Vacuum load switch with isolation mechanism

Abstract

The utility model discloses a vacuum load switch with an isolation mechanism, which comprises a device outer shell and a top plate arranged at the top end of the device outer shell, a valve shaft is embedded in a machine body rack, a static contact is arranged in an insulating outer cover, a hook is connected with an opening spring and a buffer, and opening and closing functions of the switch are realized. And the opening spring provides bounce to realize the opening function of the switch. The upper and lower isolation plates isolate an upper conductor loop and a lower conductor loop to ensure safe operation of equipment, the upper and lower isolation plates guide a conducting rod to move upwards through a guide plate, the conducting rod is connected with a static contact through a hanging rod, the static contact is connected with an insulating outer cover through a spring washer, the insulating outer cover is connected with an insulating plate through the static contact, and the insulating plate is connected with a middle support through the conducting rod. The upper and lower isolation plates are arranged on the two sides of the machine body rack, and the guide plates guide the conducting rods to move upwards to achieve upper and lower isolation. When the load switch is switched off, the upper and lower conductor loops are disconnected, and upper and lower isolation is realized.

Description

Technical Field

[0001] The utility model relates to a vacuum load switch with an isolation mechanism. Background Art

[0002] A vacuum load switch is an important electrical device, mainly used in power systems to cut off and connect load current, overload current and short-circuit current; a vacuum load switch proposed in a Chinese utility model patent (application number: CN201922474357.4) includes a switch body, a mounting base is provided at the bottom of the shell of the switch body, the mounting base includes two angle steels fixed to the bottom surface of the shell and a plurality of connecting mechanisms installed on the angle steels, the connecting mechanisms include connecting bolts vertically passing through the bottom plate of the angle steels and a reversing shaft horizontally connected to the side plate of the angle steels; the inner end of the reversing shaft is rotatably connected to the side plate of the angle steel, the outer end of the reversing shaft is installed on the bottom plate of the angle steel through a bearing seat, the connecting bolts are driven to rotate by the reversing shaft, and the connecting bolts are connected to the bottom plate of the angle steel by threads. The vacuum load switch of the utility model can achieve rapid installation within the original installation space by optimizing the mounting structure.

[0003] However, the existing vacuum load switch has some shortcomings in the process of use that need to be improved. First of all, the existing vacuum load switch lacks upper and lower isolation mechanisms during use. If it is improperly operated or misoperated, it may cause equipment damage or even cause safety accidents. At the same time, the lack of upper and lower isolation mechanisms will increase the maintenance and inspection workload of the vacuum load switch, and the corresponding maintenance cost will also increase; the lack of upper and lower isolation mechanisms during use will make the working environment of the vacuum load switch more severe, thereby affecting its service life. Therefore, we make improvements to this and propose a vacuum load switch with an isolation mechanism. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a vacuum load switch with an isolation mechanism, comprising an outer shell of the device, and a top plate arranged at the top end of the outer shell of the device, a body frame is fixed with bolts on the bottom plate plane of the top plate, a valve shaft is embedded in the interior of the body frame, and an insulating cover is installed directly in front of the body frame, a static contact is arranged inside the insulating cover, a hanging rod passes through the bottom plate at the rear of the top plate, a spring washer is embedded in the top rod of the hanging rod, and a nut is arranged, a hook is arranged on the bottom rod, a disconnecting spring is arranged in the hook of the hook, and a buffer is connected to the other end of the disconnecting spring, upper and lower isolation plates are fixedly installed on the front plate at the middle end of the outer shell of the device, and a guide plate is connected on the inner plate plane of the upper and lower isolation plates.

