Preparation process of high-temperature-resistant heat-insulating coating

Abstract

The invention relates to a preparation process of a high-temperature-resistant heat-insulating coating applied to the technical field of coating production, the prepared heat-insulating coating has the advantages of easily available raw materials, convenience in use, excellent heat preservation inhibition rate and low heat conductivity coefficient, and the temperature-resistant and heat-insulating effects of the heat-insulating coating are effectively improved; the lifting piston module in the air pressure cylinder ascends to make up a pressure relief space, so that the air pressure cylinder provides the pressure relief space for the reaction kettle and collects the discharged air, pollution to the production environment is effectively avoided, water vapor entering the air pressure cylinder is effectively prevented from being condensed into water, organic matters in gas are dissolved in the water, gas pretreatment is realized, and the water vapor is condensed into water, so that the water vapor is prevented from being condensed into water; the water vapor continuously enters the air pressure cylinder, and the efficiency of generating the water vapor in the reaction kettle body is improved, so that the water evaporation effect of the heat-insulating coating is effectively improved, and the preparation efficiency of the heat-insulating coating is effectively improved.

Description

Technical Field

[0001] The invention relates to a coating preparation process, in particular to a coating preparation process with high temperature resistance and heat insulation applied in the coating production technology field. Background Art

[0002] Thermal insulation coating is a special coating that can reflect infrared and ultraviolet rays in sunlight, thereby reducing the temperature of the surface of objects. This coating is usually used on the roofs, exterior walls, metal surfaces, etc. of buildings to reduce heat absorption and transfer, achieve energy saving and improve indoor comfort.

[0003] The specification of Chinese invention patent CN202410019835.5 discloses "An explosion-proof high-pressure reactor", including a reactor body, a pressure relief pipe, an exhaust box, a sealing plate and a stirring assembly. A feed port and a discharge port are provided on the reactor body, and both the feed port and the discharge port can be opened or closed; the pressure relief pipe is connected to the reactor body; the exhaust box is connected to the pressure relief pipe, and the volume of the exhaust box can be adjusted; the sealing plate is slidably arranged on the pressure relief pipe to control the on and off of the pressure relief pipe; the stirring assembly is used to stir the material in the reactor body.

[0004] During the preparation and processing of thermal insulation coating, it is necessary to relieve the pressure of the thermal insulation coating precursor and evaporate excess water in the thermal insulation coating precursor to make the thermal insulation coating reach a viscous state. However, the harmful gases produced by the reaction are discharged along with the water vapor, and the water vapor accounts for the vast majority. In order to safely discharge the harmful gases, the gases need to be collected and processed. Excessive water vapor affects the treatment of harmful gases. At the same time, the saturated state of water vapor is not conducive to the evaporation of water in the thermal insulation coating, affecting the preparation efficiency of the thermal insulation coating. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that excessive water vapor affects the treatment of harmful gases, and at the same time, the saturated state of water vapor is not conducive to the evaporation of water in the thermal insulation coating, affecting the preparation efficiency of the thermal insulation coating.

[0006] In order to solve the above problems, the present invention provides a preparation process of a high temperature resistant heat insulating coating, which specifically comprises the following steps:

[0007] Step 1: mixing nano-sized titanium dioxide and nano-sized aluminum oxide, deionized water, a dispersant and a solvent to form a dispersed suspension;

[0008] Step 2: performing a grinding process and an ultrasonic mixing process to form a thermal insulation coating precursor;

[0009] Step 3: placing the thermal insulation coating precursor in a high pressure reactor, stirring for 5 to 7 hours at a temperature of 350° C. to 450° C. and a pressure of 4 MPa to 6 MPa;

[0010] Step 4: Relieve the pressure inside the autoclave to normal pressure, heat the thermal insulation coating precursor in the autoclave, and evaporate part of the water until the thermal insulation coating precursor is in a viscous state;

[0011] Step 5: adding silicone resin, polyimide resin and solvent to the viscous body of the thermal insulation coating, and fully mixing to obtain a high temperature resistant thermal insulation coating;

[0012] The high-pressure reactor comprises a reactor body, the top of which is fixedly connected with a pressure cylinder, a venting port is fixedly connected between the pressure cylinder and the reactor body, a lifting piston module is movably connected inside the pressure cylinder, and the lifting piston module is vertically corresponding to the venting port;

