Automatic dry coal separator for coal mine

Abstract

The utility model provides an automatic dry coal separator for a coal mine, which belongs to the technical field of dry coal separation and comprises a support table, a conveyor belt and support legs, the conveyor belt is arranged in the support table, the support legs are arranged at one side end of the support table, a rolling cabin is positioned at the upper end of the support legs, and the rolling cabin is positioned at the upper end of the conveyor belt. Raw coal enters the material pouring box and then enters the rolling cabin, the motor drives the gear to operate so that the gear can be meshed with the gear ring, the raw coal in the rolling cabin can roll over when the rolling cabin rotates, the motor drives the gear to operate so that the gear can be meshed with the gear ring, and the raw coal in the rolling cabin can roll over when the rolling cabin rotates. In this way, middling coal, clean coal and gangue can be conveniently screened in the later period. According to the dry-method coal separation device, the dry-method coal separation efficiency is improved, so that raw coal is quickly distinguished, various separated coals are not mixed together, and later distinguishing and selection are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry coal preparation, and in particular relates to an automatic dry coal preparation machine for coal mines. Background Art

[0002] Dry coal separation uses the inertial force generated by the vibration of the bed surface to make the materials near the bed surface in the lower layer do spiral turning motion from the discharge side to the back plate direction. Due to the obstruction of the back plate, the materials are guided to turn upward. Coal with low density goes to the upper layer first. The upper layer materials are less affected by the vibration of the bed surface. Under the action of gravity and the thrust of the back plate, they slide down along the surface layer to the discharge side, and the part of the coal with the smallest surface density and low ash content is stripped off through the discharge baffle. The remaining materials continue to make the next cycle of cyclic motion. Due to the vibration force and the pressure of the materials continuously entering the separation bed, the continuously turning materials form a nearly spiral motion and move toward the gangue end. As the width of the bed surface gradually decreases, the surface coal is continuously stripped off, and the materials are sorted multiple times until the gangue and pyrite are finally discharged.

[0003] The authorized utility model publication number "CN114162578B" records "a gangue discharge outlet buffer device for a dry intelligent coal preparation system, which includes a discharge pipe, and the inner wall of the discharge pipe is fixed with a plurality of downwardly inclined buffer plates arranged in sequence from top to bottom, and the plurality of buffer plates are arranged in sequence from top to bottom and staggered with each other, and a buffer layer is provided on the buffer plate, and the buffer plate is fixedly connected to the discharge pipe by a connecting device, and the connecting device includes a connecting block, a connecting bolt and a connecting plate, and the connecting plate is fixedly connected to the buffer plate, and the angle between the connecting plate and the buffer plate is an acute angle, and a slot is provided on the connecting plate. In the utility model, the gangue falls onto the buffer layer of the topmost buffer plate, and rolls from the topmost buffer plate to the buffer layer of the buffer plate below it, and rolls down in sequence, which can reduce the noise when the gangue rolls down; and the buffer device can reduce the speed at which the gangue falls onto the conveyor, thereby reducing the impact on the conveyor when it falls."

[0004] The above patent can reduce the speed of gangue falling onto the conveyor through a buffer device, thereby reducing the impact on the conveyor when falling. However, the above patent is difficult to distinguish the raw coal when performing dry coal preparation, which will cause a small amount of medium coal, fine coal and gangue to be mixed together, which will lead to the need for re-screening at a later stage. Summary of the invention

[0005] The utility model aims to provide an automatic dry coal separation machine for coal mines, aiming to solve the problem in the prior art that it is difficult to distinguish raw coal during dry coal separation, which causes a small amount of medium coal, fine coal and gangue to be mixed together, resulting in the need for re-screening at a later stage.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An automatic dry coal separation machine for coal mines, comprising:

[0008] Support table;

[0009] A conveyor belt, wherein the conveyor belt is arranged in the support platform;

[0010] A supporting leg, the supporting leg being arranged at one side end of the supporting platform;

[0011] A rolling cabin, the rolling cabin is located at the upper end of the supporting legs, and the rolling cabin is located at the upper end of the conveyor belt;

[0012] A material pouring box is arranged at one side end of a supporting leg, and the supporting leg is located in the rolling chamber.

