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

Abstract

The utility model discloses a heat insulation composite material lining layer medium voltage fireproof cable comprising a cable main body, a connecting assembly is installed outside the cable main body, the connecting assembly comprises a connecting ring sleeved outside the cable main body in a sliding mode, two symmetrically arranged hinged supports are arranged on the outer wall of the circumference of the connecting ring, and the hinged supports are connected with the cable main body. 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 utility model, through the arrangement of the connecting assembly, the design can effectively replace the pulling force bearing function of the cable joint, the cable is ensured to be still stable and not loose when encountering external force, and thus the overall use efficiency and reliability of the cable are significantly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of heat-insulating composite material inner liner middle pressure fireproof cable. BACKGROUND

[0002] With the rapid development of modern architecture and electrical system, as the important carrier of power and signal transmission, the fireproof performance of cable is paid more and more attention. In the event of fire, the burning of cable may cause greater fire risk and lead to power and signal transmission interruption, which has a serious impact on personnel evacuation and rescue work.

[0003] Through retrieval, the utility model of patent announcement number CN220509750U discloses a kind of heat-insulating composite material inner liner middle and high pressure fireproof cable, including conductor, the outer surface of the conductor is fixedly connected with composite inner liner, the outer surface of the composite inner liner is wound with wrapping layer, the outer surface of the wrapping layer is fixedly connected with outer sheath, the outer surface of the outer sheath is sleeved with glass fiber sheath, the bottom of the outer sheath is provided with slot.

[0004] As the above-mentioned cable, in order to ensure its normal use, various protective materials will be added, and the overall quality is high due to the wire core itself. When it is connected with another cable, the connection will bear a large tensile force. If it is subjected to external force, the connection may be loose, and there is room for improvement. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of heat-insulating composite material inner liner middle pressure fireproof cable to solve the problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of heat-insulating composite material inner liner middle pressure fireproof cable, including cable main body, the cable main body outside installation has connecting assembly, the connecting assembly includes the connecting ring that cable main body outside slidingly covers, the connecting ring circumferential outer wall is provided with two symmetrically arranged hinges, two the hinge inside is hingedly connected with one screw rod, two the screw rod outside is threadedly covered with one plug-in connector, the connecting ring circumferential outer wall is provided with two symmetrically arranged limit frame, two The limit frame and two hinges are staggered, the limit frame is provided with the clamping groove matched with plug-in connector inside.

[0007] The design can effectively replace the tension bearing function of the cable connection, ensure that the cable is still stable and does not loosen when subjected to external force, thereby significantly improving the overall use performance and reliability of the cable, the movable end of the driving screw, the screw approaches the opposite connecting ring along the hinge base, and then the screw is inserted into the groove of the opposite limiting frame, then the plug-in connector is rotated, the plug-in connector is rotated on the screw and inserted into the opposite limiting frame, when the plug-in connector is fully inserted into the limiting frame, the position of the screw relative to the limiting frame is fixed, and the screw can replace the connection to bear the tension, effectively avoiding loosening.

[0008] As a further preferred embodiment of the present technical solution, the cable body circumferential outer wall is slidably sleeved with a mounting ring, the mounting ring circumferential outer wall is provided with a thread, the connecting ring is threadedly sleeved outside the mounting ring, one end of the mounting ring is rotatably connected with a plurality of equally spaced pressure plates, and the mutually approaching outer walls of the plurality of pressure plates are each provided with a plurality of anti-skid lines.

[0009] As a further preferred embodiment of the present technical solution, the cable body includes a plurality of equally spaced wire cores, a composite inner liner is wound around the outer portions of the plurality of wire cores, a filling layer is filled between the composite inner liner and the plurality of wire cores, an armor layer is wound around the outer portion of the composite inner liner, an insulating layer is sleeved outside the armor layer, a wear-resistant layer is sleeved outside the insulating layer, and a paint layer is coated on the outer portion of the wear-resistant layer.

