Elastomer modified asphalt waterproof coating and preparation device thereof

Abstract

The present invention relates to the technical field of waterproof coatings, and discloses a preparation device for an elastomer-modified asphalt waterproof coating, comprising a stator with a material guide cavity provided therein and a rotor arranged inside the material guide cavity, a grinding zone is formed between the rotor and the stator, and a material blocking plate is arranged in the grinding zone to slow down the flow speed of the material in the grinding zone. By arranging a material blocking plate in the grinding zone to hinder the flowing material, the flow speed of the material in the grinding zone is slowed down, so as to increase the grinding time of the material in the grinding zone, increase the time of grinding the material once, and thus make the material more fully ground.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof coatings, and in particular to an elastomer-modified asphalt waterproof coating and a preparation device thereof. Background Art

[0002] Modified asphalt is an asphalt binder made by adding rubber, resin, high molecular polymer, ground rubber powder or other fillers, or by taking measures such as mild oxidation of asphalt to improve the performance of asphalt or asphalt mixture. There are two mechanisms for modifying asphalt. One is to change the chemical composition of asphalt, and the other is to make the modifier evenly distributed in the asphalt to form a certain spatial network structure. In the production process of modified asphalt, one of the important links is the process of grinding the high-temperature base asphalt added with styrene-butadiene block polymer (SBS) through a colloid mill.

[0003] Among them, the colloid mill is driven by an electric motor to rotate the rotor at high speed, while the stator is stationary. The processed material is pressurized by its own weight or external pressure (which can be generated by a pump) to generate a downward spiral impact force. When passing through the gap between the rotor and the stator, it is subjected to strong shear force, friction force, high-frequency vibration, high-speed vortex and other physical effects, so that the material is effectively emulsified, dispersed, homogenized and crushed.

[0004] For example, the Chinese invention patent with application number CN202011495406.3, authorization announcement number CN112403603B, and titled “A colloid mill for konjac processing” discloses “a support base and a support frame, a feed port is welded on one side of the inner part of the support frame, a No. 1 support block is welded on both sides of the outer surface of the feed port, and a No. 4 fixing block is welded on one side of the outer surface of the No. 1 support block, a spring group is welded on the end of one side of the outer surface of the No. 4 fixing block, a No. 2 fixing block is welded on one side of the outer surface of the No. 1 support block, a control block is connected to one side of the inner part of the No. 2 fixing block, and the feed port is welded on the outer surface of the No. 1 support block. A fixed grinding body is clamped and connected on one side of the surface, and No. 3 fixing blocks are welded on both sides of the outer surface of the fixed grinding body. A rotating grinding body is arranged on one side of the inner part of the fixed grinding body, and a rotating motor is welded on one side of the upper surface of the supporting base, and a rotating rod is welded on one side of the outer surface of the rotating motor, and one side of the outer surface of the rotating rod is clamped and connected with the corresponding side of the inner part of the rotating grinding body, and No. 6 fixing blocks are welded on both sides of the outer surface of the rotating rod, and No. 5 fixing blocks are welded on both sides of the outer surface of the rotating rod, and one side of the outer surface of the No. 5 fixing block is rotatably connected with No. 2 supporting block. Through the corresponding structural design, the stator and rotor can be easily replaced while grinding is realized.

[0005] It can be found from the drawings in the above invention patent and the prior art that when the existing colloid mill is grinding materials, since the grinding zone formed between the stator and the rotor is completely unobstructed, the materials will quickly flow out along the grinding zone during the grinding process, which makes the material stay in the grinding zone for a short time, which in turn leads to a short grinding time of the material, which easily causes insufficient grinding of the material. Summary of the invention

[0006] The purpose of the present invention is to provide an elastomer-modified asphalt waterproof coating and a preparation device thereof to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a preparation device of an elastomer-modified asphalt waterproof coating, comprising a stator with a material guide cavity opened inside and a rotor arranged inside the material guide cavity, a grinding interval is formed between the rotor and the stator, and a material blocking plate is arranged in the grinding interval to slow down the flow speed of the material in the grinding interval.

[0008] In the above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, the material blocking plates are divided into a plurality of groups, and the plurality of groups of material blocking plates are circumferentially spaced around the axis of the rotor.

[0009] In the above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, there are multiple material blocking plates in each group, which are arranged at intervals in the upper and lower parts so that the grinding area forms a multi-level grinding layer from top to bottom.