[0013] It further comprises: a gear ring, the gear ring being fixedly connected to the circumferential surface of the rolling chamber;

[0014] A bottom plate, the bottom plate being fixedly connected to one side end of the supporting leg;

[0015] A motor, wherein the motor is fixedly connected to the upper end of the bottom plate;

[0016] The gear is fixedly connected to the output shaft of the motor, and the gear is meshed with the gear ring.

[0017] It further comprises: an inclined plate, the inclined plate being fixedly connected in the pouring box; and

[0018] A discharge mechanism, which is arranged at the upper end of the conveyor belt to discharge and filter dust in the raw coal;

[0019] A sieve plate with sieve holes is arranged at the rear of the rolling cabin; the X-ray source and the signal receiving device are arranged on both sides of the conveyor belt, and the signal receiving device receives the ray transmission signal emitted by the X-ray source that penetrates the medium coal, clean coal and gangue; corresponding to the signal receiving device, large-power air guns are respectively arranged for spraying the medium coal, clean coal and gangue, and multiple large-power air guns respectively receive the identification signals of the medium coal, clean coal and gangue, and blow the medium coal, clean coal and gangue into different collection cabins in time.

[0020] Preferably, the discharge mechanism includes an ash discharge pipe, an ash cover, a slot, a filter, a handle, a fan, a bolt, a support rod and two second baffles. The ash cover is fixedly connected to the upper end of the support platform, the ash discharge pipe is fixedly connected to the upper end of the ash cover, the slot is opened at the upper end of the ash discharge pipe, the filter is located in the slot, the handle is fixedly connected to the upper end of the filter, the two second baffles are respectively fixedly connected to the two side ends of the ash discharge pipe, the fan is arranged in the ash discharge pipe, the support rods are respectively fixedly connected to one side end of the fan, a threaded hole is opened at one side end of the support rod, the bolt is arranged in the ash discharge pipe, the bolt is threadedly connected to the threaded hole, and the rolling cabin is located in the ash cover.

[0021] Preferably, a support plate is fixedly connected between the inner walls on both sides of the support platform, a signal receiver is provided at the upper end of the support plate, and a blowing device box is provided inside the support platform. A collection cabin is fixedly connected to one side end of the support platform, a first baffle is fixedly connected to the upper end of the collection cabin, and two blocking plates are fixedly connected to the upper end of the collection cabin. A protective ring is fixedly connected to the circumferential surface of the rolling cabin, and the protective ring is provided at one side end of the gear ring.

[0022] Preferably, the surface of the conveyor belt is provided with a protective edge strip, and the material of the protective edge strip is rubber. The upper end of the support platform is fixedly connected with a triangular plate, and the triangular plate is located at the upper end of the first baffle. Both side ends of the support leg are fixedly connected with a protective plate, and the material of the protective plate is plastic. One side end of the dust cover is fixedly connected with a soft baffle, and the material of the soft baffle is rubber.

[0023] As a preferred solution of the utility model, the material of the dustproof cover is stainless steel.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. In this scheme, the raw coal is poured into the pouring box, and when it enters the rolling chamber, the motor drives the gear to mesh with the gear ring, and the rolling chamber rotates, and the raw coal inside it will tumble. The raw coal is driven by the motor to mesh with the gear ring, and the rolling chamber rotates, and the raw coal inside it will tumble. In this way, lump coal and fine coal can be screened, which is convenient for the later screening of medium coal, clean coal and gangue, and the efficiency of dry coal preparation is improved. In this way, the raw coal can be quickly distinguished, and the medium coal, clean coal and gangue are not mixed together, which is convenient for the later distinction and selection.

[0026] 2. In this solution, the protective edge strips can limit the medium coal, clean coal and gangue, so as to prevent the raw coal from shifting to both sides and falling during transportation. The material of the protective edge strips is rubber, so it can cooperate with the conveyor belt and prevent it from breaking.

