CN110783065A - Air cooling assembly for transformer chamber - Google Patents

Abstract

The invention discloses an air-cooling assembly for a transformer chamber, comprising a fan and a bracket assembly for fixing the fan. The top of the cantilever of the bracket assembly is detachably fixed on the top of the transformer chamber; a plurality of guide pipes are adjacent to each other along the circumference of the cantilever. The distribution is in a circular tube structure; the tops of several guide tubes are welded and fixed by the ring plate I, and the bottom ends are welded and fixed by the ring plate II; The plate I is fixed on the side wall of the cantilever; the bottom end of the circular tube structure is connected to the top of the fixed box through the ring plate II; the axial ends of each guide tube are open, and the inside of the fixed box and the bottom of the guide tube are open. The open end is connected; the fixed box is used to install the fan. The air-cooling assembly provided by the invention is beneficial to change the temperature difference between the radiator of the transformer and the surrounding environment, so that the transformer oil circulates between the inside of the transformer and the radiating fins, and the heat in the transformer is dissipated to the outside through the radiating fins in time; and the structure is simple. , flexible operation.

Description

A transformer room air-cooled assembly

technical field

The invention relates to the technical field of transformers, in particular to an air-cooled component of a transformer room.

Background technique

In the power grid system, a substation refers to a place in the power system that converts voltage and current, receives and distributes electrical energy. The substation in the power plant is a step-up substation, and its function is to boost the power generated by the generator and feed it to the high-voltage grid. At present, more and more oil-immersed transformers in substations adopt natural air cooling design. When the transformers adopt this natural air cooling method, when the ambient temperature is high and the load is heavy, the radiator of the transformer is connected to the transformer room. The ambient temperature difference is small, the heat transfer efficiency is low, and the heat dissipation capacity of the heat exchanger is reduced. Therefore, the heat dissipation capacity of this natural air-cooled oil-immersed transformer is limited by the ambient temperature and the transformer load. Especially during the high temperature period, the heat dissipation capacity of the transformer is low, and the transformer is easily affected by the high temperature, which will easily lead to the reduction of the insulation performance, and even enter the high temperature alarm state, which requires a large amount of manpower and material resources for maintenance.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: when the ambient temperature is high and the load is heavy, the conventional oil-immersed transformer has poor heat dissipation capacity, which is easy to reduce the service life of the transformer. .

The present invention is achieved through the following technical solutions:

An air-cooling assembly for a transformer room includes a fan and a bracket assembly for fixing the fan, the bracket assembly includes a cantilever, a fixing box and a plurality of guide pipes, and the top of the cantilever is used to be detachably fixed on the top of the transformer chamber; The plurality of guide tubes are adjacent to each other along the cantilever circumferential direction and are distributed in a circular tube structure, and the axial direction of the circular tube structure, the axial direction of the guide tube, and the axial direction of the cantilever are in the same direction;

The tops of the several guide tubes are welded and fixed by the ring plate I, and the bottom ends are welded and fixed by the ring plate II; on the side wall; the bottom end of the circular tube structure is connected to the top of the fixed box through the ring plate II; the axial ends of each guide tube are open, and the interior of the fixed box is communicated with the bottom open end of the guide tube; fixed The box is used to install the fan.

This system is mainly used when the ambient temperature of the transformer is high, such as in summer, so the installation of the fan is random and flexible. It is necessary to provide a bracket with a simple structure, convenient disassembly and assembly, easy to carry and store for installing the fan, and the transformer The layout of each device inside the room has been fixed, the installation of the bracket should not change the internal layout of the transformer room, and the floor area should be minimized, so as not to hinder the normal operation of the maintenance staff. Therefore, the present invention provides a mounting bracket assembly for a fan, which adopts a suspended structure. The suspension mainly includes a cantilever, a plurality of guide pipes and a fixed box. The cantilever mainly plays the role of suspension and fixing, and is used to connect the top of the transformer room. And the guide pipe; on the one hand, the guide pipe is used to install the fixed box, and on the other hand, it is used to collect current and promote the circulation of air in the transformer room. A plurality of diversion tubes are arranged in a circular tube structure. The circular tube structure and each diversion tube can play the role of gas diversion. Under the action of the fan in the fixed box, a certain negative pressure state will be generated, which is beneficial to the The upper air will be promoted to flow down the guide tube into the fixed box, and finally be blown to the radiator by the fan.

