CN114274616B

CN114274616B - Fireproof and radiation-proof vertical hinged door

Info

Publication number: CN114274616B
Application number: CN202210019007.2A
Authority: CN
Inventors: 韩佳
Original assignee: Genjiu Beijing Door Industry Co ltd
Current assignee: Genjiu (Beijing) Technology Co.,Ltd.
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-05-06
Anticipated expiration: 2042-01-10
Also published as: CN114274616A

Abstract

The invention relates to a light fireproof radiation-proof composite material and a fireproof radiation-proof vertical hinged door, wherein the light fireproof radiation-proof composite material is of a multilayer composite structure and sequentially comprises a lead alloy plate, foamed polyurethane, a functional layer, the foamed polyurethane and the lead alloy plate; the functional layer comprises a fireproof plate and a radiation protection plate. The components of the composite material are specifically selected and modified, so that the obtained composite material is light in density, excellent in comprehensive performance of mechanical property, fire resistance and radiation resistance and suitable for being used in a door structure needing fire prevention and radiation protection.

Description

Fireproof and radiation-proof vertical hinged door

Technical Field

The invention belongs to the technical field of fireproof and radiation-proof materials, and particularly relates to a light fireproof and radiation-proof composite material and a fireproof and radiation-proof vertical hinged door.

Background

In nuclear power plants, laboratories, radiology departments of hospitals and the like, radioactive sources harmful to the human body, such as X-rays, neutron rays, gamma rays and the like, can cause irreversible damage to personnel in the radiation range. Therefore, the radiation source range is avoided as much as possible, and the door of the place has the requirement of radiation protection besides the requirement of fire protection.

The existing radiation-proof materials generally adopt heavy metals such as lead and the like, but the weight of the radiation-proof materials is overlarge, for example, when the radiation-proof materials are used for an automatic door with a radiation-proof function, an automatic device passes through a transmission device such as a gear and the like, the weight of the door is overlarge, a large load is caused to transmission, and once power failure or other accidents occur, the radiation-proof door is too heavy and is difficult to open. Especially, when a fire disaster or other conditions happen, if the fire disaster or other conditions cannot be opened in time, serious potential safety hazards exist.

Inventor's former patent CN202111587209.9 discloses a light radiation-proof composite structure, which can be used for a radiation-proof door capable of automatically moving horizontally, but the density is still large, and as an automatic moving door using electric power, the density is still large, and it is hard to push the door. Therefore, it is necessary to develop a lightweight fireproof and radiation-proof composite structure with lower density as a door leaf structure of a vertical hinged door.

Disclosure of Invention

Aiming at the problems, the invention provides a light fireproof radiation-proof composite material and a fireproof radiation-proof vertical hinged door.

The invention provides a light fireproof radiation-proof composite material which is a multilayer composite structure and sequentially comprises a lead alloy plate, foamed polyurethane, a functional layer, foamed polyurethane and a lead alloy plate; the functional layer comprises a fireproof plate and a radiation-proof plate;

the fireproof plate is prepared from the following raw materials in parts by mass: 50-65 parts of xonotlite-SiO₂The aerogel composite material comprises 34-40 parts of borax, 13-18 parts of zirconate coupling agent modified boron fibers, 7-11 parts of epoxy resin, 12-18 parts of flame retardant, 20-30 parts of adhesive and 3-5 parts of polyisocyanate;

the radiation-proof plate is prepared from the following raw materials: 60-80 parts of sulfur-containing resin, 40-70 parts of radiation-proof filler, 100-200 parts of cement, 50-70 parts of water and 1-1.8 parts of water reducing agent.

Preferably, the functional layer comprises at least one layer of fire protection plate and at least one layer of radiation protection plate; when the number of the fireproof plates and/or the radiation protection plates is more than one layer, the fireproof plates and the radiation protection plates are alternately arranged.

Preferably, the lead alloy plate has a thickness of 1-5mm, preferably 1-2 mm; 10-30mm, preferably 20-30mm of foamed polyurethane; the total thickness of the fire protection plate is 30-100mm, preferably 50-70 mm; the total thickness of the radiation-proof plate is 20-50mm, and preferably 30-40 mm.