[0013] Heat sinks are fixedly distributed on the outer surface of the air pressure cylinder, an internal water collecting tank is fixedly connected to the bottom end of the air pressure cylinder, a one-way exhaust pipe is fixedly connected to one end of the lifting piston module, the one-way exhaust pipe passes through the top of the air pressure cylinder and extends out, a movable sealing cover is movably inserted at the top of the air vent, and a connecting column is fixedly connected to the top of the movable sealing cover, a connecting hole is opened in the middle of the lifting piston module, the connecting hole is plugged into the connecting column, and a hoop ring is fixedly connected to the lower mouth of the connecting hole, and the hoop ring is sleeved with the connecting column, the outer periphery of the upper mouth of the air vent is fixedly connected to a limiting bracket in a ring shape, a pressure spring is fixedly connected between the limiting bracket and the top outer ring of the movable sealing cover, and the elastic force of the pressure spring is less than the friction force of the hoop ring on the connecting column.

[0014] In the preparation process of the above-mentioned high temperature-resistant thermal insulation coating, the raw materials of the thermal insulation coating prepared by the present invention are easy to obtain and easy to use, have an excellent thermal insulation suppression rate, effectively improve the temperature resistance and heat insulation effect of the thermal insulation coating, and provide a pressure relief space for the reactor through the air cylinder, and the water vapor entering the air cylinder is condensed into water, thereby effectively improving the water evaporation effect of the thermal insulation coating, and then effectively improving the preparation efficiency of the thermal insulation coating.

[0015] As a further improvement of the present application, the solid content of the nano-scale powder selected in step one is 20% to 40%, and the pH value of the dispersed suspension in step two is adjusted to 7.5 to 8.0.

[0016] As a further improvement of the present application, the concentration of the organic silicone resin added in step five is 5% to 10%, and the solid content of the polyimide resin and the solvent accounts for 40% to 60%.

[0017] As a further improvement of the present application, an external water collecting tank is fixedly connected to the outside of the bottom end of the air pressure cylinder, and a water outlet is fixedly connected between the external water collecting tank and the internal water collecting tank, so that the external water collecting tank and the internal water collecting tank are connected via the water outlet, which facilitates the discharge of condensed water.

[0018] As another improvement of the present application, the outer sleeve of the reactor body is provided with a lifting ring, and the outer part of the lifting ring is fixedly connected with a water-wiping piece, which is slidably connected to the heat sink and is made of sponge material. The condensed water is smeared on the surface of the heat sink by the water-wiping piece, and the cooling effect of the heat sink on the air cylinder is further improved by the evaporation of water, thereby effectively improving the condensation efficiency of the water vapor inside the air cylinder.

[0019] As another improvement supplement to the present application, the outside of the lifting piston module is fixedly connected with a linkage rope, which runs through the top of the air pressure cylinder, and the lifting ring is fixedly connected to the end of the linkage rope away from the lifting piston module. The linkage rope is used to realize the transmission connection between the lifting ring and the lifting piston module, that is, when the lifting piston module descends, the lifting ring is driven to rise, and vice versa when the lifting piston module rises, the lifting ring is driven to descend.

[0020] As another improved supplement of the present application, a filter module is fixedly connected to the inside of the water outlet, and the outside of the filter module is covered with a bracket frame. The filter module is used to filter the water flowing inside the water outlet, thereby preventing the leakage of organic matter in the condensed water.

[0021] As another improvement of the present application, the interior of the filter module is equidistantly inlaid with reinforced barriers, and the surfaces of the reinforced barriers are provided with flow holes. The reinforced barriers are utilized to improve the compression resistance of the filter module and effectively prevent the filter module from being excessively deformed due to water pressure.

[0022] As another improvement supplement of the present application, the flow hole is set in a conical shape at one end facing the outside of the air pressure cylinder, and a flow blocking plug is movably connected to the inside of the flow hole. The flow blocking plug is set in a truncated cone shape corresponding to the flow hole, and the flow blocking plug is made of rubber material. When the air pressure inside the air pressure cylinder is too high, the compressed water flows from the inner water collecting tank to the outer water collecting tank, and the flow blocking plug is used to block the flow hole, thereby effectively preventing the inner water collecting tank from being excessively squeezed out.