Further, the inner wall of the ring plate I extends outward along the cantilever axis to form a connecting sleeve, and the connecting sleeve is provided with a through hole, which is screwed into the side wall of the cantilever and fixed by bolts passing through the through hole.

The guide tube is fixed on the cantilever through the ring plate I, and the ring plate I and the side wall of the cantilever are detachably connected by bolts, the structure is simple, and the disassembly and assembly operations are convenient.

Further, the side wall of the cantilever is provided with a plurality of threaded holes, the plurality of threaded holes are evenly distributed along the axial direction of the cantilever, and each threaded hole is used for selecting bolts.

By arranging a plurality of threaded holes on the side wall of the cantilever, it is convenient to adjust the installation height of the fan, that is, when the ring plate I is installed on the cantilever near the threaded hole at the top, the depth of the cantilever extending into the circular pipe structure increases, and the fixed box is upward Moving, the height of the fixed box from the ground increases; on the contrary, when the ring plate I is installed on the cantilever near the threaded hole at the bottom end, the depth of the cantilever extending into the circular tube structure decreases, the fixed box moves down, and the fixed box The height from the ground is reduced.

Further, the ring plate II is connected with the fixed box through a rotating joint; the rotating joint includes a rotating drum I and a rotating drum II, one end of the rotating drum I is fixed on the ring plate II, and the other end extends into the rotating drum II In one end of the rotating cylinder II, the other end of the rotating cylinder II is connected with the top of the fixed box; at the sleeve joint position of the rotating cylinder I and the rotating cylinder II, the outer wall of the rotating cylinder I and the inner wall of the rotating cylinder II are rotatably connected; the inner diameter of the rotating cylinder I is larger than the cylindrical structure. the outer diameter.

The fixed box and the ring plate II are connected by a rotating joint, which is convenient to adjust the direction of the fan. When the direction of the air outlet of the fan in the fixed box needs to be changed, it is only necessary to apply an external force to make the drum I and the drum II rotate relative to each other. II drives the fixed box and the fan to rotate.

Further, the rotating drum I and the rotating drum II are connected by threaded rotation; and the outer wall of the rotating drum I sequentially includes a threaded section and a flat surface section along the axial direction from top to bottom, and the outer wall of the flat surface section is provided with a rubber pad, so The rubber pads are overfit and pressed between the outer wall of the drum I and the inner wall of the drum II.

Connecting the rotating drum I and the rotating drum II through the thread is convenient for disassembly and assembly on the one hand, and on the other hand, it is convenient to rotate the rotating drum II, so as to drive the fixed box to rotate, and realize the adjustment of the direction of the air outlet of the fan. Finally, by setting the rubber pad, it plays the role of limit prompt.

Further, a limit ring I is arranged on the outer side wall of the bottom end of the rotating drum I along the circumferential direction, and on the axial section of the rotating drum I, the limiting ring I and the side wall of the rotating drum I are L-shaped; the rotating drum II There is a limit ring II on the inner side wall of the top of the rotating drum along the circumferential direction. On the axial section of the rotating drum II, the limiting ring II and the side wall of the rotating drum II are in an inverted L shape; the outer diameter of the limiting ring I is larger than that of the limiting ring II. Inner diameter; when the rotating drum II is sleeved outside the rotating drum I, the centrally symmetrical L-shaped structure and the inverted L-shaped structure are mutually clamped to restrict the rotating drum II from sliding downward along the axis of the rotating drum I.

