Fire and explosion-proof structure of high-voltage cable joint and its manufacturing method

Abstract

The present invention discloses a fire- and explosion-proof structure for a high-voltage cable joint and a manufacturing method thereof. The fire- and explosion-proof structure for a high-voltage cable joint includes a fire- and explosion-proof blanket for covering the high-voltage cable joint, a locking mechanism for fixing the fire- and explosion-proof blanket to the high-voltage cable joint, and an explosion-proof net cover for covering the fire- and explosion-proof blanket and the locking mechanism. The fire- and explosion-proof blanket includes, arranged from inside to outside, a first high-silica cloth layer, a first flame-retardant rubber sheet layer, a first explosion-proof woven fabric blanket layer, a second flame-retardant rubber sheet layer, a second explosion-proof woven fabric blanket layer, and a second high-silica cloth layer. The manufacturing method includes the steps of manufacturing or assembling the fire- and explosion-proof blanket and installing the locking mechanism and the explosion-proof net cover. The present invention has the advantages of good fire- and explosion-proof performance, effectively extending the operating life of the high-voltage cable joint, and high safety in use.

Description

[Technical Field]

[0001] The present invention relates to the technical field of power systems, and more particularly to a fire-proof and explosion-proof structure for a high-voltage cable joint and a manufacturing method thereof. [Background technology]

[0002] As power grids require more power supply links and longer transmission lines, power cable intermediate joints have become essential to urban power grids. Cable intermediate joints are the weakest link in power cable lines in power grids, and must be inspected regularly after installation and during operation. Due to defects in the quality and installation of intermediate joints, or the effects of moisture, overload, and other external forces, explosions of cable intermediate joints frequently occur. The high temperatures and instantaneous energy released by the explosions can be enough to blow up or burn other cables running parallel to the cable trench, and even cause manhole covers to flip over, destroying the trench and injuring pedestrians. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a fire-proof and explosion-proof structure for a high-voltage cable joint, and a manufacturing method thereof, which overcomes the shortcomings of the prior art, has good fire-proof and explosion-proof performance, effectively extends the working life of the high-voltage cable joint, and is highly safe in use. [Means for solving the problem]

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] A fire-proof and explosion-proof structure for a high-voltage cable joint, comprising: a fire-proof and explosion-proof blanket for covering the high-voltage cable joint; a locking mechanism for fixing the fire-proof and explosion-proof blanket to the high-voltage cable joint; and an explosion-proof net cover for covering the fire-proof and explosion-proof blanket and the locking mechanism, wherein the fire-proof and explosion-proof blanket comprises, arranged in order from the inside to the outside, a first high-silica cloth layer, a first flame-retardant rubber sheet layer, a first explosion-proof woven fabric blanket layer, a second flame-retardant rubber sheet layer, a second explosion-proof woven fabric blanket layer, and a second high-silica cloth layer.

[0006] As a further improvement of the above technical solution, The first explosion-proof fabric blanket layer and the second explosion-proof fabric blanket layer each have a blanket-like structure in which multiple sets of explosion-proof webbing are partially overlapped along the width direction and sewn together with sewing thread.

[0007] The blanket-like structure is configured to partially overlap the rear set of explosion-proof webbings onto an upper surface of the front set of explosion-proof webbings.

[0008] The rear set of explosion-proof webbings overlaps the front set of explosion-proof webbings by half the width of the top surface thereof.

[0009] The extension direction of the long sides of each set of explosion-proof webbings in the first explosion-proof fabric blanket layer and the extension direction of the long sides of each set of explosion-proof webbings in the second explosion-proof fabric blanket layer are perpendicular to each other.

[0010] The extension direction of the long sides of each set of explosion-proof webbing in the first explosion-proof fabric blanket layer is perpendicular to the axial direction of the high-voltage cable joint, and the extension direction of the long sides of each set of explosion-proof webbing in the second explosion-proof fabric blanket layer is parallel to the axial direction of the high-voltage cable joint.

