CN218452274U - Coal dressing jigging machine with easily adjust numerical control bellows - Google Patents

Abstract

The utility model relates to a coal dressing jigging machine with easily adjust numerical control bellows, including low pressure gas holder, main water pipe, respectively with the waste rock part of low pressure gas holder and main water pipe intercommunication, respectively with the middlings part of low pressure gas holder and main water pipe intercommunication and respectively with the inferior clean coal part of low pressure gas holder and main water pipe intercommunication, the waste rock part is connected with the middlings part, the middlings part is connected with inferior clean coal part. The low-pressure air storage tank can respectively provide compressed air for the gangue part, the middlings part and the secondary clean coal part, and the main water pipe can respectively provide all water for coal washing for the gangue part, the middlings part and the secondary clean coal part.

Description

Coal dressing jigging machine with easily adjust numerical control bellows

Technical Field

The utility model relates to a coal dressing jigger with easily adjust numerical control bellows.

Background

The coal preparation jigger is equipment for realizing a jigging process. The material is mainly sorted according to density difference in the vertical lifting speed-changing medium flow. The difference of the particle size and the shape of the materials has certain influence on the beneficiation result.

Present file CN212040954U, a raw coal is selected separately with preventing gluing stifled jigger, including the jigger body, the jigger body is fixed on the support frame, jigger body upper end fixed mounting has the pan feeding pipe, the jigger body is including arranging material slag channel, it is equipped with row cinder notch to arrange material slag channel bottom mounting, it includes two elastic plates to arrange material slag channel, the elastic plate passes through gusset plate and jigger body fixed connection, the box is carried to the elastic plate lateral surface is equipped with vibrator, vibrator passes through connecting plate and support frame fixed connection.

The prior document CN101185912, a lump coal jigger, a coal dressing system and a coal dressing method thereof belong to the field of jigging and coal dressing, and are particularly suitable for dressing lump coal. The lump coal jigger of the invention is formed by increasing the inclination angle of the sieve plate of the existing multi-section jigger by multiple times and changing the overflow channel into a clean coal discharge channel; the coal dressing system applying the lump coal jigger comprises the lump coal jigger, a gangue bucket elevator, a middling bucket elevator, a clean coal bucket elevator, a circulating water bucket, a circulating water pump, a water supplementing device and the like; the coal dressing method using the lump coal jigger can sort various products such as gangue, middlings and clean coal at a time, and the amount of supplemented water used in the sorting process is small.

By adopting the two modes, the problem that the resistance of the numerical control air box is large in the frequent operation process can not be solved, so that the numerical control air box is difficult to adjust.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a numerical control bellows resistance is less has coal dressing jigger of easily adjusting numerical control bellows is provided.

The utility model adopts the following technical scheme:

the utility model discloses a low pressure gas holder, main water pipe, respectively with the waste rock part of low pressure gas holder and main water pipe intercommunication, respectively with the middlings part of low pressure gas holder and main water pipe intercommunication and respectively with the inferior clean coal part of low pressure gas holder and main water pipe intercommunication, the waste rock part is connected with the middlings part, the middlings part is connected with inferior clean coal part.

The waste rock part includes the waste rock box, the fixed waste rock sieve that sets up at the waste rock box inboard, set up in the waste rock box inboard and be located the waste rock screening mouth on waste rock sieve right side, set up at the left feed inlet of waste rock box, set up the waste rock bin outlet in waste rock box below, set up the waste rock row's of waste rock bin outlet department unit, set up in the waste rock box and be located the waste rock buoy device of waste rock sieve top, set up the waste rock two-chamber numerical control bellows between waste rock box and low pressure gas holder, set up the waste rock shunt pipe between main water pipe and waste rock box and set up the waste rock gate valve on the waste rock shunt pipe, the part and the middlings part intercommunication that are located waste rock sieve top in the waste rock box, waste rock buoy device and waste rock row material unit signal connection, waste rock sieve slope, waste rock buoy device is located the right-hand member portion of waste rock shunt pipe from left to right, waste rock screening mouth is located the right side of buoy device.

