Oil-immersed transformer radiator welding deslagging stopper rod

Abstract

The utility model relates to a slag removal stopper rod for welding a radiator of an oil-immersed transformer, which not only can prevent splashing welding slag from entering a radiating fin through a radiating fin oil pipe during inner full-length welding, but also is convenient and reliable to use and low in production cost, and brings out fine welding slag attached to the inner wall surface of a pipe hole in the pulling-out process. A plug rod is arranged on the back face of the plug head plate, the rubber plug is a cylindrical plug, a round groove is formed in the back face of the rubber plug, the symmetrical center line of the round groove coincides with the symmetrical center line of the cylindrical plug, the plug head plate is a round plate, and the front face of the plug head plate is fixedly connected with the inner bottom face of the round groove. The symmetrical center line of the circular groove coincides with the symmetrical center line of the plug plate, the symmetrical center line of the plug rod coincides with the symmetrical center line of the plug plate, and the diameter of the rubber plug is matched with the diameter of a pipe hole of the cooling fin oil pipe. The slag removal stopper rod for the oil change radiator has the advantages that splashing welding slag can be prevented from entering the radiating fins through the radiating fin oil pipes during inner full-length welding, and the slag removal stopper rod is convenient and reliable to use.

Description

Technical Field

[0001] The utility model belongs to the field of transformer oil tank manufacturing, and in particular relates to a welding slag removal plug rod for an oil-immersed transformer radiator. Background Art

[0002] The transformer oil tank is an important part of the oil-immersed transformer. The transformer oil tank includes an oil tank body and a heat sink. A heat sink oil pipe is provided on one side of the heat sink. The heat sink is fixedly mounted on the oil tank body through the outer end of the heat sink oil pipe and the corresponding oil pipe mounting hole in the oil tank body through sealing welding. The oil in the oil tank body can enter the corresponding heat sink through the oil pipe, and the oil in the heat sink can also flow back to the oil tank body through the oil pipe. In order to ensure the sealing welding effect of the heat sink oil pipe and the oil tank body, as Figure 1 As shown, welding is performed at the intersection of the heat sink oil pipe and the outer wall of the oil tank body (external full welding), and welding is also performed at the intersection of the heat sink oil pipe and the inner wall of the oil tank body (internal full welding); during internal full welding, due to the splashing of welding slag, there is a certain probability that the welding slag enters the heat sink through the heat sink oil pipe, and the welding slag that falls into the heat sink rusts and turns yellow, affecting the insulation performance of the oil, thereby causing an accident; for this reason, our company designs a welding slag removal plug for oil-immersed transformer radiator to solve the above problems. Utility Model Content

[0003] Design purpose: In order to avoid the shortcomings of the background technology, an oil-immersed transformer radiator welding slag removal plug rod is designed, which can not only prevent the splashing welding slag from entering the heat sink through the heat sink oil pipe during full internal welding, but also is easy and reliable to use, has low production cost, and can remove the fine welding slag attached to the inner wall of the tube hole during the pulling process.

[0004] Design plan: To achieve the above design objectives.

[0005] 1. The rubber plug is a cylindrical plug, and a circular groove is provided on the back of the rubber plug. The symmetric center line of the circular groove coincides with the symmetric center line of the cylindrical plug. The plug head plate is a circular plate, and the front surface of the plug head plate is fixedly connected to the inner bottom surface of the circular groove. The symmetric center line of the circular groove coincides with the symmetric center line of the plug head plate. The symmetric center line of the plug rod coincides with the symmetric center line of the plug head plate. The design that the diameter of the rubber plug matches the hole diameter of the radiator oil pipe to be welded is one of the technical features of the present utility model. The purpose of such design is as follows: The rubber plug is a cylindrical plug, and a circular groove is provided on the back of the rubber plug. The symmetric center line of the circular groove coincides with the symmetric center line of the cylindrical plug. The plug head plate is a circular plate, and the front surface of the plug head plate is fixedly connected to the inner bottom surface of the circular groove. The symmetric center line of the circular groove coincides with the symmetric center line of the plug head plate. The symmetric center line of the plug rod coincides with the symmetric center line of the plug head plate. The diameter of the rubber plug matches the hole diameter of the radiator oil pipe to be welded. When performing internal full welding at the intersection of the radiator oil pipe and the inner wall surface of the fuel tank body, the welder holds the plug rod and inserts the rubber plug into the hole of the radiator oil pipe. At this time, the rubber plug and the hole achieve plug-in fit, and the tail end of the plug rod is located inside the fuel tank body. Then the welder performs internal full welding. After the internal full welding is completed, the welder can use a slag-removing plug rod for an oil-immersed transformer radiator welding. This avoids accidents caused by splashed welding slag entering the radiator through the radiator oil pipe during internal full welding (the welding slag falling into the radiator affects the insulation performance of the oil due to rusting and yellowing, thus causing accidents). In addition, the slag-removing plug rod for an oil-immersed transformer radiator welding is not only convenient and reliable to use, but also has a simple structure and low production cost.

