Box-type substation

Abstract

The utility model relates to a box-type transformer station, which comprises a box body and a box door, two gas transmission pipes are arranged in the box body, each gas transmission pipe is provided with a plurality of nozzle groups, each nozzle group at least comprises an air nozzle, the two gas transmission pipes are communicated through a first pressure equalizing pipe, the first pressure equalizing pipe is arranged between the two adjacent nozzle groups, and the first pressure equalizing pipe is communicated with the air nozzle. The number of the first pressure equalizing pipes is two, a second pressure equalizing pipe is arranged between the two first pressure equalizing pipes, the second pressure equalizing pipe is communicated with a cold air conveying pipe, the cold air conveying pipe is provided with an adsorption tank, a heat exchanger, a regulating valve, a buffer tank, a one-way valve, an air compressor and an air filter, and the box door is provided with a breathable rainproof unit. The breathable rainproof unit comprises a vent hole and a rainproof cap. And potential safety hazards caused by humid air and condensation to electrical equipment running on the inner side of the transformer substation are reduced. The utility model has the advantages of convenient use and wide market prospect.

Description

Technical Field

[0001] The utility model relates to the field of box-type substations, and particularly relates to a box-type substation. Background Art

[0002] A box-type substation is a complete set of power distribution equipment that combines medium-voltage switchgear, transformers, and low-voltage power distribution equipment according to a certain wiring scheme. Compared with conventional civil substations, it has the advantages of small floor area, less on-site installation work, short installation period, free movement, reduced line loss, and less investment. Box-type substations are divided into two major categories: European box-type transformers and American box-type transformers. In European box-type transformers, the medium-voltage switchgear, transformers, and low-voltage power distribution equipment are separated and arranged in a "mu" shape or "pin" shape; American box-type transformers take the transformer as the main body, and the load switch, backup protection fuse, tap changer, and transformer are installed in the transformer oil tank, and the plug-in fuse, cable, and low-voltage power distribution part are arranged around the transformer oil tank to form an overall layout. The advantages of European box-type transformers are flexible structure and strong adaptability; the medium-voltage switchgear can use ring main units, vacuum ring main units, gas-insulated ring main units, etc. The main wiring scheme on the high-voltage side is flexible, and the transformer can use oil-immersed transformers or dry-type transformers.

[0003] Box-type substations are generally used outdoors, so a series of measures must be taken in terms of structure. Condensation must be prevented, otherwise flashover discharge will be caused; heat generation must be prevented, otherwise the equipment power will be reduced at least, and the equipment will be burned out at worst. The traditional natural ventilation method for cooling uses the air outside the box-type substation as a cold source and continuously conveys it into the box-type substation to cool the electrical equipment in the working state. However, for areas close to rivers or the sea at low altitudes, due to the excessive humidity itself, condensation will appear on the outer wall or inner wall of the box body of the substation during the day and night alternation, and the air humidity is relatively high due to the low altitude itself. The traditional natural ventilation cooling method is to inhale the air outside the box-type substation into the box-type substation as a cold source to cool the electrical equipment inside the box-type substation. Inhaling humid air itself poses a potential damage to the electrical equipment inside the box-type substation, and the probability of potential damage will increase exponentially if condensation is inhaled together during the process of inhaling humid air. Therefore, in the prior art, there is room for improvement in box-type substations built near rivers and the sea, so as to enable the box-type substations built in this area to operate continuously and normally, reduce the influence caused by humid air and condensation, and thus improve the promotion degree of this type of equipment. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides a box-type substation that reduces the potential safety hazards caused by humid air and condensation to the electrical equipment operating inside the substation, and is used to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is: a box-type substation, including a box body and a box door, two gas pipes are arranged in the box body, each gas pipe is provided with a plurality of nozzle groups, each nozzle group includes at least one air jet nozzle, the two gas pipes are connected through a first equalizing pressure pipe, the first equalizing pressure pipe is located between two adjacent nozzle groups, the number of the first equalizing pressure pipes is two, a second equalizing pressure pipe is arranged between the two first equalizing pressure pipes, a cold air delivery pipe is connected to the second equalizing pressure pipe, the cold air delivery pipe is sequentially provided with an adsorption tank, a heat exchanger, a regulating valve, a buffer tank, a one-way valve, an air compressor and an air filter in the direction from close to the second equalizing pressure pipe to far away from the second equalizing pressure pipe, and a breathable and rainproof unit is provided on the box door, the breathable and rainproof unit includes a vent opened on the box door and a rainproof cap arranged on the box door outside the vent.

