Cable fixing device of power transmission line iron tower

Abstract

The utility model relates to the technical field of electric power iron towers, in particular to a cable fixing device of a power transmission line iron tower, which comprises a support, a cable clamp is mounted on the support, the support comprises a support mounting portion and a cable clamp mounting portion, the support mounting portion comprises a support fixing plate, and the cable clamp mounting portion comprises a cable clamp fixing plate. The two sides of the wire clamp fixing plate are fixedly connected with the support fixing plate through a connecting plate, the outer side of the connecting plate is fixedly connected with a bolt limiting plate, the support is fixedly installed on an iron tower through a first bolt and a first nut, and the first bolt sequentially penetrates through the bolt limiting plate and the support fixing plate. And a blocking piece for preventing the stud of the first bolt from being separated from the support fixing plate is arranged between the bolt limiting plate and the support fixing plate. The device is simple in structure, the blocking piece can prevent the first bolt from falling off during installation, and installation is more convenient and faster.

Description

Technical Field

[0001] This utility model relates to the field of power transmission tower technology, specifically a cable fixing device for power transmission line towers. Background Technology

[0002] Transmission towers are large structures used to support power transmission lines, playing a crucial role in power systems. These towers are typically assembled from steel profiles and must withstand the effects of extreme weather conditions such as strong winds, snow, and earthquakes. The tower structure includes the tower body and the tower head. The base of the tower body is supported on a foundation, while the tower head is located at the top of the tower body and has outward-extending crossarms. The tower supports the cables, which are connected to the tower head via insulated tension strings and other components as they pass over the tower. Sometimes, the cables need to be secured below the crossarms. One method is to install brackets below the crossarms and then use U-shaped clamps to secure the cables to the brackets. The brackets and cables are typically secured using bolts and nuts. During installation, bolts pass through holes in the brackets and crossarms, and then nuts are used for tightening. However, bolts can fall out during installation, requiring the use of spare bolts, which slows down the installation process. Furthermore, after the bolt passes through the through hole, the bolt head must be held in place by hand before tightening the nut, making the operation inconvenient. Existing technologies also include some devices for fixing cables on transmission towers, such as a cable fixing device for transmission towers disclosed in Chinese invention patent CN116706817A and a cable clamp for easy fixing on towers disclosed in CN117096806A. Although these cable fixing devices have good performance, their structures are relatively complex, which increases costs. Utility Model Content

[0003] This utility model addresses the problem of inconvenient installation of cable fixing devices when fixing cables on transmission line towers, by providing a simple and easy-to-install cable fixing device for transmission line towers.

[0004] To solve the above-mentioned technical problems, this utility model includes a support fixedly installed on a tower, on which a cable clamp for fixing cables is installed. Its structural feature is that the support includes a support mounting part for fixing the support to the tower and a cable clamp mounting part for installing the cable clamp onto the support. The support mounting part includes a support fixing plate disposed near the tower, and the cable clamp mounting part includes a cable clamp fixing plate disposed on the side of the support fixing plate away from the tower. Both sides of the cable clamp fixing plate are fixedly connected to the support fixing plate via connecting plates. The mounting plate, the cable clamp mounting plate, and the connecting plate surround each other to form an operating space for installing the cable clamp. An outwardly extending bolt limiting plate is fixedly connected to the outer side of the connecting plate. The bolt limiting plate is located on the side of the mounting plate away from the tower. The support is fixedly installed on the tower by a first bolt and a first nut. The stud of the first bolt passes through the bolt limiting plate and the mounting plate in sequence. The first nut is screwed to the end of the first bolt that protrudes from the mounting plate. A blocking member is provided between the bolt limiting plate and the mounting plate to prevent the stud of the first bolt from coming out of the mounting plate.

