Novel pressure sensor general calibration test tool

Abstract

The utility model relates to a novel pressure sensor general calibration test tool, and relates to the pressure sensor test technology field, the novel pressure sensor general calibration test tool comprises a pedestal, the pedestal is provided with an air inlet hole, the pedestal is slidably connected with clamping plates at two sides of the air inlet hole, the clamping plates are fixedly provided with probes, the pedestal is also slidably connected with a plug pin, and the plug pin is connected with the pedestal. The contact surfaces of the clamping plates and the plug pins are inclined guide surfaces, a spring is arranged between the base and the clamping plates, and the elastic force of the spring drives the two clamping plates to be close to each other. The positions of the clamping plate and the probe are adaptively adjusted according to the positions of the contacts on the outer wall of the pressure sensor, so that the device can be compatible with different products, and after pressure sensors with different shapes are replaced, the device also has good adaptability; through the bolt and the toggle clamp, the pressure sensor can be quickly clamped and fixed, the pressure sensor is convenient to disassemble and assemble, a plurality of bolts do not need to be screwed, and the test efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of pressure sensor testing technology, and in particular to a novel universal calibration and testing tool for pressure sensors. Background Technology

[0002] Currently, in the field of pressure sensors, calibration tests are required before pressure sensors leave the factory. Fixtures are used for sealing and signal output. Since different pressure sensors have varying sizes, manufacturing tools for each product would be costly and inconvenient for storage and use. Therefore, a universal testing tool for the same series but with different sizes is needed.

[0003] Utility model patent CN213874741U discloses a pressure sensor measurement and testing fixture, including a base. The top of the base has a cross-shaped groove. Control blocks are positioned in four directions above the groove. A slot is formed in the center of each control block. A fixing post is positioned above each control block, and the fixing post is inserted into the slot and slidably connected to the groove through the slot. Baffles are installed on both sides of the groove's outlet, with the distance between the baffles being less than the diameter of the fixing post. This utility model clamps pressure sensors of different sizes by moving the position of the control blocks.

[0004] Regarding the aforementioned technologies, the inventors believe that even after replacing pressure sensors with different shapes, the clamp still requires turning multiple bolts to adjust the clamping position, which is still not convenient enough. Utility Model Content

[0005] This application provides a novel universal calibration and testing tool for pressure sensors, which can quickly clamp and fix the pressure sensor without tightening multiple bolts, thus improving testing efficiency.

[0006] This application provides a novel universal calibration and testing tool for pressure sensors, which adopts the following technical solution:

[0007] A novel universal calibration and testing tool for pressure sensors includes a base with an air inlet. Clamping plates are slidably connected to both sides of the air inlet. Probes are fixed on the clamping plates. Pins are also slidably connected to the base. The contact surfaces of the clamping plates and pins are inclined guide surfaces. A spring is provided between the base and the clamping plates, and the spring force drives the two clamping plates to move closer to each other.

[0008] By employing the above technical solution, a sliding pin is inserted into the base, and the pin contacts the clamping plates via a guide surface, causing the two clamping plates to move away from each other. Then, the detection end of the pressure sensor is inserted into the air inlet. At this point, the pin is released or pulled outwards, and the spring force drives the two clamping plates closer together, pressing the probe against the electrical contacts of the pressure sensor, completing the clamping process. The positions of the clamping plates and probe are adaptively adjusted according to the contact position on the outer wall of the pressure sensor, thus ensuring compatibility with different products. This testing tool allows for quick clamping and fixing of the pressure sensor, and both installation and removal of the pressure sensor are convenient, eliminating the need to tighten multiple bolts and improving testing efficiency.

[0009] Optionally, the base includes a middle plate and a bottom plate fixed by bolts, and the bottom surface of the middle plate is provided with a first groove for sliding the clamping plate and a second groove for sliding the pin.

[0010] By adopting the above technical solution, the detachable middle plate and bottom plate facilitate the opening of each slide and the installation of clamps and pins.

