Switch cabinet

Abstract

The invention belongs to the technical field of power distribution switch equipment, and particularly relates to a switch cabinet. According to the switch cabinet provided by the invention, the main bus assembly, the isolation static contact component, the three-position switch, the vacuum arc-extinguishing chamber component and the insulation pull rod are respectively arranged on the bracket, so that the integration level of the internal structure of the switch cabinet is improved; the main bus assembly, the isolation static contact component, the three-position switch, the vacuum arc extinguish chamber component and the insulation pull rod can be conveniently installed in the cabinet shell along with the support, the installation technology of the switch cabinet is simplified, and production and manufacturing of products are facilitated. In addition, the cable buses are arranged on the left and right sides of the cabinet shell, so that the height dimension space of the cabinet shell is well saved.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution switch equipment, and in particular relates to a switch cabinet. Background Art

[0002] In the distribution switchgear, the circuit breaker switch, the isolating switch and the grounding switch are required to cooperate to realize the control of the circuit. In the conventional distribution switchgear, the three are independent structures and non-integrated designs. For example, the circuit breaker switches VS1, VD4, ZN28; the isolating switch GN19; the grounding switch JN15, etc. are all independent individuals. The traditional switchgear puts together the three-position switches (circuit breaker switch, isolating switch, grounding switch) of multiple functional switches through the design of the shell to realize the functions and performance of the overall distribution switchgear. The above-mentioned circuit breaker switch adopts a trolley structure and uses epoxy resin solid insulation to achieve the insulation performance of the switchgear. Once the insulation is damaged, it will be a permanent accident and the insulation cannot be restored. The advantage of the switchgear that uses multiple functional units together is that the replaceable components are easier to find during maintenance, but its external dimensions are large and require a large installation space.

[0003] The three-position switch is a switch element that integrates the functions of an isolating switch and a grounding switch. It has a closing position, an opening position, and a grounding position. The three-position switch integrates the functions of both the isolating switch and the grounding switch, and is completed by a switch knife, so that mechanical interlocking can be achieved to prevent the main circuit from closing the grounding knife when it is energized. In addition to the above functions, the application of the three-position switch in the distribution switch equipment can also effectively reduce the external dimensions of the distribution switch equipment. However, the existing distribution switch equipment using the three-position switch still has the problems of low integration, large installation space, complex structure, and more consumables. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of low integration and large space occupation of existing distribution switch equipment, and to provide a switch cabinet that integrates three-position switches, vacuum arc chamber components and main busbar components on a bracket for easy production and manufacturing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A switch cabinet, comprising a cabinet shell, a conductive component and a three-position switch, wherein the switch room is provided with a three-position switch; the cabinet shell is provided with a switch room and a cable room arranged from top to bottom; the conductive component is arranged in the switch room, comprising a bracket and a main busbar component, an isolating static contact component, a vacuum arc extinguishing chamber component and an insulating pull rod arranged on the bracket from top to bottom, a busbar cable passing area is formed between the two side walls of the cabinet shell and the bracket, the isolating static contact component is connected to the lower end of the main busbar component, the vacuum arc extinguishing chamber component is arranged on the upper side of the insulating pull rod, a cable bus is arranged in the busbar cable passing area, one end of the cable bus is connected to the cable bushing of the cable room, the other end of the cable bus is connected to the moving contact part at the lower end of the vacuum arc extinguishing chamber component through a soft connector, the fixed contact part at the upper end of the vacuum arc extinguishing chamber component is connected to the three-position switch, and when the insulating pull rod is driven, it is used to push the moving contact part at the lower end of the vacuum arc extinguishing chamber component to achieve electrical connection with the fixed contact part, so that the cable bus can achieve electrical connection with the main busbar component through the vacuum arc extinguishing chamber component and the three-position switch;

[0007] The three-position switch comprises a gate mechanism movably arranged between the isolating static contact component and the vacuum arc extinguishing chamber component, which is used to control the connection or disconnection of the cable bushing with the isolating static contact component through the vacuum arc extinguishing chamber component, and to control the connection or disconnection of the cable bushing with the grounding circuit through the vacuum arc extinguishing chamber component.

