A spraying device and method for an anti-cracking waterproofing agent

Abstract

The application relates to a spraying device and method of anti-crack waterproof agent. The spraying device comprises an outer shell, an air inlet pipe and a mixing assembly. The air inlet pipe is arranged on the outer shell and extends into the outer shell. The mixing assembly is rotatably arranged in the outer shell and is connected with the air inlet pipe. The air inlet pipe is also connected with a feeding pipe. The air inlet pipe can be connected with an air source to mix the air from the air source and the anti-crack waterproof agent from the feeding pipe, and simultaneously drive the mixing assembly to rotate, so that the air and the anti-crack waterproof agent can be mixed and stirred. The spraying device of the anti-crack waterproof agent is designed to feed air and material through the air inlet pipe, and simultaneously drive the mixing assembly to mix and stir the air and the anti-crack waterproof agent through the high-speed airflow of the air inlet pipe, so that the anti-crack waterproof agent can be sufficiently and uniformly mixed with the air.

Description

Technical Field

[0001] This application relates to a spraying apparatus and method for a crack-resistant and waterproofing agent, and is applicable to the technical field of spraying crack-resistant and waterproofing agents. Background Technology

[0002] In the fields of construction, municipal engineering, and water conservancy, crack-resistant and waterproofing agents are increasingly widely used as key materials for improving the crack resistance and seepage prevention performance of concrete and other substrates. Especially under the promotion of green building materials policies, their demand continues to rise, making them one of the core building materials for ensuring project durability and reducing later maintenance costs. Crack-resistant and waterproofing agents need to be evenly adhered to the workpiece surface through spraying to form a dense protective coating in order to fully exert their function of inhibiting crack formation and blocking water penetration. Therefore, the stability of the spraying application directly determines the quality of waterproofing and crack resistance in the project.

[0003] Currently, conventional spraying equipment is commonly used in the application of crack-resistant waterproofing agents. However, the mixing mechanism design of existing spraying equipment has significant flaws, making it difficult to accurately control the mixing degree of the crack-resistant waterproofing agent. This easily leads to two extreme problems, severely affecting the construction effect and material utilization rate. Specifically: First, if the crack-resistant waterproofing agent is not fully mixed with air, it will result in uneven distribution of the internal components of the waterproofing agent, with some areas having excessively high concentrations and others having excessively low concentrations. This leads to uneven coating thickness on the workpiece surface after spraying, easily causing quality defects such as exposed substrate, pinholes, and bubbles. This damages the integrity and density of the coating, significantly reducing the protective performance of the crack-resistant waterproofing agent, failing to effectively prevent moisture penetration, easily causing substrate cracking and leakage, shortening the service life of the project, and increasing rework costs.

[0004] Secondly, if the crack-resistant waterproofing agent is mixed with air too thoroughly, it will be over-atomized, resulting in a paint mist that is too fine and light. During spraying, it is easily blown away and bounced by the airflow, causing most of the waterproofing agent to fail to adhere effectively to the workpiece surface. This not only causes serious waste of materials and increases construction costs, but also reduces construction efficiency. At the same time, the drifting paint mist will also pollute the construction environment.

[0005] In the existing technology, the relevant spraying devices are not designed with a suitable mixing control structure for the characteristics of crack-resistant and waterproofing agents, making it impossible to achieve precise control of the mixing degree and difficult to balance mixing uniformity and spraying adhesion effect. Summary of the Invention

[0006] The purpose of this application is to design a spraying device and method for a crack-resistant and waterproofing agent, aiming to solve the problem of sufficient mixing of existing crack-resistant and waterproofing agents with air.

[0007] This application relates to a spraying device for a crack-resistant and waterproofing agent. The spraying device includes a housing, an air inlet pipe, and a mixing component. The air inlet pipe is disposed on the housing and extends into the housing. The mixing component is rotatably disposed in the housing and is connected to the air inlet pipe. The air inlet pipe is also connected to a feed pipe. The air inlet pipe can drive the crack-resistant and waterproofing agent entering through the feed pipe into the housing by connecting to an air source, and simultaneously drive the mixing component to rotate, so as to stir and mix the crack-resistant and waterproofing agent and air.

[0008] In some embodiments, the outer shell is a cylindrical structure, and an annular cavity is provided between the air inlet pipe and the inner wall of the outer shell; the outer shell includes a small diameter section, a left conical section, a large diameter section and a right conical section; the left end of the large diameter section is connected to the small diameter section through the left conical section; the right end of the large diameter section is connected to the discharge pipe through the right conical section; the inner diameter of the large diameter section is larger than the inner diameter of the small diameter section.

