Drag chain cable for travelling crane

Abstract

The utility model discloses a tow chain cable for a travelling crane, which comprises a cable core and an outer sheath wrapping the cable core, the cable also comprises tensile elements, the tensile elements are respectively and symmetrically arranged at two sides of the cable, the cross section of each tensile element is smaller than the cross section of the cable core, and the tensile elements are steel wire stranded bodies; a plurality of wire cores are arranged in the cable core, and the structure of the plurality of wire cores is a composite structure of a center line and a peripheral ring; and the outer sheath is of a multi-layer structure. The tensile cable is reasonable in structural design, and has the following beneficial effects that the tensile element is adopted outside the cable, so that the tensile performance of the cable is enhanced, the cable is prevented from being snapped in the moving process, the tensile capability of the cable can be obviously enhanced, and the cable is enabled to resist tensile force and prolong the service life of the cable in the back-and-forth moving process of a travelling crane.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a drag chain cable for travelling crane. BACKGROUND

[0002] Travelling crane and crane and other equipment are widely used in factory, port, warehouse and other places, and cable needs to bear long-term mechanical stress and environmental challenge. Traditional fixed installation cable is prone to breakage, insulation layer damage or signal interference under the condition of frequent movement and bending, resulting in equipment failure or downtime. The wear resistance, tensile strength and flexibility of ordinary cable cannot meet the high requirements of the drag chain system.

[0003] The drag chain cable for travelling crane is a cable specially designed for use in the drag chain system, and is widely used in travelling crane, crane, automation equipment and other places that need frequent movement. This kind of cable has good flexibility, wear resistance, tensile strength and oil resistance, chemical corrosion resistance and other characteristics to ensure stable operation under complex working conditions. The position and role of drag chain cable in modern industrial production are increasingly prominent, and with the continuous progress of science and technology and the continuous development of industry, its application field will further expand. SUMMARY

[0004] The utility model aims at providing a drag chain cable for travelling crane, which has signal transmission and anti-breaking functions and prolongs the service life of the cable.

[0005] In order to achieve the above purpose, the technical scheme of the utility model provides a drag chain cable for travelling crane, which comprises a cable core and an outer sheath wrapping the cable core. The cable further comprises a tensile element, which is symmetrically arranged on both sides of the cable. The cross section of the tensile element is smaller than that of the cable core, and the tensile element is a steel wire strand. A plurality of cores are arranged in the cable core, and the structure of the cores is a composite structure of "central line + peripheral ring". The outer sheath is a multilayer structure.

[0006] Further, the number of cores is 7. One main line is arranged at the center of the cable core, which is the central line. The remaining six cores are arranged at the outer circle of the cable core around the core at the center, which is the peripheral ring.

[0007] Further, the structure of the core comprises a conductor and an insulation layer wrapping the outer layer of the conductor.

[0008] Further, the conductor is a copper conductor twisted by a plurality of copper wires of type 6, and the insulation layer is a TPE layer.

[0009] Further, the outer sheath is a three-layer structure, which comprises, from inside to outside, a wrapping layer, a shielding layer and an outer protective layer.

[0010] Furthermore, the wrapping layer is a layer of high-temperature resistant Mylar.

[0011] Furthermore, the shielding layer is a metal shielding layer.

[0012] Furthermore, the shielding layer is a tin-plated copper shielding layer, which is braided using tin-plated copper wire with a braiding density of ≥80%.

[0013] Furthermore, the outer protective layer is a TPU sheath.

[0014] Furthermore, the tensile element is provided with an outer protective layer, and is fixedly installed on both sides of the cable through the outer protective layer.

