Jigging washing and selecting machine for coal washing and using method of jigging washing and selecting machine

Abstract

The invention relates to the technical field of coal mine cleaning, in particular to a jigging washing and selecting machine for coal washing and a using method thereof.The jigging washing and selecting machine comprises a main frame body, the interior of the main frame body is divided into a second screening cavity and a first screening cavity through an isolation frame, and the front end of the first screening cavity is provided with a feeding port used for feeding and a water inlet pipe used for supplying water; and a tail end discharge port for discharging clean coal is formed in the rear end of the second screening cavity. According to the jigging washing machine for coal washing, a coal mine can be layered through the front-end liquid pushing plate, the fluidity of coal, coal gangue and the coal mine can be enhanced through the rear-end liquid pushing plate, the coal gangue and middling coal can be actively discharged through the discharging shaft, and therefore blockage is effectively avoided, and the water consumption in the discharging and washing process is reduced. Therefore, the problems that an existing jigger is large in water consumption and easy to block, and the washing efficiency is easy to reduce are solved, and the working reliability and the water-saving capacity of the jigger can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine cleaning, in particular to a coal washing jig washing machine and a use method thereof. Background Art

[0002] Since coal is a mixture, including coal, gangue, mud and other materials, it needs to be screened after mining. Among them, using a jig to wash coal is the most commonly used method in the coal industry.

[0003] Jigs make coal flow in a vertically ascending medium, thereby washing the coal according to density differences, so that gangue, silt and other slag in the coal can be washed out, and medium coal and clean coal can be separated. However, in order to effectively separate coal, gangue, silt and other slag, the existing jigs need to use a large amount of water for flushing, especially when discharging slag, gangue and medium coal, it is necessary to maintain the water flow rate to avoid minerals and slag blocking the inside of the equipment, which requires the use of a large amount of water, thus bringing huge wastewater treatment pressure to the enterprise. If the water flow rate is reduced, it is difficult to achieve a good washing effect, and when the slag content in the coal is high, it is still difficult to avoid the slag from settling inside the equipment, especially at the mesh of the screen and the position of the feed port, by simply increasing the water flow rate. Therefore, the equipment needs to be cleaned regularly, and the screening efficiency of the equipment during normal use is affected.

[0004] Therefore, we need a coal washing jig washing machine and its use method to solve the problems of large water consumption, easy clogging and low washing efficiency of the existing jig, which can effectively improve the working reliability and water-saving ability of the jig. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of large water consumption, easy clogging and low washing efficiency of existing jigs. The present application provides a jig washing machine for coal washing and a method of using the same, which can effectively improve the working reliability and water-saving ability of the jig.

[0006] To achieve the above object, the present invention provides the following technical solution: a coal washing and selecting jig washing machine, comprising: A main frame, the interior of which is divided into a second screening chamber and a first screening chamber by an isolation frame, the front end of the first screening chamber is provided with a feed port for loading and a water inlet pipe for water supply, and the rear end of the second screening chamber is provided with a terminal discharge port for discharging clean coal, a first screen is provided in the first screening chamber, and a second screen is provided in the second screening chamber; A bottom shell, the main frame is provided with a bottom shell for discharging slag at the bottom corresponding to the first screening chamber and the second screening chamber, and an installation shell is fixedly installed in the bottom shell, a front end liquid pushing plate corresponding to the front end of the first screening chamber or the front end of the second screening chamber is fixedly installed in the installation shell, and the front end liquid pushing plate is used to vertically push the water flow to make the coal mine in the first screening chamber or the second screening chamber stratified, a rear end liquid pushing plate corresponding to the rear end of the first screening chamber or the rear end of the second screening chamber is fixedly installed in the installation shell, and the rear end liquid pushing plate is used to float the medium coal or coal gangue located above the first screen and the second screen by vertically pushing the water flow, and a power device for driving the front end liquid pushing plate and the rear end liquid pushing plate to move vertically is provided in the bottom shell.

[0007] Preferably, a top cover for sealing the main frame is fixedly installed on the top of the main frame, and the top cover is used to prevent water or coal mines in the first screening chamber and the second screening chamber from splashing out, a handle for conveniently opening the top cover is fixedly installed on the top cover, and a transparent observation window for conveniently observing the working conditions in the first screening chamber and the second screening chamber is fixedly installed on the top cover, the main frame is provided with a discharge channel for discharging medium coal or coal gangue at the rear ends corresponding to the first screen and the second screen, and a discharge shaft for discharging the medium coal or coal gangue by squeezing the medium coal or coal gangue when rotating is rotatably installed in the discharge channel, a discharge motor for driving the discharge shaft is fixedly installed on the main frame, and a controller electrically connected to the power device and the discharge motor respectively is fixedly installed on the main frame.

[0008] Preferably, a guide rail is fixedly installed on the top cover along the front-to-back direction, and a pushing device for pushing the coal mine to move is provided on the guide rail, and the pushing device includes a moving seat slidably installed on the guide rail, and an auxiliary motor electrically connected to the controller is fixedly installed on the moving seat, and a driving wheel is driven by the output end of the auxiliary motor, and a rack meshing with the driving wheel is provided on the guide rail, and a connecting arm is provided below the moving seat, and a triangular pushing plate for scraping the upper surface of the first screen or the upper surface of the second screen is provided below the connecting arm, and a vertical pushing end for pushing the coal gangue or medium coal on the first screen or the second screen into the discharge channel is provided on the triangular pushing plate in the direction toward the rear end of the main frame, and an inclined end for shoveling up the coal gangue or medium coal on the first screen or the second screen is provided on the triangular pushing plate in the direction toward the front end of the main frame.

[0009] Preferably, the discharge shaft includes a central axis body fixedly mounted on the output end of the discharge motor, and at least four support plates are arranged on the central axis body in a circular array, and a material trough for accommodating medium coal or coal gangue is formed between the support plates, and the support plates and the central axis body are both wrapped with rubber sleeves, and the outer wall surface of the rubber sleeve is sealed with the inner wall surface of the discharge channel.

[0010] Preferably, the rear end liquid pushing plate and the front end liquid pushing plate are both sealed with the mounting shell via an isolation rubber membrane, and the mounting shell and the bottom shell are fixedly mounted via bolts.

[0011] Preferably, independent power devices are used in the installation shell to drive the rear end push plate and the front end push plate to move respectively, and the power device includes a top slide bar fixedly mounted with the rear end push plate or the front end push plate, and the top slide bar is slidably mounted in the bottom sleeve, the bottom of the bottom sleeve is fixedly mounted on the bottom connecting plate, and a first return spring is installed between the bottom connecting plate and the top slide bar to drive the top slide bar to slide downward, the bottom connecting plate is fixedly mounted on the installation shell, and a first drive motor is fixedly mounted on the bottom connecting plate, and the output end of the first drive motor drives the top slide bar to move upward through a first cam.