[0011] The locking mechanism includes a plurality of sets of explosion-proof fastening belts arranged at intervals, with locking buckles installed at the ends of the explosion-proof fastening belts.

[0012] The explosion-proof webbing, sewing thread and explosion-proof fastening belt are made of aramid, and the explosion-proof net cover is made of stainless steel.

[0013] The present invention discloses a method for manufacturing a fire-proof and explosion-proof structure for a high-voltage cable joint, (S1) a step of overlapping the explosion-proof webbings in the width direction, overlapping the rear set of explosion-proof webbings to a position halfway along the upper surface of the front set of explosion-proof webbings, and sewing the sets of explosion-proof webbings together with sewing thread to obtain a first explosion-proof fabric blanket layer and a second explosion-proof fabric blanket layer, respectively; Step (S2) of placing the first explosion-proof fabric blanket layer vertically and the second explosion-proof fabric blanket layer horizontally, and stacking the first high silica fabric layer, the first flame-retardant rubber sheet layer, the first explosion-proof fabric blanket layer, the second flame-retardant rubber sheet layer, the second explosion-proof fabric blanket layer and the second high silica fabric layer in order from top to bottom, and sewing them together with sewing thread to obtain a fire and explosion-proof blanket; (S3) covering the high voltage cable joint with the fire and explosion-proof blanket, with the first high silica fabric layer side facing inward; a step (S4) of wrapping the locking mechanism around the outside of the fire and explosion-proof blanket and locking it; and (S5) covering and locking the explosion-proof net cover on the outside of the fire and explosion-proof blanket and the locking mechanism.

[0014] The present invention further discloses another method for manufacturing a fire-proof and explosion-proof structure for a high-voltage cable joint, (S1) a step of overlapping the explosion-proof webbings in the width direction, overlapping the rear set of explosion-proof webbings to a position halfway along the upper surface of the front set of explosion-proof webbings, and sewing the sets of explosion-proof webbings together with sewing thread to obtain a first explosion-proof fabric blanket layer and a second explosion-proof fabric blanket layer, respectively; (S2) coating a first high silica fabric layer onto the high voltage cable joint; (S3) coating a first flame-retardant rubber sheet layer onto the first high-silica fabric layer; (S4) a step of vertically placing a first explosion-proof fabric blanket layer and covering the first flame-retardant rubber sheet layer with the first explosion-proof fabric blanket layer; (S5) covering a second flame-retardant rubber sheet layer on the first explosion-proof fabric blanket layer; (S6) a step of laterally placing a second explosion-proof fabric blanket layer and covering the second flame-retardant rubber sheet layer with the second explosion-proof fabric blanket layer; (S7) covering a second high silica fabric layer on the second explosion-proof fabric blanket layer; (S8) wrapping and locking the locking mechanism around the outside of the second high silica fabric layer; and (S9) covering and locking the explosion-proof net cover on the outside of the second high silica fabric layer and the locking mechanism. [Effects of the Invention]

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] The fire and explosion-proof structure of the high-voltage cable joint provided by the present invention is used to cover the high-voltage cable joint, and includes, installed from inside to outside, a first high-silica cloth layer, a first flame-retardant rubber sheet layer, a first explosion-proof woven fabric blanket layer, a second flame-retardant rubber sheet layer, a second explosion-proof woven fabric blanket layer, a second high-silica cloth layer, a locking mechanism, and an explosion-proof net cover. The multi-layer fire and explosion-proof blanket 2 not only strengthens the sealing of the high-voltage cable joint, but also increases the overall structural strength. It can cooperate with the locking mechanism 3 to provide supporting force for the fire and explosion-proof blanket from the outside, effectively preventing explosion or combustion from going from the inside to the outside, providing good fire and explosion-proof performance and effectively extending the operating life of the high-voltage cable joint. Furthermore, the fire and explosion-proof blanket and the locking mechanism are covered with an explosion-proof net cover. Even if the fire and explosion-proof blanket and the locking mechanism fail and rupture, the explosion-proof net cover can prevent debris from flying, thereby ensuring high safety in use.