[0009] In some embodiments, the intake pipe includes a pipe body and a flared pipe disposed at one end of the pipe body; the pipe body is at least partially disposed within the small diameter section and is coaxially disposed with the small diameter section; the flared pipe is disposed at the left conical section and extends to the large diameter section.

[0010] In some embodiments, the intake pipe is provided with a connecting channel, which includes a large-diameter section, a narrowing section, and a flared section; the large-diameter section and the narrowing section are located inside the pipe body, the large-diameter section is located at the left end of the narrowing section and communicates with the left end of the narrowing section; the flared section is located inside the flared pipe and communicates with the right end of the narrowing section; the flared pipe is also connected to the inner cavity of the large-diameter section.

[0011] In some implementations, the feed pipe is connected to the reduced diameter section; the connecting channel is coaxially arranged with the outer casing.

[0012] In some embodiments, the mixing component includes a rotating drum, a rotating shaft, and a speed-regulating transmission mechanism; the rotating shaft is rotatably disposed within the housing, capable of rotating about the axis of the housing, one end of the rotating shaft extends to a reduced diameter section, and an axial flow impeller is provided at the end of the rotating shaft located within the reduced diameter section; the rotating drum is rotatably disposed on the rotating shaft; the rotating shaft is connected to the rotating drum via the speed-regulating transmission mechanism to drive the rotating drum to rotate; multiple rings of mixing plates are provided on the outer wall of the rotating drum.

[0013] In some embodiments, the rotating cylinder is sleeved on the rotating shaft and coaxially arranged with the large-diameter section; the left end of the rotating cylinder is rotatably connected to the rotating shaft through a left conical cover, and the right end of the rotating cylinder is rotatably connected to the rotating shaft through a right conical cover; the rotating cylinder and the inner wall of the large-diameter section are connected by a support rod; the rotating cylinder can rotate on the support rod.

[0014] In some embodiments, the speed-regulating transmission mechanism includes a drive assembly and a transmission rod; the drive assembly is disposed on the inner wall of the rotating drum and is connected to the transmission rod in a driving manner to drive the transmission rod to reciprocate in the left-right direction within the rotating drum; one end of the transmission rod is connected to the rotating drum via a drive pair to drive the rotating drum to rotate; the transmission rod is provided with a large-diameter driven gear, a medium-diameter driven gear, and a small-diameter driven gear, and the rotating shaft is provided with a large-diameter driving gear, a medium-diameter driving gear, and a small-diameter driving gear; when the large-diameter driving gear meshes with the small-diameter driven gear, the rotating shaft drives the rotating drum to rotate at a first speed; when the medium-diameter driving gear meshes with the medium-diameter driven gear, the rotating shaft drives the rotating drum to rotate at a second speed; when the small-diameter driving gear meshes with the large-diameter driven gear, the rotating shaft drives the rotating drum to rotate at a third speed.

[0015] In some embodiments, a jacket is provided on the outer wall of the small-diameter section, and an air pipe is connected to the jacket. The air pipe is also connected to the inner cavity of the jacket. An air inlet is provided on the outer wall of the small-diameter section, which is connected to the inner cavity of the jacket and the annular cavity respectively.

[0016] This application also proposes a method for spraying an anti-cracking and waterproofing agent, using the aforementioned spraying device for the anti-cracking and waterproofing agent; the spraying method includes the following process: S1: High-speed air source enters the outer casing and the intake pipe through the air pipe respectively; S2: The crack-resistant and waterproofing agent enters the constricted section of the air inlet pipe through the feed pipe, and is driven into the large diameter section of the outer shell by the airflow; S3: The high-speed air source drives the axial flow impeller to rotate in the narrowing section. The axial flow impeller drives the rotating drum of the mixing component to rotate through the first transmission pair on the rotating shaft. Thus, the anti-cracking and waterproofing agent and air in the large-diameter section are stirred by the mixing plate to form a mixed fluid. The mixed fluid flows out from the discharge pipe. S4: When the mixing fluid is too sufficient, causing the crack-resistant and waterproofing agent to be over-atomized, the drive component drives the rotating shaft to switch to the second transmission pair to drive the rotating drum of the mixing component to rotate, thereby reducing the rotation speed of the drum.

