Granularity-adjustable roller type crushing station with terminal screening and crushing functions

Abstract

The invention discloses a particle-size-adjustable roller type crushing station with a terminal screening and crushing function. The particle-size-adjustable roller type crushing station is mainly used for crushing coal, clay, shale, frozen soil, silty sandstone and other similar materials with low compressive strength. The roller crusher comprises a rack, a feeding hopper and a discharging hopper, the device comprises a fixed crushing roller, a fixed crushing roller driving device, a fixed crushing roller mud scraping device, a movable crushing roller, a movable crushing roller driving device, a movable crushing roller mud scraping device, a discharged material screening crushing roller system, a discharged material screening crushing roller system driving device, a discharged material screening crushing roller system mud scraping device and a discharged material screening crushing roller system speed monitoring device. According to the roller type crusher, secondary crushing can be carried out on residual large materials in discharged materials after primary crushing, and it is guaranteed that the particle size of the discharged materials meets the design requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of mining machinery, and in particular relates to a roller crushing station with adjustable particle size and terminal screening and crushing functions. Background Art

[0002] When using a double-toothed roller crusher to crush coal, clay, shale, frozen soil, silty sandstone and other similar materials, the maximum feed size is often 500-600mm, and the discharge size is sometimes required to be 40mm. During the design, in order to ensure that the crusher can bite the material smoothly, the roller teeth cannot be designed too small, which will result in some large pieces of material exceeding the finished product size requirement leaking from the roller teeth during production, making it difficult to meet the discharge requirement of 100% less than the design requirement, which brings difficulties to the subsequent process equipment production.

[0003] Therefore, it is considered to add a discharging screening and crushing roller below the toothed roller crusher to first screen out the materials that meet the particle size requirements, and the remaining large materials will be crushed for the second time during the transportation process. Summary of the invention

[0004] Purpose of the invention: The present invention provides a roller crushing station with adjustable particle size and terminal screening and crushing function, which performs secondary crushing of materials by adding a discharging screening and crushing roller to ensure that the discharging particle size meets the design requirements.

[0005] Technical solution: The present invention proposes a roller crushing station with adjustable particle size and terminal screening and crushing function, comprising a frame, a feed hopper and a discharge hopper fixedly connected to the frame, a fixed crushing roller and a movable crushing roller located on the upper part of the frame, and a discharge screening and crushing roller system located on the lower part of the frame; the discharge screening and crushing roller system is located below the fixed crushing roller and the movable crushing roller, the discharge screening and crushing roller system comprises a plurality of screening rollers arranged in parallel, a first screening roller and a second screening roller, the first screening roller is located between the most downstream screening roller and the second screening roller, when the discharge screening and crushing roller system is in operation, the screening roller and the first screening roller rotate in the forward direction along the material flow direction, the second screening roller rotates in the reverse direction along the material flow direction, and the rotation speed of the screening roller located downstream along the material flow direction gradually increases compared with the rotation speed of the upstream screening roller.

[0006] Preferably, the fixed crushing roller and the movable crushing roller rotate in opposite directions and have a differential speed.

[0007] Preferably, the movable crushing roller moves towards or away from the fixed position under the action of a hydraulic cylinder.

[0008] Preferably, the surfaces of the fixed crushing roller and the movable crushing roller are tooth-shaped, and the teeth of the fixed crushing roller and the movable crushing roller are staggered along the axis direction of the rollers.

[0009] Preferably, the fixed crushing roller is fixed on the frame, the fixed crushing roller is driven by a crushing roller driving device fixed on the back, the movable crushing roller has a movable crushing roller driving device fixed on the back, and the discharging screening crushing roller system is driven by the discharging screening crushing roller system driving device.

[0010] Preferably, each roller of the discharging screening and crushing roller system has an independent driving system, and the rotation direction of the roller is reversible and the rotation speed is adjustable.

[0011] Preferably, a plurality of scraping devices are provided below the discharging screening and crushing roller system, and a scraping device is provided below the screening roller, the first screening roller and the second screening roller.

[0012] Preferably, the axis of the first screening roller is lower than the axes of the most downstream screening roller and the second screening roller.

[0013] Preferably, a fixed crushing roller scraper device is provided below the fixed crushing roller, and a movable crushing roller scraper device is provided below the movable crushing roller.

[0014] Preferably, the discharging screening and crushing roller system is also provided with a speed monitoring device.

[0015] Beneficial effects: The present invention has a simple structure. By adding a discharging screening and crushing roller system under the traditional double-toothed roller crusher, the discharging screening and crushing roller system has the functions of screening and crushing. While screening out the fine materials that meet the particle size requirements of the finished product from the materials crushed by the double-toothed roller crusher, the remaining large pieces of material are crushed for the second time, so that the final discharging meets the particle size requirements. The gap between the rollers of the roller crusher and the gap between the screening and crushing rollers can be adjusted within a certain range, thereby adjusting the particle size of the finished product. The discharging screening and crushing roller system can be started under heavy load and has a mud scraping device. It has strong adaptability to materials with high soil content and high viscosity, and has protection functions such as speed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of the present invention;

[0017] Figure 2 is a top view of the upper double-toothed roller crusher of the present invention;

[0018] Figure 3 It is a top view of the discharging screening and crushing roller system of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the examples. It should be noted that the following examples are only used to explain the present invention and are not used to limit the present invention.

