Electromagnetic shielding testing device for sealing element

Abstract

The utility model relates to an electromagnetic shielding testing device for a sealing element. At present, the electromagnetic shielding effectiveness assessment of the sealing element is mostly of a material level, shielding test evaluation is carried out only by adopting materials, the shielding effectiveness of the sealing element cannot be accurately reflected, the requirement of the using working condition of the sealing element cannot be accurately met, and the accuracy of the shielding effectiveness assessment of the sealing element is low. The device comprises a base mechanism and a compression mechanism, a positioning block and a plurality of movable limiting blocks are arranged between the base mechanism and the compression mechanism, a sealing piece is arranged between the positioning block and the base mechanism, the positioning block is connected with the base mechanism through a fixing piece, the compression mechanism, the movable limiting blocks and the positioning block are connected through a compression assembly, and the compression assembly is connected with the movable limiting blocks through a sealing piece. And the compression mechanism is fixed on the shielding chamber test window through the assembly component. According to the utility model, the accuracy of sealing element shielding effectiveness assessment can be improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing component testing technology, specifically to an electromagnetic shielding testing device for sealing components. Background Technology

[0002] Electromagnetic shielding rubber material is a new type of material with functions such as electromagnetic wave shielding and signal interference prevention. Seals made from electromagnetic shielding rubber material are widely used in aerospace, electronic equipment communications, military equipment, and medical equipment. The operating environments for electromagnetic shielding materials are typically harsh, requiring the material to possess excellent mechanical properties, durability, and electromagnetic shielding performance. Among these, electromagnetic shielding performance directly affects the final performance of the seal. Electromagnetic shielding is a critical requirement for conductive rubber products, and materials that meet these requirements should be selected for product manufacturing. Shielding effectiveness testing is an important indicator for evaluating the electromagnetic shielding effect of seals.

[0003] Currently, the electromagnetic shielding effectiveness assessment of seals is mostly at the material level. However, the shielding effectiveness of a seal depends not only on the shielding material but also on various factors such as the seal's structure, component layout, and connection method. Using only materials for shielding testing cannot accurately reflect the shielding effectiveness of the seal or meet the requirements of the seal's operating conditions, resulting in low accuracy in assessing the shielding effectiveness of seals.

[0004] Therefore, there is an urgent need for an electromagnetic shielding testing device that can improve the accuracy of shielding effectiveness assessment. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic shielding testing device for sealing components, so as to at least solve the problem of low accuracy in current electromagnetic shielding testing of sealing components.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An electromagnetic shielding testing device for a seal includes a base mechanism and a compression mechanism;

[0008] A positioning block and multiple movable limiting blocks are provided between the base mechanism and the compression mechanism. A sealing element is provided between the positioning block and the base mechanism. The positioning block and the base mechanism are connected by a fixing element. The compression mechanism, the movable limiting block and the positioning block are connected by a clamping assembly. The compression mechanism is fixed to the test window of the shielded room by an assembly assembly.

[0009] Furthermore, the sealing element is a hollow strip-shaped sealing element with a symmetrical double-P shape cross-section.

[0010] Furthermore, the hollow structure inside the seal has an elliptical cross-section.

[0011] Furthermore, the movable limiting block has a cylindrical structure with through holes inside.

[0012] Furthermore, the compression mechanism has a cross-section that is a hollow square, and the outer edge of the compression mechanism is provided with a number of mounting bolt holes, while the inner edge is provided with a number of clamping bolt holes.

[0013] Furthermore, the clamping assembly includes a plurality of clamping bolts and clamping nuts. The clamping bolts pass through the compression mechanism, the movable limiting block and the positioning block in sequence and abut against the sealing element. The clamping nuts are disposed at the end of the clamping bolts away from the sealing element.

[0014] Furthermore, the fastener is a plurality of countersunk screws.

[0015] Furthermore, the assembly assembly includes a plurality of assembly bolts and assembly nuts. The assembly bolts pass through the assembly bolt holes on the compression mechanism and are fixed to the test window of the shielded room. The assembly nuts are disposed at the end of the assembly bolts away from the test window of the shielded room.

[0016] Furthermore, the inner edges of the compression mechanism, the positioning block, and the seal are all aligned.

