A jigging air chamber jig

Abstract

This invention discloses an under-screen air chamber jig, relating to the field of jig technology. The jig features a second screen plate mechanism and a first screen plate mechanism mounted on a support frame. A water tank is formed below the first and second screen plate mechanisms inside the machine body, and a jig chamber is formed above the first and second screen plate mechanisms inside the machine body. An air chamber is located inside the water tank. A fine coal discharge pipe is installed on the machine body, through which the fine coal flows out. In this invention, pulsed water flow performs density stratification on the coal blocks on the second screen plate mechanism. The bottom layer of gangue is blocked by an overflow weir and enters the discharge channel. A gangue collection cylinder collects the gangue. The upper layers of middlings and fine coal enter the first screen plate mechanism. Pulsed water flow performs density stratification on the coal blocks on the first screen plate mechanism. Middlings are collected in a middlings collection cylinder, and the sorted fine coal flows out through the fine coal discharge pipe, completing the separation and collection of gangue, middlings, and fine coal in coal sorting, achieving efficient and energy-saving coal block sorting.

Description

Technical Field

[0001] This invention relates to the field of jig technology, and in particular to an under-screen air chamber jig. Background Technology

[0002] Jigging is a crucial step in coal sorting, and its separation effect directly affects the efficiency of coal sorting and the quality of the final product. Jigging is a widely used technology in the field of material sorting. Its core relies on the periodic rise and fall of pulsed water flow to achieve material stratification according to density. Under-screen air chamber jigs occupy an important position in various material sorting scenarios due to their stable airflow and high sorting efficiency.

[0003] In actual operation, existing under-screen air chamber jigs generally suffer from problems such as uneven material stratification efficiency and easy caking and accumulation of bottom materials. Existing technologies lack dedicated material vibration and dispersion structures, and coal blocks tend to clump together after being put into the jig chamber, resulting in incomplete density stratification. Moreover, most of them use single-layer screen plates for sorting, which cannot achieve the classification and separation of gangue, middlings, and fine coal, and are prone to mixing of coals of different qualities. The gangue removal rate is low, and the overall sorting accuracy is difficult to meet the requirements of fine sorting. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an under-screen air chamber jig that enhances the coal block dispersion effect and improves the density stratification efficiency and uniformity of coal blocks.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: A support is set inside the machine body. A second screen plate mechanism for jigging and separating gangue in raw coal is set on one side of the support, and a first screen plate mechanism for jigging and separating middlings in raw coal is set on the other side of the support. An overflow weir for blocking gangue is set on one side of the first screen plate mechanism. A water tank is formed inside the machine body below the first and second screen plate mechanisms. A jigging chamber is formed inside the machine body above the first and second screen plate mechanisms. A discharge channel is set inside the water tank below the overflow weir. Gangue separated by the second screen plate mechanism flows into the discharge channel. Multiple air chambers are set inside the water tank below the first and second screen plate mechanisms. A water foot connected to the water tank is set at the bottom of each air chamber. A fine coal discharge pipe is set on the side of the machine body near the first screen plate mechanism. Fine coal flows out through the fine coal discharge pipe.

[0006] Furthermore, the machine body is equipped with an air bag, the inlet end of which is connected to a connecting pipe, and multiple outlet ends of the air bag are respectively equipped with gas pipes. The inlet end of each gas pipe is connected to the outlet end of the air bag, and the outlet end of each gas pipe is connected to the corresponding air chamber.

[0007] Furthermore, each of the gas pipelines is equipped with a gas pipeline valve body.

[0008] Furthermore, the machine body is equipped with a water bag, the inlet end of which is connected to a water supply pipe, and multiple outlet ends of the water bag are respectively equipped with balancing water pipes. The inlet end of each balancing water pipe is connected to the outlet end of the water bag, and the outlet end of each balancing water pipe is connected to a water tank.

[0009] Furthermore, each of the aforementioned balancing water pipes is equipped with a solenoid valve.

[0010] Furthermore, the structure of the first sieve plate mechanism is the same as that of the second sieve plate mechanism. The first sieve plate mechanism is as follows: a plurality of sieve holes are provided on the sieve plate, each sieve hole is covered with a vibrating plate, one side of each vibrating plate is hinged to the sieve plate by a hinge, the other side of each vibrating plate is provided with a cap plate, a magnetic block is provided on the sieve plate and magnetically connected to the cap plate, and a vibration dispersion component is provided on each vibrating plate to drive its vibration.

