A cable laying auxiliary traction device

Abstract

The utility model discloses a kind of cable laying auxiliary traction devices, the traction fastener of cable end portion is sleeved, the traction fastener is outer wire pipe shape structure, and the outer edge of the pipe shape structure is equipped with threaded outer wire;Traction bearing is sleeved in traction fastener outer ring, and traction bearing diameter is greater than cable diameter;Traction head inner wall is equipped with the inner wire compatible with threaded outer wire, after traction bearing is sleeved, traction head is fixedly connected with traction fastener by thread.This application is equipped with traction fastener, so that traction fastener is sleeved with cable end portion, then traction bearing, traction head are sequentially sleeved on fastener.Construction, it can be moved by traction cable through traction head, simultaneously, ball on traction bearing rolls in movable groove, drives cable to move along, can effectively reduce the friction of cable in moving process, protect cable.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary installation technology for building electrical cable laying, and in particular to an auxiliary traction device for cable laying. Background Technology

[0002] With the rapid development of underground power cable laying projects, higher requirements have been put forward for cable protection. Cable duct laying is an underground cable laying method that forms a duct bundle system by pre-burying multiple protective pipes. It is mainly used in urban roads, dense underground pipe networks and other occasions where it is not suitable to build cable trenches and tunnels.

[0003] The basic process for laying cables in existing concealed conduits mainly includes: 1. Pre-burying the conduit: During concrete pouring, the conduit is pre-buried in the wall or floor slab, with a pull wire or iron wire pre-installed inside; 2. Determining the wiring path according to the construction drawings, fixing the twisted-pair cable to the pull end of the information socket, and pulling the cable into the telecommunications room using a pull rope at the other end of the conduit. However, in actual use, the increased number of pull rope and cable traction binding points increases the cable cross-section, and the force on the traction parts of the cable traction binding points causes the cable head to scrape against the inner wall of the conduit, increasing the friction of cable traction and making the cable laying process more difficult.

[0004] Therefore, developing a method to effectively reduce friction during cable laying and protect the cable is one of the important problems that needs to be solved in the current cable laying and traction process. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a cable laying auxiliary traction device to reduce the friction of the cable end during the traction process.

[0006] To solve the above problems, the present invention adopts the following technical solution: a cable laying auxiliary traction device, comprising a traction fastener sleeved on the end of the cable, wherein the traction fastener is an external threaded tubular structure with external threads on the outer edge of the tubular structure; a traction bearing sleeved on the outer ring of the traction fastener, wherein the diameter of the traction bearing is larger than the diameter of the cable; and an inner thread adapted to the external thread on the inner wall of the traction head. After the traction bearing is sleeved, the traction head and the traction fastener are fixedly connected by threads.

[0007] Furthermore, the traction end of the traction head is spherical.

[0008] Furthermore, a hook is provided at the end of the traction head, and the hook is welded and fixed to the spherical surface.

[0009] Furthermore, the traction fastener has four or more openings axially on the pipe wall.

[0010] Furthermore, the traction bearing is composed of a first semi-circular ring and a second semi-circular ring spliced ​​together. The outer edges of the first semi-circular ring and the second semi-circular ring are provided with movable grooves, and ball bearings are provided in the movable grooves, where the ball bearings roll.

[0011] Furthermore, the depth of the active groove is 1 / 3 of the diameter of the ball.

[0012] Furthermore, in the first and second semicircular rings, each semicircular ring has grooves at both ends, and the other semicircular ring has a protrusion that matches the shape of the groove. The protrusion is inserted into the groove so that the two semicircular rings are joined together to form a complete ring.

[0013] Furthermore, the convex groove is provided with a pin positioning hole. After the convex groove is inserted into the groove, the pin positioning hole overlaps with the positioning hole on the semi-circular ring. Inserting the pin fixes the relative position of the two semi-circular rings.

[0014] Furthermore, a positioning ring is set at the bottom of the traction fastener, and the positioning ring is used to position the traction bearing.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0016] 1. This application uses a traction fastener, which is fitted onto the end of the cable. A traction bearing and a traction head are then sequentially fitted onto the fastener. During construction, the cable can be moved by the traction head. Simultaneously, the balls on the traction bearing roll within the movable groove, causing the cable to move accordingly. This effectively reduces friction on the cable during movement and protects the cable.

[0017] 2. The traction bearing of this application is made up of two semicircles spliced ​​together. In complex environments, repeated traction and dragging can easily cause damage to the bearing. The splicing of two semicircles can ensure the bearing's performance. If either semicircle is damaged, a new semicircle can be used to replace it and splice it into a new traction bearing, which can effectively reduce the production and maintenance costs of the traction device.

[0018] 3. The traction head end provided in this application has a semi-circular structure, and the spherical surface can reduce traction friction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cable laying traction device of this utility model;

[0020] Figure 2 This is a schematic diagram of the middle part of the traction bearing of this utility model;

[0021] Figure 3 This is a schematic diagram of the traction bearing structure of this utility model;

[0022] Figure 4This is a schematic diagram of the connection structure between the traction device and the cable of this utility model.

