Mixing device for waterproof coating production

Abstract

The invention provides a mixing device for waterproof coating production, and relates to the technical field of mixing devices. The invention discloses a mixing device for waterproof coating production. The mixing device comprises a workbench and a kettle shell arranged on the workbench, the material conveying barrel is rotationally arranged in the kettle shell, the side wall of the material conveying barrel is fixedly communicated with a first material barrel and a second material barrel, the first material barrel is arranged above the second material barrel, material conveying holes are formed in the side walls of the first material barrel and the second material barrel, control valves are arranged in the material conveying holes, and stirring paddles are fixedly connected to the side walls of the first material barrel and the second material barrel; the feeding pipe is rotationally arranged in the conveying barrel and used for inputting the rubber powder into the conveying barrel, and the outer side wall of the feeding pipe is fixedly sleeved with a conveying auger; and the driving mechanism is arranged below the kettle shell and is used for driving the material conveying auger and the material conveying barrel to rotate reversely. The asphalt mixing device has the effects of promoting uniform mixing of rubber powder and asphalt and improving the heating uniformity of the asphalt.

Description

Technical Field

[0001] The invention relates to the technical field of mixing devices, and in particular to a mixing device for producing waterproof coatings. Background Art

[0002] Waterproof coatings are used to prevent water penetration. With the rapid development of the construction industry, the demand for waterproof coatings is increasing. According to different classification standards, waterproof coatings are mainly divided into rubber waterproof coatings, non-curing rubber asphalt waterproof coatings, synthetic resin waterproof coatings, modified asphalt, asphalt waterproof coatings and polymer cement waterproof coatings.

[0003] Among many waterproof coatings, non-curing rubber asphalt waterproof coatings have been widely used in construction projects due to their excellent waterproof performance and environmental protection characteristics. In the production process of traditional non-curing rubber asphalt waterproof coatings, rubber powder and asphalt need to be added to a mixing container according to a certain ratio, and a mixer is used to fully stir and heat the materials until a uniform coating-like raw material is formed. Therefore, the mixing effect has an important influence on the performance of the coating.

[0004] For example, in the Chinese patent with the authorization announcement number CN115282822B and the subject name being root-penetration-resistant spray quick-setting liquid rubber HO waterproof coating and its preparation device, the main shaft drives the mixing frame to shake, and the raw materials in the storage tank intermittently fall into the mixing frame for mixing, and the mixed raw materials in the mixing frame fall into the stirring tank through the intermittently opened and closed first drop hole, and then the main shaft drives the turbine to suck the materials in the stirring tank into the mixing hood, and spray them out from the jet hole to impact the materials in the stirring tank, thereby improving the mixing effect, and at the same time, the liquid raw materials in the heating box are sucked into the materials in the stirring tank through the piston cylinder, thereby mixing the raw materials.

[0005] Regarding the above-mentioned related technologies, the traditional mixing method is to first pour the asphalt liquid into the mixing barrel, then pour other materials into the mixing barrel, and continue to stir and heat. In this way, the rubber powder contacts the surface of the asphalt, which is not conducive to the uniform mixing of the rubber powder and the asphalt, and will cause the powder to diffuse in the air and the asphalt liquid to splash, thereby polluting the operating environment. In addition, the heating source is set at the bottom of the barrel, which is easy to cause uneven heating of the materials in the barrel, which in turn leads to negative impacts on the production efficiency and quality of the waterproof coating. Summary of the invention

[0006] In view of this, the present invention provides a mixing device for waterproof coating production, aiming to solve the problem of uneven mixing of rubber powder and asphalt, and uneven heating of the mixture of asphalt and rubber powder.

[0007] In order to solve the above technical problems, the present invention provides a mixing device for waterproof coating production, including a workbench and a kettle shell with asphalt stored therein; a feed barrel, rotatably arranged in the kettle shell, the side wall of the feed barrel is fixedly connected with a first barrel and a second barrel, the first barrel is arranged above the second barrel, and the side walls of the first barrel and the second barrel are both provided with feed holes for conveying rubber powder to the kettle shell, a control valve is arranged inside the feed hole, and the side walls of the first barrel and the second barrel are both fixedly connected with stirring paddles; a feed pipe, rotatably arranged in the feed barrel, for inputting rubber powder into the feed barrel, and a feed auger is fixedly sleeved on the outer side wall of the feed pipe; a driving mechanism is arranged below the kettle shell, for driving the feed auger and the feed barrel to rotate in opposite directions.

