CN111430110B - Cooling system of power transformer of underground substation - Google Patents
Cooling system of power transformer of underground substation Download PDFInfo
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- CN111430110B CN111430110B CN202010380118.7A CN202010380118A CN111430110B CN 111430110 B CN111430110 B CN 111430110B CN 202010380118 A CN202010380118 A CN 202010380118A CN 111430110 B CN111430110 B CN 111430110B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B7/00—Enclosed substations, e.g. compact substations
- H02B7/06—Distribution substations, e.g. for urban network
- H02B7/08—Underground substations
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- Power Engineering (AREA)
- Transformer Cooling (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of power transformers, in particular to a cooling system of a power transformer of an underground substation. The specific technical scheme is as follows: a cooling system of a power transformer of an underground substation comprises a transformer chamber and a transformer, wherein the transformer chamber is positioned underground, the transformer is arranged in the transformer chamber, a first cooling device is arranged outside the transformer chamber and comprises a cooling box and a first air inlet pipe, the first air inlet pipe is arranged on the side wall of the cooling box and extends out of the ground, a first air outlet pipe is arranged on the other side wall of the cooling box corresponding to the first air inlet pipe, and the first air outlet pipe is connected with the first air outlet pipe through a plurality of first air outlet branch pipes extending into the transformer chamber; a cooling area and a drying area are sequentially arranged between the first air inlet pipe and the first air outlet pipe in the cooling box. The cooling system disclosed by the invention circularly dissipates heat in the transformer chamber, so that the running environment of the transformer is continuously kept under a safe temperature condition.
Description
Technical Field
The invention relates to the technical field of power transformers, in particular to a cooling system of a power transformer of an underground substation.
Background
The urban power supply facility is an important component of the urban infrastructure, and with the continuous acceleration of the urbanization process, the construction of all underground substations tends to be great, the types of equipment in the underground substations are various, the heat dissipation capacity is large, and the requirements for ensuring the safe operation of the equipment are high. Therefore, heat dissipation of the transformer in the underground substation is required. At present, the common method is a circulating forced oil cooling mode, and the purpose of cooling the transformer is achieved by radiating the transformer body. However, the underground substation has a lot of devices, and each transformer is oil-cooled, so that the whole cooling system is complex and the workload of operation and maintenance is large. Moreover, the transformer setting is indoor at the transformer, because the operation of indoor a plurality of equipment, can make the indoor temperature of transformer also increase, only cools down to the transformer body, and does not cool down in the transformer room, can lead to the transformer at the in-process of cooling down, and external temperature also heats it simultaneously for the radiating effect of transformer is not good.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a cooling system of a power transformer of an underground substation, which circularly dissipates heat in a transformer chamber to continuously keep the running environment of the transformer under a safe temperature condition.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention discloses a cooling system of a power transformer of an underground substation, which comprises an underground transformer chamber and a transformer arranged in the transformer chamber, and is characterized in that: a first cooling device is arranged outside the transformer chamber and comprises a cooling box and a first air inlet pipe which is arranged on the side wall of the cooling box and extends out of the ground, a fan is arranged in the first air inlet pipe, a first air outlet pipe is arranged on the other side wall of the cooling box corresponding to the first air inlet pipe, and the first air outlet pipe is connected with the first air outlet branch pipe extending into the transformer chamber through a plurality of first air outlet branch pipes; a cooling area and a drying area are sequentially arranged in the cooling box from a first air inlet pipe to a first air outlet pipe, cooling plates and drying plates for cooling and drying air are respectively arranged in the cooling area and the drying area in an up-down staggered manner, and the heights of the cooling plates and the drying plates are smaller than that of the cooling box, so that the path of the air passing through the cooling area and the drying area is in a snake shape; the number of the first air outlet branch pipes is two, and one end extending into the transformer chamber is provided with air hoods which are respectively positioned on two opposite sides of the diagonal of the transformer; a strip-shaped hole is transversely formed in the bottom, close to the cooling box, of the drying plate; the strip-shaped holes are completely covered by strip-shaped plates arranged in the direction facing the first air outlet pipe, springs are fixed on the surfaces of the strip-shaped plates corresponding to the drying plates, the other ends of the springs penetrate through and extend out of the drying plates, and a baffle is fixed at one end extending out of the drying plates.
