Switch cabinet
By rationally laying out the cavity and devices in the switch cabinet, adding transformer functions, setting precharge resistors and heat dissipation components, the existing switch cabinet has solved the problem of single functions and not compact structure, and achieved a high power density and low cost switch cabinet design.
Patent Information
- Application Number
- CN202422119644.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing switch cabinet has a single function, a not compact structure, and a low power density.
The cavity in the cabinet is divided into the left front cavity, the right front cavity, the right rear cavity and the left rear cavity. The grounding switch is fixed in the middle of the left front cavity, the transformer is fixed in the lower part of the right front cavity, the first circuit breaker is fixed in the upper part of the right front cavity, and the precharge resistor is connected in parallel, voltage transformers and current transformers are added, heat exchange components and heat dissipation fans are set, and the mechanical interlocking device controls the opening of the cabinet door.
It realizes convenient connection between components, reduces wiring costs, increases power density, increases the step-down and boost function of the transformer, saves the transformer box setting, reduces costs, and ensures maintenance safety.
Smart Images
Figure CN223181647U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to a switch cabinet. Background Art
[0002] The primary function of switchgear is to open and close, control, and protect electrical equipment during power generation, transmission, distribution, and conversion in power systems. Existing switchgear typically includes components such as circuit breakers, grounding switches, and mechanical interlocks connected to the cabinet doors. After the circuit breaker is de-energized, the mechanical interlocks must be connected to the grounding switch to open the cabinet doors. This ensures personal safety and equipment protection during electrical equipment maintenance. Existing switchgear consists of only traditional components, resulting in limited functionality, a non-compact structure, and low power density.
[0003] Therefore, there is an urgent need to develop a switch cabinet with multiple integrated functions, simple and compact structure and high power density. Utility Model Content
[0004] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a power module with multiple integrated functions, simple and compact structure and high power density, aiming to solve one of the above technical problems.
[0005] A switch cabinet comprises: a cabinet body having a cabinet door, a first circuit breaker arranged in the cabinet body, a grounding switch, a transformer, and a mechanical interlocking device respectively connected to the grounding switch and the cabinet door; the cavity in the cabinet body is divided into a left front cavity, a right front cavity, a right rear cavity, and a left rear cavity; the grounding switch is fixed to the middle of the left front cavity, the transformer is fixed to the lower part of the right front cavity, the first circuit breaker is fixed to the upper part of the right front cavity, the grounding switch is connected to the input end of the transformer, and the transformer and the first circuit breaker are connected in series.
[0006] Preferably, a second circuit breaker is provided in the upper part of the left front cavity in the above-mentioned cabinet body, an outlet is provided at the position of the second circuit breaker in the cabinet body, a pre-charging resistor is provided at the outlet outside the cabinet body, the second circuit breaker and the pre-charging resistor are connected in parallel, and the output end of the first circuit breaker is electrically connected to the input end of the second circuit breaker and the pre-charging resistor respectively.
[0007] Preferably, a voltage transformer for measuring the transformer voltage is provided at the lower portion of the left rear cavity in the cabinet.
[0008] Preferably, a current transformer for measuring the transformer current is provided at the upper portion of the right rear cavity in the cabinet.
[0009] Preferably, a heat exchange component is provided in the middle of the right front cavity in the cabinet.
[0010] Preferably, a first partition board with a first ventilation opening is arranged behind the heat exchange component in the cabinet body, a second partition board for isolating the earthing switch is arranged on the left side of the heat exchange component in the cabinet body, a third partition board is arranged behind the transformer, the lower part of the third partition board has a second ventilation opening, and the back of the first circuit breaker has a third ventilation opening.
[0011] Preferably, a fourth partition board is arranged at the corresponding position of the voltage transformer at the lower part of the left front cavity in the cabinet body.
[0012] Preferably, busbars are arranged in the upper middle parts of the left rear cavity and the right rear cavity in the cabinet body.
[0013] Preferably, the cabinet door includes a left front door panel, a right front door panel and a left side door panel. The mechanical interlocking device is arranged at the corresponding position of the earthing switch on the left front door panel, and travel switches for controlling the on-off of the first circuit breaker are arranged at the upper ends of the left front door panel, the right front door panel and the left side door panel of the cabinet body.
[0014] Preferably, a cooling fan is arranged in the upper part of the left rear cavity in the cabinet body.