The xonotlite-SiO₂The aerogel composite material is obtained by a preparation method comprising the following steps: placing xonotlite in a vacuum device, vacuumizing, and adding SiO₂Sucking the gel precursor solution into a vacuum device, and immersing xonotlite, xonotlite and SiO₂Compounding gel precursors, standing for 20-30h to form gel, adding an alcohol-water solution (with the alcohol concentration of 70-90%) containing an aminosilane coupling agent for aging, replacing the alcohol-water solution during aging, and drying in an autoclave after aging is finished.

The vacuum pumping is the condition that the vacuum degree of the vacuum device is less than or equal to 200Pa, preferably less than or equal to 100 Pa; aging for 2-4 days; the aqueous replacement alcohol solution is replaced 2 to 4 times, at least 60% per replacement, preferably at least 70% per replacement; the autoclave drying is carried out under the conditions of 5-7MPa, 220-250 ℃. The aminosilane coupling agent is at least one of KH-540, KH-550 and KH-792, and the concentration of the aminosilane coupling agent in the alcohol aqueous solution is 3-5 wt%. The function of adding a small amount of aminosilane coupling agent is to make xonotlite-SiO₂The aerogel composite material is more compact and firm, can not fall off and the like, and can keep the mechanical strength of the material for a long time.

Further, SiO₂The preparation of gel precursors is well known in the art and is obtained by reacting a silicate (e.g., methyl orthosilicate, ethyl orthosilicate) with water in an alcoholic solvent (e.g., methanol, ethanol) in the presence of a catalyst. The mass ratio of silicate ester, water, alcohol solvent and catalyst is 1: 2-3.5: 8-15: 0.02-0.05; the catalyst is selected from the group consisting of an acid or a base,the acid is selected from hydrochloric acid and sulfuric acid; the alkali is selected from sodium hydroxide or potassium hydroxide.

In particular, SiO₂Dispersing silicate ester in alcohol solvent, preheating to 30-50 deg.C, adding catalyst and 25-40% water, stirring for 2-4 hr, adding residual water, stirring for 1-2 hr, and concentrating under reduced pressure to solid content of 10-15% to obtain SiO₂And (3) gelling the precursor solution.

Further, the boron fiber is a tungsten core boron fiber with the diameter of 70-140 μm and the length of 1-3 mm; the epoxy resin is bisphenol A epoxy resin, the epoxy value equivalent weight is 0.32-0.53, and the epoxy resin comprises at least one of E51, E44, E42, E39, E31 and E20; the polyisocyanurate is at least one selected from toluene diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate.

Further, the zirconate coupling agent modified boron fiber is obtained by soaking the cleaned boron fiber with acid anhydride, taking out and cleaning the boron fiber, soaking the boron fiber in alcoholic solution of the zirconate coupling agent at 50-60 ℃, washing and drying the boron fiber; preferably, the washing is washing with absolute ethyl alcohol, the acid anhydride is at least one of acetic anhydride, propionic anhydride and isobutyric anhydride, and the soaking time is 1-2 h; the zirconium titanate/alcohol composite material is soaked in an alcoholic solution of a zirconate coupling agent, a solvent is absolute ethyl alcohol, the mass concentration is 30-40%, and the soaking time is 5-8 h. The inventors have unexpectedly found that the mechanical strength of the resulting fire-proof plate is improved and the radiation-proof performance is improved to some extent by modifying the boron fiber according to the above-mentioned method. The boron fiber modified by the zirconate coupling agent is dispersed in the fireproof plate more uniformly and forms a certain cross-linking structure, so that the mechanical strength of the fireproof plate is improved; the reason why the radiation protection performance is also to a certain extent is not clear at present. The inventors have found that if boron fibers are not treated with an acid anhydride, the boron fibers are modified to a lesser degree by the zirconate coupling agent and the modification is not effectively accomplished. But the dipping time of the acid anhydride is not easy to be too long, otherwise, the material strength is adversely affected.

The flame retardant is calcium borate, magnesium hydroxide and an organic phosphorus flame retardant according to the mass ratio of 3-5: 3-5: 6-8; the organophosphorus flame retardant is at least one of aluminum diethylphosphinate, aluminum dipropylphosphinate and diethyl ethylphosphonate. The flame retardant does not use antimony trioxide or halogen-containing flame retardants, and is truly green and environment-friendly.

The adhesive is polyvinyl acetate latex with solid content of 30-50%.

