CN216288152U - Insulating pull rod and vacuum circuit breaker based on same - Google Patents

Abstract

The invention discloses an insulating pull rod and a vacuum circuit breaker based on the same. It includes the insulator and inserts down in the insulator, the inserts has the arrangement chamber down, it has the dish spring to settle the intracavity, the center of catch bar is provided with the through-hole, it has the locating lever still to settle the intracavity, thereby the lower extreme of catch bar stretches out and settles the intracavity and can make the catch bar keep away from the reference surface by the operating device drive and make the contact of contact in the arc extinguishing chamber in the reference surface, can directly obtain the contact opening when the contact in the arc extinguishing chamber, can directly obtain the contact stroke after the contact in the arc extinguishing chamber. After adopting above-mentioned structure, on the basis that can directly obtain the contact opening distance, can directly obtain the purpose of contact stroke, its simple ingenious structural design has simplified traditional measuring method greatly, has reduced the error that the human factor produced, has improved production efficiency, has reduced assembly workman's the amount of labour to the performance that the circuit breaker closed the separating brake has effectively been improved.

Description

Insulating pull rod and vacuum circuit breaker based on same

Technical Field

The invention relates to a high-voltage vacuum circuit breaker and an operation component structure thereof, in particular to an insulating pull rod and a vacuum circuit breaker based on the insulating pull rod.

Background

The insulating pull rod of the high-voltage vacuum circuit breaker is an insulating transmission part connected between a power output part device of an operating mechanism and a moving contact of a vacuum arc-extinguishing chamber, and the switching-on and switching-off operation stroke of the vacuum circuit breaker is usually obtained by measuring and calculating the relative position change of the insulating pull rod and related parts under different operation states. However, the conventional insulating pull rod can only measure the total stroke (contact opening distance + contact stroke) of the circuit breaker during installation and detection, cannot directly and independently measure the contact opening distance and the contact stroke, and needs to measure and calculate the contact opening distance and the contact stroke through an auxiliary method and complex auxiliary operation. The methods generally employed are: the method comprises the steps of firstly operating a crank arm of a circuit breaker through a manual operating rod to enable a movable conducting rod of a vacuum arc extinguish chamber to move, detecting that a movable contact and a fixed contact are just in a contact state through an instrument, then measuring a relative position value of a reference surface of an insulating pull rod at the moment through a caliper, then electrifying to enable the circuit breaker to be in a closing state and an opening state, measuring a corresponding value of the insulating pull rod, and then calculating the opening distance and the contact stroke of the contact.

Although the existing method can indirectly measure the contact opening distance and the contact stroke, the method is troublesome (at least two persons are matched), and a large error is generated; because the contact of the moving contact and the static contact of the vacuum arc-extinguishing chamber is controlled manually and a certain time is kept for a measuring person, the measured data can generate an error of 0.5-1mm due to different persons, the opening distance and the contact stroke of the contact in the high-voltage circuit breaker are important technical parameters, and the switching-on and switching-off performance judgment of the circuit breaker is seriously influenced by inaccurate measurement.

Disclosure of Invention

The invention aims to provide an insulating pull rod capable of reducing errors caused by human factors, improving production and detection efficiency and reducing the labor amount of assembly personnel and a vacuum circuit breaker based on the insulating pull rod.

In order to solve the technical problem, the insulating pull rod comprises an insulator at the middle section, an upper insert which can be connected with a contact part of a vacuum arc extinguish chamber is arranged at the upper part of the insulator, a lower insert which is embedded into the insulator is arranged at the lower part of the insulator, the lower insert is provided with a placement cavity for placing a push rod, the push rod which can move up and down in the placement cavity is placed in the placement cavity, a disc spring is arranged between the push rod and the top surface of the placement cavity, a through hole is formed in the center of the push rod, a positioning rod which extends out of the bottom end of the push rod from the through hole is fixedly arranged in the placement cavity, and the lower end of the push rod extends out of the placement cavity and can be connected with an action part of an operating mechanism.

An end cover is packaged at the opening of the placement cavity, and the upper half section of the push rod can be limited in the end cover and extend out of the end cover from the lower half section of the push rod.

The disc spring is sleeved on the upper half section of the push rod and pressed between the top surface of the placement cavity and the upper end surface of the limiting shoulder.

The locating rod is directly embedded on the insulator.

The positioning rod is connected to the lower insert through threads.

The utility model provides a vacuum circuit breaker based on foretell insulating pull rod, includes vacuum interrupter and has the insulating pull rod of inserts, catch bar and locating lever, the last inserts of insulating pull rod stretch into in the vacuum interrupter and can cooperate with vacuum interrupter's contact, and the insulating pull rod passes through fixed mounting's drive block on the catch bar and the crank arm of being connected with the drive block and is connected with the drive shaft to can make catch bar reciprocating motion realize vacuum interrupter's contact or disconnection under the drive of drive shaft.