[0011] Optionally, a positioning pin is fixed between the middle plate and the bottom plate. The positioning pin is inserted into the second sliding groove, and a strip groove is provided on the pin to slide and connect with the positioning pin.

[0012] By adopting the above technical solution, the sliding range of the pin is limited by the sliding fit between the positioning pin and the slot, thus preventing the pin from being completely pulled out of the slot and lost.

[0013] Optionally, the side wall of the base is provided with a side groove for inserting a spring, and a stop block is threadedly connected to the groove opening, the stop block abutting against the end of the spring.

[0014] By adopting the above technical solution, the side groove and the stop block facilitate the disassembly and assembly of the spring.

[0015] Optionally, an elbow clamp for pressing the pressure sensor is fixed on the base.

[0016] By adopting the above technical solution, the elbow clamp is a quick clamp that can press and fix the pressure sensor by turning the handle. It has a self-locking function and is easy to use.

[0017] Optionally, an annular groove is formed at the top of the wall of the air inlet, and a sealing ring is placed in the annular groove.

[0018] By adopting the above technical solution, the outer periphery of the detection end of the pressure sensor is sealed with a sealing ring, thereby improving the sealing performance of the detection.

[0019] Optionally, a limiting plate is fixed to the top surface of the base by bolts. The limiting plate has a through hole facing the air inlet, and the limiting plate limits the sealing ring to be located in the annular groove.

[0020] By adopting the above technical solution, the sealing ring is prevented from detaching from the annular groove by the limiting plate, and the sealing ring can be easily replaced after the limiting plate is removed.

[0021] Optionally, the first slide is a T-shaped groove, and the clamping plate includes a slider protruding from the side wall, the slider being slidably connected to the first slide.

[0022] By adopting the above technical solution, the sliding stability of the clamping plate is improved by the cooperation between the slider and the T-shaped groove, and the clamping plate is prevented from moving upward and disengaging from the groove.

[0023] Optionally, the top surface of the base is provided with a clearance groove, which is located between the air inlet and the clamping plate.

[0024] By adopting the above technical solution, the clearance groove is used to allow the protruding part of the pressure sensor to enter, so that the detection end of the pressure sensor can be reliably inserted into the air inlet.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The positions of the clamp and probe are adaptively adjusted according to the contact position on the outer wall of the pressure sensor, so it is compatible with different products and has good adaptability after replacing pressure sensors of different shapes.

[0027] 2. This testing tool can quickly clamp and fix the pressure sensor, and the installation and removal of the pressure sensor are both convenient, without the need to tighten multiple bolts, thus improving testing efficiency;

[0028] 3. This testing tool is easy to assemble and disassemble, has a reasonable structure, and its parts are not easily disassembled or fallen off. Attached Figure Description

[0029] Figure 1 This is a perspective view of a novel universal calibration and testing tool for pressure sensors, as described in the embodiment.

[0030] Figure 2 This is an exploded view of an embodiment;

[0031] Figure 3 This is a partial cross-sectional view of an embodiment.

[0032] Explanation of reference numerals in the attached drawings: 1. Base; 11. Middle plate; 12. Bottom plate; 2. Elbow clamp; 13. Air inlet; 3. Clamping plate; 31. Probe; 14. Clearance groove; 4. Pin; 32. Guide surface; 5. Spring; 15. Slide groove one; 16. Slide groove two; 33. Slider; 17. Positioning pin; 41. Strip groove; 18. Side groove; 19. Stop block; 131. Annular groove; 132. Sealing ring; 6. Limiting plate; 61. Through hole. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] Reference Figure 1 This embodiment discloses a novel universal calibration and testing tool for pressure sensors, including a base 1. The base 1 includes a middle plate 11 and a bottom plate 12 fixed by bolts, with the middle plate 11 placed on the bottom plate 12. An elbow clamp 2 for pressing the pressure sensor is fixed on the base 1. The elbow clamp 2 is specifically located on the middle plate 11. The elbow clamp 2 is a quick clamp; the pressure sensor can be pressed and fixed by turning the handle, and it has a self-locking function.