[0012] Preferably, a bottom cavity is formed between the bottom of the mounting shell and the bottom of the bottom shell, and a bottom flow channel for connecting the bottom of the first screening cavity or the bottom of the second screening cavity with the bottom cavity is formed between the side of the mounting shell and the side of the bottom shell, a vibration device for vibrating the water flow in the bottom cavity is arranged in the bottom cavity, the vibration device comprises an upper shell mounted on the bottom of the mounting shell, and a lower shell is fixedly mounted on the bottom of the upper shell through a central guide column, a sliding sleeve is slidably mounted on the central guide column, and an annular frame for pushing the water flow is fixedly mounted on the outside of the sliding sleeve, a sealing rubber membrane for isolating the water flow is fixedly mounted between the outside of the upper shell and the outside of the lower shell, and the sealing rubber membrane is fixedly mounted to the outside of the annular frame, a second driving motor is fixedly mounted on the lower shell, and the output end of the second driving motor drives the sliding sleeve to move upward along the central guide column through a second cam, and a second reset spring for driving the sliding sleeve to reset downward is fixedly mounted between the sliding sleeve and the lower shell.

[0013] Preferably, a storage device for collecting material slag is provided at the bottom of the bottom shell, and the storage device includes a storage tank fixedly mounted on the bottom shell, and a storage cavity connected to the bottom cavity and used for storing material slag is provided inside the storage tank, a closing device for closing the storage cavity is fixedly mounted on the bottom of the bottom shell, and the closing device includes a push rod fixedly mounted on the bottom shell, the output end of the push rod drives a pushing frame that moves up and down, and a steering motor is fixedly mounted on the pushing frame, the output end of the steering motor drives a worm, and the output end of the pushing frame drives a bottom cover for closing the bottom of the storage cavity, a worm gear meshing with the worm is fixedly mounted on the rotating shaft of the bottom cover, and a closing plug inserted into the storage cavity for preventing the bottom cover from rotating is fixedly mounted on the top of the bottom cover.

[0014] Preferably, an annular flow channel is formed at the bottom of the bottom cavity, and the annular flow channel is connected to the storage cavity through at least one discharge pipe, and a rotating motor electrically connected to the controller is fixedly installed at the center of the bottom shell corresponding to the annular flow channel, and the rotating motor is used to drive a pressing device located in the annular flow channel to rotate, and the pressing device includes a center plate coaxially fixedly installed with the output shaft of the rotating motor, and a pushing scraper for closing the upper end of the discharge pipe and scraping the inner wall of the bottom cavity is fixedly installed on the center plate, one side of the pushing scraper is integrally formed with an arc-shaped pressing end for pressing the slag into the discharge pipe, and the other end of the pushing scraper is integrally formed with an arc-shaped feeding end for guiding the slag into the bottom of the arc-shaped pressing end.

[0015] A method for using a jigging washing machine for coal washing comprises the following steps: Step 1: When in use, firstly, water is injected into the first screening chamber and the second screening chamber through the water inlet pipe, at which time the water will fill the corresponding bottom shell and flow out through the end discharge port, and then the coal raw material is injected into the first screening chamber through the feed port, at which time the coal raw material will gradually move from the front end of the main frame to the rear end of the main frame under the impetus of the water flow; Step 2: The operator then controls the power device to drive the rear end liquid pushing plate and the front end liquid pushing plate to perform periodic up and down movements. The rear end liquid pushing plate and the front end liquid pushing plate will push the water flow above them and drive the coal in the water flow to vibrate up and down. During the vibration process, the slag with a smaller particle size that can pass through the first screen and the second screen will move downward to the inside of the bottom shell and eventually be discharged from the bottom of the bottom shell. The coal raw materials in the first screening chamber will be gradually stratified into a mixed coal layer on the upper layer and a coal gangue layer on the lower layer under the push of the corresponding front end liquid pushing plate. The rear mixed coal layer will pass over the isolation frame and enter the second screening chamber under the push of the water flow, while the gangue layer will be in a suspended state under the push of the corresponding rear end liquid pushing plate, so it is easier to be pushed into the corresponding discharge flow channel by the water flow. The mixed coal layer entering the second screening chamber will be gradually stratified into a clean coal layer at the upper layer and a medium coal layer at the lower layer under the push of the corresponding front end liquid pushing plate, wherein the clean coal layer will be discharged from the terminal discharge port under the push of the water flow, while the medium coal layer will be in a suspended state under the push of the rear end liquid pushing plate, and will be more easily pushed into the corresponding discharge flow channel under the push of the water flow. Step three: When the gangue layer accumulates to a specified height in the first screening chamber, the operator discharges the gangue in the gangue layer, and when the middle coal layer accumulates to a specified height in the second screening chamber, the operator discharges the middle coal in the middle coal layer.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a coal washing jig washing machine and a method of using the same, which can utilize the front end liquid push plate to stratify the coal mine, utilize the rear end liquid push plate to enhance the fluidity of coal, coal gangue and coal mine, and can also utilize the discharge shaft to actively discharge coal gangue and medium coal, thereby effectively avoiding blockage and reducing water consumption during discharge and washing. Then, intermittent discharge of slag is achieved through a vibration device, a pressing device, a sealing device and a discharging device, and slag can be prevented from accumulating in the bottom cavity, so that no manual discharge or regular maintenance is required. This solves the problems of large water consumption, easy blockage and easy reduction of washing efficiency of the existing jig, and can effectively improve the working reliability and water-saving ability of the jig. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a side view of the structure of the present invention; Figure 3 It is a cross-sectional view of the internal structure of the main frame of the present invention; Figure 4 It is a cross-sectional view of the internal structure of the bottom shell of the present invention; Figure 5 It is a schematic diagram of the internal structure of the vibration device of the present invention; Figure 6 It is a schematic diagram of the structure of the sealing device of the present invention; Figure 7 It is a structural schematic diagram of the power device of the present invention; Figure 8 It is a structural schematic diagram of the material pushing device of the present invention; Fig. 9 It is a schematic diagram of the structure of the discharge shaft of the present invention; Fig.10 It is a schematic structural diagram of the material pressing device of the present invention.

