Rubber powder production system

Abstract

The utility model provides a rubber powder production system, and belongs to the field of rubber production equipment manufacturing. The device comprises a crushing device, a reciprocating screen, a magnetic separation device, a grading vibrating screen and a secondary vibrating screen which are connected in sequence, the crushing device comprises a shell, a driving roller, a driven roller and a gap adjusting device; the driving roller and the driven roller are meshed with each other and are both mounted on the shell; the driven roller is installed on the shell through the gap adjusting device. The system further comprises a controller, an ultrasonic thickness measuring device and a temperature sensor. The ultrasonic thickness measuring device is mounted above the reciprocating screen, and the temperature sensor is mounted above the grading vibrating screen; the ultrasonic thickness measuring device, the temperature sensor and the gap adjusting device are all electrically connected with the controller. By measuring the temperature and the granularity of the rubber powder, the size of a gap in the rubber powder crushing process is controlled, so that the proper temperature and the proper granularity can be kept in the production of the rubber powder, and the quality of the rubber powder is improved.

Description

Technical Field

[0001] The utility model relates to a manufacturing technology of rubber powder production equipment, in particular to a rubber powder production system, belonging to the technical field of recycled rubber recovery and manufacturing. Background Art

[0002] At present, the domestic evaluation of recycled rubber mainly uses tensile strength as an indicator. The pursuit of high strength is still one of the main directions of recycled rubber development. There are generally two main methods to adjust the tensile strength of recycled rubber: (1) Control and change of raw materials such as tire source, softener and activator. The quality of waste tires plays a key role in the tensile strength of recycled rubber. The industry often divides them into tread, tire top, sidewall and full tire parts, and makes certain proportions to meet different index requirements; (2) Adjustment of desulfurization regeneration process, improve the Mooney viscosity of desulfurized rubber powder, and obtain products with suitable Mooney viscosity through multiple refining by refiners. It is necessary to balance tensile strength, energy consumption and production efficiency. In order to prepare recycled rubber from waste tires, it is generally necessary to crush and grind them into rubber powder. However, because waste rubber powder can be directly used in modified asphalt, rubber powder-based thermosetting resin and waterproof roll materials, there are few studies on the reasonable selection of rubber powder technology equipment and matching process parameters for recycled rubber.

[0003] At present, the main reasons for the poor performance of recycled rubber caused by rubber powder include: (1) The high content of impurities including metals leads to a high rate of defective products during application. At the same time, impurities, especially metals, affect the heat transfer process of rubber powder when preparing recycled rubber, which also causes performance decline; (2) Uneven desulfurization of recycled rubber produces a "core-shell" structure, resulting in an uneven surface of recycled rubber products. The main reasons for the poor heat transfer effect are: if the temperature is too high during the crushing process, the surface structure will be destroyed and "carbonization" will be formed; at the same time, the particle size distribution of rubber powder prepared by different processes is too wide, and the thermal conductivity of rubber itself is poor. The particle size of rubber powder directly affects mass transfer and heat transfer.

[0004] Therefore, based on the lack of understanding of the process of crushing into rubber powder in the industry, especially the greater impact of material temperature, crushing times, residence time and impurity removal rate, the development of rubber powder prepared from waste tires for the production of high-quality recycled rubber is of great significance to the high-quality, high-value and resource-based utilization of waste rubber resources. Utility Model Content

[0005] The utility model provides a new rubber powder production system, which can adjust the size of crushed particles in real time by detecting the temperature of crushed rubber powder, so as to solve the technical problem of poor rubber powder production quality in the prior art.

[0006] The rubber powder production system of the embodiment of the utility model comprises: a crushing device, a reciprocating screen, a magnetic separation device, a grading vibrating screen and a secondary vibrating screen connected in sequence;

[0007] The crushing device comprises: a shell, an active roller, a passive roller and a gap adjustment device; the active roller and the passive roller are meshed with each other and are both mounted on the shell; the passive roller is mounted on the shell through the gap adjustment device;

[0008] The system further comprises: a controller, an ultrasonic thickness measuring device and a temperature sensor; the ultrasonic thickness measuring device is installed above the reciprocating screen, and the temperature sensor is installed above the grading vibrating screen;

[0009] The ultrasonic thickness measuring device, the temperature sensor, and the gap adjusting device are all electrically connected to the controller.