[0008] Compared with the prior art, the switch cabinet of the present invention improves the integration of the internal structure of the switch cabinet by installing the main busbar assembly, the isolating static contact component, the three-position switch, the vacuum arc chamber component and the insulating pull rod on the bracket respectively, so that the main busbar assembly, the isolating static contact component, the three-position switch, the vacuum arc chamber component and the insulating pull rod can be installed in the cabinet shell together with the bracket, which simplifies the installation process of the switch cabinet and facilitates product manufacturing. In addition, the cable busbar is arranged on the left and right sides of the cabinet shell, which well saves the cabinet shell height dimension space.

[0009] Furthermore, the bracket includes a bottom mounting beam located at the bottom, a top positioning frame located at the top, and insulating isolation frames located on both sides, the two insulating isolation frames are respectively connected to the top positioning frame and the two sides of the bottom mounting beam, and the insulating isolation frames are provided with heat dissipation holes arranged along the vertical direction; through such an arrangement, the bracket has a better heat dissipation function and avoids high-temperature operation of internal electrical components.

[0010] Furthermore, the bottom mounting beam is made of metal material, and the bracket also includes insulating plates located on both sides, which are respectively connected to the relatively outer sides of the two insulating isolation frames and are arranged between the cable bus and the bottom mounting beam, and the outer side of the cable bus is covered with an insulating heat shrink tube; through such an arrangement, by arranging an insulating plate between the cable bus and the bottom mounting beam, it is better to avoid dangerous factors such as electric arc between the two, thereby ensuring the safety of product use.

[0011] Furthermore, a plug-in slot with an inner opening is provided at the lower end of the insulating isolation frame, and the two sides of the bottom mounting beam are respectively limitedly installed in the corresponding plug-in slots, and the insulating isolation frame and the bottom mounting beam are fixed by screws; through such an arrangement, the installation connection between the insulating isolation frame and the bottom mounting beam is more stable, the insulation performance requirements are met, and the product has good reliability.

[0012] Furthermore, the main busbar assembly is arranged on the upper side of the top positioning frame, and also includes a top mounting beam, which is connected to the main busbar assembly through an insulating support member, and the bracket is connected to the front wall plate and the rear wall plate of the switch room through the top mounting beam to fix the conductive assembly, and the bottom mounting beam extends longitudinally out of the front and rear sides of the insulating isolation frame, and the front and rear sides of the bottom mounting beam are respectively connected to the front wall plate and the rear wall plate of the switch room to support the conductive assembly; through such an arrangement, the assembly connection between the bracket and the cabinet shell is firm, and the product structure is stable.

[0013] Furthermore, the main busbar assembly includes a main busbar component and side expansion sleeves connected on both sides of the main busbar component, the isolating static contact component is arranged at the bottom of the top positioning frame, the main busbar component is arranged at the top of the top positioning frame and is electrically connected to the upper end of the isolating static contact component, the main busbar component extends to both sides respectively, and the two side expansion sleeves are respectively connected to the two side wall panels of the switch room, the side expansion sleeve is Z-shaped, the upper end of the side expansion sleeve is connected to the outer end of the main busbar component, and the lower end of the main busbar component passes through the side wall panel of the switch room to form a busbar power connection expansion port; through such an arrangement, the Z-shaped main busbar component can keep the busbar power connection expansion port at the outer end of the expanded busbar at a specified height, thereby improving the versatility of the switch cabinet, and in order to meet the height requirements of the standardized side expansion sleeves of the normal pressure sealed switch cabinet, the height of the cabinet shell is further saved.

