A modified emulsified asphalt production mill

Abstract

The present invention belongs to the technical field of grinding processing equipment, and specifically relates to a modified emulsified asphalt production mill, wherein a plurality of layers of grinding teeth 1 are distributed on the rotor grinding disc, and a plurality of layers of grinding teeth 2 are distributed on the stator grinding disc. The tooth surface 1 on the grinding tooth 1 is a multi-step tooth surface, and each step of the tooth surface of the tooth surface 1 is tilted and extended from the top side of the grinding tooth 1 toward the root side thereof, and the angle between the extension direction of each step of the tooth surface and the axial direction shows a trend of decreasing successively. The tooth surface 2 on the grinding tooth 2 is also a multi-step tooth surface, and each step of the tooth surface of the tooth surface 2 is tilted and extended from the top side of the grinding tooth 2 toward the root side thereof, and the angle between the extension direction of each step of the tooth surface and the axial direction shows a trend of increasing successively. The present invention can change the walking path and flow direction of the material between the grinding teeth by changing the tooth surface structure of the grinding teeth, increase the path length and the number of times it is sheared, and improve the overall quality of the product, such as grinding fineness and emulsification effect.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt grinding and processing equipment, in particular to a modified emulsified asphalt production mill. Background Art

[0002] Modified asphalt refers to an asphalt mixture that has been modified by adding modifiers such as rubber, resin, high molecular weight polymers, and finely ground rubber powder, or by subjecting the asphalt to a mild oxidation process to improve its properties. Modified emulsified asphalt is produced by adding polymer latex during the emulsified asphalt production process, mixing polymer latex with finished emulsified asphalt, or emulsifying polymer-modified asphalt to create a finished emulsified asphalt product.

[0003] The working principle of the asphalt production mill is to use a high-speed rotating motor to drive the rotor to rotate at high speed relative to the stator, so that the asphalt and other materials flowing into the gap between the grinding teeth of the stator and the grinding teeth of the rotor flow radially outward from the axis under the action of fluid pressure and centrifugal force. When passing through the gap between the grinding teeth on the stator and the rotor, they are subjected to strong shear force, friction, high-frequency mechanical vibration, vortex inertia impact and other mechanical effects, and are ground, fragmented, dispersed, homogenized and emulsified, thereby realizing the emulsified mixing production of soap solution and asphalt.

[0004] In existing asphalt production mills, the grinding teeth of the grinding disc mounted on the stator and the grinding teeth of the grinding disc mounted on the rotor are both inclined, and the tooth profiles of the two are identical, both being inclined plane grinding teeth. See, for example, the technical solutions disclosed in patent documents with publication (announcement) number CN109174298A, entitled "A Double-Sided Tooth Double-Grinding Chamber Colloid Mill" and publication (announcement) number CN211385222U, entitled "A Rubber Powder Asphalt Mill." Furthermore, the grinding teeth on the tooth surfaces of existing asphalt production mills are basically arranged in radial alignment, with one circle of grinding teeth and one circle of channels. This poses the problem of asphalt easily flowing directly out of the channels without flowing through the grinding teeth, which adversely affects the grinding effect of the asphalt and results in relatively large particles in the emulsified asphalt product.

[0005] To reduce the particle size of ground asphalt, the primary approach is to increase the number and arrangement of grinding teeth, thereby increasing friction density. Furthermore, the gap between the meshing surfaces of the stator and rotor teeth in existing asphalt mills remains essentially constant after the rotor's axial position is fixed. Therefore, the gap between the teeth varies very slightly during the grinding process and is related to the mechanical clearance after assembly. This results in a narrow viscosity range for asphalt suitable for production, and the production of relatively high-viscosity asphalt can easily lead to problems such as mill blockage, high scrap rates, and significantly increased energy consumption. To better accommodate the production of larger-particle asphalt feedstocks, colloidal feedstocks, or asphalts of varying viscosities, the mill must be shut down to adjust the axial gap between the stator and rotor surfaces. This requires waiting for the mill body temperature to cool to a suitable range before the locking nut can be manually opened and the nuts located in front and behind the bearings can be manually rotated to adjust the gap between the stator and rotor. This entire process is time-consuming and significantly impacts production efficiency. Summary of the Invention

[0006] The modified emulsified asphalt production mill provided by the present invention can change the walking path and flow direction of materials such as asphalt between the grinding teeth by changing the tooth surface structure of the grinding teeth, thereby increasing the path length of the material and the number of times the material is sheared, helping to extend the mixing time of the material in the grinding chamber and increase the number of decomposition and synthesis in the grinding chamber, thereby improving the grinding fineness.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a modified emulsified asphalt production mill, including a grinding chamber unit. A matching rotor and stator are provided in the grinding chamber unit, a rotor grinding disc is fixed on the rotor, and a stator grinding disc is fixed on the stator. Multiple circles / multiple layers of grinding teeth 1 are distributed around the axial hole 1 on the rotor grinding disc, and each circle / each layer contains multiple grinding teeth 1, and the grinding teeth 1 in each layer are distributed alternately along the corresponding circumferential direction. Multiple circles / multiple layers of grinding teeth 2 are distributed around the axial hole 2 on the stator grinding disc, and each circle / each layer contains multiple grinding teeth 2, and the grinding teeth 2 in each layer are distributed alternately along the corresponding circumferential direction. After the rotor grinding disc and the stator grinding disc are relatively matched, the grinding teeth 1 can mesh and match with the grinding teeth 2 to realize the production process of mixing and grinding the materials flowing through the grinding teeth.

