Efficient fixed separating screen for heavy medium pre-removal

Abstract

A heavy medium pre-separation efficient fixed separating screen comprises a control assembly, a magnetic separation and flow guide integrated assembly and a supporting frame and is characterized in that a cavity with an opening in the upper end is formed in a frame body of the supporting frame, a fixing plate is fixed to a ground fixing piece through bolts, and the control assembly is of an integrated structure and can control the magnetic separation and flow guide integrated assembly according to real-time data of materials. A flow guide groove of the magnetic separation and flow guide integrated assembly is of a downwards-inclined trapezoidal structure with the front portion wide and the rear portion narrow, a magnetic separation roller is arranged above the flow guide groove, a medium recycling groove is formed below the magnetic separation roller, and a U-shaped scraper is arranged in a discharging area of the magnetic separation roller. A sieve plate I and a sieve plate II which are respectively supported by a sieve frame I and a sieve frame II and incline downwards are arranged in the cavity, the upper layer is provided with slot-shaped sieve holes, and the lower layer is provided with circular sieve holes, so that the problems that an integrated control assembly, a magnetic separation and flow guide integrated assembly, a high-voltage pulse cleaning assembly and the like cannot be used are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal washing processing technical field especially, relates to a heavy medium pre -removal efficient fixed separation screen. BACKGROUND

[0002] In the field of coal washing processing, fixed screen is the key equipment for material classification, which is arranged by inclined screen plate, material is inclined to high end, and under the action of material gravity, material is slid along the screen surface, material larger than screen hole is left on the screen surface to form oversize material, and material smaller than screen hole passes through the screen surface to form undersize material, so as to achieve classification and separation, fixed screen is widely used in coal separation scene because of simple structure, firmness, no power and other advantages. However, the fixed screen of prior art cannot use integrated design control assembly, cannot automatically adjust washing intensity according to real-time data of cavity pressure and material flow, cannot automatically clean screen clogging according to whether screen vibration is abnormal, cannot use magnetic separation and flow guide integrated assembly, cannot realize rapid collection and recycling of magnetic heavy medium, reduce subsequent medium removal equipment load, cannot effectively save cost, improve overall coal washing efficiency, cannot use high-pressure pulse cleaning assembly, cannot clean screen regularly, guarantee the continuity of work, cannot automatically clean screen after determining screen clogging, guarantee the efficiency of work.

[0003] The invention patent with patent number ZL202110743230.7 discloses a "fixed screen for pre-removal of medium and dehydration in coal preparation plant", which comprises an oversize chute, a screen box structure, a connecting seat, an undersize chute and a dustproof device. The screen box structure is inclined to the horizontal plane, the top of the screen box structure is provided with a feed inlet, the oversize chute is fixedly connected with the bottom end of the screen box structure, the bottom of the screen box structure is fixedly connected with a screen surface support, the top of the screen surface support is communicated with the cavity of the screen box structure, the bottom of the screen surface support is provided with a discharge port, the screen surface support is parallel to the screen box structure, and the screen surface support and the discharge port form the undersize chute. Through reasonable structure design, the scouring force of material flow on the screen plate is small, the screen plate is slow to wear and has long service life, and the screening efficiency is stable; the screen plate structure is simple, easy to assemble and maintain, and the maintenance cost is low; the dustproof device is easy to disassemble and assemble, the dustproof effect of the equipment is good, and the environmental protection requirement is met.

[0004] The utility model discloses a patent No. ZL202322620035.2 invention patent discloses a kind of "vibrating screen plate and vibrating fixed screen", the utility model includes at least one screen, at least one vibrating motor is provided with each screen back side, the side wall of the screen is provided with frame, the frame outside is covered with shock-absorbing edge, for isolating the influence of vibration to screen body;The vibrating motor is electrically connected control system, the frequency of the vibrating motor is controlled by the control system.The utility model has the beneficial effects that by applying this kind of vibrating screen plate to fixed screen, the application range of fixed screen is improved, the processing efficiency is increased, the processing capacity of fixed screen is improved, and the load of the next process is reduced.The setting of vibrating motor also improves the self-cleaning ability of screen, and the style of screen surface can be adjusted according to the form of on-site material to adapt to different materials. SUMMARY

[0005] To solve the above technical problems, the utility model provides a kind of coal washing chute based on multiple coal quality cleaning switching, is provided with control component, magnetic separation flow guide integrated component, high pressure pulse cleaning component, high pressure flushing component, screen I, screen II and support frame etc., it is achieved according to the real-time data of pressure and material flow in cavity, automatic regulation flushing intensity, according to whether screen vibration is abnormal, automatic cleaning screen blockage, the rapid collection and recycling of magnetic heavy medium, reduce subsequent medium removal equipment load, effectively save cost, improve overall coal washing efficiency, screen is cleaned regularly, ensure the continuity of work, screen is cleaned automatically after determining screen blockage, ensure the efficiency of work, effectively solve the above technical problems.

