阅读说明：本技术 一种轨道交通牵引变压器散热装置 (Heat dissipation device for rail transit traction transformer ) 是由 何帆 于 2021-10-12 设计创作，主要内容包括：本发明涉及轨道交通配电系统技术领域,尤其涉及一种轨道交通牵引变压器散热装置,包括外壳和位于外壳内的变压器主体、散热装置、冷却机构和温控机构,散热装置包括设置于外壳外部的抽风机,外壳上设置将外壳内腔与抽风机连通的排风孔,外壳的底板内设置将外壳内腔与外壳外部空间连通的进气道,冷却机构包括制冷机,温控机构用于根据变压器主体的温度来控制制冷机产生的冷气流入外壳内腔的冷气的流量大小。本方案通过温控机构来切换风冷降温和冷气降温的方式对变压器主体进行散热降温,达到节能和高效降温的目的。(The invention relates to the technical field of rail transit power distribution systems, in particular to a rail transit traction transformer heat dissipation device which comprises a shell, a transformer main body, a heat dissipation device, a cooling mechanism and a temperature control mechanism, wherein the transformer main body, the heat dissipation device, the cooling mechanism and the temperature control mechanism are positioned in the shell, the heat dissipation device comprises an exhaust fan arranged outside the shell, an exhaust hole for communicating an inner cavity of the shell with the exhaust fan is formed in the shell, an air inlet channel for communicating the inner cavity of the shell with an outer space of the shell is formed in a bottom plate of the shell, the cooling mechanism comprises a refrigerating machine, and the temperature control mechanism is used for controlling the flow rate of cold air generated by the refrigerating machine and flowing into the inner cavity of the shell according to the temperature of the transformer main body. This scheme switches the mode of forced air cooling and air conditioning cooling through temperature-controlled mechanism and dispels the heat the cooling to the transformer main part, reaches the purpose of energy-conserving and high-efficient cooling.)

1. The utility model provides a rail transit traction transformer heat abstractor, includes the shell and is located transformer main body in the shell, the shell is confined box, its characterized in that: the device also comprises a heat dissipation mechanism, a cooling mechanism and a temperature control mechanism;

the heat dissipation mechanism comprises an exhaust fan arranged outside the shell, an exhaust hole for communicating the inner cavity of the shell with the exhaust fan is arranged on the top plate of the shell, an air inlet channel for communicating the inner cavity of the shell with the external space of the shell is arranged in the bottom plate of the shell, and the cooling mechanism comprises a refrigerator;

the temperature control mechanism comprises a first spring, a first air pipe, a second air pipe, a first air cylinder, a first heat conducting fin, a triangular inclined block and a flow control valve, wherein the first air cylinder is of a tubular structure with two closed ends and is fixedly connected to the upper surface of the shell, the triangular inclined block is slidably arranged on the upper surface of the shell, a piston is horizontally arranged in the first air cylinder and is in sliding connection with the first air cylinder, a first push rod is fixedly connected to the piston, the other end of the first push rod extends out of the first air cylinder along the axis of the first air cylinder and is connected with the large end of the triangular inclined block, one end of the first spring is fixedly connected with the piston, and the other end of the first spring is fixedly connected with one end, close to the triangular inclined block, of the first air cylinder;

one end of the first heat-conducting fin is positioned in a closed cavity formed by the piston and one end of the first cylinder, which is far away from the triangular inclined block, and the other end of the first heat-conducting fin extends into the shell to be contacted with the transformer main body;

the flow regulating valve comprises a valve body, a second spring and a second push rod, the valve body is a cylinder body which is vertically arranged and is provided with two closed ends, the valve body is fixedly connected with the shell through a support, a sliding column is connected in the valve body in a sliding manner, the second push rod is vertically arranged, the upper end of the second push rod is fixedly connected with the sliding column, the lower end of the second push rod extends out of the valve body and is in contact with the inclined surface of the triangular inclined block, the second push rod is in sealing sliding connection with the valve body, the upper end of the second spring is connected with the upper bottom of the valve body, the lower end of the second spring is connected with the upper end surface of the sliding column, one end of the first air pipe is communicated with the inner cavity at the bottom of the valve body, the other end of the first air pipe is communicated with the inner cavity of the shell, the side wall at the middle part of the valve body is provided with an air conditioning inlet which is communicated with the inner space and the outer space of the valve body, one end of the second air pipe is communicated with the air conditioning inlet on the side wall of the valve body, the other end of the second air pipe is communicated with a cold air outlet of the refrigerator.

