Improved coal gangue conveying and screening device

Abstract

The utility model discloses an improved coal gangue conveying and screening device which comprises a conveying rack, a conveying assembly is installed on the inner side of the conveying rack, a suspension screening mechanism is installed above the conveying assembly, the conveying assembly comprises a conveying belt, and the conveying belt is composed of a conveying section and a backflow section. A driving roller is installed on the inner side of the front end of the conveying belt, a rotating roller is installed on the inner side of the rear end of the conveying belt, an unloading roller and a guide roller are installed in the middle of the material conveying section, and the unloading roller is located above the guide roller. The suspension screening mechanism comprises a suspension support, connecting springs are fixedly installed at the four end corners of the suspension support, steel cables are fixedly installed at the bottom ends of the connecting springs, and a screening frame is fixedly installed at the bottom ends of the four steel cables. Unloading, screening and automatic falling are carried out while raw coal is conveyed, gangue can be screened conveniently, and the quality and conveying efficiency of the raw coal are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal gangue screening technical field, concretely is an improved coal gangue conveying and screening device. BACKGROUND

[0002] The original coal conveyor is the key equipment in the coal mining and subsequent processing process, and its core working principle is to drive the conveyor belt or chain to continuously run through the mechanical transmission device, thereby realizing the continuous conveying of coal and other materials. Specifically, with the power of the transmission drum, the conveyor belt is prompted to move in a loop, and the coal material is placed at the starting end of the conveyor belt and is stably and efficiently conveyed to the predetermined destination with the continuous movement of the conveyor belt. The original coal conveyor plays an important role in the process of coal mining, which can rapidly and continuously convey coal from the mining working face to the subsequent processing link, ensuring the smooth operation of the entire production process. Taking the belt conveyor as an example, it has become the main equipment for coal transportation in coal mines due to its excellent conveying capacity and significant advantage of adapting to long-distance conveying.

[0003] However, in the actual operation process of the existing belt conveyor, there is a problem to be solved. When the raw coal is conveyed by the belt conveyor, a certain amount of gangue is inevitably mixed in. The existence of these gangues not only adversely affects the overall quality of the raw coal, but also increases the difficulty of subsequent processing. In order to solve this problem, it is usually necessary to carry out gangue picking during the operation of the belt system. However, due to the high running speed of the conveyor belt, the gangue picking personnel can only pick out the surface gangue, and the deep gangue is difficult to be discovered and processed in time. More seriously, this gangue picking method poses a great threat to the safety of the gangue picking personnel, and is also not conducive to the rapid and accurate selection of gangue. Therefore, the existing belt conveyor cannot meet the actual demand in the aspect of gangue picking.

[0004] After in-depth research and repeated tests, an innovative improved coal gangue conveying and screening device is proposed. The device aims to optimize the conveying and screening mechanism, improve the efficiency of gangue picking, and reduce the safety risk of the gangue picking personnel, so as to better meet the actual needs in the process of coal production. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing an improved coal gangue conveying and screening device to solve the problem of mixing gangue in raw coal during the conveying process of the existing belt conveyor, which is not conducive to the rapid selection of gangue and affects the quality of raw coal.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: an improved coal gangue conveying and screening device, conveying frame is installed with conveying assembly in the inside of conveying frame, the upper side of conveying assembly is installed with suspension screening mechanism, conveying assembly includes conveying belt, conveying belt is composed of feed section and backflow section, the inside of conveying belt front end is installed with drive roller, the inside of conveying belt rear end is installed with gyration roller, the middle part of feed section is installed with unloading roller and guide roller, unloading roller is located in the upper side of guide roller,

[0007] Suspension screening mechanism includes hanging support, four end corners of hanging support are all fixedly installed with connecting spring, the bottom of connecting spring is fixedly installed with steel cable, the bottom of four steel cables is fixedly installed with one screening frame, the rear end of screening frame upper end surface is fixedly installed with guide bent plate, both sides of screening frame are rotatably connected with transmission connecting rod, the upper end of two transmission connecting rods is installed with one eccentric roller.

[0008] Preferably, the front end of conveying frame is fixedly installed with first transmission motor, conveying frame and feed section are slidably connected through a plurality of supporting rollers, the output end of first transmission motor penetrates conveying frame and is connected with drive roller through shaft coupling, the rotation direction of conveying belt is clockwise.

