Shielding type electrical control cabinet

Abstract

The utility model provides a shielding type electrical control cabinet, which is applied to the field of control cabinets, and is characterized in that the shielding type electrical control cabinet comprises a control cabinet body, and the control cabinet body is electrically connected with a grounding conductor; the shielding box is arranged in the control cabinet body and used for containing components, and the shielding box is electrically connected with the control cabinet body through a first power connection conductor, so that the shielding box and the control cabinet body form a whole and are jointly connected with the ground; the electric appliance cabinet has the technical effects that the influence of electromagnetic induction generated by the operation of the electric appliance cabinet on the work of components in the electric appliance cabinet can be reduced, and the stability and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the field of control cabinets, in particular to a shielding type electrical control cabinet. Background Art

[0002] A control cabinet is a device that assembles switchgear, measuring instruments, protective electrical appliances, and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to electrical wiring requirements. Its layout should meet the requirements of the normal operation of the power system, be convenient for maintenance, and not endanger the safety of personnel and surrounding equipment.

[0003] Due to the large current flowing into the internal functional units of the electrical cabinet, especially the busbars, which often reach thousands of amperes, electromagnetic induction occurs. The existence of electromagnetic induction will affect the normal operation of components, and at the same time, eddy currents will be generated on the cabinet frame structure and plates. The eddy currents will cause the cabinet to heat up. In harsh environments, it will seriously affect the normal operation of each component of the cabinet. Therefore, it is necessary to design a shielding type electrical control cabinet to meet the requirements of the safe and stable operation of components. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a shielding type electrical control cabinet, and its advantage is that it can reduce the influence of electromagnetic induction generated during the operation of the electrical cabinet on the components inside the electrical cabinet, and improve stability and safety.

[0005] To achieve the above purpose and other related purposes, the utility model provides the following technical solution: A shielding type electrical control cabinet, comprising:

[0006] A control cabinet body, and a grounding conductor is electrically connected to the control cabinet body;

[0007] A shielding box built in the control cabinet body for accommodating components, and the shielding box is electrically connected to the control cabinet body through a first power connection conductor, so that the shielding box and the control cabinet body form an integral whole and are jointly connected to the ground.

[0008] Through the above technical solution, the electromagnetic induction generated during the operation of the electrical control cabinet is introduced from inside the shielding box into the control cabinet body through the first power connection conductor, and then introduced into the ground through the grounding conductor. This solution forms an integral whole of the control cabinet body and the shielding box, quickly conducts the electromagnetic induction generated by the internal components into the ground, reduces the mutual interference of the internal components, and further enhances stability and safety. At the same time, since the control cabinet body and the shielding box form an integral whole, it can effectively block external signal interference and enhance the stability of the operation of the electrical control cabinet.

[0009] In an embodiment of the utility model, a plurality of mounting plates for mounting components are installed on the control cabinet body, and the mounting plates are electrically connected to the control cabinet body.

[0010] Through the above technical solution, the installation flat plate and the control cabinet body form an integral whole, which can achieve the rapid transfer of electromagnetic and effectively shield external signals, further enhancing stability.

[0011] In an embodiment of the present utility model, anti-static paint is coated on both the control cabinet body and the installation flat plate, and a fixing component is further included for fixedly connecting the control cabinet body and the installation flat plate and electrically connecting the control cabinet body and the installation flat plate.

[0012] Through the above technical solution, the anti-static paint can effectively reduce the static electricity accumulation on the electrical control cabinet, further improving the operation stability of the electrical control cabinet.

[0013] In an embodiment of the present utility model, the fixing component includes:

[0014] A fastening bolt; and a first toothed washer disposed between the control cabinet body and the fastening bolt and a second toothed washer disposed between the installation flat plate and the fastening bolt. Both the first toothed washer and the second toothed washer are electrically connected to the fastening bolt. The first toothed washer and the second toothed washer are locked by the fastening bolt and respectively penetrate through the anti-static paint on the surfaces of the control cabinet body and the installation flat plate, so that the first toothed washer is electrically connected to the control cabinet body and the second toothed washer is electrically connected to the installation flat plate.