[0023] In summary, the raw materials of the thermal insulation coating prepared by the present invention are easy to obtain and easy to use, have excellent thermal insulation suppression rate, and low thermal conductivity, which effectively improves the temperature resistance and heat insulation effect of the thermal insulation coating. During the pressure relief operation in the preparation process of the thermal insulation coating, the lifting piston module in the air cylinder rises to make way for the pressure relief space, so that the air cylinder provides a pressure relief space for the reactor and collects the leaked air, effectively avoiding pollution to the production environment. The water vapor entering the air cylinder condenses into water, and the organic matter in the dissolved gas in the water is used to pre-treat the gas. As the water vapor condenses into water, the water vapor continues to enter the air cylinder, which accelerates the efficiency of generating water vapor inside the reactor body, thereby effectively improving the water evaporation effect of the thermal insulation coating, and further effectively improving the preparation efficiency of the thermal insulation coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present application;

[0025] Figure 2 This is a three-dimensional top view of the air pressure cylinder of the first embodiment of the present application;

[0026] Figure 3 It is a plan cross-sectional view of the first embodiment of the present application;

[0027] Figure 4 This is a planar cross-sectional view of the air pressure cylinder according to the first embodiment of the present application;

[0028] Figure 5 This is a demonstration diagram of the rising movement of the lifting piston module in the first embodiment of the present application;

[0029] Figure 6 This is a three-dimensional structural diagram of a lifting piston module according to the first embodiment of the present application;

[0030] Figure 7 This is a three-dimensional structural diagram of the lifting piston module and the movable sealing cover of the first embodiment of the present application;

[0031] Figure 8 This is a planar cross-sectional view of a lifting piston module and a live seal cover according to the first embodiment of the present application;

[0032] Fig. 9 This is a three-dimensional structural diagram of a filter module according to a second embodiment of the present application;

[0033] Fig.10 This is a cross-sectional view of a filter module according to a second embodiment of the present application;

[0034] Fig.11 This is the test result diagram of the high temperature resistant thermal insulation coating for this application.

[0035] Description of the numbers in the figure:

[0036] 1. Reactor body; 101. Air cylinder; 102. Vent; 103. Heat sink; 104. Inner water collection tank; 2. Lifting piston module; 201. One-way exhaust pipe; 202. Live seal; 203. Connecting column; 204. Connecting hole; 205. Clamping ring; 206. Limit bracket; 207. Pressure spring; 3. Outer water collection tank; 301. Water outlet; 302. Lifting ring; 303. Water wiping sheet; 304. Linkage rope; 4. Filter module; 401. Bracket frame; 402. Reinforcement barrier; 403. Flow hole; 404. Flow stopper. DETAILED DESCRIPTION

[0037] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0038] The first implementation method:

[0039] A preparation process of a high temperature resistant heat insulating coating comprises the following steps:

[0040] Step 1: mixing nano-sized titanium dioxide and nano-sized aluminum oxide, deionized water, a dispersant and a solvent to form a dispersed suspension;

[0041] Step 2: performing a grinding process and an ultrasonic mixing process to form a thermal insulation coating precursor;

[0042] Step 3: placing the thermal insulation coating precursor in a high pressure reactor, stirring for 6 hours at a temperature of 380°C and a pressure of 5MPa;

[0043] Step 4: Relieve the pressure inside the autoclave to normal pressure, heat the thermal insulation coating precursor in the autoclave, and evaporate part of the water until the thermal insulation coating precursor is in a viscous state;

[0044] Step 5: adding silicone resin, polyimide resin and solvent to the viscous body of the thermal insulation coating, and fully mixing to obtain a high temperature resistant thermal insulation coating;

[0045] The solid content of the nano-scale powder selected in step 1 is 30%, the pH value of the dispersed suspension in step 2 is 7.9, the concentration of the organic silicon resin added in step 5 is 7%, and the solid content of the polyimide resin and the solvent accounts for 45%;

[0046] The prepared thermal insulation coating has been tested and has excellent thermal insulation inhibition rate, and its thermal insulation inhibition rate reaches 91%, which is higher than the 90% standard thermal insulation inhibition rate of the existing thermal insulation coating. The thermal conductivity of the prepared thermal insulation coating is only 0.048W / mK (1000℃), which is lower than the standard thermal conductivity of 0.05W / mK (1000℃), and the thermal reflectivity is 0.97, which is higher than the standard thermal reflectivity of 0.95. The solid content is 90%, which is higher than the standard 85%. The temperature resistance can reach 1300℃, which is higher than the existing standard of 1260℃. The thickness of the thermal insulation coating when applied is 1mm, which meets the existing coating standards, the adhesion meets the existing standards, and the hardness also meets the existing H5 standards. In the 60-day thermal storage test, the 1000-hour artificial aging test and the 1000-hour salt spray test, there are no bubbles, peeling and cracks. The specific test results are as follows Fig.11 As shown, the temperature resistance and heat insulation effect of the thermal insulation coating is effectively improved.

