Fireproof and explosion-proof structure for high-voltage cable joints and manufacturing method thereof.

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 specifically, to a fire and explosion prevention structure for high-voltage cable joints and a manufacturing method thereof.

Background Art

[0002] Since the power transmission network requires more power supply links and longer transmission lines, the intermediate joints of power cables have become indispensable in urban power transmission networks. The intermediate joints of cables are the weakest links in the power cable lines of the power transmission network. After installation, it is necessary to regularly inspect during operation. Due to the quality and installation defects of the intermediate joints, or the effects of moisture, overload, and other external forces, explosion accidents of the intermediate joints of cables frequently occur. The high temperature generated by the explosion and the energy instantaneously released are sufficient to blast or burn other cables running parallel in the cable trench, and further flip the manhole cover and damage the trench, which may cause injuries to pedestrians.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art, provide a fire and explosion prevention structure for high-voltage cable joints with good fire and explosion prevention performance, effectively extend the operating life of high-voltage cable joints, and have high safety in use, and a manufacturing method thereof.

Means for Solving the Problems

[0004] To solve the above technical problems, the present invention adopts the following technical solutions.

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

[0006] As a further improvement to the above technical solution, Both the first explosion-proof woven blanket layer and the second explosion-proof woven blanket layer are blanket-like structures formed by partially overlapping multiple sets of explosion-proof webbing along the width direction and sewing them together with sewing thread.

[0007] The blanket-like structure is configured such that the rear set of explosion-proof webbing partially overlaps the upper surface of the front set of explosion-proof webbing.

[0008] The explosion-proof webbing of the rear set is partially overlapped with the explosion-proof webbing of the front set up to half the width of the upper surface.

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

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

[0011] The locking mechanism includes multiple sets of explosion-proof tightening belts installed at intervals, with locking buckles installed at the ends of the explosion-proof tightening belts.

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

[0013] This invention discloses a method for manufacturing a fireproof and explosion-proof structure for high-voltage cable joints. Step (S1) involves overlapping the explosion-proof webbing pieces in sequence along the width direction, overlapping the rear set of explosion-proof webbing pieces up to half the width of the upper surface of the front set of explosion-proof webbing pieces, and sewing each set of explosion-proof webbing pieces together with sewing thread to obtain a first explosion-proof woven blanket layer and a second explosion-proof woven blanket layer, respectively. Step (S2) involves installing a first explosion-proof woven blanket layer vertically, installing a second explosion-proof woven blanket layer horizontally, and then layering the first high-silica cloth layer, the first flame-retardant rubber sheet layer, the first explosion-proof woven blanket layer, the second flame-retardant rubber sheet layer, the second explosion-proof woven blanket layer, and the second high-silica cloth layer from top to bottom, and sewing them together integrally with sewing thread to obtain a fire-resistant and explosion-proof blanket. Step (S3) involves covering the high-voltage cable joint with a fire-resistant / explosion-proof blanket, with the first high-silica fabric layer facing inward. Step (S4) involves wrapping the locking mechanism around the outside of the fireproof / explosionproof blanket and locking it in place. The process includes step (S5) of covering the outside of the fireproof / explosionproof blanket and locking mechanism with an explosion-proof net cover and locking it in place.

[0014] The present invention further discloses another method for manufacturing a fireproof and explosion-proof structure for high-voltage cable joints. Step (S1) involves overlapping the explosion-proof webbing pieces in sequence along the width direction, overlapping the rear set of explosion-proof webbing pieces up to half the width of the upper surface of the front set of explosion-proof webbing pieces, and sewing each set of explosion-proof webbing pieces together with sewing thread to obtain a first explosion-proof woven blanket layer and a second explosion-proof woven blanket layer, respectively. Step (S2) involves covering the high-voltage cable joint with a first high-silica fabric layer, Step (S3) involves covering the first flame-retardant rubber sheet layer with the first high-silica cloth layer, Step (S4) involves installing the first explosion-proof woven blanket layer vertically and covering the first explosion-proof woven blanket layer with the first flame-retardant rubber sheet layer, Step (S5) involves covering the first explosion-proof woven blanket layer with a second flame-retardant rubber sheet layer, Step (S6) involves installing a second explosion-proof woven blanket layer horizontally and covering the second explosion-proof woven blanket layer with the second flame-retardant rubber sheet layer, Step (S7) involves covering the second high-silica fabric layer with the second explosion-proof woven blanket layer, Step (S8) involves wrapping the locking mechanism around the outside of the second high-silica fabric layer and locking it in place. The process includes the step (S9) of covering the outside of the second high-silica fabric layer and the locking mechanism with an explosion-proof net cover and locking it in place. [Effects of the Invention]