[0018] In the figure: 1, main frame; 2, closing device; 201, closing plug; 202, bottom cover; 203, push rod; 204, push frame; 205, worm gear; 206, worm; 207, adjustment motor; 3, discharge shaft; 301, material trough; 302, support plate; 303, central shaft; 304, rubber sleeve; 4, pressing device; 401, pushing scraper; 402, central plate; 403, arc pressing end; 40 4. Arc-shaped feeding end; 5. Power device; 501. Top slide bar; 502. First drive motor; 503. First cam; 504. Bottom sleeve; 505. First return spring; 506. Bottom connecting plate; 6. Pushing device; 601. Auxiliary motor; 602. Moving seat; 603. Driving wheel; 604. Connecting arm; 605. Vertical pushing end; 606. Triangular pushing plate; 607. Inclined end; 7. Vibrating device; 701. Second return spring; 702. Center guide column; 703. Sliding sleeve; 704. Upper shell; 705. Second cam; 706. Ring frame; 707. Second drive motor; 708. Sealing rubber membrane; 709. Lower shell; 8. Storage device; 801. Feeding tube; 802. Storage tank; 803. Storage cavity; 9. Controller; 10. Mounting shell; 11. Bottom flow channel; 12. Bottom cavity; 13, rotating motor; 14, rear end liquid pushing plate; 15, front end liquid pushing plate; 16, first screen; 17, water inlet pipe; 18, feed port; 19, first screening cavity; 20, guide rail; 21, transparent observation window; 22, second screening cavity; 23, handle; 24, top cover; 25, end discharge port; 26, discharge motor; 27, discharge flow channel; 28, second screen; 29, isolation frame; 30, bottom shell. DETAILED DESCRIPTION

[0019] In order to clearly and completely describe the purpose and technical solution of the present invention, and to more clearly and clearly explain its advantages, the embodiments of the present invention are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Fig. 9The present invention provides a coal washing and selecting jig washing machine, comprising a main frame 1, a bottom shell 30 and a discharge shaft 3. The interior of the main frame 1 is divided into a second screening chamber 22 and a first screening chamber 19 by an isolation frame 29. The front end of the first screening chamber 19 is provided with a feeding port 18 for feeding and a water inlet pipe 17 for supplying water, and the rear end of the second screening chamber 22 is provided with a terminal discharge port 25 for discharging clean coal. A first screen 16 is provided in the first screening chamber 19, and a second screen 28 is provided in the second screening chamber 22. The water inlet pipe 17 is used to provide cleaning water. The water flow provided by the water inlet pipe 17 will flow from the first screening chamber 19 to the second screening chamber 22 and then be discharged from the end discharge port 25. The feed port 18 is used to continuously supply coal raw materials into the first screening chamber 19. The coal raw materials entering the first screening chamber 19 will also enter the second screening chamber 22 under the impetus of the water flow, and realize the coal washing in the process of coal transportation. In the process of coal raw material movement, the smaller particle size of the coal raw materials and slag components such as mud and sand inside the coal raw materials can pass through the first screen 16 or the second screen 28, so as to be screened out.

[0021] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The main frame 1 is provided with a bottom shell 30 for discharging slag at the bottom corresponding to the first screening chamber 19 and the second screening chamber 22. The bottom shell 30 is used to collect the slag screened by the first screen 16 and the second screen 28. The slag will gather in the bottom shell 30 and be cleaned up during subsequent maintenance. A mounting shell 10 is fixedly installed in the bottom shell 30, and a front end liquid pushing plate 15 corresponding to the front end of the first screening chamber 19 or the front end of the second screening chamber 22 is fixedly installed in the mounting shell 10, and the front end liquid pushing plate 15 is used to stratify the coal in the first screening chamber 19 or the second screening chamber 22 by vertically pushing the water flow. A rear end liquid pushing plate 14 corresponding to the rear end of the first screening chamber 19 or the rear end of the second screening chamber 22 is fixedly installed in the mounting shell 10, and the rear end liquid pushing plate 14 is used to float the medium coal or coal gangue located above the first screen 16 and the second screen 28 by vertically pushing the water flow. The rear end liquid pushing plate 14 and the front end liquid pushing plate 15 are both sealed with the mounting shell 10 by an isolation rubber membrane, and the mounting shell 10 and the bottom shell 30 are fixedly installed by bolts. The functions of the front end liquid pushing plate 15 and the rear end liquid pushing plate 14 are different. The front end liquid pushing plate 15 can provide a stronger upward moving force for the pushing flow, so that the density and particle size of the mud, coal, gangue and other components contained in the coal raw materials can be used to achieve stratification. The front end liquid pushing plate 15 located in the first screening chamber 19 is used to separate the coal raw materials into a mixed coal layer located in the upper layer and a gangue located in the lower layer, wherein the mixed coal layer will continue to be sent into the second screening chamber 22 by hydraulic power, and the gangue will gradually gather near the isolation frame 29 under the push of the water flow and the obstruction of the isolation frame 29. The front end liquid pushing plate 15 located in the second screening chamber 22 is used to separate the mixed coal layer entering the second screening chamber 22 into clean coal located in the upper layer and medium coal located in the lower layer, wherein the clean coal will be discharged from the terminal discharge port 25 driven by the water flow, and the medium coal will be sent to the position below the terminal discharge port 25 under the push of the water flow for convergence.The rear liquid pushing plate 14, by pushing and forming a smaller force but higher frequency vibration than the front liquid pushing plate 15, can make the gangue directly in contact with the first screen 16 or the medium coal directly in contact with the second screen 28 always in a suspended state under the water flow vibration pushed by the rear liquid pushing plate 14, and will not be accumulated on the first screen 16 or the second screen 28 under the action of gravity. In addition, since the vibration force is small and is not enough to remix the materials on the upper layer and the materials on the lower layer, the original stratified structure formed by the front liquid pushing plate 15 will not be destroyed. The structure of the ore bed can effectively prevent the minerals from being mixed together again and affecting the separation effect. However, after the minerals in the lower layer are suspended by this vibration, the friction force on the lower layer minerals can be effectively reduced, so that the lower layer minerals are pushed by the water flow from the front end to the rear end of the main frame 1. This can also effectively prevent the lower ore bed from affecting the slag passing through the first screen 16 or the second screen 28, thereby obtaining a better screening effect. And because the water flow only needs a lower flow rate to push the minerals forward, it can effectively save water in the entire screening process. And the front push plate 15 and the rear push plate 14 are directly installed at the bottom of the first screen 16 or the second screen 28, and the height from the liquid surface is shorter, so the water flow required to push is less, which can reduce the required power and save energy consumption.

