Detection device for high-frequency partial discharge of high-voltage cable

Abstract

The utility model discloses a high-voltage cable high-frequency partial discharge detection device, which relates to the technical field of partial discharge detection, and is characterized in that a cooling coil pipe is arranged in a box body of a detection box and is opposite to a back plate of a detection terminal, and two groups of ventilation fans are arranged at pipe orifices at two ends of the cooling coil pipe; a pressure water inlet valve assembly is connected to the bent pipe portion of the top of the cooling coil in a communicating mode, and an overflow drainage valve assembly is connected to the bent pipe portion of the bottom of the cooling coil in a communicating mode. According to the design, the detection box is used as a closed carrier of the detection terminal, the detection box and the ventilation fan are combined to perform partial discharge detection on an external high-voltage cable environment, and in a daily detection process, based on the combination of the cooling coil and the ventilation fan, external ventilation of the ventilation fan and internal heat exchange of the cooling coil are performed to perform air-cooled heat dissipation and cooling on internal elements of the device. Based on the combination of the cooling coil pipe, the pressure water inlet valve assembly and the overflow drain valve assembly, external rainwater can be guided to flow into and out of the cooling coil pipe for water-cooling heat dissipation and cooling.

Description

TECHNICAL FIELD

[0001] The utility model relates to partial discharge detection field, especially a kind of detection device of high-frequency partial discharge of high-voltage cable. BACKGROUND

[0002] By real-time detection of the partial discharge of high-voltage cable, especially high-frequency partial discharge, potential faults of high-voltage cable can be found in time, and greater losses caused by expanding faults can be avoided. Therefore, it is necessary to detect the partial discharge of high-voltage cable using reasonable and effective technical means in daily maintenance and safe operation of high-voltage cable. For example, a high-frequency partial discharge detection device for high-voltage cable (publication number CN216117865U) disclosed by China Patent Network shows that this type of high-voltage cable partial discharge detection device is based on the setting of high-frequency partial discharge detection terminal. The high-frequency partial discharge detection terminal is used for real-time signal detection. The wireless data communication unit in the high-frequency partial discharge detection terminal is used for high-speed data communication. The optimized components are set to two groups, which can simultaneously cool and dust the left and right sides of the terminal detection box. The air flow is communicated through the wind cover and the wind pipe. The water-absorbing sponge in the wind cover is used for water collection and cooling in rainy days. The water pipe is distributed up and down for water collection and drainage.

[0003] However, the high-voltage cable partial discharge detection device adopted by the above-mentioned disclosed patent and existing market still has some deficiencies. The existing form of partial discharge detection device uses external air to blow the inside of the box for cooling, and uses rainwater to soak the sponge for cooling. Although this method has flexible cooling characteristics, the soaked sponge is not easy to dry, which can easily block the daily ventilation state, resulting in low daily cooling performance of the partial discharge detection device. Therefore, the technical personnel in the field provide a detection device for high-frequency partial discharge of high-voltage cable to solve the problems raised in the above background. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a detection device for high-frequency partial discharge of high-voltage cable, which solves the problem of low daily use performance of the existing high-voltage cable partial discharge detection device raised in the above background.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a detection device for high-frequency partial discharge of high-voltage cable, comprising a detection box;

[0006] A detection terminal is installed in the box body of the detection box;

[0007] A cooling coil is arranged on the back plate of the detection terminal in the box body of the detection box, and the cooling coil is a U-shaped coil structure;

[0008] Two groups of ventilation fans are arranged at the two ends of the cooling coil pipe;

[0009] The top elbow pipe part of the cooling coil pipe is connected with a pressure water inlet valve assembly in a lead-through mode, and the bottom elbow pipe part of the cooling coil pipe is connected with an overflow drain valve assembly in a lead-through mode.

[0010] As a further technical scheme of the utility model, one group of ventilation fans is an air inlet fan structure, and the other group of ventilation fans is an air outlet fan structure.

[0011] As a further technical scheme of the utility model, the pressure water inlet valve assembly comprises a water inlet cavity, a center frame is arranged in the middle of the cavity of the water inlet cavity, a water inlet pipe connected with the cooling coil pipe is arranged at the bottom of the water inlet cavity in a lead-through mode, an extension guide rod is arranged in the middle of the support of the center frame in a through connection mode, a sealing valve head for sealing the water inlet pipe is arranged at the bottom end of the arm rod of the extension guide rod, and a buoyancy air bag is arranged at the top end of the arm rod of the extension guide rod.

