Air cooling device for improving load capacity of dry-type transformer and working method thereof

Abstract

The application relates to a wind cooling device for improving the load capacity of a dry-type transformer and a working method thereof, characterized by comprising a base for supporting the winding of the dry-type transformer, wherein the base is fixedly connected by left and right horizontally-extending mounting seats and front and rear longitudinally-extending support beams, the support beams are arranged in parallel above the mounting seats, the outer ends of the two support beams are fixedly connected with bent support plates, the bent support plates are V-shaped, the V-shaped openings of the bent support plates are outward, the upper sections of the bent support plates are fixedly connected with the support beams, the upper surfaces of the lower sections of the bent support plates are fixedly provided with fans, the air outlets of the fans are inward, the wind cooling device for improving the load capacity of the dry-type transformer has the advantages of simple structure, adjustable blowing angle, effectively balanced wind cooling and heat dissipation capacity of high and low voltage windings, reduced temperature rise of the high and low windings, effectively improved load capacity of the transformer, prolonged service life, and obvious improvement on the reliability of the transformer.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of wind cooling device of improving dry-type transformer load capacity and its working method. BACKGROUND

[0002] With the progress of society, the improvement of electrification, the capacity of distribution equipment is often not enough or transformer coil overheating problem. The winding temperature of transformer has direct relationship with service life, the lower the winding temperature is during operation, the longer the service life of transformer is. If the maximum effect of existing transformer is exerted, the load capacity of transformer is improved, and the high-quality, safe and stable operation of transformer is the responsibility of electric power equipment product that cannot be delayed. According to the national standard GB1094.11, the winding temperature rise of dry-type transformer in self-cooling state should be lower than the national standard value, wherein the winding temperature rise of F class heat-resistant insulation is lower than 100K, and the winding temperature rise of H class heat-resistant insulation is lower than 125K. At present, many manufacturers only consider the winding temperature rise in self-cooling state during product design, and ignore the direct influence of the installation mode of transformer fan in wind cooling state on transformer heat dissipation. The starting threshold of traditional dry-type transformer fan is set to 90 DEG C, and the back difference is 10 DEG C. When the temperature of transformer temperature controller reaches 100 DEG C, the fan starts to cool and dissipate heat, but it cannot adjust the blowing angle of the fan, and cannot effectively balance the wind cooling and heat dissipation capacity of high and low voltage windings to improve service life. SUMMARY

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the present application is to provide a wind cooling device for improving the load capacity of dry-type transformer and its working method, which is not only reasonable in structure, but also improves the service life.

[0004] In order to solve the above technical problems, the technical scheme of the present application is as follows: a wind cooling device for improving the load capacity of dry-type transformer, comprising a base for supporting the winding of dry-type transformer, the base is composed of left and right transversely extending mounting seats and front and rear longitudinally extending support beams, the support beams are located above the mounting seats and are parallel arranged, the outer ends of the two support beams are fixedly connected with bent support plates, the bent support plates are V-shaped, the V-shaped opening faces outward, the upper segment of the bent support plate is fixedly connected with the support beam, and the lower segment is fixedly provided with a fan on the upper surface.

[0005] Further, the bent support plate is integrally formed, and the fan is fixedly connected with the bent support plate on the upper surface through angle steel and bolt.

