Phase step-down device for live working of power distribution network

Abstract

The utility model discloses a power distribution network hot-line work phase voltage reduction device comprising a power distribution network phase voltage control box, a ceramic insulation frame is fixedly arranged at the bottom of the inner wall of the power distribution network phase voltage control box, and a voltage reduction converter is fixedly installed on the ceramic insulation frame. One side of the step-down converter is fixedly provided with a high-voltage wire inlet side extending to the outside of the phase voltage control box of the power distribution network, and the phase voltage step-down device of the power distribution network is packaged by adopting the closed control box and is filled with insulating gas, so that the operation safety of the step-down device is improved, and the service life of the step-down device is prolonged. The circulating cooling mechanism is mounted at the top of the control box, insulating gas can continuously circulate in the control box and the outside, the auxiliary heat dissipation mechanism is matched, the heat dissipation effect is remarkable, a detection module is arranged in the control box, an instrument module for display is arranged outside the control box, workers can conveniently check related information parameters of the power distribution network during live-line work of the power distribution network, and the working efficiency is improved. Therefore, potential safety hazards are reduced, and the safety of hot-line work is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of live-line operation in distribution network, in particular to a phase voltage reduction device for live-line operation in distribution network. Background Art

[0002] The distribution network is composed of overhead lines, cables, towers, distribution transformers, disconnectors, reactive power compensators and some ancillary facilities. It plays an important role in distributing electric energy in the power grid. Live work in the distribution network can effectively reduce the duration of power outages during distribution network maintenance and improve the reliability of power supply. At present, the phase voltage step-down device in the distribution network is mainly composed of a shell, a step-down device and a detection circuit module. The step-down device is encapsulated in the shell, and the phase voltage of the three-phase electricity is stepped down by the step-down device. The above common types of step-down devices have the following shortcomings in actual applications:

[0003] The step-down transformer and the corresponding detection circuit components are directly encapsulated in the shell. The step-down transformer and the circuit components will generate heat when working. The cooling effect is not significant if the cooling is only aided by the heat sink and other structures on the shell. At the same time, the air inside the shell will be ionized under the action of high voltage, and the safety of live working is insufficient. Utility Model Content

[0004] The utility model aims to provide a phase voltage step-down device for live working in a distribution network, so as to solve the problems in the above-mentioned background technology that the existing phase voltage step-down device for distribution network has poor heat dissipation effect and potential safety hazards in live working.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a phase voltage step-down device for live working in a distribution network, comprising a distribution network phase voltage control box, a ceramic insulating frame is fixedly arranged at the bottom of the inner wall of the distribution network phase voltage control box, a step-down converter is fixedly installed on the ceramic insulating frame, a high-voltage incoming line side extending to the outside of the distribution network phase voltage control box is fixedly installed on one side of the step-down converter, a low-voltage outgoing line side extending to the outside of the distribution network phase voltage control box is fixedly installed on the other side of the step-down converter, a ventilation top box is fixedly installed on the top of the distribution network phase voltage control box, a cooling mechanism for cooling the insulating gas in the distribution network phase voltage control box is fixedly installed on the bottom of the inner wall of the ventilation top box, and an auxiliary heat dissipation component is fixedly installed on the ventilation top box.

[0006] Preferably, the cooling mechanism includes a circulating air duct and a circulating fan fixedly installed inside the circulating air duct, the top of the circulating air duct is fixedly connected to a heat exchange tube, one end of the heat exchange tube is fixedly connected to a three-way tube, the three-way tube is fixedly connected to a flow supply tube, and the bottom end of the flow supply tube and the bottom end of the circulating air duct both extend to the interior of the phase voltage control box of the distribution network.

[0007] Preferably, a safety air valve is fixedly installed on one side of the three-way pipe.

[0008] Preferably, the auxiliary heat dissipation component includes a heat dissipation channel and a heat dissipation fan fixedly installed inside the heat dissipation channel, and air inlets are provided on both sides of the ventilation top box, and a dust filter is fixedly installed inside the air inlet; the ventilation is smooth and the heat dissipation effect is significant.

[0009] Preferably, a detection module for monitoring the stable movement of the step-down device is fixedly installed on the inner wall of the distribution network phase voltage control box; this is beneficial to improving the stability of the step-down and enabling faults to be discovered in time.

[0010] Preferably, a transparent waterproof cover is hinged on the front of the distribution network phase voltage control box, and an instrument module for querying parameters related to live operations in the distribution network is fixedly installed on the inner side of the transparent waterproof cover; this facilitates the staff to check the relevant grid parameters when working live.

