CN205354944U - High pressure vacuum circuit breaker and monopole thereof - Google Patents

Abstract

The utility model discloses a high-voltage vacuum circuit breaker and its single pole, wherein the single pole of the circuit breaker includes an insulating cylinder, a vacuum interrupter located in the insulating cylinder, an upper terminal board located above the insulating cylinder and a Pressure contact compression spring, vacuum interrupter and insulating cylinder are guided and moved up and down, and contact compression spring is located between the static end of the vacuum interrupter and the upper terminal board and is in a pre-compressed state or a natural elongation state. The single pole of the high-voltage vacuum circuit breaker of the utility model sets the contact pressure spring used to increase the contact force between the contacts when closing the switch between the static end of the vacuum interrupter and the upper wiring board, and the circuit breaker opens and closes. , the contact pressure spring only participates in the movement in the overtravel part, which reduces the operating work of the circuit breaker compared with the contact pressure spring that participates in the whole process of opening and closing at the moving end of the arc extinguishing chamber in the prior art.

Description

High voltage vacuum circuit breaker and its single pole

technical field

The utility model relates to a high-voltage vacuum circuit breaker and a single pole thereof.

Background technique

The vacuum circuit breaker includes a vacuum interrupter. The shell of the vacuum interrupter is a hollow structure, and the conductive rod equipped with a static contact is penetrated through the static end of the vacuum interrupter. The other end of the conductive rod of the moving contact with the moving contact is loaded. During the closing process, the moving contact and the static contact in the vacuum interrupter collide with each other. The conduction between the dynamic and static contacts of the vacuum interrupter adopts flat plate contact. In order to ensure good contact and small resistance, the high-voltage vacuum circuit breaker uses a contact pressure spring to provide the pressure between the contacts in the single-pole closing state.

The contact pressure springs of the existing products are all arranged at the movable end of the vacuum interrupter. As a part of the movement, the contact pressure spring assembly participates in the opening and closing process throughout the whole process. The movement mass is large, resulting in excessive operation work of the vacuum circuit breaker. For example, Chinese patent CN201749817U (authorized announcement date is 2011.02.16) discloses a split-type insulating pull rod device for a solid-sealed indoor high-voltage vacuum circuit breaker. On the connecting rod and tighten it with nuts.

Contents of the invention

The purpose of this utility model is to provide a single-pole high-voltage vacuum circuit breaker to solve the technical problem of excessive operating power of the vacuum circuit breaker caused by the contact spring in the existing circuit breaker being arranged at the moving end of the arc extinguishing chamber. At the same time, the utility model also provides a high-voltage vacuum circuit breaker comprising the single pole of the circuit breaker.

In order to achieve the above purpose, the technical scheme of the single pole of the medium and high voltage vacuum circuit breaker of the present invention is as follows: the single pole of the high voltage vacuum circuit breaker includes an insulating cylinder, a vacuum interrupter located in the insulating cylinder, an upper terminal board located above the insulating cylinder and For the contact compression spring to increase the pressure between the contacts, the vacuum interrupter and the insulating cylinder are guided and moved up and down, and the contact compression spring is set between the static end of the vacuum interrupter and the upper terminal board and is in pre-compression state or natural elongation state.

The upper wiring board is provided with an arc extinguishing chamber guide rod for guiding the movement of the vacuum interrupting chamber.

The upper terminal board is electrically connected to the static end of the vacuum interrupter through a conductive component, the conductive component includes a static terminal conductive sleeve electrically connected to the upper terminal board, and the upper terminal board is provided with a static terminal for installation Mounting holes for conductive sleeves.

The conductive component includes watchband contact fingers located between the static end conductive sleeve and the upper wiring board.

The single pole of the high-voltage vacuum circuit breaker also includes a lower terminal board and a soft connection assembly arranged between the lower terminal board and the moving end of the vacuum interrupter, the soft connection assembly includes a conductive block electrically connected to the moving end of the vacuum interrupter, The conductive block is provided with an arc extinguishing chamber guide sleeve, and the lower end of the vacuum interrupter is guided up and down and assembled on the arc extinguishing chamber guide sleeve.

The insulating barrel includes an upper insulating barrel and a lower insulating barrel, and the lower wiring board is located between the upper insulating barrel and the lower insulating barrel.

The technical scheme of the utility model high-voltage vacuum circuit breaker is as follows: the vacuum circuit breaker includes a high-voltage vacuum circuit breaker monopole, a high-voltage vacuum circuit breaker monopole, including an insulating cylinder, a vacuum interrupter located in the insulating cylinder, and a vacuum interrupter located above the insulating cylinder. The upper terminal board and the contact pressure spring used to increase the pressure between the contacts, the vacuum interrupter and the insulating cylinder are guided and moved up and down, and the contact pressure spring is arranged between the static end of the vacuum interrupter and the upper terminal board and in a pre-compressed state.

The upper wiring board is provided with an arc extinguishing chamber guide rod for guiding the movement of the vacuum interrupting chamber.