[0015] In summary, the device structure of this utility model is reasonably designed. The application of this utility model's technical solution has the following beneficial effects: the cable also includes tensile elements, which are symmetrically arranged on both sides of the cable; the use of tensile elements on the outside of the cable enhances its tensile strength, preventing it from breaking during movement. This significantly enhances the cable's tensile capacity, enabling it to resist tensile forces during the back-and-forth movement of the vehicle and extending its service life. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the drag chain cable for cranes according to this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1-Conductor; 2-Insulation layer; 3-Wrapping layer; 4-Tensile element; 5-Shielding layer; 6-Outer protective layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0019] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 When observing, the observer's left front side is designated as "front," the observer's right rear side as "rear," the observer's left rear side as "left," the observer's right front side as "right," the observer's top as "up," and the observer's bottom as "down." It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" in this text indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the present invention and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0020] See Figure 1 This utility model provides a drag chain cable for vehicles, including a cable core and an outer sheath surrounding the cable core. The cable also includes tensile elements 4, which are symmetrically arranged on both sides of the cable. The cross-section of the tensile elements 4 is smaller than that of the cable core, and the tensile elements 4 are stranded steel wires. The cable core contains several wire cores, and the structure of the several wire cores is a composite structure of "center line + outer ring". The outer sheath has a multi-layer structure.

[0021] In the composite structure of "centerline + outer ring", the centerline and outer ring cores share the tensile force. At the same time, the outer ring eliminates the stress concentration of the traditional single-core structure through circumferential uniform load distribution, realizes graded load bearing, and improves tensile strength. Meanwhile, when the dynamic outer ring is bent, the outer layer is stretched and the inner layer is compressed. Through interlayer micro-slippage, stress can be released, which not only resists bending, but also inhibits friction and wear between cores and reduces dynamic fatigue.

[0022] Tensile element 4 is a stranded steel wire, made of multiple strands of steel wire to enhance the tensile strength of the cable and prevent it from breaking during movement.

[0023] In a preferred embodiment of this utility model, the number of wire cores is 7; a main wire, namely the center wire, is set at the center position of the cable core; the remaining 6 wire cores are arranged around the wire core at the center position in the outer ring of the cable core, namely the outer ring.

[0024] Specifically, the core structure includes a conductor 1 and an insulation layer 2 wrapped around the conductor 1. Specifically, the conductor 1 is a copper conductor, which is made of multiple strands of Category 6 copper wire twisted together; the insulation layer 2 is a TPE layer.

[0025] Conductor 1 is made of multiple strands of Category 6 copper wire, which enhances the flexibility of the cable and gives it good bending characteristics.

[0026] The insulation layer 2 is made of TPE, which provides good insulation performance, has good elasticity and flexibility, and can adapt to various bending and bending stresses.

[0027] Specifically, the outer sheath has a three-layer structure, consisting of a wrapping layer 3, a shielding layer 5, and an outer protective layer 6 from the inside out. Specifically, the wrapping layer 3 is a layer of high-temperature resistant Mylar. Specifically, the shielding layer 5 is a tin-plated copper shielding layer, using tin-plated copper wire for braiding shielding with a braiding density ≥80%. Specifically, the outer protective layer 6 is a TPU sheath.

[0028] Layer 3 is a layer of high-temperature resistant Mylar. Wrapping a layer of high-temperature resistant Mylar before cable braiding effectively protects the conductor from damage, providing an additional insulation and protective layer to enhance the cable's performance and stability in high-temperature environments. Its resistance to chemical corrosion effectively improves the cable's service life and safety.

[0029] The shielding layer 5 is a tin-plated copper shielding layer. The outside of the Mylar layer is woven with tin-plated copper wire for shielding, with a weaving density of ≥80%. This is mainly to prevent electrostatic interference, electromagnetic induction, crosstalk induction, and interference from other signal lines in the energy storage system, ensuring the normal operation of the system transmission.

[0030] The outer protective layer 6 is made of TPU sheath material. TPU sheath has outstanding load-bearing capacity, impact resistance and shock absorption performance, with high tensile strength and elongation at break, and can maintain good elasticity and toughness even under high hardness; at the same time, it has good oil resistance, abrasion resistance, environmental resistance, weather resistance, corrosion resistance and low-temperature flexibility, tear resistance, etc.

[0031] Specifically, the tensile element 4 is provided with an outer protective layer 6, which is fixedly installed on both sides of the cable. The outer protective layer 6 provided on the outside of the tensile element 4 is connected to the outer protective layer 6 in the cable outer sheath, and they are extruded together and fixed in position during production.

[0032] This utility model relates to a drag chain cable used in long-term reciprocating motion. By adding a shielding layer 5, an outer protective layer 6, and a tensile element 4, the cable simultaneously possesses signal transmission and anti-breakage functions, protecting the signal transmission quality inside the cable, reducing crosstalk in signal transmission, and improving anti-interference capability. The tensile element 4 uses two stranded multi-strand fine steel wires, which can significantly enhance the tensile strength of the cable, enabling the cable to resist tensile forces during the back-and-forth movement of the vehicle and extending the cable's service life.