[0015] Through the above technical solution, the first toothed washer and the second toothed washer are respectively electrically connected to the control cabinet body and the installation flat plate, and both are electrically connected to the fastening bolt. Thus, while fixing the control cabinet body and the installation flat plate, their electrical connection is realized, making the installation flat plate and the control cabinet body form an integral whole, which can achieve the rapid transfer of electromagnetic and effectively shield external signals, further enhancing stability.

[0016] In an embodiment of the present utility model, the anti-static paint is set as epoxy resin paint or chloroprene rubber paint.

[0017] Through the above technical solution, the epoxy resin paint or chloroprene rubber paint can effectively reduce the static electricity accumulation on the electrical control cabinet, further improving the operation stability of the electrical control cabinet.

[0018] In an embodiment of the present utility model, the control cabinet body includes a frame body and a cabinet door hinged to the frame body, and the cabinet door and the frame body are electrically connected through a second electrical connection conductor.

[0019] Through the above technical solution, the frame body and the cabinet door form an integral whole, enhancing the electromagnetic shielding effect.

[0020] In an embodiment of the present utility model, a signal transmission cable is provided inside the control cabinet body. The signal transmission cable includes a conductor arranged from the inside out, a first shielding layer formed by wrapping an electromagnetic shielding film, a second shielding layer formed by wrapping a copper film or an aluminum film, a braided copper mesh layer, and an insulating layer.

[0021] Through the above technical solution, the electromagnetic shielding film can achieve a good electromagnetic shielding effect, and the copper film or aluminum film and the braided copper mesh can enhance the electromagnetic shielding effect of the signal transmission cable, isolating the electromagnetic interference of external signals on the signal transmission cable.

[0022] In an embodiment of the present utility model, the power connection conductor is arranged as a first electric wire, and both ends of the first electric wire are fixed to the shielding box and the control cabinet body respectively through bolts.

[0023] Through the above technical solution, the first electric wire electrically connects the shielding box and the control cabinet body, making the two form an electromagnetic shielding whole and reducing electromagnetic interference.

[0024] As described above, a shielding type electrical control cabinet of the present utility model has the following beneficial effects:

[0025] The electromagnetic induction generated during the operation of the electrical control cabinet is introduced from inside the shielding box to the control cabinet body through the first contact conductor, and then introduced to the ground through the grounding conductor. By forming a whole of the control cabinet body and the shielding box, this solution quickly conducts the electromagnetic induction generated by the internal components to the ground, reduces the mutual interference of the internal components, thereby enhancing stability and safety. At the same time, since the control cabinet body and the shielding box form a whole, it can effectively block external signal interference and enhance the stability of the operation of the electrical control cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It shows the front view of the shielding type electrical control cabinet disclosed in the embodiment of the present utility model.

[0027] Figure 2 It shows Figure 1 The enlarged schematic view of part A in

[0028] Figure 3 It shows the side view of the shielding type electrical control cabinet disclosed in the embodiment of the present utility model.

[0029] Figure 4 It shows the internal schematic view of the shielding type electrical control cabinet disclosed in the embodiment of the present utility model.

[0030] Figure 5 It shows the schematic view of the fixing component of the shielding type electrical control cabinet disclosed in the embodiment of the present utility model.

[0031] Figure 6It shows a schematic diagram of the signal transmission cable of the shielded electrical control cabinet disclosed in the embodiment of the present invention.