The utility model discloses a two room numerical control bellows of waste rock includes first plenum, set up in first plenum right side and with first plenum parallel arrangement's second plenum, set up in the third plenum of second plenum below, set up the first vent between first plenum and third plenum, set up the second vent between second plenum and third plenum and set up the ventilation pipe between third plenum and waste rock box body, first plenum is provided with first device that closes;

the first air closing device comprises a support fixedly arranged above the first air chamber, a motor arranged at the top of the support, a speed reducer fixedly arranged between the outer side wall of the top of the support and the motor, a rotary table arranged at the inner side of the support and fixedly connected with an output shaft of the speed reducer, a first connecting rod of which the upper end is rotatably connected to the eccentric part of the rotary table and positioned at the inner side of the support, a second connecting rod of which the upper end is rotatably connected with the lower end of the connecting rod, a fixed frame fixedly arranged at the top of the first air chamber and a closing device arranged on the second connecting rod, wherein the second connecting rod penetrates through the fixed frame, and a linear bearing is arranged between the second connecting rod and the fixed frame;

the locking device comprises an annular locking cavity, a locking barrel, an annular bulge A, an annular bulge B, a connecting rod and an annular jacking block, wherein the annular locking cavity is fixed on the L-shaped section and is positioned on the inner side of the first air chamber;

a third air vent is arranged below the first air chamber, the lower part of the third air vent is communicated with a low-pressure air storage tank, the tight closing barrel is positioned above the third air vent, the first air vent is positioned on the right side of the tight closing barrel, the annular jacking block is coaxial with the third air vent, and the diameter of the annular jacking block is larger than that of the third air vent;

the second air chamber is provided with a second air closing device, the structure of the second air closing device is the same as that of the first air closing device, the first air closing device and the second air closing device run in a staggered mode, a tight closing barrel on the second air closing device is located above the second air vent, and the right side of the second air chamber is communicated with the outside.

The middlings part includes middlings box, the fixed middlings sieve board that sets up at middlings box inboard, set up in middlings box inboard and be located the middlings screening mouth on middlings sieve board right side, set up the middlings bin outlet below the middlings box, set up the middlings row of arranging material unit in middlings bin outlet department, set up in the middlings box and be located the middlings buoy device of middlings sieve board top, set up middlings three-chamber numerical control bellows between middlings box and low pressure gas holder, set up the middlings shunt tubes between main water pipe and middlings box and set up the middlings gate valve on the middlings shunt tubes, the part that is and be located middlings sieve board top in the middlings box communicates with waste rock part and inferior clean coal part respectively, middlings buoy device and middlings row material unit signal connection, middlings sieve board from left to right, middlings buoy device is located the right-hand member portion of middlings sieve board, middlings screening mouth is located the right side of middlings buoy device.

Inferior clean coal part is including inferior clean coal box, fixed setting at the inboard inferior clean coal sieve plate of inferior clean coal box, set up in inferior clean coal box inboard and be located inferior clean coal sieve plate right side inferior clean coal screening mouth, set up the discharge gate on inferior clean coal box right side, set up inferior clean coal discharge gate in inferior clean coal box below, set up inferior clean coal discharge unit in inferior clean coal discharge gate department, set up in inferior clean coal box and be located inferior clean coal buoy device of inferior clean coal sieve plate top, set up inferior clean coal two rooms numerical control bellows between inferior clean coal box and low pressure gas holder, set up inferior clean coal distributive pipe between main water pipe and inferior clean coal box and set up inferior clean coal gate valve on inferior clean coal distributive pipe, inferior clean coal box is internal and the part that is located inferior clean coal sieve plate top communicates with middling part, inferior clean coal buoy device and inferior clean coal discharge unit signal connection, inferior clean coal buoy device is from left to right located inferior clean coal sieve plate right end portion, inferior clean coal buoy device is located inferior clean coal sieve plate right side inferior clean coal screening right side inferior clean coal downward sloping.

The right side of inferior clean coal box is provided with bed height adjustment mechanism.

The quantity of ventilation pipe is two.

The outer side wall of the tight closing cylinder and the annular tight closing cavity are provided with a gap.

The utility model discloses positive effect as follows:

1. the low-pressure air storage tank can respectively provide compressed air for the gangue part, the middlings part and the secondary clean coal part, and the main water pipe can respectively provide all water for coal washing for the gangue part, the middlings part and the secondary clean coal part.

2. Raw coal enters a waste rock box body through a feed inlet, a waste rock gate valve is opened, water in a main water pipe enters the waste rock box body through a waste rock water distribution pipe, the waste rock gate valve is closed after the water in the waste rock box body is enough, a low-pressure gas storage tank exhausts and inhales the water in the waste rock box body periodically through a waste rock two-chamber numerical control air box, the water in the waste rock box body forms washing water pulsation, so that raw materials on a waste rock sieve plate are screened, a waste rock layer is formed on the waste rock sieve plate due to the characteristics of the raw coal, and under the action of a waste rock buoy device and a waste rock discharge unit, the waste rock layer on the waste rock sieve plate is discharged through a waste rock screening port and a waste rock discharge port.