[0008] By adopting the above technical solution, the first feeding hole and the second feeding hole transport the rubber powder into the asphalt in layers in the vertical direction, reducing the amount of dust that is transported to the feeding tube and diffused into the air, and at the same time facilitating the uniform mixing of the rubber powder and the asphalt. Moreover, the first feeding hole can cooperate with the second feeding hole to transport the asphalt on the top of the kettle shell downward, increasing the uniformity of the heating of the asphalt and improving the quality of the asphalt product.

[0009] Optionally, the driving mechanism includes a rotating source fixedly mounted on the workbench, the driving shaft fixing sleeve of the rotating source is provided with a driving gear, the feeding barrel is fixedly connected with a first transmission gear, the outer wall fixing sleeve of the feeding auger is provided with a second transmission gear, and the first transmission gear and the second transmission gear can both engage with the driving gear.

[0010] Optionally, the feeding cylinder is also connected to a third cylinder and a fourth cylinder along the axial direction for conveying rubber powder into the kettle shell, and the third cylinder and the fourth cylinder are both arranged between the first cylinder and the second cylinder.

[0011] Optionally, the feed pipe can slide axially along the feed cylinder, and the feed auger includes a first auger, a second auger is slidably connected to the lower end of the first auger, the second auger is fixedly connected to a second transmission gear, and a linear drive is fixedly installed on the outer wall of the kettle shell, and the drive shaft of the linear drive is fixedly connected to the feed pipe.

[0012] By adopting the above technical solution, the height of the asphalt liquid level inside the first auger is controlled. When the asphalt capacity inside the kettle shell decreases, the linear drive drives the first auger to descend, and the feed cylinder is flush with the liquid level inside the kettle shell.

[0013] Optionally, a plurality of first grinding teeth are fixedly connected to the inner side wall of the feeding barrel along the circumferential direction, the first grinding teeth are arranged above the first barrel, and a grinding wheel is provided on the fixed sleeve of the rotating shaft of the first auger.

[0014] By adopting the above technical solution, the grinding wheel crushes the agglomerated rubber powder, thereby increasing the uniformity of the rubber powder mixed into the asphalt and improving the quality of the coating product.

[0015] Optionally, a plurality of second grinding teeth are fixedly connected to the inner side wall of the feeding barrel along the circumferential direction, and the second grinding teeth are arranged between the first barrel and the second barrel.

[0016] By adopting the above technical solution, agglomeration will also occur after the rubber powder and asphalt are mixed. The grinding wheel moves to the second grinding tooth with the first auger, so that the grinding wheel rotates to grind and refine the mixed rubber powder and asphalt.

[0017] Optionally, an adjusting gear is fixedly sleeved on the outer wall of the first barrel, a connecting rod is fixedly connected to the outer wall of the feed pipe, an adjusting rack that can mesh with the adjusting gear is fixedly connected to one end of the connecting rod away from the feed pipe, and the adjusting rack can drive the adjusting gear to rotate as the feed pipe moves.

[0018] By adopting the above technical solution, when the first barrel outputs rubber powder to the kettle shell, the first feeding hole is set on the side wall of the first barrel in the opposite direction of the rotation direction of the first barrel. At this time, the first barrel will generate an outward thrust on the material during the rotation process, which helps the material to be discharged from the first feeding hole. In the process of stirring and mixing rubber powder and asphalt, the adjustment rack drives the adjustment gear to rotate 180 degrees, and the first feeding hole is in the direction of the rotation of the first barrel. At this time, the asphalt enters the first barrel in coordination with the movement of the first barrel, which can reduce unnecessary resistance and facilitate the asphalt to enter the first barrel for circulation.

[0019] Optionally, a discharge pipe is fixedly connected to the lower end of the side wall of the kettle shell, and a discharge valve is connected inside the discharge pipe.

