阅读说明：本技术 一种耐用型防火聚氨酯泡沫材料的制备方法 (Preparation method of durable fireproof polyurethane foam material ) 是由 陈建忠 向巧云 向彬 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种耐用型防火聚氨酯泡沫材料的制备方法,该耐用型防火聚氨酯泡沫材料由以下重量份的原料制备而成,季戊四醇聚醚30-40份、甘油聚醚20-30份、异氰酸酯20-30份、聚碳酸酯二醇10-15份、聚乙烯8-14份、催化剂5-11份、发泡剂10-15份、阻燃剂10-15份和水7-13份,使用搅拌桶使所述重量份的原料搅拌、混合均匀,得到耐用型防火聚氨酯泡沫材料；所述搅拌桶包括第一搅拌机构、第二搅拌机构和辅助搅拌机构,通过多重搅拌机构的设置使该搅拌桶具有操作方便、工作环境安全、搅拌效果好等优点,且通过在原材料中添加适量的阻燃剂,使聚氨酯泡沫不仅具有弹性好、重量轻、快速压敏固定、使用方便、弯曲自如、体积超薄等优点,还有具有防火阻燃功能,有利用人们的生活生产。(The invention discloses a preparation method of a durable fireproof polyurethane foam material, which is prepared from the following raw materials, by weight, 30-40 parts of pentaerythritol polyether, 20-30 parts of glycerol polyether, 20-30 parts of isocyanate, 10-15 parts of polycarbonate diol, 8-14 parts of polyethylene, 5-11 parts of a catalyst, 10-15 parts of a foaming agent, 10-15 parts of a flame retardant and 7-13 parts of water, wherein the raw materials are stirred and uniformly mixed by using a stirring barrel to obtain the durable fireproof polyurethane foam material; the agitator includes first rabbling mechanism, second rabbling mechanism and supplementary rabbling mechanism, makes this agitator have advantages such as convenient operation, operational environment safety, stirring effect are good through setting up of multiple rabbling mechanism, and through adding appropriate amount of fire retardant in raw and other materials, makes polyurethane foam not only have elasticity good, light in weight, quick pressure-sensitive fixed, convenient to use, crooked freely, advantages such as volume ultra-thin, has fire prevention fire-retardant function in addition, has the life production that utilizes people.)

1. A preparation method of a durable fireproof polyurethane foam material is characterized by comprising the following steps:

preparing raw materials with the following parts by weight, namely 30-40 parts of pentaerythritol polyether, 20-30 parts of glycerol polyether, 20-30 parts of isocyanate, 10-15 parts of polycarbonate diol, 8-14 parts of polyethylene, 5-11 parts of a catalyst, 10-15 parts of a foaming agent, 10-15 parts of a flame retardant and 7-13 parts of water;

step two, all the materials in the step one are placed in a heat preservation cabinet for 4 hours, and the temperature is set to be 16 ℃;

step three, taking out all the materials, accurately weighing the materials for later use according to the requirements in the step one, and controlling the weighing work of all the materials to be finished within 2.0min before foaming and charging;

pouring pentaerythritol polyether and glycerol polyether into a stirring barrel, slowly stirring at the stirring speed of 400 r/min, sequentially adding polycarbonate diol, polyethylene, a catalyst, a foaming agent, a flame retardant and water while stirring, controlling the feeding process of all the materials to be finished within 1.5min, and stopping stirring after the materials are uniformly mixed;

step five, quickly pouring isocyanate into a stirring barrel, quickly starting a stirring motor, stirring at the speed of 1000 revolutions per minute, mixing and stirring at a high speed for 10s, pouring the mixture into a model, starting foaming, and drying and standing for 3.0min in the model after foaming is finished to obtain a foamed mixture;

and step six, drying and curing the foamed mixture for 6 hours to obtain the durable fireproof polyurethane foam material.

2. The method of claim 1, wherein the isocyanate in step one is one or a mixture of at least two of toluene diisocyanate, 1-6 hexamethylene diisocyanate and xylylene diisocyanate.