[0017] Furthermore, the four corners of the base mechanism, the positioning block, and the sealing element are all rounded.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model provides an electromagnetic shielding testing device for a sealing component, which verifies the electromagnetic shielding effectiveness of the sealing component in a laboratory setting and is used to evaluate the shielding effectiveness under usage conditions. It fully considers the structural characteristics of the sealing component and the usage environment, thereby improving the accuracy of the sealing component shielding effectiveness assessment.

[0020] 2. This utility model has a simple structure, is easy to process, has good sealing performance, small testing error, and good applicability. It can be used to evaluate the shielding effectiveness of different cross-sections, directions, frequency bands, and compression amounts. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1This is a front sectional view of the present invention;

[0023] Figure 2 yes Figure 1 Sectional view of AA in the middle;

[0024] Figure 3 yes Figure 1 Cross-sectional view of the middle section (BB);

[0025] The diagram is labeled as follows:

[0026] 1-Seal, 2-Pressure assembly, 3-Base mechanism, 4-Moveable limit block, 5-Compression mechanism, 6-Assembly assembly, 7-Positioning block, 8-Counterhead screw. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example:

[0031] like Figure 1 As shown, this embodiment provides an electromagnetic shielding testing device for a sealing component, which is installed in the test window of a shielded room. By measuring the antenna transmission frequency, the shielding effectiveness at the corresponding frequency point is verified.

[0032] Specifically, the device includes a base mechanism 3 and a compression mechanism 5. A positioning block 7 and multiple movable limit blocks 4 are provided between the base mechanism 3 and the compression mechanism 5. The positioning block 7 is located close to the base mechanism 3, and the movable limit blocks 4 are located close to the compression mechanism 5. A sealing element 1 is provided between the positioning block 7 and the base mechanism 3. The positioning block 7 and the base mechanism 3 are connected by a fixing element. The compression mechanism 5, the movable limit blocks 4 and the positioning block 7 are connected by a pressing assembly 2. The compression mechanism 5 is fixed to the test window of the shielded room by an assembly assembly 6.

[0033] The base mechanism 3 is a cuboid structure, and the positioning block 7 is a pressure plate with a hollow center and a rectangular longitudinal section. The positioning block 7 has multiple bolt mounting holes and multiple screw positioning holes.

[0034] The seal 1 is a hollow strip seal. In this embodiment, the cross-section of the seal 1 is a symmetrical double P shape, and the cross-section of the internal hollow structure is elliptical.

[0035] The fasteners consist of several countersunk screws 8, such as Figure 2 As shown, the countersunk screw 8 passes through the screw positioning hole on the positioning block 7 and is fixed to the base mechanism 3, connecting the positioning block 7 and the base mechanism 3, thereby fixing the seal 1.

[0036] In this embodiment, the movable limiting block 4 has a cylindrical structure with a through hole inside and a uniform height. In other embodiments, movable limiting blocks 4 of different heights can be selected according to the actual working conditions and compression amount of the sealing component 1. Thus, by adjusting the movable limiting block 4, the compression amount of the sealing component 1 can be controlled, thereby simulating the working state of the sealing component 1.

[0037] The compression mechanism 5 has a cross-section that is a hollow square in the middle, and several mounting bolt holes are opened around the outer edge of the compression mechanism 5, while several clamping bolt holes are opened around the inner edge.

[0038] like Figure 3 As shown, the assembly component 6 includes several assembly bolts and assembly nuts. The assembly bolts pass through the assembly bolt holes on the compression mechanism 5, thereby fixing the device to the test window of the shielded room. The assembly nuts are inserted at the end of the assembly bolts away from the test window of the shielded room.

[0039] In this embodiment, the compression mechanism 5 is connected and locked to the test window of the shielded chamber by assembly bolts, and conductive pads and conductive tape are used to seal the edges of the compression mechanism 5 to ensure good electrical contact between the device and the test window.

[0040] The clamping assembly 2 includes several clamping bolts and clamping nuts. The clamping bolts pass through the clamping bolt holes on the compression mechanism 5, the bolt mounting holes on the movable limit block 4 and the positioning block 7 in sequence until they reach the sealing element 1. The clamping nuts are inserted at the end of the clamping bolts away from the sealing element 1. The sealing element 1 is compressed and tightened by tightening the bolts.

[0041] In this embodiment, the countersunk screw 8 and the clamping assembly 2 are spaced apart.