2. The heat dissipation device of the rail transit traction transformer of claim 1, wherein: the temperature control mechanism further comprises a second air cylinder, a second heat conducting fin and a third air pipe, the second air cylinder is of a cylindrical structure with two closed ends and is fixedly connected to the outer surface of the shell, one end of the second heat conducting fin is located in the second air cylinder, and the other end of the second heat conducting fin extends into the shell and is in contact with the transformer main body;

the air exhaust device is characterized in that a slide way crossed with the air exhaust hole is horizontally arranged in a top plate of the shell, a slide plate is slidably connected in the slide way, a transverse air passage with one end communicated with the slide way is further horizontally arranged in the top plate of the shell, the other end of the transverse air passage is communicated with an inner cavity of the second air cylinder through the third air pipe, a first check valve only allowing air flow to the transverse air passage from the second air cylinder is arranged on the third air pipe, a second check valve only allowing air flow to the inner cavity of the second air cylinder from the outside of the second air cylinder is arranged on the second air cylinder, a third spring is arranged in the slide way, one end of the third spring is fixedly connected with the slide plate, the other end of the third spring is fixedly connected with one end, close to the transverse air passage, of the top plate of the shell is vertically arranged in the top plate of the shell, and a vertical through hole is formed in the top plate of the shell and is crossed with the transverse air passage;

a vertical through groove for penetrating the triangular inclined block is vertically formed in the triangular inclined block, the lower end of the second push rod penetrates through the vertical through groove and extends into the vertical through hole, the second push rod is connected with the vertical through hole in a sealing and sliding mode, and a cross rod in contact with the inclined surface of the triangular inclined block is horizontally arranged on the second push rod;

vertical setting will in the roof of shell the slide with the taper hole of the inner space intercommunication of shell, the shell internal level sets up the connecting plate, the vertical setting of one end of connecting plate with taper hole complex toper stopper, the post is inserted to the vertical setting of the other end of connecting plate, the upper end of inserting the post stretch into in the vertical through-hole with the lower extreme contact of second push rod, insert post and the sealed sliding connection of vertical through-hole, the vertical fourth spring that sets up on the connecting plate, the upper end of fourth spring with the lower fixed surface of the roof of shell is connected, the lower extreme of fourth spring with connecting plate fixed connection.

3. The heat dissipation device of the rail transit traction transformer as recited in claim 2, wherein: the cross rod transversely penetrates through the second push rod and is fixedly connected with the second push rod, the two ends of the cross rod are rotatably connected with the idler wheels, and the idler wheels are in rolling connection with the inclined surfaces of the right-angle triangular inclined blocks.

4. The heat dissipation device of the rail transit traction transformer of claim 3, wherein: the triangle sloping block is right angle triangle sloping block, a right angle face of right angle triangle sloping block with the upper surface contact of shell, another right angle face of right angle triangle sloping block is close to first inflator, the inclined plane of right angle triangle sloping block is followed the axis of inflator is to keeping away from the direction downward sloping of first inflator.

5. The heat dissipation device of the rail transit traction transformer as recited in claim 4, wherein: the transformer body is wrapped with heat collecting sheets, and one ends of the first heat conducting sheet and the second heat conducting sheet, which are positioned in the shell, are in contact with the heat collecting sheets.

6. The heat dissipation device of the rail transit traction transformer of claim 5, wherein: the intake duct is including the main entrance that admits air and inciting somebody to action a plurality of branch ways of admitting air of main entrance and shell inner chamber intercommunication, it is a plurality of branch way equipartition of admitting air is in around the transformer main part, the gas outlet of the branch way of admitting air is directional the transformer main part.

7. The heat dissipation device of the rail transit traction transformer as recited in claim 6, wherein: and the second air cylinder is provided with a safety valve for releasing pressure of the inner cavity of the second air cylinder.

8. The heat dissipation device of the rail transit traction transformer as recited in claim 7, wherein: the end, extending out of the first air cylinder, of the first push rod is provided with an external thread, the end face of the right-angle triangular inclined block, close to the first air cylinder, is correspondingly provided with an internal thread matched with the external thread on the first push rod, and the right-angle triangular inclined block is in threaded connection with the first push rod.

9. The heat dissipation device of the rail transit traction transformer of claim 8, wherein: the first heat conducting sheet positioned outside the first air cylinder and the second heat conducting sheet positioned outside the second air cylinder are both coated with heat insulating layers, and the outer surface of the first air cylinder and the outer surface of the second air cylinder are both coated with heat insulating layers.

