Multidirectional water-blocking waterproof cable

Abstract

The invention relates to the technical field of waterproof cables, in particular to a multidirectional water-blocking type waterproof cable which comprises six conductor fiber cores and a second sealing barrier body connected to the outer sides of the five conductor fiber cores arranged in a circle, an insulating layer is installed on the outer side of the second sealing barrier body, and water-blocking yarn wound spirally is connected to the outer side of the insulating layer. The outer side of the conductor fiber core is provided with a water-blocking yarn, the outer side of the water-blocking yarn is provided with a water-blocking film, the outer side of the water-blocking film is connected with a water-absorbing expansion band, the outer side surface of the water-absorbing expansion band is connected with a microcapsule water-blocking mechanism in which a microcapsule water-blocking agent is arranged, the outer side surface of the water-absorbing expansion band is provided with an outer sheath, and the outer side of the middle conductor fiber core is sleeved with a first sealing barrier body. According to the multidirectional water-blocking waterproof cable, the multidirectional water-blocking purpose can be achieved, the waterproof cable can conveniently exert stable electrical performance in various complex environments and harsh conditions, and reliable guarantee is provided for power transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof cables, and specifically to a multi-directional water-blocking waterproof cable. Background Art

[0002] In environments such as humid, rainy, underwater or extreme climates, once ordinary cables are water-seeped, it will cause short-circuit faults at least, and at worst, it will lead to equipment damage or even electric shock to personnel. Therefore, it is particularly important to design the waterproof performance of cables. As a power transmission medium, waterproof cables can effectively block the penetration of external moisture into the insulation layer, prevent insulation breakdown caused by moisture, and thus greatly extend the service life of the cables. For example, in the prior art, the patent with the publication number "CN118782307A" and the patent name "A waterproof and moisture-proof cable" discloses that an insulating block is provided inside the cavity. The inner insulation layer and the outer insulation layer adopt a double-layer co-extrusion structure. The outer insulation layer is made of high-strength silicone rubber material, the inner insulation layer is made of high-temperature-resistant silicone rubber material, the insulating block is made of polyvinyl chloride insulating material, and the inner insulation layer is made of high-temperature-resistant silicone rubber material with a temperature resistance of up to 280°C. At the same time, a halogen-free and heavy-metal-free high-efficiency composite flame retardant is added to improve the flame retardant performance of the cable. The outer insulation layer can be made of high-strength silicone rubber material, which has good flexibility, tensile strength and wear resistance, and can effectively protect the cable from damage by the external environment. And the insulating sleeve adopts a double-layer co-extrusion structure, that is, the inner insulation layer and the outer insulation layer are co-extruded and formed together. This structure can ensure the tightness and uniformity of the insulating sleeve and improve the electrical performance of the cable. Polyvinyl chloride insulating material has good electrical insulation performance and mechanical strength and low cost. Also, in the prior art, the patent with the publication number "CN111446039B" and the patent name "A waterproof cable" discloses that a flow channel for fluid circulation is provided between the first waterproof layer and the second waterproof layer. A plurality of annular pads are arranged in the flow channel, and the plurality of annular pads are arranged at intervals along the axial direction of the flow channel. The plurality of water guide holes in each water guide hole group penetrate through the outer peripheral wall and the inner peripheral wall of the second waterproof layer, so that the flow channel communicates with the outside through the water guide holes. And the inner peripheral wall of the second waterproof layer is provided with a second spiral groove. The water seeping into the flow channel will flow along the second spiral groove. And the water entering the second spiral groove will, under the action of the shear force of the second spiral groove, increase its speed in the axial direction of the cable and decrease its speed in the radial direction of the cable, which can further reduce the rate of water seeping into the cable interior. Also, the diameter of the first port of each water guide hole is larger than that of the second port, so that the water outside the cable is not easy to flow inward through the water guide holes, and the water accumulated in the second spiral groove will flow out through the water guide holes, thus flowing out of the flow channel and the second waterproof layer, and further avoiding further water seepage.

