Marine high-temperature-resistant flame-retardant material and B-15-grade fireproof bulkhead box

Abstract

The invention belongs to the technical field of marine flame-retardant equipment, and relates to a marine high-temperature-resistant flame-retardant material and a B-15-level fireproof bulkhead box. The B15 fireproof bulkhead box comprises a box outer shell, a box inner shell, a supporting base, aluminum strip pieces, preformed holes and the like. A reserved hole is formed in the box outer shell, the box outer shell is nested outside the box inner shell, a supporting base is arranged on the lower portion of the box inner shell, and the box body is fixed in a wall through a fastening screw, an outer fixing groove, a metal clamping plate and a buckle fastening plate combined structure. The B15 fireproof bulkhead box is prepared from a marine high-temperature-resistant flame-retardant material, and the marine high-temperature-resistant flame-retardant material comprises the following raw materials: polypropylene, a hydrophobic enteromorpha fiber stock solution modified flame retardant, graphite, calcium carbonate and the like. The B15 fireproof bulkhead box made of the marine high-temperature-resistant flame-retardant material is light in weight, high in strength, resistant to corrosion and excellent in fireproof and flame-retardant performance, reaches the B15 fireproof grade of ships, can be applied to factory harbor areas such as mines, metallurgy, power plants, chemical engineering, manufacturing, port operation and temporary houses in construction sites, and is wide in application scene.

Description

Technical field:

[0001] The invention belongs to the technical field of marine flame retardant equipment, and relates to a marine equipment injection molding material with excellent high temperature resistance and flame retardant performance. The marine equipment manufactured using the material has high temperature resistance and flame retardant effects, and reaches the B15 ship fire protection grade, in particular to a marine high temperature resistant flame retardant material and a B-15 fireproof bulkhead box. Background technology:

[0002] The ship structure should meet the requirements of stability, strength, rigidity, vibration and noise reduction. Marine plastic components should be made of corrosion-resistant, wear-resistant and high-temperature-resistant plastic materials, such as polyethylene and polypropylene. At the same time, the material of the component should have sufficient strength and rigidity to withstand the impact of the ship's shaking and vibration, ensuring that the component will not be deformed or damaged.

[0003] For plastics in the fireproof area of ​​ships, fireproof insulation materials need to be used. According to the "General Specifications for Ships" and "Ship Fire Protection Requirements", the fire-resistant division levels on ships are divided into three levels: A, B, and C. The structural fire protection design needs to meet the fire resistance level requirements of the specifications for ship fireproof areas and cabin fire boundaries. Thermal conductivity is the main indicator for measuring the quality of material fire resistance and is an important physical parameter of refractory materials. The smaller the thermal conductivity, the better the fire resistance.

[0004] Ship fireproof insulation materials are divided into two categories according to material characteristics: inorganic materials and organic materials. Inorganic materials mainly include mineral wool insulation products, rock wool and its products, glass wool products, inorganic solid gas insulation materials, composite nanoporous super insulation materials, etc.; organic materials mainly include polyimide foam materials, rubber and plastic insulation products, polyurethane foam materials, etc. At present, the development trend of fireproof materials at home and abroad is light weight, environmental protection, and beauty. Therefore, in addition to meeting the specific functional requirements of fire separation, fireproof insulation materials are usually required to have the following properties: light weight, high strength, corrosion resistance, etc.

[0005] The junction box is one of the auxiliary equipment for circuit layout. When installing wires, the junction box is often used as a transition at the joint of the wires. The wires are connected and tapped in the junction box. The junction box plays a role in protecting the safety of the wire connection, preventing leakage, and ensuring the connection of the wiring parts is stable. When the ship is sailing at sea, due to the harsh marine environment, high humidity, strong salt spray corrosion, and obvious swaying of the ship, the marine junction box used on the ship is required to be light in weight, high in strength, corrosion-resistant, and stable in connection. In the cabin protection area, the marine junction box is also required to be fire-retardant.

[0006] However, the flame retardant performance of marine fireproof insulation materials is poor. After a fire occurs in the hull, the high temperature resistance of the marine junction box is poor, the flame retardant effect is poor, the installation is not firm, and after ignition, it cannot effectively prevent the spread of the fire, and the production cost is high. In addition, when there are many lines, the conventional junction box cavity is small and it is difficult to meet the use requirements. The fixed partitioned junction box cavity cannot be adjusted according to the application requirements, which is inconvenient to use.

[0007] Due to global climate change, eutrophication of water bodies and other reasons, the large marine algae Enteromorpha has frequently erupted in green tides. A large amount of Enteromorpha floats and gathers on the shore, blocking the waterway. At the same time, Enteromorpha needs to consume a lot of oxygen when it rots and reproduces after a large amount of accumulation, and emits a foul odor, which destroys the marine ecosystem and seriously threatens the development of coastal fisheries and tourism. Enteromorpha has a high cellulose content in its cell wall, and the cellulose extract has a loose mesh structure with good performance in terms of water absorption, physical and mechanical properties. Therefore, we can vigorously develop the application of Enteromorpha cellulose, turn waste into treasure, and expand the application of Enteromorpha resources. Summary of the invention:

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art. Aiming at the shortcomings of the existing marine junction box, such as poor high temperature resistance, poor flame retardant effect, fixed box cavity space layout, and loose installation, a marine high temperature resistant flame retardant material and a B-15 grade fireproof bulkhead box are designed under the condition of ensuring easy use.

