A jig coal separation device

Abstract

The present invention discloses a jig coal separation device, belonging to the technical field of jig machines, which includes a chassis and a sieve plate assembly installed above the inner side of the chassis. The sieve plate assembly includes a first sieve plate, a second sieve plate, and a third sieve plate arranged in parallel. The first sieve plate, the second sieve plate, and the third sieve plate are connected by a limiting component. The second sieve plate is installed on the lower side of the first sieve plate closely attached to the lower surface of the first sieve plate, and the third sieve plate is installed on the lower side of the second sieve plate closely attached to the lower surface of the second sieve plate. A number of first through holes are provided on the first sieve plate, second through holes corresponding one-to-one to the first through holes are provided on the second sieve plate, and third through holes corresponding one-to-one to the second through holes are provided on the third sieve plate. The overlapping part of the projections of the first through hole, the second through hole, and the third through hole in the vertical direction forms a first sieve hole. The device of the present invention can timely compensate the aperture of the first sieve hole when the first sieve hole of the sieve plate is worn, and solves the problem of shutdown caused by the need to replace or repair the sieve plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of jig machines, and particularly relates to a jig coal separation device. Background Art

[0002] Jig coal separation is a common gravity coal separation method, and its principle is based on the difference in the settling velocity of particles in a pulsating water flow to achieve coal separation. Particles of different densities have different settling velocities in a pulsating water flow. During the upward water flow, the bed layer is loosened and the particles start to stratify. Larger density particles (such as gangue) are subject to a relatively smaller upward acting force compared to their gravity in the upward water flow, and their settling velocity is fast. While smaller density particles (such as clean coal) are subject to a relatively larger upward acting force compared to their gravity, and the settling velocity is slow. Components such as the sieve plate, air valve, and discharge device of the jig machine are prone to wear under the long-term contact with coal particles and the impact of pulsating water flow, and need to replace components regularly, increasing the equipment maintenance cost and downtime. When the existing jig machine is in use, it is easy to cause wear on the first sieve holes of the sieve plate. After the first sieve holes are worn, the aperture becomes larger, which will affect the accuracy of coal separation. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a jig coal separation device, which can timely compensate the aperture of the first sieve holes when the first sieve holes of the sieve plate are worn, solve the problem of downtime caused by the need to replace or repair the sieve plate, and improve the accuracy and efficiency of coal separation.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A jig coal separation device disclosed by the present invention includes a machine case and a sieve plate assembly installed above the inner side of the machine case. The sieve plate assembly includes a first sieve plate, a second sieve plate, and a third sieve plate arranged in parallel. The first sieve plate, the second sieve plate, and the third sieve plate are connected by a limit assembly. The second sieve plate is installed on the lower side of the first sieve plate closely attached to the lower surface of the first sieve plate, and the third sieve plate is installed on the lower side of the second sieve plate closely attached to the lower surface of the second sieve plate. A plurality of first through holes are formed on the first sieve plate, second through holes corresponding to the first through holes one by one are formed on the second sieve plate, and third through holes corresponding to the second through holes one by one are formed on the third sieve plate. The overlapping part of the projections of the first through holes, the second through holes, and the third through holes in the vertical direction forms a first sieve hole. Longitudinal displacement control devices are connected to both the first sieve plate and the second sieve plate, and a lateral position control device is connected to the third sieve plate.

[0006] Further, large holes are installed on the first sieve plate, the second sieve plate, and the third sieve plate. The limiting component includes a pressing plate, an elastic pull rod, and a nut. The elastic pull rod passes through the large holes of the three sieve plates and nuts are connected to both ends. Pressing plates are installed on the upper side of the first sieve plate and the lower side of the third sieve plate. The pressing plates are sleeved on the outer side of the elastic pull rod, and the two pressing plates are pressed against the sieve plate surface by the two nuts respectively.

[0007] Further, grooves are formed on the surface of the pressing plate. The grooves are evenly distributed on the outer edge of the pressing plate centered on the elastic pull rod, and balls are rotatably installed in the grooves. The balls are in contact with the surface of the sieve plate.

