Hole filling polyurethane foam material and preparation device thereof

Abstract

The invention discloses a hole filling polyurethane foam material and a preparation device thereof, relates to the technical field of polyurethane foam caulking agents, and aims to solve the problems that an existing polyurethane foam caulking agent is poor in wear resistance, flexibility and elastic property, and raw materials cannot be mixed uniformly due to the fact that the temperature required for mixing and stirring the raw materials cannot be guaranteed according to production requirements during preparation. According to the polyurethane foam joint mixture, hexamethylene diisocyanate is used as a main raw material of a polyurethane foam material, the strength and durability of the polyurethane foam joint mixture are improved, the oxidation resistance and hydrolysis resistance of the polyurethane material are enhanced, and therefore the service life of the joint mixture is prolonged; furthermore, the position adjustment of the heating pipes in the mixing barrel is realized through a transmission mechanism of the gear and the toothed belt, so that the heating pipes can be intelligently adjusted according to the actual stacking height of raw materials, the heat output by each heating pipe can directly act on the raw materials, and the energy waste is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane foam sealants, in particular to a hole-filling polyurethane foam material and a preparation device thereof. Background Art

[0002] Polyurethane foam sealant, as a high-efficiency moisture-curing semi-rigid polyurethane material, plays a vital role in the coal mining industry due to its excellent waterproof performance and outstanding thermal insulation properties. It is especially widely used in spraying and plugging air leaks to effectively prevent air leaks and ensure the safety and stability of mines. It needs to be mixed and stirred in the actual production process.

[0003] The prior art publication number CN110183605A discloses a polyurethane foam material suitable for high temperature operation, wherein the raw materials include, by weight: 60-150 parts of methyl polyphenyl isocyanate, 50-100 parts of polyether polyol, 0-50 parts of quick-drying polyether, 0.5-4 parts of quick-drying catalyst and 15 parts of combined propellant. The above polyurethane foam material suitable for high temperature operation has shortcomings. Although the device can realize the production of polyurethane foam, it has limitations. The polyurethane foam sealant prepared by methyl polyphenyl isocyanate has poor wear resistance, flexibility and elasticity, and is easily damaged by the collision of crushed coal. It will turn yellow after a period of use, affecting the appearance and causing performance degradation.

[0004] Therefore, in order to solve such problems, we propose a hole-filling polyurethane foam material and a preparation device thereof. Summary of the invention

[0005] The object of the present invention is to provide a hole-filling polyurethane foam material and a preparation device thereof, aiming to solve the problem of poor wear resistance, flexibility and elasticity of the existing polyurethane foam sealant in the above-mentioned background technology.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a hole-filling polyurethane foam material and a preparation device thereof, comprising the following components in parts by mass:

[0007] 25-40 parts of hexamethylene diisocyanate;

[0008] 30-50 parts of polyether polyol;

[0009] 5-15 parts of dimethyl ether;

[0010] Propane 2-8 parts;

[0011] 2-8 parts of butane;

[0012] Silicone oil 0.5-2 parts;

[0013] 0.5-2 parts of phenol-free phosphite antioxidant;

[0014] 0.1-0.5 parts of copper catalyst;

[0015] The rest is water;

[0016] The polyurethane foam preparation method comprises the following steps:

[0017] S1: Raw material preparation: accurately weigh dimethyl ether, propane, butane, silicone oil, hexamethylene diisocyanate, polyether polyol, phenol-free phosphite antioxidant and copper catalyst;

[0018] S2: Raw material pretreatment: ensure that all raw materials are dry, free of contamination, and within the appropriate temperature range, and operate at room temperature or slightly higher temperature;

[0019] S3: Premixing stage: first, the polyether polyol, silicone oil, phenol-free phosphite antioxidant and copper catalyst are transported to the inner barrel of the mixing barrel through the first feeding pipe for premixing, and the second stirring plate and the first stirring plate as well as the fourth stirring plate and the third stirring plate are driven at a low speed by the second motor to stir, so as to ensure that all solid components are fully dissolved or dispersed in the liquid;

[0020] S4: adding hexamethylene diisocyanate: after the temperature of the premix is ​​stable and uniform, slowly adding hexamethylene diisocyanate by dropwise addition or trickle addition;

[0021] S5: Adding and mixing the blowing agent: After the isocyanate is completely added and evenly mixed, dimethyl ether, propane and butane are added to the inner barrel through the second feed pipe using a metering pump;

[0022] S6: High-speed stirring and foaming: All raw materials are added and preliminarily mixed, and then immediately switched to high-speed stirring mode, using high-speed stirring to promote full reaction between the raw materials and generate a uniform bubble structure.

