Double-toothed roller crusher with screening function

Abstract

This invention relates to the field of crushing machinery technology and discloses a double-toothed roller crusher with screening function. By constructing a closed-loop adaptive control system consisting of a material detection device, a controller, and a screening parameter adjustment mechanism, the crushing and screening process achieves real-time perception and dynamic response to changes in the characteristics of the incoming material. When the moisture content or particle size distribution of the material fluctuates, the controller can automatically generate and execute targeted parameter adjustment commands. For example, when the moisture content increases, the vibration frequency and screen tilt angle of the screening device are increased simultaneously, and the toothed roller speed is reduced, thereby effectively preventing the adhesion and clogging of wet and sticky materials on the screen surface and maintaining the stability of screening efficiency and processing capacity. When the fine particle content is too high, the toothed roller speed is appropriately increased and the crushing gap is reduced to avoid qualified materials being repeatedly crushed in the crushing chamber, significantly reducing the over-crushing rate, reducing ineffective energy consumption and equipment wear.

Description

Technical Field

[0001] This invention relates to the field of crushing machinery technology, and in particular to a double-toothed roller crusher with screening function. Background Technology

[0002] In industries such as mining, coal preparation, metallurgy, and building materials, the double-toothed roll crusher is a widely used key crushing equipment. It primarily uses two relatively rotating toothed rolls to apply shearing, splitting, and compressing actions to materials to achieve coarse or medium crushing. To obtain the finished particle size required by downstream processes, a screening device is usually installed at the discharge port of the double-toothed roll crusher. In actual production operation, core operating parameters such as the rotational speed of the toothed rolls, the crushing gap between the toothed rolls, the vibration frequency of the screening device, and the inclination angle of the screen surface are generally set to fixed values ​​based on the design average characteristics of the material being processed during the equipment commissioning phase, or are manually adjusted periodically by operators based on experience during production.

[0003] However, in actual production conditions, the physical properties of incoming materials, especially moisture content and particle size distribution, fluctuate significantly and frequently due to factors such as mining layer, stockpiling time, and climatic conditions. Fixed operating parameters or delayed manual adjustments are difficult to adapt to these dynamic changes, directly leading to numerous technical problems. For example, when the moisture content of the material suddenly increases, the preset vibration frequency and screen angle cannot effectively overcome the adhesion and accumulation of wet and sticky materials on the screen surface, causing screen blockage, a sharp decline in screening efficiency, and a significant drop in crusher capacity. Conversely, when the fine particle content in the material is abnormally high, maintaining the original high-intensity crushing parameters will cause a large amount of qualified material to be over-crushed in the crushing chamber, which not only increases ineffective energy consumption and equipment wear but also reduces the yield and particle size uniformity of the product. Summary of the Invention

[0004] This application discloses a double-toothed roller crusher with screening function to solve the technical problems of existing crushing and screening machines in related technologies, which cannot adapt to the real-time fluctuations of the moisture content and particle size composition of the incoming material due to fixed or lagging manually adjusted working parameters, resulting in decreased screening efficiency, serious over-crushing, increased energy consumption and insufficient level of intelligence.

[0005] To solve the above problems, the present invention adopts the following technical solution: This invention provides a double-toothed roller crusher with screening function, comprising: The crushing chamber has an inlet and an outlet at opposite ends; The first and second toothed rollers are installed inside the crushing chamber; A drive system for driving the first toothed roller and the second toothed roller; A screening device is installed at the discharge port; A material detection device is installed at the inlet and / or the outlet to acquire information characterizing the moisture content and particle size distribution of the material. The controller is electrically connected to the material detection device; The screening parameter adjustment mechanism is driven and connected to the screening device and signal-connected to the controller. The controller is configured to: receive the information characterizing the moisture content and particle size distribution of the material, generate control commands for adjusting the working parameters of the screening device and / or the working parameters of the toothed roller, and send the control commands to the screening parameter adjustment mechanism and / or the drive system.

[0006] Preferably, the material detection device includes a microwave moisture content detection sensor and a machine vision particle size detection device.

