Double-column isolating switch

Abstract

The utility model discloses a double-column isolating switch, which is characterized in that the double-column isolating switch comprises a base, a first insulating column, a second insulating column, a first wiring contact, a second wiring contact and a knife switch rod, the first insulating column and the second insulating column are respectively arranged on two sides of the base; the first wiring contact and the second wiring contact are respectively fixed on the first insulating column and the second insulating column, the first insulating column is provided with a movably connected knife switch rod, the head of the knife switch rod is provided with an arc corner, the second wiring contact comprises a limiting groove, and the insulating handle is provided with a spring clamping device. According to the utility model, the limiting groove can be conveniently clamped through the spring clamping device, so that the contact between the wiring contact and the knife switch rod is not easy to loosen; the head of the knife switch rod is provided with an arc corner, so that the contact surface between the knife switch rod and the second wiring contact is increased, the pressure applied to the second wiring contact is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment for power transmission and distribution, and more specifically to a double-column isolating switch. Background Art

[0002] Currently, disconnectors are a critical device used in power systems. Their primary function is to provide a visible disconnect point in a circuit to ensure safe isolation during maintenance and overhaul. Disconnectors lack arc extinguishing devices and are primarily used to disconnect circuits with no-load currents, such as charging current in lines and excitation current in voltage transformers. They are used to establish a reliable insulation gap in the open state to ensure the safety of maintenance personnel and equipment.

[0003] At present, the Chinese patent with announcement number CN201820880532.2 discloses a manual double-column vertical opening disconnector including a fixed base, a No. 1 insulator is fixedly installed on the upper outer surface of the fixed base, and a No. 2 insulator is fixedly installed on the side of the upper outer surface of the fixed base close to the No. 1 insulator, a No. 1 conductive plate is fixedly installed on the upper outer surface of the No. 1 insulator, and a No. 1 connecting bolt is fixedly installed on the upper outer surface of the No. 1 conductive plate, a rotating pin is provided on the outer surface of one end of the No. 1 conductive plate, and a shock-absorbing washer plate is provided on the outer surface of the lower end of the rotating pin, a No. 1 positioning pin is fixedly installed on the outer surface of one end of the shock-absorbing washer plate, and a shock-absorbing washer is installed around the outer surface of the No. 1 positioning pin.

[0004] However, there are still some defects in the above-mentioned existing technology. The contact between the No. 1 conductive plate and the conductive rod is not reliable, and it is easy to slip when impacted, and the operation process is not convenient; the insulator is easily damaged by impact, has limited environmental adaptability, is prone to misoperation, and has certain safety hazards. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a double-column isolating switch.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including a base, a first insulating column, a second insulating column, a first wiring contact, a second wiring contact, and a knife rod, the first insulating column and the second insulating column are respectively arranged on both sides of the base, the first wiring contact and the second wiring contact are respectively fixed on the first insulating column and the second insulating column, the first insulating column is provided with a movably connected knife rod, the knife rod is provided with an insulating handle, the insulating handle is provided with a handle hole for pulling, the insulating handle is fixed to the knife rod by bolts, the insulating handle is provided with a spring clamping device, the second wiring contact includes a limiting groove, and the limiting groove fits with the head of the knife rod.

[0007] The utility model is further configured as follows: the knife gate rod head is provided with an arc corner.

[0008] The utility model is further configured as follows: the limiting groove includes a high protrusion, a low protrusion A, and a low protrusion B; the waist of the low protrusion A is provided with a low-end groove; the low protrusion A and the low protrusion B are attached to both sides of the gate knife rod, and the high protrusion is close to the outside of the arc corner.

[0009] The utility model is further configured as follows: the spring clamping device includes a clamping rod, a linkage rod, a reset spring, and a stopper; the insulating handle is provided with a slide groove adapted to the stopper; and the stopper is arranged in the slide groove.

[0010] The utility model is further configured as follows: the clamping rod is provided with an arc protrusion, and the arc protrusion fits with the low-end groove.

