A device for evaluating the pressure resistance of a seal

Abstract

The utility model provides a kind of sealing part pressure resistance evaluation test device, including upper cover plate, lower cavity, air inlet hole, upper cover fastening bolt, lower cover fastening bolt and the sealing part to be measured;The sealing part to be measured includes annular hollow sealing body, and sealing body is arranged between upper installation ring and lower installation ring;Upper installation ring is fastened connection with upper cover plate by upper cover fastening bolt, and lower installation ring is fastened connection with lower cavity by lower cover fastening bolt;The central space of the sealing part to be measured and the end face opposite with upper cover plate and lower cavity are enclosed to form pressurization test area, air inlet hole is opened in upper cover plate and is communicated with pressurization test area, and air inlet hole is connected with air pump.The utility model device can complete sealing part pressurization test in space protection structure, give consideration to pressure monitoring, pressure relief safety and deformation observation demand, improve the security and evaluation convenience of test process.

Description

Technical Field

[0001] This utility model belongs to the technical field of sealing component testing devices, specifically relating to a sealing component pressure resistance evaluation testing device. Background Technology

[0002] Due to their elasticity and environmental adaptability, seals are widely used in various equipment components. With the increasing requirements for equipment manufacturing and reliability, seals usually need to undergo more detailed functional tests during the research, development, finalization and consistency evaluation stages. Among these tests, pressure resistance and deformation response under pressure are important evaluation criteria.

[0003] In existing pressure resistance testing methods, one approach involves enclosing the test piece entirely in a closed pressure vessel or simplified fixture and pressurizing it. While this approach facilitates pressurization, the test chamber is often completely sealed, making it difficult to directly observe and record the deformation of the seal's outer wall during pressurization. This is especially problematic when marking points on the seal's outer wall for optical observation, often resulting in insufficient observation channels, obstructed fields of view, or the need to modify the fixture structure. Another approach uses upper and lower pressure plates or flange-like structures to clamp and fix the seal. However, when the clamping structure does not match the mounting ring structure of the seal under test, it can easily lead to uneven loading, localized compression, or insufficient assembly repeatability, thus affecting the comparability of test data from different batches.

[0004] In addition, pressure tests typically require simultaneous acquisition of pressure change information and the establishment of reliable pressure relief safety measures. Some existing fixtures are not standardized in terms of interface layout, sealing cavity connectivity, and pressure relief channel design, which can easily lead to inconvenience in pressure measurement, interference between pipeline layout and observation area, or lack of effective pressure relief paths in case of abnormal pressure rise, thereby increasing test risks.

[0005] For the reasons mentioned above, there is an urgent need for a pressure resistance evaluation test device that matches the installation form of the annular hollow seal, can form a stable pressure test zone, and takes into account the observation requirements of the pressure process, so as to solve the problems of inconvenient test clamping and observation, insufficient repeatability, and inadequate safety assurance of the existing test. Summary of the Invention

[0006] This invention proposes a pressure resistance evaluation test device for sealing components to overcome problems such as insufficient matching between the existing pressure resistance test clamping structure and the sealing component mounting ring, difficulty in visually observing and recording the deformation of the outer wall of the sealing body during pressurization, and inconvenient arrangement of pressure measurement and pressure relief safety interfaces that are prone to interference with the observation channel.

[0007] To achieve the above objectives, the technical solution proposed by this utility model is as follows: A pressure resistance evaluation test device for a seal includes an upper cover plate, a lower cavity, an air inlet, upper cover fastening bolts, lower cover fastening bolts, and a seal to be tested. The seal to be tested includes an annular hollow sealing body, which is disposed between an upper mounting ring and a lower mounting ring. The upper mounting ring is fastened to the upper cover plate by the upper cover fastening bolts, and the lower mounting ring is fastened to the lower cavity by the lower cover fastening bolts. The central space of the seal to be tested, together with the end faces of the upper cover plate and the lower cavity, forms a pressure test area. The air inlet is opened on the upper cover plate and communicates with the pressure test area. An air pump is externally connected to the air inlet.

[0008] Furthermore, a pressure connection port is provided on the upper cover plate, and a pressure gauge is connected to the external pressure connection port. The pressure connection port is connected to the pressurization test area.