[0008] The tooth surfaces 1 on both sides of the grinding tooth 1 are both stepped multi-step tooth surfaces, and each step tooth surface of the tooth surface 1 is obliquely extended from the top side of the grinding tooth 1 toward its root side, and the angles between the extension directions of each step tooth surface from the top to the root and the axial direction are respectively decreasing; correspondingly, the tooth surfaces 2 on both sides of the grinding tooth 2 are also stepped multi-step tooth surfaces, and each step tooth surface of the tooth surface 2 is obliquely extended from the top side of the grinding tooth 2 toward its root side, and the angles between the extension directions of each step tooth surface from the top to the root and the axial direction are respectively increasing.

[0009] The order number on the tooth surface one is consistent with the order number on the tooth surface two.

[0010] The top surface of the first grinding tooth and the top surface of the second grinding tooth can be a plane, an inclined surface, or a convex surface in an inverted "V" shape.

[0011] Optionally, the order of tooth surface one and the order of tooth surface two are both three or more, that is, tooth surface one and tooth surface two are both formed into three-step or four-step zigzag stepped inclined surfaces with continuously connected tooth surfaces of each step.

[0012] Optionally, from the top to the root of the grinding tooth one, the angles between the extension direction of the third-order tooth surface on the tooth surface one and the axial direction are respectively in the range of ≥60 degrees and <90 degrees, ≥45 degrees and <60 degrees, and ≥30 degrees and <45 degrees.

[0013] Optionally, from the top to the root of the grinding tooth 2, the angles between the extension direction of the third-order tooth surface on the tooth surface 2 and the axial direction are respectively in the range of ≥30 degrees and <45 degrees, ≥45 degrees and <60 degrees, and ≥60 degrees and <90 degrees.

[0014] Optionally, in the multi-layered first grinding teeth distributed on the rotor grinding disc, each layer contains the same number of first grinding teeth. In the multi-layered second grinding teeth distributed on the stator grinding disc, each layer contains the same number of second grinding teeth.

[0015] Optionally, in the multiple layers of grinding teeth one distributed on the rotor grinding disc, the number of grinding teeth one contained in each layer is different or partially the same.

[0016] Optionally, in the multiple layers of grinding teeth 2 distributed on the stator grinding disc, the number of grinding teeth 2 contained in each layer is different or partially the same.

[0017] The circumferential extension lengths of the grinding teeth 1 can be the same, or different, or partially the same. The circumferential extension lengths of the grinding teeth 2 can also be the same, or different, or partially the same.

[0018] Optionally, the grinding teeth 1 in two adjacent layers are staggered between the multiple layers of grinding teeth 1 distributed on the rotor grinding disc, so that the circumferential spacing between two adjacent grinding teeth 1 in each layer can be shielded from each other.

[0019] Optionally, between the multiple layers of grinding teeth 2 distributed on the stator grinding disc, the grinding teeth 2 in two adjacent layers are staggered, so that the circumferential spacing between two adjacent grinding teeth 2 in each layer can be shielded from each other.

[0020] Optionally, the shapes of the tooth surfaces 1 of the grinding teeth 1 distributed in each layer on the rotor grinding disc are all different or partially the same.

[0021] Optionally, the shapes of the tooth surfaces 2 of the grinding teeth 2 distributed in each layer on the stator grinding disc are all different or partially the same.

[0022] Optionally, it also includes a heat transfer oil heating lumen, an asphalt delivery lumen, a soap liquid delivery lumen and an asphalt soap liquid mixing end.

[0023] The heat transfer oil heating lumen, the asphalt delivery lumen and the soap liquid delivery lumen are compounded to form a coaxial pipe, with the heat transfer oil heating lumen surrounded by the outer layer, the asphalt delivery lumen as the middle layer, and the soap liquid delivery lumen as the inner layer.

[0024] The asphalt-soap mixing unit includes an asphalt-feed check valve, a soap-soap-feed check valve, and a mixing chamber. The inner end of the valve channel of the asphalt-feed check valve intersects perpendicularly with the inner end of the valve channel of the soap-soap-feed check valve and extends to the mixing chamber's feed port. The mixing chamber's output port is fixedly connected to the grinding chamber housing and, through the grinding chamber, connects to two axial holes on the stator grinding disc. The asphalt delivery lumen is connected to the inlet of the asphalt-feed check valve, while the soap-soap delivery lumen is connected to the inlet of the soap-soap-soap-feed check valve.

[0025] Optionally, it further includes a pressure regulating valve provided on the outer shell and connected to the grinding chamber.

[0026] Optionally, a servo gap adjustment unit is further included that matches the rotating shaft that drives the rotor grinding disc to rotate.

[0027] The servo clearance adjustment unit includes a servo motor, a worm gear transmission assembly, and a spiral ring. The servo motor matches the worm in the worm gear transmission assembly, and the outer peripheral surface of the spiral ring meshes with the worm in the worm gear transmission assembly.

