High-voltage line cross arm type insulator

Abstract

The utility model relates to insulator technical field discloses a kind of high-voltage line cross arm type insulators, including mounting seat, and the insulator body being installed on the top of mounting seat, sleeve is set on the top surface of mounting seat, the inside of sleeve is provided with the connecting cylinder that can be up and down active, and height compensation mechanism for adjusting the height of connecting cylinder is set;The inside of connecting cylinder is provided with thread groove, and the outside wall of insulator body near bottom is provided with outer thread matched with thread groove;When connecting cylinder or up or down active, insulator body adjusts height along with connecting cylinder or up or down;The position of connecting cylinder is adjusted by height compensation mechanism, and then after insulator is fixedly installed to cross arm, the height of insulator body is compensated within a certain range, high-voltage line sag is accurately controlled, and the safety distance of wire and ground, building under complex working conditions such as high temperature, gale is ensured.

Description

Technical Field

[0001] This utility model relates to the field of insulator technology, and in particular to a crossarm insulator for high-voltage lines. Background Technology

[0002] Insulators play two fundamental roles in overhead transmission lines: supporting the conductors and preventing current from returning to the ground. These two roles must be guaranteed. Insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulators will not play a significant role and will damage the service and operational life of the entire line.

[0003] Most existing insulators are fixed in place, connected to the crossarm structure, and the crossarm is also fixed to the high-voltage line frame. However, in practical applications, the conductor sag is easily affected by factors such as changes in ambient temperature, conductor weight, and line span. When high temperature causes the conductor to expand and elongate, or when the sag exceeds the design range due to large line span or icing, the safe distance between the conductor and the ground or buildings may be insufficient, posing risks such as short circuits and line breaks. On the other hand, if the sag is too small, the conductor tension will be too high, accelerating the aging and damage of the insulator and connecting components. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a crossarm insulator for high-voltage lines to solve the above-mentioned shortcomings in the prior art.

[0005] Technical solution: A high-voltage line crossarm insulator includes a mounting base and an insulator body mounted on the mounting base. A sleeve is provided on the top surface of the mounting base, and a connecting cylinder that can move up and down is provided inside the sleeve, as well as a height compensation mechanism for adjusting the height of the connecting cylinder.

[0006] The connecting cylinder has a threaded groove inside, and the outer side wall of the insulator body near the bottom has an external thread that matches the threaded groove.

[0007] When the connecting cylinder moves up or down, the height of the insulator body adjusts accordingly.

[0008] As a further description of the above technical solution: the height compensation mechanism includes two movable seats, each of which is fixedly connected to a second rotating shaft, and a support rod is rotatably connected to the second rotating shaft;

[0009] Furthermore, the height compensation mechanism also includes two fixed seats disposed on the bottom surface of the connecting cylinder, and a rotating shaft is fixedly connected to each fixed seat;

[0010] The end of each support rod away from the second rotating shaft is rotatably connected to the corresponding first rotating shaft;

[0011] Furthermore, each of the movable seats is provided with a connecting plate on both sides that can slide horizontally on the mounting seat.

[0012] As a further description of the above technical solution: the mounting base is provided with a connecting frame, and the connecting frame and the connecting plate are connected by a locking bolt, and the locking bolt is provided with a matching nut.

[0013] As a further description of the above technical solution: the mounting base is provided with a sliding groove for the movable seat to slide, and the mounting base is provided with a through groove that is arranged in connection with the sliding groove for the connecting plate to move.

[0014] As a further description of the above technical solution: a limiting ring block is provided on the side wall of the connecting cylinder near the top and bottom.

[0015] As a further description of the above technical solution: the mounting base is also provided with a mounting ear plate, which is used to connect with the crossarm.

[0016] As a further description of the above technical solution: the top of the insulator body is provided with a wire groove for placing the high-voltage line into the inside of the wire groove.

[0017] As a further description of the above technical solution: the two support rods are symmetrically arranged inside the sleeve, and the sleeve is provided with an adapter groove for the support rods to pass through.

