Steel structure fireproof coating spraying device with mixing and homogenizing nozzles

Abstract

The utility model relates to a steel structure fireproof coating spraying device with a mixing and homogenizing nozzle. The steel structure fireproof coating spraying device comprises an air channel, a coating channel and a nozzle, one end of the air channel and one end of the coating channel are simultaneously communicated with the sprayer, the other end of the air channel is communicated with the external environment, the other end of the coating channel is communicated with the material barrel, the sprayer comprises a feeding cavity and a nozzle, the feeding cavity is communicated with the coating channel, a stirring part is arranged in the feeding cavity, the nozzle is arranged at the outlet end of the feeding cavity, and a spraying hole is formed in the nozzle. The nozzle is conical, a plurality of wedge-shaped grooves are radially formed in the periphery of the inner wall of the nozzle, and the interior of each wedge-shaped groove is sequentially divided into a plurality of layers of micro-structure inclined grooves from bottom to top through fold faces. According to the steel structure fireproof coating spraying device with the mixing and homogenizing spray nozzle, the radial wedge-shaped grooves are designed in the inner wall of the spray nozzle, and the spray nozzle is integrated with the feeding cavity and the special stirring part, so that the dispersing and homogenizing effect on the coating is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure coating spraying, in particular to a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle. Background Art

[0002] With the rapid development of the construction industry, especially the increase in high-rise buildings and large infrastructure projects, steel structures are widely used due to their high strength and lightweight characteristics. However, the fire resistance of steel structures is relatively weak. Once a fire occurs, it may quickly lose its bearing capacity, causing serious consequences. Therefore, the application of steel structure fire retardant coatings has become one of the key measures to ensure building fire safety. This type of coating can expand at high temperatures to form a heat-insulating protective layer, delaying the temperature rise of steel, thereby buying precious time for personnel evacuation and fire extinguishing.

[0003] Although the application of steel structure fire retardant coatings is becoming more and more widespread, there are still many challenges in the actual construction process: 1. Spraying uniformity: Traditional spraying equipment is difficult to ensure the uniform distribution of coatings on the surface of complex structures, affecting the stability of fire retardant performance.

[0004] 2. Mixing efficiency: Fire retardant coatings often contain multiple ingredients, including flame retardants, binders, etc., which need to be fully mixed to achieve optimal performance, but the mixing effect of existing equipment is limited.

[0005] 3. Construction efficiency and cost: Manual or inefficient spraying methods are not only time-consuming, but may also cause material waste and increase construction costs. Utility Model Content

[0006] The utility model aims to provide a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle, aiming to facilitate improving the mixing uniformity of the coating before spraying.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle, comprising an air channel, a coating channel and a nozzle; the air channel is connected to one end of the coating channel and is also connected to the nozzle, the other end of the air channel is connected to the external environment, and the other end of the coating channel is connected to a material barrel;

[0008] The nozzle includes a feed chamber and a nozzle, the feed chamber is connected with the air channel and one end of the paint channel, a stirring part for homogenizing the paint is arranged in the feed chamber, the nozzle is arranged at the outlet end of the feed chamber, a spray hole connecting the feed chamber and the external space is arranged on the nozzle, the paint in the feed chamber enters the nozzle through the outlet end, and is sprayed out from the spray hole;

[0009] The nozzle is set to be conical, and a plurality of wedge-shaped grooves are radially arranged around the inner wall of the nozzle. Each of the wedge-shaped grooves is divided into multiple layers of microstructured oblique grooves from bottom to top by pleated surfaces. The bottom surface of the oblique groove of each layer of the microstructured oblique groove is an inclined surface with a lower edge higher than an upper edge, and the microstructured oblique grooves of each layer sequentially form a structural relationship of spreading layer by layer.

[0010] Furthermore, the stirring portion includes a stirring rod and a driving portion that drives the stirring rod to rotate. A partition chamber is provided outside the feed chamber, and the partition chamber is connected to the feed chamber through a through hole. The driving portion is provided in the partition chamber and can enter the feed chamber through the through hole. One end of the stirring rod is rotatably provided in the feed chamber, and the other end of the stirring rod is located in the nozzle.

[0011] Furthermore, the center of the stirring rod and the spray hole are located on the same axis.

[0012] Furthermore, the stirring rod is rotatably arranged in the feed chamber through a bracket, and a cleaning piece capable of cleaning one side of the bracket is provided on one side of the stirring rod passing through the bracket.