The fireproof plate is prepared by a preparation method comprising the following steps:

mixing xonotlite-SiO₂Mixing an aerogel composite material, borax and a flame retardant, grinding the mixture into mixed powder, mixing the mixed powder with a dispersing agent (water and polyvinyl alcohol in a solution of 10-20: 1) according to a ratio of 1: 2-3.4, uniformly stirring to prepare slurry, adding a zirconate coupling agent modified boron fiber, epoxy resin and an adhesive, continuously stirring for 1-2 hours, adding polyisocyanate into the obtained slurry, uniformly stirring, injecting into a mold with a filter screen, pressurizing to remove moisture, keeping pressure, forming, and drying to obtain the fireproof plate.

In the method for producing the fire retardant panel, the grinding manner is not particularly limited as long as the mixed material is ground to a particle size of 0.5 to 1mm, for example, by ball milling. The pressure and the dwell time for the pressurization are not particularly limited as long as the water is sufficiently discharged to form a stable shape, and in one embodiment of the present invention, the pressure for the pressurization is 3 to 5MPa and the dwell time is 2 to 4 hours. The drying is carried out in a drying kiln at the temperature of 140 ℃ and 180 ℃.

The use of xonotlite and SiO in the fire protection plate according to the invention₂The aerogel composite material greatly reduces the density of the material while ensuring the strength, so that the door leaf of the door has lighter weight and is convenient to open and close; the fireproof plate also comprises a boron-containing substance, borax and boron fibers which have certain radiation resistance, so that the fireproof plate also has certain radiation resistance, and can be used together with the radiation-proof plate to block rays harmful to human bodies to the maximum extent. Particularly, after the boron fiber is modified by the zirconate coupling agent, the mechanical strength of the fireproof fiber can be obviously improved, and the radiation resistance is also improved to a certain degree.

Further, the sulfur-containing resin is at least one of polysulfone resin, polyethersulfone resin and polyphenylene sulfide, preferably polyethersulfone.

Further, the radiation-proof filler is prepared from a barium-containing substance and a metal oxide according to a mass ratio of 3-5: 1-1.4; the grain diameter of the radiation-proof filler is 0.5-1 μm; further, the main component of the barium-containing substance is barium sulfate, such as barite; the metal oxide is at least one of tungsten oxide, iron oxide, lead oxide, cadmium oxide, rubidium oxide and tantalum oxide, and is preferably a mixture of tungsten oxide and lead oxide according to the mass ratio of 1-2: 1-2.

The cement and the water reducing agent are not particularly limited. In the concrete embodiment of the invention, the cement is Portland cement with the strength of above 42.5; the water reducing agent is a polycarboxylic acid water reducing agent.

The radiation-proof plate is prepared by the preparation method comprising the following steps:

and (3) placing the extruded and granulated sulfur-containing resin, the radiation-proof filler, the cement, the water and the water reducing agent in a stirrer, uniformly stirring, pouring in a mold, compacting, curing under natural conditions, and finally spraying a polyurethane foam material to obtain the radiation-proof plate.

The preparation method of the light fireproof radiation-proof composite material comprises the following steps: the fireproof plates and the radiation protection plates are compounded into a functional layer by waterproof glue, if a plurality of fireproof plates and radiation protection plates exist, the fireproof plates and the radiation protection plates are alternately superposed and compounded, after foam polyurethane is sprayed on two surfaces of the functional layer, the two surfaces are clamped by two lead alloy plates, and after the two surfaces are cured and molded, the light fireproof radiation protection composite material is obtained.

The invention also provides a fireproof radiation-proof vertical hinged door using the light fireproof radiation-proof composite material as a door leaf material, which comprises a door frame, a door leaf and a buffering door closer, wherein the door frame is arranged at the periphery of a door opening, and the outer side of the side edge of the door leaf is movably connected with the door frame through a hinge, so that the door leaf can be opened and closed in a rotating manner; the top of the door leaf is connected with the top beam of the door frame through a buffering door closer to control the opening and closing of the door leaf, and the door leaf is made of the light fireproof radiation-proof composite material.

Optionally, the door leaves are single-leaf doors or double-leaf doors, when the door leaves are double-leaf doors, a rib is arranged on the outer side of one door leaf, the rib is arranged on a side close to the other door leaf and extends towards the other door leaf, and the rib is used for blocking the other door leaf from rotating outwards when the door leaf is closed, so that the door leaf is kept closed well.