3. The method of claim 1, wherein the catalyst comprises a 2:1 mass ratio of a tin catalyst and an amine catalyst, wherein the tin catalyst is one or more of dibutyltin dilaurate, monobutyltin oxide, dioctyltin dilaurate, and tributyltin hydride, and wherein the amine catalyst is triethylenediamine or bis (2-dimethylaminoethyl) ether.

4. The method of claim 1 wherein the blowing agent is methylene chloride or fluorotrichloromethane.

5. The method of claim 1, wherein the flame retardant is tricresyl phosphate.

6. The method of claim 1, wherein the mixing step in the fourth step and the mixing step in the fifth step are performed by a mixing tank.

7. The preparation method of the durable fireproof polyurethane foam material as claimed in claim 6, wherein the stirring barrel comprises a barrel body (1), the barrel body (1) is a vertically placed rectangular cavity, the four corners of the lower surface of the barrel body (1) are fixedly connected with supporting legs (11), the bottom of each supporting leg (11) is fixedly connected with a non-slip mat (12), the upper surface of the barrel body (1) is provided with a feeding groove (13), the feeding groove (13) comprises a feeding hopper and a conveying chute, the bottom end of the conveying chute penetrates through the upper cover of the barrel body (1) to be communicated with the inside of the barrel body (1), the left side of the feeding groove (13) is provided with a motor support frame (18), the upper end of the motor support frame (18) is fixedly provided with a stirring motor (2), two side plates of the motor support frame (18) are welded on the upper surface of the barrel body (1), the left side of the motor support, the belt pulley supporting frame (17) is welded on the upper surface of the barrel body (1) through two supporting legs, a water inlet pipe (15) is arranged at the upper end of the right side wall of the barrel body (1), a liquid level meter (16) is arranged above the water inlet pipe (15), and a discharge hole (14) is formed in the bottom end of the right side wall of the barrel body (1);

the upper top plate of the motor supporting frame (18) is provided with a round hole, the output shaft of the stirring motor (2) penetrates through the round hole on the supporting frame (18) and is fixedly connected with a rotating shaft (3), the upper end of the rotating shaft (3) is sleeved with a first belt pulley (21), the first belt pulley (21) is positioned inside the motor supporting frame (18), the first belt pulley (21) is fixed on the upper surface of the barrel body (1) by two symmetrically arranged supporting rods (22), the first belt pulley (21) and the rotating shaft (3) can do equidirectional rotary motion under the driving action of the stirring motor (2), a second belt pulley (23) is arranged above the belt pulley supporting frame (17), the first belt pulley (21) and the second belt pulley (23) are rotationally connected through a belt (24), a first connecting rod (25) is arranged below the second belt pulley (23), the upper end of the first connecting rod (25) is fixedly connected with the second belt pulley (23) through a fixing part, a first bevel gear (26) is fixedly connected to the lower end of the first connecting rod (25), the first bevel gear (26) can rotate in the same direction along with the second belt pulley (23), a second bevel gear (27) is arranged below the first bevel gear (26), the first bevel gear (26) is meshed with the second bevel gear (27), and an auxiliary stirring mechanism (4) is arranged on the right side of the second bevel gear (27);

the auxiliary stirring mechanism (4) comprises a second connecting rod (41), one end of the second connecting rod (41) penetrates through the left side wall of the barrel body (1) and is fixedly connected with the second bevel gear (27), the other end of the second connecting rod (41) is fixedly connected with a circular stirring blade (43), a spiral stirring blade (42) is fixedly mounted on the second connecting rod (41), and the spiral stirring blade (42) is positioned on the left side of the circular stirring blade (43);