[0012] As a further technical scheme of the utility model, a compression spring is arranged on the outer side of the arm rod of the extension guide rod.

[0013] As a further technical scheme of the utility model, the overflow drain valve assembly comprises an overflow cavity, a drain pipe connected with the cooling coil pipe is arranged at the upper end of the cavity of the overflow cavity in a lead-through mode, and an overflow pipe is arranged on the side wall of the cavity of the overflow cavity in a lead-through mode, and the overflow port of the overflow pipe is higher than the drain port of the drain pipe.

[0014] As a further technical scheme of the utility model, a water collecting hopper is arranged at the upper end of the box body of the detection box, the hopper of the water collecting hopper is a slope surface structure, and a cover is arranged at the bottom of the slope of the water collecting hopper to cover the filter cover of the pressure water inlet valve assembly.

[0015] As a further technical scheme of the utility model, a plurality of groups of cooling fins are arranged along the pipe direction of the cooling coil pipe.

[0016] The utility model provides a kind of detection device of high-frequency partial discharge of high-voltage cable, and compared with prior art has following beneficial effects:

[0017] The partial discharge detection device of the high-voltage cable of the design is based on the detection box as the closed carrier of the detection terminal, utilizes the combination of the two, and detects the partial discharge of the external high-voltage cable environment, and in the daily detection process, based on the combination of the cooling coil and the ventilation fan, the ventilation fan is externally ventilated, the cooling coil is internally heat-exchanged, the internal elements of the device are air-cooled and cooled, and based on the combination of the cooling coil and the pressure water inlet valve assembly and the overflow drainage valve assembly, the external rainwater is guided into and out of the cooling coil, and is water-cooled and cooled, which has good closed cooling characteristics, can reduce the corrosion influence of the external environment on the internal electrical elements, and has flexible cooling characteristics, and the daily maintenance cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of a high-frequency partial discharge detection device of a high-voltage cable.

[0019] Figure 2 It is a first sectional view of a high-frequency partial discharge detection device of a high-voltage cable.

[0020] Figure 3 It is a second sectional view of a high-frequency partial discharge detection device of a high-voltage cable.

[0021] Figure 4 It is a structural schematic view of a cooling coil in a high-frequency partial discharge detection device of a high-voltage cable.

[0022] Figure 5 It is a structural schematic view of a pressure water inlet valve assembly in a high-frequency partial discharge detection device of a high-voltage cable.

[0023] Figure 6 It is an expanded schematic view of a pressure water inlet valve assembly in a high-frequency partial discharge detection device of a high-voltage cable.

[0024] Figure 7 It is a structural schematic view of an overflow drainage valve assembly in a high-frequency partial discharge detection device of a high-voltage cable.

[0025] In the figure: 1, detection box; 2, box door; 3, ventilation fan; 4, water collecting hopper; 5, filter cover; 6, cooling coil; 61, cooling fin; 7, pressure water inlet valve assembly; 71, water inlet cavity; 72, center frame; 73, telescopic guide rod; 74, compression spring; 75, buoyancy air bag; 76, water inlet pipe; 77, sealing valve head; 8, overflow drainage valve assembly; 81, overflow cavity; 82, drainage pipe; 83, overflow pipe; 9, detection terminal. DETAILED DESCRIPTION

[0026] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments, based on the embodiments of the present application, all the other embodiments obtained by the person of ordinary skill in the art without creative labor shall fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-7 The utility model provides a kind of detection device technical scheme of high-frequency partial discharge of high voltage cable, a kind of detection device of high-frequency partial discharge of high voltage cable, including detection box 1, detection terminal 9 is installed in the box body inside of detection box 1, the backboard of detection terminal 9 is provided with cooling coil pipe 6 in the box body inside of detection box 1, and cooling coil pipe 6 is U-shaped coil pipe structure, and multiple sets of cooling fins 61 are arranged along the pipe direction of cooling coil pipe 6, by being provided with cooling fin 61 on cooling coil pipe 6, the mechanical heat generated by electrical element in detection device is closed form heat dissipation cooling work using the combination of both, to avoid that rain, dust etc. in outside enters device inside, and electrical element is corroded.

