Transformer bushing tap grounding structure

Abstract

The utility model discloses a transformer bushing tap grounding structure which comprises a grounding flange, the upper end face of the grounding flange is movably connected with a terminal seat, the upper end face of the terminal seat is movably connected with a grounding cover, the outer wall of the grounding cover is provided with two symmetrical telescopic grooves, a guide groove and a limiting groove, and the inner wall of the terminal seat is provided with two symmetrical locking grooves. The terminal base is connected with the grounding cover, the diagonal plane of the locking block is in contact with the edge of the inner wall of the terminal base, the locking block is extruded, the locking block extrudes the first spring, the guide rod is driven to contract towards the interior of the telescopic groove, and the grounding cover is rapidly connected with the terminal base. The locking block is quickly rebounded, the locking of the locking block and the locking groove is realized, the fixation between the terminal seat and the grounding cover is ensured, the movement of the moving block pushes the locking block to move into the contraction groove, the unlocking and dismounting are convenient, the detection by a worker is convenient, and the use flexibility of the end screen grounding structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer bushing end screen grounding structure. Background Art

[0002] The grounding methods of the transformer bushing end screen can be divided into exposed connection type, metal cover enclosed type and normally grounded type. For the normally grounded structure grounding method of the end screen, the protective cover will be opened during the test, and then the grounding sleeve will be pressed down, a metal pin will be inserted into the hole of the lead column, and then the pressed grounding sleeve will be released. The grounding sleeve will rebound under the action of the spring until it reaches the position of the metal pin.

[0003] During the operation of the transformer, grounding operations are required. In order to ensure the normal use of the transformer, staff usually conduct tests at the end screen of the bushing to facilitate the detection of leakage current and insulation conditions of the bushing insulation. However, when detection is required, the grounding cover needs to be opened for operation, and the existing grounding covers are basically connected to the terminal block by screwing. Since the end screen structure is exposed to the external environment for a long time, it is easy to cause rust at the connection and damage to the thread. At the same time, in the process of connecting the grounding cover and the terminal block, due to long-term use, the connection error of the staff may cause the thread at the connection to be worn or damaged by torque, and it cannot be used normally, so the grounding cover cannot be opened normally. Utility Model Content

[0004] The utility model aims to provide a transformer bushing end screen grounding structure, which can make the chamfered surfaces of the two locking blocks contact with the inner wall edge of the terminal seat through the connection between the terminal seat and the grounding cover, so as to squeeze the locking block, so that the locking block squeezes the first spring and shrinks the guide rod into the telescopic groove, so that the grounding cover is quickly connected with the terminal seat, and cooperates with the elasticity of the spring to make the locking block rebound quickly, so as to achieve docking and locking of the locking block and the locking groove, and ensure complete fixation between the terminal seat and the grounding cover, and the movement of the moving block can push the locking block to move into the shrinkage groove, which is convenient for unlocking and disassembling, convenient for staff to detect, and improves the flexibility of the end screen grounding structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a transformer bushing end screen grounding structure, comprising a grounding flange, the upper end surface of the grounding flange is movably connected to a terminal seat, the upper end surface of the terminal seat is movably connected to a grounding cover, the outer wall of the grounding cover is provided with two symmetrical telescopic grooves, a guide groove and a limit groove, the inner wall of the terminal seat is provided with two symmetrical locking grooves, a locking block is clamped in the locking groove, the lower end surface of the locking block is a beveled surface, one side of the locking block is fixedly connected to a guide rod, the outer surface of the guide rod is sleeved with a first spring, the two ends of the first spring are respectively fixedly connected to the locking block and the grounding cover, the side of the locking block away from the guide rod is movably connected to a moving block, and the moving block is located in the locking groove.

[0006] The beneficial effects of the utility model are as follows: through the connection between the terminal seat and the grounding cover, the two locking blocks can be brought into contact with the inner wall of the terminal seat, and the chamfered surface of the lower end surface of the locking block is matched to squeeze the locking block and shrink it into the telescopic groove, and the first spring is squeezed with the guide rod. When the grounding cover is fully connected with the terminal seat, the grounding cover is rotated. When the two locking blocks are rotated to the position of the locking groove, the two first springs rebound quickly, so that the locking blocks are stuck in the corresponding locking grooves, so that the terminal seat and the grounding cover are quickly connected and fixed. The movement of the moving block can assist the locking block to be separated from the locking groove, which is convenient for quick unlocking.

[0007] In order to realize the quick installation and removal between the terminal block and the grounding cover, it is convenient for detection;

[0008] As a further improvement of the above technical solution: two symmetrical movable grooves are provided in the terminal seat, the movable grooves are connected to the locking grooves, a push rod is provided in the movable grooves, the push rod is fixedly connected to the movable block and is slidably connected to the terminal seat, a fixing plate is fixedly connected to the outer wall of the push rod, a second spring is sleeved on the surface of the push rod, two ends of the second spring are respectively fixedly connected to the fixing plate and the terminal seat, and a pressing arc plate is fixedly connected to one end of the push rod away from the moving block.

