Modified emulsified asphalt production mill

Abstract

The invention belongs to the technical field of grinding processing equipment, and particularly relates to a modified emulsified asphalt production mill which is characterized in that a plurality of layers of grinding teeth I are distributed on a rotor millstone, and a plurality of layers of grinding teeth II are distributed on a stator millstone. A first tooth surface on the first grinding tooth is a multi-step tooth surface, each step tooth surface of the first tooth surface obliquely extends from one side of the top of the first grinding tooth to one side of the root of the first grinding tooth, and the included angle between the extending direction of each step tooth surface and the axial direction is gradually reduced. A second tooth surface on the second grinding tooth is also a multi-step tooth surface, each step of tooth surface of the second tooth surface obliquely extends from one side of the top of the second grinding tooth to one side of the root of the second grinding tooth, and the included angle between the extending direction of each step of tooth surface and the axial direction is gradually increased. By changing the tooth surface structure of the grinding teeth, the walking path and the flowing direction of materials among the grinding teeth can be changed, the path length and the shearing frequency are increased, and the comprehensive quality of products such as grinding fineness and emulsifying effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt grinding 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 polymer, and finely ground rubber powder, or by slightly oxidizing the asphalt to improve the performance of the asphalt. Modified emulsified asphalt refers to an emulsified asphalt product obtained by adding polymer latex during the production of emulsified asphalt, or by mixing polymer latex with the emulsified asphalt product, or by emulsifying the polymer modified asphalt.

[0003] The working principle of the asphalt production mill is to drive the rotor to rotate at high speed relative to the stator through a high-speed rotating motor, 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 force, high-frequency mechanical vibration, cyclone inertial 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 the existing asphalt production mill, the grinding teeth side of the grinding disc installed on its stator and the grinding teeth of the grinding disc installed on its rotor are all inclined surfaces, and the tooth shapes of the two are the same, both of which are grinding teeth with inclined planes. See the technical solutions disclosed in the patent documents with the publication (announcement) number CN109174298A, entitled a double-sided tooth double-grinding chamber colloid mill; and the publication (announcement) number CN211385222U, entitled a rubber powder asphalt mill. In addition, the grinding teeth arrangement mode of the existing asphalt production mill is basically that the grinding teeth are aligned in the radial direction, and the distribution form of one circle of grinding teeth and one circle of channels has the problem that the asphalt is easy to flow out directly from the channel without flowing through the grinding teeth, which will adversely affect the grinding effect of the asphalt and cause the particles of the emulsified asphalt product to be relatively large.

[0005] In order to reduce the particle size of the asphalt obtained by grinding, the main means adopted are to increase the number and arrangement of the grinding teeth and increase the friction density. In addition, the existing asphalt production mill has a gap size between the meshing relative surfaces of the grinding teeth on the stator and the grinding teeth on the rotor, which is basically in a constant size state after the axial position of the rotor is fixed. Therefore, the gap between the grinding teeth changes very slightly during the grinding operation and is related to the mechanical gap after assembly. The viscosity range of the asphalt suitable for production is relatively narrow, and it is easy to cause problems such as blockage, high scrap rate, and relatively significant increase in energy consumption when producing asphalt with relatively high viscosity. In order to better adapt to the production of asphalt raw materials with larger particles, colloidal raw materials, or the production of asphalt with different viscosities, it is necessary to stop the machine to adjust the axial gap size between the relative surfaces of the stator and the rotor. During this period, it is necessary to wait for the temperature of the grinding body to drop to a suitable range before manually opening the locking nut and manually turning the nut at the front and rear positions of the bearing to adjust the gap size between the stator and the rotor. The whole process is time-consuming and seriously affects 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, which can increase the path length of the material and the number of times the material is sheared, help to prolong 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 arranged in the grinding chamber unit, a rotor grinding disc is fixedly arranged on the rotor, and a stator grinding disc is fixedly arranged on the stator. Multiple circles / multiple layers of grinding teeth 1 are distributed on the periphery of 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 on the periphery of 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 between the grinding teeth.

[0008] The tooth surfaces one on both sides of the grinding tooth one are both stepped multi-step tooth surfaces, and each step tooth surface of the tooth surface one is extended obliquely from the top side of the grinding tooth one 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 in a trend; correspondingly, the tooth surfaces two on both sides of the grinding tooth two are also stepped multi-step tooth surfaces, and each step tooth surface of the tooth surface two is extended obliquely from the top side of the grinding tooth two 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 in a trend.

