Coal gangue crushing and screening integrated device

Abstract

The utility model discloses a kind of coal gangue crushing screening integrated equipment, belong to coal gangue processing technical field, the crushing screening integrated equipment includes sieve cylinder and support, sieve cylinder is built-in spiral body, and spiral body is concentric with sieve cylinder, the upper surface rear end of sieve cylinder is provided with receiving hopper, and receiving hopper is built-in crushing roller, sieve cylinder is uniformly distributed with a section of sieve hole, and spiral body is fixedly connected with first grinding sleeve in the position of sieve hole opposite, spiral body is fixedly connected with second grinding sleeve on the end of sieve cylinder close, receiving dish is fixedly installed in the lower end of support and located directly below sieve cylinder, sieve cylinder is covered with arc-shaped sealing cover, and sealing cover is fixedly connected with receiving dish by bolt.

Description

Technical Field

[0001] This utility model belongs to the field of coal gangue processing technology, specifically relating to an integrated equipment for crushing and screening coal gangue. Background Technology

[0002] Currently, coal gangue processing often adopts a separate crushing and screening equipment model, requiring the material to go through two processes in a transfer link. This not only increases the equipment footprint and operating costs, but also reduces processing efficiency due to material loss during the transfer process. Even some integrated equipment often faces the problem of insufficient coordination between screening and grinding: the particle size of the crushed material is uneven, a single grinding is difficult to meet the subsequent utilization needs, and the screen holes are easily blocked by particles, resulting in a decrease in sorting efficiency.

[0003] Meanwhile, traditional equipment generally lacks effective sealing structures, and the large amount of dust generated during coal gangue crushing and grinding pollutes the working environment, threatening the health of operators and falling short of increasingly stringent environmental protection requirements. In addition, the grinding gap of existing equipment is mostly fixed in design, and cannot be flexibly adjusted according to the hardness differences of coal gangue and the target particle size requirements, thus limiting its applicability and making it difficult to meet the utilization requirements of different scenarios such as roadbed filling and building material production.

[0004] Therefore, developing a coal gangue processing equipment that integrates high-efficiency crushing, grading and grinding, and precise screening, and has the characteristics of being sealed, environmentally friendly, and having adjustable gaps, has become an urgent need to solve current technical pain points and improve the comprehensive utilization level of coal gangue. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] An integrated crushing and screening device for coal gangue includes a screen cylinder with a built-in spiral body concentric with it. A receiving hopper is located at the rear end of the upper surface of the screen cylinder, and a crushing roller is built into the receiving hopper. A section of screen holes is evenly distributed on the screen cylinder. A first grinding sleeve is fixedly connected to the spiral body at a position directly opposite the screen holes, and a second grinding sleeve is fixedly connected to the spiral body near the end of the screen cylinder. Coal gangue enters the receiving hopper and is crushed by the crushing roller. The crushed coal gangue falls into the screen cylinder and is conveyed forward by the spiral body. During the conveying process, it is subjected to secondary grinding by the first grinding sleeve. During this process, the powder is separated through the screen holes, and the remaining coal gangue continues to move forward and is ground again by the second grinding sleeve before being discharged from the tail end of the screen cylinder.

[0008] Preferably, one end of the spiral is connected to a drive shaft, the end of the drive shaft is connected to a gearbox, the input end of the gearbox is connected to a pulley, and a belt is fitted onto the pulley; the other end of the belt is connected to a first driver.

[0009] Preferably, a positioning cylinder is inserted into the end of the screen cylinder, the positioning cylinder is concentric with the screen cylinder and there is a gap between them, the end of the spiral body is provided with a short shaft, and the short shaft extends outward through the positioning cylinder, and a bearing is provided between the short shaft and the positioning cylinder for support.

[0010] Preferably, the end of the short shaft is threaded, and an adjusting rudder is threadedly connected to the rotating shaft. The front end of the adjusting rudder is rotatably connected to the end of the positioning cylinder by means of a bearing.

[0011] Preferably, the integrated device also includes a support frame, and the screen cylinder is placed on the support frame. A baffle is provided at the end of the support frame, the positioning cylinder is fixed on the baffle, and the short shaft and the adjusting rudder are located outside the baffle.

