Environment-friendly flexible cable with high acid and alkali resistance

Abstract

The invention relates to the technical field of cables, in particular to a highly acid and alkali resistant environment-friendly flexible cable, which comprises a conductor, and an insulating layer, a shielding layer and an outer protective sleeve which sequentially wrap the outer side of the conductor, a water absorbing layer further wraps the outer side of the outer protective sleeve, and a water replenishing pipe is arranged between the protective sleeve and the water absorbing layer along the length direction of the outer protective sleeve. A plurality of water outlet holes are formed in the outer wall of the water supplementing pipe in the length direction; fixing rings are arranged on the outer side of the water absorption layer at intervals. And through the outer protective sleeve, erosion of alkaline water to the internal shielding layer, the insulating layer and the conductor can be effectively isolated, so that the cable can be normally used. The water absorption layer can keep the surface of the outer protection sleeve wet in a short time, gradual loss of elasticity and sealing performance, gradual decomposition and reduction of the service life caused by alternation of wetting and drying are avoided, and the water supplementing pipe can prolong the time for the cable to leave the water body. Pollution caused by mixing of micro-plastics generated by gradual dry-wet alternation decomposition of the alkaline water into the water body is avoided, and the environmental protection performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a highly acid- and alkali-resistant and environment-friendly soft cable. Background Art

[0002] With the rapid development of industrial automation and the continuous expansion of special fields such as chemical industry, ocean, and mining, cables, as key carriers of power and signal transmission, are facing increasingly complex and harsh working conditions.

[0003] In the chemical industry, offshore applications, mining and other working environments, cables need to be immersed in water, acidic or alkaline solutions, or in high temperature and high pressure environments due to some process requirements and functional requirements. In these environments, in order to maintain working performance for a long time, the cables themselves are specially designed and made of materials according to the environment compared to ordinary cables.

[0004] Among them, in order to adapt to the alkaline environment, alkali-resistant cables use alkali-resistant materials such as cross-linked polyethylene XLPE and ethylene-tetrafluoroethylene copolymer ETFE as insulation and sheath layers. These alkali-resistant cables can play a good role in conventional use environments, but in some special environments, the performance decays too quickly due to environmental reasons, reducing the service life. For example, conventional alkali-resistant cables will be affected by multiple dry-wet cycles, such as in tidal environments or intermittent contact with alkali solutions. The stability of its alkali resistance and overall performance will be affected. In the marine environment, the alkaline components of seawater and the alternating dry and wet conditions will cause the cable sheath layer to gradually lose its elasticity and sealing, resulting in seawater infiltration into the cable, affecting the normal use of the cable. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly soft cable with high acid and alkali resistance, so as to solve the problem in the prior art that after multiple dry-wet cycles, the sheath layer of conventional alkali-resistant cables gradually loses its elasticity and sealing, thereby causing seawater to penetrate into the cable and affecting the normal use of the cable.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A highly acid- and alkali-resistant environmentally friendly soft cable comprises a conductor, and an insulating layer, a shielding layer and an outer protective sheath which are sequentially wrapped around the outside of the conductor, a water absorbing layer is also wrapped around the outside of the outer protective sheath, a water supply pipe is arranged between the protective sheath and the water absorbing layer along the length direction of the outer protective sheath, and a plurality of water outlet holes are arranged on the outer wall of the water supply pipe along the length direction; fixing rings are arranged at intervals on the outside of the water absorbing layer.

[0007] A further technical solution is that the conductor is made of multiple strands of copper wires twisted together; the insulating layer is made of cross-linked polyethylene; the shielding layer is a metal braided shielding layer; and the outer protective sheath is made of a mixture of fluoroplastics and polyvinyl chloride.

[0008] A further technical solution is that the metal braided shielding layer is woven from tinned copper wires, and the diameter of the tinned copper wires is 0.08-0.2 mm.