[0006] Further, the upper and lower sections of the bending support plate are angle-adjusted by a ratchet and pawl, the top of the lower section of the bending support plate is fixed with a ratchet wheel, the outer periphery of the ratchet wheel is provided with a ratchet clamping groove, the ratchet wheel is hingedly connected with the bottom end of the upper section of the bending support plate through a pin shaft, the bottom end of the upper section of the bending support plate is also hingedly connected with a pawl through a pin shaft, the end of the pawl is fixed with a clamping tooth for clamping and limiting the ratchet clamping groove, a torsion spring is arranged on the pin shaft of the pawl to provide the elastic force required for the pawl to rotate towards the ratchet wheel, the outer side of the clamping end of the pawl is fixed with a pulling block, the pulling block is fixedly connected with a pulling rope, the pulling rope extends out of the bending support plate, the outer end of the pulling block is fixedly connected with a spring, one end of the spring is abutted on the pulling block, and the other end is abutted on the inner wall of the bending support plate, and the specific working method is as follows: first, the lower section of the bending support plate is upwardly rotated for angle adjustment, the ratchet wheel rotates in the direction of the pawl during rotation, and clamping is not caused, but the pawl is always clamped on the ratchet wheel under the action of the torsion spring, the pawl is abutted in the ratchet clamping groove after the angle is adjusted and stopped rotating, and the ratchet wheel is prevented from rotating in the reverse direction, the lower section of the bending support plate is downwardly rotated only by pulling the pulling rope, the spring is compressed, the pawl is separated from the ratchet clamping groove, then the lower section of the bending support plate can be downwardly turned over, the pulling rope is loosened after the angle adjustment is completed, the spring is stretched, and the pawl is reset and clamped in the ratchet clamping groove again, so that the angle can be adjusted.

[0007] Further, the upper and lower sections of the bending support plate are angle-adjusted by a ratchet and pawl, the top of the lower section of the bending support plate is fixed with a ratchet wheel, the outer periphery of the ratchet wheel is provided with a ratchet clamping groove, the ratchet wheel is hingedly connected with the bottom end of the upper section of the bending support plate through a pin shaft, the bottom end of the upper section of the bending support plate is also hingedly connected with a pawl through a pin shaft, the end of the pawl is fixed with a clamping tooth for clamping and limiting the ratchet clamping groove, a torsion spring is arranged on the pin shaft of the pawl to provide the elastic force required for the pawl to rotate towards the ratchet wheel, the outer side of the clamping end of the pawl is fixed with a pulling block, the pulling block is fixedly connected with a pulling rope, the pulling rope extends out of the bending support plate, the outer end of the pulling block is fixedly connected with a spring, one end of the spring is abutted on the pulling block, and the other end is abutted on the inner wall of the bending support plate, and the specific working method is as follows: first, the lower section of the bending support plate is upwardly rotated for angle adjustment, the ratchet wheel rotates in the direction of the pawl during rotation, and clamping is not caused, but the pawl is always clamped on the ratchet wheel under the action of the torsion spring, the pawl is abutted in the ratchet clamping groove after the angle is adjusted and stopped rotating, and the ratchet wheel is prevented from rotating in the reverse direction, the lower section of the bending support plate is downwardly rotated only by pulling the pulling rope, the spring is compressed, the pawl is separated from the ratchet clamping groove, then the lower section of the bending support plate can be downwardly turned over, the pulling rope is loosened after the angle adjustment is completed, the spring is stretched, and the pawl is reset and clamped in the ratchet clamping groove again, so that the angle can be adjusted.

[0008] Further, the bending support plates are arranged on the support beam in front and back, and the angle steels fixedly arranged on the bending support plates are used to install and fix the fan.

[0009] Compared with the prior art, the present application has the following beneficial effects: by adjusting the blowing angle of the fan, the air cooling heat dissipation capacity of the high and low voltage windings can be effectively balanced, the temperature rise of the high and low windings can be reduced, the load capacity of the transformer can be effectively improved, the service life can be improved, and the reliability of the transformer can be obviously improved.

[0010] The application will be further described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 This is a schematic diagram illustrating the structure of an embodiment of the present invention;

[0012] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0013] Figure 3 This is a top view schematic diagram of an embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of the internal structure of the ratchet and pawl in an embodiment of the present invention;

[0015] Figure 5 This is a schematic diagram showing the connection between the cylinder and the bending support plate in an embodiment of the present invention.

