Direct current magnetic bias suppression device

Abstract

The direct current magnetic bias suppression device comprises a resistor and a heat conduction box, the heat conduction box is a door-shaped box body embedded in the outer side of the resistor, a machine shell is arranged above the heat conduction box, a top cover for supporting the machine shell is arranged at an opening in the top of the heat conduction box, a filter plate is arranged at an opening in the front of the machine shell, and the filter plate is connected with the heat conduction box. A fan blowing air downwards is arranged in the machine shell, and a cleaning part is arranged in the machine shell. The cleaning part comprises two groups of synchronous belts which transversely extend to the rear side of the filter plate. The direct-current magnetic bias suppression device has the beneficial effects that the heat conduction box in which the cooling liquid is stored is arranged above the resistor serving as the direct-current magnetic bias suppression device, the cooling liquid is circulated in the water inlet pipe, the heat conduction box, the water outlet pipe and the heat dissipation pipe through the water pump, and the heat dissipation pipe is subjected to air cooling heat dissipation through the fan, so that the heat dissipation effect of the resistor is improved; meanwhile, the rotatable synchronous belt supporting brush rod is arranged to serve as a brushing and sweeping cleaning part of the filter holes in the filter plate, and cleaning is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of power transmission facilities, in particular to a direct current magnetic bias suppression device. Background Art

[0002] With the rapid development of DC transmission technology in my country, the system debugging, equipment failure or maintenance in the early stage of DC transmission system construction make it almost inevitable for the DC system to operate in a single pole loop mode or a bipolar unbalanced mode. When the DC system operates in a single pole loop mode or a bipolar unbalanced mode, the DC current of up to several thousand amperes in the system is injected into the earth through the grounding electrode. When the DC current flows through the transformer winding through the grounded neutral point of the transformer, it will cause DC bias in the transformer magnetic circuit, resulting in core saturation and causing problems such as excessive noise and overheating of the main transformer. In severe cases, the transformer will be damaged, and the safe and stable operation of the power system will be threatened. Therefore, it is necessary to set up a resistive DC bias suppression device to cool the transformer. Most of the current DC bias suppression equipment uses air cooling to dissipate heat. During long-term outdoor use, there is a problem of impurities gathering at the air inlet end of the fan, causing the air holes to be blocked. During the cleaning process, the filter can only be removed for processing, which is poor in practicality. Utility Model Content

[0003] The purpose of the present utility model is to provide a DC bias suppression device in order to solve the above-mentioned problem. A heat transfer box containing coolant is arranged above a resistor serving as a DC bias suppression device. The coolant is circulated in a water inlet pipe, the heat transfer box, the water outlet pipe and the heat dissipation pipe by a water pump. The heat dissipation pipe is cooled by a fan to improve the heat dissipation effect of the resistor. Details are described below.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a DC bias magnetic suppression device, comprising a resistor and a heat conduction box, wherein the heat conduction box is a door-shaped box body embedded in the outer side of the resistor, a housing is arranged above the heat conduction box, a top cover supporting the housing is arranged at the top opening of the heat conduction box, a filter plate is arranged at the front opening of the housing, a fan for blowing air downwards is arranged inside the housing, and a cleaning part is arranged inside the housing;

[0006] The cleaning part includes two groups of synchronous belts extending laterally to the rear side of the filter plate, two groups of rotating shafts supporting the rotation of the synchronous belts are vertically penetrated in the middle of the synchronous belts, the top ends of the rotating shafts pass downward through the casing, and a brush rod abutting against the rear side of the filter plate is vertically fixed on the outer side of the synchronous belt, and the outer side of the brush rod is densely covered with bristles.

[0007] The above-mentioned DC bias magnetic suppression device is adopted. When in use, the coolant is circulated between the heat conduction box, the water outlet pipe, the heat dissipation pipe and the water inlet pipe through the water pump in the heat conduction box, and the fan blades are used to blow air downward to dissipate the heat of the heat dissipation pipe and the top cover. The heat conduction box transfers the heat of the resistor to the internal coolant, and the coolant is introduced into the heat dissipation pipe for air cooling. The fan draws air through the filter plate position. After long-term use causes the filter holes on the filter plate to be blocked by impurities, the rotating knob is used to drive the shaft to rotate, and the shaft is used to support the rotation of the synchronous belt and the brush rod. The bristles on the outside of the brush rod clean and dredge the filter holes on the filter plate to ensure the smooth air intake of the filter plate.