[0010] In the rubber powder production system as described above, a diversion guide groove is provided on the magnetic separation device; the upper end of the diversion guide groove is connected to the magnetic separation device, and the lower end thereof is connected to a steel wire packaging and collecting device.

[0011] In the rubber powder production system as described above, a pneumatic blowing device is provided between the grading vibration screen and the secondary vibration screen; and a metal separator is provided between the pneumatic blowing device and the grading vibration screen.

[0012] The rubber powder production system as described above, wherein the system further comprises: a block cutting device and a conveyor belt; the block cutting device is connected to the crushing device via the conveyor belt.

[0013] The rubber powder production system as described above, wherein the system also includes: a reverse conveyor belt; the reverse conveyor belt includes: two input ends and one output end; the output end is connected to the crushing device, and the two input ends are respectively connected to the end of the reciprocating screen and the end of the grading vibrating screen.

[0014] In the rubber powder production system as described above, a spray pipe is arranged above the crushing device, and the spray pipe has a spray head; the spray head is directed toward the gap between the active roller and the passive roller.

[0015] In the rubber powder production system as described above, a thickness measuring device is provided above the secondary vibrating screen, and the thickness measuring device is electrically connected to the controller.

[0016] In the rubber powder production system as described above, the reciprocating screen and the grading vibrating screen are both inclined, and the inclination angle is 0-5 degrees.

[0017] In the rubber powder production system as described above, a discharge trough is provided at the end of the secondary vibrating screen, and a collecting trough is provided at the bottom of the secondary vibrating screen; a rubber powder collecting tank is connected to the discharge trough, and a fine rubber powder collecting tank is provided on the collecting trough.

[0018] In the rubber powder production system as described above, a first magnetic separation filter is provided between the discharge trough and the rubber powder collecting tank; and a second magnetic separation filter is provided between the fine rubber powder collecting tank and the collecting trough.

[0019] In the embodiment of the utility model, the temperature and particle size of the rubber powder are measured to control the size of the gap during the crushing process of the rubber powder, so that the production of the rubber powder can maintain a suitable temperature and particle size, thereby improving the quality of the rubber powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structural diagram of the rubber powder production system of the embodiment of the utility model;

[0021] Figure 2 This is a structural diagram of a crushing device of a rubber powder production system according to an embodiment of the utility model;

[0022] Figure 3 This is a structural diagram of a grading vibration screen of a rubber powder production system according to an embodiment of the utility model;

[0023] Figure 4 This is a structural diagram of a secondary vibrating screen in a rubber powder production system according to an embodiment of the utility model. DETAILED DESCRIPTION

[0024] The rubber powder production system described in the utility model can be made of the following materials and components, but is not limited to the following materials and components, such as: a crushing device, a screening device, a vibrating screen, a pneumatic blowing device, a magnetic separation device, a chute, a metal separator, a transmission belt, etc.

[0025] like Figure 1 The figure shows the overall structure of the rubber powder production system of the utility model embodiment; Figures 2 to 4 The raw material used in the rubber powder production system of this embodiment is waste tires.

[0026] The rubber powder production system of this embodiment includes: a crushing device 2, a reciprocating screen 24, a magnetic separation device 5, a grading vibrating screen 3 and a secondary vibrating screen 4 connected in sequence; usually, this embodiment also includes: a slicing device 1 and a conveyor belt 10; the slicing device 1 is connected to the crushing device 2 through the conveyor belt 10.

[0027] The block cutting device 1 is used to cut the waste tires into rubber blocks of a certain size, so as to facilitate subsequent crushing.

[0028] Generally, the magnetic separation device 5 is provided with a diversion guide groove 50 ; the upper end of the diversion guide groove 50 is connected to the magnetic separation device 5 , and the lower end thereof is connected to a wire packing and collecting device 51 .

[0029] The system of this embodiment also includes: a reverse conveyor belt 28; the reverse conveyor belt 28 includes: two input ends and one output end; the output end is connected to the crushing device 2, and the two input ends are respectively connected to the end of the reciprocating screen 24 and the end of the grading vibrating screen 3.

