Environment-friendly horizontal PT switch

Abstract

This utility model relates to the field of PT switches, and mainly discloses an environmentally friendly horizontal PT switch, including two parallel fixed plates, a first connecting beam, a connecting plate, an insulator, a copper busbar, a copper rod, an isolation shaft assembly, a second connecting beam, and a first stationary contact. A rotating plate is mounted on one of the fixed plates, and an automatic disconnection assembly is installed on the side wall of the fixed plate near the adjustment shaft. This utility model optimizes the structure of the PT switch, enabling quick power disconnection during subsequent maintenance and repair. It also provides leakage protection through a grounding wire, providing a safe environment for the switch cabinet. Furthermore, during normal use of the switch cabinet, it can automatically adjust the thermal actuator and the isolation shaft assembly according to the temperature inside the switch cabinet to achieve disconnection, thus improving safety performance to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of PT switches, specifically to an environmentally friendly horizontal PT switch. Background Technology

[0002] Isolation PT cabinets (environmentally friendly gas-insulated ring main units) are generally directly connected to the main busbar to detect the busbar voltage and provide real-time protection. They typically contain the main busbar, isolating blades, connecting PT copper busbars, surge arresters, fuses, insulators, etc.

[0003] PT switches are an important component of PT cabinets. Currently, commonly used vacuum load switches on the market have complex structures, are bulky, and are difficult to install. In addition, PT cabinets contain numerous electrical components, and prolonged operation can cause the internal temperature of the cabinet to rise, posing a fire risk, especially in hot weather. In the event of a fire, disconnecting the switch can only be done manually, which is extremely dangerous.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] The purpose of this invention is to provide an environmentally friendly horizontal PT switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An environmentally friendly horizontal PT switch includes two parallel fixed plates, which are fixedly connected at one end by a first connecting beam. A connecting plate is mounted on the end face of the first connecting beam facing the middle of the fixed plates. An insulator is mounted on the connecting plate, and a copper busbar is mounted on the end of the insulator. A copper rod is connected to the end of the copper busbar. An isolation shaft assembly is also installed between the two fixed plates. A rotating plate is mounted on one of the fixed plates, and an adjusting shaft is rotatably mounted on the other fixed plate, facing the rotating plate. The two ends of the isolation shaft assembly are respectively connected to the rotating plate and the adjusting shaft. The two fixed plates are also fixedly connected by a second connecting beam, and a first stationary contact is fixedly mounted on the second connecting beam. An automatic disconnection assembly is installed on the side wall of the fixed plate near the adjusting shaft, and the automatic disconnection assembly is connected to the adjusting shaft.

[0008] With the above technical solution, under normal conditions, the isolation shaft assembly connects the copper rod to the first stationary contact, thereby enabling power supply inside the switch cabinet. When maintenance is required inside the cabinet, the isolation shaft assembly is rotated, thereby disconnecting the isolation shaft assembly from the first stationary contact and de-energizing the cabinet. The automatic disconnection component can operate automatically in emergency situations, rotating the adjustment shaft to achieve automatic disconnection.

[0009] Furthermore, an extension frame is fixedly installed on the side wall of the first connecting beam along its length direction, and a grounding bar is fixedly installed on one end face of the extension frame facing the isolation shaft assembly. A second stationary contact is fixedly installed on the grounding bar, and a stabilizing beam is connected between the two fixed plates.

[0010] Through the above technical solution, the grounding busbar can be connected to the grounding wire of the switch cabinet, and when the isolation shaft assembly rotates, it can contact the second stationary contact, thereby avoiding leakage of the cabinet and improving safety performance.

[0011] Furthermore, the isolation shaft assembly includes several insulated shafts arranged in a coaxial manner. An insulating plate is integrally formed in the middle of the outer wall of each insulated shaft. A notch is also formed in the middle of the outer wall of each insulated shaft. A through hole is formed inside the insulating plate, and the through hole is connected to the notch. A moving contact is fixedly installed inside the through hole at the end of the insulating plate away from the notch. The moving contact is connected to a corresponding copper rod through an electric wire.

[0012] With the above technical solution, when the isolation shaft assembly rotates through the adjusting shaft, the insulating shaft will drive the insulating plate to flip, and the moving contact at the end of the insulating plate will move synchronously. When the moving contact is in contact with the first stationary contact, it is in an energized state. When it is necessary to de-energize, the insulating shaft will rotate to separate the moving contact from the first stationary contact and make contact with the second stationary contact.