[0005] With the above structure, when installing the cable fixing device on the tower, first unscrew the first nut from the first bolt. Since the blocking component prevents the stud of the first bolt from coming out of the support fixing plate, and the stud of the first bolt passes through the bolt limiting plate before passing through the support fixing plate, the stud of the first bolt still comes out from the support fixing plate, and the first bolt will not fall off the support. Then, insert the stud part of the first bolt that comes out from the support fixing plate into the corresponding installation position on the tower. After the first bolt is inserted into the tower, fix the support with one hand and screw the first nut onto the first bolt with the other hand. At this time, the support is pre-fixed and will not fall off the tower. Then, tighten the first nut with a tool, and the support installation is complete. When fixing the cable, pass the cable through the cable clamp and fix the cable. This utility model discloses a cable fixing device for transmission line towers. The support is fixedly installed on the tower by a combination of bolts and nuts, and its installation method is the same as that of the prior art. The main structure of the support consists of a support fixing plate, a bolt limiting plate, a line clamp fixing plate, and a connecting plate. The structure is simple. A blocking element is provided between the bolt limiting plate and the support fixing plate to prevent the first bolt from coming out of the support fixing plate. This also prevents the first bolt from falling off the support during installation. Therefore, after the first bolt is inserted into the installation position on the tower, there is no need to hold the first bolt with your hand, which makes the fixing and installation of the support more convenient and can improve the installation speed.

[0006] The support fixing plate, bolt limiting plate, and wire clamp fixing plate are parallel to each other.

[0007] The blocking component is a limiting nut that is threadedly connected to the stud of the first bolt.

[0008] The support fixing plate has a long hole through which the first bolt can pass.

[0009] The cable clamp includes two arc-shaped pressure plates that can clamp the cable, and the cable clamp is fixedly installed on the cable clamp fixing plate by a combination of bolts and nuts.

[0010] The cable clamp has cable auxiliary support frames on both sides to support the cable passing through it, and the cable auxiliary support frames are fixedly connected to the cable clamp fixing plate.

[0011] This utility model discloses a cable fixing device for transmission line towers. The support is formed by the fixed connection of a support mounting part and a line clamp mounting part. The support fixing plate and bolt limiting plate of the support mounting part are parallel to each other with the line clamp fixing plate of the line clamp mounting part. The line clamp fixing plate is fixedly connected to the support fixing plate through a connecting plate. The bolt limiting plate is fixedly connected to the connecting plate. The support has an overall frame structure, which is simple in structure. A limiting nut is screwed onto the first bolt to prevent the first bolt from falling off the support. The support does not need to be held against the first bolt by hand during installation, which is convenient and can improve the installation speed. Cable auxiliary support frames are provided on both sides of the line clamp. When the cable passes through the cable auxiliary support frame and the arc-shaped pressure plate, the cable auxiliary support frame provides support for the cable, which facilitates the clamping and fixing of the cable. Attached Figure Description

[0012] Figure 1 This is a side view of the cable fixing device of this utility model;

[0013] Figure 2 for Figure 1 View from direction A;

[0014] Figure 3 for Figure 2 A schematic diagram of the CC cross-section;

[0015] Figure 4 for Figure 1 Enlarged view of point B;

[0016] Figure 5(a) is a schematic diagram of the side structure of the support;

[0017] Figure 5(b) is a view from direction D of Figure 5(a);

[0018] Figure 5(c) is the E-direction view of Figure 5(a);

[0019] Figure 6 A side view of the cable fixing device after setting cable auxiliary support frames on both sides of the online card;

[0020] Figure 7 for Figure 6 F-direction view;

[0021] Figure 8(a) is a schematic diagram of the first bolt being inserted into the tower and the first nut not being screwed into the first bolt during the installation of the support;

[0022] Figure 8(b) is a schematic diagram showing the first nut screwed onto the first bolt;

[0023] Figure 9(a) is a schematic diagram of a cable passing through an arc-shaped pressure plate without being clamped.

