Exhaust device for radiating fins of oil-immersed transformer

Abstract

The utility model discloses an oil-immersed transformer radiating fin exhaust device which comprises a plug seat and a plug cap, a circle of groove is arranged on the periphery of the plug seat, a sealing ring is placed in the groove, the upper end of the plug cap is closed, the lower end of the plug cap is provided with a bottom end face, and the upper end of the sealing ring is contacted with the bottom end face of the plug cap. A deflation bolt is fixedly arranged at the top end in the plug cap and comprises a top cap and a threaded rod arranged at the lower end of the top cap, the threaded rod is provided with a first air channel, a second air channel and a third air channel, and a groove for sealing is formed in the periphery of the plug seat, so that the sealing area is increased, and the sealing performance of the whole device is improved; through the arrangement of the second air channel and the third air channel, the plug component does not need to be screwed off in the deflation process, a large amount of transformer oil is prevented from flowing out, the deflation operation is adjustable, the oil drainage rhythm is effectively controlled, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of box-type transformer substations, in particular to an exhaust device for a heat sink of an oil-immersed transformer. Background Art

[0002] The plate radiator is a cooling device used in oil-immersed transformers. The hot oil in the upper part of the transformer oil tank enters the upper oil collecting pipe of the plate radiator, flows through the heat sink, and then flows back to the transformer oil tank from the lower oil collecting pipe of the plate radiator. When the hot oil flows in the heat sink, the heat is transferred to the air to achieve the purpose of heat dissipation, so as to ensure the safe operation of the transformer. The plate radiator is composed of heat sink, oil collecting pipe, air vent plug, oil drain plug, lifting ring and connecting flange.

[0003] The traditional radiator exhaust plug has the following technical defects due to its unreasonable structure: the sealing gasket is limited in position and sealing area, and is prone to aging and hardening, which leads to a decrease in sealing effect. As the transformer is used for a long time, the defect rate of exhaust plug oil leakage gradually increases. When replacing the gasket, due to the influence of oil pressure, transformer oil gushes out after the exhaust plug cover is unscrewed. On the one hand, the transformer oil gushes affects the quality of the replacement of the gasket, and on the other hand, it also causes waste of transformer insulating oil and environmental pollution. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an oil-immersed transformer heat sink exhaust device with reasonable structural design and convenient and controllable operation, which solves the problems of oil leakage and inconvenient replacement of the exhaust plug of the plate-type radiator product.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is:

[0006] An oil-immersed transformer heat sink exhaust device comprises a plug seat and a plug cap. The plug seat is connected to a heat sink oil collecting pipe. A circle of grooves is arranged around the plug seat. A sealing ring is placed in the groove. The upper end of the plug cap is closed. A bottom end surface is arranged at the lower end of the outer periphery. The upper end of the sealing ring contacts the bottom end surface of the plug cap. A bleed bolt is fixedly arranged at the top end of the plug cap. The plug cap is connected to the plug seat through the bleed bolt.

[0007] The bleed bolt includes a top cap and a threaded rod arranged at the lower end of the top cap. The threaded rod and the top cap are perpendicular to each other and are an integrated structure. A first air channel is arranged at the axial center of the threaded rod, and a second air channel and a third air channel are arranged radially of the threaded rod. The second air channel and the third air channel are both connected to the first air channel and are perpendicular to each other.

[0008] The center of the plug seat is the main airway, which is provided with an internal thread, the threaded rod is connected with the airway thread, and the first airway is communicated with the main airway.

[0009] Furthermore, the second airway and the third airway are not on the same horizontal plane, and the second airway is located at a higher position.

[0010] Furthermore, the aperture of the third airway is larger than that of the second airway. By setting different heights and different apertures, it is convenient for operators to gradually perform air and oil release operations.

[0011] The top cap is welded to the inner top of the plug cap, and the inner radius of the bottom end surface of the plug cap is greater than the inner radius of the annular groove of the plug seat.

[0012] Furthermore, the bottom end of the plug seat is configured as an arc-shaped structure and is connected to the oil collecting pipe.

[0013] The beneficial effects of the utility model are:

[0014] By providing a sealing groove on the periphery of the plug seat, the sealing area can be significantly increased. When the plug cap is tightened, the bottom end surface of the plug cap will compress the sealing ring component, so that the bottom end surface of the plug cap fits with the plug seat, thereby increasing the sealing performance of this structure.

[0015] A first air passage, a second air passage and a third air passage connected with the first air passage are arranged at the center of the plug component. When releasing air or oil, air and oil can be released through the first air passage, the second air passage and the third air passage without unscrewing the entire plug component, thereby preventing a large amount of transformer oil from flowing out. In addition, the setting of different height apertures makes the release operation adjustable, effectively controls the rhythm of oil release, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model.

