A size-adjustable post insulator

Abstract

The application discloses a size-adjustable post insulator, which comprises an insulator body, an iron cap installed at the upper end of the insulator body, a steel foot installed at the lower end of the insulator body, an insulating shield installed at the outer side of the iron cap at the uppermost position in an assembled state, an installation stud installed at the inner side of the steel foot at the lowermost position, and an installation nut threadedly connected to the outer side of the installation stud; further comprising: a clamping seat penetrating through the side wall of the iron cap, and the two clamping seats being elastically connected through a first spring. The size-adjustable post insulator uses movable clamping seats to clamp and lock the iron cap and the steel foot at adjacent positions, and the post insulator is assembled, the installation size of the insulator can be assembled and adjusted according to the required insulator length, the flexibility of use is higher, the post insulator can be adapted to the use of high-voltage wire connection towers at different distribution positions, and the insulator monomer is detachable, thereby being convenient for later maintenance and replacement.

Description

Technical Field

[0001] This invention relates to the field of post insulator technology, specifically to a post insulator with adjustable installation dimensions. Background Technology

[0002] Post insulators play an important role in overhead lines. They are a special type of insulation control. They are installed at one end of the high-voltage power line connecting tower to support the transmission line and increase the creepage distance.

[0003] The invention, disclosed in CN112071523A, is titled "Post Insulator," and includes an insulator body, a clamping fitting at the top of the insulator body, and mounting fittings at the bottom of the insulator body. The clamping fitting includes two fastening studs fixed to the top of the insulator body, a clamping block connected to the fastening studs, and a fastening nut that cooperates with the fastening studs to secure the clamping block. One end of the clamping block is movably sleeved with a fastening stud through a through hole, and the other end has a groove suitable for cooperating with another fastening stud. An elastic limiting mechanism is provided at the opening on the side of the groove on the clamping block, used to close the opening of the groove after the groove and the corresponding fastening stud are engaged. The post insulator of this invention has a reasonable structure, and the operation of installing fittings and connecting cables is convenient and reliable, which helps to reduce the danger of high-altitude operations and has good practicality.

[0004] The existing technology of fixing the insulator body into one piece means that the installation size of the insulator body on the high-voltage power line connection tower cannot be adjusted and fixed according to the different creepage distance settings of the high-voltage power line connection tower. It is necessary to prepare it in advance according to the required size of each distribution part of the high-voltage power line connection tower, which increases the workload. Furthermore, the efficiency of subsequent adaptive maintenance and replacement is low. If dust and other dirt adhere to the surface of the insulator, it will cause flashover damage and affect the service life of the post insulator.

[0005] Therefore, we propose a post insulator with adjustable installation dimensions to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a post insulator with adjustable installation dimensions to solve the problems mentioned in the background art. Currently, due to the different creepage distance settings of high-voltage power line connection towers on the market, the installation dimensions of the insulator body on the high-voltage power line connection tower cannot be adaptively adjusted and fixed. It is necessary to prepare it in advance according to the required dimensions of each distribution part of the high-voltage power line connection tower, which increases the workload. Furthermore, the efficiency of subsequent adaptive maintenance and replacement is low. If dust and other dirt adhere to the surface of the insulator, it will cause flashover damage, affecting the service life of the post insulator.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a post insulator with adjustable installation size, comprising an insulator body, an iron cap installed at the upper end of the insulator body, and a steel foot installed at the lower end of the insulator body. In the assembled state, an insulating cover is installed on the outer side of the iron cap at the uppermost position, and an installation stud is installed on the inner side of the steel foot at the lowermost position, and an installation nut is threaded onto the outer side of the installation stud.

[0008] Also includes:

[0009] The card holder extends through the side wall of the iron cap, and the two card holders are elastically connected by a first spring;

[0010] A limiting rod is installed on the upper side of the insulator body, and a retaining ring is sleeved on the outer side of the limiting rod, and the retaining ring is elastically connected to the upper end of the limiting rod by a second spring;

[0011] Mounting grooves are formed on the inner wall of the steel foot;

[0012] An upper clamping plate is fitted to the outer side of the lower end of the insulating cover, and one end of the upper clamping plate is rotatably connected to an upper clamping plate, and one end of the upper clamping plate and the other end of the upper clamping plate are fixed by bolts;

[0013] The main frame is installed on the outside of the upper clamping plate, and a threaded rod is rotatably connected to the outside of the main frame. A sub-frame is threadedly connected to the outside of the threaded rod. A lower clamping plate is installed at the lower end of the sub-frame, and a lower clamping plate is rotatably connected to one end of the lower clamping plate. One end of the lower clamping plate and the other end of the lower clamping plate are fixed by bolts.