Optionally, the door frame is fixedly connected with a wall of the door opening through an expansion bolt; the door frame is provided with a groove corresponding to the inner side of the side edge of the door leaf, a first limiting rubber pad is arranged in the groove, and the top of the first limiting rubber pad protrudes out of the groove and is used for contacting with the inner side of the side edge of the door leaf when the door is closed so as to prevent the door leaf from impacting the door frame.

Optionally, the bottom ground of the fireproof door is provided with a limiting block, the limiting block corresponds to the inner side of the side edge of the door leaf where the hinge is not installed, a second limiting rubber pad is arranged inside the limiting block, the top of the second limiting rubber pad protrudes out of the limiting block and is used for contacting with the inner side of the side edge of the door leaf when the door is closed, and the first limiting rubber pad is used for assisting in fixing the position of the door leaf.

Drawings

FIG. 1 is a fireproof and radiation-proof vertical hinged door;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic diagram of a door leaf structure in application example 1;

fig. 4 is a schematic diagram of a door leaf structure in application example 2.

In the attached figure, 1-a door frame, 2-a door leaf, 3-a buffering door closer, 4-a hinge, 5-a flange, 6-an expansion bolt, 7-a first limiting rubber pad, 8-a limiting block, 9-a second limiting rubber pad, 10-a lead alloy plate, 11-a foamed polyurethane layer, 12-a fireproof plate and 13-a radiation-proof plate.

Detailed Description

Unless otherwise specified, the starting materials and reagents used in the examples of the present invention are commercially available.

Wherein the polyethersulfone is purchased from basf, model E2010G 4; polysulfone was purchased from basf, model S2010G 2; the cement is purchased from conch cement with the strength of 42.5 PO; the polycarboxylate superplasticizer is purchased from the MQW technology, and has the water reduction rate of 27 percent; tungsten core boron fibers were purchased from Shandong Yijing New materials priority, about 100 μm in diameter and 1.5-1.8mm in length.

Preparation example a preparation of a fire protection plate

Preparation example a1

1) Cleaning and drying boron fibers by using absolute ethyl alcohol, soaking the boron fibers in acetic anhydride for 1h, taking out the boron fibers, cleaning the boron fibers by using the absolute ethyl alcohol, soaking the boron fibers in an ethanol dispersion liquid of a zirconate coupling agent with the mass concentration of 35%, heating the boron fibers to 50 ℃ under the reflux stirring condition, soaking the boron fibers for 6h, taking out the boron fibers, cleaning and drying the boron fibers by using the absolute ethyl alcohol to obtain the zirconate coupling agent modified boron fibers;

2) dissolving 10 parts of tetraethoxysilane in 100 parts of ethanol, preheating to 45 ℃, adding 10 parts of water and 0.3 part of sodium hydroxide, stirring for hydrolysis reaction for 3 hours, adding 15 parts of water, continuing stirring for reaction for 2 hours, and concentrating until the solid content is 13.6 percent to obtain SiO₂Gel precursor solution;

3) placing xonotlite in a vacuum kettle, vacuumizing to 70Pa, and sucking the SiO obtained in the step 2)₂Gel precursor solution, imbibition amount of SiO₂Fully immersing the xonotlite in the gel precursor, standing for 24h to form gel, adding an ethanol aqueous solution containing a KH-550 silane coupling agent, wherein the mass concentration of the ethanol is 88wt%, the concentration of the KH-550 is 5wt%, aging, the presbyopia time is 3 days, replacing the 88wt% ethanol aqueous solution every day by 70%, and after the aging is finished, drying in an autoclave at 230 ℃ under 5.8Mpa to obtain xonotlite-SiO₂An aerogel composite;

4) 55 portions of xonotlite-SiO₂The aerogel composite material is prepared by mixing 35 parts of borax and 16 parts of a flame retardant (a mixture of calcium borate, magnesium hydroxide and aluminum dipropyl hypophosphite in a mass ratio of 1:1: 2), grinding the mixture by a ball mill to obtain a mixed powder with the particle size of about 0.5mm, and mixing the mixed powder with a dispersing agent (a mixed solution of water and polyvinyl alcohol in a mass ratio of 15: 1) according to a ratio of 1: 2.6, stirring uniformly at the rotating speed of 50r/min to prepare slurry, adding 9 parts of E44 epoxy resin, 18 parts of zirconate coupling agent modified boron fiber prepared in the step 1) and 71 parts of polyvinyl acetate latex with the solid content of 35%, continuously stirring for 2 hours, adding 4.2 parts of toluene diisocyanate into the obtained slurry, stirring uniformly, injecting into a mold, pressurizing to 2MPa to remove water, keeping the pressure, molding, and placing the slurry for standingDrying in a drying kiln at 150 ℃ to obtain the fireproof plate.