[0022] See also Figure 4 and Figure 7, independent power devices 5 are used in the installation shell 10 to drive the rear end liquid pushing plate 14 and the front end liquid pushing plate 15 to move respectively, that is to say, each rear end liquid pushing plate 14 is driven by an independent power device 5, and each front end liquid pushing plate 15 is also driven by an independent power device 5, so that the vibration mode of the corresponding front end liquid pushing plate 15 or the rear end liquid pushing plate 14 can be independently adjusted by the corresponding power device 5, so as to adapt to the washing work of coal mine raw materials with different components. The power device 5 includes a top slide bar 501 fixedly mounted with the rear end liquid pushing plate 14 or the front end liquid pushing plate 15, and the top slide bar 501 is slidably mounted in the bottom sleeve 504, the bottom of the bottom sleeve 504 is fixedly mounted on the bottom connecting plate 506, and a first return spring 505 for driving the top slide bar 501 to slide downward is installed between the bottom connecting plate 506 and the top slide bar 501, the bottom connecting plate 506 is fixedly mounted with the mounting shell 10, and a first drive motor 502 is fixedly mounted on the bottom connecting plate 506, the output end of the first drive motor 502 drives the top slide bar 501 to move upward through the first cam 503, and the first drive motor 502 is electrically connected to the controller 9. Then, when the first drive motor 502 rotates, the first cam 503 will be driven by the first drive motor 502 to rotate together, so the top slide bar 501 can be lifted up by the protruding area of ​​the first cam 503, and when the protruding part of the first cam 503 is turned to the bottom, the top slide bar 501 will be pulled downward by the first return spring 505, so as to repeat the process to realize the up and down movement of the top slide bar 501, and when the top slide bar 501 moves up and down, it will also drive the front end liquid push plate 15 or the rear end liquid push plate 14 located thereon to move up and down, thereby driving the corresponding water flow to move up and down, so that the purpose of using the water flow to hold up the coal mine and realize the stratification can be realized. Since the power device 5 is built into the mounting shell 10, and the mounting shell 10 is arranged inside the bottom shell 30 and wrapped by the water flow, the heat emitted during the working process of the power device 5 can be absorbed by the water flow, so it also has a better heat dissipation effect, and the noise and vibration generated during the working process of the power device 5 can also be buffered and absorbed by the water flow, so the working noise of the whole device is smaller.

[0023] See also Figure 1 , Figure 3 and Fig. 9The main frame 1 is provided with a discharge channel 27 for discharging medium coal or coal gangue at the rear ends corresponding to the first screen 16 and the second screen 28, and a discharge shaft 3 is rotatably installed in the discharge channel 27 for discharging the medium coal or coal gangue by squeezing the medium coal or coal gangue during rotation. A discharge motor 26 for driving the discharge shaft 3 is fixedly installed on the main frame 1, and a controller 9 electrically connected to the power device 5 and the discharge motor 26 respectively is fixedly installed on the main frame 1. The discharge shaft 3 includes a central axis body 303 fixedly installed on the output end of the discharge motor 26, and at least four support plates 302 are arranged in a circular array on the central axis body 303, and a material trough 301 for accommodating medium coal or coal gangue is formed between the support plates 302, and the support plates 302 and the central axis body 303 are both wrapped with rubber sleeves 304, and the outer wall surface of the rubber sleeve 304 is sealed with the inner wall surface of the discharge channel 27. The discharge motor 26 is used to drive the discharge shaft 3 to rotate slowly. When the coal gangue or medium coal approaches the discharge shaft 3, it will be sent into the material trough 301 under the push of the water flow, and the water originally in the material trough 301 will be gradually squeezed and returned to the first screening chamber 19 or the second screening chamber 22. Then, the coal gangue or medium coal in the material trough 301 will be gradually transported to the outlet below the discharge channel 27 under the rotation of the rubber sleeve 304 and discharged. Since the rubber sleeve 304 fits the inner wall of the discharge channel 27, the water flow cannot directly pass over the discharge shaft 3 and be discharged. Moreover, since the material trough 301 can be filled with coal gangue or medium coal, only a small amount of water can be discharged each time the material is discharged, which can effectively avoid the loss of water flow and save water. Since the support plate 302 and the central axis 303 are both covered by the rubber sleeve 304, and the rubber sleeve 304 itself can be deformed after being subjected to force, the medium coal or coal gangue entering the material trough 301 can obtain sufficient accommodation space by squeezing the rubber sleeve 304 after being subjected to force, thereby preventing the medium coal or coal gangue from being directly stuck between the support plate 302 and the discharge channel 27, causing the discharge shaft 3 to be unable to rotate, or squeezing and deforming the discharge shaft 3, causing a large amount of water in the first screening chamber 19 or the second screening chamber 22 to be lost, thereby having higher working reliability and maintainability.

[0024] When the coal washing and jigging washing machine designed in this embodiment is in use, water is first injected into the first screening chamber 19 and the second screening chamber 22 through the water inlet pipe 17. At this time, the water will fill the corresponding bottom shell 30 and flow out through the end discharge port 25. Then, the coal raw materials are injected into the first screening chamber 19 through the feed port 18. At this time, the coal raw materials will gradually move from the front end of the main frame 1 to the rear end of the main frame 1 under the push of the water flow. Subsequently, the operator issues a beneficiation instruction through the controller 9. At this time, the controller 9 will control the power device 5 to drive the rear end liquid pushing plate 14 and the front end liquid pushing plate 15 to perform periodic up and down movements. The rear end liquid pushing plate 14 and the front end liquid pushing plate 15 will push the water flow above them and drive the coal in the water flow to vibrate up and down. During the vibration process, the slag with a smaller particle size that can pass through the first screen 16 and the second screen 28 will move downward to the inside of the bottom shell 30 and finally be discharged from the bottom of the bottom shell 30. The coal raw materials in the first screening chamber 19 will be gradually stratified into a mixed coal layer on the upper layer and a mixed coal layer on the lower layer under the push of the corresponding front end liquid pushing plate 15. The mixed coal layer will then pass through the isolation frame 29 and enter the second screening chamber 22 under the push of the water flow, while the gangue layer will be in a suspended state under the push of the corresponding rear end liquid pushing plate 14, so it is easier to be pushed into the corresponding discharge channel 27 by the water flow. The mixed coal layer entering the second screening chamber 22 will be gradually stratified into a clean coal layer at the upper layer and a middle coal layer at the lower layer under the push of the corresponding front end liquid pushing plate 15, wherein the clean coal layer will be discharged from the terminal discharge port 25 under the push of the water flow, while the middle coal layer will be in a suspended state under the push of the rear end liquid pushing plate 14, and will be more easily pushed into the corresponding discharge channel 27 under the push of the water flow. When the gangue layer accumulates to a specified height in the first screening chamber 19, the operator turns on the corresponding discharge motor 26, and uses the discharge motor 26 to drive the discharge shaft 3 corresponding to the first screening chamber 19 to discharge the gangue from the corresponding discharge channel 27. When the medium coal layer accumulates to a specified height in the second screening chamber 22, the operator turns on the corresponding discharge motor 26, and drives the discharge shaft 3 corresponding to the second screening chamber 22 to discharge the medium coal from the corresponding discharge channel 27. This solves the problems of large water consumption, easy clogging, and easy reduction of washing efficiency of the existing jig, and can effectively improve the working reliability and water-saving ability of the jig.