[0006] 2. The outer circumferential surface of the rubber plug is provided with multiple annular protrusions. The design that the annular protrusions and the hole of the radiator oil pipe achieve interference fit when the rubber plug is inserted into the hole of the radiator oil pipe is the second technical feature of the present utility model. The purpose of such design is as follows: The outer circumferential surface of the rubber plug is provided with multiple annular protrusions. The annular protrusions and the hole of the radiator oil pipe achieve interference fit when the rubber plug is inserted into the hole of the radiator oil pipe. The setting of multiple annular protrusions can ensure that the welding slag can bring out the fine welding slag attached to the inner wall surface of the hole of the radiator oil pipe during the pulling process. At the same time, compared with the overall interference fit between the outer circumferential surface of the rubber plug and the hole, the interference fit between the annular protrusions and the hole of the radiator oil pipe is more labor-saving when pulling out the slag-removing plug rod for an oil-immersed transformer radiator welding from the radiator oil pipe.

[0007] 3. The plug head plate is a metal plate, the plug rod is a threaded rod. A connecting block is welded to the back of the metal plate, and a threaded hole matching the threaded rod is provided on the outer end face of the connecting block. The threaded rod is screwed onto the plug head plate through one end of the threaded rod. This design on the plug head plate is the third technical feature of the present utility model. The purpose of this design is as follows: The plug head plate is a metal plate, the plug rod is a threaded rod. A connecting block is welded to the back of the metal plate, and a threaded hole matching the threaded rod is provided on the outer end face of the connecting block. The threaded rod is screwed onto the plug head plate through one end of the threaded rod. Since the plug head plate and the plug rod are detachable, the plug rod can be used on rubber plugs and plug head plates of different sizes (radiator oil pipes of different sizes require matching rubber plugs), thereby reducing the usage cost of a slag-removing plug rod for welding of an oil-immersed transformer radiator.

[0008] 4. The design that the connecting block is a nut is the fourth technical feature of the present utility model. The purpose of this design is as follows: The connecting block is a nut. The use of the nut can not only improve the production efficiency of a slag-removing plug rod for welding of an oil-immersed transformer radiator, but also further reduce the production cost of a slag-removing plug rod for welding of an oil-immersed transformer radiator.

[0009] Technical solution: A slag-removing plug rod for welding of an oil-immersed transformer radiator includes a plug head plate, a plug rod and a rubber plug. The plug rod is provided on the back of the plug head plate. The rubber plug is a cylindrical plug, and a circular groove is provided on the back of the rubber plug. The symmetric center line of the circular groove coincides with the symmetric center line of the cylindrical plug. The plug head plate is a circular plate, and the front surface of the plug head plate is fixedly connected to the inner bottom surface of the circular groove. The symmetric center line of the circular groove coincides with the symmetric center line of the plug head plate. The symmetric center line of the plug rod coincides with the symmetric center line of the plug head plate. The diameter of the rubber plug matches the diameter of the pipe hole of the radiator oil pipe to be welded.

[0010] Compared with the background technology, the present utility model has the following advantages: First, a slag-removing plug rod for welding of an oil-immersed transformer radiator can not only prevent the splashed welding slag from entering the radiator through the radiator oil pipe during full penetration welding, but also is convenient and reliable to use; Second, a slag-removing plug rod for welding of an oil-immersed transformer radiator not only has a low production cost, but also can bring out the fine welding slag adhering to the inner wall surface of the pipe hole during the pulling-out process. Description of the drawings

[0011] Figure 1 It is a partially sectional structural schematic diagram of the welding of the radiator and the oil tank body.