Preparation a2

Other conditions and operations were the same as in preparation a1, except that xonotlite- -SiO₂The aerogel composite material comprises 50 parts of aerogel composite material, 40 parts of borax, 13 parts of zirconate coupling agent modified boron fiber, 7 parts of E51, 15 parts of flame retardant and 62 parts of polyvinyl acetate latex.

Preparation a3

Other conditions and operations were the same as in preparation a1, except that xonotlite- -SiO₂65 parts of aerogel composite material, 34 parts of borax, 18 parts of zirconate coupling agent modified boron fiber, 10 parts of E51, 16 parts of flame retardant and 68 parts of polyvinyl acetate latex.

Preparation a4

The other conditions and operations are the same as those of preparation example a1, except that in step 1), the boron fiber is cleaned and dried by absolute ethyl alcohol, then is soaked in ethyl alcohol dispersion of zirconate coupling agent with the mass concentration of 35%, is heated to 50 ℃ under the condition of reflux stirring, is soaked for 6 hours, is taken out, and is cleaned and dried by absolute ethyl alcohol. I.e. the boron fibres were not treated with acetic anhydride.

Preparation a5

The other conditions and operations were the same as in preparation example a1 except that step 1) was not present and the zirconate coupling agent modified boron fiber in step 4) was replaced with a conventional unmodified boron fiber.

Preparation a6

The other conditions and operations were the same as in preparation example a1 except that the boron fiber modified with the zirconate coupling agent was replaced with a glass fiber.

Test example a

The fire protection plates obtained in the above preparation examples a1-a6 were tested and the results are shown in table 1 below.

The normal-temperature breaking strength is carried out according to GB/T3001-2017;

the refractory temperature is carried out with reference to GB/T7322-2017.

Lead equivalent test: the fire-proof plate and the pure lead standard sheet are compared, and the thickness of the pure lead standard sheet is used as the lead equivalent under the condition of reaching the same X-ray transmittance.

As can be seen from the data in Table 1, the fire protection plate according to the invention is produced by mixing xonotlite and SiO₂The aerogel is compounded for use, so that the density is reduced, and the breaking strength is improved; the boron fiber modified by the zirconate coupling agent can improve the mechanical strength, the fire-proof grade and the radiation-proof performance of the obtained fireproof board at the same time.

Preparation example b preparation of radiation protective sheet

Preparation b1

70 parts of extruded and granulated polyether sulfone, 60 parts of radiation-proof filler (48 parts of barite, 6 parts of tungsten oxide and 6 parts of lead oxide), 150 parts of conch PO42.5 cement, 70 parts of water and 1.5 parts of polycarboxylic acid water reducer are placed in a stirrer, uniformly stirred, poured in a mould with a specified thickness and compacted, and naturally maintained for 28 days to obtain the radiation-proof plate.

Preparation b2

The other conditions and operations were the same as in example b1, except that 70 parts of polyethersulfone was replaced with 70 parts of polysulfone.

Preparation b3

The other conditions and operation were the same as in example b1 except that 60 parts of the radiation protective filler was 30 parts of barite, 15 parts of tungsten oxide and 15 parts of lead oxide.

Preparation b4

The other conditions and operation were the same as in example b1 except that 60 parts of the radiation protective filler was 48 parts of barite and 12 parts of tungsten oxide.

Preparation b5

The other conditions and operation were the same as in example b1 except that 60 parts of the radiation protective filler was 48 parts of barite and 12 parts of lead oxide.

Test example b the radiation protective sheets obtained in preparation examples b1-b5 above were tested and the results are shown in table 2 below.

Lead equivalent test: the radiation protection plate and the pure lead standard sheet are compared, and the thickness of the pure lead standard sheet is taken as the lead equivalent under the condition that the transmittance of the same X-ray is achieved.

As can be seen from the data in Table 2, the light radiation-proof plate prepared by the invention and the plate with the best radiation-proof performance can be obtained by screening the radiation-proof filler. The data in table 2 show that the radiation-proof filler barite, tungsten oxide and lead oxide of the invention can play a synergistic role in a specific proportioning range.