[0020] like Figure 1 , 2As shown in Figure 3, a roller crushing station with adjustable particle size and terminal screening and crushing function of the present invention comprises a frame 1, a feed hopper 2 and a discharge hopper 3 connected to the frame 1, a fixed crushing roller 4 and a movable crushing roller 5 are installed on the upper part of the frame 1, the fixed crushing roller 4 is driven by a fixed crushing roller driving device 6, and the movable crushing roller 5 is driven by a movable crushing roller driving device 7, a fixed crushing roller scraper 8 and a movable crushing roller scraper 9 are arranged below the crushing rollers, a discharge screening crushing roller system 10 is installed at the lower part of the frame 1, the discharge screening crushing roller system 10 is driven by a discharge screening crushing roller system driving device 11, and a scraper 12 is installed at the lower part of each roller of the discharge screening crushing roller system 10.

[0021] like Figure 1 , 2 As shown, the material is fed from the feed hopper 1 and falls between the fixed crushing roller 4 and the movable crushing roller 5 that rotate in opposite directions. Under the shearing and squeezing action of the two crushing rollers, the material is crushed. The fixed crushing roller 4 is fixed on the frame, and the movable crushing roller 5 can move along the slide rail on the frame toward or away from the fixed crushing roller 4. The movable crushing roller 5 is pushed by two hydraulic cylinders 501. Its functions are to ensure the crushing force of the roller, to adjust the gap between the two crushing rollers, and to retreat when there are iron blocks or other materials that are not easy to crush in the incoming materials, so as to protect the equipment. Scraping devices 8 and 9 are designed under the fixed crushing roller 4 and the movable crushing roller 5, which can automatically remove the sticky materials adhering to the surface of the rollers to ensure the crushing efficiency.

[0022] like Figure 1 , 3 As shown, the crushed material falls onto the discharging screening and crushing roller system 10 at the lower layer, and the material is screened and crushed in the process of being transported forward on the roller. The front part of the discharging screening and crushing roller system 10 is the screening roller 1001, and the rear end is divided into the first screening roller 1002 and the second screening roller 1003. The speed of the screening roller increases from front to back to form a differential speed, so that the screening roller also has a certain crushing effect while screening. After the screening effect of the front screening roller 1001, the fine material is basically screened off, and the remaining large pieces of material are transported to the tail screening roller. In order to ensure that the large pieces of material are smoothly bitten, the first screening roller 1002 sinks in the height direction compared with the two adjacent rollers. The first screening roller 1002 and the second screening roller 1003 rotate in opposite directions, and the large pieces of material are finally crushed here. At the same time, the gap between the rollers of the discharging screening and crushing roller system 10 can be adjusted within a certain range, so that the particle size of the discharging material can be adjusted. In terms of design, all rollers of the discharging screening and crushing roller system 10 can achieve reversal, and a roller speed monitoring device 13 is provided. When there is material jamming or other failures between the rollers, the rollers can be reversed or shut down to protect the equipment from damage.

Claims

1. A roller crushing station with adjustable particle size and terminal screening and crushing function, characterized in that: The invention comprises a frame (1), a feed hopper (2) and a discharge hopper (3) fixedly connected to the frame (1), a fixed crushing roller (4) and a movable crushing roller (5) located on the upper part of the frame (1), and a discharge screening crushing roller system (10) located on the lower part of the frame (1); the discharge screening crushing roller system (10) is located below the fixed crushing roller (4) and the movable crushing roller (5), and the discharge screening crushing roller system (10) comprises a plurality of screening rollers (1001) arranged in parallel, a first screening roller (100 2) and a second screening roller (1003), the first screening roller (1002) being located between the most downstream screening roller (1001) and the second screening roller (1003), when the discharging screening and crushing roller system (10) is in operation, the screening roller (1001) and the first screening roller (1002) rotate in the forward direction along the material flow direction, and the second screening roller (1003) rotates in the reverse direction along the material flow direction, and the rotation speed of the screening roller (1001) located downstream along the material flow direction gradually increases compared with the rotation speed of the upstream screening roller (1001).

2. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 1 is characterized in that: The fixed crushing roller (4) and the movable crushing roller (5) rotate in opposite directions and have a differential speed.

3. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 2 is characterized in that: The movable crushing roller (5) moves toward or away from the fixed position under the action of the hydraulic cylinder (501).

4. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 1, 2 or 3, characterized in that: The surfaces of the fixed crushing roller (4) and the movable crushing roller (5) are tooth-shaped, and the roller teeth of the fixed crushing roller (4) and the movable crushing roller (5) are staggered along the roller axis direction.

5. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 1 is characterized in that: The fixed crushing roller (4) is fixed on the frame (1), and the fixed crushing roller (4) is driven by a crushing roller driving device (6) fixed on the back side. The movable crushing roller (5) has a movable crushing roller driving device (7) fixed on the back side. The discharging screening crushing roller system (10) is driven by a discharging screening crushing roller system driving device (11).

6. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 5 is characterized in that: Each roller of the discharging screening and crushing roller system (10) has an independent driving system, and the rotation direction of the roller is reversible and the rotation speed is adjustable.

7. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 6 is characterized in that: A plurality of scraping devices (12) are provided below the discharging screening and crushing roller system (10), and a scraping device (12) is provided below each of the screening roller (1001), the first screening roller (1002), and the second screening roller (1003).

8. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 1, 2 or 3, characterized in that: The axis of the first screening roller (1002) is lower than the axis of the most downstream screening roller (1001) and the second screening roller (1003).

9. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 8 is characterized in that: A fixed crushing roller scraping device (8) is provided below the fixed crushing roller (4), and a movable crushing roller scraping device (9) is provided below the movable crushing roller (5).

10. The particle size adjustable roller crushing station with terminal screening and crushing function according to claim 1, characterized in that: The discharging screening and crushing roller system (10) is also provided with a speed monitoring device (13).

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