[0017] The first manufacturing method of the fire and explosion-proof structure of the high-voltage cable joint provided by the present invention includes first overlapping and sewing together several sets of explosion-proof webbing to form a first explosion-proof woven blanket layer and a second explosion-proof woven blanket layer, then layering and sewing together a high silica cloth, a flame-retardant rubber sheet, the first explosion-proof woven blanket layer, the flame-retardant rubber sheet, the second explosion-proof woven blanket layer and the high silica cloth in order from top to bottom to form a fire and explosion-proof blanket, and then covering the high-voltage cable joint with the fire and explosion-proof blanket and securing it with a locking mechanism. An explosion-proof net cover is placed on the outside of the fire and explosion-proof blanket and the locking mechanism, and the multi-layer structure is pre-manufactured as a whole fire and explosion-proof blanket (i.e., a preform). This allows the size of the fire and explosion-proof blanket to be flexibly cut according to the different specifications of the applied high-voltage cable joint, and is convenient, fast and reliable to use, reduces the difficulty of temporary assembly and effectively improves installation efficiency.

[0018] The second manufacturing method of the fire-proof and explosion-proof structure of the high-voltage cable joint provided by the present invention is to first partially overlap and sew together a plurality of sets of explosion-proof webbings to produce a first explosion-proof fabric blanket layer and a second explosion-proof fabric blanket layer. In this embodiment, a flame-retardant rubber sheet is used as a semi-cylindrical coil material. Then, in order, a high-silica cloth is coated on the high-voltage cable joint, and the upper and lower two flame-retardant rubber sheet coil materials are connected and coated on the first high-silica cloth layer. The first explosion-proof fabric blanket layer is coated on the first flame-retardant rubber sheet layer, and the upper and lower two flame-retardant rubber sheet coil materials are connected. The first explosion-proof fabric blanket layer is covered with a second explosion-proof fabric blanket layer, which is then covered with a second flame-retardant rubber sheet layer, the high silica cloth is covered with the second explosion-proof fabric blanket layer, the locking mechanism is fixed and connected to the second high silica fabric layer, and an explosion-proof net cover is installed on the outside of the second high silica fabric layer and the locking mechanism. By sequentially covering and assembling the multi-layer structure, the structures of each layer are relatively independent, and if the structure of one of the layers is damaged, it is not necessary to replace the entire fire and explosion-proof blanket, but only the structure of that layer can be replaced, which effectively reduces maintenance costs. [Brief explanation of the drawings]

[0019] [Figure 1] This is an assembly schematic diagram of the fire and explosion-proof structure of a high-voltage cable joint. [Figure 2] 1 is a structural schematic diagram of a disassembled state of Example 1 of a fireproof and explosion-proof structure for a high-voltage cable joint. [Figure 3] 1 is a structural schematic diagram of the fire and explosion-proof blanket of Example 1. FIG. [Figure 4] FIG. 4 is an enlarged view of detail A of FIG. 3. [Figure 5] FIG. 10 is a schematic diagram of partial overlapping of explosion-proof webbing. [Figure 6] FIG. 10 is a structural schematic diagram of a disassembled state of Example 2 of the fireproof and explosion-proof structure for a high-voltage cable joint. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention will now be described in more detail with reference to the drawings and specific examples.