[0014] An air cylinder is installed on the outer side above the main frame, and a hose is connected to the end of the air cylinder. A piston is slidably connected inside the air cylinder. A movable frame is connected to the middle of the piston. A reciprocating screw is threaded to the upper end of the movable frame. One end of the reciprocating screw is rotatably connected to the main frame.

[0015] A rotating rod is rotatably connected to the upper side of the main frame, and a fan blade is installed on the outer side of the rotating rod. The rotating rod and the reciprocating lead screw are connected by a belt.

[0016] Preferably, the lower side of the retaining ring is connected to a nozzle, and the side wall of the retaining ring is connected to a connecting pipe. Two adjacent connecting pipes are connected by a flange. The uppermost connecting pipe and the lower end of the hose are connected by a flange, and the lower end flange of the lowermost connecting pipe is connected to a plug.

[0017] Preferably, the holder is of a side "U"-shaped structure, the holder can slide on the side wall of the iron cap, and the length of the upper end of the holder is smaller than the length of the lower end of the holder. With this design, the lower end of the holder can be pressed to fully retract the upper end of the holder into the iron cap, so as to facilitate clamping the iron cap into the steel pin.

[0018] Preferably, the interior of the retaining ring is of a hollow structure, the nozzles are connected to the lower side of the retaining ring at equal angles, and the nozzles are of an inclined structure. This design can convey airflow, which is ejected from the nozzles to clean the insulator.

[0019] Preferably, the connecting pipe is of a side "T"-shaped structure, and both the upper and lower ends of the connecting pipe are flanged connections. With this design, the connecting pipe can be assembled synchronously when the insulator is assembled, so as to smoothly convey the airflow.

[0020] Preferably, the upper end of the sub-frame penetrates through the main frame and is slidably connected with the main frame, and the vertical surface of the main frame is of a "loop"-shaped structure. This design can limit the movement of the sub-frame, ensure the vertical movement of the sub-frame, and adjust the total length between the main frame and the sub-frame.

[0021] Preferably, the moving frame is of a side "U"-shaped structure, the moving frame penetrates through one end of the gas cylinder, and the moving frame and the gas cylinder form a sliding structure. This design can use the moving frame to drive the piston to slide in the gas cylinder to convey the airflow.

[0022] Preferably, the fan blades are distributed at equal angles on the outer side of the rotating rod, and the rotating rod and the reciprocating screw rod are distributed parallel to each other.

[0023] Preferably, the position of the mounting groove and the position of the holder are arranged to correspond to each other, and the holder and the mounting groove are engaged with each other. This design can realize the fixation of the steel pin and the iron cap by means of the engagement of the holder and the mounting groove, so as to realize the assembly of the post insulator.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The post insulator with adjustable installation size is provided with a holder, which uses the movable holder to engage and lock the iron cap and the steel pin at adjacent positions to assemble the post insulator. The installation size of the insulator can be assembled and adjusted according to the required insulator length, which has high use flexibility, can adapt to high-voltage wire connection towers with different distribution positions, and the insulator unit is detachable, which is convenient for later maintenance and replacement;

[0026] (2) The adjustable post insulator is equipped with a main frame and a sub-frame. The rotation of the threaded rod can drive the sub-frame to move and adjust the total length between the main frame and the sub-frame. This adapts to the length of the insulator. The distance between the upper and lower clamping plates is adjusted to reinforce the installation of the insulator, making the post insulator safer and more stable to use.

[0027] (3) The adjustable-size post insulator is equipped with a nozzle. When the insulator is assembled, the connecting pipe is assembled simultaneously. The fan blade is driven by wind power to rotate, which drives the rotating rod to drive the reciprocating screw to rotate, thereby driving the moving frame to drive the piston to slide in the air cylinder to transport the airflow and clean the insulator body with air jets, so as to avoid floating dust and other impurities from adhering to the insulator body and ensure the cleanliness of the insulator body. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0030] Figure 3 This is a schematic diagram of the rear view structure of the present invention;

[0031] Figure 4 This is a schematic cross-sectional view of the present invention;

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the retaining ring of the present invention;

[0033] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A in the diagram;

[0034] Figure 7 This is a schematic cross-sectional view of the retaining ring structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the three-dimensional structure of the air cylinder of the present invention;

[0036] Figure 9 This is a schematic cross-sectional view of the air cylinder structure of the present invention.