The crank arm is installed through a pin shaft and can swing.

After the structure is adopted, the positioning rod extending out of the bottom end of the pushing rod from the through hole of the pushing rod is simply and skillfully fixedly arranged in the arrangement cavity, so that the contact stroke can be directly obtained by utilizing the distance of the positioning rod extending out of the bottom end of the pushing rod on the basis of directly obtaining the opening distance of the contact, the measuring mode is greatly simplified due to the simple and skillful structural design, an intermediate state is not required to be obtained through manual auxiliary operation in measurement, errors caused by human factors are reduced, the production efficiency is improved, the labor capacity of assembly workers is reduced, and the detection precision of the switching-on and switching-off performance of the circuit breaker is effectively improved; the insulating pull rod has the characteristics of novel structure, convenience in measurement, accurate data and the like, can be widely applied to the design of insulating pull rods in various circuit breakers, and has a wide application prospect.

Drawings

FIG. 1 is a schematic diagram of the open distance and contact stroke measurement indication states of the contact in the invention;

fig. 2 is a partial structural diagram of the vacuum circuit breaker based on the insulating pull rod in the opening state according to the present invention;

fig. 3 is a partial structural diagram of a closing state of the vacuum circuit breaker based on the insulating pull rod according to the present invention.

Detailed Description

The insulating pull rod and the vacuum circuit breaker based on the insulating pull rod of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

The first embodiment is as follows:

the insulating pull rod is mainly used for connecting a vacuum arc extinguish chamber and a swing arm in a circuit breaker, can be widely used in a ZN63A (VS 1) high-voltage vacuum circuit breaker, and can also be used in similar circuit breakers such as ZN85-40.5 and the like; as shown in fig. 1, the insulated pull rod of the present embodiment includes an insulator 2 at a middle section, an upper insert 1 capable of connecting a contact part of a vacuum interrupter is provided at an upper portion of the insulator 2, a lower insert 3 embedded in the insulator is provided at a lower portion of the insulator 2, a high voltage live part is isolated from a frame (reference surface) 13 by the insulator made of an insulating material, and the lower insert 3 has a housing cavity for housing a push rod 4; the upper half part of the pushing rod is arranged in the arranging cavity and can move up and down in the arranging cavity, meanwhile, the lower half part of the pushing rod 4 extends out of the arranging cavity, and a disc spring (disc spring) 5 is arranged between the pushing rod and the top surface of the arranging cavity, so that when the pushing rod is in contact with a contact of a vacuum arc-extinguishing chamber, contact pressure can be provided through the disc spring and buffering is carried out, and the bounce time of the contact is reduced; the center of the pushing rod 4 is provided with a through hole, a positioning rod 6 extending out of the bottom end of the pushing rod is fixedly arranged in the arranging cavity, wherein the positioning rod 6 can be directly embedded on the insulator 2 or connected on the lower insert 3 through threads or other modes to enable the positioning rod and the insulator to be integrated, the lower end (the lower half part) of the pushing rod extends out of the arranging cavity and can be connected with an action part of an operating mechanism, so that the pushing rod can be far away from a reference surface (a frame) to enable a contact in the vacuum arc-extinguishing chamber 1 to be contacted, when the contact in the vacuum arc-extinguishing chamber is contacted, a contact opening can be directly obtained through the movement distance between the bottom end of the pushing rod and a selected reference surface, as shown in figure 1, the contact opening H = H2-H1, after the contact in the vacuum arc-extinguishing chamber is contacted, the pushing rod can continue to move forwards, and a disc spring (a contact spring) is compressed, thereby produce the contact stroke to further increase contact pressure, the energy of storage, until the crank arm stop motion of circuit breaker, thereby realized making the pushing rod overcome the elasticity of dish spring and continue the action thereby utilize the locating lever 6 to stretch out the distance of pushing rod bottom directly to obtain the purpose of contact stroke, as shown in fig. 1, contact stroke C = C2-C1, wherein, the wearing and tearing of contact are compensatied to the main effect of contact stroke, in addition under the contact pressure effect, because the existence of contact stroke, can improve the rigid minute speed of explosion chamber moving contact, promptly: when the operating mechanism drives the push rod and the whole insulating pull rod through the action part to enable the contact in the vacuum arc extinguishing chamber to be contacted, the contact opening distance can be directly obtained through the movement distance between the bottom end of the push rod and the selected reference surface; after the contact in the arc extinguishing chamber is contacted, the pushing rod can overcome the elastic force of the disc spring to continue to act, so that the positioning rod further extends out of the bottom end face of the pushing rod, and the distance of the positioning rod extending out of the bottom end of the pushing rod can be measured to directly obtain a contact stroke.

