A new fire and explosion-proof box for cable joint containing composite explosion-proof plate

Abstract

The utility model relates to joint explosion -proof box technical field, and disclose a novel fire -resistant explosion -proof box for cable joint containing composite explosion -proof board, including the top box, the bottom of top box is provided with the bottom box, is equipped with the first pressure -relief hole on the top box, the inside of first pressure -relief hole is provided with pressure -relief mechanism, the pressure -relief mechanism includes first ring stand and limit ring, the sliding connection of first ring stand has the guide rod, the upper end fixed connection of guide rod has the pressure -relief cover. The utility model discloses through cable joint in short -circuit fire box explosion, the explosion -proof box of cable joint because of the inside pressure instantaneous increase, its pressure -relief cover under the action of pressure, its pressure -relief cover will be upturned, make its fire -resistant explosion -proof box can realize automatic pressure -relief, after the pressure relief is completed, its pressure -relief cover under the action of first spring, the pressure -relief cover is reset and presses on the limit ring, realizes again sealing, avoids the problem that the air appears and burns in the fire -resistant explosion -proof box interior, plays the role of fire prevention.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof junction boxes, specifically a novel fireproof and explosion-proof junction box for cable joints containing a composite explosion-proof plate. Background Technology

[0002] Cables are typically made up of several or groups of conductors twisted together like ropes. Each group of conductors is insulated from each other and is often twisted around a central core. The entire cable is covered with a highly insulating outer layer. Cables are characterized by internal conductivity and external insulation. Fireproof and explosion-proof boxes are generally used at cable joints.

[0003] Existing explosion-proof boxes for cable joints are generally sealed. Even if a pressure relief port is provided, it is sealed with a cap by multiple bolts. Therefore, after a cable joint explosion, the existing explosion-proof boxes cannot release pressure quickly, causing damage to the explosion-proof box. Therefore, we propose a new type of fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate to solve the above-mentioned problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate, which addresses the shortcomings of the prior art.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is: a new type of fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate, including a top box, a bottom box provided at the bottom of the top box, a first pressure relief hole provided on the top box, and a pressure relief mechanism provided inside the first pressure relief hole;

[0006] The pressure relief mechanism includes a first ring frame and a limiting ring. A guide rod is slidably connected to the first ring frame. A pressure relief cover is fixedly connected to the upper end of the guide rod. A baffle is fixedly connected to the guide rod. A first spring is sleeved on the guide rod. The first ring frame is fixedly connected inside the first pressure relief hole. The pressure relief cover abuts against the limiting ring.

[0007] Preferably, the limiting ring is fixedly connected inside the first pressure relief hole, and the first ring frame has a first through hole. The guide rod passes through the inside of the first through hole. The limiting ring can limit the pressure relief cover.

[0008] Preferably, a second ring frame is fixedly connected inside the first pressure relief hole. The second ring frame has a second through hole, and the guide rod passes through the inside of the second through hole. The guide rod can guide the pressure relief cover.

[0009] Preferably, the upper end of the first spring abuts against the bottom of the first ring frame, the lower end of the first spring abuts against the baffle, and the bottom box is fixed to the bottom of the top box by bolts. The baffle allows the force of the first spring to act on the guide rod.

[0010] Preferably, the limiting ring has a sealing groove, and a sealing ring is inserted into the sealing groove. The sealing ring is fixedly connected to the bottom of the pressure relief cover. The sealing groove and the sealing ring can improve the sealing between the pressure relief cover and the limiting ring.

[0011] Preferably, the top box is provided with a second pressure relief hole, and the second pressure relief hole is provided with a cover, which can seal the second pressure relief hole.

[0012] Preferably, the top box is provided with a fixing mechanism, which includes a guide tube, a second spring inside the guide tube, a square rod inserted inside the guide tube, a pressure plate fixedly connected to the lower end of the square rod, and the guide tube is fixedly connected to the inner wall of the top box. The fixing mechanism can limit and fix the cable.

[0013] Preferably, a fixing post is fixedly connected inside the bottom box, and a limiting seat is fixedly connected to the fixing post. The limiting seat can limit the cable.

[0014] Preferably, the ports of the top box and the bottom box are provided with nano-gel, the inner wall of the top box is fixedly connected with an upper composite explosion-proof plate, and the inner wall of the bottom box is fixedly connected with a lower composite explosion-proof plate, wherein the surface of the composite explosion-proof plate is coated with polyurea.

[0015] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0016] 1. This new type of fireproof and explosion-proof box for cable joints containing composite explosion-proof plates allows for automatic pressure relief. In the event of a short circuit and explosion, the internal pressure of the explosion-proof box increases instantaneously. Under this pressure, the pressure relief cover is pushed upwards, allowing the box to automatically release pressure. After pressure relief, the pressure relief cover, under the action of a first spring, returns to its original position and presses against the limiting ring, achieving a re-sealing and preventing air from entering the box and causing combustion, thus providing fire protection.

