Cable laying auxiliary device

Abstract

The invention discloses a cable laying auxiliary device, which is used for laying a cable in a cable duct bank, and comprises two sleeves, a ball and a tooth-shaped structure, one end of the sleeve can be inserted into the orifice of the cable duct bank, the other end of the sleeve is flared, and the outer diameter is larger than that of the orifice of the cable duct bank; the sleeve is rotationally connected with a plurality of balls along the inner circumference; the tooth-shaped structure is arranged on the outer side of the insertion end of at least one sleeve, and the tooth tip of the tooth-shaped structure is back on to the axis of the sleeve. The invention provides a cable laying auxiliary device which is suitable for being used at a pipe opening of a calandria with a small inner diameter.

Description

Technical Field

[0001] The present invention relates to the technical field of cable laying, and in particular to a cable laying auxiliary device. Background Art

[0002] Existing cable conduits are often cast with materials with high friction such as cement. When laying cables, the cables need to pass through the cable conduits and be dragged forward. The inlet and outlet of the cable conduits cause serious wear and tear on the cables. In order to protect the cables, cable laying auxiliary devices are installed at the inlet and outlet of the cable conduits.

[0003] Existing cable laying assist devices, such as patent application number CN2020206638182, include a telescopic rod, a support tube, and multiple bull's eye balls rotatably connected to the inner wall of the support tube. When used within a conduit, the lower end of the telescopic rod is fixed to the lower wall of the conduit, while the support tube is attached to its upper end. The cable passes through the support tube. As the cable is pulled, the bull's eye balls roll, reducing resistance to the cable's movement.

[0004] Although the existing cable laying auxiliary device reduces the forward resistance of the cable, it is large in size and is not suitable for use at the pipe opening of the drainage pipe with a smaller inner diameter. Summary of the Invention

[0005] In order to solve the shortcoming that the existing cable laying auxiliary device is not suitable for use with the pipe opening of the drainage pipe with a smaller inner diameter, the present invention proposes a cable laying auxiliary device suitable for use with the pipe opening of the drainage pipe with a smaller inner diameter.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A cable laying auxiliary device is used to lay cables in cable conduits. The laying auxiliary device includes: two sleeves, balls and a toothed structure; the two sleeves are used to be installed at the pipe openings at both ends of the cable conduit, one end of the sleeve can be inserted into the pipe opening of the cable conduit, and the other end of the sleeve is expanded and has an outer diameter larger than the pipe opening of the cable conduit; the sleeve is connected to a plurality of balls for rotation along the inner circumference; the toothed structure is arranged on the outside of the insertion end of at least one sleeve, and the tooth tip of the toothed structure is facing away from the axis of the sleeve.

[0007] Through the above-mentioned setting, the laying auxiliary device of the present application can be inserted into the pipe mouth of the cable drain pipe with a smaller outer diameter for use, so as to reduce the wear of the pipe mouth of the cable drain pipe on the cable; one end of the sleeve is expanded to prevent the laying auxiliary device from being brought into the cable drain pipe by the cable; and the toothed structure can prevent the laying auxiliary device from being brought out of the cable drain pipe by the cable.

[0008] Furthermore, the sleeve includes a connecting structure and two half-tube bodies, and the two half-tube bodies are connected by the connecting structure to form the above-mentioned sleeve.

[0009] The above arrangement facilitates the installation of the ball bearings; in addition, it also facilitates the installation of the laying auxiliary device on the cable.

[0010] Furthermore, the connecting structure includes a hinge and a bolt. One side of the half tube is hinged to one side of the other half tube through the hinge. The other side of the half tube is threadedly connected to the bolt. The end of the bolt can push the other side of the other half tube to stretch the two half tubes apart and fit tightly against the inner wall of the cable duct.

[0011] With the above arrangement, the sleeve can be pressed against the inner wall of the cable conduit by rotating the bolt, further preventing the sleeve from falling out of the cable conduit.

[0012] Furthermore, the tooth-shaped structure is fixedly connected to the outer side of the insertion end of the sleeve, and the tooth tips of the tooth-shaped structure are perpendicularly facing away from the axis of the sleeve.

[0013] Furthermore, a weight-reducing hole is provided on the sleeve.

[0014] Through the above arrangement, the weight of the casing is reduced.

