CN220456294U - Combined breaker isolation knife assembly - Google Patents

Abstract

The utility model belongs to the technical field of power distribution equipment, and particularly relates to a combined breaker isolation knife assembly. The device comprises a solid sealing pole, an insulating pull rod assembly, an isolating knife assembly, an isolating shaft assembly and a sensor assembly; the fixed and sealed polar post is fixed on the frame, and the tail end of the fixed and sealed polar post is provided with a conducting rod; the isolating knife assembly comprises a copper flexible connection, a supporting seat, an isolating knife rotating shaft, an isolating block and an isolating knife; the insulation pull rod assembly comprises a connecting rotating shaft, a connecting rod and an insulation pull rod, and the isolation block is connected with the connecting rod through the connecting rotating shaft; the isolating shaft assembly comprises a crank arm, an isolating shaft, a limiting plate, a hanging spring plate, an in-spring supporting rod and an isolating shaft pressing spring, wherein the crank arm is connected with the insulating pull rod, the limiting plate is fixed on the isolating shaft and connected with the in-spring supporting rod, and the outside of the in-spring supporting rod is provided with the isolating shaft pressing spring and is fixed with the frame through the hanging spring plate. The utility model has the advantages of convenient assembly, simple structure and strong overall stability.

Description

Combined breaker isolation knife assembly

Technical Field

The utility model belongs to the technical field of power distribution equipment, and particularly relates to a combined breaker isolation knife assembly.

Background

The circuit breaker product adopts vacuum arc extinction, and vacuum explosion chamber is sealed by epoxy and is formed solid sealed utmost point post, and wall-through solid sealed utmost point post adopts horizontal installation, and the utmost point post moves the end and links to each other with the terminal that is qualified for the next round of competitions through soft coupling, and the utmost point post static end links to each other with the movable knife fulcrum of isolating knife to cut apart isolating knife and earthing switch into two independent compartments, ensure that the circuit breaker overhauls under the electroless state. Isolation sword and earthing switch manual operation mechanism: the isolating knife is switched on anticlockwise; the grounding switch Guan Shun is switched on, and the isolating knife, the circuit breaker and the grounding switch are provided with perfect five-prevention interlocking, which comprises a warning interlocking plate with a programmed operation instruction, wherein the interlocking plate slides up and down and only exposes one operation hole at each position, so that only one switch operation of the isolating knife, the circuit breaker and the grounding switch can be realized at each position, and misoperation is thoroughly avoided.

The existing isolating knife of the combined circuit breaker mainly has two schemes: the first scheme is that the support base is connected with the solid-sealed polar pole, copper isolation blades are arranged on two sides of the support base and are fixed through screws and disc springs, the isolation knife is prevented from inclining, the tail of the isolation knife is fixed through the clamping plates, deformation and the like of the tail of the isolation knife are prevented, and the two isolation blades are fixed through the connecting rotating shaft, the connecting rod and the insulating pull rod, so that the action of the isolation knife is realized. The scheme is mainly for the product that a large amount of use in present market, and copper isolation sword is longer relatively, and head and tail need use dish spring and pressure spring to carry out tight fixed pressure, and intermediate junction pivot and connecting rod are as main action transfer point, and the in-process of realizing isolation sword subassembly divide-shut brake appears the slope about easily and can't the condition of putting on a floodgate in place, and long-term use supporting seat and isolation sword appear not hard up easily, and the resistance between isolation sword and the utmost point post increases, and the wholeness can decline, moreover with high costs. The second scheme is that the supporting seat is connected with the solid sealed pole, the isolation block is processed by adopting an integral aluminum block, two isolation cutters are connected to two sides of the tail of the isolation block, the tail of the isolation cutter is fixed by adopting a clamping plate, the tail of the isolation cutter is prevented from deforming, and the like, a waist hole is needed to be drawn out in the middle of the isolation block to facilitate connection of a connecting rod and a connecting rotating shaft, so that the opening and closing function of the isolation cutter assembly is realized, but the integral cost of the scheme is high, the isolation cutter assembly is heavy and is not beneficial to manual opening and closing operation, and the clamping blocks on two sides of the isolation block easily cause too tight contact pressure to be unable to close a gate.

Disclosure of Invention

The utility model provides a combined breaker isolation knife assembly which is simple in structure, strong in overall stability, durable and not easy to deform.

The utility model relates to a combined breaker isolation knife assembly, which comprises a solid sealing pole, an insulating pull rod assembly, an isolation knife assembly, an isolation shaft assembly and a sensor assembly, wherein the solid sealing pole is fixedly connected with the insulating pull rod assembly; the fixed and sealed polar post is fixed on the frame, and the tail end of the fixed and sealed polar post is provided with a conducting rod; the isolating knife assembly comprises a copper flexible connection, a supporting seat, an isolating knife rotating shaft, an isolating block and an isolating knife, and the conducting rod is connected with the copper flexible connection and the supporting seat; the insulation pull rod assembly comprises a connecting rotating shaft, a connecting rod and an insulation pull rod, and the isolation block is connected with the connecting rod through the connecting rotating shaft; the isolating shaft assembly comprises a crank arm, an isolating shaft, a limiting plate, a hanging spring plate, an in-spring supporting rod and an isolating shaft pressing spring, wherein the crank arm is connected with the insulating pull rod, the limiting plate is fixed on the isolating shaft and connected with the in-spring supporting rod, and the outside of the in-spring supporting rod is provided with the isolating shaft pressing spring and is fixed with the frame through the hanging spring plate.

