A multi-directional water-blocking waterproof cable

Abstract

The present invention relates to the technical field of waterproof cables, specifically a multidirectional water-blocking waterproof cable comprising six conductor cores and a second sealing barrier connected to the outside of the five conductor cores arranged in a circle. The second sealing barrier is provided with an insulating layer on the outside of the second sealing barrier, a spirally wound water-blocking yarn connected to the outside of the insulating layer, and a water-blocking film installed on the outside of the water-blocking yarn. A water-swelling tape is connected to the outside of the water-swelling tape, and a microcapsule water-blocking mechanism containing a microcapsule water-blocking agent is connected to the outer side of the water-swelling tape. An outer sheath is provided on the outer side of the water-swelling tape, and the first sealing barrier is provided on the outer side of the central conductor core. This multidirectional water-blocking waterproof cable achieves multidirectional water-blocking, enabling the waterproof cable to exhibit stable electrical performance in a variety of complex environments and harsh conditions, providing reliable protection for power transmission.

Description

Technical Field

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

[0002] In humid, rainy, underwater or extreme climate environments, once ordinary cables seep water, it may cause short circuit failures at the least, and even damage equipment or even electric shock to people at the worst. Therefore, it is particularly important to design cables with waterproof performance. As a power transmission cable, 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 cable; for example, the patent name disclosed in the prior art with the publication number "CN118782307A" is "A waterproof and moisture-proof cable", which discloses that an insulating block is provided inside the cavity, and the inner and outer insulating layers are double-layered. 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 insulation block is made of polyvinyl chloride insulation material, the inner insulation layer is made of high-temperature resistant silicone rubber material, and the temperature is up to 280 ° C. At the same time, a halogen-free, 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 softness, tensile strength and wear resistance, and can effectively protect the cable from damage from the external environment. The insulating sleeve adopts a double-layer co-extrusion structure, that is, the inner insulation layer and the outer insulation layer are extruded together. This structure can ensure The tightness and uniformity of the insulating sleeve improve the electrical performance of the cable. The polyvinyl chloride insulating material has good electrical insulation performance and mechanical strength, and the cost is low. The patent name disclosed in the prior art with the announcement number "CN111446039B" is "A waterproof cable", which discloses that a flow channel for fluid circulation is provided between the first waterproof layer and the second waterproof layer, and multiple annular gaskets are arranged in the flow channel. The multiple annular gaskets are arranged at intervals along the axial direction of the flow channel. The multiple water guide holes of each water guide hole group penetrate the outer peripheral wall and the inner peripheral wall of the second waterproof layer, so that the flow channel is connected to the outside through the water guide holes, and the second waterproof layer is provided with a plurality of annular gaskets. A second spiral groove is arranged on the inner circumferential wall of the waterproof layer. Water that penetrates into the flow channel will flow along the second spiral groove. Under the action of the shear force of the second spiral groove, the water entering the second spiral groove will increase its speed in the axial direction of the cable and reduce its speed in the radial direction of the cable, thereby further reducing the rate of water infiltration into the cable. In addition, the diameter of the first port of each water guide hole is larger than the diameter of the second port, so that water outside the cable is not easy to flow inward through the water guide hole, and the water in the second spiral groove will accumulate and flow outward through the water guide hole, thereby flowing out of the flow channel and the second waterproof layer, thereby preventing further water infiltration.

[0003] Although the waterproof cable in the above-mentioned prior art can reduce the speed of water in the radial direction of the cable by setting the second spiral groove, and can further reduce the rate of water infiltration into the interior of the cable to achieve a waterproof effect, the above-mentioned waterproof cable can only be unidirectionally waterproof, which limits the waterproof effect. After long-term use, the waterproof performance deteriorates. Therefore, we propose a multi-directional water-blocking waterproof cable to solve the above-mentioned problems. 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 raised in the above background technology that the waterproof cables currently on the market can only be waterproof in one direction, resulting in limited waterproof effect and degradation of waterproof performance after long-term use.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a multi-directional water-blocking waterproof cable, comprising six conductor cores, and a second sealing barrier connected to the outside of the five conductor cores arranged in a circle, and an insulating layer is installed on the outside of the second sealing barrier, the outside of the insulating layer is connected to a spirally wound water-blocking yarn, and the outside of the water-blocking yarn is installed with a water-blocking film, the outside of the water-blocking film is connected to a water-absorbing expansion belt, and the outer side of the water-absorbing expansion belt is connected to a microcapsule water-blocking mechanism with a microcapsule water-blocking agent inside, the outer side of the water-absorbing expansion belt is installed with an outer sheath, and the outer side of the middle conductor core is sheathed with a first sealing barrier.