[0033] This invention relates to a highly flexible cable specifically designed for providing power and signal transmission in mechanical equipment. Its design allows the cable to remain stable during continuous reciprocating motion, resisting wear and tear, and is suitable for applications requiring frequent movement and bending. This cable is commonly used in automated production lines, industrial robots, and material handling equipment, particularly in heavy machinery such as overhead cranes. It can move freely within cable chains, protecting the cable from damage while ensuring stable power and signal transmission. Its application in these fields meets the high requirements of equipment for cables, such as wear resistance, corrosion resistance, and bending resistance, thereby ensuring smooth production operations.

[0034] The main features of this utility model are as follows:

[0035] 1. High flexibility

[0036] Drag chain cables need to operate in environments with frequent bending and movement, so they have excellent flexibility to prevent the cables from breaking or being damaged during long-term use.

[0037] 2. Abrasion resistance

[0038] Because the cable moves continuously in the cable chain, the outer protective layer 6 is made of TPU sheath, which has good abrasion resistance to resist mechanical wear.

[0039] 3. Tensile strength

[0040] The cable is externally reinforced with tensile element 4 to enhance its tensile strength and prevent it from breaking during movement. This significantly enhances the cable's tensile capacity, enabling it to resist tensile forces during the back-and-forth movement of the vehicle and extending its service life.

[0041] 4. Shielding effect

[0042] The addition of a braided shielding layer to the cable not only effectively resists external electromagnetic interference and protects the signal transmission quality inside the cable, but also reduces crosstalk in signal transmission, improves anti-interference capability, and prevents signal leakage and external interference.

[0043] 5. Resistant to oil and chemical corrosion

[0044] The working environment of equipment such as cranes may be exposed to oil or chemicals, and the outer protective layer 6 of the cable of this utility model has the characteristics of oil resistance and chemical corrosion resistance.

[0045] 6. Torsional resistance

[0046] The drag chain cable may twist during movement, so the cable structure is designed with tensile element 4 to provide anti-torsion capability and prevent the internal conductors from breaking.

[0047] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A drag chain cable for cranes, comprising a cable core and an outer sheath enclosing the cable core, characterized in that: The cable also includes tensile elements, which are symmetrically arranged on both sides of the cable. The cross-section of the tensile elements is smaller than that of the cable core. The tensile elements are stranded steel wires. The cable core contains several wire cores, and the structure of the several wire cores is a composite structure of "center line + outer ring". The outer sheath is a multi-layer structure.

2. The drag chain cable for cranes according to claim 1, characterized in that: The number of wire cores is 7; one main wire, namely the center wire, is set at the center position of the cable core; the remaining 6 wire cores are set around the center wire core in the outer ring of the cable core, namely the outer ring.

3. A drag chain cable for cranes according to claim 1 or 2, characterized in that: The core structure includes a conductor and an insulating layer wrapped around the conductor.

4. The drag chain cable for cranes according to claim 3, characterized in that: The conductor is a copper conductor, made of multiple strands of Category 6 copper wire twisted together; the insulation layer is a TPE layer.

5. The drag chain cable for cranes according to claim 4, characterized in that: The outer sheath has a three-layer structure, consisting of a wrapping layer, a shielding layer, and an outer protective layer from the inside out.

6. The drag chain cable for cranes according to claim 5, characterized in that: The wrapping layer is a layer of high-temperature resistant Mylar.

7. A drag chain cable for cranes according to claim 5 or 6, characterized in that: The shielding layer is a metal shielding layer.

8. The drag chain cable for cranes according to claim 7, characterized in that: The shielding layer is a tin-plated copper shielding layer, which is braided using tin-plated copper wire with a braiding density of ≥80%.

9. A drag chain cable for cranes according to claim 5, 6, or 8, characterized in that: The outer protective layer is a TPU sheath.

10. A drag chain cable for cranes according to claim 9, characterized in that: The tensile element is provided with an outer protective layer, and is fixedly installed on both sides of the cable through the outer protective layer.

Images