A flexible fireproof and explosion-proof device for cable joint and construction method thereof

Abstract

The present invention discloses a flexible fireproof and explosion-proof device for a cable joint, comprising an explosion-proof net and a plurality of lock buckles, wherein the explosion-proof net is used to wrap the surface of the intermediate joint of the cable, the lock buckle is installed on the explosion-proof net, the lock buckle comprises a bottom box, an upper cover and a locking nut, the upper cover is detachably installed on the upper end of the bottom box, the left and right ends of the bottom box are respectively provided with an inlet and an outlet, a cavity for accommodating the mesh wire of the explosion-proof net is formed in the bottom box, a screw rod is also provided in the bottom box, the screw rod extends out of the upper cover and is connected to the locking nut, and the upper cover and the bottom box are integrated by the connection between the locking nut and the screw rod. The device has a simple structure and is convenient to produce and use. The present invention also discloses a construction method of the device, which has simple steps and convenient construction, and can be easily installed in various narrow environments, and has a good explosion-proof function.

Description

Technical Field

[0001] The invention relates to the field of power grid construction devices, in particular to a flexible fireproof and explosion-proof device for a cable joint and a construction method thereof. Background Art

[0002] The basic information of cable trenches is easily distorted, lacking and lagging. At present, it mainly relies on manual management, which is backward. The existing distribution network cable trenches are basically narrow, which makes it difficult to lay cables. The cable wells lack unified numbers, cable information boards and warning signs, and the cables are placed in a mess and squeezed together. The space is limited, and it is difficult to install explosion-proof devices at the middle head position, which brings hidden dangers to power supply safety.

[0003] In order to solve the problem of using products from different cable connector manufacturers, the existing cable connector explosion-proof devices have a large size and are difficult to install. They often conflict with the on-site cable trench and cannot be used. In addition, the connector explosion-proof device uses high-strength rigid materials (such as stainless steel and other metal materials), which have poor fireproof effects. After a fire occurs, it cannot effectively prevent the spread of the fire and cannot achieve the intended effect. At the same time, since the end of the metal explosion-proof device needs to shrink to match the cable connector, there is a problem of uneven internal pressure at the end. When the cable connector explodes, the huge energy of the arc impacts the inner wall of the explosion-proof device, and the impact force distribution generated inside will be distorted at the end, causing some points at the end to bear much greater impact stress than other parts, making the end more likely to be blown up. Because the box body is made of metal material, the fragments produced by the explosion are more likely to cause safety hazards to surrounding cables, equipment and even personnel. Summary of the invention

[0004] In order to solve the above problems, the first purpose of the present invention is to provide a flexible fire and explosion proof device for cable joints, which can enable the cable head to be easily installed in a narrow space, and at the same time has an explosion-proof function to avoid a major accident caused by an explosion of an intermediate cable joint.

[0005] The second object of the present invention is to provide a construction method for the flexible fire and explosion proof device of the cable joint.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a flexible fireproof and explosion-proof device for a cable joint, comprising an explosion-proof net and a plurality of locking buckles, wherein the explosion-proof net is used to wrap the surface of the cable, and the locking buckles are installed on the explosion-proof net. The locking buckles include a bottom box, an upper cover and a locking nut, and the upper cover is detachably installed on the upper end of the bottom box. The left and right ends of the bottom box are respectively provided with an entrance and an exit, and a cavity for accommodating the network cable of the explosion-proof net is formed in the bottom box. A screw is also provided in the bottom box, and the screw extends out of the upper cover and is connected to the locking nut. The upper cover and the bottom box are integrated by the connection between the locking nut and the screw, thereby tightening and locking the explosion-proof net, so that the explosion-proof net can more stably wrap the surface of the cable.

[0007] Furthermore, it also includes an explosion-proof bag, which is used to wrap the surface of the cable middle joint, and the explosion-proof net is used to wrap the surface of the explosion-proof bag; the explosion-proof bag is a bundle made of flexible fireproof material, and the bundle is provided with a storage space for accommodating the cable, and a part of the bundle is folded to form a pleated portion, and the pleated portion expands under external force to increase the storage space. When the cable joint explodes, the impact force generated will automatically expand the folded space hidden by the pleated portion, increase the volume, and buffer the explosion force, so that the huge energy generated by the explosion is buffered and absorbed by the explosion-proof bag of this design, avoiding the situation of rigid explosion-proof materials being splashed by fragments after the explosion, and at the same time, the explosion energy can be released, making the product safer. Among them, the flexible fireproof material is made of a mixture of glass fiber and rubber or PE fiber, and the ratio of glass fiber and rubber mixture can be selected between 70%-80%: 30%-20%.