[0021] Example 1 As shown in Figures 1 to 4, the fire and explosion-proof structure of the high-voltage cable joint of this embodiment includes a fire and explosion-proof blanket 2 for covering the high-voltage cable joint 1, a locking mechanism 3 for fixing the fire and explosion-proof blanket 2 to the high-voltage cable joint 1, and an explosion-proof net cover 4 for covering the fire and explosion-proof blanket 2 and the locking mechanism 3, and the fire and explosion-proof blanket 2 includes, arranged from the inside to the outside, a first high silica cloth layer 201, a first flame-retardant rubber sheet layer 202, a first explosion-proof woven fabric blanket layer 203, a second flame-retardant rubber sheet layer 204, a second explosion-proof woven fabric blanket layer 205 and a second high silica cloth layer 206. The fire-proof and explosion-proof structure of the high-voltage cable joint is used to cover the high-voltage cable joint 1, and includes, arranged in order from inside to outside, a first high-silica cloth layer 201, a first flame-retardant rubber sheet layer 202, a first explosion-proof woven fabric blanket layer 203, a second flame-retardant rubber sheet layer 204, a second explosion-proof woven fabric blanket layer 205, a second high-silica cloth layer 206, a locking mechanism 3, and an explosion-proof net cover 4. The multi-layered fire-proof and explosion-proof blanket 2 not only strengthens the sealing of the high-voltage cable joint 1, but also improves the overall It also has great structural strength and can cooperate with the locking mechanism 3 to provide supporting force for the fire and explosion-proof blanket 2 from the outside, effectively preventing explosion or combustion from the inside to the outside, providing good fire and explosion-proof performance and effectively extending the operating life of the high-voltage cable joint 1. Furthermore, the fire and explosion-proof blanket 2 and the locking mechanism 3 are covered on the outside with an explosion-proof net cover 4, so that even if the fire and explosion-proof blanket 2 and the locking mechanism 3 malfunction and burst, the explosion-proof net cover 4 can prevent debris from flying, providing high safety in use.

[0022] 5, the first explosion-proof fabric blanket layer 203 and the second explosion-proof fabric blanket layer 205 preferably have a blanket-like structure in which a plurality of sets of explosion-proof webbings 5 ​​are partially overlapped along the width direction and sewn together with sewing thread. In this embodiment, the first explosion-proof fabric blanket layer 203 and the second explosion-proof fabric blanket layer 205 have the same structure, and both are installed in a blanket-like structure in which a plurality of sets of explosion-proof webbings 5 ​​are partially overlapped along the width direction and sewn together with sewing thread. This structure allows deformation in the event of an internal or external explosion, makes them less likely to burst, and prevents the propagation of heat and impact, thereby providing excellent explosion-proof effects.

[0023] Preferably, the blanket-like structure is configured such that the rear set of explosion-proof webbings 5 ​​are partially overlapped on the upper surface of the front set of explosion-proof webbings 5. In this embodiment, the blanket-like structure adopts a form in which the rear set of explosion-proof webbings 5 ​​are partially overlapped on the upper surface of the front set of explosion-proof webbings 5, for the purpose of facilitating the manufacture of the first explosion-proof fabric blanket layer 203 and the second explosion-proof fabric blanket layer 205 and improving the manufacturing efficiency. In other embodiments, the blanket-like structure may also adopt a form in which the second set of explosion-proof webbings 5 ​​are partially overlapped on the upper surface of the first set of explosion-proof webbings 5, and the third set of explosion-proof webbings 5 ​​are partially overlapped on the lower surface of the second set of explosion-proof webbings 5, or a form in which two second set of explosion-proof webbings 5 ​​are partially overlapped on the upper and lower surfaces of the first set of explosion-proof webbings 5, respectively, and the third set of explosion-proof webbing 5 is partially overlapped between two second set of explosion-proof webbings 5, and is not limited to this embodiment.

[0024] Preferably, the rear set of explosion-proof webbings 5 ​​are overlapped to half the width of the upper surface of the front set of explosion-proof webbings 5. In this embodiment, the explosion-proof webbings 5 ​​have a width of 100 mm, and the rear set of explosion-proof webbings 5 ​​are overlapped to half the width of the front set of explosion-proof webbings 5, and then the sets of explosion-proof webbings 5 ​​are sewn together with sewing thread, which further enhances the structural strength of the first explosion-proof fabric blanket layer 203 and the second explosion-proof fabric blanket layer 205 and improves the explosion-proof effect.