[0008] Preferably, a baffle supporting the filter plate is fixed to the outer edge of the top opening of the casing, and rotating holes supporting the rotation of the rotating shaft are vertically penetrated through the upper and lower sides of the casing, and a knob is fixed to the top of the rotating shaft, and pulleys supporting the rotation of the synchronous belt are provided at both ends of the rotating shaft inside the casing, and a mounting hole for accommodating the fan is provided on the top side of the casing.

[0009] Preferably, an air guide cover is fixed at the bottom of the casing, a receiving hole connected to the air guide cover is vertically penetrated through the bottom of the casing, an air guide ring is transmission-connected to the output end of the bottom of the fan, and a plurality of groups of arc-shaped extending fan blades are arranged around the top side of the air guide ring.

[0010] Preferably, the heat conduction box is a hollow structure with an opening at the top, a water inlet pipe is connected to the bottom rear side of the heat conduction box, and a water outlet pipe is connected to the top rear side of the heat conduction box.

[0011] Preferably, the water outlet pipe and the top end of the water inlet pipe are connected with a serpentine-extending heat dissipation pipe, and a water pump is provided at the junction of the bottom of the heat conduction box and the water inlet pipe.

[0012] Preferably, the heat dissipation pipe is a copper pipe, and the heat dissipation pipe extends above the top cover and is closely attached to the top cover.

[0013] Preferably, fixing ears extending downward to the outside of the heat conduction box are fixed at the four corners of the top cover, and screws connecting the top cover and the heat conduction box are penetrated through the middle of the fixing ears.

[0014] Preferably, the filter plate is densely covered with filter holes in the middle, and the outer ends of the bristles extend forward from the filter holes.

[0015] The beneficial effects are as follows: the utility model arranges a heat conduction box containing coolant above the resistor as a DC bias suppression device, circulates the coolant in the water inlet pipe, the heat conduction box, the water outlet pipe and the heat dissipation pipe through a water pump, and performs air cooling and heat dissipation on the heat dissipation pipe through a fan, thereby improving the heat dissipation effect of the resistor;

[0016] At the same time, a filter plate is installed at the air inlet position of the casing in front of the fan, and a rotatable synchronous belt-supported brush rod is provided as a brushing and cleaning component for the filter holes on the filter plate, so that when the filter plate is blocked, the filter plate can be cleaned by rotating the synchronous belt-supported brush rod to unclog the blocked filter holes, making cleaning more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a right view structural diagram of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the structural disassembly of the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the heat conduction box of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the cleaning part of the utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Resistor; 2. Heat conduction box; 201. Water inlet pipe; 202. Water outlet pipe; 203. Heat dissipation pipe; 3. Casing; 301. Baffle; 302. Rotation hole; 303. Accommodation hole; 304. Mounting hole; 305. Air guide cover; 4. Fan; 401. Fan blade; 402. Air guide ring; 5. Filter plate; 6. Cleaning part; 601. Rotating shaft; 602. Pulley; 603. Synchronous belt; 604. Brush rod; 605. Knob; 7. Top cover; 701. Fixing ear. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5As shown, the utility model provides a DC bias magnetic suppression device, including a resistor 1 and a heat conduction box 2, the heat conduction box 2 is a door-shaped box body embedded in the outside of the resistor 1, a housing 3 is arranged above the heat conduction box 2, a top cover 7 supporting the housing 3 is arranged at the top opening of the heat conduction box 2, a filter plate 5 is arranged at the front opening of the housing 3, and a fan 4 for blowing air downward is arranged inside the housing 3, and the fan 4 takes in air through the position of the filter plate 5, and a cleaning part 6 is arranged inside the housing 3;

