Composite control compensation cable and butt joint structure

Abstract

The invention discloses a composite control compensation cable and a butt joint structure, relates to the technical field of cable connection, and realizes sealing of strip-shaped through grooves in a shielding layer through a solid part on an armor layer and sealing of the strip-shaped through grooves in the armor layer through the solid part on the shielding layer on the basis of not losing the original high protectiveness of the cable. When two cables are in butt joint, various wrapping layers can be rapidly and conveniently stripped, meanwhile, an armor layer and a shielding layer which are made of hard materials do not need to be cut off, staggered gap filling connection can be achieved between the armor layers and the shielding layers of the two wiring terminals, on one hand, the wrapping performance of the joint is enhanced through tightly-attached staggering, and on the other hand, the wrapping performance of the joint is improved; the electromagnetic shielding on the bus and the strength provided by the armor layer can cover and extend to a butt joint area of the cable; and on the other hand, strong pulling resistance can be generated between the layers in staggered gap filling connection, the connection strength between the connectors is improved, and the phenomenon that the connectors fall off or are loosened during hard pulling operation such as laying or rolling is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cable connection, and particularly to a composite control compensation cable and a docking structure thereof. Background Technique

[0002] A control compensation cable is a cable used for temperature compensation in measurement and control systems. Its main function is to measure the change of ambient temperature and make corresponding electrical compensation to ensure the accuracy and stability of signal transmission. This kind of cable is usually used in applications that require high-precision temperature measurement, such as factory equipment, laboratory instruments, etc.

[0003] In actual applications, cables protected by multi-layer and multi-property outer sheaths can be used normally in various harsh environments (high and low temperatures, corrosiveness, etc.). For example, a general control compensation cable contains a core wrapped with several insulating layers, and is externally wrapped with a shielding layer, an armor layer (an armor layer will be added for high protection requirements), and an outer sheath in sequence from inside to outside (the nature of the outer sheath is determined and selected according to the environmental conditions where the cable is located). There is also a filling material between the shielding layer and the core insulating layer to increase the cable saturation and prevent the cores from rubbing and squeezing each other: 1. Under the protection of various high-protection performance sheaths, the application environments and conditions of cables are becoming more and more extensive. Although the current cables protected by multi-layer and multi-property outer sheaths can cope with various harsh environments, the problem that remains unchanged for cables is still heat dissipation. Especially when wrapped with more and more protective sheaths, it is always a problem that is difficult to solve efficiently. Therefore, how to handle the heat dissipation problem of cables under higher and higher protection requirements and protection properties is still a major direction problem that the current cable industry urgently needs to solve; 2. In addition, in some actual applications, the electrical connection of two independent cables is often involved. Since control compensation cables usually have more sheaths (shielding layer, armor layer, outer sheath, and other sheaths required for special properties), generally, the sheaths outside the cores at the docking ends of the two cables need to be peeled off layer by layer and cut off, and then the corresponding two cores are respectively docked and tightened in sequence through an independent screw-fixed docking structure or other clamping docking structures, and then wrapped layer by layer with independent heat shrinkable tubes and insulating tapes. This is not only time-consuming and laborious, but in fact, the high-protection performance sheaths outside the two cables in the core docking area are missing, and the protection performance of the busbar cannot extend to the docking area, resulting in a relatively low overall protection performance in the docking area. Moreover, a large amount of insulating tape is required to compensate for the missing sheaths until the outer sheaths of the two cables are stably connected. In addition, the tensile resistance and bending resistance of the docking area are much lower than those of the busbar.

[0004] Therefore, a composite control compensation cable and a docking structure are proposed to balance the above two problems without losing the original high protection of the cable. Summary of the Invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a composite control compensation cable and a docking structure to solve the problem that in fact, the high-protection wrapping layers outside the two cables in the wire core docking area are missing, and the protection performance of the busbar cannot extend to cover the docking area, resulting in a relatively low overall protection performance of the docking area. Moreover, a large amount of insulating tape is required to compensate for the missing wrapping layer until the outer wrapping layers of the two cables are stably connected.

