Busbar room transmission structure of environmental protection gas cabinet

Abstract

The utility model discloses a bus room transmission structure of environmental protection gas cabinet, including the box, the bottom surface of box is rotatively connected with first sealed pivot and second sealed pivot, be connected with disconnecting switch subassembly on first sealed pivot, be connected with grounding switch subassembly on second sealed pivot, the lower extreme of first sealed pivot is connected with first pivot gear, the lower extreme of second sealed pivot is connected with second pivot gear, the outside of box is provided with operating mechanism, the lower extreme of operating mechanism is connected with elbow arm subassembly, elbow arm subassembly includes first elbow arm and second elbow arm, the first elbow arm is hinged with first pull rod, the end of first pull rod is hinged with first pull rod rack, first pull rod rack is engaged with first pivot gear, the utility model discloses the rotation of pivot gear is driven through the telescopic of pull rod rack, further make gear drive moving contact head move forward and backward, realize the control of circuit on-off.

Description

Technical Field

[0001] This utility model relates to the technical field of three-position switch transmission structure, specifically the busbar compartment transmission structure of an environmentally friendly gas cabinet. Background Technology

[0002] Switchgear is a common type of complete switchgear. Switchgear typically uses isolating and grounding combination switches, which achieve the three positions of isolation, grounding, and intermediate status by driving the movement of the moving contact through a transmission device. In traditional electrical connections, the transmission device for the moving contact is a crank arm that drives a connecting rod to make the moving contact swing and rotate to achieve the switching between the three positions of isolation, grounding, and intermediate status. The movement of the moving contact and the stationary contact are driven by the transmission between the connecting rods. However, because the movement accuracy of the connecting rods is low, the transmission between multiple connecting rods can affect the stability of the transmission between the switches. At the same time, the connecting rod structure occupies a lot of space, which is not conducive to reducing the size of the switchgear and achieving a compact design. Utility Model Content

[0003] The purpose of this utility model is to provide a busbar chamber transmission structure for an environmentally friendly gas cabinet. By swinging the crank arm assembly, the position of the first crank arm and the second crank arm is controlled, which pushes and pulls the first pull rod and the second pull rod, causing the first pull rod rack and the second pull rod rack to extend and retract, further driving the rotation of the first sealing shaft and the second sealing shaft, thus enabling the operation of the disconnecting switch assembly and the grounding switch assembly. The transmission of the rack and pinion gears makes the drive of the disconnecting switch assembly and the grounding switch assembly more stable.

[0004] This utility model provides the following technical solution: a busbar chamber transmission structure for an environmentally friendly gas cabinet, including a housing. A first sealing shaft and a second sealing shaft are rotatably connected to the bottom surface of the housing. An isolating switch assembly is connected to the first sealing shaft, and a grounding switch assembly is connected to the second sealing shaft. A first rotating shaft gear is connected to the lower end of the first sealing shaft, and a second rotating shaft gear is connected to the lower end of the second sealing shaft. An operating mechanism is provided on the outside of the housing. A crank arm assembly is connected to the lower end of the operating mechanism. The crank arm assembly includes a first crank arm and a second crank arm. A first pull rod is hinged to the first crank arm, and a first pull rod rack is hinged to the end of the first pull rod. The first pull rod rack meshes with the first rotating shaft gear. A second pull rod is hinged to the second crank arm, and a second pull rod rack is hinged to the end of the second pull rod. The second pull rod rack meshes with the second rotating shaft gear. The swing of the crank arm assembly controls the forward and backward movement of the first and second pull rods, driving the first and second pull rod racks to pull, thus pushing the isolating switch assembly and the grounding switch assembly to operate.

[0005] To enable the isolating switch assembly to move the isolating moving contact, the isolating switch assembly includes a first drive shaft and a second drive shaft. The first drive shaft is connected to a sealed rotating shaft, and the second drive shaft is connected to the upper end of the first drive shaft. Gears are connected to the upper ends of both the first and second drive shafts. The isolating moving contact is meshed on one side of the gear, and an internal toothed rack that meshes with the gear is formed on the surface of the isolating moving contact.

[0006] To ensure stable meshing between the moving contact and the gear, a groove is used to limit the gear. A second sleeve is fixed on one inner wall of the housing, and an isolation sleeve is connected to the second sleeve. The moving contact is inserted into the isolation sleeve, and a groove is formed on the side of the isolation sleeve. A part of the gear is embedded in the groove.