[0006] To achieve the above object, the technical scheme adopted by the utility model to solve its technical problems is:

[0007] The heavy medium pre-drawing efficient fixed separation screen, including control component, magnetic separation flow guide integrated component and support frame, characterized in that,

[0008] The support frame includes a frame body, legs and a fixed plate, the frame body is set as a square structure, the legs are arranged at the four corner positions of the bottom of the frame body, the lower end of the leg is provided with a fixed plate, a through hole I is formed at the four corner positions of the fixed plate, and the fixed plate and the ground are fixed by bolts to achieve the purpose of stabilizing the support frame, the cavity with an open upper end is fixedly arranged in the frame body, and the size of the cavity matches the internal space of the frame body.

[0009] The control assembly includes a distribution box controller, a flow meter, a pressure analysis module, a vibration analysis module, a processor and a liquid crystal touch screen, is arranged in a module integrated structure, and the flow meter, the pressure analysis module, the vibration analysis module, the processor and the liquid crystal touch screen are arranged in the distribution box controller, so that the control assembly can automatically adjust the material flushing intensity and automatically clean the screen blockage according to the real-time data of the material in the cavity.

[0010] The magnetic separation and flow guide integrated assembly includes a flow guide groove, a magnetic separation roller and a driving motor, the flow guide groove is arranged at the bottom of the cavity, the flow guide groove is arranged in a trapezoidal structure with a front width and a rear narrowness, the flow guide groove is inclined downward from front to rear, and the included angle with the ground is 8°, the rear end of the flow guide groove is provided with an outlet I, the magnetic separation roller is arranged at the upper end of the flow guide groove, the rotating shafts at the two ends of the magnetic separation roller are rotatably supported by bearing seats, the central axis of the magnetic separation roller and the center line of the flow guide groove are parallel to each other and located on the same vertical plane, a gear is arranged on the rotating shaft at one end of the magnetic separation roller, the gear is engaged with the gear of the output shaft of the driving motor, the driving motor is connected with the distribution box controller through wires, a medium recovery groove is arranged at the preset position of the lower end of the magnetic separation roller, a U-shaped scraper is arranged in the non-magnetic material area of the magnetic separation roller, the length of the U-shaped scraper is equal to the length of the magnetic separation roller, the U-shaped scraper is made of non-magnetic material, and the U-shaped scraper is used to scrape off the magnetic material and guide the magnetic material to the medium recovery groove.

[0011] The upper end of the cavity is provided with four screen frames I, the lower end of the screen frame I is provided with a screen frame II at a preset position, the lower end of the cavity is arranged in an inverted conical structure, the tail of the cavity is provided with a medium discharge port, the rear end of the medium discharge port is communicated with the front end of the flow guide groove, and the width of the rear end of the medium discharge port is equal to the width of the front end of the flow guide groove.

[0012] The upper end of the screen frame I is provided with a screen plate I, the screen plate I includes a frame I and a screen I, the outer edge of the screen I is provided with the frame I, the shape and size of the frame I are matched with the shape and size of the screen frame I, a preset number of through holes II are symmetrically arranged at the corresponding preset positions of the frame I and the screen frame I, and the frame I and the screen frame I are fixed by bolts.

[0013] The upper end of the screen frame II is provided with a screen plate II, the screen plate II comprises a frame body II and a screen mesh II, the outer edge of the screen mesh II is provided with the frame body II, the shape and size of the frame body II match the shape and size of the screen frame II, a preset number of through holes III are symmetrically arranged in the corresponding positions of the frame body II and the screen frame II, the frame body II is fixed with the screen frame II through bolts, the screen plate II is inclined downward from front to back, and the included angle between the screen plate II and the ground is 30 degrees, and the inclination angle of the screen frame II matches the inclination angle of the screen plate II.

[0014] The screen mesh I and the screen mesh II are provided with horizontally arranged screen hole units, the screen hole units are arranged in a preset number, and two adjacent screen hole units are arranged in a staggered arrangement structure, the screen mesh I is provided with a strip-shaped screen hole, the length of the strip-shaped screen hole is 15 mm, and the width of the strip-shaped screen hole is 0.5 mm, and the screen mesh II is provided with a circular screen hole, and the diameter of the circular screen hole is 0.3 mm.

[0015] The center position of the rear end of the screen plate I is provided with an outlet II, the outlet II is connected with the screen plate I through a guide plate inclined from both ends to the middle, the center position of the rear end of the screen plate II is provided with an outlet III, and the outlet III is connected with the screen plate II through a guide plate inclined from both ends to the middle.