[0015] Furthermore, a plurality of weight-reducing holes are provided, and are arranged in sequence along the circumference of the sleeve. The tooth-shaped structure includes a tooth-shaped plate provided in the plurality of weight-reducing holes. One end of the tooth-shaped plate is rotatably connected in the weight-reducing hole, and a tooth tip is provided at the other end of the tooth-shaped plate, and is inclined toward the flared end of the sleeve. The laying auxiliary device also includes an elastic member, which is installed on the sleeve to help the tooth-shaped plate to reset.

[0016] Through the above-mentioned arrangement, the installation convenience of the laying auxiliary device is increased, and it can be adapted to cable conduits with different inner diameters.

[0017] Furthermore, the elastic part includes: a sliding sleeve, a connecting rod and a spring; the sliding sleeve is arranged on the outside of the sleeve and is located on the side of the toothed piece close to the flared end of the sleeve; one end of the connecting rod is hinged to the sliding sleeve, and the other end of the connecting rod is hinged to the toothed piece, and the sliding sleeve slides axially along the sleeve to drive the toothed piece to rotate inward or outward; the spring is sleeved on the outside of the sleeve, one end of the spring is connected to the sleeve, and the other end of the spring is connected to the sliding sleeve.

[0018] Through the above arrangement, it is convenient to control the rotation of the toothed piece to remove the sleeve from the cable conduit.

[0019] Furthermore, a sliding groove is provided along the outer periphery of the sleeve, the sliding sleeve is slidably connected in the sliding groove, the outer side of the sliding sleeve is flush with the outer wall of the sleeve, the spring is provided in the sliding groove, one end of the spring close to the flared end of the sleeve is connected to the end of the sliding groove, and the other end of the spring is connected to the sliding sleeve.

[0020] Through the above arrangement, the sliding groove accommodates the sliding sleeve and the spring, preventing the sliding sleeve and the spring from increasing the external dimensions of the insertion end of the laying auxiliary device and preventing the laying auxiliary device from being affected when being inserted into the cable conduit.

[0021] Furthermore, a reinforcing rib is fixedly connected to the outer side of the flared end of the sleeve.

[0022] Through the above arrangement, the strength of the casing is increased.

[0023] Furthermore, the insertion end of the sleeve and the inner side of the flared end are both rotatably connected with balls.

[0024] Through the above arrangement, the uniformity of ball arrangement is increased, thereby further reducing cable wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the laying auxiliary device of the embodiment Figure 1 .

[0026] Figure 2 An axial view of a laying auxiliary device according to an embodiment.

[0027] Figure 3 2 is a cross-sectional view of a laying auxiliary device according to an embodiment.

[0028] Figure 4 Schematic diagram of the laying auxiliary device of the embodiment Figure 2 .

[0029] Figure 5 This is a schematic diagram of an embodiment in which the laying auxiliary device is installed at both ends of the cable conduit.

[0030] Figure 6 A schematic diagram of a laying auxiliary device according to another embodiment.

[0031] Figure 7 for Figure 6 side view.

[0032] Figure 8 This is a schematic diagram of installing a laying auxiliary device into a cable conduit according to another embodiment. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0034] like Figures 1 to 5 As shown, a cable laying auxiliary device is used to lay cables in cable conduits, and the laying auxiliary device includes: two sleeves 3, balls 4 and a toothed structure 5; the two sleeves are used to be installed at the pipe openings at both ends of the cable conduit, one end of the sleeve 3 can be inserted into the pipe opening of the cable conduit, and the other end of the sleeve 3 is expanded, and the outer diameter is larger than the pipe opening of the cable conduit; the sleeve 3 is connected to a plurality of balls 4 along the inner circumference; the toothed structure 5 is arranged on the outside of the insertion end of at least one sleeve 3, and the tooth tip of the toothed structure 5 is facing away from the axis of the sleeve 3.

[0035] Through the above-mentioned settings, the laying auxiliary device of the present application can be inserted into the pipe mouth of a cable conduit with a smaller outer diameter for use, so as to reduce the wear of the pipe mouth of the cable conduit on the cable; one end of the sleeve 3 is expanded to prevent the laying auxiliary device from being brought into the cable conduit by the cable; and the toothed structure 5 can prevent the laying auxiliary device from being brought out of the cable conduit by the cable.