[0027] 3. In this solution, a protective plate can be used to protect the internal gears and gear rings from contact with the outside, so that when people are around, their safety can be protected and they will not come into contact with them. A soft baffle can be placed on one side of the dust cover to prevent dust from spreading outwards. Since the soft baffle is made of rubber, it will not affect the operation of medium coal, clean coal and gangue, and is convenient for dust preservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is the main stereoscopic view in the utility model;

[0030] Figure 2 It is the first sectional stereoscopic view in the utility model;

[0031] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle A;

[0032] Figure 4 This is the first exploded view of the present utility model;

[0033] Figure 5 For the utility model Figure 1 A partial enlarged view of the middle ash discharge pipe;

[0034] Figure 6 It is the second sectional stereoscopic view in the utility model;

[0035] Figure 7 It is a rear perspective view in the utility model;

[0036] Figure 8 For the utility model Figure 1 A partial enlarged view of the middle collection chamber.

[0037] In the figure: 1. support platform; 2. triangular plate; 3. conveyor belt; 4. protective edge strip; 5. soft baffle; 601. dump box; 602. rolling cabin; 603. gear ring; 604. support leg; 605. inclined plate; 606. gear; 607. bottom plate; 608. motor; 7. ash cover; 8. protective plate; 9. collection cabin; 10. first baffle; 11. barrier plate; 12. air blowing equipment box; 13. support plate; 14. signal receiver; 1501. ash discharge pipe; 1502. slot; 1503. filter; 1504. handle; 1505. second baffle; 1506. fan; 1507. support rod; 1508. bolt; 16. protective ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The utility model discloses an automatic dry coal separation machine for coal mines, comprising:

[0040] Support table;

[0041] A conveyor belt, wherein the conveyor belt is arranged in the support platform;

[0042] A supporting leg, the supporting leg being arranged at one side end of the supporting platform;

[0043] A rolling cabin, the rolling cabin is located at the upper end of the supporting legs, and the rolling cabin is located at the upper end of the conveyor belt;

[0044] A material pouring box is arranged at one side end of a supporting leg, and the supporting leg is located in the rolling chamber.

[0045] It further comprises: a gear ring, the gear ring being fixedly connected to the circumferential surface of the rolling chamber;

[0046] A bottom plate, the bottom plate being fixedly connected to one side end of the supporting leg;

[0047] A motor, wherein the motor is fixedly connected to the upper end of the bottom plate;

[0048] The gear is fixedly connected to the output shaft of the motor, and the gear is meshed with the gear ring.

[0049] It further comprises: an inclined plate, the inclined plate being fixedly connected in the pouring box; and

[0050] The discharge mechanism is arranged at the upper end of the conveyor belt to discharge and filter the dust in the raw coal.

[0051] Preferably, the discharge mechanism includes an ash discharge pipe, an ash cover, a slot, a filter, a handle, a fan, a bolt, a support rod and two second baffles. The ash cover is fixedly connected to the upper end of the support platform, the ash discharge pipe is fixedly connected to the upper end of the ash cover, the slot is opened at the upper end of the ash discharge pipe, the filter is located in the slot, the handle is fixedly connected to the upper end of the filter, the two second baffles are respectively fixedly connected to the two side ends of the ash discharge pipe, the fan is arranged in the ash discharge pipe, the support rods are respectively fixedly connected to one side end of the fan, a threaded hole is opened at one side end of the support rod, the bolt is arranged in the ash discharge pipe, the bolt is threadedly connected to the threaded hole, and the rolling cabin is located in the ash cover.

[0052] Preferably, a support plate is fixedly connected between the inner walls on both sides of the support platform, a signal receiver is provided at the upper end of the support plate, and a blowing device box is provided inside the support platform. A collection cabin is fixedly connected to one side end of the support platform, a first baffle is fixedly connected to the upper end of the collection cabin, and two blocking plates are fixedly connected to the upper end of the collection cabin. A protective ring is fixedly connected to the circumferential surface of the rolling cabin, and the protective ring is provided at one side end of the gear ring.

[0053] Preferably, the surface of the conveyor belt is provided with a protective edge strip, and the material of the protective edge strip is rubber. The upper end of the support platform is fixedly connected with a triangular plate, and the triangular plate is located at the upper end of the first baffle. Both side ends of the support leg are fixedly connected with a protective plate, and the material of the protective plate is plastic. One side end of the dust cover is fixedly connected with a soft baffle, and the material of the soft baffle is rubber.