[0013] Furthermore, the cleaning member includes a scraper, which is arranged at the end of the stirring rod and is located between the bracket and the driving part.

[0014] Furthermore, the stirring rod includes a stirring shaft and a spiral cutter, and the spiral cutter is arranged in a progressive manner along the axial direction of the stirring shaft.

[0015] Furthermore, the diameter of the spiral cutter is gradually reduced in the direction toward the spray hole.

[0016] Furthermore, the driving part includes a driving motor and a transmission gear set, and the transmission gear set includes two bevel gears meshing with each other, one of the bevel gears is connected to the stirring rod, and the other bevel gear is connected to the driving motor.

[0017] Furthermore, the driving unit also includes a reduction transmission gear set, which is arranged between the driving motor and the transmission gear set, and the reduction transmission gear set includes gear 1 and gear 2 that are meshed and connected, the gear 1 is connected to the other bevel gear, and the gear 2 is connected to the power output end of the driving motor.

[0018] Furthermore, a switch for controlling the start and stop of the drive motor is slidably provided on the partition cavity.

[0019] The beneficial effects of a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle provided by the utility model are:

[0020] Compared with the prior art, the utility model is a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle, and the nozzle design in the device integrates a feed chamber and a special stirring part to ensure that the coating can be fully mixed and homogenized before entering the nozzle.

[0021] The nozzle adopts a conical design, which helps to form a stable airflow and paint flow during the spraying process, improving the accuracy and coverage of the spray. The conical structure can also reduce the rebound phenomenon during the spraying process, allowing the paint to adhere to the target surface more effectively. The radial wedge-shaped grooves on the inner wall of the nozzle and the micro-structured bevel grooves therein further enhance the dispersion effect of the paint, making the sprayed paint atomized more delicately and evenly, helping to form a smooth and continuous coating.

[0022] The bottom surface of each layer of microstructured trough is designed with the lower edge higher than the upper edge. This inclined structure helps accelerate the paint as it passes through, and forms an effective kinetic energy conversion between each layer, promoting further refinement of paint particles. This layer-by-layer spreading structure not only improves the atomization quality of the paint, but also helps control the spray pattern to achieve better spraying efficiency and coverage.

[0023] Overall, this design can significantly improve the construction efficiency of fire retardant coatings and the quality of the final coating by optimizing the mixing, homogenization and spraying process of the coating. It reduces coating waste and ensures the uniformity and thickness of the coating, which is crucial to improving the fire resistance of steel structures and also meets the requirements of modern construction that is efficient and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the overall structure of a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle provided in an embodiment of the utility model;

[0026] Figure 2 Figure 1 Bottom view of the state;

[0027] Figure 3 A schematic diagram of the structure of a nozzle provided in an embodiment of the utility model;

[0028] Figure 4 An assembly diagram of a driving part and a stirring rod provided in an embodiment of the utility model;

[0029] Figure 5 An assembly diagram of the stirring rod and the feeding chamber provided in the embodiment of the utility model;

[0030] Figure 6 A schematic structural diagram of a pressure plate provided in an embodiment of the utility model.

[0031] In the figure: 1. nozzle; 11. feed chamber; 111. conveying pipe; 12. nozzle; 121. spray hole; 122. wedge-shaped groove; 1221. microstructured inclined groove; 13. partition chamber; 2. stirring rod; 21. stirring shaft; 22. spiral cutter; 3. driving part; 31. driving motor; 32. bevel gear; 33. gear one; 34. gear two; 4. switch; 41. pressure plate; 411. bending part; 42. support plate; 43. spring; 5. bracket; 6. scraper. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this embodiment more clearly understood, this embodiment is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this embodiment and are not used to limit this embodiment.

[0033] Please also read Figures 1 to 6 , a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle 12 provided in this embodiment is now described. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle 12 in this embodiment. Among them, the spraying device includes an air channel, a coating channel and a nozzle 1; the air channel is connected to one end of the coating channel and is also connected to the nozzle 1, the other end of the air channel is connected to the external environment, and the other end of the coating channel is connected to the material barrel.