[0028] Two groups of ventilation fans 3 are provided in the two end orifices of cooling coil pipe 6, one group of ventilation fans 3 is air inlet fan structure, and the other group of ventilation fans 3 is exhaust fan structure, by being provided as air inlet fan, exhaust fan structure structure respectively in two groups of ventilation fans 3, the state of downflow conduction can be formed, so that outside air is along cooling coil pipe 6 efficient circulation, carries away the heat generated by cooling coil pipe 6 and detection device internal heat exchange, to play the function of internal closed form air cooling heat dissipation.

[0029] Water collecting hopper 4 is provided on the upper end of the box body of detection box 1, the hopper of water collecting hopper 4 is inclined plane structure, and the slope bottom of water collecting hopper 4 is provided with the filter cover 5 of cover pressure water inlet valve assembly 7, by the setting of water collecting hopper 4, outside rainwater is collected and gathered, and under the filtration of filter cover 5, by pressure water inlet valve assembly 7, it is discharged to cooling coil pipe 6, to play the function of water cooling heat exchange.

[0030] The top elbow pipe part of the cooling coil 6 is connected with a pressure water inlet valve assembly 7, the pressure water inlet valve assembly 7 comprises a water inlet cavity 71, a center frame 72 is arranged in the middle of the cavity of the water inlet cavity 71, and the bottom of the water inlet cavity 71 is connected with a water inlet pipe 76 connected with the cooling coil 6, a telescopic guide rod 73 is connected in the middle of the support of the center frame 72, a sealing valve head 77 sealing the pipe opening of the water inlet pipe 76 is arranged at the bottom end of the arm rod of the telescopic guide rod 73, and a buoyancy air bag 75 is arranged at the top end of the arm rod of the telescopic guide rod 73, when the rainwater gradually flows into the water inlet cavity 71, the rainwater rises along the water inlet cavity 71, and then, under the action of buoyancy, the buoyancy air bag 75 is pushed to float upwards, the sealing valve head 77 is driven to move away from the pipe opening of the water inlet pipe 76 through the telescopic guide rod 73, so that the rainwater flows into the cooling coil 6, and the heat generated by heat exchange between the cooling coil 6 and the detection device is taken away, so that the water cooling and heat dissipation function in the internal closed form is realized.

[0031] The arm rod of the telescopic guide rod 73 is sleeved with a compression spring 74 opposite to the center frame 72, when the weather is fine, the water inlet cavity 71 does not store rainwater, the buoyancy of the buoyancy air bag 75 disappears, the sealing valve head 77 is reset downwards under the elastic force combination of the telescopic guide rod 73 and the compression spring 74, and abuts against the pipe opening of the water inlet pipe 76, so that the closed state is formed, so that the subsequent air cooling flow through the cooling coil 6 is ensured.

[0032] The bottom elbow pipe part of the cooling coil 6 is connected with an overflow drainage valve assembly 8, the overflow drainage valve assembly 8 comprises an overflow cavity 81, the overflow cavity 81 is connected with a drainage pipe 82 connected with the cooling coil 6 at the upper end of the cavity, and the cavity side wall of the overflow cavity 81 is connected with an overflow pipe 83, the overflow opening of the overflow pipe 83 is higher than the drainage opening of the drainage pipe 82, after the rainwater in the cooling coil 6 is heat-exchanged, the rainwater flows to the bottom elbow pipe part, flows into the overflow cavity 81 through the drainage pipe 82, and then, under the action of water pressure, the rainwater is overflowed through the overflow pipe 83, and since the pipe opening of the overflow pipe 83 is slightly higher than the drainage pipe 82, the overflow cavity 81 always maintains a proper amount of rainwater, so that the water seal state is maintained, and the subsequent air cooling flow through the cooling coil 6 is ensured.

[0033] The working principle of the utility model is as follows: when the detection device is used for detecting the high-frequency partial discharge of the high-voltage cable, based on the combination of the detection box 1 and the box door 2, as a sealed carrier, the electrical elements with the detection terminal 9 as the detection main body are sealed in the detection box, so that the detection work of the outdoor high-voltage cable is better adapted.