Preferably, a plurality of partition plates are vertically arranged in the cooling box along the length direction of the cooling box, and two ends of each partition plate are fixed on the cooling plate and the drying plate close to the first air inlet pipe and the first air outlet pipe; and the partition plate is provided with a strip-shaped groove matched with the cooling plate and the drying plate.
Preferably, the air hood is arranged at a position 3/4-4/5 away from the ground of the transformer room.
Preferably, a second cooling device is arranged outside the transformer chamber opposite to the first cooling device, the second cooling device comprises a cooling cylinder, a second air inlet pipe extending out of the ground is arranged at the top of the cooling cylinder, a second air outlet pipe laid on the bottom surface outside the transformer chamber is arranged at the bottom of the cooling cylinder, and a fan is also arranged in the second air inlet pipe; and a plurality of third air outlet pipes extending into the transformer chamber and surrounding the transformer are arranged on the second air outlet pipe, and the outlets of the third air outlet pipes face the transformer.
Preferably, a heat exchange cylinder is arranged in the cooling cylinder, a plurality of heat exchange channels are vertically arranged on the heat exchange cylinder, a transverse plate is arranged at the bottom of the heat exchange cylinder, a plurality of inverted-truncated-cone-shaped through holes are formed in the transverse plate, and the maximum diameter of each inverted-truncated-cone-shaped through hole is larger than that of each heat exchange channel; the transverse plate is made of activated carbon.
Preferably, a cavity is arranged between the adjacent circular truncated cone-shaped through holes and at the position below the middle part of the heat exchange cylinder, activated carbon is filled in the cavity, and a plurality of micropores communicated with the cavity are arranged on the inner wall of the heat exchange channel.
Preferably, the part of the third air outlet pipe extending into the transformer chamber is a telescopic bent pipe, and a groove matched with the telescopic bent pipe is arranged on the ground in the transformer chamber and below an elbow of the telescopic bent pipe, so that the telescopic bent pipe is completely arranged in the groove after being compressed.
Preferably, an exhaust pipe with an exhaust hood is arranged at the top in the transformer chamber, and the exhaust pipe extends out of the ground; and a fan is also arranged in the exhaust pipe.
Preferably, the first air inlet pipe, the second air inlet pipe and the exhaust pipe are connected through a three-way pipe joint, at least one branch air pipe is arranged on each of the first air inlet pipe and the second air inlet pipe, and an electronic valve is arranged on each branch air pipe; and the fans in the first air inlet pipe, the second air inlet pipe and the exhaust pipe are respectively connected with a fan speed regulating device.
The invention has the following beneficial effects:
the invention is provided with two cooling devices outside the transformer chamber, and the two cooling devices can be used jointly or independently. When the cooling device is used independently, the two cooling devices are cooled by using the low temperature in the soil layer outside the transformer chamber, so that the air pumped into the cooling devices from the outside is cooled and dried, and the temperature in the transformer chamber is cooled. When the air-cooling type transformer is used in a combined mode, air pumped into the first cooling device is pumped out of the transformer chamber through the second cooling device, hot air in the transformer chamber is pumped out and cooled through the second cooling device, the cooled air enters the first cooling device again for further cooling, and finally low-temperature air is blown into the transformer chamber, so that circulation is carried out, the air in the transformer chamber is continuously cooled and replaced, and the purpose of cooling the transformer is achieved. In the whole cooling process, the rotating speed of the fan and the starting time of different fans are controlled by the controller, other electrical equipment is not needed, the control process is simple, and the maintenance is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention (the first cooling device and the second cooling device are not shown in section);
FIG. 2 is a schematic view of a first cooling device;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is a view taken along line A-A of FIG. 2;
FIG. 5 is a schematic view of a separator plate structure;
FIG. 6 is a view taken along line B-B of FIG. 1;
FIG. 7 is a diagram of the distribution of the second outlet duct at the bottom of the transformer chamber;
FIG. 8 is a schematic view of a second cooling device;
FIG. 9 is a view taken along line C-C of FIG. 8;
FIG. 10 is a top plan view of the connection of the first inlet duct, the second inlet duct, and the exhaust duct to the ground (FIG. 10 is another embodiment, in which the first cooling device, the second cooling device, and the exhaust duct are used in combination);
in the figure: the device comprises a transformer chamber 1, a transformer 2, a cooling box 3, a first air inlet pipe 4, a first air outlet pipe 5, a first air outlet branch pipe 6, a cooling plate 7, a drying plate 8, a partition plate 9, a strip-shaped groove 10, an air cover 11, a cooling cylinder 12, a second air inlet pipe 13, a second air outlet pipe 14, a third air outlet pipe 15, a telescopic bent pipe 151, a heat exchange cylinder 16, a heat exchange channel 17, a transverse plate 18, a circular truncated cone-shaped through hole 19, a cavity 20, a groove 21, an exhaust pipe 22, a branch air pipe 23, a water collecting groove 24, a strip-shaped hole 25, a spring 26, a baffle plate 27 and a strip-shaped plate 28.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.