[0035] Reference Figure 2 The base 1 has an air inlet 13, the upper end of which is located on the top surface of the middle plate 11, and the other end of which is located on the rear side wall of the middle plate 11 for connecting an air inlet pipe. The air inlet 13 is used for the insertion of the detection end of the pressure sensor to apply air pressure to the pressure sensor. Clamping plates 3 are slidably connected to both sides of the air inlet 13 on the base 1. Probes 31 are fixed on the clamping plates 3, and the probes 31 connect the electrical contacts of the pressure sensor to lead out an electrical signal to the testing equipment for testing. A clearance groove 14 is provided on the top surface of the base 1, located between the air inlet 13 and the clamping plates 3. The clearance groove 14 allows the protruding part of the pressure sensor to enter, ensuring that the detection end of the pressure sensor can be reliably inserted into the air inlet 13. The clearance groove 14 has a relatively large size, so that even after replacing with pressure sensors of different shapes, the clearance groove 14 can still accommodate the protruding part of the pressure sensor.

[0036] A pin 4 is slidably connected to the base 1, and the sliding direction of the pin 4 is perpendicular to the sliding direction of the clamping plate 3. The contact surface between the clamping plate 3 and the pin 4 is an inclined guide surface 32. A spring 5 is provided between the base 1 and the clamping plate 3, and the elastic force of the spring 5 drives the two clamping plates 3 to move closer to each other. After the pin 4 is inserted into the base 1, the pin 4 slides in contact with the guide surface 32, driving the two clamping plates 3 to move away from each other. During this process, the spring 5 is compressed, thereby moving the probe 31 away from the pressure sensor. After the pin 4 is pulled away from the base 1, the clamping plate 3 returns to its original position under the elastic force of the spring 5, thereby allowing the probe 31 to approach and contact the pressure sensor.

[0037] Reference Figure 1 and Figure 3The bottom surface of the middle plate 11 has a first sliding groove 15 for the sliding of the clamping plate 3 and a second sliding groove 16 for the sliding of the pin 4. The upper end of the clamping plate 3 protrudes from the top surface of the middle plate 11. The detachable middle plate 11 and bottom plate 12 facilitate the opening of each sliding groove and the installation of the clamping plate 3 and the pin 4. The first sliding groove 15 is a T-shaped groove. The clamping plate 3 includes a slider 33 protruding from the side wall. The slider 33 is slidably connected to the first sliding groove 15. The cooperation between the slider 33 and the T-shaped sliding groove 15 improves the sliding stability of the clamping plate 3 and prevents the clamping plate 3 from moving upward and disengaging from the first sliding groove 15. A positioning pin 17 is fixed between the middle plate 11 and the bottom plate 12. The positioning pin 17 is inserted into the second sliding groove 16. The pin 4 has a strip groove 41 that is slidably connected to the positioning pin 17. The sliding cooperation between the positioning pin 17 and the strip groove 41 limits the sliding range of the pin 4 and prevents the pin 4 from being completely pulled out of the second sliding groove 16 and lost.

[0038] Reference Figure 2 The base 1 has a side groove 18 for inserting a spring 5 on its side wall. A stop 19 is threaded onto the groove of the side groove 18, and the stop 19 abuts against the end of the spring 5. The side groove 18 and the stop 19 facilitate the installation and removal of the spring 5. In this embodiment, the clamping plate 3 is relatively tall, so each clamping plate 3 corresponds to two springs 5. The two springs 5 ​​are vertically distributed, thereby providing a stable thrust to the clamping plate 3. The side wall of the clamping plate 3 has a positioning groove for the end of the spring 5 to enter.

[0039] An annular groove 131 is formed at the top of the wall of the air inlet 13, and a sealing ring 132 is placed in the annular groove 131 to seal the outer periphery of the detection end of the pressure sensor. A limiting plate 6 is fixed to the top surface of the base 1 by bolts. The limiting plate 6 is located between two clamping plates 3. The limiting plate 6 has a through hole 61 facing the air inlet 13. The inner diameter of the through hole 61 is smaller than the inner diameter of the annular groove 131. The limiting plate 6 confines the sealing ring 132 within the annular groove 131. After the detection end of the pressure sensor is inserted into the through hole 61, it is inserted into the air inlet 13. The limiting plate 6 prevents the sealing ring 132 from dislodging from the annular groove 131. After removing the limiting plate 6, it is easy to replace the sealing ring 132.

