A signal interference suppression device for a distribution box

Abstract

This utility model discloses a signal interference suppression device for a distribution box, belonging to the field of signal interference suppression. It aims to solve the problem that in the existing technology, when a distribution box needs maintenance, the shielded cabinet must be opened, which damages the integrity of the shielding structure and leads to a significant decrease in shielding performance. During maintenance, external electromagnetic interference can easily penetrate the distribution box, potentially interfering with maintenance operations and damaging sensitive internal components. The device includes a shielded cabinet with a door at its front end and a maintenance mechanism at its outer end. The maintenance mechanism includes adjusting plates connected to the left and right ends and the rear end of the shielded cabinet. A handle is fixedly connected to the lower outer end of the adjusting plate, and a fixing plate is welded to the middle of the lower side of the handle. A threaded rod is connected internally to the fixing plate, and a rotating handle is welded to the end of the threaded rod away from the shielded cabinet.

Description

Technical Field

[0001] This utility model belongs to the field of signal interference suppression, and specifically relates to a signal interference suppression device for a distribution box. Background Technology

[0002] In modern industrial automation, smart grids, and building control systems, distribution boxes serve as the core hub for power distribution and signal transmission. Their internal electrical equipment (such as circuit breakers, frequency converters, and PLC controllers) generates complex electromagnetic interference (EMI) during operation and is also susceptible to strong electromagnetic interference from external high-frequency equipment and high-voltage cables. This interference can lead to control signal distortion, data transmission errors, and even equipment malfunctions, seriously threatening the stability and safety of the system.

[0003] In existing technologies, distribution boxes are typically housed within shielded cabinets made of metal materials such as steel plates and aluminum alloys. Utilizing the "Faraday cage" principle, the conductive material reflects and absorbs electromagnetic radiation, blocking the influence of external interference sources on internal equipment while simultaneously suppressing the leakage of electromagnetic radiation generated by the internal equipment. When the distribution box is located near strong electromagnetic environments such as frequency converters, high-voltage cables, and radio frequency equipment, this shielding measure effectively reduces interference intrusion through weak points such as cabinet gaps and cable entry points, providing a stable operating environment for internal controllers, sensors, and other components.

[0004] However, when the distribution box needs to be repaired, the shielding cabinet must be opened, which will damage the integrity of the shielding structure and cause a significant decrease in shielding performance. During the repair process, external electromagnetic interference can easily penetrate into the distribution box, which may not only interfere with the repair operation, but also damage the internal sensitive components. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a signal interference suppression device for distribution boxes. This device aims to solve the problem that when a distribution box needs maintenance, the shielding cabinet must be opened, which damages the integrity of the shielding structure and leads to a significant decrease in shielding performance. During maintenance, external electromagnetic interference can easily penetrate into the distribution box, potentially interfering with maintenance operations and damaging sensitive internal components.

[0007] (2) Technical solution

[0008] To solve the above-mentioned technical problems, this utility model provides a signal interference suppression device for a distribution box, including a shielded box. The front end of the shielded box is equipped with a door, and the outer end of the shielded box is provided with a maintenance mechanism. The maintenance mechanism includes an adjustment plate connected to the left and right ends and the rear end of the shielded box. A handle is fixedly connected to the lower outer end of the adjustment plate, and a fixing plate is welded to the middle position of the lower side of the handle. A threaded rod is connected inside the fixing plate, and a rotating handle is welded to the end of the threaded rod away from the shielded box. A support unit is provided on the outer side of the shielded box.

[0009] Furthermore, the support unit includes a connector fixedly connected to the outside of the shielding box. A round shaft is fixedly connected to the inner side of the connector. A support rod is connected to the outer end of the round shaft. A cylinder is fixedly connected to the outer side of the other end of the support rod. A spring is fixedly connected to the inner end of the cylinder away from the support rod. A circular plate is fixedly connected to the other end of the spring. A pull rod is fixedly connected to the middle position inside the circular plate.