Referring to fig. 1 to 9, the present invention discloses a cooling system of a power transformer of an underground substation, including a transformer room 1 located underground and a transformer 2 disposed in the transformer room 1, the transformer 2 being located at a middle position of the transformer room 1. The first cooling device is arranged outside the transformer room 1, i.e. the cooling device is buried in the soil layer outside the transformer room 1, since the temperature in the soil layer is lower than the temperature in the transformer room 1 and on the ground. Therefore, the cooling device is arranged in the soil layer, the effect of cooling the cooling device can be achieved, and the air cooling effect through the cooling device is better. First cooling device includes cooler bin 3 and sets up on the 3 lateral walls of cooler bin and stretch out the first intake pipe 4 on ground, is provided with the fan in the first intake pipe 4, is connected with fan speed adjusting device on the fan, adjusts the rotational speed of fan, increases the intake. In the invention, the fan is preferably an axial flow fan, and external air is pumped into the cooling box 3 for heat exchange and then blown into the transformer chamber 1, thereby cooling the transformer chamber 1.
A first air outlet pipe 5 is arranged on the other side wall of the cooling box 3 corresponding to the first air inlet pipe 4, and the first air outlet pipe 5 is connected through a plurality of first air outlet branch pipes 6 extending into the transformer chamber 1; in the present invention, the number of the first outlet branch pipes 6 is preferably two, and one end extending into the transformer chamber 1 is provided with the air hoods 11, and the two air hoods 11 are respectively located at two opposite corners of the transformer 2, so that the air blown into the transformer chamber 1 forms a vortex around the transformer 2, thereby cooling the transformer 2. In order to improve the temperature reduction effect of the transformer, the air hood 11 is arranged at the positions 3/4-4/5 away from the ground of the transformer room 1. Since the cool air blown into the transformer room 1 sinks and the hot air rises, an exhaust duct 22 having an exhaust hood is provided at the inner top of the transformer room 1, and the exhaust duct 22 protrudes from the ground. And a fan, preferably an axial fan, is arranged in the exhaust duct 22, and a fan speed regulating device is connected to the fan, so that the hot air gathered at the top of the transformer room 1 is extracted. Since the exhaust pipes 22 extend through the soil layer to the ground, the hot air partially exchanges heat with the hot air when passing through the exhaust pipes 22 located in the soil layer, so that the temperature of the air to be extracted is lowered. Of course, the exhaust pipes 22 may also be arranged in a serpentine shape in the ground above the transformer room 1, thereby increasing the cooling effect.
The cooling area and the drying area are sequentially arranged between the first air inlet pipe 4 and the first air outlet pipe 5 in the cooling box 3, the cooling area and the drying area are respectively provided with a cooling plate 7 and a drying plate 8 which cool and dry the air blown into the cooling box 3 by the first air inlet pipe 4 in an up-down staggered manner, the height of the cooling plate 7 and the height of the drying plate 8 are smaller than that of the cooling box 3, and the path of the air passing through the cooling area and the drying area is in a snake shape. It should be understood that: the cooling area is composed of a cooling plate 7, the drying area is composed of a drying plate 8, and the drying plate 8 is mainly used for drying air with moisture or vapor cooled by the cooling plate 7, so that the condition that the air blown into the transformer room 1 is wet and damages or rusts equipment in the transformer room 1 is avoided. The cooling plates 7 are fixed to the top and bottom of the cooling box 3 and are staggered, as are the drying plates 8.
