Automatic fire extinguishing and explosion protection device for cable joints

Abstract

This invention discloses an automatic fire extinguishing and explosion-proof protection device for cable joints, belonging to the field of fire extinguishing protection technology. It includes two explosion-proof housings connected by screws, and further includes a protective shell, fire extinguishing stickers, and sealing rings. Each explosion-proof housing has a protective shell mounted on it via a rotating mechanism. A locking mechanism is installed on each protective shell to lock them together. Two fire extinguishing stickers are located on the inner walls of each protective shell. A sealing ring is located inside each protective shell via a pressing mechanism, at one end of each protective shell. The automatic fire extinguishing and explosion-proof protection device for cable joints provided by this invention solves the technical problem that high temperatures and flames at cable joints can completely burn the joint and adjacent cable sections, leading to damage to expensive power or communication equipment.

Description

Technical Field

[0001] This invention belongs to the field of fire protection technology, specifically relating to an automatic fire extinguishing and explosion-proof protection device for cable joints. Background Technology

[0002] Cables are composite structures used to transmit power or signals. Their core is a conductive metal core wire, wrapped with insulation material, a shielding layer, and a robust and wear-resistant outer sheath. Compared to the simpler structure of wires, cables have a more complex design and stronger protection. They can adapt to long-distance laying and complex environments (such as underground and outdoors). They are the "blood vessels" and "nerves" of modern power transmission and information communication. Safe and reliable cables are the foundation for ensuring the safety of electricity and communication.

[0003] Existing cables are limited by manufacturing and transportation length, and the length of a single cable is finite. In actual long-distance power transmission or cabling projects, multiple cables must be connected by joints to achieve the required laying distance. However, cable joints often catch fire due to poor contact and excessive resistance. The high temperature and flames at the cable joints can completely burn the joints and adjacent cable sections, resulting in damage to expensive power or communication equipment. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic fire extinguishing and explosion-proof protection device for cable joints, so as to solve the problem that the high temperature and flames at the cable joint when a fire occurs will completely burn the joint and adjacent cable sections, damaging power or communication equipment.

[0005] To achieve the above objectives, embodiments of the present invention provide an automatic fire extinguishing and explosion-proof protection device for cable joints, including an explosion-proof housing. Two explosion-proof housings are provided and connected by screws. The device also includes a protective shell, fire extinguishing stickers, and a sealing ring. Each of the two explosion-proof housings is equipped with a protective shell via a rotating mechanism. The rotating mechanism supports the protective shells for rotational opening and closing. A locking mechanism is installed on each of the two protective shells to lock them in place. Two fire extinguishing stickers are provided on the inner walls of each of the two protective shells. A sealing ring is provided inside each of the two protective shells via a pressing mechanism. The sealing ring is located at one end of each protective shell and can seal the connection between the protective shell and the cable. A sealing plate is fixedly connected to the edge of one of the protective shells, and the surface of the sealing plate contacts the inner wall of the other protective shell.

[0006] To lock the two protective shells when closed, the locking mechanism includes protrusions and a connecting assembly. Multiple protrusions are fixedly connected to both protective shells. When the two protective shells are closed, each pair of opposite protrusions contacts each other. Each pair of adjacent protrusions is provided with a connecting assembly for locking the two protrusions together. The connecting assembly includes a buckle with a groove adapted to the two protrusions, and the two contacting protrusions are located in the groove.

[0007] To press the sealing ring between the protective shell and the cable, the pressing mechanism includes a pressing ring, a pressing frame, and a driving assembly. One side of the pressing ring contacts the sealing ring, and the pressing frame is fixedly connected to the other side of the pressing ring. One of the protective shells has a sliding groove, and a sealing box is fixedly connected to the sliding groove. The inner wall of the sealing box wraps around the outer wall of the stabilizing plate. The pressing frame is slidably connected within the sliding groove. The driving assembly is located at the sliding groove and is used to drive the pressing frame to move. The driving assembly includes a stabilizing plate and a driving bolt. The stabilizing plate is fixedly connected to one side of the sliding groove, and a screw hole is formed on the stabilizing plate. The driving bolt is threaded into the screw hole, and one end of the driving bolt is rotatably connected to the pressing frame.