[0054] The present invention is further described below in conjunction with the accompanying drawings. Figure 1-Figure 8 , the utility model provides the following technical solutions:

[0055] An automatic dry coal separation machine for coal mines, comprising:

[0056] Support table 1;

[0057] A conveyor belt 3, wherein the conveyor belt 3 is arranged in the support platform 1;

[0058] Support leg 604, support leg 604 is arranged at one side end of support platform 1;

[0059] A rolling cabin 602, the rolling cabin 602 is located at the upper end of the supporting leg 604, and the rolling cabin 602 is located at the upper end of the conveyor belt 3;

[0060] A material dumping box 601, which is disposed at one side end of a support leg 604, and the support leg 604 is located in the rolling chamber 602;

[0061] A gear ring 603, the gear ring 603 is fixedly connected to the circumferential surface of the rolling chamber 602;

[0062] A bottom plate 607, the bottom plate 607 is fixedly connected to one side end of the supporting leg 604;

[0063] Motor 608, motor 608 is fixedly connected to the upper end of the bottom plate 607;

[0064] Gear 606, gear 606 is fixedly connected to the output shaft of motor 608, and gear 606 and gear ring 603 are meshed with each other;

[0065] Inclined plate 605, which is fixedly connected to the pouring box 601; and

[0066] The discharge mechanism is arranged at the upper end of the conveyor belt 3 to discharge and filter the dust in the raw coal;

[0067] A sieve plate with sieve holes is arranged at the rear of the rolling cabin; the X-ray source and the signal receiving device are arranged on both sides of the conveyor belt, and the signal receiving device receives the ray transmission signal emitted by the X-ray source that penetrates the medium coal, clean coal and gangue; corresponding to the signal receiving device, large-power air guns are respectively arranged for spraying the medium coal, clean coal and gangue, and multiple large-power air guns respectively receive the identification signals of the medium coal, clean coal and gangue, and blow the medium coal, clean coal and gangue into different collection cabins in time.

[0068] In a specific embodiment of the present utility model, the raw coal that needs dry coal selection is poured into the pouring box 601, and the discharge pipe of the inclined plate 605 is used to make all the raw coal enter the rolling chamber 602, and the motor 608 is started to drive the gear 606 to run, so that it meshes with the ring gear 603, so that the rolling chamber 602 can be driven to rotate. Since the pouring box 601 is in an independent state, the pouring box 601 will not rotate, and the rolling chamber 602 is limited by the support legs 604, so that the rolling chamber 602 will not shake and maintain its stability. The motor 608 can be kept stable by the bottom plate 607 to give it a supporting force. When the rolling chamber 602 rotates, the raw coal inside it will roll. The rolling chamber for coal selection utilizes the accelerated rotation or high-speed rotation of the rolling chamber to subject the raw coal to the dual effects of centrifugal force and gravity in the rolling chamber, thereby realizing the screening and grading of lump coal and fine coal. That is, the raw coal is subjected to the centrifugal force and gravity when passing through the rolling chamber 602, and the lump coal and the fine coal are screened (the lump coal and the fine coal are separated). A sieve plate with sieve holes is set at the rear of the rolling chamber 602, and the diameter of the sieve holes is 5 mm, and a fine coal collection chamber is set below the sieve holes. The fine coal enters the fine coal collection chamber through the sieve holes of the sieve plate. That is, when the lump coal and the fine coal that have been preliminarily screened by the rolling chamber 602 pass through the sieve holes at the rear of the rolling chamber 602, the fine coal enters the fine coal collection chamber through the sieve holes, and the lump coal falls separately on the upper end of the conveyor belt 3 through the opening of the rolling chamber 602, that is, the lump coal and the fine coal are separated. The selected lump coal includes medium coal, clean coal and gangue in the raw coal. The support platform 1 can be used to limit the conveyor belt 3. When the personnel start the conveyor belt 3 electrically connected to the external power supply to rotate, the medium coal, clean coal and gangue can be driven to move forward. This makes it convenient to further screen the medium coal, clean coal and gangue in the later stage, improve the efficiency of dry coal separation, and quickly distinguish the raw coal. At the same time, it is convenient to distinguish or sort the medium coal, clean coal and gangue in the later stage.