[0016] The high-pressure pulse cleaning assembly comprises a gas pipe, a high-pressure nozzle, a gas pipe rack, a compressor and a vibration sensor, the gas pipe is arranged in a serpentine coil structure, a preset number of high-pressure nozzles are sequentially arranged on the gas pipe, the gas pipe is arranged at the bottom of the screen mesh I and the screen mesh II, the opening direction of the high-pressure nozzle at the bottom of the screen mesh I is arranged to face the screen mesh I, the opening direction of the high-pressure nozzle at the bottom of the screen mesh II is arranged to face the screen mesh II, the arrangement position and the number of the high-pressure nozzles can cover the entire screen surface, the gas pipe is fixedly connected with the frame body through the gas pipe rack, the front end of the gas pipe is connected with the gas supply port of the compressor through a pipeline, the vibration sensor is arranged at the preset position of the screen mesh I and the screen mesh II, the vibration sensor and the compressor are connected with the distribution box controller through wires respectively, the high-pressure nozzle releases pulse airflow to blow through the screen hole through the instantaneous release of compressed gas, so as to clean the screen hole.

[0017] The high-pressure flushing assembly comprises a liquid pipe, a nozzle, a liquid pipe support, a circulating pump, a flow sensor and a pressure sensor, the liquid pipe is arranged in a serpentine coil structure, the liquid pipe is arranged at the upper end of the screen I, the liquid pipe is sequentially provided with a preset number of nozzles, the opening direction of the nozzle is arranged to face the direction of the screen I, the liquid pipe is fixedly connected with the frame body through the liquid pipe support, the front end of the liquid pipe is connected with the liquid inlet of the circulating pump through a pipeline, and the flow sensor and the pressure sensor are arranged at preset positions in the cavity.

[0018] The middle position of the front end of the screen I is provided with a feeding port, the feeding port is arranged in a trapezoidal structure with a narrow front end and a wide rear end, the width of the rear end of the feeding port is equal to the width of the screen I, and the feeding port is longitudinally symmetrically provided with a preset number of flow distribution plates.

[0019] The inner side wall of the flow guide groove and the outer surface of the magnetic separation roller are both provided with wear-resistant lining plates made of ceramic material, the screen plate I and the screen plate II are arranged in an integrated structure, and the screen plate I and the screen plate II are both made of polyurethane material.

[0020] The utility model discloses the beneficial effect is:

[0021] The utility model discloses the control component is arranged, with corresponding high pressure pulse cleaning assembly, high pressure flushing assembly, screen plate I and screen plate II etc., can reach according to the pressure and the flow real -time data of material in the cavity, automatic regulation washing intensity, according to whether the abnormality of screen vibration, automatic cleaning screen block, effectively solved the problem that cannot use integrated design's control component, cannot according to the pressure and the flow real -time data of material in the cavity, automatic regulation washing intensity, cannot according to whether the abnormality of screen vibration, automatic cleaning screen block.

[0022] The utility model discloses the magnetic separation flow guide integrated assembly is arranged, with corresponding bearing seat, medium recovery groove and U -shaped scraper etc., can reach the quick collection and recycling of magnetic heavy medium, reduce the follow -up demedium equipment load, effectively save the cost, promote the whole coal -washing efficiency, effectively solved the problem that cannot use magnetic separation flow guide integrated assembly, cannot reach the quick collection and recycling of magnetic heavy medium, reduce the follow -up demedium equipment load, cannot effectively save the cost, promote the whole coal -washing efficiency.

[0023] This utility model is equipped with a high-pressure pulse cleaning component, as well as corresponding control components, screen I and screen II, etc., which can clean the screen at regular intervals to ensure the continuity of work, and automatically clean the screen after it is determined to be clogged to ensure the efficiency of work. It effectively solves the problems that cannot be solved by using a high-pressure pulse cleaning component, cannot clean the screen at regular intervals to ensure the continuity of work, and cannot automatically clean the screen after it is determined to be clogged to ensure the efficiency of work. Attached Figure Description

[0024] Appendix Figure 1 This is a front view structural diagram of the present invention;

[0025] Appendix Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0026] Appendix Figure 3 This is a schematic diagram of the high-voltage pulse cleaning component of this utility model.