[0028] An external thread section is formed on the shaft at the input end side of the shaft and near the bearing seat. The external thread section matches the spiral ring portion, so that the rotation of the spiral ring portion can drive the external thread section to produce axial movement, or in other words, drive the shaft to move axially.

[0029] The beneficial effects of the present invention are as follows: by changing the tooth surface structure of the grinding teeth, the present invention can change the walking path and flow direction of materials such as asphalt between the grinding teeth, increase the path length of the material and increase the number of times the material is sheared, help to extend the mixing time of the material in the grinding chamber and increase the number of decomposition and synthesis in the grinding chamber, improve the mixing ability of the mill, improve the homogenization effect, and increase the grinding fineness of the obtained product.

[0030] By changing the relative distribution positions of the grinding teeth in each layer and in the inner and outer circles, the grinding teeth in two adjacent layers are arranged crosswise to block the gap between the two adjacent grinding teeth in the circumferential direction, and the flow channel and path of the emulsified asphalt material are changed, which can promote the automatic generation of pressure in the grinding chamber, inhibit gasification, and further improve the emulsification effect.

[0031] Setting different tooth surface structures for the tooth profile matching of the grinding teeth in different layers and different circles, and / or differentiating the size of the circumferential gap between the grinding teeth can overcome the viscous mixing characteristics of soap solution and asphalt. It is not only suitable for the production of high-viscosity asphalt, but also can better achieve multi-level refinement, and can further increase the content of emulsified asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the external structure of the present invention.

[0033] Figure 2 Schematic diagram of the internal structure of the grinding chamber unit in the present invention.

[0034] Figure 3 Schematic diagram of the structure of the stator grinding disc.

[0035] Figure 4 Schematic diagram of the matching structure of the stator grinding disc and the rotor grinding disc.

[0036] Figure 5 for Figure 4 Schematic diagram of the locally enlarged structure at point A in the middle.

[0037] Figure 6 Schematic diagram of the transmission mechanism of the servo gap adjustment unit.

[0038] In the figure: 10 grinding chamber unit, 11 housing, 12 rotor grinding disc, 121 shaft hole 1, 1211 rotating shaft, 1212 external thread segment, 122 grinding tooth 1, 1221 tooth surface 1, 4 first-order tooth surface z, 5 second-order tooth surface z, 6 third-order tooth surface z, 13 stator grinding disc, 131 shaft hole 2, 132 grinding tooth 2, 1321 tooth surface 2, 1 first-order tooth surface d, 2 second-order tooth surface d, 3 third-order tooth surface d, 14 heat transfer oil injection end, 15 temperature sensor 1; 20 asphalt feeding one-way valve part, 21 temperature sensor 2; 30 soap liquid feeding one-way valve part, 31 temperature sensor 3; 40 mixing chamber part; 50 pressure regulating valve; 60 servo gap adjustment unit, 61 worm, 62 turbine, 63 screw ring part. DETAILED DESCRIPTION

[0039] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "front", "back", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0040] like Figures 1 to 5 The modified emulsified asphalt production mill shown includes a grinding chamber unit 10, an asphalt feeding one-way valve portion 20, a soap liquid feeding one-way valve portion 30, a mixing chamber portion 40, a pressure regulating valve 50 and a servo gap adjustment unit 60.

[0041] A matching rotor and stator are provided within the outer shell 11 of the grinding chamber unit 10. A rotor grinding disc 12 is fixed to the rotor, and a stator grinding disc 13 is fixed to the stator. Multiple radially spaced rings / layers of grinding teeth 122 are distributed around the outer periphery of the axial hole 121 of the rotor grinding disc 12, with each ring / layer containing multiple first grinding teeth 122. Multiple radially spaced rings / layers of grinding teeth 132 are distributed around the outer periphery of the axial hole 131 of the stator grinding disc 13, with each ring / layer containing multiple second grinding teeth 132. After the rotor grinding disc 12 and the stator grinding disc 13 are installed in the grinding chamber of the outer shell 11, the first grinding teeth 122 mesh with the second grinding teeth 132, enabling mixing and grinding of materials such as asphalt flowing between the two grinding teeth.

[0042] The thermal oil heating lumen, asphalt delivery lumen, and soap liquid delivery lumen are combined to form a coaxial pipe, with the thermal oil heating lumen surrounding the outer layer, the asphalt delivery lumen forming the middle layer, and the soap liquid delivery lumen forming the inner layer. This lumen is connected to the asphalt soap liquid mixing port / asphalt soap liquid mixer formed by the asphalt inlet check valve 20, the soap liquid inlet check valve 30, and the mixing chamber 40. Specifically, the asphalt delivery lumen is connected to the inlet of the asphalt inlet check valve 20, and the soap liquid delivery lumen is connected to the inlet of the soap liquid inlet check valve 30.

[0043] The inner end of the valve passage of the asphalt inlet check valve 20 and the inner end of the valve passage of the soap liquid inlet check valve 30 intersect perpendicularly (including both absolutely perpendicular and relatively perpendicular states, generally with the axis angle between the two valve passages ranging from 80 to 90 degrees), and both extend through the inlet port of the mixing chamber 40. The outlet port of the mixing chamber 40 is connected to and through the second axial hole 131 formed in the stator grinding disc 13.