[0009] Furthermore, a safety valve interface is provided on the upper cover plate, and a pressure relief safety valve is connected to the external safety valve interface. The safety valve interface is connected to the pressure test area.

[0010] Furthermore, the lower cavity is a box-shaped structure with an opening at the top, and a square opening is provided on the side wall of the lower cavity, the square opening corresponding to the outer wall of the sealing body.

[0011] Furthermore, the upper cover plate is provided with several U-shaped grooves.

[0012] Furthermore, it also includes several limiting bolts, which connect the upper cover plate to the lower cavity.

[0013] Furthermore, the plurality of U-shaped grooves are arranged at intervals along the circumference of the upper cover plate.

[0014] Furthermore, the upper mounting ring is provided with a plurality of first connecting holes arranged at intervals along the circumference, and the lower mounting ring is provided with a plurality of second connecting holes arranged at intervals along the circumference; a plurality of upper cover fastening bolts pass through the first connecting holes and are connected to the upper cover plate, and a plurality of lower cover fastening bolts pass through the second connecting holes and are connected to the lower cavity.

[0015] Furthermore, several of the limiting bolts are arranged at intervals along the circumference of the upper cover plate.

[0016] Furthermore, target points are provided on the outer wall of the sealing body, and the test deformation of the sealing body is observed through the square opening and the U-shaped groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This embodiment of the invention uses an annular hollow structure formed by the upper cover plate and lower cavity to enclose the seal under test, creating a pressure test zone. This allows the pressure resistance test of the seal to be conducted under the relatively stable cavity constraint, facilitating repeatable pressure tests. The upper and lower mounting rings are securely connected to the upper cover plate and lower cavity, respectively, ensuring clear clamping and positioning of the seal under test. This helps reduce the risk of off-center loading and leakage due to assembly deviations and improves the comparability of test results from different batches. The upper cover plate is equipped with an air inlet and can further accommodate pressure connection ports and safety valve interfaces, facilitating the integration of pressurization, pressure monitoring, and pressure relief protection. The configuration enhances the convenience and safety of the test operation. The square opening on the side wall of the lower cavity and the several U-shaped grooves on the upper cover provide a structural basis for the observation channel. Combined with the target points on the outer wall of the sealing body, the deformation of the outer wall of the sealing body can be directly observed and recorded during pressurization, which facilitates deformation assessment and comparative analysis. At the same time, the test is completed within the space protection range formed by the upper cover and the lower cavity. When the seal is pressurized or damaged, and gas is rapidly released or components are splashed, the upper cover and the lower cavity can shield and isolate the test area, which helps to reduce the safety risks to operators and surrounding equipment.

[0018] Of course, implementing the various technical solutions of this utility model does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the sealing element to be tested according to an embodiment of this utility model; Figure 2 yes Figure 1 AA side sectional view; Figure 3 This is a schematic diagram of the overall structure of the test device according to an embodiment of the present invention; Figure 4 This is a top view of the test apparatus according to an embodiment of the present invention; Figure 5 This is a side view of the test apparatus of an embodiment of this utility model.

[0020] In the diagram, 1-air inlet, 2-upper cover plate, 3-upper cover fastening bolt, 4-limit bolt, 5-pressure connection port, 6-safety valve interface, 7-lower cavity, 8-lower cover fastening bolt, 9-square opening, 10-U-shaped groove, 11-seal element to be tested, 12-upper mounting ring, 13-lower mounting ring, 14-seal body. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example: The following combination Figures 1 to 5 An embodiment of this utility model will be further described below. It should be noted that the structural form of the seal 11 to be tested, the specific dimensions and quantity of each component, and the assembly and fastening method in this embodiment are merely exemplary descriptions to facilitate understanding of the technical solution of this utility model, and do not constitute a limitation on the scope of protection of this utility model; without departing from the overall concept of this utility model, the relevant structure can be adapted and adjusted according to different seal specifications and test conditions.