[0009] In order to achieve the above-mentioned purpose, the present invention relates to a B-15 grade fireproof bulkhead box, the main structure of which includes a box shell, a box inner shell, a support base, an aluminum strip, an expansion and contraction groove, a reserved hole, a fixing plate groove, a fastening screw, a metal clamping plate, an external fixing groove, a buckle fastening plate, an internal fixing hole groove, and a fixing screw; the box shell is provided with more than two reserved holes, and the reserved holes are used for the passage of wires after being opened; the box shell is nested and installed on the outside of the box inner shell, and a support base is integrally provided at the lower part of the box inner shell, and the support base is composed of four end corners and arc edges between every two end corners. The four protruding end corners of the support base increase the contact area between the box body and the thin wall, and the installation is more stable; an internal fixing hole groove is provided inside the box inner shell, and the fixing screw is threadedly connected with the internal fixing hole groove; an external fixing groove is provided inside the box inner shell, and the external fixing groove passes through the box inner shell and communicates with the box shell, and the external fixing groove is composed of a cylindrical groove cavity at the lower end and a recessed semi-cylindrical groove cavity in the upper and middle parts of the box shell; the fastening screw penetrates into the external fixing groove, and the fastening screw is set in the front middle There is a metal pallet, one end of which is provided with a through hole, and the metal pallet is mounted on the fastening screw through the through hole. The other end of the metal pallet is pointed, and the pointed end of the metal pallet can be more tightly combined with the thin wall during installation. The front end of the fastening screw is threaded and fastened with a fastening plate. During installation, the fastening plate can be against the through hole end of the metal pallet, and the fastening plate is fastened to limit the metal pallet; a fixing plate groove is provided at the front end of the external fixing groove, and the fixing plate groove is located at the top of the box shell. When the B-15 fireproof bulkhead box is packaged and transported The fixing plate groove is used to place the fastening plate, and the fixing plate groove relies on friction to fix the fastening plate to prevent the fastening screws, metal clamping plate and fastening plate from moving significantly; the box shell is provided with a grid composed of two aluminum strips interwoven, and the grid not only plays an anti-static role when the product burns, but also can tightly wrap the B-15 fireproof bulkhead box. Once burning occurs, it reduces the burning dripping of the B-15 fireproof bulkhead box and the splashing of fragments after the explosion, thereby increasing its flame retardant effect.

[0010] Furthermore, the box shell as a whole is an integrated structure with a cylindrical lower portion and a truncated cone upper portion, and the upper side wall of the box shell is provided with more than two reserved holes; the box shell is nested in the outside of the box inner shell and fixedly connected, and a support base is integrally provided at the lower part of the box inner shell, and the support base is composed of four end corners and arc edges between every two end corners; a group of internal fixing hole grooves are axially symmetrically provided inside the box inner shell, and the fixing hole grooves are cylindrical as a whole, and the fixing screws are threadedly connected with the internal fixing hole grooves; a group of external fixing grooves are also axially symmetrically provided inside the box inner shell, and the external fixing grooves are spaced apart from the fixing hole grooves;

[0011] Furthermore, the B-15 fireproof bulkhead box has one or more partitions disposed in the inner shell of the box, the partitions being fixed in the inner shell of the box, and the partitions evenly dividing the groove cavity of the inner shell of the box. When multiple lines enter the B-15 fireproof bulkhead box for connection, the partitions can reduce the mutual influence of the multiple connection lines and improve safety.

[0012] Furthermore, a card board reserved hole is set on the partition plate. When the line entering the internal slot cavity of the junction box needs to be divided into two branches for connection, the card board reserved hole is opened so that one branch of the slot cavity on one side of the partition plate enters the slot cavity on the other side of the partition plate through the card board reserved hole to make a circuit connection.

[0013] In order to connect more lines in a B-15 fireproof bulkhead box, holes are opened on a thin wall for installation at one time, which saves the cost of drilling holes for installation and materials, and expands the groove cavity of the B-15 fireproof bulkhead box. The box shell of the B-15 fireproof bulkhead box is an integrated structure with an elliptical cylinder at the bottom and an elliptical cone at the top, and reserved holes are arranged at the four end corners of the upper side wall of the box shell; a group of internal fixing hole grooves are axially symmetrically arranged on the two short side walls inside the box inner shell, and a group of external fixing grooves are centrally symmetrically arranged on the two long side walls inside the box inner shell, and the external fixing grooves are located close to the end corners of the box inner shell, and the external fixing grooves are arranged at intervals from the fixing hole grooves. In order to improve the stability and strength of the B-15 fireproof bulkhead box, reinforcing ribs are symmetrically arranged on the top edge inside the box inner shell.

[0014] In order to further expand the internal installation space of the B-15 fireproof bulkhead box, the B-15 fireproof bulkhead box is improved; the box shell of the B-15 fireproof bulkhead box is an integrated structure with an elliptical cylinder at the bottom and an elliptical cone at the top, and more than four reserved holes are arranged on the upper long side wall of the box shell; more than two groups of internal fixing hole grooves are axially symmetrically arranged on the two long side walls inside the box inner shell, and the fixing hole grooves are cylindrical as a whole; due to the large volume of the box groove cavity, in order to increase the installation stability, a group of external fixing grooves are axially symmetrically arranged in the middle of the short side wall and the middle of the long side wall inside the box inner shell respectively; in order to improve the stability and strength of the B-15 fireproof bulkhead box, reinforcing ribs are symmetrically arranged on the top edge inside the box inner shell.

[0015] In order to freely adjust the internal partition of the box cavity of the B15-D fireproof bulkhead box according to wiring needs, reasonably plan the application of the slot cavity of the B15-A fireproof bulkhead box, and reduce the impact between lines; the box inner shell of the B15-D fireproof bulkhead box is provided with more than one partition plate, which is composed of a short card plate and a long card plate. A short card slot is provided in the middle of the short card plate. The short card plate and the long card plate are fixedly connected by inserting a card in the short card slot. The upper end surfaces of the short card plate and the long card plate after connection are flush; the long card plate is fixed inside the box inner shell, and the fixing position of the short card plate can be freely adjusted;

[0016] Furthermore, a group of clamps are symmetrically arranged on both sides of the short card board, and the clamp is provided with a spring box, which is fixed on the side wall of the short card board, and a spring is installed in the internal chamber of the spring box, the front end of the spring is abutted against the front wall of the spring box, and the rear end of the spring is abutted against the front end of the push-pull plate, and the push-pull plate extends from the notch arranged at the rear end of the spring box, and the upper and lower side walls of the spring box are respectively provided with push-pull notches, and the push-pull rod passes through the push-pull notch and is connected with the push-pull plate; the rear end of the push-pull plate is fixedly connected to the middle of the longitudinal plate, and the upper and lower ends of the longitudinal plate are symmetrically provided with transverse abutment plates, which are limited in the notches of the limit frame, and the limit frame is fixed on the side wall of the short card board, and the rear end of the transverse abutment plate is abutted against the side wall of the long card board; the short card board and the long card board are fixed by the friction force between the rear end of the transverse abutment plate and the side wall of the long card board; a longitudinal abutment plate is also arranged at the rear half of the transverse abutment plate, the longitudinal abutment plate on the upper side of the clamp abuts against the upper wall of the box inner shell, and the longitudinal abutment plate on the lower side of the clamp abuts against the connected circuit device wall.