[0024] Figure 9(b) is a schematic diagram of the cable being clamped by the arc-shaped pressure plate;

[0025] In the diagram: 1. Support; 11. Support mounting part; 111. Support fixing plate; 112. Bolt limiting plate; 113. Elongated hole; 114. First through hole; 12. Cable clamp mounting part; 121. Cable clamp fixing plate; 122. Connecting plate; 123. Second through hole; 2. First bolt; 21. First flat washer; 3. First nut; 31. First elastic washer; 4. Limiting nut; 5. Cable clamp; 51. Arc-shaped pressure plate; 52. Side lug; 521. Third through hole; 53. Intermediate connecting piece; 531. Fourth through hole; 6. Second bolt; 61. Second flat washer; 7. Second nut; 71. Second elastic washer; 8. Cable auxiliary support frame; 100. Support plate; 200. Cable. Detailed Implementation

[0026] Reference Figure 1 -9. A cable fixing device for a power transmission line tower includes a support 1, which is detachably and fixedly installed on the tower. A cable clamp 5 is installed on the support 1 to fix an overhead cable 200. The support 1 includes a support mounting part 11 and a cable clamp mounting part 12, which are fixedly connected. The support 1 is fixedly installed on the tower via the support mounting part 11, and the cable 200 is installed on the support 1 via the cable clamp mounting part 12. The support 1 is installed on the tower using bolts and nuts, and the cable clamp 5 is installed on the cable clamp mounting part 12 using bolts and nuts. The tower body is not part of this invention and is not shown in the figure.

[0027] Reference Figure 1 -9, the support mounting part 11 includes a support fixing plate 111, which is located close to the tower. During installation, the support fixing plate 111 is usually in direct contact with the tower. The line clamp mounting part 12 includes a line clamp fixing plate 121, which is located on the side of the support fixing plate 111 away from the tower. The support fixing plate 111 has two sides, one side in contact with the tower and the other side facing away from the tower. In this utility model, the side of the support fixing plate 111 away from the tower refers to the side of the support fixing plate 111 facing away from the tower. The two sides of the line clamp fixing plate 121 are fixedly connected to the support fixing plate 111 by connecting plates 122, such as... Figure 1As shown, the connecting plate 122 is perpendicular to the support fixing plate 111. Alternatively, the connecting plate 122 can be connected to the support fixing plate 111 at an angle. The support fixing plate 111, the wire clamp fixing plate 121, and the connecting plate 122 together form an operating space for installing the wire clamp 5. When fixing the wire clamp 5, the bolts and nuts are tightened within this operating space. The length of the connecting plate 122 is designed according to the actual situation to ensure that the operating space between the wire clamp fixing plate 121 and the support fixing plate 111 meets the installation requirements. Both connecting plates 122 have outwardly protruding bolt limiting plates 112 fixedly connected to their outer sides. The term "extending outward" refers to the bolt limiting plate 112 extending outward from the operating space. The bolt limiting plate 112 is located on the side of the support fixing plate 111 away from the tower, that is, the bolt limiting plate 112 and the wire clamp fixing plate 121 are located on the same side of the support fixing plate 111. The support 1 is fixedly installed on the tower by the first bolt 2 and the first nut 3. The stud of the first bolt 2 passes through the bolt limiting plate 112 and the support fixing plate 111 in sequence. The head of the first bolt 2 cannot pass through the bolt limiting plate 112. The first nut 3 is screwed to the end of the first bolt 2 that protrudes from the support fixing plate 111. A blocking member is provided between the bolt limiting plate 112 and the support fixing plate 111 to prevent the stud of the first bolt 2 from coming out of the support fixing plate 111. That is, when the stud of the first bolt 2 passes through the support fixing plate 111, the blocking member can prevent the stud of the first bolt 2 from returning through the support fixing plate 111, so that the free end of the stud of the first bolt 2 is exposed from the surface of the support fixing plate 111, which is convenient for screwing with the first nut 3. Specifically, the bolt limiting plate 112 has a first through hole 114 through which the stud of the first bolt 2 can pass, and the support fixing plate 111 has a through hole 114 for connecting with the first nut 3. The through hole 114 corresponds to the elongated hole 113, through which the stud of the first bolt 2 can pass. The elongated hole 113 allows the first bolt 2 to swing to a certain extent, facilitating its insertion into the corresponding mounting hole on the tower. A first flat washer 21 is provided on one side of the head of the first bolt 2, and a first elastic washer 31 is provided on one side of the first nut 3. The blocking element is a limiting nut 4 threadedly connected to the stud of the first bolt 2. The limiting nut 4 cannot pass through the first through hole 114 and the elongated hole 113, preventing the first bolt 2 from falling off. The position of the limiting nut 4 on the stud of the first bolt 2 is adjustable. Figure 4 As shown, the gap between the head of the first bolt 2 and the limiting nut 4 is greater than the thickness of the bolt limiting plate 112, so the head of the first bolt 2 and the limiting nut 4 do not press against the bolt limiting plate 112. When the support 1 is first installed, the first bolt 2 can move, which makes it easy for the first bolt 2 to be inserted into the mounting hole on the tower.