[0009] The beneficial effect of the present improvement is that, by using the push rod and the second spring, the push rod can drive the moving block to move, so that the fixing plate presses the second spring, and the auxiliary locking block is disengaged from the locking groove, which is convenient for unlocking, and the second spring can reset the moving block, leaving sufficient space for the locking block to dock with the locking groove;

[0010] In order to move the moving block, the auxiliary locking block is disengaged from the locking slot for quick unlocking;

[0011] As a further improvement of the above technical solution: two groups of symmetrical stabilizing grooves are opened on the outer wall of the terminal seat, and a stabilizing rod is slidably connected in the stabilizing groove, and the stabilizing rod is fixedly connected to the pressing arc plate.

[0012] The beneficial effects of this improvement are: by using the stabilizing groove and the stabilizing rod, the pressing arc plate can be stabilized to ensure that the pressing arc plate will not be skewed during the pressing and moving process, and rapid and stable movement can be achieved;

[0013] In order to stabilize and limit the pressing arc plate and ensure smooth movement;

[0014] As a further improvement of the above technical solution: a docking groove is provided on the inner wall of the terminal seat, a sealing groove is provided on the inner bottom wall of the docking groove, a first sealing ring is movably connected in the sealing groove, and the first sealing ring is fixedly connected to the grounding cover.

[0015] The beneficial effects of this improvement are: the terminal block and the grounding cover can be perfectly butted together through the butt joint groove, and the use of the sealing groove and the first sealing ring can ensure the sealing of the internal space and improve the safety during use;

[0016] In order to seal the internal space of the grounding cover, protect the internal structure and improve the safety of use;

[0017] As a further improvement of the above technical solution: a limiting block is slidably connected in the limiting groove, and the limiting block is fixedly connected to the guide rod.

[0018] The beneficial effects of the present improvement are as follows: by using the limiting groove and the limiting groove block, the guide rod and the locking block can be limited, so as to prevent the guide rod from moving beyond the range or falling off with the locking block, thereby improving the stability of the locking block in use and providing sufficient space for the movement of the locking block and the guide rod;

[0019] In order to limit the guide rod and the locking block, ensure the movement while improving the stability and preventing the skewing and falling off;

[0020] As a further improvement of the above technical solution: two symmetrical identification grooves are provided on the upper end surface of the grounding flange, and an identification column is movably connected in the identification groove, and the identification column is fixedly connected to the terminal seat.

[0021] The beneficial effect of this improvement is that by using two identification posts, the identification posts and the identification grooves can be accurately docked, thereby realizing fast and accurate docking between the terminal block and the grounding flange, avoiding misalignment between the terminal block and the grounding flange, and inconvenience in fast fixing;

[0022] In order to achieve quick docking between the terminal block and the grounding flange, fast and accurate fixation;

[0023] As a further improvement of the above technical solution: the terminal seat and the grounding flange are fixed by a plurality of fixing bolts, a card slot is provided on the upper end surface of the grounding flange, a second sealing ring is movably connected to the card slot, and the second sealing ring is fixedly connected to the terminal seat.

[0024] The beneficial effects of this improvement are: by using multiple fixing bolts, the grounding flange and the terminal seat can be better fixed, ensuring the stability of the bushing end screen structure during use, and by using the second sealing ring and the card slot, ensuring the sealing between the terminal seat and the grounding flange;

[0025] In order to fix the terminal base and ensure good sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An isometric structural schematic diagram provided for the utility model;

[0027] Figure 2 A top view provided for the utility model;

[0028] Figure 3 The utility model provides Figure 2 The three-dimensional cross-section view at AA in the middle;

[0029] Figure 4 The utility model provides Figure 3 The enlarged view of point A in the middle;

[0030] Figure 5 The utility model provides Figure 2 A three-dimensional cross-section view at the middle BB;

[0031] Figure 6 The utility model provides Figure 5 Enlarged view of point B in the middle.

