阅读说明：本技术 一种真空断路器 (Vacuum circuit breaker ) 是由 许万涛 迟鹏飞 谢立军 张作钦 辛状状 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种真空断路器,包括支撑绝缘子和绝缘推杆,支撑绝缘子的内腔包括上内腔和下内腔,上内腔和下内腔之间设有绝缘分隔单元,绝缘分隔单元密封套设在绝缘推杆上与上内腔和下内腔分别密封连接；绝缘分隔单元包括安装结构和绝缘分隔体,安装结构设置在支撑绝缘子的内腔的侧壁上,绝缘分隔体分别与安装结构和绝缘推杆连接。本发明将支撑绝缘子的内腔分隔为上下独立的上内腔和下内腔,同时,绝缘分隔单元套设在绝缘推杆上,也与绝缘推杆密封连接,因此,不论是外部杂质进入支撑绝缘子的内腔,或是磨损物落入支撑绝缘子的内腔,都只会进入上内腔中,不会形成对地放电,这样就保证了真空断路器具有良好的高压绝缘性能和工作可靠性能。(The invention discloses a vacuum circuit breaker, which comprises a supporting insulator and an insulating push rod, wherein an inner cavity of the supporting insulator comprises an upper inner cavity and a lower inner cavity, an insulating separation unit is arranged between the upper inner cavity and the lower inner cavity, and the insulating separation unit is arranged on the insulating push rod in a sealing way and is respectively connected with the upper inner cavity and the lower inner cavity in a sealing way; the insulating partition unit comprises a mounting structure and an insulating partition body, the mounting structure is arranged on the side wall of the inner cavity of the supporting insulator, and the insulating partition body is connected with the mounting structure and the insulating push rod respectively. The invention divides the inner cavity of the supporting insulator into an upper inner cavity and a lower inner cavity which are independent up and down, and meanwhile, the insulating separation unit is sleeved on the insulating push rod and is also in sealing connection with the insulating push rod, so that no matter external impurities enter the inner cavity of the supporting insulator or abrasion falls into the inner cavity of the supporting insulator, the external impurities only enter the upper inner cavity and can not form earth discharge, and the vacuum circuit breaker is ensured to have good high-voltage insulating performance and reliable working performance.)

1. The utility model provides a vacuum circuit breaker, includes support insulator and insulating push rod, its characterized in that: the inner cavity of the supporting insulator comprises an upper inner cavity and a lower inner cavity, an insulating separation unit is arranged between the upper inner cavity and the lower inner cavity, and the insulating separation unit is hermetically sealed and arranged on the insulating push rod and is respectively and hermetically connected with the upper inner cavity and the lower inner cavity.

2. A vacuum interrupter as claimed in claim 1, characterized in that:

the insulating separation unit comprises a mounting structure and an insulating separation body, the mounting structure is arranged on the side wall of the inner cavity of the supporting insulator, and the insulating separation body is connected with the mounting structure and the insulating push rod respectively.

3. A vacuum interrupter as claimed in claim 2, characterized in that:

the mounting structure comprises an annular boss which protrudes out of the side wall of the inner cavity of the supporting insulator along the radial direction, a mounting groove is formed in the end face of one protruding side of the annular boss, and the circumferential edge of one end of the insulating separator is embedded into the mounting groove.

4. A vacuum interrupter as claimed in claim 3, characterized in that:

the circumferential edge of the insulating separator is embedded into the mounting groove where the upper inner cavity side and the lower inner cavity side are filled with an adhesive respectively.

5. A vacuum interrupter as claimed in claim 2 or 3, characterized in that:

the annular boss and the side wall of the inner cavity of the supporting insulator are integrally formed.

6. A vacuum interrupter according to any one of claims 2 to 5, wherein:

the insulating separator is a flexible insulator;

preferably, the insulating separator is a silicone rubber material.

7. A vacuum interrupter as claimed in claim 6, characterized in that:

the insulating separator is of a corrugated sleeve-shaped structure and is fixedly connected with the insulating push rod.

