Isolating switch

Abstract

The utility model relates to the technical field of isolating switches, and discloses an isolating switch, which is characterized in that a frame is provided with an arc extinguishing assembly positioned below an isolating crank arm A. The arc extinguishing assembly comprises a base fixedly arranged on the frame and a vacuum arc extinguishing chamber fixedly arranged in the base, the moving contact assembly comprises an isolation crank arm B fixedly arranged on the isolation crank arm A, a moving knife holder fixedly installed in the isolation crank arm B, and a moving knife fixedly arranged at the top end of the moving knife holder. The bottom end of the moving knife holder is connected with the vacuum arc-extinguishing chamber. The utility model has the beneficial effects of rapid arc extinguishing and prevention of generation of harmful gas, has high safety and environmental protection property, and solves the problems that the arc extinguishing effect becomes poor and the potential safety hazard is increased due to the fact that the arc extinguishing grid sheet is easy to break or fall off after long-term use, and the arc extinguishing grid sheet can generate harmful gas during arc extinguishing, so that the potential safety hazard is reduced. The environment pollution is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnect switches, and particularly relates to a disconnect switch. Background Art

[0002] A disconnect switch is a switching device mainly used for isolating power sources, performing switching operations, and connecting and disconnecting small-current circuits. When the disconnect switch is in the open position, there is an insulating distance that meets the specified requirements and an obvious disconnection mark between the contacts; when in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time.

[0003] When the disconnect switch opens the circuit, an arc will appear between the moving and static contacts. The arc may burn out the electrical contacts and other components around the contacts. Traditional disconnect switches usually do not have an arc extinguishing device or use arc extinguishing grid plates for arc extinguishing. However, the arc extinguishing grid plates are prone to cracking or falling off after long-term use, which will lead to the problem of poor arc extinguishing effect and the problem of increased safety hazards. Harmful gases will also be generated when the arc extinguishing grid plates extinguish the arc, which will lead to the problem of environmental pollution. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a disconnect switch to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A disconnect switch includes a frame, an isolating crank arm A rotatably arranged on the frame, a moving contact assembly arranged on the isolating crank arm A, a closing assembly arranged on the frame and above the isolating crank arm A, and a grounding assembly arranged on the frame and in front of the isolating crank arm A. It is characterized in that: an arc extinguishing assembly is arranged on the frame below the isolating crank arm A. The arc extinguishing assembly includes a base fixedly installed on the frame and a vacuum arc extinguishing chamber fixedly installed inside the base. The moving contact assembly includes an isolating crank arm B fixedly arranged on the isolating crank arm A, a moving knife seat fixedly installed inside the isolating crank arm B, and a moving knife fixedly arranged at the top of the moving knife seat. The bottom end of the moving knife seat is connected to the vacuum arc extinguishing chamber.

[0006] Preferably, the closing assembly includes a contact seat fixedly arranged on the frame, an isolating buffer cushion block and an isolating static contact fixedly arranged below the contact seat. The isolating buffer cushion block is located behind the isolating static contact, and the moving knife is located on the left and right sides of the isolating static contact.

[0007] Preferably, the grounding assembly includes a grounding cross beam fixedly arranged on the frame, a grounding buffer cushion block and a grounding static contact fixedly arranged behind the grounding cross beam. The grounding buffer cushion block is located below the grounding static contact, and the moving knife is located on the left and right sides of the grounding static contact.

[0008] Preferably, the arc extinguishing assembly further includes a herringbone bracket fixedly installed below the base, a spring pull rod fixedly arranged below the vacuum arc extinguishing chamber, a contact spring washer fixedly arranged on the spring pull rod, a contact spring cap sleeved on the spring pull rod and slidably connected with the spring pull rod, and a contact spring sleeved on the spring pull rod. The two ends of the contact spring are respectively fixedly connected with the contact spring washer and the contact spring cap, and the contact spring cap is movably connected with the herringbone bracket.

[0009] Preferably, the arc extinguishing assembly further includes a hexagonal insulating rod rotatably arranged on the herringbone bracket, a contact opening and closing cam fixedly arranged on the hexagonal insulating rod, and a pulley fixedly arranged on the contact spring cap. An arc-shaped groove is formed in the contact opening and closing cam, and the pulley is inserted into the arc-shaped groove and slidably connected with the contact opening and closing cam.