10. The heat dissipation device of the rail transit traction transformer of claim 9, wherein: the heat collecting sheet, the first heat conducting sheet and the second heat conducting sheet are all made of copper sheets.

Technical Field

The invention relates to the technical field of rail transit distribution equipment, in particular to a heat dissipation device for a rail transit traction transformer.

Background

In modern society, rail transit is increasingly becoming the most closely related means of transportation to people's life, with the rapid development of rail transit technology in our country, the rail transit line in China basically realizes comprehensive electrification, traction transformer is the core of high-speed rail bow net system electric energy transmission, mainly used for getting 25KV high-voltage transform supply traction motor and other motor, electrical apparatus suitable voltage of working, therefore traction transformer is the core of rail transit vehicle, key part, because the current change in the rail train operation process is great, lead to the fact a large amount of heats in traction transformer work, if do not dispel the heat and cool down to traction transformer in time, may cause the damage of traction transformer, even cause the rail train fire in serious cases. The mode that dispels the heat and cool down to traction transformer now usually adopts forced air cooling alone or adopts air conditioning cooling alone, and the effect of adopting forced air cooling alone is unsatisfactory, when adopting air conditioning cooling alone, and refrigeration plant is still continuing power consumptive refrigeration when transformer temperature falls to enough low, is unfavorable for energy-concerving and environment-protective and adjusts cooling temperature in good time according to transformer temperature.

Disclosure of Invention

The invention aims to provide a heat dissipation device with a good cooling function for a rail transit traction transformer, so as to prevent dangerous situations such as vehicle fire caused by overhigh temperature of the traction transformer.

In order to achieve the above purpose, the basic scheme of the invention is as follows:

a heat dissipation device for a rail transit traction transformer comprises a shell, a heat dissipation mechanism, a cooling mechanism, a temperature control mechanism and a transformer main body positioned in the shell, wherein the shell is a closed box body;

the heat dissipation mechanism comprises an exhaust fan arranged outside the shell, an exhaust hole for communicating the inner cavity of the shell with the exhaust fan is arranged on the top plate of the shell, an air inlet channel for communicating the inner cavity of the shell with the external space of the shell is arranged in the bottom plate of the shell, and the cooling mechanism comprises a refrigerator;

the temperature control mechanism comprises a first spring, a first air pipe, a second air pipe, a first air cylinder, a first heat conducting fin, a triangular inclined block and a flow control valve, wherein the first air cylinder is of a tubular structure with two closed ends and is fixedly connected to the upper surface of the shell, the triangular inclined block is slidably arranged on the upper surface of the shell, a piston is horizontally arranged in the first air cylinder and is in sliding connection with the first air cylinder, a first push rod with one end connected with the piston and the other end extending out of the first air cylinder along the axis of the first air cylinder and connected with the large end of the triangular inclined block is arranged on the piston, one end of the first spring is fixedly connected with the piston, and the other end of the first spring is fixedly connected with one end, close to the triangular inclined block, of the first air cylinder;

one end of the first heat-conducting fin is positioned in a closed cavity formed by the piston and one end of the first cylinder, which is far away from the triangular inclined block, and the other end of the first heat-conducting fin extends into the shell to be contacted with the transformer main body;

the flow regulating valve comprises a valve body, a second spring and a second push rod, the valve body is a cylinder body which is vertically arranged and is provided with two closed ends, the valve body is fixedly connected with the shell through a support, a sliding column is connected in the valve body in a sliding manner, the second push rod is vertically arranged, the upper end of the second push rod is fixedly connected with the sliding column, the lower end of the second push rod extends out of the valve body and is in contact with the inclined surface of the triangular inclined block, the second push rod is in sealing sliding connection with the valve body, the upper end of the second spring is connected with the upper bottom of the valve body, the lower end of the second spring is connected with the upper end surface of the sliding column, one end of the first air pipe is communicated with the inner cavity at the bottom of the valve body, the other end of the first air pipe is communicated with the inner cavity of the shell, the side wall at the middle part of the valve body is provided with an air conditioning inlet which is communicated with the inner space and the outer space of the valve body, one end of the second air pipe is communicated with the air conditioning inlet on the side wall of the valve body, the other end of the second air pipe is communicated with a cold air outlet of the refrigerator.