the stirring device is characterized in that a first stirring mechanism (31) and a second stirring mechanism (32) are installed on the rotating shaft (3), the second stirring mechanism (32) is located below the first stirring mechanism (31), the second stirring mechanism (32) is fixedly connected with the bottom end of the rotating shaft (3), the first stirring mechanism (31) comprises a sleeve (311), the sleeve (311) is fixedly sleeved at the upper end of the rotating shaft (3), four first stirring blades (312) with the same size are fixedly welded on the periphery of the outer wall of the sleeve (311), an included angle between every two adjacent first stirring blades (312) is 90 degrees, each first stirring blade (312) is a steel plate with the upper end and the lower end being in a right trapezoid shape and the middle being in a rectangular shape, a plurality of through holes (313) are formed in the inner parts of the first stirring blades (312), the second stirring mechanism (32) comprises a fixed sleeve (321), the bottom end of the fixed sleeve (321) is welded at the central position of the upper surface of the rotating disc (, and the inside screw thread that is equipped with of fixed sleeve (321), bottom threaded connection of fixed sleeve (321) and pivot (3), the edge fixed mounting in the outside of rotary disk (322) has second stirring vane (323), second stirring vane (323) evenly distributed is on the outside edge of rotary disk (322), second stirring vane (323) are the blade that has the curvature, and the curvature orientation is the same when second stirring vane (323) is installed.

8. The method for preparing a durable fireproof polyurethane foam material as claimed in claim 7, wherein the upper end of the feeding groove (13) is hinged with a sealing cover, the outer end of the water inlet pipe (15) is provided with a sealing cover, and the discharge hole (14) is provided with a control valve.

9. The method for preparing a durable fire-retardant polyurethane foam material as claimed in claim 7, wherein a frequency converter is externally connected to the stirring motor (2).

Technical Field

The invention belongs to the technical field of foam materials, and particularly relates to a preparation method of a durable fireproof polyurethane foam material.

Background

In industrial and civil buildings, due to the arrangement of pipelines inside the buildings and the requirement of building construction, a plurality of pipeline through holes are usually formed on a fire-proof partition of the buildings, and reserved empty openings are prepared for electric appliances, and when a fire disaster occurs, the empty holes can become a diffusion channel of fire and toxic smoke, so that the damage of the fire disaster is enlarged, and the fire disaster extinguishing difficulty is increased. Although the traditional polyurethane organic plugging material has the advantages of light weight, low heat conductivity coefficient, good heat resistance and the like, the traditional polyurethane organic plugging material generally has the defect that heat preservation and fire prevention can not be considered at the same time, releases a large amount of heat and generates a large amount of toxic smoke during combustion, so that the fire spreading can be accelerated, and trapped persons and rescuers are easy to injure. The traditional inorganic materials such as rock mineral wool, glass wool and the like have the advantages of acid and alkali resistance, corrosion resistance, high stability, aging resistance and the like, but show the defects of brittle foam, easy pulverization, low strength and the like, and also have the defects of dust, fine fiber and the like, so that the traditional inorganic materials not only pollute air, but also are easy to breed bacteria, have become hidden dangers harmful to the health of people, have limited heat insulation performance, and have limited application range.

Therefore, under the current situation, the problem to be solved is to find a foam material which has excellent elasticity and flexibility, strong filling capability, high temperature resistance, aging resistance and fireproof and flame-retardant functions.

Disclosure of Invention

The invention aims to provide a preparation method of a durable fireproof polyurethane foam material.

The technical problems to be solved by the invention are as follows:

in the prior art, the foam material has poor elasticity and low flexibility, is not high temperature resistant and ageing resistant, can be used as a filling and plugging material in civil buildings, but has no fireproof function, is extremely easy to burn, generates a large amount of waste gas and waste smoke after burning, and is not beneficial to the safe life and production of people.

The purpose of the invention can be realized by the following technical scheme:

a preparation method of a durable fireproof polyurethane foam material comprises the following steps:

preparing raw materials with the following parts by weight, namely 30-40 parts of pentaerythritol polyether, 20-30 parts of glycerol polyether, 20-30 parts of isocyanate, 10-15 parts of polycarbonate diol, 8-14 parts of polyethylene, 5-11 parts of a catalyst, 10-15 parts of a foaming agent, 10-15 parts of a flame retardant and 7-13 parts of water; the catalyst comprises a tin catalyst and an amine catalyst in a mass ratio of 2:1, wherein the tin catalyst is dibutyltin dilaurate, the amine catalyst is triethylene diamine, the foaming agent is dichloromethane, and the flame retardant is tricresyl phosphate.

