Telescopic low-noise spring cable with wear-resistant and bending-resistant functions

Abstract

The invention provides a telescopic low-noise spring cable with wear-resistant and bending-resistant functions, the telescopic low-noise spring cable comprises a spiral elastic section and a traction extension section which are connected, the axial length of the spiral elastic section is increased under the tension action of the traction extension section, and the spiral elastic section and the traction extension section each comprise an inner conductor layer and an outer conductor layer; the insulating layer coats the radial outer side of the inner conductor layer; the semi-conductive layer is directly coated on the radial outer side of the insulating layer, and the semi-conductive layer is made of graphite; the radial outer side of the semi-conductive layer is coated with the outer conductor layer; and the wear-resistant and bending-resistant sheath layer coats the radial outer side of the outer conductor layer. The telescopic low-noise cable has good wear resistance and bending resistance when the spiral elastic section of the telescopic low-noise cable stretches out and draws back, has the use characteristics of an existing spring cable, and has a low mechanical noise value.

Description

Technical Field

[0001] The invention relates to the technical field of electric wires and cables, and in particular to a telescopic low-noise spring cable with wear-resistant and bending-resistant functions. Background Art

[0002] With the continuous development and progress of sensing technology and detection technology, the requirements for cables used to connect sensors, control hosts, and data acquisition equipment are getting higher and higher. The low noise performance of cables is an important indicator that affects the accuracy of test data. For example, the cables used in acceleration sensors are all low-noise cables.

[0003] Usually, cables with mechanical noise values ​​less than 5mV are low-noise cables. However, with the increasing complexity of the application and the improvement of sensor accuracy, cables with mechanical noise values ​​of 2mV to 5mV can no longer meet the needs. In addition, in some application sites, due to the small space and the reciprocating motion of the equipment, a special low-noise cable is needed that can follow the reciprocating motion of the equipment and withstand a small bending radius to meet the needs of data collection and detection.

[0004] Although the low-noise cables currently on the market are very thin, they are all straight cables. They need to be dragged and dropped when in use, and then retracted after use, which can easily cause the cables to become tangled or entangled, affecting signal collection and transmission. In addition, due to reciprocating motion, they will come into contact with the surface of surrounding objects, causing a certain friction effect, which can easily cause sheath wear. Spring cables can meet the working conditions of reciprocating and small bends, but because they are in a bent state, they are subject to greater bending stress, and movement will cause greater stray charges.

[0005] Therefore, a new low-noise cable is urgently needed to meet the actual working conditions. Summary of the invention

[0006] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide a telescopic low-noise spring cable with wear-resistant and bending-resistant functions, which has good wear-resistant and bending-resistant properties when its own spiral elastic section undergoes telescopic changes, has the usage characteristics of existing spring cables, and has a lower mechanical noise value.

[0007] In order to solve the above technical problems, the present invention provides a telescopic low-noise spring cable with wear-resistant and bending-resistant functions, comprising a connected spiral elastic section and a traction extension section, wherein the axial length of the spiral elastic section becomes longer under the tensile force of the traction extension section, and the spiral elastic section and the traction extension section both comprise:

[0008] Inner conductor layer;

[0009] An insulating layer, the insulating layer covering the radially outer side of the inner conductor layer;

[0010] A semi-conductive layer, the semi-conductive layer is directly coated on the radial outer side of the insulating layer, and the semi-conductive layer is made of graphite;

[0011] An outer conductor layer, the outer conductor layer is coated on the radial outer side of the semiconducting layer;

[0012] The wear-resistant and bending-resistant sheath layer is coated on the radially outer side of the outer conductor layer.

[0013] Preferably, the material of the inner conductor layer is one of a silver-plated copper conductor, a silver-plated copper alloy conductor, a tin-plated copper conductor and a bare copper conductor.

[0014] Preferably, the material of the insulating layer is one of polytetrafluoroethylene insulating material, polyolefin insulating material, PFA insulating material and FEP insulating material, and the insulating layer is coated on the inner conductor layer by pushing or extruding.

[0015] Preferably, the semiconductive layer is formed by bonding and coating graphite particles.

[0016] Preferably, the mesh size of the graphite particles is not less than 5000.

[0017] Preferably, the outer conductor layer is woven from one of silver-plated copper wires, tin-plated copper wires and bare copper wires.

[0018] Preferably, the wear-resistant and bending-resistant sheath layer is made of TPU elastomer.

[0019] Preferably, the spiral elastic section is in the form of a spring structure, and the winding diameter of the spring structure remains unchanged.

[0020] Preferably, the extension track of the traction extension section is a straight line, and the traction extension section is parallel to the central axis of the spiral elastic section.

[0021] Preferably, the number of the spiral elastic segment is one, the number of the traction extension segments is two, and the two traction extension segments are respectively integrally formed at opposite ends of the spiral elastic segment.

