A switchgear cabinet

Abstract

This invention provides a switchgear, including a cabinet with a busbar chamber. Three-phase incoming bushings and three-phase voltage transformers are installed inside the cabinet. Busbars are connected to the incoming bushings within the busbar chamber, and stationary busbar contacts are connected to the busbars. Transformer stationary contacts are connected to the voltage transformers. Grounding stationary contacts are fixedly installed within the busbar chamber, and three moving contact modules are movably installed. An operation input mechanism is installed on the side wall of the cabinet, and the operation input mechanism is connected to the moving contact modules via a transmission structure. A three-position switch corresponding to each phase incoming bushing is provided within the busbar chamber. Each three-position switch has an operating end that is driven to the moving contact of the three-position switch. The operating end protrudes from the outside of the cabinet. The operation input mechanism and the operating end are located on the same side wall of the cabinet. This design addresses the problem of excessively large switchgear size and inconvenient operation caused by separate voltage transformer isolation chambers and busbar isolation chambers in traditional switchgear.

Description

Technical Field

[0001] This invention relates to a switch cabinet, belonging to the technical field of gas-insulated switchgear. Background Technology

[0002] Cabinet-type gas-insulated metal-enclosed switchgear (C-GIS) is a high-tech product that integrates intelligent control, protection, monitoring, measurement, and communication. It features small size, light weight, high safety, high reliability, and adaptability to harsh environments, and is widely used in the field of high-voltage transmission and distribution.

[0003] Voltage transformers are a crucial component of C-GIS (Chemical Gas Insulation System), primarily functioning to detect bus voltage, power, and energy to monitor equipment operation. They also protect valuable structural components in case of line faults, minimizing economic losses. Therefore, timely maintenance, inspection, and repair to ensure their proper functioning are paramount. Currently, in cabinet-type gas-insulated metal-enclosed switchgear (C-GIS), the bus chamber and voltage transformer are connected without isolation devices. When a voltage transformer malfunctions and requires repair or routine maintenance, the main circuit must be disconnected for the safety of maintenance personnel, resulting in a power outage across the entire circuit. This disrupts the operation of the entire voltage transmission and distribution system, causing significant economic losses.

[0004] Chinese utility model patent CN208316171U, published on January 1, 2019, discloses a busbar isolation chamber assembly and power distribution equipment. The busbar isolation chamber assembly comprises a voltage transformer isolation chamber and a busbar isolation chamber. This assembly allows the voltage transformers within the isolation chamber to establish a reliable insulation gap during maintenance without disconnecting the main line, ensuring the normal operation of the voltage transmission and distribution system. However, the separate design of the voltage transformer isolation chamber and the busbar isolation chamber significantly increases the equipment's size. Furthermore, the first transmission input connector for controlling the grounding and closing of the voltage transformers and the second transmission input connector for controlling the opening and closing of the main line are located on different side walls of the busbar isolation chamber assembly, making operation cumbersome, affecting work efficiency, and limiting equipment layout. Summary of the Invention

[0005] The purpose of this invention is to provide a switchgear that solves the problems of excessive size and inconvenient operation caused by the separate installation of the voltage transformer isolation chamber and the busbar isolation chamber in the switchgear.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A switchgear includes a cabinet with a busbar chamber inside. Three-phase incoming bushings and three-phase voltage transformers are installed inside the cabinet. A busbar is connected to one end of the incoming bushing inside the busbar chamber, and a busbar stationary contact is connected to the busbar. A transformer stationary contact is connected to one end of the voltage transformer inside the busbar chamber. A grounding stationary contact is fixedly installed inside the busbar chamber, and three moving contact modules are movably installed. Each moving contact module has a working position (connecting the corresponding transformer stationary contact with the busbar stationary contact and disconnecting the corresponding transformer stationary contact with the grounding stationary contact) and an isolation position (connecting the corresponding transformer stationary contact with the grounding stationary contact and disconnecting the corresponding transformer stationary contact with the busbar stationary contact) within its travel stroke. An operation input mechanism operable from the outside is installed on the side wall of the cabinet. The operation input mechanism is connected to the moving contact modules via a transmission structure, enabling the moving contact modules to switch between the working position and the isolation position. The busbar chamber is equipped with a three-position switch corresponding to each phase incoming bushing and voltage transformer. The three-position switch has an operating end that is driven to the moving contact of the three-position switch. The operating end is installed on the side wall of the cabinet and protrudes from the outside of the cabinet. The operation input mechanism and the operating end are located on the same side wall of the cabinet.