The principle and the beneficial effects of the basic scheme of the invention are as follows:

the air extractor operates to extract air from the inner cavity of the shell to cool and dissipate heat of the transformer body, when the air extractor extracts air, the air outside the shell enters the shell from the air inlet channel, when the temperature of the transformer body is not high, the temperature of the heat conducting fins in the first air cylinder is not high, the air pressure in the closed cavity is not enough to overcome the elasticity of the first spring to push the piston to move and enable the second push rod to drive the sliding column to move upwards, the sliding column seals the air inlet, and air cannot enter the inner cavity of the valve body below the sliding column through the second air pipe and enters the inner cavity of the shell through the first air pipe.

When the temperature of the transformer main body cannot be reduced due to increased heating and air cooling of the transformer main body, the temperature of the transformer main body rises, the temperature of a first heat conducting sheet in a first air cylinder rises synchronously, so that the temperature of gas in a closed cavity of the first air cylinder rises, the air pressure in the closed cavity rises, the increased air pressure in the closed cavity pushes a piston to overcome the elasticity of a first spring to push a first push rod to move towards the direction close to a triangular inclined block, a second push rod overcomes the elasticity of a second spring to drive a sliding column to move upwards under the inclined surface action of the triangular inclined block, the sliding column moves upwards so that the sliding column and an air cooling inlet are staggered by a certain area, so that a second air pipe is communicated with a valve body inner cavity below the sliding column, and at the same time, air enters a valve body inner cavity below the sliding column through the second air pipe and enters a housing inner cavity through the first air pipe to cool the transformer main body.

When the temperature of the transformer main body is higher, the air pressure of the closed cavity is also higher, and the moving distance of the triangular inclined block is larger, so that the upward moving distance of the second push rod is larger, the staggered area of the sliding column and the cold air inlet is larger, the cold air flow entering the inner cavity of the shell from the second air pipe in unit time is larger, and the cooling effect on the transformer main body is also stronger.

When the temperature of the transformer main body is reduced to a certain range through cooling by the cold air, the temperature of the first heat conducting sheet is reduced along with the reduction of the air pressure in the closed cavity, the piston moves towards the direction away from the triangular inclined block under the elastic force of the first spring, the second push rod and the sliding column move downwards to enable the sliding column to block the cold air inlet, the cold air cannot enter the inner cavity of the shell, and the transformer main body continues to perform air cooling heat dissipation and cooling simply.

Compared with the prior art, this basic scheme's beneficial effect lies in:

1. this basic scheme switches the mode of forced air cooling and air conditioning cooling through temperature control mechanism and dispels the heat the cooling to the transformer main part, carry out the forced air cooling when transformer main part calorific capacity is not big, carry out the air conditioning cooling when transformer main part calorific capacity is great, because the electric energy of air exhauster consumption is far less than the electric energy that refrigerator consumed when refrigerating when the forced air cooling cools down, compare with the pure forced air cooling mode that adopts, this basic scheme has improved cooling efficiency, compare with the pure air conditioning cooling that adopts, the energy has been practiced thrift to the forced air cooling of this basic scheme and the cooling mode that the air conditioning combines.

2. This basic scheme can adjust the size that gets into the cold air flow of shell inner chamber according to the height of transformer main part temperature, and the refrigeration energy consumption is further practiced thrift to the rational utilization air conditioning resource.

The temperature control mechanism further comprises a second air cylinder, a second heat conducting strip and a third air pipe, wherein the second air cylinder is of a cylindrical structure with two closed ends and is fixedly connected to the outer surface of the shell, one end of the second heat conducting strip is located in the second air cylinder, and the other end of the second heat conducting strip extends into the shell and is in contact with the transformer main body;

the air exhaust device is characterized in that a slide way crossed with the air exhaust hole is horizontally arranged in a top plate of the shell, a slide plate is slidably connected in the slide way, a transverse air passage with one end communicated with the slide way is further horizontally arranged in the top plate of the shell, the other end of the transverse air passage is communicated with an inner cavity of the second air cylinder through the third air pipe, a first check valve only allowing air flow to the transverse air passage from the second air cylinder is arranged on the third air pipe, a second check valve only allowing air flow to the inner cavity of the second air cylinder from the outside of the second air cylinder is arranged on the second air cylinder, a third spring is arranged in the slide way, one end of the third spring is fixedly connected with the slide plate, the other end of the third spring is fixedly connected with one end, close to the transverse air passage, of the top plate of the shell is vertically arranged in the top plate of the shell, and a vertical through hole is formed in the top plate of the shell and is crossed with the transverse air passage;