The upper terminal board is electrically connected to the static end of the vacuum interrupter through a conductive component, the conductive component includes a static terminal conductive sleeve electrically connected to the upper terminal board, and the upper terminal board is provided with a static terminal for installation Mounting holes for conductive sleeves.

The single pole of the high-voltage vacuum circuit breaker also includes a lower terminal board and a soft connection assembly arranged between the lower terminal board and the moving end of the vacuum interrupter, the soft connection assembly includes a conductive block electrically connected to the moving end of the vacuum interrupter, The conductive block is provided with an arc extinguishing chamber guide sleeve, and the lower end of the vacuum interrupter is guided up and down and assembled on the arc extinguishing chamber guide sleeve.

Beneficial effects of the utility model: The single pole of the high-voltage vacuum circuit breaker of the utility model sets the contact pressure spring used to increase the contact force between the contacts when closing the switch between the static end of the vacuum interrupter and the upper terminal board. When the circuit breaker opens and closes, the contact pressure spring only participates in the movement in the overtravel part. Compared with the contact pressure spring in the prior art that participates in the whole process of opening and closing at the moving end of the arc extinguishing chamber, the circuit breaker is reduced. The operating power of the device.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model high-voltage vacuum circuit breaker;

Fig. 2 is a schematic diagram of the first state of the utility model high-voltage vacuum circuit breaker in the closing process;

Fig. 3 is a schematic diagram of the second state of the utility model high-voltage vacuum circuit breaker in the closing process;

Fig. 4 is a schematic diagram of another three states of the high-voltage vacuum circuit breaker of the present invention in the closing process.

detailed description

Embodiment of the utility model high-voltage vacuum circuit breaker: as shown in Figure 1-4, the high-voltage vacuum circuit breaker includes a three-phase high-voltage vacuum circuit breaker monopole, and each phase circuit breaker monopole includes an insulating cylinder, a vacuum located in the insulating cylinder The arc extinguishing chamber 5, the upper wiring board 3 located above the insulating cylinder and the contact pressure spring 4 for increasing the pressure between the contacts. The vacuum interrupter 5 and the insulating cylinder are guided and moved up and down, and the contact pressure spring 4 is set between the static end of the vacuum interrupter and the upper terminal board 3 and is in a pre-compressed state.

The upper wiring board 3 is provided with an arc extinguishing chamber guide rod 2 for guiding the movement of the vacuum interrupting chamber. The upper wiring board 3 is electrically connected to the static end of the vacuum interrupter through a conductive component, the conductive component includes the static end conductive sleeve 1, and the upper wiring board 3 is provided with a mounting hole for installing the static end conductive sleeve. The conductive component includes watchband contact fingers located between the static end conductive sleeve 1 and the upper wiring board 3, and conducts electricity through the watchband contact fingers. In the middle of the upper wiring board 3, a downwardly protruding stop is provided at the installation hole, and the installation hole runs through the stop. The upper end of the contact pressure spring 4 is pressed against the lower end of the stopper, and is sheathed on the conductive sleeve 1 at the static end.

The single-pole high-voltage vacuum circuit breaker also includes a lower terminal board 8 and a soft connection assembly arranged between the lower terminal board 8 and the moving end of the vacuum interrupter. The soft connection assembly includes a conductive block 13 electrically connected to the moving end of the vacuum interrupter. , The conductive block 13 is provided with an arc extinguishing chamber guide sleeve 6, and the lower end of the vacuum interrupter 5 is guided up and down and assembled on the arc extinguishing chamber guide sleeve 6. The insulating cylinder includes an upper insulating cylinder 14 and a lower insulating cylinder 12 , and the lower wiring board 8 is located between the upper insulating cylinder 14 and the lower insulating cylinder 12 . The movable end conductive rod 9 is inserted on the conductive block 13 through the movable end conductive sleeve 7 , and a strap contact finger is also arranged between the movable end conductive sleeve 7 and the conductive block 13 . The lower end of the moving end conductive rod 9 is hingedly connected with an insulating pull rod 10 . The lower end of the insulating pull rod 10 is connected with the transmission crank arm 11 through a connecting rod. The transmission arm 11 belongs to a part of the operating mechanism of the circuit breaker, and controls the opening and closing of the dynamic and static contacts of the circuit breaker through the action of the operating mechanism.

Assume that the opening distance of the vacuum interrupter is a, and the overtravel is cc. Take the circuit breaker as an example. The sleeve distance is d, and the distance from the static end of the vacuum interrupter to the bottom of the upper terminal board is a1. With the rotation of the crank arm, push the insulating rod to drive the moving end of the arc extinguishing chamber to close. When it reaches the just closing point, as shown in Figure 3, the distance between the conductive sleeve of the moving end and the lower terminal board is s2, s2=s1+a, and the vacuum extinguishing The distance from the arc chamber to the guide sleeve of the arc extinguishing chamber is d, and the distance from the static end to the bottom of the upper wiring board is a1, and the overtravel has not yet occurred at this time. The crank arm continues to rotate, and the vacuum interrupter starts to compress the contact pressure spring to realize the overtravel cc, as shown in Figure 4, the distance between the moving end conductive sleeve and the lower terminal board is s3, s2=s1+a+cc, and the vacuum interrupter reaches The distance from the guide sleeve of the arc extinguishing chamber is d1=d+cc, and the distance from the static end to the bottom of the upper terminal board is a2=a1-cc. The head pressure spring moves overtravel cc together, because the moving mass increases more and the speed drops faster, which can effectively alleviate the impact at the later stage of closing.