[0008] Further, a plurality of inclined plates are evenly spaced on the upper side of the first sieve plate. The inclined plates are inclined towards the flow direction of the water, and second sieve holes are formed in the inclined plates.

[0009] Further, the inclined plates are made of spring steel material.

[0010] Further, the longitudinal displacement control device includes a vertical telescopic connecting rod, a rack, a sliding seat, a gear, and a first motor. The first sieve plate or the second sieve plate is connected to the rack through the telescopic connecting rod. The rack is slidably matched with the sliding seat. The sliding seat and the first motor are fixed to the machine case. The rack is simultaneously meshed with the gear, and the gear is connected to the first motor.

[0011] Further, the telescopic connecting rod includes an outer rod, an inner rod, and a spring. The outer rod is connected to the first sieve plate or the second sieve plate. One end of the inner rod is slidably installed inside the outer rod, and the other end of the inner rod is fixedly connected to the rack. The spring is sleeved on the outer side of the inner rod, and both ends of the spring are fixedly connected to the outer rod and the rack respectively.

[0012] Further, a sieve hole detection component is installed below the sieve plate assembly. The sieve hole detection component includes a pressure sensor, a detection column, a hydraulic cylinder, a sliding table, and a planar displacement driving component. The sliding table is installed at the output end of the planar displacement driving component. A hydraulic cylinder is fixed on the sliding table. The output end of the hydraulic cylinder is connected to the detection column, and a pressure sensor is installed at the upper end of the detection column.

[0013] The beneficial effects of the present invention are as follows:

[0014] A jig coal separation device disclosed by the present invention, by arranging three adjacent sieve plates, the first sieve hole is formed by the overlapping part of the through holes on the three sieve plates in the vertical direction. When the first sieve hole is worn and becomes larger, the positions of the sieve plates can be moved longitudinally and transversely, so that the outer edge position of the first sieve hole is adjusted, thereby compensating the inner diameter of the sieve hole, solving the problem of shutdown caused by the need to replace or repair the sieve plate, and improving the accuracy and efficiency of coal separation.

[0015] In the device of the present invention, the first sieve holes formed by arranging three sieve plates can ensure the screening ability of the first sieve holes with an appropriate number of sieve plates. The compensation method is simpler and easier to control.

[0016] Other advantages, objectives, and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. Brief Description of the Drawings

[0017] In order to make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for description:

[0018] Figure 1 It is a schematic structural diagram of the jig coal separation device of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the sieve plate assembly of the present invention;

[0020] Figure 3 It is a schematic structural diagram of three sieve plates;

[0021] Figure 4 It is a combined schematic diagram of three sieve plates;

[0022] Figure 5 It is a schematic structural diagram of the longitudinal displacement control device;

[0023] Figure 6 It is a schematic structural diagram of the limit assembly;

[0024] Figure 7 It is a schematic structural diagram of the sieve hole detection assembly.

[0025] The reference numerals in the drawings are as follows: chassis 1, sieve plate assembly 2, first sieve plate 3, second sieve plate 4, third sieve plate 5, limit assembly 6, first through hole 7, second through hole 8, third through hole 9, longitudinal displacement control device 10, large hole 11, pressing plate 12, elastic pull rod 13, nut 14, groove 15, ball 16, inclined plate 17, second sieve hole 18, vertical telescopic connecting rod 19, rack 20, sliding seat 21, gear 22, first motor 23, outer rod 24, inner rod 25, spring 26, sieve hole detection assembly 27, pressure sensor 28, detection column 29, hydraulic cylinder 30, sliding table 31, planar displacement driving assembly 32. Detailed Embodiment