[0044] The above-mentioned improvements to the asphalt and soap liquid mixing method can directly enhance the mill's emulsification capacity, enabling the production of emulsified asphalt with a softening point exceeding 90 degrees Celsius. This effectively overcomes the existing difficulty in emulsified asphalt, which generally has a softening point of around 75 degrees Celsius. Compared to the existing method of transporting asphalt and soap liquid separately through pipelines, the above-mentioned improvements to the asphalt and soap liquid mixing method can reduce the mixing distance, improve the uniformity and stability of the mixing pressure, and promote the formation of a high-temperature, atomized state, or a gas-liquid mixture, during the transport process. Furthermore, when the asphalt-soap liquid mixing end contacts the asphalt, the surface area of the soap liquid and asphalt mixture is increased, allowing the asphalt to instantly approach a foamy state and achieve better emulsification. Therefore, the improvements to the asphalt and soap liquid transport and mixing method can shorten the mixing distance, achieve uniform mixing pressure, stabilize and ensure a reliable production process, and increase the mixing area of the asphalt and soap liquid, achieving an atomized premixing effect and improving emulsification quality.

[0045] The pressure regulating valve 50 is fixedly mounted on the housing 11. The pressure regulating valve 50 is in communication with the grinding chamber of the grinding chamber unit 10 and is capable of regulating the pressure state in the grinding chamber.

[0046] The servo gap adjustment unit 60 is fixed to the frame and is compatible with the rotating shaft 1211 that drives the rotor grinding disc 12 to rotate. The servo gap adjustment unit 60 includes a servo motor, a worm gear transmission assembly, and a spiral ring portion 63. The servo motor is compatible with the worm gear 61 in the worm gear transmission assembly, and the outer circumference of the spiral ring portion 63 meshes with the worm gear 62 in the worm gear transmission assembly.

[0047] An external thread section 1212 is formed on the rotating shaft 1211 at a position near the input end of the rotating shaft 1211 and near the bearing seat. The external thread section 1212 matches the spiral ring portion 63, so that when the spiral ring portion 63 is driven by the turbine 62 to rotate, the spiral ring portion 63 can be driven to rotate synchronously and the rotating shaft 1211 can be driven to move in the axial direction, thereby realizing servo adjustment of the axial position of the rotor grinding disc 12, that is, it helps to achieve the purpose of servo adjustment of the relative surface distance / gap size between the rotor grinding disc 12 and the stator grinding disc 13 by the control unit according to changes in parameters such as temperature, pressure, and current of the mill, thereby better controlling the production process and ensuring the quality of the products being produced.

[0048] The above-mentioned structure of adjusting the gap size between the rotor grinding disc 12 and the stator grinding disc 13 by servo control can greatly shorten the adjustment time and improve the working efficiency compared with the existing technology which requires stopping the machine and cooling down sufficiently, then manually turning the back nut of the bearing seat of the rotating shaft 1211 by opening the locking nut.

[0049] The worm gear transmission mechanism slows down and increases the distance of the rotational force of the servo motor and converts it into the rotational force of the thread, while also using the self-locking function of the worm gear. The servo motor accurately adjusts the gap, which has the advantage that in the working state, the servo motor drives the worm 61 to rotate, the worm 61 drives the worm wheel 62 to rotate, and the worm wheel 62 drives the spiral ring part 63 to rotate, thereby rotating and moving the internal thread surface of the spiral ring part 63, and the internal thread surface can drive the bearing seat / bearing chamber to move, thereby achieving gap adjustment in the working state. The spiral ring part 63 can be understood as an implementation scenario that includes a spiral ring body; it can also be understood as an implementation scenario that includes multiple spiral ring bodies. At this time, the turbine 62 corresponding to the spiral ring part 63 can be directly matched with the multiple spiral ring bodies, or it can be indirectly matched.

[0050] The housing 11 is provided with a heat transfer oil injection port 14 for supplying heat transfer oil to the outer cavity of the housing 11 for heating, thereby regulating the temperature within the grinding chamber. A temperature sensor 15 is also provided on the housing 11 for detecting the temperature of the emulsified asphalt mixture formed by asphalt and soap solution within the grinding chamber and providing feedback to the control unit.

[0051] A second temperature sensor 21 is provided on the asphalt inlet check valve 20, and a third temperature sensor 31 is provided on the soap liquid inlet check valve 30. The second and third temperature sensors 21 and 31 are used to detect the asphalt inlet temperature and the soap liquid inlet temperature, respectively, and are both connected to a control unit to provide feedback of the corresponding temperature data.

[0052] like Figure 4 、 Figure 5 As shown, both side tooth surfaces 1221 on the grinding tooth 122 are three-step tooth surfaces, and the three-step tooth surfaces of the tooth surface 1221 include the illustrated first-step tooth surface z4, second-step tooth surface z5, and third-step tooth surface z6. Each step tooth surface on the tooth surface 1221 extends obliquely from the top of the grinding tooth 122 toward the root of the grinding tooth 122, and the angles formed between the extension directions of each step tooth surface and the axial direction (of the rotor grinding disc 12) decrease in magnitude from the top to the root. Specifically, the angle formed between the first-step tooth surface z4 and the axial direction is b3, the angle formed between the second-step tooth surface z5 and the axial direction is b2, and the angle formed between the third-step tooth surface z6 and the axial direction is b1. The angle b3 is greater than the angle b2, and the angle b2 is greater than the angle b1.