[0017] The spraying device and method for a crack-resistant and waterproof agent proposed in this application have the following technical advantages: (1) The spraying device proposed in this application has a reasonable design of the outer shell and the air inlet pipe structure, which allows high-speed air and crack-resistant waterproofing agent to come into efficient contact. Combined with the annular channel layout, the mixing efficiency is initially improved. At the same time, the sealing structure ensures that the fluid does not leak, thus improving the sealing performance of the device. (2) The spraying device proposed in this application has a mixing component with an axial impeller and a rotating drum design, which allows high-speed air to drive the axial impeller to rotate the drum. The mixing plate is used to achieve full mixing of materials and air, without the need for additional power, saving energy and achieving good mixing effect. (3) The spraying device proposed in this application has a servo motor that can drive the guide rod to adjust the gear meshing mode, flexibly switch the rotation speed of the drum, effectively avoid excessive atomization of the crack-resistant waterproofing agent, adapt to different mixing requirements, and improve the flexibility of the device. (4) The spraying device proposed in this application has an integrated design of the whole structure, the parts are firmly connected, the operation is stable and convenient, and it can quickly realize material mixing and spraying preparation, improve construction efficiency, and adapt to actual engineering application scenarios. Attached Figure Description

[0018] Figure 1 is a schematic diagram of a spraying device for a crack-resistant and waterproofing agent according to this application.

[0019] Figure 2 is an enlarged schematic diagram of part A in Figure 1 of this application.

[0020] Figure 3 is an enlarged schematic diagram of part B in Figure 1 of this application.

[0021] Figure 4 is a schematic diagram of the intake pipe structure of this application.

[0022] In the diagram: 1. Small diameter section; 2. Left conical section; 3. Large diameter section; 4. Right conical section; 5. Discharge pipe; 6. Jacket; 7. Air pipe; 8. Air inlet; 9. Pipe body; 10. Reducing diameter section; 11. Flared pipe; 12. Axial flow impeller; 13. Feed pipe; 14. Left conical cover; 15. Rotary drum; 16. Right conical cover; 17. Support rod; 18. Mixing plate; 19. Rotating shaft; 20. Annular plate; 21. Gear ring; 22. Servo motor; 23. Lead screw; 24. Screw sleeve; 25. Intermediate rod; 26. Guide rod; 27. Rotating rod; 28. Spur gear; 29. ​​Large diameter drive gear; 30. Medium diameter drive gear; 31. Small diameter drive gear; 32. Large diameter driven gear; 33. Medium diameter driven gear; 34. Small diameter driven gear; 35. Large opening section; 36. Flared opening section. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0024] As shown in Figure 1, this application proposes a spraying device for a crack-resistant and waterproofing agent. The spraying device includes a housing, an air inlet pipe, and a mixing component. The air inlet pipe is disposed on the housing and extends into the housing. The mixing component is rotatably disposed within the housing and connected to the air inlet pipe. The air inlet pipe is also connected to a feed pipe 13, allowing the feed pipe 13 to deliver the crack-resistant and waterproofing agent material into the air inlet pipe. Specifically, the air inlet pipe can be connected to an air source to drive the crack-resistant and waterproofing agent entering through the feed pipe 13 into the housing, while simultaneously driving the mixing component to rotate, thereby mixing the crack-resistant and waterproofing agent with the air. The crack-resistant and waterproofing agent spraying device proposed in this application, by designing an air inlet pipe for air and material intake, and simultaneously using the high-speed airflow from the air inlet pipe to drive the mixing component to mix and stir the air and the crack-resistant and waterproofing agent, ensures that the crack-resistant and waterproofing agent is mixed with the air more thoroughly and uniformly.

[0025] As shown in Figure 1, in some embodiments, the outer shell is a cylindrical structure, and the axial direction of the outer shell in a horizontal state includes the left and right directions. An annular cavity is provided between the air inlet pipe and the inner wall of the outer shell. The outer shell is a one-piece molded structure, and includes a small-diameter section 1, a left conical section 2, a large-diameter section 3, and a right conical section 4. The left end of the small-diameter section 1 is sealed, and a perforation is located at the center of the small-diameter section 1. An air inlet pipe is inserted into the perforation, and the outer wall of the air inlet pipe is sealed and fixedly connected to the wall of the perforation. The left end of the large-diameter section 3 is connected to the small-diameter section 1 through the left conical section 2; the right end of the large-diameter section 3 is connected to the discharge pipe 5 through the right conical section 4; the inner diameter of the large-diameter section 3 is larger than the inner diameter of the small-diameter section 1. The size in the small-diameter section 1 and the large-diameter section 3 of this application is only a qualitative distinction between the two names and does not constitute a specific quantitative distinction.

[0026] As shown in Figure 1, in some embodiments, the intake pipe includes a pipe body 9 and a flared pipe 11 disposed at one end of the pipe body 9; the pipe body 9 is at least partially disposed within the small diameter section 1 and is coaxially disposed with the small diameter section 1; the flared pipe 11 is disposed at the left conical section 2 and extends to the large diameter section 3.