[0010] Furthermore, the shielding box has access ports at the top and bottom of its left and right ends and rear end. The upper outer end of the adjusting plate is hinged to the upper outer end of the shielding box located at the access port. The outer side of the adjusting plate is slidably connected to the inner side of the access port.

[0011] Furthermore, a fixing groove is provided on the outer side of the shielding box at the lower middle position of the detection port, a threaded hole is provided on the upper part of the inside of the fixing plate, a threaded groove is provided on the inside of the shielding box at the fixing groove, the outer side of the fixing plate is slidably connected to the inner side of the fixing groove, and the outer side of the threaded rod is threadedly connected to the inner side of the threaded hole and the threaded groove.

[0012] Furthermore, a rubber pad is affixed to the inside of the inspection port within the shielding enclosure.

[0013] Furthermore, the support rod has a rotating hole at one end of the connector, the outer side of the circular shaft is rotatably connected to the inner side of the rotating hole, and the front and rear ends of the inner side of the connector are slidably connected to the front and rear sides of the support rod.

[0014] Furthermore, the support rod has a sliding hole inside the end away from the connector, the cylinder has a round hole at the middle position inside the end away from the support rod, the upper end of the adjusting plate has a slot on the side near the connector, the outer circumferential surface of the round plate is slidably connected to the inner side of the cylinder, the outer side of the pull rod is slidably connected to the inner side of the sliding hole and the round hole, and the outer side of the pull rod away from the cylinder is inserted into the inner side of the slot.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model, by setting up a maintenance mechanism, allows for maintenance of the distribution box inside the shielded enclosure. When maintenance is required, the rotating handle at the outer end of the fixed plate below the corresponding position adjustment plate is rotated according to the required maintenance location. This causes the threaded rod to move out of the threaded groove, and then the handle can be pulled to rotate the adjustment plate out of the maintenance port. Therefore, when maintaining the distribution box, it is not necessary to open the entire box door; only the maintenance port at the maintenance location needs to be opened, thus avoiding a significant reduction in the shielding effect of the shielded enclosure on the distribution box.

[0018] This invention, by setting up a support unit, allows the adjustment plate to be lifted from the inspection port. The pull rod is then pulled to the inside of the cylinder, and the support rod is rotated so that the end of the support rod away from the connector is rotated to the slot at the outer end of the adjustment plate. The pull rod is then released, and the spring rebounds, pushing the circular plate and inserting the end of the pull rod away from the cylinder into the slot at the outer end of the adjustment plate. This allows the adjustment plate to be supported and fixed by the upward-sloping support rod, ensuring that the adjustment plate is held in place by the support rod while workers inspect the distribution box inside the shielded enclosure through the inspection port, without interfering with their work. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main front structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the main rear structure of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the maintenance mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the support unit of this utility model.

[0024] The markings in the attached diagram are as follows: 1. Shielding enclosure; 2. Enclosure door; 301. Adjustment plate; 302. Handle; 303. Fixing plate; 304. Threaded rod; 305. Rotary handle; 401. Connector; 402. Round shaft; 403. Support rod; 404. Cylinder; 405. Spring; 406. Round plate; 407. Pull rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This specific embodiment is a signal interference suppression device for a power distribution box, and its structural schematic diagram is shown below. Figures 1 to 3 As shown, the shielding enclosure includes a shielded box 1, with a door 2 installed at the front end of the shielded box 1. A maintenance mechanism is provided at the outer end of the shielded box 1. The maintenance mechanism includes an adjustment plate 301 connected to the left and right ends and the rear end of the shielded box 1. Maintenance openings are provided at the top and bottom of the left and right ends and the rear end of the shielded box 1. The upper outer end of the adjustment plate 301 is hinged to the upper outer end of the shielded box 1 located at the maintenance opening. The outer side of the adjustment plate 301 is slidably connected to the inner side of the maintenance opening. A handle 302 is fixedly connected to the lower outer side of the adjusting plate 301. A fixing plate 303 is welded to the middle position of the lower side of the handle 302. A threaded rod 304 is connected inside the fixing plate 303. A rotating handle 305 is welded to the end of the threaded rod 304 away from the shielding box 1. A fixing groove is opened at the middle position of the lower end of the detection port on the outer side of the shielding box 1. A threaded hole is opened at the upper inside of the fixing plate 303. A threaded groove is opened inside the shielding box 1 at the fixing groove. The outer side of the fixing plate 303 is slidably connected to the inner side of the fixing groove. The outer side of the threaded rod 304 is threadedly connected to the inner side of the threaded hole and the threaded groove. Thus, after the adjusting plate 301 is rotated into the inspection port and the fixing plate 303 is slid into the fixing groove, the threaded rod 304 is threaded into the threaded hole inside the fixing plate 303 and then threaded into the threaded groove at the inner end of the shielding box 1. This fixes the fixing plate 303 into the fixing groove and the adjusting plate 301 into the inspection port, thus closing the inspection port.