[0015] Compared with the prior art, the utility model has the following advantages: The switch cabinet of the utility model reasonably divides the inner cavity of the cabinet body into a left front cavity, a right front cavity, a right rear cavity and a left rear cavity. The earthing switch is fixed in the middle of the left front cavity, the transformer is fixed at the lower part of the right front cavity, and the first circuit breaker is fixed at the upper part of the right front cavity. The layout of the components is beneficial to the connection between the earthing switch and the transformer, and between the transformer and the first circuit breaker. The wiring between the components is convenient and beautiful, saving the wiring length and reducing the wiring cost of the switch cabinet. The switch cabinet of the utility model integrates the transformer, the first circuit breaker and the earthing switch into one cabinet body, with reasonable layout, simple and compact structure and high power density.
[0016] The switch cabinet of the utility model integrates a transformer on the basis of the existing switch cabinet, adding the step-down and step-up functions of the transformer, saving the setting of the transformer box body and having low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model.
[0018] Figure 1 is a front structural schematic diagram of a switch cabinet of the present utility model;
[0019] Figure 2 is a back structural schematic diagram of a switch cabinet of the present utility model;
[0020] Figure 3It is a schematic diagram of the cavity structure of a switch cabinet of the present utility model;
[0021] Figure 4 It is a schematic diagram of the front internal structure of a switch cabinet of the present utility model;
[0022] Figure 5 It is a schematic diagram of the back internal structure of a switch cabinet of the present utility model;
[0023] Figure 6 It is a schematic diagram of the structure of the busbar of a switch cabinet of the present utility model;
[0024] Figure 7 It is a schematic diagram of the structure of a switch cabinet of the present utility model when no components are installed;
[0025] Figure 8 It is a schematic diagram of the structure of the air duct of a switch cabinet of the present utility model. Detailed implementation manners
[0026] The present utility model will be further described in conjunction with the following embodiments and drawings:
[0027] A switch cabinet, as Figures 1 to 6 shown, includes: a cabinet body 10 having a cabinet door 11, a first circuit breaker 12, an earthing switch 13, a transformer 14 disposed in the cabinet body 10, and a mechanical interlock device 15 respectively connecting the earthing switch 13 and the cabinet door 11. The cavity in the cabinet body 10 is divided into a left front cavity 16, a right front cavity 17, a right rear cavity 18 and a left rear cavity 19. The earthing switch 13 is fixed in the middle of the left front cavity 16, the transformer 14 is fixed at the lower part of the right front cavity 17, the first circuit breaker 12 is fixed at the upper part of the right front cavity 17. The earthing switch 13 is connected to the input end of the transformer 14, and the transformer 14 is connected in series with the first circuit breaker 12.
[0028] When the equipment operates normally, the earthing switch 13 is disconnected, the first circuit breaker 12 is connected, and the transformer 14 is powered on. Due to the limiting effect of the mechanical interlock device 15, the cabinet door 11 cannot be opened at this time; when electrical equipment needs to be repaired, first disconnect the first circuit breaker 12, then the transformer 14 is powered off, and then manually connect the earthing switch 13, and the mechanical interlock device 15 is unlocked. At this time, the cabinet door 11 can be opened smoothly, thus ensuring personal safety during the repair of electrical equipment.
[0029] The switch cabinet of the present utility model reasonably divides the inner cavity of the cabinet body 10 into a left front cavity 16, a right front cavity 17, a right rear cavity 18, and a left rear cavity 19. The earthing switch 13 is fixed in the middle of the left front cavity 16, the transformer 14 is fixed at the lower part of the right front cavity 17, and the first circuit breaker 12 is fixed at the upper part of the right front cavity 17. The layout of the components is conducive to the connection between the earthing switch 13 and the transformer 14, and between the transformer 14 and the first circuit breaker 12. The wiring between the components is convenient and beautiful, saving the wiring length and reducing the wiring cost of the switch cabinet. The switch cabinet of the present utility model integrates the transformer 14, the first circuit breaker 12, and the earthing switch 13 into one cabinet body 10, with a reasonable layout, a simple and compact structure, and a high power density.
[0030] The switch cabinet of the present utility model integrates the transformer 14 on the basis of the existing switch cabinet, adding the step-down and step-up functions of the transformer 14, saving the setting of the transformer box body and having a low cost.
[0031] Preferably, as Figure 2 shown, a second circuit breaker 20 is provided at the upper part of the left front cavity 16 in the cabinet body 10, an outlet 21 is provided at the position of the second circuit breaker 20 of the cabinet body 10, a pre-charge resistor 22 is provided at the outlet 21 outside the cabinet body 10, the second circuit breaker 20 and the pre-charge resistor 22 are connected in parallel, and the output end of the first circuit breaker 12 is electrically connected to the input ends of the second circuit breaker 20 and the pre-charge resistor 22 respectively.