The rotating drum I and the rotating drum II are mutually hooked and pulled through the limit rings provided on the respective side walls, and the rotating drum II is mutually clamped and hung on the rotating drum I through the limiting ring I and the limiting ring II to prevent the rotating drum II. Slide down along the I axis of the drum.

Further, the outer wall of the limiting ring I and the inner wall of the rotating drum II are in rolling contact with each other through balls; the inner wall of the limiting ring II and the inner wall of the rotating drum I are in rolling contact with each other through balls.

That is, a ring groove is arranged on the outer wall of the limit ring I and the inner wall of the drum II along the circumferential direction, and balls are arranged in the ring groove. Similarly, the inner wall of the limit ring II and the outer wall of the drum I are arranged in the axial direction. Ring groove, balls are arranged in the ring groove, and the whole drum I and the whole drum II are connected by rolling in the circumferential direction of the balls, which is beneficial to reduce the frictional resistance of the drum I and the drum II.

Further, the fixed box includes a gas collection chamber and an installation chamber, the gas collection chamber is located directly above the installation chamber; the side wall of the gas collection chamber is provided with a first air inlet; the top of the gas collection chamber is provided with a second air inlet. The air inlet, the air collecting chamber is connected with the circular pipe structure and all the guide pipes through the second air inlet; the bottom of the air collecting chamber is connected with the top of the installation chamber through a through hole; the bottom of the installation chamber is provided with an air outlet; the installation chamber is used for fixing A fan; the input end of the fan communicates with the through hole, and the output end communicates with the air outlet.

Start the fan in the installation box to generate negative pressure in the gas collection chamber, the air located near the same plane of the fixed box enters the gas collection chamber through the first air inlet on the side wall of the gas collection chamber, and the air located in the fixed box, i.e. above the transformer room, passes through The second air inlet enters the air collecting chamber through the cylindrical structure, that is, a plurality of guide pipes, and the multiple air flows into the installation chamber through the through holes in the connection between the air collecting chamber and the installation chamber, and enters the fan through the input end of the fan. It is blown out from the output end of the fan and blows down to the radiator of the transformer below.

Further, the outer shape and inner contour of the air collecting chamber are both circular, a first air inlet is provided on the side wall of the air collecting chamber, and the air inlet direction of the first air inlet is located on the inner circular contour of the air collecting chamber. at the tangent position.

By setting the first air inlet in the tangential direction of the gas collection chamber, the impact force of the air flowing horizontally into the gas collection chamber will generate a pushing force on the inner wall of the gas collection chamber, and then the wind direction will be changed, and the air flowing into the gas collection chamber will flow downward. The airflow enters the installation room together. Since the frictional resistance of the rotating force between the drum I and the drum II is very small, under the pushing force, the air collecting chamber will drive the installation chamber and the drum II to rotate, which further promotes the surrounding air circulation.

The present invention has the following advantages and beneficial effects:

1. The air-cooled assembly provided by the present invention is beneficial to change the temperature difference between the radiator of the transformer and the surrounding environment, so that the transformer oil circulates between the inside of the transformer and the radiator fins, and the heat in the transformer is dissipated to the outside through the radiator fins in time;

2. The present invention is mainly used in cases where the ambient temperature of the transformer is high, such as in summer, so the installation of the fan is random and flexible, and it is necessary to provide a bracket with a simple structure, convenient disassembly and assembly, and easy handling and storage for installing the fan. And the layout of all components inside the transformer room has been fixed, the installation of the bracket should not change the internal layout of the transformer room, and the floor area should be reduced as much as possible, so as not to hinder the normal operation of the maintenance staff. Therefore, the present invention provides a mounting bracket assembly for a fan, which adopts a suspended structure. The suspension mainly includes a cantilever, a plurality of guide pipes and a fixed box. The cantilever mainly plays the role of suspension and fixing, and is used to connect the top of the transformer room. And the guide pipe; on the one hand, the guide pipe is used to install the fixed box, and on the other hand, it is used to collect current and promote the circulation of air in the transformer room. A plurality of diversion tubes are arranged in a circular tube structure. The circular tube structure and each diversion tube can play the role of gas diversion. Under the action of the fan in the fixed box, a certain negative pressure state will be generated, which is beneficial to the The upper air will be promoted to flow down the guide tube into the fixed box, and finally be blown to the radiator by the fan.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the embodiments of the present invention, and constitute a part of the present application, and do not constitute limitations to the embodiments of the present invention. In the attached image:

1 is a schematic diagram of the axial cross-sectional structure of the stent assembly of the present invention;

FIG. 2 is a schematic diagram of the three-dimensional structure of the bracket assembly of the present invention;

FIG. 3 is a top-view structural schematic diagram of the connection between the cantilever and the guide tube of the present invention.

4 is a schematic diagram of the axial cross-sectional structure in the connected state of the rotating drum I and the rotating drum II of the present invention;

FIG. 5 is a schematic diagram of the axial cross-sectional structure of the fixing box of the present invention.

The symbols in the drawings and the corresponding parts names: 1- cantilever, 2-fixed box, 3-guide pipe, 4-ring plate I, 5-ring plate II, 7-fan, 8-connecting sleeve, 9- Rotary joint, 91-drum I, 92-drum II, 93-limiting ring I, 94-limiting ring II, 95-ball, 21-air collection chamber, 22-installation chamber, 23-first air inlet , 24-second air inlet, 25-through hole, 26-air outlet.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.

Example 1

This embodiment provides an air cooling assembly for a transformer room, including a fan 7 and a bracket assembly for fixing the fan 7 . As shown in FIGS. 2 and 3 , the bracket assembly includes a cantilever 1 , a fixing box 2 and a plurality of guide tubes 3 , the top of the cantilever 1 is used to be detachably fixed on the top of the transformer chamber, the cantilever 1 adopts a cylindrical structure, and the top of the cantilever 1 can be welded with a mounting plate perpendicular to the axis of the cantilever 1, and the mounting plate is bolted to the top of the transformer chamber; Each guide tube 3 is a circular tube, and the plurality of guide tubes 3 are adjacent to each other along the circumferential direction of the cantilever 1, so that the overall structure of the plurality of guide tubes 3 is a circular tube structure, and the axial direction of the circular tube structure, the guide tube The axial direction of 3 and the axial direction of cantilever 1 are in the same direction. The top ends of the plurality of guide tubes 1 are welded and fixed by the ring plate I4, and the bottom ends are welded and fixed by the ring plate II5; On the side wall of the cantilever 1; the bottom end of the circular tube structure is connected to the top of the fixed box 2 through the ring plate II5; the axial ends of each guide tube 3 are open, and the interior of the fixed box 2 is connected to the guide tube 3 The bottom open end is connected; the fixed box 2 is used to install the fan 7.

Example 2

A further improvement is made on the basis of Embodiment 1. The inner wall of the ring plate I4 extends outward along the cantilever 1 axially to form a connecting sleeve 8. The connecting sleeve 8 is provided with a through hole, and the bolt passes through the through hole and then nails fixed on the side wall of the cantilever 1. The side wall of the cantilever 1 is provided with a plurality of threaded holes, the plurality of threaded holes are evenly distributed along the axial direction of the cantilever 1, and each threaded hole is used for selecting bolts.

The ring plate II5 is connected with the fixed box 2 through the rotating joint 9; the rotating joint 9 includes a rotating drum I91 and a rotating drum II92, one end of the rotating drum I91 is fixed on the ring plate II5, and the other end extends into one end of the rotating drum II92. The other end of II92 is connected to the top of the fixed box 2; at the sleeve connection position of the drum I91 and the drum II92, the outer wall of the drum I91 and the inner wall of the drum II92 are rotatably connected; the inner diameter of the drum I91 is larger than the outer diameter of the cylindrical structure.