[0032] Explanation of the reference numerals of each technical feature in the drawings:

[0033] 1. Control cabinet body; 2. Grounding conductor; 3. Shielding box; 4. First power connection conductor; 5. Installation flat plate; 6. Fixing component; 7. Frame body; 8. Cabinet door; 9. First shielding layer; 10. Second shielding layer; 11. Braided copper mesh layer; 12. Insulating layer; 13. Second power connection conductor; 14. Signal transmission cable; 61. Fastening bolt; 62. First toothed washer; 63. Second toothed washer. Detailed implementation manners

[0034] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0035] Please refer to Figure 1 and Figure 3 , the present invention provides a shielded electrical control cabinet, including:

[0036] A control cabinet body 1, the control cabinet body 1 includes a frame body 7 and a cabinet door 8 hinged to the frame body 7. A grounding conductor 2 is electrically connected to the frame body 7. The grounding conductor 2 is set as a grounding wire. One end of the grounding wire is fixed to the frame body 7 by a bolt, and the other end is in contact with the ground.

[0037] Please refer to Figure 2 , the cabinet door 8 and the frame body 7 are electrically connected through a second power connection conductor 13. The second power connection conductor 13 is set as a second wire. Both ends of the second wire are fixed to the cabinet door 8 and the frame body 7 by bolts respectively, so that the frame body 7 and the cabinet door 8 are electrically connected to form an integral body.

[0038] Please refer to Figure 3 , a plurality of installation flat plates 5 for installing components are installed on the control cabinet body 1. Anti-static paint is coated on both the control cabinet body 1 and the installation flat plates 5. In this embodiment, the anti-static paint is set as epoxy resin paint, and in other embodiments, chloroprene rubber paint can also be used instead. The anti-static paint can effectively reduce the static electricity accumulation on the electrical control cabinet and improve the operation stability of the electrical control cabinet; it also includes a fixing component 6 for fixedly connecting the control cabinet body 1 and the installation flat plates 5 and making the control cabinet body 1 and the installation flat plates 5 electrically connected.

[0039] Please refer to Figure 5, the fixing component 6 includes: a fastening bolt 61 for locking and fixing the mounting flat plate 5 and the control cabinet body 1; and a first toothed washer 62 disposed between the control cabinet body 1 and the fastening bolt 61 and a second toothed washer 63 disposed between the mounting flat plate 5 and the fastening bolt 61. Both the first toothed washer 62 and the second toothed washer 63 are electrically connected to the fastening bolt 61. The first toothed washer 62 and the second toothed washer 63 penetrate the antistatic paint on the surfaces of the control cabinet body 1 and the mounting flat plate 5 respectively under the tightening of the fastening bolt 61, so that the first toothed washer 62 is electrically connected to the control cabinet body 1 and the second toothed washer 63 is electrically connected to the mounting flat plate 5, and the mounting flat plate 5 and the control cabinet body 1 are electrically connected through the conduction of the first toothed washer 62, the second toothed washer 63 and the fastening bolt 61.

[0040] Please refer to Figure 3 and Figure 6 , a signal transmission cable 14 is provided in the control cabinet body 1. The signal transmission cable 14 includes a conductor arranged from the inside to the outside, a first shielding layer 9 covered by an electromagnetic shielding film, a second shielding layer 10 covered by a copper film or an aluminum film, a braided copper mesh layer 11 and an insulating layer 12. The electromagnetic shielding film can achieve a good electromagnetic shielding effect. The copper film or aluminum film and the braided copper mesh can enhance the electromagnetic shielding effect of the signal transmission cable 14 and isolate the electromagnetic interference of external signals on the signal transmission cable 14.

[0041] Please refer to Figure 4 , further includes a shielding box 3 built in the control cabinet body 1 for accommodating components. The shielding box 3 is a closed shell made of conductive or magnetic materials, usually made of aluminum, steel or silver-plated steel. By physically isolating the external electromagnetic field or preventing the internal electromagnetic field from leaking, the shielding box 3 is electrically connected to the control cabinet body 1 through a first electrical connection conductor 4. The first electrical connection conductor 4 is set as a first wire, and both ends of the first wire are fixed to the shielding box 3 and the control cabinet body 1 by bolts respectively, so that the shielding box 3 and the control cabinet body 1 form an integral body and are connected to the ground together, which can quickly conduct the electromagnetic induction generated by the internal components to the ground, reduce the mutual interference of the internal components, and thus enhance the stability and safety. At the same time, since the control cabinet body 1 and the shielding box 3 form an integral body, it can more effectively block the external signal interference and enhance the stability of the operation of the electrical control cabinet.