[0023] Furthermore, the liquid raw materials polyether polyol and silicone oil in S2 should be stirred evenly in advance.

[0024] Furthermore, before adding isocyanate in S4, it is necessary to ensure that the temperature of the premix is ​​between 20°C and 30°C.

[0025] Furthermore, before adding hexamethylene diisocyanate in S4, the second stirring plate and the first stirring plate as well as the fourth stirring plate and the third stirring plate should be in a continuous operation state.

[0026] Furthermore, the inner barrel temperature of the dimethyl ether, propane and butane in S5 should be controlled at 5°C to 40°C before addition.

[0027] Furthermore, during the stirring process in S6, the expansion of the foam and the temperature change should be closely monitored. When the foam reaches the desired expansion degree and uniformity, the stirring speed can be gradually reduced and finally the stirring can be stopped.

[0028] Furthermore, the inner bottom wall of the mixing barrel is fixedly connected to an inner barrel, the upper end of the mixing barrel is fixedly connected to a mounting plate, the upper end of the mounting plate is fixedly connected to a protective shell, the upper end of the protective shell is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a first threaded column, the lower end of the first threaded column passes through the mounting plate and the protective shell, the side wall of the first threaded column located inside the protective shell is fixedly connected to a third gear and a fourth gear, the side walls of the third gear and the fourth gear are both meshed with a toothed belt, the end of the toothed belt away from the first threaded column is meshed with a fifth gear, the lower end of the fifth gear is fixedly connected to a second threaded column, the lower end of the second threaded column passes through the mounting plate, the side wall of the second threaded column located inside the mixing barrel is threadedly connected to a second driving plate, and a plurality of connecting components are arranged at the lower end of the second driving plate, the connecting components include a mounting block, the upper end of the mounting block is fixedly connected to the first connecting plate, the inner wall of the first connecting plate is movably connected to an extension plate, and the mounting block in one connecting component is fixedly connected to the extension plate in another connecting component, and the side wall of the mounting block is fixedly connected to a heating pipe.

[0029] The cam is provided with a first end for receiving the first gear and a second end for receiving the second gear from the first gear.

[0030] Furthermore, the upper end of the protective shell is fixedly connected to the second motor, the output end of the second motor is fixedly connected to the first rotating column, the lower end of the first rotating column passes through the inner top wall of the protective shell, the lower end of the first rotating column is fixedly connected to the first gear, the side wall of the first gear is meshingly connected to the first inner gear ring, the first threaded column is located on the side wall inside the protective shell and is movably connected to the second gear, the lower end of the first inner gear ring is fixedly connected to the second gear, the side wall of the second gear is meshingly connected to the sixth gear, the lower end of the second gear is evenly fixedly connected to two first driving plates, the upper end of the second connecting plate is evenly provided with two through grooves, the first driving plate is slidably connected to the inner wall of the through groove, and the lower end of the first driving plate is fixedly connected to the second stirring plate.

[0031] Furthermore, a discharge pipe is provided on the side wall at the lower end of the mixing barrel, and a first feed pipe and a second feed pipe are provided on the side wall at the upper end of the mixing barrel, one end of the discharge pipe, the first feed pipe and the second feed pipe all penetrate the inner wall of the inner barrel, the inner wall of the mixing barrel and the outer wall of the inner barrel are both provided with a first limiting groove, the second driving plate is slidably connected to the inner wall of the first limiting groove, a second limiting groove is provided on the upper end of the mounting plate, the inner wall of the second limiting groove is movably connected to a limiting ring, the upper end of the limiting ring is fixedly connected to the second inner gear ring, the side wall of the first threaded column is fixedly connected to the first limiting plate, the upper surface of the first limiting plate is movably connected to the second gear, the lower end of the second gear is fixedly connected to the second limiting plate, and the upper surface of the second limiting plate is movably connected to the sixth gear.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention proposes a hole-filling polyurethane foam material and a preparation device thereof, which utilizes hexamethylene diisocyanate as the main raw material of the polyurethane foam material, improves the strength and durability of the polyurethane foam sealant, and enhances the ability of the polyurethane material to resist oxidation and hydrolysis, thereby extending the service life of the sealant. The use of a phenol-free phosphite antioxidant effectively prevents the polyurethane foam sealant from being degraded due to oxidation during long-term use, thereby further extending its service life. The copper catalyst can catalyze the oxidation of harmful gases such as carbon monoxide and hydrogen sulfide in coal mines, converting them into harmless substances such as carbon dioxide and water, thereby reducing damage to the health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A preparation flow chart of a hole-filling polyurethane foam material and a preparation device thereof according to the present invention;

