Outdoor high-voltage circuit breaker

Abstract

The utility model relates to the technical field of power equipment, and specifically discloses an outdoor high-voltage circuit breaker. Comprising a mechanism box, a high-voltage circuit breaker body arranged on the mechanism box, a safety mechanism arranged in the mechanism box and used for controlling opening and closing of the high-voltage circuit breaker body, and a pressure pipeline mechanism arranged in the mechanism box and used for monitoring internal pressure of the high-voltage circuit breaker body. A gas supply mechanism which is communicated with the high-voltage circuit breaker body and is used for supplying sulfur hexafluoride gas is also arranged in the mechanism box, and comprises a gas supply tank arranged in the mechanism box, a gas supply pipe of which the two ends are communicated with the gas supply tank and the high-voltage circuit breaker body respectively, and a pressure switch arranged in the gas supply pipe; the problems that in the long-term use process of a traditional sulfur hexafluoride circuit breaker, sulfur hexafluoride gas needs to be supplemented for multiple times, and gas leakage and gas leakage are likely to happen are solved.

Description

Technical Field

[0001] This application relates to the technical field of power equipment, and specifically discloses an outdoor high-voltage circuit breaker. Background Art

[0002] A high-voltage circuit breaker plays a control role in a high-voltage circuit and is one of the important electrical components in a high-voltage circuit. A high-voltage circuit breaker can not only cut off or close the no-load current and load current in a high-voltage circuit, but also cut off the overload current and short-circuit current through the action of a relay protection device when a system failure occurs. It has a quite perfect arc extinguishing structure and sufficient breaking capacity, and can be divided into: oil circuit breakers, sulfur hexafluoride circuit breakers, compressed air circuit breakers, vacuum circuit breakers, etc.

[0003] Now, regarding the sulfur hexafluoride circuit breaker commonly used in the prior art, a sulfur hexafluoride circuit breaker is a circuit breaker that uses sulfur hexafluoride gas as an arc extinguishing medium and an insulating medium, and a sulfur hexafluoride circuit breaker is often used as an outdoor high-voltage circuit breaker. Although a density relay is provided inside a traditional sulfur hexafluoride circuit breaker to monitor the leakage of sulfur hexafluoride gas, and a pressure switch and a safety valve are provided to monitor the pressure of a hydraulic mechanism to protect the safety of the hydraulic system, so as to achieve the sealing effect of sulfur hexafluoride gas.

[0004] However, during the long-term use of a sulfur hexafluoride circuit breaker and during the arc extinguishing process of opening and breaking, some sulfur hexafluoride gas will liquefy or be lost during use. Therefore, it is necessary to supplement the sulfur hexafluoride gas inside the sulfur hexafluoride circuit breaker after a certain period of use. However, in the prior art, the supplementation of sulfur hexafluoride gas is completed manually at regular intervals. The content of sulfur hexafluoride gas will be shown by the installed density relay, and the sulfur hexafluoride gas is supplemented manually to reach the rated pressure. However, during each manual supplementation process, a pipeline needs to be connected to the pipeline structure and flange of the sulfur hexafluoride circuit breaker, and in the process of long-term multiple operations, air leakage and air leakage are likely to occur.

[0005] Therefore, in view of this, the inventor provides an outdoor high-voltage circuit breaker to solve the above problems. Summary of the Utility Model

[0006] The purpose of the present utility model is to solve the problem that during the long-term use of a traditional sulfur hexafluoride circuit breaker, it is necessary to supplement the sulfur hexafluoride gas multiple times, and air leakage and air leakage are likely to occur.

[0007] To achieve the above object, the basic solution of the present utility model provides an outdoor high-voltage circuit breaker, which includes a mechanism box, a high-voltage circuit breaker body provided on the mechanism box, a safety mechanism provided in the mechanism box and used to control the opening and closing of the high-voltage circuit breaker body, and a pressure pipeline mechanism provided in the mechanism box and used to monitor the internal pressure of the high-voltage circuit breaker body. An air supply mechanism that is respectively connected to the high-voltage circuit breaker body and used to supply sulfur hexafluoride gas is also provided in the mechanism box. The air supply mechanism includes an air supply tank provided in the mechanism box, an air supply pipe with both ends respectively connected to the air supply tank and the high-voltage circuit breaker body, and a pressure switch provided in the air supply pipe.

[0008] Further, the air supply tank is connected with a pipeline connector, and both ends of the air supply pipe are respectively connected between the pipeline connector and the high-voltage circuit breaker body.

[0009] Further, the pressure switch is provided in the air supply pipe extending into the high-voltage circuit breaker body.

[0010] Further, the pressure pipeline mechanism includes a pressure measuring pipe with one end extending into the high-voltage circuit breaker body, an air inlet part connected to the top end of the pressure measuring pipe, and a density relay connected to the bottom end of the pressure measuring pipe.