8. A vacuum interrupter as claimed in claim 6, characterized in that:

the edge of the fixed connection between the insulating separator and the insulating push rod is filled with adhesive.

9. A vacuum interrupter according to any one of claims 1 to 8, wherein: still including the explosion chamber insulator that has the explosion chamber inner chamber, the explosion chamber insulator with support insulator sealing connection, insulating push rod passes from bottom to top in proper order lower inner chamber go up the inner chamber with the explosion chamber inner chamber.

10. A vacuum interrupter as claimed in claim 9, wherein:

the arc extinguishing chamber is characterized in that a static contact is arranged in the inner cavity of the arc extinguishing chamber, a moving contact is arranged at the upper end of the insulating push rod, and two states are arranged between the static contact and the moving contact, including a static contact and moving contact closed state and a static contact and moving contact separated state.

Technical Field

The invention belongs to the technical field of circuit switch equipment, and particularly relates to a vacuum circuit breaker.

Background

The vacuum circuit breaker is suitable for various electric locomotives and train sets, is arranged on the top covers of the locomotives and the motor trains or in the high-voltage boxes, is the most important switching device and protection equipment on the locomotives and the motor trains, has important insulating property and directly influences the reliable operation of the trains. When various serious faults occur to the vehicle, the vacuum circuit breaker can quickly, reliably and safely cut off the main power supply of the vehicle, thereby protecting the electrical equipment of the vehicle. The vacuum circuit breaker is characterized by single-fracture cylinder transmission and electric control, and uses vacuum as insulating medium and arc-extinguishing medium, and utilizes the dissociation-removing action formed by high insulating strength and arc diffusion capacity in vacuum state to implement arc-extinguishing.

In the prior art, the outdoor structure vacuum circuit breaker arranged on the roof of the railway vehicle is greatly influenced by the external operating environment. In rainy and humid weather, when the sealing between the arc extinguish chamber insulator and the inner cavity insulator of the vacuum circuit breaker is poor, external water vapor or impurities can enter the inner cavity of the insulator, the high-voltage insulation performance of equipment is reduced, and even high voltage can be caused to puncture and discharge to the ground in serious conditions, so that the normal operation of a train is influenced, and further the train parking accident is caused.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a vacuum circuit breaker, aiming at separating an inner cavity of an insulator into two independent cavities and completely separating an upper inner cavity from the ground, thereby avoiding water vapor and sundries from entering a lower inner cavity due to poor sealing and ensuring that a VCB has good insulating property.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a vacuum circuit breaker, includes supporting insulator and insulating push rod, and the inner chamber of supporting insulator includes inner chamber and lower inner chamber, goes up the inner chamber and is equipped with insulating unit of separating down between the inner chamber, and insulating unit seal cover of separating is established on insulating push rod and is connected with last inner chamber and lower inner chamber sealing respectively.

In the above scheme, the inner cavity of the supporting insulator is divided into the upper inner cavity and the lower inner cavity which are independent from each other, and meanwhile, the insulating division unit is sleeved on the insulating push rod and is also in sealing connection with the insulating push rod, so that no matter external impurities enter the inner cavity of the supporting insulator or abrasion falls into the inner cavity of the supporting insulator, the external impurities only enter the upper inner cavity and cannot form ground discharge, and the vacuum circuit breaker is guaranteed to have good high-voltage insulating performance and working reliability.

Further, in the above-mentioned case,

the insulating partition unit comprises a mounting structure and an insulating partition body, the mounting structure is arranged on the side wall of the inner cavity of the supporting insulator, and the insulating partition body is connected with the mounting structure and the insulating push rod respectively.

Further, in the above-mentioned case,

the mounting structure comprises an annular boss which protrudes out of the side wall of the inner cavity of the supporting insulator along the radial direction, a mounting groove is formed in the end face of one protruding side of the annular boss, and the circumferential edge of one end of the insulating separator is embedded into the mounting groove.

Further, in the above-mentioned case,

the circumferential edge is embedded into the mounting groove and is positioned on the upper inner cavity side and the lower inner cavity side, and adhesive is filled in the upper inner cavity side and the lower inner cavity side respectively.