[0016] In the diagram: 1-base, 2-mounting seat, 3-support beam, 4-bent support plate, 5-fan, 6-ratchet, 7-pawl, 8-ratchet wheel, 9-ratchet slot, 10-torsion spring, 11-pull block, 12-pull rope, 13-spring, 14-cylinder, 15-support plate, 16-angle steel, 17-tooth, 18-pin, 19-upper section of bent support plate, 20-lower section of bent support plate, 21-dry-type transformer winding. Detailed Implementation

[0017] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0018] like Figures 1-5 As shown, an air-cooled device for improving the load capacity of a dry-type transformer includes a base 1 for supporting the winding 21 of the dry-type transformer. The base is composed of a mounting seat 2 extending laterally to the left and right and a support beam 3 extending longitudinally to the front and back. The support beam is located above the mounting seat and is arranged in parallel. The outer ends of the two support beams are fixedly connected to bent support plates 4. The bent support plates are V-shaped with the V opening facing outward. The upper section of the bent support plates is fixedly connected to the support beam, and the lower upper surface of the bent support plates is fixedly equipped with a fan 5. The air outlet of the fan faces inward.

[0019] Embodiment 1 of the present invention: The bent support plate is integrally formed, and a fan is fixed to its upper surface by angle steel and bolts.

[0020] In the embodiment 2 of the present application, the upper section and the lower section of the bent support plate are adjusted in angle by the ratchet wheel 6 and the pawl 7, the top of the lower section of the bent support plate is fixed with the ratchet wheel disc 8, the outer periphery of the ratchet wheel disc is provided with the ratchet wheel clamping groove 9, the ratchet wheel disc is hinged to the bottom end of the upper section of the bent support plate through the pin shaft 18, the bottom end of the upper section 19 of the bent support plate is also hinged to the pawl through the pin shaft, the end of the pawl is fixed with the clamping tooth 17 which is clamped and limited by the ratchet wheel clamping groove, the pin shaft on which the pawl is installed is also provided with the torsion spring 10 which provides the elastic force required for the pawl to rotate towards the ratchet wheel, the outer side of the clamping end of the pawl is fixed with the pulling block 11, the pulling block is fixed with the pulling rope 12 which extends out of the bent support plate, the outer end of the pulling block is fixed with the spring 13, one end of the spring is abutted on the pulling block, and the other end is abutted on the inner wall of the bent support plate; the lower section 20 of the bent support plate is rotated upwards to adjust the angle, when the ratchet wheel is rotated in the direction of the pawl, the clamping will not be caused, but the pawl is always clamped on the ratchet wheel under the action of the torsion spring, when the angle is adjusted and the rotation is stopped, the pawl is clamped in the ratchet wheel clamping groove to prevent the ratchet wheel from rotating reversely, when the lower section of the bent support plate needs to be rotated downwards, the pulling rope is only pulled, the spring is compressed, the pawl is separated from the ratchet wheel clamping groove, then the lower section of the bent support plate can be turned downwards, when the angle adjustment is completed, the pulling rope is loosened, the spring is stretched, and the pawl is reset in the ratchet wheel clamping groove under the action of the torsion spring, so that the angle adjustment is realized.

[0021] In the embodiment 3 of the present application, the upper section and the lower section of the bent support plate are hinged through the pin shaft, the upper section is fixed on the support beam through the bolt, and the bottom end of the lower section is supported and adjusted by the air cylinder 14 which is fixed on the mounting seat and has the output end fixed with the bent support plate lower section through the support plate 15, when used, the angle adjustment of the bent support plate lower section is realized by starting the air cylinder to lift and lower.

[0022] In the embodiment of the present application, the bent support plates are arranged on the support beam in front and back, and the angle steels 16 which are arranged in front and back and are fixed on the bent support plates are used to install and fix the fan.

[0023] The present application is not limited to the above best embodiment, and anyone can derive other various forms of the air cooling device for improving the load capacity of the dry-type transformer and the working method thereof under the inspiration of the present application. Any equivalent changes and modifications made within the scope of the patent application of the present application shall be included in the scope of the present application.

