Medium-voltage fireproof cable with thermal insulation composite material lining layer

Abstract

A heat insulation composite material lining layer medium-voltage fireproof cable disclosed by the present invention comprises a cable main body, a connecting assembly is installed outside the cable main body, the connecting assembly comprises a connecting ring slidably sleeved outside the cable main body, and two symmetrically arranged hinged supports are arranged on the outer wall of the circumference of the connecting ring. A threaded rod is hinged to the interior of each of the two hinged supports, a connecting plug sleeves the exterior of each of the two threaded rods in a threaded mode, two symmetrically-arranged limiting frames are arranged on the outer wall of the circumference of the connecting ring, the two limiting frames and the two hinged supports are arranged in a staggered mode, and clamping grooves matched with the connecting plugs are formed in the limiting frames. According to the invention, through the arrangement of the connecting assembly, the design can effectively replace the pulling force bearing function of the cable joint, and the cable is ensured to be still stable and not loose when encountering external force, so that the overall use efficiency and reliability of the cable are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a medium-voltage fireproof cable with a thermal insulation composite material lining. Background Art

[0002] With the rapid development of modern buildings and electrical systems, cables, as important carriers of power and signal transmission, are becoming more and more important in terms of fire resistance. In the event of a fire, the burning of cables may lead to greater fire risks and cause power and signal transmission interruptions, which will have a serious impact on personnel evacuation and rescue work.

[0003] After searching, the invention with Chinese patent announcement number CN220509750U discloses a medium- and high-voltage fire-proof cable with a thermal insulation composite material inner lining, including a conductor, the outer surface of the conductor is fixedly connected to a composite inner liner, the outer surface of the composite inner liner is wrapped with a sheath, the outer surface of the sheath is fixedly connected to an outer sheath, the outer surface of the outer sheath is covered with a glass fiber sheath, and the bottom end of the outer sheath is provided with a notch.

[0004] For example, the cable mentioned above has various protective materials added to ensure its normal use. In addition, its own wire core has a high overall quality. When it is connected to another cable, the connection will be subjected to greater tension. If it is subjected to external force, the connection is likely to become loose. There is room for improvement. Summary of the invention

[0005] The object of the present invention is to provide a medium voltage fireproof cable with a thermal insulation composite material inner lining to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a medium-voltage fireproof cable with an inner lining of a thermal insulation composite material, comprising a cable body, a connecting assembly installed on the outside of the cable body, the connecting assembly comprising a connecting ring slidably sleeved on the outside of the cable body, the circumferential outer wall of the connecting ring is provided with two symmetrically arranged hinge seats, each of the two hinge seats is hinged with a screw rod, each of the two screw rods is threadedly sleeved with a plug connector, the circumferential outer wall of the connecting ring is provided with two symmetrically arranged limit frames, the two limit frames are staggered with the two hinge seats, and the limit frames are provided with a card slot adapted to the plug connector.

[0007] This design can effectively replace the tensile force bearing function of the cable connection, ensuring that the cable remains stable and not loose when encountering external force, thereby significantly improving the overall performance and reliability of the cable. By moving the movable end of the screw, the screw moves along the hinge seat toward the opposite connecting ring, and then the screw is inserted into the groove of the opposite limit frame. Then the plug connector is rotated, and the plug connector rotates on the screw and plugs into the opposite limit frame. When the plug connector is fully inserted into the limit frame, the position of the screw relative to the limit frame is fixed, and the screw can bear the tensile force instead of the connection, effectively preventing it from loosening.

[0008] As a further preferred embodiment of the present technical solution, the sliding sleeve of the circumferential outer wall of the cable body is provided with a mounting ring, the circumferential outer wall of the mounting ring is provided with a threaded line, the connecting ring threaded sleeve is provided outside the mounting ring, one end of the mounting ring is rotatably connected to a plurality of equidistantly distributed pressure plates, and the outer walls of the plurality of pressure plates close to each other are provided with a plurality of anti-slip grooves.

[0009] As a further preferred embodiment of the technical solution, the cable body includes a number of equally spaced cores, a composite lining layer is wound around the outside of the several cores, a filling layer is filled between the composite lining layer and the several cores, an armor layer is wound around the outside of the composite lining layer, an insulating layer is provided outside the armor layer, a wear-resistant layer is provided outside the insulating layer, and a coating layer is coated on the outside of the wear-resistant layer.