[0017] When multiple lines enter the B15-D fireproof bulkhead box for connection, according to the number of lines connected to the B15-D fireproof bulkhead box, pull the push-pull rod to drive the push-pull plate to move, and the rear end of the lateral abutment plate is separated from the abutment state with the side wall of the long pallet. The fixed positions of the short pallet and the long pallet are adjusted, and the partition layout of the shell slot cavity in the box is changed to adapt to different wiring space requirements. In addition, the partition plate can reduce the mutual influence of multiple connection lines and improve the safety of line connection.

[0018] The side wall of the box shell is also provided with an expansion and contraction groove. When an explosion occurs inside the B-15 fireproof bulkhead box, the expansion and contraction groove provides a certain expansion space, thereby reducing the risk of the B-15 fireproof bulkhead box bursting.

[0019] In order to improve the stability and strength of the B-15 fireproof bulkhead box, reinforcing ribs are symmetrically arranged on the top edge of the inner shell of the box.

[0020] The specific installation method of the B-15 fireproof bulkhead box is:

[0021] (1) Fixing of the junction box: a through-wall groove is provided on the thin wall, and the B-15 fireproof bulkhead box is installed in the through-wall groove. The fastening screws are rotated to make the pointed end of the metal clamping plate tightly fit with one side of the thin wall. The fastening plate is buckled to hold the metal clamping plate against the thin wall for position fixing. The supporting base is tightly fitted with the other side of the thin wall, and the B-15 fireproof bulkhead box is fixed on the thin wall.

[0022] (2) Line introduction: according to the number of lines to be connected, use a drill or other tools to drill through the reserved holes of the B-15 fireproof bulkhead box, and insert the pipelines into the internal groove cavity of the B-15 fireproof bulkhead box through the reserved holes;

[0023] (3) Connecting circuit components: Connect the circuit components to the pipelines and fix them to the B-15 fireproof bulkhead box by means of fixing screws that cooperate with the internal fixing holes. In the thin-wall circuit installation environment, the B-15 fireproof bulkhead box avoids the exposure of the line lead-in connection terminal, ensuring the safety of electricity use. At the same time, when a fire occurs outside or inside the line connection terminal, it can effectively delay the spread of the fire.

[0024] The outer shell and inner shell of the B-15 fireproof bulkhead box are formed by injection molding of fireproof and flame-retardant materials, and the fireproof and flame-retardant material is a marine high-temperature resistant flame-retardant material. The raw materials of the marine high-temperature resistant flame-retardant material include the following components by weight: polypropylene 40-50%, flame retardant 10-15%, graphite 30-35%, antioxidant 1-2%, antistatic agent 0.5-1%, antioxidant 2-3%, and calcium carbonate 0.5-1.5%. The preparation method of the marine high-temperature resistant flame-retardant material includes the following steps:

[0025] S1. Preparation of modified flame retardant

[0026] (1) crushing the Enteromorpha to 200-400 mesh, placing it in twice the volume of water, heating it to 60-70° C., stirring and dissolving it for 0.5-1h, then adding a sodium hydroxide solution with a mass fraction of 30-40% until the pH value of the solution reaches 7.2-8.0, stirring it at a constant temperature of 60-70° C. for 20-30 minutes, and adding ethanol to the filtrate obtained after filtering to remove water to obtain Enteromorpha slurry; adding the Enteromorpha slurry to a 2-25wt% alkylsilane ethanol solution, adding a 0.1-20wt% acetic acid solution dropwise, heating it to 60-80° C., stirring and reacting it for 24-36 hours, and obtaining a hydrophobic Enteromorpha fiber stock solution;

[0027] (2) adding 4-chlorophenoxyethylene silane and sodium dodecylbenzene sulfonate to deionized water and stirring at 60-70° C. for 20-30 min, then adding the hydrophobic Enteromorpha fiber stock solution, heating to 60-70° C., stirring for 2-3 h, and filtering after the reaction is completed and washing the product with ethanol for 3-5 times to obtain a modified flame retardant;

[0028] The mass ratio of the enteromorpha, water, 30-40% sodium hydroxide solution, 2-25wt% alkylsilane ethanol solution and 0.1-20wt% acetic acid is 12-16:20-25:3-5:15-20:2-6; the ethanol used for filtering the enteromorpha slurry is 95% ethanol by volume, and the amount of ethanol used for filtering the enteromorpha slurry is 1-3 times the volume of the enteromorpha slurry;

[0029] The amount of sodium dodecylbenzene sulfonate added is 3.2-4.6% of the mass of 4-chlorophenoxyethyleneoxysilane, the deionized water is 6-8 times the mass of 4-chlorophenoxyethyleneoxysilane; the Enteromorpha hydrophobic fiber stock solution is 10-30% of the mass of 4-chlorophenoxyethyleneoxysilane; the volume ratio of ethanol used for washing is 95% ethanol, and the amount of ethanol used for washing is 1-2 times the mass of 4-chlorophenoxyethyleneoxysilane;

[0030] S2. Blending

[0031] Add polypropylene, antioxidant, antistatic agent and antioxidant into a mixer, stir at a speed of 400-600 r / min for 30-45 min, then add modified flame retardant, graphite and calcium carbonate and continue stirring for 20-30 min to obtain a mixture;

[0032] The antioxidant is a phenolic antioxidant or a complexing antioxidant; the antioxidant is a polyphenolic antioxidant or a mineral antioxidant; the antistatic agent is a quaternary ammonium salt type or a polyether type polymer antistatic agent;

[0033] S3, melt extrusion

[0034] The mixed material is added into a twin-screw extruder for melt extrusion, and then injection molded at 210-230° C. to obtain a high temperature resistant flame retardant material for ships.

[0035] During the melt extrusion, the temperatures of the various zones of the twin-screw extruder are set as follows: 160-170°C for zone one, 170-180°C for zone two, 180-190°C for zone three, 190-200°C for zone four, 200-210°C for zone five, 195-205°C for zone six, and 175-185°C for zone seven, and the main engine speed is 120-150rpm.