[0036] Specifically, the laying auxiliary device of the present application is suitable for use with a cable drain pipe with an inner diameter of less than 20 cm. The insertion end of the sleeve 3 is basically cylindrical and has an outer diameter of 17-19 cm. The flared end of the sleeve 3 is basically trumpet-shaped. When in use, a sleeve is installed at each end of the cable drain pipe. When installing, the insertion end of the sleeve 3 is inserted into the pipe mouth of the cable drain pipe, and the flared end of the sleeve 3 is located outside the cable drain pipe. Figure 5 As shown, the toothed structure 5 contacts the inner wall of the cable conduit, increasing the friction between the sleeve 3 and the cable conduit. The cable passes through the sleeve 3 and passes through the cable conduit, and the cable is pulled forward for laying. The cable passes over the ball bearing 4 and moves. The ball bearing 4 rotates to reduce the resistance of the cable movement and prevents the cable from directly contacting the pipe mouth of the cable conduit to reduce the wear of the pipe mouth of the cable conduit on the cable surface; the expansion of the sleeve 3 on the cable entry side can prevent the sleeve 3 from being brought into the cable conduit by the cable, and the toothed structure 5 on the sleeve 3 on the cable output side can prevent the sleeve 3 from being brought out of the cable conduit by the cable; in addition, the expansion of the sleeve 3 also acts as a funnel to guide the cable into the cable conduit, further reducing the wear on the cable surface. As an implementation method, a mounting groove is provided on the inner wall of the sleeve 3, a cover plate is installed on the inner side of the mounting groove, a mounting hole is provided on the cover plate, a rotating cavity is formed between the mounting groove and the mounting hole, the ball 4 rotates in the rotating cavity, the inner side of the ball 4 protrudes from the inner side of the cover plate to support the cable, and the cover plate prevents the ball 4 from falling out of the mounting groove.

[0037] As an implementation manner, the sleeve 3 includes a connecting structure 31 and two half-tube bodies 32 , and the two half-tube bodies 32 are connected by the connecting structure 31 to form the above-mentioned sleeve 3 .

[0038] The above arrangement facilitates the installation of the ball 4; in addition, it also facilitates the installation of the laying auxiliary device on the cable.

[0039] When manufacturing the laying auxiliary device of the present application, the two half-tubes 32 are separate structures. The balls 4 are first installed on the inner walls of the half-tubes 32, and then the two half-tubes 32 are assembled through the connecting structure 31 to form the sleeve 3. In addition, when threading the cable conduit, the cable is first passed through the cable conduit, and then the two half-tubes 32 of the laying auxiliary device are opened, the cable is placed between the two half-tubes 32, and the two half-tubes 32 are closed before the laying auxiliary device is installed at both ends of the cable conduit.

[0040] As an implementation method, the connecting structure 31 is configured as a hinge, and one side of the half-tube body 32 is hinged to one side of the other half-tube body 32 through the hinge. The other side of the half-tube body 32 is threadedly connected with a bolt 9, and the end of the bolt 9 can push the other side of the other half-tube body 32 to stretch the two half-tube bodies 32 apart and stick them tightly to the inner wall of the cable duct.

[0041] With the above arrangement, the sleeve 3 can be pressed against the inner wall of the cable conduit by rotating the bolt 9, further preventing the sleeve 3 from falling out of the cable conduit.

[0042] Specifically, the side of the half-tube 32 away from the hinge is fixedly connected to the outside with a support plate, the bolt 9 is threadedly connected to the support plate of one of the half-tubes 32, and the end of the bolt 9 is against the support plate of the other half-tube 32, as shown in FIG. Figure 4 As shown, in this application, when the two half-tubes 32 are completely closed, the sides of the half-tubes 32 away from the hinges fit together, and the support plates of the half-tubes 32 fit together with the support plates of the other half-tubes 32. At this time, the outer diameter of the sleeve 3 is the smallest, making it easy to insert the sleeve 3 into the cable conduit. After insertion, the bolt 9 is rotated, and the end of the bolt 9 pushes the support plates apart, increasing the distance between the two support plates, thereby driving the two half-tubes 32 to slowly open. After the outer diameter of the sleeve 3 gradually increases, the outer surface of the sleeve 3 is tightly attached to the inner wall of the cable conduit. Under the action of friction, the sleeve 3 is not easy to come out of the cable conduit. As an implementation method, the support plate is close to the flared end of the sleeve 3, making it easier for the operator to turn the bolt 9 outside the cable conduit.

[0043] As an implementation method, the toothed structure 5 is fixedly connected to the outer side of the insertion end of the sleeve 3 , and the tooth tips of the toothed structure 5 are perpendicularly facing away from the axis of the sleeve 3 .