[0015] The advantages of the present invention compared to the prior art are as follows:

[0016] The fireproof and explosion-proof structure for high-voltage cable joints provided by the present invention is used to cover the high-voltage cable joint and includes a first high-silica cloth layer, a first flame-retardant rubber sheet layer, a first explosion-proof woven blanket layer, a second flame-retardant rubber sheet layer, a second explosion-proof woven blanket layer, a second high-silica cloth layer, a locking mechanism, and an explosion-proof net cover, all installed in order from the inside out. The multi-layered fireproof and explosion-proof blanket 2 not only enhances the sealing performance of the high-voltage cable joint but also significantly increases the overall structural strength. Working in cooperation with the locking mechanism 3, it can provide support to the fireproof and explosion-proof blanket from the outside, effectively preventing explosions or combustion from the inside out, resulting in good fireproof and explosion-proof performance and effectively extending the operating life of the high-voltage cable joint. Furthermore, the explosion-proof net cover is placed on the outside of the fireproof and explosion-proof blanket and locking mechanism. Even if the fireproof and explosion-proof blanket and locking mechanism malfunction and rupture, the explosion-proof net cover can prevent the scattering of fragments, ensuring high safety in use.

[0017] The first method for manufacturing the fireproof and explosion-proof structure of a high-voltage cable joint provided by the present invention involves first partially overlapping and sewing together multiple sets of explosion-proof webbing to produce a first explosion-proof woven blanket layer and a second explosion-proof woven blanket layer. Next, 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 are laminated and sewn together from top to bottom to produce a fireproof and explosion-proof blanket. The fireproof and explosion-proof blanket is then covered over the high-voltage cable joint and secured with a locking mechanism. An explosion-proof net cover is installed on the outside of the fireproof and explosion-proof blanket and the locking mechanism. By pre-manufacturing the multi-layer structure as the entire fireproof and explosion-proof blanket (i.e., a preform), the size of the fireproof and explosion-proof blanket can be flexibly cut according to the different specifications of the high-voltage cable joint to which it is applied, making it convenient and quick to use, highly reliable, reducing the difficulty of temporary assembly, and effectively improving construction efficiency.

[0018] The second manufacturing method of the fire and explosion proof structure of the high voltage cable joint provided by the present invention is as follows: First, a plurality of sets of explosion proof webbings are partially overlapped and sewn to obtain a first explosion proof fabric blanket layer and a second explosion proof fabric blanket layer. In this embodiment, a flame retardant rubber sheet is adopted as a semi-cylindrical coil material. Next, in sequence, a high silica cloth is coated on the high voltage cable joint, 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, the upper and lower two flame retardant rubber sheet coil materials are connected and coated on the first explosion proof fabric blanket layer, the second explosion proof fabric blanket layer is coated on the second flame retardant rubber sheet layer, a high silica cloth is coated on the second explosion proof fabric blanket layer, a locking mechanism is fixed and connected to the second high silica cloth layer, an explosion proof net cover is installed outside the second high silica cloth layer and the locking mechanism, and a multi-layer structure is coated and assembled in sequence. The structures of each layer are relatively independent. When 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, effectively reducing the maintenance cost.

Brief Description of the Drawings

[0019] [Figure 1] It is an assembly schematic diagram of the fire and explosion proof structure of the high voltage cable joint. [Figure 2] It is a structural schematic diagram of the exploded state of the first embodiment of the fire and explosion proof structure of the high voltage cable joint. [Figure 3] It is a structural schematic diagram of the fire and explosion proof blanket of the first embodiment. [Figure 4] It is an enlarged view of the detail A in FIG. 3. [Figure 5] It is a schematic diagram of the partial overlap of the explosion proof webbing. [Figure 6] It is a structural schematic diagram of the exploded state of the second embodiment of the fire and explosion proof structure of the high voltage cable joint.