Preferably, the isolation block is milled with a waist hole, and the connecting rotating shaft of the insulating pull rod is connected with the isolation block through the waist hole for rotation.

Preferably, one side of the supporting seat is connected with the isolating block through the isolating knife rotating shaft, and the other side of the supporting seat is connected with the conducting rod by soft copper.

Preferably, the copper flexible connection and the isolation block are fixedly connected through a flexible connection fixing screw.

Preferably, the sensor assembly comprises a connection row, a sensor and a sensor mounting plate, the connection row being mounted on the sensor, the sensor being fixed on the sensor mounting plate and on the frame.

Preferably, the isolation block is an aluminum profile square tube.

Preferably, the isolating knife is arranged at the tail part of the isolating block.

Preferably, the end part of the isolating knife is provided with an end part shaft sleeve, one end of the end part shaft sleeve is provided with a contact pressure spring, and the contact pressure spring and the isolating knife are connected through an end part screw.

The isolation knife assembly of the combined circuit breaker is convenient to assemble, simple in structure and high in overall stability; copper flexible connection conduction is adopted, so that the safety is high and the cost can be reduced; the isolation block is an aluminum profile square pipe, so that the structure is compact, and the transmission is stable.

Drawings

FIG. 1 is a diagram showing the state of the disconnecting link of the whole structure assembly of the isolating blade of the present utility model;

FIG. 2 is a schematic diagram of the overall motion structure of the isolation knife of the present utility model;

FIG. 3 is an assembly view of the spacer of the present utility model;

FIG. 4 is a schematic diagram of the installation of the spacer of the present utility model;

FIG. 5 is a closing state diagram of the whole structure assembly of the isolating blade of the present utility model;

wherein: 1 solid-sealed pole, 11 breaker side, 13 pole fixing screw, 14 isolation side, 15 conducting rod, 2 frame, 3 insulating pull rod component, 31 connecting shaft, 32 connecting rod, 33 insulating pull rod, 4 isolating knife component, 41 copper flexible connection, 42 supporting seat, 43 flexible connection fixing screw, 44 isolating knife rotating shaft, 45 isolating block, 46 isolating knife, 47 end screws, 48 contact pressure springs, 49 end shaft sleeves, 5 isolating shaft assemblies, 51 hanging spring plates, 52 sprung support rods, 53 isolating shaft pressure springs, 54 crank arms, 55 isolating shafts, 56 limiting plates, 6 sensor assemblies, 61 connecting row fixing screws, 62 connecting rows, 63 sensors, 64 mounting plate fixing screws and 65 sensor mounting plates.

Detailed Description

The technical solutions of the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the isolating blade assembly of the combined circuit breaker according to the present utility model comprises a solid sealing pole 1, an insulating pull rod assembly 3, an isolating blade assembly 4, an isolating shaft assembly 5 and a sensor assembly 6. The encapsulated pole 1 is fixed to the frame 2 by pole fixing screws 13, the frame 2 acting as the main fixing base, the circuit breaker being divided by the frame 2 into a breaker side 11 and an isolation side 14. The tail end of the solid-sealed pole 1 is provided with a conducting rod 15, and the isolating knife assembly 4 comprises a copper flexible connection 41, a supporting seat 42, an isolating knife rotating shaft 44, an isolating block 45 and an isolating knife 46. The isolation block 45 is an aluminum profile square tube. As shown in fig. 3-4, the conductive rod 15 is connected with the copper flexible connection 41 and the supporting seat 42, and is fixed by a screw, the copper flexible connection 41 is mainly used for conducting electricity, and meanwhile, is in direct contact with the conductive rod 15 for conducting electricity; the copper flexible connection 41 and the isolation block 45 are fixedly connected through the flexible connection fixing screw 43 to conduct electricity. The supporting seat 42 is connected with the isolating block 45 through the isolating knife rotating shaft 44 to realize the rotating function, and meanwhile, the supporting seat 42 is connected to the conducting rod 15 through a screw to play a role of tightening the copper flexible connection 41.

The insulation pull rod assembly 3 comprises a connecting rotating shaft 31, a connecting rod 32 and an insulation pull rod 33, the isolation block 45 is milled with a waist hole, the isolation block is connected with the connecting rod 32 through the connecting rotating shaft 31 to rotate, the tail part of the connecting rod 32 is provided with a threaded precession insulation pull rod 33, and the isolation block is fixed through nut locking. The tail part of the isolation block 45 is provided with an isolation knife 46 and is fixed by a screw; the end part of the isolating knife 46 is provided with an end part shaft sleeve 49 for supporting, and the end part screw 47 passes through the end part shaft sleeve 49 and uses a contact pressure spring 48 to perform pressure pre-tightening on one side of the isolating knife 46, so that the contact pressure can reach a required stable value.

