A high-temperature and high-pressure test tool for a cap and an assembling and using method thereof

Abstract

The application provides a high-temperature and high-pressure test tool for a cap and an assembling and using method thereof, relates to the technical field of test tools, and comprises a jig base, an air cavity is arranged in the jig base, an outward-threaded convex part is arranged on the upper surface of the jig base, and a containing cavity in communication with the air cavity through a through hole is arranged in the convex part; a sealing ring is arranged at the bottom of the containing cavity and is used for bearing a cap product to be tested; a pressing ring is arranged at the bottom end of the cap product to be tested; a knob pressing head is internally provided with an abutting groove with internal threads, is screwed on the convex part through thread cooperation, and when pressed downward, the product is pressed against the sealing ring through the abutting groove pressing the pressing ring; and a test cavity is formed by the air cavity, the through hole and the space on the bottom side of the product. The application realizes quick pressing and sealing through thread screwing, a transfer ring is arranged between the knob pressing head and the pressing ring, direct friction between the knob pressing head and the product and the pressing ring during rotation of the knob pressing head is avoided, and the application has the advantages of reliable sealing, convenient operation, protection of the surface of the product and strong adaptability.

Description

Technical Field

[0001] This invention relates to the field of testing fixture technology, and in particular to a high-temperature and high-pressure testing fixture for caps and its assembly and usage method. Background Technology

[0002] In industrial production, caps and caps (such as battery caps, sensor encapsulation caps, and sealing caps for various containers) are widely used in multiple fields. These products often need to withstand high-temperature and high-pressure working environments in practical applications, such as in power batteries, hydraulic systems, or chemical containers. Therefore, testing the sealing performance and structural strength of caps and caps under high-temperature and high-pressure environments is a crucial step in ensuring product quality and safety.

[0003] However, existing testing fixtures generally suffer from the following shortcomings: First, their clamping structures are complex, operations are cumbersome, and testing efficiency is low; second, their sealing structures are poorly designed, making them prone to leakage under high temperature and pressure conditions, leading to distorted test results or even damage to the testing equipment; third, the fixtures have poor adaptability to different specifications of cap products, requiring the replacement of the entire fixture when changing products, resulting in high costs. Therefore, there is an urgent need for a cap high-temperature and high-pressure testing fixture with a simple structure, reliable sealing, convenient operation, and strong applicability, along with its assembly and usage method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-temperature and high-pressure testing fixture for caps and its assembly and usage method, aiming to solve the technical problems of unreliable sealing, inconvenient operation, and poor adaptability of existing cap testing fixtures.

[0005] This invention provides the following technical solution: To achieve the above objectives, the present invention provides a high-temperature and high-pressure testing fixture for caps, comprising: The fixture base has a hollow interior forming a sealed air cavity. The upper surface of the fixture base also has a set of protrusions protruding outwards. The protrusions have a receiving cavity set away from the opening of the air cavity. The air cavity is connected to an external air source through an external air pipe and is connected to the receiving cavity through a through-hole. The outer peripheral surface of the protrusions is provided with external threads. A sealing ring is disposed at the bottom of the receiving cavity to support the cap product to be tested. The groove of the cap product to be tested is disposed away from the air cavity. The sealing ring and the bottom wall of the groove of the cap product to be tested are used to achieve isolation and sealing between the receiving cavity and the air cavity. The pressure ring, with its bottom end placed inside the groove of the cap product to be tested, is used to press the cap product to be tested onto the sealing ring. The knob pressure head has an internal abutment groove with its opening facing the protrusion. The bottom of the abutment groove abuts against the top of the pressure ring. The periphery of the abutment groove has an internal thread that engages with the external thread on the protrusion. The knob pressure head is screwed onto the protrusion and pressed against the top of the pressure ring through the threaded engagement. When the knob pressure head is screwed down, the bottom of the abutment groove presses down on the pressure ring, causing the cap to be tested to abut against the sealing ring of the receiving cavity. The test chamber is composed of the air chamber, the through port, and the space between the through port and the bottom side of the cap product to be tested in the receiving chamber. The space is isolated and sealed by the sealing ring, the receiving chamber, and the bottom side wall of the cap product to be tested.