[0007] In order to isolate the moving contact from the busbar contact and make the circuit conductive, a first sleeve is fixed on the other inner wall of the housing. The end of the first sleeve is connected to a busbar, and a busbar contact is connected to the busbar. The busbar contact is plugged into the isolating moving contact.

[0008] To ensure a stable connection between the busbar contact and the isolating moving contact, the cross-section of the busbar contact is concave. The busbar contact is connected to the busbar, and the concave inner side of the busbar contact is inserted into the isolating moving contact.

[0009] In order to control the connection between the grounding knife and the sleeve contact to ground the circuit, the grounding switch assembly includes a grounding drive shaft. One end of the grounding drive shaft is connected to a second sealed rotating shaft, and the other end of the grounding drive shaft is rotatably connected to the top wall of the housing. A grounding knife is connected to the grounding drive shaft, and a sleeve contact is formed on the isolation sleeve. The grounding knife swings and contacts the sleeve contact.

[0010] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0011] (1) By swinging the crank arm assembly, the position of the first crank arm and the second crank arm is controlled, and the first pull rod and the second pull rod are pushed and pulled, so that the first pull rod rack and the second pull rod rack extend and retract, which further drives the rotation of the first sealing shaft and the second sealing shaft, so that the disconnecting switch assembly and the grounding switch assembly can operate. By using the transmission of rack and gear, the drive of the disconnecting switch assembly and the grounding switch assembly is more stable.

[0012] (2) By meshing the internal rack and gear on the surface of the moving contact, the extension and retraction of the pull rod can drive the disconnect switch assembly to rotate, and the gear can drive the internal rack of the moving contact to move back and forth, thereby controlling the front and back position of the moving contact and making the circuit open or closed. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a top view of the overall structure of this utility model;

[0015] Figure 2 This is a front view of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the busbar chamber transmission structure of this utility model in the states of isolation closed and grounding open;

[0017] Figure 4 This is a schematic diagram of the busbar chamber transmission structure of this utility model in the state of the isolation branch and the grounding branch;

[0018] Figure 5 This is a schematic diagram of the busbar chamber transmission structure of this utility model in the isolation open and grounding closed states;

[0019] In the diagram: 1. Housing; 2. First bushing; 3. Busbar; 4. Busbar contact; 5. Isolating moving contact; 51. Moving contact internal rack; 6. Isolating sleeve; 61. Sleeve contact; 7. Second bushing; 8. Gear; 9. First rotating shaft gear; 10. First pull rod rack; 11. First pull rod; 12. Grounding knife; 13. Second rotating shaft gear; 14. Second pull rod rack; 15. Second pull rod; 16. Pin; 17. Second crank arm; 18. First crank arm; 19. Grounding drive shaft; 20. First drive shaft; 21. Second drive shaft; 22. First rotating shaft; 23. Second rotating shaft; 24. Three-position switch; 25. First sealing rotating shaft; 26. Second sealing rotating shaft. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 and Figure 2This utility model provides a technical solution: a busbar chamber transmission structure for an environmentally friendly gas cabinet, including a housing 1. A first sealing shaft 25 and a second sealing shaft 26 are inserted into the bottom surface of the housing 1. Both the first sealing shaft 25 and the second sealing shaft 26 rotate within the housing 1. An isolating switch assembly is connected to the first sealing shaft 25, and a grounding switch assembly is connected to the second sealing shaft 26. A first shaft gear 9 is connected to the lower end of the first sealing shaft 25, and a second shaft gear 13 is connected to the lower end of the second sealing shaft 26. A three-position switch 24 is provided on the outside of the housing 1. The lower end of the three-position switch 24 is connected to a crank arm assembly, which includes a first crank arm 18 and a second crank arm 17. The first crank arm 18 and the second crank arm 17 are connected together by a pin 16 and rotate simultaneously. The first crank arm 18 is connected to the operating mechanism 24 via a first rotating shaft 22, and the second crank arm 17 is connected to the operating mechanism 24 via a second rotating shaft 23. A first pull rod 11 is hinged to the first crank arm 18, and a first pull rod rack 10 is hinged to the end of the first pull rod 11. The first pull rod rack 10 meshes with a first rotating shaft gear 9. The second crank arm 17 is hinged to a second pull rod 15, and a second pull rod rack 14 is hinged to the end of the second pull rod 15. The second pull rod rack 14 meshes with the second rotating shaft gear 13. The swing of the crank arm assembly controls the forward and backward movement of the first pull rod 11 and the second pull rod 15, which in turn drives the first pull rod rack 10 and the second pull rod rack 14 to pull, thus pushing the disconnecting switch assembly and the grounding switch assembly to operate. By operating the crank arm assembly at different positions of the operating mechanism 24, the disconnecting switch assembly and the grounding switch assembly are operated, thereby further controlling the on / off state of the circuit and the stability of the grounding. Furthermore, this control structure utilizes the displacement of the crank arm assembly of the operating mechanism 24, and through the meshing of the corresponding pull rod rack and the corresponding rotating shaft gear, causes the corresponding rotating shaft gear to rotate, thereby realizing the operation of the disconnecting switch assembly and the grounding switch assembly. The disconnecting switch assembly pushes the movement of the disconnecting moving contact 5, controlling the connection and disconnection between the disconnecting moving contact 5 and the busbar contact 4. The grounding switch assembly controls the swing angle of the grounding knife 12, controlling the contact between the grounding knife 12 and the sleeve contact 61. Through the meshing of the rack and gear, the disconnecting switch assembly and the grounding switch assembly are driven to operate, improving the stability of the mechanism transmission.

