High-flexibility bending-resistant synchronous twisted-pair shielding flame-retardant drag chain cable

Abstract

The invention discloses a high-flexibility bending-resistant synchronous twisted-pair shielding flame-retardant towline cable, and relates to the technical field of cables, the towline cable comprises a plurality of chain links, the plurality of chain links form a towline, the inner side of each chain link is provided with a cable structure, each chain link is provided with a cable blocking structure, the cable structure comprises an outer sheath layer, and the outer sheath layer is provided with an outer sheath layer. The inner side of the outer coating layer is provided with a braiding layer, the inner side of the braiding layer is provided with a wrapping layer, the inner side of the wrapping layer is provided with a core wire, the inner side of the core wire is provided with a conductor, the inner side of the wrapping layer is provided with a filler, and the cable structure is formed by synchronously completing pair twisting and total twisting of five types of oxygen-free copper flexible conductor wires or six types of oxygen-free copper flexible conductor wires. The outer diameter of the finished cable is small, the bending resistance of the cable structure is enhanced, the phenomenon that the cable structure is prone to open circuit and short circuit in the high-frequency bending process is avoided, and meanwhile, through the cooperative use of the cable blocking structure and the disassembly and assembly structure, when the single cable structure is damaged, independent disassembly and replacement can be carried out.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a highly flexible, bending-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable. Background Art

[0002] Drag chain cable, also commonly known as towing cable or tank chain cable, is a cable that can move back and forth with the drag chain without being easily worn. The structural design of the drag chain cable makes it extremely flexible, wear-resistant and bending-resistant. Therefore, it is widely used in various occasions that require cables to move back and forth with equipment units, such as industrial electronic systems, storage equipment, robots, fire protection systems, cranes, and metallurgical industries.

[0003] In situations where equipment units need to move back and forth, in order to prevent cable entanglement, wear and tear, and pulling off, the cables are often placed in cable drag chains. However, traditional twisted-pair shielded drag chain cables use irregular twisting of Category 6 conductors, and each group is twisted separately and then twisted together. This structure has a large outer diameter, and the twisting span between each pair of core wires is too large and irregular, which is prone to breaking and short circuiting during high-frequency bending. In order to prevent the cables from being cross-entangled in the drag chain, chain buckles are integrated in the chain links to separate the cables. However, the integrated chain buckles make it difficult to thread the cables and it is difficult to replace a damaged single cable. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable to solve the problems in the above technical scheme that the traditional twisted-pair shielded drag chain cable has a large outer diameter and an irregular twisting span due to the irregular twisting of the six types of conductors, and is prone to breaking and short circuiting during high-frequency bending; at the same time, the chain buckles integrated in the chain links make it inconvenient to thread the cable and a single cable is difficult to replace when damaged.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable, comprising a plurality of chain links, wherein the plurality of chain links form a drag chain, and a cable structure is arranged on the inner side of the chain links; A cable blocking structure is provided on the chain link; The chain link is provided with a disassembly and assembly structure; The cable structure comprises an outer sheath, a braided layer is arranged inside the outer sheath, a wrapping layer is arranged inside the braided layer, a core wire is arranged inside the wrapping layer, a conductor is arranged inside the core wire, and a filler is arranged inside the wrapping layer; The cable blocking structure includes a baffle, positioning blocks are fixedly installed on both sides of the baffle, a first guide groove is provided on one side of the positioning block, a clamping groove is provided on the top of the positioning block, a second guide groove is provided on the top of the positioning block, and a third guide groove is provided on the chain link.

[0006] As a preferred embodiment, the outer layer is an insulating layer made of polyvinyl chloride material, which has the characteristics of wear resistance, oil resistance, cold resistance and corrosion resistance. The braided layer is woven from five types of tinned copper or bare copper outer conductors. The sheath is made of non-woven fabric. The core wire uses polyvinyl chloride material and has wear resistance, oil resistance and corrosion resistance, high temperature resistance of ℃ and cold resistance of -℃. The conductor is concentrically twisted with five types of oxygen-free copper soft conductor wires or six types of oxygen-free copper soft conductor wires, and bulletproof wire is added around the oxygen-free copper soft conductor wires. The filler is nylon rope.