[0027] Legend:

[0028] 1. Control component, 2. Integrated magnetic separation and flow guiding component, 3. Support frame, 4. Frame body, 5. Support leg, 6. Fixing plate, 7. Through hole I, 8. Cavity, 9. Distribution box controller, 10. Flow meter, 11. Pressure analysis module, 12. Vibration analysis module, 13. Processor, 14. LCD touch screen, 15. Flow guide channel, 16. Magnetic separation roller, 17. Drive motor, 18. Outlet I, 19. Bearing seat, 20. Medium recovery tank, 21. U-shaped scraper, 22. Screen frame I, 23. Screen plate I, 24. Frame I, 25. Screen mesh I, 26. Slit-shaped screen hole, 27. Through hole II 28. Screen frame II, 29. Screen plate II, 30. Frame II, 31. Screen mesh II, 32. Circular screen hole, 33. Through hole III, 34. Discharge port, 35. Screen hole unit, 36. Outlet II, 37. Guide plate, 38. Outlet III, 39. High-pressure pulse cleaning assembly, 40. Gas pipe, 41. High-pressure nozzle, 42. Gas pipe rack, 43. Compressor, 44. Vibration sensor, 45. High-pressure flushing assembly, 46. Liquid pipe, 47. Nozzle, 48. Liquid pipe rack, 49. Circulation pump, 50. Flow sensor, 51. Pressure sensor, 52. Inlet, 53. Diverter plate. Detailed Implementation

[0029] Combination Figure 1 , Figure 2 , Figure 3 The present invention will be further described in detail with reference to the embodiments, so that the public can better understand the implementation method of the present invention. The specific implementation method of the present invention is as follows:

[0030] The heavy medium pre-dedicated high-efficiency fixed sorting screen comprises a control assembly 1, a magnetic separation flow guide integrated assembly 2 and a support frame 3, characterized in that

[0031] The support frame 3 comprises a frame body 4, a supporting leg 5 and a fixing plate 6, the frame body 4 is provided in a square structure, the supporting leg 5 is arranged at four corner positions of the bottom of the frame body 4, the lower end of the supporting leg 5 is provided with the fixing plate 6, the four corners of the fixing plate 6 are provided with through holes I 7, the fixing plate 6 is fixed to the ground through bolts, thereby achieving the purpose of stably supporting the support frame, and the frame body 4 is internally and fixedly provided with a cavity 8 with an open upper end, the size of the cavity 8 is matched with the internal space of the frame body 4;

[0032] The control assembly 1 comprises a distribution box controller 9, a flow meter 10, a pressure analysis module 11, a vibration analysis module 12, a processor 13 and a liquid crystal touch screen 14, the control assembly 1 is provided in a module integrated structure, the flow meter 10, the pressure analysis module 11, the vibration analysis module 12, the processor 13 and the liquid crystal touch screen 14 are all arranged in the distribution box controller 9, the control assembly 1 automatically adjusts the flushing intensity according to the real-time data in the cavity 8 detected by the flow sensor 50 and the pressure sensor 51, controls the heavy medium adhered to the material to be washed by the high-pressure flushing assembly 45, and controls the high-pressure pulse cleaning assembly 39 to automatically clean the screen mesh according to the vibration sensor 44 detecting that the screen mesh vibrates abnormally;

[0033] The magnetic separation flow guide integrated assembly 2 comprises a flow guide groove 15, a magnetic separation roller 16 and a driving motor 17, the flow guide groove 25 is arranged at the bottom of the cavity 8, the flow guide groove 15 is provided in a trapezoidal structure with a wide front and a narrow rear, the flow guide groove 15 is downwardly inclined from front to rear at an angle of 8° with the ground, the rear end of the flow guide groove 15 is provided with an outlet I 18, the magnetic separation roller 16 is arranged at the upper end of the flow guide groove 15, the rotating shafts at both ends of the magnetic separation roller 16 are rotatably supported through bearing seats 19, the central axis of the magnetic separation roller 16 and the center line of the flow guide groove 15 are parallel to each other and located on the same vertical plane, a gear is arranged on the rotating shaft at one end of the magnetic separation roller 16, the gear is engaged with the gear of the output shaft of the driving motor 17, the driving motor 17 is connected with the distribution box controller 9 through an electric wire, a medium recovery groove 20 is arranged at the preset position of the lower end of the magnetic separation roller 16, a U-shaped scraper 21 is arranged in the non-magnetic material area of the magnetic separation roller 16, the length of the U-shaped scraper 21 is equal to the length of the magnetic separation roller 16, the U-shaped scraper 21 is made of a non-magnetic material, and the U-shaped scraper 21 is used to scrape and guide the magnetic material to the medium recovery groove 20, the combined design of the magnetic separation flow guide integrated assembly 2 can quickly collect and recycle the magnetic heavy medium, reduce the load of subsequent medium removal equipment, effectively save costs, and improve the overall coal washing efficiency.

[0034] The upper end of the cavity 8 is fixedly provided with four screen frames 22, and the lower end of the screen frame 22 is fixedly provided with a screen frame 28 at a predetermined position.