[0027] The cleaning part 6 includes two groups of synchronous belts 603 extending laterally to the rear side of the filter plate 5, and two groups of rotating shafts 601 supporting the rotation of the synchronous belt 603 are vertically penetrated in the middle of the synchronous belt 603, and the top of the rotating shaft 601 passes downward through the casing 3, and a brush rod 604 abutting against the rear side of the filter plate 5 is vertically fixed on the outer side of the synchronous belt 603, and the outer side of the brush rod 604 is densely covered with bristles, and the bristles on the front side of the brush rod 604 can be pressed against the surface of the filter plate 5, so that the bristles can be used to clean the inner side of the filter plate 5 during the subsequent rotation of the synchronous belt 603, thereby changing the disadvantage that the existing filter screen is easily pushed to the inside of the filter screen when cleaning from the outside, and the cleaning is more thorough, and the filter plate 5 is better unblocked.

[0028] As an optional embodiment, a baffle 301 supporting the filter plate 5 is fixed to the outer edge of the top opening of the casing 3, and a rotating hole 302 supporting the rotation of the rotating shaft 601 is vertically penetrated on the upper and lower sides of the casing 3, and a thrust bearing supporting the rotation of the rotating shaft 601 is arranged in the rotating hole 302, and a knob 605 convenient for hand-held rotation is fixed to the top of the rotating shaft 601, and pulleys 602 supporting the rotation of the synchronous belt 603 are arranged at both ends of the rotating shaft 601 inside the casing 3, and a mounting hole 304 for accommodating the installation of the fan 4 is arranged on the top side of the casing 3;

[0029] An air guide cover 305 is fixed at the bottom of the casing 3. The air guide cover 305 is a trumpet-shaped structure with a large mouth facing downward. A receiving hole 303 connected to the air guide cover 305 is vertically penetrated at the bottom of the casing 3. An air guide ring 402 is drivingly connected to the output end at the bottom of the fan 4. A plurality of groups of arc-shaped extending fan blades 401 are arranged around the top side of the air guide ring 402. The heat conduction box 2 is a hollow structure with an opening at the top. The bottom rear side of the heat conduction box 2 is connected to a water inlet pipe 201, and the top rear side of the heat conduction box 2 is connected to a water outlet pipe 202.

[0030] In addition, the top of the water outlet pipe 202 and the water inlet pipe 201 are connected with a serpentine-shaped heat dissipation pipe 203 to extend the extension length of the heat dissipation pipe 203 and improve the heat dissipation effect. A water pump is provided at the junction of the bottom of the heat conduction box 2 and the water inlet pipe 201, so that the water tank in the water inlet pipe 201 can be transported into the heat conduction box 2 through the water pump, thereby driving the coolant in the heat conduction box 2 to be transported into the heat dissipation pipe 203 along the upper water outlet pipe 202 to form a circulation. The heat dissipation pipe 203 is a copper pipe, and the heat dissipation pipe 203 extends above the top cover 7 and is tightly attached to the top cover 7;

[0031] The top cover 7 is fixed with fixing ears 701 extending downward to the outside of the heat conduction box 2 at the four corners, and a screw connecting the top cover 7 and the heat conduction box 2 is penetrated through the middle of the fixing ears 701. The middle of the filter plate 5 is densely covered with filter holes, and the outer ends of the bristles extend forward from the filter holes to ensure that the bristles on the outside of the brush rod 604 can clean and clear the filter holes on the surface of the filter plate 5 while following the movement of the synchronous belt 603.

[0032] With the above structure, when in use, the coolant is circulated among the heat conduction box 2, the water outlet pipe 202, the heat dissipation pipe 203 and the water inlet pipe 201 through the water pump in the heat conduction box 2, and the fan blades 401 of the fan 4 blow air downward to dissipate the heat of the heat dissipation pipe 203 and the top cover 7. The heat conduction box 2 transfers the heat of the resistor 1 to the internal coolant, and the coolant is introduced into the heat dissipation pipe 203 to achieve air cooling. The fan 4 draws air through the position of the filter plate 5. After long-term use causes the filter holes on the filter plate 5 to be blocked by impurities, the rotating knob 605 is rotated to drive the rotating shaft 601 to rotate, and the rotating shaft 601 is used to support the rotation of the synchronous belt 603 and the brush rod 604. The bristles on the outer side of the brush rod 604 clean and dredge the filter holes on the filter plate 5 to ensure the smoothness of the air intake of the filter plate 5.