[0008] The beneficial effects of the above technical solution are as follows: the working positions of the current transformer stationary contact and the busbar stationary contact, and the corresponding current transformer stationary contact and the grounding stationary contact, as well as the isolation positions of the corresponding current transformer stationary contact and the grounding stationary contact, and the corresponding current transformer stationary contact and the busbar stationary contact, are integrated together inside the busbar cavity and located within the stroke of the moving contact module. This maximizes the use of the space inside the busbar cavity, achieving the effect of reducing the size of the switchgear. At the same time, the operation input mechanism and the operation terminal are located on the same cavity wall, which makes the operation of the switchgear more convenient, improves work efficiency, and also makes the layout of the switchgear more flexible and convenient.

[0009] Furthermore, three voltage transformers are arranged side by side in the front-to-back direction of the busbar chamber. The incoming bushings correspond to the corresponding voltage transformers in the left-to-right direction. The three incoming bushings are staggered left and right in the front-to-back direction. The three three-position switches correspond to the corresponding incoming bushings in the up-down direction. The busbar is L-shaped, with the horizontal part connected to the incoming bushings and the vertical part connected to the three-position switches. The stationary contacts of the busbar are connected to the vertical part and correspond to the stationary contacts of the transformers in the left-to-right direction.

[0010] The beneficial effects of the above technical solution are as follows: it makes the internal components of the switch cabinet more regular, maximizes the use of the internal space of the busbar chamber, and sets the busbar stationary contacts in the vertical part of the busbar, which correspond to the stationary contacts of the current transformer in the left and right direction, making the conduction between the busbar stationary contacts and the current transformer stationary contacts more convenient. The moving contact group has a simple structure, which is convenient for processing and improves economic efficiency.

[0011] Furthermore, the grounding stationary contact and the corresponding current transformer stationary contact are positioned vertically. The busbar stationary contact, current transformer stationary contact, and grounding stationary contact are arranged in a triangle. The moving contact module is rotatably installed in the busbar cavity. The transmission structure drives the moving contact module to rotate to achieve switching between the two workstations.

[0012] The beneficial effects of the above technical solution are as follows: it makes reasonable use of the limited installation space in the busbar cavity, and concentrates the busbar stationary contact, transformer stationary contact and grounding stationary contact in the right-angled triangular area, thereby making the wiring and equipment installation in the busbar cavity more regular, without increasing the size of the equipment, saving manufacturing costs, and having good economic benefits.

[0013] Furthermore, the operation input mechanism is located on the upper side of the operation end, and the transmission structure is a four-bar linkage extending to the left and right. The operation input mechanism is installed on the left cavity wall and is a reversing transmission structure.

[0014] The beneficial effects of the above technical solution are as follows: Firstly, the four-bar linkage structure is simple and easy to process, reducing manufacturing costs; secondly, the operation input mechanism is a reversing transmission structure, ensuring that the operation input mechanism and the operation end are located on the same side wall of the busbar chamber, further making the switchgear layout more flexible and operation more convenient. Overall, it is both convenient to use and improves economic efficiency.

[0015] Furthermore, the output end of the four-bar linkage is connected to a rotating spindle, and the three moving contact modules are all mounted on the rotating spindle and are driven by the rotating spindle to move synchronously.

[0016] The advantages of the above technical solution are as follows: Arranging the three moving contact modules side-by-side on the main shaft makes efficient use of the internal space within the busbar chamber, while reducing the number of transmission mechanisms, further minimizing the size of the switchgear. Simultaneously, the four-bar linkage drives the three moving contact modules to rotate together, enabling switching between the working and isolating positions, making operation simpler and more convenient. This ensures that maintenance of the voltage transformer does not affect the normal operation of the power transmission system, while also improving economic efficiency.

[0017] Furthermore, the moving contact module includes a rotating connecting plate connected to the transmission structure. Two moving contacts arranged opposite each other are movably mounted on the rotating connecting plate. A clamping elastic element is installed on the rotating connecting plate to provide elastic force to the moving contacts to ensure that they are pressed tightly against the corresponding stationary contacts.