[0020] In summary, compared with the prior art, the present invention has the following beneficial technical effects: The first feeding hole and the second feeding hole transport the rubber powder into the asphalt in layers in the vertical direction, reducing the amount of dust that is transported to the feeding tube and diffused into the air, and at the same time, it is conducive to uniform mixing of rubber powder and asphalt. In addition, the first feeding hole can cooperate with the second feeding hole to transport the asphalt on the top of the kettle shell downward, increasing the uniformity of asphalt heating and improving the quality of asphalt products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the kettle shell according to an embodiment of the present invention; Figure 3This is a schematic diagram of the internal structure of the feeding cylinder according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a driving mechanism according to an embodiment of the present invention; Figure 5 Schematic diagram of the first auger and the second auger of an embodiment of the present invention; Figure 6 Schematic diagram of a first auger, a second auger and a feed pipe according to an embodiment of the present invention; Figure 7 is a schematic diagram of a grinding wheel and a first grinding tooth according to an embodiment of the present invention; Figure 8 It is a top view of the feed tube and the first barrel according to an embodiment of the present invention.

[0022] Explanation of the reference numerals: 1. workbench; 2. kettle shell; 3. feed barrel; 31. first feed barrel; 311. feed hole; 312. first feed hole; 32. second feed barrel; 321. second feed hole; 33. control valve; 34. stirring paddle; 35. third feed barrel; 36. fourth feed barrel; 37. first grinding tooth; 38. second grinding tooth; 4. feed pipe; 41. feed auger; 411. grinding wheel; 412. first auger; 413. second auger; 414. filter hole; 415. rotating groove; 42. discharge hole; 43. rotating ring; 5. driving mechanism; 51. rotation source; 52. driving gear; 53. first transmission gear; 54. second transmission gear; 6. linear drive; 7. adjusting gear; 71. connecting rod; 72. adjusting rack; 8. discharge pipe; 81. discharge valve. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 8 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0024] This embodiment provides a mixing device for producing waterproof coatings. Figure 1 and Figure 2A mixing device for producing waterproof coatings includes a workbench 1 and a kettle shell 2 arranged on the workbench 1, and the workbench 1 can heat the kettle shell 2. Asphalt is stored inside the kettle shell 2, and a feed barrel 3 is rotatably arranged inside the kettle shell 2, and the side wall of the feed barrel 3 is fixedly connected with a first barrel 31 and a second barrel 32. The first barrel 31 is arranged above the second barrel 32, and the side walls of the first barrel 31 and the second barrel 32 are both provided with a feed hole 311, which is used to transport rubber powder to the kettle shell 2, and a control valve 33 is arranged inside the feed hole 311. The feed hole 311 includes a first feed hole 312 and a second feed hole 321, and the first feed hole 312 is opened in the first barrel 31, and the second feed hole 321 is opened in the second barrel 32. The side walls of the first barrel 31 and the second barrel 32 are both fixedly connected with a stirring paddle 34.

[0025] Reference Figure 2 and Figure 3 A feed pipe 4 is rotatably arranged inside the feed barrel 3. The feed pipe 4 extends out of the top wall of the feed barrel 3 and is rotatably connected to the top wall of the feed barrel 3. A discharge hole 42 is opened on the side wall of the feed pipe 4. The feed pipe 4 is used to feed rubber powder into the feed barrel 3 through the discharge hole 42. A feed auger 41 is rotatably sleeved on the outer side wall of the feed pipe 4. A driving mechanism 5 is arranged below the kettle shell 2. The driving mechanism 5 is used to drive the feed auger 41 and the feed barrel 3 to rotate in opposite directions. A discharge pipe 8 is fixedly connected to the lower end of the side wall of the kettle shell 2, and a discharge valve 81 is connected inside the discharge pipe 8.

[0026] Asphalt is poured into the kettle shell 2. At this time, the first barrel 31 and the second barrel 32 are located below the asphalt liquid surface. Then, the pneumatic powder delivery pump is installed to the end of the feed pipe 4 extending out of the feed barrel 3. The pneumatic powder delivery pump uses the flowing airflow to deliver the rubber powder to the feed pipe 4. The drive mechanism 5 starts to drive the feed auger 41 to rotate, assisting the downward transportation of the rubber powder. At this time, the control valve 33 in the first feed hole 312 and the second feed hole 321 is opened, and the rubber powder is delivered to the inside of the asphalt through the first feed hole 312 and the second feed hole 321 with the flowing airflow. This not only reduces the amount of dust that is transported to the feed barrel 3 and diffused into the air, but also delivers the rubber powder to the inside of the asphalt in layers, which is conducive to uniform mixing of the rubber powder and the asphalt.