[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, or 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-order or four-order zigzag stepped inclined surfaces with continuously connected tooth surfaces of each step.

[0012] Optionally, from the top to the root of grinding tooth one, the angle between the extension direction of the third-order tooth surface on tooth surface one and the axial direction is 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 second grinding tooth, the angle between the extension direction of the third-order tooth surface on the second tooth surface and the axial direction is 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-layer grinding teeth 1 distributed on the rotor grinding disc, each layer contains the same number of grinding teeth 1. In the multi-layer grinding teeth 2 distributed on the stator grinding disc, each layer contains the same number of grinding teeth 2.

[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, between the multiple layers of grinding teeth 1 distributed on the rotor grinding disc, the grinding teeth 1 in two adjacent layers are arranged alternately, 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 arranged alternately, 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 pipeline, and the heat transfer oil heating lumen is surrounded by the outer layer, the asphalt delivery lumen is the middle layer, and the soap liquid delivery lumen is the inner layer.

[0024] The asphalt soap liquid mixing end includes an asphalt feeding one-way valve part, a soap liquid feeding one-way valve part and a mixing chamber part. The inner end of the valve channel of the asphalt feeding one-way valve part and the inner end of the valve channel of the soap liquid feeding one-way valve part are vertically intersected and simultaneously pass through to the feeding port of the mixing chamber part. The output port of the mixing chamber part is fixedly connected to the outer shell of the grinding chamber unit, and is passed through the grinding chamber and the axial hole provided on the stator grinding disc. The asphalt delivery pipe cavity is connected to the inlet end of the asphalt feeding one-way valve part, and the soap liquid delivery pipe cavity is connected to the inlet end of the soap liquid feeding one-way valve part.

[0025] Optionally, it also includes a pressure regulating valve which is arranged on the outer shell and communicated with the grinding chamber.

[0026] Optionally, a servo gap adjustment unit is also included which matches the rotating shaft driving the rotor grinding disc to rotate.

[0027] The servo clearance adjustment unit comprises 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 matches the worm in the worm gear transmission assembly.

[0028] An external thread section is formed on the rotating shaft at the input end side of the rotating shaft and close to the bearing seat. The external thread section matches the spiral ring part, so that the rotation of the spiral ring part can drive the external thread section to move axially or drive the rotating shaft to move axially.

[0029] The beneficial effects of the present invention are as follows: 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, which can increase the path length of the material and increase the number of times the material is sheared, which helps 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 mixing ability of the mill, improving the homogenization effect, and increasing the grinding fineness of the resulting product.

[0030] By changing the relative distribution position 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 two adjacent grinding teeth in the circumferential direction, and the flow channel and path of the emulsified asphalt material are changed, which can cause the material to automatically generate 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 grinding teeth in different layers and circles, and / or setting different circumferential gap sizes between 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 appearance 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 This is a schematic diagram of the structure of the stator grinding disc.

[0035] Figure 4 It is a 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 local 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 section, 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 people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[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 arranged in the outer shell 11 of the grinding chamber unit 10, and a rotor grinding disc 12 is fixed on the rotor, and a stator grinding disc 13 is fixed on the stator. Multiple circles / multi-layer grinding teeth 122 are distributed radially and alternately around the axial hole 121 on the rotor grinding disc 12, and each circle / each layer contains multiple grinding teeth 122. Multiple circles / multi-layer grinding teeth 2 132 are distributed radially and alternately around the axial hole 2 131 on the stator grinding disc 13, and each circle / each layer contains multiple grinding teeth 2 132. After the rotor grinding disc 12 and the stator grinding disc 13 are relatively matched and installed in the grinding chamber on the outer shell 11, the grinding teeth 122 can mesh and match with the grinding teeth 2 132, and the materials such as asphalt flowing between the two grinding teeth can be mixed, ground, and other processing processes can be achieved.

[0042] The heat transfer oil heating lumen, the asphalt delivery lumen and the soap liquid delivery lumen are compositely formed into a coaxial pipe, and the heat transfer oil heating lumen is surrounded by the outer layer, the asphalt delivery lumen is the middle layer, and the soap liquid delivery lumen is the inner layer. It is associated with the asphalt soap liquid mixing end / asphalt soap liquid mixer formed by the asphalt delivery one-way valve part 20, the soap liquid delivery one-way valve part 30 and the mixing chamber part 40. Specifically, the asphalt delivery lumen is connected to the inlet end of the asphalt delivery one-way valve part 20, and the soap liquid delivery lumen is connected to the inlet end of the soap liquid delivery one-way valve part 30.