[0010] Preferably, a spline sleeve is fixedly arranged on the right side of the isolating link arm A, and the spline sleeve is rotatably connected with the frame.

[0011] Preferably, the isolating link arm A, the base, the isolating link arm B and the contact seat are all made of insulating materials.

[0012] The beneficial effects of the present utility model are as follows: When the present utility model is in use, an external spline shaft is inserted into the spline sleeve to be connected with the isolating link arm A, and the rotation of the spline shaft drives the isolating link arm A and the isolating link arm B to rotate. When the isolating link arm B rotates above the isolating link arm A, the moving blade contacts and connects with the isolating static contact, thereby completing the closing. Driving the spline shaft to rotate drives the isolating link arm A and the isolating link arm B to rotate. When the isolating link arm B rotates in front of the isolating link arm A, the moving blade contacts and connects with the grounding static contact, thereby completing the grounding, playing the role of facilitating the opening and closing of the circuit; When the disconnector opens the circuit, an arc will appear between the moving blades. Since the moving blade is fixedly arranged at the top end of the moving blade seat, and the bottom end of the moving blade seat is connected with the vacuum arc extinguishing chamber, the arc generated by the moving blade will enter the vacuum arc extinguishing chamber, and the vacuum arc extinguishing chamber will perform vacuum arc extinguishing on the arc, playing the role of quickly extinguishing the arc and preventing the generation of harmful gases, and having high safety and environmental protection; In summary, the present utility model has the beneficial effects of quickly extinguishing the arc and preventing the generation of harmful gases, has high safety and environmental protection, solves the problems that the arc extinguishing grid pieces are prone to cracking or falling off after long-term use, resulting in poor arc extinguishing effect, leading to an increase in potential safety hazards, and the arc extinguishing grid pieces will also generate harmful gases during arc extinguishing, resulting in environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Att Figure 1 is a schematic structural diagram of the present utility model;

[0014] Att Figure 2 is a schematic top view of the present utility model;

[0015] Att Figure 3 is a schematic bottom view of the present utility model.

[0016] In the figure: frame 1, isolating toggle arm A 2, base 3, vacuum interrupter 4, isolating toggle arm B 5, moving knife seat 6, moving knife 7, contact seat 8, isolating buffer pad 9, isolating static contact 10, grounding crossbeam 11, grounding buffer pad 12, grounding static contact 13, herringbone frame 14, spring pull rod 15, contact spring washer 16, contact spring compression nut 17, contact spring 18, hexagonal insulating rod 19, contact opening and closing cam 20, pulley 21, arc groove 22, spline sleeve 23. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] As Figures 1-3 shown, the present invention discloses a disconnector, including a frame 1, an isolating toggle arm A 2 rotatably arranged on the frame 1, a moving contact assembly arranged on the isolating toggle arm A 2, a closing assembly arranged on the frame 1 and above the isolating toggle arm A 2, and a grounding assembly arranged on the frame 1 and in front of the isolating toggle arm A 2. An arc extinguishing assembly is arranged on the frame 1 below the isolating toggle arm A 2. The arc extinguishing assembly includes a base 3 fixedly installed on the frame 1 and a vacuum interrupter 4 fixedly installed inside the base 3. The moving contact assembly includes an isolating toggle arm B 5 fixedly arranged on the isolating toggle arm A 2, a moving knife seat 6 fixedly installed inside the isolating toggle arm B 5, and a moving knife 7 fixedly arranged at the top end of the moving knife seat 6. The bottom end of the moving knife seat 6 is connected to the vacuum interrupter 4. When the present invention is in use, an external spline shaft is inserted into the spline sleeve 23 and connected to the isolating toggle arm A 2. Driving the spline shaft to rotate drives the isolating toggle arm A 2 and the isolating toggle arm B 5 to rotate. When the isolating toggle arm B 5 rotates above the isolating toggle arm A 2, the moving knife 7 contacts and connects with the isolating static contact 10, thereby completing closing. Driving the spline shaft to rotate drives the isolating toggle arm A 2 and the isolating toggle arm B 5 to rotate. When the isolating toggle arm B 5 rotates in front of the isolating toggle arm A 2, the moving knife 7 contacts and connects with the grounding static contact 13, thereby completing grounding, which plays a role in facilitating the opening and closing of the circuit. When the disconnector opens and closes the circuit, an arc will appear between the moving knives 7. Since the moving knife 7 is fixedly arranged at the top end of the moving knife seat 6 and the bottom end of the moving knife seat 6 is connected to the vacuum interrupter 4, the arc generated by the moving knife 7 will enter the vacuum interrupter 4, and the vacuum interrupter 4 will perform vacuum arc extinguishing on the arc, which plays a role in quickly extinguishing the arc and preventing the generation of harmful gases, and has high safety and environmental protection. To sum up, the present invention has the beneficial effects of quickly extinguishing the arc and preventing the generation of harmful gases, has high safety and environmental protection, solves the problems that the arc extinguishing grid is prone to cracking or falling off after long-term use, resulting in a deterioration of the arc extinguishing effect, leading to an increase in safety hazards, and the arc extinguishing grid will also generate harmful gases during arc extinguishing, resulting in environmental pollution.