[0010] As a further preferred embodiment of the present technical solution, the composite inner liner top outer wall one side and bottom outer wall other side are each provided with a avoiding slot, and the avoiding slot bottom outer wall is provided with a adhesive layer.

[0011] As a further preferred embodiment of the present technical solution, the composite inner liner is composed of a composite material of PVC material and silicone rubber, the silicone rubber is close to the armor layer, the inner liner wrapped around the outer portion of the wire core is made of PVC material, which can slow down heat transfer to some extent, the outer silicone rubber is a high-performance thermal insulation material, which can further increase the thermal insulation effect of the inner liner, and the silicone rubber can also replace the wire core to withstand the extrusion caused by the armor deformation, 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 the wear-resistant layer is internally provided with a flame retardant and an antioxidant.

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

[0014] As a further preferred embodiment of the present technical solution, the mutually distant outer walls of the plurality of pressure plates are each provided with an arc surface, and the connecting ring circumferential inner wall can be perfectly matched with the arc surface.

[0015] The utility model provides a kind of heat-insulating composite material inner liner middle pressure fireproof cable, with following beneficial effects:

[0016] (1) the utility model discloses a connecting assembly is set, this design can effectively replace the tension bearing function of cable connecting place, ensure that cable is still firm when encountering external force and does not loosen, to significantly improve the overall use efficiency and reliability of cable, the movable end of dial screw, screw rod is close to opposite connecting ring along hinged base, then screw rod is inserted in the recess of opposite limit frame, then rotate the plug connector, plug connector rotates on screw rod and is inserted into opposite limit frame, when plug connector is completely inserted inside limit frame, the position of screw rod relative to limit frame is also fixed, screw rod can replace connecting place to bear tension, effectively avoid loosening.

[0017] (2) the utility model discloses by setting inner liner and filling layer, the inner liner of wire core outer wrapping is made of PVC material, which can slow down heat transfer to some extent, while the external silicone rubber is a kind of high-performance heat-insulating material, can further increase the heat-insulating effect of inner liner, and silicone rubber can also replace wire core to bear extrusion generated by armored deformation, effectively avoid damaging wire core. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall first visual angle structure schematic diagram of the utility model;

[0019] Figure 2 It is the overall second visual angle structure schematic diagram of the utility model;

[0020] Figure 3 It is the connecting assembly enlarged structure schematic diagram of the utility model;

[0021] Figure 4 It is the inner liner enlarged structure schematic diagram of the utility model;

[0022] In the drawing: 1, cable main body;2, connecting assembly;101, wire core;102, composite inner liner;103, armored layer;104, insulating layer;105, wear-resistant layer;106, coating layer;107, filling layer;108, avoiding groove;109, viscose layer;201, mounting ring;202, connecting ring;203, hinged base;204, screw rod;205, plug connector;206, limit frame;207, pressing plate;208, antiskid pattern. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model.

[0024] The utility model provides technical scheme: as Figure 1 AndFigure 3 As shown in the embodiment, the heat-insulating composite inner lining layer of the fireproof cable includes a cable body 1, and a connecting assembly 2 is mounted outside the cable body 1. The connecting assembly 2 includes a connecting ring 202 which is slidably sleeved outside the cable body 1. Two hinge seats 203 are arranged on the circumferential outer wall of the connecting ring 202. One screw rod 204 is hingedly connected inside each of the two hinge seats 203. One plug connector 205 is threadedly sleeved outside each of the two screw rods 204. Two limiting frames 206 are symmetrically arranged on the circumferential outer wall of the connecting ring 202. The two limiting frames 206 are arranged in an interlaced manner with the two hinge seats 203. A clamping groove which is adapted to the plug connector 205 is arranged inside each of the two limiting frames 206.

