A neutral point grounding switch structure

Abstract

The utility model discloses a kind of neutral point grounding switch structures, including mounting bracket, firm base and movable rod, the upper portion of mounting bracket is equipped with second insulator post, and the upper portion of second insulator post is equipped with neutral point disconnecting switch, the lower portion of neutral point disconnecting switch is equipped with first insulator post, the inside of first insulator post and second insulator post is equipped with high-strength ceramic inner tube, the outside of high-strength ceramic inner tube is equipped with umbrella skirt-shaped insulating silicone rubber, the inside of high-strength ceramic inner tube is equipped with high-strength core rod, the outer wall of high-strength core rod is evenly fixedly connected with the inner wall of high-strength ceramic inner tube through fixed insulating piece, the outer wall of high-strength ceramic inner tube is evenly provided with a plurality of first reinforcing ribs along axial direction, and adjacent first reinforcing rib is connected to form fixed cooperation by a plurality of second reinforcing ribs, improve bending resistance, compression strength, increase quick docking device, facilitate installation.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a neutral point grounding switch structure. Background Technology

[0002] A neutral point grounding switch is a switching device used to directly ground the neutral point of a transformer. In a power system, the function of the transformer neutral point grounding switch is to ensure the safe and stable operation of the power system. An insulator post is a device installed between conductors at different potentials or between a conductor and a grounding component, capable of withstanding voltage and mechanical stress. In overhead transmission lines, insulator posts play two basic roles: supporting the conductors and preventing current from returning to the ground. These two roles must be guaranteed, and insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions.

[0003] Existing insulator posts have low mechanical strength, poor performance, and lack quick-release structure. They generally require the removal of multiple bolts via flanges, which is time-consuming and labor-intensive. Utility Model Content

[0004] This utility model provides a neutral point grounding switch structure, which aims to solve the problems mentioned above, such as the low mechanical strength, poor performance, and lack of quick-release structure of existing insulator posts, which generally require the removal of multiple bolts through flanges, which is time-consuming and laborious.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A neutral point grounding switch structure includes a mounting frame, a stable base, and a movable rod. A second insulator post is mounted above the mounting frame, and a neutral point disconnecting switch is mounted above the second insulator post. A first insulator post is mounted below the neutral point disconnecting switch. Both the first and second insulator posts have high-strength ceramic inner tubes installed inside. The outer sides of the high-strength ceramic inner tubes are fitted with umbrella-shaped insulating silicone rubber. A high-strength core rod is installed on the inner side of each high-strength ceramic inner tube. The outer walls of the high-strength core rods are uniformly fixedly connected to the inner walls of the high-strength ceramic inner tubes through fixed insulating components. The outer walls of the high-strength ceramic inner tubes are uniformly provided with a plurality of first reinforcing ribs along the axial direction, and adjacent first reinforcing ribs are connected by a plurality of second reinforcing ribs to form a fixed fit.

[0006] Preferably, the outer wall of the high-strength ceramic inner tube is provided with a plurality of first reinforcing ribs at equal intervals along the axial direction, and all the first reinforcing ribs are coaxial with the high-strength ceramic inner tube.

[0007] Preferably, the second reinforcing ribs in each layer are distributed at equal intervals around the axis between adjacent first reinforcing ribs, and all the second reinforcing ribs are parallel to the axial direction of the high-strength ceramic inner tube.

[0008] Preferably, the high-strength core rod and the high-strength ceramic inner tube are coaxial, the fixed insulating parts are all arranged radially, and a number of fixed insulating parts are evenly distributed axially.

[0009] Preferably, the high-strength mandrel is made of glass fiber reinforced epoxy resin.

[0010] Preferably, both ends of the second insulator post are equipped with a stabilizing base, and the outer wall of the stabilizing base is equipped with a locking sleeve. Movable rods are evenly and movably installed on the outer wall of the stabilizing base, and one end of each movable rod is connected to a locking block. The outer wall of both ends of the second insulator post is provided with a locking groove that cooperates with the locking block.

[0011] More preferably, the outer wall of the stabilizing base is provided with external threads, and the inner wall of the locking sleeve is connected to the stabilizing base through internal threads to form a threaded connection structure.

[0012] Furthermore, each of the movable rods is connected to a connecting plate at the other end, and a first return spring is installed on the outer wall of the movable rod inside the connecting plate.

[0013] Furthermore, the inner wall of the stable base is uniformly provided with positioning grooves, and the outer walls at both ends of the second insulator post are connected with positioning blocks that cooperate with the positioning grooves.