When the outside air enters the cooling box 3, the outside air sequentially passes through the gap between the cooling plate 7 and the inner wall of the cooling box 3 and enters the drying region. The cooling plate 7 is made of metal, so that heat exchange between the cooling plate and air is realized, and the purpose of cooling the air entering the cooling box 3 is achieved. During the heat exchange, water vapor is formed on the surface of the cooling plate 7 and the inner wall of the cooling box 3, and eventually drops are formed. Therefore, the bottom of the cooling plate 7 fixed to the top of the cooling tank 3 is set to be an inclined surface inclined toward the bottom of the cooling tank 3, so that condensed liquid droplets are more likely to fall; and a water collecting tank 24 is arranged at the inner bottom of the cooling tank 3 and below the cooling plate 7 (the cooling plate 7 fixed at the top of the cooling tank 3), the water collecting tank 24 faces the center of the bottom of the cooling plate 7 (the cooling plate 7 fixed at the top of the cooling tank 3) and inclines below the cooling tank 3, so that falling liquid drops are collected, a drain pipe is arranged at the lowest position of the bottom of the water collecting tank 24, a one-way valve is arranged on the drain pipe, water in the soil is prevented from entering the cooling tank 3, and the drain pipe is fixed at the outer bottom of the cooling tank 3 and drains the water into the soil. Furthermore, water collection troughs 24 are arranged between two adjacent cooling plates 7 and between the cooling plates 7 and the inner side walls of the cooling boxes 3, wherein the cooling plates 7 refer to the cooling plates 7 fixed at the bottom of the cooling boxes 3.
In order to achieve a better cooling effect, the drying plate 8 is made of a metal material, the inside of the drying plate 8 is hollow, activated carbon is filled in the drying plate 8, meanwhile, a plurality of air holes communicated with the inside of the drying plate 8 are uniformly distributed on the two side plate surfaces of the drying plate 8, so that air passes through the activated carbon through the air holes and overflows from the air holes on the other side, and the cooled air is dried.
Furthermore, in order to increase the hot air entering the cooling box 3 and perform heat exchange better and faster, a plurality of partition plates 9 are vertically arranged in the cooling box 3 along the length direction of the cooling box, and two ends of each partition plate 9 are fixed on a cooling plate 7 and a drying plate 8 which are close to the first air inlet pipe 4 and the first air outlet pipe 5; the partition plate 9 is provided with a strip-shaped groove 10 matched with the cooling plate 7 and the drying plate 8, and the strip-shaped groove 10 is divided into an opening facing downwards and corresponds to the cooling plate 7 and the drying plate 8 in the cooling box 3. It should be understood that: the partition plate 9 is not arranged in the area between the inner wall of the cooling box 3 and the plate surfaces of the cooling plate 7 and the drying plate 8, and the influence of the partition plate 9 on air inlet and air outlet is avoided. The baffle 9 inserts on the cooling plate 7 and the drying plate 8 of cooler bin 3 bottom through opening bar groove 10 down, and the cooling plate 7 and the drying plate 8 at cooler bin 3 top then insert on the baffle 9 through opening bar groove 10 up to separate into a plurality of compartments with cooling plate 7 and baffle 9, baffle 9 is the metal sheet equally, thereby increases air heat transfer's area of contact.
Furthermore, the air is not dehumidified well because a part of the air passes through the gap between the drying plate 8 and the inner wall of the cooling box 3 when passing through the drying region. Consequently, fix the height of the drying plate 8 at cooling box 3 top the same with the height of cooling box 3, its bottom surface is fixed in the bottom of cooling box 3, on drying plate 8, bar hole 25 has transversely been seted up to the bottom that is close to cooling box 3, on bar hole 25, be provided with the bar board 28 that covers bar hole 25 completely in the direction of first outlet duct 5, be fixed with spring 26 on bar board 28 and the corresponding face of drying plate 8, spring 26's the other end passes and stretches out drying plate 8, and the one end that stretches out drying plate 8 is fixed with baffle 27. In a natural state, the surfaces of the strip-shaped plate 28 and the baffle plate 27 are attached to the surface of the drying plate 8. The strip 28 is made of the same material and has the same structure as the drying plate 8. The drying plate 8 is arranged on the drying plate 8, so that the air cannot rapidly pass through a drying area under the condition that the air flow rate is high, the pressure in the cooling box 3 is high, the cooling box 3 or other equipment is damaged, and therefore when the air flow rate is high and the pressure in the cooling box 3 is increased, the air can push the strip-shaped plate 28 open, the air penetrates out through the strip-shaped hole 25, and the pressure in the cooling box 3 is relieved.