[0019] Preferably, the closing assembly includes a contact seat 8 fixedly arranged on the frame 1, an isolation buffer pad 9 fixedly arranged below the contact seat 8, and an isolation static contact 10, wherein the isolation buffer pad 9 is located at the rear side of the isolation static contact 10, and the movable blade 7 is located at the left and right sides of the isolation static contact 10. Since the isolation buffer pad 9 is located at the rear side of the isolation static contact 10, the movable blade 7 will contact and connect with the isolation buffer pad 9 when it is in contact and connected with the isolation static contact 10, thereby supporting the movable blade 7; since the movable blade 7 is located at the left and right sides of the isolation static contact 10, the movable blade 7 is in double-point contact when it is in contact and connected with the isolation static contact 10, thereby improving the contact stability.

[0020] Preferably, the grounding assembly includes a grounding beam 11 fixedly arranged on the frame 1, a grounding buffer pad 12 fixedly arranged at the rear side of the grounding beam 11, and a grounding static contact 13, wherein the grounding buffer pad 12 is located below the grounding static contact 13, and the movable blade 7 is located on the left and right sides of the grounding static contact 13. Since the grounding buffer pad 12 is located below the grounding static contact 13, the movable blade 7 will be in contact with the grounding buffer pad 12 when it is in contact with the grounding static contact 13, thereby supporting the movable blade 7; since the movable blade 7 is located on the left and right sides of the grounding static contact 13, the movable blade 7 is in double-point contact when it is in contact with the grounding static contact 13, thereby improving the contact stability.

[0021] Preferably, the arc extinguishing assembly further comprises a herringbone frame 14 fixedly mounted below the base 3, a spring pull rod 15 fixedly mounted below the vacuum arc extinguishing chamber 4, a contact spring washer 16 fixedly mounted on the spring pull rod 15, a contact spring pressure cap 17 sleeved on the spring pull rod 15 and slidably connected to the spring pull rod 15, and a contact spring 18 sleeved on the spring pull rod 15, wherein the two ends of the contact spring 18 are respectively fixedly connected to the contact spring washer 16 and the contact spring pressure cap 17, and the contact spring pressure cap 17 is movably connected to the herringbone frame 14. Since the two ends of the contact spring 18 are respectively fixedly connected to the contact spring washer 16 and the contact spring pressure cap 17, and the contact spring pressure cap 17 is movably connected to the herringbone frame 14, it is convenient to adjust the hardness of the contact spring 18.

[0022] Preferably, the arc extinguishing assembly further includes a hexagonal insulating rod 19 rotatably arranged on the herringbone frame 14, a contact opening and closing cam 20 fixedly arranged on the hexagonal insulating rod 19, and a pulley 21 fixedly arranged on the contact spring compression cap 17. An arc-shaped groove 22 is formed in the contact opening and closing cam 20, and the pulley 21 is inserted into the arc-shaped groove 22 and slidably connected to the contact opening and closing cam 20. Since the arc-shaped groove 22 is formed in the contact opening and closing cam 20 and the pulley 21 is inserted into the arc-shaped groove 22 and slidably connected to the contact opening and closing cam 20, rotating the hexagonal insulating rod 19 drives the contact opening and closing cam 20 to rotate, causing the pulley 21 to slide inside the arc-shaped groove 22, so that the contact spring compression cap 17 can slide on the spring pull rod 15, which facilitates the sliding of the contact spring compression cap 17 and thus facilitates the adjustment of the hardness of the contact spring 18.