Further, in the above-mentioned case,

the annular boss and the side wall of the inner cavity of the supporting insulator are integrally formed.

In the above scheme, the inner chamber of the supporting insulator adopts a 'concave' type groove structure, so that the corrugated sleeve-shaped insulating separator is embedded into the mounting groove and is glued on the circumferential full-contact surface, the insulating separator is ensured not to fall off, and meanwhile, the sealing performance between the upper inner chamber and the lower inner chamber is effectively improved.

Further, in the above-mentioned case,

the insulating separator is a flexible insulator;

preferably, the insulating separator is a silicone rubber material.

Further, in the above-mentioned case,

the insulating separating body is of a corrugated sleeve-shaped structure and is fixedly connected with the insulating push rod.

In the above scheme, the insulating separator is of a corrugated sleeve-shaped structure and is fixedly connected with the insulating push rod. When the insulating push rod reciprocates under the drive of the transmission cylinder, the bellows-shaped structure enables the length of the insulating separating body to be extensible or shortened, so that one end of the insulating separating body also reciprocates along with the insulating push rod, the bellows made of silicon rubber is adopted, the material has good insulating property, and the reliability of the operation of the vacuum circuit breaker is ensured through 30 ten thousand times of action fatigue tests.

Further, in the above-mentioned case,

the edge of the fixed connection between the insulating separator and the insulating push rod is filled with adhesive.

Furthermore, the arc extinguish chamber comprises an arc extinguish chamber insulator with an arc extinguish chamber inner cavity, the arc extinguish chamber insulator is connected with the supporting insulator in a sealing mode, and the insulating push rod sequentially penetrates through the lower inner cavity, the upper inner cavity and the arc extinguish chamber inner cavity from bottom to top.

Further, in the above-mentioned case,

a static contact is arranged in an inner cavity of the arc extinguishing chamber, a moving contact is arranged at the upper end of the insulating push rod, and two states are arranged between the static contact and the moving contact, including a closed state of the static contact and the moving contact and a separated state of the static contact and the moving contact.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. The invention divides the inner cavity of the supporting insulator into an upper inner cavity and a lower inner cavity which are independent up and down, and meanwhile, the insulating separation unit is sleeved on the insulating push rod and is also in sealing connection with the insulating push rod, so that no matter external impurities enter the inner cavity of the supporting insulator or abrasion falls into the inner cavity of the supporting insulator, the external impurities only enter the upper inner cavity and can not form earth discharge, and the vacuum circuit breaker is ensured to have good high-voltage insulating performance and reliable working performance.

2. The inner cavity of the supporting insulator adopts a concave groove structure, so that the corrugated sleeve-shaped insulating separating body is embedded into the mounting groove and is glued on the circumferential full contact surface, the insulating separating body is ensured not to fall off, and meanwhile, the sealing performance between the upper inner cavity and the lower inner cavity is effectively improved.

3. The insulating separator is of a corrugated sleeve-shaped structure and is fixedly connected with the insulating push rod. When the insulating push rod reciprocates under the drive of the transmission cylinder, the bellows-shaped structure enables the length of the insulating separating body to be extensible or shortened, so that one end of the insulating separating body also reciprocates along with the insulating push rod, the bellows made of silicon rubber is adopted, the material has good insulating property, and the reliability of the operation of the vacuum circuit breaker is ensured through 30 ten thousand times of action fatigue tests.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic view of the structure of a vacuum circuit breaker according to the present invention;

fig. 2 is a schematic view of the operating principle of the vacuum circuit breaker of the present invention;

FIG. 3 is a schematic view of the structure of the insulating partition unit of the present invention;

in the figure: 1. a support insulator; 2. an insulating push rod; 3. an upper inner cavity; 4. a lower inner cavity; 5. an insulating partition unit; 6. an arc extinguishing chamber insulator; 7. a vacuum tube; 8. a transmission cylinder; 9. a high-voltage outlet terminal; 10. a high-voltage wire inlet end; 11. an annular boss; 12. installing a groove; 13. an adhesive; 14. nylon cable ties; 15. a base; 16. a first flange; 17. a second flange; 18. water vapor.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, the present invention provides a vacuum circuit breaker, which includes a supporting insulator 1 and an insulating push rod 2, wherein an inner cavity of the supporting insulator 1 includes an upper inner cavity 3 and a lower inner cavity 4, an insulating separation unit 5 is disposed between the upper inner cavity 3 and the lower inner cavity 4, and the insulating separation unit 5 is hermetically sleeved on the insulating push rod 2 and is hermetically connected with the upper inner cavity 3 and the lower inner cavity 4, respectively.