a vertical through groove for penetrating the triangular inclined block is vertically formed in the triangular inclined block, the lower end of the second push rod penetrates through the vertical through groove and extends into the vertical through hole, the second push rod is connected with the vertical through hole in a sealing and sliding mode, and a cross rod in contact with the inclined surface of the triangular inclined block is horizontally arranged on the second push rod;

vertical setting will in the roof of shell the slide with the taper hole of the inner space intercommunication of shell, the shell internal level sets up the connecting plate, the vertical setting of one end of connecting plate with taper hole complex toper stopper, the post is inserted to the vertical setting of the other end of connecting plate, the upper end of inserting the post stretch into in the vertical through-hole with the lower extreme contact of second push rod, insert post and the sealed sliding connection of vertical through-hole, the vertical fourth spring that sets up on the connecting plate, the upper end of fourth spring with the lower fixed surface of the roof of shell is connected, the lower extreme of fourth spring with connecting plate fixed connection.

When the temperature of the transformer main body is not high, the air pressure increase amplitude in the closed cavity in the first air cylinder is not large, the sliding distance of the piston towards the direction close to the triangular inclined block is small due to the blocking of the elastic force of the first spring, at the moment, the lower end of the second push rod is still located in the vertical through hole below the transverse air passage, so that the second push rod blocks and separates the transverse air passage, the inner cavity of the second air cylinder is separated from the slide way, air in the inner cavity of the second air cylinder cannot enter the slide way, and at the moment, the inserting column overcomes the elastic force of the fourth spring under the extrusion of the lower end of the second push rod to drive the connecting plate and the conical plug to move downwards, so that a gap is formed between the conical plug and the conical hole.

When the temperature of the transformer main body rises, the temperature rise air pressure of the closed cavity in the first air cylinder and the temperature rise air pressure of the inner cavity of the second air cylinder increase, the air pressure of the closed cavity in the first air cylinder forces the piston to overcome the elastic force of the first spring to push the triangular sloping block to move so that the second push rod drives the sliding column to move upwards, and when the second push rod moves upwards, the inserted column drives the connecting plate and the conical plug to move upwards under the elastic force of the fourth spring so that the conical plug is attached to the conical hole to plug the conical hole.

When the sliding column moves upwards along with the rise of the temperature and staggers with the cold air inlet to enable the cold air of the second air pipe to enter the inner cavity of the shell, the lower end of the second push rod moves upwards to enable the transverse air passage to be conducted, high-pressure air in the first air cylinder enters the slide way through the transverse air passage to enable the slide block to move towards the direction far away from the transverse air passage to block the air exhaust hole, so that the cold air which just enters the inner cavity of the shell is prevented from being pumped out of the inner cavity of the shell by the exhaust fan, heat exchange is fully performed between the cold air and the transformer main body to enable the transformer main body to be cooled, the cold air after heat exchange is discharged out of the shell through the air inlet passage, the first check valve prevents the air in the transverse air passage from flowing into the second air cylinder, and the sliding plate is favorable for continuously keeping the blocking of the air exhaust hole.

After the temperature of the transformer main body is reduced, the air pressure of a closed cavity in the first air cylinder and the air pressure of an inner cavity of the second air cylinder are reduced, the triangular inclined block moves towards the direction close to the first air cylinder under the elastic force of the first spring, so that the second push rod moves downwards under the elastic force of the second spring to separate the transverse air passage again, the lower end of the second push rod downwards extrudes the inserting column to enable the inserting column to move downwards to further enable the conical plug and the conical hole to generate a gap, the air in the slide flows out to the outside of the slide through the gap to reduce the air pressure in the slide, the air exhaust hole is communicated when the slide moves towards the direction close to the transverse air passage under the elastic force of the third spring, and the exhaust fan continuously performs air cooling heat dissipation on the transformer main body.

When the air pressure in the inner cavity of the second air cylinder is reduced, the second one-way valve is opened to enable the air in the outer space of the second air cylinder to enter the second air cylinder.

This optimization scheme has closed the hole of airing exhaust when letting in air conditioning to the shell inner chamber to prevent that the air conditioning that just lets in the shell inner chamber is taken out by the air exhauster and is left the shell outside, plays to prolong the dwell time of air conditioning in the shell and makes air conditioning and transformer main part carry out abundant heat exchange, improves air conditioning utilization ratio and cooling efficiency.

Furthermore, in order to reduce the friction force between the inclined plane of the triangular inclined block and the cross rod, the cross rod transversely penetrates through the second push rod and is fixedly connected with the second push rod, the two ends of the cross rod are rotatably connected with the rollers, and the rollers are connected with the inclined plane of the right-angle triangular inclined block in a rolling manner.

