A pipeline optical cable laying traction joint protection device

Abstract

A protection device for traction joints for laying optical cables in pipelines, comprising an outer tooth sleeve and an inner tooth sleeve, wherein the inner portion of the outer tooth sleeve is provided with a first conical hole with openings at both ends, wherein the inner tooth sleeve is connected in the first conical hole by means of threads, wherein the inner tooth sleeve comprises a tooth petal portion, a connecting portion and a pointed mouth portion from top to bottom, wherein the tooth petal portion comprises a plurality of tooth petals evenly distributed around a circumference and separated by notches. The protection device for traction joints for laying optical cables in pipelines uses the tooth petals to tightly bite the sheath of the optical cable, and when the cable guide pulls the optical cable, the force is transmitted to the device, so that the reinforcing core and the sheath are subjected to force synchronously, and can effectively prevent the optical cable core and the reinforcing core from peeling off or detaching during the pulling process.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cable laying devices, and in particular relates to a pipeline optical cable laying traction joint protection device. Background Art

[0002] Laying optical cables through pipelines is a commonly used method of laying optical cables. The optical cable is provided with a reinforcing core, a fiber core, and a sheath from the inside to the outside. The reinforcing core is located in the center of the optical cable, and the fiber cores are evenly distributed around the reinforcing core. The sheath is tightly sleeved on the outside of the fiber core for protection. In the prior art, when laying optical cables in pipelines, it is necessary to tie and connect the cable guide with the reinforcing core of the optical cable, and use the cable guide to pull the optical cable in the pipeline. During the traction process, it is very easy for the optical cable fiber core to peel off or detach from the reinforcing core, causing damage to the fiber core. Especially when laying optical cables in old pipelines, the obstruction of old pipelines is more likely to cause such problems. Therefore, it is necessary to provide a pipeline optical cable laying traction joint protection device. Summary of the invention

[0003] The purpose of the present invention is to provide a pipeline optical cable laying traction joint protection device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a pipeline optical cable laying traction joint protection device, comprising an outer gear sleeve and an inner gear sleeve, the outer gear sleeve is provided with a first conical hole opening at both ends, the inner gear sleeve is connected to the first conical hole by a thread, the inner gear sleeve comprises a tooth petal portion, a connecting portion and a pointed mouth portion from top to bottom, the tooth petal portion comprises a plurality of tooth petals evenly distributed around the circumference separated by a notch, the tooth petal portion and the connecting portion are provided with a second conical hole opening, the pointed mouth portion is provided with a third conical hole opening coaxial with the second conical hole opening, the second conical hole opening and the third conical hole opening make the inner gear sleeve a tubular structure with openings at both ends, when the tooth petals are close to each other under the action of the inner gear sleeve, the minimum diameter of the second conical hole opening is smaller than the diameter of the cable, the angle between the side wall of the third conical hole opening and the axis is greater than the angle between the second conical hole opening and the axis, and the inner wall of the tooth petal portion in the second conical hole opening is provided with biting teeth.

[0005] On the basis of the above solution and as a preferred solution of the above solution, the length of the inner gear sleeve is greater than that of the outer gear sleeve.

[0006] On the basis of the above solution and as a preferred solution of the above solution, the length of the outer gear sleeve is greater than the length of the tooth petal portion.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme, the length of the inner gear sleeve is 20 cm, the length of the tooth petal part is 12 cm, and the length of the outer gear sleeve is 15 cm.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme, the diameter of the opening of the third conical surface is larger than the diameter of the reinforcing core, and the diameter of the opening of the third conical surface is smaller than the diameter of the circle surrounded by the fiber core.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme, the outer shape of the outer gear sleeve is truncated cone-shaped.

[0010] On the basis of the above solution and as a preferred solution of the above solution, the notch is in the shape of an inverted triangle which is wider at the top and narrower at the bottom.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme, the biting teeth are distributed in a spiral shape.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme, the number of the tooth lobes is 4.

[0013] The beneficial effects of the present invention are as follows: the pipeline optical cable laying traction joint protection device uses the tooth petals to tightly bite the sheath of the optical cable, and when the cable guide pulls the optical cable, the force is transmitted to the device, so that the reinforcing core and the sheath are subjected to force synchronously, which can effectively prevent the optical cable core and the reinforcing core from peeling off or detaching during the traction process, and has a simple structure and is easy to operate; the diameter of the opening of the third conical hole is larger than the diameter of the reinforcing core, and the diameter of the opening of the third conical hole is smaller than the diameter of the circumference surrounded by the fiber core, so that the reinforcing core can come out from the inside, but the fiber core cannot come out from it, which is convenient for the fiber core to be knotted in the third conical hole, thereby transmitting the pulling force of the reinforcing core to the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the external gear sleeve.

[0018] Figure 4 It is a schematic diagram of the structure of the internal gear sleeve.

