Production method and production equipment of steel structure fireproof coating

Abstract

This invention provides a method and equipment for producing fire-retardant coatings for steel structures, including a tank and a base frame. The tank has movable legs at its bottom, and a vertical frame at the top of the base frame, with a locking mechanism on the frame to lock the tank in position. The tank has an end cap at the top, and a detachable top cap on top of the end cap. The base frame has a lifting device, specifically including a hydraulic cylinder and a lifting rod. One end of the lifting rod is connected to the piston rod of the hydraulic cylinder, and the other end of the lifting rod has an extension arm. A fixed platform is located at the end of the extension arm and is fixedly connected to the top cap. The top cap has a stirring device and a mixing device, both extending into the tank. The top cap also has a dispersing component extending into the tank. By driving the hydraulic cylinder to lift the rod, the top cap is moved upwards. The mixing device, stirring device, and dispersing component ensure that the flame retardant is evenly dispersed in the coating base material, achieving efficient mixing of the flame retardant.

Description

Technical Field

[0001] This invention relates to the field of fire-retardant coatings, specifically to a method and equipment for producing fire-retardant coatings for steel structures. Background Technology

[0002] Steel structures play a vital role in modern architecture, but fire safety remains a primary concern. Fire-retardant coatings for steel structures are specially designed to protect them from fire damage. In the event of a fire, they expand to form a fire-resistant and insulating layer, extending the fire resistance of the steel structure and protecting the building's structural safety.

[0003] A Chinese patent document CN214183657U describes a pumping device for a fire-retardant coating curing agent. The device includes a traveling trolley with a mixing tank. A vertically positioned mixing shaft is located within the mixing tank. The end of the power output shaft of a mixing motor is detachably and fixedly connected to the upper end of the mixing shaft. A first fixing block is detachably fixed to the upper end of the mixing shaft, and a first support rod is fixed to the first fixing block. One end of the first support rod is fixedly connected to the first fixing block, and the other end is fixed with a first mixing blade. A second fixing block is located at the lower end of the mixing shaft, and a second support rod is fixed to the second fixing block. One end of the second support rod is fixedly connected to the second fixing block, and the other end is fixed with a second mixing blade. A pumping mechanism is located on the traveling trolley near the mixing tank and is connected to the discharge port of the mixing tank. This invention has a simple structure, ensures uniform mixing of the fire-retardant coating curing agent, and enhances the pumping effect.

[0004] However, the aforementioned patents have several drawbacks in application. Existing flame retardants in fire-retardant coatings are typically prepared by mixing different types of flame retardants, but some of these flame retardants are difficult to disperse fully through simple mixing. Take ammonium polyphosphate, a common flame retardant, as an example; this substance is highly hygroscopic. Even with slight moisture absorption, bridging easily occurs between particles, making dispersion difficult. Conventional stirring equipment can only promote particle rolling but cannot effectively break down their agglomerated structure, ultimately leading to white spots in the coating and uneven distribution of the coating's fire-retardant performance, failing to meet fire-retardant performance standards.

[0005] Therefore, a method and equipment for producing fire-retardant coatings for steel structures are proposed here to solve the aforementioned problems. Summary of the Invention

[0006] In order to overcome the problem that some flame retardants in the prior art are difficult to fully disperse through simple mixing, resulting in uneven distribution of the fire-retardant performance of the coating, the present invention provides a method for producing fire-retardant coatings for steel structures and its production equipment.

[0007] The present invention is achieved by the following technical solution: a tank body and a base frame, the bottom of the tank body is provided with movable legs, the tank body is movably mounted on one side of the base frame, the top of the base frame is provided with a vertical frame, and the vertical frame is provided with a locking mechanism to lock the position of the tank body; the top of the tank body is provided with an end cover, and the top of the end cover is provided with a detachable top cover; The top of the base frame is equipped with a lifting device, which specifically includes a hydraulic cylinder and a lifting rod. One end of the lifting rod is connected to the hydraulic cylinder, and the other end of the lifting rod is equipped with an extension arm. The end of the extension arm is equipped with a fixed platform, which is fixedly connected to the top cover. The top cover is equipped with a stirring device and a mixing device, both of which extend into the interior of the tank. The top cover is also equipped with a dispersing component, which extends into the interior of the tank. Several feed inlets are provided on one side of the tank, and a discharge component is provided at the bottom of the tank. The discharge component includes a main discharge pipe, a discharge pipe and a return pipe. The main discharge pipe is connected to the bottom of the tank, and the end of the main discharge pipe is connected to the discharge pipe and the return pipe respectively.

