Ground wire access protection device for switching operation of transformer substation

Abstract

The invention discloses a ground wire access protection device for switching operation of a transformer substation, and relates to the technical field of electric power safety, the ground wire access protection device comprises a rack, a rotating shaft is rotatably mounted at the top of the rack, a rotating wheel is mounted at the bottom end of the rotating shaft, a sliding block is arranged at the side part of a side plate, a vertical plate is arranged at the side part of the sliding block, and a force transmission block is fixedly connected to the bottom end of the vertical plate; a first transverse plate, a second transverse plate and a third transverse plate are fixedly mounted in the rack, a clamping ring is arranged on the upper surface of the third transverse plate, and a clamping block clamped with the clamping ring is fixedly mounted at the bottom of the force transmission block; a wire inserting column is fixedly installed in the fourth transverse plate, the bottom of the first transverse plate is fixedly provided with a wire inserting column, the side portion of the wire inserting column is provided with a wire connected with a circuit on the wire outlet side of the transformer substation, and the wire inserting column can be electrically connected with the wiring cylinder in an inserted mode. According to the invention, when the switching of the transformer substation is disconnected, the line is automatically connected with the ground wire, the electric shock risk of operation and maintenance personnel can be effectively reduced, the equipment line maintenance operation is ensured to be in a safe environment, and the safety of the operation and maintenance personnel and power transformation equipment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power safety, and in particular discloses a ground wire access protection device for switching operations in a transformer substation. Background Art

[0002] Substation switching refers to a series of operations that transform a substation from one state to another. Specifically, switching operations involve changing substation equipment from one operational state (such as operation, hot standby, cold standby, or maintenance) to another. This process typically involves operating disconnectors and circuit breakers, as well as installing and removing ground wires. During substation switching operations, installing and removing ground wires carries a high risk. According to power safety operating procedures, during maintenance of power equipment or lines, safety precautions must be implemented in the following order: power outage, electrical testing, and installing ground wires.

[0003] The traditional operating method in open substations is for operators to wear insulating gloves and use a telescopic tester to test the power. After the test, they hold the operating rod with the grounding wire to complete the grounding of the power outage line. Usually, the operating rod used for the grounding wire is a telescopic rod. Before disconnecting the circuit, the operator extends the operating rod and connects the ground wire. After the grounding is completed, the operator can perform the switching and power testing operations. At present, due to the complex lines in the substation and the large number of operation procedures for the operator, some operators are prone to missing the ground wire or hanging the wrong ground wire in the early stages of work. Once such a situation occurs, it will cause a high risk of electric shock to the operator and cause irreparable losses. Summary of the Invention

[0004] In view of the high risk of electric shock during the equipment and line maintenance of substations by power grid operation and maintenance personnel, the present invention provides a ground wire access protection device for substation switching operations.

[0005] To solve the above problems, the present invention provides the following technical solutions: The top of the platform is fixed with a rotating shaft, and the top of the rotating shaft is provided with a cross bar, and the cross bar cooperates with the substation switching transmission. The bottom end of the rotating shaft is fixedly installed with a rotating wheel, and the inside of the platform is fixedly installed with a side plate, and the side of the side plate is provided with a vertical sliding slider, and the slider cooperates with the rotating wheel through a hinged rod. The side of the slider is fixedly provided with a vertical plate, and the bottom end of the vertical plate is fastened with a force transmission block; the inside of the platform is fixedly installed with a first cross plate, and the upper part of the first cross plate is fixedly installed with a second cross plate, and the A third horizontal plate that moves vertically is provided above the second horizontal plate, and the first, second and third horizontal plates are all arranged below the side plates. A clamping ring is provided on the upper surface of the third horizontal plate, and a clamping block that is clamped with the clamping ring is fixedly installed on the bottom of the force transmission block; a fourth horizontal plate that is tightly connected to the stand is provided below the first horizontal plate, and a wiring barrel connected to the ground wire is fixedly installed in the fourth horizontal plate, and the bottom of the wiring barrel is connected to the ground wire. A plug-in post is fixedly provided at the bottom of the first horizontal plate, and a wire connected to the circuit on the outgoing line side of the substation is provided on the side of the plug-in post, and the plug-in post can be electrically plugged into the wiring barrel.

[0006] Preferably, a support plate is fixedly installed on the top of the stand, the rotating shaft is rotatably matched with the support plate, a rubber sleeve is fixedly mounted on the top outer wall of the rotating shaft, the cross bar is tightly connected to the rubber sleeve, and a rubber strip is fixedly mounted on the end outer wall of the cross bar, and the rubber strip can contact the side wall of the substation switch.