[0008] Furthermore, it also includes a fireproof mud layer, which is used to wrap the surface of the cable intermediate joint, and the explosion-proof bag is used to wrap the surface of the fireproof mud layer. The fireproof mud layer is formed by evenly mixing fireproof mud and steel wool (or fine steel wires accumulated into other shapes) and then winding them on the cable surface. The steel wool serves as a fixing device and a skeleton to prevent the refractory mud from falling off;

[0009] Furthermore, several temperature sensors are installed at the two ends of the fireproof mud layer and the contact points with the cable to realize online detection and alarm functions; the preferred model of the temperature sensor is: DS18B20, the temperature measurement range is: -55℃~+125℃, and the temperature sensor can also be installed between the fireproof mud layer and the cable.

[0010] Furthermore, it also includes a binding rope, which is passed through and wrapped around the explosion-proof net. The binding rope is used to fix the explosion-proof net to the surface of the cable, and both ends of the binding rope are clamped in the lock buckle.

[0011] Furthermore, the bottom box and the upper cover are formed by one-time pressing using metal materials (such as stainless steel, magnesium-aluminum alloy, etc.).

[0012] Furthermore, the explosion-proof net is made of stainless steel or carbon steel.

[0013] Furthermore, the binding rope is made of steel wire rope, cable tie or elastic band, etc.

[0014] Furthermore, the screw is placed at the center of the cavity to divide the cavity into two cavity units, each of which is connected to an inlet and an outlet, so as to clamp the wires and binding ropes of explosion-proof nets of different diameters. As another idea of ​​this solution, a plurality of partitions can be arranged in the cavity to divide the cavity into a plurality of cavity units, so as to clamp the wires and binding ropes of explosion-proof nets of different diameters.

[0015] The present invention also discloses a construction method of the above-mentioned flexible fireproof and explosion-proof device for cable joints, and the steps are as follows:

[0016] S1. Install the temperature sensor at both ends of the cable middle joint and secure it with waterproof tape;

[0017] S2. Stir the steel wool and refractory mud evenly to form a refractory mud layer, and wrap it around the surface of the cable intermediate joint;

[0018] S3. Wrap the explosion-proof bag and explosion-proof net on the surface of the fireproof mud layer in turn, and use the binding rope to tie the explosion-proof net to the middle joint of the cable, and finally use the lock to tighten the network cable and the binding rope of the explosion-proof net.

[0019] Among them, in step S3., when installing the explosion-proof net, first install the bottom box of the lock buckle on the inner side of the explosion-proof net with intervals, and at least one bottom box should be provided at 3 to 8 mm on both sides of the explosion-proof net; when installing the bottom, fasten the mesh cable of the explosion-proof net to the cavity in the bottom box, and pass the screw on the bottom box out of the explosion-proof net; then wrap the explosion-proof net and the bottom box on the surface of the explosion-proof bag, and tie the explosion-proof net with a binding rope; finally, fasten the two ends of the binding rope to the cavity in the bottom box on both sides of the explosion-proof net, install all the upper covers on the bottom boxes respectively, and tighten the mesh cable and binding rope of the explosion-proof net through the locking nut.

[0020] The beneficial effects of the present invention are as follows: the device has a simple structure, is easy to produce and use, and is easy to install in various narrow environments by wrapping the cable surface with an explosion-proof net, then tightening the cable with a binding rope, and finally locking the cable with a lock buckle, thereby achieving a good explosion-proof function. The present invention discloses a construction method of the device, which has simple steps and is easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic cross-sectional view of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the installation of the explosion-proof net of the present invention;

[0023] Figure 3a and Figure 3b It is a schematic diagram of the structure of the explosion-proof net and the lock buckle of the present invention;

[0024] Figure 3c It is a schematic diagram of the locking nut structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the explosion-proof bag of the present invention;

[0026] Figure 5a and Figure 5b It is a schematic diagram of the explosion-proof net structure of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, a flexible fireproof and explosion-proof device for a cable joint includes a fireproof mud layer 5, a binding rope 3, an explosion-proof net 1, an explosion-proof bag 6, and a plurality of lock buckles 2. The fireproof mud layer 5, the explosion-proof bag 6, and the explosion-proof net 1 are sequentially wrapped on the surface of the middle joint of the cable 4. The binding rope 3 is connected (interspersed and wrapped) on the mesh of the explosion-proof net 1 to better wrap the explosion-proof bag 6 and the surface of the cable 4 with the explosion-proof net 1; the lock buckles 2 can be arranged at intervals on the explosion-proof net 3 to fix the binding rope 3 with the net wire of the explosion-proof net 1. As the optimal solution, the lock buckles 2 in this embodiment are arranged at both ends of the explosion-proof net 3, and can be fixed on the net wire of the explosion-proof net 3 after the binding rope 3 tightens the explosion-proof net 3.