[0014] Furthermore, the bracket also includes a bottom support member arranged on the upper side of the bottom mounting beam, the lower part of the vacuum arc chamber component is supported on the upper side of the bottom support member, the insulating pull rod is arranged on the bottom mounting beam through a transmission structure, one side of the bottom support member extends out of the bus cable passing area through an insulating isolation frame, and the other end of the cable bus is connected to the outer side of the bottom support member to fix the connection with the flexible connector, and also includes a circuit breaker operating mechanism, the circuit breaker operating mechanism is used to drive the insulating pull rod to move relative to each other through the transmission structure, so that the moving contact part of the vacuum arc chamber component is closed or opened through the conductive rod and the fixed contact part, so as to realize the circuit connection between the vacuum arc chamber component and the cable bus; through such a configuration, the connection and disconnection of the cable bus and the vacuum arc chamber component are controlled by the circuit breaker operating mechanism, the operation method is simple, and the effect of controlling the connection and disconnection of the cable bus is good.

[0015] Furthermore, the transmission structure includes a main shaft rotatably connected to the bottom mounting beam and a crank arm connected to the main shaft, the outer end of the crank arm is rotatably connected to the insulating pull rod, and the circuit breaker operating mechanism is used to drive the main shaft to rotate relative to each other; through such an arrangement, the transmission structure is simply arranged and convenient for production and manufacturing.

[0016] Furthermore, the gate mechanism includes a moving contact component and a three-position operating mechanism, one end of the moving contact component is elastically hinged to the upper end of the vacuum arc chamber component through a disc spring assembly, and the other end of the moving contact component is a moving contact. The three-position operating mechanism is used to drive the moving contact component to swing relative to each other so that the moving contact of the moving contact component and the isolating static contact component are closed, thereby conducting the electrical connection between the main busbar assembly and the cable sheathing, or the moving contact and the isolating static contact component are opened, thereby disconnecting the electrical connection between the main busbar assembly and the cable sheathing; through such an arrangement, the gate mechanism has a simple structure and a good effect of controlling the on and off of the main busbar assembly and the cable sheathing.

[0017] Furthermore, the side wall plate of the switch room is provided with a grounding circuit component connected to the grounding circuit, the isolating static contact component is provided with an isolating static contact, and the grounding circuit component is provided with a three-phase grounding static contact. The three positions of the three-position switch respectively correspond to the closing position in which the moving contact contacts the isolating static contact, the isolation position in which the moving contact is suspended between the three-phase grounding static contact and the isolating static contact, and the grounding position in which the moving contact contacts the three-phase grounding static contact.

[0018] Furthermore, a moving blade buffer is provided on the side of the isolating static contact component away from the moving contact, and when the moving contact follows the moving contact component and is closed in place relative to the isolating static contact component, the moving contact buffer stops on the moving blade buffer, and an electric field control component is provided at the lower end of the isolating static contact component; a grounding buffer is provided on the side of the grounding loop component away from the moving contact component, and when the moving contact follows the moving contact component and is closed in place relative to the grounding loop component, the moving contact buffer stops on the grounding buffer; through such an arrangement, the relative excessive movement of the moving contact component is effectively limited, and the limiting buffer effect of the moving contact component is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the switch cabinet.

[0020] Figure 2 A schematic diagram of a conductive component.

[0021] Figure 3 Is an isometric view of a conductive component.

[0022] Figure 4 Schematic diagram of the insulating isolation frame.

