Batch test tool for pressure sensors with special appearance structure

Abstract

The utility model relates to a batch test tool of a pressure sensor with a special appearance structure, and relates to the technical field of pressure sensors, the batch test tool comprises a bottom plate, an air channel is arranged in the bottom plate, a plurality of vent holes communicated with the air channel are formed in the top surface of the bottom plate, a ring groove is formed in the hole wall of each vent hole, the ring groove penetrates to the top surface of the bottom plate, and a sealing ring is placed in the ring groove. A cover plate is fixedly installed on the top face of the bottom plate, the cover plate limits the sealing ring in the annular groove, a limiting plate is placed on the top face of the cover plate, and an installation groove allowing the pressure sensor to enter is formed in the limiting plate. According to the invention, batch testing can be carried out on pressure sensors with special appearance structures, and the problem of sealing difficulty in batch testing is solved; a side wall sealing mode is adopted, so that the problem that the sealing ring is ejected out or damaged by air pressure can be avoided, and the problem that the sealing ring is taken out when a product is taken and placed can also be avoided; by arranging the dismounting plate, the taking-out speed of the pressure sensor is increased, the problem that dismounting wastes time and labor is solved, and the testing period is shortened.

Description

Technical Field

[0001] This application relates to the field of pressure sensor technology, and in particular to a batch testing fixture for a pressure sensor with a special shape and structure. Background Technology

[0002] Currently, in the field of pressure sensors, pressure sensors come in various shapes and structures, and data acquisition tests are required before they leave the factory.

[0003] During air pressure testing, the unique structure of the sensor makes end-face sealing difficult in batch testing. If a sealing ring is placed inside the air passage, it is easily pulled out when the product is removed. In batch testing, some sealing rings may be pushed out by air pressure within a short time, or even broken, making replacement time-consuming and laborious, and thus requiring improvement. Utility Model Content

[0004] This application provides a batch testing fixture for pressure sensors with special shapes and structures, which can test pressure sensors with irregular shapes and can prevent the sealing ring from being pulled out when the product is picked up and placed, and prevent the sealing ring from being pushed out or damaged by air pressure.

[0005] This application provides a batch testing fixture for a pressure sensor with a special shape and structure, which adopts the following technical solution:

[0006] A batch testing fixture for a pressure sensor with a special shape includes a base plate with an air passage inside. Multiple vent holes communicating with the air passage are formed on the top surface of the base plate. The walls of the vent holes have annular grooves extending to the top surface of the base plate. A sealing ring is placed within the annular groove. A cover plate is fixedly installed on the top surface of the base plate, confining the sealing ring within the annular groove. A limiting plate is placed on the top surface of the cover plate, and the limiting plate has an installation groove for the pressure sensor to enter.

[0007] By adopting the above technical solution, the air passage is used to connect to a compressed air source. The pressure sensor to be tested is inserted into the mounting slot, and the test end of the pressure sensor is inserted into the vent hole. The sealing ring seals the outer wall of the test end of the pressure sensor. This side-wall sealing method solves the problem of difficulty in sealing the end face of the pressure sensor. The cover plate limits the sealing ring, preventing it from being pushed out or damaged by air pressure, and also preventing the sealing ring from being pulled out during product handling.

[0008] Optionally, the cover plate is provided with fixing bolts, which are threadedly connected to the base plate.

[0009] By adopting the above technical solution, the cover plate and the bottom plate are fixed with fixing bolts, which facilitates disassembly. After the cover plate and the bottom plate are separated, it is easy to put the sealing ring into the annular groove.

[0010] Optionally, the limiting plate has a sliding hole for the fixing bolt to pass through.

[0011] By adopting the above technical solution, the fixing bolt slides in the sliding hole during the process of moving the limiting plate closer to or away from the base plate, which plays a guiding role, avoids misalignment between the limiting plate and the base plate, and improves the stability during disassembly and assembly.