[0009] Preferably, the conveying assembly further includes two connecting rollers connected with the rear end of backflow section, one tensioning roller is installed below two connecting rollers, a counterweight frame is installed at the bottom of tensioning roller.

[0010] Preferably, the suspension screening mechanism further includes a mounting cross frame fixedly connected with the conveying frame, a gear transmission box is fixedly installed in the middle part of mounting cross frame, a second transmission motor is fixedly installed on one side of gear transmission box, a gear set is arranged in the inside of gear transmission box, the output end of second transmission motor penetrates gear transmission box and is drivingly connected with eccentric roller through gear set, the eccentric roller is eccentrically rotated relative to gear transmission box.

[0011] Preferably, both ends of two transmission connecting rods are rotatably connected with screening frame and eccentric roller, the front end of screening frame is located directly below unloading roller, a screen is arranged in the middle part of screening frame upper end surface, four end corners of hanging support are connected with four steel cables through connecting spring.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. This utility model uses a first drive motor to drive a conveyor belt, consisting of a conveying section and a return section, to rotate clockwise via a drive roller. The conveyor belt then sequentially passes through a rotary roller, a connecting roller, and a tension roller for guidance and transport. Raw coal is conveyed between the drive roller and the unloading roller via the conveying section and unloaded via the unloading roller. This design achieves automated raw coal conveying, eliminating the need for manual coal picking on a high-speed conveyor belt, thus avoiding the safety risks associated with manual coal picking and improving conveying efficiency.

[0014] 2. A screen is installed in the middle of the upper surface of the screening frame. The second drive motor drives the eccentric roller to rotate eccentrically through the gear set in the gear transmission box. The eccentric roller then drives the mounting frame to vibrate through two transmission connecting rods. The hanging bracket is connected to four steel cables by connecting springs, allowing the hanging bracket to elastically suspend the screening frame through the connecting springs and steel cables, thus facilitating the screening operation of the raw coal. This vibration screening mechanism enables the raw coal to be evenly distributed on the screen and uses the vibration of the screen to separate gangue from the raw coal, eliminating the need for manual sorting and greatly improving screening efficiency and accuracy.

[0015] 3. After screening, the raw coal falls onto the surface of the conveying section located between the guide rollers and the rotary rollers. Simultaneously, the screening frame, through the guide baffle, discharges any remaining gangue, preventing the raw coal from mixing with the gangue again. The conveying section stably transports the screened raw coal, and simultaneously unloading, screening, and automatic return facilitate gangue screening, ensuring the quality of the raw coal and conveying efficiency. This design achieves automatic separation and recovery of gangue and raw coal, eliminating the need for manual secondary processing and further improving production efficiency and safety.

[0016] In summary, this utility model effectively solves the problems of manual gangue picking through multiple processes, including power drive and belt operation, vibration screening mechanism, gangue discharge and raw coal recovery, improves the screening efficiency and accuracy of raw coal, and ensures the safety of gangue picking personnel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the entire utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the conveying component of this utility model;

[0020] Figure 4 This is a schematic diagram of the suspended screening mechanism of this utility model.

[0021] In the figure: 1, conveying frame; 2, first transmission motor; 3, suspension screening mechanism; 301, hanging support; 302, connecting spring; 303, steel cable; 304, screening frame; 305, material guiding bent plate; 306, transmission connecting rod; 307, eccentric roller; 308, gear transmission box; 309, second transmission motor; 310, mounting cross frame; 4, conveying assembly; 401, material conveying section; 402, backflow section; 403, drive roller; 404, unloading roller; 405, guide roller; 406, rotating roller; 407, connecting roller; 408, tensioning roller; 5, counterweight frame; 6, supporting roller. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] The first transmission motor 2 (model number GV50-3.7KW-60-S) and the second transmission motor 309 (model number KOM7080) mentioned in the utility model can be obtained from the market or private customization.

[0024] Please refer to Figure 1 and Figure 2 The utility model provides an embodiment: an improved coal gangue conveying and screening device, including conveying frame 1, the front end of conveying frame 1 is fixedly installed with first transmission motor 2, the inner side of conveying frame 1 is installed with conveying assembly 4, the upper of conveying assembly 4 is installed with suspension screening mechanism 3, and the raw coal is conveyed to suspension screening mechanism 3 by conveying assembly 4 to carry out screening and backfall, which is convenient for maintaining conveying efficiency.