[0027] After the feeding auger 41 finishes conveying the rubber powder, the driving mechanism 5 drives the feeding barrel 3 to rotate, and the feeding barrel 3 drives the stirring paddle 34 to rotate around the central axis of the feeding barrel 3 through the first barrel 31 and the second barrel 32, thereby stirring and mixing the asphalt and the rubber powder. When the rubber powder is conveyed, the workbench 1 heats the bottom of the kettle shell 2, the driving mechanism 5 drives the feeding auger 41 to rotate, and the control valve 33 remains in an open state, so that the asphalt in the kettle shell 2 enters the feeding barrel 3 through the first feeding hole 312, and the feeding auger 41 transports the asphalt downward to the second feeding barrel 32. When the feeding auger 41 rotates to transport the asphalt downward, it can exert an extrusion force on the asphalt at the bottom of the feeding barrel 3, thereby squeezing the asphalt at the bottom of the feeding barrel 3 and conveying it into the kettle shell 2 through the second feeding hole 321. As a result, the first feeding hole 312 and the second feeding hole 321 can not only convey the rubber powder into the asphalt, but also the first feeding hole 312 can cooperate with the second feeding hole 321 to transport the asphalt on the top of the kettle shell 2 downward, thereby increasing the uniformity of the heating of the asphalt and improving the quality of the asphalt product.

[0028] Reference Figure 4 The driving mechanism 5 includes a rotation source 51, a driving gear 52, a first transmission gear 53 and a second transmission gear 54. The rotation source 51 is fixedly mounted on the workbench 1, the driving gear 52 is fixedly sleeved on the driving shaft of the rotation source 51, the first transmission gear 53 and the second transmission gear 54 are both meshed with the driving gear 52, and the driving gear 52, the first transmission gear 53 and the second transmission gear 54 are all bevel gears. The driving gear 52 drives the first transmission gear 53 and the second transmission gear 54 to rotate in opposite directions, the first transmission gear 53 is fixedly connected to the feeding barrel 3, and the second transmission gear 54 is fixedly sleeved on the outer wall of the feeding auger 41, thereby making the feeding auger 41 rotate in opposite directions to the feeding barrel 3. In addition, two rotation sources 51 with opposite directions are set to respectively drive the feed pipe 4 and the feeding barrel 3 to rotate, so that the feeding auger 41 can also rotate in opposite directions to the feeding barrel 3.

[0029] Reference Figure 2 The feeding barrel 3 is also connected to the third barrel 35 and the fourth barrel 36 along the axial direction. The third barrel 35 and the fourth barrel 36 are both arranged between the first barrel 31 and the second barrel 32. The feeding hole 311 is also opened in the side wall of the third barrel 35 and the fourth barrel 36. The control valve 33 is also arranged in the feeding hole 311 of the third barrel 35 and the fourth barrel 36. The stirring paddle 34 is also fixedly installed on the side wall of the third barrel 35 and the fourth barrel 36. The third barrel 35 and the fourth barrel 36 increase the number of barrels that convey the rubber powder in the feeding barrel 3 to the kettle shell 2, and improve the uniformity of the rubber powder spreading in the asphalt.

[0030] Reference Figure 3 and Figure 5, the feed pipe 4 can slide axially along the feed barrel 3, the feed auger 41 includes a first auger 412 and a second auger 413, the second auger 413 is slidably sleeved on the outer side of the first auger 412 by means of a spline connection, so that the first auger 412 and the second auger 413 can move relative to each other in the vertical direction, and the first auger 412 and the second auger 413 can rotate synchronously around the central axis of the feed pipe 4. The second auger 413 is arranged below the first auger 412, and the second auger 413 is fixedly connected to the second transmission gear 54, so that the second transmission gear 54 can drive the first auger 412 and the second auger 413 to rotate synchronously.

[0031] Reference Figure 3 and Figure 6 The outer side surface of the feed pipe 4 is fixedly connected with a rotating ring 43, and the inner side surface of the first auger 412 is provided with a rotating groove 415 along the circumferential direction. The rotating groove 415 can cooperate with the rotating ring 43, so that the first auger 412 is rotatably sleeved on the outer side surface of the feed pipe 4, and the first auger 412 can rotate relative to the feed pipe 4. The first auger 412 and the feed pipe 4 can move synchronously in the vertical direction, and the feed pipe 4 has no connection relationship with the second auger 413. A linear drive 6 is fixedly installed on the outer side wall of the kettle shell 2, and the driving shaft of the linear drive 6 is rotatably connected with the feed pipe 4. The linear drive 6 drives the first auger 412 to move in the vertical direction through the feed pipe 4, thereby controlling the height of the first auger 412 inside the feeding cylinder 3, thereby controlling the height of the asphalt liquid level inside the first auger 412. When the asphalt capacity inside the kettle shell 2 decreases, the linear drive 6 drives the first auger 412 to decrease, and the feeding cylinder 3 is flush with the liquid level inside the kettle shell 2.

