Emergency voltage buildup device of pneumatic mechanism circuit breaker

Abstract

The utility model discloses an emergency voltage buildup device for a pneumatic mechanism circuit breaker. The emergency voltage buildup device comprises an air compressor, a condenser, an air cylinder and a driving motor, the driving motor is connected with the air compressor through a belt transmission piece; the air compressor, the condenser and the air cylinder are sequentially connected through a pipeline; an outlet pipe is arranged at the top of the cylinder; the outlet pipe is used for being connected with an air system of the pneumatic mechanism circuit breaker, and a port matched with the air system of the pneumatic mechanism circuit breaker is arranged at the joint of the outlet pipe and the pneumatic mechanism circuit breaker. According to the emergency voltage buildup device for the pneumatic mechanism circuit breaker provided by the utility model, when an air system of the pneumatic mechanism circuit breaker has a defect, the air system of the pneumatic mechanism circuit breaker is subjected to emergency voltage buildup and pressure maintaining, a traditional power failure defect elimination mode is converted into a non-power-failure operation mode, the defect processing time is shortened, and the operation and maintenance cost is reduced; and the method has remarkable social and economic benefits and popularization and application values.

Description

Technical Field

[0001] This utility model relates to the field of emergency equipment for circuit breakers, specifically an emergency pressure-building device for a pneumatic circuit breaker. Background Technology

[0002] In modern power systems, 220kV hub substations serve as the core hubs of the power transmission network, bearing the crucial responsibility of safely and stably distributing high-voltage electricity to various areas. Pneumatic circuit breakers, as one of the key pieces of equipment, are widely used in the incoming and outgoing line bays of 220kV hub substations due to their unique working principle and superior performance. Driven by compressed air, pneumatic circuit breakers precisely perform opening and closing operations, ensuring the normal operation of the power system and rapid disconnection during faults, playing a vital role in guaranteeing the safety and reliability of the power grid.

[0003] Currently, many pneumatic circuit breakers in operation in China (such as models LW26-126 and LW11-220) were put into operation around 2000, exceeding 20 years of service life, and the problem of equipment aging is becoming increasingly prominent. With the passage of time and long-term operation, air system defects in pneumatic circuit breakers are frequent. Issues such as leaks in the compressed air storage tank and its piping system, and aging air compressor performance can lead to insufficient air pressure. If the pressure drops to the blocking value, the circuit breaker may fail to open or close, resulting in temporary emergency shutdowns of the circuit. Power outages for parts replacement can also cause prolonged circuit outages, seriously endangering circuit operation safety, affecting equipment operation safety and power supply reliability. Some defects even constitute critical defects requiring immediate attention; otherwise, they may cause irreparable damage to the power system. The traditional method for handling air system defects in pneumatic circuit breakers involves power outage troubleshooting, a complex and time-consuming process. It requires multiple steps, including power outage operations, work permit processing, parts preparation, and on-site inspection, with an average processing time exceeding 6 hours. This process not only causes power outages, affecting the reliability of electricity supply for users, but also increases operation and maintenance costs (such as manpower, time, and losses due to power outages), resulting in huge economic losses for power companies. Furthermore, frequent power outages and restorations accelerate the wear and tear on circuit breaker mechanical components and air compressors, further shortening equipment lifespan. Although some improvements have been made in existing technologies (such as optimizing air compressor performance and strengthening sealing tests), their core remains reliant on power outage maintenance, failing to fundamentally solve the problem of low defect handling efficiency.

[0004] To address the aforementioned issues and enable rapid and effective handling of air system defects in pneumatic circuit breakers, an emergency pressure-building device for pneumatic circuit breakers is proposed. This device transforms the traditional power outage troubleshooting mode into uninterrupted operation, significantly shortening defect handling time and improving power supply reliability. Utility Model Content

[0005] The purpose of this utility model is to provide an emergency pressure-building device for pneumatic circuit breakers, addressing the aforementioned shortcomings. This device enables emergency pressure building and maintenance of the air system of the pneumatic circuit breaker, ensuring that the circuit breaker control circuit is not disconnected and preventing accidents caused by control circuit lockout leading to unsuccessful tripping due to line faults, thereby meeting the requirements for uninterrupted power supply maintenance. To achieve the above objective, this utility model provides the following technical solution:

[0006] An emergency pressure-building device for a pneumatic circuit breaker includes an air compressor, a condenser, a cylinder, and a drive motor; the drive motor is connected to the air compressor via a belt drive; the air compressor, condenser, and cylinder are connected in sequence via pipes; the top of the cylinder is provided with an outlet pipe; the outlet pipe is used to connect to the air system of the pneumatic circuit breaker, and its connection point is provided with a port that cooperates with the air system of the pneumatic circuit breaker.