[0043] The inner end of the valve channel of the asphalt feeding check valve part 20 and the inner end of the valve channel of the soap liquid feeding check valve part 30 are vertically intersected (including the absolutely vertical and relatively vertical states, generally making the axis centerline angle of the two valve channels in the range of 80 degrees to 90 degrees) and simultaneously pass through the feeding port of the mixing chamber part 40. The output port of the mixing chamber part 40 is connected and passed through the second shaft hole 131 formed on the stator grinding disc 13.

[0044] The above improvements to the mixing method of asphalt and soap liquid can directly improve the emulsification ability of the mill, and can produce emulsified asphalt with a softening point greater than 90 degrees Celsius, effectively overcoming the difficulty of the softening point of emulsified asphalt in the prior art being generally around 75 degrees Celsius. Compared with the prior art, in which asphalt and soap liquid are transported in separate pipelines, the above improvements to the mixed transportation method of asphalt and soap liquid can reduce the mixing distance, improve the uniformity and stability of the mixing pressure, and can cause the soap liquid to form a high-temperature, atomized state or a gas-liquid mixed state during the transportation process, and when the asphalt soap liquid mixing end contacts the asphalt, the surface area of ​​the soap liquid and asphalt mixture is increased, which can make the asphalt instantly close to the foam state and better emulsified. Therefore, the improvement of the transportation and mixing method of asphalt and soap liquid can shorten the mixing distance, make the mixing pressure uniform, make the production process stable and reliable, and increase the mixing area of ​​asphalt and soap liquid, have an atomization premixing effect, and improve the emulsification quality.

[0045] The pressure regulating valve 50 is fixedly mounted on the housing 11. The pressure regulating valve 50 is connected to the grinding chamber of the grinding chamber unit 10 and can adjust the pressure state in the grinding chamber.

[0046] The servo gap adjustment unit 60 is fixedly provided on the frame and matches the rotating shaft 1211 driving 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 matches the worm 61 in the worm gear transmission assembly, and the outer peripheral surface of the spiral ring portion 63 meshes and matches with the worm 62 in the worm gear transmission assembly.

[0047] An external thread section 1212 is formed on the rotating shaft 1211 at the input end side 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 the servo adjustment of the axial position of the rotor grinding disc 12, that is, it helps to realize the change of parameters such as temperature change, pressure change, current change, etc. of the mill, and realizes the purpose of servo adjustment of the relative surface spacing / gap size between the rotor grinding disc 12 and the stator grinding disc 13 by the control unit, which can better control the production process and ensure 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 prior art 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, converting it into the rotational force of the thread, and also uses the self-locking function of the worm gear. The servo motor accurately adjusts the gap, and the advantage is 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, so that the internal thread surface of the spiral ring part 63 rotates and moves, and the internal thread surface can drive the bearing seat / bearing chamber to move, thereby achieving the gap adjustment in the working state. The spiral ring part 63 can be understood as an implementation situation including a spiral ring body; it can also be understood as an implementation situation including 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 to feed the heat transfer oil for heating into the outer cavity of the housing 11 to adjust and control the temperature in the grinding cavity. At the same time, the housing 11 is also provided with a temperature sensor 15 to detect the temperature of the emulsified asphalt mixture formed by the asphalt and soap solution in the grinding cavity and to feed back to the control unit.

[0051] A second temperature sensor 21 is provided on the asphalt feeding one-way valve portion 20, and a third temperature sensor 31 is provided on the soap liquid feeding one-way valve portion 30. The second temperature sensor 21 and the third temperature sensor 31 are used to detect the feeding temperature of the asphalt and the feeding temperature of the soap liquid, respectively, and are both connected to the control unit to feed back corresponding temperature data to the control unit.

[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 first-step tooth surface z4, the second-step tooth surface z5 and the third-step tooth surface z6 shown in the figure. Each step tooth surface on the tooth surface 1221 is extended obliquely from the top side of the grinding tooth 122 to the root side of the grinding tooth 122, and the angles formed between the extension direction of each step tooth surface from the top to the root and the axial direction (of the rotor grinding disc 12) are in a decreasing trend, that is, 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, and the angle b3 is greater than the angle b2, and the angle b2 is greater than the angle b1.