[0027] The inner side of the inspection port inside the shielding enclosure 1 is fitted with a rubber pad. After the adjusting plate 301 is fixed into the inspection port, the rubber pad on the outer side of the adjusting plate 301 ensures a seal between the adjusting plate 301 and the inner side of the inspection port, thus preventing external dust from entering the shielding enclosure 1.

[0028] Cooperate Figure 4As shown, a support unit is provided on the outer side of the shielding enclosure 1. The support unit includes a connector 401 fixedly connected to the outer side of the shielding enclosure 1. A round shaft 402 is fixedly connected to the inner side of the connector 401. A support rod 403 is connected to the outer end of the round shaft 402. The support rod 403 has a rotating hole at one end inside the connector 401. The outer side of the round shaft 402 is rotatably connected to the inner side of the rotating hole. The front and rear ends of the inner side of the connector 401 are slidably connected to the front and rear sides of the support rod 403. This allows the support rod 403 to rotate around the round shaft 402 inside the connector 401.

[0029] The support rod 403 has a cylinder 404 fixedly connected to its outer side at the other end. A spring 405 is fixedly connected to the inner side of the cylinder 404 away from the support rod 403. A circular plate 406 is fixedly connected to the other end of the spring 405. A pull rod 407 is fixedly connected to the middle position inside the circular plate 406. A sliding hole is opened inside the end of the support rod 403 away from the connector 401. A circular hole is opened inside the middle position inside the end of the cylinder 404 away from the support rod 403. A slot is opened on the upper end of the adjusting plate 301 near the connector 401. The outer circumferential surface of the circular plate 406 is slidably connected to the inner side of the cylinder 404. The outer side of the pull rod 407 is slidably connected to the inner side of the sliding hole and the circular hole. The outer side of the pull rod 407 away from the cylinder 404 is inserted into the inner side of the slot. After lifting the adjusting plate 301 from the access port, the pull rod 407 is first pulled to the inside of the cylinder 404. Then, the support rod 403 is rotated, and the end of the support rod 403 away from the connector 401 is rotated to the slot at the outer end of the adjusting plate 301. After releasing the pull rod 407, the spring 405 will rebound and push the circular plate 406, pushing the end of the pull rod 407 away from the cylinder 404 into the slot at the outer end of the adjusting plate 301. This allows the adjusting plate 301 to be supported and fixed by the upward-tilting support rod 403. As a result, when the staff inspects the distribution box inside the shielded enclosure 1 through the access port, the adjusting plate 301 can be supported and fixed by the support rod 403, without affecting the staff's inspection work.