[0034] In the daily detection process, when the weather is fine, the air outside can flow through the cooling coil 6 efficiently through the structure of the inlet fan and the exhaust fan of the two groups of ventilation fans 3, so that the heat generated by heat exchange between the cooling coil 6 and the electrical elements in the detection device is taken away, so that the air cooling and heat dissipation function in the internal closed form is realized.

[0035] When it is rainy weather, the rainwater outside can be collected and converged by the setting of the water collecting pot 4, and the rainwater is filtered by the filter cover 5 into the pressure water inlet valve assembly 7, and then is discharged into the cooling coil 6, and when the rainwater gradually converges into the inside of the water inlet cavity 71, the rainwater rises along the water inlet cavity 71, and then under the action of the buoyancy, the floating air bag 75 is pushed to float up, the sealing valve head 77 is driven by the telescopic guide rod 73 to move away from the pipe orifice of the water inlet pipe 76, so that the rainwater is discharged into the cooling coil 6, and the heat generated by the heat exchange between the cooling coil 6 and the detection device is taken away, so as to play the water cooling and heat dissipation function in the form of internal sealing, and after the heat exchange of the rainwater, the rainwater converges to the bottom elbow pipe part of the cooling coil 6, and is discharged into the overflow cavity 81 through the drain pipe 82, and then under the action of the water pressure, the rainwater is discharged from the overflow through the overflow pipe 83, so as to dynamically circulate and cool and heat sink;

[0036] Then, in the process of detecting the partial discharge of the high-voltage cable, the heat is dissipated in the form of air cooling in sunny weather, and the heat is dissipated in the form of water cooling in rainy weather, so that the heat dissipation and cooling cost is lower.

[0037] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A device for detecting high frequency partial discharge of a high voltage cable, characterized in that, Including detection box (1); The detection terminal (9) is installed in the box body of the detection box (1); The backboard of the detection terminal (9) is provided with a cooling coil (6) in the box body of the detection box (1), and the cooling coil (6) is a U-shaped coil structure. Two groups of ventilation fans (3) are arranged at the two ends of the cooling coil (6). The top elbow part of the cooling coil (6) is connected with a pressure water inlet valve assembly (7), and the bottom elbow part of the cooling coil (6) is connected with an overflow drain valve assembly (8).

2. The device for detecting high-frequency partial discharge of a high-voltage cable according to claim 1, characterized by, One group of ventilation fans (3) is an air inlet fan structure, and the other group of ventilation fans (3) is an air outlet fan structure.

3. The device for detecting high-frequency partial discharge of a high-voltage cable according to claim 1, characterized in that, The pressure water inlet valve assembly (7) comprises a water inlet cavity (71), a center frame (72) is installed in the middle of the cavity of the water inlet cavity (71), and the bottom of the water inlet cavity (71) is connected with a water inlet pipe (76) connected with the cooling coil (6).

4. The apparatus for detecting high frequency partial discharge of a high voltage cable according to claim 3, wherein The middle of the support of the center frame (72) is connected with an extension guide rod (73), the bottom end of the arm rod of the extension guide rod (73) is provided with a sealing valve head (77) sealing the pipe opening of the water inlet pipe (76), and the top end of the arm rod of the extension guide rod (73) is provided with a buoyancy air bag (75).

5. The apparatus for detecting high frequency partial discharge of high voltage cable according to claim 1, characterized in that, The outer side of the arm rod of the extension guide rod (73) is sleeved with a compression spring (74) opposite to the center frame (72).

6. The apparatus for detecting high frequency partial discharge of a high voltage cable according to claim 1, wherein The overflow drain valve assembly (8) comprises an overflow cavity (81), the upper end of the cavity of the overflow cavity (81) is connected with a drain pipe (82) connected with the cooling coil (6), and the side wall of the cavity of the overflow cavity (81) is connected with an overflow pipe (83), the overflow port of the overflow pipe (83) is higher than the drain port of the drain pipe (82).

7. The apparatus for detecting high frequency partial discharge of high voltage cable according to claim 1, characterized in that, The upper end of the box body of the detection box (1) is provided with a water collecting hopper (4), the hopper of the water collecting hopper (4) is a slope surface structure, and the slope bottom of the water collecting hopper (4) is provided with a filter cover (5) covering the pressure water inlet valve assembly (7). The cooling coil (6) is arranged with a plurality of cooling fins (61) along the pipe direction thereof.

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