[0053] Correspondingly, both side tooth surfaces 1321 of the second grinding tooth 132 are three-step tooth surfaces, and the three-step tooth surfaces of the second tooth surface 1321 include the illustrated first-step tooth surface d1, second-step tooth surface d2, and third-step tooth surface d3. Each step tooth surface on the second tooth surface 1321 extends obliquely from the top of the second grinding tooth 132 toward the root of the second grinding tooth 132, and the angles formed between the extension directions of each step tooth surface from the top to the root and the axial direction (of the stator grinding disc 13) increase in magnitude. That is, the angle formed between the first-step tooth surface d1 and the axial direction is a1, the angle formed between the second-step tooth surface d2 and the axial direction is a2, and the angle formed between the third-step tooth surface d3 and the axial direction is a3. The angle a1 is smaller than the angle a2, and the angle a2 is smaller than the angle a3.

[0054] The tooth surface 1221 on the first grinding tooth 122 and the tooth surface 2 1321 on the second grinding tooth 132 are both formed as three-step continuous and zigzag stepped inclined surfaces. After the rotor grinding disc 12 and the stator grinding disc 13 are coaxially mounted, a plurality of continuously changing radial gap intervals can be formed between the tooth surface 1221 of the first grinding tooth 122 and the tooth surface 2 1321 of the second grinding tooth 132. Figures 4 and 5 As shown, along the direction of the arrow in the figure, the mixture of asphalt, soap solution, etc. enters the end surface gap between the rotor grinding disc 12 and the stator grinding disc 13 from the second shaft hole 131. In the radial flow direction shown by the arrow, the mixture first climbs from the root of the second grinding tooth 132 toward the top / end of the second grinding tooth 132, and then climbs from the top of the second grinding tooth 132 toward the root of the second grinding tooth 132 (in other words, then climbs from the root of the first grinding tooth 122 toward the top / end of the first grinding tooth 122). This cycle is repeated, and finally the mixture continuously flows from the axial center position of the grinding disc to the outer peripheral side of the grinding disc, realizing the mixing, grinding and other processes.

[0055] Therefore, as the mixed material flows radially, the size of the multiple gaps between the opposing tooth surfaces decreases / narrows as it passes through the relative tooth surface gap between tooth surface 1221 and tooth surface 2 1321 and climbs from the root of tooth 2 132 toward the top of tooth 2 132. Conversely, as the mixed material passes through the relative tooth surface gap between tooth surface 1221 and tooth surface 2 1321 and climbs from the root of tooth 1 122 toward the top of tooth 1 122, the size of the multiple gaps between the opposing tooth surfaces increases / widens as it passes through the relative tooth surface gap between tooth surface 1221 and tooth surface 2 1321 and climbs from the root of tooth 1 122 toward the top of tooth 1 122. This process repeats in sequence. Ultimately, this not only extends the radial path of the mixed material and the mixing and grinding time of the mixed material in the grinding chamber, but also promotes the mixed material to undergo multiple cyclic shearing and dispersion-synthesis processes along the radial flow path, thereby promoting the mixing and homogenization of the mixed material. Therefore, the technical solution of the present invention can improve the mixing ability and emulsification effect of the mill and improve the grinding fineness of the obtained asphalt product.

[0056] The first tooth surface 1221 may have two steps, and correspondingly, the second tooth surface 1321 also has two steps. Preferably, the first tooth surface 1221 and the second tooth surface 1321 both have three steps or more.

[0057] From the top to the root of the first grinding tooth 122, the angles between the extension direction of the third-step tooth surface on the first tooth surface 1221 and the axial direction are, respectively, in the range of 60 degrees to 90 degrees (exclusive), 45 degrees to 60 degrees (exclusive), and 30 degrees to 45 degrees (exclusive). This allows the angle b3 to be 60 degrees or 63 degrees, the angle b2 to be 45 degrees or 50 degrees, and the angle b1 to be 30 degrees or 40 degrees.

[0058] From the top to the root of the second grinding tooth 132, the angles between the extension direction of the third-step tooth surface on the second tooth surface 1321 and the axial direction are, respectively, in the range of 30 degrees to 45 degrees (exclusive), 45 degrees to 60 degrees (exclusive), and 60 degrees to 90 degrees (exclusive). This allows the angle a1 to be 30 degrees or 32 degrees, the angle a2 to be 45 degrees or 48 degrees, and the angle a3 to be 60 degrees or 65 degrees.

[0059] The angle b3 can be set to 60 degrees, the angle b2 to 45 degrees, and the angle b1 to 30 degrees. Furthermore, the angle a1 can be set to 30 degrees, the angle a2 to 45 degrees, and the angle a3 to 60 degrees. Even though the values of the three angles between the extending direction of the third-order tooth surface on tooth surface 1221 and the axial direction are the same as the values of the three angles between the extending direction of the third-order tooth surface on tooth surface 2 1321 and the axial direction, the directions of change are opposite.