[0012] Figure 2 It is a structural schematic diagram of a slag-removing plug rod for welding of an oil-immersed transformer radiator. Specific embodiments

[0013] Example 1: Refer to the appendixFigure 2 An oil-immersed transformer radiator welding slag-removing plug rod, comprising a plug head plate 1, a plug rod 2 and a rubber plug 3. The back of the plug head plate 1 is provided with the plug rod 2. The rubber plug 3 is a cylindrical plug, and the back of the rubber plug 3 is provided with a circular groove 31. The symmetry center line of the circular groove 31 coincides with the symmetry center line of the cylindrical plug. The plug head plate 1 is a circular plate, and the front of the plug head plate 1 is fixedly connected to the inner bottom surface of the circular groove 31. The symmetry center line of the circular groove 31 coincides with the symmetry center line of the plug head plate 1. The symmetry center line of the plug rod 2 coincides with the symmetry center line of the plug head plate 1. The diameter of the rubber plug 3 matches the hole diameter of the radiator oil pipe to be welded.

[0014] A plurality of annular protrusions 32 are provided on the outer circumferential surface of the rubber plug 3. When the rubber plug 3 is inserted into the hole of the radiator oil pipe, the annular protrusions 32 and the hole of the radiator oil pipe achieve interference fit. The rubber plug 3 and the plurality of annular protrusions 32 are integrally injection-molded.

[0015] The plug head plate 1 is a metal plate, the plug rod 2 is a metal rod, and the metal rod is fixedly connected to the metal plate by welding. The plug head plate 1 is a metal plate, the plug rod 2 is a threaded rod, a connecting block 4 is welded to the back of the metal plate, and a threaded hole 41 matching the threaded rod is provided on the outer end surface of the connecting block 4. The threaded rod is screwed onto the plug head plate 1 through one end of the threaded rod and the threaded hole 41. The connecting block 4 is a nut.

[0016] When performing internal full welding at the junction of the radiator oil pipe and the inner wall surface of the fuel tank body, the welder holds the plug rod 2 and inserts the rubber plug 3 into the hole of the radiator oil pipe. At this time, the rubber plug 3 and the hole achieve plug-in fit, and the tail end of the plug rod 2 is located inside the fuel tank body. Then the welder performs internal full welding. After the internal full welding is completed, the welder can use an oil-immersed transformer radiator welding slag-removing plug rod, thus avoiding accidents caused by splashed welding slag entering the radiator through the radiator oil pipe during internal full welding.

[0017] It should be understood that: Although the above embodiments have made relatively detailed written descriptions of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. An oil-immersed transformer radiator welding slag removal plug rod, comprising a plug head plate (1), a plug rod (2) and a rubber plug (3). The plug rod (2) is provided on the back of the plug head plate (1). It is characterized in that: The rubber plug (3) is a cylindrical plug, and a circular groove (31) is provided on the back surface of the rubber plug (3). The symmetric center line of the circular groove (31) coincides with the symmetric center line of the cylindrical plug. The plug head plate (1) is a circular plate, and the front surface of the plug head plate (1) is fixedly connected to the inner bottom surface of the circular groove (31). The symmetric center line of the circular groove (31) coincides with the symmetric center line of the plug head plate (1). The symmetric center line of the plug rod (2) coincides with the symmetric center line of the plug head plate (1). The diameter of the rubber plug (3) matches the hole diameter of the heat sink oil pipe to be welded.

2. The slag removal plug rod for welding of an oil-immersed transformer radiator according to claim 1, characterized in that: Multiple annular protrusions (32) are provided on the outer circumferential surface of the rubber plug (3). When the rubber plug (3) is inserted into the hole of the heat sink oil pipe, the annular protrusions (32) achieve interference fit with the hole of the heat sink oil pipe.

3. A slag removal plug rod for welding of an oil-immersed transformer radiator according to claim 1, characterized in that: The rubber plug (3) and the multiple annular protrusions (32) are integrally injection-molded with glue.

4. A slag-removing plug rod for welding of an oil-immersed transformer radiator according to claim 1, characterized in that: The plug head plate (1) is a metal plate, the plug rod (2) is a metal rod, and the metal rod is fixedly welded to the metal plate.

5. A slag removal plug rod for welding of an oil-immersed transformer radiator according to claim 1, characterized in that: The plug head plate (1) is a metal plate, the plug rod (2) is a threaded rod. A connection block (4) is welded to the back surface of the metal plate, and a threaded hole (41) matching the threaded rod is provided on the outer end surface of the connection block (4). The threaded rod is screwed onto the plug head plate (1) through one end of the threaded rod and the threaded hole (41).

6. The slag removal plug rod for welding of an oil-immersed transformer radiator according to claim 5, characterized in that: The connection block (4) is a nut.

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