Modes for Carrying Out the Invention

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

[0021] Example 1 As shown in Figures 1 to 4, the fireproof and explosion-proof structure of the high-voltage cable joint in this embodiment includes a fireproof and explosion-proof blanket 2 for covering the high-voltage cable joint 1, a locking mechanism 3 for fixing the fireproof and explosion-proof blanket 2 to the high-voltage cable joint 1, and an explosion-proof net cover 4 for covering the fireproof and explosion-proof blanket 2 and the locking mechanism 3. The fireproof and explosion-proof blanket 2 includes 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, which are installed in order from the inside out. The fireproof and explosion-proof structure of the high-voltage cable joint is used to cover the high-voltage cable joint 1 and includes 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, a second high-silica cloth layer 206, a locking mechanism 3, and an explosion-proof net cover 4, all installed in order from the inside out. The multi-layered fireproof and explosion-proof blanket 2 not only enhances the sealing of the high-voltage cable joint 1 but also provides overall protection. The structure also has great structural strength and, in cooperation with the locking mechanism 3, can provide support to the fire-proof / explosion-proof blanket 2 from the outside, effectively preventing explosions or combustion from the inside to the outside, resulting in good fire-proof / explosion-proof performance and effectively extending the operating life of the high-voltage cable joint 1. Furthermore, the explosion-proof net cover 4 covers the outside of the fire-proof / explosion-proof blanket 2 and the locking mechanism 3, so even if the fire-proof / explosion-proof blanket 2 and the locking mechanism 3 malfunction and rupture, the explosion-proof net cover 4 can prevent the scattering of fragments, resulting in high safety in use.

[0022] As shown in Figure 5, preferably, the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205 are both blanket-like structures in which multiple sets of explosion-proof webbing 5 are partially overlapped along the width direction and sewn together with sewing thread. In this embodiment, the structures of the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205 are the same, and both are installed in a blanket-like structure in which multiple sets of explosion-proof webbing 5 are sequentially partially overlapped along the width direction and sewn together with sewing thread. Due to the above structure, it can deform in the event of an explosion occurring inside or outside, making it difficult to rupture, preventing the propagation of heat and shock, and exhibiting an excellent explosion-proof effect.

[0023] Preferably, the blanket-like structure is configured such that the rear set of explosion-proof webbing 5 partially overlaps the upper surface of the front set of explosion-proof webbing 5. In this embodiment, the blanket-like structure adopts a configuration in which the rear set of explosion-proof webbing 5 partially overlaps the upper surface of the front set of explosion-proof webbing 5, with the aim of facilitating the manufacture of the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205 and improving manufacturing efficiency. In other embodiments, the blanket-like structure can also be configured such that the second set of explosion-proof webbing 5 partially overlaps the upper surface of the first set of explosion-proof webbing 5, and the third set of explosion-proof webbing 5 partially overlaps the lower surface of the second set of explosion-proof webbing 5. Furthermore, the two second sets of explosion-proof webbing 5 partially overlap the upper and lower surfaces of the first set of explosion-proof webbing 5, respectively, and the third set of explosion-proof webbing 5 partially overlaps the two second sets of explosion-proof webbing 5. Therefore, the embodiment is not limited to this particular example.

[0024] Preferably, the rear set of explosion-proof webbing 5 is partially overlapped to a position half the width of the upper surface of the front set of explosion-proof webbing 5. In this embodiment, the explosion-proof webbing 5 is specified to have a width of 100 mm, the rear set of explosion-proof webbing 5 is partially overlapped to a position half the width of the front set of explosion-proof webbing 5, and then each set of explosion-proof webbing 5 is sewn together with sewing thread, thereby further strengthening the structural strength of the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205 and improving the explosion-proof effect.

[0025] Preferably, the direction of extension of the long sides of each set of explosion-proof webbing 5 in the first explosion-proof woven blanket layer 203 and the direction of extension of the long sides of each set of explosion-proof webbing 5 in the second explosion-proof woven blanket layer 205 are perpendicular to each other. In this embodiment, the arrangement direction of each set of explosion-proof webbing 5 constituting the first explosion-proof woven blanket layer 203 and the arrangement direction of each set of explosion-proof webbing 5 constituting the second explosion-proof woven blanket layer 205 are perpendicular to each other. That is, the first explosion-proof woven blanket layer 203 is arranged in the warp direction (vertical direction), and the second explosion-proof woven blanket layer 205 is arranged in the weft direction (horizontal direction). As a result, the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205 in the fire-proof / explosion-proof blanket 2 are arranged in the warp and weft directions, and the explosion-proof webbing 5 overlap vertically and horizontally. This effectively increases tension, strengthens the structural strength of the fire-proof / explosion-proof blanket 2, and provides a high explosion-proof and fire-resistant effect.