3. The conventional gas closing device needs to overcome the resistance of compressed gas in a low-pressure gas storage tank to close in actual operation, and because the gas closing device needs to be closed and opened periodically and frequently, much energy is consumed in the process, the service life of the gas closing device is shortened, and the gas closing device is not easy to adjust. A motor in the first air closing device drives the turntable to rotate through the speed reducer, and the second connecting rod drives the fastening cylinder to reciprocate up and down under the action of the first connecting rod, the second connecting rod and the linear bearing;

when the tight closing cylinder moves downwards, the tight closing cylinder is not subjected to resistance of compressed gas in the low-pressure gas storage tank, or the resistance is very small, when the tight closing cylinder is contacted with the annular jacking block, the annular bulge A is contacted with the annular bulge B, and then the closing of the third ventilation opening is completed, so that the compressed gas in the low-pressure gas storage tank cannot enter the first air chamber.

The first air closing device and the second air closing device run in a staggered mode, when the tight closing cylinder in the first air closing device moves upwards, the tight closing cylinder of the second air closing device moves downwards, at the moment, compressed air in the low-pressure air storage tank enters the first air chamber through the third air vent and then enters the ventilation pipe through the first air vent and the third air chamber, and compressed air is further provided for the gangue box body; when the tight closing barrel in the first air closing device moves downwards, the tight closing barrel of the second air closing device moves upwards, and at the moment, air in the gangue box body enters a third air chamber through the ventilation pipe and is discharged to the outside through the second ventilation opening and the second air chamber. In conclusion, the water in the gangue box body has certain amplitude, and the purpose of pulse washing is achieved.

4. Raw coal enters a middling box body through a gangue sieve plate, a middling gate valve is opened, water in a main water pipe enters the middling box body through a middling water distribution pipe, the middling gate valve is closed after the water in the middling box body is enough, a low-pressure gas storage tank periodically exhausts and inhales the water in the middling box body through a middling three-chamber numerical control air box, so that the water in the middling box body forms washing water pulsation, raw materials on the middling sieve plate are screened, a middling layer is formed on the middling sieve plate due to the characteristics of the raw coal, and the middling layer on the middling sieve plate is discharged through a middling screening port and a middling discharge port under the action of a middling buoy device and a middling discharge unit.

5. Raw coal enters a secondary clean coal box body through a medium coal sieve plate, a secondary clean coal gate valve is opened, water in a main water pipe enters the secondary clean coal box body through a secondary clean coal water distribution pipe, the secondary clean coal gate valve is closed after the water in the secondary clean coal box body is enough, a low-pressure gas storage tank periodically exhausts and inhales the water in the secondary clean coal box body through a secondary clean coal two-chamber numerical control air box, so that the water in the secondary clean coal box body forms washing water pulsation, raw materials on the secondary clean coal sieve plate are screened, a secondary clean coal layer is formed on the secondary clean coal sieve plate due to the characteristics of the raw coal, and the secondary clean coal layer on the secondary clean coal sieve plate is discharged through a secondary clean coal screening port and a secondary clean coal discharge port under the action of a secondary clean coal buoy device and a secondary clean coal discharge unit, so that the obtained clean coal is discharged through the discharge port.

6. Bed layer height adjustment mechanism can adjust bed layer thickness according to the difference of penetrating sieve condition and coal quality, makes the separation waste rock layer that raw coal can be better, well coal seam and inferior clean coal layer.

7. The number of the ventilation pipes is two, so that the gas in the gangue box can be conveniently discharged.

8. A gap is formed between the outer side wall of the tight closing cylinder and the annular tight closing cavity, so that the outer side wall of the tight closing cylinder and the annular tight closing cavity can be prevented from being abraded, and noise caused by airflow convolution is reduced.

Drawings

Fig. 1 is a front view and a partial sectional view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a left side view of a gangue part of the present invention;

FIG. 4 is a left side view of the middle coal portion of the present invention;

FIG. 5 is a left side view of the secondary clean coal of the present invention;

FIG. 6 is a schematic view of the two-chamber numerical control bellows structure of the gangue of the present invention.