[0006] The beneficial effects of the above technical solution are as follows: by tightening the lower pressure ring with the knob pressure head, the cap product to be tested is tightly pressed onto the sealing ring. Under pressure, the sealing ring undergoes elastic deformation, filling the microscopic gap between the product and the receiving cavity, forming an effective sealing barrier. Simultaneously, the use of a threaded tightening method achieves both compression and sealing, eliminating the need for complex tools or additional fasteners. Operators can simply tighten the knob pressure head to complete the clamping process, significantly shortening test preparation time and improving test efficiency.

[0007] Furthermore, the jig base has at least two sets of protrusions, and each set of protrusions corresponds to an independent air chamber.

[0008] The beneficial effects of the above technical solution are as follows: by setting at least two sets of protrusions on the fixture base and equipping them with independent air chambers, the function of multi-station parallel testing is realized. Operators can load different cap products to be tested at different stations and perform inflation and testing independently, which greatly improves testing efficiency. Since the air paths of each station are independent, mutual interference is avoided, ensuring the accuracy of the test.

[0009] Furthermore, the air inlet of the air chamber is equipped with a shut-off valve or a one-way valve.

[0010] The beneficial effects of the above technical solution are as follows: by setting a shut-off valve or a one-way valve at the air inlet of the air chamber, the air source can be cut off at any time during the test or the backflow of gas can be prevented, which improves the safety and controllability of the test and avoids test failure or equipment damage due to accidental pressure relief or gas backflow.

[0011] Furthermore, a set of adapter rings is also installed at the bottom of the abutment groove, and the adapter rings are used to abut against the top of the pressure ring.

[0012] The beneficial effect of the above technical solution is that by setting an adapter ring, the friction of rotation when turning the knob can be transferred through the adapter ring, avoiding direct action on the pressure ring and preventing the rotation of the pressure ring from affecting the quality of the product.

[0013] Furthermore, the adapter ring, the abutment groove, the assembled receiving cavity, and the sealing ring are coaxially distributed.

[0014] The beneficial effects of the above technical solution are as follows: by ensuring that the adapter ring, the abutment groove, the assembled cavity, and the sealing ring are coaxially distributed, the downward pressure applied by the knob head can be better and more evenly transmitted to the pressure ring and the product along the axis, avoiding uneven sealing or product tilting caused by excessive off-center loading, and further improving the stability of the test and the reliability of the seal.

[0015] Furthermore, the sealing ring is made of high-temperature resistant silicone rubber or fluororubber.

[0016] The beneficial effects of the above technical solution are as follows: the sealing ring made of high-temperature resistant silicone rubber or fluororubber can maintain good elasticity and sealing performance in high-temperature environments, and is not prone to aging, deformation or failure, thus ensuring the long-term stability and sealing effect of the tooling under high-temperature testing conditions.

[0017] Furthermore, both the fixture base and the knob pressure head are made of stainless steel or aluminum alloy and the surface is treated with anti-corrosion coating.

[0018] The beneficial effects of the above technical solution are as follows: by using stainless steel or aluminum alloy materials and applying anti-corrosion treatment, the fixture base and knob pressure head have good corrosion resistance, high temperature resistance and mechanical strength, and can be used for a long time in high temperature, high pressure and humid testing environments without rusting or deformation, thus extending the service life of the tooling.

[0019] A method for assembling and using a high-temperature and high-pressure testing fixture for a cap, based on the aforementioned high-temperature and high-pressure testing fixture for a cap, includes the following steps: S1: Place the sealing ring at the bottom of the receiving cavity of the fixture base; S2: Place the cap product to be tested with the opening facing upwards into the receiving cavity, so that the bottom outer side of the product rests on the sealing ring; S3: Insert the pressure ring, with its bottom end placed in the groove of the cap product to be tested, and the top of the pressure ring facing upwards; S4: Align the knob head with the protrusion and tighten it so that the bottom of the groove abuts against the top of the pressure ring. Tighten the knob head on the protrusion through the threaded connection. Press down the pressure ring to press the product against the receiving cavity. At the same time, the sealing ring is compressed to achieve isolation and sealing. S5: Connect an external air pipe through the air inlet of the air chamber to fill the air chamber with gas at a predetermined pressure. The gas enters the containment chamber through the air chamber and acts on the bottom side of the product. S6: Place the entire device in a constant temperature and humidity chamber and set the test temperature; S7: After heat preservation and pressure maintenance for the predetermined time, remove the cap product, observe and record the changes in its properties.