[0026] Preferably, the direction in which the long sides of each set of explosion-proof webbing 5 in the first explosion-proof woven blanket layer 203 extend is perpendicular to the axial direction of the high-voltage cable joint 1, and the direction in which the long sides of each set of explosion-proof webbing 5 in the second explosion-proof woven blanket layer 205 extend is parallel to the axial direction of the high-voltage cable joint 1. In this embodiment, the direction perpendicular to the axis of the high-voltage cable joint 1 is defined as the longitudinal direction, and the direction parallel to the axis of the high-voltage cable joint 1 is defined as the transverse direction (the same applies hereinafter). In the fire-proof / explosion-proof blanket 2, the first explosion-proof woven blanket layer 203 is installed in the longitudinal direction, that is, the direction of extension of the long side of each set of explosion-proof webbing 5 in the first explosion-proof woven blanket layer 203 is perpendicular to the axial direction of the high-voltage cable joint 1, and the second explosion-proof woven blanket layer 205 is installed in the transverse direction, that is, the direction of extension of the long side of each set of explosion-proof webbing 5 in the second explosion-proof woven 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 woven blanket layer 203 can distribute the impact force to each set of explosion-proof webbing 5, providing an effective buffering effect and high tear resistance.

[0027] Preferably, the locking mechanism 3 includes multiple sets of explosion-proof tightening belts 301 installed at intervals, with lock buckles 302 installed at the ends of the explosion-proof tightening belts 301. In this embodiment, the locking mechanism 3 adopts the form of explosion-proof tightening belts 301, with a lock buckle 302 provided at one end of each belt. When installing, the explosion-proof tightening belt 301 is wrapped around the outside of the fire-proof / explosion-proof blanket 2 along the longitudinal direction, and the free end of the explosion-proof tightening belt 301 is connected to the lock buckle 302, thereby tightening the fire-proof / explosion-proof blanket 2 to the high-voltage cable joint 1. This has the advantages of a simple structure, easy and quick installation and removal process, and low cost.

[0028] Preferably, the explosion-proof webbing 5, sewing thread, and explosion-proof tightening belt 301 are made of aramid, and the explosion-proof net cover 4 is made of stainless steel. In this embodiment, the full name of aramid fiber is "aromatic polyamide fiber," a new type of high-tech synthetic fiber that has excellent properties such as ultra-high strength, high modulus of elasticity, high temperature resistance, acid resistance, alkali resistance, and light weight. The explosion-proof webbing 5, sewing thread, and explosion-proof tightening belt 301 are made of aramid and have good fire resistance, while 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 in this embodiment is as follows: Step (S1) involves overlapping the explosion-proof webbing 5 in sequence along the width direction, overlapping the rear set of explosion-proof webbing 5 to half the width of the upper surface of the front set of explosion-proof webbing 5, and sewing each set of explosion-proof webbing 5 together with sewing thread to obtain the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205, respectively. Step (S2) involves installing a first explosion-proof woven blanket layer 203 vertically and a second explosion-proof woven blanket layer 205 horizontally, then layering the first high-silica cloth layer 201, the first flame-retardant rubber sheet layer 202, the first explosion-proof woven blanket layer 203, the second flame-retardant rubber sheet layer 204, the second explosion-proof woven blanket layer 205, and the second high-silica cloth layer 206 from top to bottom, and sewing them together integrally with sewing thread to obtain a fire-proof / explosion-proof blanket 2. The first high-silica fabric layer 201 side is facing inward, and the fire-proof / explosion-proof blanket 2 is covered over the high-voltage cable joint 1 (S3), Step (S4) involves wrapping the locking mechanism 3 around the outside of the fireproof / explosionproof blanket 2 and locking it in place. The procedure includes the step (S5) of covering the outside of the fire-proof / explosion-proof blanket 2 and the locking mechanism 3 with the explosion-proof net cover 4 and locking it in place.

