Porcelain column type sulfur hexafluoride circuit breaker heating and holding device

Abstract

The utility model discloses a porcelain post type sulfur hexafluoride circuit breaker heating heat preservation device, include: heat preservation shell, heating assembly, heat conduction block, temperature control component, the heating assembly is closed circular arc shape, and the bottom flange outside of porcelain post type circuit breaker is sleeved in, the heat conduction block is equipped with a plurality of, and is inserted on the heating assembly, and the outer surface of heating assembly is contacted with heat conduction block, the inner surface of heat conduction block is contacted with the bottom flange surface of circuit breaker, the porcelain post type sulfur hexafluoride circuit breaker heating heat preservation device provided by the utility model, the device simple structure, small, convenient to install can be installed on the sulfur hexafluoride circuit breaker of existing, and the maintenance is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker maintenance technology, specifically relating to a heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker. Background Technology

[0002] Sulfur hexafluoride (SF6) circuit breakers are critical equipment in power systems, relying on the excellent insulation and arc-quenching properties of SF6 gas to ensure the safe operation of the power grid. However, SF6 gas is prone to liquefaction at low temperatures, leading to a decrease in the breaking capacity of the circuit breaker or even failure. Liquefaction can also cause equipment alarms and lockouts. Adding gas during liquefaction increases the total gas volume, potentially causing excessive pressure, leakage, or even explosion when temperatures rise. Insulation and heating measures can effectively alleviate this problem, but older open-type circuit breakers lack heating tape, and adding it presents challenges such as structural incompatibility, low thermal efficiency, difficulty in installing the equipment while it is energized, and unreliable temperature control devices. Therefore, there is an urgent need for an insulation device that can be used in existing sulfur hexafluoride circuit breaker structures. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker, so as to solve the problem of sulfur hexafluoride gas liquefaction in the circuit breaker under low temperature environment.

[0004] The technical solution provided by this utility model is: a heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker, comprising: an insulation shell, a heating component, a heat-conducting block, and a temperature control component. The heating component is in the shape of a closed arc and is sleeved on the outside of the bottom flange of the porcelain column-type circuit breaker. Multiple heat-conducting blocks are provided and inserted on the heating component. The outer surface of the heating component is in contact with the heat-conducting blocks. The inner surface of the heat-conducting blocks is in contact with the bottom flange surface of the circuit breaker. The insulation shell is sleeved on the heating component and the heat-conducting blocks. The temperature control component includes a temperature sensor, which is embedded in the heat-conducting block.

[0005] Preferably, the heat-insulating outer shell has a double-layer structure, with an outer layer of steel plate and an inner layer of flame-retardant heat-insulating cotton.

[0006] Preferably, the heating component is a heating cable; the heating cable is fixed in a closed arc shape by cable ties and fastened to the outside of the bottom flange of the porcelain column circuit breaker.

[0007] Preferably, the gap between the heat-conducting block and the heat tracing cable is filled with a thermally conductive silicone grease layer, and the gap between the inner surface of the heat-conducting block (102) and the bottom flange surface of the circuit breaker is filled with a thermally conductive silicone grease layer.

[0008] Preferably, the heat-conducting block includes a solid block of aluminum or copper structure and a detachable mounting plate. The inner surface of the solid block is arc-shaped, matching the inherent curvature of the bottom flange surface of the circuit breaker. The outer surface of the solid block is provided with a groove, which is adapted to the shape of the heat tracing cable, and the heat tracing cable is snapped into the groove. The detachable mounting plate is installed on the outer surface of the solid block and covers the groove.

[0009] Preferably, the temperature control component further includes a control box, which contains a logic controller, a power module, and a communication module; the controller is electrically connected to the temperature sensor, the heating component, and the communication module, respectively, and the power module is electrically connected to the logic controller and the communication module, respectively.

[0010] The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker provided by this utility model has a simple structure, small size, and convenient installation. It can be installed on existing sulfur hexafluoride circuit breakers and is easy to maintain. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the overall installation structure of the heating and insulation device for the porcelain column-type sulfur hexafluoride circuit breaker provided by this utility model. Figure 2 A partial structural schematic diagram of the heating and insulation device for the porcelain column-type sulfur hexafluoride circuit breaker provided by this utility model. Figure 3 A schematic diagram of the overall structure of the heating and insulation device for the porcelain column type sulfur hexafluoride circuit breaker provided by this utility model. Detailed Implementation

[0014] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention.