[0025] Preferably, the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the first explosion-proof fabric blanket layer 203 and the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the second explosion-proof fabric blanket layer 205 are perpendicular to each other. In this embodiment, the arrangement direction of each set of explosion-proof webbings 5 ​​constituting the first explosion-proof fabric blanket layer 203 and the arrangement direction of each set of explosion-proof webbings 5 ​​constituting the second explosion-proof fabric blanket layer 205 are perpendicular to each other, that is, the first explosion-proof fabric blanket layer 203 is arranged in the warp direction (longitudinal direction), and the second explosion-proof fabric blanket layer 205 is arranged in the weft direction (lateral direction). As a result, the first explosion-proof fabric blanket layer 203 and the second explosion-proof fabric blanket layer 205 in the fire-proof and explosion-proof blanket 2 are arranged in the longitudinal and weft directions, and the explosion-proof webbings 5 ​​overlap vertically and horizontally, which effectively increases the tension and strengthens the structural strength of the fire-proof and explosion-proof blanket 2, resulting in a high explosion and fire protection effect.

[0026] Preferably, the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the first explosion-proof fabric blanket layer 203 is perpendicular to the axial direction of the high-voltage cable joint 1, and the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the second explosion-proof fabric blanket layer 205 is parallel to the axial direction of the high-voltage cable joint 1. In this embodiment, the direction perpendicular to the axial direction of the high-voltage cable joint 1 is defined as the vertical direction, and the direction parallel to the axial direction of the high-voltage cable joint 1 is defined as the horizontal direction (the same applies hereinafter). In the fire and explosion-proof blanket 2, the first explosion-proof fabric blanket layer 203 is installed vertically, i.e., the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the first explosion-proof fabric blanket layer 203 is perpendicular to the axial direction of the high-voltage cable joint 1, and the second explosion-proof fabric blanket layer 205 is installed horizontally, i.e., the extension direction of the long sides of each set of explosion-proof webbings 5 ​​in the second explosion-proof fabric blanket layer 205 is parallel to the axial direction of the high-voltage cable joint 1. If an explosion occurs inside the high-voltage cable joint 1 and the impact force is concentrated in a certain direction, the first explosion-proof fabric blanket layer 203 can disperse the impact force to each set of explosion-proof webbings 5, thereby providing an effective buffering effect and high tear resistance.

[0027] Preferably, the locking mechanism 3 includes a plurality of sets of explosion-proof fastening belts 301 spaced apart, with locking buckles 302 installed at the ends of the explosion-proof fastening belts 301. In this embodiment, the locking mechanism 3 takes the form of an explosion-proof fastening belt 301, with a locking buckle 302 installed at one end of the explosion-proof fastening belt 301. When installing, the explosion-proof fastening belt 301 is wrapped around the outside of the fire / explosion-proof blanket 2 in the longitudinal direction, and the free end of the explosion-proof fastening belt 301 is connected to the locking buckle 302, thereby fastening the fire / explosion-proof blanket 2 to the high-voltage cable joint 1, which has the advantages of a simple structure, easy and fast installation and removal processes, and low cost.

[0028] Preferably, the explosion-proof webbing 5, sewing thread and explosion-proof clamping belt 301 are made of aramid, and the explosion-proof net cover 4 is made of stainless steel. In this embodiment, aramid fiber, whose full name is "aromatic polyamide fiber," is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high elastic modulus, high temperature resistance, acid resistance, alkali resistance and light weight. The explosion-proof webbing 5, sewing thread and explosion-proof clamping belt 301 are made of aramid and have good fire prevention performance, and the explosion-proof net cover 4 is made of stainless steel and has the advantage of high structural strength.