[0025] Please refer to Figure 2 and Figure 3 Conveying assembly 4 includes conveying belt, the conveying belt is composed of material conveying section 401 and backflow section 402, the inner side of the front end of conveying belt is installed with drive roller 403, conveying frame 1 and material conveying section 401 are slidably connected through a plurality of supporting rollers 6, the output end of first transmission motor 2 penetrates conveying frame 1 and is connected with drive roller 403 through a shaft coupling, the rotation direction of conveying belt is clockwise, the inner side of the rear end of conveying belt is installed with rotating roller 406, the middle part of material conveying section 401 is installed with unloading roller 404 and guide roller 405, unloading roller 404 is located above guide roller 405, and the raw coal can be unloaded to suspension screening mechanism 3 through unloading roller 404 and guide roller 405.

[0026] Two connecting rollers 407 are installed at the rear end of the return section 402. A tensioning roller 408 is installed below the two connecting rollers 407. A counterweight frame 5 is installed at the bottom of the tensioning roller 408. Under the gravity of the counterweight frame 5, the tensioning roller 408 can automatically tighten the conveyor belt.

[0027] Please see Figure 2 and Figure 4 The suspended screening mechanism 3 includes a hanging bracket 301. Each of the four corners of the hanging bracket 301 is fixedly equipped with a connecting spring 302. A steel cable 303 is fixedly installed at the bottom of the connecting spring 302. A screening frame 304 is fixedly installed at the bottom of the four steel cables 303. A guide plate 305 is fixedly installed at the rear end of the upper surface of the screening frame 304. The front end of the screening frame 304 is located directly below the unloading roller 404. A screen is provided in the middle of the upper surface of the screening frame 304. The four corners of the hanging bracket 301 and the four steel cables 303 are all connected by the connecting spring 302, so that the hanging bracket 301 can elastically suspend the screening frame 304 through the connecting spring 302 and the steel cables 303, thereby facilitating the screening operation of the screening frame 304 on raw coal.

[0028] Both sides of the screening frame 304 are rotatably connected to transmission rods 306. An eccentric roller 307 is installed at the upper end of the two transmission rods 306. Both ends of the two transmission rods 306 are rotatably connected to the screening frame 304 and the eccentric roller 307. A mounting frame 310 is fixedly installed in the middle of the conveyor frame 1. A gear transmission box 308 is fixedly installed in the middle of the mounting frame 310. A second transmission motor 309 is fixedly installed on one side of the gear transmission box 308. A gear set is provided inside the gear transmission box 308. The output end of the second transmission motor 309 passes through the gear transmission box 308 and is connected to the eccentric roller 307 through the gear set. The eccentric roller 307 rotates eccentrically relative to the gear transmission box 308, so that the second transmission motor 309 drives the eccentric roller 307 to rotate through the gear set in the gear transmission box 308. In turn, the eccentric roller 307 drives the mounting frame 310 to vibrate through the two transmission rods 306.

[0029] In use, raw coal is placed at the front end of the conveying section 401, the power is turned on, and the first drive motor 2 is started. Under the support of the conveyor frame 1, the first drive motor 2 drives the conveyor belt composed of the conveying section 401 and the return section 402 to rotate clockwise through the drive roller 403. Then the conveyor belt is guided and conveyed in sequence through the rotary roller 406, the connecting roller 407 and the tension roller 408. Under the gravity of the counterweight frame 5, the tension roller 408 can automatically tighten the conveyor belt. The raw coal is conveyed between the drive roller 403 and the unloading roller 404 through the conveying section 401 and unloaded through the unloading roller 404.

[0030] The middle part of the upper end face of the screening frame 304 is provided with a screen mesh, the second transmission motor 309 is started, the second transmission motor 309 drives the eccentric roller 307 to eccentrically rotate under the support of the installation cross frame 310 through the gear set in the gear transmission box 308, and then the eccentric roller 307 drives the installation cross frame 310 to vibrate through the two transmission connecting rods 306, the hanging bracket 301 is connected with the four steel cables 303 through the connecting springs 302, so that the hanging bracket 301 can elastically suspend the screening frame 304 through the connecting springs 302 and the steel cables 303, and then the screening frame 304 can conveniently screen the raw coal;

[0031] At this time, the raw coal screened falls to the surface of the material conveying section 401 between the guide roller 405 and the rotary roller 406, and when the raw coal is transported to the main belt conveyor, it is mostly in the form of fine particles, and the gangue is solid and in the form of blocks, so that the raw coal screened by the vibrating screen falls on the main belt conveyor, and the upper part of the vibrating screen is mostly gangue and a small amount of coal blocks, at this time, the screening frame 304 can discharge the residual gangue through the guide material bending plate 305, so as to avoid the mixture of raw coal and gangue again, and a small amount of coal blocks is picked back to the lower main belt conveyor by artificial, and the raw coal screened can be stably conveyed through the material conveying section 401.