[0037] In the diagram: 1. Insulator body; 2. Iron cap; 3. Steel foot; 4. First spring; 5. Card holder; 6. Retaining ring; 7. Nozzle; 8. Connecting pipe; 9. Hose; 10. Plug; 11. Upper clamping plate; 12. Upper holding plate; 13. Main frame; 14. Threaded rod; 15. Sub-frame; 16. Lower clamping plate; 17. Lower holding plate; 18. Air cylinder; 19. Piston; 20. Moving frame; 21. Reciprocating screw; 22. Rotating rod; 23. Fan blade; 24. Insulating cover; 25. Mounting stud; 26. Mounting nut; 27. Limiting rod; 28. Second spring; 29. ​​Mounting groove. Detailed Description of the Embodiments

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1-9 , the present invention provides the following technical solutions.

[0040] Embodiment 1:

[0041] High-voltage wire connection towers have different settings for creepage distances, the installation dimensions of the insulator body 1 on the high-voltage wire connection tower cannot be adaptively adjusted and fixed, and special preparation is required in advance according to the dimensions required for each distributed part of the high-voltage wire connection tower, which increases the workload and results in low efficiency of subsequent adaptive maintenance and replacement. Therefore, to solve this technical problem, this embodiment further includes the insulator body 1, a iron cap 2 is mounted on the upper end of the insulator body 1, a steel foot 3 is mounted on the lower end of the insulator body 1, an insulating shield 24 is mounted on the outer side of the iron cap 2 at the topmost position in the assembled state, a mounting stud 25 is mounted on the inner side of the steel foot 3 at the bottommost position, and a mounting nut 26 is threadedly connected to the outer side of the mounting stud 25; the clamping seats 5 penetrate through the side wall of the iron cap 2, and the two clamping seats 5 are elastically connected by a first spring 4; the limit rod 27 is mounted on the upper side of the insulator body 1, a retaining ring 6 is sleeved on the outer side of the limit rod 27, and the retaining ring 6 is elastically connected to the upper end of the limit rod 27 by a second spring 28; the mounting groove 29 is formed on the inner wall of the steel foot 3; the upper clamping plate 11 is attached to the outer side of the lower end of the insulating shield 24, one end of the upper clamping plate 11 is rotatably connected with an upper holding plate 12, and one end of the upper holding plate 12 and the other end of the upper clamping plate 11 are fixed by bolts; the main frame 13 is mounted on the outer side of the upper clamping plate 11, the outer side of the main frame 13 is rotatably connected with a threaded rod 14, the outer side of the threaded rod 14 is threadedly connected with an auxiliary frame 15, a lower clamping plate 16 is mounted on the lower end of the auxiliary frame 15, one end of the lower clamping plate 16 is rotatably connected with a lower holding plate 17, and one end of the lower holding plate 17 and the other end of the lower clamping plate 16 are fixed by bolts;

[0042] The clamping seat 5 has a lateral "U"-shaped structure, the clamping seat 5 can slide on the side wall of the iron cap 2, and the length of the upper end of the clamping seat 5 is less than the length of the lower end of the clamping seat 5; the upper end of the auxiliary frame 15 penetrates through the main frame 13 and is slidably connected with the main frame 13, and the vertical surface of the main frame 13 has a "return"-shaped structure; the position of the mounting groove 29 and the position of the clamping seat 5 are arranged to correspond to each other, and the clamping seat 5 and the mounting groove 29 are engaged with each other;