[0010] As a further preferred embodiment of the present technical solution, avoidance grooves are provided on one side of the top outer wall and the other side of the bottom outer wall of the composite lining layer, and an adhesive layer is provided on the bottom outer wall of one of the avoidance grooves.

[0011] As a further preferred embodiment of the present technical solution, the composite lining layer is a composite material composed of PVC material and silicone rubber, and the silicone rubber is close to the armor layer. The inner part of the lining layer wrapped around the outside of the wire core is made of PVC material, which can slow down the heat transfer to a certain extent, and the external silicone rubber is a high-performance thermal insulation material, which can further increase the thermal insulation effect of the inner lining layer, and the silicone rubber can also replace the wire core to withstand the extrusion caused by the deformation of the armor, effectively preventing the wire core from being damaged.

[0012] As a further preferred embodiment of the present technical solution, the wear-resistant layer is made of butadiene rubber, and a flame retardant and an antioxidant are added inside the wear-resistant layer.

[0013] As a further preferred embodiment of the present technical solution, the paint layer is made of acrylic paint.

[0014] As a further preferred embodiment of the present technical solution, outer walls of the plurality of pressure plates that are away from each other are all configured as arc-shaped surfaces, and the circumferential inner wall of the connecting ring can fit exactly with the arc-shaped surface.

[0015] The present invention provides a medium-voltage fireproof cable with a thermal insulation composite material lining, which has the following beneficial effects: (1) The present invention provides a connection component. This design can effectively replace the tensile bearing function of the cable connection, ensuring that the cable remains stable and does not loosen when subjected to external force, thereby significantly improving the overall use efficiency and reliability of the cable. The movable end of the screw is moved, and the screw moves toward the opposite connecting ring along the hinge seat. The screw is then inserted into the groove of the opposite limit frame. The plug connector is then rotated, and the plug connector rotates on the screw and is inserted into the opposite limit frame. When the plug connector is fully inserted into the limit frame, the position of the screw relative to the limit frame is fixed. The screw can replace the connection to bear the tensile force, effectively preventing it from loosening.

[0016] (2) The present invention provides an inner lining layer and a filling layer. The inner lining layer wrapped around the outer core is made of PVC material, which can slow down the heat transfer to a certain extent. The outer silicone rubber is a high-performance thermal insulation material, which can further increase the thermal insulation effect of the inner lining layer. In addition, the silicone rubber can also replace the core to withstand the extrusion caused by the deformation of the armor, thereby effectively preventing the core from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention; Figure 2 It is a schematic diagram of the overall second viewing angle structure of the present invention; Figure 3 It is a schematic diagram of the enlarged structure of the connection assembly of the present invention; Figure 4 It is a schematic diagram of the enlarged structure of the inner lining layer of the present invention; In the figure: 1. cable body; 2. connecting component; 101. core; 102. composite lining layer; 103. armor layer; 104. insulation layer; 105. wear-resistant layer; 106. coating layer; 107. filling layer; 108. avoidance groove; 109. adhesive layer; 201. mounting ring; 202. connecting ring; 203. hinge seat; 204. screw; 205. plug connector; 206. limit frame; 207. pressure plate; 208. anti-slip pattern. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The present invention provides a technical solution: Figure 1 and Figure 3As shown, in this embodiment, a medium-voltage fireproof cable with an inner lining of a thermal insulation composite material includes a cable body 1, a connecting component 2 is installed on the outside of the cable body 1, and the connecting component 2 includes a connecting ring 202 that is slidably sleeved on the outside of the cable body 1, and the circumferential outer wall of the connecting ring 202 is provided with two symmetrically arranged hinge seats 203, and the two hinge seats 203 are each hinged with a screw 204 inside, and the two screws 204 are threadedly sleeved on the outside with a plug connector 205, and the circumferential outer wall of the connecting ring 202 is provided with two symmetrically arranged limit frames 206, the two limit frames 206 are staggered with the two hinge seats 203, and the limit frames 206 are provided with a card slot adapted to the plug connector 205.

[0020] By moving the movable end of the screw rod 204, the screw rod 204 moves along the hinge seat 203 toward the opposite connecting ring 202, and then the screw rod 204 is inserted into the groove of the opposite limiting frame 206, and then the plug connector 205 is rotated, and the plug connector 205 rotates on the screw rod 204 and is inserted into the opposite limiting frame 206. When the plug connector 205 is completely inserted into the limiting frame 206, the position of the screw rod 204 relative to the limiting frame 206 is fixed, and the screw rod 204 can replace the connection to bear the tension, effectively preventing it from loosening.