[0040] The implementation principle of this novel universal calibration test tool for pressure sensors is as follows: When clamping the pressure sensor to be tested, loosen the elbow clamp 2, slide the pin 4 into the base 1 to move the two clamping plates 3 away from each other, then place the pressure sensor on the limiting plate 6, insert the detection end of the pressure sensor into the air inlet 13, and then operate the elbow clamp 2 to press the pressure sensor tightly. The sealing ring 132, combined with the downward pressure of the elbow clamp 2, achieves a sealing effect. At this time, loosen or pull the pin 4 outward, and the elastic force of the spring 5 drives the two clamping plates 3 to move closer to each other, pressing the probe 31 against the electrical contacts of the pressure sensor, completing the clamping. The positions of the clamping plates 3 and the probe 31 are adaptively adjusted according to the contact position on the outer wall of the pressure sensor, thus making it compatible with different products.

[0041] In summary, this testing tool can quickly clamp and fix the pressure sensor, and the installation and removal of the pressure sensor are both convenient, without the need to tighten multiple bolts, which improves testing efficiency. It also has good compatibility when replacing pressure sensors with different shapes.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel universal calibration and testing tool for pressure sensors, characterized in that: Includes a base (1), the base (1) has an air inlet (13), the base (1) is slidably connected to two sides of the air inlet (13) with clamps (3), a probe (31) is fixed on the clamps (3), and a pin (4) is slidably connected to the base (1). The surfaces of the clamps (3) and the pin (4) for contact are inclined guide surfaces (32). A spring (5) is provided between the base (1) and the clamps (3), and the elastic force of the spring (5) drives the two clamps (3) to move closer to each other.

2. The novel universal calibration and testing tool for pressure sensors according to claim 1, characterized in that: The base (1) includes a middle plate (11) and a bottom plate (12) fixed by bolts. The bottom surface of the middle plate (11) is provided with a first groove (15) for sliding the clamping plate (3) and a second groove (16) for sliding the pin (4).

3. The novel universal calibration and testing tool for pressure sensors according to claim 2, characterized in that: A positioning pin (17) is fixed between the middle plate (11) and the bottom plate (12). The positioning pin (17) is inserted into the slide groove (16). A strip groove (41) is provided on the pin (4) to slide and connect with the positioning pin (17).

4. A novel universal calibration and testing tool for pressure sensors according to claim 1, characterized in that: The side wall of the base (1) is provided with a side groove (18) for inserting the spring (5). The groove opening of the side groove (18) is threaded with a stop (19), and the stop (19) abuts against the end of the spring (5).

5. A novel universal calibration and testing tool for pressure sensors according to claim 1, characterized in that: An elbow clamp (2) for pressing the pressure sensor is fixed on the base (1).

6. A novel universal calibration and testing tool for pressure sensors according to claim 1, characterized in that: The top of the air inlet (13) has an annular groove (131) and a sealing ring (132) is placed in the annular groove (131).

7. A novel universal calibration and testing tool for pressure sensors according to claim 6, characterized in that: The top surface of the base (1) is fixed with a limiting plate (6) by bolts. The limiting plate (6) has a through hole (61) facing the air inlet (13). The limiting plate (6) limits the sealing ring (132) to be located in the annular groove (131).

8. A novel universal calibration and testing tool for pressure sensors according to claim 2, characterized in that: The first slide (15) is a T-shaped groove, and the clamp (3) includes a slider (33) protruding from the side wall, and the slider (33) is slidably connected to the first slide (15).

9. A novel universal calibration and testing tool for pressure sensors according to claim 1, characterized in that: The top surface of the base (1) is provided with a clearance groove (14), which is located between the air inlet (13) and the clamping plate (3).

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