[0032] Reference Figure 7 The inner side wall of the feeding barrel 3 is fixedly connected with a plurality of first grinding teeth 37 along the circumferential direction. The first grinding teeth 37 are arranged below the discharge hole 42 and above the first barrel 31. The rotating shaft fixed sleeve of the first auger 412 is provided with a grinding wheel 411. The grinding wheel 411 is provided with a filter hole 414. The side wall of the grinding wheel 411 has a taper. The rubber powder falls to the grinding wheel 411 through the discharge hole 42, and the unagglomerated rubber powder falls through the filter hole 414. The grinding wheel 411 rotates with the feeding auger 41. The rubber powder moves close to the side wall of the feeding barrel 3 due to the centrifugal force of the grinding wheel 411. The grinding wheel 411 rotates with the first grinding teeth 37 to crush the blocky rubber powder, which is conducive to the uniform mixing of the rubber powder in the asphalt.

[0033] Reference Figure 3The inner wall of the feeding barrel 3 is fixedly connected with a plurality of second grinding teeth 38 along the circumferential direction, and the second grinding teeth 38 are arranged between the first barrel 31 and the second barrel 32. Since the mixing of rubber powder and asphalt will produce agglomeration, the linear drive 6 drives the grinding wheel 411 to move close to the second grinding teeth 38 through the feeding pipe 4 and the first auger 412, so that the mixture of rubber powder and asphalt flows through the grinding wheel 411, and the grinding wheel 411 cooperates with the second grinding teeth 38 to grind the agglomerated materials of rubber powder and asphalt.

[0034] Reference Figure 2 and Figure 8 The outer wall of the first barrel 31 is fixedly sleeved with an adjusting gear 7, and the outer wall of the feed pipe 4 is fixedly connected with a connecting rod 71. The end of the connecting rod 71 away from the feed pipe 4 is fixedly connected with an adjusting rack 72 that can mesh with the adjusting gear 7. The adjusting rack 72 can drive the adjusting gear 7 to rotate as the feed pipe 4 moves, and the adjusting gear 7 rotates 180 degrees each time. The first feeding hole 312 is opened on a single side of the first barrel 31. When the first barrel 31 rotates clockwise around the central axis of the feed pipe 4 to output rubber powder to the asphalt in the kettle shell 2 (refer to Figure 8 ), the opening of the first feed hole 312 is located on the side wall of the first barrel 31 in the opposite direction of the rotation direction of the first barrel 31. At this time, the first barrel 31 will generate an outward thrust on the material during the rotation process, which helps the rubber powder to be discharged from the first feed hole 312 and improve the discharge efficiency.

[0035] During the process of stirring and mixing rubber powder and asphalt, the linear drive 6 drives the adjusting rack 72 to move through the feed pipe 4, and the adjusting rack 72 drives the first barrel 31 to rotate 180 degrees again through the adjusting gear 7, thereby flipping the opening direction of the first feed hole 312. At this time, the opening of the first feed hole 312 is in the direction of rotation of the first barrel 31. At this time, the asphalt enters the first barrel 31 in coordination with the movement of the first barrel 31. Due to the high viscosity of the asphalt liquid, the turbulence generated by the rotation of the first barrel 31 is opposite to the liquid inlet, which helps the liquid to enter the first barrel 31 faster.

[0036] The implementation principle of a mixing device for waterproof coating production in an embodiment of the present invention is as follows: asphalt is poured into the kettle shell 2, and then the pneumatic powder delivery pump is used to output a flowing airflow to deliver rubber powder to the feed pipe 4. The drive mechanism 5 is started to drive the delivery auger 41 to rotate, assisting the downward transportation of the rubber powder. At this time, the control valves 33 in the first delivery hole 312 and the second delivery hole 321 are opened, and the rubber powder is delivered to the inside of the asphalt through the first delivery hole 312 and the second delivery hole 321 along with the flowing airflow.