[0018] The beneficial effects of the above technical solution are as follows: by rotating the connecting plate, the moving contact can rotate and connect with the corresponding stationary contact. At the same time, under the elastic force of the clamping elastic element, the moving contact and the corresponding stationary contact are always tightly connected, thereby ensuring the stability of the circuit between the moving contact and the corresponding stationary contact and improving the reliability of the switch cabinet.

[0019] Furthermore, the moving contact is rotatably mounted on the rotating connecting plate, and each of the three stationary contacts has a contact section. The three contact sections are arranged in parallel, and the contact surface of the contact section of the current transformer stationary contact faces the moving contact module. The two moving contacts are strip structures and are on the same straight line. The clamping elastic element is a torsion spring.

[0020] The beneficial effects of the above technical solution are as follows: Firstly, the torsion spring has the characteristics of high elasticity and strong reset capability; secondly, each of the three stationary contacts has a contact section, and the three contact sections are arranged in parallel. The contact surface of the contact section of the current transformer's stationary contact faces the moving contact module, ensuring that when the moving contact contacts the corresponding stationary contact, the direction of the elastic force is towards the contact surface of the stationary contact. These two aspects work together to keep the moving contact and the corresponding stationary contact in close contact at all times, ensuring the stability of the circuit and improving the reliability of the switchgear. At the same time, the torsion spring is convenient to process, has mature manufacturing technology, and is readily available, which helps to save costs and improve economic efficiency.

[0021] Furthermore, the moving contact is connected to the rotating connecting plate by a compression spring. Each of the three stationary contacts has a contact section, and the three contact sections are arranged in parallel. The contact surface of the contact section of the current transformer stationary contact faces the moving contact module. The two compression springs are on the same straight line, and the two moving contacts are respectively connected to the opposite ends of the two compression springs so that when they come into contact with the corresponding stationary contacts, they are pressed together by the bending deformation of the compression springs and the compression deformation in the axial direction.

[0022] The beneficial effects of the above technical solution are as follows: the compression spring is easy to process, has a mature manufacturing process, and is readily available, which helps to save costs and improve economic efficiency. The moving contact is connected to the rotating connecting plate via the compression spring, which reduces the difficulty of positioning the stationary contact. By directly adjusting the length of the compression spring, the distance between the two moving contacts can be matched with the distance between the corresponding stationary contacts, further reducing production costs and improving economic efficiency. Simultaneously, each of the three stationary contacts has a contact section, arranged in parallel. The contact surface of the current transformer stationary contact section faces the moving contact module, ensuring that when the moving contact contacts the corresponding stationary contact, the bending deformation of the compression spring and the elastic force generated by the axial compression deformation always face the contact surface of the stationary contact. This keeps the moving contact and the corresponding stationary contact in close contact at all times, ensuring circuit stability and improving the reliability of the switchgear.

[0023] Furthermore, the moving contact module includes a rotating connecting plate and two moving contacts movably mounted on the rotating connecting plate. The two moving contacts respectively contact the two corresponding stationary contacts. The rotating connecting plate is equipped with a clamping elastic element that provides elastic force to the two moving contacts to ensure that the moving contacts are pressed tightly against the corresponding stationary contacts. Alternatively, the moving contacts can be spring-type moving contacts.

[0024] The beneficial effects of the above technical solution are as follows: by using the elastic force of the clamping elastic element or the spring-type moving contact, the moving contact and the corresponding stationary contact are kept tightly connected at all times, which ensures the stability of the circuit and improves the reliability of the switch cabinet. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the moving contact module in the working position in Embodiment 1 of the switchgear of the present invention;

[0026] Figure 2 This is a schematic diagram of the moving contact module in the isolation position in Embodiment 1 of the switchgear of the present invention;

[0027] Figure 3 This is a schematic diagram of the moving contact module in Embodiment 1 of the switchgear of the present invention;

[0028] Figure 4 These are schematic diagrams of the operation input structure in Embodiments 1 and 2 of the switchgear of the present invention;

[0029] Figure 5 This is a schematic diagram of the bevel gear meshing end structure of the bevel gear set in the operation input structure of Embodiment 1 and Embodiment 2 of the switch cabinet in this invention;

[0030] Figure 6 This is a schematic diagram of the moving contact module in the working position in Embodiment 2 of the switchgear of the present invention;

[0031] Figure 7 This is a schematic diagram of the moving contact module in the isolation position in Embodiment 2 of the switchgear of the present invention;

[0032] Figure 8 This is a schematic diagram of the moving contact module in Embodiment 2 of the switchgear of the present invention.