[0047] Figures 1 to 5As shown, the high-pressure reactor includes a reactor body 1, a pressure cylinder 101 is fixedly connected to the top of the reactor body 1, a venting port 102 is fixedly connected between the pressure cylinder 101 and the reactor body 1, a lifting piston module 2 is movably connected inside the pressure cylinder 101, the lifting piston module 2 is vertically corresponding to the venting port 102, a heat sink 103 is fixedly distributed on the outer surface of the pressure cylinder 101, an inner water collecting tank 104 is fixedly connected to the bottom of the pressure cylinder 101, and a one-way exhaust pipe 201 is fixedly connected to one end of the lifting piston module 2, and the one-way exhaust pipe 201 passes through the top of the pressure cylinder 101 and extends out;

[0048] During the pressure relief operation in the preparation process of the thermal insulation coating, the lifting piston module 2 in the pressure cylinder 101 rises to make way for the pressure relief space, and the high-pressure gas inside the reactor body 1 enters the pressure cylinder 101 through the vent port 102. The pressure cylinder 101 provides a pressure relief space for the reactor and collects the leaked air, effectively avoiding pollution to the production environment. After the high-pressure gas inside the reactor body 1 enters the pressure cylinder 101, the high-pressure gas entering the pressure cylinder 101 is mainly water vapor. The water vapor entering the pressure cylinder 101 condenses into water, and organic matter in the dissolved gas is dissolved in the water to achieve gas pretreatment. As the water vapor condenses into water, the water vapor continues to enter the pressure cylinder 101, accelerating the production inside the reactor body 1. The efficiency of generating water vapor is improved, thereby effectively improving the water evaporation effect of the thermal insulation coating, and then effectively improving the preparation efficiency of the thermal insulation coating. After the pressure cylinder 101 is connected to the reactor body 1 for a period of time, the lifting piston module 2 descends again, and at the same time, the one-way exhaust pipe 201 is opened to discharge the remaining gas in the pressure cylinder 101 through the one-way exhaust pipe 201. At the same time, the lifting piston module 2 cleans the water droplets on the inner wall of the pressure cylinder 101, and the water is collected in the inner water collecting tank 104 for recovery. Then the lifting piston module 2 performs a new round of upward movement, and re-inhales new water vapor into the pressure cylinder 101 for cooling, effectively avoiding excessive non-water vapor occupying the internal space of the pressure cylinder 101, thereby effectively improving the condensation efficiency of water vapor.

[0049] Figures 6 to 8 As shown, a live seal cover 202 is movably plugged into the top of the vent 102, a connecting column 203 is fixedly connected to the top of the live seal cover 202, a connecting hole 204 is opened in the middle of the lifting piston module 2, the connecting hole 204 is plugged into the connecting column 203, and a hoop ring 205 is fixedly connected to the lower opening of the connecting hole 204, the hoop ring 205 is sleeved with the connecting column 203, and a limiting bracket 206 is fixedly connected to the outer periphery of the upper opening of the vent 102 in an annular shape, and a pressure spring 207 is fixedly connected between the limiting bracket 206 and the top outer ring of the live seal cover 202, and the elastic force of the pressure spring 207 is less than the friction force of the hoop ring 205 on the connecting column 203;

[0050] When the lifting piston module 2 is in a descending state, that is, the interior of the reactor body 1 is in a high-pressure state, the lifting piston module 2 presses down the live seal 202, so that the live seal 202 closes the vent 102. When the lifting piston module 2 moves upward, the lifting piston module 2 tightens the clamp ring 205 and the connecting column 203, thereby utilizing the friction between the clamp ring 205 and the connecting column 203 to drive the live seal 202 to rise, thereby realizing the opening of the vent 102. When the lifting piston module 2 descends, the live seal 202 is forced to descend first to close the vent 102, so that the remaining gas in the air cylinder 101 is discharged from the one-way exhaust pipe 201.

[0051] The second implementation method:

[0052] Compared with the first embodiment, the main new addition is an outer water collecting tank 3, the specific new structure is as follows, and the rest of the structure is consistent with the first embodiment.