[0060] In other embodiments, the angle b3 can be 60 degrees, the angle b2 can be 45 degrees or 46 degrees, and the angle b1 can be 30 degrees. Furthermore, the angle a1 can be 31 degrees, the angle a2 can be 45 degrees, and the angle a3 can be 62 degrees. That is, the three angles between the extension direction of the third-order tooth surface on tooth surface 1221 and the axial direction can be completely inconsistent or inconsistent with the three angles between the extension direction of the third-order tooth surface on tooth surface 2 1321 and the axial direction.

[0061] like Figure 3 As shown, among the four layers of grinding teeth 132 distributed on the stator grinding disc 13, each layer contains the same number of grinding teeth 132. Similarly, among the four layers of grinding teeth 122 distributed on the rotor grinding disc 12, each layer contains the same number of grinding teeth 122. At the same time, between the multiple layers of grinding teeth 122 distributed on the rotor grinding disc 12, the grinding teeth 122 in two adjacent layers are staggered with each other, so that the circumferential spacing between the two adjacent grinding teeth 122 in each layer can be blocked from each other, forming a "bow"-shaped arrangement layout, which can enable the mixed material formed by asphalt and soap solution to receive more sufficient passive work when passing through each layer of grinding teeth, which helps to promote better asphalt emulsification effect; and between the multiple layers of grinding teeth 2 132 distributed on the stator grinding disc 13, the grinding teeth 2 132 in two adjacent layers are staggered with each other, which can enable the circumferential spacing between the two adjacent grinding teeth 2 132 in each layer to be blocked from each other, forming a "bow"-shaped arrangement layout, which can enable the mixed material formed by asphalt and soap solution to receive more sufficient passive work when passing through each layer of grinding teeth, which helps to promote better asphalt emulsification effect.

[0062] As described above, by varying the relative positions of the first grinding teeth 122 and / or the second grinding teeth 132 within each layer and within each inner and outer ring, even if the first grinding teeth 122 within two adjacent layers / rings are arranged in a cross / staggered relative configuration, and the second grinding teeth 132 within two adjacent layers / rings are arranged in a cross / staggered relative configuration, the circumferential gaps between adjacent grinding teeth (i.e., between the first grinding teeth 122 and between the second grinding teeth 132) on the circumferential direction of the two grinding discs are blocked, thereby altering the flow channel structure and path of the emulsified asphalt material. Combined with the multi-stepped, stepped slope structure formed on the tooth surfaces, this further promotes the automatic generation of a high pressure buildup within the grinding chamber, inhibiting vaporization of soap or water, preventing clogging, and improving shearing, mixing, homogenization, and emulsification effects. This further ensures stable and smooth production and enhances the overall quality of the resulting product.

[0063] In other embodiments, the number of grinding teeth 122 contained in each of the four layers of grinding teeth 122 distributed on the rotor grinding disc 12 may be different, or the number of grinding teeth 122 contained in some adjacent or non-adjacent layers may be the same, for example, the number of grinding teeth 122 contained in two layers may be 8 respectively, and the number of grinding teeth 122 contained in the other two layers may be 10 and 11 respectively, etc.

[0064] In other embodiments, the number of grinding teeth 132 contained in each of the four layers of grinding teeth 132 distributed on the stator grinding disc 13 may be different, or the number of grinding teeth 132 contained in some adjacent or non-adjacent layers may be the same, such as the number of grinding teeth 132 contained in two layers may be 8 respectively, and the number of grinding teeth 132 contained in the other two layers may be 10 and 9 respectively.

[0065] In other embodiments, it is also possible to stagger the grinding teeth 122 in two adjacent layers of the multi-layer grinding teeth 122 distributed on the rotor grinding disc 12, so that the circumferential spacing between adjacent grinding teeth 122 in each layer is mutually shielded. Correspondingly, as in the prior art, the grinding teeth 132 in the multi-layer grinding teeth 132 distributed on the stator grinding disc 13 are arranged in a uniform radial direction and form multiple rows distributed around the circumference. Alternatively, it is possible to stagger the grinding teeth 132 in two adjacent layers of the multi-layer grinding teeth 132 distributed on the stator grinding disc 13, so that the circumferential spacing between adjacent grinding teeth 132 in each layer is mutually shielded. Correspondingly, as in the prior art, the grinding teeth 122 in the multi-layer grinding teeth 122 distributed on the rotor grinding disc 12 are arranged in a uniform radial direction and form multiple rows distributed around the circumference.

[0066] As described above, only the first grinding teeth 122 on the rotor grinding disc 12 are arranged in a staggered manner, or only the second grinding teeth 132 on the stator grinding disc 13 are arranged in a staggered manner. This can also be associated with the multi-step stepped inclined surface structure formed on the tooth surface of the grinding teeth, thereby promoting the automatic pressure buildup of the mixed material in the grinding chamber, suppressing the degree of gasification, and further improving the emulsification effect.