[0008] To support the opening and closing rotation of the protective shell, the rotation mechanism includes a fixed base and a rotating block. The fixed base is fixedly connected to one side of the explosion-proof shell, and the rotating block is fixedly connected to one side of the protective shell. The rotating block is rotatably connected inside the fixed base.

[0009] The significant technical effects of the embodiments of the present invention are as follows: 1. Through the setting of fire extinguishing patches, they will expand at high temperatures to form a heat-insulating carbon layer, which blocks the oxygen supply and prevents the flame from spreading. When combined with the protective shell, it forms a dual protection of "passive fire prevention + active fire extinguishing". 2. The explosion-proof enclosure and protective enclosure are made of electrically insulating materials. The fire extinguishing auxiliary materials do not require any power source, special smoke and heat detectors, or complex equipment and pipelines. They can extinguish the flames instantly and effectively put out the fire source in the initial stage when an accident occurs, without causing any harm to personnel. 3. The device uses a locking mechanism for installation, which is simple to install and requires no special training to operate. 4. Suitable for use in cable tunnels, cable trenches, wells, and direct burial, with a wide range of applications; avoids secondary accidents to other cables caused by intermediate cable faults. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention; Figure 2 This is a schematic diagram of the protective shell in its deployed state according to one embodiment of the present invention; Figure 3 This is a schematic diagram showing the disassembled structure of the locking mechanism in one embodiment of the present invention; Figure 4 This is a schematic diagram of the clamping mechanism in one embodiment of the present invention; Figure 5 This is a schematic diagram of the explosion-proof shell, screws, and rotating mechanism in one embodiment of the present invention; Figure 6 This is a schematic diagram of the protective shell and fire extinguishing patch in one embodiment of the present invention; Figure 7 This is one embodiment of the present invention. Figure 5 A magnified structural diagram of point A in the middle.

[0012] In the diagram: 1. Explosion-proof shell; 3. Screw; 4. Protective shell; 5. Fire extinguishing sticker; 6. Sealing ring; 7. Protrusion; 14. Pressure ring; 15. Pressure bracket; 16. Slide groove; 17. Stabilizing plate; 18. Drive bolt; 19. Sealing box; 20. Fixing base; 21. Rotating block; 22. Sealing plate; 23. Buckle; 24. Groove. Detailed Implementation

[0013] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0015] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0016] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0018] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0019] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components.

[0020] Please see Figures 1-7The illustration shows an automatic fire extinguishing and explosion-proof protection device for cable joints in one embodiment of the present invention. Its core design concept is to construct an explosion-proof protection device for cable joints with automatic fire extinguishing function.

[0021] It includes an explosion-proof enclosure 1, of which there are two, and the two explosion-proof enclosures 1 are connected by screws 3. It also includes a protective shell 4, a fire extinguishing sticker 5, and a sealing ring 6. The protective shell 4 is installed on both explosion-proof enclosures 1 through a rotating mechanism. The rotating mechanism is used to support the protective shell 4 to rotate and open on the explosion-proof enclosure 1, so as to facilitate the maintenance and repair of the cable joints inside the protective shell 4 by the operator.

[0022] The rotating mechanism includes a fixed base 20 and a rotating block 21. The fixed base 20 is fixedly connected to one side of the explosion-proof shell 1, and the rotating block 21 is fixedly connected to one side of the protective shell 4. The rotating block 21 is rotatably connected inside the fixed base 20. The two protective shells 4 are equipped with locking mechanisms that can lock the two protective shells 4. The inner walls of the two protective shells 4 are provided with two fire extinguishing stickers 5. The fire extinguishing stickers 5 expand when heated, blocking flames and high-temperature gases to prevent the internal cables from overheating and causing secondary fires.

[0023] A sealing ring 6 is installed inside each of the two protective shells 4 through a compression mechanism. The sealing ring 6 is located at one end of each of the two protective shells 4 and can seal the space between the protective shell 4 and the cable. A sealing plate 22 is fixedly connected to the edge of one of the protective shells 4. The surface of the sealing plate 22 contacts the inner wall of the other protective shell 4, which can seal the contact point between the edges of the two protective shells 4, thereby improving the sealing performance inside the two protective shells 4. In addition, the sealing ring 6 is made of high-temperature resistant silicone, which has good elasticity and sealing performance. It can be compressed between the protective shell 4 and the cable under force to fill the space between the protective shell 4 and the cable, thus playing the role of sealing the space between the protective shell 4 and the cable.