[0006] Preferably, the number of air nozzles in each nozzle group is two, and each air nozzle includes a shell, a spray seat arranged on the bottom end of the shell, a cone arranged at the bottom of the spray seat, a connecting rod arranged on the spray seat and the cone, a through hole arranged on the spray seat outside the connecting rod, a spring arranged on the connecting rod above the spray seat, an adjusting nut arranged on the connecting rod above the spring, an end cover arranged on the top end of the shell, and a first sealing ring arranged between the end cover and the shell.

[0007] Preferably, each of the gas pipes adopts a circular tubular structure, a sealing head is provided on the end of each gas pipe, and a second sealing ring is provided between the sealing head and the gas pipe.

[0008] Preferably, the rain cap is a three-dimensional cover protruding outward, an opening is provided at the bottom end of the rain cap, the vent hole is located in the inner cavity of the rain cap, and the bottom end of the vent hole is located above the bottom end of the rain cap.

[0009] Preferably, a pressure sensor and a pressure relief valve are provided on the buffer tank, a first temperature sensor is provided on the cold air delivery pipe between the adsorption tank and the heat exchanger, a gas flow sensor is provided on the cold air delivery pipe between the adsorption tank and the second equalizing pressure pipe, and a second temperature sensor is provided on the box inside the breathable and rainproof unit.

[0010] Preferably, a third pressure-equalizing tube is arranged between the two first pressure-equalizing tubes, and the number of the third pressure-equalizing tubes is two, and the two third pressure-equalizing tubes are symmetrically distributed on both sides of the second pressure-equalizing tube.

[0011] Preferably, the two first pressure-equalizing tubes are parallel to each other, and two parallel support beams are arranged below the two first pressure-equalizing tubes. The cross-section of the support beam is I-shaped, and the support beam and the first pressure-equalizing tube are perpendicular to each other. A clamp is arranged on the first pressure-equalizing tube, and screws are arranged on the clamp and the support beam, and fastening bolts are arranged on the screw.

[0012] The beneficial effects of the utility model are as follows: firstly, the utility model utilizes an air compressor to compress external air to form compressed air, and the compressed air is indirectly cooled by heat exchange with a cold source medium in a heat exchanger, and finally the adsorption tank adsorbs the cooled compressed air to form a cold air flow with moisture removed, thereby overcoming the influence of excess moisture in the air on the electrical equipment in the box-type substation, and the air flow after heat exchange is discharged through the vent and the rainproof cap, and the rainproof cap itself can reduce the condensation entering the inner cavity of the box, and then the air flow continuously transported outward through the rainproof cap forms a partition, which further reduces the probability of condensation entering the inner cavity of the box-type substation, thereby reducing the safety hazard caused by humid air and condensation to the electrical equipment running inside the substation.

[0013] Secondly, a pressure sensor and a pressure relief valve are arranged on the buffer tank of the utility model. The pressure sensor is installed to facilitate pressure feedback, and the pressure relief valve is installed to facilitate pressure relief.

[0014] Finally, a first temperature sensor is provided on the cold air delivery pipe between the adsorption tank and the heat exchanger described in the utility model, and a second temperature sensor is provided on the box inside the breathable and rainproof unit; the first temperature sensor and the second temperature sensor are installed to facilitate the feedback of temperature parameters.

[0015] The utility model has the advantages of simple structure, convenient operation, ingenious design, greatly improved working efficiency, good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 A partial enlarged schematic diagram of detail A.

[0018] Figure 3 for Figure 1 A partial enlarged schematic diagram of detail B.

[0019] Figure 4 It is a structural schematic diagram of the components of the utility model.

[0020] Figure 5 It is a structural schematic diagram of the utility model.