Step two, all the materials in the step one are placed in a heat preservation cabinet for 4 hours, and the temperature is set to be 16 ℃;

step three, taking out all the materials, accurately weighing the materials for later use according to the requirements in the step one, and controlling the weighing work of all the materials to be finished within 2.0min before foaming and charging;

pouring pentaerythritol polyether and glycerol polyether into a stirring barrel, slowly stirring at the stirring speed of 400 r/min, sequentially adding polycarbonate diol, polyethylene, a catalyst, a foaming agent, a flame retardant and water while stirring, controlling the feeding process of all the materials to be finished within 1.5min, and stopping stirring after the materials are uniformly mixed;

step five, quickly pouring isocyanate into a stirring barrel, quickly starting a stirring motor, stirring at the speed of 1000 revolutions per minute, mixing and stirring at a high speed for 10s, pouring the mixture into a model, starting foaming, and drying and standing for 3.0min in the model after foaming is finished to obtain a foamed mixture;

the stirring barrel comprises a barrel body, the barrel body is a vertically placed rectangular cavity body, supporting legs are fixedly connected to four corners of the lower surface of the barrel body, a non-slip mat is fixedly connected to the bottom of each supporting leg, a feeding groove is formed in the upper surface of the barrel body and comprises a feeding hopper and a conveying chute, the bottom end of the conveying chute penetrates through an upper cover of the barrel body to be communicated with the interior of the barrel body, a motor supporting frame is arranged on the left side of the feeding groove, a stirring motor is fixedly mounted at the upper end of the motor supporting frame, two side plates of the motor supporting frame are welded to the upper surface of the barrel body, a belt pulley supporting frame is arranged on the left side of the motor supporting frame and welded to the upper surface of the barrel body through two supporting legs, a;

the top plate of the motor supporting frame is provided with a round hole, the output shaft of the stirring motor passes through the round hole on the supporting frame and is fixedly connected with a rotating shaft, the upper end of the rotating shaft is sleeved with a first belt pulley, the first belt pulley is positioned in the motor supporting frame, the first belt pulley is fixed on the upper surface of the barrel body by two symmetrically arranged supporting rods, the first belt pulley and the rotating shaft can do equidirectional rotary motion under the driving action of the stirring motor, a second belt pulley is arranged above the belt pulley supporting frame, the first belt pulley and the second belt pulley are rotationally connected through a belt, a first connecting rod is arranged below the second belt pulley, the upper end of the first connecting rod is fixedly connected with the second belt pulley through a fixing piece, the lower end of the first connecting rod is fixedly connected with a first bevel gear, the first bevel gear can do equidirectional rotary motion, the first bevel gear is meshed with the second bevel gear, and an auxiliary stirring mechanism is arranged on the right side of the second bevel gear;

the auxiliary stirring mechanism comprises a second connecting rod, one end of the second connecting rod penetrates through the left side wall of the barrel body to be fixedly connected with the second bevel gear, the other end of the second connecting rod is fixedly connected with a circular stirring blade, a spiral stirring blade is fixedly mounted on the second connecting rod and is positioned on the left side of the circular stirring blade, liquid in the barrel body generates local vortexes in the stirring process through the spiral stirring blade and the circular stirring blade, the vortexes are rapidly diffused to the periphery, more liquid is rolled into the vortexes, and therefore the circular reciprocating motion is achieved, and all components in the liquid are uniformly mixed;

