220kV guide rod type sleeve ascending flanged base

Abstract

The utility model discloses a 220kV guide rod type casing pipe ascending flanged base, which relates to the technical field of casing pipe ascending flanged bases, and comprises an ascending flanged base, an operation port is arranged on the ascending flanged base, an insulating cylinder is arranged in the ascending flanged base, an opening used for facilitating internal operation is arranged on the insulating cylinder, and the position of the opening corresponds to the position of the operation port. According to the sleeve ascending flanged base, the openable and closable forming insulating cylinder is arranged in the ascending flanged base, so that the inner diameter of the sleeve ascending flanged base is reduced, the steel consumption of the ascending flanged base and the use amount of transformer insulating oil are reduced, the cost is reduced, the insulation margin of the ascending flanged base is improved, and the product safety is also improved; the ascending flanged base with the structure is simple in manufacturing process and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing raising seats, in particular to a 220kV guide rod type bushing raising seat. Background Art

[0002] When a 220kV oil-immersed transformer uses a guide rod bushing, a terminal block is installed at the bottom of the bushing. After the bushing is installed on the riser, it must be connected to the transformer high-voltage lead through a hand hole. Setting a molded paper tube will block the installation hand hole and make it impossible to operate. If an insulating tube is added to the equalizing ball, it will affect the disassembly and assembly of the equalizing ball.

[0003] The commonly used structure at present is as follows, including a lifting seat, an operating port is provided on the lifting seat, a mounting flange is provided at the lower end of the lifting seat, the high-voltage main lead of the transformer passes through the mounting flange to the inside of the lifting seat, a cover flange is provided at the upper end of the lifting seat, a current transformer is provided in the lifting seat below the cover flange, a high-voltage bushing is fixedly installed on the cover flange, one end of the high-voltage bushing passes through the cover flange and the current transformer to the inside of the lifting seat and is connected to the high-voltage main lead of the transformer, and the equalizing ball is installed. The operating port is convenient for connecting the leads and installing the equalizing ball after the high-voltage bushing is installed in place, and finally a sealing cover is fixed on the operating port.

[0004] This structure is easy to install and operate, but there is no insulating cylinder inside the lifting seat, so the inner diameter of the lifting seat is larger than that of the original cable-through casing lifting seat, the lifting seat is difficult to process, and consumes more steel. At the same time, because the size of the lifting seat is larger, the amount of transformer insulating oil is also more. In general, the lifting seat using this structure is difficult to manufacture, the cost is high, and the safety is poor. Utility Model Content

[0005] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a 220kV guide rod type bushing riser, which reduces the inner diameter of the bushing riser by arranging an openable and closable molded insulating cylinder inside the riser, reduces the steel consumption of the riser and the amount of transformer insulating oil, reduces the cost, and improves the insulation margin of the riser. The product safety is also improved. The production process of the riser with this structure is simple and easy to operate.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A 220kV guide rod type bushing lifting seat comprises a lifting seat, an operating port is provided on the lifting seat, an insulating cylinder is provided inside the lifting seat, an opening is provided on the insulating cylinder for facilitating internal operation, the position of the opening corresponds to the position of the operating port, and a sealing plate is provided at the opening for closing the opening.

[0008] Through the above scheme, the operating port on the lifting seat and the opening on the insulating cylinder can be used to facilitate the installation or maintenance of the equalizing ball and the lead inside the insulating cylinder, reduce the inner diameter of the bushing lifting seat, reduce the steel consumption of the lifting seat and the amount of transformer insulating oil, reduce costs, and improve the insulation margin of the lifting seat.

[0009] Furthermore, the size of the sealing plate is larger than the opening, and the size of the sealing plate is smaller than the operating port.

[0010] Through the above further scheme, the sealing plate can enter into the lifting seat from the operating port and cover the opening on the insulating tube, so that the inside of the insulating tube is sealed to form a complete insulating tube, separating the voltage equalizing ball and the lead from the inner wall of the lifting seat, thereby improving the insulation margin of the lifting seat.

[0011] Furthermore, a sealing cover plate is provided on the operation port.

[0012] Through the above further solution, the interior of the lifting seat can be sealed to prevent foreign objects from entering, thereby increasing safety.

[0013] Furthermore, the sealing cover plate is provided with a fixing mechanism for connecting with the sealing plate.

[0014] Through the above further solution, the sealing cover plate and the sealing plate can be integrated into one by the fixing mechanism, and when the sealing cover plate is disassembled or installed, the sealing plate can be directly disassembled or installed.