[0035] The upper end of the screen frame 22 is provided with a screen plate 23, the screen plate 23 comprises a frame 24 and a screen 25, the outer edge of the screen 25 is provided with the frame 24, the shape and size of the frame 24 match the shape and size of the screen frame 22, a predetermined number of through holes 27 are symmetrically arranged at the corresponding positions of the frame 24 and the screen frame 22, and the frame 24 and the screen frame 22 are fixedly connected by bolts.

[0036] The upper end of the screen frame 28 is provided with a screen plate 29, the screen plate 29 comprises a frame 30 and a screen 31, the outer edge of the screen 31 is provided with the frame 30, the shape and size of the frame 30 match the shape and size of the screen frame 28, a predetermined number of through holes 33 are symmetrically arranged at the corresponding positions of the frame 30 and the screen frame 28, and the frame 30 and the screen frame 28 are fixedly connected by bolts.

[0037] The screen 25 and the screen 31 are provided with horizontally arranged screen hole units 35, the screen hole units 35 are arranged in a predetermined number, two adjacent screen hole units 35 are arranged in an interlaced structure, the screen 25 is provided with a strip-shaped screen hole 26, the length of the strip-shaped screen hole 26 is 15 mm, and the width is 0.5 mm, and the screen 31 is provided with a circular screen hole 32, the diameter of the circular screen hole 32 is 0.3 mm.

[0038] The center of the rear end of the screen plate 23 is provided with an outlet 36, the outlet 36 is connected with the screen plate 23 through a guide plate 37 which is inclined from both ends to the middle, the center of the rear end of the screen plate 29 is provided with an outlet 38, and the outlet 38 is connected with the screen plate 29 through a guide plate 37 which is inclined from both ends to the middle.

[0039] The high-pressure pulse cleaning assembly 39 comprises a gas pipe 40, a high-pressure nozzle 41, a gas pipe rack 42, a compressor 43 and a vibration sensor 44, the gas pipe 40 is arranged in a serpentine coil structure, a preset number of high-pressure nozzles 41 are sequentially arranged on the gas pipe 40, the gas pipe 40 is arranged at the bottom of the screen mesh I 25 and the screen mesh II 31 respectively, the opening direction of the high-pressure nozzle 41 at the bottom of the screen mesh I 25 is arranged to face the direction of the screen mesh I 25, the opening direction of the high-pressure nozzle 41 at the bottom of the screen mesh II 31 is arranged to face the direction of the screen mesh II 31, the arrangement position and the number of the high-pressure nozzle 41 can cover the entire screen surface, the gas pipe 40 is fixedly connected with the rack body 4 through the gas pipe rack 42, the front end of the gas pipe 40 is connected with the gas inlet of the compressor 43 through a pipeline in communication, the vibration sensor 44 is arranged at a preset position of the screen mesh I 25 and the screen mesh II 31, the vibration sensor 44 and the compressor 43 are connected with the distribution box controller 9 through wires respectively, the high-pressure nozzle 41 blows through the screen hole by releasing pulse gas flow instantaneously by compressed gas, so as to achieve the purpose of cleaning the screen hole blockage.

[0040] The high-pressure flushing assembly 45 comprises a liquid pipe 46, a nozzle 47, a liquid pipe rack 48, a circulating pump 49, a flow sensor 50 and a pressure sensor 51, the liquid pipe 46 is arranged in a serpentine coil structure, the liquid pipe 46 is arranged at the upper end of the screen mesh I 25, a preset number of nozzles 47 are sequentially arranged on the liquid pipe 46, the opening direction of the nozzle 47 is arranged to face the direction of the screen mesh I 25, the liquid pipe 46 is fixedly connected with the rack body 4 through the liquid pipe rack 48, the front end of the liquid pipe 46 is connected with the liquid inlet of the circulating pump 49 through a pipeline in communication, the flow sensor 50 and the pressure sensor 51 are arranged at preset positions inside the cavity 8 respectively, the flow sensor 50, the pressure sensor 51 and the circulating pump 49 are connected with the distribution box controller 9 through wires respectively.

[0041] A feeding port 52 is arranged at the middle position of the front end of the screen mesh I 25, the feeding port 52 is arranged in a trapezoidal structure with the front narrow and the rear wide, the width of the rear end of the feeding port 52 is equal to the width of the screen mesh I 25, a preset number of flow dividing plates 53 are symmetrically arranged on the feeding port 52 in the longitudinal direction.