[0013] Furthermore, the automatic disconnection component includes a horizontal bar plate fixedly installed on a fixed plate. A vertical frame is integrally provided at the top center of the horizontal bar plate. An assembly shaft is rotatably installed on the vertical frame. One end of the assembly shaft is connected to an adjustment shaft. A gear is also fixedly installed on the assembly shaft. A sliding groove is provided on the horizontal bar plate along its length direction. A rack is slidably installed in the sliding groove, and the rack meshes with the gear.

[0014] Through the above technical solution, by manipulating the rack to slide in the slide groove, the rack will drive the gear to rotate, and the rotation of the gear will drive the adjustment shaft to rotate through the assembly shaft, thereby realizing the rotation adjustment of the isolation shaft assembly.

[0015] Furthermore, the crossbar is provided with a strip-shaped hole along its length, which is connected to a sliding groove. A retaining groove is provided at the bottom of one end of the rack. An assembly frame is provided below the crossbar, which is fixedly installed on the side wall of the fixed plate. A thermal actuator is installed on the assembly frame, and a telescopic rod extends from one end of the thermal actuator. A connecting frame is fixedly installed at the end of the telescopic rod, and a push rod is fixedly installed at the end of the connecting frame away from the telescopic rod. The top of the push rod passes through the strip-shaped hole.

[0016] The above technical solution enables the thermal actuator to operate when heated, thereby adjusting the position of the telescopic rod. When the temperature reaches a critical value, the telescopic rod will drive the connecting frame and push rod to move. The top of the push rod will move in the slot, and the end of the push rod will contact the stop groove and push the rack to move, thereby adjusting the rotation of the gear.

[0017] Furthermore, a stop lever is also fixedly installed on the fixed plate, and when the push rod moves to the stop lever position, the moving contact contacts the second stationary contact.

[0018] Through the above technical solution, the set stop bar can be used as a protection mechanism to limit the maximum movement distance of the push bar, ensuring that when the stop bar push bar moves to the maximum position, the moving contact can just contact the second stationary contact, so as to realize the grounding operation of the moving contact.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a simple and reasonable structure, and the structure of the PT switch has been optimized, which can facilitate quick power disconnection during subsequent maintenance and repair. It can also provide leakage protection through the grounding wire, providing a safe environment for the switch cabinet. In addition, during normal use of the switch cabinet, it can automatically adjust the thermal actuator according to the temperature inside the switch cabinet. When the temperature exceeds the critical value, it can automatically adjust the isolation shaft assembly to realize the disconnection operation, which improves the safety performance to a certain extent. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the first connecting beam in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the second connecting beam in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0024] Figure 4 This is an assembly diagram of the isolation shaft assembly in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0025] Figure 5This is a structural schematic diagram of the isolation shaft assembly in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the fixing plate in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the structure of an automatic disconnection component in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the bottom structure of the horizontal bar plate in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model;

[0029] Figure 9 This is a schematic diagram of the outer wall structure of the fixing plate in an environmentally friendly horizontal PT switch according to an embodiment of the present utility model.

[0030] Figure label:

[0031] 1. Fixed plate; 2. First connecting beam; 3. Connecting plate; 4. Insulator; 5. Copper busbar; 6. Copper rod; 7. Isolation shaft assembly; 71. Insulating shaft; 72. Insulating plate; 73. Notch; 74. Through hole; 75. Moving contact; 8. Rotating plate; 9. Adjusting shaft; 10. Stabilizing beam; 11. Automatic disconnection assembly; 12. Second connecting beam; 13. First stationary contact; 14. Extension frame; 15. Grounding busbar; 16. Second stationary contact; 17. Horizontal bar; 18. Vertical frame; 19. Assembly shaft; 20. Gear; 21. Slide groove; 22. Rack; 23. Strip hole; 24. Stop groove; 25. Assembly frame; 26. Thermal actuator; 27. Telescopic rod; 28. Connecting frame; 29. ​​Push rod; 30. Stop bar. Detailed Implementation

[0032] The utility model will now be further described with reference to the accompanying drawings and specific embodiments:

[0033] Please see Figure 1-6An environmentally friendly horizontal PT switch according to an embodiment of the present invention includes two parallel fixed plates 1. One end of the two fixed plates 1 is fixedly connected by a first connecting beam 2. A connecting plate 3 is fixedly installed on the end face of the first connecting beam 2 facing the middle of the fixed plate 1, and an insulator 4 is fixedly installed on the end face of the connecting plate 3 away from the first connecting beam 2. A copper busbar 5 is installed on the end of the insulator 4 away from the connecting plate 3, and a copper rod 6 is connected to the end of the copper busbar 5. An isolation shaft assembly 7 is also installed between the two fixed plates 1. A rotating plate 8 is installed on one fixed plate 1, and an adjusting shaft 9 is rotatably installed on the other fixed plate 1 facing the rotating plate 8. The two ends of the isolation shaft assembly 7 are respectively connected to the rotating plate 8 and the adjusting shaft 9. The end of the two fixed plates 1 away from the first connecting beam 2 is also fixedly connected by a second connecting beam 12, and a first stationary contact 13 is fixedly installed on the second connecting beam 12. An automatic disconnection assembly 11 is installed on the side wall of the fixed plate 1 near the adjusting shaft 9, and the automatic disconnection assembly 11 is connected to the adjusting shaft 9.