[0011] The present invention is further configured as follows: the first insulating column and the second insulating column are provided with a shock absorbing device, and the shock absorbing device includes a rubber sleeve and a shock absorbing washer.

[0012] To sum up, the utility model has the following beneficial effects: the spring clamping device can conveniently clamp the limit groove, so that the contact between the wiring contact and the knife rod is not easy to loosen, the operation is convenient, and the connection is reliable; the head of the knife rod has an arc corner, which increases the contact surface between the knife rod and the second wiring contact, reduces the pressure on the contact surface when the second contact is impacted, and increases the service life.

[0013] The rubber sleeve of the shock-absorbing device can alleviate the lateral impact, and the shock-absorbing gasket in the shock-absorbing device can alleviate the longitudinal impact, thereby reducing the vibration received and reducing the fatigue of the insulating column caused by the impact and vibration, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of this embodiment;

[0015] Figure 2 Schematic diagram of the knife bar structure of this embodiment;

[0016] Figure 3 This is a cross-sectional view taken along the line AA of this embodiment;

[0017] Figure 4 This is a partial projection view of point B of this embodiment;

[0018] Figure numerals: 1. base; 2. first insulating column; 21. first wiring contact; 3. second insulating column; 31. second wiring contact; 4. knife rod; 41. insulating handle; 412. slide groove; 411. handle hole; 42. arc corner; 5. shock absorbing device; 51. rubber sleeve; 52. shock absorbing washer; 6. limiting groove; 61. high protrusion; 62. low protrusion A; 621. low end groove; 63. low protrusion B; 7. spring clamping device; 71. clamping rod; 711. arc protrusion; 72. linkage rod; 73. reset spring; 74. stop block. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings.

[0020] This embodiment discloses a double-column isolating switch, such as Figure 1 The present invention comprises a base 1, a first insulating column 2, a second insulating column 3, a first wiring contact 21, a second wiring contact 31, and a knife rod 4. The first insulating column 2 and the second insulating column 3 are respectively arranged on both sides of the base 1. The first wiring contact 21 and the second wiring contact 31 are respectively fixed on the first insulating column 2 and the second insulating column 3. The first insulating column 2 is provided with a movable knife rod 4. The knife rod 4 is provided with an insulating handle 41. The insulating handle 41 is fixed to the knife rod 4 by bolts. The insulating handle 41 is provided with a handle for pulling. The handle hole 411, when opening the knife rod 4, take out the long rod with a hook for auxiliary opening, pass the long rod with the hook through the handle hole 411 and pull it down, the isolating switch can be easily opened and closed. When an erroneous operation causes the isolating switch to be accidentally energized when opened and closed, the insulating handle 41 reduces the possibility of workers being injured by electric shock; the first insulating column 2 and the second insulating column 3 are provided with a shock absorbing device 5, and the shock absorbing device 5 can reduce the increase in impact received by the first insulating column 2 and the second insulating column 3, so that the first insulating column 2 and the second insulating column 3 are not easily damaged, thereby increasing the service life of the present invention.

[0021] like Figure 2 As shown, the head of the knife gate rod 4 is provided with an arc corner 42, the limiting groove 6 is matched with the head of the knife gate rod 4, and the head of the knife gate rod 4 can be placed in the limiting groove 6, and the limiting groove 6 includes a high protrusion 61, a low protrusion A62, and a low protrusion B63. The low protrusions A62 and B63 are fitted on both sides of the knife gate rod, and the high protrusion 61 is close to the outside of the arc corner; the setting of the high protrusion 61 limits the axial sliding friction between the knife gate rod 4 and the second wiring contact 31, thereby increasing the service life of the second wiring contact 31, and the setting of the arc corner increases the contact area between the knife gate rod 4 and the limiting groove 6, thereby increasing the stability of the connection; the corner increases the contact area between the knife gate rod 4 and the second wiring contact 31, which can reduce the pressure on the second wiring contact 31 when impacted, thereby increasing the service life of the second wiring contact 31.