[0032] In the figure, 1. grounding flange; 11. terminal seat; 12. grounding cover; 13. telescopic slot; 14. guide slot; 15. limit slot; 16. locking slot; 17. locking block; 18. guide rod; 19. first spring; 20. moving block; 31. movable slot; 32. push rod; 33. fixing plate; 34. second spring; 35. pressing arc plate; 41. stabilizing slot; 42. stabilizing rod; 51. docking slot; 52. sealing slot; 53. first sealing ring; 61. limit block; 71. identification slot; 72. identification column; 81. fixing bolt; 82. card slot; 83. second sealing ring. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0034] like Figures 1 to 6As shown, a transformer bushing end screen grounding structure provided by an embodiment of the utility model comprises a grounding flange 1, the upper end surface of the grounding flange 1 is movably connected with a terminal seat 11, the upper end surface of the terminal seat 11 is movably connected with a grounding cover 12, and the structure inside the bushing end screen grounding framework can be protected by the connection between the grounding cover 12 and the terminal seat 11, and the outer wall of the grounding cover 12 is provided with two symmetrical telescopic grooves 13, a guide groove 14 and a limit groove 15, and the inner wall of the terminal seat 11 is provided with two symmetrical locking grooves 16, and a locking block 17 is clamped in the locking groove 16, and is fixed by the locking groove 16 and the locking block 17, so that the grounding cover 12 and the terminal seat 11 are well fixed, and the lower end surface of the locking block 17 is a beveled surface, and one side of the locking block 17 is provided A guide rod 18 is fixedly connected, and a first spring 19 is sleeved on the outer surface of the guide rod 18. The two ends of the first spring 19 are fixedly connected to the locking block 17 and the grounding cover 12 respectively. When the chamfered surfaces of the two locking blocks 17 contact the inner wall edges of the terminal seat 11, the locking blocks 17 will be squeezed, so that the two locking blocks 17 move with their corresponding guide rods 18, and the first spring 19 is squeezed to achieve rapid docking between the locking blocks 17 and the locking groove 16. The side of the locking block 17 away from the guide rod 18 is movably connected with a moving block 20, and the moving block 20 is located in the locking groove 16. The movement of the moving block 20 can assist the locking block 17 to disengage from the locking groove 16. Two symmetrical movable grooves 31 are provided in the terminal seat 11. The movable groove 31 is connected to the locking groove 16, and the movable groove 31 is in communication with the locking groove 16. A push rod 32 is provided, which is fixedly connected to the moving block 20 and slidably connected to the terminal seat 11. A fixing piece 33 is fixedly connected to the outer wall of the push rod 32. A second spring 34 is sleeved on the surface of the push rod 32. Both ends of the second spring 34 are fixedly connected to the fixing piece 33 and the terminal seat 11 respectively. A pressing arc plate 35 is fixedly connected to the end of the push rod 32 away from the moving block 20. Through the action of the pressing arc plate 35, the two pressing arc plates 35 move toward the center with their corresponding push rods 32 at the same time. The movement of the moving block 20 is controlled by the push rod 32. During the movement, the fixing piece 33 on the outer wall of the push rod 32 will squeeze the second spring 34, and the moving block 20 will disengage from the locking groove 16 against the locking block 17, which can facilitate the rapid opening of the grounding cover 12 and facilitate its inspection. Two groups of symmetrical stabilizing grooves 41 are provided on the outer wall of the terminal seat 11, and a stabilizing rod 42 is slidably connected in the stabilizing groove 41, and the stabilizing rod 42 is fixedly connected to the pressing arc plate 35. The use of the two groups of stabilizing grooves 41 and the two groups of stabilizing rods 42 can limit and stabilize the corresponding pressing arc plates 35 to prevent skewing. A docking groove 51 is provided on the inner wall of the terminal seat 11, and a sealing groove 52 is provided on the inner bottom wall of the docking groove 51. A first sealing ring 53 is movably connected in the sealing groove 52, and the first sealing ring 53 is fixedly connected to the grounding cover 12. The coordinated use of the sealing groove 52 and the first sealing ring 53 can achieve the sealing of the connection between the grounding cover 12 and the terminal seat 11, and the internal structure is well protected. A limiting block 61 is slidably connected in the limiting groove 15.The limit block 61 is fixedly connected to the guide rod 18. By using the two limit blocks 61, the corresponding guide rods 18 can be limited, thereby ensuring the stability of the locking block 17. Two symmetrical identification grooves 71 are provided on the upper end surface of the grounding flange 1. An identification column 72 is movably connected in the identification groove 71. The identification column 72 is fixedly connected to the terminal seat 11. The cooperation between the two identification grooves 71 and the two identification columns 72 can ensure the accurate docking between the grounding flange 1 and the terminal seat 11. The terminal seat 11 and the grounding flange 1 are fixed by multiple fixing bolts 81. The grounding flange 1 and the terminal seat 11 are well fixed by four fixing bolts 81. A card slot 82 is provided on the upper end surface of the grounding flange 1. The card slot 82 is movably connected to the second sealing ring 83. The cooperation between the card slot 82 and the second sealing ring 83 can ensure the sealing of the connection between the grounding flange 1 and the terminal seat 11.