[0005] The device outer shell protects the internal structure to prevent the external environment from corroding and damaging the equipment. The top plate is installed with the valve shaft and the insulating cover, and also serves as the installation base for the static contact and the hanging rod. The body frame supports the entire switchgear. The valve shaft is used to open and close the vacuum interrupter to realize the opening and closing functions of the switch. The insulating cover protects the static contact and the insulating plate to improve the insulation performance of the entire device. The static contact connects the upper and lower conductor loops to realize the on-off function of the circuit. The hanging rod connects the conductive rod and the spring washer to play a supporting and guiding role. The spring washer provides a buffering effect to reduce the impact force during switch operation. The hook connects the opening spring and the buffer to realize the opening and closing functions of the switch. The opening spring provides rebound force to realize the opening function of the switch. The buffer absorbs the impact force during switch operation to protect the safety of equipment and personnel. The upper and lower isolation plates isolate the upper and lower conductor loops to ensure the safe operation of the equipment. The upper and lower isolation plates guide the conductive rod to move upward through the guide plate. The conductive rod is connected to the static contact through the hanging rod. The static contact is connected to the insulating cover through the spring washer. The insulating cover is connected to the insulating plate through the static contact. The insulating plate is connected to the middle bracket through the conductive rod. The middle bracket is connected to the outlet terminal through the insulating cover. The outlet terminal is connected to the trip plate through the insulating cover. The upper and lower isolation plates are set on both sides of the body frame. The conductive rod is guided upward by the guide plate to achieve upper and lower isolation. When the load switch is opened, the upper and lower conductor loops are disconnected, achieving upper and lower isolation.

[0006] As a preferred technical solution of the utility model, a conductive rod and a vacuum arc extinguishing chamber are respectively arranged below the guide plate, wherein the bottom of the conductive rod located on the left side is interconnected with the buffer, and the buffer is inclined at an angle of forty-five degrees, and an insulating plate and a middle bracket are installed at the front end and below of the vacuum arc extinguishing chamber.

[0007] With the above structure, the vacuum arc extinguishing function is realized through the vacuum arc extinguishing chamber, thereby improving the operating stability and reliability of the switch. The insulating plate improves the insulation performance of the arc extinguishing chamber and ensures the safe operation of the equipment.

[0008] As a preferred technical solution of the utility model, the middle bracket is in an "L"-shaped structure, and an outlet terminal is provided at the intersection of the horizontal and vertical plates of the middle bracket.

[0009] With the above structure, the upper and lower conductor loops are connected through the outlet terminals to realize the on-off function of the circuit.

[0010] As a preferred technical solution of the utility model, a release plate passes through the surface of the longitudinal plate of the middle bracket, and the release plate is arranged in an obtuse triangle.

[0011] By adopting the above structure, the tripping function of the switch is realized through the tripping plate, thereby ensuring the safe operation of the equipment.

[0012] As a preferred technical solution of the utility model, the rear rotating shaft of the release plate is connected with a linkage rod, the other end of the linkage rod is embedded with a release shaft, and the rear rod body of the linkage rod is connected with a connecting rod.

[0013] With the above structure, the earthing knife and the roller are connected by the linkage rod to realize the opening and closing functions of the switch. The tripping shaft drives the movement of the tripping plate to realize the opening function of the switch.

[0014] As a preferred technical solution of the utility model, a roller is installed on the rotating shaft of the bottom rod of the connecting rod, a grounding knife is connected below the roller, and the connecting rod top rod is connected to the buffer.

[0015] With the above structure, the connecting rod top rod and the buffer are connected to each other, and the buffer absorbs the impact force during the switch operation to protect the safety of equipment and personnel.

[0016] As a preferred technical solution of the utility model, an insulator is installed below the grounding knife, that is, on the bottom plate of the device outer shell, a lower bracket is connected directly in front of the insulator, the outer side of the lower bracket is covered with a grounding terminal, and the other end of the grounding terminal is connected to the grounding knife.