[0029] The method for manufacturing the fireproof and explosion-proof structure of the high-voltage cable joint of this embodiment is as follows: A step (S1) of overlapping the explosion-proof webbings 5 ​​in a partial manner along the width direction, overlapping the rear set of explosion-proof webbings 5 ​​to a position halfway along the width of the upper surface of the front set of explosion-proof webbings 5, and sewing the sets of explosion-proof webbings 5 ​​together with sewing thread to obtain a first explosion-proof fabric blanket layer 203 and a second explosion-proof fabric blanket layer 205, respectively; Step (S2) of placing the first explosion-proof fabric blanket layer 203 in the vertical direction, placing the second explosion-proof fabric blanket layer 205 in the horizontal direction, and stacking the first high silica fabric layer 201, the first flame-retardant rubber sheet layer 202, the first explosion-proof fabric blanket layer 203, the second flame-retardant rubber sheet layer 204, the second explosion-proof fabric blanket layer 205 and the second high silica fabric layer 206 in order from top to bottom, and sewing them together with sewing thread to obtain a fire and explosion-proof blanket 2; a step (S3) of covering the high voltage cable joint 1 with the fire and explosion proof blanket 2 with the first high silica fabric layer 201 side facing inward; a step (S4) of wrapping the locking mechanism 3 around the outside of the fire and explosion-proof blanket 2 and locking it; and a step (S5) of covering and locking the explosion-proof net cover 4 on the outside of the fire / explosion-proof blanket 2 and the locking mechanism 3.

[0030] The method for manufacturing the fire-proof and explosion-proof structure of the high-voltage cable joint is as follows: first, a plurality of sets of explosion-proof webbings 5 ​​are partially overlapped and sewn together to manufacture a first explosion-proof woven blanket layer 203 and a second explosion-proof woven blanket layer 205; then, a high silica cloth, a flame-retardant rubber sheet, the first explosion-proof woven blanket layer 203, the flame-retardant rubber sheet, the second explosion-proof woven blanket layer 205 and the high silica cloth are layered and sewn together in this order from top to bottom to manufacture a fire-proof and explosion-proof blanket 2; and then, the fire-proof and explosion-proof blanket 2 is attached to the high-voltage cable joint. The fire and explosion-proof blanket 2 is covered over the cable joint 1 and fixed with a locking mechanism 3, and an explosion-proof net cover 4 is installed on the outside of the fire and explosion-proof blanket 2 and the locking mechanism 3. The multi-layer structure is pre-manufactured as the entire fire and explosion-proof blanket 2 (i.e., preform), so that the size of the fire and explosion-proof blanket 2 can be flexibly cut according to the different specifications of the applied high-voltage cable joint 1, and it is convenient and quick to use and highly reliable, and it reduces the difficulty of temporary assembly construction and effectively improves construction efficiency.

[0031] Example 2 As shown in FIG. 6, the manufacturing method of the fireproof and explosion-proof structure of the high-voltage cable joint of this embodiment is as follows: A step (S1) of overlapping the explosion-proof webbings 5 ​​in a partial manner along the width direction, overlapping the rear set of explosion-proof webbings 5 ​​to a position halfway along the width of the upper surface of the front set of explosion-proof webbings 5, and sewing the sets of explosion-proof webbings 5 ​​together with sewing thread to obtain a first explosion-proof fabric blanket layer 203 and a second explosion-proof fabric blanket layer 205, respectively; (S2) covering the high voltage cable joint 1 with a first high silica fabric layer 201; (S3) covering the first flame-retardant rubber sheet layer 202 on the first high-silica fabric layer 201; Step (S4) of vertically placing the first explosion-proof fabric blanket layer 203 and covering the first flame-retardant rubber sheet layer 202 with the first explosion-proof fabric blanket layer 203; (S5) covering the first explosion-proof fabric blanket layer 203 with a second flame-retardant rubber sheet layer 204; (S6) a step of vertically placing a second explosion-proof fabric blanket layer 205 and covering the second explosion-proof fabric blanket layer 205 on the second flame-retardant rubber sheet layer 204; (S7) covering the second high silica fabric layer 206 on the second explosion-proof fabric blanket layer 205; a step (S8) of wrapping and locking the locking mechanism 3 around the outside of the second high silica fabric layer 206; and (S9) covering and locking the explosion-proof net cover 4 on the outside of the second high silica fabric layer 206 and the locking mechanism 3.