[0035] The working principle and use process of the utility model are as follows: when in use, first, the two identification columns 72 on the end face of the terminal seat 11 are docked with the two identification grooves 71 on the grounding flange 1. When the identification columns 72 and the identification grooves 71 are docked, the second sealing ring 83 is just engaged with the card groove 82. At this time, the terminal seat 11 can be fixed to the grounding flange 1 by four fixing bolts 81. Then, the grounding cover 12 is docked with the docking groove 51 on the terminal seat 11. During the docking process, the chamfered surfaces of the lower end faces of the two locking blocks 17 will be squeezed by the edges of the inner walls of the terminal seat 11, so that the locking blocks 17 move toward the center along with the guide rod 18 and the limit block 61, so that the locking blocks 17 shrink in the telescopic groove 13, squeezing the first spring 19. When the grounding cover 12 is completely engaged with the terminal seat 11 After completion, rotate it. When the two locking blocks 17 are rotated to the position of the corresponding locking grooves 16, the two first springs 19 rebound quickly, so that the corresponding locking blocks 17 are stuck in the locking grooves 16, and the grounding cover 12 and the terminal seat 11 are locked. At this time, the first sealing ring 53 and the sealing groove 52 are just docked and sealed. When inspection is required, the staff can press the two pressing arc plates 35 at the same time to move the pressing arc plates 35 with the moving block 20 at one end of the push rod 32. At the same time, the fixing plate 33 on the push rod 32 compresses the second spring 34, and the push rod 32 pushes the locking block 17 to disengage from the locking groove 16, and then the grounding cover 12 is removed, the two pressing arc plates 35 are loosened, and the two second springs 34 rebound to reset, thereby realizing the use process of the entire pipe sleeve end screen grounding structure.

[0036] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transformer bushing end screen grounding structure, comprising a grounding flange (1), characterized in that: The upper end surface of the grounding flange (1) is movably connected to a terminal seat (11), and the upper end surface of the terminal seat (11) is movably connected to a grounding cover (12), and the outer wall of the grounding cover (12) is provided with two symmetrical telescopic slots (13), a guide slot (14) and a limit slot (15), and the inner wall of the terminal seat (11) is provided with two symmetrical locking slots (16); A locking block (17) is clamped in the locking groove (16), the lower end surface of the locking block (17) is a beveled surface, one side of the locking block (17) is fixedly connected to a guide rod (18), the outer surface of the guide rod (18) is sleeved with a first spring (19), the two ends of the first spring (19) are respectively fixedly connected to the locking block (17) and the grounding cover (12), and the side of the locking block (17) away from the guide rod (18) is movably connected to a moving block (20), and the moving block (20) is located in the locking groove (16).

2. The transformer bushing end shield grounding structure according to claim 1, characterized in that: Two symmetrical movable grooves (31) are provided in the terminal seat (11), the movable grooves (31) are communicated with the locking grooves (16), a push rod (32) is provided in the movable grooves (31), the push rod (32) is fixedly connected to the moving block (20) and is slidably connected to the terminal seat (11), a fixing plate (33) is fixedly connected to the outer wall of the push rod (32), a second spring (34) is sleeved on the surface of the push rod (32), two ends of the second spring (34) are fixedly connected to the fixing plate (33) and the terminal seat (11), respectively, and a pressing arc plate (35) is fixedly connected to one end of the push rod (32) away from the moving block (20).

3. The transformer bushing end shield grounding structure according to claim 2, characterized in that: Two groups of symmetrical stabilizing grooves (41) are provided on the outer wall of the terminal seat (11), a stabilizing rod (42) is slidably connected in the stabilizing groove (41), and the stabilizing rod (42) is fixedly connected to the pressing arc plate (35).

4. The transformer bushing end shield grounding structure according to claim 1, characterized in that: A docking groove (51) is provided on the inner wall of the terminal seat (11), a sealing groove (52) is provided on the inner bottom wall of the docking groove (51), a first sealing ring (53) is movably connected in the sealing groove (52), and the first sealing ring (53) is fixedly connected to the grounding cover (12).

5. The transformer bushing end shield grounding structure according to claim 1, characterized in that: A limiting block (61) is slidably connected in the limiting groove (15), and the limiting block (61) is fixedly connected to the guide rod (18).

6. The transformer bushing end shield grounding structure according to claim 1, characterized in that: The upper end surface of the grounding flange (1) is provided with two symmetrical identification grooves (71), an identification column (72) is movably connected in the identification groove (71), and the identification column (72) is fixedly connected to the terminal seat (11).

7. The transformer bushing end shield grounding structure according to claim 1, characterized in that: The terminal seat (11) and the grounding flange (1) are fixed by a plurality of fixing bolts (81); a slot (82) is provided on the upper end surface of the grounding flange (1); a second sealing ring (83) is movably connected to the slot (82); and the second sealing ring (83) is fixedly connected to the terminal seat (11).

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