Sealing test fixture and sealing test system

Abstract

The utility model provides a leakproofness test fixture and leakproofness test system, the leakproofness test fixture includes: two testboards, each testboard includes: a body having a body surface; the product mounting cavity is formed in the surface of the body; the vent hole is formed in the surface of the body and corresponds to the interior of the product mounting cavity; the plurality of pressing blocks surround the product mounting cavity and are separated from the product mounting cavity by a specified width, and the plurality of pressing blocks are mounted on the surface of the body in a manner that the width between the plurality of pressing blocks and the product mounting cavity is adjustable; the annular groove is formed between the product mounting cavity and the plurality of pressing blocks; the sealing ring is accommodated in the annular groove in a matched manner; the two test benches are assembled in a mode that the sealing rings abut against each other, so that test cavities are formed in the sealing rings. By arranging the plurality of split pressing blocks, the width of the annular groove can be flexibly adjusted, so that the sealing ring can be tightly accommodated in the annular groove, the position stability of the sealing ring in use is improved, and the loosening or falling of the sealing ring is reduced.

Description

Technical Field

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

[0002] A product sealing test fixture usually includes two test benches that can be disassembled and assembled with each other. Each test bench is provided with a product mounting cavity and a sealing ring mounting groove surrounding the product mounting cavity. The product mounting cavities of the two test benches are docked to form a test cavity for accommodating the product to be tested. A sealing ring is installed in the sealing ring mounting groove. The sealing rings of the two test benches are docked to form a test cavity for accommodating the product to be tested.

[0003] When conducting product sealing tests, the sealing ring may become loose or fall off as the test bench moves up and down, resulting in poor product testing and damage to the sealing gasket, affecting output. Utility Model Content

[0004] In response to the above problems, the present invention provides a sealing test fixture and a sealing test system, which can tighten the sealing ring by setting a pressure block with adjustable distance, thereby improving the position stability of the sealing ring in the cavity.

[0005] The utility model provides a sealing test fixture, comprising: a test bench assembly, comprising two test benches, each test bench comprising: a body having a body surface; a product installation cavity, provided on the body surface; a vent, provided on the body surface and corresponding to the interior of the product installation cavity; a plurality of pressure blocks, surrounding the product installation cavity and spaced apart from the product installation cavity by a specified width, the plurality of pressure blocks being mounted on the body surface in a manner such that the width between the pressure blocks and the product installation cavity is adjustable; an annular groove, formed between the product installation cavity and the plurality of pressure blocks; and a sealing ring, matched and accommodated in the annular groove; the two test benches are assembled in a manner such that the sealing rings abut against each other, so as to form a test cavity inside the sealing ring.

[0006] This technical solution, by providing multiple separate pressure blocks, allows for flexible adjustment of the distance between the pressure block and the product installation cavity. This allows for flexible adjustment of the width of the annular groove that accommodates the sealing ring, allowing the sealing ring to be tightly accommodated within the groove. This improves the positional stability of the sealing ring during use and reduces the risk of the sealing ring loosening or falling off. Furthermore, the separate pressure block design reduces manufacturing complexity.

[0007] In an optional technical solution of the present invention, a first mounting hole is provided through the pressure block; a second mounting hole corresponding to the position of the first mounting hole is opened on the surface of the main body, and the pressure block is fixed relative to the main body by a screw member passing through the first mounting hole and the second mounting hole.

[0008] According to this technical solution, the fixing method of the pressing block is simple and easy to implement, which is conducive to reducing manufacturing costs.

[0009] In an optional technical solution of the present invention, the first mounting hole and / or the second mounting hole is a waist-shaped hole, and the straight edge of the waist-shaped hole extends along the width direction of the annular groove.

[0010] According to this technical solution, the threaded member can be fixed at different positions in the straight side direction of the waist-shaped hole according to actual needs, so that the sealing ring is always tightly accommodated in the annular groove, thereby improving the stability of the sealing ring in use.

[0011] In an optional technical solution of the present invention, the test bench is in the shape of a cuboid; a plurality of pressing blocks are enclosed on the surface of the body to form a rectangular space.

[0012] According to this technical solution, the shapes of the test bench and the pressing block are both regular, which is conducive to reducing the difficulty of processing the test bench and the pressing block.

[0013] In the optional technical solution of the present invention, the cross-section of the pressing block is an isosceles trapezoid, the first base of the isosceles trapezoid is shorter than the second base of the isosceles trapezoid, the first base is closer to the sealing ring than the second base, and the angle α between the first base and the waist of the isosceles trapezoid has a value range of: 135°≤α<180°.