[0017] With the above structure, the grounding knife and the roller are connected by a connecting rod to realize the opening and closing functions of the switch. The grounding knife cuts off the grounding circuit to ensure the safe operation of the equipment. The roller drives the movement of the linkage rod to realize the opening and closing functions of the switch. The insulator improves the insulation performance of the equipment and ensures the safe operation of the equipment. The lower bracket supports the vacuum interrupter and other components to ensure their stability. The grounding terminal connects the grounding circuit to ensure the safe operation of the equipment.

[0018] As a preferred technical solution of the utility model, a high-voltage current-limiting fuse is fixedly mounted on the bottom front plate of the device outer shell, and the high-voltage current-limiting fuse is located below the middle bracket.

[0019] With the above structure, a high-voltage current-limiting fuse is fixedly installed on the bottom front plate of the device housing to perform high-voltage current-limiting protection, and can be fused for protection when overload occurs.

[0020] The utility model has the following beneficial effects: the opening and closing functions of the switch are realized by connecting the opening spring and the buffer by hooking. The opening spring provides rebound force to realize the opening function of the switch. The buffer absorbs the impact force during the switch operation to protect the safety of equipment and personnel. The upper and lower isolation plates isolate the upper and lower conductor loops to ensure the safe operation of the equipment. The upper and lower isolation plates guide the conductive rod to move upward through the guide plate. The conductive rod is connected to the static contact through the hanging rod. The static contact is connected to the insulating cover through the spring washer. The insulating cover is connected to the insulating plate through the static contact. The insulating plate is connected to the middle bracket through the conductive rod. The middle bracket is connected to the outlet terminal through the insulating cover. The outlet terminal is connected to the trip plate through the insulating cover. The upper and lower isolation plates are arranged on both sides of the body frame, and the conductive rod is guided to move upward through the guide plate to realize upper and lower isolation. When the load switch is opened, the upper and lower conductor loops are disconnected, realizing upper and lower isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional structural diagram of the utility model;

[0022] Figure 2 This is the main structural diagram of the utility model;

[0023] Figure 3 This is a left-side structural diagram of the utility model;

[0024] Figure 4 This is a structural diagram of the connecting rod of the utility model. DETAILED DESCRIPTION

[0025] The vacuum load switch with isolation mechanism of the utility model is implemented as follows: Figure 1-4 As shown: it includes an outer shell 1 of the device, and a top plate 2 arranged at the top of the outer shell 1 of the device, a body frame 3 is fixed by bolts on the bottom plate plane of the top plate 2, a valve shaft 4 is embedded in the body frame 3, and an insulating cover 5 is installed directly in front of the body frame 3, and a static contact 6 is arranged inside the insulating cover 5, a hanging rod 7 passes through the bottom plate at the rear of the top plate 2, a spring washer 8 is embedded in the top rod of the hanging rod 7, and a nut is arranged, a hook 9 is arranged on the bottom rod, a disconnecting spring 10 is arranged in the hook of the hook 9, and a buffer 11 is connected to the other end of the disconnecting spring 10, and upper and lower isolation plates 12 are fixedly installed on the front plate at the middle end of the outer shell 1 of the device, and a guide plate 13 is connected to the inner plate plane of the upper and lower isolation plates 12.

[0026] Conductive rods 14 and vacuum arc extinguishing chambers 15 are respectively arranged below the guide plate 13, wherein the bottom of the conductive rod 14 on the left side is interconnected with the buffer 11, and the buffer 11 is inclined at a 45-degree angle. The front end and the bottom of the vacuum arc extinguishing chamber 15 are installed with an insulating plate 16 and a middle bracket 17. The middle bracket 17 is an "L"-shaped structure, and an outlet terminal 18 is arranged at the intersection of the horizontal and vertical plates of the middle bracket 17. A trip plate 19 is passed through the surface of the vertical plate of the middle bracket 17, and the trip plate 19 is arranged in an obtuse triangle. The rear shaft of the trip plate 19 is connected to a linkage rod 20, and the other end of the linkage rod 20 is embedded with a trip shaft 21, and the rear rod body of the linkage rod 20 is connected to a connecting rod 22. A roller 24 is installed on the upper shaft of the bottom rod of the connecting rod 22, and a grounding knife 23 is connected below the roller 24, and the top rod of the connecting rod 22 is interconnected with the buffer 11. An insulator 25 is installed below the grounding knife 23, that is, on the bottom plate of the device housing 1, and a lower bracket 26 is connected directly in front of the insulator 25. The outer side of the lower bracket 26 is covered with a grounding terminal 27, and the other end of the grounding terminal 27 is connected to the grounding knife 23. A high-voltage current-limiting fuse 28 is fixedly installed on the front plate at the bottom of the device housing 1, and the high-voltage current-limiting fuse 28 is located below the middle bracket 17.

