Low-voltage cabinet with shielding effect

Abstract

The utility model discloses a low-voltage cabinet with a shielding effect, which relates to the technical field of low-voltage power distribution cabinets and comprises a cabinet body, a row of wire inlet holes are arranged at the top of the cabinet body, a cabinet door is hinged on the front side of the cabinet body, a plurality of metal shielding boxes are arranged in the cabinet body, and the low-voltage cabinet further comprises a metal plate connected between the left inner side wall and the right inner side wall of the cabinet body in a sliding mode through sliding grooves and sliding blocks. The front end of the metal shielding box is not provided with a cover, a plurality of clamping through cavities are formed in the front face of the metal plate from top to bottom at equal intervals, and a plurality of baffles are continuously clamped in the clamping through cavities from left to right. When the electric power cabinet is used, the plurality of metal shielding boxes are arranged, so that when electric power equipment is installed in the cabinet body, the electric power equipment which can generate a relatively strong magnetic field or is easily interfered by electromagnetic interference can be installed in the metal shielding boxes, and therefore, shielding protection can be performed on the electric power equipment, and normal operation and work of the electric power cabinet can be ensured; and the reliability of the power cabinet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage distribution cabinets, in particular to a low-voltage cabinet with shielding effect. Background Art

[0002] A low-voltage cabinet is an electric control device that integrates electrical appliances, controllers, protectors, switches and other functions. It is usually located in the power supply and distribution part of the power system. It is used to control, protect and isolate electrical equipment to ensure the normal operation of the power system. It is mainly used in power systems in industrial production, construction, transportation, municipal administration, medical and other fields.

[0003] Various electrical equipment and wires have electromagnetic interference, and multiple electrical equipment and wires are installed in a low-voltage cabinet, so the electromagnetic interference problem is more significant. In severe cases, it will interfere with the normal operation of the electrical equipment and thus affect the normal operation of the power system. Therefore, low-voltage cabinets usually need to shield some of the electrical equipment inside to reduce the electromagnetic interference they generate or are affected by.

[0004] The Chinese utility model patent with patent application number CN201720719181.2 records a shielding channel structure for a low-voltage switch cabinet for mining. Communication lines can be installed inside the main shielding channel, side shielding channel and vertical shielding channel, and the communication lines are not interfered by external interference sources, effectively ensuring the normal operation of the (PLC) communication system. However, the above-mentioned low-voltage cabinet can only shield the communication lines to prevent interference, but cannot shield and protect other electrical equipment in the cabinet. Utility Model Content

[0005] The purpose of the present application is to provide a low-voltage cabinet with a shielding effect, so as to solve the problem in the above-mentioned background technology that only the communication lines can be shielded to prevent interference, but other power equipment in the cabinet cannot be shielded and protected.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a low-voltage cabinet with shielding effect, comprising a cabinet body, a row of wire inlet holes on the top of the cabinet body, a cabinet door hinged on the front side of the cabinet body, and multiple metal shielding boxes arranged in the cabinet body.

[0007] Preferably, it also includes a metal plate that is slidably connected between the left and right inner walls of the cabinet through a slide groove and a slider, the front end of the metal shielding box has no cover, and a plurality of card-connection cavities are equidistantly provided on the front side of the metal plate from top to bottom, and a plurality of baffles are continuously card-connected from left to right in the plurality of card-connection cavities, and the height of the baffle is not less than the height of the front end opening of the metal shielding box, and the wire entry hole is located on the front side of the baffle. The advantage of such a setting is that it is convenient for the staff to connect the electrical equipment in a plurality of metal shielding boxes. After the wiring is completed, the shielding work of the electrical equipment in all the metal shielding boxes can be completed by directly sliding the metal plate into the interior of the cabinet, which effectively simplifies the installation and connection work of the power equipment and improves the practicability of the low-voltage cabinet.