[0028] Reference Figure 1-9, the support fixing plate 111, bolt limiting plate 112, and wire clamp fixing plate 121 are parallel to each other. The wire clamp 5 includes at least one arc-shaped pressure plate 51 that can clamp the cable 200. An insulation layer can be provided on the contact surface between the arc-shaped pressure plate 51 and the cable 200. There are two arc-shaped pressure plates 51 in the figure. The two arc-shaped pressure plates 51 are connected by an intermediate connecting piece 53. The outer ends of the two arc-shaped pressure plates 51 are provided with outwardly protruding side lugs 52. The wire clamp 5 is fixedly installed on the wire clamp fixing plate 121 by a combination of bolts and nuts. Specifically, the wire clamp 5 is installed and fixed by three sets of second bolts 6 and second nuts 7. The side lugs 52 are provided with a third through hole 521 through which the stud of the second bolt 6 can pass. The intermediate connecting piece 53 is provided with The stud of the second bolt 6 can pass through the fourth through hole 531. The wire clamp fixing plate 121 has a second through hole 123 that corresponds one-to-one with the third through hole 521 and the fourth through hole 531. The stud of the second bolt 6 can pass through the second through hole 123. The stud of the second bolt 6 first passes through the side lug 52 or the intermediate connecting piece 53, and then passes through the wire clamp fixing plate 121. Then the second nut 7 is screwed onto the second bolt 6, thereby fixing the wire clamp 5 on the wire clamp fixing plate 121. A second flat washer 61 is provided on one side of the head of the second bolt 6, and a second elastic washer 71 is provided on one side of the second nut 7. Figure 6 , 7 The cable fixing device shown has cable auxiliary support frames 8 on both sides of the cable clamp 5. The two sides of the cable clamp 5 are the sides of the cable clamp 5 along the length of the cable 200. The cable 200 passes through the cable clamp 5 and also passes through the cable auxiliary support frame 8. The cable auxiliary support frame 8 can support the cable 200. The cable auxiliary support frame 8 is fixedly connected to the cable clamp fixing plate 121. The cable auxiliary support frame 8 can be designed as a rectangle with an opening on one side, and the open end of the rectangle is welded to the cable clamp fixing plate 121.