[0025] like Figure 1 and Figure 2As shown, the seal 11 to be tested includes an upper mounting ring 12, a lower mounting ring 13, and a sealing body 14 disposed between the two. The sealing body 14 is a ring-shaped hollow structure, with an annular central space inside. After being clamped into the test device, this central space, together with the opposite end faces of the upper cover plate 2 and the lower cavity 7 of the test device, forms a pressure test area to withstand the test air pressure. The upper mounting ring 12 and the lower mounting ring 13 are used to achieve end face clamping and positioning with the test device, so that the sealing body 14 maintains a stable installation posture during the pressure test, thereby reducing the influence of clamping misalignment on the test results. In this embodiment, in order to facilitate the observation of the outer wall deformation of the sealing body 14 during the pressurization process, target points can be pre-set on the outer wall of the sealing body 14, such as attaching target stickers or spraying marking points; the form, number, and arrangement of the target points can be selected according to the observation method and measurement accuracy requirements, and are not limited.

[0026] like Figures 3 to 5 As shown, the sealing pressure resistance evaluation test device of this embodiment includes an air inlet 1, an upper cover plate 2, an upper cover fastening bolt 3, a limiting bolt 4, a pressure connection port 5, a safety valve interface 6, a lower cavity 7, a lower cover fastening bolt 8, a square opening 9, and a U-shaped groove 10. The lower cavity 7 is a box-shaped structure with an upper opening, used to form a space to accommodate and protect the test area; the upper cover plate 2 is arranged opposite to the lower cavity 7 and covers the upper opening of the lower cavity 7. To facilitate observation of the outer wall of the sealing body 14, a square opening 9 is opened on the side wall of the lower cavity 7, and the square opening 9 corresponds to the outer wall area of ​​the sealing body 14 in the assembled state; several U-shaped grooves 10 are opened on the upper cover plate 2, and the several U-shaped grooves 10 are arranged at intervals along the circumference of the upper cover plate 2 to provide multi-directional observation channels. The square opening 9 and the U-shaped groove 10 are used to observe and record the outer wall of the sealing body 14 and its target points. The shape, number and arrangement of the openings can be adjusted according to the field of view of the observation equipment and the installation space, and are not limited.

[0027] An air inlet 1 is provided on the upper cover plate 2, which is used to connect to an external air pump to supply air to the pressurized test area. The upper cover plate 2 also has a pressure connection port 5 and a safety valve interface 6. The pressure connection port 5 is connected to a pressure gauge to indicate pressure changes in the pressurized test area; the safety valve interface 6 is connected to a pressure relief safety valve to provide a pressure relief channel in case of abnormal pressure increases, thereby improving the safety and controllability of the test process. The specific model, range, and connection method of the pressure gauge and pressure relief safety valve can be selected according to the target test pressure and safety requirements, and are not limited thereto.

[0028] The assembly, testing steps, and working principle of this embodiment are as follows: First, assembly is performed. The seal to be tested 11 is placed between the upper cover plate 2 and the lower cavity 7, with the sealing body 14 positioned between the opposing end faces of the upper cover plate 2 and the lower cavity 7. The upper mounting ring 12 is fitted against the upper cover plate 2, and the lower mounting ring 13 is fitted against the lower cavity 7. Subsequently, the upper mounting ring 12 is fastened to the upper cover plate 2 using the upper cover fastening bolt 3, and the lower mounting ring 13 is fastened to the lower cavity 7 using the lower cover fastening bolt 8, thereby clamping and fixing the seal to be tested 11 between the upper cover plate 2 and the lower cavity 7. Several limiting bolts 4 are used to connect the upper cover plate 2 and the lower cavity 7 and provide assembly limits, ensuring that the relative position between the upper cover plate 2 and the lower cavity 7 remains stable during pressurization. The number, arrangement, and tightening torque of the limiting bolts 4 can be set according to the device size and test pressure requirements, and are not limited.

[0029] A pressure test is then conducted. After assembly, the central space of the seal 11 under test, along with the opposite end faces of the upper cover plate 2 and the lower cavity 7, forms a pressure test area. An external air pump is connected to the air inlet 1, and air is pumped into the pressure test area, gradually increasing the pressure to create a pressure load on the sealing body 14 from the inside out. During the pressure increase and holding process, the pressure value of the pressure test area is read in real time through the pressure gauge connected to the pressure connection port 5 to obtain process data on pressure changes over time. Based on this working principle, the sealing body 14 expands and deforms under internal pressure; by controlling the pressurization process and recording pressure changes, the pressure resistance of the seal can be evaluated.