[0034] Preferably, the nozzle 1 includes a feed chamber 11 and a nozzle 12. The feed chamber 11 is connected to one end of the air channel and the paint channel, and a stirring portion for homogenizing the paint is provided in the feed chamber 11. The nozzle 12 is provided at the outlet end of the feed chamber 11. A spray hole 121 connecting the feed chamber 11 and the external space is provided on the nozzle 12. The paint in the feed chamber 11 enters the nozzle 12 through the outlet end and is sprayed out from the spray hole 121.

[0035] A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle 12 in this embodiment, such as Figure 1 As shown, the spray head 1 in the device is designed to integrate a feed chamber 11 and a special stirring part to ensure that the paint can be fully mixed and homogenized before entering the nozzle 12.

[0036] In addition, the nozzle 12 is set to be conical, and a plurality of wedge-shaped grooves 122 are radially arranged around the inner wall of the nozzle 12. Each wedge-shaped groove 122 is sequentially divided into multiple layers of microstructured inclined grooves 1221 by pleats from bottom to top. The bottom surface of each layer of microstructured inclined grooves 1221 is an inclined surface with a lower edge higher than an upper edge, and each layer of microstructured inclined grooves 1221 sequentially forms a structural relationship of layer-by-layer spreading.

[0037] It is worth noting that setting the nozzle 12 in a conical shape helps to form a stable airflow and paint flow during the spraying process, improve the accuracy and coverage of the spray. The conical structure can also reduce the rebound phenomenon during the spraying process, so that the paint adheres to the target surface more effectively.

[0038] Reference Figure 2 and Figure 3 As shown in the figure, a plurality of wedge-shaped grooves 122 are formed on the inner wall of the nozzle 12. The wedge-shaped grooves 122 are designed to imitate the structure of a pitcher plant, and utilize the surface structure of the mouth edge of the pitcher plant to enable it to have the characteristics of directional liquid transportation, so as to guide the directional movement of the coating, so that the coating is more evenly distributed on the inner wall of the nozzle 12, and the coating is prevented from accumulating in the nozzle 12 and affecting the spraying efficiency of the nozzle 12.

[0039] In addition, in this embodiment, in order to improve the homogenization degree of the coating, preferably, a stirring portion is provided in the feed chamber 11 to stir and homogenize the coating entering the nozzle 12 in advance. Figure 4 and Figure 5 As shown in the figure, as a specific preferred embodiment, the stirring part includes a stirring rod 2 and a driving part 3 for driving the stirring rod 2 to rotate. A partition cavity 13 with four sides closed is arranged on one side of the outer periphery of the feeding cavity 11, and the partition cavity 13 is connected with the feeding cavity 11 through a through hole. The driving part 3 is arranged in the partition cavity 13 and can enter the feeding cavity 11 through the through hole. One end of the stirring rod 2 is rotatably arranged in the feeding cavity 11, and the other end of the stirring rod 2 is located in the nozzle 12 and is located on the same axis as the spray hole 121.

[0040] Preferably, the stirring rod 2 is rotatably arranged in the feed chamber 11 through the bracket 5. As shown in the figure, the bracket 5 is a rod with an annular through hole in the middle. Both ends of the bracket 5 are fixed on the inner wall of the feed chamber 11. The stirring rod 2 passes through the annular through hole and is connected to the bracket 5. The stirring rod 2 can rotate relative to the bracket 5 to ensure that the stirring rod 2 rotates stably in the feed chamber 11, directly acting on the paint, thereby improving the mixing effect.

[0041] As a specific preferred embodiment, refer to Figure 4 and Figure 5As shown in the figure, the stirring rod 2 includes a stirring shaft 21 and a spiral cutter 22, and the spiral cutter 22 is arranged progressively along the axial direction of the stirring shaft 21. The stirring shaft 21 and the spray hole 121 are located on the same axis, so that the spiral cutter 22 drives the paint to move along the stirring shaft 21, and then smoothly transports it to the spray hole 121 for spraying out.

[0042] Preferably, the diameter of the spiral cutter 22 is gradually reduced in the direction toward the spray hole 121. This helps to generate stronger shear force during the stirring process, further refine the paint particles, and ensure that the paint reaches a high degree of homogenization before entering the nozzle 12. The gradual diameter design also helps to guide the paint to flow smoothly, reduce resistance, and improve overall efficiency.