[0025] Example 2: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8On the basis of the first embodiment, a top cover 24 for sealing the main frame 1 is fixedly installed on the top of the main frame 1, and the top cover 24 is used to prevent water or coal in the first screening chamber 19 and the second screening chamber 22 from splashing out. A handle 23 for conveniently opening the top cover 24 is fixedly installed on the top cover 24, and a transparent observation window 21 for conveniently observing the working conditions in the first screening chamber 19 and the second screening chamber 22 is fixedly installed on the top cover 24. A guide rail 20 is fixedly installed on the top cover 24 along the front and rear directions, and a pushing device 6 for pushing the coal movement is provided on the guide rail 20, and the pushing device 6 includes a moving seat 602 slidably installed on the guide rail 20, and an auxiliary device electrically connected to the controller 9 is fixedly installed on the moving seat 602 The motor 601 and the output end of the auxiliary motor 601 drive a driving wheel 603, a rack meshing with the driving wheel 603 is arranged on the guide rail 20, and a connecting arm 604 is arranged below the movable seat 602, and a triangular push plate 606 for scraping the upper surface of the first screen 16 or the upper surface of the second screen 28 is arranged below the connecting arm 604, and the triangular push plate 606 is provided with a vertical pushing end 605 for pushing the coal gangue or medium coal on the first screen 16 or the second screen 28 into the discharge channel 27 in the direction toward the rear end of the main frame 1, and the triangular push plate 606 is provided with an inclined end 607 for shoveling up the coal gangue or medium coal on the first screen 16 or the second screen 28 in the direction toward the front end of the main frame 1. The triangular push plate 606 can move back and forth along the guide rail 20 driven by the auxiliary motor 601, so as to scrape and brush the upper end of the first screen 16 or the second screen 28, thereby effectively preventing the residue from adhering to the first screen 16 or the second screen 28 and clogging the first screen 16 and the second screen 28. At the same time, the connecting arm 604 itself can also scrape and brush the inner wall of the first screening chamber 19 or the second screening chamber 22, thereby ensuring that the residue cannot gather and clump inside the main frame 1, avoiding the problem of reduced screening efficiency due to blockage.When the triangular push plate 606 moves from the front end of the main frame 1 to the rear end of the main frame 1, since the vertical push end 605 has a height of at least two centimeters, the vertical push end 605 can be used to directly push the gangue or medium coal located in the lower layer to move toward the discharge flow channel 27, thereby assisting the gangue or medium coal to be discharged by the discharge shaft 3. When the triangular push plate 606 moves from the rear end of the main frame 1 to the front end of the main frame 1, since the medium coal or gangue can float upward for a certain distance under the push of the front push plate 15 and the rear push plate 14, the inclined end 607 can be inserted into the medium coal. Or the bottom of the gangue, so that it can pass normally, and the horizontal movement applied by the inclined end 607 to the medium coal or the gangue will also be offset by the flow of water, so that the layered structure of the coal bed can be not destroyed, so that the discharge of the medium coal and the gangue can be assisted on the premise of ensuring the normal layered separation of the coal mine, avoiding the medium coal and the gangue from being unable to be discharged normally and requiring manual cleaning, and also avoiding the impurities such as slag mixed in the medium coal and the gangue from accumulating on the top of the first screen 16 or the second screen 28 to affect the normal washing work, thereby improving the reliability and washing efficiency of the equipment. Further solve the problems of large water consumption, easy clogging, and easy reduction of washing efficiency of the existing jig, which can effectively improve the working reliability and water-saving ability of the jig.

[0026] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5On the basis of the second embodiment, a bottom cavity 12 is formed between the bottom of the mounting shell 10 and the bottom of the bottom shell 30, and a bottom flow channel 11 for connecting the bottom of the first screening cavity 19 or the bottom of the second screening cavity 22 with the bottom cavity 12 is formed between the side of the mounting shell 10 and the side of the bottom shell 30. Since the front end liquid pushing plate 15 and the rear end liquid pushing plate 14 will continuously move up and down, the slag that has passed through the first screen 16 or the second screen 28 will be vibrated to move through the bottom flow channel 11 into the bottom cavity 12. A vibration device 7 for vibrating the water flow in the bottom cavity 12 is provided in the bottom cavity 12. The vibration device 7 includes an upper shell 704 mounted on the bottom of the mounting shell 10, and the bottom of the upper shell 704 is fixed by a central guide column 702. A lower shell 709 is installed, a sliding sleeve 703 is slidably installed on the central guide column 702, and a ring frame 706 for promoting water flow is fixedly installed on the outer side of the sliding sleeve 703, a sealing rubber membrane 708 for isolating water flow is fixedly installed between the outer side of the upper shell 704 and the outer side of the lower shell 709, and the sealing rubber membrane 708 is fixedly installed on the outside of the ring frame 706, a second driving motor 707 is fixedly installed on the lower shell 709, and the output end of the second driving motor 707 drives the sliding sleeve 703 to move upward along the central guide column 702 through the second cam 705, and a second reset spring 701 for driving the sliding sleeve 703 to reset downward is fixedly installed between the sliding sleeve 703 and the lower shell 709, and the second driving motor 707 is electrically connected to the controller 9. When the second drive motor 707 rotates, the sliding sleeve 703 will be lifted up through the protrusion of the cam, and then when the protrusion of the cam rotates to other positions, the sliding sleeve 703 can move downward through the pulling of the second return spring 701, so that the sliding sleeve 703 can achieve periodic up and down movement, and the sliding sleeve 703 can drive the annular frame 706 and the sealing rubber film 708 to vibrate up and down, so that the water flow in the bottom cavity 12 can vibrate up and down periodically, so that the slag in the water flow can be prevented from staying in the same place for a long time to cause backlog, adhesion, blockage and other problems, which is convenient for the subsequent discharge of the slag and reduces the trouble of manual cleaning and maintenance. It further solves the problems of large water consumption, easy blockage and easy reduction of washing efficiency of the existing jig, and can effectively improve the working reliability and water-saving ability of the jig.