[0007] Preferably, the screening device includes a screen box and a vibrator; the screening parameter adjustment mechanism includes: A frequency adjustment unit, connected to the vibrator, is used to adjust the vibration frequency of the vibrating screen according to the control command. An angle adjustment unit, connected to the screen box, is used to adjust the tilt angle of the screen box relative to the horizontal plane according to the control command.

[0008] Preferably, the vibrator is driven by a variable frequency motor, the frequency adjustment unit is a frequency converter electrically connected to the variable frequency motor, and the angle adjustment unit is a hydraulic cylinder or an electric push rod, one end of which is hinged to the crusher frame or the ground, and the other end is hinged to the screen box.

[0009] Preferably, the device further includes a crushing parameter adjustment mechanism connected to the controller signal. The crushing parameter adjustment mechanism is used to adjust the rotational speed of the first toothed roller and / or the second toothed roller, and / or adjust the crushing gap between the first toothed roller and the second toothed roller according to the control command issued by the controller.

[0010] Preferably, the controller is configured to: when receiving a detection signal indicating that the moisture content of the material exceeds a set threshold, generate a first set of control instructions for reducing the toothed roller speed, increasing the vibration frequency of the screening device, and / or increasing the tilt angle of the screen surface; When a detection signal indicating that the fine particle content in the material exceeds a set threshold is received, a second set of control instructions is generated to increase the toothed roller speed, reduce the crushing gap, and / or reduce the vibration frequency of the screening device.

[0011] Preferably, the screening device includes at least two stages of screen plates arranged sequentially along the material flow direction with decreasing screen aperture size.

[0012] Preferably, the controller is a PLC programmable logic controller or an industrial computer, which has an analog input module for receiving signals from the material characteristic detection device, and an analog output module or a digital output module for sending control commands to the screening parameter adjustment actuator.

[0013] The technical solution adopted in this invention can achieve the following beneficial effects: This application constructs a closed-loop adaptive control system consisting of a material detection device, a controller, and a screening parameter adjustment mechanism. This system enables real-time sensing and dynamic response to changes in the characteristics of incoming materials during the crushing and screening process. When the moisture content or particle size distribution of the material fluctuates, the controller automatically generates and executes targeted parameter adjustment commands. For example, when the moisture content increases, it simultaneously increases the vibration frequency and screen tilt angle of the screening device and reduces the toothed roller speed, effectively preventing the adhesion and clogging of wet, sticky materials on the screen surface and maintaining stable screening efficiency and processing capacity. When the fine particle content is high, it appropriately increases the toothed roller speed and reduces the crushing gap, preventing qualified materials from being repeatedly crushed in the crushing chamber, significantly reducing over-crushing rate, and minimizing ineffective energy consumption and equipment wear. This solution transforms the operator's experience-based judgment into a quantitative decision-making model for the controller, eliminating the response lag and insufficient precision of manual adjustments. This gives the double-toothed roller crushing and screening system adaptive capabilities for complex and variable working conditions, significantly improving the intelligent operation level and overall production efficiency of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a double-toothed roller crusher with screening function disclosed in some embodiments of this application.

[0016] In the picture: 1. A double-toothed roller crusher with screening function; 10. Crushing chamber; 11. First toothed roller; 12. Second toothed roller; 13. Screening device; 14. Material detection device; 15. Controller; 16. Screening parameter adjustment mechanism; 17. Crushing parameter adjustment mechanism; 18. Drive system; 100. Feed inlet; 101. Discharge outlet; 130. Screen box; 131. Vibrator; 132. Screen plate; 160. Frequency adjustment unit; 161. Angle adjustment unit. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] In existing double-toothed roller crushers, the operating parameters such as roller speed, crushing gap, vibration frequency of the screening device, and screen inclination angle are usually set to fixed values ​​based on the design conditions during the equipment commissioning phase, or rely on operators to make periodic manual adjustments based on experience. When the moisture content or particle size distribution of the incoming material fluctuates in real time due to factors such as changes in the mining face or weather effects, the fixed parameters cannot adapt, and manual adjustments suffer from lag and poor precision, leading to a series of problems such as clogging of the screening device, severe over-crushing, and increased energy consumption. Therefore, the first embodiment of this application provides a double-toothed roll crusher with adaptive adjustment capability.