[0037] After the rubber powder is transported by the feeding auger 41, the driving mechanism 5 drives the feeding barrel 3 to rotate, and the feeding barrel 3 drives the stirring paddle 34 to rotate around the central axis of the feeding barrel 3 through the first barrel 31 and the second barrel 32, so as to mix the asphalt and the rubber powder. When the rubber powder is transported, the workbench 1 heats the bottom of the kettle shell 2, and the driving mechanism 5 drives the feeding auger 41 to rotate, so that the asphalt in the kettle shell 2 enters the feeding barrel 3 through the first feeding hole 312, and the feeding auger 41 transports the asphalt downward to the second barrel 32, and transports it to the kettle shell 2 through the second feeding hole 321, so that the first feeding hole 312 and the second feeding hole 321 cooperate to transport the asphalt on the top of the kettle shell 2 downward.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A mixing device for producing waterproof coatings, comprising a workbench (1) and a kettle shell (2) storing asphalt therein, characterized in that: Also includes: A feeding barrel (3) is rotatably arranged in the kettle shell (2); a first barrel (31) and a second barrel (32) are fixedly connected on the side wall of the feeding barrel (3); the first barrel (31) is arranged above the second barrel (32); a feeding hole (311) for conveying rubber powder to the kettle shell (2) is formed on the side walls of the first barrel (31) and the second barrel (32); a control valve (33) is arranged inside the feeding hole (311); and a stirring paddle (34) is fixedly connected to the side walls of the first barrel (31) and the second barrel (32); A feed pipe (4) is rotatably disposed in the feed barrel (3) and is used to feed rubber powder into the feed barrel (3); a feed auger (41) is sleeved on the outer wall of the feed pipe (4); The driving mechanism (5) is arranged below the kettle shell (2) and is used to drive the feeding auger (41) and the feeding cylinder (3) to rotate in opposite directions.

2. A mixing device for waterproof coating production according to claim 1, characterized in that: The driving mechanism (5) comprises a rotation source (51) fixedly mounted on the workbench (1); a driving shaft of the rotation source (51) is fixedly sleeved with a driving gear (52); the feed cylinder (3) is fixedly connected with a first transmission gear (53); an outer wall of the feed auger (41) is fixedly sleeved with a second transmission gear (54); the first transmission gear (53) and the second transmission gear (54) are both capable of meshing with the driving gear (52).

3. A mixing device for producing waterproof coating according to claim 1, characterized in that: The feeding barrel (3) is also connected axially to a third barrel (35) and a fourth barrel (36) for conveying rubber powder into the kettle shell (2); the third barrel (35) and the fourth barrel (36) are both arranged between the first barrel (31) and the second barrel (32).

4. A mixing device for producing waterproof coating according to claim 2, characterized in that: The feed pipe (4) can slide axially along the feed cylinder (3), the feed auger (41) comprises a first auger (412), the lower end of the first auger (412) is slidably connected to a second auger (413), the second auger (413) is fixedly connected to a second transmission gear (54), and a linear drive (6) is fixedly mounted on the outer wall of the kettle shell (2), and the drive shaft of the linear drive (6) is fixedly connected to the feed pipe (4).

5. A mixing device for producing waterproof coating according to claim 4, characterized in that: A plurality of first grinding teeth (37) are fixedly connected to the inner side wall of the feeding barrel (3) along the circumferential direction. The first grinding teeth (37) are arranged above the first barrel (31). A grinding wheel (411) is fixedly mounted on the rotating shaft of the first auger (412).

6. A mixing device for producing waterproof coating according to claim 5, characterized in that: A plurality of second grinding teeth (38) are fixedly connected to the inner side wall of the feeding barrel (3) along the circumferential direction, and the second grinding teeth (38) are arranged between the first barrel (31) and the second barrel (32).

7. A mixing device for producing waterproof coating according to claim 4, characterized in that: An adjusting gear (7) is fixedly sleeved on the outer wall of the first barrel (31), a connecting rod (71) is fixedly connected to the outer wall of the feed pipe (4), and an adjusting rack (72) capable of meshing with the adjusting gear (7) is fixedly connected to one end of the connecting rod (71) away from the feed pipe (4), and the adjusting rack (72) can drive the adjusting gear (7) to rotate as the feed pipe (4) moves.

8. A mixing device for producing waterproof coating according to claim 1, characterized in that: A discharge pipe (8) is fixedly connected to the lower end of the side wall of the kettle shell (2), and a discharge valve (81) is connected inside the discharge pipe (8).

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