[0036] The technical effects achieved by the present invention are:

[0037] (1) The B-15 fireproof bulkhead box expands the space of the box cavity, and the box cavity space can be adjusted according to the number of wiring connections. Its unique structural design improves structural stability and installation stability. The grid formed by the outer aluminum sheet not only plays an anti-static role when the product burns, but also can tightly wrap the product, slow down the spread of fire, and extend the escape time; the combination design of fastening screws, metal clamps, external fixing grooves, and buckle fastening plates better fixes the product and firmly locks the product so that it will not loosen easily; the pointed iron sheet in the middle of the metal clamp better increases the locking force of the product, making it less likely to loosen and fall off when the external environment changes. The one-piece box shell and the box shell are combined to enhance the fireproof performance. Multiple internal fixing holes and corresponding fixing screws simplify the installation and maintenance process. The reinforcement ribs on the inside of the box enhance the mechanical strength, and the reserved wiring holes improve safety. The overall design not only meets the functionality, but also takes into account the aesthetics, providing users with a safe, efficient, durable and beautiful electrical installation solution. B-15 fireproof bulkhead boxes can be used in thin-walled places such as ship bulkheads, indoor partition walls, temporary housing walls (construction sheds, offices, etc.), and have broad application prospects.

[0038] (2) The marine high temperature resistant flame retardant material prepared by the present invention has excellent high temperature resistance, the pyrolysis starting temperature is greater than 750°C, and the cost of polypropylene is low, which can greatly reduce the cost of high temperature resistant flame retardant materials; the prepared marine high temperature resistant flame retardant material has good flame retardant effect, reaching the V-0 level of UL-94. The silicon-based flame retardant is compounded with the hydrophobic Enteromorpha fiber stock solution, which not only improves the flame retardant performance of the material, but also improves the toughness of the material, and makes full use of the Enteromorpha resources, turning waste into treasure, and is environmentally friendly. The B-15 fireproof bulkhead box made of marine high-temperature resistant flame-retardant materials is light in weight, high in strength, corrosion-resistant, and has excellent fire-retardant properties, reaching the B15 fireproof grade of ships (that is, the B-15 grade that meets the fireproof grade requirements of ship structures. The B-15 grade means that the ship structure should be able to prevent the passage of flames from the initial half-hour fire resistance test to the end, and should have such a thermal insulation level that within 15 minutes, the average temperature of the back-fire surface shall not exceed 139 degrees compared to the original temperature, and at any point. The temperature including any joints shall not exceed 225 degrees compared to the original temperature.) The marine high-temperature resistant flame-retardant material can not only be used in the preparation of ship fireproof equipment, but also in factory ports such as mines, metallurgy, power plants, chemical manufacturing, port operations, temporary houses on construction sites, etc., with a wide range of application scenarios. Description of the drawings:

[0039] Figure 1 This is a schematic diagram of the structural principle of the exterior of the B-15 class fireproof bulkhead box described in Example 1 of the present invention.

[0040] Figure 2This is a schematic diagram of the structural principle of the interior of the B-15 class fireproof bulkhead box described in Example 1 of the present invention.

[0041] Figure 3 This is a schematic diagram of the installation of the B-15 class fireproof bulkhead box described in Example 1 of the present invention.

[0042] Figure 4 This is a schematic diagram of the partition plate described in Example 2 of the present invention.

[0043] Figure 5 This is a schematic diagram of the structural principle of the exterior of the B-15 class fireproof bulkhead box described in Example 3 of the present invention.

[0044] Figure 6 This is a schematic diagram of the structural principle of the interior of the B-15 class fireproof bulkhead box described in Example 3 of the present invention.

[0045] Figure 7 This is a schematic diagram of the structural principle of the exterior of the B-15 class fireproof bulkhead box described in Example 4 of the present invention.

[0046] Figure 8 This is a schematic diagram of the structural principle of the interior of the B-15 class fireproof bulkhead box described in Example 4 of the present invention.

[0047] Fig. 9 This is a schematic diagram of the adjustable partition plate described in Example 4 of the present invention. Specific implementation method:

[0048] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0049] Embodiment 1:

[0050] The present embodiment involves a B-15 class fireproof bulkhead box, comprising a box outer shell 1, a box inner shell 2, a support base 3, an aluminum strip 4, an expansion and contraction slot 5, a reserved hole 6, a fixing plate slot 7, a fastening screw 8, a metal clamping plate 9, an outer fixing slot 10, a buckle fastening plate 11, an inner fixing hole slot 12, and a fixing screw 13; Figure 1 As shown, the box shell as a whole is an integrated structure with a cylindrical lower portion and a truncated cone upper portion. The upper side wall of the box shell 1 is provided with more than two reserved holes 6, and the reserved holes 6 are opened for the wires to pass through; the box shell 1 is nested and fixedly connected to the outside of the box inner shell 2, and a support base 3 is integrally provided at the lower portion of the box inner shell 2, as shown in FIG. Figure 2As shown, the support base 3 is composed of four end corners and arc edges between every two end corners. The four protruding end corners of the support base 3 increase the contact area between the box body and the thin wall (such as the cabin wall), and the installation is more stable; a group of internal fixing hole grooves 12 are axially symmetrically arranged inside the box inner shell 2, and the fixing hole grooves 12 are cylindrical as a whole. The fixing screws 13 are threadedly connected with the internal fixing hole grooves 12; a group of external fixing grooves 10 are also axially symmetrically arranged inside the box inner shell 2, and the external fixing grooves 10 are spaced apart from the fixing hole grooves 12. The external fixing grooves 10 pass through the box inner shell 2 and communicate with the box outer shell 1. The external fixing grooves 10 are composed of a cylindrical groove cavity at the lower end and a semi-cylindrical groove cavity recessed in the upper and middle parts of the box outer shell 1 shaped groove cavity; the fastening screw 8 penetrates into the external fixing groove 10, and a metal clamping plate 9 is mounted on the front middle part of the fastening screw 8. A through hole is set at one end of the metal clamping plate 9, and the metal clamping plate 9 is mounted on the fastening screw 8 through the through hole. The other end of the metal clamping plate 9 is pointed. When installed, the pointed end of the metal clamping plate 9 can be more tightly combined with the thin wall (depending on the material of the thin wall, the degree to which the pointed end of the metal clamping plate 9 penetrates the thin wall is different). The front end of the fastening screw 8 is threadedly installed with a fastening plate 11. When installed, the fastening plate 11 can resist the through hole end of the metal clamping plate 9, and the fastening plate 11 is fastened to the metal clamping plate 9 for position fixing; the front end of the external fixing groove 10 is provided with a fixing plate groove 7, such as Figure 1 As shown, the fixing plate groove 7 is located at the top of the box shell 1. When the B-15 class fireproof bulkhead box is packaged and transported, the fixing plate groove 7 is used to place the fastening plate 11. The fixing plate groove 7 relies on friction to fix the fastening plate 11 to prevent the fastening screws 8, the metal clamping plate 9, and the fastening plate 11 from moving significantly.