[0020] The following is in conjunction with the appendix Figure 1 The present application provides a detailed description of a double-toothed roller crusher 1 with screening function through specific embodiments and application scenarios.

[0021] An embodiment of the present invention provides a double-toothed roller crusher 1 with screening function, comprising a crushing chamber 10, with an inlet 100 and an outlet 101 respectively provided at opposite ends; a first toothed roller 11 and a second toothed roller 12 installed in the crushing chamber 10; a drive system 18 for driving the first toothed roller 11 and the second toothed roller 12; a screening device 13 disposed at the outlet 101; a material detection device 14 disposed at the inlet 100 and / or the outlet 101 for acquiring information characterizing the moisture content and particle size distribution of the material; a controller 15 electrically connected to the material detection device 14; and a screening parameter adjustment mechanism 16 drivenly connected to the screening device 13 and signal-connected to the controller 15. The controller 15 is configured to: receive information characterizing the moisture content and particle size distribution of the material, generate control commands for adjusting the working parameters of the screening device 13 and / or the toothed rollers, and send the control commands to the screening parameter adjustment mechanism 16 and / or the drive system 18.

[0022] Specifically, the first toothed roller 11 and the second toothed roller 12 are arranged in parallel in the crushing chamber 10. Multiple crushing teeth are fixed on the roller body by bolts or welding. The crushing teeth are made of high manganese steel or cast hard alloy. The drive system 18 consists of two variable frequency motors and a planetary reducer. Each variable frequency motor is connected to the input shaft of the reducer through a hydraulic coupling. The output shaft of the reducer is connected to the shaft end of the toothed roller through a drum gear coupling, thereby realizing independent drive and stepless speed adjustment.

[0023] The working process of this embodiment is as follows: the material to be crushed enters the crushing chamber 10 from the feed inlet 100, and the first toothed roller 11 and the second toothed roller 12 rotate relative to each other to split and crush the material; the material detection device 14 arranged at the feed inlet 100 and the discharge outlet 101 collects the moisture content and particle size distribution signals of the material in real time and transmits them to the controller 15; the controller 15 calculates the optimal toothed roller speed, vibrating screen frequency and screen surface angle adapted to the current material state according to the preset model, and then sends adjustment commands to the frequency converter of the drive system 18 and the frequency converter and hydraulic solenoid valve of the screening parameter adjustment mechanism 16. This allows the crushing and screening parameters to dynamically match the characteristics of the incoming material. Through this closed-loop adaptive adjustment, the crusher can automatically reduce the roller speed to prevent material blockage when the moisture content of the material suddenly increases, while increasing the screening frequency and screen angle to prevent wet material from adhering to the screen. When the fine particle content of the material is too high, the roller speed is automatically increased and the screening frequency is reduced to avoid the qualified particles being over-crushed. As a result, the equipment is always in a highly efficient and stable working state, significantly improving the intelligence level and comprehensive capacity of the crushing and screening system, and effectively solving the problems of untimely response and poor accuracy of fixed parameters and manual adjustment in the existing technology.

[0024] Furthermore, the material detection device 14 includes a microwave moisture content detection sensor and a machine vision particle size detection device.

[0025] Specifically, the microwave moisture content detection sensor can be an online moisture meter based on the resonant cavity perturbation principle. Its probe is flange-mounted at the side wall opening of the feed chute, with the probe surface flush with the chute liner, so as not to affect the material flow. The sensor emits microwaves of a specific frequency, which penetrate a material layer of a certain thickness. Based on the material's absorption of microwave energy and the degree of phase delay, combined with a temperature compensation algorithm, it can output a moisture content value with an accuracy of ±0.5% in real time.

[0026] The machine vision particle size detection device consists of two megapixel CCD industrial cameras and matching LED strip light sources. The cameras are installed in a closed dust cover above the feed end of the screening device 13 to vertically capture the material flow moving on the screen surface. The acquired images are then transmitted to the dedicated image processing module of the controller 15. Through edge detection and particle segmentation algorithms, the cumulative distribution percentage of particles larger or smaller than each particle size range is calculated.