[0032] The manufacturing method of the fire-proof and explosion-proof structure of the high-voltage cable joint of Example 2 is as follows: first, a plurality of sets of explosion-proof webbings 5 ​​are partially overlapped and sewn together to manufacture a first explosion-proof woven blanket layer 203 and a second explosion-proof woven blanket layer 205; in this example, a flame-retardant rubber sheet is used as a semi-cylindrical coil material; then, in order, a high-silica cloth is covered on the high-voltage cable joint 1 to obtain a first high-silica cloth layer 201; two upper and lower flame-retardant rubber sheet coil materials are connected to cover the first high-silica cloth layer 201 to obtain a first flame-retardant rubber sheet layer 202; the first explosion-proof woven blanket layer 203 is covered on the first flame-retardant rubber sheet layer 202; and the two upper and lower flame-retardant rubber sheet coil materials are connected to form a first flame-retardant rubber sheet layer 203. The second flame-retardant rubber sheet layer 204 is then coated with a second explosion-proof fabric blanket layer 205, and the second flame-retardant rubber sheet layer 204 is then coated with a high silica cloth. The second explosion-proof fabric blanket layer 205 is then coated with a high silica cloth to form a second high silica fabric layer 206. The locking mechanism 3 is fixed and connected to the second high silica fabric layer 206, and an explosion-proof net cover 4 is installed on the outside of the second high silica fabric layer 206 and the locking mechanism 3. By sequentially coating and assembling the multi-layer structure, the structures of each layer are relatively independent. If the structure of one of the layers is damaged, it is not necessary to replace the entire fire and explosion-proof blanket 2, but only the structure of that layer can be replaced, which effectively reduces maintenance costs.

[0033] The fire and explosion-proof structure of the high-voltage cable joint manufactured by the manufacturing method of the fire and explosion-proof structure of the high-voltage cable joint provided in this embodiment is the same as that of Example 1, with the following differences: In Example 1, the multi-layer structure is manufactured as a whole in advance, simplifying the installation steps and improving construction efficiency, whereas in Example 2, the multi-layer structure is assembled by covering it in order, with each layer being relatively independent, so that if the structure of any one of the layers is damaged or malfunctioning, it is not necessary to remove and replace the entire structure, but the structure of that layer can be replaced precisely, effectively reducing maintenance costs.

[0034] The above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above examples. Improvements and modifications that can be made by those skilled in the art without departing from the technical spirit of the present invention should also be considered within the scope of protection of the present invention. [Explanation of symbols]

[0035] 1 High voltage cable joint 2 Fire and explosion-proof blankets 201 First high silica cloth layer 202 First flame-retardant rubber sheet layer 203 First explosion-proof fabric blanket layer 204 Second flame-retardant rubber sheet layer 205 Second explosion-proof fabric blanket layer 206 Second high silica cloth layer 3 Locking mechanism 301 Explosion-proof fastening belt 302 Lock Buckle 4 Explosion-proof net cover 5. Explosion-proof webbing

Claims

1. A fire- and explosion-proof structure for a high-voltage cable joint, comprising: a fire- and explosion-proof blanket (2) for covering a high-voltage cable joint (1); a locking mechanism (3) for fixing the fire- and explosion-proof blanket (2) to the high-voltage cable joint (1); and an explosion-proof net cover (4) for covering the fire- and explosion-proof blanket (2) and the locking mechanism (3), wherein the fire- and explosion-proof blanket (2) comprises, arranged in this order from inside to outside, a first high-silica cloth layer (201), a first flame-retardant rubber sheet layer (202), a first explosion-proof woven blanket layer (203), a second flame-retardant rubber sheet layer (204), a second explosion-proof woven blanket layer (205), and a second high-silica cloth layer (206).

2. 2. The fire and explosion-proof structure for a high-voltage cable joint according to claim 1, wherein the first explosion-proof woven blanket layer (203) and the second explosion-proof woven blanket layer (205) are both blanket-like structures formed by partially overlapping multiple sets of explosion-proof webbings (5) along the width direction and sewing them together with sewing thread.

3. 3. The fire and explosion-proof structure for a high-voltage cable joint according to claim 2, wherein the blanket-like structure is configured to partially overlap the rear set of explosion-proof webbings (5) on the upper surface of the front set of explosion-proof webbings (5).