[0017] 2. This new type of fireproof and explosion-proof box for cable connectors containing composite explosion-proof plates allows the top box to be aligned with the bottom box and fixed together with bolts after the connected cables are placed on the limiting seat inside the bottom box. The pressure plate inside the top box presses against the cable, and together with the limiting seat, the cable can be fixed inside the fireproof and explosion-proof box, improving the stability of the cable inside the fireproof and explosion-proof box. It is suitable for cables of different thicknesses. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the present invention.

[0020] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the top box structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the bottom box structure of this utility model.

[0023] In the diagram: 1. Top box; 2. Pressure relief mechanism; 201. First ring frame; 202. Limiting ring; 203. Second ring frame; 204. Guide rod; 205. Pressure relief cover; 206. First spring; 207. Baffle; 208. First through hole; 209. Second through hole; 210. Sealing groove; 211. Sealing ring; 3. Fixing mechanism; 301. Guide cylinder; 302. Second spring; 303. Square rod; 304. Pressure plate; 305. Fixing column; 306. Limiting seat; 4. Bottom box; 5. First pressure relief hole; 6. Second pressure relief hole; 7. Cover; 8. Upper composite explosion-proof plate; 9. Lower composite explosion-proof plate; 10. Nanogel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 this utility model and simplifying the description, and do not indicate or imply that the device or component 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 this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0028] Please see Figure 1-5 One embodiment of this utility model is: a novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate, including a top box 1, a bottom box 4 provided at the bottom of the top box 1, a first pressure relief hole 5 provided on the top box 1, and a pressure relief mechanism 2 provided inside the first pressure relief hole 5.

[0029] The pressure relief mechanism 2 includes a first ring frame 201 and a limiting ring 202. A guide rod 204 is slidably connected to the first ring frame 201. A pressure relief cover 205 is fixedly connected to the upper end of the guide rod 204. A baffle 207 is fixedly connected to the guide rod 204. A first spring 206 is sleeved on the guide rod 204. The first ring frame 201 is fixedly connected inside the first pressure relief hole 5. The pressure relief cover 205 abuts against the limiting ring 202. After the explosion of the fireproof box caused by the short circuit through the cable joint, the internal pressure of the explosion-proof box increases instantaneously. Under the action of the pressure, the pressure relief cover 205 is pushed upward, enabling the fireproof and explosion-proof box to automatically relieve pressure. After the pressure relief is completed, the pressure relief cover 205 returns to its original position and presses against the limiting ring 202 under the action of the first spring 206, achieving resealing and preventing air from entering the fireproof and explosion-proof box and causing combustion, thus playing a fireproof role.

[0030] The limiting ring 202 is fixedly connected inside the first pressure relief hole 5. The first ring frame 201 has a first through hole 208. The guide rod 204 passes through the inside of the first through hole 208. The limiting ring 202 can limit the pressure relief cover 205.

[0031] The first pressure relief hole 5 is fixedly connected to a second ring frame 203. The second ring frame 203 has a second through hole 209. The guide rod 204 passes through the interior of the second through hole 209. The guide rod 204 can guide the pressure relief cover 205.

[0032] The upper end of the first spring 206 abuts against the bottom of the first ring frame 201, and the lower end of the first spring 206 abuts against the baffle 207. The bottom box 4 is fixed to the bottom of the top box 1 by bolts. The baffle 207 allows the force of the first spring 206 to act on the guide rod 204.

[0033] The limiting ring 202 has a sealing groove 210, and a sealing ring 211 is inserted into the sealing groove 210. The sealing ring 211 is fixedly connected to the bottom of the pressure relief cover 205. The sealing groove 210 and the sealing ring 211 can improve the sealing between the pressure relief cover 205 and the limiting ring 202.

[0034] The top box 1 has a second pressure relief hole 6, and a cover 7 is provided on the second pressure relief hole 6. The cover 7 can seal the second pressure relief hole 6.

[0035] Nanogel 10 is provided at the ports of the top box 1 and the bottom box 4. An upper composite explosion-proof plate 8 is fixedly connected to the inner wall of the top box 1, and a lower composite explosion-proof plate 9 is fixedly connected to the inner wall of the bottom box 4. The surface of the composite explosion-proof plate is coated with polyurea.

[0036] Working principle: After an explosion occurs in the fireproof box due to a short circuit, the internal pressure of the explosion-proof box increases instantaneously. Under the pressure, the pressure relief cover 205 is pushed upward, allowing the fireproof and explosion-proof box to automatically release pressure. After the pressure is released, the pressure relief cover 205 returns to its original position under the action of the first spring 206, pressing against the limit ring 202 to achieve a second seal. This prevents air from entering the fireproof and explosion-proof box and causing combustion, thus playing a fireproof role.

[0037] Please see Figure 1-5 Based on the above embodiments, in another embodiment of the present invention, a fixing mechanism 3 is provided on the top box 1. The fixing mechanism 3 includes a guide tube 301, a second spring 302 is provided inside the guide tube 301, a square rod 303 is inserted into the guide tube 301, and a pressure plate 304 is fixedly connected to the lower end of the square rod 303. The guide tube 301 is fixedly connected to the inner wall of the top box 1. The fixing mechanism 3 can limit and fix the cable.