[0023] Description of reference numerals: cabinet 1, conductive component 2, three-position switch 3, switch room 4, cable room 5, bracket 6, isolating static contact component 22, vacuum interrupter component 23, insulating pull rod 24, busbar cable passing area 25, bottom mounting beam 61, top positioning frame 62, insulating isolation frame 63, heat dissipation hole 631, insulating plate 64, plug-in card slot 632, top mounting beam 65, side expansion bushing 211, main busbar component 212, bottom support member 66, moving contact support member 67, cable bus 24 1. Main shaft 242, crank arm 243, isolating static contact 31, isolating station 32, grounding loop component 33, moving knife buffer 28, grounding buffer 29, first lateral connecting frame 26, second lateral connecting frame 27, moving contact component 34, operating shaft 35, insulating connecting rod 36, pin 81, socket 82, plug-in part 83, pin hole 84, insulating baffle 88, insulating support component 60, soft connector 245, cable sleeve 51, moving contact part 231, fixed contact part 232, support beam 213. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] See also Figures 1 to 4The switch cabinet of the present invention comprises a cabinet shell 1, a conductive component 2, and a three-position switch 3; the cabinet shell 1 is provided with a switch room 4 and a cable room 5 arranged from top to bottom, and the switch room 4 is provided with a three-position switch 3; the conductive component 2 is arranged in the switch room 4, and comprises a bracket 6 and a main busbar assembly, an isolating static contact component 22, a vacuum arc chamber component 23 and an insulating pull rod 24 arranged on the bracket 6 from top to bottom, a busbar cable passing area 25 is formed between the two inner side walls of the cabinet shell 1 and the bracket 6, the isolating static contact component 22 is connected to the lower end of the main busbar assembly, the vacuum arc chamber component 23 is arranged on the upper side of the insulating pull rod 24, and a cable bus 241 connected to the cable bushing 51 of the cable room 5 is arranged in the busbar cable passing area 25, one end of the cable bus 241 is connected to the cable bushing 51 of the cable room 5, and the cable bus 24 The other end is connected to the moving contact part 231 at the lower end of the vacuum interrupter component 23 through the soft connector 245, and the fixed contact part 232 at the upper end of the vacuum interrupter component 23 is connected to the three-position switch 3. When the insulating pull rod 24 is driven, it is used to push the moving contact part 231 at the lower end of the vacuum interrupter component 23 to achieve electrical connection with the fixed contact part 232, so that the cable bus 241 can be electrically connected to the main bus assembly through the vacuum interrupter component 23 and the three-position switch 3; the three-position switch 3 includes a gate mechanism movably arranged between the isolation static contact component 22 and the vacuum interrupter component 23, which is used to control the connection or disconnection of the cable bushing 51 with the isolation static contact component 22 through the vacuum interrupter component 2, and to control the connection or disconnection of the cable bushing 51 with the grounding circuit through the vacuum interrupter component 23.

[0026] Compared with the prior art, the switch cabinet of the present invention improves the integration of the internal structure of the switch cabinet by installing the three-position switch 3, the main busbar assembly, the isolating static contact component 22, the vacuum arc chamber component 23 and the insulating pull rod 24 on the bracket 6 respectively, so that the main busbar assembly, the isolating static contact component 22, the three-position switch 3, the vacuum arc chamber component 23 and the insulating pull rod 24 can be installed in the cabinet shell 1 together with the bracket 6, simplifying the installation process of the switch cabinet and facilitating product manufacturing. In addition, the cable bus 241 is arranged on the left and right sides of the cabinet shell 1, which well saves the height dimension space of the cabinet shell 1.

[0027] In one embodiment, insulating materials are respectively provided on the outer sides of the cable busbar 241 and the cable bushing 51 . For example, an insulating tube is provided on the outer side of the cable busbar 241 , and an insulating cap is provided on the outer side of the cable bushing 51 .

[0028] See also Figures 1 to 3In one embodiment, the bracket 6 includes a bottom mounting beam 61 located at the bottom, a top positioning frame 62 located at the top, and insulating isolation frames 63 located at both sides. The two insulating isolation frames 63 are respectively connected to the top positioning frame 62 and the two sides of the bottom mounting beam 61, so that the bracket 6 forms a frame structure. The insulating isolation frame 63 is provided with a plurality of heat dissipation holes 631 arranged along the vertical direction. Through such an arrangement, the bracket 6 has a better heat dissipation function to avoid high temperature operation of the internal electrical components.

[0029] See also Figures 1 to 4 In one embodiment, the bottom mounting beam 61 is made of metal material, and the bottom mounting beam 61 is preferably made of iron material, which has the characteristics of high strength and hardness. The bracket 6 also includes insulating plates 64 located on both sides, and the height of the insulating plates 64 is 1.2 to 3 times the height of the bottom mounting beam 61. The insulating plates 64 are respectively connected to the relative outer sides of the two insulating isolation frames 63 and are arranged between the cable bus 241 and the bottom mounting beam 61. The outer side of the cable bus 241 is covered with an insulating heat shrink tube; through such a configuration, by arranging the insulating plate 64 between the cable bus 241 and the bottom mounting beam 61, it is better to avoid dangerous factors such as arcing between the two, thereby ensuring the safety of product use.