[0022] The disconnector assembly includes a first drive shaft 20 and a second drive shaft 21. The first drive shaft 20 is connected to a first sealing shaft 25 and rotates together with the first sealing shaft 25. The second drive shaft 21 is connected to the upper end of the first drive shaft 20 and rotates together with the first drive shaft 20. Gears 8 are connected to the upper ends of both the first drive shaft 20 and the second drive shaft 21. An isolating moving contact 5 is meshed on one side of the gear 8. An internal rack 51 of the moving contact is formed on the surface of the isolating moving contact 5 and meshes with the gear 8. By stretching the first pull rod 11, the first pull rod rack 10 drives the first rotating shaft gear 9 to rotate, causing the first sealing shaft 25, the second drive shaft 21 and the first drive shaft 20 to rotate, and causing the gear 8 to rotate and push the isolating moving contact 5 to move.

[0023] A second sleeve 7 is fixed on one inner wall of the housing 1. An isolation sleeve 6 is inserted and fixed on the second sleeve 7. The isolation moving contact 5 is inserted into the isolation sleeve 6 and moves along the axial direction of the isolation sleeve 6. A groove is opened on the side of the isolation sleeve 6. A part of the gear 8 is embedded in the groove, so that the gear 8 can smoothly mesh with the moving contact internal rack 51 on the surface of the isolation moving contact 5. At the same time, the gear 8 is located in the groove, which limits the position of the gear 8.

[0024] A first sleeve 2 is fixed on the other inner wall of the housing 1. A busbar 3 is connected to the end of the first sleeve 2. A busbar contact 4 is connected to the busbar 3. When the busbar contact 4 is plugged into the isolating moving contact 5, the circuit is connected. When the busbar contact 4 is separated from the isolating moving contact 5, the circuit is disconnected and the isolating moving contact 5 is isolated, ensuring the safety of the operator during maintenance.

[0025] The cross-section of the busbar contact 4 is concave. The busbar contact 4 is connected to the busbar 3. When the concave inner side of the busbar contact 4 is inserted into the isolating moving contact 5, the inner side of the busbar contact 4 wraps around the cylindrical surface of the isolating moving contact 5, which increases the contact area between the isolating moving contact 5 and the busbar contact 4, ensuring the connection stability of the two and making the circuit connection stable.

[0026] The grounding switch assembly includes a grounding drive shaft 19, one end of which is connected to a second sealing shaft 26. The grounding drive shaft 19 and the second sealing shaft 26 rotate together. The other end of the grounding drive shaft 19 is rotatably connected to the top wall of the housing 1. A grounding knife 12 is fixed to the grounding drive shaft 19 by bolts. A sleeve contact 61 is formed on the isolation sleeve 6. The grounding knife 12 swings and contacts the sleeve contact 61. The circuit is grounded through the contact between the grounding knife 12 and the sleeve contact 61.