Further, the triangle sloping block is right angle triangle sloping block, a right angle face of right angle triangle sloping block with the upper surface contact of shell, another right angle face of right angle triangle sloping block is close to first inflator, the inclined plane of right angle triangle sloping block is followed the axis of inflator is to keeping away from the direction downward sloping of inflator.

Further, in order to feed back the temperature of each part of the transformer main body in time, the transformer main body is wrapped with a heat collecting sheet, and one ends of the first heat conducting sheet and the second heat conducting sheet, which are positioned in the shell, are both in contact with the heat collecting sheet.

Further, the intake duct is including the main entrance that admits air and a plurality of branch ways of admitting air that will admit air main entrance and shell inner chamber intercommunication, and is a plurality of branch way equipartition of admitting air is in around the transformer main body, the gas outlet of the branch way of admitting air is directional transformer main body, during air exhauster extraction, the outside air of shell disperses to each branch way of admitting air and dispels the heat to transformer main body all-round blowing through the main entrance of admitting air, improves air-cooled cooling effect.

Further, in order to prevent the second air cylinder from bursting due to the fact that air pressure of the inner cavity of the second air cylinder continues to rise when the air exhaust hole is blocked by the sliding plate, a safety valve used for releasing pressure of the inner cavity of the second air cylinder is arranged on the second air cylinder.

Further, the one end that first push rod stretches out outside the first cylinder sets up the external screw thread, and the right angle triangle sloping block is close to the terminal surface of first cylinder corresponds the internal thread that sets up with external screw thread fit on the first push rod, the right angle triangle sloping block with first push rod threaded connection can adjust through the length of closing soon of adjusting right angle triangle sloping block and first push rod the second push rod stretches out the outer length of valve body, further reaches the temperature of adjustment air conditioning transformer main part when letting in the shell inner chamber.

Further, in order to truly reflect the temperature of the transformer main body, the temperature of the transformer main body is close to the temperature of the first heat conducting strip in the first air cylinder and the temperature of the second heat conducting strip in the second air cylinder, the first heat conducting strip outside the first air cylinder and the second heat conducting strip outside the second air cylinder are both coated with heat insulating layers, and the outer surface of the first air cylinder and the outer surface of the second air cylinder are both coated with heat insulating layers.

Drawings

Fig. 1 is a schematic structural view in the front view direction of the embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a front view showing the second push rod and the right-angled triangular oblique block.

FIG. 4 is a top view of the second shaft and the right angle cam block.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the air-conditioning system comprises a shell 10, a transformer main body 20, a heat collecting sheet 201, an exhaust fan 30, an exhaust hole 301, an air inlet main channel 302, an air inlet branch channel 303, a refrigerator 40, a first air pipe 401, a second air pipe 402, a first air cylinder 50, a first heat conducting sheet 501, a piston 502, a first push rod 503, a first spring 504, a right-angled triangular oblique block 505, a closed cavity 506, a vertical through groove 507, a second air cylinder 60, a second heat conducting sheet 601, a third air pipe 602, a first check valve 603, a second check valve 604, a safety valve 605, a valve body 70, a sliding column 701, a second push rod 702, a second spring 703, an air release hole 704, a cross rod 705, a roller 706, a cold air inlet 707, a sliding channel 801, a sliding plate 802, a third spring 803, a transverse air channel 804, a taper hole 805, a taper plug 806, a connecting plate 807, an insert column 808, a fourth spring 809 and a bracket 90.

In an embodiment, as shown in fig. 1, a heat dissipation device for a rail transit traction transformer includes a housing 10, a heat dissipation mechanism, a cooling mechanism, a temperature control mechanism, and a transformer main body 20 located in the housing 10, where the housing 10 is a closed box, the transformer main body 20 is fixedly disposed on a bottom plate of the housing 10, and the transformer main body 20 is wrapped with a heat collection sheet 201 made of a copper sheet.