It should be noted that: the strip-shaped plates 28 and other components can be arranged on all the drying plates 8, or on the top of the drying plates 8 fixed at the bottom of the cooling box 3, or alternatively, the strip-shaped plates 28 can be arranged on any one drying plate 8, and the number of the strip-shaped plates 28 can be equal to or less than the number of the drying plates 8, or can be arranged according to actual situations. The arrangement of the partition 9 divides the drying plate 8 into several sections, so that the strip-shaped plate 28 is arranged on each section of the drying plate 8 provided with the strip-shaped plate 28 and separated by the partition 9, and the arrangement of the partition 9 is divided into 3 sections, so that the strip-shaped plate 28 is arranged on each section of the drying plate 8 separated by the partition 9. Of course, the arrangement of the strip-shaped plate 28 leads to a certain specificity of the drying plate 8, and therefore the partition 9 is adapted according to the arrangement of the drying plate 8, i.e. the drying plate 8 is divided into several parts, and as shown in fig. 4 to 5, the partition 9 located in the drying zone is divided into two n-type and one m-type plates.
The second cooling device is arranged outside the transformer room 1 opposite to the first cooling device and comprises a cooling cylinder 12, the bottom of the cooling cylinder 12 is funnel-shaped, so that air can enter the second air outlet pipe 14 in a centralized manner, a second air inlet pipe 13 extending out of the ground is arranged at the top of the cooling cylinder 12, the second air outlet pipe 14 laid on the bottom surface outside the transformer room 1 is arranged at the bottom of the cooling cylinder 12, a plurality of third air outlet pipes 15 extending into the transformer room 1 and surrounding the transformer 2 are arranged on the second air outlet pipes 14, and the outlets of the third air outlet pipes 15 face the transformer 2. It should be noted that: the first cooling device and the second cooling device are correspondingly arranged and are also arranged in the soil layer outside the transformer room 1. A fan, preferably an axial flow fan, is arranged in the second air inlet pipe 13, and fan speed adjusting devices are arranged on the fans.
A heat exchange cylinder 16 is arranged in the cooling cylinder 12, a plurality of heat exchange channels 17 are vertically arranged on the heat exchange cylinder 16, a transverse plate 18 is arranged at the bottom of the heat exchange cylinder 16, a plurality of inverted-frustum-shaped through holes 19 are arranged on the transverse plate 18, and the maximum diameter of each inverted-frustum-shaped through hole 19 is larger than that of each heat exchange channel 17; the transverse plate 18 is made of activated carbon. It should be noted that: the length of the heat exchange cylinder 16 is less than the height of the cooling cylinder 12, and the outside hot air exchanges heat in the heat exchange cylinder 16. The cross-section of bar passageway 17 is the hexagon, increases the area of contact of air with heat exchanger tube 16, consequently, whole heat exchanger tube 16's cross-section is honeycomb, and has certain distance between every bar passageway 17, and be not closely set up, and be solid between the adjacent bar passageway 17. In order to prevent water vapor generated by outside hot air in the heat exchange process and further condensed water drops and water vapor carried in the air after heat exchange from entering the transformer chamber 1, a cavity 20 is arranged between the adjacent circular truncated cone-shaped through holes 19 at the position below the middle part of the heat exchange cylinder 16, activated carbon is filled in the cavity 20, and a plurality of micropores communicated with the cavity 20 are arranged on the inner wall of the heat exchange channel 17. When the condensed droplets flow down along the heat exchange channel 17, the droplets flowing down will enter the micropores and be adsorbed by the activated carbon in the cavity 20. The inside of the transverse plate 18 is also filled with activated carbon, the large diameter surface of the circular truncated cone-shaped through hole 19 faces the heat exchange cylinder 16, and the small diameter surface faces the second air outlet pipe 14. When the outside air enters the heat exchange cylinder 16 in the cooling cylinder 12, the pressure of the air entering the heat exchange cylinder 16 will increase because the cross-sectional area of all the heat exchange channels 17 on the heat exchange cylinder 16 is smaller than the diameter of the cooling cylinder 12. When the air passes through the transverse plate 18, the pressure is further increased (the bottom surface of the circular truncated cone-shaped through hole 19 on the transverse plate 18 has a smaller aperture, so that the air is further pressurized), the air with certain pressure enters the second air outlet pipe 14 and is sprayed out at a certain speed from the third air outlet pipe 15, and the flow rate of the air in the transformer chamber 1 is increased.
