High-reliability isolating switch

Abstract

The utility model relates to a high-reliability isolating switch, which comprises a base, a main shaft and three groups of switch assemblies, each switch assembly comprises a first insulator, a first contact plate, a second insulator, an isolating knife, a driving plate, an isolating pull rod and a second contact plate arranged on the second insulator and matched with the isolating knife, an anti-bounce assembly is arranged between the main shaft and the base and comprises a pressure spring plate arranged on the main shaft, a connector rotationally arranged on the pressure spring plate, a bolt arranged on the base and a pressure spring arranged on the bolt in a sleeving mode, one end of the bolt penetrates through a through hole of the base and is connected to the connector, and the other end of the bolt is connected to the connector. The two ends of the pressure spring abut against the connector and the base respectively. The utility model has the advantages of simple structure, stable and reliable performance, reliable contact, anti-bounce function and high reliability.

Description

Technical Field

[0001] The utility model relates to an isolating switch, in particular to a high-reliability isolating switch. Background Art

[0002] The isolating switch is a switch device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting low current circuits" and has no arc extinguishing function. Its main function is to ensure the safety of high-voltage electrical appliances and devices during maintenance work and to isolate the voltage. The isolating switch is mainly used to reliably isolate the part of the high-voltage power distribution device that needs to be powered off from the live part to ensure the safety of maintenance work. The existing isolating switches do not have an anti-bounce function, the contact between the isolating knife and the static contact piece of the isolating switch is unreliable, the contact pressure between the isolating knife and the static contact piece is small, and the contact resistance is large. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a high-reliability isolating switch with simple structure, stable and reliable performance, reliable contact and anti-bounce function.

[0004] To achieve the above-mentioned purpose, the utility model adopts a high-reliability isolating switch, including a base, a main shaft rotatably set on the base, and three groups of switch components set on the base and linked with the main shaft. The switch component includes a first insulator set on one end of the base, a first contact plate set on the first insulator, a second insulator set on the other end of the base, an isolating knife rotatably set on the first contact plate, a driving plate linked to the main shaft, an isolating pull rod connected between the driving plate and the isolating knife, and a second contact plate set on the second insulator and matched with the isolating knife. An anti-bounce component is arranged between the main shaft and the base, and the anti-bounce component includes a compression spring plate set on the main shaft, a joint rotatably set on the compression spring plate, a bolt set on the base, and a compression spring sleeved on the bolt, one end of the bolt passes through the through hole of the base and is connected to the joint, and the two ends of the compression spring respectively abut against the joint and the base.

[0005] The beneficial effects of the above structure are: an anti-bounce component is arranged between the main shaft and the bottom plate, the anti-bounce component can play an anti-bounce role for the isolation knife, and can ensure that the isolation knife is in reliable contact with the second contact plate, and the compression spring of the anti-bounce component can increase the contact pressure of the isolation knife, and the contact pressure between the isolation knife and the static contact piece is greater, and the contact resistance is smaller. And the isolating switch drives the three groups of switch components to operate through the main shaft, which can ensure the synchronization of the operation of the three groups of switch components and has higher working reliability. Therefore, the isolating switch has the advantages of simple structure, stable and reliable performance, reliable contact, anti-bounce function, and high reliability.

[0006] In particular, the base is provided with a limit assembly matched with the main shaft, the limit assembly includes a limit plate linked to the main shaft, two groups of adjustment bolt assemblies arranged on the base and matched with the limit plate, the adjustment bolt assembly includes a nut arranged on the base, and an adjustment bolt arranged on the nut, and both sides of the limit plate have limit protrusions matched with the adjustment bolts of the two groups of adjustment bolt assemblies, the limit protrusions move with the limit plate and abut against the adjustment bolts, and form a limit match between the limit protrusions and the adjustment bolts. The limit assembly can limit the main shaft, and the limit of the main shaft can be adjusted by rotating the adjustment bolts, which is more convenient to operate.

[0007] In particular, the position-limiting protrusion has a circular arc protrusion contact surface that matches the adjusting bolt, and the circular arc protrusion contact surface moves with the position-limiting protrusion and contacts the adjusting bolt. The position-limiting protrusion matches the adjusting bolt through the circular arc protrusion contact surface, thereby preventing the position-limiting protrusion and the adjusting bolt from being stuck or jammed, thereby facilitating the working reliability of the isolating switch.

[0008] In particular, a reinforcing plate is provided on the base between each two switch components, and the reinforcing plate can enhance the overall strength of the base, thereby facilitating the improvement of the working reliability of the isolating switch.

[0009] In particular, a handle assembly is arranged on one end of the spindle, and the handle assembly comprises a driving plate arranged on one end of the spindle in linkage, a handle arranged on the driving plate, and handle toggling parts are respectively arranged at both ends of the handle. The handle assembly is arranged on the spindle, and the operator can drive the spindle to rotate through the handle assembly, which makes the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a stereogram of an embodiment of the utility model.