In the drawings: 1. a low pressure gas storage tank; 2. a main water pipe; 3. a gangue box body; 4. a gangue sieve plate; 5. a gangue screening port; 6. a gangue discharge unit; 7. a gangue buoy device; 8. two chambers of numerical control bellows of waste rock; 9. a gangue shunt pipe; 10. a gangue gate valve; 11. a first air chamber; 12. a second air chamber; 13. a third air chamber; 14. a first vent; 15. a second vent; 16. a vent pipe; 17. a first air-lock device; 18. a support; 19. a motor; 20. a speed reducer; 21. a turntable; 22. A first link; 23. a second link; 24. a fixed mount; 25. a linear bearing; 26. an annular closed chamber; 27. closing the barrel; 28. an annular projection A; 29. an annular projection B; 30. a connecting rod; 31. an annular jacking block; 32. a third vent; 33. A second air-lock device; 34. a middling box body; 35. a middling sieve plate; 36. a middling screening port; 37. a middling discharge port; 38. A middling discharging unit; 39. a middling buoy device; 40. a middling three-chamber numerical control air box; 41. a middling water diversion pipe; 42. a middling gate valve; 43. a secondary clean coal box body; 44. a secondary clean coal sieve plate; 45. a secondary clean coal screening port; 46. a secondary clean coal discharge unit; 47. A secondary clean coal buoy device; 48. a sub-clean coal two-chamber numerical control air box; 49. a secondary clean coal water diversion pipe; 50. a secondary clean coal gate valve; 51. Bed height adjusting mechanism.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Example 1

As shown in the attached drawings 1-6, the utility model discloses a low pressure gas holder 1, main water pipe 2, respectively with the waste rock part of low pressure gas holder 1 and main water pipe 2 intercommunication, respectively with the middlings part of low pressure gas holder 1 and main water pipe 2 intercommunication and respectively with the inferior clean coal part of low pressure gas holder 1 and main water pipe 2 intercommunication, the waste rock part is connected with the middlings part, the middlings part is connected with inferior clean coal part. The low-pressure air storage tank 1 can respectively provide compressed air for the gangue part, the middlings part and the secondary clean coal part, and the main water pipe 2 can respectively provide all water for coal washing for the gangue part, the middlings part and the secondary clean coal part.

The waste rock part includes waste rock box 3, the fixed waste rock sieve 4 that sets up at 3 inboards of waste rock box, set up in 3 inboards of waste rock box and be located the waste rock screening opening 5 on waste rock sieve 4 right side, set up at the left feed inlet of waste rock box 3, set up the waste rock bin outlet in 3 below of waste rock box, set up the waste rock row material unit 6 of waste rock bin outlet department, set up in waste rock box 3 and be located the waste rock buoy device 7 of waste rock sieve 4 top, set up the waste rock two rooms numerical control bellows 8 between waste rock box 3 and low pressure gas holder 1, set up the waste rock distributive pipe 9 between main water pipe 2 and waste rock box 3 and set up the waste rock gate valve 10 on the waste rock distributive pipe 9, in the waste rock box 3 and the part that is located the waste rock sieve 4 top communicate with the middlings part, waste rock buoy device 7 arranges material unit 6 signal connection with the waste rock, 4 downward slopping of sieve, waste rock buoy device 7 is located the right side portion of waste rock sieve 4, waste rock buoy device 7 is located the right side. Raw coal enters a waste rock box body 3 through a feed inlet, a waste rock gate valve 10 is opened, water in a main water pipe 2 enters the waste rock box body 3 through a waste rock water distribution pipe 9, the waste rock gate valve 10 is closed after the water in the waste rock box body 3 is enough, a low-pressure gas storage tank 1 exhausts and inhales the water in the waste rock box body 3 periodically through a waste rock two-chamber numerical control air box 8, the water in the waste rock box body 3 forms washing water pulsation, raw materials on a waste rock sieve plate 4 are screened, a waste rock layer is formed on the waste rock sieve plate 4 due to the characteristics of the raw coal, and the waste rock layer on the waste rock sieve plate 4 is discharged through a waste rock screening port 5 and a waste rock discharge port under the effects of a waste rock buoy device 7 and a waste rock discharge unit 6.