[0027] As shown in Figures 1 and 4, in some embodiments, a connecting channel is provided inside the intake pipe, and the connecting channel is coaxially arranged with the outer casing. The connecting channel includes a large-diameter section 35, a narrowing section 10, and a flared section 36; the large-diameter section 35 and the narrowing section 10 are located inside the pipe body 9, the large-diameter section 35 is located at the left end of the narrowing section 10 and communicates with the left end of the narrowing section 10; the flared section 36 is located inside the flared pipe 11 and communicates with the right end of the narrowing section 10; the flared pipe 11 also communicates with the inner cavity of the large-diameter section 3. The feed pipe 13 communicates with the narrowing section 10. Specifically, in this application, the outer shell includes a small-diameter section 1, a left conical section 2, a large-diameter section 3, and a right conical section 4. The air inlet pipe has a large-aperture section 35, a reduced-diameter section 10, and an flared-aperture section 36. The feed pipe 13 is connected to the reduced-diameter section 10. This structure allows high-speed air to generate a Venturi effect in the reduced-diameter section 10, which can not only effectively absorb the crack-resistant and waterproofing agent, but also achieve preliminary mixing inside the air inlet pipe. At the same time, the airflow energy is used to drive the mixing component to rotate, without the need for an additional power source.

[0028] The size of the large aperture segment 35 in this application is only a qualitative definition and there is no specific quantitative definition.

[0029] As shown in Figures 1 to 3, in some embodiments, the mixing assembly includes a rotating drum 15, a rotating shaft 19, and a speed-regulating transmission mechanism. The rotating shaft 19 is rotatably mounted within the housing, with one end extending into a reduced-diameter section 10. An axial flow impeller 12 is located at the end of the rotating shaft 19 within the reduced-diameter section 10. The rotating drum 15 is rotatably mounted on the rotating shaft 19. The rotating shaft 19 is connected to the rotating drum 15 via the speed-regulating transmission mechanism, enabling the rotating drum 15 to rotate. The speed-regulating transmission mechanism can also adjust the rotational speed of the rotating drum 15, thereby adjusting the mixing state of the air and the crack-resistant waterproofing agent. Multiple rings of mixing plates 18 are provided on the outer wall of the rotating drum 15, and these rings are evenly spaced along the axial direction of the rotating drum 15. By employing the above scheme, the speed of the rotating drum is precisely adjusted and controlled through the speed-regulating transmission mechanism, achieving precise control of the mixing degree and balancing mixing uniformity with coating adhesion.

[0030] As shown in Figure 1, in some embodiments, the rotating cylinder 15 is sleeved on the rotating shaft 19 and coaxially arranged with the large-diameter section 3; the left end of the rotating cylinder 15 is rotatably connected to the rotating shaft 19 through the left conical cover 14, and the left end of the left conical cover extends into the flared tube 11; the right end of the rotating cylinder 15 is rotatably connected to the rotating shaft 19 through the right conical cover 16, and the right end of the right conical cover 16 extends into the right conical section 4; the rotating cylinder 15 and the inner wall of the large-diameter section 3 are connected by a support rod 17; the rotating cylinder 15 can rotate on the support rod 17.

[0031] Specifically, the left end of the rotating drum 15 is rotatably mounted on the right end of the left conical shroud 14 via a sealed bearing, and the right end of the rotating drum 15 is rotatably mounted on the left end of the right conical shroud 16 via a sealed bearing. Both ends of the rotating shaft 19 are rotatably mounted on the left end of the left conical shroud and the right end of the right conical shroud 16 via sealed bearings, respectively. The left end of the rotating shaft 19 extends to the left beyond the outside of the left conical shroud and into the reduced diameter section 10 of the inlet pipe. An axial flow impeller 12 is fixedly connected to the left end of the rotating shaft 19, and the axial flow impeller 12 is located on the left side of the feed pipe 13.

[0032] There is an annular channel between the left conical shroud and the flared pipe 11, an annular channel between the rotating cylinder 15 and the large-diameter section 3, and an annular channel between the right conical shroud 16 and the right conical section 4, so as to realize the flow of mixed fluid.