[0012] Optionally, a disassembly plate is also included, which is placed under the base plate. Several top columns are fixed on the disassembly plate, and the base plate has a clearance groove for the top columns to pass through.

[0013] By adopting the above technical solution, when the pressure sensor needs to be removed after testing, the base plate and the limiting plate are placed together on the disassembly plate, and the upper end of the top column passes through the clearance groove and abuts against the bottom surface of the limiting plate. Then, personnel press down on the base plate to move the base plate and the limiting plate away from each other. During this process, the test ends of all pressure sensors separate from the sealing rings, thus allowing the vent holes to be pulled out, which greatly improves the removal speed of the pressure sensor.

[0014] Optionally, the clearance groove is connected to the outer side wall of the base plate.

[0015] By adopting the above technical solution, the top column can be more easily aligned and enter the clearance groove.

[0016] Optionally, the top surface of the limiting plate is provided with a disassembly groove, which is directly opposite the top surface of the base plate.

[0017] By adopting the above technical solution, personnel can insert their fingers into the disassembly groove and then press the bottom plate downwards, causing the bottom plate and the limiting plate to move away from each other. The disassembly groove provides an operating position for pressing the fingers, making it convenient to use.

[0018] Optionally, the mounting groove does not penetrate the limiting plate, and the bottom of the mounting groove is provided with an insertion hole facing the vent.

[0019] By adopting the above technical solution, the pressure sensor is positioned by the bottom wall of the mounting groove, and the insertion hole is used for the test end of the pressure sensor to be inserted.

[0020] Optionally, an inner groove is provided at the corner of the inner wall of the mounting groove.

[0021] By adopting the above technical solution, the inner groove can prevent cracking at the corner of the inner wall of the mounting groove due to stress concentration, and at the same time, it can allow the corner of the pressure sensor to enter, thus avoiding the situation where the pressure sensor cannot be installed in the mounting groove.

[0022] Optionally, the cover plate is made of metal.

[0023] By adopting the above technical solutions, metal cover plates can be made thinner while still maintaining strength.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. It can perform batch testing on pressure sensors with special shapes and structures, solving the problem of sealing difficulties in batch testing;

[0026] 2. The side-wall sealing method can avoid the problem of the sealing ring being pushed out or damaged by air pressure, and also avoid the problem of the sealing ring being taken out when the product is picked up or put down;

[0027] 3. By setting up a disassembly plate, the speed of removing the pressure sensor is improved, solving the problem of time-consuming and labor-intensive disassembly and shortening the testing cycle. Attached Figure Description

[0028] Figure 1 This is a perspective view of a batch testing fixture for a pressure sensor with a special external shape and structure, as described in Embodiment 1.

[0029] Figure 2 This is a localized explosion in Example 1. Figure 1 ;

[0030] Figure 3 This is a localized explosion in Example 1. Figure 2 ;

[0031] Figure 4 This is a partial cross-sectional view of Example 1;

[0032] Figure 5 This is a partial exploded view of Example 2;

[0033] Figure 6 This is a side view after the disassembly plate was used in Embodiment 2.

[0034] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Cover plate; 3. Limiting plate; 31. Mounting groove; 11. Air passage; 12. Vent hole; 32. Insertion hole; 33. Inner groove; 13. Annular groove; 4. Sealing ring; 21. Fixing bolt; 34. Sliding hole; 5. Removal plate; 51. Top column; 14. Clearance groove; 35. Removal groove. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] Example 1:

[0037] Reference Figure 1 and Figure 2 This embodiment discloses a batch testing fixture for a pressure sensor with a special shape and structure, including a base plate 1, a cover plate 2 fixedly installed on the top surface of the base plate 1, a limiting plate 3 placed on the top surface of the cover plate 2, and an installation groove 31 for the pressure sensor to enter on the limiting plate 3.