[0029] like Figure 3a and Figure 3bAs shown, the lock buckle 2 includes a bottom box 21, an upper cover 22 and a locking nut 23. The upper cover 22 is detachably mounted on the upper end of the bottom box 21. The left and right ends of the bottom box 21 are respectively provided with a wire inlet and a wire outlet. A cavity for accommodating the mesh wire of the explosion-proof net 1 and the binding rope 3 is formed in the bottom box 21. The two ends of the binding rope 3 are clamped in the lock buckle 2. A screw 24 is also provided in the bottom box 21. The screw 24 extends out of the upper cover 22 and is connected to the locking nut 23. The upper cover 21 and the bottom box 22 are formed into one piece through the connection between the locking nut 23 and the screw 24, so as to tie and lock the mesh wire and the binding rope 3 of the explosion-proof net, so that the explosion-proof net 1 can more stably wrap the surface of the cable and conveniently wrap the outer surface of the cable connector. Among them, the outline of the upper cover 22 is not larger than the outline of the cavity, and the upper cover 22 is slidably installed on the screw 24 up and down. By adjusting the position of pressing the upper cover 22, the cavity can be made smaller, and the upper cover 22 can better press the mesh wire and binding rope 3 of the explosion-proof net 1.

[0030] Furthermore, the bottom box 21 and the upper cover 22 are formed by one-time pressing using metal materials (such as stainless steel, magnesium-aluminum alloy, etc.), and the screw rod 24 is welded and fixed to the cavity of the bottom box 21 .

[0031] Furthermore, the screw 24 is placed at the center of the cavity, dividing the cavity into two cavity units, each of which is connected to the inlet and the outlet, so as to cooperate with clamping the wires and binding ropes 3 of the explosion-proof net 1 of different diameters. In addition, the screw 24 passes through the mesh of the explosion-proof net 1, and the two cavity units can evenly accommodate the wires of the explosion-proof net 1, so that the force is evenly applied. As another idea of ​​this solution, a plurality of partitions can also be set in the cavity, which divides the cavity into a plurality of cavity units, so as to cooperate with clamping the wires and binding ropes 3 of the explosion-proof net 1 of different diameters.

[0032] Furthermore, a pin hole may be provided at the end of the screw rod 24, and an anti-drop pin may be detachably mounted on the pin hole, and the anti-drop pin blocks the locking nut 23 to prevent it from falling off, thereby ensuring the safety of the lock. There are two locking nuts 23, and the locking nuts 23 are anti-loosening nuts, which can well prevent the nuts from falling off, thereby further ensuring the safety of the device.

[0033] Further, such as Figure 3c As shown, the locking nut 23 may also be provided with at least two protruding pieces 231 for easy screwing, so that the lock buckle can be tightened and disassembled without using a wrench, thereby improving work efficiency.

[0034] Furthermore, buffer rings 25 are installed at the entrance and exit of the bottom box 21, respectively. The buffer rings are formed by connecting two semicircular arcs located at one end of the bottom box 21 and the upper cover 22, respectively. The buffer rings are made of rubber and can play a buffering role to prevent the steel bottom box and upper cover from scratching the wires and binding ropes 3 of the explosion-proof net 1. Figure 4 As shown, the explosion-proof bag 6 is a bundle sleeve 61 made of a flexible fireproof material, and the bundle sleeve 61 is provided with a storage space 60 for accommodating the cable 4. A part of the bundle sleeve 6 is folded to form a pleated portion 62, and the pleated portion 62 expands under external force to increase the storage space. When the cable joint explodes, the impact force generated will automatically expand the folded space hidden by the pleated portion 62, increase the volume, and buffer the explosion force, so that the huge energy generated by the explosion is buffered and absorbed by the explosion-proof bag 6 of this design, avoiding the situation of rigid explosion-proof materials being splashed by fragments after the explosion, and at the same time, the explosion energy can be released, making the product safer. Among them, the flexible fireproof material is made of a mixture of glass fiber and rubber or PE fiber, and the ratio of glass fiber and rubber mixture can be selected between 70%-80%: 30%-20%.