The two-chamber numerical control air box 8 for the gangue comprises a first air chamber 11, a second air chamber 12 which is arranged on the right side of the first air chamber 11 and is arranged in parallel with the first air chamber 11, a third air chamber 13 which is arranged below the second air chamber 12, a first ventilation opening 14 which is arranged between the first air chamber 11 and the third air chamber 13, a second ventilation opening 15 which is arranged between the second air chamber 12 and the third air chamber 13 and a ventilation pipe 16 which is arranged between the third air chamber 13 and the gangue box body 3, wherein the first air chamber 11 is provided with a first air closing device 17;

the first air closing device 17 comprises a bracket 18 fixedly arranged above the first air chamber 11, a motor 19 arranged at the top of the bracket 18, a speed reducer 20 fixedly arranged between the outer side wall of the top of the bracket 18 and the motor 19, a rotary disc 21 arranged at the inner side of the bracket 18 and fixedly connected with the output shaft of the speed reducer 20, a first connecting rod 22 of which the upper end is rotatably connected with the eccentric part of the rotary disc 21 and is positioned at the inner side of the bracket 18, a second connecting rod 23 of which the upper end is rotatably connected with the lower end of the connecting rod, a fixed frame 24 fixedly arranged at the top of the first air chamber 11 and a fastening device arranged on the second connecting rod 23, wherein the second connecting rod 23 penetrates through the fixed frame 24, and a linear bearing 25 is arranged between the second connecting rod 23 and the fixed frame 24;

the fastening device comprises an annular fastening cavity 26 which is fixed in an L shape in cross section and is positioned inside the first air chamber 11, a fastening barrel 27 which is arranged inside the annular fastening cavity 26, an annular bulge A28 which is fixedly arranged at the edge of the upper end of the fastening barrel 27, an annular bulge B29 which is fixedly arranged on the annular fastening cavity 26 and is arranged inside the annular fastening cavity 26, a connecting rod 30 which is fixedly arranged between the fastening barrel 27 and the second connecting rod 23, and an annular jacking block 31 which is fixedly arranged inside the bottom end of the first air chamber 11, wherein the annular bulge A28 is positioned above the annular bulge B29, the annular bulge A28 is matched with the annular bulge B29, and the fastening barrel 27 is matched with the annular jacking block 31;

a third air vent 32 is arranged below the first air chamber 11, the lower part of the third air vent 32 is communicated with the low-pressure air storage tank 1, the tight closing barrel 27 is positioned above the third air vent 32, the first air vent is positioned on the right side of the tight closing barrel 27, the annular jacking block 31 is coaxial with the third air vent 32, and the diameter of the annular jacking block 31 is larger than that of the third air vent 32;

the second air chamber 12 is provided with a second air closing device 33, the structure of the second air closing device 33 is the same as that of the first air closing device 17, the first air closing device 17 and the second air closing device 33 operate in a staggered mode, the locking cylinder 27 on the second air closing device 33 is positioned above the second air opening, and the right side of the second air chamber 12 is communicated with the outside.

The conventional gas closing device needs to overcome the resistance of the compressed gas in the low-pressure gas storage tank 1 to close in actual operation, and because the gas closing device needs to be closed and opened periodically and frequently, much energy is consumed in the process, the service life of the gas closing device is shortened, and the gas closing device is not easy to adjust. A motor 19 in the first air-lock device 17 drives a turntable 21 to rotate after passing through a speed reducer 20, and a second connecting rod 23 drives a fastening cylinder 27 to reciprocate up and down under the action of a first connecting rod 22, the second connecting rod 23 and a linear bearing 25;

when the fastening cylinder 27 moves downward, the fastening cylinder 27 is not subjected to the resistance of the compressed gas in the low-pressure gas tank 1, or the resistance is extremely small, and when the fastening cylinder 27 contacts the annular jacking block 31, the annular protrusion a28 contacts the annular protrusion B29, so that the third ventilation opening is closed, and the compressed gas in the low-pressure gas tank 1 cannot enter the first air chamber 11.

The first air closing device 17 and the second air closing device 33 run in a staggered mode, when the tight closing cylinder 27 in the first air closing device 17 moves upwards, the tight closing cylinder 27 of the second air closing device 33 moves downwards, at the moment, compressed air in the low-pressure air storage tank 1 enters the first air chamber 11 through the third air vent and then enters the ventilation pipe 16 through the first air vent 14 and the third air chamber 13, and compressed air is further provided for the gangue box body 3; when the tightly closing barrel 27 in the first air closing device 17 moves downwards, the tightly closing barrel 27 in the second air closing device 33 moves upwards, and at the moment, air in the gangue box body 3 enters the third air chamber 13 through the ventilation pipe 16 and is exhausted to the outside through the second ventilation opening 15 and the second air chamber 12. In conclusion, the water in the gangue box 3 has certain amplitude, and the purpose of pulse washing is achieved.

