Dehydration device for coal washer

Abstract

The invention provides a dehydration device for a coal washer. The dehydration device comprises a dehydration assembly, and the dehydration assembly comprises an operation frame, an annular fixing plate, a plurality of springs, a conical operation box, a vibration air inlet mechanism, a spiral plate, a cylinder and a liquid discharge pipe; the vibration air inlet mechanism drives the annular fixing plate to vibrate, meanwhile, the vibration air inlet mechanism is used for injecting air into the spiral exhaust cavity in the spiral plate, the annular fixing plate is used for assisting the conical operation box like a vibrating screen through the spring, and the conical operation box drives coal briquettes on the spiral plate to slightly float; water in the coal briquettes is filtered into a spiral water guide cavity through liquid inlet filtering holes, then gas in a spiral exhaust cavity is conveyed into the coal briquettes on the spiral plate through exhaust holes, the coal briquettes can be dried, the water can be assisted into the liquid inlet filtering holes, and the coal briquettes can be conveyed into the spiral water guide cavity through the exhaust holes. And the drying efficiency and the drying effect of the coal briquettes are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary devices of coal dehydration equipment, in particular to a dehydration device for a coal washer. Background Art

[0002] First, the coal slime water is pre-concentrated to reduce the water volume and increase the coal slime content. Then, flocculants are added to the coal slime water to make the fine coal powder and mineral particles agglomerate into larger flocs for subsequent separation. Then, a coal washer (such as a vacuum filter, filter press, centrifuge, etc.) is used to separate the solid and liquid to separate the coal slime from the water. The separated wet coal slime is then dried to obtain finished coal that can be sold.

[0003] For example, the application publication number is CN217737833U, a dewatering device for a coal washing machine, wherein a first sieve plate and a second sieve plate are respectively installed inside the dewatering machine, and the first sieve plate and the second sieve plate are fixedly connected to the dewatering machine by fastening screws, the first sieve plate and the second sieve plate are staggered, a feed hopper is installed above the dewatering machine, and the feed hopper and the dewatering machine are fixedly connected by fastening screws, a drainage hopper is provided below the dewatering machine, and the drainage hopper and the dewatering machine are arranged as an integrated structure, water permeable holes are provided on the surfaces of the first sieve plate and the second sieve plate, a vibration spring is installed above the support seat, the support seat and the connecting legs are fixedly connected to the vibration spring by fastening screws, an outer protective shell is installed on one side of the dewatering machine, and the outer protective shell is fixedly connected to the dewatering machine by fastening screws.

[0004] The advantages of the above application are: through the arrangement of the first sieve plate and the second sieve plate, water permeable holes are arranged on the surfaces of the first sieve plate and the second sieve plate, and the first sieve plate and the second sieve plate are staggered. The two sieve plates have the same structure. The coal blocks move above the two, and water is filtered through the water permeable holes, thereby separating the coal blocks from the water to achieve dehydration. The coal blocks slide alternately between multiple first sieve plates and second sieve plates, and dehydration can be achieved only under the action of gravity, without the need for centrifugation, thereby achieving more efficient dehydration and improving dehydration efficiency. And through the setting of the vibration spring, the dehydrator is connected to the support seat through the connecting legs and the vibration spring. When the dehydrator is used to dehydrate the coal blocks, it can vibrate continuously under the drive of the motor and the vibration spring, just like a vibrating screen, so that the coal blocks can float slightly, so that the moisture between the coal blocks can flow out, thereby improving the dehydration effect. However, the dehydration effect is poor and the surface of the coal blocks cannot be dried. When water slides on the screen plate, the residual water will move with the coal blocks due to the excessively fast water flow rate, and when the coal blocks filter water, the filtered water will repeatedly flow to the coal blocks on the lower filter screen, resulting in reduced dehydration efficiency. For this reason, a dehydration device for a coal washing machine is proposed. Summary of the Invention