Claims

1. A forced air cooling device for increasing the load capacity of a dry-type transformer, characterized by: The application relates to a wind cooling device for improving the load capacity of a dry-type transformer, which comprises a base for supporting the winding of the dry-type transformer, wherein the base is fixedly connected by left and right transversely-extending mounting seats and front and rear longitudinally-extending support beams, the support beams are arranged above the mounting seats and are parallel to each other, the outer ends of the two support beams are fixedly connected with bent support plates, the bent support plates are V-shaped, the V-shaped openings of the bent support plates are outward, the upper sections of the bent support plates are fixedly connected with the support beams, the upper surfaces of the lower sections of the bent support plates are fixedly provided with fans, the air outlets of the fans are inward, the upper section and the lower section of the bent support plate are angle-adjusted by a ratchet and pawl assembly, a ratchet wheel is fixedly arranged on the top of the lower section of the bent support plate, a ratchet clamping groove is arranged on the outer periphery of the ratchet wheel, the bottom end of the upper section of the bent support plate is hingedly connected with the ratchet wheel through a pin shaft, the bottom end of the upper section of the bent support plate is also hingedly connected with a pawl through a pin shaft, the end of the pawl is fixedly provided with a clamping tooth for clamping and limiting the ratchet clamping groove, a torsion spring is arranged on the pin shaft of the pawl, the spring provides the pawl with the elastic force required for rotating the pawl towards the ratchet wheel, a pulling block is fixedly arranged outside the clamping end of the pawl, a pulling rope is fixedly connected with the pulling block, the pulling rope extends out of the bent support plate, the outer end of the pulling block is fixedly connected with a spring, one end of the spring is abutted against the pulling block, and the other end of the spring is abutted against the inner wall of the bent support plate. The upper section and the lower section of the bent support plate are hingedly connected through a pin shaft, the upper section of the bent support plate is fixedly connected with the support beam through bolts, and the bottom end of the lower section of the bent support plate is adjusted and supported by a cylinder, the cylinder is fixedly connected with the mounting seat, and the output end of the cylinder is fixedly connected with the lower section of the bent support plate through a supporting plate.

2. The air cooling device for improving the load capacity of a dry-type transformer according to claim 1, characterized in that: The bent support plate is integrally formed, and the upper surface of the bent support plate is fixedly connected with the fan through an angle steel and bolts.

3. The air cooling device for improving the load capacity of a dry-type transformer according to any one of claims 1-2, characterized in that: The bent support plates are arranged on the support beams in front and back, and the fans are fixedly arranged on the angle steels which are fixedly arranged on the bent support plates and extend in front and back.

4. A method for operating an air-cooled device to improve the load capacity of a dry-type transformer, characterized in that, The wind cooling device for improving the load capacity of the dry-type transformer is used, and the following steps are performed: firstly, the lower section of the bent support plate is upwardly rotated for angle adjustment, the ratchet wheel is rotated along the direction of the pawl during the rotation, and the ratchet wheel cannot be clamped, but the pawl is always clamped on the ratchet wheel under the action of the torsion spring, the rotation is stopped after the angle is adjusted, the pawl is abutted against the ratchet clamping groove, and the ratchet wheel is prevented from being reversely rotated, the pulling rope is pulled only when the lower section of the bent support plate needs to be downwardly rotated, the spring is compressed, the pawl is separated from the ratchet clamping groove, then the lower section of the bent support plate can be downwardly rotated, the pulling rope is released after the angle adjustment is completed, the spring is stretched, the pawl is reset under the action of the torsion spring, the pawl is clamped in the ratchet clamping groove again, and the angle is adjustable.

5. A method for operating an air-cooled device to improve the load capacity of a dry-type transformer, characterized in that, The wind cooling device for improving the load capacity of the dry-type transformer is used, and the following steps are performed: when the angle between the upper section and the lower section of the bent support plate needs to be reduced, the cylinder is started, the piston rod of the cylinder is lifted, the supporting plate and the lower section of the bent support plate are synchronously lifted, the lower section of the bent support plate is upwardly rotated around the hinge point, and the angle reduction adjustment is completed, when the angle between the upper section and the lower section of the bent support plate needs to be increased, the piston rod is lowered, the lower section of the bent support plate is downwardly rotated around the hinge point, and the angle adjustment is completed.

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