The rotating drum I91 and the rotating drum II92 are rotatably connected by threads, and the outer wall of the rotating drum I91 includes a thread section and a flat surface section in sequence from top to bottom along the axial direction. The fixed box 2 is a box structure with open ends at both ends, with one open end serving as an air inlet and the other side serving as an air outlet.

Example 3

On the basis of Embodiment 2, it is further improved, and the difference lies in the connection mode of the rotating drum I91 and the rotating drum II92 and the structure of the fixing box 2 are different. A limit ring I93 is arranged on the outer side wall of the bottom end of the rotating drum I91 along the circumferential direction. On the axial section of the rotating drum I91, the limiting ring I93 and the side wall of the rotating drum I91 are L-shaped; the inner side of the top end of the rotating drum II92 There is a limit ring II94 on the wall along the circumferential direction. On the axial section of the rotating drum II92, the limiting ring II94 and the side wall of the rotating drum II92 are in an inverted L shape; the outer diameter of the limiting ring I93 is larger than the inner diameter of the limiting ring II94; When the cylinder II92 is sleeved outside the rotating cylinder I91, the rotating cylinder II92 is restricted from sliding downward along the axial direction of the rotating cylinder I91 through the mutual clamping of the centrally symmetric L-shaped structure and the inverted L-shaped structure. The outer wall of the limiting ring I93 and the inner wall of the rotating drum II92 are in rolling contact through the balls 95 ;

The fixed box 2 includes a gas collection chamber 21 and an installation chamber 22. The gas collection chamber 21 is located directly above the installation chamber 22; the side wall of the gas collection chamber 21 is provided with a first air inlet 23; The top is provided with a second air inlet 24, and the air collecting chamber 21 is communicated with the circular pipe structure and all the guide pipes 3 through the second air inlet 24; the bottom of the air collecting chamber 21 is communicated with the top of the installation chamber 22 through the through hole 25; The bottom of the chamber 22 is provided with an air outlet 26 ; the installation chamber 22 is used for fixing the fan; the input end of the fan communicates with the through hole 25 , and the output end communicates with the air outlet 26 . The outer shape and inner contour of the air collecting chamber 21 are both circular, and a first air inlet 23 is arranged on the side wall of the air collecting chamber 21 , and the air inlet direction of the first air inlet 23 is located in the inner circular contour of the air collecting chamber 21 . at the tangent position.

The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. The transformer room air cooling assembly of claim 1, comprising a fan and a bracket assembly for fixing the fan, wherein the bracket assembly comprises a cantilever (1), a fixed box (2) and a plurality of guide pipes (3), and the top end of the cantilever (1) is detachably fixed on the top of the variable pressure chamber; the plurality of flow guide pipes (3) are mutually adjacently distributed along the circumferential direction of the cantilever (1) to form a circular pipe structure, and the axial direction of the circular pipe structure, the axial direction of the flow guide pipes (3) and the axial direction of the cantilever (1) are in the same direction;

the top ends of the plurality of guide pipes (1) are welded and fixed through a ring plate I (4), and the bottom ends of the plurality of guide pipes are welded and fixed through a ring plate II (5); the bottom end of the cantilever (1) penetrates through the annular plate I (4) and then extends into the circular tube structure, and the circular tube structure is fixed on the side wall of the cantilever (1) through the annular plate I (4); the bottom end of the circular tube structure is connected with the top of the fixed box (2) through a ring plate II (5); both axial ends of each flow guide pipe (3) are open, and the inside of the fixed box (2) is communicated with the bottom open end of the flow guide pipe (3); the fixed box (2) is internally used for installing a fan (7).

2. The transformer room air cooling assembly according to claim 1, wherein the inner wall of the annular plate I (4) extends outwards along the axial direction of the cantilever (1) to form a connecting sleeve (8), the connecting sleeve (8) is provided with a through hole, and a bolt penetrates through the through hole and then is nailed into the side wall of the cantilever (1) to be fixed.