[0006] To achieve the above object, the present invention provides the following technical solution: A composite control compensation cable includes a plurality of wire cores distributed at equal angles and an outer wrapping layer located on the outermost layer of the wire cores. It also includes a shielding layer and an armor layer sequentially wrapped outside the wire cores, and a filling material filled between the wire cores and the shielding layer. The outer walls of the shielding layer and the armor layer are both provided with strip-shaped through grooves for facilitating misaligned insertion and improving the overall heat dissipation efficiency of the cable when the two cable ends are docked.

[0007] Preferably, the ratio of the solid part of the shielding layer to the strip-shaped through grooves uniformly distributed on the shielding layer is 1:1, and the ratio of the solid part of the armor layer to the strip-shaped through grooves uniformly distributed on the armor layer is 1:1.

[0008] Preferably, the strip-shaped through grooves on the shielding layer and the solid part on the armor layer correspond to each other, and the solid part on the armor layer is used to close the strip-shaped through grooves on the shielding layer.

[0009] Preferably, the strip-shaped through grooves on the armor layer and the solid part on the shielding layer correspond to each other, and the solid part on the shielding layer is used to close the strip-shaped through grooves on the armor layer.

[0010] A composite control compensation cable docking structure includes: A pair of connecting pipe bodies; The composite control compensation cable as described in any one of the claims, and further includes the docking ends of two cables to be docked respectively inserted into both ends of the connecting pipe body, and A pair of joints symmetrically fixed at both ends of the connecting pipe body; Wherein, the docking ends of the two cables respectively pass through the two joints and intersect and converge inside the connecting pipe body.

[0011] Preferably, the connecting pipe body and the joints at both ends together form a wire core docking structure, and the number of wire core docking structures is set corresponding to the number of wire cores in the composite control compensation cable.

[0012] Preferably, elastic heat shrinkable tubes are fixed to the outer walls at both ends of the wire core docking structure, and the wire core docking structures are distributed at equal angles inside the elastic heat shrinkable tubes, and the docking tube body is made of a plastic insulating material.

[0013] Preferably, the outer end of the joint connected to the elastic heat shrinkable tube has an arched streamline shape, and an outwardly expanding flared opening is provided in the through groove inside the joint.

[0014] Compared with the prior art, the beneficial effects of the present invention are: On the basis of not losing the original high protection of the cable, the solid part on the armor layer is used to close the strip-shaped through groove on the shielding layer, and at the same time, the solid part on the shielding layer is also used to close the strip-shaped through groove on the armor layer. On the one hand: while ensuring the high protection of the cable, the adverse effect of poor heat dissipation caused by the multi-layer coating is reduced, which helps the cable to dissipate heat; on the other hand: compared with the traditional high-protection cable, half of the materials can be reduced, and it will not affect the electromagnetic shielding performance and overall strength of the cable; When two cables are docked, the numerous wrapping layers can be quickly and conveniently peeled off, and at the same time, it is not necessary to cut off the relatively hard armor layer and shielding layer. The armor layers and shielding layers of the two wiring terminals can be connected in a staggered filling manner. On the one hand, the wrapping property at the joint is enhanced by the close staggering, so that the electromagnetic shielding on the busbar and the strength provided by the armor layer can cover and extend to the docking area of the cable; on the other hand, there will be a strong pulling resistance between the staggered filling layers, which improves the connection strength between the joints and avoids the phenomenon of joint detachment or loosening during hard pulling operations such as laying or winding. In addition, the present invention changes the traditional cable clamping and docking structure. By using the docking tube body, the joint and the elastic heat shrinkable tube, preliminary protection of mutual restraint is realized. The densely dispersed wires in the wire core can easily pass through the joint with a flared inner groove port and smoothly achieve cross-misalignment connection inside the docking tube body. Secondly, the plastic deformation of the docking tube body can be realized by a relatively convenient pinching method to press the internally connected wires. At the same time, the outer end of the joint is designed as a streamline-shaped arch. After heat shrinkage, the external heat shrinkable tube will be restricted by the arched outer wall of the joint to avoid slippage of the heat shrinkable tube, and the whole operation is simple and convenient. Description of the Drawings

[0015] Figure 1 It is a three-dimensional view of a single cable of the present invention.

[0016] Figure 2 It is a three-dimensional view of the armor layer after the outer coating of the present invention is removed.

[0017] Figure 3 It is a three-dimensional view of the shielding layer after the outer coating and the armor layer of the present invention are removed.

[0018] Figure 4 This is a three-dimensional view of two cables of the present invention and the docking structure before installation.