[0033] In the diagram: 1. Cabinet; 2. Busbar chamber; 3. Busbar; 4. Incoming bushing; 5. Voltage transformer; 6. Mounting bracket; 7. Three-position switch; 8. Three-position switch operating terminal; 9. Busbar bar; 10. Busbar stationary contact; 11. Voltage transformer stationary contact; 12. Grounding stationary contact; 13. Moving contact module; 14. Bevel gear set fixing component; 15. Input shaft; 16. Output shaft; 17. Drive crank; 18. Transmission. 19. Driven crank; 20. Bevel gear box; 131. Moving blade; 132. Torsion spring; 133. Rotary connecting plate; 134. Fixing block; 135. Moving blade bolt; 136. Stop pin; 137. Fixed fulcrum; 138. Spring moving contact; 139. Compression spring; 140. Fixed flat washer; 141. Spring moving contact bolt; 142. Spring fixing plate; 143. Equalizing block; 144. Wire. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0038] Embodiment 1 of the switch cabinet in this invention:

[0039] Example 1 of the switchgear, such as Figure 1-5As shown, the device includes a cabinet 1, which contains a busbar chamber 2. Three-phase incoming bushings 4 and corresponding three-phase voltage transformers 5 are installed on the walls of the busbar chamber 2. One end of the incoming bushing 4, located inside the busbar chamber 2, is connected to a busbar busbar 9. One end of the voltage transformer 5 extends into the busbar chamber 2. A stationary busbar contact 10 is connected to the busbar busbar 9. A stationary transformer contact 11 is connected to the end of the voltage transformer 5 extending into the busbar chamber 2. A stationary grounding contact 12 is installed inside the busbar chamber 2 on a three-phase grounding device corresponding to the three-phase incoming bushing 4. A moving contact module 13 is also movably installed inside the busbar chamber 2. There are three modules 13, each corresponding to a three-phase incoming bushing 4. Within its travel stroke, the moving contact module 13 has a working position that connects the current transformer stationary contact 11 and the busbar stationary contact 10, and disconnects the current transformer stationary contact 11 and the grounding stationary contact 12, as well as an isolation position that connects the current transformer stationary contact 11 and the grounding stationary contact 12, and disconnects the current transformer stationary contact 11 and the busbar stationary contact 10. An operation input mechanism that can be operated from the outside is installed on the cavity wall of the busbar chamber 2. The operation input mechanism is connected to the moving contact module 13 through a four-bar linkage. When power is input through the operation input mechanism, the moving contact module 13 can switch between the working position and the isolation position.

[0040] The incoming bushings 4 and voltage transformers 5 are installed on the upper cavity wall of the busbar chamber 2. Three voltage transformers 5 are arranged side-by-side on the right side of the busbar chamber 2 in a front-to-back direction. The three incoming bushings 4 correspond to their respective voltage transformers 5 in a left-to-right direction, and are staggered left and right in a front-to-back direction. Three three-position switches 7 are installed inside the busbar chamber 2, corresponding to each phase incoming bushing 4 and voltage transformer 5. Each three-position switch 7 has a three-position switch operating terminal 8 that is drivenly connected to the moving contact of the three-position switch. The three-position switch operating terminal 8 is installed on the cavity wall of the busbar chamber 2 away from the end facing the voltage transformer 5 and protrudes from one side of the cavity wall. Three L-shaped busbars 9 are included, with the horizontal portion connected to their respective incoming bushings 4 and the vertical portion connected to their respective three-position switches 7.