[0010] In the above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, each of the material blocking plates is inclined downward toward the center, a gap is formed between the free end of each of the material blocking plates and the outer surface of the rotor, and each of the material blocking plates is fan-shaped.

[0011] In the above-mentioned preparation device of elastomer-modified asphalt waterproof coating, the outer surface of the rotor is provided with a plurality of annular grooves arranged at intervals from top to bottom, each of the annular grooves corresponds one by one to the free end of each material blocking plate in each group, and the material flows into the corresponding annular groove when passing between each level of grinding layers to slow down the flow speed of the material for a second time.

[0012] The above-mentioned preparation device of elastomer-modified asphalt waterproof coating also includes a plurality of force-applying members corresponding to the plurality of groups of material blocking plates, each of the force-applying members is transmission-connected with the corresponding groups of material blocking plates, the material blocking plates are slidingly plugged into the stator, and each force-applying member drives the corresponding material blocking plate to approach or move away from the rotor through the different weights of the ground materials.

[0013] In the above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, the stator is fixedly mounted on the material receiving box, a material receiving area is formed between the stator and the material receiving box, and a discharge pipe connected to the material receiving area is provided on the material receiving box.

[0014] In the above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, the force-applying member includes a plurality of supporting legs slidably plugged into the material receiving box, and a plurality of supporting springs are arranged between the supporting legs and the bottom of the material receiving box to elastically support the material receiving box.

[0015] The above-mentioned preparation device of the elastomer-modified asphalt waterproof coating, the force-applying member also includes a plurality of limit plates corresponding one-to-one to the plurality of groups of material blocking plates, each of the limit plates is slidably plugged into the stator, each group of the material blocking plates is slidably engaged with the corresponding limit plates, each of the limit plates is fixedly connected one-to-one with each supporting leg, and when relative sliding occurs between the limit plates and the stator in the up and down directions, the corresponding material blocking plates can be driven to approach and move away from the rotor.

[0016] An elastomer-modified asphalt waterproof coating comprises 4%-5% by weight of styrene-butadiene block polymer, 0.85%-2.5% by weight of ethylene-vinyl acetate copolymer, 6%-7% by weight of graphite powder, and the remainder is matrix asphalt. The mixture of the styrene-butadiene block polymer, ethylene-vinyl acetate copolymer and matrix asphalt is ground by any of the above-mentioned preparation devices and then graphite powder is added.

[0017] In the above technical scheme, the elastomer-modified asphalt waterproof coating and its preparation device provided by the present invention, compared with the prior art, set a material blocking plate in the grinding zone to form an obstruction to the flowing material, thereby slowing down the flow speed of the material in the grinding zone, so as to increase the grinding time of the material in the grinding zone, increase the grinding time of the material once, and thus make the material more fully ground, which can effectively solve the shortcomings of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure of a preparation device provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a preparation device when the free end of the material blocking plate provided in an embodiment of the present invention has not slid into the annular groove;

[0021] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure of part A;

[0022] Figure 4A cross-sectional view of a preparation device when the free end of the material blocking plate provided in an embodiment of the present invention slides into the annular groove;

[0023] Figure 5 A schematic diagram of the connection structure between each material blocking plate and the rotor when the free end of the material blocking plate provided in an embodiment of the present invention slides into the annular groove;

[0024] Figure 6 This is a disassembled diagram of each material blocking plate and the rotor provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Material receiving box; 101. Material discharge pipe; 2. Stator; 201. Material guide cavity; 202. Slide groove; 3. Rotor; 301. Upper ring groove; 302. Middle ring groove; 303. Lower ring groove; 4. Drive shaft; 5. Support leg; 501. Support plate; 6. Support spring; 7. Limit plate; 701. Clamping groove; 8. Upper material blocking plate; 9. Middle material blocking plate; 10. Lower material blocking plate; 11. Primary grinding layer; 12. Secondary grinding layer; 13. Third grinding layer; 14. Fourth grinding layer; 15. Clamping plate. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] First embodiment:

[0029] like Figure 1-6 As shown, an embodiment of the present invention provides a preparation device for an elastomer-modified asphalt waterproof coating, comprising a stator 2 with a material guide cavity 201 opened therein and a rotor 3 arranged inside the material guide cavity 201, a grinding zone is formed between the rotor 3 and the stator 2, and a material blocking plate is arranged in the grinding zone to slow down the flow speed of the material in the grinding zone.