[0027] In practical applications, near-infrared moisture meters can also be used as microwave moisture content sensors, and linear scan cameras can also be used as machine vision particle size detection devices. This application does not limit these options.

[0028] Understandably, since moisture content and particle size distribution are the core inputs for the controller 15 to make decisions, this combination of high-precision and fast-response detection methods ensures that the data foundation of the adaptive control system has sufficient real-time performance and accuracy, providing a reliable basis for subsequent precise adjustment.

[0029] Furthermore, the screening device 13 includes a screen box 130 and a vibrator 131; the screening parameter adjustment mechanism 16 includes: a frequency adjustment unit 160, connected to the vibrator 131, for adjusting the vibration frequency of the vibrating screen according to the control command; and an angle adjustment unit 161, connected to the screen box 130, for adjusting the tilt angle of the screen box 130 relative to the horizontal plane according to the control command.

[0030] Specifically, the vibrator 131 is a box-type vibrator 131, which is fixed on the side plate of the screen box 130. Inside, there is a pair of meshing gears and an eccentric block. The frequency adjustment unit 160 is composed of a vector frequency converter. The output end of the frequency converter is connected to the stator winding of the frequency conversion motor that drives the vibrator 131. The angle adjustment unit 161 is composed of two sets of parallel hydraulic cylinders. The piston rod end of the hydraulic cylinder is hinged to the screen box 130 through a spherical bearing, and the cylinder body end is fixedly connected to the frame through a trunnion.

[0031] Understandably, when the moisture content of the material increases, the controller 15 issues a command, and the frequency adjustment unit 160 increases the vibration frequency of the vibrator 131, thereby increasing the projection angle of the material on the screen surface and accelerating the conveying speed, preventing the accumulation and adhesion of wet and sticky materials on the screen surface. At the same time, the angle adjustment unit 161 increases the tilt angle of the screen surface to further accelerate the discharge. Conversely, when the material is dry and contains a lot of fine powder, the frequency and angle are appropriately reduced to extend the screening time and improve the screening accuracy. The coordinated adjustment of frequency and angle enables the screening device 13 to form the optimal combination of kinematic parameters for different material characteristics, ensuring the stability of screening efficiency and processing capacity.

[0032] Furthermore, the vibrator 131 is driven by a variable frequency motor, the frequency adjustment unit 160 is a frequency converter electrically connected to the variable frequency motor, and the angle adjustment unit 161 is a hydraulic cylinder or an electric push rod, one end of which is hinged to the crusher frame or the ground, and the other end is hinged to the screen box 130.

[0033] Specifically, the variable frequency motor is a three-phase asynchronous motor, and its output shaft is connected to the input shaft of the vibrator 131 via a flexible coupling. The frequency converter is a heavy-duty vector frequency converter with sensorless vector control function, which can provide low-speed high torque output.

[0034] This driving method enables rapid and precise adjustment of vibration frequency and screen angle. For example, from receiving a signal that the moisture content exceeds the limit to adjusting the vibration frequency to the target value, the entire process can be completed within seconds. The full stroke time of the hydraulic cylinder or electric push rod is also less than 3 seconds. This rapid response capability ensures that the adaptive control system can promptly compensate for sudden changes in the characteristics of the incoming material, avoiding the cumulative effects of accumulation or blockage.

[0035] Furthermore, the double toothed roller crusher 1 with screening function provided in this application embodiment also includes a crushing parameter adjustment mechanism 17 connected to the controller 15 by signal. The crushing parameter adjustment mechanism 17 is used to adjust the rotation speed of the first toothed roller 11 and / or the second toothed roller 12, and / or adjust the crushing gap between the first toothed roller 11 and the second toothed roller 12 according to the control command issued by the controller 15.

[0036] Specifically, in the crushing parameter adjustment mechanism 17, the actuator for adjusting the toothed roller speed reuses the variable frequency motor and frequency converter of the drive system 18. The controller 15 changes the motor speed by sending different frequency commands to the frequency converter, thereby adjusting the rotation speed of the toothed roller. The bearing seat of each toothed roller is movable in the frame slide. The extension and retraction of the hydraulic cylinder pushes the bearing seat to translate, thereby changing the minimum distance between the two toothed rollers.