[0030] like Figure 2 As shown; the crushing device 2 includes: a shell, an active roller 21, a passive roller 22 and a gap adjustment device 20; the active roller 21 and the passive roller 22 are meshed with each other and are both installed on the shell; the passive roller 22 is installed on the shell through the gap adjustment device 20; the meshing gap between the active roller 21 and the passive roller 22 is the gap of the broken rubber block; the gap adjustment device 20 is used to control the gap size between the active roller 21 and the passive roller 22, and the gap adjustment device 20 generally includes: a hydraulic rod and a sliding groove; the passive roller 22 is installed in the sliding groove and can slide left and right; the hydraulic rod is connected to the shaft mounting seat of the passive roller 22, so that the shaft mounting seat of the passive roller 22 is close to or away from the active roller 21.

[0031] The system of this embodiment further includes: a controller, an ultrasonic thickness measuring device 27 and a temperature sensor 36; the ultrasonic thickness measuring device 27 is installed above the reciprocating screen 24, and the temperature sensor 36 is installed above the grading vibrating screen 3; the temperature sensor 36 is generally an infrared sensor. The ultrasonic thickness measuring device 27 is generally an ultrasonic distance probe.

[0032] The ultrasonic thickness measuring device 27 , the temperature sensor 36 , and the gap adjusting device 20 are all electrically connected to the controller.

[0033] Generally, the reciprocating screen 24 and the grading vibrating screen 3 are both inclined, and the inclination angle is 0-5 degrees.

[0034] In addition, a discharge trough is provided at the end of the secondary vibration screen 4, and a collecting trough is provided at the bottom of the secondary vibration screen 4; a rubber powder collecting tank 6 is connected to the discharge trough, and a fine rubber powder collecting tank 7 is provided on the collecting trough.

[0035] Furthermore, a first magnetic separation filter is provided between the discharge trough and the rubber powder collecting tank 6; and a second magnetic separation filter is provided between the fine rubber powder collecting tank 7 and the collecting trough.

[0036] When the present embodiment is used, the waste tires are firstly put into the cutting device 1 and cut into rubber blocks of a certain size, and then added to the active roller 21 and the passive roller 22 of the crushing device 2 through the conveyor belt 10 for crushing and separation. The rubber material after the first crushing by the crushing device 2 is preliminarily screened under the action of the reciprocating screen 24, and the part of the rubber powder that cannot pass through the screen re-enters the crushing device 2 through the reverse conveyor belt 28 for further crushing.

[0037] The thickness of the material layer on the reciprocating screen 24 is sensed by the ultrasonic thickness measuring device 27. At this time, the upper layer of the reciprocating screen is a mixture of rubber powder and steel wire; the mixture is diverted after passing through the magnetic separation device 5, and the steel wire in it passes through the diversion guide 50 and enters the steel wire packaging device 51 as a finished product for weighing and packaging. Other rubber powder enters the grading vibration screen 3, and the rubber powder that cannot pass through the screen re-enters the crushing device 2 through the reverse conveyor belt 28 for re-crushing. Other rubber powder enters the metal separator 35. The rubber powder passing through the metal separator 35 is cooled and conveyed by the pneumatic blowing device, and then enters the secondary vibration screen 4. Finally, it is weighed and packaged after magnetic separation.

[0038] A 20-mesh sieve is used for graded vibration screening, and a 55-mesh sieve is used for secondary vibration screening. The rubber powder on the upper layer of the secondary vibration screen is used to produce recycled rubber. All-steel load-bearing tires are used as raw materials. The iron content is tested according to GB / T 19208-2020 "Vulcanized Rubber Powder". The prepared recycled rubber is compared with traditional grinding.

[0039]

[0040]

[0041] In the embodiment of the utility model, the temperature and particle size of the rubber powder are measured to control the size of the gap during the crushing process of the rubber powder, so that the production of the rubber powder can maintain a suitable temperature and particle size, thereby improving the quality of the rubber powder.

[0042] The controller in this embodiment is a programmable controller. During actual use, when the temperature detected by the temperature sensor 36 exceeds a preset value, the controller sends a command to the gap adjustment device 20, thereby increasing the crushing gap and improving the particle size; when the temperature does not exceed the preset value, the thickness measured by the ultrasonic thickness measuring device 27 exceeds the preset value, and the crushing gap is appropriately reduced.