[0043] In addition, since the support 5 is located between the feed chamber 11 and the nozzle 12, when the paint passes through the support 5 and enters the nozzle 12, some paint will inevitably remain on the support 5. In this regard, in this embodiment, a cleaning member capable of cleaning one side of the support 5 is provided on the side of the stirring rod 2 passing through the support 5. As a specific preferred embodiment, Figure 6 As shown, the cleaning member includes a scraper 6, which is arranged at the end of the stirring rod 2, and the scraper 6 is located between the bracket 5 and the driving part 3. When the stirring rod 2 rotates relative to the bracket 5, the scraper 6 located at the end of the stirring rod 2 can also rotate, so as to clean the side of the bracket 5 facing the feeding chamber 11.

[0044] In this embodiment, a partition cavity 13 is provided outside the feed cavity 11, the partition cavity 13 is connected with the feed cavity 11 through a through hole, and the driving part 3 is provided in the partition cavity 13 and can enter the feed cavity 11 through the through hole. By providing the driving part 3 in the partition cavity 13, the driving part 3 can be separated from the feed bin, so as to facilitate the protection of the driving part 3 and avoid affecting the normal use of the driving part 3.

[0045] As a preferred example, Figure 4 As shown, the driving part 3 includes a driving motor 31 and a transmission gear set. A delivery pipe 111 is arranged in the feed chamber 11. One end of the delivery pipe 111 is connected to the nozzle 12. The other end of the delivery pipe 111 is connected to the partition chamber 13 through a through hole. The transmission gear set is arranged in the delivery pipe 111. Among them, the transmission gear set includes two bevel gears 32 meshing with each other, one bevel gear 32 is connected to the stirring rod 2, and the other bevel gear 32 is connected to the driving motor 31. The power of the driving motor 31 is transmitted to the stirring rod 2 through the two bevel gears 32, so as to realize the precise control of the stirring rod 2, which reflects the mechanical automation level of the device; at the same time, the component structure is simple and easy to arrange, and the product is mature, and the cost of design and processing is low.

[0046] And as a preferred embodiment, still refer to Figure 4As shown, the driving part 3 also includes a reduction transmission gear set, which is arranged between the driving motor 31 and the transmission gear set, and the reduction transmission gear set includes a gear 1 33 and a gear 2 34 that are meshed and connected, the gear 1 33 is connected to another bevel gear 32, and the gear 2 34 is connected to the power output end of the driving motor 31. The size of the gear 1 33 is larger than that of the gear 2 34. When the driving motor 31 drives the gear 2 34 to rotate, the meshing process between the gear 2 34 and the gear 1 33 will achieve the purpose of speed reduction, so as to ensure that the stirring speed of the stirring rod 2 will not be too fast, which will affect the smooth progress of the stirring process.

[0047] In addition, in order to facilitate the control of the operator, in this embodiment, as a preferred embodiment, a switch 4 for controlling the start and stop of the drive motor 31 is slidably provided on the partition chamber 13. The switch 4 is connected to the drive motor 31, and can realize the instant start and stop control of the stirring function, which not only improves the convenience of operation, but also facilitates the adjustment of the mixing state of the paint according to the spraying requirements.

[0048] As a preferred embodiment, Figure 1 and Figure 6 As shown, the switch 4 includes a pressing plate 41 connected to the start button of the driving motor 31, and a support plate 42 rotatably connected to the pressing plate 41 is provided on the outer peripheral wall of the feeding chamber 11. The pressing plate 41 is L-shaped, and the bending portion 411 of the pressing plate 41 is connected to the driving motor 31, and the bending portion 411 can rotate relative to the main body of the pressing plate 41. One end of the pressing plate 41 away from the driving motor 31 extends out from the partition chamber 13, and a spring 43 is provided between the pressing plate 41 and the outer peripheral wall of the feeding chamber 11. When the external pressure presses the pressing plate 41 downward, the end of the pressing plate 41 away from the spring 43 is lifted upward and the driving motor 31 is started at the same time. When the external pressure is removed, the pressing plate 41 is lifted back to its original position under the action of the spring 43, and the driving motor 31 is turned off when the end of the pressing plate 41 away from the spring 43 is pressed downward.

[0049] The present embodiment is a steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle 12. When in use, the start and stop of the driving motor 31 is controlled by the switch 4. After starting, the driving motor 31 controls the rotation of gear 1 33. The meshing of gear 1 33 and gear 2 34 transmits power to the stirring rod 2. When the stirring shaft 21 rotates, the spiral cutter 22 rotates in one direction, which can bring the coating in the feed chamber 11 into the nozzle 12, and at the same time stir and crush the coating to make the coating more uniform, and finally spray it out along the spray hole 121.