[0037] Understandably, by incorporating crushing parameters into an adaptive control closed loop, the controller 15 can simultaneously coordinate the working parameters of the crushing and screening processes based on material characteristics. For example, when the incoming material has a high moisture content and reduced hardness, the roller spacing can be appropriately increased and the roller speed reduced to decrease the crushing ratio and reduce powder generation. When the incoming material contains many lumps and has high hardness, the roller spacing can be reduced and the roller speed increased to enhance crushing capacity. This linkage adjustment breaks down the barrier of independently setting crushing and screening parameters in traditional equipment, achieving synergistic optimization of the entire process.

[0038] Furthermore, for a specific control strategy, the controller 15 is configured to: when receiving a detection signal indicating that the moisture content of the material exceeds a set threshold, generate a first set of control instructions for reducing the toothed roller speed, increasing the vibration frequency of the screening device 13, and / or increasing the screen surface tilt angle; and when receiving a detection signal indicating that the fine particle content in the material exceeds a set threshold, generate a second set of control instructions for increasing the toothed roller speed, reducing the crushing gap, and / or reducing the vibration frequency of the screening device 13.

[0039] Specifically, the threshold values ​​can be set by the operator through the human-machine interface according to the actual working conditions. In this embodiment, the moisture content threshold is set to 8%, and the fine particle (less than 3mm) content threshold is set to 30%. The internal program of the controller 15 adopts a rule-based forward inference mechanism. When the real-time moisture content is greater than 8%, the first control instruction set is triggered. The specific instructions are: the target value of the toothed roller speed is reduced by 20% based on the original set value, the target value of the screening frequency is increased by 5Hz, and the target value of the screen surface angle is increased by 5°. To prevent system oscillation, the change rate limit is set in the instruction, such as the speed change rate not exceeding 50 revolutions per minute and the frequency change rate not exceeding 1Hz per second. When the real-time fine particle content is higher than 30%, the second control instruction set is triggered: the toothed roller speed is increased by 15%, the crushing gap is reduced to the design minimum allowable value, and the screening frequency is reduced by 3Hz.

[0040] Understandably, this dual-threshold hierarchical control strategy solidifies the operator's experience into quantifiable control rules, enabling the controller 15 to make reasonable parameter adjustment decisions for different working conditions, just like a skilled operator. Moreover, the adjustment process is unmanned and responds promptly. The entire cycle from detecting parameter changes to actual execution completion does not exceed 10 seconds. Actual operation shows that after adopting this control logic, the screening efficiency under wet and sticky material conditions can be maintained above 85%, and the over-crushing rate is reduced by about 40%, effectively solving the problems of blind and delayed parameter setting.

[0041] Furthermore, the screening device 13 includes at least two stages of screen plates 132 arranged sequentially along the material flow direction with decreasing screen aperture size.

[0042] Specifically, the upper screen plate 132 has a screen aperture size of 50mm×50mm; the lower screen plate 132 has a screen aperture size of 25mm×25mm; both screen plates 132 are fixed on the crossbeams inside the screen box 130. The feed end to the discharge end of the screen box 130 has a certain downward inclination angle. The crushed material first falls onto the upper screen plate 132. Oversized material larger than 50mm is discharged from the end of the upper screen plate 132 and returned to the crusher via the return conveyor belt; intermediate products from 50mm to 25mm are discharged from the end of the lower screen plate 132 and can be used as another finished product; fine particles smaller than 25mm pass through the lower screen plate 132 and fall into the collection hopper at the bottom of the screen box 130. Through this multi-stage screening structure, multiple particle size grades of products can be obtained in one crushing, reducing the equipment investment in subsequent grading and screening processes and improving the integration and economy of the production line.

[0043] Furthermore, the controller 15 is a PLC programmable logic controller 15 or an industrial computer, which has an analog input module for receiving signals from the material characteristic detection device, and an analog output module or a digital output module for sending control commands to the screening parameter adjustment actuator.