As shown in fig. 1, the heat dissipation mechanism includes an exhaust fan 30 disposed outside the housing 10, the exhaust fan 30 is externally connected to a power supply, an exhaust hole 301 for communicating an inner cavity of the housing 10 with the exhaust fan 30 is disposed on a top plate of the housing 10, an air intake main channel 302 having one end communicated with an outer space of the housing 10 is disposed in a bottom plate of the housing 10, a plurality of air intake branch channels 303 for communicating the air intake main channel 302 with the inner cavity of the housing 10 are disposed in the bottom plate of the housing 10, the plurality of air intake branch channels 303 are uniformly distributed around the transformer body 20, air outlets of the air intake branch channels 303 point to the transformer body 20, the cooling mechanism includes a refrigerator 40, and the refrigerator 40 is externally connected to the power supply;

with reference to fig. 1 to 4, the temperature control mechanism includes a first spring 504, a first air tube 401, a second air tube 402, a first air cylinder 50, a first heat conducting fin 501, a right-angled triangular sloping block 505, a second air cylinder 60, a second heat conducting fin 601, a third air tube 602 and a flow control valve, the first air cylinder 50 is a tubular structure with two closed ends, the first air cylinder 50 is horizontally arranged on the upper surface of the housing 10 and is fixedly connected with the housing 10, the right-angled triangular sloping block 505 is arranged on the upper surface of the housing 10, a right-angled surface of the right-angled triangular sloping block 505 is in contact with the upper surface of the housing 10, another right-angled surface of the right-angled triangular sloping block 505 is close to the first air cylinder 50, an inclined surface of the right-angled triangular sloping block 505 inclines downwards along an axis of the air cylinder in a direction away from the first air cylinder 50, and a vertical through groove 507 is vertically arranged on the right-angled triangular sloping block 505.

A piston 502 is connected in a first air cylinder 50 in a sliding mode, a closed cavity 506 is formed by the piston 502 and one end, far away from a right-angle triangular inclined block 505, of the first air cylinder 50, a first push rod 503 is arranged on the piston 502, one end of the first push rod 503 is fixedly connected with the piston 502, the other end of the first push rod 503 extends out of the first air cylinder 50 along the axis of the first air cylinder 50, one end, extending out of the first air cylinder 50, of the first push rod 503 is provided with an external thread, an internal thread matched with the external thread on the first push rod 503 is correspondingly arranged on the end face, close to the first air cylinder 50, of the right-angle triangular inclined block 505, and the first push rod 503 is in threaded connection.

The first spring 504 is sleeved outside the first push rod 503 positioned in the first air cylinder 50 and can freely extend and retract, one end of the first spring 504 is fixedly connected with the piston 502, and the other end of the first spring 504 is fixedly connected with one end, close to the right-angled triangular inclined block 505, of the first air cylinder 50;

the first heat conducting sheet 501 is made of a copper sheet, one end of the first heat conducting sheet 501 is located in the closed cavity 506, and the other end of the first heat conducting sheet 501 extends into the shell 10 to contact with the heat collecting sheet 201;

the second cylinder 60 is in a cylindrical structure with two closed ends and is fixedly connected to the outer surface of the housing 10, the second heat conducting strip 601 is made of a copper sheet, one end of the second heat conducting strip 601 is located in the second cylinder 60, and the other end of the second heat conducting strip 601 extends into the housing 10 and contacts with the heat collecting strip 201.

As shown in fig. 2, the flow regulating valve includes a valve body 70, a second spring 703 and a second push rod 702, the valve body 70 is a vertically arranged cylinder with two closed ends, the valve body 70 is fixedly connected with the housing 10 through a bracket 90, the bottom of the upper end of the valve body 70 is provided with an air release hole 704 for communicating the inner space and the outer space of the valve body 70, the valve body 70 is slidably connected with a sliding column 701, the upper end of the second spring 703 is connected with the upper bottom of the valve body 70, and the lower end of the second spring 703 is connected with the upper end face of the sliding column 701.

Referring to fig. 1 and 2, one end of the first air tube 401 is communicated with the bottom inner cavity of the valve body 70, the other end of the first air tube 401 is communicated with the inner cavity of the housing 10, a cold air inlet 707 for communicating the inner space and the outer space of the valve body 70 is disposed on the middle side wall of the valve body 70, when the transformer body 20 is in a normal working temperature state and does not require cold air to be introduced for cooling, the sliding column 701 is located at a position capable of blocking the cold air inlet 707 on the side wall of the valve body 70, one end of the second air tube 402 is communicated with the cold air inlet 707, and the other end of the second air tube 402 is communicated with the cold air outlet of the refrigerator 40.

