Electrical cabinet safe to operate

Abstract

The utility model discloses an electrical cabinet safe to operate, and belongs to the technical field of electrical cabinet design. Comprising a cabinet body; the frequency conversion system is fixed in the cabinet body; the strong current control system is used for controlling the frequency conversion system; the weak current operation system is used for controlling the strong current control system; the strong current cable is sequentially connected with the strong current control system and the frequency conversion system in series; and the weak current cable is sequentially connected in series with the weak current operation system and the strong current control system. The electrical cabinet has the beneficial effects that non-contact control of a worker on strong current is realized, and the electrical cabinet is relatively low in risk and safe to operate.

Description

Technical Field

[0001] This application relates to the technical field of electrical cabinet design. Specifically, it relates to an electrical cabinet with safe operation. Background Art

[0002] High-voltage electricity generally refers to the power supply systems such as the mains power system and lighting system, including air-conditioning lines, lighting lines, socket lines, power lines, high-voltage lines, etc. It is characterized by high power, large current, and low frequency. Therefore, when controlling a variable-frequency system, if staff directly contact and operate on high-voltage electricity, the risk is usually relatively high. Summary of the Invention

[0003] The content part of this application is used to briefly introduce concepts, which will be described in detail in the specific implementation part later. The content part of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0004] To solve the technical problems mentioned in the above background art part, some embodiments of this application provide an electrical cabinet with safe operation, including: a cabinet body; a variable-frequency system fixed in the cabinet body; a high-voltage electricity control system for controlling the variable-frequency system; a low-voltage electricity operation system for controlling the high-voltage electricity control system; high-voltage electric cables successively connecting the high-voltage electricity control system and the variable-frequency system in series; and low-voltage electric cables successively connecting the low-voltage electricity operation system and the high-voltage electricity control system in series.

[0005] Furthermore, it further includes: a shielding plate; the shielding plate is fixed in the cabinet body, and the shielding plate divides the interior of the cabinet body into a high-voltage electricity chamber and a low-voltage electricity chamber; the variable-frequency system, the high-voltage electricity control system, and the high-voltage electric cables are placed in the high-voltage electricity chamber; the low-voltage electricity operation system is placed in the low-voltage electricity chamber, and one end of the low-voltage electric cables passes through the shielding plate to connect the high-voltage electricity control system and the low-voltage electricity operation system.

[0006] Furthermore, the high-voltage electricity control system includes: a relay, a first filter, and a first circuit breaker; the low-voltage electricity operation system includes: a second filter, a PLC controller, and a second circuit breaker; the high-voltage electric cables are connected in series with the relay, the first filter, the first circuit breaker, and the variable-frequency system, and the low-voltage electric cables are connected in series with the second filter, the PLC controller, the second circuit breaker, and the relay.

[0007] Furthermore, the variable-frequency system includes: an inverter and a switch module; the inverter and the switch module are connected in series on the high-voltage electric cables.

[0008] Furthermore, the switch module includes: a first switch and a second switch; the first switch and the second switch are connected in parallel on the high-voltage electric cables.

[0009] Further, a plurality of inlet holes are respectively formed at the upper and lower ends of the cabinet body, and the strong electric cable and the weak electric cable can pass through any one of the inlet holes to enter the cabinet body.

[0010] Further, it further includes: a grounding cable; one end of the grounding cable contacts the ground, and the other end of the grounding cable passes through the inlet hole and is connected to the frequency conversion system.

[0011] The beneficial effects of the present application are as follows:

[0012] Workers contact the weak electric operating system to control the start and stop of the strong electric operating system through the weak electric cable. Furthermore, the strong electric control system controls the switch of the frequency conversion system through the strong electric cable, realizing non-contact control of the strong electric by workers, with relatively small danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of the present application are used to provide a further understanding of the present application, making other features, objects, and advantages of the present application more obvious. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application.