[0053] Figure 2 and Figures 5 and 6 As shown, the outer bottom of the air cylinder 101 is fixedly connected to an outer water collecting tank 3, and a water port 301 is fixedly connected between the outer water collecting tank 3 and the inner water collecting tank 104, so that the outer water collecting tank 3 and the inner water collecting tank 104 are connected by the water port 301, which is convenient for the discharge of condensed water. The outer sleeve of the reactor body 1 is provided with a lifting ring 302, and the outer side of the lifting ring 302 is fixedly connected to a water wiping piece 303, which is slidably connected to the heat sink 103, and the water wiping piece 303 is made of sponge material. The condensed water is smeared on the surface of the heat sink 103 by the water wiping piece 303, and the condensed water is discharged by evaporation of the water. To further improve the cooling effect of the heat sink 103 on the air cylinder 101, thereby effectively improving the condensation efficiency of the water vapor inside the air cylinder 101, the outside of the lifting piston module 2 is fixedly connected with a linkage rope 304, the linkage rope 304 runs through the top of the air cylinder 101, and the lifting ring 302 is fixedly connected to the end of the linkage rope 304 away from the lifting piston module 2. The linkage rope 304 is used to realize the transmission connection between the lifting ring 302 and the lifting piston module 2, that is, when the lifting piston module 2 descends, the lifting ring 302 is driven to rise, and vice versa, when the lifting piston module 2 rises, the lifting ring 302 is driven to descend;

[0054] The outer water collecting tank 3 is connected to the inner water collecting tank 104 by the water inlet 301. Water recovery can be achieved by installing a drainage structure on the outer water collecting tank 3. At the same time, a water inlet structure is installed on the outer water collecting tank 3. At the same time, the newly input cold water is mixed with the condensed water to dilute the condensed water and reduce the temperature of the condensed water. When the lifting piston module 2 moves up and down, the lifting ring 302 is linked and synchronized with the lifting piston module 2 through the linkage rope 304. The water smearing sheet 303 is first immersed in the outer water collecting tank 3 to absorb enough water. Then, when the lifting ring 302 rises, the water smearing sheet 303 smears water on the surface of the heat sink 103. The evaporation of water further improves the cooling effect of the heat sink 103 on the air cylinder 101, thereby effectively improving the condensation efficiency of the water vapor inside the air cylinder 101.

[0055] Figure 2 and Fig. 9 As shown, a filter module 4 is fixedly connected to the inside of the water port 301, and a support frame 401 is coated on the outside of the filter module 4. The filter module 4 is used to filter the water flowing inside the water port 301, thereby preventing the leakage of organic matter in the condensed water. The inside of the filter module 4 is equidistantly inlaid with reinforcement blocks 402, and the surface of the reinforcement blocks 402 is provided with flow holes 403. The reinforcement blocks 402 are used to improve the pressure resistance of the filter module 4, and effectively prevent the filter module 4 from being deformed excessively due to water pressure.

[0056] The filter module 4 is used to filter the water flowing inside the water inlet 301, and the filtered water is then mixed with the cold water in the external water collecting tank 3. When the subsequent water is applied to the surface of the heat sink 103 and evaporates, the solubility of organic matter in the applied water is effectively reduced, thereby preventing the leakage of organic matter in the condensed water. The bracket frame 401 effectively improves the protection effect of the filter module 4, and facilitates the replacement and installation of the filter module 4. The reinforced barrier 402 is used to improve the pressure resistance of the filter module 4, effectively preventing the filter module 4 from being deformed due to excessive water pressure.

[0057] Fig. 9 and Fig.10 As shown, the end of the flow hole 403 facing the outside of the air pressure cylinder 101 is set in a conical shape, and the flow hole 403 is movably connected with a flow blocker 404. The flow blocker 404 is set in a truncated cone shape corresponding to the flow hole 403, and the flow blocker 404 is made of rubber material. When the air pressure inside the air pressure cylinder 101 is too high, when the compressed water flows from the inner water collection tank 104 to the outer water collection tank 3, the flow hole 403 is blocked by the flow blocker 404, thereby effectively preventing the inner water collection tank 104 from being excessively squeezed out;

[0058] When the filter module 4 filters the water flowing inside the water outlet 301, the water flows through the flow hole 403 on the reinforced barrier 402. When the high-pressure gas is just filled into the air cylinder 101, the air pressure inside the air cylinder 101 is relatively high. The high pressure exerts pressure on the water in the air cylinder 101. When the forced water flows from the inner water collecting tank 104 to the outer water collecting tank 3, the flow hole 403 is blocked by the flow plug 404, thereby effectively preventing the inner water collecting tank 104 from being excessively squeezed out.