[0007] The beneficial effects of adopting the above further scheme are: the polyvinyl chloride material of the outer layer provides wear resistance, oil resistance, cold resistance and corrosion resistance; the braided layer adopts five types of tinned copper or bare copper outer conductors to enhance the shielding effect; the non-woven fabric design of the sheath contributes to the flexibility and durability of the cable; the special material of the core wire makes it wear-resistant, oil-resistant, corrosion-resistant, high temperature resistant and cold-resistant; the conductor adopts oxygen-free copper soft conductor wire to ensure the stability and efficiency of signal transmission; the filler is nylon rope, which enhances the structural strength of the cable.

[0008] As a preferred embodiment, the first guide groove is designed as an inclined surface, the number of the card slots is three and they are evenly spaced on the positioning block, the second guide groove connects the first guide groove with the three card slots, and the size of the third guide groove is adapted to the moving trajectory of the positioning block.

[0009] The beneficial effects of adopting the above further scheme are: these designs enable the cable retaining structure to be easily installed and fixed on the chain link, and also facilitate the insertion and fixation of the cable. The first guide groove with inclined surface design and the slots with equal spacing help to quickly and accurately position, while the second guide groove and the third guide groove ensure the stability and firmness of the cable retaining structure.

[0010] As a preferred embodiment, a disassembly structure is provided on the chain link, and the disassembly structure includes an installation cavity, a moving block is movably installed in the installation cavity, a clamping block is fixedly installed at the bottom of the moving block, limiting blocks are fixedly installed on both sides of the moving block, a limiting groove is provided inside the chain link, a return spring is fixedly installed on the top of the moving block, and a pulling block is fixedly installed on the top of the moving block.

[0011] The beneficial effect of adopting the above further solution is: through the design of the installation cavity, the moving block, the clamping block, the limit block and other components, the chain links can be quickly fixed and disassembled, and the flexibility and maintainability of the drag chain cable are improved.

[0012] As a preferred implementation, the installation cavity is opened inside the chain link, the size of the limiting groove is adapted to the moving track of the limiting block, and the installation cavity is communicated with the limiting groove.

[0013] The beneficial effect of adopting the above further scheme is that the opening position and size of the installation cavity are adapted to the moving trajectory of the moving block, and the size of the limit groove matches the moving trajectory of the limit block. These designs ensure the smooth operation and accurate fixation of the disassembly and assembly structure.

[0014] As a preferred implementation, the clamping block is wedge-shaped, the size of the clamping slot is matched with the clamping block, and the wedge-shaped inclined surface of the clamping block is matched with the inclined surface of the first guide groove.

[0015] The beneficial effect of adopting the above further solution is that these designs enable the card block to be easily inserted into the card slot and fixed on the chain link, and the design of the wedge-shaped inclined surface helps to guide and fix the card block during the insertion process, ensuring the firmness and stability of the disassembly and assembly structure.

[0016] As a preferred embodiment, the top of the reset spring is fixedly connected to the inner top wall of the installation cavity, and the pulling block is composed of a connecting rod and a pulling rod. The connecting rod is fixedly installed on the top of the moving block and is located at the center of the reset spring. The pulling rod extends to the top of the chain link and its surface is fitted.

[0017] The beneficial effect of adopting the above further solution is that the setting of the reset spring enables the moving block to automatically reset when no external force is applied, while the design of the pulling block facilitates the operator to operate and control the moving block.

[0018] As a preferred embodiment, a support rod is fixedly installed inside the chain link, and a supporting structure is provided on the inner side of the chain link. The supporting structure includes a base fixedly installed on the inner bottom wall of the chain link and the bottom of the baffle, and anti-slip pads are fixedly installed on the opposite sides of the upper and lower sides of the base, and the anti-slip pads are tightly fitted with the outer layer in the cable structure.

[0019] The beneficial effect of adopting the above further scheme is that the setting of the support rod helps to maintain the shape and stability of the chain link, and the base and anti-slip pad in the supporting structure can fit closely to the outer layer of the cable structure, preventing the cable from shaking and wearing in the drag chain, thereby improving the service life and safety of the cable.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are: 1. In the present invention, the cable structure adopts a process of synchronously completing the pair twisting and overall twisting of Category 5 oxygen-free copper soft conductor wires or Category 6 oxygen-free copper soft conductor wires, so that the outer diameter of the cable is regular and round and the outer diameter is small, which enhances the bending resistance of the cable structure and avoids the cable structure having a large outer diameter, a large and irregular twisting span between each pair of core wires, and easy circuit breaking and short circuiting during high-frequency bending.