[0007] Furthermore, a drain pipe is provided at the bottom of the cylinder.

[0008] Furthermore, a solenoid valve is provided on the pipe at the cylinder inlet; the solenoid valve is a two-position two-way solenoid valve.

[0009] Furthermore, the cylinder has a cylindrical structure with a smooth inner wall and is made of high-strength aluminum alloy.

[0010] Furthermore, the drive motor is equipped with a power line that is compatible with the internal power supply of the air system of the pneumatic mechanism circuit breaker.

[0011] Furthermore, it also includes a trolley; the trolley includes a base plate, a handle, and casters; the air compressor, condenser, cylinder, and drive motor are all fixed to the base plate; the base plate has a handle on one side and casters at the bottom.

[0012] The beneficial effects of this utility model are:

[0013] This utility model discloses an emergency pressure-building device for a pneumatic circuit breaker, comprising an air compressor, a condenser, a cylinder, and a drive motor. The drive motor is connected to the air compressor via a belt drive. The air compressor, condenser, and cylinder are sequentially connected by pipes. A lead-out pipe is provided at the top of the cylinder. The lead-out pipe is used to connect to the air system of the pneumatic circuit breaker, and its connection point has a port that cooperates with the air system of the pneumatic circuit breaker. The emergency pressure-building device for a pneumatic circuit breaker provided by this utility model enables emergency pressure building and maintenance of the air system of the pneumatic circuit breaker when a defect occurs, transforming the traditional power outage troubleshooting mode into uninterrupted operation, shortening defect handling time, and reducing maintenance costs. It has significant social and economic benefits and application value. Attached Figure Description

[0014] Figure 1 This is the front view of this utility model;

[0015] Figure 2 This is the right view of the present invention;

[0016] Figure 3 This is a top view of the present invention;

[0017] In the attached diagram: 1-Air compressor, 2-Condenser, 3-Cylinder, 4-Drive motor, 5-Pipe, 6-Outlet pipe, 7-Solenoid valve, 8-Drain pipe, 9-Power cord, 10-Trolley, 11-Base plate, 12-Handle, 13-Wheel casters. Detailed Implementation

[0018] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0019] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0020] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0021] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. The meaning of such spatial relative terms includes different orientations of the device in use or operation, in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0022] Example 1:

[0023] See attached Figures 1-3 This utility model discloses an emergency pressure-building device for a pneumatic circuit breaker, comprising an air compressor 1, a condenser 2, a cylinder 3, and a drive motor 4. The air compressor 1, condenser 2, and cylinder 3 are connected sequentially via pipes 5. The drive motor 4 is connected to the air compressor 1 via a belt drive. When the drive motor 4 starts, it drives the belt drive to rotate, thereby driving the air compressor 1 to start working. Air enters the air compressor 1 through its inlet and is compressed, increasing the gas pressure until it reaches a predetermined pressure range to meet the pressure-building requirements of the pneumatic circuit breaker's air system. Since the compression process causes the gas temperature to rise continuously, exceeding a certain temperature could affect the safe operation of the equipment. Therefore, the compressed air is transported through pipes 5 to the condenser 2 for cooling until it reaches a safe temperature range, ensuring the safe operation of the equipment. The cooled gas is then transported through pipes 5 to the cylinder 3 for storage. The top of cylinder 3 is equipped with an outlet pipe 6, and another end of outlet pipe 6 is equipped with a port that matches the air system of the pneumatic circuit breaker. Its shape, size, and connection method are precisely matched with the solenoid valve 7 of the pneumatic circuit breaker air system to ensure stable connection and efficient air supply. When the pneumatic circuit breaker air system loses pressure and cannot build up pressure, the high-pressure gas stored in cylinder 3 enters to build up pressure in the pneumatic circuit breaker air system, maintaining the normal operating pressure of the air system. This avoids the need for power outages due to pressure loss, enabling uninterrupted power supply handling of defects such as the inability to build up pressure in the pneumatic circuit breaker air system. This utility model's emergency pressure-building device for pneumatic circuit breakers enables emergency pressure building and maintenance of the pneumatic circuit breaker air system when defects occur, transforming the traditional power outage troubleshooting mode into uninterrupted operation, shortening defect handling time, reducing maintenance costs, and demonstrating significant socio-economic benefits and application value.