[0022] like Figure 3 If locking sill 752 snap on the positioning plate 74 away from that locking mouth 714, that is, latch lock 7 is in the solid state of being locked together, and lock core 71 is in the solid state of being locked together.

[0023] like Figure 4 As shown, the shock absorbing device 5 includes a rubber sleeve 51 and a shock absorbing washer 52. The shock absorbing washer 52 is arranged inside the rubber sleeve 51. The rubber sleeve 51 of the shock absorbing device 5 absorbs and mitigates lateral impacts, while the shock absorbing washer 52 of the shock absorbing device 5 absorbs and mitigates longitudinal impacts, thereby reducing vibration in multiple directions, reducing fatigue of the insulating column caused by impact and vibration, and increasing its service life.

[0024] Working principle of the utility model

[0025] When opening the circuit breaker, confirm that the power is off, hold the long rod with a hook, extend the long rod with a hook into the handle hole 411 and hook the insulating handle 41 downward. The block 74 set in the slide groove 412 is also hooked, overcoming the elastic force of the reset spring 73, driving the linkage rod 72 to move, so that the clamping rod 71 is opened, the spring clamping device 7 is opened, and the knife rod 4 can move, so that the knife rod 4 can smoothly escape from the limit device, completing the opening of the circuit breaker.

[0026] When closing the circuit breaker, hold the long rod with a hook, insert the long rod with a hook into the handle hole 411, and use the long rod with a hook to push the insulating handle 41 upward to press the knife rod 4 into the limit groove 6. The arc protrusion 711 has an arc surface, so the process of pressing the knife rod 4 into the limit groove 6 is very smooth. The arc protrusion 711 enters the lower end groove 621 under the action of the elastic force of the reset spring 73, making the clamping effective and reliable, and completing the closing of the circuit breaker.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-column isolating switch, characterized in that: The invention comprises a base (1), a first insulating column (2), a second insulating column (3), a first wiring contact (21), a second wiring contact (31), and a knife gate rod (4); the first insulating column (2) and the second insulating column (3) are respectively arranged on both sides of the base (1); the first wiring contact (21) and the second wiring contact (31) are respectively fixed on the first insulating column (2) and the second insulating column (3); a knife gate rod (4) with a movable connection is provided on the first insulating column (2); an insulating handle (41) is provided on the knife gate rod (4); the insulating handle (41) is provided with a handle hole (411) for pulling; the insulating handle (41) and the knife gate rod (4) are fixed by bolts; a spring clamping device (7) is provided on the insulating handle (41); the second wiring contact (31) comprises a limiting groove (6); the limiting groove (6) is matched with the head of the knife gate rod (4); The spring clamping device (7) comprises a clamping rod (71), a linkage rod (72), a return spring (73), and a stopper (74); the insulating handle (41) is provided with a stopper (74) adapted to a slide groove (412); and the stopper (74) is arranged in the slide groove (412).

2. A double-column disconnector according to claim 1, characterized in that: The head of the knife gate rod (4) is provided with a circular arc corner (42).

3. A double-column disconnector according to claim 1, characterized in that: The limiting groove (6) comprises a high convex block (61), a low convex block A (62), and a low convex block B (63); the waist of the low convex block A (62) is provided with a low end groove (621); the low convex block A (62) and the low convex block B (63) are attached to both sides of the gate knife rod, and the high convex block (61) is close to the outside of the arc corner (42).

4. A double-column disconnector according to claim 1, characterized in that: The clamping rod (71) is provided with a circular arc protrusion (711), and the circular arc protrusion (711) is matched with the low-end groove (621).

5. The double-column disconnector according to claim 1, characterized in that: The first insulating column (2) and the second insulating column (3) are provided with a shock absorbing device (5), and the shock absorbing device (5) comprises a rubber sleeve (51) and a shock absorbing washer (52).

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