[0021] Figure 6 for Figure 5 A partial enlarged schematic diagram of detail C. DETAILED DESCRIPTION

[0022] like Figures 1 to 6As shown, a box-type substation includes a box body 1 and a box door 2. Two gas pipes 3 are arranged in the box body 1. Each gas pipe 3 is provided with a plurality of nozzle groups. Each nozzle group includes at least one air jet nozzle. The two gas pipes 3 are connected through a first equalizing pressure pipe 4. The first equalizing pressure pipe 4 is located between two adjacent nozzle groups. The number of the first equalizing pressure pipes 4 is two. A second equalizing pressure pipe 5 is arranged between the two first equalizing pressure pipes 4. The second equalizing pressure pipe 5 is connected with a cold air delivery pipe 6. The cold air delivery pipe 6 is provided with an adsorption tank 7, a heat exchanger 8, a regulating valve 9, a buffer tank 10, a one-way valve 11, an air compressor 12 and an air filter 13 in sequence along the direction from close to the second pressure equalizing pipe 5 to far away from the second pressure equalizing pipe 5. The adsorption tank 7 includes an adsorption tank body and a molecular sieve layer provided in the adsorption tank body. The box door 2 is provided with a breathable and rainproof unit, and the breathable and rainproof unit includes a vent hole 14 provided on the box door 2 and a rainproof cap 15 provided on the box door 2 outside the vent hole 14. The buffer tank 10 is provided with a pressure sensor 27 and a pressure relief valve 28. The cold air delivery pipe 6 between the adsorption tank 7 and the heat exchanger 8 is provided with a first temperature sensor 29. The cold air delivery pipe 6 between the adsorption tank 7 and the second pressure equalizing pipe 5 is provided with a gas flow sensor 30. The box body 1 inside the breathable and rainproof unit is provided with a second temperature sensor 31. The door 2 and the second pressure equalizing pipe 5 are provided with a connecting pipe 37, and the cold air delivery pipe 6 and the second pressure equalizing pipe 5 are connected through the connecting pipe 37. Each of the gas delivery pipes 3 is a circular tubular structure, and a sealing head 25 is provided at the end of each gas delivery pipe 3, and a second sealing ring 26 is provided between the sealing head 25 and the gas delivery pipe 3.

[0023] The number of air nozzles in each nozzle group is one or two, and each air nozzle includes a housing 16, a spray seat 17 disposed on the bottom end of the housing 16, a cone 18 disposed at the bottom of the spray seat 17, a connecting rod 19 disposed on the spray seat 17 and the cone 18, a through hole 20 disposed on the spray seat 17 outside the connecting rod 19, a spring 21 disposed on the connecting rod 19 above the spray seat 17, an adjusting nut 22 disposed on the connecting rod 19 above the spring 21, an end cap 23 disposed on the top end of the housing 16, and a first sealing ring 24 disposed between the end cap 23 and the housing 16. The adjusting nut 22 is threadedly connected to the connecting rod 19, and the compression of the spring 21 is adjusted by adjusting the position of the adjusting nut 22 on the connecting rod 19, thereby adjusting the pressure required when the spray seat 17 and the cone 18 are separated.

[0024] The part of the vertebral body 18 close to the connecting rod 19 adopts a truncated cone structure, the central axis of the vertebral body 18 and the central axis of the connecting rod 19 are located on the same axis, and the number of through holes 20 is a plurality of through holes 20, which are evenly distributed in a star shape outside the central axis of the connecting rod 19. The connection between the shell 16 and the air pipe 3 is located above the through hole 20. The provision of a plurality of through holes 20 facilitates the uniform delivery of the cooling airflow delivered through the air pipe 3 to the inner cavity of the nozzle seat 17 below the through hole 20, so that the resultant force of the pressure in the inner cavity of the nozzle seat 17 on the vertebral body 18 is located in the direction of the central axis of the connecting rod 19, thereby driving the vertebral body 18 to slide along the central axis of the connecting rod 19.

[0025] The rain cap 15 is a three-dimensional cover protruding outward, with an opening at the bottom end of the rain cap 15, and the vent hole 14 is located in the inner cavity of the rain cap 15, and the bottom end of the vent hole 14 is located above the bottom end of the rain cap 15. The airflow after heat exchange is discharged outward through the vent hole 14 and forms a deflection through the inner wall of the rain cap 15 and then discharged from the opening of the rain cap 15, thereby preventing condensation from entering the inner cavity of the box body 1 through the vent hole 14.