[0014] According to this technical solution, the shorter first bottom edge is arranged near the sealing ring, and the angle between the first bottom edge and the waist edge is within the above range, so that adjacent pressing blocks are less likely to conflict, thereby improving the convenience and flexibility of width adjustment.

[0015] In an optional technical solution of the present invention, the surface of the pressing block opposite to the sealing ring is a rough surface.

[0016] According to this technical solution, the rough surface can increase the friction between the sealing ring and the pressing block, thereby improving the stability of the sealing ring in the annular groove.

[0017] In an optional technical solution of the present utility model, the rough surface is sawtooth-shaped.

[0018] According to this technical solution, the serrated rough surface has the advantages of being easy to process and having a high friction coefficient, which is beneficial to improving product quality.

[0019] In the optional technical solution of the present invention, a first cable groove with two through ends is provided on one side of the product installation cavity; a second cable groove is provided at a position corresponding to the sealing ring and the first cable groove, and the second cable groove is matched and docked with the first cable groove.

[0020] According to this technical solution, when the product is a sensor, the setting of the first cable trough can facilitate the placement of the sensor cable, and the second cable trough matches and docks with the first cable trough to accommodate the cable, thereby improving the matching of the sensor structure and the sealing test fixture and the sealing performance of the test cavity.

[0021] The utility model further provides a sealing test system, including the above-mentioned sealing test fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the sealing test fixture in the embodiment of the present invention.

[0023] Figure 2 This is a schematic plan view of a test bench without a sealing ring in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the partial structure of a test bench without a sealing ring in an embodiment of the present utility model.

[0025] Figure 4 Schematic diagram of the width of the annular groove when the pressing block is in the first position in an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the width of the annular groove when the pressing block is in the second position in an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the width of the annular groove when the pressing block is in the third position in an embodiment of the present invention.

[0028] Reference numerals:

[0029] Test bench 1; body 11; body surface 111; second mounting hole 112; product mounting cavity 12; first cable groove 121; pressing block 13; first mounting hole 131; rough surface 132; annular groove 14; sealing ring 15; cable groove 151; product 2; DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 1 As shown, the embodiment of the present invention provides a sealing test fixture for testing the sealing of a sensor 2, comprising: a test bench assembly, the test bench assembly comprising two test benches 1. In this embodiment, the structures of the two test benches 1 are basically the same, and the following example shows one of the test benches located at the bottom. Figure 1The test bench 1 below the figure is used as an example. The test bench 1 includes: a body 11, a vent hole, a product installation cavity 12, a pressure block 13, an annular groove 14 (blocked by a sealing ring 15 installed therein), a sealing ring 15 and a test cavity (not shown). The body 11 has a body surface 111 (at Figure 3 As shown in FIG, the product installation cavity 12 is provided on the main body surface 111; the vent hole is provided on the main body surface 111 and corresponds to the interior of the product installation cavity 12, so as to inject the test gas into the product installation cavity 12 or the test cavity; a plurality of pressing blocks 13 surround the product installation cavity 12 and are separated from the product installation cavity 12 by a predetermined width d (at Figures 4 to 6 As shown in the figure, an annular groove 14 is formed between the product installation cavity 12 and the plurality of pressing blocks 13. The plurality of pressing blocks 13 are mounted on the body surface 111 in a manner that the width d between the plurality of pressing blocks 13 and the product installation cavity 12 is adjustable. The sealing ring 15 is matched and accommodated in the annular groove 14. The two test benches 1 are assembled in a manner that the sealing rings 15 are against each other to form a test cavity inside the sealing ring 15.

[0032] When conducting a sealing test on product 2, product 2 is placed in the product installation cavity 12 of one of the test benches 1. The two test benches 1 are assembled so that the two product installation cavities 12 are docked to form a chamber for accommodating product 2. The sealing rings 15 in the two test benches 1 are offset to form a test cavity for accommodating product 2. Test gas is then injected into the test cavity, and the air pressure change is measured to detect the sealing of product 2.

[0033] In this embodiment, by providing multiple separate pressing blocks 13, the distance between the pressing block 13 and the product installation cavity 12 can be flexibly adjusted. This allows for flexible adjustment of the width d of the annular groove 14 for accommodating the sealing ring 15. This allows the sealing ring 15 to be tightly accommodated within the annular groove 14, improving the positional stability of the sealing ring 15 during use and reducing the likelihood of the sealing ring 15 loosening or falling off. Furthermore, the separate design of the pressing block 13 reduces processing difficulty.