[0026] As Figures 1 - 7As shown in the figure, a jigging coal separation device disclosed by the present invention includes a chassis 1 and a sieve plate assembly 2 installed above the inner side of the chassis 1. The chassis 1 adopts an existing structure, and a feeder evenly and stably feeds materials such as raw coal or ore onto the sieve plate assembly 2 of the jig. The feeding speed needs to be reasonably adjusted according to the processing capacity and separation effect of the jig. The pulsation mechanism provides the power for water pulsation. When compressed air is alternately fed into the air chamber, the water in the jig chamber is forced to rise, forming an upward water flow; when the compressed air in the air chamber is discharged, the water level in the jig chamber automatically drops, forming a downward water flow. The function of the sieve plate assembly 2 is to support the materials and enable water to pass through the sieve holes to form upward and downward water flows. Parameters such as the aperture and opening ratio of the sieve plate assembly 2 will affect the speed and uniformity of the water flow, and thus affect the layering effect of the materials. Generally speaking, the aperture of the sieve plate assembly 2 is selected according to the particle size of the selected materials to ensure that the materials can form a stable bed layer on the sieve plate assembly 2, and at the same time allow the heavy products of fine particles to pass through the sieve and be discharged. During the layering process of the materials, the bed layer detection device real-time monitors parameters such as the thickness and density of the bed layer and feeds back the signals to the control system. According to the feedback information, the operator or the automated control system can timely adjust the operating parameters of the jig, such as the jigging frequency, amplitude, air volume, water volume, etc., to ensure that the bed layer is always in a good layering state. The discharging mechanism is responsible for discharging the layered heavy products and light products from the jig respectively.

[0027] Among them, the sieve plate assembly 2 disclosed by the present invention includes a first sieve plate 3, a second sieve plate 4, and a third sieve plate 5 arranged in parallel. The three sieve plates are all rectangular. The first sieve plate 3, the second sieve plate 4, and the third sieve plate 5 are connected in the thickness direction by a limiting component 6 to limit the separation of the three sieve plates. The second sieve plate 4 is installed on the lower side of the first sieve plate 3 close to the lower surface of the first sieve plate 3, and the third sieve plate 5 is installed on the lower side of the second sieve plate 4 close to the lower surface of the second sieve plate 4 to ensure the sealing between the plates and prevent impurities from entering.

[0028] Specifically, a number of first through holes 7 are provided on the first sieve plate 3, second through holes 8 corresponding to the first through holes 7 one by one are provided on the second sieve plate 4, and third through holes 9 corresponding to the second through holes 8 one by one are provided on the third sieve plate 5. The first through holes 7, the second through holes 8, and the third through holes 9 are all circular. The overlapping part of the projections of the first through holes 7, the second through holes 8, and the third through holes 9 in the vertical direction forms a first sieve hole. Longitudinal displacement control devices 10 are connected to both the first sieve plate 3 and the second sieve plate 4, and a lateral position control device is connected to the third sieve plate 5.

[0029] Taking the flow direction of the water flow as the longitudinal direction, the longitudinal displacement control devices 10 are respectively installed on the first sieve plate 3 and the second sieve plate 4 in the present invention. Thereby, the first sieve plate 3 and the second sieve plate 4 can be driven to displace longitudinally, and both can uniformly compensate the edge positions of the first sieve holes longitudinally. After the third through holes 9 on the third sieve plate 5 are displaced transversely, they can compensate the edge positions of the first sieve holes transversely, so that all the edge positions of the outer side of the first sieve holes are adjusted, thereby integrally compensating the inner diameter of the sieve holes, solving the problem of shutdown caused by the need to replace or repair the sieve plates, improving the precision and efficiency of coal separation, not affecting the speed and uniformity of the water flow, and stabilizing the stratification effect of the materials.

[0030] In this embodiment, large holes 11 are installed on the first sieve plate 3, the second sieve plate 4, and the third sieve plate 5. The limiting assembly 6 includes a pressing plate 12, an elastic pull rod 13, and a nut 14. The elastic pull rod 13 passes through the large holes 11 of the three sieve plates and nuts 14 are connected to both ends. The diameter of the large hole 11 is larger than the diameter of the elastic pull rod 13, and the elastic pull rod 13 can displace radially within the large hole 11. Pressing plates 12 are installed on the upper side of the first sieve plate 3 and the lower side of the third sieve plate 5. The pressing plates 12 are sleeved on the outer sides of the elastic pull rods 13, and the two pressing plates 12 are respectively pressed against the sieve plate surfaces by the two nuts 14. The first sieve plate 3, the second sieve plate 4, and the third sieve plate 5 can be elastically pressed along the thickness direction by the two pressing plates 12, but it will not obstruct the sieve plates longitudinally or transversely. The elastic pull rod 13 is made of an elastic material, and there is also a certain displacement space for the three sieve plates in the thickness direction. While the water flow pulsates up and down, the sieve plate assembly 2 can also pulsate with the water flow, improving the stratification effect of the coal mine.