[0015] A porcelain-column-type circuit breaker includes a porcelain bushing and a bottom flange located below the porcelain bushing. The bottom flange includes a cylindrical side surface and reinforcing ribs spaced circumferentially along the cylindrical side surface and connected to it. Addressing the problems of large size and the need to modify the original circuit breaker layout for installation in existing circuit breaker insulation structures, this utility model provides a heating and insulation device for a porcelain-column-type sulfur hexafluoride circuit breaker, such as... Figure 1 As shown, it includes an insulation shell 101, a heating component 103, a heat-conducting block 102, and a temperature control component; The heating component 103 is in the shape of a closed arc and is sleeved on the outside of the bottom flange of the porcelain column circuit breaker, that is, sleeved on the side of the cylinder, as shown. Figure 2 As shown, multiple heat-conducting blocks 102 are provided and inserted into the heating assembly 103. The outer surface of the heating assembly 103 is in contact with the heat-conducting blocks 102; the inner surface of the heat-conducting blocks 102 is in contact with the bottom flange face of the circuit breaker. By placing the heat-conducting blocks 102 between the heating device 103 and the circuit breaker 106, the heat generated by the heating assembly 103 is effectively transferred to the circuit breaker 106. The heat-conducting blocks 102 are evenly distributed on the outer side of the flange, separated by the aforementioned reinforcing ribs. The heating assembly 103 described above adopts a heating cable structure; the heating cable is fixed in a closed arc shape by cable ties 109 and fastened to the outside of the bottom flange of the porcelain column circuit breaker. The cable ties 109 can be stainless steel cable ties or the like in the prior art, and the tightness of the heating cable binding can be adjusted arbitrarily.

[0016] Preferably, the gaps between the heat-conducting block 102 and the heating cable are filled with a layer of thermally conductive silicone grease, and the gaps between the inner surface of the heat-conducting block 102 and the bottom flange surface of the circuit breaker are also filled with a layer of thermally conductive silicone grease. The core function of the thermally conductive silicone grease layer is to fill gaps, reduce thermal resistance, and improve the heat transfer efficiency between the heating cable and the heat-conducting block. It fills tiny gaps and air gaps on the contact surface, preventing air insulation from causing poor heat conduction. The thermally conductive silicone grease itself has a high thermal conductivity, which can quickly transfer the heat generated by the heating cable to the heat-conducting block, reducing heat loss.

[0017] Preferably, the heat-conducting block 102 includes a solid block made of aluminum or copper and a detachable mounting plate 110. The inner surface of the solid block is arc-shaped, matching the inherent curvature of the bottom flange face of the circuit breaker. The installation of the heating block 102 is more secure through the binding of the cable ties 109 and the fitting of the arc surface of the inner side of the heat-conducting block. The outer surface of the solid block has a groove that matches the shape of the heat tracing cable, and the heat tracing cable is snapped into the groove. A detachable mounting plate is installed on the outer surface of the solid block and covers the groove. This mounting door makes the installation and removal of the heat tracing cable more convenient.

[0018] The heat insulation shell 101 is fitted over the heating component 103 and the heat-conducting block 102. Preferably, the heat insulation shell 101 adopts a double-layer structure, with the outer layer being a steel plate structure that has a certain impact resistance, and the inner layer being flame-retardant heat insulation cotton that has the ability to block heat loss and isolate the fire in the event of a fire.

[0019] The thermal insulation shell 101 can be designed as a two-part split structure, which is convenient for disassembly and installation.

[0020] The device provided by this utility model can automatically control the temperature of sulfur hexafluoride circuit breakers; it has a simple structure, is easy to install, operates reliably, and can be installed on existing sulfur hexafluoride circuit breakers.

[0021] This invention enables the sulfur hexafluoride circuit breaker to operate within a constant temperature range through the cooperation of a temperature control component and the aforementioned structure; uniform heat conduction is achieved through programmed heating and the combination of a heat-conducting block.

[0022] The aforementioned temperature control components include a temperature sensor 104 and a control box 107. The control box contains a controller, a power module, and a communication module. That is, the temperature sensor and the heating device are electrically connected to the intelligent control box to form a closed-loop temperature control system.

