A device for preparing rubber powder by high-pressure water jet composite method

Abstract

An apparatus for preparing rubber powder using a high-pressure water jet composite method includes a high-pressure water generating system, a multi-nozzle cutting head, a rotary crushing cylinder assembly, a rotary filter cylinder assembly, a liquid collecting cylinder, a fixed base, and a base. The fixed base is fixed on the base and includes an upper mounting plate, a lower mounting plate, and a column connecting the upper and lower mounting plates. The multi-nozzle cutting head and the rotary crushing cylinder assembly are mounted on the upper mounting plate, the rotary filter cylinder assembly is mounted on the lower mounting plate, and the liquid collecting cylinder is mounted on the column. The high-pressure water generating system is connected to the multi-nozzle cutting head, and the rotary crushing cylinder assembly includes a crushing cylinder and a crushing rotation device. This invention employs a high-efficiency composite of high-pressure water jet and mechanical crushing to achieve a dual crushing mechanism of non-contact cutting and mechanical shearing, meeting the production requirements of fine rubber powder. The multi-nozzle cutting head uses layered multi-nozzle coverage cutting, significantly reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of rubber powder preparation technology, and in particular to an apparatus for preparing rubber powder using a high-pressure water jet composite method. Background Technology

[0002] The main method of rubber recycling is to produce recycled rubber from waste tires. However, the production process of recycled rubber is backward, energy-intensive and polluting to the environment. Moreover, the resulting rubber powder has a large particle size. Because of the incompressibility, high coefficient of friction and elasticity of rubber, it is not easy to break and separate. At present, the commonly used tire rubber crushing and rubber powder production methods at home and abroad are divided into three types: room temperature method, low temperature method and wet method.

[0003] 1. The room temperature method, which uses traditional mechanical equipment for crushing, produces rubber powder with large particle size, which cannot obtain high-quality fine rubber powder, has low reuse value, and is not suitable for tire remanufacturing requirements.

[0004] 2. Low-temperature pulverization method, which often uses liquid nitrogen as a refrigerant, can reach a cooling temperature of -196°C. It can produce high-quality fine adhesive powder with small particle size and high reuse value. However, due to excessive energy consumption and high production cost, it has poor economic efficiency and cannot be widely promoted and applied in engineering.

[0005] 3. Wet solution pulverization method: The wet method involves placing rubber blocks in a solution and pulverizing them using a grinding disc rubber mill or other related mechanical equipment to produce high-quality fine rubber powder with small particle size. This method has high reuse value, but it requires high investment, has low efficiency, and cannot be applied in engineering.

[0006] Therefore, there is a need for a device that can produce fine adhesive powder at room temperature with low energy consumption, low cost, and environmental friendliness. Summary of the Invention

[0007] The present invention aims to address the shortcomings of the prior art by providing an apparatus for preparing rubber powder using a high-pressure water jet composite method.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An apparatus for preparing rubber powder using a high-pressure water jet composite method includes a high-pressure water generating system, a multi-nozzle cutting head, a rotary crushing cylinder assembly, a rotary filter cylinder assembly, a liquid collecting cylinder, a fixed base, and a base. The fixed base is fixed on the base and includes an upper mounting plate, a lower mounting plate, and a column connecting the upper and lower mounting plates. The multi-nozzle cutting head and the rotary crushing cylinder assembly are mounted on the upper mounting plate, the rotary filter cylinder assembly is mounted on the lower mounting plate, and the liquid collecting cylinder is mounted on the column. The high-pressure water generating system is connected to the multi-nozzle cutting head. The rotary crushing cylinder assembly includes a crushing cylinder and a crushing and rotating device. The multi-nozzle cutting head is fitted inside the crushing cylinder at its central shaft, and cutting blades are provided on the inner wall of the crushing cylinder. The outer wall of the crushing cylinder is equipped with spiral blades. The crushing rotation device includes an upper hollow shaft bearing seat, a first servo motor, and a hollow flange. The upper hollow shaft bearing seat and the first servo motor are mounted on the upper mounting plate. A small sprocket is connected to the output shaft of the first servo motor. A large sprocket is installed on the upper end of the hollow shaft inside the upper hollow shaft bearing seat. The large sprocket and the small sprocket are driven by a chain. The lower end of the hollow shaft inside the upper hollow shaft bearing seat is connected to the hollow flange. The hollow flange is connected to the top of the crushing cylinder. The rotating filter cylinder assembly includes a filter cylinder and a filtering rotation device. The filtering rotation device is connected to the bottom of the filter cylinder. The filter cylinder is sleeved on the outside of the crushing cylinder from bottom to top. The liquid collection cylinder is sleeved on the outside of the filter cylinder. A discharge pipe is provided at the bottom of the liquid collection cylinder.