[0011] Further, the height of the top end of the air supply pipe extending into the high-voltage circuit breaker body is higher than the height of the air inlet part.

[0012] Further, a wiring terminal is provided at the top of the high-voltage circuit breaker body, a fixed conductive structure connected to the wiring terminal is provided inside, and a moving conductive structure controlled by the safety mechanism and capable of lifting inside the high-voltage circuit breaker body to connect to the fixed conductive structure is provided.

[0013] The principle and effect of this solution are as follows:

[0014] 1. Compared with the prior art, the present utility model is provided with a pressure pipeline mechanism to detect the sulfur hexafluoride gas content in the high-voltage circuit breaker body. When the sulfur hexafluoride gas content changes, it will be intuitively shown by the pressure pipeline mechanism.

[0015] 2. Compared with the prior art, the present utility model is also provided with an air supply mechanism for supplying and supplementing sulfur hexafluoride gas to the high-voltage circuit breaker body. When the sulfur hexafluoride gas pressure in the high-voltage circuit breaker body drops to a certain threshold, the pressure switch is turned on, and the air supply mechanism supplies sulfur hexafluoride gas to the high-voltage circuit breaker body and closes after reaching a certain threshold.

[0016] 3. Compared with the prior art, the utility model uses a gas supply mechanism to supplement sulfur hexafluoride gas to the main body of the high-voltage circuit breaker. When part of the sulfur hexafluoride gas is lost during the long-term use of the high-voltage circuit breaker, it can be directly supplemented through the gas supply mechanism. A single gas supply mechanism can achieve multiple gas supplies. Only by replacing the gas supply mechanism, there is no need to loosen or tighten the pipeline connected to the main body of the high-voltage circuit breaker, and the sulfur hexafluoride gas in the main body of the high-voltage circuit breaker will not escape during maintenance, solving the problem that in the process of long-term use of traditional sulfur hexafluoride circuit breakers, multiple supplements of sulfur hexafluoride gas are required, and air leakage and gas leakage are likely to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 FIG. shows a schematic diagram of an outdoor high-voltage circuit breaker proposed in an embodiment of the present application;

[0019] Figure 2 FIG. shows a partial schematic diagram of an outdoor high-voltage circuit breaker proposed in an embodiment of the present application;

[0020] Figure 3 FIG. shows a partial schematic diagram of an outdoor high-voltage circuit breaker proposed in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific embodiments, structures, features and their effects of the present utility model as follows.

[0022] The reference numerals in the accompanying drawings of the specification include: mechanism box 1, density relay 2, gas supply tank 3, terminal 4, insulating nozzle 5, gas supply pipe 6, fixed arc contact 7, fixed main contact 8, fixed seal 9, moving arc contact 10, moving main contact 11.

[0023] An outdoor high-voltage circuit breaker, as shown in the embodiment Figure 1 as follows:

[0024] It includes an institutional box 1, three groups of high-voltage circuit breaker bodies installed on the institutional box 1, a safety mechanism installed on the institutional box 1 and connected to the three groups of high-voltage circuit breaker bodies to control the opening and closing of the high-voltage circuit breaker bodies, three groups of pressure pipeline mechanisms installed in the institutional box 1 for monitoring the internal pressure of the high-voltage circuit breaker bodies, and a gas supply mechanism installed in the institutional box 1 and respectively communicated with the high-voltage circuit breaker bodies for supplying sulfur hexafluoride gas.

[0025] The gas supply mechanism includes a gas supply tank 3 installed in the institutional box 1, three gas supply pipes 6 respectively connected between the gas supply tank 3 and the high-voltage circuit breaker bodies, and three pressure switches respectively installed in the gas supply pipes 6. An air outlet for discharging the internal high-pressure sulfur hexafluoride gas is opened on the gas supply tank 3, and a pipeline connector, specifically a four-way pipeline connector, is installed at the air outlet of the gas supply tank 3. One end of the gas supply pipe 6 is connected to a hole of the four-way pipeline connector, and the other end of the gas supply pipe 6 respectively extends from the bottom end of the high-voltage circuit breaker body into the high-voltage circuit breaker body.

[0026] As Figure 3 shown, in this embodiment, the pressure switch is arranged in the gas supply pipe 6 extending into the high-voltage circuit breaker body. The pressure pipeline mechanism includes a pressure measuring pipe with its top end extending into the high-voltage circuit breaker body, an air inlet part communicated with the pressure measuring pipe extending to the top end of the high-voltage circuit breaker body, and a density relay 2 communicated with the bottom end of the pressure measuring pipe. Each group of high-voltage circuit breaker bodies is separately connected to a density relay 2. And the top end height of the gas supply pipe 6 extending into the high-voltage circuit breaker body is higher than the height of the air inlet part.