[0011] Furthermore, the vibration dispersion component comprises: an annular airbag on one side of the vibrating plate, a fixed cylinder inside the annular airbag on the other side of the vibrating plate, a positioning ring fixedly installed on the inner wall of the fixed cylinder, a connecting rod slidably connected inside the positioning ring, a guide ball at one end of the connecting rod, and a vibrating ball that abuts against the vibrating plate at the other end of the connecting rod.

[0012] Furthermore, a gas piston that is slidably connected to the fixed cylinder is provided on the outer circumference of the connecting rod.

[0013] Furthermore, the outer circumferential sidewall of the fixed cylinder near the vibrating plate end is uniformly machined with multiple air holes, each air hole being interconnected with the annular air bladder.

[0014] Furthermore, the bottom of the machine body is provided with a gangue collecting cylinder for collecting gangue, which is located below the discharge channel. The bottom of the machine body is also provided with a middlings collecting cylinder for collecting middlings, which is located at the bottom of the first screen plate mechanism in the output direction.

[0015] The beneficial effects of the present invention are as follows: (1) The present invention uses pulsed water flow to perform density stratification of coal blocks on the second screen plate mechanism. The gangue at the bottom layer enters the discharge channel through the overflow weir. The gangue collection cylinder below the discharge channel collects the gangue. The medium coal and fine coal at the top layer enter the first screen plate mechanism. The pulsed water flow performs density stratification of coal blocks on the first screen plate mechanism. The medium coal enters the medium coal collection cylinder for collection. The separated coal blocks continue to be output. The sorted fine coal flows out through the fine coal discharge pipe, thus completing the separation and collection of gangue, medium coal and fine coal in coal sorting, and realizing efficient and energy-saving sorting of coal blocks.

[0016] (2) When the pulsed water flow of the present invention rises, the guide ball is driven by the water flow to vibrate the vibrating ball and vibrating plate to vibrate. Through the resonance transmission effect, the coal blocks are quickly dispersed, avoiding the coal blocks from clumping together and affecting the density stratification. At the same time, the vibrating plate achieves repeated coverage and opening of the screen holes with the water flow. Combined with the pulsed water flow, the material is further dispersed, allowing the coal blocks to be fully subjected to the pulsed water flow to complete the density stratification. This can enhance the coal block dispersion effect and improve the density stratification efficiency and uniformity of the coal blocks.

[0017] (3) When the pulsed water flow of the present invention descends, the magnetic action of the magnetic block and the cap plate realizes the precise reset of the vibrating plate. After the screen hole space is reduced, the negative pressure is formed by the Venturi effect, which can quickly suck up small particles of gangue to pass through the screen, improve the thoroughness of gangue separation. At the same time, after the vibrating plate is completely closed, it can block fine coal particles from passing through the bottom of the screen plate, effectively avoid the loss of fine coal, and significantly improve the recycling rate of coal resources.

[0018] (4) The present invention provides water to the water tank in a balanced manner through a water tank and multiple balanced water pipes, and provides air to each air chamber in a uniform manner through an air tank and multiple gas pipes. The air chambers, water feet and water tank work together to form a stable and continuous pulse water flow, which provides a uniform and controllable power basis for coal density stratification, avoids the effect of water flow fluctuation on the sorting effect, and ensures the continuity and stability of the entire jigging sorting operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the under-screen air chamber jig of the present invention.

[0020] Figure 2 yes Figure 1 Top view.

[0021] Figure 3 This is a schematic diagram of the internal structure of the organism.

[0022] Figure 4 This is a structural diagram of the air receiver, gas pipes, and air chamber.

[0023] Figure 5 This is a schematic diagram of the structure of the vibrating plate covering the screen holes.

[0024] Figure 6 This is a schematic diagram of the structure where the vibrating plate is separated from the sieve holes.

[0025] Figure 7 This is a schematic diagram of the vibration dispersion component.

[0026] Figure 8 This is a schematic diagram of the internal structure of the fixed cylinder.

[0027] Figure 9 This is a structural diagram of the annular airbag, the fixed cylinder, and the air vent.

[0028] Figure 10 This is a structural diagram of the connecting rod, the guide ball, and the positioning ring.