[0033] As shown in Figures 1 and 3, in some embodiments, the speed regulating transmission mechanism includes a drive assembly and a transmission rod; the transmission rod includes a guide rod 26 and a rotating rod 27, one end of the guide rod 26 being connected to the rotating rod 27 via a bearing; the drive assembly is disposed on the inner wall of the rotating drum 15 and is pulsatorically connected to the guide rod 26, so as to drive the transmission rod to reciprocate in the left-right direction within the rotating drum 15. One end of the rotating rod 27 is pulsatorically connected to the rotating drum 15 via a drive pair, so as to drive the rotating drum 15 to rotate; the rotating rod 27 is provided with a large-diameter driven gear 32, a medium-diameter driven gear 33, and a small-diameter driven gear 34, and the rotating shaft 19 is provided with a large-diameter driving gear 29, a medium-diameter driving gear 30, and a small-diameter driving gear 31. Specifically, during the rotation of the rotating shaft 19, when the large-diameter driving gear 29 meshes with the small-diameter driven gear 34, the rotating shaft 19 drives the rotating drum 15 to rotate at a first speed; when the medium-diameter driving gear 30 meshes with the medium-diameter driven gear 33, the rotating shaft 19 drives the rotating drum 15 to rotate at a second speed; when the small-diameter driving gear 31 meshes with the large-diameter driven gear 32, the rotating shaft 19 drives the rotating drum 15 to rotate at a third speed, thereby achieving speed regulation.

[0034] As shown in Figures 1 and 3, in some embodiments, the drive assembly includes a servo motor 22, a lead screw 23, and an intermediate rod 25. The output shaft end of the servo motor 22 is fixedly connected to the lead screw 23, and the end of the lead screw 23 is rotatably mounted on the inner wall of the right conical cover 16 via an end plate and bearings. A threaded sleeve 24 is mounted on the lead screw 23, and the intermediate rod 25 is fixedly connected to the threaded sleeve 24. The lower end of the intermediate rod 25 is fixedly connected to a guide rod 26, so as to drive the guide rod 26 to reciprocate left and right. With the above scheme, when the servo motor 22 is started, it can drive the guide rod 26 to reciprocate left and right along the guide hole.

[0035] As shown in Figures 1 and 3, in some embodiments, the drive pair includes a gear ring 21 and a spur gear 28. An annular plate 20 is fixedly connected to the inner wall of the rotating drum 15, and the inner wall of the annular plate 20 is fixedly connected to the gear ring 21. The gear ring 21 is disposed on the annular plate 20 and can drive the rotating drum 15 to rotate via the annular plate 20. Specifically, three drive gears are fixedly connected to the rotating shaft 19: a large-diameter drive gear 29, a medium-diameter drive gear 30, and a small-diameter drive gear 31. The large-diameter drive gear 29 is located to the left of the medium-diameter drive gear 30, the medium-diameter drive gear 30 is located to the left of the small-diameter drive gear 31, and the large-diameter drive gear 29 is located to the right of the annular plate 20. A connecting plate is fixedly connected to the inner wall of the right conical cover 16. The connecting plate has a guide hole, and a guide rod 26 is installed in the guide hole. Three driven gears are fixedly connected to the rotating rod 27: a large-diameter driven gear 32, a medium-diameter driven gear 33, and a small-diameter driven gear 34. The large-diameter driven gear 32 is located to the right of the medium-diameter driven gear 33, and the medium-diameter driven gear 33 is located to the right of the small-diameter driven gear 34. The large-diameter driven gear 32 can mesh with the small-diameter driving gear 31, the medium-diameter driven gear 33 can mesh with the medium-diameter driving gear 30, and the small-diameter driven gear 34 can mesh with the large-diameter driving gear 29. A spur gear 28 is fixedly connected to the left end of the rotating rod 27, and the spur gear 28 meshes with the gear ring 21.

[0036] As shown in Figure 1, in some embodiments, a jacket 6 is provided on the outer wall of the small diameter section 1, and an air pipe 7 is connected to the jacket 6. The air pipe 7 is also connected to the inner cavity of the jacket 6. An air inlet 8 is provided on the outer wall of the small diameter section 1, which is connected to the inner cavity of the jacket 6 and the annular channel respectively, so as to realize the air source connection.

[0037] As shown in Figure 1, this application also proposes a method for spraying a crack-resistant and waterproofing agent, using the aforementioned spraying device for the crack-resistant and waterproofing agent; specifically, the spraying method includes the following process: S1: High-speed air source enters the outer casing and the intake pipe through air pipe 7 respectively; S2: The crack-resistant and waterproofing agent enters the reduced diameter section 10 of the air inlet pipe through the feed pipe 13, and is driven into the large diameter section 3 of the outer shell by the airflow. S3: The high-speed air source drives the axial flow impeller 12 to rotate in the narrowing section 10. The axial flow impeller 12 drives the rotating drum 15 of the mixing component to rotate through the first transmission pair on the rotating shaft 19, thereby stirring the crack-resistant waterproofing agent and air in the large-diameter section 3 through the mixing plate 18 to form a mixed fluid; the mixed fluid flows out from the discharge pipe 5; S4: When the mixed fluid is too sufficient, causing the crack-resistant waterproofing agent to be over-atomized, the driving component drives the rotating shaft 19 to switch to the second transmission pair to drive the rotating drum 15 of the mixing component to rotate, so as to reduce the rotation speed of the rotating drum 15.