According to comprehensive properties, the light fireproof radiation-proof composite material provided by the invention is prepared by selecting the preparation example a1 as a fireproof plate and selecting the preparation example b1 as a radiation-proof plate. The composite effect is optimal in the aspects of density, mechanical property, fireproof performance and radiation-proof performance.

Application example 1

The application example provides a fireproof radiation-proof vertical hinged door, as shown in fig. 1, which comprises a door frame 1, a door leaf 2 and a buffering door closer 3, wherein the door frame 1 is arranged on the periphery of a door opening, and the side edge of the door leaf 2 is movably connected with the door frame 1 through a hinge 4, so that the door leaf 2 can be opened and closed in a rotating manner; the top of the door leaf 2 is connected with the top beam of the door frame 1 through a buffer door closer 3 to control the opening and closing of the door leaf 2.

The door leaf is made of a multi-layer light fireproof radiation-proof composite material, which comprises a 2mm lead alloy plate 10, a 20mm foamed polyurethane layer 11, a fireproof plate 12 obtained in a 70mm preparation example a1, a radiation-proof plate 13 obtained in a 30mm preparation example b1, a 20mm foamed polyurethane layer 11 and a 2mm lead alloy plate 10 in sequence. The structure is shown in fig. 3. Through tests, the linear attenuation coefficient of the multilayer composite material of the door leaf in the application example 1 under gamma rays (more than or equal to 2.0MeV) is 0.52cm^-1。

Application example 2

The fireproof and radiation-proof vertical hinged door has the same structure as application example 1, and is characterized in that the door leaf is made of a multi-layer light fireproof and radiation-proof composite material which is a 2mm lead alloy plate 10, a 20mm foamed polyurethane layer 11 and the material obtained in preparation example a1 of 35mm in sequenceFire protection plate 12, radiation protection plate 13 from preparation b1 of 15mm, fire protection plate 12 from preparation a1 of 35mm, radiation protection plate 13 from preparation b1 of 15mm, foamed polyurethane layer 11 of 20mm, lead alloy plate 10 of 2 mm. The structure is shown in fig. 4. Through tests, the linear attenuation coefficient of the multilayer composite material of the door leaf in the application example 1 under gamma rays (not less than 2.0MeV) is 0.55cm^-1。

Example 3

This application example provides a fire prevention radiation protection vertical hinged door, as shown in fig. 1-fig. 2, with application example 1's fire door structure the same, the difference lies in, the door leaf is the double door, and the outside of one door leaf 2 is equipped with flange 5, flange 5 establishes in the side that is close to another door leaf, and extends to another door leaf, flange 5 is used for when door leaf 2 closes, stops another door leaf and outwards rotates, keeps the door leaf well to close. The door frame 1 is fixedly connected with the wall body of the door opening through the expansion bolts 6.

The door frame 1 is provided with a groove corresponding to the inner side of the side edge of the door leaf 2, a first limiting rubber pad 7 is arranged in the groove, and the top of the first limiting rubber pad 7 protrudes out of the groove and is used for contacting with the inner side of the side edge of the door leaf 2 when the door is closed, so that the door leaf 2 is prevented from impacting the door frame 1.

Prevent that fire door's bottom ground sets up stopper 8, and stopper 8 corresponds the inboard of the side of the door leaf not installed the hinge, and stopper 8 is inside to be equipped with the spacing rubber pad of second 9, and the top protrusion stopper 8 of the spacing rubber pad of second 9 for when closing the door with door leaf side inboard contact, supplementary first spacing rubber pad fixes the position of door leaf 2.

Claims

1. A fireproof radiation-proof vertical hinged door comprises a door frame, a door leaf and a buffering door closer, wherein the door frame is arranged on the periphery of a door opening, and the outer side of the side edge of the door leaf is movably connected with the door frame through a hinge, so that the door leaf can be opened and closed in a rotating mode; the top of the door leaf is connected with a top beam of a door frame through a buffering door closer to control the opening and closing of the door leaf, and the door leaf is made of a light fireproof radiation-proof composite material; the light fireproof radiation-proof composite material is of a multilayer composite structure and sequentially comprises a lead alloy plate, foamed polyurethane, a functional layer, foamed polyurethane and a lead alloy plate; the functional layer comprises a fireproof plate and a radiation-proof plate;

2. The fire-proof radiation-proof vertical hinged door of claim 1, wherein the functional layer comprises at least one layer of fire-proof plate and at least one layer of radiation-proof plate; when the number of the fireproof plates and/or the radiation protection plates is more than one layer, the fireproof plates and the radiation protection plates are alternately arranged.