[0026] A third pressure equalizing tube 32 is arranged between the two first pressure equalizing tubes 4. The number of the third pressure equalizing tubes 32 is two, and the two third pressure equalizing tubes 32 are symmetrically distributed on both sides of the second pressure equalizing tube 5. The two first pressure equalizing tubes 4 and the two third pressure equalizing tubes 32 form a uniform ring to receive the pressurized airflow delivered by the second pressure equalizing tube 5, thereby reducing the pressure difference of the gas delivery pipes 3 adjacent to several nozzle groups. Thus, the difficulty of adjusting the air nozzles in the nozzle group is reduced.

[0027] The two first pressure-equalizing tubes 4 are parallel to each other, and two parallel support beams 33 are arranged below the two first pressure-equalizing tubes 4. The cross section of the support beam 33 is I-shaped, and the support beam 33 and the first pressure-equalizing tube 4 are perpendicular to each other. A clamp 34 is arranged on the first pressure-equalizing tube 4, and a screw 35 is arranged on the clamp 34 and the support beam 33, and a fastening bolt 36 is arranged on the screw 35. This facilitates the support and fixation of the first pressure-equalizing tube 4.

[0028] The method of using this product is as follows: Figures 1 to 6 As shown, the following steps are included:

[0029] S1. Start the air compressor 12. The outside air is filtered by the air filter 13 and enters the cold air delivery pipe 6 and then enters the buffer tank 10 for buffering. After the pressure sensor 27 on the buffer tank 10 feeds back the pressure and adjusts the opening of the regulating valve 9, the buffer tank 10 continuously delivers compressed air to the heat source channel of the heat exchanger 8 and continuously delivers circulating water or cooling liquid to the cold source channel of the heat exchanger 8 for countercurrent heat exchange. The compressed air is cooled after passing through the heat source channel of the heat exchanger 8.

[0030] S2. After the cooled compressed air is fed back the temperature by the first temperature sensor 29, it is sent to the adsorption tank 7 to adsorb the moisture contained in the cooled compressed air, and then continues to move forward along the cold air delivery pipe 6, and after the flow is fed back by the gas flow sensor 30, it is delivered to the second equalizing pressure pipe 5 through the connecting pipe 37, and then the second equalizing pressure pipe 5 is delivered to the equalizing pressure ring composed of two third equalizing pressure pipes 32 and two first equalizing pressure pipes 4, and then the equalizing pressure ring supplies the compressed air with moisture removed to several nozzle groups.

[0031] S3. After the air jet in the nozzle group receives the compressed air, it causes the cone 18 and the nozzle seat 17 to separate, thereby delivering a cooling airflow to the inner cavity of the box body 1 for heat exchange with the electrical equipment in the working state in the inner cavity of the box body 1. After the airflow after heat exchange is fed back by the second temperature sensor 31, the airflow after heat exchange is discharged outwardly through the breathable and rainproof unit on the door 2. Specifically, the airflow first passes through the air vent 14 and then passes through the inner cavity of the rainproof cap 15 and is discharged through the bottom end of the rainproof cap 15; when the temperature fed back by the second temperature sensor 31 exceeds the preset range, the flow rate of the cooling airflow delivered to the inner cavity of the box body 1 can be increased by adjusting the opening of the regulating valve 9, thereby increasing the amount of cold source delivered per minute, and further reducing the temperature of the airflow discharged outwardly through the breathable and rainproof unit after heat exchange.

[0032] Through this embodiment, the utility model utilizes the air compressor 12 to compress the outside air to form compressed air, and the compressed air is indirectly cooled by heat exchange with the cold source medium in the heat exchanger 8, and finally the adsorption tank 7 adsorbs the cooled compressed air to form a cold air flow with moisture removed, thereby overcoming the influence of excess moisture in the air on the electrical equipment in the box-type substation, and the air flow after heat exchange is discharged through the vent 14 and the rain cap 15. On the basis that the rain cap 15 itself can reduce the condensation entering the inner cavity of the box body 1, the air flow continuously transported outward through the rain cap 15 forms a partition, which further reduces the probability of condensation entering the inner cavity of the box-type substation, thereby reducing the safety hazards caused by humid air and condensation to the electrical equipment running inside the substation.