the rotating shaft is provided with a first stirring mechanism and a second stirring mechanism, the second stirring mechanism is positioned below the first stirring mechanism and is fixedly connected with the bottom end of the rotating shaft, the first stirring mechanism comprises a sleeve, the sleeve is fixedly sleeved at the upper end of the rotating shaft, four first stirring blades with the same size are fixedly welded on the periphery of the outer wall of the sleeve, the included angle between every two adjacent first stirring blades is 90 degrees, each first stirring blade is a steel plate with right trapezoid upper and lower ends and rectangular middle, a plurality of through holes are formed in each first stirring blade, and the irregular shape and the design of the inner through holes of the first stirring blades are beneficial to more uniform mixing of liquid in the barrel body in the stirring process; the second stirring mechanism comprises a fixed sleeve, the bottom end of the fixed sleeve is welded at the central position of the upper surface of the rotating disc, threads are arranged in the fixed sleeve, the fixed sleeve is in threaded connection with the bottom end of the rotating shaft, second stirring blades are fixedly installed on the outer edge of the rotating disc and are uniformly distributed on the outer edge of the rotating disc, the second stirring blades are blades with curved radians, and the curved radians face the same direction when the second stirring blades are installed; through the arrangement of the first stirring mechanism and the second stirring mechanism, liquid in the barrel body generates vortex in the horizontal direction, all components are fused and diffused with each other, and the liquid in the barrel body is uniformly mixed to a greater extent;

the upper end of the feeding groove is hinged with a sealing cover, the outer end of the water inlet pipe is provided with the sealing cover, the discharge port is provided with a control valve, and the connecting ports communicated with the interior of the barrel body are sealed, so that the mixed liquid is prevented from discharging toxic and harmful gases and polluting the environment in the stirring process;

and the external part of the stirring motor is connected with a frequency converter for adjusting the rotation speed of the stirring motor.

The working method of the stirring barrel comprises the following steps:

the method comprises the following steps of putting raw materials to be stirred into a barrel body through a feeding groove, opening a water inlet pipe, adding water in required amount, switching on a power supply, controlling the rotation speed of a stirring motor through adjusting a frequency converter, driving a rotating shaft and a first belt pulley to rotate by the rotating stirring motor, driving a second belt pulley to rotate by the first belt pulley through a belt, driving a first bevel gear to rotate by the second belt pulley, driving a second bevel gear meshed with the first bevel gear to rotate by the first bevel gear, and driving an auxiliary stirring mechanism to rotate; the pivot drives first rabbling mechanism and second rabbling mechanism and rotates, through the setting of first rabbling mechanism, second rabbling mechanism and supplementary rabbling mechanism, makes the inside liquid of staving stirred the misce bene, and the liquid of stirred the misce bene passes through discharge gate discharge agitator.

And step six, drying and curing the foamed mixture for 6 hours to obtain the durable fireproof polyurethane foam material.

The invention has the beneficial effects that:

the polyurethane foam is a material foamed by plastic particles, is provided with a plurality of high molecular polymers with small foam holes, has a solid phase which is a polymer substrate, is filled with gas, has a series of characteristics of good elasticity, light weight, quick pressure-sensitive fixation, convenient use, free bending, ultrathin volume, reliable performance and the like, has the fireproof and flame-retardant functions by adding a proper amount of flame retardant, and can be produced by utilizing the life of people.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a mixing tank according to the present invention;

FIG. 2 is a schematic structural diagram of a first stirring mechanism;

FIG. 3 is a schematic structural view of a second stirring mechanism;

fig. 4 is a schematic structural view of the auxiliary stirring mechanism.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a barrel body; 11. supporting legs; 12. a non-slip mat; 13. a feeding groove; 14. a discharge port; 15. a water inlet pipe; 16. a liquid level meter; 17. a belt pulley support frame; 18. a motor support frame; 2. a stirring motor; 21. a first pulley; 22. a support bar; 23. a second pulley; 24. a belt; 25. a first connecting rod; 26. a first bevel gear; 27. a second bevel gear; 3. a rotating shaft; 31. a first stirring mechanism; 311. a sleeve; 312. a first stirring blade; 313. a through hole; 32. a second stirring mechanism; 321. fixing the sleeve; 322. rotating the disc; 323. a second stirring blade; 4. an auxiliary stirring mechanism; 41. a second connecting rod; 42. helical stirring blades, 43, circular stirring blades.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A preparation method of a durable fireproof polyurethane foam material comprises the following steps:

step one, preparing the following raw materials in parts by weight: 31 parts of pentaerythritol polyether, 23 parts of glycerol polyether, 22 parts of toluene diisocyanate, 12 parts of polycarbonate diol, 9 parts of polyethylene, 6 parts of catalyst, 10 parts of foaming agent, 9 parts of flame retardant and 8 parts of water, wherein the catalyst comprises a tin catalyst and an amine catalyst in a mass ratio of 2:1, the tin catalyst is dibutyltin dilaurate, the amine catalyst is triethylene diamine, the foaming agent is dichloromethane, and the flame retardant is tricresyl phosphate.

Step two, all the materials in the step one are placed in a heat preservation cabinet for 4 hours, and the temperature is set to be 16 ℃;

step three, taking out all the materials, accurately weighing the materials for later use according to the requirements in the step one, and controlling the weighing work of all the materials to be finished within 2.0min before foaming and charging;

pouring pentaerythritol polyether and glycerol polyether into a stirring barrel, slowly stirring at the stirring speed of 400 r/min, sequentially adding polycarbonate diol, polyethylene, a catalyst, a foaming agent, a flame retardant and water while stirring, controlling the feeding process of all the materials to be finished within 1.5min, and stopping stirring after the materials are uniformly mixed;

step five, quickly pouring isocyanate into a stirring barrel, quickly starting a stirring motor, stirring at the speed of 1000 revolutions per minute, mixing and stirring at a high speed for 10s, pouring the mixture into a model, starting foaming, and drying and standing for 3.0min in the model after foaming is finished to obtain a foamed mixture;

the stirring barrel comprises a barrel body 1, the barrel body 1 is a vertically-arranged rectangular cavity body, supporting legs 11 are fixedly connected at four corners of the lower surface of the barrel body 1, an anti-slip mat 12 is fixedly connected at the bottom of each supporting leg 11, a feeding groove 13 is arranged on the upper surface of the barrel body 1, the feeding groove 13 comprises a feeding hopper and a conveying chute, the bottom end of the conveying chute penetrates through the upper cover of the barrel body 1 to be communicated with the interior of the barrel body 1, a motor supporting frame 18 is arranged on the left side of the feeding groove 13, a stirring motor 2 is fixedly installed at the upper end of the motor supporting frame 18, two side plates of the motor supporting frame 18 are welded on the upper surface of the barrel body 1, a belt pulley supporting frame 17 is arranged on the left side of the motor supporting frame 18, the belt pulley supporting frame 17 is welded on the upper surface of the barrel body 1, a discharge hole 14 is formed at the bottom end of the side wall of the right side of the barrel body 1;

the top plate of the motor support frame 18 is provided with a round hole, the output shaft of the stirring motor 2 passes through the round hole on the support frame 18 and is fixedly connected with a rotating shaft 3, the upper end of the rotating shaft 3 is sleeved with a first belt pulley 21, the first belt pulley 21 is positioned inside the motor support frame 18, the first belt pulley 21 is fixed on the upper surface of the barrel body 1 by two symmetrically arranged support rods 22, the first belt pulley 21 and the rotating shaft 3 can do equidirectional rotary motion under the driving action of the stirring motor 2, a second belt pulley 23 is arranged above the belt pulley support frame 17, the first belt pulley 21 is rotationally connected with the second belt pulley 23 through a belt 24, a first connecting rod 25 is arranged below the second belt pulley 23, the upper end of the first connecting rod 25 is fixedly connected with the second belt pulley 23 through a fixing part, the lower end of the first connecting rod 25 is fixedly connected with a first bevel gear 26, the first bevel gear 26 can do, a second bevel gear 27 is arranged below the first bevel gear 26, the first bevel gear 26 is meshed with the second bevel gear 27, and the auxiliary stirring mechanism 4 is arranged on the right side of the second bevel gear 27;