[0043] The working principle of this embodiment is as follows: Figures 4-7 As shown, by pushing the retaining ring 6 downwards, the retaining ring 6 slides on the limiting rod 27 and stretches and stores the second spring 28, releasing the retaining ring 6 from the clamping seat 5. Pressing the lower end of the clamping seat 5 with two fingers retracts the clamping seat 5 into the iron cap 2. Simultaneously, the clamping seat 5 compresses and stores the first spring 4, clamping the iron cap 2 of the lower insulator body 1 into the steel foot 3 of the upper insulator body 1. Releasing the pressure on the clamping seat 5 allows the first spring 4 to control the clamping seat 5 to reset and move, so that the upper end of the clamping seat 5 is clamped into the mounting groove 29. At this time, the second spring 28 can control the retaining ring 6 to move upwards and reset, enclosing the clamping seat 5 to prevent it from shrinking under force, thus completing the installation of the insulator body 1. The number of insulator bodies 1 assembled can be controlled according to the required insulator length, and the installation dimensions of the insulator can be adjusted. The insulating cover 24 is installed on the uppermost iron cap 2, and the mounting stud 25 is installed on the lowermost steel foot 3. Figures 1-2 As shown, the upper clamping plate 11 and the lower clamping plate 16 are respectively clamped to the outside of the mounting ends of the insulating cover 24 and the mounting stud 25, and the upper clamping plate 12 and the lower clamping plate 17 are rotated and locked with bolts to fix the main frame 13 and the auxiliary frame 15 on the insulator. In the early stage, the threaded rod 14 can be rotated according to the length of the insulator to control the movement of the auxiliary frame 15 connected by the outer thread, thereby adjusting the distance between the upper clamping plate 11 and the lower clamping plate 16 to adapt to the length of the insulator and reinforce the installation of the insulator. The transmission line can be limited and supported inside the insulating cover 24, while the mounting stud 25 passes through the end of the high-voltage power line connecting tower and is fixed with the mounting nut 26.

[0044] Example 2:

[0045] If dust and other contaminants adhere to the surface of the insulator, flashover damage will occur, affecting the service life of the post insulator. Therefore, to solve this technical problem, this embodiment also includes an air cylinder 18, which is installed on the outer side above the main frame 13. The end of the air cylinder 18 is connected to a hose 9, and a piston 19 is slidably connected inside the air cylinder 18. A movable frame 20 is connected to the middle of the piston 19, and a reciprocating screw 21 is threadedly connected to the upper end of the movable frame 20. One end of the reciprocating screw 21 is rotatably connected to the main frame 13. A rotating rod 22 is rotatably connected to the upper side of the main frame 13, and a fan blade 23 is installed on the outer side of the rotating rod 22. The rotating rod 22 and the reciprocating screw 21 are connected by a belt. A nozzle 7 is connected to the lower side of the retaining ring 6, and a connecting pipe 8 is connected to the side wall of the retaining ring 6. Two adjacent connecting pipes 8 are connected by a flange. The lower end of the uppermost connecting pipe 8 and the hose 9 are connected by a flange, and a plug 10 is connected to the flange at the lower end of the lowermost connecting pipe 8.

[0046] The baffle ring 6 has a hollow internal structure, and the nozzle 7 is connected to the lower side of the baffle ring 6 at equal angles, and the nozzle 7 has an inclined structure; the connecting pipe 8 has a side "T" shaped structure, and both the upper and lower ends of the connecting pipe 8 are flange connections; the moving frame 20 has a side "U" shaped structure, and the moving frame 20 passes through one end of the air cylinder 18, and the moving frame 20 and the air cylinder 18 form a sliding structure; the fan blades 23 are distributed at equal angles on the outside of the rotating rod 22, and the rotating rod 22 and the reciprocating screw 21 are distributed parallel to each other;

[0047] The working principle of this embodiment is as follows: During the assembly of the insulators, the connecting pipes 8 can be spliced ​​and fixed with flanges. The uppermost connecting pipe 8 is fixed with the flange of the flexible hose 9, while the lowermost connecting pipe 8 is fixed with the flange of the plug pipe 10 to prevent airflow from escaping from the lower end. The wind blows the fan blades 23, which rotate through the rotating rod 22, thereby controlling the rotation of the reciprocating screw 21 connected to the belt, and thus controlling the back-and-forth reciprocating movement of the movable frame 20 connected to the outer thread. Figures 8-9 As shown, when the moving frame 20 drives the piston 19 to move backward, it can draw airflow into the air cylinder 18. When the moving frame 20 drives the piston 19 to move forward, it can deliver airflow through the hose 9 and the connecting pipe 8 to the retaining ring 6, and then spray it out from the nozzle 7 to perform air jet cleaning on the insulator body 1, so as to prevent dust and other impurities from adhering to the insulator body 1 and ensure the cleanliness of the insulator body 1.