[0014] Specifically, a damper is installed on the inner wall of one side of the stable base, and a second return spring is installed on the outer wall of the damper. One end of the damper is connected to a connecting rod, and a pull plate is connected to one side of the connecting rod. A locking block is connected to the inner wall of the pull plate, and a locking groove that cooperates with the locking block is provided on the outer wall of the locking sleeve.

[0015] The beneficial effects of this utility model are: 1. This utility model uses a steel cage structure formed by the first and second reinforcing ribs to limit and wrap the outside of the high-strength ceramic inner tube, and uses a high-strength core rod and fixed insulating parts to limit and support the inside of the high-strength ceramic inner tube, thereby improving the mechanical strength of the insulator column and enhancing its bending and compressive strength. 2. The return spring and movable rod form an elastic locking structure for the locking block, making the stable base a quick-connect device. When installation is required, the end of the second insulator post is inserted into the stable base. During the insertion process, the first return spring contracts, and the locking block is pressed between the end of the second insulator post and the inner wall of the stable base until the locking slot and the locking block match one by one. Under the reaction of the first return spring, the locking block is inserted into the corresponding locking slot to form a limit, completing the quick docking installation. Attached Figure Description

[0016] Figure 1 This is a plan view of the present invention; Figure 2 This is a cross-sectional schematic diagram of the insulator post of this utility model; Figure 3 This is a top view of the interior of the insulator post of this utility model; Figure 4 This is a cross-sectional schematic diagram of the stable base of this utility model; Figure 5 This is a top view of the installation of the card block and card slot of this utility model; Figure 6 For the present utility model Figure 4 Enlarged view of point A; In the diagram: 1. First insulator post; 2. Neutral point disconnect switch; 3. Second insulator post; 4. Mounting bracket; 5. First reinforcing rib; 6. High-strength ceramic inner tube; 7. Umbrella-shaped insulating silicone rubber; 8. High-strength core rod; 9. Second reinforcing rib; 10. Fixed insulating component; 11. Slot; 12. Stable base; 13. Locking sleeve; 14. Connecting plate; 15. Locking block; 16. Positioning slot; 17. First return spring; 18. Movable rod; 19. Positioning block; 20. Pull plate; 21. Locking block; 22. Locking slot; 23. Second return spring; 24. Damper; 25. Connecting rod. Detailed Implementation

[0017] The embodiments will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-3 As shown in the preferred embodiment 1, a neutral point grounding switch structure includes a mounting frame 4, a stable base 12, and a movable rod 18. A second insulator post 3 is installed above the mounting frame 4, and a neutral point disconnecting switch 2 is installed above the second insulator post 3. Referring to the existing GW13-72.5 / 400 outdoor neutral point disconnecting switch, a first insulator post 1 is installed below the neutral point disconnecting switch 2. A high-strength ceramic inner tube 6 is installed inside both the first insulator post 1 and the second insulator post 3. A skirt-shaped insulating silicone rubber 7 is installed on the outside of the high-strength ceramic inner tube 6. A high-strength core rod 8 is installed on the inside of the high-strength ceramic inner tube 6. The outer wall of the high-strength core rod 8 is uniformly fixedly connected to the inner wall of the high-strength ceramic inner tube 6 through a fixed insulating member 10. A plurality of first reinforcing ribs 5 are uniformly provided along the axial direction on the outer wall of the high-strength ceramic inner tube 6, and adjacent first reinforcing ribs 5 are connected by a plurality of second reinforcing ribs 9 to form a fixed fit.

[0019] Preferably, the outer wall of the high-strength ceramic inner tube 6 is provided with a plurality of first reinforcing ribs 5 at equal intervals along the axial direction, and all the first reinforcing ribs 5 are coaxial with the high-strength ceramic inner tube 6.

[0020] Preferably, the second reinforcing ribs 9 in each layer are distributed at equal intervals around the axis between adjacent first reinforcing ribs 5, and all the second reinforcing ribs 9 are parallel to the axial direction of the high-strength ceramic inner tube 6.

[0021] Preferably, the first reinforcing rib 5 and the second reinforcing rib 9 are made of insulating material.

[0022] The high-strength ceramic inner tube 6 is externally confined and wrapped by the first reinforcing rib 5 and the second reinforcing rib 9 to form a steel cage structure, thereby improving mechanical strength and enhancing bending and compressive strength.