[0038] The bottom box 4 has a fixed post 305 inside, and a limit seat 306 is fixedly connected to the fixed post 305. The limit seat 306 can limit the cable.

[0039] Working principle: After the cable is placed on the limiting seat 306 inside the bottom box 4, the top box 1 is aligned with the bottom box 4 and the top box 1 is fixed to the bottom box 4 with bolts. The pressure plate 304 inside the top box 1 will press against the cable. With the help of the limiting seat 306, the cable can be fixed inside the fireproof and explosion-proof box, which improves the stability of the cable inside the fireproof and explosion-proof box. It is suitable for cables of different thicknesses.

[0040] It should be noted that the nanogel 10 in the above embodiments is filled and sealed at both ends of the explosion-proof box by an injection device after the cable is installed, and the composite explosion-proof plate is a nanocomposite explosion-proof plate.

[0041] Nanocomposite explosion-proof panels have the following advantages:

[0042] (1) Low thermal conductivity: The thermal conductivity is less than 0.02w / mk at room temperature of 25℃, only 0.035w / mk at high temperature of 300℃, and only 0.045w / mk at high temperature of 600℃.

[0043] (2) A1 grade flame retardant: The nano-composite explosion-proof board is a non-combustible material, which is explosion-proof, shock-absorbing, safe and reliable.

[0044] (3) Its density is only 1 / 40 that of steel.

[0045] (4) Its explosion-proof, shock-absorbing and energy-absorbing effects are 3 to 5 times that of aluminum foam.

[0046] (5) The deformation reduction rate of 10 kg TNT protective armor is 14%.

[0047] (6) The internal acceleration attenuation rate of the structure at the moment of the explosion impact was 78.80%.

[0048] (7) The DM51 grenade exploded upon contact, without penetration, and the deformation was 2.5cm.

[0049] Key characteristics of polyurea:

[0050] Corrosion resistant, waterproof, and wear resistant.

[0051] (1) It cures quickly and can be sprayed on any curved, inclined and vertical surface without dripping. It gels in 5 seconds and reaches walking strength in 1 minute.

[0052] (2) It is not sensitive to humidity and temperature, and is not affected by ambient temperature and humidity during construction.

[0053] (3) Excellent physical and chemical properties, extremely high tensile and impact strength, flexibility, wear resistance, slip resistance, aging resistance and corrosion resistance.

[0054] (4) The coating is continuous, dense, seamless, and free of pinholes, making it beautiful, practical, and durable.

[0055] (5) It has good adhesion and can be sprayed onto any substrate such as steel, wood, and concrete.

[0056] This utility model provides a novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate. There are many methods and approaches to implement this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate, comprising a top box (1), characterized in that: The top box (1) is provided with a bottom box (4) at the bottom, and a first pressure relief hole (5) is provided on the top box (1). A pressure relief mechanism (2) is provided inside the first pressure relief hole (5). The pressure relief mechanism (2) includes a first ring frame (201) and a limiting ring (202). A guide rod (204) is slidably connected to the first ring frame (201). A pressure relief cover (205) is fixedly connected to the upper end of the guide rod (204). A baffle (207) is fixedly connected to the guide rod (204). A first spring (206) is sleeved on the guide rod (204). The first ring frame (201) is fixedly connected inside the first pressure relief hole (5). The pressure relief cover (205) abuts against the limiting ring (202).

2. The novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The limiting ring (202) is fixedly connected inside the first pressure relief hole (5), and the first ring frame (201) has a first through hole (208), and the guide rod (204) passes through the inside of the first through hole (208).

3. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The first pressure relief hole (5) is fixedly connected to a second ring frame (203), and a second through hole (209) is provided on the second ring frame (203). The guide rod (204) passes through the interior of the second through hole (209).

4. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The upper end of the first spring (206) abuts against the bottom of the first ring frame (201), and the lower end of the first spring (206) abuts against the baffle (207). The bottom box (4) is fixed to the bottom of the top box (1) by bolts.

5. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The limiting ring (202) has a sealing groove (210), and a sealing ring (211) is inserted into the sealing groove (210). The sealing ring (211) is fixedly connected to the bottom of the pressure relief cover (205).

6. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The top box (1) is provided with a second pressure relief hole (6), and a cover (7) is provided on the second pressure relief hole (6).

7. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The top box (1) is provided with a fixing mechanism (3), which includes a guide tube (301). A second spring (302) is provided inside the guide tube (301). A square rod (303) is inserted into the guide tube (301). A pressure plate (304) is fixedly connected to the lower end of the square rod (303). The guide tube (301) is fixedly connected to the inner wall of the top box (1).

8. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The bottom box (4) is fixedly connected to a fixing post (305), and a limiting seat (306) is fixedly connected to the fixing post (305).

9. A novel fireproof and explosion-proof box for cable joints containing a composite explosion-proof plate according to claim 1, characterized in that: The top box (1) and the bottom box (4) are provided with nano gel (10), the inner wall of the top box (1) is fixedly connected with an upper composite explosion-proof plate (8), and the inner wall of the bottom box (4) is fixedly connected with a lower composite explosion-proof plate (9).

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