[0027] As Figure 2 shown, a wiring terminal 4 is installed on the top of the high-voltage circuit breaker body, a fixed conductive structure connected to the wiring terminal 4 is installed on the inner top, and a moving conductive structure controlled by the safety mechanism and capable of lifting in the high-voltage circuit breaker body to connect the fixed conductive structure is installed below the fixed conductive structure. In this embodiment, the installed safety mechanism is a mechanism commonly used in the prior art for controlling the opening and closing of high-voltage circuit breakers.

[0028] The fixed conductive structure includes a fixed arc contact 7 installed in the high-voltage circuit breaker, a fixed main contact 8 coaxially installed outside the fixed arc contact 7, and a fixed seal 9 installed between the fixed arc contact 7 and the fixed main contact 8. The moving conductive structure includes a moving arc contact 10 installed in the high-voltage circuit breaker body and controlled by the safety mechanism, a moving main contact 11 sleeved outside the moving arc contact 10, and an insulating nozzle 5 fixedly installed on the top of the moving main contact 11 and sleeved outside the moving arc contact 10. A connecting piece is installed between the moving main contact 11 and the moving arc contact 10, and a cylinder shaft is installed outside the moving main contact 11.

[0029] Among them, an inclined annular groove is formed inside the top end of the insulating nozzle 5, and an inclined annular platform that can fit with the inclined annular groove is integrally formed at the bottom end of the fixed closing member 9. When the moving main contact 11 and the moving arc contact 10 are lifted upward, the fixed arc contact 7 extends into the moving arc contact 10. The insulating nozzle 5 is placed between the fixed main contact 8 and the fixed arc contact 7 and fits inside. When it extends to the top end, the inclined annular groove fits with the inclined annular platform, completely isolating the fixed arc contact 7 from the sulfur hexafluoride gas outside.

[0030] When the present utility model is in use, when the content of sulfur hexafluoride gas inside the high-voltage circuit breaker body changes, it is visually shown by the density relay 2. When the content of sulfur hexafluoride gas inside a certain high-voltage circuit breaker body is lower than the set threshold of the pressure switch, the pressure switch installed in the corresponding gas supply pipe 6 is opened to supplement sulfur hexafluoride gas inside the high-voltage circuit breaker body, and the pressure switch closes after reaching a certain threshold.

[0031] When the sulfur hexafluoride gas is partially lost during the long-term use of the high-voltage circuit breaker of the present utility model, it can be directly supplemented through the gas supply mechanism. A single gas supply mechanism can achieve multiple gas supplies. Only by replacing the gas supply mechanism, there is no need to loosen the pipelines connected to the high-voltage circuit breaker body, and the sulfur hexafluoride gas inside the high-voltage circuit breaker body will not escape during maintenance, solving the problem that in the long-term use process of traditional sulfur hexafluoride circuit breakers, multiple supplements of sulfur hexafluoride gas are required, and air leakage and gas leakage are likely to occur.

[0032] The above are only the preferred embodiments of the present utility model and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An outdoor high-voltage circuit breaker, comprising a mechanism box, a high-voltage circuit breaker body arranged on the mechanism box, a safety mechanism arranged in the mechanism box and used to control the opening and closing of the high-voltage circuit breaker body, and a pressure pipeline mechanism arranged in the mechanism box and used to monitor the internal pressure of the high-voltage circuit breaker body, characterized in that: The mechanism box is also provided with a gas supply mechanism which is connected with the high-voltage circuit breaker body and is used to supply sulfur hexafluoride gas. The gas supply mechanism includes a gas supply tank arranged in the mechanism box, a gas supply pipe whose two ends are respectively connected with the gas supply tank and the high-voltage circuit breaker body, and a pressure switch arranged in the gas supply pipe.

2. An outdoor high-voltage circuit breaker according to claim 1, characterized in that: The gas supply tank is connected with a pipeline connector, and two ends of the gas supply pipe are respectively connected between the pipeline connector and the high-voltage circuit breaker body.

3. An outdoor high-voltage circuit breaker according to claim 2, characterized in that: The pressure switch is arranged in the gas supply pipe extending into the high-voltage circuit breaker body.

4. An outdoor high-voltage circuit breaker according to claim 3, characterized in that: The pressure pipeline mechanism comprises a pressure measuring tube with one end extending into the high-voltage circuit breaker body, an air inlet connected to the top of the pressure measuring tube and a density relay connected to the bottom of the pressure measuring tube.

5. An outdoor high-voltage circuit breaker according to claim 4, characterized in that: The top end of the air supply pipe extending into the high-voltage circuit breaker body is higher than the height of the air inlet member.

6. An outdoor high-voltage circuit breaker according to claim 1, characterized in that: The high-voltage circuit breaker body is provided with a connection terminal on the top, a fixed conductive structure connected with the connection terminal and a movable conductive structure controlled by a safety mechanism and capable of rising and falling in the high-voltage circuit breaker body to connect with the fixed conductive structure are provided inside.

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