[0024] The locking mechanism can reliably lock the two protective shells 4, including protrusions 7 and connecting components. Multiple protrusions 7 are fixedly connected to both protective shells 4. When the two protective shells 4 are closed, each pair of opposite protrusions 7 contacts each other. Each pair of adjacent protrusions 7 is provided with a connecting component. The connecting component is used to lock the two protrusions 7 together. The connecting component includes a buckle 23. The buckle 23 has a groove 24 that adapts to the two protrusions 7. The two contacting protrusions 7 are located in the groove 24.

[0025] When it is necessary to lock the two protective shells 4, the buckle 23 is fastened onto the two protrusions 7. The buckle 23 limits the two protrusions 7, thereby quickly locking the two protective shells 4.

[0026] It should also be noted that the groove 24 on the buckle 23 is inclined, forming a groove similar to a dovetail groove.

[0027] The clamping mechanism includes a clamping ring 14, a clamping frame 15, and a drive assembly. One side of the clamping ring 14 contacts the sealing ring 6, and the clamping frame 15 is fixedly connected to the other side of the clamping ring 14. A sliding groove 16 is provided on one of the protective shells 4, and a sealing box 19 is fixedly connected to the sliding groove 16. The inner wall of the sealing box 19 is wrapped around the outer wall of the stabilizing plate 17. The clamping frame 15 is slidably connected in the sliding groove 16. The drive assembly is located in the sliding groove 16 and is used to drive the clamping frame 15 to move. The drive assembly includes a stabilizing plate 17 and a drive bolt 18. The stabilizing plate 17 is fixedly connected to one side of the sliding groove 16, and a screw hole is provided on the stabilizing plate 17. The drive bolt 18 is threadedly connected in the screw hole, and one end of the drive bolt 18 is rotatably connected to the clamping frame 15.

[0028] After the two protective shells 4 are closed, the sealing ring 6 is located between the protective shell 4 and the cable. Then, the operator turns the drive bolt 18 to move the clamping frame 15. When the clamping frame 15 moves, it drives the clamping ring 14 to move, so that the clamping ring 14 presses the sealing ring 6 between the protective shell 4 and the cable, thereby sealing the protective shell 4 and the cable. This achieves stepless adjustment of the sealing ring 6, ensuring adaptability to different cable outer diameters and greatly facilitating the installation, inspection and maintenance of the joint.

[0029] Working principle: When fireproofing and extinguishing treatment is required at the cable joint, the cable is passed through the device when connecting the two cable joints. Then, the two cable joints are connected, and the two explosion-proof shells 1 are connected and installed using screws 3. Then, the two adjacent protective shells 4 are closed, and the buckles 23 are fastened onto the two protrusions 7. The buckles 23 limit the two protrusions 7, thereby quickly locking the two protective shells 4. After the two protective shells 4 are closed, the sealing ring 6 is located between the protective shell 4 and the cable. Then, the operator turns the drive bolt 18 to move the clamping frame 15. When the clamping frame 15 moves, it moves the clamping ring 14, causing the clamping ring 14 to press the sealing ring 6 between the protective shell 4 and the cable, thereby sealing the protective shell 4 and the cable.

[0030] When a short circuit occurs at the cable connection and a fire breaks out, the fire extinguishing patch 5 expands at high temperatures to form a heat-insulating carbon layer, blocking the oxygen supply and preventing the flame from spreading. When combined with the protective shell 4, it forms a dual protection of "passive fire prevention + active fire extinguishing". The entire fire extinguishing and isolation process is completed automatically by physical and chemical reactions and mechanical structures without any external signal triggering or energy supply, achieving true "all-weather, fully automatic" safety protection.

[0031] To achieve a better sealing effect, a sealing plate 22 is integrally formed or fixed on the mating edge of one of the protective shells 4. When the two protective shells 4 are completely closed by the locking mechanism, the sealing plate 22 fits tightly against the plane of the inner wall of the other protective shell 4, forming a second sealing line inside the device, effectively sealing any gaps that may exist at the joint surface of the two protective shells 4.