[0041] The operating input mechanism is a steering transmission structure composed of a bevel gear set. The bevel gear set includes a bevel gear set fixing member 14, an input shaft 15, an output shaft 16, and a bevel gear box 20. The bevel gear set fixing member 14 includes a horizontally arranged U-shaped plate and a base plate located on one side of the longitudinal bottom of the U-shaped plate. The bevel gear set is fixed to the inner wall of the cabinet 1 by the bevel gear set fixing member 14. The bevel gear ends of the input shaft 15 and the output shaft 16 are located inside the bevel gear box 20 and mesh with each other to achieve steering force transmission. The bevel gear box 20 is fixed to the base plate of the bevel gear set fixing member 14. The shaft end of the input shaft 15 passes through the bevel gear box 20, the bevel gear set fixing member 14, and the cabinet 1, extending outside the cabinet 1 and located on the same side of the cabinet 1 as the three-phase switch operating terminal 8. The shaft end of the output shaft 16 passes through the bevel gear box 20 and the bevel gear set fixing member 14 and is connected to the transmission four-bar linkage. The transmission four-bar linkage includes an active crank 17, a transmission rod 18, and a driven crank 19. The active crank 17 and the driven crank 19 are respectively installed at both ends of the transmission rod 18. The active crank 17 is connected to the rotating shaft end of the output shaft 16. The rotating main shaft of the driven crank 19 passes through the fixed bracket 6 and is connected to three moving contact modules 13. This simplifies the internal structure of the switch cabinet, facilitates operation, and allows multiple moving contact modules 13 to switch between the working position and the isolation position simultaneously using a single operation input mechanism and the transmission four-bar linkage.

[0042] The system includes three busbar stationary contacts 10, three transformer stationary contacts 11, and three grounding stationary contacts 12. The busbar stationary contacts 10 are connected to the vertical sections of their respective busbar rows 9. The transformer stationary contacts 11 correspond to their respective busbar stationary contacts 10 in the left-right direction, and the grounding stationary contacts 12 correspond to their respective transformer stationary contacts 11 in the up-down direction. Ultimately, the busbar stationary contacts 10, transformer stationary contacts 11, and grounding stationary contacts 12 are arranged in a right-angled triangle. The busbar stationary contact 10, the transformer stationary contact 11, and the grounding stationary contact 12 each have a contact section. The three contact sections are arranged in parallel. The contact surface of the transformer stationary contact section faces the moving contact module 13. The contact sections of the busbar stationary contact 10, the transformer stationary contact 11, and the grounding stationary contact 12 intersect or coincide with the tangent of a circular area with the rotating main shaft of the driven crank 19 as the center and the distance from the rotating main shaft of the driven crank 19 to the end of the moving contact as the radius. This ensures that the moving contact on the moving contact module 13 can make contact with the corresponding stationary contact.

[0043] The moving contact module 13 includes a rotating connecting plate 133, a moving blade 131, a torsion spring 132, and a fixing block 134. The rotating connecting plate 133 is triangular, and one end of it is connected to the rotating shaft of the driven crank 19 to enable the moving contact module 13 to rotate with the transmission four-bar linkage. Each of the other two ends of the rotating connecting plate 133 has a hole. The moving blade bolt 135 passes through the moving blade 131 and the rotating connecting plate 133 and is screwed into the corresponding screw hole in the fixing block 134. The two moving blades 131 are respectively installed at both ends of the rotating connecting plate 133, and the moving blades 131 can rotate bidirectionally with the moving blade bolt 135 as the center. Two torsion springs 132 are included, each sleeved on one of the two moving blade bolts 135 and located between the moving blade 131 and the rotating connecting plate 133. The rotating connecting plate 133 has a fixed support point 137 at each end of the movable blade 131. The movable blade 131 is also equipped with a stop pin 136 that can rotate with the movable blade 131. One end of the torsion spring 132 is attached to the stop pin 136, and the other end is attached to the fixed support point 137. In this way, when the transmission four-link drives the movable contact module 13 to rotate and switch between two work positions, the movable blade 131 will always keep in close contact with the corresponding stationary contact under the action of the reset force.

[0044] Embodiment 2 of the switch cabinet in this invention:

[0045] Example 2 of the switchgear, such as Figure 4-8 As shown, the difference between Embodiment 2 and Embodiment 1 is that the moving contact module 13 includes a connecting plate 133, a spring moving contact 138, a compression spring 139, a spring fixing plate 142, and a pressure equalizing block 143. The rotating connecting plate 133 is an isosceles trapezoidal plate, and its shorter base end is connected to the rotating main shaft of the driven crank 19 to realize that the moving contact module 13 rotates with the transmission four-link. A compression spring 139 is installed at each end of the spring fixing plate 142. The two compression springs 139 extend in opposite directions and are on the same straight line. A fixing flat washer 140 is installed at the end of the compression spring 139 away from the spring fixing plate 142. The spring moving contact bolt 141 passes through the fixing flat washer 140 to fix the spring moving contact 138 to the compression spring 139. The two spring moving contacts 138 at both ends are connected by a wire 144 passing through the compression spring 139 and the spring fixing plate 142. The spring fixing plate 142 is fixed to one end of the longer bottom edge of the rotating connecting plate 133 by the pressure equalizing block 143. Thus, when the rotating connecting plate 133 rotates and drives the two spring moving contacts 138 to move, the contact surfaces are kept pressed together by the bending deformation of the compression spring 139 and its axial compression deformation when the two spring moving contacts 138 contact the corresponding stationary contacts. Of course, this also reduces the positioning difficulty of the busbar stationary contact 10, the transformer stationary contact 11, and the grounding stationary contact 12. By adjusting the length of the compression spring 139, the two spring moving contacts 138 are adapted to the corresponding stationary contacts to ensure proper fit.

[0046] Embodiment 3 of the switch cabinet in this invention:

[0047] The difference between Example 3 and Example 1 is that the busbar stationary contact, transformer stationary contact, and grounding stationary contact are arranged on the same horizontal plane from left to right. In this case, the moving contact module has a plate-like structure, including a sliding plate, moving contacts, and compression springs. The sliding plate is horizontally mounted on a guide rail. A push-pull rod is connected to the left end of the sliding plate and extends out of the switch cabinet. Two compression springs are fixed to the sides of the sliding plate facing the stationary contacts, and are secured to the sliding plate at their ends. Two moving contacts are installed on the ends of the compression springs away from the sliding plate, and the distance between the two moving contacts is equal to the distance between the busbar stationary contact and the transformer stationary contact, and between the transformer stationary contact and the grounding stationary contact. The moving contact module slides horizontally along the guide rail, enabling switching between two positions, and the compression springs ensure a tight fit between the moving contact and the opposing stationary contact. No other adjustments are required.

[0048] Embodiment 4 of the switch cabinet in this invention:

[0049] The difference between Example 4 and Example 1 is that the three voltage transformers are arranged side-by-side on the right side of the busbar chamber in a front-to-back direction, and the three incoming bushings correspond to their respective voltage transformers in a left-to-right direction, and are also arranged side-by-side in a front-to-back direction. The busbars corresponding to the incoming bushings inside the busbar chamber are U-shaped, with the horizontal section connecting to the incoming bushings, the vertical section on the left connecting to the three-position switch, and the vertical section on the right connecting to the busbar stationary contact. No other adjustments are required.

[0050] Embodiment 5 of the switch cabinet in this invention:

[0051] The difference between Example 5 and Example 1 is that the operation input mechanism is a push-pull rod, and the transmission structure is a transmission rod mounted on a horizontal guide rail, with a rack on the upper part of the transmission rod. The moving contact module is mounted on the rotating main shaft, and the end of the rotating main shaft passes through a fixed bracket and has a gear that meshes with the rack of the transmission rod. During operation, the push-pull rod drives the transmission rod to move, which in turn causes the gear to drive the moving contact module on the rotating main shaft to rotate. In this case, a reversing transmission structure is not required to ensure that the operation input mechanism and the operating end are on the same side wall of the cabinet. No other adjustments are needed.

[0052] Embodiment 6 of the switch cabinet in this invention:

[0053] The difference between Example 6 and Example 1 is that the moving contacts at both ends of the rotating connecting plate are bidirectional rotating blades. A cam is provided at one end of the moving blade fixed to the rotating connecting disk, and the cam is located on the side opposite to the contact surface between the moving blade and the corresponding stationary contact. An elastic sheet is provided on the rotating connecting disk, and the elastic sheet is in contact with the cam. When the moving blade is in contact with the corresponding stationary contact, the elastic sheet deforms and applies an elastic force to the cam, keeping the moving blade and the corresponding stationary contact tightly pressed together.