[0025] The movable end of the screw rod 204 is pushed, the screw rod 204 moves along the hinge seat 203 and approaches the opposite connecting ring 202, then the screw rod 204 is inserted into the groove of the opposite limiting frame 206, the plug connector 205 is rotated 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 connecting part to bear the tension force, thereby effectively avoiding loosening of the connecting part.

[0026] A mounting ring 201 is slidably sleeved on the circumferential outer wall of the cable body 1. Threaded lines are arranged on the circumferential outer wall of the mounting ring 201. The connecting ring 202 is threadedly sleeved outside the mounting ring 201. A plurality of pressing plates 207 are rotationally connected to one end of the mounting ring 201 at equal intervals. Anti-skid lines 208 are arranged on the mutually approaching outer walls of the plurality of pressing plates 207.

[0027] The connecting ring 202 is rotated, the connecting ring 202 rotates and approaches in the direction of the pressing plate 207. Due to the anti-skid lines 208 on the bottom of the pressing plate 207, a part of the pressing plate 207 is located at the top of the mounting ring 201. When the connecting ring 202 moves and passes the pressing plate 207, the anti-skid lines 208 on the bottom of the pressing plate 207 are pressed into the cable body 1. Under the friction force of the pressing plate 207 and the cable body 1, the position of the mounting ring 201 is fixed. According to the same steps, the other mounting ring 201 outside the cable is fixed by repeating the operation.

[0028] As shown in Figure 1 As shown in FIGS. 1 and 2, the cable body 1 includes a plurality of wire cores 101 which are distributed at equal intervals. A composite inner lining layer 102 is wound outside the plurality of wire cores 101. A filling layer 107 is filled between the composite inner lining layer 102 and the plurality of wire cores 101. An armor layer 103 is wound outside the composite inner lining layer 102. An insulation layer 104 is sleeved outside the armor layer 103. The insulation layer 104 is made of polyethylene material. A wear-resistant layer 105 is sleeved outside the insulation layer 104. A paint layer 106 is coated outside the wear-resistant layer 105.

[0029] As Figure 4 shown, the composite inner lining layer 102 top outer wall one side and the bottom outer wall the other side are provided with a relief groove 108, one of which is provided with an adhesive layer 109 at the bottom outer wall, and the two relief grooves 108 cooperate to ensure that the composite inner lining layer 102 is wound up under the premise of being flat enough, and the connection is also tight enough, without gaps.

[0030] As Figure 4 shown, the composite inner lining layer 102 is composed of a composite material of PVC material and silicone rubber, and the silicone rubber is close to the armored layer 103. The 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, the silicone rubber also has good flame retardant performance and electrical insulation performance. PVC is a commonly used cable inner lining material with good flame retardant performance and mechanical performance. PVC material also has certain thermal insulation performance, which can slow down the heat transfer 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 layer 102, and the silicone rubber can also replace the core 101 to withstand the extrusion caused by the armored deformation, effectively avoiding damage to the core 101.

[0031] As Figure 2 shown, the wear-resistant layer 105 is made of butadiene rubber, and the wear-resistant layer 105 is internally added with a flame retardant and an antioxidant. The material has excellent wear resistance, effectively avoiding damage when it is rubbed. The flame retardant can make the fireproof effect good enough.

[0032] As Figure 1 and Fig. 2, the paint layer 106 uses acrylic paint. When the paint is on fire, some of its substances will decompose into carbon dioxide and water vapor, forming a thermal insulation layer to prevent heat transfer and protect the cable from fire damage.

[0033] As Figure 3 shown, the outer walls of the plurality of pressing plates 207 are arc-shaped, and the circumferential inner wall of the connecting ring 202 can be perfectly matched with the arc-shaped surface, so that the contact area of the two is larger, which is beneficial to disperse the load received by the connecting ring 202, thereby avoiding the deformation of the connecting ring 202 due to excessive stress.