[0015] Furthermore, the fixing mechanism includes a nut, a bolt and a support tube. The nut is fixedly mounted on the inner side of the sealing cover plate. The bolt passes through the sealing plate and is threadedly connected to the nut. A support tube is sleeved on the bolt and the support tube is located between the sealing plate and the sealing cover plate.

[0016] Through the above further scheme, the sealing plate can be fixed on the sealing cover plate through the cooperation of bolts, nuts and support tubes to make them one body. The length of the support tube is adapted to the length of the bolts, so that the sealing plate can be fixed to prevent the sealing plate from tilting or rotating forward and backward.

[0017] Furthermore, the sealing plate is arc-shaped, and the sealing plate fits in an opening provided on the insulating tube.

[0018] Through the above further solution, the inner arc of the sealing plate is the same as the outer arc of the insulating tube, so that the sealing plate and the opening of the insulating tube are fitted together, so that the sealing plate can seal the opening of the insulating tube.

[0019] Furthermore, the bolts and the support tube are both made of insulating material.

[0020] Through the above further solution, the insulation margin of the insulation cylinder can be enhanced.

[0021] The beneficial effects of the utility model are:

[0022] 1. An insulating cylinder is set inside the lifting seat to reduce the inner diameter of the casing lifting seat, reduce the consumption of steel for the lifting seat and the amount of transformer insulating oil, reduce costs, and improve the insulation margin of the lifting seat;

[0023] 2. An opening is provided on the insulating cylinder, which can facilitate the installation or maintenance of the voltage-equalizing ball and lead wire inside the insulating cylinder through the operating port on the lifting seat and the opening on the insulating cylinder;

[0024] 3. The sealing cover plate on the operating port and the sealing plate at the opening are fixedly connected through a fixing mechanism to form a whole. When the sealing cover plate is installed, the sealing plate seals the opening on the insulating cylinder, so that the insulating cylinder in the lifting seat forms a complete closed insulating environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0026] Figure 1 It is a schematic diagram of the overall structure of the background technology in the utility model;

[0027] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0028] In the figure: 1. lifting seat; 11. operation port; 111. sealing cover plate; 12. mounting flange; 13. cover flange; 14. current transformer; 15. high-voltage bushing; 16. transformer high-voltage main lead; 17. equalizing ball; 2. insulating cylinder; 21. opening; 211. sealing plate; 3. fixing mechanism; 31. nut; 32. bolt; 33. support tube. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Reference Figure 1 As shown, the guide rod type bushing lifting seat structure in the prior art includes a lifting seat 1, an operating port 11 is provided on the lifting seat 1, a mounting flange 12 is provided at the lower end of the lifting seat 1, the high-voltage main lead 16 of the transformer passes through the mounting flange 12 to the inside of the lifting seat 1, a cover flange 13 is provided at the upper end of the lifting seat 1, a current transformer 14 is provided in the lifting seat 1 below the cover flange 13, a high-voltage bushing 15 is fixedly installed on the cover flange 13, one end of the high-voltage bushing 15 passes through the cover flange 13 and the current transformer 14 to the inside of the lifting seat 1 and is connected to the high-voltage main lead 16 of the transformer, and the equalizing ball 17 is installed, the operating port 11 facilitates the high-voltage bushing 15 to be connected to the high-voltage main lead 16 of the transformer after it is installed in place, and the equalizing ball 17 is installed, and finally a sealing cover plate 111 is fixed on the operating port 11.