3. The air-cooling assembly for the transformer room as claimed in claim 2, wherein the cantilever (1) is provided with a plurality of threaded holes on the side wall, the plurality of threaded holes are uniformly distributed along the axial direction of the cantilever (1), and each threaded hole is used for selecting a bolt.

4. A transformer room air-cooling assembly according to claim 1 or 3, characterized in that the ring plate II (5) is connected with the stationary box (2) by means of a rotary joint (9); the rotary joint (9) comprises a rotary drum I (91) and a rotary drum II (92), one end of the rotary drum I (91) is fixed on the annular plate II (5), the other end of the rotary drum I (91) extends into one end of the rotary drum II (92), and the other end of the rotary drum II (92) is connected with the top of the fixed box (2); the outer wall of the rotary drum I (91) is rotationally connected with the inner wall of the rotary drum II (92) at the sleeving part of the rotary drum I (91) and the rotary drum II (92); the inner diameter of the rotating cylinder I (91) is larger than the outer diameter of the round tube structure.

5. The transformer room air-cooling assembly of claim 4, wherein the rotary drum I (91) and the rotary drum II (92) are rotatably connected through threads; and the outer wall of the rotary drum I (91) sequentially comprises a thread section and a flat surface section from top to bottom along the axial direction, a rubber pad is arranged on the outer wall of the flat surface section, and the rubber pad is excessively matched and compressed between the outer wall of the rotary drum I (91) and the inner wall of the rotary drum II (92).

6. The transformer room air cooling assembly of claim 4, wherein a limiting ring I (93) is circumferentially arranged on the outer side wall of the bottom end of the rotary drum I (91), and the limiting ring I (93) and the side wall of the rotary drum I (91) are L-shaped in axial section of the rotary drum I (91); a limiting ring II (94) is arranged on the inner side wall of the top end of the rotary drum II (92) along the circumferential direction, and the limiting ring II (94) and the side wall of the rotary drum II (92) are inverted L-shaped on the axial section of the rotary drum II (92); the outer diameter of the limiting ring I (93) is larger than the inner diameter of the limiting ring II (94); when the rotary drum II (92) is sleeved outside the rotary drum I (91), the rotary drum II (92) is limited to slide downwards along the axial direction of the rotary drum I (91) by the mutual clamping of the L-shaped structure and the inverted L-shaped structure which are centrosymmetric.

7. The air-cooling assembly for transformer room of claim 6, wherein the outer wall of the limiting ring I (93) is in rolling contact with the inner side wall of the rotary drum II (92) through balls (95); the inner wall of the limiting ring II (94) is in rolling contact with the inner wall of the rotary drum I (91) through a ball (95).

8. The transformer room air cooling assembly of claim 7, wherein the fixed box (2) comprises a plenum chamber (21) and an installation chamber (22), the plenum chamber (21) is positioned right above the installation chamber (22); a first air inlet (23) is arranged on the side wall of the air collection chamber (21); the top of the gas collection chamber (21) is provided with a second air inlet (24), and the gas collection chamber (21) is communicated with the circular tube structure and all the flow guide tubes (3) through the second air inlet (24); the bottom of the gas collection chamber (21) is communicated with the top of the mounting chamber (22) through a through hole (25); an air outlet (26) is arranged at the bottom of the mounting chamber (22); the installation chamber (22) is used for fixing the fan; the input end of the fan is communicated with the through hole (25), and the output end of the fan is communicated with the air outlet (26).

9. The transformer room air cooling assembly of claim 8, wherein the collection chamber (21) is circular in shape and inner contour, a first air inlet (23) is provided on a side wall of the collection chamber (21), and an air inlet direction of the first air inlet (23) is located at a tangential position of the circular contour inside the collection chamber (21).

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