[0008] Preferably, the metal shielding box includes a back plate, and two groups of limit rods are symmetrically fixedly connected to the front side of the back plate. The metal shielding box also includes two symmetrically arranged side plates, and two groups of limit holes are symmetrically opened on the front sides of the two side plates, and the rear ends of the limit holes penetrate the back sides of the side plates. The two side plates are movably connected to the outer peripheral surfaces of the two groups of limit rods through the two groups of limit holes, and two cross plates are symmetrically slidably connected between the two side plates through sliders and sliding grooves. The front side of the back plate is fixedly connected to a plastic mounting plate. The advantage of such a setting is that the staff can pull out the two side plates or the two cross plates according to installation needs, thereby leaving enough space for installing electrical equipment in the metal shielding box, further simplifying the installation of the electrical equipment. At the same time, the plastic mounting plate can facilitate the staff to fix the electrical equipment to the plastic mounting plate by bolts.

[0009] Preferably, it also includes a displacement assembly for driving the metal shielding box to move up and down, the displacement assembly includes a plurality of square rods fixedly connected to the bottom wall of the cabinet body at equal distances from left to right, a plurality of sliding sleeves are slidably connected to the plurality of square rods from top to bottom, the front faces of the plurality of sliding sleeves are fixedly connected to the metal shielding boxes, and the adjacent sides of the metal shielding boxes on the left and right are in contact with each other, and the displacement assembly also includes a fixing unit for fixing the sliding sleeves. The advantage of such a configuration is that the metal shielding boxes can be moved up and down, so that the two metal shielding boxes adjacent to each other downwards are pressed against each other, and then the horizontal plate in the middle can connect the multiple metal shielding boxes arranged vertically together, so as to facilitate shielding of electrical equipment with a larger height, and the four metal shielding boxes adjacent to each other up, down, left and right can also be moved to one piece, and then the horizontal plate and side plate in the middle can be pulled out, so that the four metal shielding boxes in the shape of a triangle can be connected together, so as to accommodate electrical equipment with a larger width, which can effectively improve the practicality of the power cabinet.

[0010] Preferably, the fixing unit includes two groups of push rods movably plugged into the front side of the sliding sleeve, the rear ends of the two groups of push rods pass through the front side of the sliding sleeve and contact the front side of the square rod, a fixing plate is fixedly connected between the front ends of the two groups of push rods, two groups of elastic members are symmetrically fixedly connected between the back side of the fixing plate and the front side of the sliding sleeve, and the back plate is fixedly connected to the front side of the fixing plate. The advantage of such a setting is that the staff only needs to pull the back plate outward to overcome the elastic force of the elastic members to separate the rear ends of the push rods from the front side of the square rod, so that the sliding sleeve and the metal shielding box thereon can move up and down smoothly along the square rod, and when it moves to the target position, the back plate is directly released, and the push rods can be pressed tightly against the front side of the square rod again under the elastic force of the elastic members to complete the fixed limit of the metal shielding box, which effectively simplifies the contact limit and fixed limit operations of the metal shielding box and greatly improves the practicality of the power cabinet.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] 1. In the utility model, by setting up multiple metal shielding boxes, when installing power equipment in the cabinet, power equipment that will generate a strong magnetic field or is easily affected by electromagnetic interference can be installed inside the metal shielding box. In this way, these power equipment can be shielded and protected, ensuring that the power cabinet can operate normally, thereby improving the reliability of the power cabinet.

[0013] 2. In the utility model, by setting up a displacement component and a detachable and spliced ​​metal shielding box, a plurality of adjacent metal shielding boxes can be connected together to form a shielding space with a larger volume, so that larger electrical equipment can be shielded and protected, further improving the practicality of the low-voltage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a structural schematic diagram of a low-voltage cabinet with a shielding effect in an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of a first partial structure of a low-voltage cabinet with a shielding effect in an embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of a second partial structure of a low-voltage cabinet with a shielding effect in an embodiment of the present application;

[0018] Figure 4 This is a schematic diagram of a third partial structure of a low-voltage cabinet with a shielding effect in an embodiment of the present application;

[0019] Figure 5 It is a left sectional view of the displacement assembly in the embodiment of the present application;

[0020] Figure 6 In the embodiment of this application Figure 3 The enlarged schematic diagram of point A in the middle;

[0021] Figure 7 In the embodiment of this application Figure 4 A magnified schematic diagram of point B in the middle.