[0032] The main function of the pre-charge resistor 22 is to protect the components. It can prevent the charging current from being too large at the moment of direct power-on, thus avoiding the damage of the components caused by the excessive instantaneous current. Specifically, at the moment of power-on, the pre-charge resistor 22 conducts, and the second circuit breaker 20 disconnects, which can avoid the damage of the components caused by the excessive instantaneous current; when the current is stable, the pre-charge resistor 22 disconnects, and the second circuit breaker 20 connects, and the circuit operates normally.
[0033] The outlet 21 is provided at the position of the second circuit breaker 20 of the cabinet body 10, and the pre-charge resistor 22 is provided at the outlet 21 outside the switch cabinet. Since the second circuit breaker 20 is provided at the upper part of the left front cavity 16 in the cabinet body 10, such a layout setting facilitates the wiring of the second circuit breaker 20 and the pre-charge resistor 22, can save the wiring length, and further reduces the cost of the switch cabinet.
[0034] The second circuit breaker 20 is provided at the upper part of the left front cavity 16 in the cabinet body 10. Since the first circuit breaker 12 is provided at the upper part of the right front cavity 17 in the cabinet body 10, such a setting has a reasonable layout, a more compact structure, is conducive to the wiring between the first circuit breaker 12 and the second circuit breaker 20, saves the installation and operation time, and saves the wiring length, further reducing the cost of the switch cabinet.
[0035] Preferably, asFigure 5 and Figure 6 As shown in Figure 6 , a voltage transformer 23 for measuring the voltage of transformer 14 is provided at the lower part of the left rear cavity 19 inside the cabinet body 10. Both the transformer 14 and the voltage transformer 23 are provided at the lower part inside the cabinet body 10, with a reasonable layout, a compact structure, convenient wiring operation, and saving of wiring length, further reducing the cost of the switch cabinet.
[0036] Preferably, as Figure 5 and Figure 6 shown, a current transformer 24 for measuring the current of transformer 14 is provided at the upper part of the right rear cavity 18 inside the cabinet body 10. Both the transformer 14 and the current transformer 24 are provided on the right side inside the cabinet body 10, with a reasonable layout, a compact structure, convenient wiring operation, and saving of wiring length, further reducing the cost of the switch cabinet.
[0037] Preferably, as Figure 4 and Figure 5 shown, a heat exchange component 25 is provided in the middle of the right front cavity 17 inside the cabinet body 10. The heat exchange component 25 can be a heat exchange component 25 in the prior art, such as a water-cooled or air-cooled radiator, etc. The heat exchange component 25 is provided in the middle of the right front cavity 17 inside the cabinet body 10, that is, between the first circuit breaker 12 and the transformer 14. Since a large amount of heat is generated when the first circuit breaker 12 and the transformer 14 are operating, this setting is beneficial to the heat dissipation of the first circuit breaker 12 and the transformer 14.
[0038] Preferably, as Figure 7 and Figure 8 shown, a first partition plate 27 with a first ventilation opening 26 is provided behind the heat exchange component 25 inside the cabinet body 10, a second partition plate 28 for isolating the grounding switch 13 is provided on the left side of the heat exchange component 25 of the cabinet body 10, a third partition plate 29 is provided behind the transformer 14, the lower part of the third partition plate 29 has a second ventilation opening 30, and a third ventilation opening 31 is provided behind the first circuit breaker 12.
[0039] When the heat exchange component 25 is working, hot air enters the heat exchange component 25 from the first ventilation opening 26. The heat exchange component 25 absorbs heat, and the hot air cools down to cold air. The cooled cold air enters the upper first circuit breaker 12 and the lower transformer 14 from the upper and lower ends of the heat exchange component 25 respectively. After the cold air absorbs the heat of the first circuit breaker 12, it becomes hot air and flows out from the third ventilation opening 31. After the cold air absorbs the heat of the transformer 14, it becomes hot air and flows out from the second ventilation opening 30. The hot air enters the heat exchange component 25 from the first ventilation opening 26 again, and the above steps are cycled, continuously dissipating heat from the first circuit breaker 12 and the transformer 14, effectively reducing the heat generated during the operation of the first circuit breaker 12 and the transformer 14, avoiding damage to the first circuit breaker 12 and the transformer 14 due to excessive temperature, and thus extending the service life of the switch cabinet.
[0040] Preferably, as Figure 7 shown, a fourth partition plate 32 is provided at the corresponding position of the voltage transformer 23 in the lower part of the left front cavity 16 in the cabinet body 10. The fourth partition plate 32 can isolate the voltage transformer 23 from the left front cavity 16 in the cabinet body 10, facilitating the setting of other weak-current components in the left front cavity 16 of the cabinet body 10 and realizing the isolation of strong current and weak current.