[0012] Preferably, a receiving dish is fixedly installed at the lower end of the support and directly below the screen cylinder. The bottom surface of the receiving dish is curved, and a discharge port is provided at the lowest point of the bottom of the receiving dish. An arc-shaped sealing cover is covered on the top of the screen cylinder, and the sealing cover is fixedly connected to the receiving dish by bolts. The sealing cover and the receiving dish form a cylindrical structure, and the diameter of the screen cylinder is smaller than the diameter of the cylinder formed by the sealing cover and the receiving dish.

[0013] Preferably, one end of the crushing roller is provided with a connecting shaft that passes through the side of the receiving hopper, a pulley is fixedly sleeved on the connecting shaft, and a belt is sleeved on the pulley. The other end of the belt is connected to a second driver.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) In this utility model, the initial crushing is achieved by the crushing roller in the receiving hopper, the secondary grinding and synchronous screening are achieved by the first grinding sleeve in the screen cylinder, and the third grinding is achieved by the second grinding sleeve. This integrates multiple processes into a single piece of equipment, greatly shortens the processing flow, and reduces the equipment footprint and transportation costs.

[0016] (2) In the process of conveying the spiral body in this utility model, the first grinding sleeve is aligned with the screen hole of the screen cylinder to ensure that the ground powder can be separated through the screen hole in time and avoid "over-grinding"; the curved bottom receiving dish can quickly collect the powder under the screen, and the bottom discharge port design further improves the material collection efficiency.

[0017] (3) In this utility model, the gap between the positioning cylinder and the screen cylinder can be finely adjusted by adjusting the rudder to adapt to the grinding requirements of coal gangue of different particle sizes; the closed structure composed of the sealing cover and the receiving dish can reduce dust overflow, while the bearing connection between the short shaft and the positioning cylinder and the stable support of the bracket ensure long-term stable operation of the equipment. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the integrated crushing and screening equipment of this utility model.

[0019] Figure 2 This is a front view of the integrated crushing and screening equipment of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the integrated crushing and screening equipment of this utility model.

[0021] Figure 4 This is a front cross-sectional view of the integrated crushing and screening equipment of this utility model.

[0022] Figure 5 This is a structural diagram of the grinding and screening mechanism of the integrated crushing and screening equipment of this utility model.

[0023] Figure 6 This is a split view of the grinding and screening mechanism of the integrated crushing and screening equipment of this utility model.

[0024] Figure 7 This is a cross-sectional view of the grinding and screening mechanism of the integrated crushing and screening equipment of this utility model.

[0025] The correspondence between the labels and component names in the attached figures is as follows:

[0026] 101. Screen cylinder; 102. Spiral body; 1021. First grinding sleeve; 1022. Second grinding sleeve; 1023. Drive shaft; 103. Gearbox; 1031. First driver; 104. Positioning cylinder; 1041. Adjusting rudder; 105. Sealing cover; 106. Receiving dish;

[0027] 201, receiving hopper; 2011, crushing roller; 202, second drive. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0031] This integrated coal gangue crushing and screening equipment is designed with efficient and coordinated processing as its core objective. Through a modular structural layout, it achieves integrated operation of the entire process, including crushing, conveying, grading, grinding, and screening. Specific implementation details are as follows:

[0032] See Figure 1 and Figure 2This is a structural diagram of the integrated coal gangue crushing and screening equipment in this embodiment. The main frame of the equipment is composed of a support frame. The platform in the middle of the support frame supports the screen cylinder 101. The screen cylinder 101 is made of wear-resistant alloy steel with uniform wall thickness and good impact resistance, which can effectively cope with the friction and impact during the crushing process of coal gangue. A spiral body 102 is coaxially arranged inside the screen cylinder 101. The blades of the spiral body 102 adopt a gradually decreasing pitch design, with the pitch gradually decreasing from the rear end to the front end of the screen cylinder 101. This ensures that the coal gangue obtains a stable propulsive force during the conveying process and gradually increases the extrusion strength of the material through the change in pitch, laying the foundation for the subsequent grinding process. At the rear end of the upper surface of the screen cylinder 101, a receiving hopper 201 is fixedly installed by bolts. The receiving hopper 201 has an inverted trapezoidal structure, and the inner wall is lined with wear-resistant ceramic. The liner reduces wear caused by material impact. Inside the receiving hopper 201, a pair of intermeshing crushing rollers 2011 are horizontally arranged. The surface of the crushing rollers 2011 is evenly distributed with serrated protrusions. The gap between the two rollers can be pre-adjusted according to the initial particle size of the coal gangue to ensure that large pieces of coal gangue can be quickly sheared, squeezed and crushed to the preset particle size after entering. The power of the crushing rollers 2011 is provided by an independent second driver 202. Specifically, one end of the crushing rollers 2011 extends into a connecting shaft that passes through the side of the receiving hopper 201. A pulley is fixedly sleeved at the end of the connecting shaft. The pulley is connected to the pulley at the output end of the second driver 202 through a V-belt. The second driver 202 is a variable frequency motor, which can control the crushing efficiency of the crushing rollers 2011 by adjusting the speed to adapt to the processing needs of coal gangue of different hardness.