The middling part comprises a middling box body 34, a middling screen plate 35 fixedly arranged on the inner side of the middling box body 34, a middling screening opening 36 arranged on the inner side of the middling box body 34 and located on the right side of the middling screen plate 35, a middling discharge opening 37 arranged below the middling box body 34, a middling discharge unit 38 arranged at the middling discharge opening 37, a middling buoy device 39 arranged in the middling box body 34 and located above the middling screen plate 35, a middling three-chamber numerical control air box 40 arranged between the middling box body 34 and the low-pressure air storage tank 1, a middling water distribution pipe 41 arranged between the main water pipe 2 and the middling box body 34 and a middling gate valve 42 arranged on a middling water distribution pipe 41, the parts in the middling box body 34 and located above the middling screen plate 35 are respectively communicated with a middling part and a secondary clean coal part, the middling buoy device 39 is in signal connection with the middling discharge unit 38, the middling screen plate 35 inclines downwards, the middling buoy device 39 is located at the right end part of the middling screen plate 35, and the middling screening opening 36 is located on the right side of the middling screen plate 39. Raw coal enters the middling box body 34 through the gangue sieve plate 4, the middling gate valve 42 is opened, water in the main water pipe 2 enters the middling box body 34 through the middling water distribution pipe 41, the middling gate valve 42 is closed after the water in the middling box body 34 is enough, the low-pressure gas storage tank 1 periodically exhausts and inhales the water in the middling box body 34 through the middling three-chamber numerical control air box 40, so that the water in the middling box body 34 forms washing water pulsation, raw materials on the middling sieve plate 35 are screened, a middling layer is formed on the middling sieve plate 35 due to the characteristics of the raw coal, the middling layer on the middling sieve plate 35 is discharged through the middling screening port 36 and the middling discharging port 37 under the action of the middling buoy device 39 and the middling discharge unit 38, and the principle of the middling three-chamber numerical control air box 40 is the same as that of the gangue two-chamber numerical control air box 8.

Inferior clean coal part includes inferior clean coal box 43, the fixed inferior clean coal sieve plate 44 that sets up in inferior clean coal box 43 inboard, set up in inferior clean coal box 43 inboard and be located inferior clean coal screening mouth 45 on inferior clean coal sieve plate 44 right side, set up the discharge gate on inferior clean coal box 43 right side, set up the inferior clean coal bin outlet in inferior clean coal box 43 below, set up inferior clean coal row material unit 46 at inferior clean coal bin outlet, set up in inferior clean coal box 43 and be located inferior clean coal buoy device 47 of inferior clean coal sieve plate 44 top, set up inferior clean coal two-chamber numerical control bellows 48 between inferior clean coal box 43 and low pressure gas holder 1, set up inferior clean coal shunt pipe 49 between main water pipe 2 and inferior clean coal box 43 and set up inferior clean coal gate valve 50 on inferior clean coal shunt pipe 49, inferior clean coal box 43 in and the part that is located inferior clean coal sieve plate 44 top communicate with the middling coal part, inferior clean coal buoy device 47 is connected with inferior clean coal unit 46 signal, inferior clean coal gate valve 44, inferior clean coal buoy device 44 is located inferior clean coal sieve plate 44 downward sloping from left to right side the right side clean coal screening mouth 45 the inferior clean coal sieve plate 47 is located inferior clean coal discharge gate valve device. Raw coal enters the secondary clean coal box 43 through the medium coal sieve plate 35, the secondary clean coal gate valve 50 is opened, water in the main water pipe 2 enters the secondary clean coal box 43 through the secondary clean coal water distribution pipe 49, the secondary clean coal gate valve 50 is closed after the water in the secondary clean coal box 43 is enough, the low-pressure gas storage tank 1 exhausts and inhales gas to the water in the secondary clean coal box 43 periodically through the secondary clean coal two-chamber numerical control air box 48, so that the water in the secondary clean coal box 43 forms washing water pulsation, raw materials on the secondary clean coal sieve plate 44 are screened, a secondary clean coal layer is formed on the secondary clean coal sieve plate 44 due to the characteristics of the raw coal, and the secondary clean coal layer on the secondary clean coal sieve plate 44 is discharged through the secondary clean coal screening port 45 and the secondary clean coal discharge port under the effects of the secondary clean coal buoy device 47 and the secondary clean coal discharge unit 46, and the obtained clean coal is discharged through the discharge port. The structure of the secondary clean coal two-chamber numerical control air box 48 is the same as that of the gangue two-chamber numerical control air box 8

The bed height adjusting mechanism 51 is arranged on the right side of the secondary clean coal box 43. The bed height adjusting mechanism 51 can adjust the bed thickness according to the different of the condition of passing through the sieve and the coal quality, so that the raw coal can better separate a gangue layer, a medium coal layer and a secondary clean coal layer.