[0021] 2. In the present invention, the cable structure is placed on the bottom base and fits with the anti-skid pad. When the cable retaining structure is installed on the chain link, the anti-skid pad on the top base also fits with the cable structure, which can separate the cable structure within the chain link to prevent the cable structure from being cross-entangled.

[0022] 3. In the present invention, the cable blocking structure is fixed on the chain link through the disassembly structure to achieve the purpose of separating the cable structures and facilitating threading. When any cable structure is damaged, the fixing effect of the cable blocking structure can be released through the disassembly structure, and the single cable structure can be conveniently removed to achieve the purpose of easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a highly flexible and bend-resistant synchronous twisted-pair shielded flame-retardant drag chain cable overall structure diagram; Figure 2 It is a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable. It is a schematic diagram of the cable structure and related parts. Figure 3 It is a highly flexible and bend-resistant synchronous twisted-pair shielded flame-retardant drag chain cable. Figure 4 It is a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable with a cable retaining structure. Figure 5 It is a highly flexible and bend-resistant synchronous twisted-pair shielded flame-retardant drag chain cable disassembly and assembly structure and related parts structure diagram; Figure 6 It is a cross-sectional diagram of a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable; Figure 7 It is a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable. Schematic diagram of the cable structure cross-section.

[0024] Description of reference numerals: 1. Chain links; 2. Cable structure; 201, outer layer; 202, braided layer; 203, wrapping layer; 204, core wire; 205, conductor; 206, filler; 3. Cable blocking structure; 301, baffle; 302, positioning block; 303, first guide groove; 304, clamping groove; 305, second guide groove; 306, third guide groove; 4. Disassembly and assembly structure; 401, installation cavity; 402, moving block; 403, clamping block; 404, limiting block; 405, limiting groove; 406, reset spring; 407, pulling block; 5. Support rod; 6. Support structure; 601, base; 602, anti-slip pad. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0026] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the present invention provides a technical solution: a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable, comprising a plurality of chain links 1, wherein the plurality of chain links 1 form a drag chain, and a cable structure 2 is arranged on the inner side of the chain link 1; A cable blocking structure 3 is provided on the chain link 1; A disassembly structure 4 is provided on the chain link 1; The cable structure 2 includes an outer layer 201, a braided layer 202 is provided inside the outer layer 201, a wrapping layer 203 is provided inside the braided layer 202, a core wire 204 is provided inside the wrapping layer 203, a conductor 205 is provided inside the core wire 204, and a filler 206 is provided inside the wrapping layer 203; The cable blocking structure 3 includes a baffle 301, and positioning blocks 302 are fixedly installed on both sides of the baffle 301. A first guide groove 303 is provided on one side of the positioning block 302, a clamping groove 304 is provided on the top of the positioning block 302, a second guide groove 305 is provided on the top of the positioning block 302, and a third guide groove 306 is provided on the chain link 1; The cable structure 2 adopts a process of simultaneously completing the pair twisting and overall twisting of Category 5 oxygen-free copper soft conductor wires or Category 6 oxygen-free copper soft conductor wires, so that the outer diameter of the cable is small, which can avoid circuit breaks and short circuits during high-frequency bending. The positioning blocks 302 on both sides of the baffle 301 are inserted into the chain link 1 along the third guide groove 306, and the position of the baffle 301 is fixed. The position of each cable structure 2 can be fixed by each baffle 301 to prevent the cable structure 2 from being cross-entangled in the chain link 1.