[0030] See also Figures 1 to 3 In one embodiment, the lower end of the insulating isolation frame 63 is provided with an inner opening plug-in slot 632, and the two sides of the bottom mounting beam 61 are respectively limited and installed in the corresponding plug-in slots 632, and the insulating isolation frame 63 and the bottom mounting beam 61 are further fixed by screw connection; through such an arrangement, the installation connection between the insulating isolation frame 63 and the bottom mounting beam 61 is more stable, the insulation performance requirements are met, and the product has good reliability.

[0031] See also Figures 1 to 4 In one embodiment, the main busbar assembly is arranged on the upper side of the top positioning frame 62, and also includes a top mounting beam 65. The lower side of the top mounting beam 65 is connected to the upper side of the main busbar assembly through an insulating support member 60. The bracket 6 is connected to the front wall plate and the rear wall plate of the switch room 4 through the top mounting beam 65 to fix the conductive component 2. The top mounting beam 65 is connected to the top wall plate of the switch room 4 by screws. The bottom mounting beam 61 extends longitudinally out of the front and rear sides of the insulating isolation frame 63. The front and rear sides of the bottom mounting beam 61 are respectively connected to the front wall plate and the rear wall plate of the switch room 4 by screws to support the conductive component 2. Through such an arrangement, the assembly connection between the bracket 6 and the cabinet shell 1 is firm, and the product structure is stable.

[0032] See also Figures 1 to 4In one embodiment, the conductive components 2 and the three-position switches 3 are provided in three groups respectively, and the three groups of conductive components 2 and the three-position switches 3 are installed in the cabinet shell 1 along the longitudinal direction. The three groups of conductive components 2 share the same bottom mounting beam 61 and top mounting beam 65, and adjacent brackets 6 are separated by insulating baffles 88.

[0033] See also Figures 1 to 4 In one embodiment, the main busbar assembly includes a main busbar component 212 and side expansion sleeves 211 connected to both sides of the main busbar component 212, the isolating static contact component 22 is arranged at the bottom of the top positioning frame 62, the main busbar component 212 is arranged at the top of the top positioning frame 62 and is electrically connected to the upper end of the isolating static contact component 22, the main busbar component 212 extends to both sides respectively, the outer ends of the two side expansion sleeves 211 are respectively connected to the two side wall panels of the switch room 4, the side expansion sleeve 211 is Z-shaped, and the upper end of the side expansion sleeve 211 is connected to the outer end of the main busbar component 212 The lower end of the main busbar component 212 penetrates the side wall plate of the switch room 4 to form a busbar power extension port; through such an arrangement, the main busbar component 212 is in a Z-shape, so that the busbar power extension port at the outer end of the expanded busbar can be maintained at a specified height, thereby improving the versatility of the switch cabinet, and also in order to meet the height requirements of the standardized side expansion sleeve 211 of the normal pressure sealed switch cabinet. At the same time, the side expansion sleeve 211 is in a "Z" shape, and the cable busbar outside the cabinet shell is connected to the corresponding side expansion sleeve 211 from both sides, respectively, to meet the standardized height requirements of the cable sleeve 51 and the side expansion sleeve outside the cabinet shell, and further save the height of the cabinet shell 1.

[0034] In one embodiment, the left wall plate and the right wall plate of the switch room 4 are respectively provided with support beams 213 on the upper and lower sides of the side expansion sleeve 211, so that the side expansion sleeve 211 has better supporting force when connecting external cables.