[0008] As a preferred embodiment of the present invention, the locking mechanism includes a fixed support and side arms. The fixed support is located in the middle of the upright frame, and the side arms are symmetrically arranged on both sides of the upright frame. A locking sleeve is provided at the end of the side arm, and a locking motor is provided on the side arm. A lead screw is rotatably embedded in the locking sleeve, and a side plate is fixed at the end of the lead screw. The locking motor is gear-driven to the locking sleeve. The locking motor drives the gear to rotate, causing the lead screw to rotate and press the side plate against the outer wall of the tank. As a preferred embodiment of the present invention, the stirring device includes a stirring motor, a main shaft and a connecting arm. The stirring motor is fixed at the center of the top cover, the output end of the stirring motor is connected to the main shaft, the main shaft extends vertically downward into the tank, and the connecting arm is fixed at the end of the main shaft. The connecting arm is equipped with multiple mounting seats, and each mounting seat is hinged with multiple scrapers and multiple push plates. The multiple scrapers are in close contact with the side wall and bottom wall of the tank.

[0009] As a preferred embodiment of the present invention, the mixing device includes a mixing motor and a secondary shaft. The mixing motor is fixed on one side of the top cover, and the secondary shaft extends vertically downward into the tank. A toothed disc is installed at the bottom end of the secondary shaft, and an auger plate is provided on the outer periphery of the secondary shaft.

[0010] As a preferred embodiment of the present invention, a suspension platform is provided at the upper position inside the tank, and a vacuum plate is movably arranged on the suspension platform. A fixing block is provided on the main shaft, and the fixing block matches the vacuum plate. The vacuum plate divides the inside of the tank into a buffer zone and a stirring zone. A sleeve is provided at the bottom of the end cap, and the sleeve fits against the inner circumferential wall of the end cap.

[0011] A vacuum device is installed on the outside of the tank. The vacuum device includes a vacuum pump and a suction pipe. The vacuum pump is fixed to the outer wall of the tank. The output end of the vacuum pump is connected to the suction pipe. One end of the suction pipe passes through the side wall of the tank and is connected to the stirring zone.

[0012] As a preferred embodiment of the present invention, the dispersing component includes a power controller, an amplitude transformer, and a tool head. The power controller is mounted on the side arm, the amplitude transformer is mounted on the top cover, the power controller and the amplitude transformer are electrically connected, the bottom end of the amplitude transformer is fixedly connected to the tool head, and the tool head extends into the tank.

[0013] As a preferred embodiment of the present invention, the main discharge pipe has a built-in screen plate, and a handle is provided on one side of the main discharge pipe. The handle extends and is connected to the screen plate. The handle can adjust the rotation of the screen plate to adjust the opening and closing angle of the screen plate. A switching valve is provided between the discharge pipe and the return pipe. The switching valve can adjust the discharge flow direction. The other end of the reflux pipe extends through the side wall of the tank and connects to the stirring zone.

[0014] In a preferred embodiment of the present invention, the fixed support is V-shaped and abuts against the outer wall of the tank. A guide sleeve is provided on the side wall of the hydraulic cylinder, and a guide rod is provided at the bottom end of the extension wall. The guide rod and the guide sleeve are slidably engaged.

[0015] A method for producing fire-retardant coating for steel structures includes the following steps: S1. Fixed position: By pushing the tank, the moving leg moves closer to the base frame as the tank moves closer to the base frame. The outer periphery of the tank abuts against the fixed support frame, and the position is initially positioned. The tank is located between the side arms. The locking motor is started. The locking motor drives the gear to rotate, causing the locking sleeve to rotate. The screw then drives the side plate to press against the outer wall of the tank. The side plate and the fixed support frame firmly lock the tank in the predetermined position on the base frame. S2, Preparation for mixing: Multiple feed ports are connected to flame retardants of different components. The flame retardants are fed into the tank through the feed ports and fall naturally under the action of gravity. The hydraulic cylinder drives the lifting rod downward, which in turn moves the extension arm and the top cover downward simultaneously. The vacuum plate is suspended on the top of the fixed block. During the downward movement of the lifting rod, the vacuum plate stops sliding when it reaches the suspension platform. The main shaft, the auxiliary shaft, and the tool head continue to move downward until the sleeve and the end cover are in contact. At this time, the stirring zone and the buffer zone form a sealed cavity. The vacuum pump starts, and the air extraction pipe extracts the air from the stirring zone, reducing the air pressure inside the stirring zone to the set vacuum level. S3. Thorough mixing: The stirring motor starts, the main shaft rotates, and the scraper and pusher on the connecting arm rotate accordingly. The scraper scrapes off the material adhering to the inner wall of the tank, and the pusher pushes the material towards the center. When the mixing motor starts, the secondary shaft rotates, and the toothed disc rotates to fully mix the materials. During the mixing process, the auger blades rotate with the secondary shaft to lift the materials from the bottom of the tank upwards. When the energy controller is activated, it adjusts the power and frequency of the amplitude transformer to generate high-frequency vibration in the tool head. The high-frequency vibration of the tool head causes the flame retardant to be finely dispersed. S4. Discharge and subsequent processing: The mixed material enters the main discharge pipe, is filtered by the sieve plate, and then enters the discharge pipe. The material discharged from the discharge pipe is fire-retardant coating that meets the standards. The sieve plate will intercept the material that does not conform to the sieve plate aperture. The switching valve is switched to the return pipe, the sieve plate is opened, and the intercepted material is returned to the mixing zone from the return pipe to participate in the mixing again, so as to realize particle size classification control and circulation homogenization treatment.