[0014] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and components are not necessarily drawn to scale.

[0015] In the drawings:

[0016] Figure 1 is the overall schematic diagram according to the embodiment of the present application.

[0017] Reference Numerals:

[0018] 1. Cabinet body; 2. Frequency conversion system; 21. Frequency converter; 22. First switch; 23. Second switch; 3. Strong electric control system; 31. Relay; 32. First filter; 33. First circuit breaker; 4. Weak electric operating system; 41. Second filter; 42. PLC controller; 43. Second circuit breaker; 5. Strong electric cable; 6. Weak electric cable; 7. Shielding plate; 8. Grounding cable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0020] In addition, it should be noted that for the convenience of description, only the parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0021] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.

[0022] It should be noted that the modification of "one" and "multiple" mentioned in the present disclosure is illustrative rather than restrictive. Those skilled in the art should understand that unless clearly stated otherwise in the context, it should be understood as "one or more".

[0023] The present disclosure will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0024] Refer to Figure 1 ,

[0025] An electrically operated cabinet with safe operation includes: a cabinet body 1, a frequency conversion system 2, a high-voltage control system 3, a low-voltage operation system 4, high-voltage cables 5, and low-voltage cables 6. The frequency conversion system 2 is fixed in the cabinet body 1. The high-voltage cables 5 are sequentially connected in series with the high-voltage control system 3 and the frequency conversion system 2. The high-voltage control system 3 controls the connection and disconnection of the high-voltage cables 5, thereby controlling the startup and shutdown of the frequency conversion system 2. The low-voltage cables 6 are sequentially connected in series with the low-voltage operation system 4 and the high-voltage control system 3. Workers contact the low-voltage operation system 4 to control the startup and shutdown of the high-voltage control system 3, and thereby indirectly control the startup and shutdown of the frequency conversion system 2.

[0026] Specifically, it further includes: a shielding plate 7. The shielding plate 7 is welded and fixed in the cabinet body 1. The shielding plate 7 divides the interior of the cabinet body 1 into a high-voltage chamber and a low-voltage chamber. The frequency conversion system 2, the high-voltage control system 3, and the high-voltage cables 5 are placed in the high-voltage chamber. The low-voltage operation system 4 is placed in the low-voltage chamber. One end of the low-voltage cables 6 passes through the shielding plate 7 to connect the high-voltage control system 3 and the low-voltage operation system 4. The shielding plate 7 is used to prevent the electromagnetic field generated by the high-voltage cables 5 from interfering with the low-voltage operation system 4.

[0027] Specifically, the high-voltage control system 3 includes: a relay 31, a first filter 32, and a first circuit breaker 33. The low-voltage operating system includes: a second filter 41, a PLC controller 42, and a second circuit breaker 43. The first circuit breaker 33 is a first air switch. When a large inrush current flows in from the external power supply through the high-voltage cable 5, the first circuit breaker 33 will automatically disconnect to prevent the frequency conversion system 2 from being overloaded and burned out. The second circuit breaker 43 is a second air switch. When a large inrush current flows in from the external power supply through the low-voltage cable 6, the second circuit breaker 43 will automatically disconnect to prevent the PLC controller 42 from being overloaded and burned out. The first filter 32 is a first EMC filter, and the second filter 41 is a second EMC filter. The first filter 32 is used to suppress high-order harmonics in the high-voltage cable 5 and improve the power factor. The second filter 41 is used to suppress high-order harmonics in the low-voltage cable 6 and improve the power factor. The high-voltage cable 5 is connected in series with the relay 31, the first filter 32, the first circuit breaker 33, and the frequency conversion system 2. The low-voltage cable 6 is connected in series with the second filter 41, the PLC controller 42, the second circuit breaker 43, and the relay 31. The relay 31 is a common electrical component. The PLC controller 42 controls the current passing through the low-voltage cable 6 to control the connection and disconnection of the relay 31 to the high-voltage cable 5. The high-voltage cable 5 and the low-voltage cable 6 connected to the relay 31 do not contact each other, so that the PLC controller can indirectly control the power-on and power-off of the high-voltage cable 5.