[0033] See Figure 3 and Figure 4 In this embodiment, a section of screen holes is uniformly opened on the wall of the screen cylinder 101, corresponding to the middle area of ​​the spiral body 102. The screen hole diameter is set according to the target screening particle size, and the edges of the screen holes are chamfered to avoid material jamming. A first grinding sleeve 1021 is fixedly connected to the outer side of the spiral body 102 blades opposite to the screen holes by welding. The first grinding sleeve 1021 is made of high-hardness alloy material, and its outer circumferential surface is provided with fine grinding texture. When the spiral body 102 drives the first grinding sleeve 1021 to rotate, the first grinding sleeve 1021 forms a small grinding gap with the inner wall of the screen cylinder 101. The crushed coal gangue is conveyed by the spiral. Under the action of force, the material passes through the gap and is further ground and refined. Powdered material that meets the particle size requirements falls directly through the sieve holes to achieve preliminary screening. At the end of the spiral body 102 near the sieve cylinder 101, a second grinding sleeve 1022 is also fixedly connected. The grinding pattern density of the second grinding sleeve 1022 is greater than that of the first grinding sleeve 1021, and the gap between it and the inner wall of the sieve cylinder 101 is smaller than that of the first grinding sleeve 1021. The coarse particles that do not pass the first grinding screening continue to be conveyed forward and are deeply ground by the second grinding sleeve 1022 to ensure that the particle size of the finally discharged material is uniform and meets the basic requirements for subsequent resource utilization.

[0034] See Figure 5 In this embodiment, the power transmission system of the spiral 102 is independently set. One end of the spiral 102 is connected to the drive shaft 1023 via a coupling. The end of the drive shaft 1023 extends into the gearbox 103 and meshes with the output shaft gear of the gearbox 103. The gearbox 103 adopts a multi-stage gear transmission structure, which can flexibly adjust the speed of the spiral 102 according to the material processing volume. The input end of the gearbox 103 is also connected to a pulley, which is connected to the first driver 1031 via a belt. The first driver 1031 is a high-torque motor, which provides sufficient power for the stable rotation of the spiral 102. To achieve flexible adjustment of the grinding gap, a positioning cylinder 104 is movably inserted into the end of the screen cylinder 101. The positioning cylinder 104 and the screen cylinder 101 are concentrically arranged, and an adjustable movable gap is reserved between them. The end of the spiral 102 is integral. The frame has a short shaft that extends through the positioning cylinder 104 to the outside of the screen cylinder 101. The short shaft and the positioning cylinder 104 are supported by a deep groove ball bearing to ensure the stability of the short shaft during rotation. The outer circumferential surface of the end of the short shaft is engraved with an external thread, and the threaded connection is to an adjusting rudder 1041. The front end of the adjusting rudder 1041 is rotatably connected to the end of the positioning cylinder 104 through a thrust bearing. At the same time, a vertical baffle is welded to the end of the bracket. The positioning cylinder 104 is fixed to the center of the baffle by bolts. The short shaft and the adjusting rudder 1041 are both located outside the baffle. When it is necessary to adjust the grinding gap, simply rotate the adjusting rudder 1041. Under the action of the threaded transmission, the short shaft drives the spiral body 102 to move back and forth along the axial direction, thereby changing the gap between the first grinding sleeve 1021, the second grinding sleeve 1022 and the inner wall of the screen cylinder 101. The operation is convenient and the adjustment accuracy is high.