[0011] Figure 2 This is a cross-sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0012] like Figures 1-2As shown, the embodiment of the utility model is a high-reliability isolating switch, including a base 10, a main shaft 11 rotatably arranged on the base 10, and three switch components 20 arranged on the base 10 and linked with the main shaft 11. The switch components 20 include a first insulator 21 arranged on one end of the base 10, a first contact plate 22 arranged on the first insulator 21, a second insulator 23 arranged on the other end of the base 10, an isolating knife 24 rotatably arranged on the first contact plate 22, a driving plate 25 linked to the main shaft 11, and a connecting plate 25 connected to the driving plate 25 and the isolating knife 24. An isolation pull rod 26 is arranged between the two, and a second contact plate 27 is arranged on the second insulator 23 and matched with the isolation knife 24. An anti-bounce component 30 is arranged between the main shaft 11 and the base 10. The anti-bounce component 30 includes a compression spring plate 31 arranged on the main shaft 11, a joint 32 rotatably arranged on the compression spring plate 31, a bolt 33 arranged on the base 11, and a compression spring 34 sleeved on the bolt 33. One end of the bolt 33 passes through the through hole 101 of the base 10 and is connected to the joint 32. The two ends of the compression spring 34 respectively abut against the joint 32 and the base 10. The base 10 is provided with a limit assembly 40 matched with the main shaft 11, the limit assembly 40 includes a limit plate 41 linked to the main shaft 11, and two groups of adjusting bolt assemblies 42 arranged on the base 10 and matched with the limit plate 41. The adjusting bolt assembly 42 includes a nut 421 arranged on the base 10 and an adjusting bolt 422 arranged on the nut 421. The limit plate 41 has limit protrusions 411 on both sides matched with the adjusting bolts 422 of the two groups of adjusting bolt assemblies 42. The limit protrusions 411 move with the limit plate 41 and abut against the adjusting bolts 422, and form a limit match between the limit protrusions 411 and the adjusting bolts 422. The limit assembly can limit the main shaft, and the limit of the main shaft can be adjusted by rotating the adjusting bolts, which is more convenient to operate. The position-limiting protrusion 411 has an arc-shaped protrusion contact surface 412 that matches with the adjusting bolt 422. The arc-shaped protrusion contact surface 412 moves with the position-limiting protrusion 411 and contacts with the adjusting bolt 422. The position-limiting protrusion matches with the adjusting bolt through the arc-shaped protrusion contact surface, thereby preventing the position-limiting protrusion and the adjusting bolt from being stuck or stuck, thereby facilitating the working reliability of the isolating switch. A reinforcing plate 102 is respectively arranged between each two groups of switch assemblies 20 on the base 10. The reinforcing plate can enhance the overall strength of the base, thereby facilitating the working reliability of the isolating switch. A handle assembly 50 is arranged on one end of the spindle 11, and the handle assembly 50 includes a driving plate 51 that is linked to one end of the spindle 11 and a handle 52 that is arranged on the driving plate 51. The handle 52 has a handle toggle portion 521 at both ends. The handle assembly is arranged on the spindle, and the operator can drive the spindle to rotate through the handle assembly, which is more convenient to operate.

[0013] An anti-bounce component is provided between the main shaft and the bottom plate. The anti-bounce component can play an anti-bounce role for the isolation knife, and can ensure that the isolation knife is in reliable contact with the second contact plate. The compression spring of the anti-bounce component can increase the contact pressure of the isolation knife, and the contact pressure between the isolation knife and the static contact piece is greater, and the contact resistance is smaller. In addition, the isolating switch drives the three groups of switch components to operate through the main shaft, which can ensure the synchronization of the three groups of switch components and have higher working reliability. Therefore, the isolating switch has the advantages of simple structure, stable and reliable performance, reliable contact, anti-bounce function, and high reliability.

Claims

1. A high-reliability isolating switch, comprising a base, a main shaft rotatably arranged on the base, and three switch components arranged on the base and cooperating with the main shaft, characterized in that: The switch assembly includes a first insulator arranged on one end of the base, a first contact plate arranged on the first insulator, a second insulator arranged on the other end of the base, an isolating knife rotatably arranged on the first contact plate, a driving plate linked to the main shaft, an isolating pull rod connected between the driving plate and the isolating knife, and a second contact plate arranged on the second insulator and matched with the isolating knife. An anti-bounce assembly is arranged between the main shaft and the base. The anti-bounce assembly includes a compression spring plate arranged on the main shaft, a joint rotatably arranged on the compression spring plate, a bolt arranged on the base, and a compression spring sleeved on the bolt. One end of the bolt passes through the through hole of the base and is connected to the joint, and the two ends of the compression spring respectively abut against the joint and the base.

2. The high-reliability isolating switch according to claim 1, characterized in that: The base is provided with a limit assembly that cooperates with the main shaft. The limit assembly includes a limit plate linked to the main shaft, and two groups of adjusting bolt assemblies arranged on the base and cooperating with the limit plate. The adjusting bolt assembly includes a nut arranged on the base and an adjusting bolt arranged on the nut. Both sides of the limit plate are provided with limit protrusions that cooperate with the adjusting bolts of the two groups of adjusting bolt assemblies. The limit protrusions move with the limit plate and abut against the adjusting bolts, and constitute a limit cooperation between the limit protrusions and the adjusting bolts.

3. The high-reliability isolating switch according to claim 2, characterized in that: The position-limiting protrusion is provided with an arc-shaped protrusion contact surface matched with the adjusting bolt, and the arc-shaped protrusion contact surface moves with the position-limiting protrusion and contacts the adjusting bolt.

4. The high-reliability isolating switch according to claim 1 or 2, characterized in that: A reinforcing plate is respectively arranged between each two groups of switch components on the base.

5. The high-reliability isolating switch according to claim 1 or 2, characterized in that: A handle assembly is arranged on one end of the main shaft, and the handle assembly comprises a driving plate linked to one end of the main shaft and a handle arranged on the driving plate, and both ends of the handle are provided with a handle toggling part.

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