[0003] Although the waterproof cable in the above-mentioned prior art can reduce the speed of water in the radial direction of the cable through the setting of the second spiral groove, and thus can further reduce the rate of water seeping into the cable interior to achieve the waterproof effect, the waterproof cable in the above can only perform one-way waterproofing, resulting in limited waterproof effect and a decline in waterproof performance after long-term use. Therefore, we propose a multi-directional water-blocking waterproof cable to solve the problems raised above. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-directional water-blocking waterproof cable to solve the problem in the above background technology that the waterproof cables on the current market can only perform one-way waterproofing, resulting in limited waterproof effect and a decline in waterproof performance after long-term use.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A multi-directional water-blocking waterproof cable includes six conductor cores, and a second sealing barrier connected to the outside of five conductor cores arranged in a circle. An insulating layer is installed on the outside of the second sealing barrier. A water-blocking yarn wound in a spiral is connected to the outside of the insulating layer, and a water-blocking film is installed on the outside of the water-blocking yarn. A water-absorbing and swelling band is connected to the outside of the water-blocking film, and a microcapsule water-blocking agent mechanism with microcapsule water-blocking agent inside is connected to the outer side of the water-absorbing and swelling band. An outer sheath is installed on the outer side of the water-absorbing and swelling band. A first sealing barrier is sleeved on the outside of the middle conductor core.

[0006] Preferably, accommodation grooves and flow grooves are equidistantly arranged on the outer side of the water-absorbing and swelling band, and a row of flow grooves is communicated between two adjacent accommodation grooves. A row of vertically arranged microcapsule water-blocking agent mechanisms is installed inside the accommodation grooves. The water-absorbing and swelling band is made of PU material.

[0007] Preferably, the middle of the first sealing barrier is hollow, and five arc-shaped grooves are opened on the outside of the first sealing barrier.

[0008] Preferably, the arc-shaped grooves on the outer side of the first sealing barrier are in close contact with the five conductor cores arranged in a circle, and the outside of the first sealing barrier is in close contact with the inner wall of the second sealing barrier.

[0009] Preferably, the inside of the second sealing barrier is hollow, and five arc-shaped grooves are opened on the inner wall of the second sealing barrier. The arc-shaped grooves opened on the inner wall of the second sealing barrier are in close contact with the outer conductor cores.

[0010] Preferably, rows of contact grooves are opened inside both the first sealing barrier and the second sealing barrier. The contact grooves are used to make partial areas of two adjacent conductor cores in contact.

[0011] Preferably, four sets of clamping grooves are formed on the outer side of the outer sheath, with four in each set, and the opening directions of adjacent sets of clamping grooves are opposite, and the clamping grooves are arc-shaped.

[0012] Preferably, four protective mechanisms are sleeved on the outer side of the outer sheath, the opening directions of two adjacent protective mechanisms up and down are opposite, and one protective mechanism is composed of two protective sleeves, and the two protective sleeves are connected by a bending limiting mechanism. A fixing wire and two fixing rubber protrusions are installed on the inner side wall of the protective sleeve. Fixing rubber protrusions are arranged on both the upper and lower sides of the fixing wire. The fixing rubber protrusions, the fixing wire and the protective sleeve are all arc-shaped, and the fixing rubber protrusions are in concave-convex fit with the clamping grooves.

[0013] Preferably, balls are installed on the outer side surface of the protective sleeve.

[0014] Preferably, the bending limiting mechanism is arranged in an "X" shape, and the material of the bending limiting mechanism is polyethylene rope material.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The multi-directional water-blocking waterproof cable can achieve the purpose of multi-directional water-blocking, facilitating the waterproof cable to exhibit stable electrical performance under various complex environments and severe conditions, providing a reliable guarantee for power transmission. The specific content is as follows: Through the setting of the microcapsule water-blocking mechanism, when the waterproof cable is damaged and water enters, the microcapsule water-blocking mechanism ruptures when encountering water and releases the water-blocking agent inside. Thus, the water-blocking agent, which is sodium polyacrylate and silicon dioxide nanoparticles inside, forms a gel-like state for water-blocking self-repair, preventing water from radially entering the cable interior. At the same time, the water-absorbing and swelling band made of PU material swells in volume when encountering water, also achieving the effect of water-blocking self-repair. Moreover, after swelling in volume, the water-absorbing and swelling band can exert a certain extrusion force on the microcapsule water-blocking mechanism, thereby facilitating the rapid flow of the water-blocking agent inside the microcapsule water-blocking mechanism, and thus improving the effect and efficiency of radial water-blocking; Further, through the combined use of the first sealing and blocking body and the second sealing and blocking body, both made of rubber material, the gaps between the six groups of conductor cores are sealed, thereby preventing water from entering along the cable length direction and contacting the conductor cores, and then facilitating longitudinal water-blocking, thus achieving the purpose of multi-directional water-blocking, facilitating the waterproof cable to exhibit stable electrical performance under various complex environments and severe conditions, and providing a reliable guarantee for power transmission. Through the protection mechanism sleeved outside the outer sheath, when pulling the waterproof cable, the contact area between the outer sheath and the working area can be reduced, thereby preventing the outer sheath from being damaged due to abrasion, and further improving the waterproof performance of the waterproof cable; At the same time, through the bending limit mechanism made of polyethylene rope, the bending degree of the waterproof cable can be blocked and protected, preventing the waterproof cable from having too large a bending amplitude and causing the outer sheath to rupture and seep water; The protective sleeve inside the protection mechanism is made of rubber material, and the protective sleeve is stably sleeved outside the outer sheath through fixing wires. Moreover, the two adjacent upper and lower protection mechanisms are arc-shaped, and multiple protection mechanisms are modularized, facilitating the replacement of a single damaged protection mechanism in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the water-absorbing and swelling band of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the second sealing and blocking body of the present invention; Figure 5 is a connection structural schematic diagram of the second sealing and blocking body and the first sealing and blocking body of the present invention; Figure 6 is a separation structural schematic diagram of the second sealing and blocking body and the first sealing and blocking body of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the outer sheath in Embodiment II of the present invention; Figure 8 is a partial cross-sectional structural schematic diagram of the connection between the outer sheath and the protective sleeve of the present invention; Figure 9This is a schematic structural diagram of the protective sleeve of the present invention.