[0033] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A box-type substation, comprising a box body (1) and a box door (2), characterized in that: Two air delivery pipes (3) are arranged in the box body (1), each air delivery pipe (3) is provided with a plurality of nozzle groups, each nozzle group includes at least one air jet nozzle, the two air delivery pipes (3) are connected via a first pressure equalizing pipe (4), the first pressure equalizing pipe (4) is located between two adjacent nozzle groups, the number of the first pressure equalizing pipes (4) is two, a second pressure equalizing pipe (5) is arranged between the two first pressure equalizing pipes (4), the second pressure equalizing pipe (5) is connected with a cold air delivery pipe (6), and the cold air delivery pipe (6) is connected to the second pressure equalizing pipe (5). The delivery pipe (6) is provided with an adsorption tank (7), a heat exchanger (8), a regulating valve (9), a buffer tank (10), a one-way valve (11), an air compressor (12) and an air filter (13) in sequence along a direction from close to the second pressure equalizing pipe (5) to far away from the second pressure equalizing pipe (5), and a breathable and rainproof unit is provided on the box door (2), wherein the breathable and rainproof unit comprises a vent hole (14) provided on the box door (2) and a rainproof cap (15) provided on the box door (2) outside the vent hole (14).

2. The box-type substation according to claim 1 is characterized in that: The number of air nozzles in each nozzle group is two, and each air nozzle comprises a shell (16), a spray seat (17) arranged at the bottom end of the shell (16), a cone (18) arranged at the bottom of the spray seat (17), a connecting rod (19) arranged on the spray seat (17) and the cone (18), a through hole (20) arranged on the spray seat (17) outside the connecting rod (19), a spring (21) arranged on the connecting rod (19) above the spray seat (17), an adjusting nut (22) arranged on the connecting rod (19) above the spring (21), an end cover (23) arranged on the top end of the shell (16), and a first sealing ring (24) arranged between the end cover (23) and the shell (16).

3. The box-type substation according to claim 1 is characterized in that: Each of the gas delivery pipes (3) is of a circular tubular structure, and a sealing head (25) is provided at the end of each gas delivery pipe (3), and a second sealing ring (26) is provided between the sealing head (25) and the gas delivery pipe (3).

4. The box-type substation according to claim 1 is characterized in that: The rain cap (15) is a three-dimensional cover protruding outwards. An opening is provided at the bottom end of the rain cap (15). The vent hole (14) is located in the inner cavity of the rain cap (15). The bottom end of the vent hole (14) is located above the bottom end of the rain cap (15).

5. The box-type substation according to claim 1 is characterized in that: The buffer tank (10) is provided with a pressure sensor (27) and a pressure relief valve (28); the cold air delivery pipe (6) between the adsorption tank (7) and the heat exchanger (8) is provided with a first temperature sensor (29); the cold air delivery pipe (6) between the adsorption tank (7) and the second pressure equalizing pipe (5) is provided with a gas flow sensor (30); and the box (1) inside the breathable and rainproof unit is provided with a second temperature sensor (31).

6. The box-type substation according to claim 1, characterized in that: A third pressure equalizing tube (32) is arranged between the two first pressure equalizing tubes (4), the number of the third pressure equalizing tubes (32) is two, and the two third pressure equalizing tubes (32) are symmetrically distributed on both sides of the second pressure equalizing tube (5).

7. The box-type substation according to claim 1 is characterized in that: The two first pressure-equalizing tubes (4) are parallel to each other. Two support beams (33) are arranged below the two first pressure-equalizing tubes (4). The cross section of the support beam (33) is an I-shaped beam. The support beam (33) and the first pressure-equalizing tube (4) are perpendicular to each other. A clamp (34) is arranged on the first pressure-equalizing tube (4). A screw (35) is arranged on the clamp (34) and the support beam (33). A fastening bolt (36) is arranged on the screw (35).

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