[0006] Preferably, the outer side of the water-absorbing expansion belt is provided with accommodating grooves and flow grooves at equal intervals, and a row of flow grooves is connected between two adjacent accommodating grooves. A row of vertically arranged microcapsule water-blocking mechanisms is installed inside the accommodating grooves, and the water-absorbing expansion belt is made of PU material.

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

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

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

[0010] Preferably, contact grooves arranged in rows are provided inside the first sealing barrier and the second sealing barrier, and the contact grooves are used to place partial areas of two adjacent conductor cores in contact with each other.

[0011] Preferably, four groups of snap-fit grooves are provided on the outer side of the outer sheath, with four snap-fit grooves in each group, and the opening directions of adjacent groups of snap-fit grooves are opposite, and the snap-fit grooves are arranged in an arc shape.

[0012] Preferably, the outer side of the outer sheath is provided with four protective mechanisms, the opening directions of the two adjacent protective mechanisms are opposite, and one protective mechanism is composed of two protective sleeves, which are connected by a bending limit mechanism, and the inner side wall of the protective sleeve is installed with a fixed iron wire and two fixed rubber protrusions, and fixed rubber protrusions are provided on the upper and lower sides of the fixed iron wire, and the fixed rubber protrusions, the fixed iron wire and the protective sleeve are all arranged in an arc shape, and the fixed rubber protrusions are matched with the clamping grooves.

[0013] Preferably, a ball bearing is installed on the outer side 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: the multi-directional water-blocking waterproof cable can achieve the purpose of multi-directional water blocking, so that the waterproof cable can exert stable electrical performance in various complex environments and harsh conditions, providing reliable protection for power transmission. The specific contents are 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 breaks after encountering water to release the water-blocking agent inside, so that the water-blocking agent containing sodium polyacrylate and silica nanoparticles forms a gel to perform water-blocking self-repair, preventing water from radially entering the cable. At the same time, the water-absorbing and expanding belt of PU material expands in volume after encountering water, which can also achieve water-blocking self-repair. The repair effect is achieved, and the water-absorbing expansion belt after its volume expands can apply a certain extrusion pressure to the microcapsule water-blocking mechanism, thereby facilitating the rapid flow of the water-blocking agent in the microcapsule water-blocking mechanism, thereby improving the radial water-blocking effect and efficiency; further, through the coordinated use of the first sealing barrier and the second sealing barrier, both of which are made of rubber material, the gaps between the six groups of conductor fiber cores are sealed, thereby preventing water from entering and contacting the conductor fiber cores along the length of the cable, thereby facilitating longitudinal water blocking, thereby achieving the purpose of multi-directional water blocking, and facilitating the waterproof cable to exert stable electrical performance in various complex environments and harsh conditions, providing reliable guarantee for power transmission. By means of the protective mechanism sleeved on the outside of the outer sheath, the contact area between the outer sheath and the working area can be reduced when the waterproof cable is pulled, thereby avoiding damage to the outer sheath due to wear, thereby further improving the waterproof performance of the waterproof cable; at the same time, by means of the bending limit mechanism made of polyethylene rope, the bending degree of the waterproof cable can be blocked and protected, avoiding excessive bending of the waterproof cable and causing the outer sheath to rupture and leak water; the protective sleeve in the protective mechanism is made of rubber material, and the protective sleeve is stably sleeved on the outside of the outer sheath by fixing the iron wire, and the two adjacent protective mechanisms above and below are arc-shaped, and multiple protective mechanisms are modularly arranged to facilitate the replacement of a single damaged protective mechanism at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the water-swelling belt of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the second sealing barrier of the present invention; Figure 5 This is a schematic diagram of the connection structure between the second sealing barrier and the first sealing barrier of the present invention; Figure 6 This is a schematic diagram of the structure in which the second sealing barrier is separated from the first sealing barrier of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the outer sheath in the second embodiment of the present invention; Figure 8 This is a schematic diagram of a partial cross-sectional structure of the connection between the outer sheath and the protective sheath of the present invention; Figure 9This is a schematic diagram of the protective cover structure 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 expansion belt; 71. Accommodating groove; 72. Flow groove; 8. Microcapsule water-blocking mechanism; 9. Outer sheath; 91. Snap-fit groove; 10. Contact groove; 11. Protective sleeve; 111. Fixing wire; 112. Fixing rubber protrusion; 113. Ball; 12. Bending limit mechanism. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also 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 be multi-directionally water-blocking, thereby further improving the waterproof performance of the waterproof cable and meeting different usage requirements. For specific structure, please refer to the attached Figures 1-6As shown, it includes 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, and a spirally wound water-blocking yarn 5 is connected to the outside of the water-blocking yarn 5, and a water-blocking film 6 is installed on the outside of the water-blocking film 6, and a water-absorbing expansion belt 7 is connected to the outside of the water-absorbing expansion belt 7, and the outer side of the water-absorbing expansion belt 7 is connected to a microcapsule water-blocking mechanism 8 with a microcapsule water-blocking agent inside, and an outer sheath 9 is installed on the outer side of the water-absorbing expansion belt 7. The outer side of the middle conductor core 1 is sheathed with a first sealing barrier 2, and the outer side of the water-absorbing expansion 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, and a row of vertical grooves 72 are installed inside the accommodating grooves 71. The microcapsule water-blocking mechanism 8 is provided, and the water-absorbing expansion belt 7 is made of PU material. The middle of the first sealing barrier 2 is hollow, and five arc-shaped grooves are provided on the outside of the first sealing barrier 2. The arc-shaped grooves on the outer side of the first sealing barrier 2 are in contact with the five conductor cores 1 arranged in a circle, and the outer side of the first sealing barrier 2 is in contact with the inner wall of the second sealing barrier 3. The interior of the second sealing barrier 3 is hollow, and five arc-shaped grooves are provided on the inner wall of the second sealing barrier 3. The arc-shaped grooves on the inner wall of the second sealing barrier 3 are in contact with the conductor cores 1 in the outer circle. The interiors of the first sealing barrier 2 and the second sealing barrier 3 are both provided with contact grooves 10 arranged in a row, and the contact grooves 10 are used to contact partial areas of two adjacent conductor cores 1.