[0044] Specifically, the toothed structure 5 is a toothed plate, the inner side of the toothed plate is welded to the outer side of the sleeve 3 along the circumference of the sleeve 3, and the outer side of the toothed plate is tooth-shaped. When the sleeve 3 is inserted into the cable conduit, the tooth tips of the toothed plate are against the inner wall of the cable conduit, thereby increasing the stability of the sleeve 3 in the cable conduit.

[0045] As an implementation method, a weight-reducing hole 6 is provided on the sleeve 3 .

[0046] Through the above arrangement, the weight of the sleeve 3 is reduced.

[0047] like Figures 6 to 8 As shown, in another embodiment, a plurality of weight-reducing holes 6 are provided, and are arranged in sequence along the circumference of the sleeve 3. The tooth-shaped structure 5 includes a tooth-shaped plate provided in the plurality of weight-reducing holes 6. One end of the tooth-shaped plate is rotatably connected to the weight-reducing hole 6. The other end of the tooth-shaped plate is provided with a tooth tip and is inclined toward the flared end of the sleeve 3. The laying auxiliary device also includes an elastic member 7, which is installed on the sleeve 3 to help the tooth-shaped plate to reset.

[0048] Through the above-mentioned arrangement, the installation convenience of the laying auxiliary device is increased, and it can be adapted to cable conduits with different inner diameters.

[0049] The sleeve 3 of the present application is an integrally formed structure. The extension direction of the weight-reducing hole 6 is parallel to the axis of the sleeve 3. The tooth-shaped piece is basically an isosceles triangle structure. The two ends of the bottom edge of the tooth-shaped piece are rotatably connected to the left and right sides of the weight-reducing hole 6. The tooth tip is located on the outside of the sleeve 3. Initially, as shown in FIG. Figure 7 As shown, the axis of the toothed piece and the sleeve 3 is basically 45 degrees, the elastic member 7 maintains the stability of the toothed piece, and the toothed piece can rotate around the bottom edge of the toothed piece. After releasing the hand, the elastic member 7 can reset the toothed piece; when installing the laying auxiliary device of the present application, directly insert the sleeve 3 into the cable conduit, such as Figure 8 As shown, the inner wall of the cable tube squeezes the toothed piece, and the angle between the toothed piece and the axis of the sleeve 3 becomes smaller. Under the action of the elastic member 7, the tooth tip of the toothed piece contacts the inner wall of the cable tube. The toothed piece is similar to a barb to prevent the sleeve 3 from being pulled out. The sleeve 3 of the present application can be inserted into cable tubes with different inner diameters. After the sleeve 3 is inserted, the toothed piece rotates adaptively so that the tooth tip contacts the inner wall of the cable tube.

[0050] As an implementation method, the elastic member 7 includes: a sliding sleeve 71, a connecting rod 72 and a spring 73; the sliding sleeve 71 is arranged on the outside of the sleeve 3 and is located on the side of the toothed piece close to the flared end of the sleeve 3; one end of the connecting rod 72 is hinged to the sliding sleeve 71, and the other end of the connecting rod 72 is hinged to the toothed piece, and the sliding sleeve 71 slides axially along the sleeve 3 to drive the toothed piece to rotate inward or outward; the spring 73 is sleeved on the outside of the sleeve 3, one end of the spring 73 is connected to the sleeve 3, and the other end of the spring 73 is connected to the sliding sleeve 71.

[0051] Through the above arrangement, it is convenient to control the rotation of the toothed piece so as to take the sleeve 3 out of the cable conduit.

[0052] In this application, initially, the elastic force of the spring 73 is zero, and the angle between the toothed piece and the axis of the sleeve 3 is basically 45°. When the sleeve 3 is inserted into the cable drain pipe, the inner wall of the cable drain pipe squeezes the toothed piece, causing the toothed piece to rotate inward, and the angle between the toothed piece and the axis of the sleeve 3 is slightly reduced. When the toothed piece rotates inward, the connecting rod 72 pushes the sleeve 71 to slide toward the flared end of the sleeve 3, and the spring 73 contracts. When the sleeve 3 needs to be removed, the finger is inserted into the weight-reducing hole 6, and the sleeve 71 is pulled outward. The spring 73 further contracts, and the sleeve 71 pulls the toothed piece inward through the connecting rod 72. After the tooth tip of the toothed piece is disengaged from the inner wall of the cable drain pipe, the sleeve 3 is removed from the cable drain pipe.