[0048] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0049] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable-size post insulator, comprising an insulator body (1), wherein an iron cap (2) is installed at the upper end of the insulator body (1), and a steel foot (3) is installed at the lower end of the insulator body (1). In the assembled state, an insulating cover (24) is installed on the outer side of the iron cap (2) at the uppermost position, and an installation stud (25) is installed on the inner side of the steel foot (3) at the lowermost position. An installation nut (26) is threadedly connected to the outer side of the installation stud (25). Its features are: Also includes: The card holder (5) passes through the side wall of the iron cap (2), and the two card holders (5) are elastically connected by the first spring (4); A limiting rod (27) is installed on the upper side of the insulator body (1), and a retaining ring (6) is sleeved on the outer side of the limiting rod (27), and the retaining ring (6) is elastically connected to the upper end of the limiting rod (27) through a second spring (28); Mounting groove (29) is formed on the inner wall of the steel foot (3); The upper clamping plate (11) is fitted to the outer side of the lower end of the insulating cover (24), and one end of the upper clamping plate (11) is rotatably connected to the upper clamping plate (12), and one end of the upper clamping plate (12) and the other end of the upper clamping plate (11) are fixed by bolts; The main frame (13) is installed on the outside of the upper clamping plate (11), and a threaded rod (14) is rotatably connected to the outside of the main frame (13), and a sub-frame (15) is threadedly connected to the outside of the threaded rod (14). A lower clamping plate (16) is installed at the lower end of the sub-frame (15), and a lower clamping plate (17) is rotatably connected to one end of the lower clamping plate (16). One end of the lower clamping plate (17) and the other end of the lower clamping plate (16) are fixed by bolts. An air cylinder (18) is installed on the outer side above the main frame (13), and the end of the air cylinder (18) is connected to a hose (9). A piston (19) is slidably connected inside the air cylinder (18). A movable frame (20) is connected to the middle of the piston (19), and a reciprocating screw (21) is threadedly connected to the upper end of the movable frame (20). One end of the reciprocating screw (21) is rotatably connected to the main frame (13). A rotating rod (22), which is rotatably connected to the upper side of the main frame (13), fan blades (23) are mounted on the outer side of the rotating rod (22), and the rotating rod (22) and the reciprocating screw rod (21) are connected by a belt; the lower side of the baffle ring (6) is communicated with a spray head (7), the side wall of the baffle ring (6) is communicated with connecting pipes (8), two adjacent connecting pipes (8) are connected by flanges, the uppermost connecting pipe (8) is connected with the lower end of the hose (9) by a flange, and the lower end of the lowermost connecting pipe (8) is flange-connected with a plug pipe (10); the interior of the baffle ring (6) is a hollow structure, the spray heads (7) are connected to the lower side of the baffle ring (6) at equal angles, and the spray heads (7) are of an inclined structure; the position of the mounting groove (29) and the position of the clamping seat (5) are arranged to correspond to each other, and the clamping seat (5) and the mounting groove (29) are engaged with each other.

2. The adjustable-size post insulator according to claim 1, characterized in that: The clamping seat (5) is of a side U-shaped structure, the clamping seat (5) can slide on the side wall of the iron cap (2), and the length of the upper end of the clamping seat (5) is smaller than the length of the lower end of the clamping seat (5).

3. The adjustable-size post insulator according to claim 2, characterized in that: The connecting pipe (8) is of a side T-shaped structure, and both the upper and lower ends of the connecting pipe (8) are in flange connection.

4. The adjustable-size post insulator according to claim 1, characterized in that: The upper end of the sub-frame (15) penetrates through the main frame (13) and is slidably connected with the main frame (13), and the vertical surface of the main frame (13) is of a hollow square-shaped structure.

5. A post insulator with adjustable installation dimensions according to claim 1, characterized in that: The moving frame (20) is of a side U-shaped structure, the moving frame (20) penetrates through one end of the gas cylinder (18), and the moving frame (20) and the gas cylinder (18) form a sliding structure.

6. The adjustable-size post insulator according to claim 1, characterized in that: The fan blades (23) are distributed on the outer side of the rotating rod (22) at equal angles, and the rotating rod (22) and the reciprocating screw rod (21) are distributed parallel to each other.

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