[0035] Figure 2 A three-dimensional structure of a mixing barrel in a hole-filling polyurethane foam material and a preparation device thereof according to the present invention Figure 1 ;

[0036] Figure 3A three-dimensional structure of a mixing barrel in a hole-filling polyurethane foam material and a preparation device thereof according to the present invention Figure 2 ;

[0037] Figure 4 A three-dimensional diagram of the internal structure of a mixing barrel in a hole-filling polyurethane foam material and a preparation device thereof according to the present invention;

[0038] Figure 5 A cross-sectional view of a mixing barrel in a hole-filling polyurethane foam material and a preparation device thereof according to the present invention;

[0039] Figure 6 The internal structure of the inner barrel in the hole-filling polyurethane foam material and the preparation device thereof of the present invention is a three-dimensional Figure 1 ;

[0040] Figure 7 The internal structure of the inner barrel in the hole-filling polyurethane foam material and the preparation device thereof of the present invention is a three-dimensional Figure 2 ;

[0041] Figure 8 It is a three-dimensional exploded view of a first stirring plate in a hole-filling polyurethane foam material and a preparation device thereof of the present invention;

[0042] Fig. 9 The present invention is a cross-sectional view of a second connecting plate in a hole-filling polyurethane foam material and a preparation device thereof.

[0043] Legend:

[0044] 1. Mixing barrel; 101. Discharging pipe; 102. First feeding pipe; 103. Second feeding pipe; 11. Inner barrel; 110. First limiting groove; 12. Mounting plate; 121. Protective shell; 122. Second limiting groove; 13. First motor; 131. Second motor; 132. First rotating column; 133. First gear; 134. First inner gear ring; 135. Second gear; 136. First driving plate; 14. First threaded column; 15. Third gear; 151. Fourth gear; 152. Toothed belt; 153. Fifth gear; 154. Second threaded column; 155. Second driving plate; 16. Connecting assembly; 1 61. Mounting block; 162. First connecting plate; 163. Extension plate; 17. Heating tube; 18. First stirring plate; 181. Second stirring plate; 182. Through hole; 183. Second connecting plate; 1831. Third limiting groove; 1832. Through groove; 1833. Slide groove; 1834. Rotating ring; 1835. Third connecting plate; 1836. Rotating block; 1837. Driving cylinder; 19. Second inner gear ring; 191. Sixth gear; 192. Second rotating column; 193. Third stirring plate; 194. Fourth stirring plate; 195. Connecting block; 196. Limiting ring; 2. First limiting plate; 21. Second limiting plate. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In order to solve the problem that the existing polyurethane foam sealant has poor wear resistance, flexibility and elasticity, and the temperature required for mixing and stirring the raw materials cannot be guaranteed according to production needs during preparation, resulting in uneven mixing of the raw materials, please refer to Figure 1-Figure 9 , providing a technical solution: a hole-filling polyurethane foam material and a preparation device thereof, comprising the following components in parts by mass;

[0047] 25-40 parts of hexamethylene diisocyanate;

[0048] 30-50 parts of polyether polyol;

[0049] 5-15 parts of dimethyl ether;

[0050] Propane 2-8 parts;

[0051] 2-8 parts of butane;

[0052] Silicone oil 0.5-2 parts;

[0053] 0.5-2 parts of phenol-free phosphite antioxidant;

[0054] 0.1-0.5 parts of copper catalyst;

[0055] The rest is water;

[0056] The polyurethane foam preparation method comprises the following steps:

[0057] Step 1: Raw material preparation: accurately weigh dimethyl ether, propane, butane, silicone oil, hexamethylene diisocyanate, polyether polyol, phenol-free phosphite antioxidant and copper catalyst;

[0058] Step 2: Raw material pretreatment: Ensure that all raw materials are dry, free of contamination, and within the appropriate temperature range, and operate at room temperature or slightly higher temperature to promote mixing and reaction of raw materials;

[0059] Step 3: Premixing stage: first, the polyether polyol, silicone oil, phenol-free phosphite antioxidant and copper catalyst are transported to the interior of the inner barrel 11 in the mixing barrel 1 through the first feeding pipe 102 for premixing, and the second motor 131 is used to drive the second stirring plate 181 and the first stirring plate 18 as well as the fourth stirring plate 194 and the third stirring plate 193 at a low speed for stirring to ensure that all solid components are fully dissolved or dispersed in the liquid;

[0060] Step 4: Adding hexamethylene diisocyanate: After the temperature of the premix is ​​stable and uniform, slowly add hexamethylene diisocyanate by dropwise addition or trickle addition to avoid gelation or a sharp rise in temperature due to excessive local reaction;

[0061] Step 5: Adding and mixing the blowing agent: After the isocyanate is completely added and evenly mixed, dimethyl ether, propane and butane are added to the inner barrel 11 through the second feed pipe 103 using a metering pump;

[0062] Step 6: High-speed stirring and foaming: All raw materials are added and preliminarily mixed, and then immediately switched to high-speed stirring mode. High-speed stirring is used to promote full reaction between the raw materials and generate a uniform bubble structure.

[0063] In step 2, the liquid raw materials polyether polyol and silicone oil should be stirred evenly in advance to avoid precipitation or stratification.

[0064] In step 4, before adding isocyanate, it is necessary to ensure that the temperature of the premix is ​​between 20°C and 30°C to avoid the temperature being too high or too low, which will affect the reaction rate and the performance of the foam.

[0065] Before adding hexamethylene diisocyanate in step 4, the second stirring plate 181 and the first stirring plate 18 as well as the fourth stirring plate 194 and the third stirring plate 193 should be in a continuous operation state to ensure that the premixture is uniform and stable, which helps the hexamethylene diisocyanate to be quickly and evenly dispersed in the premixture after addition.

[0066] In step 5, the temperature of the inner barrel 11 should be controlled at 5°C to 40°C before adding dimethyl ether, propane and butane to avoid the foaming agent not being able to fully volatilize due to too low a temperature or the foam being cured prematurely due to too high a temperature.

[0067] During the stirring process in step 6, the expansion of the foam and the temperature change should be closely monitored. When the foam reaches the desired expansion degree and uniformity, the stirring speed can be gradually reduced and finally stopped.

[0068] The inner bottom wall of the mixing barrel 1 is fixedly connected to the inner barrel 11, the upper end of the mixing barrel 1 is fixedly connected to the mounting plate 12, the upper end of the mounting plate 12 is fixedly connected to the protective shell 121, the upper end of the protective shell 121 is fixedly connected to the first motor 13, the output end of the first motor 13 is fixedly connected to the first threaded column 14, the lower end of the first threaded column 14 passes through the mounting plate 12 and the protective shell 121, the side wall of the first threaded column 14 located inside the protective shell 121 is fixedly connected to the third gear 15 and the fourth gear 151, the side walls of the third gear 15 and the fourth gear 151 are meshed with a toothed belt 152, and the end of the toothed belt 152 away from the first threaded column 14 is meshed with a fifth gear 153, the lower end of the fifth gear 153 is fixedly connected with a second threaded column 154, the lower end of the second threaded column 154 passes through the mounting plate 12, the second threaded column 154 is located on the side wall inside the mixing barrel 1 and is threadedly connected with a second driving plate 155, and the lower end of the second driving plate 155 is provided with a plurality of connecting components 16, the connecting component 16 includes a mounting block 161, the upper end of the mounting block 161 is fixedly connected with a first connecting plate 162, the inner wall of the first connecting plate 162 is movably connected with an extension plate 163, and the mounting block 161 in one connecting component 16 is fixedly connected with the extension plate 163 in another connecting component 16, and the side wall of the mounting block 161 is fixedly connected with a heating pipe 17.