3. The fireproof radiation-proof vertical hinged door of claim 1, wherein the lead alloy plate is 1-2mm thick, the foamed polyurethane is 20-30mm thick, the total thickness of the fireproof plate is 50-70mm, and the total thickness of the radiation-proof plate is 30-40 mm.

4. The fire-proof radiation-proof vertical hinged door of claim 1, wherein the xonotlite-SiO₂The aerogel composite material is obtained by a preparation method comprising the following steps: placing xonotlite in a vacuum device, vacuumizing, and adding SiO₂Sucking the gel precursor solution into a vacuum device, and immersing xonotlite, xonotlite and SiO₂Compounding gel precursors, standing for 20-30h to form gel, adding an alcohol-water solution containing an aminosilane coupling agent for aging, replacing the alcohol-water solution during aging, and drying in a high-pressure kettle after aging is finished to obtain the gel; the aminosilane coupling agent is at least one of KH-540, KH-550 and KH-792, and the concentration of the aminosilane coupling agent in the alcohol aqueous solution is 3-5 wt%.

5. The fireproof radiation-proof vertical hinged door according to claim 1, characterized in that in the raw material of the fireproof plate, the boron fiber is tungsten core boron fiber, the diameter is 70-140 μm, and the length is 1-3 mm; the epoxy resin is bisphenol A epoxy resin, has an epoxy value equivalent of 0.32-0.53, and comprises at least one of E51, E44, E42, E39, E31 and E20; the polyisocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate; the flame retardant is calcium borate, magnesium hydroxide and an organic phosphorus flame retardant according to the mass ratio of 3-5: 3-5: 6-8; the organophosphorus flame retardant is at least one of aluminum diethylphosphinate, aluminum dipropylphosphinate and diethyl ethylphosphonate; the adhesive is polyvinyl acetate latex with solid content of 30-50%;

in the raw material of the radiation-proof plate, the sulfur-containing resin is at least one of polysulfone resin, polyether sulfone resin and polyphenylene sulfide; the radiation-proof filler is prepared from a barium-containing substance and a metal oxide according to a mass ratio of 3-5: 1-1.4; the particle size of the radiation-proof filler is 0.5-1 μm.

6. The fireproof radiation-proof vertical hinged door according to claim 1, wherein the zirconate coupling agent modified boron fiber is obtained by firstly soaking the cleaned boron fiber with acid anhydride, taking out and cleaning the boron fiber, soaking the boron fiber in alcoholic solution of zirconate coupling agent at 50-60 ℃, washing and drying the boron fiber.

7. The fireproof radiation-proof vertical hinged door of claim 5, wherein the barium-containing substance is barite; the metal oxide is a mixture of tungsten oxide and lead oxide according to a mass ratio of 1-2: 1-2.

8. The fireproof radiation-proof vertical hinged door of any one of claims 1 to 7, wherein the preparation method of the lightweight fireproof radiation-proof composite material comprises the following steps: compounding a fireproof plate and a radiation-proof plate into a functional layer by using waterproof glue, if a plurality of fireproof plates and radiation-proof plates exist, alternately superposing and compounding the fireproof plates and the radiation-proof plates, spraying foamed polyurethane on two surfaces of the functional layer, clamping by using two lead alloy plates, and curing and molding to obtain a light fireproof radiation-proof composite material;

the fireproof plate is prepared by a preparation method comprising the following steps: mixing xonotlite-SiO₂The aerogel composite material, the borax and the flame retardant are mixed and ground into mixed powder, and the mixed powder and the dispersing agent are mixed according to the proportion of 1: 2-3.4, uniformly stirring to prepare slurry, adding a zirconate coupling agent modified boron fiber, epoxy resin and an adhesive, continuously stirring for 1-2 hours, adding polyisocyanate into the obtained slurry, uniformly stirring, injecting the slurry into a mold with a filter screen, pressurizing to remove moisture, and drying after pressure maintaining and forming to obtain the fireproof plate;

the radiation-proof plate is prepared by the preparation method comprising the following steps: and (3) placing the extruded and granulated sulfur-containing resin, the radiation-proof filler, the cement, the water and the water reducing agent into a stirrer, uniformly stirring, pouring into a mold, compacting, and maintaining under natural conditions to obtain the radiation-proof plate.