[0035] Furthermore, the fireproof mud layer 5 is formed by evenly mixing fireproof mud and steel wool (or thin steel wires accumulated into other shapes) and winding them on the surface of the cable joint. The steel wool serves as a fixing device and a skeleton to prevent the fireproof mud from falling off; a number of temperature sensors 7 can also be installed at the two ends of the fireproof mud layer 5 where they contact the cable 4 to achieve online detection and alarm functions; the preferred model of the temperature sensor 7 is: DS18B20, and the temperature measurement range is: -55℃~+125℃. The temperature sensor 7 can also be directly installed on the surface of the cable 4 or between the fireproof mud layer 5 and the cable 4. The fireproof mud layer 5 can effectively prevent fires caused by extremely high temperatures at the joints of the cable 4, and can also have a corresponding explosion-proof effect.

[0036] like Figure 5a and Figure 5b As shown, the explosion-proof net 1 includes a plurality of wire ropes 11 and a plurality of hoops 12. The wire ropes 11 are arranged in parallel, and two adjacent wire ropes 11 pass through the hoops 12. The adjacent hoops 12 are arranged at intervals of one hoop 12. When the wire ropes 11 are stretched horizontally, a mesh structure with a certain elastic contraction can be formed. Each wire rope 11 is composed of a stretchable rope core and a layer of stainless steel wire rope woven outside the rope core. Figure 3a The original state of explosion-proof net 1 is shown. Figure 3bThe figure shows the explosion-proof net 1 in a stretched state, the rope core is one of a hemp core, an asbestos core, and a metal rope core, and has good stretchability and toughness, each of the hoop rings 12 clamps two adjacent wire ropes 11, and the hoop rings 12 are arranged on the wire ropes 11 in an array of staggered positions up and down, so that the wire ropes 11 form a quadrilateral mesh, and the spacing between the two adjacent hoop rings 12 in the left and right directions is 10 to 20 cm, and the spacing between the two adjacent hoop rings 12 in the up and down directions is 3 to 8 cm. The binding rope 3 is wound around the wire rope 11 and / or the hoop ring 12, wherein, in order to avoid the binding rope 3 being inserted into the explosion-proof net 1, causing the binding rope 3 to squeeze the cable, a rope ring can be provided on the surface of each hoop ring to facilitate the insertion and winding of the binding rope.

[0037] Further, the explosion-proof net 1 is made of stainless steel or carbon steel, preferably 304 stainless steel or 316 stainless steel. Further, the binding rope 3 is made of steel wire rope, cable tie or elastic band.

[0038] The present invention also discloses a construction method of a flexible fireproof and explosion-proof device for a cable joint, the steps of which are as follows:

[0039] S1. Install the temperature sensor 7 at both ends of the middle joint of the cable 4 and fix it with waterproof tape;

[0040] S2. The steel wool and refractory mud are stirred evenly to form a refractory mud layer 5, and wrapped around the surface of the cable 4 in the middle of the joint;

[0041] S3. Wrap the explosion-proof bag 6 and explosion-proof net 1 on the surface of the fireproof mud layer 5 in sequence, and use the binding rope 3 to tie the explosion-proof net 1 to the middle joint of the cable, and finally use the lock 2 to compress the mesh wire and binding rope of the explosion-proof net. When installing the explosion-proof net, first install the bottom box 21 of the lock 2 on the inner side of the explosion-proof net 1 at intervals, and at least one bottom box 21 should be provided at 3 to 8 mm on both sides of the explosion-proof net 1; when installing the bottom, fasten the mesh wire of the explosion-proof net 1 to the cavity in the bottom box 21, and pass the screw 24 on the bottom box 21 out of the explosion-proof net 1; then wrap the explosion-proof net 1 and the bottom box 21 on the surface of the explosion-proof bag 6, and use the binding rope 3 to tie the explosion-proof net 1; finally, fasten the two ends of the binding rope 3 to the cavity in the bottom box 21 on both sides of the explosion-proof net 1, install all the upper covers 22 on the bottom box 21, and use the locking nut 23 to compress the mesh wire and binding rope 3 of the explosion-proof net 1.