[0019] Figure 5 This is a three-dimensional view of the docking structure after the elastic heat shrinkable tube of the present invention is removed.

[0020] Figure 6 This is a three-dimensional view of the docking structure of the present invention.

[0021] Figure 7 This is a three-dimensional view of two cables of the present invention after being docked through the docking structure.

[0022] In the figure: 1, filling material; 2, shielding layer; 3, armor layer; 4, outer sheath; 5, docking tube body; 51, joint; 6, elastic heat shrinkable tube. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a composite control compensation cable, including a plurality of cores distributed at equal angles and an outer sheath 4 located at the outermost layer of the cores, and further including a shielding layer 2 and an armor layer 3 sequentially wrapped outside the cores and a filling material 1 filled between the cores and the shielding layer 2. Strip-shaped through grooves are formed on the outer walls of the shielding layer 2 and the armor layer 3 for facilitating misaligned insertion and improving the overall heat dissipation efficiency of the cable when the two cable ends are docked.

[0025] The ratio of the solid part of the shielding layer 2 to the strip-shaped through grooves uniformly distributed on the shielding layer 2 is 1:1, and the ratio of the solid part of the armor layer 3 to the strip-shaped through grooves uniformly distributed on the armor layer 3 is 1:1.

[0026] The strip-shaped through grooves on the shielding layer 2 and the solid parts on the armor layer 3 correspond to each other, and the strip-shaped through grooves on the shielding layer 2 are closed by the solid parts on the armor layer 3.

[0027] The strip-shaped through grooves on the armor layer 3 and the solid parts on the shielding layer 2 correspond to each other, and the strip-shaped through grooves on the armor layer 3 are closed by the solid parts on the shielding layer 2.

[0028] A composite control compensation cable docking structure includes: A pair of docking tube bodies 5; It also includes that the docking ends of two cables to be docked are respectively inserted into both ends of the docking tube body 5, and A pair of connectors 51 symmetrically fixed at both ends of the butt joint pipe body 5; Among them, the butt joint ends of the two cables respectively pass through the two connectors 51 and stagger and converge inside the butt joint pipe body 5.

[0029] The butt joint pipe body 5 and the connectors 51 at both ends together form a core butt joint structure, and the number of the core butt joint structures is correspondingly set according to the number of cores in the composite control compensation cable.

[0030] Elastic heat shrinkable tubes 6 are fixed on the outer walls at both ends of the core butt joint structure, and the core butt joint structures are equiangularly distributed inside the elastic heat shrinkable tubes 6, and the butt joint pipe body 5 is made of a plastic insulating material.

[0031] The outer end of the connector 51 connected to the elastic heat shrinkable tube 6 has an arched streamline shape, and the through groove inside the connector 51 is provided with an outwardly expanding trumpet-shaped opening. Embodiment

[0032] When butting two composite control compensation cables, first, cut and remove the outer sheaths 4 at the butt joint ends of the two cables according to the conventional steps, so that Figure 2 as shown, the armor layer 3 is directly exposed, and then the armor layer 3 is successively cut along the center line of the strip-shaped through groove, and the ports of the cut armor layer 3 will present a posture of individual and equiangularly distributed armor strip plates. At this time, the shielding layer 2 inside the armor layer 3 will be like Figure 3 as shown and be directly exposed.