[0042] The inner side wall of the flow guide groove 15 and the outer surface of the magnetic separation roller 16 are both provided with wear-resistant lining plates made of ceramic material, the screen plate I 23 and the screen plate II 29 are arranged in an integral molding structure, the screen plate I 23 and the screen plate II 29 are made of polyurethane material. Specific embodiments

[0043] The heavy medium pre-desorption efficient fixed separation screen is used in the coal washing equipment in the coal washing plant workshop to separate clean coal and heavy medium mixed materials, and after the position of the heavy medium pre-desorption efficient fixed separation screen is determined, the fixed part is fixed at the preset position on the ground, the positions of the four corners of the fixed plate 6 are fixed with the fixed part on the ground through the through hole I 7 using bolts, each device is checked for no abnormalities, the feed inlet 52 is communicated with the device that obtains clean coal and heavy medium mixed materials in the previous link, the distribution box controller 9 is connected with the commercial power, the liquid crystal touch screen 14 is turned on and always bright, the flow meter 10, the pressure analysis module 11, the vibration analysis module 12, the processor 13, the driving motor 14, the compressor 43, the vibration sensor 44, the circulating pump 49, the flow sensor 50 and the pressure sensor 51 all enter the standby state;

[0044] The device that obtains clean coal and heavy medium mixed materials in the previous link delivers the clean coal and heavy medium mixed materials to the feed inlet 52, the trapezoidal structure of the feed inlet 52 is arranged from narrow to wide, and the splitter plate 53 is longitudinally symmetrically arranged, so that the materials are uniformly distributed on the entire screen mesh I 25, and the screen mesh I 25 is designed to be inclined, so that the materials slide down by relying on their own gravity, in the process of sliding down, the nozzles 47 of the high-pressure flushing assembly 45 perform high-pressure flushing on the materials, small-particle materials are separated from the materials on the screen of the screen mesh I 25, and the mixture of materials smaller than the width of the slot-shaped screen hole 26 and water falls through the screen mesh I 25 to the screen mesh II 31 to be subjected to second separation, the materials on the screen of the screen mesh I 25 slide down through the flow guide plate 37 inclined from both ends to the middle to the outlet II 36 to flow out, obtaining large-particle clean coal, and the materials under the screen of the screen mesh I 25 are subjected to second separation through the screen mesh II 31, the materials smaller than the diameter of the circular screen hole 32 fall through the screen mesh II 31 to the bottom of the cavity 8, the materials on the screen of the screen mesh II 31 slide down through the flow guide plate 37 inclined from both ends to the middle to the outlet III 38 to flow out, two layers of screen meshes are used for separation, realizing rapid and efficient separation of heavy medium and coal, improving the passing rate of heavy medium, reducing the loss of heavy medium, obtaining large-particle and small-particle clean coal, and the large-particle and small-particle clean coal enters a subsequent link for processing and is put into the market according to needs;

[0045] In the sorting process, the setting is made through the liquid crystal touch screen 14, on the one hand, the control assembly 1 automatically obtains the pressure data in the cavity and the flow data of the material according to the flow sensor 50 and the pressure sensor 51, automatically controls the high-pressure water supply intensity of the circulating pump 49, provides the flushing water for the nozzle 47 of the high-pressure flushing assembly 45, continuously high-pressure flushes the heavy medium particles adhered on the material, realizes the separation of the heavy medium particles and the material, ensures the continuity of the work, on the other hand, the control assembly 1 automatically analyzes whether the vibration of the screen is abnormal according to the detection data of the vibration sensor 44 according to the screen surface, judges whether the screen is blocked, automatically controls the compressor 43 to spray high-pressure gas to the high-pressure nozzle 41 of the high-pressure pulse cleaning assembly 39 towards the screen I 25 and the screen II 31, automatically cleans the screen blockage, ensures the efficiency of the work, and the spraying time period can also be set through the liquid crystal touch screen 14 to automatically clean the screen regularly;

[0046] The magnetic heavy medium suspension falling to the bottom of the cavity 8 flows into the guide groove 15 through the medium discharge port 34. Due to the trapezoidal structure of the front wide and the rear narrow of the guide groove 15 and the inclined design, the downward flow of the magnetic heavy medium suspension is accelerated. In addition to the integrated design of the magnetic separation roller 16 and the guide groove 15, the rotating magnetic separation roller 16 quickly absorbs the magnetic substances in the magnetic heavy medium suspension, rotates the magnetic substances into the non-magnetic discharge area, and the U-shaped scraper 21 removes the magnetic substances from the surface of the magnetic separation roller 16, and guides the magnetic substances to the medium recovery groove 20 through the U-shaped scraper 21, for recycling, reducing the load of the subsequent medium removal equipment, effectively saving the cost, improving the overall coal washing efficiency, and the remaining water is discharged from the tail of the guide groove 15 to the water container and reused after treatment;

[0047] The inner side wall of the guide groove 15 and the outer surface of the magnetic separation roller 16 are provided with wear-resistant lining plates made of ceramic material, and the screen plate I 25 and the screen plate II 31 are made of polyurethane material, which improves the wear resistance of the equipment and increases the service life of the equipment.