Example 2

As shown in attached figures 1-6, based on the embodiment 1, the number of the ventilating pipes is two, so that the gas in the gangue box body 3 can be conveniently discharged.

Example 3

As shown in fig. 1-6, based on embodiment 1 and embodiment 2, the outer sidewall of the fastening cylinder 27 has a gap with the annular fastening cavity 26. The abrasion between the outer side wall of the locking cylinder 27 and the annular locking chamber 26 can be prevented, and the noise caused by the whirling of the airflow can be reduced.

For convenience of control, butterfly valves for controlling air flow may be provided on the vent pipes in embodiments 1, 2, and 3, respectively.

At present, the technical scheme of the application has been subjected to a pilot plant test, namely a small-scale experiment before large-scale mass production of products; after the pilot test is finished, the investigation for the use of the user is carried out in a small range, and the investigation result shows that the satisfaction degree of the user is higher; the preparation of products for formal production for industrialization (including intellectual property risk early warning research) has been set forth.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (8)

1. The utility model provides a coal dressing jigging machine with easily adjust numerical control bellows which characterized in that: including low pressure gas holder (1), main water pipe (2), respectively with the waste rock part of low pressure gas holder (1) and main water pipe (2) intercommunication, respectively with the middlings part of low pressure gas holder (1) and main water pipe (2) intercommunication and respectively with the inferior clean coal part of low pressure gas holder (1) and main water pipe (2) intercommunication, the waste rock part is connected with the middlings part, the middlings part is connected with inferior clean coal part.

2. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 1, is characterized in that: the waste rock part includes waste rock box (3), fixed set up in waste rock box (3) inboard waste rock sieve (4), set up in waste rock box (3) inboard and be located waste rock sieve (4) right side waste rock screening opening (5), set up at the left feed inlet of waste rock box (3), set up the waste rock bin outlet in waste rock box (3) below, set up at waste rock discharge unit (6) of waste rock bin outlet department, set up in waste rock box (3) and be located waste rock buoy device (7) of waste rock sieve (4) top, set up waste rock two rooms numerical control bellows (8) between waste rock box (3) and low pressure gas holder (1), set up at main water pipe (2) and waste rock box (3) between waste rock shunt tube (9) and set up waste rock gate valve (10) on waste rock shunt tube (9), the part that is located waste rock sieve (4) top in waste rock box (3) and is linked together with the middlings part, waste rock float device (7) and waste rock sieve screening opening (6) are located waste rock sieve (4) right side waste rock sieve screening opening (7) discharge unit (7) the waste rock buoy device (7) is located from left to right side.

3. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 2, is characterized in that: the two-chamber numerical control air box (8) for the gangue comprises a first air chamber (11), a second air chamber (12) which is arranged on the right side of the first air chamber (11) and is arranged in parallel with the first air chamber (11), a third air chamber (13) which is arranged below the second air chamber (12), a first ventilation opening (14) which is arranged between the first air chamber (11) and the third air chamber (13), a second ventilation opening (15) which is arranged between the second air chamber (12) and the third air chamber (13) and a ventilation pipe (16) which is arranged between the third air chamber (13) and the gangue box body (3), wherein a first air closing device (17) is arranged in the first air chamber (11);

the first air closing device (17) comprises a support (18) fixedly arranged above the first air chamber (11), a motor (19) arranged at the top of the support (18), a speed reducer (20) fixedly arranged between the outer side wall of the top of the support (18) and the motor (19), a rotary disc (21) arranged at the inner side of the support (18) and fixedly connected with an output shaft of the speed reducer (20), a first connecting rod (22) with the upper end rotatably connected to the eccentric part of the rotary disc (21) and positioned at the inner side of the support (18), a second connecting rod (23) with the upper end rotatably connected with the lower end of the connecting rod, a fixed frame (24) fixedly arranged at the top of the first air chamber (11) and a closing device arranged on the second connecting rod (23), wherein the second connecting rod (23) penetrates through the fixed frame (24), and a linear bearing (25) is arranged between the second connecting rod (23) and the fixed frame (24);