[0038] As shown in Figures 1 to 4, when the anti-cracking and waterproofing agent spraying device proposed in this application is in use, the air inlet pipe and the air pipe 7 are in communication. High-speed air enters the large-diameter section 35, the narrow-diameter section 10 and the flared-diameter section 36 in the air inlet pipe. The anti-cracking and waterproofing agent enters the narrow-diameter section 10 through the feed pipe 13 and enters the annular channel between the mixing component and the outer shell along the flared-diameter section 36.

[0039] High-speed air enters the jacket 6 through the air pipe 7 and then enters the annular cavity between the air inlet pipe and the outer casing. The high-speed air mixes with the crack-resistant and waterproofing agent as it enters the annular channel, and the high-speed air can drive the axial flow impeller 12 to rotate as it flows through the reduced diameter section 10.

[0040] The axial impeller 12 drives the rotating shaft 19 to rotate. The rotating shaft 19 drives the spur gear 28 to rotate through the large-diameter driving gear 29 and the small-diameter driven gear 34. The spur gear 28 drives the gear ring 21 to rotate, which in turn drives the rotating drum 15 to rotate through the annular plate 20. The mixing plate 18 on the outer wall of the rotating drum 15 rotates and mixes the crack-resistant waterproofing agent and air. The mixed fluid flows out from the discharge pipe 5 at the right end of the outer shell. If the crack-resistant waterproofing agent is over-atomized due to excessive mixing, the servo motor 22 is activated to mesh the medium-diameter driving gear 30 with the medium-diameter driven gear 33, or the small-diameter driving gear 31 with the large-diameter driven gear 32, thereby reducing the rotational speed of the rotating drum 15 and reducing the uniformity of the mixing between the crack-resistant waterproofing agent and air.

[0041] As shown in Figures 1 to 4, the anti-crack and waterproofing agent spraying device and method proposed in this application can be applied to dam seepage prevention. It prevents seepage by spraying a mixture of anti-crack and waterproofing agent and air. During use, pre-construction preparation is first performed, checking the stability of the connections of each component of the device. It is confirmed that the outer shell, air inlet pipe, feed pipe 13, jacket 6, air pipe 7, and all sealed bearings of the spraying device are undamaged and leak-free. The air inlet pipe is connected to an external high-speed air source supply device, the feed pipe 13 is sealed to the anti-crack and waterproofing agent storage tank, and the discharge pipe 5 at the right end of the outer shell is fixedly connected to the spray gun head. The angle and height of the spray gun head are adjusted according to construction requirements.

[0042] Once ready, start the high-speed air supply equipment to continuously supply high-speed air into the air inlet pipe, which flows sequentially through the large-diameter section 35, the narrowing section 10, and the flaring section 36. At the same time, open the control valve on the feed pipe 13 to allow the crack-resistant and waterproofing agent to enter the narrowing section 10 of the air inlet pipe at a preset flow rate. After initial mixing with the high-speed air, it flows along the flaring section 36 into the annular channel between the left conical cover 14 and the flaring pipe 11, the rotating cylinder 15 and the large-diameter section 3, and the right conical cover 16 and the right conical section 4. Meanwhile, some of the high-speed air enters the jacket 6 through the air pipe 7 on the jacket 6 and enters the annular cavity between the outer shell and the air inlet pipe through the air inlet 8 on the outer wall of the small-diameter section 1, further mixing with the crack-resistant and waterproofing agent in the annular channel.

[0043] When high-speed air flows through the narrowing section 10, it drives the axial flow impeller 12 located inside the narrowing section 10 and on the left side of the feed pipe 13 to rotate. The axial flow impeller 12 drives the rotating shaft 19 to rotate synchronously, so that the large-diameter driving gear 29 on the rotating shaft 19 meshes with the small-diameter driven gear 34 on the rotating rod 27, driving the rotating rod 27 and the spur gear 28 to rotate. The spur gear 28 meshes with the gear ring 21 on the annular plate 20 on the inner wall of the rotating drum 15, thereby driving the rotating drum 15 to rotate. Several rings of mixing plates 18 on the outer wall of the rotating drum 15 rotate at a constant speed with the rotating drum 15, fully stirring and mixing the crack-resistant waterproofing agent and air in the annular channel. The mixed fluid is transported from the discharge pipe 5 to the spray gun head through the right conical section 4.