[0043] In the rubber powder production system of this embodiment, a pneumatic blowing device 39 is provided between the grading vibration screen 3 and the secondary vibration screen 4; a metal separator 35 is provided between the pneumatic blowing device 39 and the grading vibration screen 4. The pneumatic blowing device 39 can not only transport the rubber powder, but also cool the rubber powder, thereby facilitating subsequent fine screening and packaging. The metal separator 35 can be a shell-and-tube metal separator to remove iron powder and fine metal particles in the rubber powder again.

[0044] like Figure 2 As shown, a spray pipe is arranged above the crushing device 2, and the spray pipe has a spray head 25; the spray head 25 is directed toward the gap between the active roller 21 and the passive roller 22. The spray pipe is used to cool the crushing device, thereby ensuring long-term operation.

[0045] A temperature sensing probe 26 is also provided above the crushing device 2. The temperature sensing probe 26 is used to detect the temperature during crushing, thereby controlling the flow rate of the nozzle 25 to save water.

[0046] In the rubber powder production system of this embodiment, a thickness measuring device 47 is provided above the secondary vibrating screen 4, and the thickness measuring device 47 is electrically connected to the controller.

[0047] The thickness measuring device 47 is used to detect the particle size of the crushed rubber powder and the screening condition, so as to facilitate the subsequent packaging and quality inspection.

[0048] In addition, the rubber powder production system of the utility model has low production cost, good finished product quality, compact structural design, low metal content, stable and efficient working process, and is suitable for equipment and systems for producing recycled rubber powder from various waste tires.

[0049] The serial numbers of the above-mentioned embodiments of the utility model are only for description and do not represent the advantages and disadvantages of the embodiments. Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of some deformations plus the necessary general technology superposition; of course, it can also be implemented by simplifying some important technical features. Based on this understanding, the technical solution of the utility model is essentially or the part that contributes to the prior art is: the overall structure and connection method, and the structure described in each embodiment of the utility model.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A rubber powder production system, characterized in that: include: A crushing device, a reciprocating screen, a magnetic separation device, a grading vibrating screen and a secondary vibrating screen connected in sequence; The crushing device comprises: a shell, an active roller, a passive roller and a gap adjustment device; the active roller and the passive roller are meshed with each other and are both installed on the shell; the passive roller is installed on the shell through the gap adjustment device; The system further comprises: a controller, an ultrasonic thickness measuring device and a temperature sensor; the ultrasonic thickness measuring device is installed above the reciprocating screen, and the temperature sensor is installed above the grading vibrating screen; The ultrasonic thickness measuring device, the temperature sensor, and the gap adjusting device are all electrically connected to the controller.

2. The rubber powder production system according to claim 1, characterized in that: The magnetic separation device is provided with a diversion guide groove; the upper end of the diversion guide groove is connected to the magnetic separation device, and the lower end thereof is connected to a steel wire packaging and collecting device.

3. The rubber powder production system according to claim 2, characterized in that: A pneumatic blowing device is arranged between the grading vibration screen and the secondary vibration screen; a metal separator is arranged between the pneumatic blowing device and the grading vibration screen.

4. The rubber powder production system according to any one of claims 1 to 3, characterized in that: The system further comprises: a block cutting device and a conveyor belt; the block cutting device is connected to the crushing device via the conveyor belt.

5. The rubber powder production system according to any one of claims 1 to 3, characterized in that: The system further comprises: a reverse conveyor belt; the reverse conveyor belt comprises: two input ends and one output end; the output end is connected to the crushing device, and the two input ends are respectively connected to the end of the reciprocating screen and the end of the grading vibrating screen.

6. The rubber powder production system according to any one of claims 1 to 3, characterized in that: A spray pipe is arranged above the crushing device, and the spray pipe has a spray head; the spray head faces the gap between the active roller and the passive roller.

7. The rubber powder production system according to any one of claims 1 to 3, characterized in that: A thickness measuring device is arranged above the secondary vibrating screen and is electrically connected to the controller.

8. The rubber powder production system according to any one of claims 1 to 3, characterized in that: A discharge trough is arranged at the end of the secondary vibration screen, and a collecting trough is arranged at the bottom of the secondary vibration screen; a rubber powder collecting tank is connected to the discharge trough, and a fine rubber powder collecting tank is arranged on the collecting trough.

9. The rubber powder production system according to claim 8, characterized in that: A first magnetic separation filter is arranged between the discharge trough and the rubber powder collecting tank; and a second magnetic separation filter is arranged between the fine rubber powder collecting tank and the collecting trough.

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