[0009] A further technical solution is that a winding rope is arranged between two adjacent fixing rings, and the winding rope is arranged in a spiral winding along the outer side of the water absorbing layer; a fixing block is arranged on the outer wall of the fixing ring, and the end of the winding rope is connected to the fixing block.

[0010] A further technical solution is that the fixed block is provided with through holes running through both sides, the end of the winding rope passes through the through holes, and is connected to a limiting ball after passing through the through holes; an elastic plate is obliquely arranged on the hole wall of the through hole away from the fixing ring, one end of the elastic plate close to the limiting ball is connected to the hole wall of the through hole, and the other end gradually approaches the hole wall on the other side of the through hole; a sliding hole connected to the through hole is provided on the side of the fixed block away from the fixing ring, a marking rod is slidably arranged in the sliding hole, one end of the marking rod is connected to the elastic plate in the through hole, and the other end is placed in the sliding hole, when the elastic plate moves toward the sliding hole, the end of the marking rod away from the elastic plate gradually passes through the sliding hole; the aperture of the through hole gradually decreases from one end close to the limiting ball to the other end, and the diameter of the limiting ball is between the apertures at both ends of the through hole.

[0011] A further technical solution is that the marking rod is made of fluoroplastic and is added with pigment and fluorescent agent; a flexible sheet is arranged at a position of the sliding hole close to the surface of the fixed block, and one side of the flexible sheet is connected to the hole wall of the sliding hole.

[0012] A further technical solution is that the fixing ring is composed of a first half ring and a second half ring, a first connecting piece is arranged on the outer side of the end of the first half ring, and a second connecting piece is arranged on the outer side of the end of the second half ring, and the first connecting piece and the second connecting piece are fixed by plastic bolts.

[0013] A further technical solution is that a locking plate is arranged between the first connecting plate and the second connecting plate, and a long hole is arranged on the locking plate running through both sides, and the plastic bolt passes through the long hole; a plurality of limit strips are arranged on the surface surrounding the outer protective cover, and limit rings are arranged at both ends of the limit strips on the surface surrounding the outer protective cover.

[0014] A further technical solution is that the material of the water absorption layer is fiber sponge; one end of the water supply pipe is connected to a water supply pump.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The outer protective sheath can effectively isolate the alkaline water from corroding the internal shielding layer, insulating layer and conductor, so that the cable can be used normally; 2. By arranging a water-absorbing layer and a water-supplementing pipe, when the cable leaves the water body, the surface of the outer protective sheath can be kept moist for a short time through the water-absorbing layer, avoiding the gradual loss of elasticity and sealing due to alternating dry and wet, as well as gradual decomposition, thereby reducing the service life. The water-supplementing pipe can replenish the water to the water-absorbing layer through the water-supplementing pipe and the water outlet at regular intervals, thereby extending the time the cable leaves the water body; 3. By arranging a fixing ring, the water-absorbing layer can be well fixed on the outside of the outer protective sheath, so that the water-absorbing layer can fit the outer protective sheath well; 4. By preventing the outer protective sheath from being in a dry and wet alternating working environment, the surface of the outer protective sheath can be prevented from gradually decomposing due to the drying of the alkaline water body, thereby avoiding the microplastics produced after the decomposition from mixing into the water body and causing pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial side schematic diagram of a highly acid- and alkali-resistant environmentally friendly flexible cable of the present invention.

[0017] Figure 2 The cross-sectional schematic diagram of a highly acid- and alkali-resistant environmentally friendly flexible cable of the present invention.

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of the area marked A in the middle.

[0019] Figure 4 for Figure 2 The first state of the local enlarged schematic diagram at the mark B.

[0020] Figure 5 for Figure 2 The second state of the local enlarged schematic diagram at the mark B.

[0021] Icon: 1-conductor, 2-insulating layer, 3-shielding layer, 4-outer protective cover, 5-water absorption layer, 6-water supply pipe, 7-fixing ring, 8-winding rope, 9-fixing block, 10-through hole, 11-limiting ball, 12-elastic plate, 13-sliding hole, 14-marking rod, 15-flexible sheet, 16-first half ring, 17-second half ring, 18-first connecting sheet, 19-second connecting sheet, 20-plastic bolt, 21-locking sheet, 22-long hole, 23-limiting strip, 24-limiting ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Figures 1 to 5 An embodiment of the present invention is shown.