[0030] The manufacturing method for the fireproof and explosion-proof structure of the high-voltage cable joint is as follows: First, multiple sets of explosion-proof webbing 5 are partially overlapped and sewn together to produce a first explosion-proof woven blanket layer 203 and a second explosion-proof woven blanket layer 205. Next, 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 from top to bottom to produce a fireproof and explosion-proof blanket 2. The fireproof and explosion-proof blanket 2 is then used to manufacture the fireproof and explosion-proof blanket 2 for high-voltage cables. By covering the cable joint 1 and securing it with the locking mechanism 3, and installing the explosion-proof net cover 4 on the outside of the fire-proof / explosion-proof blanket 2 and the locking mechanism 3, and by pre-manufacturing the multi-layer structure as the entire fire-proof / explosion-proof blanket 2 (i.e., preform), the size of the fire-proof / explosion-proof blanket 2 can be flexibly cut according to the different specifications of the high-voltage cable joint 1 to be applied, making it convenient and quick to use, highly reliable, reducing the difficulty of temporary assembly, and effectively improving construction efficiency.

[0031] Example 2 As shown in Figure 6, the method for manufacturing the fireproof and explosion-proof structure of the high-voltage cable joint in this embodiment is as follows: Step (S1) involves overlapping the explosion-proof webbing 5 in sequence along the width direction, overlapping the rear set of explosion-proof webbing 5 to half the width of the upper surface of the front set of explosion-proof webbing 5, and sewing each set of explosion-proof webbing 5 together with sewing thread to obtain the first explosion-proof woven blanket layer 203 and the second explosion-proof woven blanket layer 205, respectively. Step (S2) involves covering the high-voltage cable joint 1 with a first high-silica fabric layer 201, Step (S3) involves covering the first flame-retardant rubber sheet layer 202 with the first high-silica cloth layer 201, Step (S4) involves installing the first explosion-proof woven blanket layer 203 in the vertical direction and covering the first explosion-proof woven blanket layer 203 with the first flame-retardant rubber sheet layer 202, Step (S5) involves covering the first explosion-proof woven blanket layer 203 with a second flame-retardant rubber sheet layer 204, Step (S6) involves installing the second explosion-proof woven blanket layer 205 in the vertical direction and covering the second explosion-proof woven blanket layer 205 with the second flame-retardant rubber sheet layer 204, Step (S7) involves covering the second high-silica fabric layer 206 with the second explosion-proof woven fabric blanket layer 205, Step (S8) involves wrapping the locking mechanism 3 around the outside of the second high-silica fabric layer 206 and locking it, The process includes the step (S9) of covering the outside of the second high-silica fabric layer 206 and the locking mechanism 3 with the explosion-proof net cover 4 and locking it in place.

[0032] The manufacturing method for the fireproof and explosion-proof structure of the high-voltage cable joint in Example 2 involves first partially overlapping and sewing together multiple sets of explosion-proof webbing 5 to produce 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. Subsequently, a high-silica cloth is sequentially covered over 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 and covered over 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 then covered over the first flame-retardant rubber sheet layer 202, and the two upper and lower flame-retardant rubber sheet coil materials are connected to form the first explosion-proof By covering the explosion-proof woven blanket layer 203 with a second flame-retardant rubber sheet layer 204, covering the second explosion-proof woven blanket layer 205 with a second flame-retardant rubber sheet layer 204, covering the second explosion-proof woven blanket layer 205 with a high-silica cloth to obtain a second high-silica cloth layer 206, fixing and connecting the locking mechanism 3 to the second high-silica cloth layer 206, and installing the explosion-proof net cover 4 on the outside of the second high-silica cloth layer 206 and the locking mechanism 3, the multi-layer structure is assembled by sequentially covering each layer. As a result, the structure of each layer is relatively independent, and if the structure of one of the layers is damaged, it is not necessary to replace the entire fire-proof / explosion-proof blanket 2, but only the structure of that layer can be replaced, effectively reducing maintenance costs.

[0033] The fireproof and explosion-proof structure of the high-voltage cable joint manufactured by the manufacturing method of the fireproof and explosion-proof structure of the high-voltage cable joint provided in this embodiment is identical to that of Embodiment 1, with the differences being as follows: Embodiment 1 pre-manufactures the multilayer structure as a whole, simplifying the installation steps and improving construction efficiency, whereas Embodiment 2 assembles the multilayer structure by sequentially covering each layer, with each layer being relatively independent. If the structure of any of these layers is damaged or fails, it is not necessary to remove and replace the entire structure, and the structure of that layer can be precisely replaced, 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 embodiments. Improvements and modifications that can be obtained without departing from the technical spirit of the present invention should also be considered within the scope of protection of the present invention for those skilled in the art. [Explanation of Symbols]

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

Claims

1. A fireproof and explosion-proof structure for a high-voltage cable joint, comprising: a fireproof and explosion-proof blanket (2) for covering a high-voltage cable joint (1); a locking mechanism (3) for fixing the fireproof and explosion-proof blanket (2) to the high-voltage cable joint (1); and an explosion-proof net cover (4) for covering the fireproof and explosion-proof blanket (2) and the locking mechanism (3), wherein the fireproof and explosion-proof blanket (2) comprises 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) installed in order from the inside out.