[0038] Reference Figure 3 and Figure 4 An air passage 11 is provided inside the base plate 1, and multiple vent holes 12 communicating with the air passage 11 are provided on the top surface of the base plate 1. In this embodiment, the vent holes 12 are arranged in a rectangular array, and each vent hole 12 can test one pressure sensor. The air passage 11 is opened in the side wall of the base plate 1 by drilling. All air passages 11 are connected and all vent holes 12 are connected. The outer end of the air passage 11 is connected to a compressed air source through a pipeline. The outer end of the unused air passage 11 is sealed with a plug.

[0039] The number and position of the mounting slots 31 correspond one-to-one with the vent holes 12. The mounting slots 31 do not penetrate the limiting plate 3. The bottom of the mounting slot 31 has an insertion hole 32 facing the vent hole 12, which is used for inserting the test end of the pressure sensor. Since the mounting slots 31 do not penetrate the limiting plate 3, the test ends of all pressure sensors can be pulled out of the vent holes 12 by lifting the limiting plate 3. The inner wall corner of the mounting slot 31 has an inner groove 33. The inner groove 33 prevents cracking at the inner wall corner of the mounting slot 31 due to stress concentration. On the other hand, it allows the corner of the pressure sensor to enter, avoiding the situation where the pressure sensor cannot be installed in the mounting slot 31. The pressure sensor is not easily jammed when being removed or placed. The presence of the inner groove 33 can also serve as a prying force application point.

[0040] It should be noted that although the pressure sensor in this application is a rectangle with dimensions corresponding to the mounting slot 31, in actual implementation, the pressure sensor can be irregular or special in shape, as long as the pressure sensor can be placed into the mounting slot 31. In this embodiment, the position of the insertion hole 32 is offset from the center of the mounting slot 31. For pressure sensors with special shapes, the position of the test end is also offset from the center of the sensor. The test end is aligned with the insertion hole 32 by rotating the pressure sensor.

[0041] The vent 12 has an annular groove 13 extending to the top surface of the base plate 1. A sealing ring 4 is placed inside the annular groove 13. The bottom surface of the cover plate 2 abuts against the top of the sealing ring 4, thus confining the sealing ring 4 within the annular groove 13 and preventing it from coming out. To ensure the strength of the cover plate 2, it is made of metal. A metal cover plate 2 can be made relatively thin while still maintaining strength.

[0042] The cover plate 2 is provided with fixing bolts 21, which are threaded to the base plate 1. Multiple fixing bolts 21 are provided at the corners of the cover plate 2. The cover plate 2 and the base plate 1 are fixed by fixing bolts 21, which also facilitates disassembly. After the cover plate 2 and the base plate 1 are separated, it is easy to put the sealing ring 4 into the annular groove 13.

[0043] The limiting plate 3 has a sliding hole 34 for the fixing bolt 21 to pass through. When the limiting plate 3 is moved closer to or away from the base plate 1, the screw head of the fixing bolt 21 slides in the sliding hole 34, which plays a guiding role, prevents the limiting plate 3 from being misaligned with the base plate 1, and improves the stability during disassembly and assembly.

[0044] The implementation principle of this application embodiment is as follows: Before testing, the air passage 11 is connected to a compressed air source, and the pressure sensor to be tested is installed into the mounting groove 31. The test end of the pressure sensor passes through the insertion hole 32 and is inserted into the vent hole 12. The sealing ring 4 seals the outer wall of the test end of the pressure sensor.

[0045] A flat-bottomed weight is placed on the limiting plate 3 to confine all pressure sensors to the mounting groove 31, preventing excessive air pressure from pushing the pressure sensors out. Even if the top surface of a pressure sensor with a special shape protrudes from the top surface of the limiting plate 3, testing can still be performed through the pressing action of the weight.

[0046] During testing, the sealing ring 4 seals the outer wall of the test end of the pressure sensor, using a side-wall sealing method to solve the problem of difficulty in sealing the end face of the pressure sensor. The cover plate 2 limits the sealing ring 4, which can prevent the sealing ring 4 from being pushed out or broken by air pressure, and also prevent the sealing ring 4 from being taken out when the product is picked up or put down.