[0017] In the figure: 1, conductor core; 2, first sealing barrier; 3, second sealing barrier; 4, insulating layer; 5, water-blocking yarn; 6, water-blocking film; 7, water-absorbing and swelling band; 71, accommodating groove; 72, circulation groove; 8, microcapsule water-blocking mechanism; 9, outer sheath; 91, clamping groove; 10, contact groove; 11, protective sleeve; 111, fixing iron wire; 112, fixing rubber protrusion; 113, ball; 12, bending limiting mechanism. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-9 , the present invention provides the following technical solutions.

[0020] Embodiment 1: The multi-directional water-blocking waterproof cable in this embodiment can perform multi-directional water-blocking, thereby further improving the waterproof performance of the waterproof cable and meeting different usage requirements. The specific structure is referred to in the appendix Figures 1-6As shown in the figure, it includes six conductor cores 1, and a second sealing barrier 3 connected to the outside of five conductor cores 1 arranged in a circle. An insulating layer 4 is installed on the outside of the second sealing barrier 3. A water-blocking yarn 5 wound in a spiral is connected to the outside of the insulating layer 4. A water-blocking film 6 is installed on the outside of the water-blocking yarn 5. A water-absorbing and swelling band 7 is connected to the outside of the water-blocking film 6. A microcapsule water-blocking mechanism 8 with microcapsule water-blocking agent inside is connected to the outer surface of the water-absorbing and swelling band 7. An outer sheath 9 is installed on the outer surface of the water-absorbing and swelling band 7. A first sealing barrier 2 is sleeved on the outside of the middle conductor core 1. Accommodating grooves 71 and flow-through grooves 72 are equidistantly formed on the outer surface of the water-absorbing and swelling band 7. A row of flow-through grooves 72 is communicated between two adjacent accommodating grooves 71. A row of vertically arranged microcapsule water-blocking mechanisms 8 is installed inside the accommodating grooves 71. The water-absorbing and swelling band 7 is made of PU material. The middle of the first sealing barrier 2 is hollow, and five arc-shaped grooves are formed on the outside of the first sealing barrier 2. The arc-shaped grooves on the outer surface of the first sealing barrier 2 are in contact with the five conductor cores 1 arranged in a circle. The outside of the first sealing barrier 2 is in contact with the inner wall of the second sealing barrier 3. The inside of the second sealing barrier 3 is hollow, and five arc-shaped grooves are formed on the inner wall of the second sealing barrier 3. The arc-shaped grooves formed on the inner wall of the second sealing barrier 3 are in contact with the outer conductor cores 1. Rows of contact grooves 10 are formed inside both the first sealing barrier 2 and the second sealing barrier 3. The contact grooves 10 are used to contact and arrange partial areas of two adjacent conductor cores 1.