[0020] The beneficial effects of the above testing method are as follows: This method makes full use of the sealing and pressing structure of the above tooling, and can quickly and reliably complete the performance test of the cap product under high temperature and high pressure environment. By first mechanically pressing and sealing, then inflating and pressurizing, and finally heating and heat preservation, the stability and safety of the seal during the test are ensured, effectively avoiding leakage or product damage caused by improper operation sequence. It is suitable for batch quality inspection scenarios.

[0021] The beneficial effects of this invention are: 1. Tighten the lower pressure ring by turning the knob, and press the cap product to be tested tightly onto the sealing ring. Under pressure, the sealing ring undergoes elastic deformation, filling the micro gap between the product and the receiving cavity, forming an effective sealing barrier. 2. The screw-on tightening method achieves clamping and sealing without the need for complicated tools or additional fasteners. Operators can simply turn the knob and pressure head to complete the clamping, which greatly shortens the test preparation time and improves the test efficiency. 3. The sealing ring is made of high-temperature resistant silicone rubber or fluororubber, which can maintain good elasticity and sealing performance in high-temperature environments; the fixture base and knob pressure head are made of stainless steel or aluminum alloy and are treated with anti-corrosion to ensure the long-term stability and durability of the tooling in high-temperature, high-pressure and humid environments. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an exploded view of the protrusion installation of the present invention; Figure 2 This is a cross-sectional view of the structure of the protrusion mounting part of the present invention; Figure 3 This is a schematic diagram showing the distribution of the additional adapter ring in Example 2; Figure 4 This is a schematic diagram of the structure with two sets of protrusions in Embodiment 3; Markings in the diagram: 1- Fixture base, 11- Protrusion, 111- Receiving cavity, 112- Through port, 113- External thread, 13- Air cavity; 2-The cap product to be tested; 3-Sealing ring; 4-Pressure ring; 5-Knob pressure head, 51-Abutment groove; 6-Adapter ring. Detailed Implementation

[0023] Example 1 Please refer to Figure 1 and Figure 2 This embodiment provides a high-temperature and high-pressure testing fixture for caps.

[0024] The fixture mainly includes a fixture base 1, a sealing ring 3, a pressure ring 4, and a knob pressure head 5; The fixture base 1 has a block-shaped structure with a hollow interior forming a sealed air cavity 13. The upper surface of the fixture base 1 is integrally formed or fixedly connected to an upwardly protruding protrusion 11. The protrusion 11 is roughly cylindrical and has an upwardly opening receiving cavity 111 inside, with the opening of the receiving cavity 111 facing away from the air cavity 13. The air cavity 13 is connected to the bottom of the receiving cavity 111 through a small through-hole 112. External threads 113 are machined on the outer peripheral surface of the protrusion 11. The fixture base 1 is also provided with an air inlet (not shown in the figure) that communicates with the air cavity 13, for connecting to an external air source through an external air pipe. The sealing ring 3 is an annular elastic washer whose outer diameter matches the inner diameter of the receiving cavity 111. It is placed flat at the bottom of the receiving cavity 111 during installation. The cap product 2 to be tested is a cap-shaped structure with one end open and the other end closed. Its groove is placed in the receiving cavity 111 with the groove facing upward (i.e., away from the air cavity 13), so that the bottom side of the outer periphery of the product (i.e. the lower end face of the groove edge) rests on the sealing ring 3. The pressure ring 4 is a hollow short tubular part with an outer diameter slightly smaller than the inner diameter of the groove of the cap product 2 to be tested. During installation, the bottom end of the pressure ring 4 is inserted into the groove of the cap product 2 to be tested and abuts against the bottom wall of the groove, while the top end of the pressure ring 4 extends upward. The knob head 5 is a cap-shaped part with a handle or a screwing structure. It has a downward-opening abutment groove 51 in the center of its interior. The shape of the abutment groove 51 is adapted to the shape of the protrusion 11. The inner wall of its periphery is machined with internal threads, which are matched with the external threads 113 on the protrusion 11. The bottom of the abutment groove 51 is a flat surface for abutting the top of the pressure ring 4. The assembly and usage method of this tooling includes: the operator first places the sealing ring 3 into the bottom of the receiving cavity 111, then places the cap product 2 to be tested with its opening facing upwards into the receiving cavity 111, so that its bottom side presses against the sealing ring 3; then, the bottom end of the pressure ring 4 is inserted into the groove of the cap product 2 to be tested; finally, the abutment groove 51 of the knob pressure head 5 is aligned with the protrusion 11, and the knob pressure head 5 is turned so that its internal thread engages with the external thread 113 of the protrusion 11; as the knob pressure head 5 is gradually tightened, the bottom of the abutment groove 51 moves downward, pressing against the top of the pressure ring 4, and pushing the pressure ring 4 downward to press the cap product 2 to be tested, so that the bottom side of the cap product 2 to be tested is tightly attached to the sealing ring 3; during this process, the sealing ring 3 is compressed and undergoes elastic deformation, filling the tiny gap between the product and the receiving cavity, thereby achieving isolation and sealing between the air cavity 13 and the receiving cavity 111; At this time, the air chamber 13, the through port 112, and the space located below the bottom side of the cap product 2 under the test in the receiving cavity 111 together form a sealed test chamber; high-pressure gas is injected into the air chamber 13 through the external air pipe, and the gas enters the receiving cavity 111 through the through port 112 and acts on the bottom side of the cap product 2 under the test, so that the product can be subjected to pressure resistance test. The high-pressure gas can be a gas with a predetermined pressure, such as high-pressure gas of 0.5-2MPa. During the test, the device can also be placed in the constant temperature and humidity chamber for a preset time, such as setting the test temperature to 80-150℃ and keeping it at the temperature and pressure for 2-24 hours.