[0005] In view of this, an embodiment of the present invention hopes to provide a dehydration device for a coal washer to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: a dehydration device for a coal washer includes a dehydration component, the dehydration component includes an operating frame, an annular fixing plate, a plurality of springs, a conical operating box, a vibrating air intake mechanism, a spiral plate, a circular cylinder and a drain pipe, wherein the upper surface of the operating frame is provided with a circular operating through hole, and the conical operating box passes through the circular operating through hole; the annular fixing plate is arranged on the outer wall of the conical operating box, and the top ends of the plurality of springs are evenly arranged on the lower surface of the annular fixing plate, and the bottom ends of the plurality of springs are evenly arranged on the upper surface of the operating frame; the spiral plate is arranged on the conical operating The inner wall of the box, and the circular cylinder is arranged on the inner wall of the spiral plate; the inner wall of the spiral plate is respectively provided with a spiral water guide chamber and a spiral exhaust chamber, and the spiral water guide chamber is arranged above the spiral exhaust chamber; the inner top wall of the spiral water guide chamber is evenly provided with liquid inlet filter holes, and the inner bottom wall of the spiral exhaust chamber is evenly provided with exhaust holes; the vibration air intake mechanism is arranged on the annular fixed plate, the conical operation box and the spiral plate; the drain pipe passes through the conical operation box and the spiral plate in sequence, and the drain pipe is fixedly connected to the conical operation box and the spiral plate, and the drain pipe is communicated with the spiral water guide chamber.

[0007] Optionally, the vibration air intake mechanism includes a servo motor, a movable cylinder, a crescent-shaped eccentric block, an incomplete gear, two racks, a plurality of fixed rods, a piston, a first one-way valve and a second one-way valve, wherein the lower surface of the servo motor is provided with a mounting plate, the mounting plate is arranged on the outer wall of the annular fixed plate, and one side of the crescent-shaped eccentric block is arranged on the output shaft of the servo motor; one side of the movable cylinder is slidably connected to the outer wall of the conical operating box, and a movable groove is opened on the other side of the movable cylinder; the two racks are symmetrically arranged on the inner wall of the movable groove, and the outer wall of the incomplete gear intermittently meshes with the adjacent side of the two racks, and the incomplete gear is arranged on the other side of the crescent-shaped eccentric block; the bottom ends of the plurality of fixed rods are evenly arranged on the upper surface of the annular fixed plate, The top ends of several of the fixed rods are evenly arranged on the lower surface of the piston, and the outer wall of the piston fits against the inner wall of the movable cylinder; the upper surface of the movable cylinder is respectively penetrated by an intake pipe and a first exhaust pipe, and the intake pipe and the first exhaust pipe are both connected to the interior of the movable cylinder, the intake pipe and the first exhaust pipe are fixedly connected to the movable cylinder, and the first one-way valve is arranged on the outer wall of the intake pipe; the top end of the first exhaust pipe is provided with a bellows, and the top end of the bellows is provided with a second exhaust pipe, and the second one-way valve is arranged on the outer wall of the second exhaust pipe; one end of the second exhaust pipe passes through the conical operating box and the spiral plate in sequence, and the second exhaust pipes are fixedly connected to the conical operating box and the spiral plate, and the second exhaust pipe is connected to the exhaust hole.

[0008] Optionally, shielding strips are evenly arranged on the upper surface of the spiral plate.

[0009] Optionally, a rubber sealing ring is embedded in the outer wall of the piston, and the outer wall of the rubber sealing ring is in contact with the inner wall of the movable cylinder.

[0010] Optionally, the outer wall of the conical operating box is evenly provided with a slide groove, and a slider is evenly provided on one side of the movable cylinder, and the outer wall of the slider is slidably connected to the inner wall of the slide groove.

[0011] Optionally, a feeding funnel is provided on the upper surface of the conical operating box.

[0012] Optionally, a conical dispersion block is provided at the top of the circular cylinder.

[0013] Optionally, a control panel is provided on the front surface of the operating frame, and the control panel is electrically connected to the servo motor via an electric wire.

[0014] The embodiment of the present invention adopts the above technical solution, which has the following advantages: 1. The present invention drives the annular fixed plate to vibrate through the vibrating air intake mechanism, and the vibrating air intake mechanism is used to inject air into the spiral exhaust chamber on the spiral plate. The annular fixed plate is used to assist the conical operating box through the spring like a vibrating screen. The conical operating box drives the coal blocks on the spiral plate to float slightly, so that the coal blocks vibrate and slide on the spiral plate. The water in the coal blocks is filtered into the spiral water guide chamber through the liquid inlet filter hole. Thereafter, the gas in the spiral exhaust chamber is transmitted to the coal blocks on the spiral plate through the exhaust hole, which can not only dry the coal blocks, but also assist the water to enter the liquid inlet filter hole, thereby improving the drying efficiency and drying effect of the coal blocks.