[0051] The box shell 1 is provided with a grid composed of two aluminum strips 4 interwoven together. The grid not only plays an anti-static role when the product burns, but also can tightly wrap the B-15 class fireproof bulkhead box. Once burning occurs, the burning dripping of the B-15 class fireproof bulkhead box and the splashing of fragments after explosion are reduced, thereby increasing its flame retardant effect.

[0052] The side wall of the box shell 1 is also provided with an expansion and contraction groove 5. When an explosion occurs inside the B-15 fireproof bulkhead box, the expansion and contraction groove 5 provides a certain expansion space to reduce the risk of the B-15 fireproof bulkhead box bursting.

[0053] In order to improve the stability and strength of the B-15 fireproof bulkhead box, reinforcing ribs 26 are symmetrically arranged on the top edge of the inner shell 2 of the box.

[0054] The outer box shell 1 and the inner box shell 2 of the B-15 fireproof bulkhead box are formed by injection molding of fireproof and flame-retardant materials. The B-15 fireproof bulkhead box achieves its own structural stability and firm installation through its unique structural design. The grid formed by the outer aluminum sheet has the functions of anti-static and reducing the spread of combustion. It has high safety and beautiful structure, and can be applied to thin-walled places such as ship cabin walls, indoor partition walls, and temporary housing walls.

[0055] like Figure 3 As shown, the specific installation method of the B-15 fireproof bulkhead box is:

[0056] (1) Fixing the junction box: a through-wall groove is provided on a thin wall such as a cabin plate, a thin indoor partition wall, or a temporary housing (a construction site shed, an office, etc.), and the B-15 fireproof bulkhead box is installed in the through-wall groove. The fastening screw 8 is rotated to tightly engage the pointed end of the metal clamping plate 9 with one side of the thin wall. The fastening plate 11 is fastened to hold the metal clamping plate 9 against the thin wall for position fixing. The supporting base 3 is tightly fitted with the other side of the thin wall, and the B-15 fireproof bulkhead box is fixed on the thin wall.

[0057] (2) Line introduction: according to the number of lines to be connected, use a drill or other tool to drill through the reserved hole 6 of the B-15 fireproof bulkhead box, and insert the pipeline into the internal groove cavity of the B-15 fireproof bulkhead box through the reserved hole 6;

[0058] (3) Connecting circuit components: Connect switches, plug sockets, lamps and other circuit components to pipelines, and connect the circuit components to the B-15 fireproof bulkhead box by matching the fixing screws 13 with the internal fixing holes 12. In the thin-wall circuit installation environment, the B-15 fireproof bulkhead box avoids the exposure of the line lead-in connection end, ensuring the safety of electricity use. At the same time, when a fire occurs outside or inside the line connection end, it can effectively delay the spread of the fire.

[0059] Embodiment 2:

[0060] In the B-15 fireproof bulkhead box described in Example 1, the inner shell 2 of the box is provided with one or more partition plates 14, which are fixed in the inner shell 2 of the box. The partition plates 14 evenly divide the groove cavity of the inner shell 2 of the box. When multiple lines enter the B-15 fireproof bulkhead box for connection, the partition plates 14 can reduce the mutual influence of the multiple connection lines and improve safety.

[0061] like Figure 4 As shown, a card board reserved hole is provided on the partition plate 14. When the circuit entering the internal slot cavity of the junction box needs to be divided into two branches for connection, the card board reserved hole is opened so that one branch of the slot cavity on one side of the partition plate 14 enters the slot cavity on the other side of the partition plate 14 through the card board reserved hole to perform circuit connection.

[0062] Embodiment 3:

[0063] Because the B-15 fireproof bulkhead box sometimes needs to connect too many lines (such as temporary offices on construction sites, which need to install network cables, circuits and other pipelines), in order to facilitate the one-time installation of holes in thin walls and save installation and material costs, the B-15 fireproof bulkhead box needs to have a larger groove cavity; a B-15 fireproof bulkhead box involved in Example 1 is improved; Figure 5 ,6 As shown, based on a B-15 class fireproof bulkhead box structure involved in Example 1, its box shell 1 as a whole is an integrated structure with an elliptical cylinder at the lower part and an elliptical cone at the upper part, and reserved holes 6 are arranged at the four end corners of the upper side wall of the box shell 1; a group of inner fixing hole grooves 12 are axially symmetrically arranged on the two short side walls inside the box inner shell 2, and a group of outer fixing grooves 10 are centrally symmetrically arranged on the two long side walls inside the box inner shell 2, and the outer fixing grooves 10 are located close to the end corners of the box inner shell 2, and the outer fixing grooves 10 are spaced apart from the fixing hole grooves 12. In order to improve the stability and strength of the B-15 class fireproof bulkhead box, reinforcing ribs 26 are symmetrically arranged on the top edge inside the box inner shell 2.

[0064] Embodiment 4:

[0065] In order to further expand the internal installation space of the B-15 fireproof bulkhead box, facilitate the one-time installation of holes in the thin wall, and save the installation and material costs; a B-15 fireproof bulkhead box involved in Example 1 is improved; Figure 7 , 8 As shown, based on a B-15 class fireproof bulkhead box structure involved in Example 1, its box shell 1 as a whole is an integrated structure with an elliptical cylinder at the bottom and an elliptical cone at the top, and more than four reserved holes 6 are arranged on the upper long side wall of the box shell 1; more than two groups of internal fixing hole grooves 12 are axially symmetrically arranged on the two long side walls inside the box inner shell 2, and the fixing hole grooves 12 are cylindrical as a whole; due to the large volume of the box groove cavity, in order to increase the installation stability, a group of external fixing grooves 10 are axially symmetrically arranged in the middle of the short side wall and the middle of the long side wall inside the box inner shell 2 respectively; in order to improve the stability and strength of the B-15 class fireproof bulkhead box, reinforcing ribs 26 are symmetrically arranged on the top edge inside the box inner shell 2.