[0027] Three-station operation:

[0028] like Figure 3As shown, at one workstation, the first pull rod 11 is pushed downwards into the housing 1. The first pull rod 11 drives the first pull rod rack 10 to extend inwards, causing the first rotating shaft gear 9 to rotate, which in turn drives the isolating switch assembly to operate, causing the isolating moving contact 5 to extend out and connect with the busbar contact 4, thereby realizing the conduction of the circuit.

[0029] like Figure 4 As shown, at another work station, the first pull rod 11 is pulled out to the outside of the housing 1. The first pull rod 11 drives the first pull rod rack 10 to extend outward, causing the first rotating shaft gear 9 to rotate, driving the disconnect switch assembly to operate, causing the disconnect moving contact 5 to move outward and insert into the disconnect sleeve 6, and the disconnect moving contact 5 to separate from the bus contact 4.

[0030] like Figure 5 As shown, at one station, the second pull rod 15 is pushed into the lower part of the housing 1. The second pull rod 15 drives the second pull rod rack 14 to move, causing the grounding drive shaft 19 to rotate, causing the grounding knife 12 to rotate and contact the sleeve contact 61, thus achieving grounding.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A busbar compartment drive structure for an environmentally friendly gas control cabinet, including a cabinet body, characterized in that: A first sealing shaft and a second sealing shaft are rotatably connected to the bottom surface of the housing. A disconnecting switch assembly is connected to the first sealing shaft, and a grounding switch assembly is connected to the second sealing shaft. A first rotating shaft gear is connected to the lower end of the first sealing shaft, and a second rotating shaft gear is connected to the lower end of the second sealing shaft. An operating mechanism is provided on the outside of the housing, and a crank arm assembly is connected to the lower end of the operating mechanism. The crank arm assembly includes a first crank arm and a second crank arm. A first pull rod is hinged to the first crank arm, and a first pull rod rack is hinged to the end of the first pull rod. The first pull rod rack meshes with the first rotating shaft gear. A second pull rod is hinged to the second crank arm, and a second pull rod rack is hinged to the end of the second pull rod. The second pull rod rack meshes with the second rotating shaft gear. The swinging of the crank arm assembly controls the forward and backward movement of the first and second pull rods, which in turn pulls the first and second pull rod racks, thus driving the disconnecting switch assembly and the grounding switch assembly to operate.

2. The busbar chamber transmission structure of the environmentally friendly gas cabinet according to claim 1, characterized in that: The disconnector assembly includes a first drive shaft and a second drive shaft. The first drive shaft is connected to a sealed rotating shaft, and the second drive shaft is connected to the upper end of the first drive shaft. Gears are connected to the upper ends of both the first and second drive shafts. An isolation moving contact is meshed on one side of the gear, and an internal toothed rack that meshes with the gear is formed on the surface of the isolation moving contact.

3. The busbar compartment transmission structure of the environmentally friendly gas cabinet according to claim 2, characterized in that: A second sleeve is fixed on one inner wall of the housing, and an isolation sleeve is connected to the second sleeve. The isolation moving contact is inserted into the isolation sleeve, and a groove is opened on the side of the isolation sleeve. A part of the gear is embedded in the groove.

4. The busbar compartment transmission structure of the environmentally friendly gas cabinet according to claim 1, characterized in that: A first sleeve is fixed on the other inner wall of the housing. A busbar is connected to the end of the first sleeve. A busbar contact is connected to the busbar and the busbar contact is plugged into the isolating moving contact.

5. The busbar compartment transmission structure of the environmentally friendly gas cabinet according to claim 4, characterized in that: The cross-section of the busbar contact is concave, the busbar contact is connected to the busbar, and the concave inner side of the busbar contact is inserted into the isolating moving contact.

6. The busbar compartment transmission structure of the environmentally friendly gas cabinet according to claim 3, characterized in that: The grounding switch assembly includes a grounding drive shaft, one end of which is connected to a second sealed rotating shaft, and the other end of which is rotatably connected to the top wall of the housing. A grounding knife is connected to the grounding drive shaft, and a sleeve contact is formed on the isolation sleeve. The grounding knife swings and contacts the sleeve contact.

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