[0016] Compared with the prior art, the advantages of this invention are: 1. Movable legs are provided at the bottom of the tank, which can facilitate flexible transfer between different work stations. By separating the tank and the top cover, it is easy to inspect and maintain the tank or equipment separately. The tank can be changed to a different size and moved closer to the base frame. The locking mechanism on the frame locks the tank, allowing the top cover to descend for subsequent mixing operations, thus improving the adaptability of equipment deployment and work efficiency.

[0017] 2. The upward and downward movement of the top cover is driven by a hydraulic cylinder and a lifting rod. During the lifting process, the guide rod slides within the guide sleeve to ensure a smooth and reliable lifting process. By setting a vacuum plate, the vacuum plate is coordinated with the suspension platform. The vacuum plate moves up and down with the lifting rod and is driven by the fixed block on the main shaft. When the top cover is in the downward position, the connecting arm, the toothed disc, and the tool head will enter the tank first, followed by the vacuum plate. At this time, the vacuum plate is lifted by the top of the fixed platform and located on the main shaft, continuing to descend. After the vacuum plate reaches the suspension platform, it stops moving. The main shaft, the secondary shaft, and the tool head continue to descend until they reach the mixing machine position, dividing the original single tank internal space into two independent chambers: a mixing zone and a buffer zone, which greatly improves the purity of the material in the mixing process.

[0018] 3. The vacuum equipment is fixed on the tank. When the bottom cover of the top cover comes into contact with the top of the end cover, the tank is sealed. The vacuum pump extracts the air from the stirring zone and stabilizes the internal air pressure of the tank at the set value, effectively inhibiting the oxidation of the material and its contact with oxygen, and ensuring the integrity and uniform dispersion of the active ingredients of the flame retardant.

[0019] 4. The mixing device is mainly used to scrape, push and gather materials. The main shaft is driven to rotate by the mixing motor, and the connecting arm rotates with the main shaft. During the rotation, several scrapers and pushers on the mounting base scrape, push and gather materials. The scrapers are close to the inner wall of the tank, and the pushers push the materials towards the center.

[0020] 5. The mixing device mainly mixes and disperses materials. The secondary shaft is driven to rotate by the mixing motor, and the toothed disc rotates synchronously with the secondary shaft to perform shearing and convection mixing on the materials. The material deposited at the bottom of the auger plate is continuously lifted to the middle and upper part to achieve efficient mixing.

[0021] 6. The dispersing component further vibrates some of the difficult-to-disperse flame retardant particles. The energy controller starts and adjusts the power and frequency of the amplitude transformer, so that the tool head generates high-frequency vibration, which fully decomposes and agglomerates some of the flame retardant particles and distributes them evenly in the material.

[0022] 7. During the discharge process, the mixed material will flow out through the main discharge pipe, which is equipped with two branch pipes. The two branch pipes are controlled by a switching valve. One branch pipe is the discharge pipe and the other is the return pipe, ensuring that the material flowing out of the discharge pipe has excellent purity. Attached Figure Description

[0023] Figure 1 This is an overall assembly structure diagram of the present invention; Figure 2 This is an exploded view of the invention; Figure 3 This is a schematic diagram of the base frame and upright structure of the present invention; Figure 4 This is a structural diagram of the locking mechanism of the present invention; Figure 5 This is a cross-sectional view of the tank body and the discharge component of the present invention; Figure 6 This is a diagram of the internal structure of the tank in its overall assembled state according to the present invention; Figure 7 This is a structural diagram of the stirring device of the present invention; Figure 8 This is a structural diagram of the connecting arm of the present invention; Figure 9 This is a structural diagram of the mixing device of the present invention; Figure 10 This is a structural diagram of the dispersed components of the present invention; In the diagram: 1. Base frame; 11. Vertical frame; 111. Fixed support frame; 112. Side arm; 1121. Locking sleeve; 1122. Sealing motor; 113. Side plate; 1131. Lead screw; 2. Hydraulic cylinder; 20. Guide sleeve; 201. Guide rod; 21. Lifting rod; 22. Extension arm; 221. Fixed platform; 3. Tank body; 30. End cover; 31. Main drain pipe; 311. Discharge pipe; 3111. Screen plate; 312. Return pipe; 3121. 32. Switching valve; 33. Feed inlet; 34. Suspension platform; 4. Moving leg; 5. Top cover; 40. Sealing sleeve; 5. Stirring motor; 51. Main shaft; 52. Fixing block; 53. Connecting arm; 531. Mounting base; 5311. Scraper; 5312. Push plate; 6. Vacuum plate; 61. Vacuum pump; 62. Evacuation pipe; 7. Energy controller; 71. Amplitude rod; 72. Tool head; 8. Mixing motor; 81. Sub-shaft; 811. Gear disc; 82. Screwdriver blade. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example: Please see Figures 1-10 A steel structure fireproof coating production equipment includes: a tank body 3 and a base frame 1, as detailed in the following document. Figure 1 and Figure 2 The bottom of the tank body 3 is provided with a movable leg 34, and the bottom of the movable leg 34 is specifically provided with a universal wheel. By pushing the tank body 3, the movable leg 34 can easily move the tank body 3. The base frame 1 is specifically a support device, and the top of the base frame 1 is provided with a stand 11. The base frame 1 and the stand 11 are set vertically. The tank body 3 is movably set on one side of the base frame 1. After the tank body 3 is fixed, it is close to the side of the stand 11. The stand 11 is provided with a locking mechanism to lock the position of the tank body 3. The locking mechanism can be adaptively adjusted according to the size and shape of the tank body 3.