[0035] See Figure 6-7 To address dust pollution during operation, this embodiment also includes a sealing and receiving structure: A receiving dish 106 is bolted to the lower end of the support frame, directly below the sieve cylinder 101. The inner bottom of the receiving dish 106 is designed as a curved surface, lower in the middle and higher on both sides. An outlet is located at the lowest point of the bottom of the receiving dish 106, allowing for rapid collection of powdered material falling from the sieve holes. An arc-shaped sealing cover 105, made of transparent, wear-resistant plastic, covers the top of the sieve cylinder 101, facilitating operator observation of the internal operation. The two sides of the sealing cover 105 are bolted to the upper edge of the receiving dish 106, forming a complete cylindrical sealed space. The inner diameter of this cylinder is larger than the diameter of the sieve cylinder 101, providing sufficient space for material to fall, effectively preventing dust spillage during grinding and screening, and protecting the working environment and operator health.

[0036] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An integrated crushing and screening device for coal gangue, comprising a screen cylinder (101), wherein the screen cylinder (101) has a built-in spiral body (102) and the spiral body (102) is concentric with the screen cylinder (101), and a receiving hopper (201) is provided at the rear end of the upper surface of the screen cylinder (101), and the receiving hopper (201) has a built-in crushing roller (2011), characterized in that: The screen cylinder (101) has a section of screen holes evenly distributed on it, and a first grinding sleeve (1021) is fixedly connected to the spiral body (102) at a position directly opposite to the screen holes. A second grinding sleeve (1022) is fixedly connected to the spiral body (102) near the end of the screen cylinder (101). Coal gangue enters the receiving hopper (201) and is crushed by the crushing roller (2011). The crushed coal gangue falls into the screen cylinder (101) and is conveyed forward by the spiral body (102). During the conveying process, the first grinding sleeve (1021) is used for secondary grinding. During this process, the powder is separated through the screen holes. The remaining coal gangue continues to move forward and is ground again by the second grinding sleeve (1022) before being discharged from the tail of the screen cylinder (101).

2. The integrated coal gangue crushing and screening equipment according to claim 1, characterized in that: One end of the spiral (102) is connected to a drive shaft (1023), the end of the drive shaft (1023) is connected to a gearbox (103), the input end of the gearbox (103) is connected to a pulley, and a belt is sleeved on the pulley. The other end of the belt is connected to a first driver (1031).

3. The integrated coal gangue crushing and screening equipment according to claim 1, characterized in that: The end of the screen cylinder (101) is connected to a positioning cylinder (104). The positioning cylinder (104) and the screen cylinder (101) are concentric and there is a gap between them. The end of the spiral body (102) is provided with a short shaft, which extends outward through the positioning cylinder (104). A bearing is provided between the short shaft and the positioning cylinder (104) for support.

4. The integrated coal gangue crushing and screening equipment according to claim 3, characterized in that: The short shaft has a threaded end, and an adjusting rudder (1041) is threadedly connected to the shaft. The front end of the adjusting rudder (1041) is rotatably connected to the end of the positioning cylinder (104) by means of a bearing.

5. The integrated coal gangue crushing and screening equipment according to claim 4, characterized in that: It also includes a support, and the screen cylinder (101) is placed on the support. The end of the support is provided with a baffle, the positioning cylinder (104) is fixed on the baffle, and the short shaft and the adjusting rudder (1041) are located outside the baffle.

6. The integrated coal gangue crushing and screening equipment according to claim 5, characterized in that: A receiving dish (106) is fixedly installed at the lower end of the support and directly below the screen cylinder (101). The bottom surface of the receiving dish (106) is curved, and a discharge port is provided at the lowest point of the bottom of the receiving dish (106). An arc-shaped sealing cover (105) is covered directly above the screen cylinder (101), and the sealing cover (105) is fixedly connected to the receiving dish (106) by bolts. The sealing cover (105) and the receiving dish (106) form a cylindrical structure, and the diameter of the screen cylinder (101) is smaller than the diameter of the cylinder formed by the sealing cover (105) and the receiving dish (106).

7. The integrated coal gangue crushing and screening equipment according to claim 1, characterized in that: The crushing roller (2011) has a connecting shaft that passes through the side of the receiving hopper (201) at one end. A pulley is fixedly sleeved on the connecting shaft, and a belt is sleeved on the pulley. The other end of the belt is connected to a second driver (202).

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