[0034] It should be noted that the sealing test fixture provided in this embodiment can be used for sensor sealing testing, and can also be applied to the sealing testing of other types of products. Technicians can adapt the structures of the product mounting cavity 12, sealing ring 15, annular groove 14, etc. to the different types of products 2 or the different peripheral contour structures of the products 2, and this embodiment does not impose any restrictions on this. In addition, other structures that are not mentioned in this embodiment and are part of the sealing test fixture can be implemented with reference to existing technologies and will not be described in detail here.

[0035] Specifically, if Figure 2 Shown is a plan view of a test bench without a sealing ring in an embodiment of the present invention.

[0036] In a preferred embodiment of the present invention, the test bench 1 is rectangular in shape; a plurality of pressure blocks 13 enclose a rectangular space on the main body surface 111. Through the above-described method, the shapes of the test bench 1 and the pressure blocks 13 are both regular, which helps to reduce the difficulty of manufacturing the test bench 1 and the pressure blocks 13. In some embodiments, technicians can adjust the shape of the test bench 1, the shape of the pressure blocks 13, the shape of the product installation cavity 12, and the shape of the annular groove 14 according to the desired shape of the product 2 to be tested, and this embodiment does not impose any restrictions on this.

[0037] Furthermore, the cross-section of the pressing block 13 is an isosceles trapezoid, the first base a of the isosceles trapezoid is shorter than the second base b of the isosceles trapezoid, the first base a is closer to the sealing ring 15 than the second base b, and the angle α between the first base a and the waist c of the isosceles trapezoid is in the range of 135°≤α<180°.

[0038] In the above manner, the shorter first bottom side a is set at a position close to the sealing ring 15, and the angle between the first bottom side a and the waist side is within the above range, so that a gap is generated between adjacent pressing blocks 13. During the installation of the pressing blocks 13 and the adjustment of the width d of the annular groove 14, it is not easy for conflict to occur at the two ends of adjacent pressing blocks 13, thereby improving the convenience and flexibility of adjusting the width d.

[0039] It should be noted that the cross-section of the pressing block 13 is not limited to the isosceles trapezoidal shape illustrated in this embodiment, but may also be a rectangle or other shape, so as to facilitate adjustment of the width d of the annular groove 14 so that the sealing ring 15 is tightly accommodated in the annular groove 14, and this embodiment does not impose any restrictions on this. In addition, the "annular groove 14" described in this embodiment is not strictly annular, and may include a rectangle or other shapes based on the rectangle that are adjusted to match the structural features of the product 2. Technicians can adjust the shape of the annular groove 14 based on the peripheral contour structural features of the product 2, and this embodiment does not impose any restrictions on this.

[0040] Figure 3 This is a partial structural diagram of a test bench without a sealing ring in an embodiment of the present invention. Figure 3 The test bench 1 in FIG. 1 has a pressing block 13 removed, so that the internal structure of the test bench 1 can be clearly shown.

[0041] like Figure 3 As shown, the product installation cavity 12 and the body 11 can be an integrated structure, which is beneficial to improving the assembly efficiency and processing efficiency of the sealing test fixture.

[0042] In a preferred embodiment of the present invention, a first mounting hole 131 is defined within the compression block 13; a second mounting hole 112 is defined on the body surface 111, corresponding to the first mounting hole. The compression block 13 is secured to the second mounting hole 112 via a screw threaded through the first mounting hole 131. In this embodiment, the securing method for the compression block 13 is simple and easy to implement, thereby reducing manufacturing costs.

[0043] Preferably, the second mounting hole 112 is a waist-shaped hole, and the straight edge of the waist-shaped hole 112 extends along the width direction d of the annular groove 14. In this way, the screw member can be fixed at different positions along the straight edge of the waist-shaped hole according to actual needs, so that the sealing ring 15 is always tightly accommodated in the annular groove 14, improving the stability of the sealing ring 15 during use.

[0044] In some embodiments, the first mounting hole 131 can be set as a waist-shaped hole, the second mounting hole 112 can be a round hole, or both the first mounting hole 131 and the second mounting hole 112 can be set as waist-shaped holes, which is not limited in this embodiment.

[0045] like Figures 4 to 6 As shown, the pressure block 13 is moved toward the product installation cavity 12, and the distance between the pressure block 13 and the product installation cavity 12 is shortened, that is, the width d of the annular groove 14 is reduced, so that the sealing ring 15 in the annular groove 14 can be clamped, thereby improving the position stability of the sealing ring 15.