[0021] First, after the entire waterproof cable is manufactured, as shown in the appendix Figure 1As shown in the figure, when the outer sheath 9 of the waterproof cable is damaged due to long-term use, water from the outside will enter the outer sheath 9. The water will come into contact with the water-swellable band 7 and the microcapsule water-blocking mechanism 8 at the corresponding positions. The water-swellable band 7 made of PU material swells in volume when encountering water to block water. At the same time, the water in the water-swellable band 7 can enter the accommodating groove 71 through the flow groove 72 and come into contact with the microcapsule water-blocking mechanism 8. The microcapsule water-blocking mechanism 8 ruptures when encountering water and releases the water-blocking agent inside. Thus, the water-blocking agent composed of sodium polyacrylate and silicon dioxide nanoparticles inside forms a gel state to perform water-blocking self-repair, preventing water from radially entering the cable interior. Moreover, after swelling in volume, the water-swellable band 7 can apply a certain extrusion force to the microcapsule water-blocking mechanism 8, facilitating the rapid flow of the water-blocking agent in the microcapsule water-blocking mechanism 8, thereby further improving the effect and efficiency of radial water-blocking. At the same time, when the waterproof cable is in use, one conductor core 1 in the middle fits tightly against the inner wall of the first sealing and blocking body 2, and the other five conductor cores 1 fit tightly against the outer side of the first sealing and blocking body 2 and the inner side wall of the second sealing and blocking body 3. The six conductor cores 1 can be in contact through the contact grooves 10 opened in the second sealing and blocking body 3 and the first sealing and blocking body 2, avoiding affecting the use of the conductor core 1. Therefore, the gaps between the six groups of conductor cores 1 are sealed by the first sealing and blocking body 2 and the second sealing and blocking body 3, both made of rubber material. Thus, it can prevent water from entering along the length direction of the cable and coming into contact with the conductor core 1, facilitating longitudinal water-blocking, and achieving the purpose of multi-directional water-blocking, enabling the waterproof cable to exhibit stable electrical performance under various complex environments and harsh conditions, providing a reliable guarantee for power transmission.

[0022] Embodiment 2: In the multi-directional water-blocking type waterproof cable of this embodiment, on the basis of Embodiment 1, the outer sheath 9 can be protected through the protection mechanism, thus preventing the outer sheath 9 from being damaged and leaking water, and further improving the waterproof effect. The specific structure is as shown in the attached Figures 7-9 figure. Four groups of clamping grooves 91 are opened on the outer side of the outer sheath 9, with four in each group, and the opening directions of adjacent groups of clamping grooves 91 are opposite. The clamping grooves 91 are arc-shaped. Four protection mechanisms are sleeved on the outer side of the outer sheath 9. The opening directions of the two adjacent protection mechanisms up and down are opposite, and one protection mechanism consists of two protective sleeves 11. The two protective sleeves 11 are connected by a bending limiting mechanism 12. A fixing iron wire 111 and two fixing rubber protrusions 112 are installed on the inner side wall of the protective sleeve 11. The fixing rubber protrusions 112 are arranged on both the upper and lower sides of the fixing iron wire 111. The fixing rubber protrusions 112, the fixing iron wire 111, and the protective sleeve 11 are all arc-shaped. The fixing rubber protrusions 112 are in concave-convex fit with the clamping grooves 91. A ball 113 is installed on the outer side of the protective sleeve 11. The bending limiting mechanism 12 is in an "X" shape, and the material of the bending limiting mechanism 12 is polyethylene rope material.

[0023] A protective mechanism is composed of two protective sleeves 11. First, take the two connected protective sleeves 11, and put the two protective sleeves 11 on the outside of the outer sheath 9 along the position of the clamping groove 91. Then, manually press the fixing wire 111 inside the protective sleeve 11, so that the inner side wall of the protective sleeve 11 is closely attached and fixed to the outer side surface of the outer sheath 9. At the same time, the fixing rubber protrusions 112 inside the protective sleeve 11 are in concave-convex fit with the clamping groove 91, which can further improve the stability of the protective sleeve 11 installed on the outside of the outer sheath 9. Similarly, as shown above, install multiple protective mechanisms in sequence. The opening directions of two adjacent protective mechanisms above and below are opposite. In this way, through the use of multiple cooperative protective mechanisms, it is convenient to protect the outside of the outer sheath 9. Since the protective sleeve 11 is made of rubber material, it will not affect the later winding and coiling work of the entire cable.