[0028] Specifically, the frequency conversion system 2 includes: an inverter 21 and a switch module. The inverter 21 and the switch module are connected in series to the high-voltage cable 5. The switch module is used to directly control the power-on and power-off of the high-voltage cable 5 to the inverter 21.

[0029] Specifically, the switch module includes: a first switch 22 and a second switch 23. The first switch 22 and the second switch 23 are connected in parallel to the high-voltage cable 5. Only when the worker closes both the first switch 22 and the second switch 23 can the inverter 21 be powered off and closed to avoid the inverter 21 being closed due to the worker's misoperation.

[0030] Specifically, a plurality of inlet holes are respectively formed at the upper and lower ends of the cabinet body 1. In this embodiment, two inlet holes are respectively formed at the upper and lower ends. The high-voltage cable 5 and the low-voltage cable 6 can pass through any one of the inlet holes and enter the cabinet body 1 to facilitate the wiring of the high-voltage cable 5 and the low-voltage cable 6.

[0031] Specifically, it further includes: a grounding cable 8. Since the outer shell of the inverter 21 is made of metal, one end of the grounding cable 8 contacts the ground, and the other end of the grounding cable 8 passes through the inlet hole and is connected to the outer shell of the inverter 21 in the frequency conversion system 2 to avoid the inverter 21 from leaking electricity and causing injury to the staff.

[0032] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the embodiments of the present disclosure that have similar functions.

Claims

1. An electrically operated cabinet with safe operation, characterized in that, Comprising: Cabinet body; Frequency conversion system, fixed in the cabinet body; High-voltage control system, used to control the frequency conversion system; Low-voltage operation system, used to control the high-voltage control system; High-voltage cable, successively connecting in series the high-voltage control system and the frequency conversion system; Low-voltage cable, successively connecting in series the low-voltage operation system and the high-voltage control system.

2. The operation-safe electrical cabinet according to claim 1, characterized in that: It further comprises: a shielding plate; the shielding plate is fixed in the cabinet body, and the shielding plate divides the interior of the cabinet body into a high-voltage chamber and a low-voltage chamber; the frequency conversion system, the high-voltage control system and the high-voltage cable are placed in the high-voltage chamber; the low-voltage operation system is placed in the low-voltage chamber, and one end of the low-voltage cable passes through the shielding plate to connect the high-voltage control system and the low-voltage operation system.

3. The operation-safe electrical cabinet according to claim 2, characterized in that: The high-voltage control system comprises: a relay, a first filter and a first circuit breaker; the low-voltage operation system comprises: a second filter, a PLC controller and a second circuit breaker; the high-voltage cable connects in series the relay, the first filter, the first circuit breaker and the frequency conversion system, and the low-voltage cable connects in series the second filter, the PLC controller, the second circuit breaker and the relay.

4. The operation-safe electrical cabinet according to any one of claims 1-3, characterized in that: The frequency conversion system comprises: an inverter and a switch module; the inverter and the switch module are connected in series on the high-voltage cable.

5. The operation-safe electrical cabinet according to claim 4, characterized in that: The switch module comprises: a first switch and a second switch; the first switch and the second switch are connected in parallel on the high-voltage cable.

6. The operation-safe electrical cabinet according to claim 1, characterized in that: Multiple inlet holes are respectively formed at the upper and lower ends of the cabinet body, and the high-voltage cable and the low-voltage cable can pass through any one of the inlet holes to enter the cabinet body.

7. The operation-safe electrical cabinet according to claim 6, characterized in that: It further comprises: Grounding cable; One end of the grounding cable contacts the ground, and the other end of the grounding cable passes through the inlet hole to be connected to the frequency conversion system.

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