4. 4. The fire and explosion-proof structure for a high-voltage cable joint according to claim 3, wherein the rear set of explosion-proof webbings (5) are partially overlapped to a position halfway across the width of the upper surface of the front set of explosion-proof webbings (5).

5. 3. The fire and explosion-proof structure for a high-voltage cable joint according to claim 2, wherein the extension direction of the long sides of each set of explosion-proof webbings (5) in the first explosion-proof fabric blanket layer (203) and the extension direction of the long sides of each set of explosion-proof webbings (5) in the second explosion-proof fabric blanket layer (205) are perpendicular to each other.

6. 6. The fire and explosion-proof structure for a high-voltage cable joint according to claim 5, wherein the extension direction of the long sides of each set of the explosion-proof webbings (5) in the first explosion-proof fabric blanket layer (203) is perpendicular to the axial direction of the high-voltage cable joint (1), and the extension direction of the long sides of each set of the explosion-proof webbings (5) in the second explosion-proof fabric blanket layer (205) is parallel to the axial direction of the high-voltage cable joint (1).

7. The fire and explosion-proof structure for a high-voltage cable joint according to claim 2, characterized in that the locking mechanism (3) includes a plurality of sets of explosion-proof fastening belts (301) installed at intervals, and locking buckles (302) are installed at the ends of the explosion-proof fastening belts (301).

8. The fireproof and explosion-proof structure for a high-voltage cable joint according to claim 7, characterized in that the explosion-proof webbing (5), the sewing thread and the explosion-proof tightening belt (301) are made of aramid, and the explosion-proof net cover (4) is made of stainless steel.

9. A step (S1) of overlapping the explosion-proof webbings (5) in a width direction in order, overlapping the rear set of explosion-proof webbings (5) with the front set of explosion-proof webbings (5) up to half the width of the upper surface thereof, and sewing the sets of explosion-proof webbings (5) together with sewing thread to obtain a first explosion-proof fabric blanket layer (203) and a second explosion-proof fabric blanket layer (205), respectively; Step (S2) of placing a first explosion-proof fabric blanket layer (203) in a vertical direction, placing a second explosion-proof fabric blanket layer (205) in a horizontal direction, and stacking the first high silica fabric layer (201), the first flame-retardant rubber sheet layer (202), the first explosion-proof fabric blanket layer (203), the second flame-retardant rubber sheet layer (204), the second explosion-proof fabric blanket layer (205) and the second high silica fabric layer (206) in this order from top to bottom, and sewing them together with sewing thread to obtain a fire and explosion-proof blanket (2); (S3) covering the high voltage cable joint (1) with the fire and explosion-proof blanket (2) with the first high silica fabric layer (201) side facing inward; a step (S4) of wrapping the locking mechanism (3) around the outside of the fire and explosion-proof blanket (2) and locking it; and (S5) covering and locking the outside of the fire / explosion-proof blanket (2) and the locking mechanism (3) with an explosion-proof net cover (4).

10. (S2) coating a first high silica fabric layer (201) onto the high voltage cable joint (1); Step (S3) of vertically placing a first explosion-proof fabric blanket layer (203) and covering a first flame-retardant rubber sheet layer (202) on the first high-silica fabric layer (201); (S4) covering a first explosion-proof fabric blanket layer (203) on a first flame-retardant rubber sheet layer (202); (S5) covering a second flame-retardant rubber sheet layer (204) on the first explosion-proof fabric blanket layer (203); (S6) placing a second explosion-proof fabric blanket layer (205) laterally and covering the second explosion-proof fabric blanket layer (205) on the second flame-retardant rubber sheet layer (204); (S7) coating a second high silica fabric layer (206) onto the second explosion-proof fabric blanket layer (205); (S8) wrapping and locking the locking mechanism (3) around the outside of the second high silica fabric layer (206); and (S9) covering and locking an explosion-proof net cover (4) on the outside of the second high silica cloth layer (206) and the locking mechanism (3).

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