[0010] The multi-nozzle cutting head is a fixed-layer multi-nozzle cutting head.

[0011] The upper mounting plate is convex in shape. The protruding part of the upper mounting plate has a first mounting hole, and the first servo motor is installed in the first mounting hole. The corresponding part of the upper mounting plate and the lower mounting plate has a second mounting hole, and the upper hollow shaft bearing seat is installed in the second mounting hole. The lower mounting plate has a third mounting hole, and the filter rotation device is installed in the third mounting hole. A horizontal horizontal hanging plate is fixed to the inner side wall of the top of the column. The column is provided with the four corners of the lower mounting plate. A grooved connecting plate is fixed to the inner side wall of the middle part of the column.

[0012] The filter cylinder is a cylindrical structure with an open top and a closed bottom, equipped with a filter cylinder bottom plate and a filter screen on its periphery. The filter cylinder bottom plate has radially distributed arc-shaped blades on its upper surface facing the inside of the cylinder, and a flange on its lower surface facing away from the inside of the cylinder. A scraper is suspended on the inner side of the filter screen of the filter cylinder by a horizontal hanging plate.

[0013] The filter rotation device includes a lower hollow shaft bearing seat and a second servo motor. A flange is connected to the upper end of the hollow shaft of the lower hollow shaft bearing seat. The flange is bolted to the flange at the lower end of the filter cylinder. The second servo motor is connected to the lower end of the hollow shaft of the lower hollow shaft bearing seat.

[0014] The liquid collecting cylinder includes a cylinder body, an annular bottom connected to the bottom of the cylinder body, a circular anti-overflow plate connected upward at the inner diameter of the annular bottom, and discharge ports symmetrically opened on both sides of the annular bottom, with a solid phase separation device connected to the discharge ports.

[0015] The base includes support legs and a square connecting plate. The support legs are connected to the four corners of the square connecting plate, and a stabilizing reinforcing plate is connected to the bottom of the support legs. A fourth mounting hole for installing a second servo motor is provided in the middle of the square connecting plate.

[0016] The beneficial effects of this invention are as follows: This invention adopts a high-efficiency combination of high-pressure water jet and mechanical crushing to achieve a dual crushing mechanism of non-contact cutting and mechanical shearing, which meets the production needs of fine adhesive powder. The multi-nozzle cutting head performs layered multi-nozzle coverage cutting, which significantly reduces energy consumption. An annular cavity is formed between the crushing cylinder and the filter cylinder. The spiral blades push the material to rise spirally along the outer wall of the crushing cylinder, and the reverse rotation inside the filter cylinder forms a vortex to enhance the crushing environment, realizing the integration of dynamic circulation and graded filtration of adhesive powder. The high-pressure water jet and mechanical cutting work together to create a green and environmentally friendly crushing environment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the fixing base structure of the present invention;

[0019] Figure 3 This is a top view of the fixed base of the present invention;

[0020] Figure 4 This is a schematic diagram of the filter cartridge structure of the present invention;

[0021] Figure 5 This is a top view of the filter cylinder of the present invention;

[0022] Figure 6 This is a schematic diagram of the liquid collecting cylinder structure of the present invention;

[0023] Figure 7 This is a top view of the liquid collecting cylinder of the present invention;

[0024] Figure 8 This is a schematic diagram of the base structure of the present invention;

[0025] Figure 9 This is a top view of the base of the present invention;

[0026] In the diagram: 1-High-pressure water generation system; 2-Multi-nozzle cutting head; 3-Rotary crushing cylinder assembly; 31-Crushing cylinder; 311-Cut blade; 312-Helical blade; 32-Crushing rotation device; 321-Large sprocket; 322-Upper hollow shaft bearing seat; 323-Small sprocket; 324-First servo motor; 325-Hollow flange; 4-Rotary filter cylinder assembly; 41-Filter cylinder; 411-Filter screen; 412-Filter cylinder base plate; 413-Arc-shaped blade; 414-Flange; 42-Filter rotation device; 421-Lower hollow shaft 422-Flange; 423-Second servo motor; 43-Scraper; 5-Collection cylinder; 51-Cylinder body; 52-Annular bottom; 53-Circular overflow preventer; 54-Discharge port; 6-Fixed seat; 61-Upper mounting plate; 611-First mounting hole; 612-Second mounting hole; 62-Lower mounting plate; 621-Third mounting hole; 63-Column; 631-Trough-shaped connecting plate; 632-Horizontal hanging plate; 7-Base; 71-Leg; 72-Square connecting plate; 73-Stabilizing reinforcing plate; 74-Fourth mounting hole; 8-Discharge pipe;