[0021] First, after the entire waterproof cable is manufactured, as shown in the attached Figure 1As shown, 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, and the water will contact the water-absorbing and expanding belt 7 and the microcapsule water-blocking mechanism 8 at the corresponding position. The water-absorbing and expanding belt 7 made of PU material expands in volume after encountering water to block water. At the same time, the water in the water-absorbing and expanding belt 7 can enter the containing groove 71 through the circulation groove 72 and contact the microcapsule water-blocking mechanism 8. The microcapsule water-blocking mechanism 8 ruptures and releases the water-blocking agent inside after encountering water, so that the water-blocking agent composed of sodium polyacrylate and silica nanoparticles inside forms a gel to perform water-blocking self-repair, thereby preventing water from radially entering the cable. Moreover, after the volume expands, the water-absorbing and expanding belt 7 can exert a certain squeezing force on the microcapsule water-blocking mechanism 8, thereby facilitating the rapid flow of the water-blocking agent in the microcapsule water-blocking mechanism 8, thereby further improving the radial water-blocking effect and efficiency. At the same time, when the waterproof cable is in use, the middle conductor core 1 is tightly fitted with the inner wall of the first sealing barrier 2, and the other five conductor cores 1 are tightly fitted with the outer side of the first sealing barrier 2 and the inner wall of the second sealing barrier 3, so that the six conductor cores 1 can contact each other through the contact groove 10 opened in the second sealing barrier 3 and the first sealing barrier 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 barrier 2 and the second sealing barrier 3, both of which are made of rubber material, so that water can be prevented from entering and contacting the conductor core 1 along the length direction of the cable, thereby facilitating longitudinal water blocking, thereby achieving the purpose of multi-directional water blocking, so that the waterproof cable can exert stable electrical performance in various complex environments and harsh conditions, providing reliable guarantee for power transmission.