[0053] As an implementation method, a slide groove 8 is provided along the outer periphery of the sleeve 3, and the sliding sleeve 71 is slidably connected in the slide groove 8. The outer side of the sliding sleeve 71 is flush with the outer wall of the sleeve 3. The spring 73 is provided in the slide groove 8, and one end of the spring 73 close to the flared end of the sleeve 3 is connected to the end of the slide groove 8, and the other end of the spring 73 is connected to the sliding sleeve 71.

[0054] Through the above arrangement, the slide groove 8 accommodates the slide sleeve 71 and the spring 73, preventing the slide sleeve 71 and the spring 73 from increasing the external dimensions of the insertion end of the laying auxiliary device and preventing the laying auxiliary device from being affected in being inserted into the cable conduit.

[0055] As an implementation method, a reinforcing rib is fixedly connected to the outer side of the flared end of the sleeve 3 .

[0056] Through the above arrangement, the strength of the sleeve 3 is increased.

[0057] As an implementation method, the insertion end of the sleeve 3 and the inner side of the flared end are both rotatably connected with balls 4.

[0058] Through the above arrangement, the uniformity of the arrangement of the balls 4 is increased, thereby further reducing the wear of the cable.

[0059] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A cable laying auxiliary device, characterized in that: Used for laying cables in cable conduits, the laying auxiliary device comprises: Two sleeves, the two sleeves are used to be installed at the pipe openings at both ends of the cable pipe, one end of the sleeve can be inserted into the pipe opening of the cable pipe, and the other end of the sleeve is expanded and has an outer diameter larger than the pipe opening of the cable pipe; Balls, the sleeve is rotatably connected with a plurality of the balls along the inner circumference; A toothed structure is provided on the outside of the insertion end of at least one of the sleeves, and the tooth tips of the toothed structure are facing away from the axis of the sleeve.

2. A cable laying auxiliary device according to claim 1, characterized in that: The sleeve comprises a connecting structure and two half-tube bodies, and the two half-tube bodies are connected via the connecting structure to form the sleeve.

3. A cable laying auxiliary device according to claim 2, characterized in that: The connecting structure includes a hinge and a bolt. One side of the half-tube body is hinged to one side of the other half-tube body through the hinge. The other side of the half-tube body is threadedly connected with a bolt. The end of the bolt can push the other side of the other half-tube body to spread the two half-tube bodies apart and fit them tightly against the inner wall of the cable duct.

4. A cable laying auxiliary device according to claim 1, characterized in that: The toothed structure is fixedly connected to the outer side of the insertion end of the sleeve, and the tooth tips of the toothed structure are perpendicularly facing away from the axis of the sleeve.

5. A cable laying auxiliary device according to claim 1, characterized in that: The sleeve is provided with a weight-reducing hole.

6. A cable laying auxiliary device according to claim 5, characterized in that: There are multiple weight-reducing holes, which are arranged in sequence along the circumference of the sleeve. The toothed structure includes a toothed plate arranged in the multiple weight-reducing holes. One end of the toothed plate is rotatably connected in the weight-reducing hole. The other end of the toothed plate is provided with a tooth tip and is inclined toward the flared end of the sleeve. The laying auxiliary device also includes an elastic member, which is installed on the sleeve to help the toothed plate to reset.

7. A cable laying auxiliary device according to claim 6, characterized in that: The elastic member comprises: A sliding sleeve, wherein the sliding sleeve is arranged outside the sleeve and is located on a side of the toothed piece close to the flared end of the sleeve; A connecting rod, one end of which is hinged to the sliding sleeve, and the other end of which is hinged to the toothed piece, and the sliding sleeve slides axially along the sleeve to drive the toothed piece to rotate inward or outward; A spring is sleeved on the outside of the sleeve, one end of the spring is connected to the sleeve, and the other end of the spring is connected to the sliding sleeve.

8. A cable laying auxiliary device according to claim 7, characterized in that: A sliding groove is arranged along the outer circumference of the sleeve, the sliding sleeve is slidably connected in the sliding groove, the outer side of the sliding sleeve is flush with the outer wall of the sleeve, the spring is arranged in the sliding groove, one end of the spring close to the flared end of the sleeve is connected to the end of the sliding groove, and the other end of the spring is connected to the sliding sleeve.

9. A cable laying auxiliary device according to claim 1, characterized in that: A reinforcing rib is fixedly connected to the outer side of the expanded end of the sleeve.

10. A cable laying auxiliary device according to claim 1, characterized in that: the insertion end of the cannula, and The inner sides of the flared ends are rotatably connected with the balls.

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