Furthermore, the part of the third outlet pipe 15 extending into the transformer chamber 1 is a telescopic elbow 151, and a groove 21 matched with the telescopic elbow 151 is arranged on the ground in the transformer chamber 1 and below the elbow of the telescopic elbow 151, so that the telescopic elbow 151 is completely arranged in the groove 21 after being compressed. It should be understood that: the outlet of the extension bent tube 151 in the direction of the bend is disposed toward the transformer 2. The telescopic elbow 151 can be compressed into the third outlet duct 15 and its end is completely placed in the recess 21 and flush with the bottom surface in the transformer chamber 1.
Furthermore, the first cooling device and the second cooling device can be independently used, and the second cooling device is used as a spare, so that the structure is simple and the cost is low. The second cooling device is activated when the first cooling device fails. Of course, the first cooling device and the second cooling device may be used simultaneously. Also, since the second outlet duct 14 is laid on the outer bottom surface of the transformer room 1, the telescopic elbow 151 is disposed around the transformer 2. Therefore, the pressure of the air blown towards the transformer 2 by the second air outlet pipe 14 is required to be larger, otherwise, the blown cooled air cannot contact with the transformer 2, and the purpose of cooling is achieved. Therefore, the present invention provides a second cooling device, which makes the air be ejected from the telescopic elbow 151 faster and contact with the sidewall of the transformer 2 by a stepwise pressurization.
Further, referring to fig. 10, a first cooling device, a second cooling device and the exhaust pipe 22 are used in combination. The first air inlet pipe 4, the second air inlet pipe 13 and the exhaust pipe 22 are connected through a tee pipe joint, at least one branch air pipe 23 is arranged on each of the first air inlet pipe 4 and the second air inlet pipe 13, and an electronic valve is arranged on each branch air pipe 23. It should be noted that: when the fan in the first air inlet pipe 4 is started, the fan in the second air inlet pipe 13 is not started, and the fan in the exhaust pipe 22 is selectively started; the electronic valve is closed. The specific process is as follows: when the fan in the first air inlet pipe 4 is started, the fan in the second air inlet pipe 13 is not started, the fan pumps hot air in the transformer chamber 1 out through the second air inlet pipe 13 and the exhaust pipe 22 to enter the cooling box 3 for heat exchange, then the hot air enters the transformer chamber 1 through the cooling box 3 and the first air outlet branch pipe 6, so that air in an area above the middle of the transformer 2 flows, the cold air sinks, the hot air rises, and the hot air is pumped out through the fan in the first air inlet pipe 4 through the exhaust pipe 22 and the cooling cylinder 12 and then enters the cooling box 3 through the first air inlet pipe 4; and hot air in transformer room 1 can cool down the air when the blast pipe 22 passes through, and also can carry out a heat exchange when the heat exchange section of thick bamboo 16 in cooling cylinder 12, makes the air temperature who takes out in transformer room 1 reduce, and rethread first intake pipe 4 enters into in the cooler bin 3 and carries out further heat exchange, makes the circulation cooling that the air in transformer room 1 can last.
When the fan in the second air inlet pipe 13 is started, the fan in the first air inlet pipe 4 is not started, the fan pumps hot air in the transformer chamber 1 out through the first air inlet pipe 4 and the exhaust pipe 22 to enter the cooling cylinder 12 for heat exchange, then the hot air enters the transformer chamber 1 through the second air outlet pipe 14 and the third air outlet pipe 15 to cool the outside of the transformer 2, and the fan in the second air inlet pipe 13 pumps the air out through the cooling box 3 and the exhaust pipe 22 and then enters the cooling cylinder 12 through the second air inlet pipe 13; and when the hot air in the transformer room 1 passes through the cooling box 3, a heat exchange is also carried out, so that the air in the transformer room 1 can be continuously cooled circularly.