[0021] A mounting ring 201 is provided on the sliding sleeve of the circumferential outer wall of the cable body 1, and a threaded line is provided on the circumferential outer wall of the mounting ring 201. A connecting ring 202 is threadedly sleeved on the outside of the mounting ring 201. One end of the mounting ring 201 is rotatably connected to a plurality of equally distributed pressure plates 207, and the outer walls of the plurality of pressure plates 207 close to each other are provided with a plurality of anti-slip grooves 208.

[0022] The connecting ring 202 is rotated and the connecting ring 202 will rotate and approach the pressure plate 207. Due to the existence of the anti-slip groove 208 at the bottom of the pressure plate 207, a part of the pressure plate 207 will be at the top position of the installation ring 201. When the connecting ring 202 moves and passes through the pressure plate 207, the anti-slip groove 208 at the bottom of the pressure plate 207 will be squeezed into the cable body 1. Under the friction between the pressure plate 207 and the cable body 1, the position of the installation ring 201 will be firmly fixed. According to the same steps, repeat the operation to fix the installation ring 201 on the outside of another cable.

[0023] like Figure 1 As shown in FIG2 , the cable body 1 includes a plurality of equally spaced cores 101 , a composite inner lining layer 102 is wound around the outside of the plurality of cores 101 , a filling layer 107 is filled between the composite inner lining layer 102 and the plurality of cores 101 , an armor layer 103 is wound around the outside of the composite inner lining layer 102 , an insulating layer 104 is sheathed around the outside of the armor layer 103 , the insulating layer 104 is made of polyethylene material, a wear-resistant layer 105 is sheathed around the outside of the insulating layer 104 , and a coating layer 106 is coated on the outside of the wear-resistant layer 105 .

[0024] like Figure 4 As shown, avoidance grooves 108 are provided on one side of the top outer wall and the other side of the bottom outer wall of the composite lining layer 102, and an adhesive layer 109 is provided on the bottom outer wall of one of the avoidance grooves 108. With the cooperation of the two avoidance grooves 108, when the composite lining layer 102 is rolled up, the connection is tight enough without any gaps while ensuring that the composite lining layer 102 is sufficiently flat.

[0025] like Figure 4 As shown, the composite inner lining 102 is a composite material composed of PVC material and silicone rubber, and the silicone rubber is close to the armor layer 103. Silicone rubber is a high-performance thermal insulation material with excellent high temperature resistance, low temperature resistance, oxidation resistance, ozone resistance and radiation resistance. At the same time, silicone rubber also has good flame retardant properties and electrical insulation properties. PVC is a commonly used cable inner lining material with good flame retardant properties and mechanical properties. PVC material also has certain thermal insulation properties, which can slow down the transfer of heat to a certain extent. The external silicone rubber is a high-performance thermal insulation material that can further increase the thermal insulation effect of the inner lining 102, and silicone rubber can also replace the core 101 to withstand the extrusion caused by the deformation of the armor, effectively preventing the core 101 from being damaged.

[0026] like Figure 2 As shown, the wear-resistant layer 105 is made of butadiene rubber, and flame retardants and antioxidants are added inside the wear-resistant layer 105. The material has excellent wear resistance and can effectively prevent it from being damaged by friction, while the flame retardant can make its fireproof effect good enough.

[0027] like Figure 1 As shown in FIG. 2 , the coating layer 106 is made of acrylic paint. When the coating is exposed to fire, part of the paint will decompose into carbon dioxide and water vapor to form a heat insulation layer to prevent heat transfer, thereby protecting the cable from fire damage.

[0028] like Figure 3 As shown, the outer walls of several pressure plates 207 that are away from each other are all set as arc surfaces, and the circumferential inner wall of the connecting ring 202 can just fit with the arc surface, so that the contact area between the two is larger, which is conducive to dispersing the load on the connecting ring 202, thereby avoiding deformation of the connecting ring 202 due to excessive force.