[0033] See also Figure 2As shown, the preferred embodiment of the utility model discloses a 220kV guide rod type bushing elevating seat, including an elevating seat 1, an operating port 11 is provided on the elevating seat 1, a mounting flange 12 is provided at the lower end of the elevating seat 1, the transformer high voltage main lead 16 passes through the mounting flange 12 to the inside of the elevating seat 1, a cover flange 13 is provided at the upper end of the elevating seat 1, a current transformer 14 is provided in the elevating seat 1 below the cover flange 13, a high voltage bushing 15 is fixedly installed on the cover flange 13, one end of which passes through the cover flange 13 and The current transformer 14 is connected to the high-voltage main lead 16 of the transformer inside the lifting seat 1, and the voltage-equalizing ball 17 is installed. An insulating cylinder 2 is fixedly installed on the inner wall of the lifting seat 1, which can reduce the inner diameter of the lifting seat 1, reduce the steel consumption of the lifting seat 1 and the amount of transformer insulating oil, reduce costs, and improve the insulation margin of the lifting seat 1. An opening 21 is provided on the insulating cylinder 2. The position of the opening 21 corresponds to the position of the operating port 11. The size of the opening 21 is smaller than the size of the operating port 11, and can be passed through the operating port 11 on the lifting seat 1. The opening 21 on the insulating cylinder 2 is convenient for installing or repairing the equalizing ball 17 and the lead wire inside the insulating cylinder 2. The opening 21 is provided with a sealing plate 211 for closing the opening 21. The size of the sealing plate 211 is larger than the opening 21, and the size of the sealing plate 211 is smaller than the operation port 11. The sealing plate 211 can enter the lifting seat 1 from the operation port 11 and can cover the opening 21 on the insulating cylinder 2, so that the inside of the insulating cylinder 2 is sealed to form a complete insulating cylinder 2, and the equalizing ball 17 and the lead wire are connected to the lifting seat 1. The wall is separated to improve the insulation margin of the lifting seat 1. The operating port 11 is provided with a sealing cover 111, which can seal the inside of the lifting seat 1 to prevent foreign objects from entering and increase safety. The sealing cover 111 is provided with a fixing mechanism 3 for connecting with the sealing plate 211, and the sealing cover 111 and the sealing plate 211 can be integrated into one through the fixing mechanism 3. When the sealing cover 111 is installed, the sealing plate 211 blocks the opening 21 on the insulating tube 2, so that the insulating tube 2 in the lifting seat 1 forms a complete closed insulating environment.

[0034] Among them, the fixing mechanism 3 includes a nut 31, a bolt 32 and a support tube 33. The nut 31 is welded on the inner side of the sealing cover plate 111. The bolt 32 passes through the sealing plate 211 and is threadedly connected to the nut 31. The bolt 32 is sleeved with a support tube 33. The support tube 33 is located between the sealing plate 211 and the sealing cover plate 111. The sealing plate 211 can be fixed to the sealing cover plate 111 through the cooperation of the bolt 32, the nut 31 and the support tube 33 to make them become one. The length of the support tube 33 is adapted to the length of the bolt 32, so that the sealing plate 211 can be fixed to prevent the sealing plate 211 from tilting or rotating forward and backward.

[0035] The sealing plate 211 is arc-shaped, and fits with the opening 21 of the insulating tube 2. The inner curvature of the sealing plate 211 is the same as the outer curvature of the insulating tube 2, so that the sealing plate 211 fits with the opening 21 of the insulating tube 2, so that the sealing plate 211 can seal the opening 21 of the insulating tube 2.

[0036] The bolt 32 and the support tube 33 are both made of phenolic resin, which has excellent insulation performance, high wear resistance and high strength, and also has high hardness and good impact resistance.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A 220 kV guide rod type bushing elevating seat, comprising an elevating seat (1), wherein the elevating seat (1) is provided with an operating port (11), characterized in that: An insulating cylinder (2) is provided inside the lifting seat (1), and an opening (21) is provided on the insulating cylinder (2) for facilitating internal operation. The position of the opening (21) corresponds to the position of the operating port (11), and a sealing plate (211) is provided at the opening (21) for closing the opening (21).

2. A 220kV guide rod type bushing riser according to claim 1, characterized in that: The size of the sealing plate (211) is larger than the opening (21), and the size of the sealing plate (211) is smaller than the operating port (11).

3. The 220kV guide rod type bushing riser according to claim 1, characterized in that: A sealing cover plate (111) is provided on the operating port (11).

4. A 220kV guide rod type bushing riser according to claim 3, characterized in that: The sealing cover plate (111) is provided with a fixing mechanism (3) for connecting with the sealing plate (211).

5. A 220kV guide rod type bushing riser according to claim 4, characterized in that: The fastening mechanism (3) comprises a nut (31), a bolt (32) and a support tube (33); the nut (31) is fixedly mounted on the inner side of the sealing cover plate (111); the bolt (32) penetrates the sealing plate (211) and is threadedly connected to the nut (31); the bolt (32) is sleeved with a support tube (33); and the support tube (33) is located between the sealing plate (211) and the sealing cover plate (111).

6. The 220kV guide rod type bushing riser according to claim 1, characterized in that: The sealing plate (211) is arc-shaped, and fits in place with the insulating tube (2) where the opening (21) is provided.

7. The 220kV guide rod type bushing riser according to claim 5, characterized in that: The bolt (32) and the support tube (33) are both made of insulating material.

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