Pressure release device of oil-immersed transformer

Abstract

The utility model discloses a pressure relief device of an oil-immersed transformer, which relates to the technical field of oil-immersed transformers and comprises a shell, an air outlet box is fixedly connected to the middle of the upper side of the shell, a plurality of air outlet holes are formed in the upper end of the air outlet box in a penetrating manner, and a threaded pipe is fixedly connected to the lower side of the shell. Limiting plates are fixedly connected to the left side and the right side of an inner bottom plate of the shell correspondingly, when pressure on the lower side of the interior of the shell is upward, a piston moves upwards to drive a connecting column to move upwards, the connecting column moves upwards to drive a connecting plate to move upwards, and the connecting plate drives a compression spring to deform; gas in the shell is discharged from the gas outlet box installed at the upper end of the shell, discharged oil flows into the collecting box in the collecting box from the oil outlet pipe and the oil guide pipe, and the situation that the surface of the transformer is corroded and damaged due to the fact that the oil directly falls on the transformer or the periphery of the transformer is avoided, especially the metal surface exposed below the oil for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed transformers, in particular to a pressure release device for an oil-immersed transformer. Background Art

[0002] Oil-immersed transformers are a widely used type of power transformer that utilizes insulating oil to cool and insulate components within the transformer. This type of transformer is used to step up or down voltage to meet power demands in various applications. When the internal pressure of the transformer exceeds the designed safety threshold, if it is not released in time, it may cause deformation of the transformer tank, cracking of welds, or even explosion, resulting in serious equipment damage and safety accidents.

[0003] When the existing pressure relief device releases the pressure of the transformer, the oil in the transformer will spray out, which is not convenient for oil collection and will cause the oil to fall on the transformer, which may corrode and damage the transformer surface. When the metal surface is severely corroded, holes or cracks may appear, resulting in a decrease in the sealing of the transformer tank and an increased risk of oil leakage. Utility Model Content

[0004] In order to solve the above technical problems, a pressure relief device for an oil-immersed transformer is provided. This technical solution solves the problem that when the existing pressure relief device proposed in the above background technology releases the pressure of the transformer, the oil in the transformer will spray out, which is inconvenient to collect the oil and will cause the oil to fall on the transformer, which may corrode and damage the transformer surface. When the metal surface is severely corroded, holes or cracks may appear, resulting in a decrease in the sealing of the transformer oil tank and an increased risk of oil leakage.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a pressure relief device for an oil-immersed transformer, comprising a shell, an air outlet box fixedly connected to the middle position of the upper side of the shell, a plurality of air outlet holes are penetrated through the upper end of the air outlet box, a threaded tube is fixedly connected to the lower side of the shell, the left and right sides of the inner bottom plate of the shell are fixedly connected to the limit plates, the front and rear side walls inside the shell are provided with sliding grooves, the left side of the shell is fixedly connected to an oil outlet pipe, the lower side of the oil outlet pipe is provided with a collecting assembly, the collecting assembly includes an oil guide pipe, the upper end of the oil guide pipe is fixedly connected to the lower end of the oil outlet pipe, the lower left end of the shell is fixedly connected to a collecting box, the upper side of the collecting box is fixedly connected to the lower end of the oil guide pipe, the interior of the collecting box is slidably connected to the collecting box, and a handle is fixedly installed on the left side of the collecting box.

[0006] Preferably, a pressure relief assembly is provided inside the shell, and the pressure relief assembly includes a fixing plate, and the front and rear sides of the fixing plate are fixedly mounted on the front and rear side walls inside the shell respectively.

[0007] Preferably, a telescopic rod is fixedly connected to the middle position of the lower side of the fixed plate, a connecting plate is fixedly connected to the lower side of the telescopic rod, and a compression spring is fixedly connected between the connecting plate and the fixed plate.

[0008] Preferably, sliders are fixedly connected to the front and rear sides of the connecting plate, and the two sliders are slidably connected to the inside of the two groups of sliding grooves respectively, and the compression spring is sleeved on the outer surface of the telescopic rod.

[0009] Preferably, a connecting column is fixedly connected to the middle position of the lower side of the connecting plate, a piston is fixedly connected to the lower end of the connecting column, and the piston is slidably connected between the two limiting plates.