In detail, as shown in fig. 1, the main components of the vacuum circuit breaker include an arc extinguish chamber insulator 6, a supporting insulator 1, a vacuum tube 7, an insulating push rod 2, a base 15, a transmission cylinder 8, and the like. The transmission cylinder 8 is arranged in the base 15, the supporting insulator 1 is connected with the cylinder in a sealing way, and preferably, the supporting insulator 1 is assembled with the transmission cylinder 8 through a first flange 16. The upper end of the supporting insulator 1 is hermetically connected with the arc extinguish chamber insulator 6, and preferably, the upper end of the supporting insulator 1 is structurally assembled with the arc extinguish chamber insulator 6 through a second flange 17, and the flange structure is used for being connected with a high-voltage outlet terminal 9. A vacuum tube 7 as a main circuit connector is mounted in the interrupter insulator 6, and the upper end of the interrupter insulator 6 is also provided with a flange structure for connection with a high voltage inlet terminal 10. One end of the insulating push rod 2 is connected with the cylinder, the other end of the insulating push rod penetrates through the inner cavity of the supporting insulator 1 and extends into a vacuum tube 7 in the arc extinguish chamber insulator 6, a moving contact is arranged at one end of the insulating push rod 2 in the vacuum tube 7, and a static contact is further arranged in the vacuum tube 7. The static contact keeps still, and insulating push rod 2 transmission is up-and-down reciprocating motion under the effect of cylinder, drives the moving contact up-and-down reciprocating motion, and contact with the static contact or part, realizes vacuum circuit breaker's break-make function.

When the coil of the electromagnetic valve on the vehicle side is electrified, the electromagnetic valve is enabled to be conducted in the positive direction of the air supply path of the electromagnetic valve, compressed air quickly enters the transmission cylinder 8 to drive the piston to move, the movable contact is driven by the insulating push rod 2 to move upwards and be closed with the fixed contact, and the closing process is completed.

When the coil of the electromagnetic valve at the vehicle side loses power, the exhaust path at the electromagnetic valve side is conducted, compressed air in the transmission cylinder 8 is quickly exhausted, the insulating push rod 2 retracts to drive the moving contact to move downwards and quickly separate from the static contact, and the brake separating process is completed.

However, since the vacuum circuit breaker is installed outside the roof of the rail vehicle, the circuit switch in the outdoor structure is greatly influenced by the external operating environment, and when the structure of the second flange 17 between the arc extinguish chamber insulator 6 and the support insulator 1 is not sealed well in rainy and humid weather, external moisture 18 or impurities can enter the inner cavity of the support insulator 1, as shown in fig. 2. Because the second flange 17 is provided with the high-voltage outlet 9 having high voltage, when water vapor 18 or impurities enter the inner cavity of the supporting insulator 1, the water vapor 18 or impurities with high voltage will have high voltage due to contact with the high-voltage outlet 9, and once the water vapor 18 or impurities with high voltage fall into the low-voltage part below the supporting insulator 1, the ground discharge will be caused. In addition, the wear produced by the action of the mechanism in the cavity of the upper arcing chamber insulator 6 will also fall to the bottom surface of the cavity of the support insulator 1. Therefore, whether external moisture 18 or impurities enter the inner cavity of the supporting insulator 1 or abrasion falls into the inner cavity of the supporting insulator 1, the high-voltage insulation performance of the equipment is reduced, and even high-voltage ground breakdown discharge can be caused in severe cases, so that the normal operation of the train is influenced.