Claims

1. A heavy medium pre-dense efficient fixed separation screen, comprising a control assembly (1), a magnetic separation flow guide integrated assembly (2) and a support frame (3), characterized in that, the support frame (3) comprises a frame body (4), a support leg (5) and a fixing plate (6), the frame body (4) is provided in a square structure, the support leg (5) is arranged at four corner positions of the bottom of the frame body (4), the lower end of the support leg (5) is provided with the fixing plate (6), the four corner positions of the fixing plate (6) are provided with through holes I (7), the fixing plate (6) is fixed with a ground fixing member through bolts, thereby achieving the purpose of stably supporting the support frame (3), and the frame body (4) is internally and fixedly provided with a cavity (8) with an open upper end, and the size of the cavity (8) is matched with the internal space of the frame body (4); the control assembly (1) comprises a distribution box controller (9), a flow meter (10), a pressure analysis module (11), a vibration analysis module (12), a processor (13) and a liquid crystal touch screen (14), the control assembly (1) is provided in a module integrated structure, the flow meter (10), the pressure analysis module (11), the vibration analysis module (12), the processor (13) and the liquid crystal touch screen (14) are all arranged inside the distribution box controller (9), and the control assembly (1) can automatically adjust the material flushing intensity and automatically clean the screen mesh blockage according to the related real-time data of the material in the cavity (8); the magnetic separation flow guide integrated assembly (2) comprises a flow guide groove (15), a magnetic separation roller (16) and a driving motor (17), the flow guide groove (15) is arranged at the bottom of the cavity (8), the flow guide groove (15) is provided in a trapezoidal structure with a wide front and a narrow rear, the flow guide groove (15) is downwardly inclined from front to rear, and the included angle with the ground is 8°, the rear end of the flow guide groove (15) is provided with an outlet I (18), the magnetic separation roller (16) is arranged at the upper end of the flow guide groove (15), the shafts at both ends of the magnetic separation roller (16) are rotatably supported through bearing seats (19), the central axis of the magnetic separation roller (16) and the center line of the flow guide groove (15) are parallel to each other and located on the same vertical plane, a gear is arranged on the shaft at one end of the magnetic separation roller (16), the gear is engaged with the gear of the output shaft of the driving motor (17), the driving motor (17) is connected with the distribution box controller (9) through wires, a medium recovery groove (20) is arranged at the preset position of the lower end of the magnetic separation roller (16), a U-shaped scraper (21) is arranged in the non-magnetic material unloading area of the magnetic separation roller (16), the length of the U-shaped scraper (21) is equal to the length of the magnetic separation roller (16), the U-shaped scraper (21) is made of a non-magnetic material, and the U-shaped scraper (21) is used for scraping off the magnetic material and guiding the magnetic material to the medium recovery groove (20).

2. A heavy media pre-concentration high efficiency stationary screen as claimed in claim 1, wherein, The upper end of the cavity (8) is fixedly provided with four screen frames I (22), the lower end of the screen frame I (22) is fixedly provided with a screen frame II (28) at a preset position, the lower end of the cavity (8) is provided in an inverted conical structure, the tail of the cavity (8) is provided with a medium discharge port (34), the rear end of the medium discharge port (34) is communicated with the front end of the flow guide groove (15), and the width of the rear end of the medium discharge port (34) is equal to the width of the front end of the flow guide groove (15); The upper end of the screen frame I (22) is provided with a screen plate I (23), the screen plate I (23) comprises a frame body I (24) and a screen mesh I (25), the outer edge of the screen mesh I (25) is provided with the frame body I (24), the shape and size of the frame body I (24) are matched with the shape and size of the screen frame I (22), a preset number of through holes II (27) are symmetrically formed in the corresponding preset positions of the frame body I (24) and the screen frame I (22), and the frame body I (24) and the screen frame I (22) are fixed by bolts; the screen plate I (23) is provided in a downward inclination from front to back, and the included angle between the screen plate I (23) and the ground is 30°; and the inclination angle of the screen frame I (22) is matched with the inclination angle of the screen plate I (23). The upper end of the screen frame II (28) is provided with a screen plate II (29), the screen plate II (29) comprises a frame body II (30) and a screen mesh II (31), the outer edge of the screen mesh II (31) is provided with the frame body II (30), the shape and size of the frame body II (30) are matched with the shape and size of the screen frame II (28), a preset number of through holes III (33) are symmetrically formed in the corresponding preset positions of the frame body II (30) and the screen frame II (28), and the frame body II (30) and the screen frame II (28) are fixed by bolts; the screen plate II (29) is provided in a downward inclination from front to back, and the included angle between the screen plate II (29) and the ground is 30°; and the inclination angle of the screen frame II (28) is matched with the inclination angle of the screen plate II (29). The screen mesh I (25) and the screen mesh II (31) are both provided with horizontally arranged screen hole units (35), the screen hole units (35) are arranged in a preset number, two adjacent screen hole units (35) are arranged in an interlaced structure, the screen mesh I (25) is provided in a strip-shaped screen hole (26), the length of the strip-shaped screen hole (26) is 15 mm, and the width thereof is 0.5 mm, and the screen mesh II (31) is provided in a circular screen hole (32), and the diameter of the circular screen hole (32) is 0.3 mm. The rear end of the screen plate I (23) is provided with an outlet II (36) at a central position, the outlet II (32) is connected with the screen plate I (23) through a flow guide plate (37) inclined from two ends to the middle, the rear end of the screen plate II (29) is provided with an outlet III (38) at a central position, and the outlet III (38) is connected with the screen plate II (29) through a flow guide plate (37) inclined from two ends to the middle.