The isolating shaft assembly 5 comprises a crank arm 54, an isolating shaft 55, a limiting plate 56, a hanging spring plate 51, an in-spring supporting rod 52 and an isolating shaft pressing spring 53, wherein the crank arm 54 of the isolating shaft assembly 5 is connected with the insulating pull rod 33 and is fixed on the isolating shaft 55 at the same time and has a fixed relative angle; a limiting plate 56 is fixed on the isolating shaft 55, so that the opening angle of the isolating knife is ensured to be fixed in the opening process, and the situation that the isolating knife assembly cannot be closed again after opening is prevented; the limiting plate 56 is connected with the spring inner supporting rod 52, the limiting plate is connected with the spring inner supporting rod 52 through a shaft, an isolating shaft pressing spring 53 is arranged on the outer side of the spring inner supporting rod 52, the spring inner supporting rod 52 is fixed with the hanging spring plate 51 through a pin, and the hanging spring plate 51 is fixed with the frame 2 through a screw.

The sensor assembly 6 comprises a connection row 62, a sensor 63 and a sensor mounting plate 65, the connection row 62 being mounted on the sensor 63 by means of a connection row fixing screw 61, the sensor 63 being fixed on the sensor mounting plate 65 and being fixed to the frame 2 by means of a mounting plate fixing screw 64. As shown in fig. 5, the isolating blade 46 is switched on to the connection bank 62 for switching on.

The utility model relates to a working principle of an isolation knife assembly of a combined circuit breaker, which comprises the following steps:

the opening and closing of the isolating knife are manually operated, the isolating shaft 55 is rotated by using tool rotation, and the crank arm 54 is driven to rotate at the same time; the crank arm 54 drives the isolating blade assembly 4 to move through the insulating pull rod assembly 3, so that the isolating blade 46 contacts the sensor assembly 6 to perform opening and closing actions. When the isolating knife is switched on and off, the rotating angle of the switch on and off is controlled through a limiting plate 56 on the isolating shaft 55, the in-spring supporting rod 52 and the isolating shaft pressing spring 53; the initial angular position and the closing position of the isolating blade assembly 4 are controlled by the connecting rod 32.

The above description is only of the preferred embodiments of the present application and the description of the technical principles applied, and it should be understood by those skilled in the art that the scope of the utility model in the present application is not limited to the specific combination of the technical features described above, but also covers other technical solutions formed by any combination of the technical features described above or the equivalent thereof without departing from the inventive concept.

Claims (8)

1. The isolation knife assembly of the combined circuit breaker is characterized by comprising a solid sealing pole, an insulating pull rod assembly, an isolation knife assembly, an isolation shaft assembly and a sensor assembly; the fixed and sealed polar post is fixed on the frame, and the tail end of the fixed and sealed polar post is provided with a conducting rod; the isolating knife assembly comprises a copper flexible connection, a supporting seat, an isolating knife rotating shaft, an isolating block and an isolating knife, and the conducting rod is connected with the copper flexible connection and the supporting seat; the insulation pull rod assembly comprises a connecting rotating shaft, a connecting rod and an insulation pull rod, and the isolation block is connected with the connecting rod through the connecting rotating shaft; the isolating shaft assembly comprises a crank arm, an isolating shaft, a limiting plate, a hanging spring plate, an in-spring supporting rod and an isolating shaft pressing spring, wherein the crank arm is connected with the insulating pull rod, the limiting plate is fixed on the isolating shaft and connected with the in-spring supporting rod, and the outside of the in-spring supporting rod is provided with the isolating shaft pressing spring and is fixed with the frame through the hanging spring plate.

2. The isolating blade assembly of claim 1, wherein the isolating block is milled with a waist hole, and the connecting shaft of the insulating pull rod is connected with the isolating block for rotation through the waist hole.

3. The isolating blade assembly of claim 1, wherein the support base is connected to the isolating block on one side by an isolating blade shaft and to the conducting rod on the other side by a soft copper connection.

4. The combination circuit breaker isolation knife assembly of claim 1, wherein the copper flexible connection and the isolation block are fixedly connected by a flexible connection set screw.

5. The combination circuit breaker isolation blade assembly of claim 1, wherein the sensor assembly comprises a connection row, a sensor, and a sensor mounting plate, the connection row being mounted on the sensor, the sensor being secured to the sensor mounting plate and to the frame.

6. The isolating blade assembly of claim 1, wherein the isolating block is an aluminum profile square tube.

7. The combination circuit breaker isolation blade assembly of claim 1, wherein the isolation blade is disposed at a tail of the isolation block.

8. The isolating blade assembly of claim 7, wherein the isolating blade has an end sleeve with a contact compression spring at one end and a connection to the contact compression spring and the isolating blade is made through an end screw.