[0042] In this embodiment, the inner edges of the compression mechanism 5, the positioning block 7, and the sealing element 1 are all aligned, and the four corners of the base mechanism 3, the positioning block 7, and the sealing element 1 are all rounded.

[0043] During shielding testing, the test device is installed on the shielding window of the shielded room using assembly component 6. Depending on the actual usage, the antenna can be transmitted from the forward or reverse direction, and tests can be performed on frequencies from 2MHz to 18GHz.

[0044] In this embodiment, the base mechanism 3, the pressing component 2, the compression mechanism 5, the movable limiting block 4, the assembly component 6, the positioning block 7, and the countersunk screw 8 are all made of metal, and the surface of the device is electroplated.

[0045] The usage process in this embodiment is as follows:

[0046] (1) Connect the test equipment

[0047] Place the transmitting antenna outside the shielded room and the receiving antenna inside the shielded room, ensuring that both are aligned with the center of the test window. Connect the transmitting antenna, receiving antenna, and vector network analyzer (or oscilloscope) using coaxial cables and connectors.

[0048] (2) Test system calibration

[0049] Before testing, the test system is calibrated, including the antenna and the measuring equipment, to ensure the accuracy of the test results.

[0050] (3) Test parameter settings

[0051] Set the test parameters of the vector network analyzer (or oscilloscope) according to the test requirements, including the test frequency band, the number of test points, and the output amplitude.

[0052] (4) Measurement without sample

[0053] Begin testing and record the receiving device's indication value when there is no sample as the background value.

[0054] (5) Sample measurement is available

[0055] Use assembly component 6 to fix the device on the test window, and use conductive pads and conductive tape to seal the edge of the compression mechanism 5. After installing the sample, keep the positions of the transmitting and receiving antennas unchanged, and record the indication value of the receiving device when there is a sample at all test frequency points.

[0056] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. An electromagnetic shielding testing device for a sealing component, characterized in that: It includes a base mechanism (3) and a compression mechanism (5); A positioning block (7) and multiple movable limiting blocks (4) are provided between the base mechanism (3) and the compression mechanism (5). A sealing element (1) is provided between the positioning block (7) and the base mechanism (3). The positioning block (7) and the base mechanism (3) are connected by a fixing element. The compression mechanism (5), the movable limiting block (4) and the positioning block (7) are connected by a pressing assembly (2). The compression mechanism (5) is fixed to the test window of the shielded room by an assembly assembly (6).

2. The electromagnetic shielding testing device for a sealing component according to claim 1, characterized in that: The sealing element (1) is a hollow strip-shaped sealing element with a symmetrical double-P cross-section.

3. The electromagnetic shielding testing device for a sealing element according to claim 2, characterized in that: The internal hollow structure of the seal (1) has an elliptical cross-section.

4. The electromagnetic shielding testing device for a sealing component according to claim 1, characterized in that: The movable limiting block (4) has a cylindrical structure with through holes inside.

5. The electromagnetic shielding testing device for a sealing element according to claim 1, characterized in that: The compression mechanism (5) has a square cross-section with a hollow center, and the outer edge of the compression mechanism (5) is provided with a number of assembly bolt holes, and the inner edge is provided with a number of clamping bolt holes.

6. The electromagnetic shielding testing device for a sealing element according to claim 1, characterized in that: The clamping assembly (2) includes several clamping bolts and clamping nuts. The clamping bolts pass through the compression mechanism (5), the movable limiting block (4) and the positioning block (7) in sequence and abut against the sealing element (1). The clamping nuts are inserted at the end of the clamping bolts away from the sealing element (1).

7. The electromagnetic shielding testing device for a sealing element according to claim 1, characterized in that: The fastener includes a number of countersunk screws (8).

8. The electromagnetic shielding testing device for a sealing element according to claim 5, characterized in that: The assembly component (6) includes several assembly bolts and assembly nuts. The assembly bolts pass through the assembly bolt holes on the compression mechanism (5) and are fixed to the test window of the shielded room. The assembly nuts are inserted at the end of the assembly bolts away from the test window of the shielded room.

9. The electromagnetic shielding testing device for a sealing element according to claim 1, characterized in that: The inner edges of the compression mechanism (5), the positioning block (7), and the sealing element (1) are all aligned.

10. The electromagnetic shielding testing device for a sealing element according to claim 1, characterized in that: The four corners of the base mechanism (3), the positioning block (7) and the sealing element (1) are all rounded.

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