[0042] The above method is simple and flexible to construct, can effectively improve efficiency, and can improve the fire prevention, explosion prevention and safety of the cable.

[0043] The above is only a preferred embodiment of the present invention, and should not be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description are still within the scope of the patent of the present invention.

Claims

1. A flexible fire and explosion proof device for cable joints, characterized in that: The utility model comprises an explosion-proof net, an explosion-proof bag, a fireproof mud layer and a plurality of lock buckles, wherein the fireproof mud layer is wrapped on the surface of the cable intermediate joint, the explosion-proof bag is used to wrap on the surface of the fireproof mud layer, the lock buckle is installed on the explosion-proof net, the lock buckle comprises a bottom box, an upper cover and a locking nut, the upper cover is detachably installed on the upper end of the bottom box, an inlet and an outlet are respectively arranged at the left and right ends of the bottom box, a cavity for accommodating the network wire of the explosion-proof net is formed in the bottom box, a screw is also arranged in the bottom box, the screw extends out of the upper cover and is connected to the locking nut, at least two convex pieces for convenient screwing are arranged on the locking nut, a buffer ring is respectively installed at the inlet and outlet of the bottom box, the The buffer ring is formed by docking two semicircular arcs located at one end of the bottom box and the upper cover respectively. The upper cover and the bottom box are integrated by connecting the locking nut and the screw. The explosion-proof bag is used to wrap the surface of the middle joint of the cable, and the explosion-proof net is used to wrap the surface of the explosion-proof bag; the explosion-proof bag is a bundle made of flexible fireproof material, and the flexible fireproof material is made of a mixture of glass fiber and rubber, and the ratio of glass fiber to rubber mixture is 70%-80%:30%-20%. The bundle is provided with an accommodating space for accommodating the cable, and a part of the bundle is folded to form a pleated portion, and the pleated portion expands under external force to increase the accommodating space.

2. A flexible fireproof and explosion-proof device for cable joints according to claim 1, characterized in that: The fireproof mud layer is formed by mixing fireproof mud and steel wool and winding the mixture on the surface of the cable.

3. A flexible fireproof and explosion-proof device for cable joints according to claim 2, characterized in that: A plurality of temperature sensors are installed on the fireproof mud layer or between the fireproof mud layer and the cable.

4. A flexible fireproof and explosionproof device for cable joints according to any one of claims 1 to 3, characterized in that: It also includes a binding rope, which is inserted into the explosion-proof net, and two ends of the binding rope are clamped in the lock buckle.

5. A flexible fireproof and explosion-proof device for cable joints according to claim 1, characterized in that: The explosion-proof net is made of stainless steel or carbon steel.

6. A flexible fireproof and explosionproof device for cable joints according to claim 1, characterized in that: The screw is placed at the center of the cavity to divide the cavity into two cavity units.

7. A construction method for a flexible fireproof and explosion-proof device for a cable joint, characterized in that: According to a flexible fireproof and explosion-proof device for cable joints according to any one of claims 1 to 6, the following steps are performed: S1. Install the temperature sensor at both ends of the cable middle joint and secure it with waterproof tape; S2. Stir the steel wool and refractory mud evenly to form a refractory mud layer, and wrap it around the surface of the cable intermediate joint; S3. Wrap the explosion-proof bag and explosion-proof net on the surface of the fireproof mud layer in turn, and use the binding rope to tie the explosion-proof net to the middle joint of the cable, and finally use the lock to tighten the network cable and the binding rope of the explosion-proof net.

8. The construction method of a flexible fireproof and explosion-proof device for a cable joint according to claim 7, characterized in that: In step S3, when installing the explosion-proof net, first install the bottom box of the lock buckle on the inner side of the explosion-proof net in an interval arrangement, and when installing the bottom, fasten the mesh cable of the explosion-proof net to the cavity in the bottom box, and pass the screw on the bottom box out of the explosion-proof net; then wrap the explosion-proof net and the bottom box on the surface of the explosion-proof bag, and tie the explosion-proof net with a binding rope; finally, fasten the two ends of the binding rope to the cavity in the bottom box on both sides of the explosion-proof net, install all the upper covers on the bottom box respectively, and tighten the mesh cable and binding rope of the explosion-proof net by locking nuts.

9. The construction method of a flexible fireproof and explosion-proof device for a cable joint according to claim 8, characterized in that: At least one bottom box is respectively arranged at 3 to 8 mm on both sides of the explosion-proof net.

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