[0066] The B-15 fireproof bulkhead box is fixedly connected to the circuit device through the cooperation of fixing screws 13 and internal fixing holes 12.

[0067] In order to freely adjust the internal partition of the B15-D fireproof bulkhead box according to wiring needs, rationally plan the application of the slot cavity of the B15-A fireproof bulkhead box, and reduce the impact between lines; the B15-D fireproof bulkhead box described in Example 1, such as Fig. 9 As shown, the box inner shell 2 is provided with more than one partition plate 14, and the partition plate 14 is composed of a short card board 16 and a long card board 17. A short card slot is provided in the middle of the short card board 16, and the short card board 16 and the long card board 17 are fixedly connected by inserting the card in the short card slot. After the connection, the upper end surfaces of the short card board 16 and the long card board 17 are flush; the long card board 17 is fixed inside the box inner shell 2, and the fixed position of the short card board 16 can be freely adjusted.

[0068] A group of clamps are symmetrically arranged on both sides of the short clamp 16, and the clamps are provided with a spring box 18, which is fixed on the side wall of the short clamp 16. A spring is installed in the internal chamber of the spring box 18, and the front end of the spring is against the front wall of the spring box 18, and the rear end of the spring is connected with the front end of the push-pull plate 25. The push-pull plate 25 extends from the notch arranged at the rear end of the spring box 18, and the upper and lower side walls of the spring box 18 are respectively provided with push-pull notches 19, and the push-pull rod 20 passes through the push-pull notches 19 and is connected with the push-pull plate 25; the rear end of the push-pull plate 25 is fixedly connected to the middle part of the longitudinal plate 21. Horizontal abutment plates 24 are symmetrically arranged at the upper and lower ends of the longitudinal plate 21. The horizontal abutment plates 24 are limited in the grooves of the limit frame 22. The limit frame 22 is fixed on the side wall of the short card board 16. The rear end of the horizontal abutment plate 24 abuts against the side wall of the long card board 17. The short card board 16 and the long card board 17 are fixed by the friction force between the rear end of the horizontal abutment plate 24 and the side wall of the long card board 17. A longitudinal abutment plate 23 is also arranged at the rear half of the horizontal abutment plate 24. The longitudinal abutment plate 23 on the upper side of the clamp abuts against the upper wall of the box inner shell 2, and the longitudinal abutment plate 23 on the lower side of the clamp abuts against the wall of the connected circuit device.

[0069] When multiple lines enter the B15-D fireproof bulkhead box for connection, according to the number of lines connected to the B15-D fireproof bulkhead box, pull the push-pull rod 20 to drive the push-pull plate 25 to move, and the rear end of the horizontal abutment plate 24 is separated from the abutment state with the side wall of the long card plate 17, and the fixed positions of the short card plate 16 and the long card plate 17 are adjusted to change the partition layout of the groove cavity of the inner shell 2 of the box to adapt to different wiring space requirements, and the partition plate 14 can reduce the mutual influence of multiple connecting lines and improve the safety of line connection.

[0070] Embodiment 5:

[0071] Embodiment 1 involves a B-15-class fireproof bulkhead box, wherein the outer box shell 1 and the inner box shell 2 of the B-15-class fireproof bulkhead box are made of fireproof and flame-retardant materials, and the fireproof and flame-retardant materials are made of a marine high-temperature resistant flame-retardant material, and the raw materials of the marine high-temperature resistant flame-retardant material include the following components by mass proportion: polypropylene 40-50%, flame retardant 10-15%, graphite 30-35%, antioxidant 1-2%, antistatic agent 0.5-1%, antioxidant 2-3%, and calcium carbonate 0.5-1.5%. The preparation method of the marine high-temperature resistant flame-retardant material comprises the following steps:

[0072] S1. Preparation of modified flame retardant

[0073] (1) crushing the Enteromorpha to 200-400 mesh, placing it in twice the volume of water, heating it to 60-70° C., stirring and dissolving it for 0.5-1h, then adding a sodium hydroxide solution with a mass fraction of 30-40% until the pH value of the solution reaches 7.2-8.0, stirring it at a constant temperature of 60-70° C. for 20-30 minutes, and adding ethanol to the filtrate obtained after filtering to remove water to obtain Enteromorpha slurry; adding the Enteromorpha slurry to a 2-25wt% alkylsilane ethanol solution, adding a 0.1-20wt% acetic acid solution dropwise, heating it to 60-80° C., stirring and reacting it for 24-36 hours, and obtaining a hydrophobic Enteromorpha fiber stock solution;

[0074] (2) Add 4-chlorophenoxyethylene silane and sodium dodecylbenzene sulfonate to deionized water and stir at 60-70° C. for 20-30 min, then add the hydrophobic Enteromorpha fiber stock solution, raise the temperature to 60-70° C., stir for 2-3 h, and after the reaction is completed, filter and wash the product with ethanol for 3-5 times to obtain a modified flame retardant.

[0075] The mass ratio of the enteromorpha, water, 30-40% sodium hydroxide solution, 2-25wt% alkylsilane ethanol solution and 0.1-20wt% acetic acid is 12-16:20-25:3-5:15-20:2-6; the ethanol used for filtering the enteromorpha slurry is 95% ethanol by volume, and the amount of ethanol used for filtering the enteromorpha slurry is 1-3 times the volume of the enteromorpha slurry;

[0076] The amount of sodium dodecylbenzene sulfonate added is 3.2-4.6% of the mass of 4-chlorophenoxyethyleneoxysilane, the deionized water is 6-8 times the mass of 4-chlorophenoxyethyleneoxysilane; the Enteromorpha hydrophobic fiber stock solution is 10-30% of the mass of 4-chlorophenoxyethyleneoxysilane; the volume ratio of ethanol used for washing is 95% ethanol, and the amount of ethanol used for washing is 1-2 times the mass of 4-chlorophenoxyethyleneoxysilane;

[0077] S2. Blending

[0078] Add polypropylene, antioxidant, antistatic agent and antioxidant into a mixer, stir at a speed of 400-600 r / min for 30-45 min, then add modified flame retardant, graphite and calcium carbonate and continue stirring for 20-30 min to obtain a mixture;

[0079] Preferably, the antioxidant is a phenolic antioxidant or a complex antioxidant; the antioxidant is a polyphenolic antioxidant or a mineral antioxidant; the antistatic agent is a quaternary ammonium salt type or a polyether type polymer antistatic agent;

[0080] S3, melt extrusion

[0081] The mixed material is added into a twin-screw extruder for melt extrusion, and then injection molded at 210-230° C. to obtain a high temperature resistant flame retardant material for ships.