[0067] The above-mentioned embodiment of staggered distribution of the grinding teeth (grinding teeth 122 and / or grinding teeth 2 132) of each layer should be understood to include a state in which each grinding tooth in a certain layer completely blocks the circumferential distance between each adjacent grinding tooth in the adjacent layer (see Figure 3 The present invention also includes the situation shown in the figure), as well as the situation in which the teeth in a certain layer partially obstruct the circumferential spacing between two adjacent teeth in the adjacent layer, and the situation of a mixture of the above two situations. Making the obstruction state between the teeth non-uniform but with certain differences helps to better inhibit blockage, promote the fluidity / flowability of mixed materials such as asphalt between the teeth, and achieve a homogenizing effect. It can adapt to the production of larger particles and higher viscosity asphalt, and achieve the production goals of improving the homogenization and emulsification effect and increasing the fineness of grinding. Therefore, the preferred obstruction state between the teeth is a mixture of complete obstruction and partial obstruction.

[0068] The shapes of the tooth surfaces 1221 of the grinding teeth 122 distributed in each layer on the rotor grinding disc 12 can be different or partially the same. Figure 4 、 Figure 5 (The grinding disc is provided with three or four layers of grinding teeth.) The tooth surfaces 1221 of one or two layers of grinding teeth 122 near the shaft hole 121 can be formed in an embodiment in which the included angle b3 is 60 degrees, the included angle b2 is 45 degrees, and the included angle b1 is 30 degrees. Meanwhile, the tooth surfaces 1221 of the other layers can be formed in an embodiment in which the included angle b3 is 63 degrees, the included angle b2 is 47 degrees, and the included angle b1 is 31 degrees. Alternatively, the tooth surfaces 1221 can have more various forms.

[0069] The shapes of the second tooth surfaces 1321 of the second grinding teeth 132 distributed in each layer on the stator grinding disc 13 may be different or partially the same. Figure 4 、 Figure 5(The grinding disc is provided with three or four layers of grinding teeth.) The tooth surfaces 1321 of one or two layers of second grinding teeth 132 near the second shaft hole 131 can be formed to have an included angle a1 of 31 degrees, an included angle a2 of 48 degrees, and an included angle a3 of 63 degrees. Meanwhile, the tooth surfaces 1321 of other layers can be formed to have an included angle a1 of 30 degrees, an included angle a2 of 45 degrees, and an included angle a3 of 60 degrees, etc. Alternatively, the tooth surfaces 1321 can have more various shapes.

[0070] As described above, matching the tooth shapes of the grinding teeth in different layers / different circles (the shape of tooth surface one 1221 and / or the shape of tooth surface two 1321) with different stepped structures, and / or simultaneously setting the size of the circumferential gap between the grinding teeth differently, can overcome the viscous mixing characteristics of soap solution and asphalt, better achieve multi-level refinement, and further increase the content of emulsified asphalt.

[0071] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept. Those skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed by the present invention shall be covered by the claims of the present invention.

Claims

1. A modified emulsified asphalt production mill, comprising a grinding chamber unit (10); a matching rotor and stator are provided in the grinding chamber unit (10); a rotor grinding disc (12) is fixedly provided on the rotor, and a stator grinding disc (13) is fixedly provided on the stator; multiple layers of grinding teeth (122) are distributed around the outer periphery of the axial hole (121) on the rotor grinding disc (12), and each layer contains multiple grinding teeth (122); multiple layers of grinding teeth (132) are distributed around the outer periphery of the axial hole (131) on the stator grinding disc (13), and each layer contains multiple grinding teeth (132); after the rotor grinding disc (12) and the stator grinding disc (13) are relatively matched, the grinding teeth (122) can mesh with the grinding teeth (132); the characteristics are: The tooth surfaces 1 (1221) on both sides of the grinding tooth 1 (122) are both multi-step tooth surfaces, and each step tooth surface of the tooth surface 1 (1221) is tilted and extended from the top side of the grinding tooth 1 (122) toward the root side thereof, and the angles between the extension directions of each step tooth surface from the top to the root and the axial direction are successively reduced; correspondingly, the tooth surfaces 2 (1321) on both sides of the grinding tooth 2 (132) are both multi-step tooth surfaces, and each step tooth surface of the tooth surface 2 (1321) is tilted and extended from the top side of the grinding tooth 2 (132) toward the root side thereof, and the angles between the extension directions of each step tooth surface from the top to the root and the axial direction are successively increased.

2. A modified emulsified asphalt production mill according to claim 1, characterized in that: The order of tooth surface one (1221) and the order of tooth surface two (1321) are both three or more.

3. A modified emulsified asphalt production mill according to claim 2, characterized in that: The order of tooth surface one (1221) and the order of tooth surface two (1321) are both three orders; from the top of grinding tooth one (122) to its root, the angle between the extension direction of the three-order tooth surface on tooth surface one (1221) and the axial direction is successively taken in the range of ≥60 degrees and <90 degrees, ≥45 degrees and <60 degrees, and ≥30 degrees and <45 degrees; from the top of grinding tooth two (132) to its root, the angle between the extension direction of the three-order tooth surface on tooth surface two (1321) and the axial direction is successively taken in the range of ≥30 degrees and <45 degrees, ≥45 degrees and <60 degrees, and ≥60 degrees and <90 degrees.

4. The modified emulsified asphalt production mill according to claim 1, characterized in that: In the multi-layer grinding teeth 1 (122) distributed on the rotor grinding disc (12), each layer contains the same number of grinding teeth 1 (122); in the multi-layer grinding teeth 2 (132) distributed on the stator grinding disc (13), each layer contains the same number of grinding teeth 2 (132).