[0032] It should also be noted that the explosion-proof shell 1 and the protective shell 4 are made of advanced SMC flame-retardant composite material, which is formed by high-temperature liquid curing in a mold, and can be reinforced with internal ribs to increase strength.

[0033] In addition, the Fire Extinguishing Patch 5, based on microcapsule encapsulation technology, can automatically release the extinguishing agent when the temperature of the fire source reaches 120℃, successfully solving the problem of automatic fire extinguishing in relatively narrow and sealed spaces, and effectively preventing multiple fire reignitions (fire extinguishing capability reaches more than 2 times). It has independent intellectual property rights and full-chain batch delivery and industrial production capabilities (microcapsule production capacity reaches tens of thousands of tons per year, and the current production capacity of Fire Extinguishing Patch 5 is 30 million pieces per year). The product complies with ISO9001, national environmental protection and EU REACH / RoHS regulations, etc. The product has obtained the inspection report of Tianjin Fire Research Institute of the Ministry of Emergency Management and has been included in the 2025 fire protection product catalog of the National Fire Administration.

[0034] Applicable ambient temperature: -40~+80℃; insulation resistance >2.5*10^12 Ω; the device responds to extinguish fire within a short time of less than 30s, and the response temperature is 120℃.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automatic fire extinguishing and explosion-proof protection device for cable joints, comprising an explosion-proof housing (1), wherein two explosion-proof housings (1) are provided, and the two explosion-proof housings (1) are connected by screws (3), characterized in that, Also includes: The protective shell (4) is provided on both explosion-proof shells (1) by means of a rotating mechanism. The rotating mechanism is used to support the protective shell (4) to rotate and open on the explosion-proof shell (1). The two protective shells (4) are equipped with a locking mechanism that can lock the two protective shells (4). Fire extinguishing stickers (5), two fire extinguishing stickers (5) are provided on the inner walls of the two protective shells (4); The sealing ring (6) is provided in the two protective shells (4) by a pressing mechanism. The sealing ring (6) is located at one end of the two protective shells (4) and can seal the protective shell (4) and the cable.

2. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 1, characterized in that, The locking mechanism includes: The two protective shells (4) are each fixedly connected with a number of protrusions (7). When the two protective shells (4) are closed, each pair of opposite protrusions (7) are in contact with each other. A connecting component is provided on each pair of adjacent protrusions (7), the connecting component being used to lock the two protrusions (7) together.

3. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 2, characterized in that, The connection component includes: The buckle (23) has a groove (24) adapted to two protrusions (7), and the two contacting protrusions (7) are located in the groove (24).

4. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 1, characterized in that, The clamping mechanism includes: A clamping ring (14), one side of which contacts the sealing ring (6); A clamping frame (15) is fixedly connected to the other side of the clamping ring (14), and a groove (16) is provided on one of the protective shells (4), and the clamping frame (15) is slidably connected in the groove (16); A drive assembly is disposed at the slide (16) for driving the clamping frame (15) to move.

5. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 4, characterized in that, The driving component includes: A stabilizing plate (17) is fixedly connected to one side of the slide groove (16); The driving bolt (18) has a screw hole on the stabilizing plate (17), and the driving bolt (18) is threaded into the screw hole. One end of the driving bolt (18) is rotatably connected to the clamping frame (15).

6. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 5, characterized in that, A sealing box (19) is fixedly connected to the groove (16), and the inner wall of the sealing box (19) is wrapped around the outer wall of the stabilizing plate (17).

7. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 1, characterized in that, The rotating mechanism includes: A fixing seat (20) is fixedly connected to one side of the explosion-proof shell (1); Rotating block (21) is fixedly connected to one side of the protective shell (4) and rotatably connected to the fixed base (20).

8. The automatic fire extinguishing and explosion-proof protection device for cable joints according to claim 1, characterized in that, One of the protective shells (4) has a sealing plate (22) fixedly connected to its edge, and the surface of the sealing plate (22) is in contact with the inner wall of the other protective shell (4).

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