[0053] Correspondingly, the tooth surfaces 1321 on both sides 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 first-step tooth surface d1, the second-step tooth surface d2 and the third-step tooth surface d3 shown in the figure. Each step tooth surface on the second tooth surface 1321 is extended obliquely from the top side of the second grinding tooth 132 to the root side of the second grinding tooth 132, and the angles formed between the extension direction of each step tooth surface from the top to the root and the axial direction (of the stator grinding disc 13) are in a trend of increasing successively, 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, and 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 1321 on the second grinding tooth 132 are both formed as three-step zigzag step-shaped inclined surfaces that are continuously connected. 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 1321 of the second grinding tooth 132. Figures 4 to 5 As shown, along the direction of the arrow in the figure, the mixed material 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, and the mixed material first climbs from the root of the second grinding tooth 132 toward the top / end of the second grinding tooth 132 in the radial flow direction shown by the arrow, 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), and this cycle is repeated, and finally the mixed material continuously flows from the axial center position of the grinding disc to the outer peripheral surface side of the grinding disc, thereby realizing the mixing, grinding and other processes.

[0055] Therefore, in the radial flow direction of the mixed material, the size of the multiple gap intervals between the relative tooth surfaces can be gradually reduced / narrowed during the relative tooth surface gap between the tooth surface 1 1221 and the tooth surface 2 1321, and during the creeping from the root of the grinding tooth 2 132 to the top of the grinding tooth 1 132; on the contrary, the size of the multiple gap intervals between the relative tooth surfaces can be gradually increased / widened during the relative tooth surface gap between the tooth surface 1 1221 and the tooth surface 2 1321, and during the creeping from the root of the grinding tooth 1 122 to the top of the grinding tooth 1 122, and the aforementioned change process is circulated in sequence. Finally, not only the length of the radial path of the mixed material is extended, and the mixing and grinding time of the mixed material in the grinding chamber is extended, but also the mixed material can be cyclically sheared multiple times on the radial flow path, and cyclically dispersed-synthesized multiple times, which helps to promote the mixing and homogenization effect between the mixed materials. 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 order of the first tooth surface 1221 can also be two orders, and correspondingly, the order of the second tooth surface 1321 is also two orders. Preferably, the order of the first tooth surface 1221 and the order of the second tooth surface 1321 are both three orders or more.

[0057] From the top to the root of the grinding tooth 122, the angle between the extension direction of the third-order tooth surface on the tooth surface 1221 and the axial direction is in the range of 60 degrees to 90 degrees (not included), 45 degrees to 60 degrees (not included), and 30 degrees to 45 degrees (not included). That is, the angle b3 is 60 degrees or 63 degrees, the angle b2 is 45 degrees or 50 degrees, and the angle b1 is 30 degrees or 40 degrees.

[0058] From the top to the root of the grinding tooth 132, the angle between the extension direction of the third-order tooth surface on the tooth surface 1321 and the axial direction is in the range of 30 degrees to 45 degrees (not included), 45 degrees to 60 degrees (not included), and 60 degrees to 90 degrees (not included), respectively. That is, the angle a1 is 30 degrees or 32 degrees, the angle a2 is 45 degrees or 48 degrees, and the angle a3 is 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. At the same time, the angle a1 can be set to 30 degrees, the angle a2 to 45 degrees, and the angle a3 to 60 degrees. Even if the three angles between the extension direction of the third-order tooth surface on the tooth surface 1221 and the axial direction are consistent with the three angles between the extension direction of the third-order tooth surface on the tooth surface 2 1321 and the axial direction, the change directions are opposite.

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

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

[0062] As described above, by changing the relative distribution position of the grinding teeth 1 122 and / or the grinding teeth 2 132 in each layer and each inner and outer circle, even if the grinding teeth 1 122 in two adjacent layers / two circles are in a relative distribution state of cross / staggered arrangement, and at the same time, the grinding teeth 2 132 in two adjacent layers / two circles are in a relative distribution state of cross / staggered arrangement, the circumferential gap between two adjacent grinding teeth in the circumferential direction of the two grinding discs (i.e., between the grinding teeth 1 122 and between the grinding teeth 2 132) is blocked, and the flow channel structure and path of the emulsified asphalt material can be changed. After being associated with the multi-step stepped inclined surface structure formed by the tooth surface of the grinding teeth, it can further promote the mixed material to automatically generate a large pressure in the grinding chamber to inhibit the vaporization of soap liquid or water, prevent blockage, and improve the shearing, mixing homogenization, emulsification effect, etc., which can further ensure the stability and smoothness of production and improve the overall quality of the obtained 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 is 8 respectively, and the number of grinding teeth 132 contained in the other two layers is 10 and 9 respectively.