[0082] During the melt extrusion, the temperatures of the various zones of the twin-screw extruder are set as follows: 160-170°C for zone one, 170-180°C for zone two, 180-190°C for zone three, 190-200°C for zone four, 200-210°C for zone five, 195-205°C for zone six, and 175-185°C for zone seven, and the main engine speed is 120-150rpm.

[0083] The ship-use high temperature resistant flame retardant material is light in weight, high in strength, corrosion resistant, and has excellent fire retardant properties. It can not only be used in the preparation of ship fire protection equipment, but also in mining, metallurgy, power plants, chemical manufacturing, port operations, temporary houses on construction sites and other factory ports, with a wide range of application scenarios.

Claims

1. A B-15 fireproof bulkhead box, characterized by: It includes a box shell, a box inner shell, a support base, an aluminum strip, a reserved hole, a fixing plate groove, a fastening screw, a metal clamping plate, an external fixing groove, a buckle fastening plate, an internal fixing hole groove, and a fixing screw; the box shell is provided with more than two reserved holes, and the reserved holes are used for the wires to pass through after being opened; the box shell is nested and installed on the outside of the box inner shell, and a support base is integrally provided at the lower part of the box inner shell, and the support base is composed of four end corners and an arc edge between every two end corners; an internal fixing hole groove is provided inside the box inner shell, and the fixing screw is threadedly connected to the internal fixing hole groove; an external fixing groove is provided inside the box inner shell, and the external fixing groove passes through the box inner shell and communicates with the box shell, and the external fixing groove passes through the box inner shell and communicates with the box outer shell. The fixing groove is composed of a cylindrical groove cavity at the lower end and a recessed semi-cylindrical groove cavity in the upper and middle part of the box shell; the fastening screw is inserted into the external fixing groove, and a metal clamping plate is set in the front middle part of the fastening screw, and a through hole is set at one end of the metal clamping plate, and the metal clamping plate is set on the fastening screw through the through hole, and the other end of the metal clamping plate is pointed. When installing, the pointed end of the metal clamping plate can be more tightly combined with the thin wall, and the front end of the fastening screw is threadedly installed with a fastening plate. When installing, the fastening plate can be against the through hole end of the metal clamping plate, and the fastening plate is fastened to the metal clamping plate for limiting and fixing; a fixing plate groove is set at the front end of the external fixing groove, and the fixing plate groove is located at the top of the box shell; The outer shell and inner shell of the B-15 grade fireproof bulkhead box are formed by injection molding of fireproof and flame-retardant materials. The fireproof and flame-retardant material adopts a marine high-temperature resistant flame-retardant material. The raw materials of the marine high-temperature resistant flame-retardant material include the following components in terms of mass proportion: 40-50% polypropylene, 10-15% flame retardant, 30-35% graphite, 1-2% antioxidant, 0.5-1% antistatic agent, 2-3% antioxidant, and 0.5-1.5% calcium carbonate.

2. The B-15 fireproof bulkhead box according to claim 1, characterized in that: The box shell as a whole is an integrated structure with a cylindrical lower portion and a truncated cone upper portion, and more than two reserved holes are arranged on the upper side wall of the box shell; the box shell is nested in the outside of the box inner shell and fixedly connected, a support base is integrally arranged at the lower part of the box inner shell, and the support base is composed of four end corners and arc edges between every two end corners; a group of internal fixing hole grooves are axially symmetrically arranged inside the box inner shell, the fixing hole grooves are cylindrical as a whole, and the fixing screws are threadedly connected to the internal fixing hole grooves; a group of external fixing grooves are also axially symmetrically arranged inside the box inner shell, and the external fixing grooves are spaced apart from the fixing hole grooves.

3. The B-15 fireproof bulkhead box according to claim 2, characterized in that: The box inner shell is provided with more than one partition plate, which is fixed inside the box inner shell and divides the groove cavity of the box inner shell into equal parts.

4. The B-15 fireproof bulkhead box according to claim 3, characterized in that: The partition plate is provided with a reserved hole for the card plate.

5. The B-15 fireproof bulkhead box according to claim 1, characterized in that: The box shell as a whole is an integrated structure with an elliptical cylindrical lower part and an elliptical cone upper part, and reserved holes are arranged at the four end corners of the upper side wall of the box shell; a group of internal fixing hole grooves are axially symmetrically arranged on the two short side walls inside the box inner shell, and a group of external fixing grooves are centrally symmetrically arranged on the two long side walls inside the box inner shell, and the external fixing grooves are located close to the end corners of the box inner shell, and the external fixing grooves are spaced apart from the fixing hole grooves.

6. The B-15 fireproof bulkhead box according to claim 1, characterized in that: The box shell as a whole is an integrated structure with an elliptical cylindrical lower part and an elliptical cone upper part. More than four reserved holes are arranged on the upper long side wall of the box shell; more than two groups of internal fixing hole grooves are axially symmetrically arranged on the two long side walls inside the box inner shell, and the fixing hole grooves are cylindrical as a whole; a group of external fixing grooves are axially symmetrically arranged in the middle of the short side wall and the middle of the long side wall inside the box inner shell.