3. A dense medium pre-concentration high efficiency stationary screen as claimed in claim 2, characterised in that, Also includes a high pressure pulse cleaning assembly (39), the high pressure pulse cleaning assembly (39) includes a gas pipe (40), high pressure nozzle (41), gas pipe rack (42), compressor (43) and vibration sensor (44), the gas pipe (40) is set as a serpentine coil structure, the gas pipe (40) has orderly arranged a preset number of high pressure nozzles (41), the gas pipe (40) is respectively arranged at the bottom of the screen mesh I (25) and screen mesh II (31), the opening direction of the high pressure nozzle (41) at the bottom of the screen mesh I (25) is set as the direction towards the screen mesh I (25), the opening direction of the high pressure nozzle (41) at the bottom of the screen mesh II (31) is set as the direction towards the screen mesh II (31), the setting position and the number of the high pressure nozzle (41) can cover the whole screen surface, the gas pipe (40) is fixedly connected with the frame body (4) through the gas pipe rack (42), the front end of the gas pipe (40) is communicated with the gas inlet of the compressor (43) through a pipeline, the preset positions of the screen mesh I (25) and the screen mesh II (31) are provided with vibration sensors (44), the vibration sensor (44) and the compressor (43) are connected with the distribution box controller (9) through wires respectively, the high pressure nozzle (41) blows through the screen hole by releasing pulse airflow instantaneously through compressed gas, so as to achieve the purpose of cleaning the screen hole blockage.

4. A dense medium pre-concentration high efficiency stationary screen as claimed in claim 3, characterised in that, Also includes a high pressure flushing assembly (45), the high pressure flushing assembly (45) includes a liquid pipe (46), a nozzle (47), a liquid pipe rack (48), a circulating pump (49), a flow sensor (50) and a pressure sensor (51), the liquid pipe (46) is set as a serpentine coil structure, the liquid pipe (46) is arranged at the upper end of the screen mesh I (25), the liquid pipe (46) is orderly provided with a preset number of nozzles (47), the opening direction of the nozzle (47) is set as the direction towards the screen mesh I (25), the liquid pipe (46) is fixedly connected with the frame body (4) through the liquid pipe rack (48), the front end of the liquid pipe (46) is communicated with the liquid inlet of the circulating pump (49) through a pipeline, the flow sensor (50) and the pressure sensor (51) are respectively arranged at the preset positions inside the cavity (8), the flow sensor (50), the pressure sensor (51) and the circulating pump (49) are connected with the distribution box controller (9) through wires respectively.

5. A dense medium pre-concentration high efficiency stationary screen as claimed in claim 2, characterised in that, The middle position of the front end of the screen mesh I (25) is provided with a feed inlet (52), the feed inlet (52) is set as a trapezoidal structure with the front narrow and the rear wide, the width of the rear end of the feed inlet (52) is equal to the width of the screen mesh I (25), a preset number of flow dividing plates (53) are vertically symmetrically arranged on the feed inlet (52).

6. A dense medium pre-concentration high efficiency stationary screen as claimed in claim 1, characterized in that, The inner side wall of the flow guide groove (15) and the outer surface of the magnetic separation roller (16) are both provided with wear-resistant lining plates made of ceramic material.

7. A dense medium pre-concentration high efficiency stationary screen as claimed in claim 2, wherein, The screen plate I (23) and the screen plate II (29) are set as an integral molding structure, the screen plate I (23) and the screen plate II (29) are made of polyurethane material.

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