[0023] Preferably, a spline sleeve 23 is fixedly arranged on the right side of the isolating toggle arm A2, and the spline sleeve 23 is rotatably connected to the frame 1. Since the spline sleeve 23 is rotatably connected to the frame 1, when the spline shaft is inserted into the spline sleeve 23 to rotate the isolating toggle arm A2, it plays a role in enhancing the bearing capacity.

[0024] Preferably, the isolating toggle arm A2, the base 3, the isolating toggle arm B5, and the contact seat 8 are all made of insulating materials. Since the isolating toggle arm A2, the base 3, the isolating toggle arm B5, and the contact seat 8 are all made of insulating materials, it plays an insulating role.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An isolating switch, comprising a frame (1), an isolating arm A (2) rotatably mounted on the frame (1), a moving contact assembly mounted on the isolating arm A (2), a closing assembly mounted on the frame (1) and located above the isolating arm A (2), and a grounding assembly mounted on the frame (1) and located in front of the isolating arm A (2), characterized in that: The frame (1) is provided with an arc extinguishing assembly located below the isolation crank arm A (2), the arc extinguishing assembly comprising a base (3) fixedly mounted on the frame (1), a vacuum arc extinguishing chamber (4) fixedly mounted inside the base (3), the moving contact assembly comprising an isolation crank arm B (5) fixedly mounted on the isolation crank arm A (2), a moving knife seat (6) fixedly mounted inside the isolation crank arm B (5), and a moving knife (7) fixedly mounted at the top of the moving knife seat (6), the bottom end of the moving knife seat (6) being connected to the vacuum arc extinguishing chamber (4).

2. The isolating switch according to claim 1, characterized in that: The closing assembly comprises a contact seat (8) fixedly arranged on a frame (1), an isolating buffer pad (9) fixedly arranged below the contact seat (8), and an isolating static contact (10), wherein the isolating buffer pad (9) is located at the rear side of the isolating static contact (10), and the movable blade (7) is located at the left and right sides of the isolating static contact (10).

3. The isolating switch according to claim 1, characterized in that: The grounding assembly comprises a grounding beam (11) fixedly arranged on a frame (1), a grounding buffer pad (12) fixedly arranged on the rear side of the grounding beam (11), and a grounding static contact (13), wherein the grounding buffer pad (12) is located below the grounding static contact (13), and the movable blade (7) is located on the left and right sides of the grounding static contact (13).

4. The isolating switch according to claim 1, characterized in that: The arc extinguishing assembly further comprises a herringbone frame (14) fixedly mounted below the base (3), a spring pull rod (15) fixedly mounted below the vacuum arc extinguishing chamber (4), a contact spring washer (16) fixedly mounted on the spring pull rod (15), a contact spring pressure cap (17) sleeved on the spring pull rod (15) and slidably connected to the spring pull rod (15), and a contact spring (18) sleeved on the spring pull rod (15), wherein two ends of the contact spring (18) are respectively fixedly connected to the contact spring washer (16) and the contact spring pressure cap (17), and the contact spring pressure cap (17) is movably connected to the herringbone frame (14).

5. The isolating switch according to claim 4, characterized in that: The arc extinguishing assembly further comprises a hexagonal insulating rod (19) rotatably mounted on the herringbone frame (14), a contact separation and connection cam (20) fixedly mounted on the hexagonal insulating rod (19), and a pulley (21) fixedly mounted on the contact spring pressure cap (17); the contact separation and connection cam (20) is provided with an arc groove (22); the pulley (21) is inserted into the arc groove (22) and is slidably connected to the contact separation and connection cam (20).

6. The isolating switch according to claim 1, characterized in that: A spline sleeve (23) is fixedly provided on the right side of the isolation crank arm A (2), and the spline sleeve (23) is rotatably connected to the frame (1).

7. The isolating switch according to claim 1, characterized in that: The isolation crank arm A (2), the base (3), the isolation crank arm B (5) and the contact seat (8) are all made of insulating materials.

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