[0007] Preferably, a fifth horizontal plate is fixedly installed on the side of the side plate, the rotating shaft is rotatably matched with the fifth horizontal plate, the rotating wheel is arranged below the fifth horizontal plate, and a first connecting column is fixedly installed on the bottom end face of the rotating wheel, the bottom end of the first connecting column is hinged to the second connecting column through a pin shaft, the second connecting column is fastened to the top end of the hinged rod, the bottom end of the hinged rod is provided with a ball protrusion, and the top of the slider is provided with a circular groove that slides with the outer wall of the ball protrusion.

[0008] Preferably, a guide rail is fixedly mounted on the side of the side panel, and a groove is provided in the sliding block for sliding engagement with the guide rail.

[0009] Preferably, the side of the slider is fixedly connected to a receiving block, and a plurality of sliding rods that slide together are provided in the receiving block. The length of the sliding rod is greater than the length of the receiving block. The top and bottom of the sliding rod are fixedly sleeved with a sleeve plate, and the sleeve plate is fastened to the vertical plate. A limiting column is fixedly installed in the sleeve plate, and the inner end face of the limiting column can conflict with the receiving block.

[0010] Preferably, a holder is fixedly mounted on the upper surface of the third transverse plate, the holder is an internal hollow structure, the clamping ring is fastened on top of the holder, and the height of the holder is smaller than the height of the clamping block.

[0011] Preferably, a support column is fixedly installed on the first horizontal plate, and the support column is tightly connected to the second horizontal plate. A sliding sleeve is fixedly installed in the second horizontal plate. A plurality of first sliding rods that slide in cooperation with the sliding sleeve are fixedly installed on the bottom of the third horizontal plate. A through hole is opened on the first horizontal plate to facilitate the passage of the first sliding rod, and the through hole is arranged on the outside of the support column.

[0012] Preferably, a hydraulic cylinder is fixedly mounted on the second transverse plate, a hydraulic rod of the hydraulic cylinder is arranged vertically upward, a lifting block is fixedly mounted on the hydraulic rod of the hydraulic cylinder, and the lifting block is tightly connected to the bottom of the third transverse plate.

[0013] Preferably, a second slide rod is fixedly installed at the bottom of the second horizontal plate, a support is fixedly installed at the bottom of the first horizontal plate, the second slide rod slides with the first horizontal plate and the support, the bottom end of the second slide rod is fastened to the top of the wire plug post, and a limiting nut is mounted on the top of the wire plug post.

[0014] Preferably, a compression spring is mounted on the outer wall of the second slide bar, the top end of the compression spring is fastened to the bottom of the second transverse plate, and the bottom end of the compression spring is fastened to the top of the first transverse plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The cross bar in the present invention can be driven by the switching of the substation, so that the rotating shaft drives the rotating wheel to rotate. By setting the matching structure of the slider and the hinged rod, the slider can slide vertically along the side of the vertical plate, so that the clamping block at the bottom of the force transmission block is clamped with the clamping ring, thereby reducing the distance between the first cross plate and the fourth cross plate, and making the plug-in post and the terminal barrel electrically plugged in, thereby connecting the substation outgoing line side circuit with the grounding wire, so that the substation equipment line is in a safe protection state, and the operation and maintenance personnel can carry out equipment maintenance operations; the present invention can automatically connect its line with the ground wire when the substation switching is disconnected, which can effectively reduce the risk of electric shock for the operation and maintenance personnel, ensure that the equipment line maintenance operation is in a safe environment, and protect the safety of the operation and maintenance personnel and the substation equipment, so it has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts. Figure 1 It is a schematic diagram of the overall structure of the device of the present invention; Figure 2 Schematic diagram of the runner structure of the present invention; Figure 3 This is a schematic diagram of the hinge rod installation structure of the present invention; Figure 4 This is a schematic diagram of the installation structure of the receiving block of the present invention; Figure 5 This is a schematic diagram of the first slide bar installation structure of the present invention; Figure 6 This is a schematic diagram of the installation structure of the compression spring of the present invention; In the figure: 1. Stand, 2. Rotating shaft, 3. Crossbar, 4. Rotating wheel, 5. Side plate, 6. Slider, 7. Articulated rod, 8. Vertical plate, 9. Force transmission block, 10. First crossbar, 11. Second crossbar, 12. Third crossbar, 13. Snap ring, 14. Block, 15. Fourth crossbar, 16. Wire barrel, 17. Plug-in column, 18. Wire, 19. Support plate, 20. Rubber sleeve, 21. Rubber strip, 22. Fifth crossbar , 23. First connecting column, 24. Second connecting column, 25. Ball protrusion, 26. Circular groove, 27. Guide rail, 28. Compression spring, 29. Receiver block, 30. Slide rod, 31. Bushing, 32. Limit column, 33. Card seat, 34. Support column, 35. Slide sleeve, 36. First slide rod, 37. Through hole, 38. Hydraulic cylinder, 39. Lifting block, 40. Second slide rod, 41. Support, 42. Limit nut. DETAILED DESCRIPTION