The branch air pipe 23 and the electronic valve are arranged so that the electronic valve is opened to increase the air intake amount when the air volume cannot reach the specified or required air supply amount when the blower in 4 or 13 is started.
In the invention, the fan speed regulating device and the electronic valve are all connected with the controller, and each component is controlled and regulated by the controller, and the fault condition of each component is monitored, and an alarm is given to remind a worker to maintain.
The invention mainly aims at the hot summer, the temperature of the outside air is high, and the temperature of the transformer chamber 1 and the transformer 2 cannot be well reduced, so that the air is blown into the transformer chamber 1 after being reduced in temperature. In winter, the cooling device of the invention can remove moisture in the air. Therefore, the disclosed apparatus has no seasonal limitation.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. A cooling system of a power transformer of an underground substation, comprising a transformer room (1) located underground and a transformer (2) arranged in the transformer room (1), characterized in that: a first cooling device is arranged outside the transformer chamber (1), the first cooling device comprises a cooling box (3) and a first air inlet pipe (4) which is arranged on the side wall of the cooling box (3) and extends out of the ground, a fan is arranged in the first air inlet pipe (4), a first air outlet pipe (5) is arranged on the other side wall of the cooling box (3) corresponding to the first air inlet pipe (4), and a plurality of first air outlet branch pipes (6) extending into the transformer chamber (1) are connected to the first air outlet pipe (5); a cooling area and a drying area are sequentially arranged in the cooling box (3) from the first air inlet pipe (4) to the first air outlet pipe (5), cooling plates (7) and drying plates (8) for cooling and drying air are respectively arranged in the cooling area and the drying area in an up-down staggered manner, and the heights of the cooling plates (7) and the drying plates (8) are smaller than that of the cooling box (3), so that the path of the air passing through the cooling area and the drying area is in a snake shape; the number of the first air outlet branch pipes (6) is two, one end extending into the transformer chamber (1) is provided with air hoods (11), and the two air hoods (11) are respectively positioned on two opposite sides of the diagonal of the transformer (2); a strip-shaped hole (25) is transversely formed in the bottom of the drying plate (8) close to the cooling box (3); be provided with on bar hole (25), towards the direction of first outlet duct (5) strip shaped plate (28) that cover bar hole (25) completely, be fixed with spring (26) on bar shaped plate (28) and drying board (8) corresponding face, the other end of spring (26) passes and stretches out drying board (8), and the one end that stretches out drying board (8) is fixed with baffle (27).
2. A cooling system of a power transformer of an underground substation according to claim 1, characterized in that: a plurality of partition plates (9) are vertically arranged in the cooling box (3) along the length direction of the cooling box, and two ends of each partition plate (9) are fixed on the cooling plate (7) and the drying plate (8) which are close to the first air inlet pipe (4) and the first air outlet pipe (5); and the partition plate (9) is provided with a strip-shaped groove (10) matched with the cooling plate (7) and the drying plate (8).
3. A cooling system of a power transformer of an underground substation according to claim 1, characterized in that: the air hood (11) is arranged at a position 3/4-4/5 away from the ground of the transformer room (1).
4. A cooling system of a power transformer of an underground substation according to claim 1, characterized in that: a second cooling device is arranged outside the transformer chamber (1) opposite to the first cooling device, the second cooling device comprises a cooling cylinder (12), a second air inlet pipe (13) extending out of the ground is arranged at the top of the cooling cylinder (12), a second air outlet pipe (14) laid on the outer bottom surface of the transformer chamber (1) is arranged at the bottom of the cooling cylinder, and a fan is also arranged in the second air inlet pipe (13); and a plurality of third air outlet pipes (15) extending into the transformer chamber (1) and surrounding the transformer (2) are arranged on the second air outlet pipe (14), and the outlets of the third air outlet pipes (15) face the transformer (2).