[0010] Compared with the prior art, the present invention provides a pressure relief device for an oil-immersed transformer, which has the following beneficial effects:

[0011] When the pressure on the lower side of the shell is upward, the piston moves upward, driving the connecting column to move upward, and the upward movement of the connecting column drives the connecting plate to move upward, and the connecting plate drives the compression spring to deform. When the piston breaks away from the two limit plates, the gas in the shell is discharged from the air outlet box installed at the upper end of the shell, and the discharged oil flows from the oil outlet pipe and the oil guide pipe to the collection box in the collection box, so as to prevent the oil from directly falling on the transformer or the surrounding area and causing corrosion and damage to the transformer surface, especially the metal surface exposed to the oil for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the housing in the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the collection component in the present utility model;

[0015] Figure 4 It is a structural schematic diagram of the pressure release component in the utility model.

[0016] The numbers in the figure are:

[0017] 1. Shell; 2. Air outlet box; 3. Air outlet hole; 4. Threaded pipe; 5. Oil outlet pipe;

[0018] 6. Collection assembly; 601. Oil guide tube; 602. Collection box; 603. Collection box; 604. Handle;

[0019] 7. Limit plate; 8. Slide;

[0020] 9. Pressure release assembly; 901. Fixed plate; 902. Telescopic rod; 903. Compression spring; 904. Connecting plate; 905. Slider; 906. Connecting column; 907. Piston. DETAILED DESCRIPTION

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0022] Reference Figure 1-4 As shown, a pressure relief device for an oil-immersed transformer includes a shell 1, an air outlet box 2 is fixedly connected to the middle position of the upper side of the shell 1, and a plurality of air outlet holes 3 are opened through the upper end of the air outlet box 2, and a threaded pipe 4 is fixedly connected to the lower side of the shell 1. The interior of the threaded pipe 4 is hollow and the threads and joints at the connection of the threaded pipe 4 match the interface of the transformer. The left and right sides of the inner bottom plate of the shell 1 are fixedly connected to limit plates 7, and the two limit plates 7 guide the slidingly connected piston 907. When the internal pressure of the shell 1 increases, the piston 907 moves upward along the two limit plates 7. The front and rear side walls of the shell 1 are both provided with slide grooves 8. The left side of the shell 1 is fixedly connected to an oil outlet pipe 5. The oil outlet pipe 5 A collecting assembly 6 is provided on the lower side of the housing 1, and the collecting assembly 6 includes an oil guide pipe 601. The upper end of the oil guide pipe 601 is fixedly connected to the lower end of the oil outlet pipe 5. The oil inside the housing 1 flows into the collecting box 603 through the oil guide pipe 601 and the oil outlet pipe 5 to prevent the oil from falling on the transformer or the surrounding area and causing corrosion and damage to the transformer surface. The lower left end of the housing 1 is fixedly connected with a collecting box 602, and the upper side of the collecting box 602 is fixedly connected to the lower end of the oil guide pipe 601. The interior of the collecting box 603 is slidably connected to the collecting box 603, and a handle 604 is fixedly installed on the left side of the collecting box 603. The collecting box 603 is pulled out from the inside of the collecting box 602 through the handle 604 to process the oil in the collecting box 603.

[0023] Reference Figure 2 and Figure 4As shown, a pressure release assembly 9 is provided inside the housing 1, and the pressure release assembly 9 includes a fixing plate 901. The front and rear sides of the fixing plate 901 are fixedly mounted on the front and rear side walls inside the housing 1 respectively. A telescopic rod 902 is fixedly connected to the middle position of the lower side of the fixing plate 901. The lower side of the telescopic rod 902 is fixedly connected to a connecting plate 904. A compression spring 903 is fixedly connected between the connecting plate 904 and the fixing plate 901. Sliders 905 are fixedly connected to the front and rear sides of the connecting plate 904. The slides 905 on the front and rear sides of the connecting plate 904 slide in the slide groove 8 to improve stability. When the piston 90 7 is more stable when moving upward under the pressure. The two sliders 905 are respectively slidably connected to the inside of the two sets of slide grooves 8. The compression spring 903 is sleeved on the outer surface of the telescopic rod 902. The middle position of the lower side of the connecting plate 904 is fixedly connected to the connecting column 906. The lower end of the connecting column 906 is fixedly connected to the piston 907. When the piston 907 is separated from the two limit plates 7, the gas in the shell 1 is discharged from the air outlet box 2 installed at the upper end of the shell 1, and the oil flows from the oil outlet pipe 5 and the oil guide pipe 601 to the collection box 603 in the collection box 602. The piston 907 is slidably connected between the two limit plates 7.