[0022] In the figure: 1. cabinet body; 2. cable entry hole; 3. cabinet door; 4. metal shielding box; 41. back plate; 42. limit rod; 43. side plate; 44. limit hole; 45. cross plate; 46. plastic mounting plate; 5. metal plate; 51. baffle; 6. displacement assembly; 61. square rod; 62. sliding sleeve; 63. fixing unit; 631. top rod; 632. fixing plate; 633. elastic member. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] refer to Figure 1-7 A low-voltage cabinet with shielding effect shown in the figure comprises a cabinet body 1, a row of wire inlet holes 2 are provided on the top of the cabinet body 1, a cabinet door 3 is hinged on the front side of the cabinet body 1, and a plurality of metal shielding boxes 4 are arranged in the cabinet body 1.

[0026] refer to Figure 2 , and also includes a metal plate 5 slidably connected between the left and right inner walls of the cabinet 1 through a slide groove and a slider. The front end of the metal shielding box 4 has no cover, and the front side of the metal plate 5 is provided with a plurality of card-connection cavities equidistant from top to bottom. A plurality of baffles 51 are continuously card-connected from left to right in the plurality of card-connection cavities. The height of the baffle 51 is not less than the height of the front end opening of the metal shielding box 4. The wire inlet hole 2 is located in front of the baffle 51, and the back of the cabinet door 3 is tightly against the front side of the metal plate 5.

[0027] Specifically, it is convenient for workers to connect the electrical equipment in multiple metal shielding boxes 4. After the wiring is completed, the metal plate 5 can be directly slid into the cabinet 1 to complete the shielding of all the electrical equipment in the metal shielding boxes 4, which effectively simplifies the installation and connection work of the electrical equipment and improves the practicability of the low-voltage cabinet.

[0028] Example 2

[0029] According to Example 1, please refer to Figure 3 and Figure 6 The metal shielding box 4 includes a back plate 41, and two groups of limit rods 42 are symmetrically fixedly connected to the front side of the back plate 41. The metal shielding box 4 also includes two symmetrically arranged side plates 43, and two groups of limit holes 44 are symmetrically opened on the front side of the two side plates 43. The rear ends of the limit holes 44 pass through the back sides of the side plates 43. The two side plates 43 are movably connected to the outer peripheral surfaces of the two groups of limit rods 42 through the two groups of limit holes 44. Two cross plates 45 are symmetrically slidably connected between the two side plates 43 through sliders and sliding grooves. A plastic mounting plate 46 is fixedly connected to the front side of the back plate 41.

[0030] Specifically, the staff can pull out the two side panels 43 or the two horizontal panels 45 according to installation needs, thereby leaving enough space for installing the electrical equipment in the metal shielding box 4, further simplifying the installation of the electrical equipment. At the same time, the plastic mounting plate 46 can facilitate the staff to fix the electrical equipment to the plastic mounting plate 46 by bolts.

[0031] Example 3

[0032] According to Example 1 or 2, please refer to Figure 4 , 6 And 7, also include a displacement assembly 6 for driving the metal shielding box 4 to move up and down, the displacement assembly 6 includes a plurality of square rods 61 fixedly connected to the inner bottom wall of the cabinet 1 at equal distances from left to right, a plurality of sliding sleeves 62 are slidably connected to the plurality of square rods 61 from top to bottom, the front sides of the plurality of sliding sleeves 62 are fixedly connected to the metal shielding box 4, and the adjacent sides of the metal shielding boxes 4 on the left and right are fitted together, and the displacement assembly 6 also includes a fixing unit 63 for fixing the sliding sleeve 62.

[0033] Specifically, the metal shielding boxes 4 can be moved up and down so that the two metal shielding boxes 4 adjacent to each other downward can be pressed against each other, and then the horizontal plate 45 in the middle can connect the multiple metal shielding boxes 4 arranged vertically together, so as to facilitate shielding of electrical equipment with a larger height. The four metal shielding boxes 4 adjacent to each other up, down, left and right can also be moved together, and then the horizontal plate 45 and the side plate 43 in the middle can be pulled out, so that the four metal shielding boxes 4 in the shape of a triangle can be connected together, so as to accommodate electrical equipment with a larger width, which can effectively improve the practicality of the power cabinet.