[0065] In other embodiments, it is also possible to make the grinding teeth 122 in two adjacent layers of the multi-layer grinding teeth 122 distributed on the rotor grinding disc 12 be staggered with each other, so that the circumferential spacing between two adjacent grinding teeth 122 in each layer can be mutually shielded; correspondingly, as in the prior art, the grinding teeth 132 on the multi-layer grinding teeth 132 distributed on the stator grinding disc 13 are neatly arranged in rows along the radial direction and form multiple rows distributed around the circumferential direction. Alternatively, it is possible to make the grinding teeth 132 in two adjacent layers of the multi-layer grinding teeth 132 distributed on the stator grinding disc 13 be staggered with each other, so that the circumferential spacing between two adjacent grinding teeth 132 in each layer can be mutually shielded; correspondingly, as in the prior art, the grinding teeth 122 on the multi-layer grinding teeth 122 distributed on the rotor grinding disc 12 are neatly arranged in rows along the radial direction and form multiple rows distributed around the circumferential direction.

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

[0067] The above-mentioned embodiment of making the grinding teeth (grinding teeth 122 and / or grinding teeth 2 132) of each layer be staggered should be understood as including 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 situation shown in the figure), as well as the situation in which the grinding teeth in a certain layer partially block the circumferential spacing between the two adjacent grinding teeth in the adjacent layer, and the situation in which the above two states are mixed. Making the blocking state between the grinding teeth not uniform but having certain differences can help to better suppress blockage, promote the fluidity / flowability of mixed materials such as asphalt between the grinding teeth, and the mixing homogenization effect, and can adapt to the production of asphalt with larger particles and higher viscosity, so as to achieve the purpose of improving the homogenization and emulsification effect and increasing the grinding fineness. Therefore, it is preferred that the blocking state between the grinding teeth is a mixture of complete blocking and partial blocking.

[0068] The shapes of the tooth surfaces 1221 of the grinding teeth 122 distributed in each layer on the rotor grinding disc 12 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 surface 1221 of one or two layers of grinding teeth 122 close to the shaft hole 121 can be formed into an implementation form in which the angle b3 is 60 degrees, the angle b2 is 45 degrees, and the angle b1 is 30 degrees, while the tooth surface 1221 in other layers is formed into an implementation form in which the angle b3 is 63 degrees, the angle b2 is 47 degrees, and the angle b1 is 31 degrees, etc. Or the tooth surface 1221 can have more 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 surface 1321 of one or two layers of grinding teeth 132 close to the second shaft hole 131 can be formed into an implementation form in which the angle a1 is 31 degrees, the angle a2 is 48 degrees, and the angle a3 is 63 degrees, while the tooth surface 1321 in other layers is formed into an implementation form in which the angle a1 is 30 degrees, the angle a2 is 45 degrees, and the angle a3 is 60 degrees, etc. Or the tooth surface 1321 can have more forms.

[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, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still 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 the tooth surfaces of each step of the tooth surface 1 (1221) are all inclined 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 the tooth surfaces of each step from the top to the root and the axial direction decrease successively; correspondingly, the tooth surfaces 2 (1321) on both sides of the grinding tooth 2 (132) are both multi-step tooth surfaces, and the tooth surfaces of each step of the tooth surface 2 (1321) are all inclined 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 the tooth surfaces of each step from the top to the root and the axial direction increase successively.

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 selected 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 selected 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: The plurality of grinding teeth (122) distributed on the rotor grinding disc (12) are arranged so that the grinding teeth (122) in two adjacent layers are staggered with each other, thereby forming a shield between the circumferential spacing between the two adjacent grinding teeth (122) in each layer; and / or the plurality of grinding teeth (132) distributed on the stator grinding disc (13) are arranged so that the grinding teeth (132) in two adjacent layers are staggered with each other, thereby forming a shield between the circumferential spacing between the two adjacent grinding teeth (132) in each layer.

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. A modified emulsified asphalt production mill according to any one of claims 1 to 5, 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 channel of the asphalt feeding one-way valve portion (20) and the inner end of the valve channel 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) provided on the housing (11) and in communication with the grinding chamber.

10. A modified emulsified asphalt production mill according to any one of claims 1 to 5, characterized in that: It also includes a servo gap adjustment unit (60) that matches 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 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.

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