[0027] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the outer layer 201 is an insulating layer made of polyvinyl chloride material, which has the characteristics of wear resistance, oil resistance, cold resistance and corrosion resistance. The braided layer 202 is woven from five types of tinned copper or bare copper outer conductors. The sheath 203 is made of non-woven fabrics. The core wire 204 is made of polyvinyl chloride material and has wear resistance, oil resistance and corrosion resistance, high temperature resistance of 105°C and cold resistance of -40°C. The conductor 205 is concentrically twisted by five types of oxygen-free copper soft conductor wires or six types of oxygen-free copper soft conductor wires, and bulletproof wires are added around the oxygen-free copper soft conductor wires. The filler 206 is a nylon rope. Among them, the insulating layer used in the outer layer 201 can be replaced by polyamino acid ester material from the original polyvinyl chloride material, the wrapping layer 203 can be replaced by a flame retardant tape from non-woven fabric, the core wire 204 can be replaced by polyamino acid ester material from the original polyvinyl chloride material, and the filler 206 can be replaced by Kevlar rope from the original nylon rope.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the first guide groove 303 is designed as an inclined surface, the number of the clamping grooves 304 is three and they are evenly spaced on the positioning block 302, the second guide groove 305 connects the first guide groove 303 with the three clamping grooves 304, and the size of the third guide groove 306 is adapted to the moving track of the positioning block 302; like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a disassembly structure 4 is provided on the link 1, and the disassembly structure 4 includes an installation cavity 401, a moving block 402 is movably installed in the installation cavity 401, a clamping block 403 is fixedly installed at the bottom of the moving block 402, and limiting blocks 404 are fixedly installed on both sides of the moving block 402. A limiting groove 405 is provided inside the link 1, a return spring 406 is fixedly installed on the top of the moving block 402, and a pulling block 407 is fixedly installed on the top of the moving block 402; The positioning blocks 302 on both sides of the baffle 301 are inserted into the third guide grooves 306. During this process, the first guide grooves 303 on the positioning blocks 302 first contact with the clamping blocks 403. Under the action of the first guide grooves 303, the clamping blocks 403 push the moving blocks 402 and the pulling blocks 407 upward and compress the reset springs 406. Every time a pulling block 407 is moved upward, the operator needs to pull it to ensure that the positions of the pulling blocks 407 and the clamping blocks 403 are fixed until the positions of the three pulling blocks 407 are fixed. When all are fixed, release the pulling block 407, and under the elastic force of the reset spring 406, the card block 403 at the bottom of the movable block 402 can be bounced into the card slot 304 to complete the installation of the baffle 301, so as to achieve the separated installation of the cable structure 2. When any one of the cable structures 2 is damaged, the pulling block 407 can be pulled up until the card block 403 is disengaged from the card slot 304, and the baffle 301 can be pulled outward along the third guide groove 306, so that it can be removed and the cable structure 2 can be replaced.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the installation cavity 401 is opened inside the chain link 1 , the size of the limiting groove 405 is adapted to the moving track of the limiting block 404 , and the installation cavity 401 is connected to the limiting groove 405 .

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the clamping block 403 is wedge-shaped, the size of the clamping slot 304 is adapted to the clamping block 403, and the wedge-shaped inclined surface of the clamping block 403 is adapted to the inclined surface of the first guide groove 303; Since the inclined surface of the first guide groove 303 is matched with the wedge-shaped inclined surface of the clamping block 403 , when the clamping block 403 contacts the first guide groove 303 , it will move upward under the guidance of the first guide groove 303 , so as to achieve the purpose of adjusting the position of the clamping block 403 .

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the top of the reset spring 406 is fixedly connected to the inner top wall of the installation cavity 401, and the pulling block 407 is composed of a connecting rod and a pulling rod. The connecting rod is fixedly installed on the top of the moving block 402 and is located at the center of the reset spring 406. The pulling rod extends to the top of the link 1 and its surface is in contact.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a support rod 5 is fixedly installed inside the link 1, and a supporting structure 6 is provided on the inner side of the link 1. The supporting structure 6 includes a base 601 fixedly installed on the inner bottom wall of the link 1 and the bottom of the baffle 301, respectively. Anti-skid pads 602 are fixedly installed on the opposite sides of the upper and lower bases 601, and the anti-skid pads 602 are tightly fitted with the outer layer 201 in the cable structure 2; The support rod 5 can partially support the chain link 1, providing a carrier for the installation of the baffle 301. The bases 601 on the upper and lower sides can separate and fix the cable structure 2 to prevent it from being cross-entangled in the chain link 1. The anti-slip pad 602 can prevent the cable structure 2 from sliding on the base 601 and affecting its normal use.