[0024] Example: A highly acid- and alkali-resistant environmentally friendly soft cable comprises a conductor 1, and an insulating layer 2, a shielding layer 3 and an outer protective sheath 4 which are sequentially wrapped around the outer side of the conductor 1. A water absorbing layer 5 is also wrapped around the outer side of the outer protective sheath 4. A water supply pipe 6 is arranged between the outer protective sheath 4 and the water absorbing layer 5 along the length direction of the outer protective sheath 4. The outer wall of the water supply pipe 6 is provided with a plurality of water outlet holes along the length direction. A fixing ring 7 is arranged at intervals on the outer side of the water absorbing layer 5. The outer protective sheath 4 can effectively isolate the alkaline water from corroding the internal shielding layer 3, the insulating layer 2 and the conductor 1, so that the cable can be used normally. By providing the water absorbing layer 5 and the water supply pipe 6, when the cable leaves the water body, the surface of the outer protective sheath 4 can be kept moist for a short time through the water absorbing layer 5, so as to avoid the gradual loss of elasticity and sealing due to alternating dry and wet, and the gradual decomposition, so as to reduce the service life. The water supply pipe 6 can replenish the water to the water absorbing layer 5 through the water supply pipe 6 and the water outlet holes at certain intervals, so as to extend the time when the cable leaves the water body. By providing the fixing ring 7 , the water absorbing layer 5 can be well fixed on the outside of the outer protective cover 4 , so that the water absorbing layer 5 can fit well with the outer protective cover 4 .

[0025] The conductor 1 is made of a plurality of copper wires twisted together; the insulating layer 2 is made of cross-linked polyethylene; the shielding layer 3 is a metal braided shielding layer 3; and the outer protective sheath 4 is made of a mixture of fluoroplastic and polyvinyl chloride.

[0026] The metal braided shielding layer 3 is braided from tinned copper wires, and the diameter of the tinned copper wires is 0.08-0.2 mm.

[0027] A winding rope 8 is arranged between two adjacent fixing rings 7, and the winding rope 8 is arranged in a spiral winding along the outer side of the water absorbing layer 5; a fixing block 9 is arranged on the outer wall of the fixing ring 7, and the end of the winding rope 8 is connected to the fixing block 9. Due to the limitation of its own material, the service life of the water absorbing layer 5 will not be as long as that of the cable. Therefore, it may be necessary to replace the water absorbing layer 5 when it cannot meet the use requirements. When replacing, in order to avoid being inserted from the end of the cable, the water absorbing layer 5 is wrapped and installed from the side of the cable. In this way, there will be a gap in the length direction of the water absorbing layer 5, so as to make the gap fit and prevent the water absorbing layer 5 from falling off. The spiral winding method can make the installation of the water absorbing layer 5 more stable.