[0069] Specifically, the first motor 13 is started, so that the first motor 13 drives the first threaded column 14 to rotate, so that the first threaded column 14 simultaneously drives the third gear 15 and the fourth gear 151 to rotate, so that the third gear 15 and the fourth gear 151 respectively drive the toothed belt 152 to rotate, so that the toothed belt 152 drives the fifth gear 153 to rotate, so that the fifth gear 153 drives the second threaded column 154 to rotate, so that the second threaded column 154 drives the second driving plate 155 to move along the Z-axis direction, so that the second driving plate 155 drives the plurality of heating tubes 17 to adjust their positions through the sliding of the extension plate 163 in the connecting assembly 16 on the inner wall of the first connecting plate 162, so that the heating tubes 17 can be adjusted in position according to the height of the raw material stacking in the inner barrel 11, so that the heat output by each heating tube 17 can directly heat the raw material, thereby reducing energy waste and achieving uniform heating of the raw material.

[0070] The first threaded column 14 is provided with a first stirring plate 18 at the lower end, and the inner wall of the first stirring plate 18 is movably connected with the second stirring plate 181, and the upper end of the second stirring plate 181 is provided with a through hole 182, and the upper end of the second stirring plate 181 is fixedly connected with the second connecting plate 183, the lower end of the first threaded column 14 passes through the through hole 182 and the second connecting plate 183, and the upper end of the second connecting plate 183 is provided with a third limiting groove 1831, and the side wall of the second connecting plate 183 is provided with a sliding groove 1833, and the inner wall of the sliding groove 1833 is movably connected with a rotating ring 1834, and the side wall of the rotating ring 1834 is evenly and fixedly connected with two third connecting plates 1835, and the inner wall of the third limiting groove 1831 is movably connected with a rotating block 1836, and the side wall of the first threaded column 14 A driving cylinder 1837 is threadedly connected, and the lower end of the driving cylinder 1837 is fixedly connected to the rotating block 1836. A second internal gear ring 19 is provided at the upper end of the mounting plate 12. Two sixth gears 191 are evenly and fixedly connected to the inner wall of the second internal gear ring 19. A second rotating column 192 is fixedly connected to the lower end of the sixth gear 191. A third stirring plate 193 is fixedly connected to the lower end of the second rotating column 192. A fourth stirring plate 194 and a connecting block 195 are movably sleeved on the side wall of the second rotating column 192. The lower end of the connecting block 195 is fixedly connected to the fourth stirring plate 194. One end of the third connecting plate 1835 away from the rotating ring 1834 is movably connected to the side wall of the connecting block 195, and the fourth stirring plate 194 is slidably connected to the inner wall of the third stirring plate 193.

[0071] Specifically, when the first threaded column 14 drives the third gear 15 and the fourth gear 151 to rotate, it also drives the driving cylinder 1837 to adjust its position along the Z axis, so that the driving cylinder 1837 drives the second connecting plate 183 to adjust its position along the Z axis through the rotating block 1836, so that the second connecting plate 183 drives the second stirring plate 181 to slide on the inner wall of the first stirring plate 18, and at the same time, the second connecting plate 183 drives the fourth stirring plate 194 to slide on the inner wall of the third stirring plate 193 through the rotating ring 1834, the third connecting plate 1835 and the connecting block 195, so as to achieve the adjustment of the total height of the second stirring plate 181 and the first stirring plate 18 and the fourth stirring plate 194 and the third stirring plate 193, thereby achieving the linkage between the position adjustment of the heating tube 17 along the Z axis, the adjustment of the total height of the second stirring plate 181 and the first stirring plate 18 and the fourth stirring plate 194 and the third stirring plate 193.

[0072] A second motor 131 is fixedly connected to the upper end of the protective shell 121, and a first rotating column 132 is fixedly connected to the output end of the second motor 131. The lower end of the first rotating column 132 passes through the inner top wall of the protective shell 121, and a first gear 133 is fixedly connected to the lower end of the first rotating column 132. The side wall of the first gear 133 is meshed with a first internal gear ring 134. The side wall of the first threaded column 14 located inside the protective shell 121 is movably connected with a second gear 135. The lower end of the first internal gear ring 134 is fixedly connected to the second gear 135, and the side wall of the second gear 135 is meshed with the sixth gear 191. The lower end of the second gear 135 is evenly fixedly connected with two first driving plates 136, and the upper end of the second connecting plate 183 is evenly provided with two through grooves 1832. The first driving plate 136 is slidably connected to the inner wall of the through groove 1832, and the lower end of the first driving plate 136 is fixedly connected to the second stirring plate 181.