[0035] See also Figures 1 to 4In one embodiment, the bracket 6 also includes a bottom support member 66 arranged on the upper side of the bottom mounting beam 61, the lower part of the vacuum interrupter component 23 is supported on the upper side of the bottom support member 66, one side of the bottom support member 6 extends out of the bus cable passing area 25 through the insulating isolation frame 63, the other end of the cable bus 241 is connected to the outer side of the bottom support member 6 to fix the connection with the soft connector 245, the insulating pull rod 24 is arranged on the bottom mounting beam 61 through a transmission structure, and also includes a circuit breaker operating mechanism. Mechanism (not shown), the circuit breaker operating mechanism is used to drive the insulating pull rod 24 to move relative to each other through the transmission structure, so that the cable bus 241 drives the conductive rod in the vacuum arc chamber component 23 to close or open through the soft connector 245, so as to realize the circuit connection and disconnection between the vacuum arc chamber component 23 and the cable bus 241; through such an arrangement, the circuit breaker operating mechanism controls the closing and disconnecting actions of the cable bus 241 and the vacuum arc chamber component 23, the operation method is simple, and the on-off effect of controlling the cable bus 241 is good.

[0036] See also Figure 1 In one embodiment, the transmission structure includes a main shaft 242 rotatably connected to the bottom mounting beam 61 and a crank arm 243 connected to the main shaft 242, the outer end of the crank arm 243 is rotatably connected to the bottom of the insulating pull rod 24, and the circuit breaker operating mechanism is used to drive the main shaft 242 to rotate relative to each other through forward and reverse directions, and further drive the insulating pull rod 24 to move up and down through the crank arm 243; through such an arrangement, the transmission structure is simple to set up and convenient for production and manufacturing. The circuit breaker operating mechanism can adopt an existing mechanical device for driving the main shaft 242 to rotate relative to each other.

[0037] See also Figures 1 to 3 In one embodiment, the gate mechanism includes a moving contact member 34 and a three-position operating mechanism (not shown in the figure), one end of the moving contact member 34 is elastically hinged to the fixed contact portion 232 at the upper end of the vacuum arc extinguishing chamber member 23 through a disc spring assembly, and the other end of the moving contact member 34 is a moving contact. The three-position operating mechanism is used to drive the moving contact member 34 to swing relative to each other so that the moving contact of the moving contact member 34 and the isolating static contact member 22 are closed, thereby conducting the electrical connection between the main busbar assembly and the cable sheath 51, or the moving contact and the isolating static contact member 22 are opened, thereby disconnecting the electrical connection between the main busbar assembly and the cable sheath 51; through such an arrangement, the gate mechanism has a simple structure and a good effect of controlling the on-off effect of the main busbar assembly and the cable sheath 51.

[0038] See also Figure 1In one embodiment, the bracket 6 also includes a moving contact support member 67 arranged on the upper side of the bottom support member 66, the upper end of the vacuum arc chamber member 23 is connected to the moving contact support member 67 and passes through the upper side of the moving contact support member 67, and the lower end of the moving contact member 34 is rotatably connected to the upper end of the vacuum arc chamber member 23.

[0039] See also Figures 1 to 4 In one embodiment, the side wall plate of the switch room 4 is provided with a grounding circuit component 33 connected to the grounding circuit, the end of the isolating static contact component 22 is provided with an isolating static contact 31, the grounding circuit component 33 is provided with a three-phase grounding static contact, and the three positions of the three-position switch 3 respectively correspond to the closing position where the moving contact contacts the isolating static contact 31, the isolating position 32 where the moving contact is suspended between the three-phase grounding static contact and the isolating static contact 31, and the grounding position where the moving contact contacts the three-phase grounding static contact.

[0040] See also Figure 1 In one embodiment, a moving blade buffer 28 is provided on the side of the isolating static contact member 22 away from the moving contact, and when the moving contact follows the moving contact member 34 to close in place relative to the isolating static contact member 22, the moving contact buffer stops on the moving blade buffer 28, and an electric field control member (not shown) is provided at the lower end of the isolating static contact member 22; a grounding buffer 29 is provided on the side of the grounding loop member 33 away from the moving contact, and when the moving contact follows the moving contact member 34 to close in place relative to the grounding loop member 33, the moving contact buffer stops on the grounding buffer 29, and the moving blade buffer 28 and the grounding buffer 29 are made of insulating material, preferably silicone material; through such an arrangement, the relative excessive movement of the moving contact member 34 is effectively limited, and the limiting buffer effect of the moving contact member 34 is good.