the auxiliary stirring mechanism 4 comprises a second connecting rod 41, one end of the second connecting rod 41 penetrates through the left side wall of the barrel body 1 to be fixedly connected with the second bevel gear 27, the other end of the second connecting rod 41 is fixedly connected with a circular stirring blade 43, a spiral stirring blade 42 is fixedly mounted on the second connecting rod 41, the spiral stirring blade 42 is positioned on the left side of the circular stirring blade 43, and the spiral stirring blade 42 and the circular stirring blade 43 are arranged to enable liquid in the barrel body 1 to generate local vortexes in the stirring process, the vortexes are rapidly diffused to the periphery, and more liquid is rolled into the vortexes to be circulated and reciprocated, so that all components in the liquid are uniformly mixed;

the rotating shaft 3 is provided with a first stirring mechanism 31 and a second stirring mechanism 32, the second stirring mechanism 32 is positioned below the first stirring mechanism 31, the second stirring mechanism 32 is fixedly connected with the bottom end of the rotating shaft 3, the first stirring mechanism 31 comprises a sleeve 311, the sleeve 311 is fixedly sleeved at the upper end of the rotating shaft 3, four first stirring blades 312 with the same size are fixedly welded on the periphery of the outer wall of the sleeve 311, an included angle between two adjacent first stirring blades 312 is 90 degrees, the first stirring blades 312 are steel plates with right trapezoid upper and lower ends and rectangular middle, a plurality of through holes 313 are formed in the first stirring blades 312, and the irregular shape of the first stirring blades 312 and the design of the internal through holes 313 are beneficial to more uniform mixing of liquid in the barrel body 1 in the stirring process; the second stirring mechanism 32 comprises a fixed sleeve 321, the bottom end of the fixed sleeve 321 is welded at the central position of the upper surface of the rotating disc 322, a thread is arranged inside the fixed sleeve 321, the fixed sleeve 321 is in threaded connection with the bottom end of the rotating shaft 3, a second stirring blade 323 is fixedly installed on the outer edge of the rotating disc 322, the second stirring blades 323 are uniformly distributed on the outer edge of the rotating disc 322, the second stirring blades 323 are blades with a curved radian, and the curved radian is the same when the second stirring blades 323 are installed; through the arrangement of the first stirring mechanism 31 and the second stirring mechanism 32, the liquid in the barrel body 1 generates vortex in the horizontal direction, and all components are fused and diffused with each other, so that the liquid in the barrel body 1 is uniformly mixed to a greater extent;

the upper end of the feeding groove 13 is hinged with a sealing cover, the outer end of the water inlet pipe 15 is provided with the sealing cover, the discharge port 14 is provided with a control valve, and the connecting ports communicated with the interior of the barrel body 1 are sealed, so that the mixed liquid is prevented from discharging toxic and harmful gases and polluting the environment in the stirring process;

and the external part of the stirring motor 2 is connected with a frequency converter for adjusting the rotation speed of the stirring motor 2.

The working method of the stirring barrel comprises the following steps:

the raw materials to be stirred are put into the barrel body 1 through the feeding groove 13, then the water inlet pipe 15 is opened to add water with required amount, then the power supply is switched on, the rotation speed of the stirring motor 2 is controlled by adjusting the frequency converter, the rotating stirring motor 2 drives the rotating shaft 3 and the first belt pulley 21 to rotate, further the first belt pulley 21 drives the second belt pulley 23 to rotate through the belt 24, the second belt pulley 23 drives the first bevel gear 26 to rotate, the first bevel gear 26 drives the second bevel gear 27 meshed with the first bevel gear 26 to rotate, and further the auxiliary stirring mechanism 4 is driven to rotate; the pivot 3 drives first rabbling mechanism 31 and second rabbling mechanism 32 and rotates, through the setting of first rabbling mechanism 31, second rabbling mechanism 32 and supplementary rabbling mechanism 4, makes 1 inside liquid of staving stirred the misce bene, and the liquid of stirred misce bene passes through discharge gate 14 discharge agitator.

And step six, drying and curing the foamed mixture for 6 hours to obtain the durable fireproof polyurethane foam material.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.