[0017] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0018] This specific embodiment provides a ground line access protection device for substation switching operation, such as Figures 1-6As shown; it includes a stand 1, the bottom of which is fixedly mounted with a plurality of footings, all of which are made of insulating material, the top of which is fixedly mounted with a support plate 19, a rotating shaft 2 is provided in the support plate 19, the top end of the rotating shaft 2 is arranged above the stand 1, and the bottom end of the rotating shaft 2 is arranged inside the stand 1. A rubber sleeve 20 is fixedly sleeved on the outer wall of the top end of the rotating shaft 2, and a crossbar 3 is tightly connected to the rubber sleeve 20. The crossbar 3 is arranged perpendicular to the rotating shaft 2, and a rubber strip 21 is fixedly sleeved on the outer wall of the end of the crossbar 3. The rubber strip 21 can contact the side wall of the substation switch, and the rubber strip 21 can be driven by the switch to rotate the rotating shaft 2.

[0019] A rotating wheel 4 is fixedly installed at the bottom end of the rotating shaft 2, and a side panel 5 is fixedly installed inside the platform 1, and the side panel 5 is arranged on the outside of the rotating wheel 4; a fifth transverse plate 22 is fixedly installed on the side of the side panel 5, and the outer wall of the rotating shaft 2 is rotatably matched with the fifth transverse plate 22, and the rotating wheel 4 is arranged below the fifth transverse plate 22, and a first connecting column 23 is fixedly installed on the bottom end face of the rotating wheel 4, and the bottom end of the first connecting column 23 is hinged to the second connecting column 24 through a pin shaft, and when the rotating wheel 4 rotates, it can drive the first connecting column 23 and the second connecting column 24 to rotate together, and the second connecting column 24 is fastened to the top end of the hinged rod 7, and the bottom end of the hinged rod 7 is provided with a ball protrusion 25.

[0020] A guide rail 27 is fixedly mounted on the side of the side panel 5, positioned below the fifth crossbar 22. A groove is defined within the slider 6, which slidably engages with the guide rail 27. A circular groove 26 is provided at the top of the slider 6, which slidably engages with the outer wall of the spherical protrusion 25. When the rotating wheel 4 rotates and the first and second connecting posts 23 and 24 move away from the slider 6, the slider 6 can move vertically upward along the guide rail 27. By driving the rotating wheel 4 via the rotating shaft 2, the slider 6 can be driven vertically upward or downward along the guide rail 27 by the hinged rod 7, thereby adjusting the position of the slider 6.

[0021] The side of the slider 6 is fixedly connected to a receiving block 29. The receiving block 29 is provided with a plurality of evenly distributed through slots. A slide rod 30 is slidably mounted in the through slots. The slide rod 30 slidably cooperates with the receiving block 29. The length of the slide rod 30 is greater than that of the receiving block 29. The top and bottom of the slide rod 30 are fixedly fitted with a sleeve 31. The sleeve 31 is tightly connected to the vertical plate 8. The bottom end of the vertical plate 8 is tightly connected to the force transmission block 9. A limit column 32 is fixedly mounted in the sleeve 31. The inner end surface of the limit column 32 can interfere with the receiving block 29. By providing a matching structure between the receiving block 29 and the slide rod 30, the receiving block 29 can have a clearance space for vertical sliding, which can effectively avoid stress concentration.

[0022] A first transverse plate 10 is fixedly installed inside the platform 1, a second transverse plate 11 is fixedly installed above the first transverse plate 10, and a vertically movable third transverse plate 12 is provided above the second transverse plate 11. The first transverse plate 10, the second transverse plate 11 and the third transverse plate 12 are all arranged below the side plate 5.

[0023] A holder 33 is fixedly mounted on the upper surface of the third transverse plate 12 . The holder 33 is a hollow structure. The clamping ring 13 is fastened above the holder 33 . The height of the holder 33 is smaller than that of the clamping block 14 .