[0031] In this embodiment, grooves 15 are formed on the surface of the pressing plate 12. The grooves 15 are evenly distributed on the outer edge of the pressing plate 12 centered on the elastic pull rod 13. Ball bearings 16 are installed in the grooves 15 in a rolling manner, and the ball bearings 16 are in contact with the surface of the sieve plate, which can reduce the friction force, thereby reducing the obstruction to the sieve plate longitudinally or transversely.

[0032] In this embodiment, a plurality of inclined plates 17 are evenly spaced on the upper side of the first sieve plate 3. The inclined plates 17 are inclined towards the flow direction of the water flow, and second sieve holes 18 are formed in the inclined plates 17. By providing the inclined plates 17, the stratification ability of the coal mine is further improved. The inclined plates 17 are made of spring 26 steel material and can be elastically buffered to a certain extent in the water flow direction. Between the inclined plates 17, the stratification effect of the coal mine can be improved, and the separation effect of some coals and impurities such as gangue with similar densities and smaller particle sizes is increased.

[0033] In this embodiment, the longitudinal displacement control device 10 includes a vertical telescopic connecting rod 19, a rack 20, a sliding seat 21, a gear 22, and a first motor 23. The first sieve plate 3 or the second sieve plate 4 is connected to the rack 20 through a telescopic connecting rod. The rack 20 is slidably engaged with the sliding seat 21. The sliding seat 21 and the first motor 23 are fixed to the chassis 1. The rack 20 is simultaneously engaged with the gear 22, and the gear 22 is connected to the first motor 23. The longitudinal displacement is controlled by the gear 22 and the rack 20, which is more convenient for control. By providing the telescopic connecting rod, the vertical displacement of the sieve plate will not be hindered.

[0034] In this embodiment, the telescopic connecting rod includes an outer rod 24, an inner rod 25, and a spring 26. The outer rod 24 is connected to the first sieve plate 3 or the second sieve plate 4. One end of the inner rod 25 is slidably installed inside the outer rod 24, and the other end of the inner rod 25 is fixedly connected to the rack 20. The spring 26 is sleeved outside the inner rod 25, and both ends of the spring 26 are fixedly connected to the outer rod 24 and the rack 20 respectively. It can provide a certain elastic recovery ability to the sieve plate in the vertical direction. The overall device has a simple structure and a more stable telescopic process.

[0035] In the embodiment of the present invention, the structures of the two longitudinal displacement control devices 10 are exactly the same. For the lateral displacement control device, the structure of the lateral displacement control device is also the same as that of the longitudinal displacement control device 10, except that in terms of the setting direction of the rack 20, the rack 20 of the lateral displacement control device is along the horizontal direction, which can be understood by those skilled in the art.

[0036] In this embodiment, a sieve hole detection component 27 is installed below the sieve plate assembly 2. The sieve hole detection component 27 includes a pressure sensor 28, a detection column 29, a hydraulic cylinder 30, a sliding table 31, and a planar displacement driving component 32. The sliding table 31 is installed at the output end of the planar displacement driving component 32. A hydraulic cylinder 30 is fixed on the sliding table 31. The output end of the hydraulic cylinder 30 is connected to a detection column 29, and a pressure sensor 28 is installed at the upper end of the detection column 29. The detection column 29 can be used to detect the diameter of the first sieve hole. The planar displacement driving component 32 drives the sliding table 31 to move to different detection positions, so that the detection column 29 is located directly below the first sieve hole. When the detection column 29 extends out, if the pressure sensor 28 on the detection column 29 does not respond, the detection column 29 is retracted, and the longitudinal displacement control device 10 and the lateral displacement control device are adjusted to make the diameter of the first sieve hole become smaller according to a preset degree of change until the pressure sensor 28 is normally pressured.