[0026] Specific reference Figure 3 and Figure 4 The locking mechanism includes a fixed support 111 and side arms 112. The fixed support 111 is located in the middle of the upright 11 and is V-shaped. The two ends of the fixed support 111 abut against the outer wall of the tank 3. As the tank 3 approaches the upright 11, it will first contact the fixed support 111, completing the initial positioning. There are two side arms 112, which are symmetrically arranged on both sides of the upright 11. The end of the side arm 112 is provided with a locking sleeve 1121, and a locking motor 1122 is also provided on the side arm 112. A lead screw 1131 is rotatably embedded in the locking sleeve 1121. A side plate 113 is fixed to the end of the lead screw 1131. The side plate 113 fits against the outer periphery of the tank body 3. The locking motor 1122 is connected to the locking sleeve 1121 by gear transmission. The locking motor 1122 drives the gear to rotate, causing the locking sleeve 1121 to rotate. The lead screw 1131 located in the locking sleeve 1121 is then driven to extend and retract, causing the side plate 113 to press against the outer wall of the tank body 3, thereby achieving adaptive clamping and stable support for tank bodies 3 of different sizes.

[0027] In this embodiment, specific reference is made. Figure 2 and Figure 6The tank body 3 has an end cap 30 at its top, which is the top opening of the tank body 3. The end cap 30 is used to connect to the top cover 4, which is independently set up from the tank body 3. The base frame 1 has a lifting device at its top, which specifically includes a hydraulic cylinder 2 and a lifting rod 21. One end of the lifting rod 21 is connected to the hydraulic cylinder 2, which can drive the lifting rod 21 to move vertically upward or downward. The other end of the lifting rod 21 has an extension arm 22, which is located at the top of the lifting rod 21. The end of the extension arm 22 has a fixing platform 221, which is fixedly connected to the top cover 4. Tanks 3 of different sizes must be fitted with corresponding top covers 4. Before operation, the generated dimensions must be determined. The top cover 4 is fastened to the fixed platform 221. The hydraulic cylinder 2 has a guide sleeve 20 on its side wall and a guide rod 201 at the bottom of the extension wall. The guide rod 201 slides in the guide sleeve 20 during the lifting process to ensure that the lifting process is stable and reliable. The end cover 30 has a sealing sleeve 40 at the bottom. The sealing sleeve 40 fits against the inner circumferential wall of the end cover 30. When the top cover 4 is pressed against the end cover 30, the sealing sleeve 40 will fit tightly against the inner circumference of the end cover 30. The sealing sleeve 40 is made of rubber and plays a sealing role to ensure that the inside of the tank 3 is sealed after the top cover 4 is installed.

[0028] In this embodiment, specific reference is made. Figure 6 The top cover 4 is equipped with a stirring device and a mixing device, both of which extend into the interior of the tank 3. The top cover 4 also has a dispersing component extending into the interior of the tank 3. The stirring device scrapes, pushes, and aggregates the material, while the mixing device mixes and disperses the material. In existing technologies, fire-retardant coatings are typically made by mixing multiple substances. However, insufficient mixing can occur between different flame retardants. For example, ammonium polyphosphate, a common flame retardant, is highly hygroscopic. Even with slight moisture absorption, bridging can easily occur between particles, making dispersion difficult. Conventional stirring equipment can only promote particle rolling but cannot effectively break down their agglomeration structure, ultimately leading to white spots in the coating and uneven distribution of the coating's fire-retardant performance. The dispersing component further vibrates some of the difficult-to-disperse flame retardant particles and, in conjunction with the stirring and mixing devices, ensures thorough mixing, guaranteeing uniform and stable coating performance.