5. The modified emulsified asphalt production mill according to claim 1, characterized in that: In the multi-layer grinding teeth (122) distributed on the rotor grinding disc (12), the number of grinding teeth (122) contained in each layer is different or partially the same; and / or in the multi-layer grinding teeth (132) distributed on the stator grinding disc (13), the number of grinding teeth (132) contained in each layer is different or partially the same.

6. A modified emulsified asphalt production mill according to any one of claims 1 to 5, characterized in that: Between the multiple layers of grinding teeth 1 (122) on the rotor grinding disc (12), the grinding teeth 1 (122) in two adjacent layers are staggered to each other, so that the circumferential spacing between the two adjacent grinding teeth 1 (122) in each layer can be shielded from each other; and / or between the multiple layers of grinding teeth 2 (132) on the stator grinding disc (13), the grinding teeth 2 (132) in two adjacent layers are staggered to each other, so that the circumferential spacing between the two adjacent grinding teeth 2 (132) in each layer can be shielded from each other.

7. A modified emulsified asphalt production mill according to any one of claims 1 to 5, characterized in that: The shapes of the tooth surfaces 1 (1221) of the grinding teeth 1 (122) distributed in each layer on the rotor grinding disc (12) are all different or partially the same; and / or the shapes of the tooth surfaces 2 (1321) of the grinding teeth 2 (132) distributed in each layer on the stator grinding disc (13) are all different or partially the same.

8. The modified emulsified asphalt production mill according to claim 1, characterized in that: It also includes a heat transfer oil heating lumen, an asphalt delivery lumen, a soap liquid delivery lumen and an asphalt soap liquid mixing end; The heat transfer oil heating lumen, the asphalt delivery lumen and the soap liquid delivery lumen are combined to form a coaxial pipeline, with the heat transfer oil heating lumen surrounded by the outer layer, the asphalt delivery lumen as the middle layer, and the soap liquid delivery lumen as the inner layer; The asphalt soap liquid mixing end comprises an asphalt feeding one-way valve portion (20), a soap liquid feeding one-way valve portion (30) and a mixing chamber portion (40); the inner end of the valve passage of the asphalt feeding one-way valve portion (20) and the inner end of the valve passage of the soap liquid feeding one-way valve portion (30) vertically intersect and simultaneously pass through the feeding port of the mixing chamber portion (40); the output port of the mixing chamber portion (40) is fixedly connected to the outer shell (11) of the grinding chamber unit (10) and passes through the grinding chamber and the second shaft hole (131); The asphalt delivery lumen is connected to the inlet end of the asphalt delivery one-way valve portion (20), and the soap liquid delivery lumen is connected to the inlet end of the soap liquid delivery one-way valve portion (30).

9. A modified emulsified asphalt production mill according to claim 8, characterized in that: It also includes a pressure regulating valve (50) which is arranged on the housing (11) and communicates with the grinding chamber.

10. The modified emulsified asphalt production mill according to claim 1, characterized in that: It also includes a servo gap adjustment unit (60) matched with a rotating shaft (1211) that drives the rotor grinding disc (12) to rotate; The servo gap adjustment unit (60) includes a servo motor, a worm gear transmission assembly and a screw ring portion (63); The servo motor is matched with the worm (61) in the worm gear transmission assembly, and the outer peripheral surface of the spiral ring portion (63) is meshed and matched with the turbine (62) in the worm gear transmission assembly; An external thread section (1212) is formed on the rotating shaft (1211) at a position near the input end of the rotating shaft (1211) and the bearing seat; the external thread section (1212) matches the internal thread surface of the spiral ring portion (63), so that the rotation of the spiral ring portion (63) can drive the external thread section (1212) to generate axial movement.

11. A modified emulsified asphalt production mill according to claim 10, characterized in that: The order of tooth surface one (1221) and the order of tooth surface two (1321) are both three or more.

12. A modified emulsified asphalt production mill according to claim 11, characterized in that: The order of tooth surface one (1221) and the order of tooth surface two (1321) are both three orders; from the top of grinding tooth one (122) to its root, the angle between the extension direction of the three-order tooth surface on tooth surface one (1221) and the axial direction is successively taken in the range of ≥60 degrees and <90 degrees, ≥45 degrees and <60 degrees, and ≥30 degrees and <45 degrees; from the top of grinding tooth two (132) to its root, the angle between the extension direction of the three-order tooth surface on tooth surface two (1321) and the axial direction is successively taken in the range of ≥30 degrees and <45 degrees, ≥45 degrees and <60 degrees, and ≥60 degrees and <90 degrees.

13. The modified emulsified asphalt production mill according to claim 10, characterized in that: In the multi-layer grinding teeth 1 (122) distributed on the rotor grinding disc (12), each layer contains the same number of grinding teeth 1 (122); in the multi-layer grinding teeth 2 (132) distributed on the stator grinding disc (13), each layer contains the same number of grinding teeth 2 (132).

14. The modified emulsified asphalt production mill according to claim 10, characterized in that: In the multi-layer grinding teeth (122) distributed on the rotor grinding disc (12), the number of grinding teeth (122) contained in each layer is different or partially the same; and / or in the multi-layer grinding teeth (132) distributed on the stator grinding disc (13), the number of grinding teeth (132) contained in each layer is different or partially the same.

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