[0030] The preparation device of the elastomer modified asphalt waterproof coating provided in this embodiment is mainly used for grinding the material (the material is a mixture of styrene-butadiene block polymer, ethylene-vinyl acetate copolymer and matrix asphalt). The words related to position and direction such as "upper" and "lower" involved in this embodiment are relative to the accompanying drawings. Specifically, the stator 2 is fixedly arranged, the rotor 3 is rotatably arranged, and a drive shaft 4 is fixedly installed on the axis of the rotor 3. The drive shaft 4 is connected to the output shaft of the drive motor (not shown in the figure) through a coupling. The details are not repeated. The drive motor drives the drive shaft 4 to rotate, and the drive shaft 4 drives the rotor 3 to rotate. The rotor 3 is a cone with the tip facing upward. The distance between the outer peripheral surface of the rotor 3 and the inner wall of the material guide cavity 201 decreases from top to bottom, so that the material is ground step by step. The guide cavity 201 is used to hold the material to be ground. The rotor 3 is located in the lower half of the guide cavity 201. Under the action of gravity, the material flows from the upper half of the guide cavity 201 into the grinding interval between the rotor 3 and the stator 2. The material in the grinding interval is ground under the action of the rotation of the rotor 3, and the ground material flows out from the bottom of the grinding interval. Among them, the material blocking plate is arranged in the grinding interval. The material needs to pass through the material blocking plate when flowing in the grinding interval. The existence of the material blocking plate blocks the material when it flows in the grinding interval, thereby reducing the flow rate of the material, increasing the time the material stays in the grinding interval, that is, increasing the time the material is ground once, which can make the material ground more fully. In the prior art, since the grinding interval formed between the stator and the rotor is completely unobstructed, the material will quickly flow out along the grinding interval during the grinding process, so that the material stays in the grinding interval for a short time, thereby resulting in a short time for the material to be ground once, which is easy to cause insufficient material grinding. The present invention increases the time for the material to be ground once by adding the setting of the blocking plate, so that the material can be ground more fully once.

[0031] In this embodiment, a material blocking plate is set in the grinding zone to form an obstruction to the flowing material, thereby slowing down the flow speed of the material in the grinding zone, so as to increase the grinding time of the material in the grinding zone, increase the grinding time of the material once, and make the material grinded more fully, which can effectively solve the shortcomings of the prior art.

[0032] Furthermore, the material blocking plates are divided into multiple groups, and the multiple groups of material blocking plates are arranged at intervals in the circumferential direction around the axis of the rotor 3. The arrangement of multiple groups of material blocking plates can increase the shielding range of the grinding area by the material blocking plates, so that the speed of the material passing through the material blocking plates is slowed down, the grinding time is increased, and the material being ground flows through the intervals between the adjacent groups of material blocking plates.

[0033] Furthermore, there are multiple material blocking plates in each group and they are arranged at intervals up and down so that the grinding zone forms a multi-level grinding layer from top to bottom, and the width of each grinding layer (i.e., the distance between the outer surface of the rotor 3 and the inner wall of the stator 2) decreases from top to bottom so that the degree of material grinding gradually increases. By providing multiple material blocking plates arranged up and down in each group, not only can the material grinding time be increased to make the grinding more complete, but also the material can be ground at different levels in sequence to make the material crushing more consistent and less likely to have large and small particles mixed, and can effectively prevent the material from causing blockage at the bottom of the grinding zone (because the width of the bottom of the grinding zone is the smallest, when the material is not graded and ground, the large and small particles in the material will mix together and flow downward, and when it flows to the bottom of the grinding zone, it is easy to cause accumulation of large and small particles, which leads to blockage).