[0011] Preferably, a base is fixedly provided in the middle of the bottom end of the distribution network phase voltage control box to facilitate the installation of the voltage reduction device.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The phase voltage step-down of the distribution network adopts a closed control box to encapsulate the step-down equipment and fill it with insulating gas to improve the safety of the step-down device during operation. A circulating cooling mechanism is installed on the top of the control box to enable the insulating gas to circulate continuously between the control box and the outside world. With the auxiliary heat dissipation mechanism, the heat dissipation effect is significant. The built-in detection module and the external display instrument module make it convenient for the staff to view the relevant information parameters of the distribution network when working on the live distribution network, thereby reducing safety hazards and improving the safety of live working. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the phase voltage reduction device of the utility model;

[0015] Figure 2 It is a front cross-sectional view of the phase voltage reduction device of the utility model;

[0016] Figure 3 It is a front cross-sectional view of the cooling mechanism of the utility model;

[0017] Figure 4 It is an enlarged view of part A of the utility model.

[0018] In the figure: 1. Distribution network phase voltage control box; 2. Ventilation top box; 3. High-voltage incoming line side; 4. Low-voltage outgoing line side; 5. Base; 6. Instrument module; 7. Transparent waterproof cover; 8. Heat dissipation channel; 9. Air inlet; 10. Dust filter; 11. Ceramic insulation frame; 12. Buck converter; 13. Circulating air duct; 14. Circulating fan; 15. Heat exchange tube; 16. Cooling fan; 17. Three-way pipe; 18. Detection module; 19. Safety air valve; 20. Supply pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See also Figure 1-4 The utility model provides a phase voltage reduction device for live operation of a distribution network, including a distribution network phase voltage control box 1, a ceramic insulation frame 11 is fixedly arranged at the bottom of the inner wall of the distribution network phase voltage control box 1, a step-down converter 12 is fixedly installed on the ceramic insulation frame 11, a high-voltage incoming line side 3 extending to the outside of the distribution network phase voltage control box 1 is fixedly installed on one side of the step-down converter 12, a low-voltage outgoing line side 4 extending to the outside of the distribution network phase voltage control box 1 is fixedly installed on the other side of the step-down converter 12, and a ventilation top box is fixedly installed on the top of the distribution network phase voltage control box 1 2. A cooling mechanism for cooling the insulating gas in the phase voltage control box 1 of the power distribution network is fixedly installed at the bottom of the inner wall of the ventilation top box 2, an auxiliary heat dissipation component is fixedly installed on the ventilation top box 2, a detection module 18 for monitoring the stable movement of the voltage reduction device is fixedly installed on the inner wall of the phase voltage control box 1 of the power distribution network, a base 5 is fixedly arranged in the middle of the bottom end of the phase voltage control box 1 of the power distribution network, a transparent waterproof cover 7 is hinged on the front of the phase voltage control box 1 of the power distribution network, and an instrument module 6 for querying parameters related to live working of the power distribution network is fixedly installed on the inner side of the transparent waterproof cover 7;

[0021] When in use, the high-voltage incoming line side 3 and the low-voltage outgoing line side 4 are both provided with four terminals, corresponding to the three live wires and one neutral wire of the distribution network. After the high-voltage side of the distribution network is stepped down by the step-down converter 12, the stepped-down phase voltage is output by the low-voltage outgoing line side 4. The distribution network phase voltage control box 1 is filled with sulfur hexafluoride gas to improve the insulation inside the distribution network phase voltage control box 1. The detection module 18 is a combination for detecting the stable movement of the step-down device, which includes a control module, a circuit breaker module, a voltage and current detection module, a box temperature detection module and a box air pressure detection module. The instrument module 6 is a display instrument corresponding to the detection module 18. When working with power on, it is convenient for the operator to view the relevant parameters of the distribution network in the area, so as to adjust the working measures in time and improve the safety of the operation.

[0022] See also Figure 1 , Figure 2 and Figure 3 Further, the cooling mechanism includes a circulating air duct 13 and a circulating fan 14 fixedly installed inside the circulating air duct 13, the top of the circulating air duct 13 is fixedly connected with a heat exchange tube 15, one end of the heat exchange tube 15 is fixedly connected with a three-way tube 17, the three-way tube 17 is fixedly connected with a flow supply tube 20, the bottom ends of the flow supply tube 20 and the bottom ends of the circulating air duct 13 both extend to the inside of the distribution network phase voltage control box 1, and a safety air valve 19 is fixedly installed on one side of the three-way tube 17;

[0023] During use, after the temperature in the distribution network phase voltage control box 1 reaches the set value, the circulating fan 14 will work, and the circulating fan 14 will continuously draw the hot air flow inside the distribution network phase voltage control box 1 through the circulating air duct 13, so that the hot air flow circulates in the heat exchange tube 15, and after heat exchange with the outside, it enters the flow supply tube 20 through the three-way pipe 17, and finally re-enters the distribution network phase voltage control box 1. By circulating and cooling the insulating gas, the equipment in the box is cooled. When the internal pressure of the insulating gas in the box is too high, the safety air valve 19 will open, thereby balancing the air pressure in the box and improving operation safety.