[0059] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A preparation process of a high temperature resistant heat insulating coating, characterized in that: The specific steps include: Step 1: mixing nano-sized titanium dioxide and nano-sized aluminum oxide, deionized water, a dispersant and a solvent to form a dispersed suspension; Step 2: performing a grinding process and an ultrasonic mixing process to form a thermal insulation coating precursor; Step 3: placing the thermal insulation coating precursor in a high pressure reactor, stirring for 5 to 7 hours at a temperature of 350° C. to 450° C. and a pressure of 4 MPa to 6 MPa; Step 4: Relieve the pressure inside the autoclave to normal pressure, heat the thermal insulation coating precursor in the autoclave, and evaporate part of the water until the thermal insulation coating precursor is in a viscous state; Step 5: adding silicone resin, polyimide resin and solvent to the viscous body of the thermal insulation coating, and fully mixing to obtain a high temperature resistant thermal insulation coating; The high-pressure reactor comprises a reactor body (1), the top of the reactor body (1) is fixedly connected with a pressure cylinder (101), a venting port (102) is fixedly connected between the pressure cylinder (101) and the reactor body (1), a lifting piston module (2) is movably connected inside the pressure cylinder (101), and the lifting piston module (2) is vertically corresponding to the venting port (102); The outer surface of the air cylinder (101) is fixedly provided with heat sinks (103); the bottom end of the air cylinder (101) is fixedly connected to an inner water collecting tank (104); one end of the lifting piston module (2) is fixedly connected to a one-way exhaust pipe (201); the one-way exhaust pipe (201) passes through the top of the air cylinder (101) and extends out; the top of the air outlet (102) is movably connected to a movable sealing cover (202); the top of the movable sealing cover (202) is fixedly connected to a connecting column (203); a connecting hole is provided in the middle of the lifting piston module (2). (204), the connecting hole (204) is plugged into the connecting column (203), and the lower opening of the connecting hole (204) is fixedly connected with a clamp ring (205), and the clamp ring (205) is sleeved with the connecting column (203), and the upper opening of the venting port (102) is annularly fixedly connected to a limiting bracket (206) at its periphery, and a pressure spring (207) is fixedly connected between the limiting bracket (206) and the top outer ring of the movable seal cover (202), and the elastic force of the pressure spring (207) is smaller than the friction force of the clamp ring (205) on the connecting column (203).

2. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The solid content of the nano-scale powder selected in step 1 is 20% to 40%, and the pH value of the dispersed suspension in step 2 is adjusted to 7.5 to 8.

0.

3. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The concentration of the organic silicon resin added in step 5 is 5% to 10%, and the solid content of the polyimide resin and the solvent accounts for 40% to 60%.

4. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The bottom end of the air pressure cylinder (101) is fixedly connected to an outer water collecting tank (3), and a water outlet (301) is fixedly connected between the outer water collecting tank (3) and the inner water collecting tank (104).

5. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The outside of the reactor body (1) is provided with a lifting ring (302), the outside of the lifting ring (302) is fixedly connected with a water smear (303), the water smear (303) is slidably connected to the heat sink (103), and the water smear (303) is made of sponge material.

6. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The outside of the lifting piston module (2) is fixedly connected with a linkage rope (304), the linkage rope (304) passes through the top end of the air pressure cylinder (101), and the lifting ring (302) is fixedly connected to one end of the linkage rope (304) away from the lifting piston module (2).

7. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The interior of the water passage (301) is fixedly connected with a filter module (4), and the exterior of the filter module (4) is covered with a support frame (401).

8. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The interior of the filter module (4) is inlaid with reinforcement barriers (402) at equal intervals, and the surface of the reinforcement barriers (402) is provided with flow holes (403).

9. The preparation process of a high temperature resistant heat insulating coating according to claim 1, characterized in that: The end of the flow hole (403) facing the outside of the air pressure cylinder (101) is arranged in a conical shape, and a flow blocking plug (404) is movably connected inside the flow hole (403). The flow blocking plug (404) is arranged in a truncated cone shape corresponding to the flow hole (403), and the flow blocking plug (404) is made of rubber material.

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