[0034] Take the number of each group of blocking plates as three for example (such as Figure 2 and 3 As shown), the three material blocking plates in each group are an upper material blocking plate 8, a middle material blocking plate 9 and a lower material blocking plate 10, a primary grinding layer 11 is formed above the upper material blocking plate 8, a secondary grinding layer 12 is formed between the upper material blocking plate 8 and the middle material blocking plate 9, a tertiary grinding layer 13 is formed between the middle material blocking plate 9 and the lower material blocking plate 10, and a fourth grinding layer 14 is formed below the lower material blocking plate 10. The primary grinding layer 11, the secondary grinding layer 12, the tertiary grinding layer 13 and the fourth grinding layer 14 are arranged in sequence from top to bottom and are interconnected, and the widths of the primary grinding layer 11, the secondary grinding layer 12, the tertiary grinding layer 13 and the fourth grinding layer 14 decrease in sequence, and the material The material is ground in sequence through the primary grinding layer 11, the secondary grinding layer 12, the tertiary grinding layer 13 and the fourth grinding layer 14. Since the material needs to pass through the gaps formed between the circumferentially adjacent material blocking plates when passing through each grinding layer, the flow rate of the material is reduced to make the grinding more complete. At the same time, due to the hierarchical grinding layer by layer, materials of different sizes are ground in different grinding layers, thereby improving the consistency of material crushing. Furthermore, the material entering the fourth grinding layer 14 is in the form of uniform fine particles, so that the material will not accumulate in large quantities in the fourth grinding layer 14, and is not easy to cause blockage, so that the material can smoothly leave the grinding interval.

[0035] Furthermore, the outer surface of the rotor 3 is provided with a plurality of annular grooves arranged at intervals from top to bottom, and each annular groove corresponds to the free end of each material blocking plate in each group. When the material crosses between the grinding layers at each level, it flows into the corresponding annular groove to slow down the flow rate of the material for a second time. Specifically, since the mixture of styrene-butadiene block polymer, ethylene-vinyl acetate copolymer and matrix asphalt is in a viscous colloid state, the overall fluidity is associated. When a certain place is subjected to resistance, it will affect the overall flow rate, thereby increasing the grinding time in the grinding interval. In this embodiment, since each annular groove corresponds to the free end of each material blocking plate in each group, the material flowing down from each material blocking plate will be squeezed into the corresponding annular groove, and the annular groove is recessed into the interior of the rotor 3, so that the material entering the annular groove is stuck and cannot flow downward immediately, thereby reducing the overall flow rate of the material, so that the material is slowed down for a second time, and the grinding degree of the material is ensured.

[0036] In this embodiment, in the initial state, each material blocking plate is inclined downward toward the center direction so that the material can flow through the gap between adjacent material blocking plates along the material blocking plates without being retained on the material blocking plates. A gap is formed between the free end of each material blocking plate and the outer surface of the rotor 3, so that the material blocking plate has space to move toward the rotor 3. Each material blocking plate is fan-shaped. When each material blocking plate moves toward the rotor 3, the width of the gap between two circumferentially adjacent material blocking plates is reduced, thereby increasing the flow resistance of the material and then slowing down the flow speed of the material. On the contrary, when each material blocking plate moves in the direction away from the rotor 3, the flow resistance of the material can be reduced, thereby increasing the flow speed of the material.

[0037] Among them, the inclination direction of the annular groove is the same as the inclination direction of the material blocking plate. When the number of each group of material blocking plates is three, the number of corresponding annular grooves is also three. In this embodiment, the three annular grooves are an upper annular groove 301, a middle annular groove 302 and a lower annular groove 303 arranged from top to bottom. The upper annular groove 301 corresponds to the free end of the upper material blocking plate 8, the middle annular groove 302 corresponds to the free end of the middle material blocking plate 9, and the lower annular groove 303 corresponds to the free end of the lower material blocking plate 10.

[0038] Furthermore, the stator 2 is fixedly mounted on the material receiving box 1, and a material receiving area is formed between the stator 2 and the material receiving box 1. The material receiving box 1 is provided with a discharge pipe 101 connected to the material receiving area, that is, the ground material flows into the material receiving area and is finally discharged through the discharge pipe 101.

[0039] In the present embodiment, it also includes a plurality of force-applying members corresponding to the plurality of groups of material-blocking plates, each force-applying member is transmission-connected to the corresponding groups of material-blocking plates, the material-blocking plates are slidably plugged into the stator 2, and the different weights of the ground materials enable each force-applying member to drive the corresponding material-blocking plates to approach or move away from the rotor 3. That is, in the present embodiment, each material-blocking plate is driven to approach or move away from the rotor 3 by the force-applying members, thereby changing the flow rate of the material. The power source of the force-applying members is the weight of the material and the weight of the preparation device. Since the weight of the preparation device is constant, the change in the weight of the material can change the power source of the force-applying members. That is, the present invention creatively changes the flow rate of the material in the grinding area by changing the weight of the material.