[0028] The fixed block 9 is provided with a through hole 10 that passes through both sides, and the end of the winding rope 8 passes through the through hole 10, and is connected to the limiting ball 11 after passing through the through hole 10; an elastic plate 12 is obliquely provided on the hole wall of the through hole 10 away from the fixing ring 7, and one end of the elastic plate 12 close to the limiting ball 11 is connected to the hole wall of the through hole 10, and the other end gradually approaches the hole wall on the other side of the through hole 10; a sliding hole 13 connected to the through hole 10 is provided on the side of the fixed block 9 away from the fixing ring 7, and a marking rod 14 is slidably provided in the sliding hole 13, one end of the marking rod 14 is connected to the elastic plate 12 in the through hole 10, and the other end is placed in the sliding hole 13, when the elastic plate 12 moves toward the sliding hole 13, the end of the marking rod 14 away from the elastic plate 12 gradually passes through the sliding hole 13; the aperture of the through hole 10 gradually decreases from one end close to the limiting ball 11 to the other end, and the diameter of the limiting ball 11 is between the apertures at both ends of the through hole 10. After the winding rope 8 is tightened, it will tightly fix the water-absorbing layer 5 to the outside of the outer protective cover 4. At the same time, after the winding rope 8 is tightened, the limiting ball 11 will be pulled into the through hole 10, and the elastic plate 12 will be pressed against the elastic plate 12 in the through hole 10, so that the elastic plate 12 moves toward the sliding hole 13, so that the marking rod 14 passes through the sliding hole 13. The marking rod 14 protruding from the sliding hole 13 means that the winding rope 8 is in a tightened state, and the water-absorbing layer 5 is firmly installed in this state. When the water-absorbing layer 5 is damaged and the winding rope 8 is loosened, or when the winding rope 8 is broken, the tightened state of the winding rope 8 is destroyed, and the limiting ball 11 cannot remain tightly against the elastic plate 12. The elastic plate 12 will push the limiting ball 11 out of the through hole 10 due to its own elasticity, and at the same time drive the marking rod 14 to retract into the sliding hole 13. The operator can see whether the winding rope 8 is in a tightened state based on the state of the marking rod 14.

[0029] The material of the marking rod 14 is fluoroplastic, and pigments and fluorescent agents are added; the sliding hole 13 is provided with a flexible sheet 15 at a position close to the surface of the fixed block 9, and one side of the flexible sheet 15 is connected to the hole wall of the sliding hole 13. The marking rod 14, the fixing ring 7, the fixing block 9, and the elastic plate 12 are all made of alkali-resistant plastic materials, such as fluoroplastics, polyethylene plastics, etc., and can be used in alkaline water bodies for a long time. By adding the flexible sheet 15, when the marking rod 14 is retracted into the sliding hole 13, the sliding hole 13 can be shielded, so that the marking rod 14 is completely hidden. By adding pigments and fluorescent agents to the marking rod 14, the marking rod 14 can be easily observed when the marking rod 14 extends out of the sliding hole 13.

[0030] The fixing ring 7 is composed of a first half ring 16 and a second half ring 17, a first connecting piece 18 is arranged on the outer side of the end of the first half ring 16, and a second connecting piece 19 is arranged on the outer side of the end of the second half ring 17, and the first connecting piece 18 and the second connecting piece 19 are fixed by plastic bolts 20. The setting of the first half ring 16 and the second half ring 17 can facilitate the installation of the fixing ring 7, and after the first half ring 16 and the second half ring 17 are aligned, the first connecting piece 18 and the second connecting piece 19 can be fixed together by the plastic bolts 20.

[0031] A locking piece 21 is provided between the first connecting piece 18 and the second connecting piece 19. The locking piece 21 is provided with a long hole 22 that passes through both sides. The plastic bolt 20 passes through the long hole 22. A plurality of limiting strips 23 are provided around the surface of the outer protective sleeve 4. Limiting rings 24 are provided at both ends of the limiting strips 23 around the surface of the outer protective sleeve 4. In order to prevent the fixing ring 7 from rotating around the outer protective sleeve 4 after installation, causing the winding rope 8 to lose its tightening state, when installing the fixing ring 7, the locking piece 21 is clamped between the first connecting piece 18 and the second connecting piece 19, but the plastic bolt 20 is not locked, and it is not inserted into the fixing ring 7. After the fixing ring 7 is rotated to tighten the winding rope 8, the locking piece 21 is pushed and inserted between two adjacent limiting strips 23. The limiting strips 23 and the locking piece 21 cooperate to prevent the fixing ring 7 from rotating, and the plastic bolt 20 is locked at the same time. By providing the limiting ring 24, the fixing ring 7 can be prevented from moving up and down along the length direction of the outer protective sleeve 4 in cooperation with the locking piece 21.