[0029] This embodiment mainly describes the stirring device, which can be found in the following reference. Figure 6 , Figure 7 and Figure 8The stirring device includes a stirring motor 5, a main shaft 51, and a connecting arm 53. The connecting arm 53 is fixed to the end of the main shaft 51. Multiple connecting arms 53 are arranged in a circular pattern on the main shaft 51. Specifically, the connecting arm 53 is L-shaped. The horizontal end of the connecting arm 53 is close to the bottom wall of the tank 3, and the vertical end of the connecting arm 53 is close to the side wall of the inner circumference of the tank 3. The stirring motor 5 is fixed at the center of the top cover 4. The output end of the stirring motor 5 is connected to the main shaft 51, and the main shaft 51 extends vertically downward into the interior of the tank 3. Multiple mounting seats 531 are provided on the connecting arm 53, located at the horizontal and vertical ends of the connecting arm 53 respectively. Multiple scrapers 5311 and multiple pushers 5312 are hinged to the mounting seats 531 respectively. The scrapers 5311 are in close contact with the side and bottom walls of the tank 3. During rotation, the scrapers 5311 and pushers 5312 scrape, push and gather the material. The scrapers 5311 are in close contact with the inner wall of the tank 3, and the pushers 5312 push the material towards the center. The scrapers 5311 and pushers 5312 are staggered, and the hinge axes of the scrapers 5311 and pushers 5312 are perpendicular to each other. Driven by the main shaft 51, the scrapers 5311 and pushers 5312 rotate synchronously. The scrapers 5311 make a circular motion along the inner wall of the tank 3 to continuously remove the attached material; the pushers 5312 gather the material at the edge towards the center.

[0030] This embodiment mainly describes the mixing device, which can be referred to in detail below. Figure 6 and Figure 9 The mixing device includes a mixing motor 8 and a secondary shaft 81. The mixing motor 8 is fixed on one side of the top cover 4. The secondary shaft 81 extends vertically downward into the tank body 3. A toothed disc 811 is installed at the bottom of the secondary shaft 81. The toothed disc 811 is arranged radially and inclined. A screw conveyor blade 82 is provided on the outer periphery of the secondary shaft 81. The toothed disc 811 rotates synchronously with the secondary shaft 81 to perform shearing and convection mixing on the material. The material deposited at the bottom of the screw conveyor blade 82 is continuously lifted to the middle and upper part to achieve efficient mixing.

[0031] In this embodiment, a cross-sectional view of the interior of tank 3 is specifically referred to. Figure 5 and Figure 6Inside the tank 3, near the upper part, there is a suspended platform 33. A vacuum plate 6 is movably mounted on the suspended platform 33. A fixing block 52 is mounted on the main shaft 51, and the fixing block 52 matches the vacuum plate 6. The vacuum plate 6 divides the inside of the tank 3 into a buffer zone and a stirring zone. By setting the vacuum plate 6, the vacuum plate 6 is engaged with the suspended platform 33. The vacuum plate 6 descends with the lifting rod 21 and is driven by the fixing block 52 on the main shaft 51. When the top cover 4 is in the downward state, the connecting arm 53, the toothed disc 811, and the tool head 72 will first enter the tank 3, followed by the vacuum plate 6. At this time, the vacuum plate 6 is supported by the top of the fixing platform 221 and continues to descend on the main shaft 51. After the vacuum plate 6 reaches the suspended platform 33, it stops moving. The main shaft 51, the auxiliary shaft 81, and the tool head 72 continue to descend until they reach the mixing machine position. When it is necessary to replace the tank 3 or open the top cover 4, the top cover 4 is in the downward state, and the main shaft 51 continuously rises during the continuous upward movement. During the ascent, the top of the fixed block 52 contacts the bottom of the vacuum plate 6, causing the vacuum plate 6 to rise synchronously. The vacuum plate 6 then detaches from the suspension platform 33 and is lifted.

[0032] During intense shearing operations on materials, a significant amount of air inevitably gets trapped in the coating. In the case of fire-retardant coatings, tiny air bubbles in the finished product can affect the coating's density and may even cause surface defects when heated and expanding. In a vacuum environment, the boiling point of the liquid decreases, and the microbubbles trapped in the material rapidly expand and burst, resulting in a bubble-free, high-quality coating. The internal space of the original single tank 3 is divided into two independent chambers—a stirring zone and a buffer zone—using a vacuum plate 6. The stirring zone is larger and located at the lower part of the tank 3, while the buffer zone is smaller and located at the upper part. The stirring zone and buffer zone significantly improve the purity of the material during mixing. The main shaft 51, secondary shaft 81, and tool head 72 pass through the vacuum plate 6, inevitably creating tiny gaps at the sealing interface. The buffer zone ensures the airtightness of the tank 3.

[0033] Another function of the vacuum plate 6 is to prevent materials in the mixing zone from splashing to the bottom of the top cover 4, thus avoiding material accumulation on the inner wall of the top cover 4, which could lead to secondary pollution or affect the sealing performance.