[0041] See also Figures 1 to 4 In one embodiment, it also includes a first lateral connecting frame 26 and a second lateral connecting frame 27. The two sides of the bracket 6 are connected to the two side wall panels of the cabinet shell 1 through the first lateral connecting frame 26 and the second lateral connecting frame 27 respectively. The three-position operating mechanism includes a driving device, an operating shaft 35 and an insulating connecting rod 36. The operating shaft 35 is arranged on the first lateral connecting frame 26. The two ends of the insulating connecting rod 36 are respectively connected to the operating shaft 35 and the moving contact member 34. The driving device can adopt an existing mechanical device for driving the main shaft 242 to rotate relative to each other. The grounding loop member 33 is arranged on the top of the second lateral connecting frame 27 so that when the moving contact member 34 and the grounding loop member 33 are closed, the grounding loop member 33 has better supporting force.

[0042] See also Figures 1 to 4In one embodiment, the top positioning frame 62, the moving contact support member 67 and the bottom support member 66 are respectively connected to the insulating isolation frame 63 through a mortise and tenon structure, and the mortise and tenon structure includes a pin 81, a socket 82 provided on the insulating isolation frame 63, and a plug-in portion 83 provided on both sides of the positioning plate. The plug-in portion 83 is provided with a pin hole 84 arranged vertically. After the plug-in portion 83 is inserted into the corresponding socket 82, the top positioning plate, the moving contact support member 67 and the bottom support member 66 are respectively fixedly connected with the insulating isolation frame 63 through the pin 81 and the pin hole 84. The insulating isolation frame 63, the pin 81, the top positioning frame 62, the moving contact support member 67 and the bottom support member 66 are respectively made of insulating materials.

[0043] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A switch cabinet, characterized in that: include: The cabinet shell is equipped with a switch room and a cable room arranged from top to bottom, and a three-position switch is installed in the switch room; A conductive component is arranged in the switch room, including a bracket and a main busbar assembly, an isolating static contact component, a vacuum arc chamber component and an insulating pull rod arranged on the bracket from top to bottom. A busbar cable passing area is formed between the two side walls of the cabinet and the bracket. The isolating static contact component is connected to the lower end of the main busbar assembly. The vacuum arc chamber component is arranged on the upper side of the insulating pull rod. A cable bus is arranged in the busbar cable passing area. One end of the cable bus is connected to the cable bushing of the cable room, and the other end of the cable bus is connected to the moving contact part at the lower end of the vacuum arc chamber component through a soft connector. The fixed contact part at the upper end of the vacuum arc chamber component is connected to the three-position switch. When the insulating pull rod is driven, it is used to push the moving contact part and the fixed contact part at the lower end of the vacuum arc chamber component to achieve electrical connection, so that the cable bus can achieve electrical connection with the main busbar assembly through the vacuum arc chamber component and the three-position switch; The three-position switch comprises a gate mechanism movably arranged between the isolating static contact component and the vacuum arc extinguishing chamber component, which is used to control the connection or disconnection of the cable bushing with the isolating static contact component through the vacuum arc extinguishing chamber component, and to control the connection or disconnection of the cable bushing with the grounding circuit through the vacuum arc extinguishing chamber component.

2. The switch cabinet according to claim 1, characterized in that: The bracket comprises a bottom mounting beam at the bottom, a top positioning frame at the top and insulating isolation frames at both sides, and the two insulating isolation frames are respectively connected to both sides of the top positioning frame and the bottom mounting beam.

3. The switch cabinet according to claim 2, characterized in that: The bottom mounting beam is made of metal material, and the bracket also includes insulating plates located on both sides. The insulating plates are respectively connected to the opposite outer sides of the two insulating isolation frames and are arranged between the cable bus and the bottom mounting beam. An insulating heat shrink tube is sheathed on the outer side of the cable bus.