[0015] 2. The present invention drives the crescent-shaped eccentric block to rotate through the output shaft of the servo motor. While the crescent-shaped eccentric block drives the incomplete gear to rotate, the crescent-shaped eccentric block drives the servo motor and the annular fixed plate to vibrate. The incomplete gear intermittently engages on the two racks, thereby driving the movable cylinder to move up and down on the conical operating box. When the movable cylinder moves upward, the air intake pipe draws external gas into the movable cylinder. When the movable cylinder moves downward, the gas in the movable cylinder is transmitted to the spiral exhaust chamber through the first exhaust pipe, the bellows and the second exhaust pipe. The second one-way valve and the first one-way valve are used to control the air intake direction of the second exhaust pipe and the air intake pipe, which are used to ensure the vibration direction of the coal blocks in the conical operating box while ensuring the gas transmitted for drying the coal blocks, reducing the use cost and improving the drying efficiency and drying effect of the coal blocks.

[0016] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 It is a structural diagram of the present invention; Figure 2 It is a structural diagram of the side view of the present invention; Figure 3 For the present invention Figure 2 AA side cross-sectional structure diagram; Figure 4 For the present invention Figure 3 A magnified structural diagram of area B; Figure 5 For the present invention Figure 3 The enlarged structure of the C region; Figure 6 For the present invention Figure 3 A magnified structural diagram of the D region; Figure 7 For the present invention Figure 3 A magnified structural diagram of the E region; Figure 8 This is a structural diagram of the vibration intake mechanism of the present invention; Figure 9 This is a structural diagram of the connection between the spiral plate and the shielding strip of the present invention.

[0019] Reference numerals: 1, dehydration assembly; 2, feed funnel; 3, control panel; 4, mounting plate; 5, circular operating through hole; 6, movable groove; 7, air inlet pipe; 8, first exhaust pipe; 9, bellows; 10, operating frame; 11, annular fixing plate; 12, spring; 13, conical operating box; 14, vibration air inlet mechanism; 15, spiral plate; 16, circular cylinder; 17, drain pipe; 20, chute; 21, slider; 22, Rubber sealing ring; 23. Shielding strip; 24. Second exhaust pipe; 25. Spiral water guide chamber; 26. Spiral exhaust chamber; 27. Exhaust hole; 28. Liquid inlet filter hole; 29. ​​Conical dispersion block; 140. Servo motor; 141. Movable cylinder; 142. Crescent-shaped eccentric block; 143. Incomplete gear; 144. Rack; 145. Fixed rod; 146. Piston; 147. First one-way valve; 148. Second one-way valve. DETAILED DESCRIPTION

[0020] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0021] It should be noted that the terms "first," "second," "symmetrical," "array," "disposed on," and "provided with" are used only to distinguish descriptions from positional descriptions and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the technical features indicated. Therefore, limitations on features such as "first" and "symmetrical" may explicitly or implicitly include one or more of these features; similarly, when the quantity of certain features is not limited in the form of words such as "two" or "three," it should be noted that these features also explicitly or implicitly include one or more of the number of features. In the present invention, unless otherwise expressly specified or limited, terms such as "installation," "connection," and "fixation" should be understood broadly; for example, they may refer to fixed connection, detachable connection, or integral molding; they may refer to mechanical connection, direct connection, welding, or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specification and drawings in conjunction with specific circumstances.

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] like Figures 1-9 As shown, an embodiment of the present invention provides a dehydration device for a coal washer, including a dehydration component 1, which includes an operating frame 10, an annular fixing plate 11, a plurality of springs 12, a conical operating box 13, a vibration air intake mechanism 14, a spiral plate 15, a circular cylinder 16 and a drain pipe 17, wherein a circular operating through hole 5 is opened on the upper surface of the operating frame 10, and the conical operating box 13 passes through the circular operating through hole 5, the annular fixing plate 11 is arranged on the outer wall of the conical operating box 13, and the top ends of the plurality of springs 12 are evenly arranged on the lower surface of the annular fixing plate 11, and the bottom ends of the plurality of springs 12 are evenly arranged on the upper surface of the operating frame 10, and the spiral plate 15 is arranged on the conical operating box. 13, and the circular cylinder 16 is arranged on the inner wall of the spiral plate 15, the inner walls of the spiral plate 15 are respectively provided with a spiral water guide chamber 25 and a spiral exhaust chamber 26, and the spiral water guide chamber 25 is arranged above the spiral exhaust chamber 26, the inner top wall of the spiral water guide chamber 25 is evenly provided with liquid inlet filter holes 28, and the inner bottom wall of the spiral exhaust chamber 26 is evenly provided with exhaust holes 27, the vibration air intake mechanism 14 is provided on the annular fixed plate 11, the conical operation box 13 and the spiral plate 15, the drain pipe 17 sequentially passes through the conical operation box 13 and the spiral plate 15, and the drain pipe 17 is fixedly connected to the conical operation box 13 and the spiral plate 15, and the drain pipe 17 is communicated with the spiral water guide chamber 25.