[0033] A heat conduction box 2 containing coolant is arranged above the resistor 1 as a DC bias suppression device, the coolant is circulated in the water inlet pipe 201, the heat conduction box 2, the water outlet pipe 202 and the heat dissipation pipe 203 by a water pump, and the heat dissipation pipe 203 is cooled by air by a fan 4, thereby improving the heat dissipation effect of the resistor 1;

[0034] At the same time, a filter plate 5 is installed at the air inlet position of the casing 3 in front of the fan 4, and a rotatable synchronous belt 603 is provided to support a brush rod 604 as a brushing and cleaning part 6 for the filter holes on the filter plate 5, so that when the filter plate 5 is blocked, the filter plate 5 can be cleaned by rotating the synchronous belt 603 to support the brush rod 604, so as to unclog the blocked filter holes and make cleaning more convenient.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A DC bias suppression device, characterized in that: The invention comprises a resistor (1) and a heat-conducting box (2), wherein the heat-conducting box (2) is a door-shaped box body embedded in the outer side of the resistor (1), a housing (3) is arranged above the heat-conducting box (2), a top cover (7) supporting the housing (3) is arranged at the top opening of the heat-conducting box (2), a filter plate (5) is arranged at the front opening of the housing (3), a fan (4) for blowing air downwards is arranged inside the housing (3), and a cleaning unit (6) is arranged inside the housing (3); The cleaning portion (6) comprises two groups of synchronous belts (603) extending transversely to the rear side of the filter plate (5); two groups of rotating shafts (601) supporting the synchronous belts (603) to rotate are vertically penetrated in the middle of the synchronous belts (603); the top ends of the rotating shafts (601) pass downwardly out of the housing (3); a brush rod (604) abutting against the rear side of the filter plate (5) is vertically fixed to the outer side of the synchronous belt (603); the outer side of the brush rod (604) is densely covered with bristles.

2. A DC bias suppression device according to claim 1, characterized in that: A baffle (301) supporting the filter plate (5) is fixed on the outer edge of the top opening of the casing (3); a rotating hole (302) supporting the rotation of the rotating shaft (601) is vertically penetrated through the upper and lower sides of the casing (3); a knob (605) is fixed to the top of the rotating shaft (601); pulleys (602) supporting the rotation of the synchronous belt (603) are arranged at both ends of the rotating shaft (601) inside the casing (3); and a mounting hole (304) for accommodating the fan (4) is arranged on the top side of the casing (3).

3. A DC bias suppression device according to claim 2, characterized in that: An air guide cover (305) is fixed to the bottom of the casing (3), a receiving hole (303) connected to the air guide cover (305) is vertically penetrated through the bottom of the casing (3), an air guide ring (402) is drivingly connected to the output end at the bottom of the fan (4), and a plurality of groups of arc-shaped extending fan blades (401) are arranged around the top side of the air guide ring (402).

4. A DC bias suppression device according to claim 3, characterized in that: The heat conduction box (2) is a hollow structure with an opening at the top; the bottom rear side of the heat conduction box (2) is connected to a water inlet pipe (201), and the top rear side of the heat conduction box (2) is connected to a water outlet pipe (202).

5. A DC bias suppression device according to claim 4, characterized in that: The top ends of the water outlet pipe (202) and the water inlet pipe (201) are connected to a serpentine-shaped heat dissipation pipe (203), and a water pump is provided at the junction of the bottom of the heat conduction box (2) and the water inlet pipe (201).

6. A DC bias suppression device according to claim 5, characterized in that: The heat dissipation pipe (203) is a copper pipe, and the heat dissipation pipe (203) extends above the top cover (7) and is closely attached to the top cover (7).

7. A DC bias suppression device according to claim 6, characterized in that: The top cover (7) is fixed with fixing ears (701) extending downward to the outside of the heat conduction box (2) at the four corners, and a screw connecting the top cover (7) and the heat conduction box (2) is passed through the middle of the fixing ears (701).

8. A DC bias suppression device according to claim 7, characterized in that: The filter plate (5) has filter holes densely distributed in the middle, and the outer ends of the bristles extend forward from the filter holes.

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