[0046] In a preferred embodiment of the present invention, the surface of the pressing block 13 opposite to the sealing ring 15 is a rough surface 132. The rough surface 132 can increase the friction between the sealing ring 15 and the pressing block 13, and improve the stability of the sealing ring 15 in the annular groove 14. Furthermore, the rough surface 132 is serrated. The serrated rough surface has the advantages of easy processing and high friction coefficient, which is beneficial to improving the quality of the product 2. In this embodiment, the rough surface 132 is locally formed on the surface of the pressing block 13 opposite to the product installation cavity 12. Preferably, the rough surface 132 is formed at a position of the pressing block 13 close to the main body surface 11. In some embodiments, the rough surface 132 can also be formed into other shapes other than serrated, as long as it can increase the friction between the pressing block 13 and the sealing ring 15. This embodiment does not limit this.

[0047] In this embodiment, the sealing test fixture is used as a sealing test fixture for the sensor. The housing of the sensor is provided with a cable, and the sealing ring 15 is provided with a second cable groove 151 ( Figure 1(As shown in the figure), a first cable trough 121 with two through-holes is formed on the side of the product installation cavity 12 corresponding to the cable, allowing the cable to extend to the outside of the product installation cavity 12. The first cable trough 121 and the second cable trough 151 mate and dock to form a channel for the cable to extend along its length. The second cable trough 151 mates and docks with the first cable trough 121 to accommodate the cable, improving the compatibility of the sensor structure with the sealing test fixture and the sealing performance of the test cavity. In addition, for sealing purposes, the sealing ring 15 always protrudes from the side of the product installation cavity 12 and the pressure block 13 that is away from the main body surface 11.

[0048] This embodiment matches and adjusts the structures of the sealing ring 15 and the pressure block 13 according to the structural characteristics of the sensor, so that after the sealing rings 15 of the two test benches 1 are docked, a closed test cavity that accommodates the sensor body and external cables can be formed, thereby improving the sealing of the space in different parts of the product 2 and the accuracy of the sealing test results.

[0049] This embodiment further provides a sealing test system, including an air supply line (not shown), a vent valve (not shown) provided on the air supply line, and the above-mentioned sealing test fixture. The outlet of the air supply line is connected to the vent hole to inject test gas into the test cavity. The vent valve is provided on the air supply line to control the on or off of the air supply line. When performing a sealing test on the product 2, first place the product 2 in the product installation cavity 12, then assemble the sealing rings 15 of the two test benches 1 against each other to form a sealed test cavity, open the vent valve, and inject test gas into the sealed test cavity to perform a sealing test. By adopting the above-mentioned sealing test fixture, the position stability of the sealing ring 15 during use is improved, and the occurrence of loosening or falling off of the sealing ring 15 is reduced.

[0050] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing test fixture, characterized in that: include: A test bench assembly includes two test benches, each of which includes: a body having a body surface; a product mounting cavity provided on the body surface; a vent provided on the body surface and corresponding to the interior of the product mounting cavity; a plurality of pressure blocks surrounding the product mounting cavity and spaced apart from the product mounting cavity by a specified width, the plurality of pressure blocks being mounted on the body surface in a manner adjustable to the width between the product mounting cavities; an annular groove formed between the product mounting cavity and the plurality of pressure blocks; and a sealing ring matched and accommodated in the annular groove; the two test benches are assembled in a manner in which the sealing rings abut against each other to form a test cavity inside the sealing ring.

2. The sealing test fixture according to claim 1, characterized in that: The pressing block is provided with a first mounting hole; A second mounting hole corresponding to the first mounting hole is formed on the surface of the main body, and the pressing block is fixed relative to the main body by passing a screw through the first mounting hole and the second mounting hole.

3. The sealing test fixture according to claim 2, characterized in that: The pressing block and / or the second mounting hole is a waist-shaped hole, and the straight edge of the waist-shaped hole extends along the width direction of the annular groove.

4. The sealing test fixture according to claim 1 or 2, characterized in that: The test bench is in the shape of a cuboid; a plurality of pressing blocks are enclosed on the surface of the body to form a rectangular space.

5. The sealing test fixture according to claim 4, characterized in that: The cross-section of the pressing block is an isosceles trapezoid, the first base of the isosceles trapezoid is shorter than the second base of the isosceles trapezoid, the first base is closer to the sealing ring than the second base, and the angle α between the first base and the waist of the isosceles trapezoid is in the range of: 135°≤α<180°.

6. The sealing test fixture according to claim 5, characterized in that: The surface of the pressing block opposite to the sealing ring is a rough surface.

7. The sealing test fixture according to claim 6, characterized in that: The rough surface is saw-toothed.

8. The sealing test fixture according to claim 6, characterized in that: One side of the product installation cavity is provided with a first cable groove with two ends passing through; A second cable groove is provided at a position of the sealing ring corresponding to the first cable groove, and the second cable groove is matched with and docked with the first cable groove.

9. A sealing test system, characterized in that: A sealing test fixture comprising the sealing test fixture according to any one of claims 1 to 8.

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