[0044] Furthermore, during the spraying process, the operator holds the spray gun and moves it at a constant speed along the construction surface according to the preset construction thickness and specifications, continuously observing the material output status of the spray gun. If excessive atomization of the anti-cracking and waterproofing agent is found in the output, the servo motor on the inner wall of the right conical cover is immediately activated. The servo motor drives the lead screw to rotate, and the screw sleeve drives the guide rod to move to the left along the guide hole of the connecting plate through the middle rod, so that the medium diameter drive gear meshes with the medium diameter drive gear, or the small diameter drive gear meshes with the large diameter driven gear, reducing the rotation speed of the drum, thereby adjusting the uniformity of the mixing of the anti-cracking and waterproofing agent with the air until the output status meets the construction requirements.

[0045] After the spraying operation is completed, first close the feed pipe control valve to stop the supply of crack-resistant and waterproofing agent. Keep the high-speed air supply equipment running for a period of time to blow away the residual crack-resistant and waterproofing agent in the pipes and equipment, and then turn off the high-speed air supply equipment. Finally, clean the equipment, remove all connecting parts, clean the residual material in the air inlet pipe, mixer, discharge pipe and spray gun head, check the wear of each gear, bearing and seal, and perform maintenance to facilitate the next use.

[0046] The spraying device and method for a crack-resistant and waterproof agent proposed in this application have the following technical advantages: (1) The spraying device proposed in this application has a reasonable design of the outer shell and the air inlet pipe structure, which allows high-speed air and crack-resistant waterproofing agent to come into efficient contact. Combined with the annular channel layout, the mixing efficiency is initially improved. At the same time, the sealing structure ensures that the fluid does not leak, thus improving the sealing performance of the device. (2) The spraying device proposed in this application has a mixing component with an axial impeller and a rotating drum design, which allows high-speed air to drive the axial impeller to rotate the drum. The mixing plate is used to achieve full mixing of materials and air, without the need for additional power, saving energy and achieving good mixing effect. (3) The spraying device proposed in this application has a servo motor that can drive the guide rod to adjust the gear meshing mode, flexibly switch the rotation speed of the drum, effectively avoid excessive atomization of the crack-resistant waterproofing agent, adapt to different mixing requirements, and improve the flexibility of the device. (4) The spraying device proposed in this application has an integrated design of the whole structure, the parts are firmly connected, the operation is stable and convenient, and it can quickly realize material mixing and spraying preparation, improve construction efficiency, and adapt to actual engineering application scenarios.

[0047] Although the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A spraying device for a crack-resistant and waterproofing agent, characterized in that, The spraying device includes an outer shell, an air inlet pipe, and a mixing component; the air inlet pipe is disposed on the outer shell and extends into the outer shell; the mixing component is rotatably disposed in the outer shell and engages with the air inlet pipe; the air inlet pipe is also connected to the feed pipe (13); the air inlet pipe can drive the crack-resistant waterproofing agent entering the feed pipe (13) into the outer shell by connecting to an air source, and at the same time drive the mixing component to rotate to stir and mix the crack-resistant waterproofing agent and air.

2. The spraying device for the crack-resistant and waterproof agent according to claim 1, characterized in that, The outer shell is a cylindrical structure, and an annular cavity is provided between the air inlet pipe and the inner wall of the outer shell. The outer shell includes a small diameter section (1), a left conical section (2), a large diameter section (3), and a right conical section (4). The left end of the large diameter section (3) is connected to the small diameter section (1) through the left conical section (2). The right end of the large diameter section (3) is connected to the discharge pipe (5) through the right conical section (4). The inner diameter of the large diameter section (3) is larger than the inner diameter of the small diameter section (1).

3. The spraying device for the crack-resistant and waterproof agent according to claim 2, characterized in that, The intake pipe includes a pipe body (9) and a flared pipe (11) disposed at one end of the pipe body (9); the pipe body (9) is at least partially disposed within the small diameter section (1) and is coaxially disposed with the small diameter section (1); the flared pipe (11) is disposed at the left conical section (2) and extends to the large diameter section (3).

4. The spraying device for the crack-resistant and waterproof agent according to claim 3, characterized in that, The intake pipe is provided with a connecting channel, which includes a large-diameter section (35), a narrow-diameter section (10), and a flared-diameter section (36). The large-diameter section (35) and the narrow-diameter section (10) are located inside the pipe body (9). The large-diameter section (35) is located at the left end of the narrow-diameter section (10) and is connected to the left end of the narrow-diameter section (10). The flared-diameter section (36) is located inside the flared pipe (11) and is connected to the right end of the narrow-diameter section (10). The flared pipe (11) is also connected to the inner cavity of the large-diameter section (3).