[0047] Example 2:

[0048] Reference Figure 5 and Figure 6 A batch testing fixture for a pressure sensor with a special shape and structure. The difference between Embodiment 2 and Embodiment 1 is that it also includes a disassembly plate 5. The disassembly plate 5 is used to place under the base plate 1. Several top posts 51 are fixed on the disassembly plate 5. The top posts 51 are preferably made of metal. The base plate 1 has a clearance groove 14 for the top posts 51 to pass through.

[0049] The clearance groove 14 is connected to the outer side wall of the base plate 1, making it easier for the top column 51 to be aligned and enter the clearance groove 14. The top surface of the limiting plate 3 is provided with a disassembly groove 35, which is directly opposite the top surface of the base plate 1. There is one disassembly groove 35 on each side of the limiting plate 3, and the disassembly groove 35 is connected to the outer side wall of the limiting plate 3 for easy use.

[0050] The implementation principle of Embodiment 2 is as follows: When testing the pressure sensor, the disassembly plate 5 is not used, and the disassembly plate 5 is in a state separated from the base plate 1. When the pressure sensor needs to be removed after the test, the base plate 1 together with the limiting plate 3 is placed on the disassembly plate 5. The upper end of the top post 51 passes through the clearance groove 14 and abuts against the bottom surface of the limiting plate 3. Since the thickness of the top post 51 is greater than the total thickness of the base plate 1 and the cover plate 2, there is a gap between the base plate 1 and the disassembly plate 5.

[0051] Then, the operator inserts their fingers into the disassembly slot 35 and presses the base plate 1 downwards, causing the base plate 1 and the limiting plate 3 to move away from each other. During this process, the test ends of all pressure sensors are separated from the sealing ring 4, thus pulling out the vent hole 12. Finally, the pressure sensor can be removed from the limiting plate 3.

[0052] By setting up the disassembly plate 5, the speed of removing the pressure sensor is greatly improved, solving the problem of time-consuming and laborious disassembly and shortening the testing cycle.

[0053] 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 batch testing fixture for a pressure sensor with a special shape and structure, characterized in that: Includes a base plate (1), in which an air passage (11) is provided, and on the top surface of the base plate (1) are a plurality of vent holes (12) communicating with the air passage (11). The vent hole (12) has an annular groove (13) on its wall, and the annular groove (13) extends to the top surface of the base plate (1). A sealing ring (4) is placed in the annular groove (13). A cover plate (2) is fixedly installed on the top surface of the base plate (1). The cover plate (2) confines the sealing ring (4) in the annular groove (13). A limiting plate (3) is placed on the top surface of the cover plate (2). The limiting plate (3) has an installation groove (31) for a pressure sensor to enter.

2. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 1, characterized in that: The cover plate (2) is provided with fixing bolts (21), which are threadedly connected to the base plate (1).

3. The batch testing fixture for a pressure sensor with a special shape structure according to claim 1, characterized in that: The limiting plate (3) has a sliding hole (34) for the fixing bolt (21) to pass through.

4. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 1, characterized in that: It also includes a disassembly plate (5), which is used to be placed under the base plate (1). Several top posts (51) are fixed on the disassembly plate (5), and the base plate (1) has a clearance groove (14) for the top posts (51) to pass through.

5. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 4, characterized in that: The clearance groove (14) is connected to the outer wall of the base plate (1).

6. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 4, characterized in that: The top surface of the limiting plate (3) is provided with a disassembly groove (35), which is directly opposite the top surface of the base plate (1).

7. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 1, characterized in that: The mounting groove (31) does not penetrate the limiting plate (3), and the bottom of the mounting groove (31) is provided with an insertion hole (32) facing the vent hole (12).

8. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 1, characterized in that: The inner wall corner of the mounting groove (31) is provided with an inner groove (33).

9. The batch testing fixture for a pressure sensor with a special shape and structure according to claim 1, characterized in that: The cover plate (2) is made of metal.

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