the tight closing device comprises an annular tight closing cavity (26) which is fixed on the inner side of the first air chamber (11) and has an L-shaped section, a tight closing cylinder (27) which is arranged on the inner side of the annular tight closing cavity (26), an annular bulge A (28) which is fixedly arranged at the edge of the upper end of the tight closing cylinder (27), an annular bulge B (29) which is fixedly arranged on the annular tight closing cavity (26) and is arranged on the inner side of the annular tight closing cavity (26), a connecting rod (30) which is fixedly arranged between the tight closing cylinder (27) and the second connecting rod (23) and an annular jacking block (31) which is fixedly arranged on the inner side of the bottom end of the first air chamber (11), wherein the annular bulge A (28) is arranged above the annular bulge B (29), the annular bulge A (28) is matched with the annular bulge B (29), and the tight closing cylinder (27) is matched with the annular jacking block (31);

a third air vent (32) is arranged below the first air chamber (11), the lower part of the third air vent (32) is communicated with the low-pressure air storage tank (1), the tight closing barrel (27) is positioned above the third air vent (32), the first air vent is positioned on the right side of the tight closing barrel (27), the annular jacking block (31) is coaxial with the third air vent (32), and the diameter of the annular jacking block (31) is larger than that of the third air vent (32);

the second air chamber (12) is provided with a second air closing device (33), the structure of the second air closing device (33) is the same as that of the first air closing device (17), the first air closing device (17) and the second air closing device (33) run in a staggered mode, a fastening cylinder (27) on the second air closing device (33) is located above the second air opening, and the right side of the second air chamber (12) is communicated with the outside.

4. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 3, wherein: the middlings part comprises a middlings box body (34), a middlings sieve plate (35) fixedly arranged on the inner side of the middlings box body (34), a middlings screening opening (36) arranged on the inner side of the middlings box body (34) and located on the right side of the middlings sieve plate (35), a middlings discharge opening (37) arranged below the middlings box body (34), a middlings discharge unit (38) arranged at the middlings discharge opening (37), a middlings float device (39) arranged in the middlings box body (34) and located above the middlings sieve plate (35), a middlings three-chamber numerical control air box (40) arranged between the middlings box body (34) and the low-pressure air storage tank (1), a middlings water diversion pipe (41) arranged between the main water pipe (2) and the middlings box body (34) and a middlings gate valve (42) arranged on the middlings water diversion pipe (41), the part inside the middlings box body (34) and located above the middlings sieve plate (35) is respectively communicated with a gangue part and a secondary clean coal part, the middlings float device (39) is connected with the middlings sieve plate (39), and the middlings float device (39) is located on the right side of the middlings discharge unit (39), and is connected with the middlings sieve plate (39) and located at the middlings discharge unit (39).

5. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 4, wherein: the secondary clean coal part comprises a secondary clean coal box body (43), a secondary clean coal screening plate (44) fixedly arranged on the inner side of the secondary clean coal box body (43), a secondary clean coal screening hole (45) arranged on the inner side of the secondary clean coal box body (43) and positioned on the right side of the secondary clean coal screening plate (44), a discharge hole arranged on the right side of the secondary clean coal box body (43), a secondary clean coal discharge hole arranged below the secondary clean coal box body (43), a secondary clean coal discharge unit (46) arranged at the secondary clean coal discharge hole, a secondary clean coal buoy device (47) arranged in the secondary clean coal box body (43) and positioned above the secondary clean coal screening plate (44), a secondary clean coal two-chamber numerical control air bellow (48) arranged between the secondary clean coal box body (43) and the low-pressure air storage tank (1), a secondary clean coal water distribution pipe (49) arranged between the main water pipe (2) and the secondary clean coal box body (43) and a secondary clean coal distribution pipe (50) arranged on the secondary clean coal distribution pipe (49), the part in the secondary clean coal box body (43) and above the secondary clean coal sieve plate (44) is communicated with the middling part, the secondary clean coal buoy device (47) is in signal connection with the secondary clean coal discharge unit (46), the secondary clean coal sieve plate (44) inclines downwards from left to right, the secondary clean coal buoy device (47) is positioned at the right end part of the secondary clean coal sieve plate (44), and the secondary clean coal screening opening (45) is positioned on the right side of the secondary clean coal buoy device (47).

6. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 5, wherein: and a bed height adjusting mechanism (51) is arranged on the right side of the secondary clean coal box body (43).

7. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 6, wherein: the number of the ventilation pipes (16) is two.

8. The coal preparation jigger with the easily-adjustable numerical control air box as claimed in claim 7, is characterized in that: a gap is reserved between the outer side wall of the fastening barrel (27) and the annular fastening cavity (26).

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