[0024] In this embodiment, specifically, the vibration intake mechanism 14 includes a servo motor 140, a movable cylinder 141, a crescent-shaped eccentric block 142, an incomplete gear 143, two racks 144, a plurality of fixing rods 145, a piston 146, a first one-way valve 147 and a second one-way valve 148, wherein the lower surface of the servo motor 140 is provided with a mounting plate 4, the mounting plate 4 is provided on the outer wall of the annular fixing plate 11, and one side of the crescent-shaped eccentric block 142 is provided on the output shaft of the servo motor 140, one side of the movable cylinder 141 is slidably connected to the outer wall of the conical operating box 13, and the other side of the movable cylinder 141 is provided with a movable groove 6, and the two racks 144 is symmetrically arranged on the inner wall of the movable groove 6, and the outer wall of the incomplete gear 143 intermittently meshes with the adjacent side of the two racks 144, the incomplete gear 143 is arranged on the other side of the crescent-shaped eccentric block 142, the bottom ends of several fixing rods 145 are evenly arranged on the upper surface of the annular fixing plate 11, and the top ends of several fixing rods 145 are evenly arranged on the lower surface of the piston 146, the outer wall of the piston 146 is fitted to the inner wall of the movable cylinder 141, the upper surface of the movable cylinder 141 is respectively penetrated by the intake pipe 7 and the first exhaust pipe 8, and the intake pipe 7 and the first exhaust pipe 8 are both connected to the interior of the movable cylinder 141, the intake pipe 7 and the first exhaust pipe 8 are connected to the interior of the movable cylinder 141, and the intake pipe 7 and the first exhaust pipe 8 are connected to the interior of the movable cylinder 141. The exhaust pipe 8 is fixedly connected to the movable cylinder 141, the first one-way valve 147 is arranged on the outer wall of the intake pipe 7, the top of the first exhaust pipe 8 is provided with a bellows 9, and the top of the bellows 9 is provided with a second exhaust pipe 24, the second one-way valve 148 is provided on the outer wall of the second exhaust pipe 24, one end of the second exhaust pipe 24 passes through the conical operating box 13 and the spiral plate 15 in sequence, and the second exhaust pipe 24 is fixedly connected to the conical operating box 13 and the spiral plate 15, the second exhaust pipe 24 is connected to the exhaust hole 27, and the output shaft of the servo motor 140 provided above drives the crescent-shaped eccentric block 142 to rotate, and the crescent-shaped eccentric block 142 drives the incomplete gear While 143 rotates, the crescent-shaped eccentric block 142 drives the servo motor 140 and the annular fixed plate 11 to vibrate. The annular fixed plate 11 is used to assist the conical operating box 13 through the spring 12 like a vibrating screen. The incomplete gear 143 intermittently engages on the two racks 144, thereby driving the movable cylinder 141 to move up and down on the conical operating box 13. When the movable cylinder 141 moves upward, the air intake pipe 7 draws external gas into the movable cylinder 141. When the movable cylinder 141 moves downward, the gas in the movable cylinder 141 is transmitted to the spiral exhaust chamber 26 through the first exhaust pipe 8, the bellows 9 and the second exhaust pipe 24.

[0025] In this embodiment, specifically, shielding strips 23 are evenly provided on the upper surface of the spiral plate 15 . The shielding strips 23 are used to block water and coal blocks, and to assist in moving water into the liquid inlet filter hole 28 .

[0026] In this embodiment, specifically, a rubber sealing ring 22 is embedded in the outer wall of the piston 146 , and the outer wall of the rubber sealing ring 22 is in contact with the inner wall of the movable cylinder 141 . The rubber sealing ring 22 is provided to enhance the airtightness between the piston 146 and the movable cylinder 141 .