[0023] Preferably, the high-strength core rod 8 and the high-strength ceramic inner tube 6 are coaxial, the fixed insulating parts 10 are all arranged radially, and a number of fixed insulating parts 10 are evenly distributed axially.

[0024] The high-strength ceramic inner tube 6 is limited and supported by the high-strength core rod 8 and the fixed insulating component 10, thereby improving mechanical strength and enhancing bending and compressive strength.

[0025] Preferably, the high-strength mandrel 8 is made of glass fiber reinforced epoxy resin to ensure strength and insulation performance.

[0026] like Figure 1 , Figure 4 and Figure 5 As shown, in a preferred embodiment 2, both ends of the second insulator post 3 are equipped with a stabilizing base 12, and the outer wall of the stabilizing base 12 is equipped with a locking sleeve 13. Movable rods 18 are evenly and movably installed on the outer wall of the stabilizing base 12, and one end of each movable rod 18 is connected to a locking block 15. The outer wall of both ends of the second insulator post 3 is provided with a locking groove 11 that cooperates with the locking block 15. The other end of each movable rod 18 is connected to a connecting plate 14, and a first return spring 17 is installed on the outer wall of the movable rod 18 inside the connecting plate 14.

[0027] The return spring 17 and the movable rod 18 form an elastic locking structure for the locking block 15, making the stable base 12 a quick-connect device. When installation is required, the end of the second insulator post 3 is inserted into the stable base 12. During the insertion process, the first return spring 17 contracts, and the locking block 15 is pressed between the end of the second insulator post 3 and the inner wall of the stable base 12 until the locking slot 11 matches the locking block 15 one by one. Under the reaction of the first return spring 17, the locking block 15 is inserted into the corresponding locking slot 11 to form a limit, completing the quick docking installation.

[0028] Preferably, the outer wall of the stabilizing base 12 is provided with external threads, and the inner wall of the locking sleeve 13 is connected to the stabilizing base 12 by internal threads. This facilitates the installation and fixing of the locking sleeve 13 and makes it easy to adjust its position. In use, first adjust and fix the position of the locking sleeve 13, then install the movable rod 18 and the first return spring 17 inside the locking sleeve 13, so that it passes through the outer wall of the stabilizing base 12 and exits from the inner wall, and finally install the locking block 15 at the end. Alternatively, the locking block 15, the movable rod 18, and the first return spring 17 can be assembled first, and then the whole assembly can be passed through from the inside to the outside and fixed with the locking sleeve 13. The specific installation method can be selected according to the situation.

[0029] like Figure 5 As shown, in a more preferred embodiment 3, based on embodiment 2, the inner wall of the stable base 12 is uniformly provided with positioning grooves 16, and the outer walls at both ends of the second insulator post 3 are connected with positioning blocks 19 that cooperate with the positioning grooves 16.

[0030] Preferably, the positioning block 19 and the slot 11 are distributed alternately.

[0031] The positioning block 19 and the positioning groove 16 work together to ensure the stability of the installation and avoid relative displacement.

[0032] like Figure 6 As shown, in a more preferred embodiment 4, based on embodiment 2, a damper 24 is installed on the inner wall of one side of the stable base 12, and a second return spring 23 is installed on the outer wall of the damper 24. One end of the damper 24 is connected to a connecting rod 25, and one side of the connecting rod 25 is connected to a pull plate 20. The inner wall of the pull plate 20 is connected to a locking block 21, and the outer wall of the locking sleeve 13 is provided with a locking groove 22 that cooperates with the locking block 21.

[0033] To further ensure the positional relationship between the locking sleeve 13 and the stable base 12: When the limit is released, pull the pull plate 20 radially outward, which will drive the connecting rod 25 to compress the second return spring 23 into an energy storage state, the damper 24 will contract, the locking block 21 will be located outside the locking groove 22, the limit is released, and the locking sleeve 13 can be disassembled. When a limit is required, align the locking block 21 with the locking groove 22, release the pull plate 20, the second return spring 23 releases energy and drives the damper 25 to extend, so that the connecting rod 25 moves radially inward under the reaction force, driving the pull plate 20 to move radially inward, and the pull plate 20 drives the locking block 21 to insert into the locking groove 22 to complete the limit.