[0024] A clamping ring 13 is provided on the upper surface of the third horizontal plate 12, and a clamping block 14 engaged with the clamping ring 13 is fixedly installed on the bottom of the force transmission block 9; a fourth horizontal plate 15 tightly connected to the stand 1 is provided below the first horizontal plate 10, and a terminal barrel 16 connected to the ground wire is fixedly installed in the fourth horizontal plate 15, and the bottom of the terminal barrel 16 is connected to the ground wire. A plug-in post 17 is fixedly provided at the bottom of the first horizontal plate 10, and a wire 18 connected to the outgoing line circuit of the substation is provided on the side of the plug-in post 17, and the plug-in post 17 can be electrically plugged into the terminal barrel 16.

[0025] Among them, a support column 34 is fixedly installed on the first horizontal plate 10, and the support column 34 is tightly connected to the second horizontal plate 11. A plurality of sliding sleeves 35 are fixedly installed in the second horizontal plate 11, and the sliding sleeves 35 are evenly arranged at the four corners of the outer side of the support column 34. A plurality of first sliding rods 36 that slide with the sliding sleeves 35 are fixedly installed at the bottom of the third horizontal plate 12. A through hole 37 is opened on the first horizontal plate 10 to facilitate the passage of the first sliding rod 36, and the through hole 37 is arranged on the outer side of the support column 34.

[0026] Among them, a second slide rod 40 is fixedly installed at the bottom of the second horizontal plate 11, and a support 41 is fixedly installed at the bottom of the first horizontal plate 10. The second slide rod 40 slides with the first horizontal plate 10 and the support 41. The bottom end of the second slide rod 40 is fastened to the top of the wire plug-in column 17, and the top of the wire plug-in column 17 is fitted with a limiting nut 42.

[0027] In addition, a compression spring 28 is mounted on the outer wall of the second slide bar 40 . The top end of the compression spring 28 is fastened to the bottom of the second transverse plate 11 , and the bottom end of the compression spring 28 is fastened to the top of the first transverse plate 10 .

[0028] The working principle of the present invention is: Before the maintenance personnel carry out maintenance on the substation equipment line, they can place the stand 1 of the device under the switch so that the rubber strip 21 contacts the outer side of the switch on one side; after the substation switch is disconnected, the rubber strip 21 is subjected to the outward force exerted by the switch, so that the cross bar 3 drives the shaft 2 to rotate, thereby rotating the wheel 4. Under the rotation of the wheel 4, the force transmitted by the hinged rod 7 causes the slider 6 to slide vertically downward along the guide rail 27, thereby driving the receiving block 29 and the vertical plate 8 to slide vertically downward, and inserting the clamping block 14 into the clamping ring 13; since the height of the clamping seat 33 is lower than that of the clamping block 14, the block 14 can apply a vertical downward force to the third horizontal plate 12, so that the third horizontal plate 12 and the second horizontal plate 11 slide vertically downward along the linear direction of the first slide bar 36, thereby reducing the distance between the second horizontal plate 11 and the first horizontal plate 10, and making the second slide bar 40 slide vertically downward, so that the plug post 17 is plugged into the terminal barrel 16, thereby connecting the wire 18 to the ground wire, so that the substation outgoing line side circuit is connected to the ground wire, so that the substation equipment line is in a safe and protected state, and the operation and maintenance personnel can carry out equipment maintenance work.

[0029] After the operation and maintenance personnel complete the equipment maintenance work, the substation switch is closed, and the switch on one side will stop applying force to the rubber strip 21; on the one hand, the second slide bar 40 will separate the plug-in column 17 from the terminal barrel 16 under the action of the expansion and contraction of the compression spring 28, and on the other hand, the hydraulic cylinder 38 can vertically lift the third cross plate 12, so that the third cross plate 12 applies a vertical upward force to the block 14, and under the rotation of the cross bar 3, the clamping ring 13 is separated from the block 14, thereby disconnecting the path state connecting the substation outgoing line side circuit and the grounding wire, thereby ensuring the normal operation of the substation equipment line.

[0030] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ground line access protection device for switching operation of a substation, comprising a stand (1), characterized in that: The top of the platform (1) is rotatably mounted with a rotating shaft (2), the top of the rotating shaft (2) is provided with a cross bar (3), the cross bar (3) cooperates with the switching transmission of the substation, the bottom end of the rotating shaft (2) is fixedly mounted with a rotating wheel (4), the inside of the platform (1) is fixedly mounted with a side plate (5), the side of the side plate (5) is provided with a vertical sliding slider (6), the slider (6) is transmission-coordinated with the rotating wheel (4) through a hinged rod (7), the side of the slider (6) is fixedly provided with a vertical plate (8), the bottom end of the vertical plate (8) is fastened with a force transmission block (9); the inside of the platform (1) is fixedly mounted with a first cross plate (10), the upper part of the first cross plate (10) is fixedly mounted with a second cross plate (11), the upper part of the second cross plate (11) is provided with a A third horizontal plate (12) that moves vertically, the first horizontal plate (10), the second horizontal plate (11), and the third horizontal plate (12) are all arranged below the side plate (5), the upper surface of the third horizontal plate (12) is provided with a clamping ring (13), and the bottom of the force transmission block (9) is fixedly installed with a clamping block (14) that is clamped with the clamping ring (13); a fourth horizontal plate (15) that is tightly connected to the stand (1) is provided below the first horizontal plate (10), a wiring barrel (16) connected to the ground wire is fixedly installed in the fourth horizontal plate (15), a plug-in post (17) is fixedly provided at the bottom of the first horizontal plate (10), a wire (18) connected to the substation outgoing line side circuit is provided on the side of the plug-in post (17), and the plug-in post (17) can be electrically plugged into the wiring barrel (16).

2. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A support plate (19) is fixedly mounted on the top of the stand (1), the rotating shaft (2) is rotatably matched with the support plate (19), a rubber sleeve (20) is fixedly mounted on the outer wall of the top end of the rotating shaft (2), the cross bar (3) is tightly connected to the rubber sleeve (20), and a rubber strip (21) is fixedly mounted on the outer wall of the end of the cross bar (3), and the rubber strip (21) can contact the side wall of the transformer substation switch.

3. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A fifth transverse plate (22) is fixedly mounted on the side of the side plate (5), the rotating shaft (2) is rotationally engaged with the fifth transverse plate (22), the rotating wheel (4) is arranged below the fifth transverse plate (22), a first connecting column (23) is fixedly mounted on the bottom end surface of the rotating wheel (4), the bottom end of the first connecting column (23) is hinged to a second connecting column (24) via a pin, the second connecting column (24) is fastened to the top end of the hinge rod (7), a ball convex portion (25) is provided at the bottom end of the hinge rod (7), and a circular groove (26) is provided on the top of the slider (6) for sliding engagement with the outer wall of the ball convex portion (25).

4. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A guide rail (27) is fixedly mounted on the side of the side plate (5), and a groove is provided in the slider (6) for sliding engagement with the guide rail (27).

5. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: The side of the slider (6) is fixedly connected to a receiving block (29), and a plurality of sliding rods (30) are provided in the receiving block (29). The length of the sliding rod (30) is greater than the length of the receiving block (29). The top and bottom of the sliding rod (30) are fixedly sleeved with a sleeve (31), and the sleeve (31) is fastened to the vertical plate (8). A limiting column (32) is fixedly installed in the sleeve (31), and the inner end surface of the limiting column (32) can conflict with the receiving block (29).

6. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A clamping seat (33) is fixedly mounted on the upper surface of the third transverse plate (12); the clamping seat (33) is an internal hollow structure; the clamping ring (13) is fastened above the clamping seat (33); and the height dimension of the clamping seat (33) is smaller than the height dimension of the clamping block (14).

7. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A support column (34) is fixedly mounted on the first transverse plate (10), and the support column (34) is tightly connected to the second transverse plate (11). A sliding sleeve (35) is fixedly mounted inside the second transverse plate (11). A plurality of first sliding rods (36) that slide with the sliding sleeve (35) are fixedly mounted on the bottom of the third transverse plate (12). A through hole (37) is provided on the first transverse plate (10) for the first sliding rod (36) to pass through. The through hole (37) is arranged on the outside of the support column (34).

8. A ground wire access protection device for substation switching operation according to claim 7, characterized in that: A hydraulic cylinder (38) is fixedly mounted on the second transverse plate (11), a hydraulic rod of the hydraulic cylinder (38) is arranged vertically upward, a lifting block (39) is fixedly mounted on the hydraulic rod of the hydraulic cylinder (38), and the lifting block (39) is tightly connected to the bottom of the third transverse plate (12).

9. A ground wire access protection device for substation switching operation according to claim 1, characterized in that: A second slide bar (40) is fixedly mounted on the bottom of the second transverse plate (11), and a support (41) is fixedly mounted on the bottom of the first transverse plate (10). The second slide bar (40) is slidably matched with the first transverse plate (10) and the support (41). The bottom end of the second slide bar (40) is fastened to the top end of the plug-in column (17), and a limiting nut (42) is sleeved on the top end of the plug-in column (17).

10. A ground wire access protection device for substation switching operation according to claim 9, characterized in that: A compression spring (28) is mounted on the outer wall of the second slide bar (40), the top end of the compression spring (28) is fastened to the bottom of the second transverse plate (11), and the bottom end of the compression spring (28) is fastened to the top of the first transverse plate (10).

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