[0034] In this embodiment, the dispersing component is specifically described. See details below. Figure 1 and Figure 10The dispersing component mainly consists of a power controller 7, an amplitude transformer 71, and a tool head 72. The power controller 7 is mounted on the side arm 112, while the amplitude transformer 71 is fixed to the top cover 4. The power controller 7 and the amplitude transformer 71 are electrically connected via a cable. The bottom end of the amplitude transformer 71 is firmly connected to the tool head 72, which extends into the interior of the tank 3. This dispersing component can apply further vibration to some difficult-to-disperse flame retardant particles. After the power controller 7 is activated, the power and frequency of the amplitude transformer 71 can be adjusted, thereby driving the tool head 72 to generate high-frequency vibration. This vibration promotes the complete decomposition of some agglomerated particles in the flame retardant and their uniform distribution within the material.

[0035] In this embodiment, in the prior art, the mixed material is usually discharged directly for use, and even with a screening and filtration device, effective recycling is still difficult to achieve. See details... Figure 5 and Figure 6 The tank body 3 has several inlets 32 on one side and a discharge component installed at the bottom. The discharge component includes a main drain pipe 31, a discharge pipe 311, and a return pipe 312: the main drain pipe 31 is connected to the bottom of the tank body 3, and its ends are connected to the discharge pipe 311 and the return pipe 312 respectively; the other end of the return pipe 312 extends and penetrates the side wall of the tank body 3, and is connected to the stirring zone. A sieve plate 3111 is integrated inside the main drain pipe 31, and a handle is provided on one side of it. The handle extends and is connected to the sieve plate 3111. By adjusting the handle, the sieve plate 3111 can be driven to rotate, thereby controlling its opening and closing angle. A switching valve 3121 is provided between the discharge pipe 311 and the return pipe 312 to regulate the material flow direction. In the discharge state, the switching valve 3121 closes the return pipe 312, and the sieve plate 3111 maintains normal screening function; when backflow is required, the switching valve 3121 closes the discharge pipe 311, and at the same time, the operating handle is rotated to open the sieve plate 3111, so that the intercepted material that does not meet the usage standards is returned to the mixing zone for further processing.

[0036] A method for producing fire-retardant coating for steel structures includes the following steps: S1. Fixed position: By pushing the tank 3, the moving leg 34 moves the tank 3 closer to the base frame 1. The tank 3 moves closer to the base frame 1, and the outer periphery of the tank 3 abuts against the fixed support 111. The position is initially positioned, and the tank 3 is located between the side arms 112. The locking motor 1122 is started. The locking motor 1122 drives the gear to rotate, causing the locking sleeve 1121 to rotate. The lead screw 1131 then drives the side plate 113 to press against the outer wall of the tank 3. The side plate 113 and the fixed support 111 firmly lock the tank 3 in the predetermined position of the base frame 1. S2, Preparation for mixing: Multiple feed ports 32 are connected to flame retardants of different components. The flame retardants are fed into the tank 3 through the feed ports 32 and fall naturally under the action of gravity. The hydraulic cylinder 2 drives the lifting rod 21 to move downward, which in turn moves the extension arm 22 and the top cover 4 downward simultaneously. The vacuum plate 6 is suspended on the top of the fixed block 52. During the downward movement of the lifting rod 21, the vacuum plate 6 stops sliding when it reaches the suspension platform 33. The main shaft 51, the secondary shaft 81, and the tool head 72 continue to move downward until the sleeve 40 and the end cover 30 are in contact. At this time, the stirring zone and the buffer zone form a sealed cavity. The vacuum pump 61 is started, and the air extraction pipe 62 extracts the air from the stirring zone, reducing the air pressure inside the stirring zone to the set vacuum level. S3. Thorough mixing: The stirring motor 5 starts, the main shaft 51 rotates, and the scraper 5311 and pusher 5312 on the connecting arm 53 rotate accordingly. The scraper 5311 scrapes off the material attached to the inner wall of the tank 3, and the pusher 5312 pushes the material towards the center. When the mixing motor 8 starts, the secondary shaft 81 rotates and the toothed disc 811 rotates, so that the material is fully mixed. During the mixing process, the auger blade 82 rotates with the secondary shaft 81, lifting the material at the bottom of the tank 3 upward. When the energy controller 7 is activated, it adjusts the power and frequency of the amplitude transformer 71, causing the tool head 72 to vibrate at high frequency. The high-frequency vibration of the tool head 72 causes the flame retardant to be finely dispersed. S4. Discharge and subsequent processing: The mixed material enters the main discharge pipe 31, is filtered by the sieve plate 3111, and then enters the discharge pipe 311. The material discharged from the discharge pipe 311 is fire-retardant coating that meets the standards. The sieve plate 3111 intercepts materials that do not conform to the sieve plate 3111 aperture. The switching valve 3121 switches to the return pipe 312, and the sieve plate 3111 opens, allowing the intercepted material to return to the mixing zone from the return pipe 312 to participate in the mixing again, realizing particle size classification control and circulating homogenization treatment.