[0024] When the waterproof cable is pulled, at this time, the protective sleeve 11 inside the protective mechanism contacts the working area, thus preventing the outer sheath 9 from contacting the working area, facilitating the protection of the outer sheath 9, and avoiding the outer sheath 9 from being worn and leaking water, which can further improve the waterproof performance of the waterproof cable. When the waterproof cable is bent, at this time, through the bending limiting mechanism 12 made of polyethylene rope in an "X" shape, the bending degree of the waterproof cable can be blocked and protected, avoiding the outer sheath 9 from cracking and leaking water due to excessive bending amplitude of the waterproof cable. Since there is no connection between multiple protective mechanisms and they are separate modular designs, when one of the protective mechanisms is damaged and needs to be replaced, similarly as shown above, just use your hand to bend the two ends of the protective sleeve 11 and the fixing wire 111 outwards, so that the protective sleeve 11 and the fixing wire 111 are separated from the outer sheath 9. At this time, the fixing rubber protrusions 112 and the clamping groove 91 are separated, so one of the protective mechanisms can be replaced, and it is not necessary to replace multiple protective mechanisms, which can meet different usage requirements.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-directional water-blocking waterproof cable, comprising six conductor cores (1), and a second sealing barrier (3) connected to the outside of the five conductor cores (1) arranged in a circle, and an insulating layer (4) is installed on the outside of the second sealing barrier (3), characterized in that: The outer side of the insulating layer (4) is connected to a spirally wound water-blocking yarn (5), and a water-blocking film (6) is installed on the outer side of the water-blocking yarn (5); the outer side of the water-blocking film (6) is connected to a water-absorbing swelling belt (7), and the outer side surface of the water-absorbing swelling belt (7) is connected to a microcapsule water-blocking mechanism (8) having a microcapsule water-blocking agent inside; the outer side surface of the water-absorbing swelling belt (7) is installed with an outer sheath (9); the outer side of a conductor fiber core (1) in the middle is sheathed with a first sealing barrier (2); the outer side surface of the water-absorbing swelling belt (7) is provided with accommodating grooves (71) and flow grooves (72) at equal intervals, and a row of flow grooves (72) are connected between two adjacent accommodating grooves (71); a row of vertically arranged microcapsule water-blocking mechanisms (8) are installed inside the accommodating grooves (71); and the water-absorbing swelling belt (7) is made of PU material.

2. A multi-directional water-blocking waterproof cable according to claim 1, characterized in that: The middle of the first sealing barrier (2) is hollow, and five arc-shaped grooves are provided on the outer side of the first sealing barrier (2). The outer side of the first sealing barrier (2) is in close contact with the inner wall of the second sealing barrier (3).

3. A multi-directional water-blocking waterproof cable according to claim 1, characterized in that: The arc-shaped groove on the outer side surface of the first sealing barrier (2) is in close contact with the five conductor cores (1) arranged in a circle.

4. A multi-directional water-blocking waterproof cable according to claim 1, characterized in that: The interior of the second sealing barrier (3) is hollow, and the inner wall of the second sealing barrier (3) is provided with five arc-shaped grooves, and the arc-shaped grooves provided on the inner wall of the second sealing barrier (3) are in close contact with the conductor core (1) of the outer ring.

5. The multi-directional water-blocking waterproof cable according to claim 1, characterized in that: The first sealing barrier (2) and the second sealing barrier (3) are both provided with contact grooves (10) arranged in rows, and the contact grooves (10) are used to place partial areas of two adjacent conductor cores (1) in contact with each other.

6. A multi-directional water-blocking waterproof cable according to claim 1, characterized in that: Four groups of clamping grooves (91) are provided on the outer side of the outer sheath (9), each group having four clamping grooves, and the opening directions of adjacent groups of clamping grooves (91) are opposite, and the clamping grooves (91) are arranged in an arc shape.

7. A multi-directional water-blocking waterproof cable according to claim 6, characterized in that: The outer sleeve of the outer protective sleeve (9) is provided with four protective mechanisms, the opening directions of two protective mechanisms adjacent to each other are opposite, and one protective mechanism is composed of two protective sleeves (11), the two protective sleeves (11) are connected via a bending limit mechanism (12), the inner side wall of the protective sleeve (11) is provided with a fixed iron wire (111) and two fixed rubber protrusions (112), the upper and lower sides of the fixed iron wire (111) are provided with fixed rubber protrusions (112), the fixed iron wire (111) and the protective sleeve (11) are all arranged in an arc shape, and the fixed rubber protrusion (112) is matched with the clamping groove (91) in a concave-convex manner.

8. A multi-directional water-blocking waterproof cable according to claim 7, characterized in that: A ball (113) is mounted on the outer side of the protective sleeve (11).

9. A multi-directional water-blocking waterproof cable according to claim 7, characterized in that: The bending limiting mechanism (12) is arranged in an "X" shape, and the material of the bending limiting mechanism (12) is a polyethylene rope material.

Images