A slide way 801 crossed with the air exhaust hole 301 is horizontally arranged in the top plate of the shell 10, a sliding plate 802 is connected in the slide way 801 in a sliding way, a transverse air channel 804 is horizontally arranged in the top plate of the shell 10, one end of the transverse air channel 804 is communicated with the slide way 801, the other end of the transverse air channel 804 is communicated with the inner cavity of the second air cylinder 60 through a third air pipe 602, a first one-way valve 603 which only allows air flow to flow from the second air cylinder 60 to the transverse air channel 804 is arranged on the third air pipe 602, a second one-way valve 604 which only allows air flow to flow from the outside of the second air cylinder 60 to the inner cavity of the second air cylinder 60 is arranged on the second air cylinder 60, a safety valve 605 for releasing pressure of the inner cavity of the second air cylinder 60 is further arranged on the second air cylinder 60, a third spring 803 is arranged in the slide channel 801, one end of the third spring 803 is fixedly connected with the sliding plate 802, the other end of the third spring 803 is fixedly connected with one end of the slide channel 801 close to the transverse air channel 804, and a vertical through hole which penetrates through the top plate of the outer shell 10 and is crossed with the transverse air channel 804 is vertically arranged in the top plate of the outer shell 10.

The second push rod 702 is vertically arranged, the upper end of the second push rod 702 is fixedly connected with the sliding column 701, the lower end of the second push rod 702 penetrates through the vertical through groove 507 and extends into the vertical through hole, the second push rod 702 is in sealing sliding connection with the valve body 70 and the vertical through hole, a cross rod 705 in contact with the inclined surface of the triangular inclined block is horizontally arranged on the second push rod 702, the cross rod 705 transversely penetrates through the second push rod 702 and is fixedly connected with the second push rod 702, two ends of the cross rod 705 are rotatably connected with the roller 706, and the roller 706 is in rolling connection with the inclined surface of the right-angled triangular inclined block 505.

The taper hole 805 of the interior space intercommunication of vertical setting with slide 801 and shell 10 in the roof of shell 10, the level sets up connecting plate 807 in the shell 10, the vertical setting of one end of connecting plate 807 and taper hole 805 complex toper stopper 806, post 808 is inserted in the vertical setting of the other end of connecting plate 807, the upper end of inserting post 808 stretches into in the vertical through-hole and the lower extreme contact of second push rod 702, insert post 808 and the sealed sliding connection of vertical through-hole, fourth spring 809 cover can freely stretch out and draw back outside inserting post 808, the upper end of fourth spring 809 and the lower fixed surface of the roof of shell 10 are connected, the lower extreme and the connecting plate 807 fixed connection of fourth spring 809.

The first heat conducting sheet 501 positioned outside the first air cylinder 50 and the second heat conducting sheet 601 positioned outside the second air cylinder 60 are both coated with heat insulating layers, and the outer surface of the first air cylinder 50 and the outer surface of the second air cylinder 60 are both coated with heat insulating layers.

The rail transit traction transformer heat dissipation device of the embodiment has the beneficial effects that:

compare with the simple forced air cooling that adopts of current conventionality or the cooling air cooling that adopts simply, this scheme has following beneficial effect at least:

1. this basic scheme switches the mode of forced air cooling and air conditioning cooling through temperature control mechanism and dispels the heat the cooling to the transformer main part, carry out the forced air cooling when transformer main part calorific capacity is not big, carry out the air conditioning cooling when transformer main part calorific capacity is great, because the electric energy of air exhauster consumption is far less than the electric energy that refrigerator consumed when refrigerating when the forced air cooling cools down, compare with the pure forced air cooling mode that adopts, this basic scheme has improved cooling efficiency, compare with the pure air conditioning cooling that adopts, the energy has been practiced thrift to the forced air cooling of this basic scheme and the cooling mode that the air conditioning combines.

2. This basic scheme can adjust the size that gets into the cold air flow of shell inner chamber according to the height of transformer main part temperature, and the refrigeration energy consumption is further practiced thrift to the rational utilization air conditioning resource.

3. This basic scheme is through setting up a series of structural feature such as second inflator, has played and has closed the hole of airing exhaust when letting in air conditioning to the shell inner chamber, prevents that the air conditioning that just lets in the shell inner chamber is taken out by the air exhauster and is left the shell outside, has prolonged the dwell time of air conditioning in the shell and has made air conditioning and transformer main part fully carry out the heat exchange, improves cooling efficiency.

4. This embodiment has set up out the gas ring and has admitted air the branch way, has further improved the cooling effect to the transformer main part.

5. The embodiment can determine the value of the temperature of the transformer body increased by changing the screwing length of the right-angle triangular inclined block and the first push rod, and then switch to the cold air cooling mode.

The above are merely examples of the present invention, and common general knowledge of known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.