[0023] In the diagram: 1. Traction fastener, 2. Traction bearing, 3. Traction head, 11. Fastening ring, 21. First semi-circular ring, 22. Second semi-circular ring, 23. Groove, 24. Protrusion, 25. Pin positioning hole, 26. Ball bearing, 31. Hook. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1 As shown, this application provides a cable laying auxiliary traction device, including a traction fastener 1 fitted onto the end of the cable. The traction fastener 1 is an externally threaded tubular structure with external threads on its outer edge. A traction bearing 2 is fitted onto the outer ring of the traction fastener 1, and the diameter of the traction bearing 2 is larger than the diameter of the cable. The inner wall of the traction head 3 is provided with internal threads adapted to the external threads. After the traction bearing 2 is fitted, the traction head 3 and the traction fastener 1 are fixedly connected to the device by threads. A hook 31 is provided on the traction head 3. By using the traction fastener 1, the traction fastener 1 is fitted onto the end of the cable, and then the traction bearing 2 and the traction head 3 are sequentially fitted onto the fastener. During construction, the cable can be moved by pulling the traction head 3. At the same time, the balls 26 on the traction bearing 2 roll in the movable groove, driving the cable to move accordingly, which can effectively reduce the friction of the cable during movement and protect the cable.

[0027] In some embodiments, the traction bearing 2 provided in this application is composed of a first semi-circular ring 21 and a second semi-circular ring 22 spliced ​​together. The outer edges of the first semi-circular ring 21 and the second semi-circular ring 22 are provided with movable grooves, and ball bearings 26 are provided in the movable grooves. The ball bearings 26 roll in the movable grooves. The depth of the movable grooves is 1 / 3 of the diameter of the ball bearings 26.

[0028] The ball bearing 26 rolls in the movable groove, causing the end of the cable connected to it to move accordingly; this can effectively reduce the friction of the cable during movement.

[0029] It should be noted that, since the traction bearing 2 frequently rubs against the pipeline or surrounding environment during traction, the balls 26 or the bearing itself are at high risk of damage. However, replacing the entire bearing is costly and not economically efficient. To solve the above problems, in some preferred embodiments, the traction bearing 2 provided in this application has a first semi-circular ring 21 and a second semi-circular ring 22, wherein each semi-circular ring has grooves 23 at both ends, and the other semi-circular ring has a protrusion 24 that matches the shape of the groove 23. The protrusion 24 is inserted into the groove 23 so that the two semi-circular rings are spliced ​​into a complete ring.

[0030] To further improve the ease of assembly and disassembly of the two semi-circular rings, the protrusion 24 is further provided with a pin positioning hole 25. After the protrusion 24 is inserted into the groove 23, the pin positioning hole 25 overlaps with the positioning hole on the semi-circular ring. The pin is inserted to fix the relative position of the two semi-circular rings.

[0031] In some preferred embodiments, the traction fastener 1 provided in this application has a fastening ring 11 at its bottom, which is used to position the traction bearing 2. Since the cable is usually pulled in one direction during the traction process, there is a risk that the traction bearing 2 may slip off and detach from the traction fastener 1 during the traction process. In order to improve the structural stability of the traction device, a fastening ring 11 is provided at the bottom of the traction fastener 1.

[0032] When using it, cut the cable to be laid to the preset length and then use plastic film to temporarily seal the cable head.

[0033] The traction fastener 1 of this application is inserted into the cable, followed by the traction bearing 2. Then, the traction head 3 is placed on the end of the cable, and then the traction head 3 is connected and fixed to the end of the cable by the threaded connection between the traction fastener 1 and the traction head 3. Since the outer wall of the traction fastener 1 has an axial gap, it will be squeezed inward with the shape of the traction head 3 during the threaded connection process, and finally the cable is tightened, so that the traction device is connected to the cable.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable laying auxiliary traction device, characterized in that, A traction fastener (1) is fitted onto the end of the cable. The traction fastener (1) is a tubular structure with external threads on its outer edge. A traction bearing (2) is fitted onto the outer ring of the traction fastener (1). The diameter of the traction bearing (2) is larger than the diameter of the cable. The inner wall of the traction head (3) is provided with an inner thread that matches the external threads. After the traction bearing (2) is fitted, the traction head (3) and the traction fastener (1) are fixedly connected by threads.

2. The cable laying auxiliary traction device according to claim 1, characterized in that, The traction end of the traction head (3) is spherical.

3. A cable laying auxiliary traction device according to claim 2, characterized in that, The traction head (3) is provided with a hook (31) at its end, and the hook (31) is welded and fixed to the spherical surface.

4. The cable laying auxiliary traction device according to claim 1, characterized in that, The traction fastener (1) has more than 4 openings axially on the pipe wall.

5. A cable laying auxiliary traction device according to claim 1, characterized in that, The traction bearing (2) is spliced ​​from a first semi-circular ring (21) and a second semi-circular ring (22). The outer edges of the first semi-circular ring (21) and the second semi-circular ring (22) are provided with movable grooves, and ball bearings (26) are provided in the movable grooves. The ball bearings (26) roll in the movable grooves.

6. The cable laying auxiliary traction device according to claim 5, characterized in that, The depth of the active groove is 1 / 3 of the diameter of the ball (26).

7. The cable laying auxiliary traction device according to claim 5, characterized in that, The first semicircular ring (21) and the second semicircular ring (22) are provided with grooves (23) at both ends of either semicircular ring, and the other semicircular ring is provided with a convex groove (24) that matches the shape of the groove (23). The convex groove (24) is inserted into the groove (23) so that the two semicircular rings are spliced ​​together to form a complete ring.

8. The cable laying auxiliary traction device according to claim 7, characterized in that, The groove (24) is provided with a pin positioning hole (25). After the groove (24) is inserted into the groove (23), the pin positioning hole (25) overlaps with the positioning hole on the semi-circular ring. The pin is inserted to fix the relative position of the two semi-circular rings.

9. A cable laying auxiliary traction device according to claim 1, characterized in that, The bottom of the traction fastener (1) is set with a positioning ring, which is used to position the traction bearing (2).

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