[0029] Reference numerals: 1. Machine body; 2. Fine coal discharge pipe; 3. First screen plate mechanism; 301. Screen plate; 302. Vibrating plate; 303. Hinge; 304. Magnetic block; 305. Screen hole; 306. Annular air bag; 307. Connecting rod; 308. Guide ball; 309. Fixed cylinder; 310. Vibrating ball; 311. Gas piston; 312. Positioning ring; 313. Air hole; 314. Cap plate; 4. Second screen plate mechanism; 5. Jigging chamber; 6. Air chamber; 7. Water chamber; 8. Gas pipeline valve body; 9. Gas pipeline; 10. Solenoid valve; 11. Balance water pipe; 12. Water supply pipe; 13. Connecting pipe; 14. Water foot; 15. Air chamber; 16. Overflow weir; 17. Discharge channel; 18. Water tank; 19. Gangue collection cylinder; 20. Mid-coal collection cylinder; 21. Support. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] like Figures 1 to 4 As shown, the under-screen air chamber jig in this embodiment is composed of a machine body 1, a fine coal discharge pipe 2, a first screen plate mechanism 3, a second screen plate mechanism 4, a jig chamber 5, an air chamber 6, a water chamber 7, a gas pipeline valve body 8, a gas pipeline 9, a solenoid valve 10, a balance water pipe 11, a water supply pipe 12, a connecting pipe 13, a water foot 14, an air chamber 15, an overflow weir 16, a discharge channel 17, a water tank 18, a gangue collection cylinder 19, a middlings coal collection cylinder 20, and a support 21.

[0032] A support frame 21 is installed inside the machine body 1. A second screen plate mechanism 4 for jigging and separating gangue from raw coal is installed on one side of the support frame 21, and a first screen plate mechanism 3 for jigging and separating middlings from raw coal is installed on the other side of the support frame 21. An overflow weir 16 for blocking gangue is installed on one side of the first screen plate mechanism 3. A water tank 18 is formed inside the machine body 1 below the first screen plate mechanism 3 and the second screen plate mechanism 4, and a jigging chamber 5 is formed inside the machine body 1 above the first screen plate mechanism 3 and the second screen plate mechanism 4. An overflow weir 16 is installed inside the water tank 18. The waste rock separated by the second screen plate mechanism 4 flows into the discharge channel 17 below the weir 16. A waste rock collection cylinder 19 is located at the bottom of the machine body 1, below the discharge channel 17. Multiple air chambers 15 are located inside the water tank 18, below the first screen plate mechanism 3 and the second screen plate mechanism 4. Each air chamber 15 has a water foot 14 at its bottom that communicates with the water tank 18. A fine coal discharge pipe 2 is located on the side of the machine body 1 closest to the first screen plate mechanism 3, through which fine coal flows out. A middlings collection cylinder 20 is located at the bottom of the machine body 1, at the bottom in the output direction of the first screen plate mechanism 3.

[0033] The body 1 is equipped with a blower 6. The inlet end of the blower 6 is connected to a connecting pipe 13. Multiple outlet ends of the blower 6 are respectively equipped with gas pipes 9. Each gas pipe 9 is equipped with a gas pipe valve body 8. The inlet end of each gas pipe 9 is connected to the outlet end of the blower 6. The outlet end of each gas pipe 9 is connected to the corresponding air chamber 15.

[0034] The machine body 1 is equipped with a water tank 7. The inlet end of the water tank 7 is connected to a water supply pipe 12. The multiple outlet ends of the water tank 7 are respectively equipped with balance water pipes 11. Each balance water pipe 11 is equipped with a solenoid valve 10. The inlet end of each balance water pipe 11 is connected to the outlet end of the water tank 7, and the outlet end of each balance water pipe 11 is connected to the water tank 18.

[0035] The structure of the first sieve plate mechanism 3 is the same as that of the second sieve plate mechanism 4, such as... Figures 5 to 6 As shown, the first sieve plate mechanism 3 is composed of a sieve plate 301, a vibrating plate 302, a hinge 303, a magnetic block 304, a sieve hole 305, a cap plate 314, and a vibration dispersion assembly.

[0036] The first sieve plate mechanism 3 is as follows: a plurality of sieve holes 305 are provided on the sieve plate 301, and each sieve hole 305 is covered with a vibrating plate 302. One side of each vibrating plate 302 is hinged to the sieve plate 301 by a hinge 303. The other side of each vibrating plate 302 is provided with a cap plate 314. A magnetic block 304 is provided on the sieve plate 301 and magnetically connected to the cap plate 314. Each vibrating plate 302 is provided with a vibration dispersion component that drives it to vibrate.

[0037] like Figures 7 to 10 As shown, the vibration dispersion assembly is composed of an annular airbag 306, a connecting rod 307, a guide ball 308, a fixed cylinder 309, a vibrating ball 310, a gas piston 311, a positioning ring 312, and an air hole 313.