[0025] Example 2 Please refer to Figure 3 This embodiment is an optimization based on embodiment 1.

[0026] In this embodiment, an adapter ring 6 is additionally provided at the bottom of the abutment groove 51 of the knob pressure head 5. The adapter ring 6 is a flat annular gasket, which is fixed to the bottom of the abutment groove 51 during installation, or can be detachably placed between the bottom of the groove and the top of the pressure ring 4.

[0027] The main purpose of setting up the adapter ring 6 is as follows: When the operator turns the knob pressure head 5, the knob pressure head 5 will rotate. Without the adapter ring 6, the bottom of the groove 51 of the knob pressure head 5 will directly contact the top of the pressure ring 4 and generate relative rotational friction. This friction will drive the pressure ring 4 to rotate, which will cause friction between the pressure ring 4 and the inner wall of the groove of the cap product 2 under test, which may scratch the product surface or affect the positioning accuracy of the product. By setting up the adapter ring 6, the rotational friction of the knob pressure head 5 acts on the adapter ring 6, and the adapter ring 6 and the pressure ring 4 have static friction or low friction contact, thus effectively preventing the rotation of the knob pressure head 5 from being directly transmitted to the pressure ring 4 and the cap product 2 under test, protecting the product surface from damage, and also ensuring that the pressure ring 4 can be stably pressed down vertically.

[0028] In addition, when testing products of different heights, simply replace the adapter ring 6 with one of different thicknesses to adjust the downward stroke of the knob head 5, ensuring that the pressure ring 4 can press the cap product 2 under test with appropriate pressure, without causing poor sealing due to insufficient stroke or product damage due to excessive stroke.

[0029] The adapter ring 6, the abutment groove 51, the assembled receiving cavity 111, and the sealing ring 3 are coaxially distributed to ensure that the clamping force is transmitted evenly and to avoid sealing failure caused by excessive off-center load.

[0030] Example 3 Please refer to Figure 4 This embodiment demonstrates a multi-station expansion structure for the tooling.

[0031] In actual production testing, in order to improve testing efficiency, it is often necessary to test multiple products simultaneously. To this end, this embodiment provides at least two sets of protrusions 11 on the fixture base 1. Each set of protrusions 11 is equipped with an independent receiving cavity 111, an external thread 113, and an independent sealing ring 3, pressure ring 4, and knob pressure head 5.

[0032] Importantly, each set of protrusions 11 corresponds to an independent set of air chambers 13, and the air chambers 13 are not interconnected. This means that operators can load different cap products 2 to be tested at different workstations and inflate and test them independently. This design not only enables parallel testing at multiple workstations, significantly improving testing efficiency, but also avoids mutual interference and ensures testing accuracy because the air paths at each workstation are independent.