7. The B-15 fireproof bulkhead box according to claim 6, characterized in that: The inner shell of the box is provided with more than one partition plate, which is composed of a short card plate and a long card plate. A short card slot is provided in the middle of the short card plate. The short card plate and the long card plate are fixedly connected by inserting a card into the short card slot. The upper surfaces of the short card plate and the long card plate after connection are flush; the long card plate is fixed inside the inner shell of the box, and the fixing position of the short card plate can be freely adjusted; The cam is provided with a plurality of spring plates, the spring plates being fixed on the side walls of the short card plates, the spring plates being installed in the inner chamber of the spring plates, the front end of the spring plates being abutted against the front wall of the spring plates, the rear end of the spring plates being abutted against the front end of the push-pull plates, the push-pull plates extending from the notches provided at the rear end of the spring plates, the upper and lower side walls of the spring plates being respectively provided with push-pull notches, the push-pull rods being connected to the push-pull plates through the push-pull notches; the rear end of the push-pull plates being fixedly connected to the middle of the longitudinal plates, the upper and lower ends of the longitudinal plates being symmetrically provided with transverse abutment plates, the transverse abutment plates being limited in the notches of the limiting frame, the limiting frame being fixed on the side walls of the short card plates, the rear end of the transverse abutment plates being abutted against the side walls of the long card plates; the short card plates and the long card plates are fixed by the friction force between the rear end of the transverse abutment plates and the side walls of the long card plates; the rear half of the transverse abutment plates is also provided with a longitudinal abutment plate, the longitudinal abutment plate on the upper side of the clamp abuts against the upper wall of the inner shell of the box, and the longitudinal abutment plate on the lower side of the clamp abuts against the connected circuit device wall; When multiple lines enter the B15-D fireproof bulkhead box for connection, according to the number of lines connected to the B15-D fireproof bulkhead box, pull the push-pull rod to drive the push-pull plate to move, and the rear end of the lateral abutment plate is separated from the abutment state with the side wall of the long pallet. The fixed positions of the short pallet and the long pallet are adjusted, and the partition layout of the shell slot cavity in the box is changed to adapt to different wiring space requirements. In addition, the partition plate can reduce the mutual influence of multiple connection lines and improve the safety of line connection.

8. The B-15 class fireproof bulkhead box according to any one of claims 2, 5 or 6, characterized in that: The side wall of the box shell is provided with expansion and contraction grooves, and the top edge of the inner shell of the box is symmetrically provided with reinforcing ribs; the box shell is provided with a grid composed of more than two aluminum strips interwoven.

9. The B-15 fireproof bulkhead box according to claim 8, characterized in that: The specific installation method of the B-15 fireproof bulkhead box is: (1) Fixing of the junction box: a through-wall groove is provided on the thin wall, and the B-15 fireproof bulkhead box is installed in the through-wall groove. The fastening screws are rotated to make the pointed end of the metal clamping plate tightly fit with one side of the thin wall. The fastening plate is buckled to hold the metal clamping plate against the thin wall for position fixing. The supporting base is tightly fitted with the other side of the thin wall, and the B-15 fireproof bulkhead box is fixed on the thin wall. (2) Line introduction: according to the number of lines to be connected, use a drill to drill through the reserved holes of the B-15 fireproof bulkhead box, and insert the pipelines into the internal groove cavity of the B-15 fireproof bulkhead box through the reserved holes; (3) Connecting circuit components: Connect the circuit components to the pipelines and fix them to the B-15 fireproof bulkhead box by means of fixing screws that cooperate with the internal fixing holes. In the thin-wall circuit installation environment, the B-15 fireproof bulkhead box avoids the exposure of the line lead-in connection terminal, ensuring the safety of electricity use. At the same time, when a fire occurs outside or inside the line connection terminal, it can effectively delay the spread of the fire.

10. The B-15 class fireproof bulkhead box according to claim 9, characterized in that: The method for preparing the high temperature resistant flame retardant material for ships comprises the following steps: S1. Preparation of modified flame retardant (1) crushing the Enteromorpha to 200-400 mesh, placing it in twice the volume of water, heating it to 60-70° C., stirring and dissolving it for 0.5-1h, then adding a sodium hydroxide solution with a mass fraction of 30-40% until the pH value of the solution reaches 7.2-8.0, stirring it at a constant temperature of 60-70° C. for 20-30 minutes, and adding ethanol to the filtrate obtained after filtering to remove water to obtain Enteromorpha slurry; adding the Enteromorpha slurry to a 2-25wt% alkylsilane ethanol solution, adding a 0.1-20wt% acetic acid solution dropwise, heating it to 60-80° C., stirring and reacting it for 24-36 hours, and obtaining a hydrophobic Enteromorpha fiber stock solution; (2) adding 4-chlorophenoxyethylene silane and sodium dodecylbenzene sulfonate to deionized water and stirring at 60-70° C. for 20-30 min, then adding the hydrophobic Enteromorpha fiber stock solution, heating to 60-70° C., stirring for 2-3 h, and filtering after the reaction is completed and washing the product with ethanol for 3-5 times to obtain a modified flame retardant; The mass ratio of the enteromorpha, water, 30-40% sodium hydroxide solution, 2-25wt% alkylsilane ethanol solution and 0.1-20wt% acetic acid is 12-16:20-25:3-5:15-20:2-6; the ethanol used for filtering the enteromorpha slurry is 95% ethanol by volume, and the amount of ethanol used for filtering the enteromorpha slurry is 1-3 times the volume of the enteromorpha slurry; The amount of sodium dodecylbenzene sulfonate added is 3.2-4.6% of the mass of 4-chlorophenoxyethyleneoxysilane, the deionized water is 6-8 times the mass of 4-chlorophenoxyethyleneoxysilane; the Enteromorpha hydrophobic fiber stock solution is 10-30% of the mass of 4-chlorophenoxyethyleneoxysilane; the volume ratio of ethanol used for washing is 95% ethanol, and the amount of ethanol used for washing is 1-2 times the mass of 4-chlorophenoxyethyleneoxysilane; S2. Blending Add polypropylene, antioxidant, antistatic agent and antioxidant into a mixer, stir at a speed of 400-600 r / min for 30-45 min, then add modified flame retardant, graphite and calcium carbonate and continue stirring for 20-30 min to obtain a mixture; The antioxidant is a phenolic antioxidant or a complexing antioxidant; the antioxidant is a polyphenolic antioxidant or a mineral antioxidant; the antistatic agent is a quaternary ammonium salt type or a polyether type polymer antistatic agent; S3, melt extrusion The mixed material is added into a twin-screw extruder for melt extrusion, and injection molding is performed at 210-230° C. to obtain a high temperature resistant flame retardant material for ships; During the melt extrusion, the temperatures of the various zones of the twin-screw extruder are set as follows: 160-170°C for zone one, 170-180°C for zone two, 180-190°C for zone three, 190-200°C for zone four, 200-210°C for zone five, 195-205°C for zone six, and 175-185°C for zone seven, and the main engine speed is 120-150rpm.

Images