[0027] Example 4: Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 and Fig.10On the basis of the third embodiment, a storage device 8 for collecting slag is provided at the bottom of the bottom shell 30, and the storage device 8 includes a storage tank 802 fixedly mounted on the bottom shell 30, and the storage tank 802 is provided with a storage cavity 803 connected to the bottom cavity 12 and used to store slag, and a closing device 2 for closing the storage cavity 803 is fixedly mounted on the bottom of the bottom shell 30, and the closing device 2 includes a push rod 203 fixedly mounted on the bottom shell 30, and the output end of the push rod 203 drives a pushing frame 204 that moves up and down, and a direction adjustment motor 207 is fixedly mounted on the pushing frame 204, and the output end of the direction adjustment motor 207 drives a worm 206, and the output end of the pushing frame 204 drives a bottom cover 202 for closing the bottom of the storage cavity 803, and the rotation of the bottom cover 202 A worm wheel 205 meshing with the worm 206 is fixedly mounted on the shaft, and a closing plug 201 inserted into the storage chamber 803 to prevent the bottom cover 202 from rotating is fixedly mounted on the top of the bottom cover 202. The push rod 203 and the adjustment motor 207 are both electrically connected to the controller 9. When it is necessary to discharge the material residue inside the storage chamber 803, the bottom cover 202 is first driven downward by the push rod 203 so that the closing plug 201 is pulled out of the storage chamber 803. Then, the inclination angle of the bottom cover 202 is changed by the adjustment motor 207, so that the material in the storage chamber 803 can be discharged normally. The push rod 203 can use a hydraulic push rod, and the worm gear mechanism composed of the worm wheel 205 and the worm 206 also has a self-locking function to keep the bottom cover 202 at a specified inclination angle. When the material storage chamber 803 needs to be closed by the closing device 2, the bottom cover 202 is first adjusted to a horizontal state by the direction adjustment motor 207, and then the closing plug 201 is inserted into the material storage chamber 803 under the drive of the push rod 203. The closing plug 201 and the bottom cover 202 are both hard plates wrapped with an impermeable rubber film, so that water and material residue can be prevented from leaking out of the material storage chamber 803. The use of the closing device 2 to control the discharge of the material storage device 8 can achieve intermittent discharge without having to make the water flow out of the bottom chamber 12 all the time, thereby reducing the water consumption during discharge.An annular flow channel is formed at the bottom of the bottom cavity 12, and the annular flow channel is connected to the storage cavity 803 through at least one discharge pipe 801. A rotating motor 13 electrically connected to the controller 9 is fixedly installed at the center of the corresponding annular flow channel of the bottom shell 30, and the rotating motor 13 is used to drive the pressing device 4 located in the annular flow channel to rotate. The pressing device 4 includes a center plate 402 coaxially fixedly installed with the output shaft of the rotating motor 13, and a push scraper 401 for closing the upper end of the discharge pipe 801 and scraping the inner wall of the bottom cavity 12 is fixedly installed on the center plate 402, one side of the push scraper 401 is integrally formed with an arc-shaped pressing end 403 for pressing the slag into the discharge pipe 801, and the other end of the push scraper 401 is integrally formed with an arc-shaped feeding end 404 for guiding the slag into the arc-shaped pressing end 403 below. The slag in the bottom cavity 12 will be gradually stratified under the vibration of the vibration device 7, so that the slag with larger mass can enter the arc-shaped pressing end 403 along the arc-shaped feeding end 404. When the pushing scraper 401 rotates, the arc-shaped pressing end 403 will form a downward extrusion force. The slag with larger mass will be gradually sent to the bottom of the arc-shaped pressing end 403 under the dual action of the extrusion force and the centrifugal force, while the water with lighter mass will be squeezed out of the bottom of the arc-shaped pressing end 403 by the slag. When the arc-shaped pressing end 403 moves to the position corresponding to the discharge pipe 801, the arc-shaped pressing end 403 presses the slag into the discharge pipe 801 and stores it in the storage cavity 803, while the water flow originally in the storage cavity 803 is squeezed back into the bottom cavity 12. In this way, the slag in the bottom cavity 12 can be gradually sent into the storage cavity 803 to wait for discharge, and the pressing device 4 itself The body of the material pressing device 4 can also scrape and brush the inner wall of the bottom cavity 12, so as to prevent the slag from blocking the bottom cavity 12. On the other hand, since the material pressing device 4 also realizes two functions, on the one hand, the upper end of the feeding tube 801 can be closed by the bottom of the material pushing scraper 401, so that when the storage cavity 803 needs to discharge, the water flow in the bottom cavity 12 can be prevented from flowing out by first closing the feeding tube 801 with the material pushing scraper 401, thereby reducing the waste of water flow. On the other hand, the slag is pressed into the storage cavity 803 by the material pressing device 4, and compared with the traditional method of using gravity and water pressure to discharge the slag, a greater driving force can be obtained for the slag, so there is no need to worry about the slag blocking the feeding tube 801 and the storage cavity 803. Even if the storage device 8 is blocked, the bottom cover 202 can be directly opened to quickly clean it from the bottom of the storage cavity 803 without affecting the normal operation of the jig washing machine. Therefore, it is more convenient to use. The invention further solves the problems of large water consumption, easy clogging and low washing efficiency of the existing jig, and can effectively improve the working reliability and water-saving ability of the jig.