5. A cooling system of a power transformer of an underground substation according to claim 4, characterized in that: a heat exchange cylinder (16) is arranged in the cooling cylinder (12), a plurality of heat exchange channels (17) are vertically arranged on the heat exchange cylinder (16), a transverse plate (18) is arranged at the bottom of the heat exchange cylinder (16), a plurality of inverted-truncated-cone-shaped through holes (19) are arranged on the transverse plate (18), and the maximum diameter of each inverted-truncated-cone-shaped through hole (19) is larger than that of each heat exchange channel (17); the transverse plate (18) is made of activated carbon.
6. A cooling system of a power transformer of an underground substation according to claim 5, characterized in that: a cavity (20) is formed in the position, close to the lower portion of the middle of the heat exchange cylinder (16), between the adjacent inverted-truncated-cone-shaped through holes (19), activated carbon is filled in the cavity (20), and a plurality of micropores communicated with the cavity (20) are formed in the inner wall of the heat exchange channel (17).
7. A cooling system of a power transformer of an underground substation according to claim 4, characterized in that: the part that third outlet duct (15) stretched into transformer room (1) is flexible return bend (151), ground in transformer room (1), be located the elbow below of flexible return bend (151) is provided with recess (21) rather than the looks adaptation, makes flexible return bend (151) are arranged in after being compressed completely in recess (21).
8. A cooling system of a power transformer of an underground substation according to claim 4, characterized in that: an exhaust pipe (22) with an exhaust hood is arranged at the inner top of the transformer chamber (1), and the exhaust pipe (22) extends out of the ground; a fan is also arranged in the exhaust pipe (22).
9. The cooling system for a power transformer of an underground substation according to any one of claims 1 to 8, wherein: the first air inlet pipe (4), the second air inlet pipe (13) and the exhaust pipe (22) are connected through a three-way pipe joint, at least one branch air pipe (23) is arranged on each of the first air inlet pipe (4) and the second air inlet pipe (13), and an electronic valve is arranged on each branch air pipe (23); and fan speed adjusting devices are respectively connected to the fans in the first air inlet pipe (4), the second air inlet pipe (13) and the exhaust pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380118.7A CN111430110B (en) | 2020-05-08 | 2020-05-08 | Cooling system of power transformer of underground substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380118.7A CN111430110B (en) | 2020-05-08 | 2020-05-08 | Cooling system of power transformer of underground substation |
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| Publication Number | Publication Date |
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| CN111430110A CN111430110A (en) | 2020-07-17 |
| CN111430110B true CN111430110B (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010380118.7A Expired - Fee Related CN111430110B (en) | 2020-05-08 | 2020-05-08 | Cooling system of power transformer of underground substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117079934B (en) * | 2023-10-13 | 2023-12-29 | 内蒙古北科交大机器人有限公司 | Temperature control device and power distribution device of distribution transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205004128U (en) * | 2015-09-21 | 2016-01-27 | 柳泽政 | Transformer for information communication |
| CN207529767U (en) * | 2017-11-17 | 2018-06-22 | 湖北晶楚工贸有限公司 | For the air blast cooling device of threephase oil immersed transformer |
| CN109360715A (en) * | 2018-12-24 | 2019-02-19 | 江西亚珀电气有限公司 | A kind of radiator of transformer |
| CN209371051U (en) * | 2018-12-27 | 2019-09-10 | 江苏朗达照明器材有限公司 | A kind of avenue moisture proof High-Pole Lamp |
-
2020
- 2020-05-08 CN CN202010380118.7A patent/CN111430110B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205004128U (en) * | 2015-09-21 | 2016-01-27 | 柳泽政 | Transformer for information communication |
| CN207529767U (en) * | 2017-11-17 | 2018-06-22 | 湖北晶楚工贸有限公司 | For the air blast cooling device of threephase oil immersed transformer |
| CN109360715A (en) * | 2018-12-24 | 2019-02-19 | 江西亚珀电气有限公司 | A kind of radiator of transformer |
| CN209371051U (en) * | 2018-12-27 | 2019-09-10 | 江苏朗达照明器材有限公司 | A kind of avenue moisture proof High-Pole Lamp |
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| CN111430110A (en) | 2020-07-17 |
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Inventor after: Wang Bin Inventor after: Song Jie Inventor before: Wang Bin Inventor before: Song Jie |
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