[0050] In the spraying device of this embodiment, a wedge-shaped groove 122 is provided on the inner surface of the nozzle 12. The structure of the wedge-shaped groove 122 has the effect of directional conveying of paint, which can effectively avoid the accumulation of paint in the nozzle 12, and the wedge-shaped groove 122 also has the function of dispersing the paint. Combined with the stirring of the spiral cutter 22, it can help to better improve the stirring and homogenizing effect of the paint, thereby improving the overall spraying efficiency and quality of the spraying device.

[0051] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12), comprising an air channel, a coating channel and a nozzle (1); the air channel is connected to one end of the coating channel and is also connected to the nozzle (1), the other end of the air channel is connected to the external environment, and the other end of the coating channel is connected to a material barrel; characterized in that: The spray head (1) comprises a feed chamber (11) and a nozzle (12); the feed chamber (11) is connected to the air channel and one end of the paint channel; a stirring portion for homogenizing the paint is arranged in the feed chamber (11); the nozzle (12) is arranged at the outlet end of the feed chamber (11); a spray hole (121) connecting the feed chamber (11) and an external space is arranged on the nozzle (12); the paint in the feed chamber (11) enters the nozzle (12) through the outlet end and is sprayed out from the spray hole (121); The nozzle (12) is configured to be conical, and a plurality of wedge-shaped grooves (122) are radially arranged around the inner wall of the nozzle (12), and each of the wedge-shaped grooves (122) is sequentially divided into multiple layers of microstructured oblique grooves (1221) from bottom to top by pleated surfaces; the bottom surface of each layer of the microstructured oblique grooves (1221) is an inclined surface with a lower edge higher than an upper edge, and each layer of the microstructured oblique grooves (1221) sequentially forms a structural relationship of spreading layer by layer.

2. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 1, characterized in that: The stirring portion comprises a stirring rod (2) and a driving portion (3) for driving the stirring rod (2) to rotate; a partition chamber (13) is arranged outside the feed chamber (11); the partition chamber (13) is connected to the feed chamber (11) via a through hole; the driving portion (3) is arranged in the partition chamber (13) and can enter the feed chamber (11) through the through hole; one end of the stirring rod (2) is rotatably arranged in the feed chamber (11); and the other end of the stirring rod (2) is located in the nozzle (12).

3. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 2, characterized in that: The center of the stirring rod (2) and the center of the spray hole (121) are located on the same axis.

4. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 3, characterized in that: The stirring rod (2) is rotatably arranged in the feed chamber (11) via a bracket (5), and a cleaning piece capable of cleaning one side of the bracket (5) is provided on the side of the stirring rod (2) passing through the bracket (5).

5. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 4, characterized in that: The cleaning member comprises a scraper (6), the scraper (6) being arranged at the end of the stirring rod (2), and the scraper (6) being located between the bracket (5) and the driving part (3).

6. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 2, characterized in that: The stirring rod (2) comprises a stirring shaft (21) and a spiral cutter (22), wherein the spiral cutter (22) is arranged in a progressive manner and surrounds the axial direction of the stirring shaft (21).

7. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 6, characterized in that: The diameter of the spiral cutter (22) is gradually reduced in the direction toward the spray hole (121).

8. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 2, characterized in that: The driving part (3) comprises a driving motor (31) and a transmission gear set, wherein the transmission gear set comprises two bevel gears (32) meshing with each other, one of the bevel gears (32) being connected to the stirring rod (2), and the other bevel gear (32) being connected to the driving motor (31).

9. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 8, characterized in that: The driving part (3) further comprises a reduction transmission gear set, wherein the reduction transmission gear set is arranged between the driving motor (31) and the transmission gear set, and the reduction transmission gear set comprises a meshingly connected gear 1 (33) and a gear 2 (34), wherein the gear 1 (33) is connected to the other bevel gear (32), and the gear 2 (34) is connected to the power output end of the driving motor (31).

10. A steel structure fire retardant coating spraying device with a mixing and homogenizing nozzle (12) according to claim 8, characterized in that: A switch (4) for controlling the start and stop of the drive motor (31) is slidably provided on the partition cavity (13).

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