[0054] Embodiment 7 of the switch cabinet in this invention:

[0055] The difference between Example 7 and Example 1 is that the moving contacts at both ends of the rotating connecting plate are spring-type moving contacts. When the end of the spring-type moving contact is in contact with the corresponding stationary contact, it can generate an elastic force facing the corresponding stationary contact, ensuring that it is in close contact with the corresponding stationary contact.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A switch cabinet, comprising a cabinet body, characterized in that: The cabinet contains a busbar chamber, which houses three-phase incoming bushings and three-phase voltage transformers. A busbar is connected to one end of the incoming bushing within the busbar chamber, and a stationary busbar contact is connected to the busbar. A stationary transformer contact is connected to one end of the voltage transformer within the busbar chamber. A grounding stationary contact is fixedly installed within the busbar chamber, and three moving contact modules are movably installed. Each moving contact module has a working position within its travel stroke that connects the corresponding transformer stationary contact to the busbar stationary contact and disconnects the corresponding transformer stationary contact from the grounding stationary contact; and a working position that connects the corresponding transformer stationary contact to the grounding stationary contact and disconnects the corresponding transformer stationary contact from the busbar stationary contact. The isolated position of the busbar stationary contact is equipped with an operation input mechanism that can be operated from the outside, which is installed on the side wall of the cabinet. The operation input mechanism is connected to the moving contact module through a transmission structure, thereby enabling the moving contact module to switch between the working position and the isolated position. A three-position switch corresponding to each phase incoming bushing and voltage transformer is set in the busbar chamber. The three-position switch has an operating end that is driven to the moving contact of the three-position switch. The operating end is installed on the side wall of the cabinet and protrudes from the outside of the cabinet. The operation input mechanism and the operating end are located on the same side wall of the cabinet. The moving contact module includes a rotating connecting plate and two moving contacts that are movably installed on the rotating connecting plate.

2. The switchgear according to claim 1, characterized in that: Three voltage transformers are arranged side by side in the front-to-back direction of the busbar chamber. The incoming bushings correspond to the corresponding voltage transformers in the left-to-right direction. The three incoming bushings are staggered left and right in the front-to-back direction. The three three-position switches correspond to the corresponding incoming bushings in the up-down direction. The busbar is L-shaped, with the horizontal part connected to the incoming bushings and the vertical part connected to the three-position switches. The stationary contacts of the busbar are connected to the vertical part and correspond to the stationary contacts of the transformers in the left-to-right direction.

3. The switchgear according to claim 2, characterized in that: The grounding stationary contact and the corresponding current transformer stationary contact are positioned vertically. The busbar stationary contact, current transformer stationary contact, and grounding stationary contact are arranged in a triangle. The moving contact module is rotatably installed in the busbar cavity. The transmission structure drives the moving contact module to rotate to achieve switching between the two workstations.

4. The switchgear according to claim 3, characterized in that: The operation input mechanism is located on the upper side of the operation end, and the transmission structure is a four-bar linkage extending to the left and right. The operation input mechanism is installed on the left cavity wall and is a reversing transmission structure.

5. The switchgear according to claim 4, characterized in that: The output end of the four-bar linkage is connected to a rotating main shaft, and the three moving contact modules are all mounted on the rotating main shaft and are driven by the rotating main shaft to move synchronously.

6. The switchgear according to any one of claims 3-5, characterized in that: The moving contact module includes a rotating connecting plate connected to the transmission structure. Two moving contacts are movably mounted on the rotating connecting plate and arranged opposite to each other. A clamping elastic element is installed on the rotating connecting plate to provide elastic force to the moving contacts to ensure that they are pressed tightly against the corresponding stationary contacts.

7. The switchgear according to claim 6, characterized in that: The moving contact is rotatably mounted on the rotating connecting plate. Each of the three stationary contacts has a contact section, and the three contact sections are arranged in parallel. The contact surface of the contact section of the current transformer stationary contact faces the moving contact module. The two moving contacts are strip structures and are on the same straight line. The clamping elastic element is a torsion spring.

8. The switchgear according to claim 6, characterized in that: The moving contact is connected to the rotating connecting plate by a compression spring. Each of the three stationary contacts has a contact section, and the three contact sections are arranged in parallel. The contact surface of the contact section of the current transformer stationary contact faces the moving contact module. The two compression springs are on the same straight line, and the two moving contacts are respectively connected to the opposite ends of the two compression springs so that when they come into contact with the corresponding stationary contact, they are pressed together by the bending deformation of the compression spring and the compression deformation in the axial direction.

9. The switchgear according to claim 1, characterized in that: Two moving contacts are in contact with two corresponding stationary contacts respectively. A clamping elastic element is installed on the rotating connecting plate to provide elastic force to the two moving contacts to ensure that the moving contacts are pressed tightly against the corresponding stationary contacts, or the moving contacts are spring-type moving contacts.

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