[0042] During the operation of the electrical control cabinet of the present utility model, the electromagnetic induction generated is introduced from within the shielding box 3 through the first contact conductor into the control cabinet body 1, and then introduced into the ground through the grounding conductor 2. By forming an integral whole of the control cabinet body 1 and the shielding box 3, this solution quickly conducts the electromagnetic induction generated by the internal components into the ground, reduces the mutual interference of the internal components, thereby enhancing stability and safety. At the same time, since the control cabinet body 1 and the shielding box 3 form an integral whole, it can effectively block external signal interference and enhance the stability of the operation of the electrical control cabinet.

[0043] The above embodiments merely illustrate the principles and effects of the present utility model and are not intended to limit the present utility model. All equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A shielded electrical control cabinet, characterized in that, Including: A control cabinet body (1), and a grounding conductor (2) is electrically connected to the control cabinet body (1) when powered on; A shielding box (3) built in the control cabinet body (1) for accommodating components, and the shielding box (3) is electrically connected to the control cabinet body (1) through a first power connection conductor (4) so that the shielding box (3) and the control cabinet body (1) form an integral whole and are commonly connected to the ground.

2. The shielded electrical control cabinet according to claim 1, wherein A plurality of mounting plates (5) for mounting components are installed on the control cabinet body (1), and the mounting plates (5) are electrically connected to the control cabinet body (1).

3. The shielded electrical control cabinet according to claim 2, wherein Antistatic paint is coated on both the control cabinet body (1) and the mounting plates (5), and a fixing component (6) is further included for fixedly connecting the control cabinet body (1) and the mounting plates (5) and enabling electrical connection between the control cabinet body (1) and the mounting plates (5).

4. The shielded electrical control cabinet according to claim 3, characterized in that, The fixing component (6) includes: A fastening bolt (61); and a first toothed washer (62) disposed between the control cabinet body (1) and the fastening bolt (61) and a second toothed washer (63) disposed between the mounting plate (5) and the fastening bolt (61). The first toothed washer (62) and the second toothed washer (63) are both electrically connected to the fastening bolt (61). The first toothed washer (62) and the second toothed washer (63) are locked by the fastening bolt (61) and penetrate through the antistatic paint on the surfaces of the control cabinet body (1) and the mounting plate (5) respectively, so that the first toothed washer (62) is electrically connected to the control cabinet body (1) and the second toothed washer (63) is electrically connected to the mounting plate (5).

5. The shielded electrical control cabinet according to claim 3, characterized in that The antistatic paint is set as epoxy resin paint or chloroprene rubber paint.

6. The shielded electrical control cabinet according to claim 1, characterized in that The control cabinet body (1) includes a frame body (7) and a cabinet door (8) hinged to the frame body (7), and the cabinet door (8) is electrically connected to the frame body (7) through a second power connection conductor (13).

7. The shielded electrical control cabinet according to claim 1, wherein A signal transmission cable (14) is provided in the control cabinet body (1), and the signal transmission cable (14) includes a conductor arranged from the inside to the outside, a first shielding layer (9) coated with an electromagnetic shielding film, a second shielding layer (10) coated with a copper film or an aluminum film, a braided copper mesh layer (11), and an insulating layer (12).

8. The shielded electrical control cabinet according to claim 1, wherein, The first power connection conductor (4) is set as a first electric wire, and both ends of the first electric wire are fixed to the shielding box (3) and the control cabinet body (1) through bolts.

Images