[0030] During pressurization, if it is necessary to evaluate the deformation of the outer wall of the sealing body 14, the target points on the outer wall of the sealing body 14 can be observed and recorded through the square opening 9 and several U-shaped grooves 10 to obtain the expansion deformation characteristics of the sealing body 14 under different pressure conditions. The observation method can be manual visual inspection, video recording, or acquisition with the help of optical measurement equipment. The specific observation equipment and acquisition parameters can be selected according to the purpose of the experiment and are not limited.

[0031] When abnormal pressure increases or pressure relief is required, a pressure relief channel is provided through the external pressure relief safety valve connected to safety valve interface 6 to reduce the pressure within the pressurized test area and improve the safety of the test process. Furthermore, since the test is conducted within the space protected by the upper cover plate 2 and the lower cavity 7, these two elements can shield and isolate the test area. Even if rapid gas release or component splashing occurs during pressurization or seal failure, it helps to reduce the safety impact on operators and surrounding equipment.

[0032] When abnormal pressure increases or pressure relief is required, safety valve 6 provides a pressure relief channel to reduce the pressure within the pressurized test area, thereby improving the safety of the test process. Furthermore, since the test is conducted within the space protected by the upper cover plate 2 and the lower cavity 7, these elements act as shielding and isolating the test area. Even in the event of rapid gas release or component splashing during pressurization or seal failure, this helps reduce the safety impact on operators and surrounding equipment.

[0033] For those skilled in the art, various improvements and modifications can be made without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A pressure resistance evaluation test apparatus for seals, characterized in that, The test assembly includes an upper cover plate (2), a lower cavity (7), an air inlet (1), an upper cover fastening bolt (3), a lower cover fastening bolt (8), and a seal to be tested (11). The seal to be tested (11) includes an annular hollow sealing body (14), which is positioned between an upper mounting ring (12) and a lower mounting ring (13). The upper mounting ring (12) is fastened to the upper cover plate (2) by the upper cover fastening bolt (3), and the lower mounting ring (13) is fastened to the lower cavity (7) by the lower cover fastening bolt (8). The central space of the seal to be tested (11) and the opposite end faces of the upper cover plate (2) and the lower cavity (7) form a pressure test area. The air inlet (1) is opened on the upper cover plate (2) and communicates with the pressure test area. The air inlet (1) is connected to an external air pump.

2. The sealing pressure resistance evaluation test apparatus according to claim 1, characterized in that, The upper cover plate (2) is provided with a pressure connection port (5), which is connected to a pressure gauge and is connected to the pressure test area.

3. The sealing pressure resistance evaluation test apparatus according to claim 2, characterized in that, The upper cover plate (2) is provided with a safety valve interface (6), which is connected to a pressure relief safety valve and is connected to the pressure test area.

4. The sealing pressure resistance evaluation test apparatus according to claim 1, characterized in that, The lower cavity (7) is a box-shaped structure with an opening at the top. A square opening (9) is provided on the side wall of the lower cavity (7), and the square opening (9) corresponds to the outer wall of the sealing body (14).

5. The sealing pressure resistance evaluation test apparatus according to claim 4, characterized in that, The upper cover plate (2) has several U-shaped grooves (10).

6. The pressure resistance evaluation test apparatus for seals according to claim 1, characterized in that, It also includes several limiting bolts (4), which connect the upper cover plate (2) to the lower cavity (7).

7. The sealing pressure resistance evaluation test apparatus according to claim 5, characterized in that, The plurality of U-shaped grooves (10) are arranged at intervals along the circumference of the upper cover plate (2).

8. The sealing pressure resistance evaluation test apparatus according to claim 1, characterized in that, The upper mounting ring (12) is provided with a plurality of first connecting holes arranged at intervals along the circumference, and the lower mounting ring (13) is provided with a plurality of second connecting holes arranged at intervals along the circumference; a plurality of upper cover fastening bolts (3) pass through the first connecting holes and are connected to the upper cover plate (2), and a plurality of lower cover fastening bolts (8) pass through the second connecting holes and are connected to the lower cavity (7).

9. The sealing pressure resistance evaluation test apparatus according to claim 6, characterized in that, Several of the limiting bolts (4) are arranged at circumferential intervals along the upper cover plate (2).

10. The sealing pressure resistance evaluation test apparatus according to claim 5, characterized in that, Target points are set on the outer wall of the sealing body (14), and the test deformation of the sealing body (14) is observed through the square opening (9) and the U-shaped groove (10).

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