[0040] Specifically, the force-applying member includes a plurality of support legs 5 that are slidably plugged with the material receiving box 1, and a plurality of support springs 6 are arranged between the support legs 5 and the bottom of the material receiving box 1 to elastically support the material receiving box 1. The number of the support legs 5 is not less than three so that it can stably support the preparation device, and the number of the support springs 6 is the same as the number of the support legs 5. Each support spring 6 is sleeved on the support leg 5 in a one-to-one correspondence. A support disc 501 is fixedly mounted on the support leg 5, and the bottom of the support spring 6 abuts against the top of the support disc 501, and the top of the support spring 6 abuts against the bottom of the material receiving box 1. The elastic support of the preparation device is realized by the compression elastic force of the support spring 6. Under the elastic action of the support spring 6, the preparation device can slide up and down along the support leg 5, thereby buffering the preparation device in operation and reducing noise.

[0041] The force-applying member also includes a plurality of limit plates 7 corresponding to the plurality of groups of material-blocking plates one by one, and each limit plate 7 is slidably plugged into the stator 2. A slide groove 202 is provided on the stator 2 that runs through the bottom thereof and corresponds to the plurality of limit plates 7 one by one. The limit plates 7 are slidably arranged in the corresponding slide groove 202 in the up-and-down direction. There are many forms of realizing the up-and-down sliding arrangement of the limit plates 7 in the prior art, which will not be described in detail. Each group of material-blocking plates is slidably engaged with the corresponding limit plates 7, wherein a coupling groove 701 is provided on the side of each limit plate 7 close to the material-blocking plate, and one side of each material-blocking plate engaged with the limit plate 7 A clamping plate 15 corresponding to the clamping groove is fixedly provided, and the clamping plate 15 is slidably clamped in the clamping groove 701. The clamping plate 15 and the clamping groove 701 are perpendicular to the material blocking plate. Because the material blocking plate is tilted downward toward the center direction of the rotor 3, the clamping plate 15 and the clamping groove 701 are tilted from bottom to top toward the center direction of the rotor 3. When relative sliding occurs between the limit plate 7 and the stator 2 in the up and down directions, the corresponding material blocking plate can be driven to approach and move away from the rotor 3, thereby changing the width of the interval between the circumferentially adjacent material blocking plates, so that the flow rate of the material is changed.

[0042] To be more specific, the driving motor is fixedly mounted on the material receiving box 1, and each limit plate 7 is fixedly connected to each support leg 5 in a one-to-one correspondence. When the weight of the material placed in the material guiding cavity 201 changes, the pressure on the support spring 6 changes, thereby causing the material receiving box 1, the stator 2, the rotor 3 and the driving motor to slide upward or downward along the support leg 5 (when the weight of the material increases, the material receiving box 1, the stator 2, the rotor 3 and the driving motor slide downward, and vice versa). When the material receiving box 1, the stator 2, the rotor 3 and the driving motor slide upward, the stator 2 drives each material blocking plate to slide upward along the corresponding clamping groove 701, and since the support legs 5 and the limit plates 7 are fixed, each material blocking plate slides in a direction away from the rotor 3, so that the width of the interval between the circumferentially adjacent material blocking plates is increased, thereby increasing the flow rate of the material; on the contrary, when the material receiving box 1, the stator 2, the rotor 3 and the driving motor slide downward, the flow rate of the material is reduced.

[0043] To this end, in this embodiment, during the grinding process, as the material is continuously discharged from the discharge pipe 101, the weight of the material is continuously reduced to extend the support spring 6. The extended support spring 6 pushes the receiving box 1, the stator 2, the rotor 3 and the drive motor to move upward at the same time so that each limit plate 7 pushes the corresponding material blocking plate to slide toward the center, so that the flow rate of the material is continuously reduced. Therefore, in this embodiment, as the grinding time increases, the flow rate of the material in the grinding interval can be automatically reduced without manual adjustment or adjustment through additional mechanical equipment, and the continuously decreasing flow rate can gradually enhance the grinding effect of the material.

[0044] At the same time, by controlling the amount of material flowing out of the discharge pipe 101, the flow rate of the material in the grinding zone can be controlled.