[0027] The following will describe in detail, with reference to the accompanying drawings, embodiments of the invention. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] An apparatus for preparing rubber powder using a high-pressure water jet composite method includes a high-pressure water generating system 1, a multi-nozzle cutting head 2, a rotary crushing cylinder assembly 3, a rotary filter cylinder assembly 4, a liquid collecting cylinder 5, a fixing seat 6, and a base 7. The fixing seat 6 is fixed on the base 7 and includes an upper mounting plate 61, a lower mounting plate 62, and a column 63 connecting the upper mounting plate 61 and the lower mounting plate 62. The multi-nozzle cutting head 2 and the rotary crushing cylinder assembly 3 are mounted on the upper mounting plate 61, the rotary filter cylinder assembly 4 is mounted on the upper mounting plate 62, and the liquid collecting cylinder 5 is mounted on the column 63. The high-pressure water generating system 1 is connected to the multi-nozzle cutting head 2. The rotary crushing cylinder assembly 3 includes a crushing cylinder 31 and a crushing and rotating device 32. The multi-nozzle cutting head 2 is sleeved at the central shaft inside the crushing cylinder 31. Cutting blades 311 are provided on the inner wall of the crushing cylinder 31, and spiral blades 311 are provided on the outer wall of the crushing cylinder 31. 12. The pulverizing and rotating device 32 includes an upper hollow shaft bearing seat 322, a first servo motor 324, and a hollow flange 325. The upper hollow shaft bearing seat 322 and the first servo motor 324 are mounted on the upper mounting plate 61. A small sprocket 323 is connected to the output shaft of the first servo motor 324. A large sprocket 321 is mounted on the upper end of the hollow shaft inside the upper hollow shaft bearing seat 322. The large sprocket 321 and the small sprocket 323 are driven by a chain. The lower end of the hollow shaft inside the upper hollow shaft bearing seat 322 is connected to the hollow flange 325. The hollow flange 325 is connected to the top of the pulverizing cylinder 31. The rotating filter cylinder assembly 4 includes a filter cylinder 41 and a filtration and rotating device 42. The filtration and rotating device 42 is connected to the bottom of the filter cylinder 41. The filter cylinder 41 is sleeved on the outside of the pulverizing cylinder 31 from bottom to top. The liquid collecting cylinder 5 is sleeved on the outside of the filter cylinder 41. A discharge pipe 8 is provided at the bottom of the liquid collecting cylinder 5.

[0030] The multi-nozzle cutting head 2 is a fixed layered multi-nozzle cutting head.

[0031] The upper mounting plate 61 is convex in shape. The protruding part of the upper mounting plate 61 has a first mounting hole 611. The first servo motor 324 is installed in the first mounting hole 611. The part of the upper mounting plate 61 corresponding to the lower mounting plate 62 has a second mounting hole 612. The upper hollow shaft bearing seat 322 is installed in the second mounting hole 612. The lower mounting plate 62 has a third mounting hole 621. The filter rotating device 42 is installed in the third mounting hole 621. A horizontal horizontal hanging plate 632 is fixed to the inner side wall of the top of the column 63. The column 63 is provided with the four corners of the lower mounting plate 62. A grooved connecting plate 631 is fixed to the inner side wall of the middle part of the column 63.

[0032] The filter cylinder 41 is a cylindrical structure with an open top and a closed bottom, equipped with a filter cylinder bottom plate 412 and a filter screen 411 on its peripheral wall. The filter cylinder bottom plate 412 has radially distributed arc-shaped blades 413 on its upper surface facing the inside of the cylinder, and a flange 414 on its lower surface facing away from the inside of the cylinder. A scraper 43 is suspended on the inner side of the filter screen 411 of the filter cylinder 41 by a horizontal hanging plate 632.