[0028] Embodiment 5: Based on Embodiment 4, the present invention further provides a method for using a jig washing machine for coal washing, comprising the following steps: Step 1: When in use, firstly, water is injected into the first screening chamber 19 and the second screening chamber 22 through the water inlet pipe 17. At this time, the water will fill the corresponding bottom shell 30 and flow out through the end discharge port 25. Then, the coal raw material is injected into the first screening chamber 19 through the feed port 18. At this time, the coal raw material will gradually move from the front end of the main frame 1 to the rear end of the main frame 1 under the impetus of the water flow; Step 2: The operator then issues a beneficiation instruction through the controller 9. At this time, the controller 9 will control the power device 5 to drive the rear end liquid pushing plate 14 and the front end liquid pushing plate 15 to perform periodic up and down movements. The rear end liquid pushing plate 14 and the front end liquid pushing plate 15 will push the water flow above them and drive the coal in the water flow to vibrate up and down. During the vibration process, the slag with a smaller particle size that can pass through the first screen 16 and the second screen 28 will move downward to the inside of the bottom shell 30 and finally be discharged from the bottom of the bottom shell 30. The coal raw materials in the first screening chamber 19 will be gradually stratified into a mixed coal layer on the upper layer and a coal gangue layer on the lower layer under the push of the corresponding front end liquid pushing plate 15. Then the mixed coal layer will pass over the isolation frame 29 under the push of the water flow and enter the second In the screening chamber 22, the gangue layer is in a suspended state under the push of the corresponding rear end liquid pushing plate 14, so that it is easier to be pushed into the corresponding discharge channel 27 by the water flow. The mixed coal layer entering the second screening chamber 22 will be gradually stratified into a clean coal layer at the upper layer and a middle coal layer at the lower layer under the push of the corresponding front end liquid pushing plate 15, wherein the clean coal layer will be discharged from the terminal discharge port 25 under the push of the water flow, while the middle coal layer will be in a suspended state under the push of the rear end liquid pushing plate 14, and will be more easily pushed into the corresponding discharge channel 27 under the push of the water flow. At the same time, the slag passing through the first screen 16 or the second screen 28 will be transported to the storage chamber 803 under the joint action of the vibration device 7 and the pressing device 4, and finally discharged by opening the bottom cover 202; Step three: When the gangue layer accumulates to a specified height in the first screening chamber 19, the operator turns on the corresponding discharge motor 26, and uses the discharge motor 26 to drive the discharge shaft 3 corresponding to the first screening chamber 19 to discharge the gangue from the corresponding discharge channel 27. When the medium coal layer accumulates to a specified height in the second screening chamber 22, the operator turns on the corresponding discharge motor 26, and drives the discharge shaft 3 corresponding to the second screening chamber 22 to discharge the medium coal from the corresponding discharge channel 27. At the same time, the triangular push plate 606 will send the gangue on the first screen 16 or the medium coal on the second screen 28 into the corresponding discharge channel 27 to facilitate the discharge of the discharge shaft 3.

[0029] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A coal washing machine using a jig, characterized in that: include: A main frame (1), the interior of the main frame (1) being divided into a second screening chamber (22) and a first screening chamber (19) by an isolation frame (29), the front end of the first screening chamber (19) being provided with a feed port (18) for feeding materials and a water inlet pipe (17) for supplying water, and the rear end of the second screening chamber (22) being provided with a terminal discharge port (25) for discharging clean coal, the first screening chamber (19) being provided with a first screen (16), and the second screening chamber (22) being provided with a second screen (28); A bottom shell (30), wherein the main frame (1) is provided with a bottom shell (30) for discharging slag at the bottom corresponding to the first screening chamber (19) and the second screening chamber (22), and a mounting shell (10) is fixedly installed in the bottom shell (30), and a front end liquid pushing plate (15) corresponding to the front end of the first screening chamber (19) or the front end of the second screening chamber (22) is fixedly installed in the mounting shell (10), and the front end liquid pushing plate (15) is used to push the water flow vertically so that the first screening chamber (19) or a coal mine layer in a second screening chamber (22), a rear end liquid pushing plate (14) corresponding to the rear end of the first screening chamber (19) or the rear end of the second screening chamber (22) is fixedly installed in the installation shell (10), and the rear end liquid pushing plate (14) is used to float the medium coal or coal gangue located above the first screen (16) and the second screen (28) by vertically pushing water flow, and a power device (5) for driving the front end liquid pushing plate (15) and the rear end liquid pushing plate (14) to move vertically is arranged in the bottom shell (30).

2. A jigging washing machine for coal washing according to claim 1, characterized in that: A top cover (24) for sealing the main frame (1) is fixedly mounted on the top of the main frame (1), and the top cover (24) is used to prevent water or coal in the first screening chamber (19) and the second screening chamber (22) from splashing out. A handle (23) for conveniently opening the top cover (24) is fixedly mounted on the top cover (24), and a transparent observation window (21) for conveniently observing the working conditions in the first screening chamber (19) and the second screening chamber (22) is fixedly mounted on the top cover (24). Discharge channels (27) for discharging medium coal or coal gangue are provided at the rear ends of the first screen (16) and the second screen (28), and a discharge shaft (3) is rotatably installed in the discharge channel (27) for discharging the medium coal or coal gangue by squeezing the medium coal or coal gangue during rotation. A discharge motor (26) for driving the discharge shaft (3) is fixedly installed on the main frame (1), and a controller (9) electrically connected to the power device (5) and the discharge motor (26) is fixedly installed on the main frame (1).

3. A jigging washing machine for coal washing according to claim 2, characterized in that: A guide rail (20) is fixedly mounted on the top cover (24) along the front-to-back direction, and a pushing device (6) for pushing the coal mine is arranged on the guide rail (20), the pushing device (6) comprises a moving seat (602) slidably mounted on the guide rail (20), and an auxiliary motor (601) electrically connected to the controller (9) is fixedly mounted on the moving seat (602), an output end of the auxiliary motor (601) drives a driving wheel (603), a rack meshing with the driving wheel (603) is arranged on the guide rail (20), and a connecting arm (604) is arranged below the moving seat (602), the connecting arm (604) is arranged at the bottom of the moving seat (602), and the connecting arm (604) is arranged at the bottom of the moving seat (602). A triangular push plate (606) for scraping the upper surface of the first screen (16) or the upper surface of the second screen (28) is provided below the arm (604); the triangular push plate (606) is provided with a vertical push end (605) in the direction toward the rear end of the main frame (1) for pushing the gangue or medium coal on the first screen (16) or the second screen (28) into the discharge channel (27); and the triangular push plate (606) is provided with an inclined end (607) in the direction toward the front end of the main frame (1) for shoveling up the gangue or medium coal on the first screen (16) or the second screen (28).

4. A jigging washing machine for coal washing according to claim 2, characterized in that: The discharge shaft (3) comprises a central shaft (303) fixedly mounted to the output end of the discharge motor (26), and at least four support plates (302) are arranged on the central shaft (303) in a circular array, and a material trough (301) for accommodating medium coal or coal gangue is formed between the support plates (302), and the support plates (302) and the central shaft (303) are both wrapped with a rubber sleeve (304), and the outer wall surface of the rubber sleeve (304) is in close contact and sealing with the inner wall surface of the discharge flow channel (27).

5. A jigging washing machine for coal washing according to claim 1, characterized in that: The rear end liquid pushing plate (14) and the front end liquid pushing plate (15) are both sealed with the mounting housing (10) via an isolation rubber membrane, and the mounting housing (10) and the bottom housing (30) are fixedly mounted via bolts.