[0018] Beneficial effects: By adjusting the position of the connecting cylinder through the height compensation mechanism, the height of the insulator body can be compensated within a certain range after the insulator is fixedly installed on the crossarm, accurately controlling the sag of the high-voltage line and ensuring the safe distance between the conductor and the ground and buildings under complex working conditions such as high temperature and strong wind;

[0019] In addition, by using locking bolts and nuts to lock the insulator body to the top wall of the connecting frame, reliable fixation of the insulator body after height adjustment is achieved, which effectively improves the stability and reliability of high-voltage line operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a high-voltage line crossarm insulator proposed in this utility model;

[0021] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0022] Figure 3 This is a partial three-dimensional exploded structure diagram of the present invention;

[0023] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 5 This is a three-dimensional structural diagram of the insulator body of this utility model.

[0025] Legend:

[0026] 1. Mounting base; 2. Insulator body; 3. Sleeve; 4. Connecting cylinder; 5. Threaded groove; 6. Fixed base; 7. Support rod; 8. No. 1 rotating shaft; 9. No. 2 rotating shaft; 10. Movable base; 11. Connecting plate; 12. Locking bolt; 13. Nut; 14. Limiting ring block; 15. Sliding groove; 16. Through groove; 17. External thread; 18. Mounting ear plate; 19. Connecting frame; 20. Wire groove. Detailed Implementation

[0027] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figures 1-5 A high-voltage line crossarm insulator includes a mounting base 1 and an insulator body 2 mounted on the mounting base 1. A sleeve 3 is provided on the top surface of the mounting base 1. A connecting cylinder 4 that can move up and down is provided inside the sleeve 3, and a height compensation mechanism for adjusting the height of the connecting cylinder 4 is provided.

[0029] The connecting cylinder 4 has a threaded groove 5 inside, and the outer wall of the insulator body 2 near the bottom has an external thread 17 that matches the threaded groove 5. By rotating the external thread 17 into the threaded groove 5, it is easy to install and disassemble the insulator body 2, and thus replace the insulator body 2. Both the connecting cylinder 4 and the connecting cylinder 4 are preferably made of inner ceramic material and outer stainless steel material. The inner ceramic material corresponds to the ceramic material of the insulator body 2, which has the advantages of wear resistance and corrosion resistance. The addition of stainless steel material to the outer layer of the connecting cylinder 4 can provide the necessary rigidity.

[0030] When the connecting cylinder 4 moves up or down, the insulator body 2 adjusts its height accordingly. When the high-voltage line is overhead, the sag of the high-voltage line must be strictly controlled within the design range. Even a small deviation may lead to safety hazards. Through the height compensation mechanism, under the premise that the height of the crossarm installed on the high-voltage line frame is not easily changed, this solution is used to adjust the height of the insulator body 2 to accurately match the sag requirements of the high-voltage line under different temperatures and spans. For example, when the conductor expands and elongates due to high temperatures, the insulator height is reduced to compensate for the sag increase, ensuring that the conductor maintains a safe distance from the ground and buildings.

[0031] Furthermore, the height compensation mechanism includes two movable seats 10, each of which is fixedly connected to a second rotating shaft 9, and a support rod 7 is rotatably connected to the second rotating shaft 9;

[0032] Furthermore, the height compensation mechanism also includes two fixed seats 6 disposed on the bottom surface of the connecting cylinder 4, and a rotating shaft 8 is fixedly connected to each fixed seat 6;

[0033] The end of each support rod 7 away from the second rotating shaft 9 is rotatably connected to the corresponding first rotating shaft 8;

[0034] Furthermore, each of the movable seats 10 is provided with a connecting plate 11 on both sides that can slide horizontally on the mounting seat 1. By adjusting the position of the connecting plate 11, the movable seat 10 drives the support rod 7 to rotate, thereby compensating the height of the insulator body 2 above through the connecting cylinder 4.

[0035] Specifically, by adjusting the horizontal position of the connecting plate 11 on the mounting base 1, the connecting plate 11 drives the support rod 7 to rotate. Since the bottom of the support rod 7 is confined inside the slide groove 15, the overall height of the support rod 7 will change during the rotation. This will cause the connecting cylinder 4 to move up or down through the fixed base 6, thereby adjusting the height of the insulator body 2.