[0044] In one specific embodiment, the controller 15 is a medium-sized PLC with an Ethernet communication interface. Its CPU module integrates logic control and data processing functions. The analog input module is a standard module with 8 channels, 16-bit resolution, and supports 4-20mA current input, used to collect data from the microwave moisture meter and camera image processing board. The analog output module is a module with 4 channels, 12-bit resolution, and can output 0-10V voltage or 4-20mA current, used to control the frequency converter and proportional valve amplifier. The digital output module is a 16-channel relay output type, used to control the direction of the hydraulic solenoid valve.

[0045] Meanwhile, in practical applications, the PLC solution has high reliability and strong anti-interference ability, making it suitable for harsh mining environments; the industrial computer solution has stronger computing power, making it suitable for occasions that require running complex image processing algorithms and artificial intelligence models. This application does not limit this aspect.

[0046] Specifically, after power-on, the controller 15 automatically runs its built-in control program, periodically scans the analog input channels, reads the moisture content and particle size distribution values, executes the aforementioned control logic calculations, and sends the generated control commands to each actuator through the analog and digital output channels. This hardware architecture features simple wiring, is easy to expand, and ensures real-time transmission and accurate execution of control commands, providing a stable and reliable physical foundation for the overall closed-loop adaptive system.

[0047] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0048] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-toothed roller crusher having a screening function, characterized by, include: The crushing chamber has an inlet and an outlet at opposite ends; The first and second toothed rollers are installed inside the crushing chamber; A drive system for driving the first toothed roller and the second toothed roller; A screening device is installed at the discharge port; A material detection device is installed at the inlet and / or the outlet to acquire information characterizing the moisture content and particle size distribution of the material. The controller is electrically connected to the material detection device; The screening parameter adjustment mechanism is driven and connected to the screening device and signal-connected to the controller. The controller is configured to: receive the information characterizing the moisture content and particle size distribution of the material, generate control commands for adjusting the working parameters of the screening device and / or the working parameters of the toothed roller, and send the control commands to the screening parameter adjustment mechanism and / or the drive system.

2. Double-toothed roller crusher with screening function according to claim 1, characterized in that The material detection device includes a microwave moisture content detection sensor and a machine vision particle size detection device.

3. The double-toothed roller crusher having a screening function according to claim 1, characterized in that, The screening device includes a screen box and a vibrator; the screening parameter adjustment mechanism includes: A frequency adjustment unit, connected to the vibrator, is used to adjust the vibration frequency of the vibrating screen according to the control command. An angle adjustment unit, connected to the screen box, is used to adjust the tilt angle of the screen box relative to the horizontal plane according to the control command.

4. The double-toothed roller sizer crusher according to claim 3, characterized in that, The vibrator is driven by a variable frequency motor, the frequency adjustment unit is a frequency converter electrically connected to the variable frequency motor, and the angle adjustment unit is a hydraulic cylinder or an electric push rod, one end of which is fixed to the crusher frame or the ground, and the other end is hinged to the screen box.

5. The double-toothed roller crusher having a screening function according to claim 1, characterized in that, It also includes a crushing parameter adjustment mechanism connected to the controller signal, the crushing parameter adjustment mechanism being used to adjust the rotational speed of the first toothed roller and / or the second toothed roller, and / or adjust the crushing gap between the first toothed roller and the second toothed roller according to the control command issued by the controller.

6. Double-toothed roller crusher with screening function according to claim 5, characterized in that The controller is configured to generate a first set of control instructions for reducing the toothed roller speed, increasing the vibration frequency of the screening device, and / or increasing the tilt angle of the screen surface when a detection signal indicating that the moisture content of the material exceeds a set threshold is received. When a detection signal indicating that the fine particle content in the material exceeds a set threshold is received, a second set of control instructions is generated to increase the toothed roller speed, reduce the crushing gap, and / or reduce the vibration frequency of the screening device.

7. The double-toothed roller sizer crusher according to claim 1, characterized in that, The screening device includes at least two stages of screen plates arranged sequentially along the material flow direction with decreasing screen aperture size.

8. The double-toothed roller sizer crusher according to claim 1, characterized in that, The controller is a PLC programmable logic controller or an industrial computer, which has an analog input module for receiving signals from the material characteristic detection device, and an analog output module or a digital output module for sending control commands to the screening parameter adjustment actuator.

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