[0022] As described above, the telescopic low-noise spring cable with wear-resistant and bending-resistant functions of the present invention has the following beneficial effects: the semi-conductive layer is made of graphite, and the semi-conductive layer is directly coated on the radial outer side of the insulating layer. Since the insulating layer and the semi-conductive layer are tightly bonded through the coating process, relative friction is not easy to occur between the semi-conductive layer and the insulating layer, so it is not easy to generate charges between the semi-conductive layer and the insulating layer. Most of the structure of the telescopic low-noise cable is wound into a spiral elastic section. When the spiral elastic section is rapidly expanded and contracted, even if relative friction occurs between the semi-conductive layer and the insulating layer under the action of external force and charges are generated, the generated charges can be conducted away by the semi-conductive layer with high conductivity, so that the prepared telescopic low-noise cable has a very low mechanical noise value, and the mechanical noise value of the prepared telescopic low-noise cable can reach less than 1mV. In addition, the wear-resistant and bending-resistant sheath layer has excellent wear resistance and bending resistance, and is also soft. The wear-resistant and bending-resistant sheath layer is more suitable for the use scenario of the expansion and contraction change of the spiral elastic section. Therefore, the telescopic low-noise cable of the present invention has good wear resistance and bending resistance when the spiral elastic section 6 undergoes telescopic changes, has the use characteristics of existing spring cables, and has a lower mechanical noise value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of a telescopic low-noise spring cable with wear-resistant and bending-resistant functions according to the present invention;

[0024] Figure 2 It shows the front view of the telescopic low-noise spring cable with wear-resistant and bending-resistant functions of the present invention.

[0025] Component number description

[0026] 1 Inner conductor layer

[0027] 2 Insulation layer

[0028] 3 Semiconducting layer

[0029] 4 Outer conductor layer

[0030] 5. Wear-resistant and bending-resistant sheath layer

[0031] 6 Spiral elastic section

[0032] 7 Traction extension section DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] like Figure 1 and Figure 2 As shown, the present invention provides a telescopic low-noise spring cable with wear-resistant and bending-resistant functions, comprising a connected spiral elastic section 6 and a traction extension section 7, wherein the axial length of the spiral elastic section 6 becomes longer under the pulling force of the traction extension section 7, and the spiral elastic section 6 and the traction extension section 7 both comprise:

[0036] Inner conductor layer 1;

[0037] An insulating layer 2, the insulating layer 2 is coated on the radial outer side of the inner conductor layer 1;

[0038] A semiconductive layer 3, the semiconductive layer 3 is directly coated on the radial outer side of the insulating layer 2, and the semiconductive layer 3 is made of graphite;

[0039] An outer conductor layer 4, the outer conductor layer 4 is coated on the radial outer side of the semiconducting layer 3;

[0040] The wear-resistant and bending-resistant sheath layer 5 is coated on the radially outer side of the outer conductor layer 4 .

[0041] In the present invention, the semiconductive layer 3 is made of graphite, and the semiconductive layer 3 is directly coated on the radially outer side of the insulating layer 2. Since the insulating layer 2 and the semiconductive layer 3 are tightly bonded by the coating process, relative friction is not easy to occur between the semiconductive layer 3 and the insulating layer 2, so it is not easy to generate charges between the semiconductive layer 3 and the insulating layer 2. Most of the structure of the telescopic low-noise cable is wound into a spiral elastic section 6. When the spiral elastic section 6 is rapidly expanded and contracted, even if relative friction occurs between the semiconductive layer 3 and the insulating layer 2 under the action of external force and charges are generated, the generated charges can be conducted away by the semiconductive layer 3 with high conductivity, so that the prepared telescopic low-noise cable can have a very low mechanical noise value, and the mechanical noise value of the prepared telescopic low-noise cable can reach below 1mV.

[0042] In addition, the wear-resistant and bending-resistant sheath layer 5 has excellent wear-resistant and bending-resistant properties and is also flexible, so the wear-resistant and bending-resistant sheath layer 5 is more suitable for the use scenario where the helical elastic section 6 is stretched and contracted.

[0043] Therefore, the telescopic low-noise cable of the present invention has good wear resistance and bending resistance when the spiral elastic section 6 undergoes telescopic changes, has the use characteristics of existing spring cables, and has a lower mechanical noise value.

[0044] In order to reduce the stress on the telescopic low-noise cable, the inner conductor layer 1, the insulating layer 2, the semi-conductive layer 3, the outer conductor layer 4 and the wear-resistant and bending-resistant sheath layer 5 are coaxially arranged.

[0045] In order to ensure the conductivity of the inner conductor layer 1, the material of the inner conductor layer 1 is one of a silver-plated copper conductor, a silver-plated copper alloy conductor, a tin-plated copper conductor and a bare copper conductor.