[0017] As shown in the figure, 1-plug seat, 2-plug cap, 3-bleed bolt, 4-groove, 5-bottom end surface, 6-main air channel, 7-first air channel, 8-second air channel, 9-third air channel. DETAILED DESCRIPTION

[0018] Combined with Figure 1 The utility model is described in detail.

[0019] like Figure 1 The oil-immersed transformer heat sink exhaust device shown in the figure comprises a plug seat and a plug cap. The plug seat is connected to the heat sink oil collecting pipe. A circle of grooves is arranged around the plug seat. A sealing ring is placed in the groove. The upper end of the plug cap is closed. A bottom end surface is arranged at the lower end of the outer periphery. The upper end of the sealing ring contacts the bottom end surface of the plug cap. A bleed bolt is fixedly arranged at the top end of the plug cap. The plug cap is connected to the plug seat through the bleed bolt.

[0020] The bleed bolt includes a top cap and a threaded rod arranged at the lower end of the top cap. The threaded rod and the top cap are perpendicular to each other and are an integrated structure. A first air channel is arranged at the axial center of the threaded rod, and a second air channel and a third air channel are arranged radially of the threaded rod. The second air channel and the third air channel are both connected to the first air channel and are perpendicular to each other.

[0021] The center of the plug seat is the main airway, which is provided with an internal thread, the threaded rod is connected with the airway thread, and the first airway is communicated with the main airway.

[0022] Furthermore, the second airway and the third airway are not on the same horizontal plane, and the second airway is located at a higher position.

[0023] Furthermore, the aperture of the third airway is larger than that of the second airway. By setting different heights and different apertures, it is convenient for operators to gradually perform air and oil release operations.

[0024] The top cap is welded to the inner top of the plug cap, and the inner radius of the bottom end surface of the plug cap is greater than the inner radius of the annular groove of the plug seat.

[0025] Furthermore, the bottom end of the plug seat is configured as an arc-shaped structure and is connected to the oil collecting pipe.

[0026] The plug cap and the plug seat are both made of metal, and the sealing ring can be made of a larger size and highly weather-resistant material to increase the service life of the sealing ring component.

[0027] Compared with the existing radiator air release sealing structure, the sealing area can be significantly increased by arranging a sealing groove on the periphery of the plug seat. When tightening the plug cap, the bottom end surface of the plug cap will compress the sealing ring component, so that the bottom end surface of the plug cap fits with the plug seat, thereby increasing the sealing performance of this structure. A first air channel, a second air channel and a third air channel connected to the first air channel are arranged at the center of the plug component. When releasing air or draining oil, air and oil can be released through the first air channel, the second air channel and the third air channel without unscrewing the entire plug component, thereby preventing a large amount of transformer oil from flowing out. Moreover, the setting of different height apertures makes the air release operation adjustable, effectively controls the rhythm of oil release, and is easy to operate. The whole device is simple, compact, low-cost, and highly weather-resistant, which solves the problems of oil leakage and poor sealing of the air release device of the plate-type radiator product, as well as time-consuming and labor-intensive later maintenance.

[0028] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. An oil-immersed transformer heat sink exhaust device, characterized in that: It includes a plug seat and a plug cap. The plug seat is connected to the heat sink oil collecting pipe. A circle of grooves is arranged around the plug seat. A sealing ring is placed in the groove. The upper end of the plug cap is closed. A bottom end face is arranged at the lower end of the outer periphery. The upper end of the sealing ring contacts the bottom end face of the plug cap. A bleed bolt is fixedly arranged at the top of the plug cap. The plug cap is connected to the plug seat through the bleed bolt. The bleed bolt includes a top cap and a threaded rod arranged at the lower end of the top cap. The threaded rod and the top cap are perpendicular to each other and are an integrated structure. A first air channel is arranged at the axial center of the threaded rod, and a second air channel and a third air channel are arranged radially of the threaded rod. The second air channel and the third air channel are both connected to the first air channel and are perpendicular to each other.

2. The oil-immersed transformer heat sink exhaust device according to claim 1, characterized in that: The center of the plug seat is the main airway, which is provided with an internal thread, the threaded rod is connected with the airway thread, and the first airway is communicated with the main airway.

3. The oil-immersed transformer heat sink exhaust device according to claim 1, characterized in that: The second airway and the third airway are not on the same horizontal plane, and the second airway is located at a higher level.

4. The oil-immersed transformer heat sink exhaust device according to claim 1, characterized in that: The aperture of the third air channel is larger than the aperture of the second air channel.

5. The oil-immersed transformer heat sink exhaust device according to claim 1, characterized in that: The top cap is welded to the inner top of the plug cap, and the inner radius of the bottom end surface of the plug cap is greater than the inner radius of the annular groove of the plug seat.

6. The oil-immersed transformer heat sink exhaust device according to claim 1, characterized in that: The bottom end of the plug seat is arranged in an arc-shaped structure and is connected to the oil collecting pipe.

Images