[0033] In addition, to further improve the safety and controllability of the test, a shut-off valve or a check valve can be installed at the air inlet of each air chamber 13 to cut off the air source or prevent gas backflow at any time during the test.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure testing fixture for caps, characterized in that, include: The fixture base (1) has a hollow interior forming a sealed air cavity (13). The upper surface of the fixture base (1) also has a set of protrusions (11) protruding outward. The protrusions (11) have a receiving cavity (111) located away from the opening of the air cavity (13). The air cavity (13) is connected to an external air source through an external air pipe and is connected to the receiving cavity (111) through a through port (112). The outer peripheral surface of the protrusions (11) is provided with external threads (113). A sealing ring (3) is set at the bottom of the receiving cavity (111) to support the cap product (2) to be tested. The groove of the cap product (2) to be tested is set away from the air cavity (13). The sealing ring (3) and the bottom wall of the groove of the cap product (2) to be tested are used to achieve isolation and sealing between the receiving cavity (111) and the air cavity (13). The pressure ring (4) is placed at its bottom end in the groove of the cap product (2) to be tested, and is used to press the cap product (2) to be tested onto the sealing ring (3); The knob pressure head (5) has an abutment groove (51) inside. The groove opening of the abutment groove (51) faces the protrusion (11). The bottom of the groove (51) is used to abut the top of the pressure ring (4). The periphery of the abutment groove (51) is provided with an internal thread. The internal thread cooperates with the external thread (113) on the protrusion (11). The knob pressure head (5) is screwed onto the protrusion (11) and pressed against the top of the pressure ring (4) through the threaded cooperation. When the knob pressure head (5) is screwed down, the bottom of the groove (51) presses down the pressure ring (4) to abut the cap product (2) to be tested against the sealing ring (3) of the receiving cavity (111). The test chamber is formed by the air chamber (13), the through port (112) and the space between the through port (112) and the bottom side of the cap product (2) under test in the receiving cavity (111), and the space is isolated and sealed by the sealing ring (3), the receiving cavity (111) and the bottom side wall of the cap product (2) under test.

2. The high-temperature and high-pressure testing fixture for caps according to claim 1, characterized in that, The fixture base (1) has at least two sets of protrusions (11), and each set of protrusions (11) corresponds to an independent air chamber (13).

3. The high-temperature and high-pressure testing fixture for caps according to claim 2, characterized in that, The air inlet of the air chamber (13) is equipped with a shut-off valve or a one-way valve.

4. The high-temperature and high-pressure testing fixture for caps according to claim 1, characterized in that, The bottom of the abutment groove (51) is also fitted with a set of adapter rings (6), which are used to abut against the top of the pressure ring (4).

5. The high-temperature and high-pressure testing fixture for caps according to claim 4, characterized in that, The adapter ring (6), the abutment groove (51), the assembled receiving cavity (111), and the sealing ring (3) are coaxially distributed.

6. The high-temperature and high-pressure testing fixture for caps according to claim 1, characterized in that, The sealing ring (3) is made of high-temperature resistant silicone rubber or fluororubber.

7. The high-temperature and high-pressure testing fixture for caps according to claim 1, characterized in that, The fixture base (1) and the knob pressure head (5) are both made of stainless steel or aluminum alloy and the surface is treated with anti-corrosion.

8. A method for assembling and using a high-temperature and high-pressure testing fixture for a cap, based on the high-temperature and high-pressure testing fixture for a cap as described in any one of claims 1-7, comprising the following steps: S1: Place the sealing ring (3) at the bottom of the receiving cavity (111) of the fixture base (1); S2: Place the cap product (2) to be tested with its opening facing upward into the receiving cavity (111), so that the bottom outer side of the product is placed on the sealing ring (3); S3: Place the pressure ring (4) in, with its bottom end in the groove of the cap product (2) to be tested, and the top of the pressure ring (4) facing upwards; S4: Align the knob head (5) with the protrusion (11) and tighten it so that the bottom of the groove (51) abuts against the top of the pressure ring (4). Tighten the knob head (5) on the protrusion (11) through the threaded connection. Press down the pressure ring (4) to abut the product against the receiving cavity (111). At the same time, the sealing ring (3) is compressed to achieve isolation and sealing. S5: Connect an external air pipe through the air inlet of the air chamber (13) to fill the air chamber (13) with gas at a predetermined pressure. The gas enters the receiving cavity (111) through the air chamber (13) and acts on the bottom side of the product. S6: Place the entire device in a constant temperature and humidity chamber and set the test temperature; S7: After heat preservation and pressure maintenance for the predetermined time, remove the cap product, observe and record the changes in its properties.

Images