4. The switch cabinet according to claim 3, characterized in that: The lower end of the insulating isolation frame is provided with a plug-in card slot with an inner opening, and the two sides of the bottom mounting beam are respectively limitedly mounted in the corresponding plug-in card slots.

5. The switch cabinet according to claim 2, characterized in that: The main busbar assembly is arranged on the upper side of the top positioning frame and also includes a top mounting beam, which is connected to the main busbar assembly through an insulating support member, and the bracket is connected to the front wall plate and the rear wall plate of the switch room through the top mounting beam to fix the conductive assembly, and the bottom mounting beam extends longitudinally out of the front and rear sides of the insulating isolation frame, and the front and rear sides of the bottom mounting beam are respectively connected to the front wall plate and the rear wall plate of the switch room to support the conductive assembly.

6. The switch cabinet according to any one of claims 2 to 5, characterized in that: The main busbar assembly includes side expansion sleeves and main busbar components on both sides, the isolating static contact component is arranged at the bottom of the top positioning frame, the main busbar is arranged at the top of the top positioning frame and is electrically connected to the upper end of the isolating static contact, the main busbar components extend to both sides respectively, the side expansion sleeves are respectively connected to the two side wall panels of the switch room, the side expansion sleeve is Z-shaped, the upper end of the side expansion sleeve is connected to the outer end of the main busbar component, and the lower end of the side expansion sleeve passes through the side wall panel of the switch room to form a busbar power expansion port.

7. The switch cabinet according to claim 2 or 3, characterized in that: The bracket also includes a bottom support member arranged on the upper side of the bottom mounting beam, the lower part of the vacuum arc chamber component is supported on the upper side of the bottom support member, the insulating pull rod is arranged on the bottom mounting beam through a transmission structure, one side of the bottom support member extends out of the bus cable passing area through an insulating isolation frame, the other end of the cable bus is connected to the outer side of the bottom support member to fix the connection with the soft connector, and also includes a circuit breaker operating mechanism, the circuit breaker operating mechanism is used to drive the insulating pull rod to move relative to each other through the transmission structure, so that the moving contact part of the vacuum arc chamber component is closed or opened through the conductive rod and the fixed contact part, so as to realize the circuit connection between the vacuum arc chamber component and the cable bus.

8. The switch cabinet according to claim 7, characterized in that: The transmission structure comprises a main shaft rotatably connected to the bottom mounting beam and a crank arm connected to the main shaft, the outer end of the crank arm is rotatably connected to the insulating pull rod, and the circuit breaker operating mechanism is used to drive the main shaft to rotate relatively.

9. The switch cabinet according to claim 1, characterized in that: The gate mechanism includes a moving contact component and a three-position operating mechanism. One end of the moving contact component is elastically hinged to the upper end of the vacuum interrupter component through a disc spring assembly. The other end of the moving contact component is a moving contact. The three-position operating mechanism is used to drive the moving contact component to swing relative to each other so that the moving contact of the moving contact component and the isolating static contact component are closed, thereby conducting the electrical connection between the main busbar assembly and the cable sheath, or the moving contact and the isolating static contact component are opened, thereby disconnecting the electrical connection between the main busbar assembly and the cable sheath.

10. The switch cabinet according to claim 9, characterized in that: The switch room side wall plate is provided with a grounding circuit component connected to the grounding circuit, the isolating static contact component is provided with an isolating static contact, the grounding circuit component is provided with a three-phase grounding static contact, and the three positions of the three-position switch respectively correspond to a closing position where the moving contact contacts the isolating static contact, an isolating position where the moving contact is suspended between the three-phase grounding static contact and the isolating static contact, and a grounding position where the moving contact contacts the three-phase grounding static contact; A moving blade buffer is provided on the side of the isolating static contact component away from the moving contact. When the moving contact is closed relative to the isolating static contact component with the moving contact component, the moving contact buffer stops on the moving blade buffer. An electric field control component is provided at the lower end of the isolating static contact component. A grounding buffer is provided on one side of the grounding loop component away from the moving contact. When the moving contact is closed relative to the grounding loop component, the moving contact is buffered and stopped on the grounding buffer.

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