5. The spraying device for the crack-resistant and waterproof agent according to claim 4, characterized in that, The feed pipe (13) is connected to the reduced diameter section (10); the connecting channel is coaxially arranged with the outer shell.

6. The spraying device for the crack-resistant and waterproof agent according to claim 4, characterized in that, The mixing assembly includes a rotating drum (15), a rotating shaft (19), and a speed-regulating transmission mechanism; the rotating shaft (19) is rotatably disposed within the housing, capable of rotating around the axis of the housing, one end of the rotating shaft (19) extends to the reduced diameter section (10), and an axial flow impeller (12) is provided at one end of the rotating shaft (19) located within the reduced diameter section (10); the rotating drum (15) is rotatably disposed on the rotating shaft (19); the rotating shaft (19) is connected to the rotating drum (15) via the speed-regulating transmission mechanism to drive the rotating drum (15) to rotate; multiple rings of mixing plates (18) are provided on the outer wall of the rotating drum (15).

7. The spraying device for the crack-resistant and waterproof agent according to claim 6, characterized in that, The rotating cylinder (15) is sleeved on the rotating shaft (19) and coaxially arranged with the large diameter section (3); the left end of the rotating cylinder (15) is rotatably connected to the rotating shaft (19) through the left conical cover (14), and the right end of the rotating cylinder (15) is rotatably connected to the rotating shaft (19) through the right conical cover (16); the inner wall of the rotating cylinder (15) and the large diameter section (3) are connected by a support rod (17); the rotating cylinder (15) can rotate on the support rod (17).

8. The spraying device for the crack-resistant and waterproof agent according to claim 6, characterized in that, The speed regulating transmission mechanism includes a drive assembly and a transmission rod; the drive assembly is disposed on the inner wall of the rotating drum (15) and is connected to the transmission rod in a transmission manner, so as to drive the transmission rod to reciprocate in the left and right direction within the rotating drum (15); one end of the transmission rod is connected to the rotating drum (15) through a drive pair, so as to drive the rotating drum (15) to rotate; the transmission rod is provided with a large-diameter driven gear (32), a medium-diameter driven gear (33) and a small-diameter driven gear (34), and the rotating shaft (19) is provided with a large-diameter driving gear (29), a medium-diameter driven gear (33), and a small-diameter driven gear (34). The large-diameter driving gear (30) and the small-diameter driving gear (31); when the large-diameter driving gear (29) meshes with the small-diameter driven gear (34), the shaft (19) drives the drum (15) to rotate at a first speed; when the medium-diameter driving gear (30) meshes with the medium-diameter driven gear (33), the shaft (19) drives the drum (15) to rotate at a second speed; when the small-diameter driving gear (31) meshes with the large-diameter driven gear (32), the shaft (19) drives the drum (15) to rotate at a third speed.

9. The spraying apparatus for the crack-resistant and waterproofing agent according to any one of claims 2 to 8, characterized in that, The outer wall of the small diameter section (1) is provided with a jacket (6), and an air pipe (7) is connected to the jacket (6). The air pipe (7) is also connected to the inner cavity of the jacket (6). The outer wall of the small diameter section (1) is provided with an air inlet (8) that is connected to the inner cavity of the jacket (6) and the annular cavity respectively.

10. A method for spraying a crack-resistant and waterproofing agent, comprising using the spraying apparatus for the crack-resistant and waterproofing agent as described in any one of claims 1 to 9; characterized in that, The spraying method The process includes the following: S1: High-speed air source enters the outer shell and the air inlet pipe respectively through air pipe (7); S2: The crack-resistant and waterproofing agent enters the reduced diameter section (10) of the air inlet pipe through the feed pipe (13), and is driven into the large diameter section (3) of the outer shell by airflow; S3: A high-speed air source drives an axial flow impeller (12) to rotate in the reduced diameter section (10). The axial flow impeller (12) drives the rotating drum (15) of the mixing component to rotate through the first transmission pair on the rotating shaft (19). Thus, the crack-resistant waterproofing agent and air in the large diameter section (3) are stirred by the mixing plate (18) to form a mixed fluid. The mixed fluid flows out from the discharge pipe (5). S4: When the mixed fluid is too sufficient, causing the crack-resistant and waterproofing agent to be over-atomized, the drive component drives the rotating shaft (19) to switch to the second transmission pair to drive the rotating drum (15) of the mixing component to rotate, so as to reduce the rotation speed of the rotating drum (15).

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