[0034] The working principle of this utility model: This utility model uses a steel cage structure formed by the first reinforcing rib 5 and the second reinforcing rib 9 to limit and wrap the outside of the high-strength ceramic inner tube 6, and uses the high-strength core rod 8 and the fixed insulating part 10 to limit and support the inside of the high-strength ceramic inner tube 6, thereby improving the mechanical strength of the insulator column and improving its bending and compressive strength. The return spring 17 and the movable rod 18 form an elastic locking structure for the locking block 15, making the stable base 12 a quick-connect device. When installation is required, the end of the second insulator post 3 is inserted into the stable base 12. During the insertion process, the first return spring 17 contracts, and the locking block 15 is pressed between the end of the second insulator post 3 and the inner wall of the stable base 12 until the locking slot 11 matches the locking block 15 one by one. Under the reaction of the first return spring 17, the locking block 15 is inserted into the corresponding locking slot 11 to form a limit, completing the quick docking installation.

Claims

1. A neutral point grounding switch structure, comprising a mounting frame (4), a stable base (12), and a movable rod (18), wherein a second insulator post (3) is mounted above the mounting frame (4), and a neutral point disconnecting switch (2) is mounted above the second insulator post (3), and a first insulator post (1) is mounted below the neutral point disconnecting switch (2), characterized in that, The first insulator post (1) and the second insulator post (3) are both equipped with high-strength ceramic inner tubes (6). The outer side of the high-strength ceramic inner tubes (6) is equipped with umbrella-shaped insulating silicone rubber (7). The inner side of the high-strength ceramic inner tubes (6) is equipped with high-strength core rods (8). The outer wall of the high-strength core rods (8) is uniformly fixedly connected to the inner wall of the high-strength ceramic inner tubes (6) through fixed insulating parts (10). The outer wall of the high-strength ceramic inner tubes (6) is uniformly provided with a number of first reinforcing ribs (5) along the axial direction. Adjacent first reinforcing ribs (5) are connected by a number of second reinforcing ribs (9) to form a fixed fit.

2. The neutral point grounding switch structure according to claim 1, characterized in that, The outer wall of the high-strength ceramic inner tube (6) is provided with a number of first reinforcing ribs (5) at equal intervals along the axial direction, and all the first reinforcing ribs (5) are coaxial with the high-strength ceramic inner tube (6).

3. The neutral point grounding switch structure according to claim 1, characterized in that, The second reinforcing ribs (9) of each layer are distributed at equal intervals around the axis between the adjacent first reinforcing ribs (5), and the second reinforcing ribs (9) are all parallel to the axial direction of the high-strength ceramic inner tube (6).

4. The neutral point grounding switch structure according to claim 1, characterized in that, The high-strength core rod (8) is coaxial with the high-strength ceramic inner tube (6), and the fixed insulating parts (10) are all arranged radially, and a number of fixed insulating parts (10) are evenly distributed axially.

5. The neutral point grounding switch structure according to claim 1, characterized in that, The high-strength mandrel (8) is made of glass fiber reinforced epoxy resin.

6. A neutral point grounding switch structure according to any one of claims 1 to 5, characterized in that, Both ends of the second insulator post (3) are equipped with a stabilizing base (12), and the outer wall of the stabilizing base (12) is equipped with a locking sleeve (13). Movable rods (18) are evenly and movably installed on the outer wall of the stabilizing base (12), and one end of the movable rod (18) is connected to a locking block (15). The outer walls of both ends of the second insulator post (3) are provided with a locking groove (11) that cooperates with the locking block (15).

7. The neutral point grounding switch structure according to claim 6, characterized in that, The outer wall of the stabilizing base (12) is provided with external threads, and the inner wall of the locking sleeve (13) is connected to the stabilizing base (12) by internal threads to form a threaded connection structure.

8. The neutral point grounding switch structure according to claim 7, characterized in that, The other end of each movable rod (18) is connected to a connecting plate (14), and a first return spring (17) is installed on the outer wall of the movable rod (18) inside the connecting plate (14).

9. A neutral point grounding switch structure according to claim 8, characterized in that, The inner wall of the stable base (12) is uniformly provided with positioning grooves (16), and the outer walls at both ends of the second insulator post (3) are connected with positioning blocks (19) that cooperate with the positioning grooves (16).

10. A neutral point grounding switch structure according to claim 9, characterized in that, Dampers (24) are installed on the inner wall of one side of the stable base (12), and second return springs (23) are installed on the outer wall of the dampers (24). One end of each damper (24) is connected to a connecting rod (25), and one side of each connecting rod (25) is connected to a pull plate (20). The inner wall of each pull plate (20) is connected to a locking block (21), and the outer wall of each locking sleeve (13) is provided with a locking groove (22) that cooperates with the locking block (21).

Images