[0033] Working principle: first, place the outer layer 201 of the cable structure 2 on the base 601 in the chain link 1, then insert the positioning block 302 on the baffle 301 into the chain link 1 along the third guide groove 306. Under the action of the inclined surface of the first guide groove 303, the card block 403 in contact with it can be pushed upward, so that the moving block 402 and the pulling block 407 move upward, and the reset spring 406 is compressed at the same time. The operator needs to pinch each upward pulling block 407 in turn until the position of the positioning block 302 cannot be pushed. At this time, each card block 403 is exactly located on the corresponding card slot 304, and the pulling block 403 is released. 7. Under the elastic force of the reset spring 406, the card block 403 can be bounced into the card slot 304 to fix the position of the baffle 301. The base 601 located at the bottom of the baffle 301 can fix the other side of the cable structure 2 to achieve the purpose of separating the cable structures 2. If any one of the cable structures 2 is damaged, the operator needs to pull up the pulling blocks 407 on both sides of the baffle 301 of the corresponding cable structure 2 to release the fixing effect of the card block 403 on the positioning block 302, and pull out the baffle 301 along the third guide groove 306 to remove it, and replace the damaged cable structure 2 separately.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable, comprising a plurality of chain links (1), wherein the plurality of chain links (1) form a drag chain, characterized in that: A cable structure (2) is provided on the inner side of the chain link (1); The chain link (1) is provided with a cable blocking structure (3); The chain link (1) is provided with a disassembly and assembly structure (4); The cable structure (2) comprises an outer layer (201), a braided layer (202) is provided inside the outer layer (201), a wrapping layer (203) is provided inside the braided layer (202), a core wire (204) is provided inside the wrapping layer (203), a conductor (205) is provided inside the core wire (204), and a filler (206) is provided inside the wrapping layer (203); The cable blocking structure (3) comprises a baffle (301), positioning blocks (302) are fixedly mounted on both sides of the baffle (301), a first guide groove (303) is provided on one side of the positioning block (302), a clamping groove (304) is provided on the top of the positioning block (302), a second guide groove (305) is provided on the top of the positioning block (302), and a third guide groove (306) is provided on the chain link (1).

2. According to claim 1, a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable is characterized by: The outer layer (201) is an insulating layer made of polyvinyl chloride material, which has the characteristics of wear resistance, oil resistance, cold resistance and corrosion resistance. The braided layer (202) is woven from a Class V tinned copper or bare copper outer conductor. The sheath (203) is made of non-woven fabric. The core wire (204) uses polyvinyl chloride material. The conductor (205) is concentrically twisted from Class V oxygen-free copper soft conductor wire or Class VI oxygen-free copper soft conductor wire, and bulletproof wire is added around the oxygen-free copper soft conductor wire. The filler (206) is a nylon rope.

3. According to claim 1, a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable is characterized by: The first guide groove (303) is designed as an inclined surface, the number of the clamping grooves (304) is three and they are evenly spaced and distributed on the positioning block (302), the second guide groove (305) connects the first guide groove (303) with the three clamping grooves (304), and the size of the third guide groove (306) is adapted to the moving track of the positioning block (302).

4. According to claim 1, a highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable is characterized by: The chain link (1) is provided with a disassembly structure (4), the disassembly structure (4) comprising an installation cavity (401), a moving block (402) being movably installed in the installation cavity (401), a clamping block (403) being fixedly installed at the bottom of the moving block (402), limiting blocks (404) being fixedly installed on both sides of the moving block (402), a limiting groove (405) being provided inside the chain link (1), a return spring (406) being fixedly installed at the top of the moving block (402), and a pulling block (407) being fixedly installed at the top of the moving block (402).

5. A highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable according to claim 4, characterized in that: The installation cavity (401) is opened inside the chain link (1); the size of the limiting groove (405) is adapted to the moving track of the limiting block (404); and the installation cavity (401) is communicated with the limiting groove (405).

6. A highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable according to claim 4, characterized in that: The clamping block (403) is designed to be wedge-shaped, the size of the clamping slot (304) is adapted to the clamping block (403), and the wedge-shaped inclined surface of the clamping block (403) is adapted to the inclined surface of the first guide groove (303).

7. The highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable according to claim 4, characterized in that: The top of the reset spring (406) is fixedly connected to the inner top wall of the installation cavity (401); the pulling block (407) is composed of a connecting rod and a pulling rod; the connecting rod is fixedly installed on the top of the moving block (402) and is located at the center of the reset spring (406); the pulling rod extends to the top of the chain link (1) and its surface is in contact with it.

8. The highly flexible, bend-resistant, synchronous twisted-pair shielded, flame-retardant drag chain cable according to claim 1, characterized in that: A support rod (5) is fixedly installed inside the chain link (1), and a supporting structure (6) is provided on the inner side of the chain link (1). The supporting structure (6) comprises a base (601) fixedly installed on the inner bottom wall of the chain link (1) and fixedly installed on the bottom of the baffle (301), and anti-skid pads (602) are fixedly installed on opposite sides of the base (601) at the upper and lower sides, and the anti-skid pads (602) are tightly fitted with the outer coating (201) in the cable structure (2).

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