[0024] Specifically, the air compressor 1 can be a piston air compressor 1, which includes a cylinder 3 body, a piston, a connecting rod and a crankshaft. The piston reciprocates within the cylinder 3 body and is connected to the crankshaft via the connecting rod, converting the rotational motion of the crankshaft into the linear motion of the piston to compress the gas entering it.

[0025] Specifically, a drain pipe 8 is provided at the bottom of cylinder 3. Since gas liquefaction may occur during the cooling process, the drain pipe 8 can promptly discharge the liquefied gas generated during the cooling process, preventing liquid accumulation in cylinder 3 from affecting performance. The drain pipe 8 can have an L-shaped structure, with one end connected to the bottom of cylinder 3 and the other end extending downwards. A drain valve is provided on the drain pipe 8 to control the discharge of liquefied gas.

[0026] Specifically, a solenoid valve 7 is installed on the pipe 5 at the inlet of cylinder 3. The solenoid valve 7 is a two-position two-way solenoid valve with two states: open and closed. It is used to control the flow of cooled gas into cylinder 3.

[0027] Specifically, cylinder 3 has a cylindrical structure with a smooth inner wall to reduce gas flow resistance, and its material is high-strength aluminum alloy to ensure pressure resistance. Pipe 5 is made of stainless steel, which has good corrosion resistance and pressure resistance, and the inner diameter of pipe 5 is designed according to gas flow rate and pressure to ensure stable gas delivery.

[0028] Specifically, a power line 9 adapted to the internal power supply of the air system of the pneumatic mechanism circuit breaker is led out from the drive motor 4 for use in operation.

[0029] Specifically, the pneumatic circuit breaker emergency pressure building device also includes a trolley 10, which includes a base plate 11, a handle 12, and casters 13. The base plate 11 has a handle 12 on one side and casters 13 with brakes on the bottom. The air compressor 1, condenser 2, cylinder 3, and drive motor 4 are all fixed on the base plate 11, which facilitates the handling and on-site operation of the pressure building device.

[0030] All technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

[0031] The above embodiments are preferred implementations of this utility model. In addition, other implementations are also included. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An emergency pressure-building device for a pneumatic circuit breaker, characterized in that: It includes an air compressor (1), a condenser (2), a cylinder (3), and a drive motor (4); the drive motor (4) is connected to the air compressor (1) via a belt drive; the air compressor (1), the condenser (2), and the cylinder (3) are connected in sequence via pipes (5); the top of the cylinder (3) is provided with an outlet pipe (6); the outlet pipe (6) is used to connect to the air system of the pneumatic mechanism circuit breaker, and its connection point is provided with a port that cooperates with the air system of the pneumatic mechanism circuit breaker.

2. The emergency pressure-building device for a pneumatic circuit breaker according to claim 1, characterized in that: The bottom of the cylinder (3) is provided with a drain pipe (8).

3. The emergency pressure-building device for a pneumatic circuit breaker according to claim 1, characterized in that: A solenoid valve (7) is provided on the pipe (5) at the inlet of the cylinder (3); the solenoid valve (7) is a two-position two-way solenoid valve.

4. The emergency pressure-building device for a pneumatic circuit breaker according to claim 1, characterized in that: The cylinder (3) has a cylindrical structure with a smooth inner wall and is made of high-strength aluminum alloy.

5. The emergency pressure-building device for a pneumatic circuit breaker according to claim 1, characterized in that: The drive motor (4) is equipped with a power line (9) that is compatible with the internal power supply of the air system of the pneumatic mechanism circuit breaker.

6. The emergency pressure-building device for a pneumatic circuit breaker according to any one of claims 1 to 5, characterized in that: It also includes a trolley (10); the trolley (10) includes a base plate (11), a handle (12) and casters (13); the air compressor (1), condenser (2), cylinder (3) and drive motor (4) are all fixed on the base plate (11); the base plate (11) has a handle (12) on one side and casters (13) at the bottom.

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