[0037] In the embodiment of the present invention, the planar displacement driving assembly 32 includes a belt, belt pulleys, a longitudinal guide rod, a transverse slide 21, a second motor, a transverse guide rod, a lead screw, a support and a third motor. The slide table 31 is fixed in the middle of the belt. The two ends of the belt are respectively tensioned by two belt pulleys, and one of the belt pulleys is connected to the second motor, and the second motor is fixed on the transverse slide 21. A longitudinal guide rod is connected between the two transverse slides 21, and the longitudinal guide rod simultaneously passes through the slide table 31. A lead screw is threadedly connected to the transverse slide 21. The two ends of the lead screw are respectively rotatably connected to supports, and the lead screw is simultaneously drivingly connected to a third motor, and the supports are fixed to the lower side of the chassis 1. A transverse guide rod is simultaneously passed through the transverse slide 21, and the two ends of the transverse guide rod are respectively fixedly connected to the supports.

[0038] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A jig coal separation device, comprising a chassis and a sieve plate assembly installed above the inner side of the chassis, characterized in that: The sieve plate assembly includes a first sieve plate, a second sieve plate, and a third sieve plate that are arranged in parallel. The first sieve plate, the second sieve plate, and the third sieve plate are connected by a limit assembly. The second sieve plate is installed on the lower side of the first sieve plate closely attached to the lower surface of the first sieve plate, and the third sieve plate is installed on the lower side of the second sieve plate closely attached to the lower surface of the second sieve plate. A number of first through holes are formed in the first sieve plate, second through holes corresponding to the first through holes one by one are formed in the second sieve plate, and third through holes corresponding to the second through holes one by one are formed in the third sieve plate. The overlapping part of the projections of the first through hole, the second through hole, and the third through hole in the vertical direction forms a first sieve hole. Longitudinal displacement control devices are connected to both the first sieve plate and the second sieve plate, and a lateral position control device is connected to the third sieve plate. Large holes are installed on the first sieve plate, the second sieve plate, and the third sieve plate. The limit assembly includes a pressing plate, an elastic pull rod, and a nut. The elastic pull rod passes through the large holes of the three sieve plates and nuts are connected to both ends. Pressing plates are installed on the upper side of the first sieve plate and the lower side of the third sieve plate. The pressing plates are sleeved on the outer side of the elastic pull rod, and the two pressing plates are respectively pressed against the sieve plate surface by two nuts. Embedded grooves are formed on the surface of the pressing plate. The embedded grooves are evenly distributed on the outer edge of the pressing plate centered on the elastic pull rod. Rolling balls are installed in the embedded grooves in a rolling manner, and the rolling balls are in contact with the surface of the sieve plate. A sieve hole detection assembly is installed below the sieve plate assembly. The sieve hole detection assembly includes a pressure sensor, a detection column, a hydraulic cylinder, a sliding table, and a planar displacement driving assembly. The sliding table is installed at the output end of the planar displacement driving assembly. A hydraulic cylinder is fixed on the sliding table. The output end of the hydraulic cylinder is connected to the detection column, and a pressure sensor is installed at the upper end of the detection column.

2. The jigging coal separation device according to claim 1, characterized in that: A number of inclined plates are evenly spaced on the upper side of the first sieve plate. The inclined plates are inclined towards the flow direction of the water, and second sieve holes are formed in the inclined plates.

3. The jig coal separation device according to claim 2, wherein: The inclined plates are made of spring steel material.

4. A jigging coal separation device according to claim 1, characterized in that: The longitudinal displacement control device includes a vertical telescopic connecting rod, a rack, a sliding seat, a gear, and a first motor. The first sieve plate or the second sieve plate is connected to the rack through a telescopic connecting rod. The rack is slidably matched with the sliding seat. The sliding seat and the first motor are fixed to the machine case. The rack is simultaneously meshed with the gear, and the gear is connected to the first motor.

5. The jig coal separation device according to claim 4, characterized in that: The telescopic connecting rod includes an outer rod, an inner rod, and a spring. The outer rod is connected to the first sieve plate or the second sieve plate. One end of the inner rod is slidably installed inside the outer rod, and the other end of the inner rod is fixedly connected to the rack. The spring is sleeved on the outer side of the inner rod, and both ends of the spring are respectively fixedly connected to the outer rod and the rack.

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