[0034] Under normal conditions, the isolation shaft assembly 7 connects the copper rod 6 to the first stationary contact 13, thereby energizing the switch cabinet. When maintenance is required inside the cabinet, the isolation shaft assembly 7 is rotated, thereby disconnecting the isolation shaft assembly 7 from the first stationary contact 13 and de-energizing the cabinet. The automatic disconnection component 11 can operate automatically in an emergency to rotate the adjustment shaft 9, thereby achieving automatic disconnection.

[0035] A stabilizing beam 10 is also connected between the two fixed plates 1, which can further increase the stability between the two fixed plates 1.

[0036] An extension frame 14, extending along the length of the first connecting beam 2, is fixedly installed on the side wall of the extension frame 14. A grounding busbar 15 is fixedly installed on one end of the extension frame 14 facing the isolation shaft assembly 7, and a second stationary contact 16 is fixedly installed on the grounding busbar 15. The grounding busbar 15 can be connected to the grounding wire of the switch cabinet, and when the isolation shaft assembly 7 rotates, it can contact the second stationary contact 16, thereby preventing leakage current in the cabinet and improving safety performance.

[0037] The isolation shaft assembly 7 includes multiple collinearly arranged insulating shafts 71. An insulating plate 72 is integrally formed on the middle of the outer wall of each insulating shaft 71. A notch 73 is also formed on the middle of the outer wall of each insulating shaft 71, away from the insulating plate 72. A through hole 74 is formed inside the insulating plate 72 along its length, and the through hole 74 is connected to the notch 73. A movable contact 75 is fixedly installed inside the through hole 74 at the end of the insulating plate 72 away from the notch 73. The movable contact 75 is connected to a corresponding copper rod 6 via an electric wire. When the isolation shaft assembly 7 is rotated by the adjusting shaft 9, the insulating shaft 71 will drive the insulating plate 72 to flip, and the movable contact 75 at the end of the insulating plate 72 will move synchronously. When the movable contact 75 is in contact with the first stationary contact 13, it is in an energized state. When it is necessary to de-energize, the insulating shaft 71 will be rotated to separate the movable contact 75 from the first stationary contact 13 and make contact with the second stationary contact 16.

[0038] Please see Figure 7-9 The automatic disconnection assembly 11 includes a horizontal bar 17 fixedly mounted on a fixed plate 1. A support frame 18 is integrally formed at the top center of the horizontal bar 17. An assembly shaft 19 is rotatably mounted on the support frame 18. One end of the assembly shaft 19 is connected to an adjusting shaft 9. A gear 20 is also fixedly mounted on the assembly shaft 19. A slide groove 21 is formed on the horizontal bar 17 along its length. A rack 22 is slidably mounted in the slide groove 21, and the rack 22 meshes with the gear 20. By manipulating the rack 22 to slide in the slide groove 21, the rack 22 will drive the gear 20 to rotate. The rotation of the gear 20 will drive the adjusting shaft 9 to rotate through the assembly shaft 19, thereby realizing the rotation adjustment of the isolation shaft assembly 7.

[0039] The horizontal bar 17 is also provided with a strip-shaped hole 23 along its length direction. The strip-shaped hole 23 is connected to the slide groove 21. A stop groove 24 is provided at the bottom of one end of the rack 22. An assembly frame 25 is also provided below the horizontal bar 17. The assembly frame 25 is fixedly installed on the side wall of the fixed plate 1. A thermal actuator 26 is installed on the assembly frame 25. A telescopic rod 27 extends from one end of the thermal actuator 26. A connecting frame 28 is fixedly installed at the end of the telescopic rod 27. A push rod 29 is fixedly installed at the end of the connecting frame 28 away from the telescopic rod 27. The top of the push rod 29 is provided through the strip-shaped hole 23. When the thermal actuator 26 is heated, it will work to adjust the position of the telescopic rod 27. When the heating reaches the critical value, the telescopic rod 27 will drive the connecting frame 28 and the push rod 29 to move. The top of the push rod 29 will move in the slot 23, and the end of the push rod 29 will contact the stop groove 24 and push the rack 22 to move, thereby adjusting the rotation of the gear 20.