[0022] Embodiment 2: The multi-directional water-blocking waterproof cable in this embodiment, based on the embodiment 1, can protect the outer sheath 9 through the protection mechanism, thereby preventing the outer sheath 9 from being damaged and leaking water, thereby further improving the waterproof effect. For the specific structure, refer to the attached Figure 7-Figure 9 As shown, four groups of snap-in grooves 91 are provided on the outside of the outer sheath 9, with four in each group, and the opening directions of each adjacent group of snap-in grooves 91 are opposite, and the snap-in grooves 91 are arranged in an arc shape. Four protective mechanisms are provided on the outside of the outer sheath 9, and the opening directions of the two upper and lower adjacent protective mechanisms are opposite, and one protective mechanism consists of two protective sleeves 11, and the two protective sleeves 11 are connected by a bending limit mechanism 12. A fixed iron wire 111 and two fixed rubber protrusions 112 are installed on the inner side wall of the protective sleeve 11, and fixed rubber protrusions 112 are provided on the upper and lower sides of the fixed iron wire 111. The 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 protrusions 112 are matched with the snap-in grooves 91. A ball 113 is installed on the outer side of the protective sleeve 11, and the bending limit mechanism 12 is arranged in an "X" shape, and the material of the bending limit mechanism 12 is polyethylene rope.

[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 in the protective sleeve 11 so that the inner wall of the protective sleeve 11 is tightly fitted and fixed to the outer side of the outer sheath 9. At the same time, the fixed rubber protrusion 112 on the inside of the protective sleeve 11 is matched 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. As shown above, multiple protective mechanisms are installed in sequence. The opening directions of the two adjacent protective mechanisms above and below are opposite. In this way, through the use of multiple coordinated protective mechanisms, it is convenient to protect the outside of the outer sheath 9. Since the protective sleeve 11 is made of rubber, it will not affect the winding and reeling of the entire cable in the later stage.

[0024] When the waterproof cable is pulled, the protective sleeve 11 in the protective mechanism contacts the working area, thereby preventing the outer sheath 9 from contacting the working area, facilitating the protection of the outer sheath 9 and preventing the outer sheath 9 from being worn and leaking water, thereby further improving the waterproof performance of the waterproof cable. When the waterproof cable is bent, the "X"-shaped bending limiter 12 made of polyethylene rope can block the bending degree of the waterproof cable to prevent the waterproof cable from bending too much and causing the outer sheath 9 to rupture and leak water. Since the multiple protective mechanisms are not related to each other and are designed as separate modular devices, when one of the protective mechanisms is damaged and needs to be replaced, as shown above, just manually bend the two ends of the protective sleeve 11 and the fixing wire 111 outward to separate the protective sleeve 11 and the fixing wire 111 from the outer sheath 9. At this time, the fixed rubber protrusion 112 and the clamping groove 91 are separated, so that one of the protective mechanisms can be replaced. There is no need to replace multiple protective mechanisms, which can meet different usage needs.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection 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 expansion belt (7), and the outer side surface of the water-absorbing expansion belt (7) is connected to a microcapsule water-blocking mechanism (8) with a microcapsule water-blocking agent inside. The outer side surface of the water-absorbing expansion belt (7) is installed with an outer sheath (9). The outer side of a middle conductor fiber core (1) is sheathed with a first sealing barrier (2). The outer side surface of the water-absorbing expansion belt (7) is provided with accommodating grooves (71) and flow grooves (72) at equal intervals, and a row of flow grooves (72) is connected 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 expansion belt (7) is made of PU material. Four groups of snap-in grooves (91) are provided on the outer side of the outer sheath (9), each group being provided with Four, and the opening directions of each adjacent group of clamping grooves (91) are opposite, the clamping grooves (91) are arranged in an arc shape, the outer side of the outer sheath (9) is provided with four protective mechanisms, the opening directions of the two upper and lower adjacent protective mechanisms are opposite, and one protective mechanism is composed of two protective sleeves (11), the two protective sleeves (11) are connected by a bending limit mechanism (12), the inner side wall of the protective sleeve (11) is installed 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, the fixed rubber protrusion (112) and the clamping groove (91) are matched with each other in a concave and convex manner, the bending limit mechanism (12) is arranged in an "X" shape, and the material of the bending limit mechanism (12) is polyethylene rope material.

2. The multi-directional water-blocking waterproof cable according to claim 1, characterized in that: The center 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 contact with the inner wall of the second sealing barrier (3).

3. The 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 contact with the five conductor fiber cores (1) arranged in a circle.

4. The 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. The arc-shaped grooves provided on the inner wall of the second sealing barrier (3) are in 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 contact partial areas of two adjacent conductor fiber cores (1).

6. The multi-directional water-blocking waterproof cable according to claim 1, characterized in that: A ball (113) is mounted on the outer side of the protective sleeve (11).

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