[0073] Specifically, the second motor 131 drives the first rotating column 132 to rotate, so that the first rotating column 132 drives the first gear 133 to rotate, so that the first gear 133 drives the first inner gear ring 134 to rotate, so that the first inner gear ring 134 drives the second gear 135 to rotate, so that the second gear 135 drives the sixth gear 191 to rotate through the second inner gear ring 19, so that the sixth gear 191 drives the second rotating column 192 to rotate, so that the second rotating column 192 drives the fourth stirring plate 194 and the third stirring plate 193 to rotate, so that the fourth stirring plate 194 and the third stirring plate 193 rotate on the inner wall of the inner barrel 11, and rotate at the same time, and then the second gear 135 drives the second stirring plate 181 and the first stirring plate 18 to rotate through the first driving plate 136, so as to realize the linkage between the stirring of the material by the fourth stirring plate 194 and the third stirring plate 193, the stirring of the material by the second stirring plate 181 and the first stirring plate 18, and the cleaning of the inner wall of the inner barrel 11 by the fourth stirring plate 194 and the third stirring plate 193.

[0074] A discharge pipe 101 is provided on the side wall at the lower end of the mixing barrel 1, and a first feed pipe 102 and a second feed pipe 103 are provided on the side wall at the upper end of the mixing barrel 1. One end of the discharge pipe 101, the first feed pipe 102 and the second feed pipe 103 all penetrate the inner wall of the inner barrel 11. The inner wall of the mixing barrel 1 and the outer wall of the inner barrel 11 are both provided with a first limiting groove 110. The second driving plate 155 is slidably connected to the inner wall of the first limiting groove 110. A second limiting groove 122 is provided on the upper end of the mounting plate 12. The inner wall of the second limiting groove 122 is movably connected to a limiting ring 196. The upper end of the limiting ring 196 is fixedly connected to the second inner gear ring 19. The side wall of the first threaded column 14 is fixedly connected to the first limiting plate 2. The upper surface of the first limiting plate 2 is movably connected to the second gear 135. The lower end of the second gear 135 is fixedly connected to the second limiting plate 21. The upper surface of the second limiting plate 21 is movably connected to the sixth gear 191.

[0075] The first threaded column 14 is driven to rotate by the first motor 13, and then the position of the heating tube 17 in the mixing barrel 1 is adjusted through the transmission mechanism of the third gear 15, the fourth gear 151 and the toothed belt 152, so that the heating tube 17 can be intelligently adjusted according to the actual stacking height of the raw materials, ensuring that the heat output by each heating tube 17 can directly act on the raw materials, greatly reducing the waste of energy, and the position adjustability of the heating tube 17 ensures that the raw materials can be evenly heated during the mixing process, which not only improves the mixing efficiency, but also ensures the quality consistency of the final product. Secondly, through the transmission of the first threaded column 14 and the driving cylinder 1837, the height of the second stirring plate 181 and the first stirring plate 18 and the fourth stirring plate 194 and the third stirring plate 193 can be adjusted according to the amount of raw materials and the mixing This flexibility ensures that the device can adapt to the mixing needs under different production conditions, and realizes the linkage between the position adjustment of the heating tube 17 along the Z-axis, the total height adjustment of the second stirring plate 181 and the first stirring plate 18, and the fourth stirring plate 194 and the third stirring plate 193. Secondly, a multi-stage stirring system consisting of the first stirring plate 18, the second stirring plate 181, the third stirring plate 193 and the fourth stirring plate 194 is adopted, which can form a complex stirring flow field in the mixing barrel 1, effectively improve the mixing uniformity of the raw materials, and realize the stirring of the materials by the fourth stirring plate 194 and the third stirring plate 193, the stirring of the materials by the second stirring plate 181 and the first stirring plate 18, and the cleaning of the inner wall of the inner barrel 11 by the fourth stirring plate 194 and the third stirring plate 193.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hole-filled polyurethane foam material, characterized in that: The composition includes the following components in parts by weight: 25-40 parts of hexamethylene diisocyanate; 30-50 parts of polyether polyol; 5-15 parts of dimethyl ether; Propane 2-8 parts; 2-8 parts of butane; Silicone oil 0.5-2 parts; 0.5-2 parts of phenol-free phosphite antioxidant; 0.1-0.5 parts of copper catalyst; The rest is water; The polyurethane foam preparation method comprises the following steps: S1: Raw material preparation: accurately weigh dimethyl ether, propane, butane, silicone oil, hexamethylene diisocyanate, polyether polyol, phenol-free phosphite antioxidant and copper catalyst; S2: Raw material pretreatment: ensure that all raw materials are dry, free of contamination, and within the appropriate temperature range, and operate at room temperature or slightly higher temperature; S3: Premixing stage: first, the polyether polyol, silicone oil, phenol-free phosphite antioxidant and copper catalyst are transported to the interior of the inner barrel (11) of the mixing barrel (1) through the first feeding pipe (102) for premixing, and the second stirring plate (181) and the first stirring plate (18) as well as the fourth stirring plate (194) and the third stirring plate (193) are driven at a low speed by the second motor (131) to stir, so as to ensure that all solid components are fully dissolved or dispersed in the liquid; S4: adding hexamethylene diisocyanate: after the temperature of the premix is ​​stable and uniform, slowly adding hexamethylene diisocyanate by dropwise addition or trickle addition; S5: Adding and mixing the blowing agent: After the isocyanate is completely added and mixed evenly, dimethyl ether, propane and butane are added into the inner barrel (11) through the second feed pipe (103) by using a metering pump; S6: High-speed stirring and foaming: All raw materials are added and preliminarily mixed, and then immediately switched to high-speed stirring mode, using high-speed stirring to promote full reaction between the raw materials and generate a uniform bubble structure.