According to the invention, the insulating separation unit 5 is arranged in the inner cavity of the supporting insulator 1, the inner cavity of the supporting insulator 1 is separated into the upper inner cavity 3 and the lower inner cavity 4 which are independent up and down, meanwhile, the insulating separation unit 5 is sleeved on the insulating push rod 2 and is also connected with the insulating push rod 2 in a sealing manner, so that the upper inner cavity 3 is in a suspended state substantially, and no matter external impurities enter the inner cavity of the supporting insulator 1 or abrasion objects fall into the inner cavity of the supporting insulator 1, the external impurities only enter the upper inner cavity 3, and the upper inner cavity 3 is suspended and isolated from the ground, so that ground discharge cannot be formed, and the vacuum circuit breaker is ensured to have good high-voltage insulating performance and reliable working performance.

Specifically, as shown in fig. 3, the insulating partition unit 5 includes a mounting structure provided on a side wall of the inner cavity of the support insulator 1 and an insulating partition body connected to the mounting structure and the insulating push rod 2, respectively.

In the above solution, the insulating separator plays a major role in isolating the upper cavity 3 from the lower cavity 4. In order to enhance the insulating properties of the insulating separator, the insulating separator is provided as a flexible insulator; preferably, the insulating separator is a silicone rubber material.

Furthermore, the insulating separating body is of a corrugated sleeve-shaped structure and is fixedly connected with the insulating push rod 2. When the insulating push rod 2 reciprocates under the drive of the transmission cylinder 8, the bellows-like structure makes the length of the insulating partition extendable or contractible, so that one end of the insulating partition also reciprocates along with the insulating push rod 2.

The corrugated sleeve made of the silicon rubber is adopted, the good insulating property of the material is utilized, and the reliability of the operation of the vacuum circuit breaker is ensured through 30 ten thousand times of action fatigue tests.

However, since the material of the side wall of the inner cavity of the support insulator 1 is different from the material of the insulating partition, the insulating partition is mounted in the inner cavity of the support insulator 1 by a mounting structure ensuring that the insulating partition is mounted in the inner cavity of the support insulator 1 such that the upper inner cavity 3 and the lower inner cavity 4 are completely sealed.

In detail, the mounting structure comprises an annular boss 11, the annular boss 11 protrudes from the side wall of the inner cavity of the supporting insulator 1 along the radial direction, a mounting groove 12 is formed in the end face of the protruding side of the annular boss 11, and the circumferential edge of one end of the insulating separator is embedded into the mounting groove 12.

The lower end of the insulating separator adopting the silicon rubber corrugated sleeve-shaped structure is of a disc-shaped structure, and the circumferential edge of the disc-shaped structure is embedded into the mounting groove 12, so that the stability of the insulating separator in the inner cavity of the supporting insulator 1 is effectively improved.

Further, the circumferential edge embedding mounting groove 12 is filled with an adhesive 13 on the upper cavity 3 side and the lower cavity 4 side, respectively.

Further, the annular boss 11 is integrally formed with the side wall of the inner cavity of the support insulator 1.

In the above scheme, the inner cavity of the supporting insulator 1 adopts a concave groove structure, so that the corrugated sleeve-shaped insulating separator is embedded into the mounting groove 12 and is glued on the circumferential full contact surface, and the insulating separator is ensured not to fall off.

Further, the edge of the insulation separator fixedly connected with the insulation push rod 2 is filled with an adhesive 13.

In the above scheme, the insulating partition body cover of ripple cover form is established on insulating push rod 2, the upper end passes through nylon ribbon 14 locking fixed, and it is sticky firm with adhesive 13, furthermore, ensure that insulating partition body can not drop, effectively improve simultaneously and go up inner chamber 3 and lower inner chamber 4 between the sealing performance, when making outside impurity get into the inner chamber of supporting insulator 1, and when wearing and tearing thing fell into the inner chamber of supporting insulator 1, all can only get into in inner chamber 3, and can not fall into lower inner chamber 4, influence vacuum circuit breaker's high-voltage insulation performance.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.