[0032] The material of the water absorbing layer 5 is fiber sponge; one end of the water supply pipe 6 is connected to a water supply pump.

[0033] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A highly acid- and alkali-resistant environmentally friendly flexible cable, comprising a conductor (1), and an insulating layer (2), a shielding layer (3) and an outer protective sheath (4) sequentially wrapped around the outside of the conductor (1), characterized in that: The outer side of the outer protective sleeve (4) is also wrapped with a water absorbing layer (5); a water supply pipe (6) is provided between the outer protective sleeve (4) and the water absorbing layer (5) along the length direction of the outer protective sleeve (4); the outer wall of the water supply pipe (6) is provided with a plurality of water outlet holes along the length direction; and fixing rings (7) are provided at intervals on the outer side of the water absorbing layer (5).

2. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 1, characterized in that: The conductor (1) is made of a plurality of twisted copper wires; the insulating layer (2) is made of cross-linked polyethylene; the shielding layer (3) is a metal braided shielding layer (3); and the outer protective sheath (4) is made of a mixture of fluoroplastics and polyvinyl chloride.

3. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 2, characterized in that: The metal braided shielding layer (3) is braided from tinned copper wires, and the diameter of the tinned copper wires is 0.08-0.2 mm.

4. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 1, characterized in that: A winding rope (8) is provided between two adjacent fixing rings (7), and the winding rope (8) is spirally wound along the outer side of the water absorbing layer (5); a fixing block (9) is provided on the outer wall of the fixing ring (7), and the end of the winding rope (8) is connected to the fixing block (9).

5. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 4, characterized in that: The fixing block (9) is provided with through holes (10) passing through both sides, and the end of the winding rope (8) passes through the through hole (10) and is connected to a limiting ball (11) after passing through the through hole (10); an elastic plate (12) is obliquely provided on the hole wall of the through hole (10) on the side away from the fixing ring (7); one end of the elastic plate (12) close to the limiting ball (11) is connected to the hole wall of the through hole (10), and the other end gradually approaches the hole wall on the other side of the through hole (10); a spring connected to the through hole (10) is provided on the side of the fixing block (9) away from the fixing ring (7). A sliding hole (13), wherein a marking rod (14) is slidably arranged in the sliding hole (13), one end of the marking rod (14) is connected to the elastic plate (12) in the through hole (10), and the other end is placed in the sliding hole (13); when the elastic plate (12) moves toward the sliding hole (13), the end of the marking rod (14) away from the elastic plate (12) gradually passes through the sliding hole (13); the aperture of the through hole (10) gradually decreases from one end close to the limiting ball (11) to the other end, and the diameter of the limiting ball (11) is between the apertures at both ends of the through hole (10).

6. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 5, characterized in that: The marking rod (14) is made of fluoroplastic and is added with pigment and fluorescent agent; the sliding hole (13) is provided with a flexible sheet (15) at a position close to the surface of the fixed block (9), and one side of the flexible sheet (15) is connected to the hole wall of the sliding hole (13).

7. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 4, characterized in that: The fixing ring (7) is composed of a first half ring (16) and a second half ring (17) joined together; a first connecting piece (18) is arranged on the outer side of the end of the first half ring (16); a second connecting piece (19) is arranged on the outer side of the end of the second half ring (17); the first connecting piece (18) and the second connecting piece (19) are fixed by means of plastic bolts (20).

8. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 7, characterized in that: A locking plate (21) is provided between the first connecting plate (18) and the second connecting plate (19), and a long hole (22) is provided on the locking plate (21) and passes through both sides, and the plastic bolt (20) passes through the long hole (22); a plurality of limit strips (23) are provided around the surface of the outer protective sleeve (4), and limit rings (24) are provided at both ends of the limit strips (23) around the surface of the outer protective sleeve (4).

9. The highly acid- and alkali-resistant environmentally friendly flexible cable according to claim 1, characterized in that: The water absorbing layer (5) is made of fiber sponge; one end of the water supply pipe (6) is connected to a water supply pump.

Images