[0024] The working principle and use process of the utility model are as follows: when in use, the pressure relief device is installed on the transformer through the threaded tube 4. When the pressure inside the shell 1 increases, the pressure will drive the piston 907 to move upward between the two limit plates 7. The upward movement of the piston 907 drives the connecting column 906 to move upward. The connecting column 906 drives the connecting plate 904 to move upward. The sliders 905 on the left and right sides of the connecting plate 904 move in the slide groove 8. The connecting plate 904 drives the telescopic rod 902 to extend and retract. The compression spring 903 is generated during the upward movement of the connecting plate 904. Deformation, when the piston 907 breaks away from the two limit plates 7, oil and air enter the upper part of the shell 1, and the air enters the air outlet box 2 installed on the upper part of the shell 1 and is released through the air outlet 3 to realize the pressure release. When the pressure is relieved, the oil flows from the oil outlet pipe 5 into the guide pipe, and follows the guide pipe into the collection box 603 inside the collection box 602, so as to prevent the oil from falling directly on the transformer or the surrounding area and causing corrosion and damage to the transformer surface. The collection box 603 is taken out from the collection box 602 through the handle 604, and the oil inside the collection box 603 is processed.

[0025] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure relief device for an oil-immersed transformer, characterized in that: The invention comprises a shell (1), wherein an air outlet box (2) is fixedly connected to the middle position of the upper side of the shell (1), a plurality of air outlet holes (3) are formed through the upper end of the air outlet box (2), a threaded pipe (4) is fixedly connected to the lower side of the shell (1), a limit plate (7) is fixedly connected to the left and right sides of the inner bottom plate of the shell (1), a slide groove (8) is formed on the front and rear side walls of the inner side of the shell (1), an oil outlet pipe (5) is fixedly connected to the left side of the shell (1), and the lower end of the oil outlet pipe (5) is fixedly connected to the oil outlet pipe (5). A collecting assembly (6) is provided on the side, the collecting assembly (6) comprising an oil guide pipe (601), the upper end of the oil guide pipe (601) is fixedly connected to the lower end of the oil outlet pipe (5), the left lower end of the shell (1) is fixedly connected to a collecting box (602), the upper side of the collecting box (602) is fixedly connected to the lower end of the oil guide pipe (601), the interior of the collecting box (603) is slidably connected to the collecting box (603), and a handle (604) is fixedly installed on the left side of the collecting box (603).

2. The pressure relief device for an oil-immersed transformer according to claim 1, characterized in that: A pressure release assembly (9) is provided inside the shell (1), and the pressure release assembly (9) comprises a fixing plate (901), and the front and rear sides of the fixing plate (901) are respectively fixedly mounted on the front and rear side walls inside the shell (1).

3. The pressure relief device for an oil-immersed transformer according to claim 2, characterized in that: A telescopic rod (902) is fixedly connected to the middle position of the lower side of the fixed plate (901), a connecting plate (904) is fixedly connected to the lower side of the telescopic rod (902), and a compression spring (903) is fixedly connected between the connecting plate (904) and the fixed plate (901).

4. The pressure relief device for an oil-immersed transformer according to claim 3, characterized in that: The front and rear sides of the connecting plate (904) are fixedly connected with sliders (905), and the two sliders (905) are respectively slidably connected to the inside of the two groups of slide grooves (8), and the compression spring (903) is sleeved on the outer surface of the telescopic rod (902).

5. The pressure relief device for an oil-immersed transformer according to claim 3, characterized in that: A connecting column (906) is fixedly connected to the middle position of the lower side of the connecting plate (904), a piston (907) is fixedly connected to the lower end of the connecting column (906), and the piston (907) is slidably connected between the two limiting plates (7).

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