[0036] Furthermore, the mounting base 1 is provided with a connecting frame 19, and the connecting frame 19 and the connecting plate 11 are connected by a locking bolt 12. The locking bolt 12 is provided with a matching nut 13, and preferably three nuts 13 are provided. The bottom nut 13 cooperates with the locking bolt 12 to clamp onto the top wall of the connecting frame 19. The clamping effect restricts the locking bolt 12 from moving the connecting plate 11 in the horizontal direction. The two nuts 13 are used to clamp and fix the connecting plate 11. Specifically, the locking bolt 12 passes through the connecting plate 11 and the connecting plate 11 is placed in the middle position of the two nuts 13 to fix the connecting plate 11. Thus, by restricting the position of the connecting plate 11, the height of the insulator body 2 can be fixed. In order to prevent the nuts 13 from loosening, washers can be placed in them to improve stability.

[0037] Furthermore, the mounting base 1 is provided with a sliding groove 15 for the movable seat 10 to slide, which restricts the direction of movement of the movable seat 10, and the mounting base 1 is provided with a through groove 16 that is arranged through the sliding groove 15, for the connecting plate 11 to move.

[0038] Furthermore, a limiting ring block 14 is provided on the side wall near the top and bottom of the connecting cylinder 4 to limit the movement of the connecting cylinder 4 from the inside of the sleeve 3.

[0039] Furthermore, the mounting base 1 is also provided with a mounting ear plate 18, which is used to connect with the crossarm and is fixed to the crossarm by bolts.

[0040] Furthermore, the top of the insulator body 2 is provided with a wire groove 20 for placing the high-voltage line inside the wire groove 20, and it can be fixed by binding or bolting. These are existing methods, and no specific limitation is made here. As long as it can ensure that the high-voltage line is stably fixed inside the wire groove 20.

[0041] Furthermore, the two support rods 7 are symmetrically arranged inside the sleeve 3, and the sleeve 3 is provided with an adapter groove for the support rods 7 to pass through, so as to avoid blocking the movement of the support rods 7.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-voltage line crossarm insulator, comprising a mounting base (1) and an insulator body (2) mounted above the mounting base (1), characterized in that, A sleeve (3) is provided on the top surface of the mounting base (1). Inside the sleeve (3) is a connecting cylinder (4) that can move up and down, and a height compensation mechanism for adjusting the height of the connecting cylinder (4). The connecting cylinder (4) has a threaded groove (5) inside, and the insulator body (2) has an external thread (17) on the outer side wall near the bottom that is used in conjunction with the threaded groove (5). When the connecting cylinder (4) moves up or down, the insulator body (2) adjusts its height accordingly.

2. A high-voltage line crossarm insulator according to claim 1, characterized in that, The height compensation mechanism includes two movable seats (10), each of which is fixedly connected to a second rotating shaft (9), and a support rod (7) is rotatably connected to the second rotating shaft (9). Furthermore, the height compensation mechanism also includes two fixed seats (6) set on the bottom surface of the connecting cylinder (4), and a rotating shaft (8) is fixedly connected to each fixed seat (6). The end of each support rod (7) away from the second rotating shaft (9) is rotatably connected to the corresponding first rotating shaft (8); Each of the movable seats (10) is provided with a connecting plate (11) on both sides that can slide horizontally on the mounting seat (1).

3. A high-voltage line crossarm insulator according to claim 2, characterized in that, The mounting base (1) is provided with a connecting frame (19), and the connecting frame (19) and the connecting plate (11) are connected by a locking bolt (12), and the locking bolt (12) is provided with a nut (13) for use with it.

4. A high-voltage line crossarm insulator according to claim 2, characterized in that, The mounting base (1) is provided with a sliding groove (15) for the movable seat (10) to slide, and the mounting base (1) is provided with a through groove (16) that is connected to the sliding groove (15) for the connecting plate (11) to move.

5. A high-voltage line crossarm insulator according to claim 1, characterized in that, The connecting cylinder (4) has a limiting ring block (14) on its side wall near the top and bottom.

6. A high-voltage line crossarm insulator according to claim 1, characterized in that, The mounting base (1) is also provided with a mounting ear plate (18), which is used to connect with the crossarm.

7. A high-voltage line crossarm insulator according to claim 1, characterized in that, The top of the insulator body (2) is provided with a wire groove (20) for placing the high voltage line into the inside of the wire groove (20).

8. A high-voltage line crossarm insulator according to claim 2, characterized in that, The two support rods (7) are symmetrically arranged inside the sleeve (3), and the sleeve (3) is provided with an adapter groove for the support rods (7) to pass through.

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