6. A jigging washing machine for coal washing according to claim 1, characterized in that: An independent power device (5) is used in the installation shell (10) to drive the rear end liquid pushing plate (14) and the front end liquid pushing plate (15) to move respectively, and the power device (5) includes a top slide bar (501) fixedly mounted on the rear end liquid pushing plate (14) or the front end liquid pushing plate (15), and the top slide bar (501) is slidably mounted in the bottom sleeve (504), the bottom of the bottom sleeve (504) is fixedly mounted on the bottom connecting plate (506), and a first return spring (505) is installed between the bottom connecting plate (506) and the top slide bar (501) for driving the top slide bar (501) to slide downward, the bottom connecting plate (506) is fixedly mounted on the installation shell (10), and a first drive motor (502) is fixedly mounted on the bottom connecting plate (506), and the output end of the first drive motor (502) drives the top slide bar (501) to move upward through a first cam (503).

7. A jigging washing machine for coal washing according to claim 1, characterized in that: A bottom cavity (12) is formed between the bottom of the mounting shell (10) and the bottom of the bottom shell (30), and a bottom flow channel (11) for connecting the bottom of the first screening chamber (19) or the bottom of the second screening chamber (22) with the bottom cavity (12) is formed between the side of the mounting shell (10) and the side of the bottom shell (30). A vibration device (7) for vibrating a water flow in the bottom cavity (12) is arranged in the bottom cavity (12). The vibration device (7) comprises an upper shell (704) mounted on the bottom of the mounting shell (10), and a lower shell (709) is fixedly mounted on the bottom of the upper shell (704) via a central guide column (702), and a sliding sleeve (709) is slidably mounted on the central guide column (702). 3), and an annular frame (706) for pushing water flow is fixedly installed on the outer side of the sliding sleeve (703), a sealing rubber membrane (708) for isolating water flow is fixedly installed between the outer side of the upper shell (704) and the outer side of the lower shell (709), and the sealing rubber membrane (708) is fixedly installed on the outer side of the annular frame (706), a second driving motor (707) is fixedly installed on the lower shell (709), and the output end of the second driving motor (707) drives the sliding sleeve (703) to move upward along the central guide column (702) through a second cam (705), and a second return spring (701) for driving the sliding sleeve (703) to return downward is fixedly installed between the sliding sleeve (703) and the lower shell (709).

8. A jigging washing machine for coal washing according to claim 7, characterized in that: A storage device (8) for collecting slag is provided at the bottom of the bottom shell (30), the storage device (8) comprising a storage tank (802) fixedly mounted on the bottom shell (30), and a storage cavity (803) communicating with the bottom cavity (12) and used for storing slag is provided inside the storage tank (802), a closing device (2) for closing the storage cavity (803) is fixedly mounted on the bottom of the bottom shell (30), and the closing device (2) comprises a push rod (203) fixedly mounted on the bottom shell (30), and an output end of the push rod (203) is driven to move up and down. A movable pushing frame (204) is provided, and a direction-adjusting motor (207) is fixedly mounted on the pushing frame (204); the output end of the direction-adjusting motor (207) drives a worm (206), and the output end of the pushing frame (204) drives a bottom cover (202) for sealing the bottom of a material storage chamber (803); a worm wheel (205) meshing with the worm (206) is fixedly mounted on the rotating shaft of the bottom cover (202), and a closing plug (201) inserted into the material storage chamber (803) for preventing the bottom cover (202) from rotating is fixedly mounted on the top of the bottom cover (202).

9. A jigging washing machine for coal washing according to claim 8, characterized in that: An annular flow channel is formed at the bottom of the bottom cavity (12), and the annular flow channel is connected to the material storage cavity (803) via at least one material discharge pipe (801). A rotating motor (13) electrically connected to the controller (9) is fixedly installed at the center of the corresponding annular flow channel in the bottom shell (30), and the rotating motor (13) is used to drive a material pressing device (4) located in the annular flow channel to rotate. The material pressing device (4) includes a central fixed device coaxially installed with an output shaft of the rotating motor (13). A core plate (402) is provided, and a material pushing scraper (401) is fixedly mounted on the center plate (402) for closing the upper end of the material discharge pipe (801) and scraping the inner wall of the bottom cavity (12); one side of the material pushing scraper (401) is integrally formed with an arc-shaped pressing end (403) for pressing the material residue into the material discharge pipe (801); and the other end of the material pushing scraper (401) is integrally formed with an arc-shaped feeding end (404) for guiding the material residue into the lower side of the arc-shaped pressing end (403).

10. A method for using a jig washer for coal washing as claimed in claim 9, characterized in that: The following steps are involved: Step 1: When in use, firstly, water is injected into the first screening chamber (19) and the second screening chamber (22) through the water inlet pipe (17). At this time, the water will fill the corresponding bottom shell (30) and flow out through the end discharge port (25). Then, the coal raw material is injected into the first screening chamber (19) through the feed port (18). At this time, the coal raw material will gradually move from the front end of the main frame (1) to the rear end of the main frame (1) under the impetus of the water flow; Step 2: The operator then controls the power device (5) to drive the rear liquid pushing plate (14) and the front liquid pushing plate (15) to perform periodic up and down movements. The rear liquid pushing plate (14) and the front liquid pushing plate (15) will push the water flow above them and drive the coal in the water flow to vibrate up and down. During the vibration process, the slag with a smaller particle size that can pass through the first screen (16) and the second screen (28) will move downward to the inside of the bottom shell (30) and eventually be discharged from the bottom of the bottom shell (30). The coal raw materials in the first screening chamber (19) will be gradually stratified into a mixed coal layer at the upper layer and coal gangue at the lower layer under the push of the corresponding front liquid pushing plate (15). The mixed coal layer will then pass through the isolation frame (29) under the push of the water flow and enter the second screening chamber (22), while the gangue layer will be in a suspended state under the push of the corresponding rear end liquid pushing plate (14) so ​​as to be more easily pushed by the water flow into the corresponding discharge flow channel (27). The mixed coal layer entering the second screening chamber (22) will be gradually separated into a clean coal layer at the upper layer and a middle coal layer at the lower layer under the push of the corresponding front end liquid pushing plate (15), wherein the clean coal layer will be discharged from the end discharge port (25) under the push of the water flow, while the middle coal layer will be in a suspended state under the push of the rear end liquid pushing plate (14) and will be more easily pushed into the corresponding discharge flow channel (27) under the push of the water flow; Step three: When the gangue layer accumulates to a specified height in the first screening chamber (19), the operator discharges the gangue in the gangue layer, and when the middle coal layer accumulates to a specified height in the second screening chamber (22), the operator discharges the middle coal in the middle coal layer.

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