[0029] Installation process: Figure 1-3Taking the cable fixing device shown as an example, the cable 200 is fixed below the crossarm of the tower head. The support 1 is fixedly installed on the support plate 100 of the tower, as shown in Figures 8(a), 8(b), 9(a), and 9(b). Before installation, the first nut 3 is unscrewed and the first elastic washer 31 is removed. More commonly, the first bolt 2 is installed on the support 1, but the first nut 3 and the first elastic washer 31 are not pre-installed on the first bolt 2. The first nut 3 and the first elastic washer 31 are installed in their respective storage positions. When the support 1 is connected to the support plate 100, the stud of the first bolt 2 is aligned with... Insert the first bolt 2 into the mounting hole on the support plate 100. To facilitate insertion, the first bolt 2 can be slightly wiggled. After the stud of the first bolt 2 passes through the support plate 100, put the first elastic washer 31 onto the first bolt 2, and then screw the first nut 3 onto the first bolt 2. Since the limiting nut 4 can prevent the first bolt 2 from coming out of the support fixing plate 111 through the elongated hole 113, it is not necessary to hold the first bolt 2 with your hand to prevent it from coming out of the support fixing plate 111 when installing the first elastic washer 31 and the first nut 3. This makes the installation more convenient and can improve the installation speed. Finally, tighten the first nut 3 with a tool. The support 1 is now installed. When fixing cable 200, first loosen the second nut 7, but do not unscrew it from the second bolt 6, so that the cable clamp 5 can move. Of course, the second nut 7 can also be screwed onto the second bolt 6 without being tightened. Pass cable 200 through the arc-shaped pressure plate 51 of the cable clamp 5, so that cable 200 is between the arc-shaped pressure plate 51 and the cable clamp fixing plate 121. Then use a tool to tighten the second nut 7 so that the arc-shaped pressure plate 51 presses the cable 200 tightly.

[0030] The cable fixing device for transmission line towers of this utility model has a frame structure for the support, which is simple in structure. The installation and fixing of the support and the clamping and fixing of the cable are carried out using a combination of bolts and nuts, which is the same as the conventional installation method. The limit nut prevents the first bolt from falling off the support, making the fixing and installation of the support more convenient and quick. The cable is fixed by the cable clamp, and the cable clamp has cable auxiliary support frames on both sides to support the cable. Tightening the second nut to clamp the cable is more labor-saving.

Claims

1. A cable fixing device for a power transmission tower, comprising a support (1) fixedly installed on the tower, a wire clamp (5) for fixing a cable (200) being installed on the support (1), characterized in that, The support (1) comprises a support mounting portion (11) for fixing the support (1) to the tower and a line card mounting portion (12) for mounting the line card (5) to the support (1), the support mounting portion (11) comprises a support fixing plate (111) arranged close to the tower, the line card mounting portion (12) comprises a line card fixing plate (121), the line card fixing plate (121) is arranged on the side of the support fixing plate (111) away from the tower, the two sides of the line card fixing plate (121) are fixedly connected with the support fixing plate (111) through connecting plates (122), the support fixing plate (111), the line card fixing plate (121) and the connecting plates (122) surround an operation space for mounting the line card (5), the outer side of the connecting plate (122) is fixedly connected with a bolt limiting plate (112) extending outward, the bolt limiting plate (112) is arranged on the side of the support fixing plate (111) away from the tower, the support (1) is fixedly mounted on the tower through a first bolt (2) and a first nut (3), the stud of the first bolt (2) penetrates through the bolt limiting plate (112) and the support fixing plate (111) in sequence, the first nut (3) is screwed with the end of the first bolt (2) penetrating out of the support fixing plate (111), a blocking piece is arranged between the bolt limiting plate (112) and the support fixing plate (111) to prevent the stud of the first bolt (2) from coming out of the support fixing plate (111).

2. The cable securing device of claim 1, wherein: The support fixing plate (111), the bolt limiting plate (112) and the line card fixing plate (121) are parallel to each other.

3. The cable securing device of a power transmission line tower according to claim 1, characterized in that: The blocking piece is a limiting nut (4) threadedly connected with the stud of the first bolt (2).

4. The cable securing device of a power transmission line tower of claim 1, wherein: A long hole (113) through which the first bolt (2) can penetrate is formed in the support fixing plate (111).

5. The cable securing device of a power transmission line tower of claim 1, wherein: The line card (5) comprises two arc-shaped pressing plates (51) capable of pressing the cable (200), and the line card (5) is fixedly mounted on the line card fixing plate (121) through a bolt-nut combination.

6. The cable securing device of a power transmission line tower of claim 1, wherein: Cable auxiliary support frames (8) for supporting the cable (200) penetrating the line card (5) are arranged on the two sides of the line card (5), and the cable auxiliary support frames (8) are fixedly connected with the line card fixing plate (121).

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