[0023] Specifically, the power supply module provides power to the controller, communication module, and temperature sensor, serving as the power source for the entire system and ensuring the stable operation of each module. Temperature sensors (such as PT100, thermocouples) are connected to the controller. Temperature sensor 104 is embedded in heat-conducting block 102 to detect the temperature of heat-conducting block 102 and continuously transmit the collected temperature signal to the controller to provide a basis for control logic. The controller receives power from the power module on one hand; on the other hand, it connects to the communication module through the signal port to send and receive commands and upload data; it also controls the start and stop of the heating tape. The communication module connects to the controller, receives temperature data and fault alarm signals from the controller, and transmits control commands (such as start / stop and temperature adjustment) issued by the remote platform to the controller, realizing bidirectional signal transmission.

[0024] The controller controls the working state of the heating component 103 according to the temperature sensor data and the heating program set in the program. Preferably, the communication module supports remote monitoring and alarm functions.

[0025] The structure provided by this utility model, combined with a temperature control component, achieves a circuit breaker insulation structure with stable structural operation, automatic start and stop heating, and remote alarm capability.

[0026] The application of the above-mentioned device for constant temperature control of porcelain column circuit breakers includes: 1) Temperature acquisition: The temperature of the circuit breaker body, SF6 gas chamber or control box is monitored in real time by temperature sensors (such as PT100, thermocouple).

[0027] 2) The temperature sensor data is transmitted to the controller and compared with the preset upper and lower temperature limits (such as 5℃-40℃) to determine whether the temperature control action needs to be started or stopped.

[0028] 3) Adjustment: The heating tape is activated when the temperature is below the lower limit, and a low-power heat preservation mode is activated when the temperature is above the upper limit. An alarm is triggered in case of abnormality. The temperature can also be lowered to the set temperature by opening the heat preservation shell.

[0029] This constant temperature device enables the sulfur hexafluoride circuit breaker to operate within a constant temperature range, preventing sulfur hexafluoride gas from liquefying in low-temperature environments. It features automatic start / stop, automatic alarm, high heating uniformity, adaptive temperature adjustment, and convenient installation, reducing the workload of workers and meeting the normal operation requirements of the circuit breaker in low-temperature environments.

[0030] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0031] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker, characterized in that, include: The circuit includes an insulation shell (101), a heating assembly (103), a heat-conducting block (102), and a temperature control assembly. The heating assembly (103) is in the shape of a closed arc and is fitted onto the outside of the bottom flange of the ceramic column circuit breaker. Multiple heat-conducting blocks (102) are provided and are inserted into the heating assembly (103). The outer surface of the heating assembly (103) is in contact with the heat-conducting block (102). The inner surface of the heat-conducting block (102) is in contact with the bottom flange of the circuit breaker. The insulation shell (101) is fitted over the heating assembly (103) and the heat-conducting block (102). The temperature control assembly includes a temperature sensor, which is embedded in the heat-conducting block (102).

2. The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker according to claim 1, characterized in that, The heat-insulating outer shell (101) has a double-layer structure, with an outer layer of steel plate and an inner layer of flame-retardant heat-insulating cotton.

3. The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker according to claim 1, characterized in that, The heating component (103) is a heating cable; the heating cable is fixed in a closed arc shape by cable ties and fastened to the outside of the bottom flange of the porcelain column circuit breaker.

4. The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker according to claim 3, characterized in that, The gap between the heat-conducting block (102) and the heat tracing cable is filled with a layer of thermally conductive silicone grease, and the gap between the inner surface of the heat-conducting block (102) and the bottom flange surface of the circuit breaker is filled with a layer of thermally conductive silicone grease.

5. The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker according to claim 3, characterized in that, The heat-conducting block (102) includes a solid block made of aluminum or copper and a detachable mounting plate. The inner surface of the solid block is arc-shaped, matching the inherent curvature of the bottom flange surface of the circuit breaker. The outer surface of the solid block is provided with a groove, which is adapted to the shape of the heat tracing cable, and the heat tracing cable is snapped into the groove. The detachable mounting plate is installed on the outer surface of the solid block and covers the groove.

6. The heating and insulation device for a porcelain column-type sulfur hexafluoride circuit breaker according to claim 1, characterized in that, The temperature control component also includes a control box (107), which contains a logic controller, a power module and a communication module. The controller is electrically connected to the temperature sensor, the heating component and the communication module respectively, and the power module is electrically connected to the logic controller and the communication module respectively.

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