[0027] In this embodiment, specifically, the outer wall of the conical operating box 13 is evenly provided with a slide groove 20, and a slider 21 is evenly provided on one side of the movable cylinder 141. The outer wall of the slider 21 is slidably connected to the inner wall of the slide groove 20. Through the above setting, the slider 21 is moved in the slide groove 20, which can not only assist the movable cylinder 141 to move, but also stabilize the moving position of the movable cylinder 141.

[0028] In this embodiment, specifically, a feeding funnel 2 is provided on the upper surface of the conical operating box 13 , and the feeding funnel 2 is used to control the amount of coal blocks fed.

[0029] In this embodiment, specifically, a conical dispersion block 29 is provided at the top end of the circular cylinder 16. The conical dispersion block 29 is used to disperse the coal blocks and drop them onto the spiral plate 15 to avoid coal block accumulation.

[0030] In this embodiment, specifically, a control panel 3 is provided on the front surface of the operating frame 10 , and the control panel 3 is electrically connected to the servo motor 140 through wires.

[0031] When the present invention is working: relevant personnel control the servo motor 140 to start through the control panel 3, the output shaft of the servo motor 140 drives the crescent-shaped eccentric block 142 to rotate, and the crescent-shaped eccentric block 142 drives the incomplete gear 143 to rotate. At the same time, the crescent-shaped eccentric block 142 drives the servo motor 140 and the annular fixed plate 11 to vibrate. The annular fixed plate 11 is used to assist the conical operating box 13 through the spring 12 like a vibrating screen. The incomplete gear 143 is intermittently engaged on the two racks 144, thereby driving the movable cylinder 141 to move up and down on the conical operating box 13. When the movable cylinder 141 moves upward, the air inlet pipe 7 draws external gas into the movable cylinder 141. When the movable cylinder 141 moves downward, the piston 146 squeezes the gas in the movable cylinder 141, and the gas in the movable cylinder 141 is transmitted to the spiral exhaust chamber 26 through the first exhaust pipe 8, the bellows 9 and the second exhaust pipe 24, wherein the second one-way valve 148 is used to control the second exhaust pipe 24 to discharge the gas in the movable cylinder 141, but the external gas cannot be transmitted to the movable cylinder 141 through the second exhaust pipe 24, the bellows 9 and the first exhaust pipe 8, and the first one-way valve 147 is used to control the gas in the intake pipe 7 to enter the movable cylinder 141, so that the external gas can be transmitted to the movable cylinder 141 through the intake pipe 7, but the gas in the movable cylinder 141 cannot be discharged through the intake pipe 7.

[0032] After that, the relevant personnel put the coal blocks into the feeding funnel 2, and the amount of coal blocks put in is controlled in the feeding funnel 2. The put-in coal blocks fall onto the conical dispersion block 29, and the conical dispersion block 29 disperses the coal blocks and drops them onto the spiral plate 15, wherein the shielding strip 23 is used to block the water and the coal blocks, and the conical operation box 13 drives the coal blocks on the spiral plate 15 to float slightly, so that the coal blocks vibrate and slide on the spiral plate 15, and the water in the coal blocks is filtered into the spiral water guide cavity 25 through the liquid inlet filter hole 28, and at the same time, the gas in the spiral exhaust cavity 26 is transmitted to the coal blocks on the spiral plate 15 through the exhaust hole 27, which can not only dry the coal blocks, but also assist the water to enter the liquid inlet filter hole 28. The water in the liquid inlet filter hole 28 is transmitted to the spiral water guide cavity 25, and the water in the spiral water guide cavity 25 is discharged through the drain pipe 17. The dehydrated coal blocks are discharged through the spiral plate 15 and the conical operation box 13, thereby improving work efficiency.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A dehydration device for a coal washer, comprising a dehydration assembly (1), characterized in that: The dehydration assembly (1) comprises an operating frame (10), an annular fixing plate (11), a plurality of springs (12), a conical operating box (13), a vibrating air intake mechanism (14), a spiral plate (15), a circular cylinder (16) and a liquid discharge pipe (17), wherein: A circular operating through hole (5) is formed on the upper surface of the operating frame (10), and the conical operating box (13) passes through the circular operating through hole (5); The annular fixing plate (11) is arranged on the outer wall of the conical operating box (13), and the top ends of the plurality of springs (12) are evenly arranged on the lower surface of the annular fixing plate (11), and the bottom ends of the plurality of springs (12) are evenly arranged on the upper surface of the operating frame (10); The spiral plate (15) is arranged on the inner wall of the conical operating box (13), and the circular cylinder (16) is arranged on the inner wall of the spiral plate (15); The inner wall of the spiral plate (15) is respectively provided with a spiral water guide cavity (25) and a spiral exhaust cavity (26), and the spiral water guide cavity (25) is arranged above the spiral exhaust cavity (26); Liquid inlet and filter holes (28) are evenly formed on the inner top wall of the spiral water guide cavity (25), and exhaust holes (27) are evenly formed on the inner bottom wall of the spiral exhaust cavity (26); The vibration air intake mechanism (14) is arranged on the annular fixed plate (11), the conical operating box (13) and the spiral plate (15); The drainage pipe (17) sequentially passes through the conical operating box (13) and the spiral plate (15), and the drainage pipe (17) is fixedly connected to the conical operating box (13) and the spiral plate (15). The drainage pipe (17) is communicated with the spiral water guide cavity (25).