[0027] The outer shell 1 of the device protects the internal structure and prevents the external environment from corroding and damaging the equipment. The top plate 2 is installed with the valve shaft 4 and the insulating cover 5, and also serves as the installation base for the static contact 6 and the hanging rod 7. The body frame 3 supports the entire switch device. The valve shaft 4 is used to open and close the vacuum interrupter 15 to realize the opening and closing functions of the switch. The insulating cover 5 protects the static contact 6 and the insulating plate 16 to improve the insulation performance of the entire device. The static contact 6 connects the upper and lower conductor loops to realize the circuit on-off function. The hanging rod 7 connects the conductive rod 14 and the spring washer 8 to play a supporting and guiding role. The spring washer 8 provides a buffering effect to reduce the impact force during the switch operation. The hook 9 connects the opening spring 10 and the buffer 11 to realize the opening and closing functions of the switch. The opening spring 10 provides a rebound force to realize the opening function of the switch. The buffer 11 absorbs the impact force during the switch operation to protect the safety of equipment and personnel. The upper and lower isolation plates 12 isolate the upper and lower conductor loops to ensure the safe operation of the equipment. The guide plate 13 guides the movement of the conductive rod 14 to ensure its smooth movement. The conductive rod 14 connects the upper and lower conductor loops to realize the circuit on-off function. The vacuum arc extinguishing chamber 15 realizes the vacuum arc extinguishing function and improves the operating stability and reliability of the switch. The insulating plate 16 improves the insulation performance of the arc extinguishing chamber to ensure the safe operation of the equipment. The middle bracket 17 supports the static contact 6 and the insulating cover 5 to ensure their stability. The outlet terminal 18 connects the upper and lower conductor loops to realize the circuit on-off function. The trip plate 19 realizes the switch opening function to ensure the safe operation of the equipment. The linkage rod 20 connects the grounding knife 23 and the roller 24 to realize the switch opening and closing functions. The trip shaft 21 drives the movement of the trip plate 19 to realize the switch opening function. The connecting rod 22 connects the grounding knife 23 and the roller 24 to realize the switch opening and closing functions. The grounding knife 23 cuts off the grounding circuit to ensure the safe operation of the equipment. The roller 24 drives the movement of the linkage rod 20 to realize the switch opening and closing functions. The insulator 25 improves the insulation performance of the equipment and ensures the safe operation of the equipment. The lower bracket 26 supports the vacuum interrupter 15 and other components to ensure their stability. The grounding terminal 27 connects the grounding loop to ensure the safe operation of the equipment.