[0046] In order to make the insulating layer 2 have low dielectric properties, the material of the insulating layer 2 is one of polytetrafluoroethylene insulating material, polyolefin insulating material, PFA insulating material and FEP insulating material, and the insulating layer 2 is coated on the inner conductor layer 1 by pushing or extruding. Specifically, when the insulating layer 2 is polytetrafluoroethylene insulation, the insulating layer 2 is coated on the outer side of the inner conductor layer 1 by pushing, and when the insulating layer 2 is polyolefin insulation or PFA insulation or FEP insulation, the insulating layer 2 is coated on the outer side of the inner conductor layer 1 by high pressure extrusion.

[0047] In order to improve the coating uniformity of the semiconductive layer 3, the semiconductive layer 3 is formed by bonding and coating graphite particles.

[0048] In order to further improve the coating uniformity of the semiconductive layer 3 , the mesh number of the graphite particles is not less than 5000. This makes the semiconductive layer 3 have higher purity and conductivity, and can be more closely bonded to the insulating layer 2 .

[0049] In order to make the telescopic low-noise cable have better transmission performance, the outer conductor layer 4 is woven from one of silver-plated copper wires, tin-plated copper wires and bare copper wires. At the same time, the outer conductor layer 4 woven from silver-plated copper wires can also make the telescopic low-noise cable have good shielding performance.

[0050] In order to make the wear-resistant and bending-resistant sheath layer 5 have the properties of wear resistance and bending resistance, as well as softness and elasticity, the wear-resistant and bending-resistant sheath layer 5 is made of TPU elastomer.

[0051] In order to facilitate the laying of the telescopic low-noise cable, the spiral elastic section 6 is a spring structure, and the winding diameter of the spring structure remains unchanged. Specifically, the shape of the telescopic low-noise cable is formed according to the working conditions, and a molding process is adopted to form a coil with a certain diameter, and the cable is wound according to the application length, so that the cable can be elastically extended and contracted, and is particularly suitable for use in small extension equipment, and has excellent bending resistance and long service life.

[0052] In order to facilitate the laying of the telescopic low-noise cable, the extension track of the traction extension section 7 is a straight line, and the traction extension section 7 is parallel to the central axis of the spiral elastic section 6. This arrangement can prevent the wear-resistant and bending-resistant sheath layer 5 from being deformed or cracked, or the core wire from being broken due to stress concentration during stretching.

[0053] As a specific embodiment of the telescopic low-noise cable, the number of the spiral elastic section 6 is one, the number of the traction extension sections 7 is two, and the two traction extension sections 7 are integrally formed at opposite ends of the spiral elastic section 6 .

[0054] In summary, the telescopic low-noise cable of the present invention has good wear resistance and bending resistance when its spiral elastic section undergoes telescopic changes, has the use characteristics of existing spring cables, and has a lower mechanical noise value. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A telescopic low-noise spring cable with wear-resistant and bending-resistant functions, characterized in that: The invention comprises a connected spiral elastic section (6) and a traction extension section (7), wherein the axial length of the spiral elastic section (6) becomes longer under the pulling force of the traction extension section (7), and the spiral elastic section (6) and the traction extension section (7) both comprise: Inner conductor layer (1); An insulating layer (2), the insulating layer (2) covering the radially outer side of the inner conductor layer (1); A semiconductive layer (3), the semiconductive layer (3) is directly coated on the radially outer side of the insulating layer (2), and the semiconductive layer (3) is made of graphite; An outer conductor layer (4), the outer conductor layer (4) is coated on the radially outer side of the semiconducting layer (3); A wear-resistant and bending-resistant sheath layer (5), the wear-resistant and bending-resistant sheath layer (5) is coated on the radial outer side of the outer conductor layer (4).

2. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1 is characterized in that: The material of the inner conductor layer (1) is one of a silver-plated copper conductor, a silver-plated copper alloy conductor, a tin-plated copper conductor and a bare copper conductor.

3. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1 is characterized in that: The material of the insulating layer (2) is one of polytetrafluoroethylene insulating material, polyolefin insulating material, PFA insulating material and FEP insulating material, and the insulating layer (2) is coated on the inner conductor layer (1) by pushing or extruding.

4. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1 is characterized in that: The semiconductive layer (3) is formed by bonding and coating graphite particles.

5. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 4 is characterized in that: The mesh number of the graphite particles is not less than 5000.

6. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1, characterized in that: The outer conductor layer (4) is woven from one of silver-plated copper wires, tin-plated copper wires and bare copper wires.

7. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1, characterized in that: The wear-resistant and bending-resistant sheath layer (5) is made of TPU elastomer.

8. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1, characterized in that: The spiral elastic section (6) is in the form of a spring structure, and the winding diameter of the spring structure remains unchanged.

9. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1, characterized in that: The extension track of the traction extension section (7) is in a straight line shape, and the traction extension section (7) is parallel to the central axis of the spiral elastic section (6).

10. The wear-resistant and bending-resistant telescopic low-noise spring cable according to claim 1, characterized in that: The number of the spiral elastic section (6) is one, the number of the traction extension sections (7) is two, and the two traction extension sections (7) are respectively integrally formed at the opposite ends of the spiral elastic section (6).

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