2. The hole-filling polyurethane foam material according to claim 1, characterized in that: The liquid raw materials polyether polyol and silicone oil in S2 should be stirred evenly in advance.

3. The hole-filling polyurethane foam material according to claim 1, characterized in that: In S4, before adding isocyanate, it is necessary to ensure that the temperature of the premix is ​​between 20°C and 30°C.

4. The hole-filling polyurethane foam material according to claim 3, characterized in that: In the step S4, before adding hexamethylene diisocyanate, the second stirring plate (181) and the first stirring plate (18) as well as the fourth stirring plate (194) and the third stirring plate (193) should be in a continuous operation state.

5. The hole-filling polyurethane foam material according to claim 1, characterized in that: The temperature of the inner barrel (11) should be controlled at 5°C to 40°C before adding dimethyl ether, propane and butane in S5.

6. The hole-filling polyurethane foam material according to claim 1, characterized in that: During the stirring process in S6, the expansion of the foam and the temperature change should be closely monitored. When the foam reaches the desired expansion degree and uniformity, the stirring speed can be gradually reduced and finally stopped.

7. The device for preparing a hole-filling polyurethane foam material according to claim 1, characterized in that: The inner bottom wall of the mixing barrel (1) is fixedly connected to the inner barrel (11); the upper end of the mixing barrel (1) is fixedly connected to the mounting plate (12); the upper end of the mounting plate (12) is fixedly connected to the protective shell (121); the upper end of the protective shell (121) is fixedly connected to the first motor (13); the output end of the first motor (13) is fixedly connected to the first threaded column (14); the lower end of the first threaded column (14) passes through the mounting plate (12) and the protective shell (121); the side wall of the first threaded column (14) located inside the protective shell (121) is fixedly connected to the third gear (15) and the fourth gear (151); the side walls of the third gear (15) and the fourth gear (151) are meshedly connected to a toothed belt (152); the end of the toothed belt (152) away from the first threaded column (14) is meshedly connected to a fifth gear (151); The fifth gear (153) is provided with a second threaded column (154) fixedly connected to the lower end of the fifth gear (153), the lower end of the second threaded column (154) passes through the mounting plate (12), the second threaded column (154) is located on the side wall of the mixing barrel (1) and is threadedly connected to the second driving plate (155), and the lower end of the second driving plate (155) is provided with a plurality of connecting components (16), the connecting components (16) comprising a mounting block (161), the upper end of the mounting block (161) is fixedly connected to the first connecting plate (162), the inner wall of the first connecting plate (162) is movably connected to the extension plate (163), and the mounting block (161) in one connecting component (16) is fixedly connected to the extension plate (163) in another connecting component (16), and the side wall of the mounting block (161) is fixedly connected to the heating pipe (17).