[0033] The filter rotation device 42 includes a lower hollow shaft bearing seat 421 and a second servo motor 423. The upper end of the hollow shaft of the lower hollow shaft bearing seat 421 is connected to a flange 422, which is bolted to the flange 414 at the lower end of the filter cylinder 41. The second servo motor 423 is connected to the lower end of the hollow shaft of the lower hollow shaft bearing seat 421.

[0034] The liquid collecting cylinder 5 includes a cylinder body 51, an annular bottom 52 connected to the bottom of the cylinder body 51, a circular anti-overflow plate 53 connected upward at the inner diameter of the annular bottom 52, and discharge ports 54 symmetrically opened on both sides of the annular bottom 52, with a solid phase separation device connected to the discharge ports 54.

[0035] The base 7 includes support legs 71 and a square connecting plate 72. The support legs 71 are connected to the four corners of the square connecting plate 72. The bottom of the support legs 71 is connected to a stabilizing reinforcing plate 73. The square connecting plate 72 has a fourth mounting hole 74 in the middle for mounting a second servo motor 423.

[0036] Example 1: Taking the preparation of fine rubber powder with a particle size ≤0.2mm from waste tire rubber (styrene-butadiene rubber content ≥70%) as an example.

[0037] The high-pressure water generating system 1 operates at a pressure of 350 MPa and a flow rate of 20-24 L / min. It is connected to a multi-nozzle cutting head 2 via a high-pressure pipe. The multi-nozzle cutting head 2 is housed within a rotary crushing cylinder assembly 3, which in turn is housed within a rotary filter cylinder assembly 4. A large sprocket 321 serves as the feed inlet for the rubber blocks. The rubber blocks are fed into the crushing cylinder 31 through this inlet. Upon activation of the high-pressure water generating system 1, 350 MPa water flows through the multi-nozzle cutting head 2, forming a high-speed jet that pre-cuts the rubber blocks into 5-10 mm fragments. These fragments are then subjected to secondary shearing by the cutting blades 311 as the crushing cylinder 31 rotates. Simultaneously, the spiral blades 312 propel the material upwards. The outer wall of the crushing cylinder 31 and the filter cylinder... The annular cavity inside the filter cylinder 41 forms the structure of a screw conveyor. When the crushing cylinder 31 and the filter cylinder 41 rotate in opposite directions, the rubber powder liquid flows upwards. After reaching the top of the crushing cylinder 31, the material falls back to the cutting area through the return hole. The filter cylinder 41 rotates in the opposite direction, and the filter screen 411 intercepts substandard particles, returning them to the crushing cylinder 31. Qualified rubber powder enters the collection cylinder 5. The discharge port 54 at the bottom of the collection cylinder 5 is connected to the inlet of the solid-phase separation device, achieving rapid separation of rubber powder and water. During the rubber particle crushing process, the rubber particle liquid is accelerated to rotate, flow, and circulate. Under the combined action of high-pressure water jet and metal cutting blades 311, the rubber particles are continuously and frequently crushed, greatly improving the crushing efficiency and effect. The use of an impact filtration device not only accelerates the flow rate of the rubber powder liquid but also maximizes the actual filtration area of ​​the filter cylinder 41, significantly improving the filtration effect and efficiency. The pulverizing and rotating device 32 adopts a hollow shaft bearing seat 322 and a hollow flange 325 structure, which allows the high-pressure pipeline to be easily installed in the pulverizing cylinder 31 through the center of the hollow shaft bearing seat 322 and the fixed multi-nozzle cutting head 2. At the same time, it realizes the rotation of the pulverizing cylinder 31 and also functions as a feeding port. The cavitation effect and high-speed impact effect in the high-pressure water jet can achieve the effect of low-temperature crushing of rubber materials at room temperature, thereby achieving the purpose of producing fine rubber powder at room temperature with low energy consumption, low cost and green environmental protection.

[0038] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution, or direct application to other situations without modification, are all within the scope of protection of the invention.

