during air pump operation on testing accuracy. The air distribution pipe 755 supplies air to each assembly cylinder 72 through the air guide pipe 711. The pressure relief valve 753 is directly connected to the first air vent pipe 752, which can release all airbag pressure within 0.5 seconds to protect the equipment in an emergency.

[0035] The clamping seat 74 is symmetrically provided with a limit rod 745 and an assembly plate 742 sleeved with the limit rod 745. An adjusting screw 741 that is rotatably connected to the assembly plate 742 is threaded through the clamping seat 74. Springs 744 are symmetrically installed on the assembly plate 742. A clamping block 743 is slidably connected to the end of the clamping seat 74 away from the adjusting screw 741. The clamping block 743 is sleeved with the limit rod 745. The ends of the springs 744 away from the assembly plate 742 are all connected to the clamping block 743. Several anti-slip protrusions are equidistantly installed on the clamping block 743.

[0036] It should be noted that the adjusting screw 741, together with the spring 744, achieves flexible clamping of the clamping block 743, avoiding scratches on the probe surface caused by rigid clamping. Rotating the adjusting screw 741 can adjust the opening and closing range of the clamping block 743 to adapt to different sizes of air pressure sensor bodies 8. The anti-slip protrusions are made of silicone material to increase friction and prevent the air pressure sensor body 8 from shifting due to vibration during testing.

[0037] In use, the probe of the pressure sensor body 8 is inserted into the assembly cylinder 72, and the double-layer airbag 73 is filled with gas. After both the outer airbag 731 and the inner airbag 732 are inflated, they will block and seal the probe of the pressure sensor body 8. Subsequently, the test platform 71 is pushed to the bottom of the test box 5 via the electric rail 6. The cylinder 3 drives the test box 5 to move downwards to seal and cover the test platform 71. By releasing test gas into the test box 5, the internal air pressure of the test box 5 can be detected by external equipment. Compared with the traditional threaded installation method, this installation method is more convenient. Later disassembly and assembly only requires depressurizing the double-layer airbag 73, which improves the overall testing efficiency.

[0038] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A kind of air pressure sensor installation seal test mechanism, including air-tightness detector (1) and fixed frame (2) installed on air-tightness detector (1), the upper end of the fixed frame (2) is equipped with pneumatic cylinder (3), the telescopic end of the pneumatic cylinder (3) is penetrated with the top of the fixed frame (2) and is equipped with detection box (5), air-tightness detector (1) is equipped with electric rail (6), and fixed frame (2) is equipped with control panel (4); characterized in that Air-tightness detector (1) is equipped with assembly mechanism (7); The assembly mechanism (7) includes detection table (71) slidably installed on electric rail (6) and several assembly barrels (72) equidistantly arranged on detection table (71), air pressure sensor body (8) is inserted in each assembly barrel (72), several groups of clamping seats (74) for positioning air pressure sensor body (8) are equidistantly arranged on detection table (71), double-layer air bag (73) for sealing air pressure sensor body (8) is arranged in the inside of assembly barrel (72), gas connection pipe (721) is installed in the inside of assembly barrel (72), double-layer air bag (73) is sleeved on the outside of gas connection pipe (721), and micro air pump (751) for supplying air to double-layer air bag (73) is arranged at the lower end of detection table (71).

2. The barometric sensor mounting seal test mechanism of claim 1, wherein: Double-layer air bag (73) is composed of outer bladder air bag (731) and inner bladder air bag (732), inner bladder air bag (732) is arranged in the inside of outer bladder air bag (731), micro tube (733) for penetrating outer bladder air bag (731) and inner bladder air bag (732) is arranged on gas connection pipe (721), and two air outlets are formed in micro tube (733).

3. The barometric sensor mounting seal test mechanism of claim 2, wherein: Micro air pressure sensor (734) is installed in the inside of inner bladder air bag (732).

4. The barometric sensor mounting seal test mechanism of claim 1, wherein: Assembly frame (75) is fixedly installed at the lower end of detection table (71), and micro air pump (751) is installed at the upper end of assembly frame (75).

5. The barometric sensor mounting seal test mechanism of claim 4, wherein: Air accommodation cavity is formed in the inside of detection table (71), gas distribution pipe (755) is installed in the air accommodation cavity, a plurality of air guide pipes (711) connected with gas connection pipe (721) are equidistantly installed at the upper end of gas distribution pipe (755), second air pipe (754) is symmetrically arranged at the lower end of gas distribution pipe (755), first air pipe (752) connected with second air pipe (754) is installed at the lower end of detection table (71), the exhaust port of micro air pump (751) is connected with the lower end of first air pipe (752), and pressure relief valve (753) is arranged at one end of first air pipe (752).

6. The barometric sensor mounting seal test mechanism of claim 5, wherein: The inside of the clamping seat (74) is symmetrically provided with a limiting rod (745) and a mounting plate (742) sleeved with the limiting rod (745), the clamping seat (74) is screwed with an adjusting screw (741) rotationally connected with the mounting plate (742), the mounting plate (742) is symmetrically provided with a spring (744), and the end, away from the adjusting screw (741), of the clamping seat (74) is slidably connected with a clamping block (743) sleeved with the limiting rod (745), and the end, away from the mounting plate (742), of the spring (744) is connected with the clamping block (743).

7. The barometric sensor mounting seal test mechanism of claim 6, wherein: A plurality of anti-skid convex blocks are equidistantly arranged on the clamping block (743).

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