[0041] Preferably, as Figure 6 shown, busbars 33 are provided in the upper middle parts of the left rear cavity 19 and the right rear cavity 18 of the cabinet body 10. By uniformly providing busbars 33 in the upper middle parts of the left rear cavity 19 and the right rear cavity 18 of the cabinet body 10, it is convenient to uniformly arrange the busbars 33 between various components, making the wiring more neat and beautiful.
[0042] Preferably, as Figures 1 to 4 shown, the cabinet door 11 includes a left front door panel 34, a right front door panel 35 and a left side door panel 36. The mechanical interlock device 15 is arranged at the corresponding position of the earthing switch 13 on the left front door panel 34. Travel switches 37 for controlling the on / off of the first circuit breaker 12 are arranged at the upper ends of the left front door panel 34, the right front door panel 35 and the left side door panel 36 of the cabinet body 10.
[0043] The mechanical interlock device 15 is arranged at the corresponding position of the earthing switch 13 on the left front door panel 34, which can facilitate the setting and installation of the mechanical interlock device 15. The travel switch 37 can be a travel switch 37 in the prior art, and its contact is actuated by the collision of the moving part of the production machinery to realize the connection or disconnection of the control circuit, achieving a certain control purpose. Specifically, when the left front door panel 34, the right front door panel 35 and the left side door panel 36 are opened, the travel switch 37 is triggered to control the first circuit breaker 12 to disconnect, that is, when the first circuit breaker 12 is not disconnected and the left front door panel 34, the right front door panel 35 and the left side door panel 36 are opened, the first circuit breaker 12 can be automatically disconnected in time to ensure the personal safety of maintenance personnel.
[0044] Preferably, as Figure 4 shown, a cooling fan 38 is provided in the upper part of the left rear cavity 19 in the cabinet body 10. The cooling fan 38 can cool the second circuit breaker 20 to prevent the second circuit breaker 20 from being damaged due to excessive temperature during operation.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A switchgear cabinet, characterized in that, Including: A cabinet body with a cabinet door, a first circuit breaker, an earthing switch, a transformer arranged in the cabinet body, and a mechanical interlocking device respectively connecting the earthing switch and the cabinet door. The inner cavity of the cabinet body is divided into a left front cavity, a right front cavity, a right rear cavity and a left rear cavity. The earthing switch is fixed in the middle of the left front cavity, the transformer is fixed at the lower part of the right front cavity, the first circuit breaker is fixed at the upper part of the right front cavity. The earthing switch is connected to the input end of the transformer, and the transformer is connected in series with the first circuit breaker.
2. The switch cabinet according to claim 1, characterized in that: A second circuit breaker is arranged at the upper part of the left front cavity in the cabinet body, an outlet is arranged at the position of the second circuit breaker of the cabinet body, a pre-charge resistor is arranged at the outlet outside the cabinet body, the second circuit breaker and the pre-charge resistor are connected in parallel, and the output end of the first circuit breaker is electrically connected to the input ends of the second circuit breaker and the pre-charge resistor respectively.
3. The switchgear according to claim 2, characterized in that: A voltage transformer for measuring the voltage of the transformer is arranged at the lower part of the left rear cavity in the cabinet body.
4. The switch cabinet according to claim 3, characterized in that: A current transformer for measuring the current of the transformer is arranged at the upper part of the right rear cavity in the cabinet body.
5. A switchgear cabinet according to claim 4, characterized in that: A heat exchange component is arranged in the middle of the right front cavity in the cabinet body.
6. The switch cabinet according to claim 5, wherein: A first partition board with a first ventilation opening is arranged behind the heat exchange component in the cabinet body, a second partition board for isolating the earthing switch is arranged on the left side of the heat exchange component of the cabinet body, a third partition board is arranged behind the transformer, a second ventilation opening is arranged at the lower part of the third partition board, and a third ventilation opening is arranged behind the first circuit breaker.
7. A switchgear cabinet according to claim 6, characterized in that: A fourth partition board is arranged at the corresponding position of the voltage transformer at the lower part of the left front cavity in the cabinet body.
8. A switchgear cabinet according to claim 7, characterized in that: Busbars are arranged at the upper middle parts of the left rear cavity and the right rear cavity in the cabinet body.
9. A switch cabinet according to claim 8, characterized in that: The cabinet door includes a left front door panel, a right front door panel and a left side door panel. The mechanical interlocking device is arranged at the corresponding position of the earthing switch on the left front door panel, and travel switches for controlling the on-off of the first circuit breaker are arranged at the upper ends of the left front door panel, the right front door panel and the left side door panel of the cabinet body.
10. A switch cabinet according to claim 9, characterized in that: A cooling fan is arranged at the upper part of the left rear cavity in the cabinet body.