[0029] The present invention provides a medium-voltage fireproof cable with a thermal insulation composite material lining, and the specific working principle is as follows: When the device is working, after the core 101 of the cable is connected, first turn the connecting ring 202 to rotate, and the connecting ring 202 will rotate and approach along the direction of the pressure plate 207. Due to the existence of the anti-slip groove 208 at the bottom of the pressure plate 207, a part of the pressure plate 207 will be at the top position of the installation ring 201. When the connecting ring 202 moves and passes through the pressure plate 207, the anti-slip groove 208 at the bottom of the pressure plate 207 will be squeezed into the inside of the cable body 1. Under the friction between the pressure plate 207 and the cable body 1, the position of the installation ring 201 will be firmly fixed. According to the same steps, repeat the operation to fix the installation ring 201 outside the other cable, turn the movable end of the screw rod 204, and the screw rod 204 will approach the opposite connecting ring 202 along the hinge seat 203, and then the screw rod 2 04 is inserted into the groove of the opposite limit frame 206, and then the plug connector 205 is rotated. The plug connector 205 rotates on the screw rod 204 and is inserted into the opposite limit frame 206. When the plug connector 205 is fully inserted into the limit frame 206, the position of the screw rod 204 relative to the limit frame 206 is fixed, and the screw rod 204 can replace the connection to withstand the tension, effectively preventing it from loosening. The inner lining layer 102 wrapped around the outside of the core 101 is made of PVC material, which can slow down the heat transfer to a certain extent, and the external silicone rubber is a high-performance thermal insulation material, which can further increase the thermal insulation effect of the inner lining layer 102, and the silicone rubber can also replace the core 101 to withstand the extrusion caused by the deformation of the armor, effectively preventing the core 101 from being damaged.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medium voltage fireproof cable with a thermal insulation composite material lining, comprising a cable body (1), characterized in that: A connecting assembly (2) is installed on the outside of the cable body (1), and the connecting assembly (2) comprises a connecting ring (202) slidably sleeved on the outside of the cable body (1), the connecting ring (202) having a circumferential outer wall provided with two symmetrically arranged hinge seats (203), each of the two hinge seats (203) having a screw rod (204) hinged inside, each of the two screw rods (204) having a plug connector (205) threadedly sleeved outside, the connecting ring (202) having a circumferential outer wall provided with two symmetrically arranged limit frames (206), the two limit frames (206) being staggered with the two hinge seats (203), and each of the limit frames (206) having a slot adapted to the plug connector (205) arranged inside.

2. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 1, characterized in that: The cable body (1) is provided with a mounting ring (201) on a sliding sleeve on the circumferential outer wall, the mounting ring (201) is provided with a threaded line on the circumferential outer wall, the connecting ring (202) is threadedly sleeved outside the mounting ring (201), one end of the mounting ring (201) is rotatably connected to a plurality of equally spaced pressure plates (207), and the outer walls of the plurality of pressure plates (207) close to each other are each provided with a plurality of anti-slip grooves (208).

3. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 1, characterized in that: The cable body (1) comprises a plurality of equally spaced cores (101), a composite inner lining layer (102) is wound around the outside of the plurality of cores (101), a filling layer (107) is filled between the composite inner lining layer (102) and the plurality of cores (101), an armor layer (103) is wound around the outside of the composite inner lining layer (102), an insulating layer (104) is sheathed around the outside of the armor layer (103), a wear-resistant layer (105) is sheathed around the outside of the insulating layer (104), and a coating layer (106) is coated on the outside of the wear-resistant layer (105).

4. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 3, characterized in that: The composite lining layer (102) is provided with avoidance grooves (108) on one side of the top outer wall and on the other side of the bottom outer wall, wherein an adhesive layer (109) is provided on the bottom outer wall of one of the avoidance grooves (108).

5. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 3, characterized in that: The composite lining layer (102) is a composite material composed of PVC material and silicone rubber, and the silicone rubber is close to the armor layer (103).

6. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 3, characterized in that: The wear-resistant layer (105) is made of butadiene rubber, and a flame retardant and an antioxidant are added inside the wear-resistant layer (105).

7. A medium voltage fireproof cable with thermal insulation composite material lining according to claim 3, characterized in that: The paint layer (106) is made of acrylic paint.

8. The medium voltage fireproof cable with thermal insulation composite material inner lining according to claim 2, characterized in that: The outer walls of the plurality of pressing plates (207) that are away from each other are all configured as arc-shaped surfaces, and the circumferential inner wall of the connecting ring (202) can fit exactly with the arc-shaped surface.

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