In other embodiments, a flexible connection can also be used to realize electrical connection between the upper wiring board and the static end of the vacuum interrupter. The guide rod used for guiding the vacuum interrupter can be arranged on the upper end of the interrupter or on the upper wiring board. A guide block can also be provided inside the insulating cylinder, and corresponding guide holes for the arc extinguishing chamber to pass up and down are provided on the guide block.

In other embodiments, the contact compression spring can also be in a state of natural elongation between the static end of the vacuum interrupter and the upper wiring board, and the contact compression spring can meet the use requirements when the stiffness is relatively large.

In the embodiment of the monopole of the high-voltage vacuum circuit breaker of the present invention, the structure of the monopole of the high-voltage vacuum circuit breaker is the same as the structure of the monopole of the circuit breaker in the above-mentioned embodiment of the high-voltage vacuum circuit breaker, and will not be described in detail.

Claims (10)

1. Single-pole high-voltage vacuum circuit breaker, including an insulating cylinder, a vacuum interrupter located in the insulating cylinder, an upper terminal board located above the insulating cylinder, and a contact compression spring for increasing the pressure between the contacts. It is characterized in that: The vacuum interrupter and the insulating cylinder are guided and moved up and down, and the contact pressure spring is arranged between the static end of the vacuum interrupter and the upper terminal board and is in a pre-compressed state or a naturally extended state. 2. The single-pole high voltage vacuum circuit breaker according to claim 1, characterized in that: said upper terminal board is provided with an arc extinguishing chamber guide rod for guiding the movement of said vacuum interrupter. 3. The single-pole high-voltage vacuum circuit breaker according to claim 1, characterized in that: the upper terminal board is electrically connected to the static end of the vacuum interrupter through a conductive component, and the conductive component includes an upper wiring connected electrically The conductive sleeve at the static end on the board, and the upper wiring board is provided with a mounting hole for installing the conductive sleeve at the static end. 4. The single-pole high-voltage vacuum circuit breaker according to claim 3, characterized in that: the conductive component includes strap contacts located between the static end conductive sleeve and the upper wiring board. 5. The single-pole high-voltage vacuum circuit breaker according to any one of claims 1 to 4, characterized in that: the single-pole high-voltage vacuum circuit breaker also includes a lower terminal board and a joint between the lower terminal board and the vacuum interrupter. The soft connection assembly between the ends, the soft connection assembly includes a conductive block electrically connected to the moving end of the vacuum interrupter, the conductive block is provided with an arc extinguisher guide sleeve, and the lower end of the vacuum interrupter is guided up and down and assembled on the Install the guide sleeve of the arc extinguishing chamber. 6 . The single-pole high voltage vacuum circuit breaker according to claim 5 , wherein the insulating cylinder comprises an upper insulating cylinder and a lower insulating cylinder, and the lower terminal board is located between the upper insulating cylinder and the lower insulating cylinder. 7. A high-voltage vacuum circuit breaker, including a single-pole high-voltage vacuum circuit breaker, is characterized in that: a single-pole high-voltage vacuum circuit breaker includes an insulating cylinder, a vacuum interrupter located in the insulating cylinder, an upper terminal board located above the insulating cylinder, and For the contact compression spring to increase the pressure between the contacts, the vacuum interrupter and the insulating cylinder are guided and moved up and down, and the contact compression spring is set between the static end of the vacuum interrupter and the upper terminal board and is in pre-compression state. 8. The high voltage vacuum circuit breaker according to claim 7, characterized in that: said upper terminal board is provided with an arc extinguishing chamber guide rod for guiding the movement of said vacuum interrupting chamber. 9. The high-voltage vacuum circuit breaker according to claim 7, characterized in that: the upper terminal board is electrically connected to the static end of the vacuum interrupter through a conductive component, and the conductive component includes a The conductive sleeve at the static end, and the upper wiring board is provided with a mounting hole for installing the conductive sleeve at the static end. 10. The high-voltage vacuum circuit breaker according to any one of claims 7 to 9, characterized in that: the single pole of the high-voltage vacuum circuit breaker also includes a lower terminal board and a terminal between the lower terminal board and the moving end of the vacuum interrupter. The soft connection assembly between the two, the soft connection assembly includes a conductive block electrically connected to the moving end of the vacuum interrupter, the conductive block is provided with an arc extinguisher guide sleeve, and the lower end of the vacuum interrupter is guided up and down and assembled on the arc extinguisher chamber guide.