[0034] refer to Figure 6 and Figure 7 The fixing unit 63 includes two groups of top rods 631 movably inserted in the front of the sliding sleeve 62. The rear ends of the two groups of top rods 631 pass through the front of the sliding sleeve 62 and contact the front of the square rod 61. A fixing plate 632 is fixedly connected between the front ends of the two groups of top rods 631. Two groups of elastic members 633 are symmetrically fixedly connected between the back of the fixing plate 632 and the front of the sliding sleeve 62. The back plate 41 is fixedly connected to the front of the fixing plate 632.

[0035] Specifically, the staff only needs to pull the back plate 41 outward to overcome the elastic force of the elastic member 633 so that the rear end of the top rod 631 is separated from the front of the square rod 61, so that the sliding sleeve 62 and the metal shielding box 4 thereon can move up and down smoothly along the square rod 61. When moving to the target position, the back plate 41 is directly released, and the top rod 631 can be tightly pressed against the front of the square rod 61 again under the elastic force of the elastic member 633 to complete the fixed limit of the metal shielding box 4, which effectively simplifies the contact limit and fixed limit operations of the metal shielding box 4 and greatly improves the practicality of the power cabinet.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage cabinet with a shielding effect, comprising a cabinet body (1), a row of cable inlet holes (2) are provided on the top of the cabinet body (1), and a cabinet door (3) is hingedly connected to the front side of the cabinet body (1), characterized in that: A plurality of metal shielding boxes (4) are arranged in the cabinet (1).

2. A low-voltage cabinet with shielding effect according to claim 1, characterized in that: It also includes a metal plate (5) slidably connected between the left and right inner walls of the cabinet (1) through a sliding groove and a slider, the front end of the metal shielding box (4) has no cover, the front of the metal plate (5) is provided with a plurality of card-connecting cavities equidistant from top to bottom, and a plurality of baffles (51) are continuously card-connected in the plurality of card-connecting cavities from left to right, the height of the baffles (51) is not less than the height of the front end opening of the metal shielding box (4), and the wire entry hole (2) is located in front of the baffle (51).

3. A low-voltage cabinet with shielding effect according to claim 2, characterized in that: The metal shielding box (4) includes a back plate (41), and two groups of limit rods (42) are symmetrically fixedly connected to the front of the back plate (41). The metal shielding box (4) also includes two symmetrically arranged side plates (43), and two groups of limit holes (44) are symmetrically opened on the front of the two side plates (43). The rear ends of the limit holes (44) pass through the back of the side plates (43). The two side plates (43) are movably sleeved on the outer peripheral surfaces of the two groups of limit rods (42) through the two groups of limit holes (44). Two cross plates (45) are symmetrically slidably connected between the two side plates (43) through sliders and sliding grooves. The front of the back plate (41) is fixedly connected to a plastic mounting plate (46).

4. A low-voltage cabinet with shielding effect according to claim 3, characterized in that: The invention also comprises a displacement assembly (6) for driving the metal shielding box (4) to move up and down, the displacement assembly (6) comprising a plurality of square rods (61) fixedly connected to the inner bottom wall of the cabinet (1) at equal distances from left to right, a plurality of sliding sleeves (62) being slidably connected to the plurality of square rods (61) from top to bottom, the front faces of the plurality of sliding sleeves (62) being fixedly connected to the metal shielding box (4), and the adjacent side faces of the metal shielding boxes (4) on the left and right being in contact with each other, and the displacement assembly (6) further comprises a fixing unit (63) for fixing the sliding sleeves (62).

5. The low-voltage cabinet with shielding effect according to claim 4, characterized in that: The fixing unit (63) comprises two groups of push rods (631) movably plugged into the front face of the sliding sleeve (62); the rear ends of the two groups of push rods (631) penetrate the front face of the sliding sleeve (62) and contact the front face of the square rod (61); a fixing plate (632) is fixedly connected between the front ends of the two groups of push rods (631); two groups of elastic members (633) are symmetrically fixedly connected between the back face of the fixing plate (632) and the front face of the sliding sleeve (62); and the back plate (41) is fixedly connected to the front face of the fixing plate (632).

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