[0045] Due to the presence of the annular groove, when grinding is completed, some materials will remain in the annular groove and cannot be removed. Therefore, in this embodiment, as grinding progresses, after grinding is completed, when the material is completely discharged or nearly completely discharged from the discharge pipe 101, the free end of each material blocking plate slides into the corresponding annular groove (such as Figure 4 As shown in the figure, as the rotor 3 rotates, the material blocking plate will contact the material remaining in the annular groove, and under the action of centrifugal force, the remaining material can be removed from the annular groove, thereby realizing automatic cleaning of the annular groove.

[0046] Second embodiment:

[0047] An elastomer modified asphalt waterproof coating comprises 4%-5% by weight of styrene-butadiene block polymer, 0.85%-2.5% by weight of ethylene-vinyl acetate copolymer, 6%-7% by weight of graphite powder, and the remainder is base asphalt. The mixture of styrene-butadiene block polymer, ethylene-vinyl acetate copolymer and base asphalt is ground by any of the above-mentioned preparation devices and then graphite powder is added.

[0048] In this embodiment, styrene-butadiene block polymer, ethylene-vinyl acetate copolymer and base asphalt are mixed in proportion and stirred evenly to obtain a mixture, which is then placed in a preparation device for a single grinding. By utilizing the design of the above-mentioned preparation device, the mixture can be more fully ground, and 6%-7% by weight of graphite powder is added to the ground mixture and stirred evenly to obtain an elastomer-modified asphalt waterproof coating.

[0049] Adding graphite powder can improve the thermal conductivity of the entire asphalt coating. The increase in the thermal conductivity of the asphalt coating can improve the coating layer's ability to absorb solar energy, making the asphalt coating layer like a huge solar energy absorption panel, thereby being able to collect more solar energy, making it a new type of energy-utilizing material.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A preparation device for an elastomer-modified asphalt waterproof coating, comprising a stator (2) having a material guide cavity (201) formed therein and a rotor (3) disposed inside the material guide cavity (201), wherein a grinding zone is formed between the rotor (3) and the stator (2), and characterized in that: A material blocking plate is provided in the grinding zone to slow down the flow speed of the material in the grinding zone; The material blocking plates are divided into a plurality of groups, and the plurality of groups of material blocking plates are arranged at intervals in the circumferential direction around the axis of the rotor (3); each group of material blocking plates has a plurality of plates and are arranged at intervals up and down so that the grinding area forms a multi-level grinding layer from top to bottom; The outer surface of the rotor (3) is provided with a plurality of annular grooves arranged at intervals from top to bottom, each of the annular grooves corresponds to a free end of each material blocking plate in each group, and when the material passes between each grinding layer, it flows into the corresponding annular groove to slow down the flow speed of the material for a second time; It also includes a plurality of force-applying members corresponding to the plurality of groups of material-blocking plates, each of the force-applying members being in driving connection with the corresponding group of material-blocking plates, the material-blocking plates being slidably plugged into the stator (2), and each of the force-applying members driving the corresponding material-blocking plates to approach or move away from the rotor (3) according to the difference in weight of the material being ground; The stator (2) is fixedly mounted on the material receiving box (1), a material receiving area is formed between the stator (2) and the material receiving box (1), and a discharge pipe (101) connected to the material receiving area is provided on the material receiving box (1); The force-applying member comprises a plurality of support legs (5) slidably plugged into the material receiving box (1), and a plurality of support springs (6) are arranged between the support legs (5) and the bottom of the material receiving box (1) to elastically support the material receiving box (1); The force-applying member further comprises a plurality of limit plates (7) corresponding one to one with the plurality of groups of material-blocking plates, each of the limit plates (7) being slidably plugged into the stator (2), each group of the material-blocking plates being slidably engaged with the corresponding limit plates (7), and each of the limit plates (7) being fixedly connected one to one with each of the support legs (5), and when relative sliding occurs between the limit plates (7) and the stator (2) in the up-and-down directions, the corresponding material-blocking plates can be driven to approach and move away from the rotor (3).

2. The preparation device of the elastomer-modified asphalt waterproof coating according to claim 1, characterized in that: Each of the material blocking plates is inclined downward toward the center, a gap is formed between the free end of each of the material blocking plates and the outer surface of the rotor (3), and each of the material blocking plates is fan-shaped.

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