[0033] Immediately afterwards, cut the shielding layer 2 successively along the center line of the strip-shaped through groove. The ports of the cut shielding layer 2 will present a posture of individual and equiangularly distributed shielding strip plates. Finally, cut off the butt joint surplus of the filling material 1; Similarly, operate on the butt joint ends of the two composite control compensation cables according to the above operations, and make the cores correspond one by one as Figure 4 shown, and then take out the cable butt joint structure as Figure 5 shown. The cable butt joint structure is composed of a butt joint pipe body 5, connectors 51 equiangularly distributed inside, and elastic heat shrinkable tubes 6 wrapped outside both ends. When butting the cores, the elastic heat shrinkable tubes 6 at both ends can be turned outwards by using the elasticity of the elastic heat shrinkable tubes 6 to expose the connectors 51 for convenient butt joint with the cores; Immediately afterwards, butt the cores of the two composite control compensation cables according to Figure 4Insert them one by one corresponding to the connectors 51 at both ends in the manner shown. The emergency guide wires inside the two wire cores will be inserted and joined in a staggered and crossed form inside the docking pipe body 5. Similarly, all the wire cores are inserted and joined inside the corresponding docking pipe body 5 in the above manner. And since the docking pipe body 5 is made of plastic insulating material, after all the wire cores are docked, the docking pipe body 5 can be squeezed tightly by force, causing the docking pipe body 5 to undergo plastic deformation and pressing the inserted and joined guide wires inside. This is the first pressing effect. Subsequently, the turned-out elastic heat shrinkable tube 6 is reset to Figure 4 the normal state shown and the elastic heat shrinkable tube 6 is heated by blowing hot air, so that the elastic heat shrinkable tube 6 heat shrinks and wraps on the surfaces of the connector 51 and the outer insulation layer of the wire core. This is the second pressing effect. At the same time, the outer wall of the connector 51 is in an arched streamline shape. When the elastic heat shrinkable tube 6 heat shrinks, the elastic heat shrinkable tube 6 will stably cover on the surfaces of the connector 51 and the outer insulation layer of the wire core and it is very difficult to slip off.

[0034] Finally, as Figure 7 shown, first, the shield strip plates separated at the docking ends of the two composite control compensation cables are joined together in a staggered and filling manner, then wrapped with insulating tape. Subsequently, the armor strip plates separated at the docking ends of the two composite control compensation cables are joined together in a staggered and filling manner in the same way. Finally, it reaches Figure 7 the state of the parent body connection shown, and finally, it is wrapped with insulating tape again on the outside to complete the cable docking.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite control compensating cable, comprising a plurality of equally-angularly distributed cores and an outer sheath (4) located at the outermost layer of the cores, characterized in that: It also includes a shielding layer (2) and an armor layer (3) wrapped around the outside of the wire core in sequence, and a filling material (1) filled between the wire core and the shielding layer (2), wherein the outer walls of the shielding layer (2) and the armor layer (3) are both provided with strip-shaped through grooves for facilitating misaligned plug-in when two cable ends are butt-jointed and for improving the overall heat dissipation efficiency of the cable.

2. A composite control compensating cable according to claim 1, characterized in that: The ratio of the solid part of the shielding layer (2) to the strip-shaped through grooves evenly distributed on the shielding layer (2) is 1:1, and the ratio of the solid part of the armor layer (3) to the strip-shaped through grooves evenly distributed on the armor layer (3) is 1:

1.

3. A composite control compensating cable according to claim 2, characterized in that: The strip-shaped through groove on the shielding layer (2) corresponds to the solid part on the armor layer (3), and the solid part on the armor layer (3) is used to close the strip-shaped through groove on the shielding layer (2).

4. A composite control compensating cable according to claim 2, characterized in that: The strip-shaped through groove on the armor layer (3) corresponds to the solid part on the shielding layer (2), and the strip-shaped through groove on the armor layer (3) is closed by the solid part on the shielding layer (2).

5. A composite control compensation cable docking structure, characterized in that: include: A pair of pipe bodies (5); The composite control compensating cable as claimed in any one of claims 1 to 4, further comprising two butt-jointed ends of two required butt-jointed cables respectively plugged into the two ends of the butt-jointed pipe body (5), and A joint (51) symmetrically fixed to both ends of the butt-jointed pipe body (5); The butt ends of the two cables pass through the two connectors (51) respectively and intersect and merge inside the butt pipe body (5).

6. The composite control compensation cable docking structure according to claim 5, characterized in that: The butt-jointed pipe body (5) and the joints (51) at both ends together form a wire core butt joint structure, and the number of wire core butt joint structures is set according to the number of wire cores in the composite control compensation cable.

7. The composite control compensation cable docking structure according to claim 6 is characterized in that: Elastic heat shrink tubes (6) are fixed to the outer walls of both ends of the wire core butt joint structure, and the wire core butt joint structure is distributed at equal angles on the inner side of the elastic heat shrink tube (6), and the butt joint tube body (5) is made of a plastic insulating material.

8. The composite control compensation cable docking structure according to claim 6, characterized in that: The outer end of the joint (51) connected to the elastic heat shrink tube (6) has an arched streamlined shape, and the through groove inside the joint (51) is provided with an outward-expanding trumpet-shaped opening.

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