[0040] A stop bar 30 is also fixedly installed on the fixed plate 1. The stop bar 30 can block the push rod 29 when the telescopic rod 27 moves. When the push rod 29 moves to the stop bar 30 position, the moving contact 75 contacts the second stationary contact 16, and the moving contact 75 can be automatically connected to the grounding wire.

[0041] Through the above-described solution of this utility model, the structure of this utility model is simple and reasonable, and the structure of the PT switch has been optimized. It can facilitate quick power disconnection during subsequent maintenance and repair, and can also provide leakage protection through the grounding wire, providing a safe environment for the switch cabinet. In addition, during normal use of the switch cabinet, it can automatically adjust the thermal actuator 26 according to the temperature inside the switch cabinet. When the temperature exceeds the critical value, it can automatically adjust the isolation shaft assembly 7 to realize the disconnection operation, which improves the safety performance to a certain extent.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "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 process, method, article, or apparatus.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly horizontal PT switch comprising two fixed plates (1) arranged in parallel to each other, characterized in that, Two fixed plates (1) are fixedly connected at one end by a first connecting beam (2). A connecting plate (3) is installed on one end face of the first connecting beam (2) facing the middle of the fixed plate (1). An insulator (4) is installed on the connecting plate (3). A copper busbar (5) is installed at the end of the insulator (4). A copper rod (6) is connected to the end of the copper busbar (5). An isolation shaft assembly (7) is also installed between the two fixed plates (1). A rotating plate (8) is installed on one of the fixed plates (1), and the other fixed plate... An adjusting shaft (9) is rotatably mounted on the plate (1) and is positioned opposite the rotating plate (8). The two ends of the isolation shaft assembly (7) are connected to the rotating plate (8) and the adjusting shaft (9) respectively. The two fixed plates (1) are also fixedly connected by a second connecting beam (12), and a first stationary contact (13) is fixedly mounted on the second connecting beam (12). An automatic disconnection assembly (11) is installed on the side wall of the fixed plate (1) near the adjusting shaft (9), and the automatic disconnection assembly (11) is connected to the adjusting shaft (9).

2. The environmentally friendly horizontal PT switch according to claim 1, characterized in that, An extension frame (14) is fixedly installed on the side wall of the first connecting beam (2) along its length direction. A grounding bar (15) is fixedly installed on one end face of the extension frame (14) facing the isolation shaft assembly (7). A second stationary contact (16) is fixedly installed on the grounding bar (15). A stabilizing beam (10) is also connected between the two fixed plates (1).

3. The environmentally friendly horizontal PT switch according to claim 2, characterized in that, The isolation shaft assembly (7) includes several colinearly arranged insulating shafts (71). An insulating plate (72) is integrally provided in the middle of the outer wall of the insulating shaft (71). A notch (73) is also provided in the middle of the outer wall of the insulating shaft (71). A through hole (74) is provided inside the insulating plate (72). The through hole (74) is connected to the notch (73). A moving contact (75) is fixedly installed inside the through hole (74) at the end of the insulating plate (72) away from the notch (73). The moving contact (75) is connected to a corresponding copper rod (6) through an electric wire.

4. The environmentally friendly horizontal PT switch according to claim 3, characterized in that, The automatic disconnection component (11) includes a horizontal bar (17) fixedly installed on a fixed plate (1). A support frame (18) is integrally provided at the top center of the horizontal bar (17). An assembly shaft (19) is rotatably installed on the support frame (18). One end of the assembly shaft (19) is connected to an adjustment shaft (9). A gear (20) is also fixedly installed on the assembly shaft (19). A sliding groove (21) is provided on the horizontal bar (17) along its length direction. A rack (22) is slidably installed in the sliding groove (21). The rack (22) meshes with the gear (20).

5. The environmentally friendly horizontal PT switch according to claim 4, characterized in that, The horizontal bar (17) is also provided with a strip hole (23) arranged along its length direction. The strip hole (23) is connected to the slide groove (21). A retaining groove (24) is provided at the bottom of one end of the rack (22). An assembly frame (25) is also provided below the horizontal bar (17). The assembly frame (25) is fixedly installed on the side wall of the fixed plate (1). A thermal actuator (26) is installed on the assembly frame (25). A telescopic rod (27) extends from one end of the thermal actuator (26). A connecting frame (28) is fixedly installed at the end of the telescopic rod (27). A push rod (29) is fixedly installed at the end of the connecting frame (28) away from the telescopic rod (27). The top of the push rod (29) is provided through the strip hole (23).

6. The environmentally friendly horizontal PT switch according to claim 5, characterized in that, A stop bar (30) is also fixedly installed on the fixed plate (1), and when the push rod (29) moves to the position of the stop bar (30), the moving contact (75) contacts the second stationary contact (16).

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