[0032] Improvement effect:

[0033] Economic effect: ①Each structure is improved on the basis of the existing, is self-made, does not need to purchase equipment, saves purchase investment, and effectively utilizes the space of the belt conveyor corridor. The total investment material accessory cost is about 60,000 yuan, but saves 300,000 yuan of purchase, and is ingenious and practical, reduces the machine room facility investment of about 200,000 yuan.

[0034] ②Reduces labor intensity and human investment, and improves coal quality. For example, the original transportation line gangue picking personnel is 16 people per shift, and after the transformation, only 3 people per shift can complete the gangue picking, and the annual labor cost is saved by more than 100,000 yuan. After the transformation, the raw coal quality is obviously improved, the ash content is reduced, and 600,000 yuan of benefits can be created. The two items are cumulative, and more than 120,000 yuan of benefits can be created per year.

[0035] Safety benefit: In the normal operation of the belt system, only the surface gangue can be picked out due to the fast speed of the conveying belt, and the safety of the gangue picking personnel is greatly threatened. After the system transformation, better coal and gangue sorting effect can be obtained, and the safety of the personnel is also guaranteed.

[0036] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. An improved coal gangue conveying and screening device, comprising a conveying frame (1), characterized in that: The inner side of the conveying frame (1) is provided with a conveying assembly (4), the upper side of the conveying assembly (4) is provided with a suspension screening mechanism (3), the conveying assembly (4) comprises a conveying belt which is composed of a feeding section (401) and a return section (402), the inner side of the front end of the conveying belt is provided with a driving roller (403), the inner side of the rear end of the conveying belt is provided with a rotating roller (406), the middle part of the feeding section (401) is provided with an unloading roller (404) and a guide roller (405), the unloading roller (404) is located above the guide roller (405); The suspension screening mechanism (3) comprises a hanging support (301), the four end corners of the hanging support (301) are fixedly provided with connecting springs (302), the bottom end of the connecting spring (302) is fixedly provided with a steel cable (303), the bottom end of the four steel cables (303) is fixedly provided with a screening frame (304), the rear end of the upper end surface of the screening frame (304) is fixedly provided with a guide bending plate (305), the two sides of the screening frame (304) are rotatably connected with transmission connecting rods (306), the upper end of the two transmission connecting rods (306) is provided with an eccentric roller (307).

2. The improved coal gangue conveying and screening device according to claim 1, characterized in that: The front end of the conveying frame (1) is fixedly provided with a first transmission motor (2), the conveying frame (1) and the feeding section (401) are slidably connected through a plurality of supporting rollers (6), the output end of the first transmission motor (2) penetrates the conveying frame (1) and is connected with the driving roller (403) through a shaft coupling, and the rotation direction of the conveying belt is clockwise.

3. The improved coal gangue conveying and screening device according to claim 1, characterized in that: The conveying assembly (4) further comprises two connecting rollers (407) connected with the rear end of the return section (402), a tensioning roller (408) is arranged below the two connecting rollers (407), and the bottom end of the tensioning roller (408) is provided with a counterweight frame (5).

4. The improved coal gangue conveying and screening device according to claim 1, characterized in that: The suspension screening mechanism (3) further comprises a mounting cross frame (310) fixedly connected with the conveying frame (1), the middle part of the mounting cross frame (310) is fixedly provided with a gear transmission box (308), one side of the gear transmission box (308) is fixedly provided with a second transmission motor (309), the inner side of the gear transmission box (308) is provided with a gear set, the output end of the second transmission motor (309) penetrates the gear transmission box (308) and is drivingly connected with the eccentric roller (307) through the gear set, and the eccentric roller (307) rotates eccentrically relative to the gear transmission box (308).

5. The improved coal gangue conveying and screening device according to claim 1, characterized in that: The two ends of the two transmission connecting rods (306) are rotatably connected with the screening frame (304) and the eccentric roller (307), the front end of the screening frame (304) is located directly below the unloading roller (404), the middle part of the upper end surface of the screening frame (304) is provided with a screen, and the four end corners of the hanging support (301) are connected with the four steel cables (303) through the connecting springs (302).

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