[0038] The vibration dispersion assembly comprises: an annular airbag 306 on one side of the vibrating plate 302; a fixed cylinder 309 located inside the annular airbag 306 on the same side of the vibrating plate 302; a positioning ring 312 fixedly installed on the inner wall of the fixed cylinder 309; a connecting rod 307 slidably connected inside the positioning ring 312; and a gas piston 311 slidably connected to the fixed cylinder 309 on the outer circumference of the connecting rod 307. A guide ball 308 is provided at one end of the connecting rod 307, and a vibrating ball 310 abutting against the vibrating plate 302 is provided at the other end of the connecting rod 307. Multiple air holes 313 are uniformly machined on the outer circumferential side wall of the fixed cylinder 309 near the vibrating plate 302, and each air hole 313 is interconnected with the annular airbag 306.

[0039] The working principle of this embodiment is as follows: Water is added to the water tank 7 through the water supply pipe 12. The water in the water tank 7 flows into the water tank 18 through multiple outlets of the water tank 7 and multiple balancing water pipes 11. The water flow inside the balancing water tank 18 is balanced. Coal blocks are then placed onto the second screen plate mechanism 4 located in the jig chamber 5. Gas is introduced into the air tank 6 through the connecting pipe 13. The gas in the air tank 6 enters the corresponding air chamber 15 through multiple outlets of the air tank 6 and multiple gas pipes 9. The air pressure forces the water in the air chamber 15 to enter the water tank 18 through the water feet 14. The water level in the water tank 18 rises and acts on the coal blocks in the jig chamber 5 through the second screen plate mechanism 4. When the compressed air in the air chamber 15 is discharged, the gas... As the pressure drops, the water in the water tank 18 re-enters the air chamber 15, causing the water level in the water tank 18 to drop. This creates a pulsed water flow in the jigging chamber 5, which stratifies the coal blocks on the second screen plate mechanism 4 by density. The bottom layer of gangue is blocked by the overflow weir 16 and enters the discharge channel 17. The gangue collection cylinder 19 below the discharge channel 17 collects the gangue. The middle coal and fine coal in the upper layer enter the first screen plate mechanism 3, where the pulsed water flow stratifies the coal blocks by density. The middle coal enters the middle coal collection cylinder 20 for collection. The separated coal blocks continue to be output, while the sorted fine coal flows out through the fine coal discharge pipe 2, thus completing the separation of gangue, middle coal, and fine coal in the coal blocks.

[0040] Since the structure of the first screen plate mechanism 3 is the same as that of the second screen plate mechanism 4, the working principle of the pulsed water flow to perform density stratification on the coal blocks on the first screen plate mechanism 3 is the same as that of the pulsed water flow to perform density stratification on the coal blocks on the second screen plate mechanism 4. The working principle of the pulsed water flow to perform density stratification on the coal blocks on the first screen plate mechanism 3 is as follows: when the pulsed water flow rises, it enters the multiple screen holes 305 of the screen plate 301. The water flow is dispersed by the vibration dispersion component of the vibrating plate 302, so that the vibrating plate 302 quickly generates a repetitive action of covering and opening the screen holes 305, which facilitates the stratification of coal blocks.