[0024] See also Figure 1 and Figure 2 Further, the auxiliary heat dissipation component includes a heat dissipation channel 8 and a heat dissipation fan 16 fixedly installed inside the heat dissipation channel 8, air inlets 9 are opened on both sides of the ventilation top box 2, and a dust filter 10 is fixedly arranged inside the air inlet 9;

[0025] When in use, during the heat dissipation process, the heat dissipation fan 16 will work, introduce external airflow through the air inlet 9, contact with the heat exchange tube 15, and discharge it through the heat dissipation channel 8 after carrying heat, which is conducive to accelerating heat dissipation.

[0026] When the embodiment of the present application is in use: after the temperature in the distribution network phase voltage control box 1 is set to a high value, the circulation fan 14 and the heat dissipation fan 16 will work at the same time, and the circulation fan 14 will continuously draw the hot air flow inside the distribution network phase voltage control box 1 through the circulation air duct 13, so that the hot air flow circulates in the heat exchange tube 15, and the heat dissipation fan 16 introduces external air flow through the air inlet 9, contacts the heat exchange tube 15, and is discharged through the heat dissipation channel 8 after carrying heat. The insulating gas in the distribution network phase voltage control box 1 enters the flow supply pipe 20 through the three-way pipe 17, and finally re-enters the distribution network phase voltage control box 1. The cooling of the equipment in the box is achieved by circulating and cooling the insulating gas, and the heat dissipation effect is significant.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A phase voltage reduction device for live working in a distribution network, comprising a phase voltage control box (1) for a distribution network, characterized in that: A ceramic insulating frame (11) is fixedly arranged at the bottom of the inner wall of the distribution network phase voltage control box (1), a buck converter (12) is fixedly mounted on the ceramic insulating frame (11), a high-voltage incoming line side (3) extending to the outside of the distribution network phase voltage control box (1) is fixedly mounted on one side of the buck converter (12), and a low-voltage outgoing line side (4) extending to the outside of the distribution network phase voltage control box (1) is fixedly mounted on the other side of the buck converter (12), a ventilated top box (2) is fixedly mounted on the top of the distribution network phase voltage control box (1), a cooling mechanism for cooling insulating gas in the distribution network phase voltage control box (1) is fixedly mounted on the bottom of the inner wall of the ventilated top box (2), and an auxiliary heat dissipation component is fixedly mounted on the ventilated top box (2).

2. The phase voltage reduction device for live working in distribution network according to claim 1, characterized in that: The cooling mechanism comprises a circulating air duct (13) and a circulating fan (14) fixedly installed inside the circulating air duct (13); the top end of the circulating air duct (13) is fixedly connected to a heat exchange tube (15); one end of the heat exchange tube (15) is fixedly connected to a three-way tube (17); the three-way tube (17) is fixedly connected to a flow supply tube (20); the bottom ends of the flow supply tube (20) and the bottom end of the circulating air duct (13) both extend to the interior of a distribution network phase voltage control box (1).

3. The phase voltage reduction device for live working in distribution network according to claim 2, characterized in that: A safety air valve (19) is fixedly mounted on one side of the three-way pipe (17).

4. The phase voltage reduction device for live working in distribution network according to claim 1, characterized in that: The auxiliary heat dissipation component comprises a heat dissipation channel (8) and a heat dissipation fan (16) fixedly installed inside the heat dissipation channel (8); air inlets (9) are provided on both sides of the ventilation top box (2); and a dust filter (10) is fixedly provided inside the air inlet (9).

5. The phase voltage reduction device for live working in distribution network according to claim 1, characterized in that: A detection module (18) for monitoring the stable movement of the voltage reduction device is fixedly installed on the inner side wall of the power distribution network phase voltage control box (1).

6. The phase voltage reduction device for live working in distribution network according to claim 1, characterized in that: A transparent waterproof cover (7) is hingedly connected to the front of the distribution network phase voltage control box (1), and an instrument module (6) for querying parameters related to live-line operation of the distribution network is fixedly installed on the inner side of the transparent waterproof cover (7).

7. The phase voltage reduction device for live working in distribution network according to claim 1, characterized in that: A base (5) is fixedly arranged in the middle of the bottom end of the power distribution network phase voltage control box (1).

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