[0037] The principle of this invention is as follows: by separating the tank body 3 from the top cover 4 and combining multiple devices in a coordinated manner, efficient production of fire-retardant coatings for steel structures can be achieved. The bottom of the tank body 3 is equipped with movable legs 34, allowing it to be flexibly moved to the side of the base frame 1 and fixed in position by a locking mechanism on the upright frame 11, thus improving the equipment's adaptability. The top cover 4 is driven to rise and fall by a hydraulic cylinder 2, and its integrated stirring device, mixing device, and dispersing components can operate deep inside the tank body 3.

[0038] During operation, flame retardant is first injected through inlet 32. Top cover 4 is pressed down to make the sleeve 40 fit with end cover 30. Vacuum pump 61 extracts air from the mixing zone to create a vacuum environment and inhibit material oxidation. Then, stirring motor 5 drives main shaft 51 to rotate. Scraper 5311 on connecting arm 53 scrapes material from the tank wall, and pusher 5312 gathers material towards the center. Mixing motor 8 drives secondary shaft 81 to rotate. Toothed disc 811 shears the mixture, and auger 82 lifts material from the bottom to achieve up-and-down circulation mixing. Tool head 72 of dispersing component generates high-frequency vibration to break up flame retardant agglomerates and ensure uniform dispersion.

[0039] After mixing, the material flows out through the main drain pipe 31. The coating that meets the standard is filtered out by the sieve plate 3111 and discharged through the discharge pipe 311. The unqualified material is returned to the mixing zone through the return pipe 312 for remixing, realizing cyclic homogenization treatment and ensuring stable product quality. The entire process is carried out in a vacuum environment, which effectively avoids the generation of air bubbles and improves the density and fire resistance of the coating.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel structure fireproof coating production equipment, comprising a tank body (3) and a base frame (1), the tank body (3) is provided with a movable leg (34) at the bottom, and the tank body (3) is movably arranged on one side of the base frame (1), characterized in that: The base frame (1) is provided with a support frame (11) at the top, and a locking mechanism is provided on the support frame (11) to lock the position of the tank body (3); the tank body (3) is provided with an end cap (30) at the top, and a detachable top cap (4) is provided on the top of the end cap (30); The top of the base frame (1) is provided with a lifting device, which specifically includes a hydraulic cylinder (2) and a lifting rod (21). One end of the lifting rod (21) is connected to the hydraulic cylinder (2), and the other end of the lifting rod (21) is provided with an extension arm (22). The end of the extension arm (22) is provided with a fixed platform (221), and the fixed platform (221) is fixedly connected to the top cover (4). The top cover (4) is equipped with a stirring device and a mixing device, both of which extend into the tank body (3). The top cover (4) is also equipped with a dispersing component, which extends into the tank body (3). The tank body (3) has several feed inlets (32) on one side and a discharge component at the bottom of the tank body (3). The discharge component includes a main drain pipe (31), a discharge pipe (311) and a return pipe (312). The main drain pipe (31) is connected to the bottom of the tank body (3), and the end of the main drain pipe (31) is connected to the discharge pipe (311) and the return pipe (312) respectively.

2. The steel structure fireproof coating production equipment according to claim 1, characterized in that: The locking mechanism includes a fixed support (111) and a side arm (112). The fixed support (111) is located in the middle of the upright (11). The side arms (112) are symmetrically arranged on both sides of the upright (11). The end of the side arm (112) is provided with a locking sleeve (1121). The side arm (112) is provided with a locking motor (1122). The locking sleeve (1121) is rotatably embedded with a lead screw (1131). The end of the lead screw (1131) is fixed with a side plate (113). The locking motor (1122) is connected to the locking sleeve (1121) by gear transmission. The locking motor (1122) drives the gear to rotate, causing the lead screw (1131) to rotate and drive the side plate (113) to press against the outer wall of the tank (3).

3. The steel structure fireproof coating production equipment according to claim 2, characterized in that: The stirring device includes a stirring motor (5), a main shaft (51) and a connecting arm (53). The stirring motor (5) is fixed at the center of the top cover (4). The output end of the stirring motor (5) is connected to the main shaft (51). The main shaft (51) extends vertically downward into the tank (3). The connecting arm (53) is fixed at the end of the main shaft (51). The connecting arm (53) is provided with multiple mounting seats (531), and multiple mounting seats (531) are respectively hinged with multiple scrapers (5311) and multiple push plates (5312). The multiple scrapers (5311) are in close contact with the side wall and bottom wall of the tank body (3).

4. The steel structure fireproof coating production equipment according to claim 3, characterized in that: The mixing device includes a mixing motor (8) and a secondary shaft (81). The mixing motor (8) is fixed on one side of the top cover (4). The secondary shaft (81) extends vertically downward into the tank body (3). A toothed disc (811) is installed at the bottom of the secondary shaft (81), and an auger plate (82) is provided on the outer periphery of the secondary shaft (81).