[0041] The working principle of the vibration dispersion component is as follows: When the water flow rises, during the operation of the vibrating plate 302, the guide ball 308 is subjected to the pulsed water flow. The guide ball 308 drives the vibrating ball 310 to vibrate through the connecting rod 307, causing the vibrating ball 310 to drive the vibrating plate 302 to vibrate. Utilizing the resonant transmission effect of the vibrating plate 302 on the surface of the screen plate 301, the coal lumps can be quickly dispersed in a local area, making it easier for the coal lumps to be stratified under the action of the pulsed water flow. Furthermore, the pulsed water flow further separates and covers the vibrating plate 302 from the screen holes 305. The water flow from the screen holes 305 sorts and disperses the material and stratifies it based on the module density. After the water flow decreases, the vibrating plate 302 returns to its original position due to the magnetic action of the cap plate 314 and the magnetic block 304. As the vibrating plate 302 closes, the space of the screen hole 305 decreases, the water flow rate increases, and a negative pressure is formed by the Venturi effect, which can quickly draw in small particles of gangue and pass them through the screen. After the vibrating plate 302 is completely closed, it can prevent small particles of fine coal that may be present from passing through the screen at the bottom of the screen plate 301.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A jigging machine with an air chamber for screening, characterized in that: A support frame (21) is installed inside the machine body (1). A second screen plate mechanism (4) for jigging and separating gangue in raw coal is installed on one side of the support frame (21), and a first screen plate mechanism (3) for jigging and separating middlings in raw coal is installed on the other side of the support frame (21). An overflow weir (16) for blocking gangue is installed on one side of the first screen plate mechanism (3). A water tank (18) is formed inside the machine body (1) below the first screen plate mechanism (3) and the second screen plate mechanism (4), and a water tank (18) is formed inside the machine body (1) above the first screen plate mechanism (3) and the second screen plate mechanism (4). The jigging chamber (5) and the water tank (18) are equipped with a discharge channel (17) located below the overflow weir (16). The gangue sorted by the second screen plate mechanism (4) flows into the discharge channel (17). The water tank (18) is equipped with multiple air chambers (15) located below the first screen plate mechanism (3) and the second screen plate mechanism (4). Each air chamber (15) has a water foot (14) at the bottom that is connected to the water tank (18). The machine body (1) is equipped with a fine coal discharge pipe (2) on the side near the first screen plate mechanism (3). The fine coal flows out through the fine coal discharge pipe (2).

2. The under-screen air chamber jig according to claim 1, characterized in that: The body (1) is provided with a blower (6), the inlet end of the blower (6) is provided with a connecting pipe (13) connected to it, and multiple outlet ends of the blower (6) are respectively provided with gas pipes (9). The inlet end of each gas pipe (9) is connected to the outlet end of the blower (6), and the outlet end of each gas pipe (9) is connected to the corresponding air chamber (15).

3. The under-screen air chamber jig according to claim 2, characterized in that: Each of the gas pipelines (9) is provided with a gas pipeline valve body (8).

4. The under-screen air chamber jig according to claim 1, characterized in that: The machine body (1) is provided with a water bag (7), and the inlet end of the water bag (7) is provided with a water supply pipe (12) that is connected to it. The multiple outlet ends of the water bag (7) are respectively provided with a balance water pipe (11). The inlet end of each balance water pipe (11) is connected to the outlet end of the water bag (7), and the outlet end of each balance water pipe (11) is connected to the water tank (18).

5. The under-screen air chamber jig according to claim 4, characterized in that: Each of the aforementioned balance water pipes (11) is equipped with a solenoid valve (10).

6. The under-screen air chamber jig according to claim 1, characterized in that, The structure of the first sieve plate mechanism (3) is the same as that of the second sieve plate mechanism (4). The first sieve plate mechanism (3) is as follows: a plurality of sieve holes (305) are provided on the sieve plate (301), and each sieve hole (305) is covered with a vibrating plate (302). One side of each vibrating plate (302) is hinged to the sieve plate (301) by a hinge (303), and the other side of each vibrating plate (302) is provided with a cap plate (314). A magnetic block (304) is provided on the sieve plate (301) and magnetically connected to the cap plate (314). Each vibrating plate (302) is provided with a vibration dispersion component that drives it to vibrate.

7. The under-screen air chamber jig according to claim 6, characterized in that, The vibration dispersion component is as follows: a ring-shaped airbag (306) is provided on one side of the vibrating plate (302), a fixed cylinder (309) is provided on one side of the vibrating plate (302) inside the ring-shaped airbag (306), a positioning ring (312) is fixedly installed on the inner wall of the fixed cylinder (309), a connecting rod (307) is slidably connected inside the positioning ring (312), a guide ball (308) is provided at one end of the connecting rod (307), and a vibrating ball (310) that abuts against the vibrating plate (302) is provided at the other end of the connecting rod (307).

8. The under-screen air chamber jig according to claim 7, characterized in that: The connecting rod (307) is provided with a gas piston (311) on its outer circumference that is slidably connected to the fixed cylinder (309).

9. The under-screen air chamber jig according to claim 7, characterized in that: The outer circumferential sidewall of the fixed cylinder (309) near the vibrating plate (302) is uniformly machined with multiple air holes (313), and each air hole (313) is connected to the annular air bag (306).

10. The under-screen air chamber jig according to claim 1, characterized in that: The bottom of the machine body (1) is provided with a gangue collection cylinder (19) for collecting gangue, which is located below the discharge channel (17). The bottom of the machine body (1) is provided with a middlings collection cylinder (20) for collecting middlings, which is located at the bottom of the output direction of the first screen plate mechanism (3).

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