[0028] The working principle of the utility model is as follows: when the load switch is in the closed state, the linkage rod 20 is connected to the grounding knife 23 through the connecting rod 22, the grounding knife 23 is connected to the roller 24 through bolts, and the grounding knife 23 and the roller 24 are connected to the linkage rod 20 through the connecting rod 22. The distance between the grounding knife 23 and the roller 24 can be adjusted by adjusting the bolts to adapt to different grounding current requirements. When the load switch needs to be opened, the opening spring 10 pushes the trip plate 19 to move downward, the trip plate 19 drives the linkage rod 20 to move upward through the trip shaft 21, and the linkage rod 20 drives the grounding knife 23 to move downward through the connecting rod 22, the distance between the grounding knife 23 and the roller 24 becomes smaller, and the grounding current flows into the earth through the roller 24. When the load switch is opened, the upper and lower isolation plates 12 guide the conductive rod 14 to move upward through the guide plate 13, the conductive rod 14 is connected to the static contact 6 through the hanging rod 7, the static contact 6 is connected to the insulating cover 5 through the spring washer 8, the insulating cover 5 is connected to the insulating plate 16 through the static contact 6, the insulating plate 16 is connected to the middle bracket 17 through the conductive rod 14, the middle bracket 17 is connected to the outlet terminal 18 through the insulating cover 5, and the outlet terminal 18 is connected to the trip plate 19 through the insulating cover 5. The upper and lower isolation plates 12 are arranged on both sides of the body frame 3, and the conductive rod 14 is guided to move upward through the guide plate 13 to achieve upper and lower isolation. When the load switch is opened, the upper and lower conductor loops are disconnected, achieving upper and lower isolation.

[0029] The above embodiments are only preferred specific embodiments of the present invention, which are vacuum load switches with an isolation mechanism. The usual changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A vacuum load switch with an isolation mechanism, comprising an outer shell of the device, and a top plate arranged on the top of the outer shell of the device, characterized in that: A body frame is fixed with bolts on the plane of the bottom plate of the top plate, a valve shaft is embedded in the interior of the body frame, and an insulating cover is installed directly in front of the body frame, a static contact is arranged inside the insulating cover, a hanging rod passes through the bottom plate at the rear of the top plate, a spring washer is embedded in the top rod of the hanging rod, and a nut is arranged, a hook is arranged on the bottom rod, a disconnecting spring is arranged in the hook of the hook, and a buffer is connected to the other end of the disconnecting spring, upper and lower isolation plates are fixedly installed on the front plate at the middle end of the outer shell of the device, and a guide plate is connected to the inner plate plane of the upper and lower isolation plates.

2. The vacuum load switch with isolation mechanism according to claim 1, characterized in that: A conductive rod and a vacuum arc extinguishing chamber are respectively arranged below the guide plate, wherein the bottom of the conductive rod on the left side is connected to the buffer, and the buffer is inclined at an angle of forty-five degrees, and an insulating plate and a middle bracket are installed at the front end and below of the vacuum arc extinguishing chamber.

3. The vacuum load switch with isolation mechanism according to claim 2, characterized in that: The middle bracket is in an "L"-shaped structure, and an outlet terminal is provided at the intersection of the horizontal and vertical plates of the middle bracket.

4. The vacuum load switch with isolation mechanism according to claim 3, characterized in that: A release plate is passed through the surface of the longitudinal plate of the middle bracket, and the release plate is arranged in an obtuse triangle shape.

5. The vacuum load switch with isolation mechanism according to claim 4, characterized in that: The rear rotating shaft of the release plate is connected with a linkage rod, the other end of the linkage rod is embedded with a release shaft, and the rear rod body of the linkage rod is connected with a connecting rod.

6. The vacuum load switch with isolation mechanism according to claim 5, characterized in that: A roller is installed on the rotating shaft of the bottom rod of the connecting rod, a grounding knife is connected below the roller, and the connecting rod top rod is connected to the buffer.

7. The vacuum load switch with isolation mechanism according to claim 6, characterized in that: An insulator is installed below the grounding knife, that is, on the bottom plate of the device housing. A lower bracket is connected directly in front of the insulator. The outer side of the lower bracket is covered with a grounding terminal, and the other end of the grounding terminal is connected to the grounding knife.

8. The vacuum load switch with isolation mechanism according to claim 4, characterized in that: A high-voltage current-limiting fuse is fixedly mounted on the bottom front plate of the device outer shell, and the high-voltage current-limiting fuse is located below the middle bracket.

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