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

3. The fire- and explosion-proof structure for a high-voltage cable joint according to claim 2, characterized in that the blanket-like structure is configured such that the rear set of explosion-proof webbing (5) partially overlaps the upper surface of the front set of explosion-proof webbing (5).

4. The fire- and explosion-proof structure for a high-voltage cable joint according to claim 3, characterized in that the explosion-proof webbing (5) of the rear set partially overlaps the explosion-proof webbing (5) of the front set up to half the width of the upper surface.

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

6. The fire- and explosion-proof structure for a high-voltage cable joint according to claim 5, characterized in that the direction of extension of the long side of each set of explosion-proof webbing (5) in the first explosion-proof woven blanket layer (203) is perpendicular to the axial direction of the high-voltage cable joint (1), and the direction of extension of the long side of each set of explosion-proof webbing (5) in the second explosion-proof woven 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 tightening belts (301) installed at intervals, and lock buckles (302) are installed at the ends of the explosion-proof tightening belts (301).

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

9. Step (S1) involves overlapping the explosion-proof webbing (5) in sequence along the width direction, overlapping the rear set of explosion-proof webbing (5) to half the width of the upper surface of the front set of explosion-proof webbing (5), and sewing each set of explosion-proof webbing (5) together with sewing thread to obtain a first explosion-proof woven blanket layer (203) and a second explosion-proof woven blanket layer (205), respectively. Step (S2) involves installing a first explosion-proof woven blanket layer (203) vertically and a second explosion-proof woven blanket layer (205) horizontally, and then stacking the first high-silica cloth layer (201), the first flame-retardant rubber sheet layer (202), the first explosion-proof woven blanket layer (203), the second flame-retardant rubber sheet layer (204), the second explosion-proof woven blanket layer (205), and the second high-silica cloth layer (206) from top to bottom, and sewing them together integrally with sewing thread to obtain a fire-proof and explosion-proof blanket (2). Step (S3) involves covering the high-voltage cable joint (1) with the fire-proof / explosion-proof blanket (2) with the first high-silica fabric layer (201) facing inward, Step (S4) involves wrapping the locking mechanism (3) around the outside of the fire-proof / explosion-proof blanket (2) and locking it in place. A method for manufacturing a fireproof and explosionproof structure for a high-voltage cable joint according to any one of claims 1 to 8, characterized by comprising the step (S5) of covering the outside of the fireproof and explosionproof blanket (2) and the locking mechanism (3) with an explosionproof net cover (4) and locking it.

10. Step (S1) of overlapping the explosion-proof webbing (5) in order along the width direction, overlapping the rear set of explosion-proof webbing (5) to half the width of the upper surface of the front set of explosion-proof webbing (5), and sewing each set of explosion-proof webbing (5) together with sewing thread to obtain a first explosion-proof woven blanket layer (203) and a second explosion-proof woven blanket layer (205), respectively. Step (S2) involves covering the high-voltage cable joint (1) with a first high-silica fabric layer (201), Step (S3) involves installing a first explosion-proof woven blanket layer (203) in the longitudinal direction and covering the first flame-retardant rubber sheet layer (202) with the first high-silica cloth layer (201), Step (S4) of covering the first explosion-proof woven blanket layer (203) with the first flame-retardant rubber sheet layer (202), Step (S5) of covering the first explosion-proof woven blanket layer (203) with a second flame-retardant rubber sheet layer (204), Step (S6) involves installing a second explosion-proof woven blanket layer (205) horizontally and covering the second explosion-proof woven blanket layer (205) with the second flame-retardant rubber sheet layer (204), Step (S7) of covering the second high-silica fabric layer (206) with the second explosion-proof woven fabric blanket layer (205), Step (S8) involves wrapping the locking mechanism (3) around the outside of the second high-silica fabric layer (206) and locking it, A method for manufacturing a fireproof and explosionproof structure for a high-voltage cable joint according to any one of claims 1 to 8, comprising the step (S9) of covering the outside of the second high-silica fabric layer (206) and the locking mechanism (3) with an explosion-proof net cover (4) and locking it.

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