Claims

1. An apparatus for preparing rubber powder using a high-pressure water jet composite method, characterized in that, The system includes a high-pressure water generating system (1), a multi-nozzle cutting head (2), a rotary pulverizing cylinder assembly (3), a rotary filter cylinder assembly (4), a liquid collecting cylinder (5), a mounting base (6), and a base (7). The mounting base (6) is fixed on the base (7). The mounting base (6) includes an upper mounting plate (61), a lower mounting plate (62), and a column (63) connecting the upper mounting plate (61) and the lower mounting plate (62). The multi-nozzle cutting head (2) and the rotary pulverizing cylinder assembly (3) are mounted on the upper mounting plate. On plate 61), the rotary filter assembly (4) is mounted on the lower mounting plate (62), the liquid collection cylinder (5) is mounted on the column (63), the high-pressure water generation system (1) is connected to the multi-nozzle cutting head (2), the rotary pulverizing cylinder assembly (3) includes a pulverizing cylinder (31) and a pulverizing rotation device (32), the multi-nozzle cutting head (2) is sleeved on the central shaft inside the pulverizing cylinder (31), the inner wall of the pulverizing cylinder (31) is provided with cutting blades (311), and the outer wall of the pulverizing cylinder (31) is provided with spiral blades (312). The crushing and rotating device (32) includes an upper hollow shaft bearing housing (322), a first servo motor (324), and a hollow flange (325). The upper hollow shaft bearing housing (322) and the first servo motor (324) are mounted on an upper mounting plate (61). A small sprocket (323) is connected to the output shaft of the first servo motor (324). A large sprocket (321) is mounted on the upper end of the hollow shaft inside the upper hollow shaft bearing housing (322). The large sprocket (321) and the small sprocket (323) are driven by a chain. The lower end of the hollow shaft in the bearing housing (322) is connected to the hollow flange (325), and the hollow flange (325) is connected to the top of the crushing cylinder (31). The rotating filter cylinder assembly (4) includes a filter cylinder (41) and a filter rotating device (42). The filter rotating device (42) is connected to the bottom of the filter cylinder (41). The filter cylinder (41) is sleeved on the outside of the crushing cylinder (31) from bottom to top. The liquid collecting cylinder (5) is sleeved on the outside of the filter cylinder (41). The bottom of the liquid collecting cylinder (5) is provided with a discharge pipe (8).

2. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 1, characterized in that, The multi-nozzle cutting head (2) is a fixed layered multi-nozzle cutting head.

3. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 1, characterized in that, The upper mounting plate (61) is convex in shape. The protruding part of the upper mounting plate (61) has a first mounting hole (611). The first servo motor (324) is installed in the first mounting hole (611). The upper mounting plate (61) and the lower mounting plate (62) have corresponding parts with a second mounting hole (612). The upper hollow shaft bearing seat (322) is installed in the second mounting hole (612). The lower mounting plate (62) has a third mounting hole (621). The filter rotating device (42) is installed in the third mounting hole (621). A horizontal horizontal hanging plate (632) is fixed on the inner side wall of the top of the column (63). The column (63) is provided with the four corners of the lower mounting plate (62). A grooved connecting plate (631) is fixed on the inner side wall of the middle part of the column (63).

4. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 3, characterized in that, The filter cylinder (41) is a cylindrical structure with an open top and a closed bottom, a filter cylinder bottom plate (412) and a filter screen (411) on its periphery. The filter cylinder bottom plate (412) has radially distributed arc-shaped blades (413) on its upper surface facing the inside of the cylinder, and a flange (414) on its lower surface facing away from the inside of the cylinder. A scraper (43) is suspended inside the filter screen (411) of the filter cylinder (41) by a horizontal hanging plate (632).

5. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 4, characterized in that, The filter rotation device (42) includes a lower hollow shaft bearing seat (421) and a second servo motor (423). The upper end of the hollow shaft of the lower hollow shaft bearing seat (421) is connected to a flange (422), and the flange (422) is bolted to the flange (414) at the lower end of the filter cylinder (41). The second servo motor (423) is connected to the lower end of the hollow shaft of the lower hollow shaft bearing seat (421).

6. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 1, characterized in that, The liquid collecting cylinder (5) includes a cylinder body (51), an annular bottom (52) is connected to the bottom of the cylinder body (51), a circular anti-overflow plate (53) is connected upward at the inner diameter of the annular bottom (52), and discharge ports (54) are symmetrically opened on both sides of the annular bottom (52), and a solid phase separation device is connected to the discharge port (54).

7. The apparatus for preparing rubber powder using a high-pressure water jet composite method according to claim 5, characterized in that, The base (7) includes a support leg (71) and a square connecting plate (72). The support leg (71) is connected to the four corners of the square connecting plate (72). The bottom of the support leg (71) is connected to a stabilizing reinforcing plate (73). A fourth mounting hole (74) for installing a second servo motor (423) is provided in the middle of the square connecting plate (72).

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