Through the structural design, only need be through respectively giving the closing coil and the separating brake coil power transmission of circuit breaker, can make the circuit breaker be in keeping closing, separating brake two kinds of states, under these two kinds of states, just can measure the relevant data under closing and separating brake two kinds of states alone, H1, H2, C1, C2, and through formula H = H2-H1 and C = C2-C1, calculate contact opening range and contact stroke respectively, no longer need make the explosion chamber be in just closing state through manual alone, thereby human error has been eliminated, the data accuracy has been improved, installer quantity and the amount of labour have been reduced, labor efficiency has been improved.

Furthermore, an end cover 8 is packaged at the opening of the placement cavity, the upper half section of the push rod 4 can be limited in the end cover, and the lower half section of the push rod can extend out of the end cover, specifically, a limiting shoulder 9 positioned on the inner side of the end cover 8 is arranged on the push rod 4, and the disc spring 5 is sleeved on the upper half section of the push rod 4 and pressed between the top surface of the placement cavity and the upper end surface of the limiting shoulder 9.

Example two:

a vacuum circuit breaker based on an insulated pull rod of an embodiment I comprises a vacuum arc-extinguishing chamber and the insulated pull rod of the embodiment I with an upper insert 1, a push rod 4 and a positioning rod 6, wherein the upper insert 1 of the insulated pull rod extends into the vacuum arc-extinguishing chamber and can be matched with a contact of the vacuum arc-extinguishing chamber, the insulated pull rod is connected with a driving shaft 12 (forming an action part of an operating mechanism) through a driving block (steering pin) 10 fixedly arranged at the lower end of the push rod 4 and a connecting lever 11 connected with the driving block, the connecting lever 11 is arranged through a pin shaft and can realize swinging action, so that the push rod 4 can reciprocate under the driving of the driving shaft to realize the contact with the contact of the vacuum arc-extinguishing chamber 7, namely the insulated pull rod can transmit the motion and the energy of a disc spring to the contact of the vacuum arc-extinguishing chamber through the driving block (steering pin) 10, the connecting lever and the driving shaft, the contact can move at a certain speed, and after the insulating pull rod is connected with the movable conducting rod on the contact of the vacuum arc-extinguishing chamber of the circuit breaker, the moving distance of the insulating pull rod is equal to the moving distance of the movable conducting rod, and after the movable and fixed contacts of the vacuum arc-extinguishing chamber are contacted, the push rod can continue to move upwards under the action of the driving shaft, so that a contact stroke is generated.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims (7)

1. The utility model provides an insulating pull rod, includes insulator (2) in middle section, its characterized in that: insulator upper portion has last inserts (1) that can connect vacuum interrupter's contact part, and the lower part of insulator (2) has lower inserts (3) of embedding in the insulator, inserts (3) have the settling chamber that is used for settling catch bar (4) down, settle the intracavity and settle and have and to move from top to bottom in settling chamber catch bar (4), install dish spring (5) between catch bar (4) and the settling chamber top surface, the center of catch bar (4) is provided with the through-hole, settling chamber still fixed mounting has locating lever (6) of stretching out the catch bar bottom in following the through-hole, and the lower extreme of catch bar (4) stretches out and settles the chamber outside and can connect operating device's action part.

2. The insulating tie of claim 1, wherein: an end cover (8) is packaged at the opening of the placement cavity, and the upper half section of the push rod (4) can be limited in the end cover and extend out of the end cover from the lower half section.

3. The insulated draw bar of claim 2, wherein: the push rod (4) is provided with a limiting shoulder (9) positioned on the inner side of the end cover (8), and the disc spring (5) is sleeved on the upper half section of the push rod and pressed between the top surface of the placement cavity and the upper end surface of the limiting shoulder.

4. An insulating tie rod according to claim 1, 2 or 3, wherein: the positioning rod (6) is directly embedded on the insulator (2).

5. An insulating tie rod according to claim 1, 2 or 3, wherein: the positioning rod (6) is connected to the lower insert (3) through threads.

6. The utility model provides a vacuum circuit breaker based on insulating pull rod which characterized in that: including vacuum interrupter and have the insulating pull rod of going up inserts (1), catch bar (4) and locating lever (6), the last inserts (1) of insulating pull rod stretch into in the arc extinguish chamber and can cooperate with the contact of arc extinguish chamber, the insulating pull rod passes through drive block (10) of fixed mounting on catch bar (4) and is connected with drive shaft (12) with crank arm (11) that the drive block is connected to can make catch bar (4) reciprocating motion realize the contact or the disconnection of vacuum interrupter (7) under the drive of drive shaft (12).

7. The insulated draw bar-based vacuum interrupter of claim 6, wherein: the crank arm is installed through a pin shaft and can swing.

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