2. The dehydration device for coal washing machine according to claim 1, characterized in that: The vibration air intake mechanism (14) includes a servo motor (140), a movable cylinder (141), a crescent-shaped eccentric block (142), an incomplete gear (143), two racks (144), a plurality of fixed rods (145), a piston (146), a first one-way valve (147) and a second one-way valve (148), wherein: A mounting plate (4) is provided on the lower surface of the servo motor (140), the mounting plate (4) is arranged on the outer wall of the annular fixing plate (11), and one side of the crescent-shaped eccentric block (142) is arranged on the output shaft of the servo motor (140); One side of the movable cylinder (141) is slidably connected to the outer wall of the conical operating box (13), and the other side of the movable cylinder (141) is provided with a movable groove (6); The two racks (144) are symmetrically arranged on the inner wall of the movable groove (6), and the outer wall of the incomplete gear (143) intermittently meshes with the adjacent side of the two racks (144), and the incomplete gear (143) is arranged on the other side of the crescent-shaped eccentric block (142); The bottom ends of several fixing rods (145) are evenly arranged on the upper surface of the annular fixing plate (11), and the top ends of several fixing rods (145) are evenly arranged on the lower surface of the piston (146), and the outer wall of the piston (146) is in contact with the inner wall of the movable cylinder (141); An air intake pipe (7) and a first exhaust pipe (8) are respectively passed through the upper surface of the movable cylinder (141), and the air intake pipe (7) and the first exhaust pipe (8) are both connected to the interior of the movable cylinder (141). The air intake pipe (7) and the first exhaust pipe (8) are fixedly connected to the movable cylinder (141), and the first one-way valve (147) is provided on the outer wall of the air intake pipe (7); A bellows (9) is provided at the top end of the first exhaust pipe (8), and a second exhaust pipe (24) is provided at the top end of the bellows (9), and the second one-way valve (148) is provided on the outer wall of the second exhaust pipe (24); One end of the second exhaust pipe (24) passes through the conical operating box (13) and the spiral plate (15) in sequence, and the second exhaust pipe (24) is fixedly connected to the conical operating box (13) and the spiral plate (15), and the second exhaust pipe (24) is connected to the exhaust hole (27).

3. The dehydration device for coal washing machine according to claim 1, characterized in that: The upper surface of the spiral plate (15) is evenly provided with shielding strips (23).

4. The dehydration device for coal washing machine according to claim 2, characterized in that: A rubber sealing ring (22) is embedded in the outer wall of the piston (146), and the outer wall of the rubber sealing ring (22) is in contact with the inner wall of the movable cylinder (141).

5. The dehydration device for coal washing machine according to claim 2, characterized in that: The outer wall of the conical operating box (13) is evenly provided with a slide groove (20), and one side of the movable cylinder (141) is evenly provided with a slider (21), and the outer wall of the slider (21) is slidably connected to the inner wall of the slide groove (20).

6. The dehydration device for coal washing machine according to claim 1, characterized in that: A feeding funnel (2) is provided on the upper surface of the conical operating box (13).

7. The dehydration device for coal washing machine according to claim 1, characterized in that: A conical dispersion block (29) is provided at the top end of the circular cylinder (16).

8. The dehydration device for coal washing machine according to claim 2, characterized in that: A control panel (3) is provided on the front surface of the operating frame (10), and the control panel (3) is electrically connected to the servo motor (140) via an electric wire.

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