[0019] The reference numerals are as follows:

[0020] 1. External gear sleeve; 11. First conical hole; 2. Internal gear sleeve; 21. Tooth petal portion; 211 tooth petal; 212. Notch; 22. Connecting portion; 23. Pointed mouth portion; 24. Second conical hole; 25. Third conical hole; 26. Biting teeth. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] As attached Figure 1 To Attachment Figure 4 As shown, a pipeline optical cable laying traction joint protection device includes an outer gear sleeve 1 and an inner gear sleeve 2. The outer gear sleeve 1 is provided with a first conical hole 11 with openings at both ends. The inner gear sleeve 2 is connected to the first conical hole 11 by threads. The inner gear sleeve 2 includes a tooth petal portion 21, a connecting portion 22 and a pointed mouth portion 23 from top to bottom. The tooth petal portion 21 includes a plurality of tooth petals 211 evenly distributed around the circumference and separated by notches 212. Specifically, the number of the tooth petals 211 is 4. A second conical hole 24 is provided inside the tooth petal portion 21 and the connecting portion 22, and a third conical hole 25 coaxial with the second conical hole 24 is provided inside the pointed mouth portion 23. The second conical hole 24 and the third conical hole 25 make the inner gear sleeve 2 a tubular structure with two ends open. When the tooth petals 211 are brought closer to each other under the action of the inner gear sleeve 2, the minimum diameter of the second conical hole 24 is smaller than the diameter of the cable, and the angle between the side wall of the third conical hole 25 and the axis is greater than the angle between the second conical hole 24 and the axis. A biting tooth 26 is provided on the inner wall of the tooth petal portion 21 in the second conical hole 24.

[0024] When in use, the optical cable is passed through the second conical hole, and the reinforcing core is passed through the third conical hole. One hand holds the inner tooth sleeve tightly, and the other hand rotates the outer tooth sleeve until the sheath of the optical cable is tightly bitten by the biting teeth. Finally, the cable guide is tied and connected with the passed reinforcing core, and the optical cable is pulled in the pipeline by the cable guide. This pipeline optical cable laying and pulling joint protection device uses the tooth petals to tightly bite the sheath of the optical cable. When the cable guide pulls the optical cable, the force is transmitted to the device, so that the reinforcing core and the sheath are synchronously stressed, which can effectively prevent the optical cable core and the reinforcing core from peeling off or detaching during the pulling process. It has a simple structure and is easy to operate.

[0025] The length of the inner sleeve 2 is greater than that of the outer sleeve 1, so that it is convenient to hold the inner sleeve by hand to rotate the outer sleeve, or to hold the outer sleeve to rotate the inner sleeve. The length of the outer sleeve 1 is greater than the length of the tooth petal portion 21, so that when not in use, the outer sleeve can completely cover the gap to prevent foreign objects from entering the gap. Specifically, the length of the inner sleeve 2 is 20 cm, the length of the tooth petal portion 21 is 12 cm, and the length of the outer sleeve 1 is 15 cm.

[0026] The diameter of the opening of the third conical hole 25 is larger than the diameter of the reinforcing core, and the diameter of the opening of the third conical hole 25 is smaller than the diameter of the circle surrounded by the fiber core, so that the reinforcing core can come out from the inside, but the fiber core cannot come out from it, which makes it easy for the fiber core to be knotted in the third conical hole, thereby transmitting the tension of the reinforcing core to the device.

[0027] The outer gear sleeve 1 is truncated cone-shaped, so that the wall thickness of the first tapered hole can be uniform.

[0028] The notch 212 is in the shape of an inverted triangle that is wider at the top and narrower at the bottom, so as to facilitate the folding and tightening of the tooth petals.

[0029] The biting teeth 26 are distributed in a spiral shape so as to tightly bite the sheath of the optical cable.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protection device for a traction joint of a pipeline optical cable, characterized in that: It includes an outer tooth sleeve (1) and an inner tooth sleeve (2). A first tapered hole (11) with both ends open is provided inside the outer tooth sleeve (1). The inner tooth sleeve (2) is connected by threads in the first tapered hole (11). The inner tooth sleeve (2) sequentially includes a tooth lobe part (21), a connecting part (22) and a pointed mouth part (23) from top to bottom. The tooth lobe part (21) includes a plurality of tooth lobes (211) evenly distributed around the circumference separated by a notch (212). A second tapered hole (24) is provided inside the tooth lobe part (21) and the connecting part (22). A third tapered hole (25) coaxial with the second tapered hole (24) is provided inside the pointed mouth part (23). The second tapered hole (24) and the third tapered hole (25) make the inner tooth sleeve (2) a tubular structure with both ends open. When the tooth lobes (211) approach each other under the action of the outer tooth sleeve (1), the diameter of the smallest part of the second tapered hole (24) is smaller than the diameter of the optical cable. The angle between the side wall of the third tapered hole (25) and the axis is greater than the angle between the second tapered hole (24) and the axis. A biting tooth (26) is provided on the inner wall of the tooth lobe part (21) in the second tapered hole (24); The diameter of the opening of the third tapered hole (25) is greater than the diameter of the strength member, and the diameter of the opening of the third tapered hole (25) is smaller than the diameter of the circumference formed by the fiber cores.

2. A protection device for a traction joint of a pipeline optical cable according to claim 1, characterized in that: The length of the inner tooth sleeve (2) is greater than that of the outer tooth sleeve (1).

3. A protection device for a traction joint of a pipeline optical cable according to claim 2, characterized in that: The length of the outer tooth sleeve (1) is greater than the length of the tooth lobe part (21).

4. A protection device for a traction joint of a pipeline optical cable according to claim 3, characterized in that: The length of the inner tooth sleeve (2) is 20 cm, the length of the tooth lobe part (21) is 12 cm, and the length of the outer tooth sleeve (1) is 15 cm.

5. A protection device for a traction joint of a pipeline optical cable according to claim 1, characterized in that: The outer shape of the outer tooth sleeve (1) is frustum-shaped.

6. A protection device for a traction joint of a pipeline optical cable according to claim 1, characterized in that: The notch (212) is an inverted triangle with a wider top and a narrower bottom.

7. A protection device for a traction joint of a pipeline optical cable according to claim 1, characterized in that: The biting teeth (26) are spirally distributed.

8. A protection device for a traction joint of a pipeline optical cable according to claim 1, characterized in that: The number of the tooth lobes (211) is 4.

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