[0030] Working principle: When it is necessary to inspect the distribution box inside the shielded enclosure 1, according to the required inspection position of the distribution box, rotate the rotating handle 305 at the outer end of the fixing plate 303 below the adjusting plate 301 inside the corresponding inspection port, so that the threaded rod 304 moves out of the threaded groove. Then pull the handle 302 to turn the adjusting plate 301 out of the inspection port. Next, pull the pull rod 407 at the inspection port to the inside of the cylinder 404. Then rotate the support rod 403, and rotate the end of the support rod 403 away from the connector 401 to the slot at the outer end of the adjusting plate 301. Then release the pull rod 407. At this time, the spring 405 will rebound and push the circular plate 406, pushing the end of the pull rod 407 away from the cylinder 404 into the slot at the outer end of the adjusting plate 301, so that the adjusting plate 301 is supported and fixed by the upwardly tilted support rod 403. Then, the staff can inspect the distribution box inside the shielded enclosure 1 through the inspection port.

[0031] All technical features in this embodiment can be freely combined according to actual needs.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A signal interference suppression device for a distribution box comprising a shielded box body (1), characterized in that, The shielding box (1) is equipped with a door (2) at the front end. The shielding box (1) is equipped with a maintenance mechanism at the outer end. The maintenance mechanism includes an adjustment plate (301) connected to the left and right ends and the rear end of the shielding box (1). A handle (302) is fixedly connected to the lower outer end of the adjustment plate (301). A fixing plate (303) is welded to the middle position of the lower side of the handle (302). A threaded rod (304) is connected inside the fixing plate (303). A rotating handle (305) is welded to the end of the threaded rod (304) away from the shielding box (1). A support unit is provided on the outer side of the shielding box (1).

2. The signal interference suppression device for an electrical distribution box of claim 1, wherein, The support unit includes a connector (401) fixedly connected to the outside of the shielding box (1). A round shaft (402) is fixedly connected to the inside of the connector (401). A support rod (403) is connected to the outer end of the round shaft (402). A cylinder (404) is fixedly connected to the outer side of the other end of the support rod (403). A spring (405) is fixedly connected to the inner end of the cylinder (404) away from the support rod (403). A circular plate (406) is fixedly connected to the other end of the spring (405). A pull rod (407) is fixedly connected to the middle position inside the circular plate (406).

3. The signal interference suppression device for an electrical distribution box of claim 1, wherein, The shielding box (1) has access ports on the top and bottom of its left and right ends and rear end. The upper outer end of the adjusting plate (301) is hinged to the upper outer end of the shielding box (1) at the access port. The outer side of the adjusting plate (301) is slidably connected to the inner side of the access port.

4. The signal interference suppression device for an electrical distribution box of claim 1, wherein, The shielding box (1) has a fixing groove at the middle position of the lower end of the detection port on the outside. The fixing plate (303) has a threaded hole at the top inside. The shielding box (1) has a threaded groove at the fixing groove inside. The outside of the fixing plate (303) is slidably connected to the inside of the fixing groove. The outside of the threaded rod (304) is threadedly connected to the inside of the threaded hole and the threaded groove.

5. The signal interference suppression device for an electrical distribution box of claim 1, wherein, The inner side of the inspection port inside the shielded box (1) is covered with a rubber pad.

6. The signal interference suppression device for an electrical distribution box of claim 2, wherein, The support rod (403) has a rotating hole at one end inside the connector (401). The outer side of the round shaft (402) is rotatably connected to the inner side of the rotating hole. The front and rear ends of the inner side of the connector (401) are slidably connected to the front and rear sides of the support rod (403).

7. The signal interference suppression device for an electrical distribution box of claim 2, wherein, The support rod (403) has a sliding hole at the end away from the connector (401), and the cylinder (404) has a round hole at the middle position of the end away from the support rod (403). The upper end of the adjusting plate (301) has a slot on the side near the connector (401). The outer circumferential surface of the circular plate (406) is slidably connected to the inner side of the cylinder (404). The outer side of the pull rod (407) is slidably connected to the inner side of the sliding hole and the round hole. The outer side of the pull rod (407) away from the cylinder (404) is inserted into the inner side of the slot.

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