5. The steel structure fireproof coating production equipment according to claim 4, characterized in that: The tank (3) has a suspension platform (33) located at the upper part of its interior. A vacuum plate (6) is movably mounted on the suspension platform (33). A fixing block (52) is mounted on the main shaft (51). The fixing block (52) matches the vacuum plate (6). The vacuum plate (6) divides the interior of the tank (3) into a buffer zone and a stirring zone. The end cap (30) is provided with a cover (40) at the bottom, and the cover (40) fits against the inner peripheral wall of the end cap (30). A vacuum device is provided on the outside of the tank (3). The vacuum device includes a vacuum pump (61) and a suction pipe (62). The vacuum pump (61) is fixed on the outer wall of the tank (3). The output end of the vacuum pump (61) is connected to the suction pipe (62). One end of the suction pipe (62) passes through the side wall of the tank (3) and is connected to the stirring zone.

6. The steel structure fireproof coating production equipment according to claim 5, characterized in that: The dispersing components include a controller (7), an amplitude transformer (71), and a tool head (72). The controller (7) is mounted on the side arm (112), the amplitude transformer (71) is mounted on the top cover (4), the controller (7) and the amplitude transformer (71) are electrically connected, the bottom end of the amplitude transformer (71) is fixedly connected to the tool head (72), and the tool head (72) extends into the tank body (3).

7. The steel structure fireproof coating production equipment according to claim 1, characterized in that: The main drain pipe (31) has a built-in screen plate (3111). A handle is provided on one side of the main drain pipe (31). The handle extends and connects to the screen plate (3111). The handle can adjust the rotation of the screen plate (3111) to adjust the opening and closing angle of the screen plate (3111). A switching valve (3121) is provided between the discharge pipe (311) and the return pipe (312). The switching valve (3121) can adjust the discharge flow direction. The other end of the return pipe (312) extends through the side wall of the tank (3) and connects to the stirring zone.

8. The steel structure fireproof coating production equipment according to claim 7, characterized in that: The fixed support (111) is V-shaped and abuts against the outer wall of the tank (3). The hydraulic cylinder (2) has a guide sleeve (20) on its side wall and a guide rod (201) at the bottom of the extension wall. The guide rod (201) and the guide sleeve (20) slide together.

9. A method for producing fire-retardant coatings for steel structures, characterized in that, The steel structure fireproof coating production equipment described in claim 7 includes the following steps: S1. Fixed position: By pushing the tank (3), the moving leg (34) moves closer to the base frame (1) along with the tank (3). The tank (3) moves closer to the base frame (1) and the outer periphery of the tank (3) abuts against the fixed support (111). The position is initially positioned and the tank (3) is located between the side arms (112). The locking motor (1122) starts and drives the gear to rotate, causing the locking sleeve (1121) to rotate. The screw (1131) then drives the side plate (113) to press against the outer wall of the tank (3). The side plate (113) and the fixed support (111) firmly lock the tank (3) in the predetermined position of the base frame (1). S2, Preparation for mixing: Multiple feed ports (32) are connected to flame retardants of different components. The flame retardants are fed into the tank (3) through the feed ports (32) and fall naturally under the action of gravity. The hydraulic cylinder (2) drives the lifting rod (21) to move downward, which in turn drives the extension arm (22) and the top cover (4) to move downward simultaneously. The vacuum plate (6) is suspended on the top of the fixed block (52). During the downward movement of the lifting rod (21), the vacuum plate (6) stops sliding when it reaches the suspension platform (33). The main shaft (51), the secondary shaft (81), and the tool head (72) continue to move downward until the sleeve (40) and the end cover (30) are in contact. At this time, the stirring zone and the buffer zone form a sealed cavity. The vacuum pump (61) is started, and the air extraction pipe (62) extracts the air in the stirring zone, reducing the air pressure inside the stirring zone to the set vacuum level. S3. Thorough mixing: The stirring motor (5) starts, the main shaft (51) rotates, and the scraper (5311) and pusher (5312) on the connecting arm (53) rotate accordingly. The scraper (5311) scrapes off the material attached to the inner wall of the tank (3), and the pusher (5312) pushes the material toward the center. The mixing motor (8) starts, the secondary shaft (81) rotates, and the toothed disc (811) rotates to fully mix the materials. During the mixing process, the auger blades (82) rotate with the secondary shaft (81) to lift the materials at the bottom of the tank (3) upward. The energy controller (7) is activated, and the power and frequency of the amplitude rod (71) are adjusted to make the tool head (72) vibrate at high frequency. The high frequency vibration of the tool head (72) causes the flame retardant to be finely dispersed. S4. Discharge and subsequent processing: The mixed material enters the main discharge pipe (31), is filtered by the sieve plate (3111), and then enters the discharge pipe (311). The material discharged from the discharge pipe (311) is fire-retardant coating that meets the standards. The sieve plate (3111) intercepts the material that does not conform to the aperture of the sieve plate (3111). The switching valve (3121) switches to the return pipe (312), and the sieve plate (3111) opens, so that the intercepted material returns from the return pipe (312) to the mixing zone to participate in the mixing again, realizing particle size classification control and circulating homogenization treatment.

Images