[0034] The utility model provides a kind of heat-insulating composite material inner lining layer medium-pressure fireproof cable, specific working principle as follows:

[0035] When the device is in operation, after the core 101 of the cable is connected, the connecting ring 202 is first rotated, and the connecting ring 202 is moved along the direction of the pressing plate 207. Due to the existence of the anti-skid lines 208 on the bottom of the pressing plate 207, a part of the pressing plate 207 is located on the top of the mounting ring 201. When the connecting ring 202 moves and passes through the pressing plate 207, the anti-skid lines 208 on the bottom of the pressing plate 207 will be pressed into the cable body 1. Under the friction force between the pressing plate 207 and the cable body 1, the position of the mounting ring 201 is firmly fixed. According to the same steps, the other mounting ring 201 outside the cable is fixed. The movable end of the screw rod 204 is rotated, the screw rod 204 moves along the hinge base 203 and approaches the opposite connecting ring 202, and then the screw rod 204 is inserted into the groove of the opposite limiting frame 206. Then, the plug-in connector 205 is rotated, and the plug-in connector 205 is inserted into the opposite limiting frame 206 while rotating on the screw rod 204. When the plug-in 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 connecting part to bear the tension force, effectively avoiding loosening. The inner liner 102 wrapped outside the core 101 is made of PVC material, which can slow down the heat transfer to a certain extent. The outer silicon rubber is a high-performance thermal insulation material, which can further increase the thermal insulation effect of the inner liner 102. The silicon rubber can also replace the core 101 to bear the extrusion caused by the armor deformation, effectively preventing the core 101 from being damaged.

[0036] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A thermally insulated composite mid-pressure fire resistant cable comprising a cable body (1), characterised in that: The cable body (1) is externally provided with a connecting assembly (2), the connecting assembly (2) comprises a connecting ring (202) which is slidably sleeved outside the cable body (1), the connecting ring (202) is provided with two symmetrical hinge bases (203) on the circumferential outer wall, one screw rod (204) is hingedly connected inside each of the two hinge bases (203), one plug connector (205) is threadedly sleeved outside each of the two screw rods (204), the connecting ring (202) is provided with two symmetrical limiting frames (206) on the circumferential outer wall, the two limiting frames (206) and the two hinge bases (203) are staggered, and the limiting frame (206) is provided with a clamping groove which is matched with the plug connector (205) in the inside.

2. A thermally insulated composite material inner pressure fire resistant cable according to claim 1, characterized in that: The cable body (1) is slidably sleeved with a mounting ring (201) 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), and the mounting ring (201) is rotatably connected with a plurality of equidistantly distributed pressing plates (207) at one end, and the outer walls of the pressing plates (207) which are close to each other are all provided with a plurality of anti-skid lines (208).

3. A thermally insulated composite material inner pressure fire resistant cable according to claim 1, characterized in that: The cable body (1) comprises a plurality of equidistantly distributed wire cores (101), a composite inner sheath layer (102) is wound outside the plurality of wire cores (101), a filling layer (107) is filled between the composite inner sheath layer (102) and the plurality of wire cores (101), an armor layer (103) is wound outside the composite inner sheath layer (102), an insulation layer (104) is sleeved outside the armor layer (103), a wear-resistant layer (105) is sleeved outside the insulation layer (104), and a paint layer (106) is coated outside the wear-resistant layer (105).

4. A thermally insulated composite material inner pressure fire resistant cable according to claim 3, characterized in that: The top outer wall of the composite inner sheath layer (102) is provided with an avoiding groove (108) on one side, and the bottom outer wall is provided with an avoiding groove (108) on the other side.

5. A thermally insulated composite material inner pressure fire resistant cable according to claim 3, characterized in that: The paint layer (106) is made of acrylic paint.

6. A thermally insulated composite material inner pressure fire resistant cable according to claim 2, characterized in that: The outer walls of the pressing plates (207) which are away from each other are all provided with arc surfaces, and the circumferential inner wall of the connecting ring (202) can be matched with the arc surfaces.

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