8. The device for preparing a hole-filling polyurethane foam material according to claim 7, characterized in that: The first threaded column (14) is provided with a first stirring plate (18) at the lower end, the inner wall of the first stirring plate (18) is movably connected with a second stirring plate (181), the upper end of the second stirring plate (181) is provided with a through hole (182), the upper end of the second stirring plate (181) is fixedly connected with a second connecting plate (183), the lower end of the first threaded column (14) passes through the through hole (182) and the second connecting plate (183), the upper end of the second connecting plate (183) is provided with a third limiting groove (1831), the side wall of the second connecting plate (183) is provided with a sliding groove (1833), the inner wall of the sliding groove (1833) is movably connected with a rotating ring (1834), the side wall of the rotating ring (1834) is evenly and fixedly connected with two third connecting plates (1835), the inner wall of the third limiting groove (1831) is movably connected with a rotating block (1836), the first threaded column (14) The side wall is threadedly connected with a driving cylinder (1837), the lower end of the driving cylinder (1837) is fixedly connected to the rotating block (1836), the upper end of the mounting plate (12) is provided with a second inner gear ring (19), the inner wall of the second inner gear ring (19) is evenly and fixedly connected with two sixth gears (191), the lower end of the sixth gear (191) is fixedly connected with a second rotating column (192), the lower end of the second rotating column (192) is fixedly connected with a third stirring plate (193), the side wall of the second rotating column (192) is movably sleeved with a fourth stirring plate (194) and a connecting block (195), the lower end of the connecting block (195) is fixedly connected to the fourth stirring plate (194), one end of the third connecting plate (1835) away from the rotating ring (1834) is movably connected to the side wall of the connecting block (195), and the fourth stirring plate (194) is slidably connected to the inner wall of the third stirring plate (193).

9. The device for preparing a hole-filling polyurethane foam material according to claim 7, characterized in that: The upper end of the protective shell (121) is fixedly connected to a second motor (131), the output end of the second motor (131) is fixedly connected to a first rotating column (132), the lower end of the first rotating column (132) passes through the inner top wall of the protective shell (121), the lower end of the first rotating column (132) is fixedly connected to a first gear (133), the side wall of the first gear (133) is meshingly connected to a first internal gear ring (134), and the side wall of the first threaded column (14) located inside the protective shell (121) is movably connected to the second gear (134). 35), the lower end of the first inner gear ring (134) is fixedly connected to the second gear (135), the side wall of the second gear (135) is meshedly connected to the sixth gear (191), the lower end of the second gear (135) is evenly fixedly connected to two first drive plates (136), the upper end of the second connecting plate (183) is evenly provided with two through grooves (1832), the first drive plate (136) is slidably connected to the inner wall of the through groove (1832), and the lower end of the first drive plate (136) is fixedly connected to the second stirring plate (181).

10. The device for preparing a hole-filling polyurethane foam material according to claim 7, characterized in that: The side wall at the lower end of the mixing barrel (1) is provided with a discharge pipe (101), and the side wall at the upper end of the mixing barrel (1) is provided with a first feed pipe (102) and a second feed pipe (103); one end of the discharge pipe (101), the first feed pipe (102) and the second feed pipe (103) all penetrate the inner wall of the inner barrel (11); the inner wall of the mixing barrel (1) and the outer wall of the inner barrel (11) are both provided with a first limiting groove (110); the second driving plate (155) is slidably connected to the inner wall of the first limiting groove (110); and the mounting plate (155) is provided with a first limiting groove (110). 2) A second limiting groove (122) is provided at the upper end, the inner wall of the second limiting groove (122) is movably connected to a limiting ring (196), the upper end of the limiting ring (196) is fixedly connected to the second inner gear ring (19), the side wall of the first threaded column (14) is fixedly connected to a first limiting plate (2), the upper surface of the first limiting plate (2) is movably connected to the second gear (135), the lower end of the second gear (135) is fixedly connected to a second limiting plate (21), and the upper surface of the second limiting plate (21) is movably connected to the sixth gear (191).

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