[0069] When the lump coal sorted by the rolling chamber 602 passes through the conveyor belt, it is subjected to secondary sorting by X-rays, and the different densities of the medium coal, clean coal and gangue are used to identify them through X-rays, and then the medium coal, clean coal and gangue are sorted. The X-ray source and the signal receiving device are arranged on both sides of the conveyor belt, and the signal receiving device receives the ray transmission signal of the medium coal, clean coal and gangue emitted by the X-ray source; corresponding to the signal receiving device, large-power air guns for blowing the medium coal, clean coal and gangue are respectively set, and multiple large-power air guns receive the identification signals of the medium coal, clean coal and gangue respectively, and blow the medium coal, clean coal and gangue into different collection chambers in time.

[0070] Furthermore, after the raw coal falls into the upper end of the conveyor belt 3, the dust in the raw coal can be discharged and the raw coal screening can be protected through the set discharge mechanism, which effectively improves the dust filtration and makes the raw coal clean.

[0071] For details, please refer to Figure 5 The discharge mechanism includes an ash discharge pipe 1501, an anti-ash cover 7, a slot 1502, a filter 1503, a handle 1504, a fan 1506, a bolt 1508, a support rod 1507 and two second baffles 1505. The anti-ash cover 7 is fixedly connected to the upper end of the support platform 1, the ash discharge pipe 1501 is fixedly connected to the upper end of the anti-ash cover 7, the slot 1502 is opened at the upper end of the ash discharge pipe 1501, the filter 1503 is located in the slot 1502, and the handle 15 04 is fixedly connected to the upper end of the filter screen 1503, the two second baffles 1505 are respectively fixedly connected to the two side ends of the ash discharge pipe 1501, the fan 1506 is arranged in the ash discharge pipe 1501, the support rod 1507 is respectively fixedly connected to one side end of the fan 1506, and a threaded hole is opened on one side end of the support rod 1507, the bolt 1508 is arranged in the ash discharge pipe 1501, the bolt 1508 is threadedly connected to the threaded hole, and the rolling cabin 602 is located in the ash cover 7.

[0072] In this embodiment: the slot 1502, filter screen 1503 and the like of the device are provided with two groups. When the medium coal, clean coal and gangue fall into the conveyor belt 3, the medium coal, clean coal and gangue can be protected by the ash cover 7 when they fall, so that the medium coal, clean coal and gangue will not be thrown away. The falling of raw coal will generate dust. The fan 1506 electrically connected to the external power supply is started to generate wind force to suck the gas in the ash cover 7 outward. In the process of sucking outward, the gas can be sucked out through the filter screen 1503 provided in the slot 1502. 503 can quickly filter dust, and the support rod 1507 can be fixed by threading the bolt 1508 with the threaded hole, so that the fan 1506 will not fall, thereby protecting its stability. The second baffle 1505 can be used to block the gas from flowing out from both sides of the fan 1506. After the device is used, the staff can hold the handle 1504 to lift out the filter 1503 for cleaning, which effectively improves the quickness and convenience of disassembly and assembly, discharges the dust in the raw coal, and keeps the raw coal clean.

[0073] For details, please refer to Figure 6-Figure 8 A support plate 13 is fixedly connected between the inner walls on both sides of the support platform 1, a signal receiver 14 is provided at the upper end of the support plate 13, and a blowing device box body 12 is provided in the support platform 1.

[0074] In this embodiment: the signal receiver 14 can be limited by the support plate 13 to keep the signal receiver 14 stable. When the medium coal, clean coal and gangue move forward in a dispersed state, the signal receiver 14 can be used to detect the medium coal, clean coal and gangue in the raw coal, and the high-power air gun set in the blowing equipment box 12 is used to blow the medium coal, clean coal and gangue to different places (collection cabins). Since the qualities of the medium coal, clean coal and gangue are different, the blowing force of the air gun may also be different, so that automated dry coal separation can be achieved and production efficiency can be improved.

[0075] For details, please refer to Figure 8 A collecting chamber 9 is fixedly connected to one side end of the supporting platform 1 , a first baffle 10 is fixedly connected to the upper end of the collecting chamber 9 , and two blocking plates 11 are fixedly connected to the upper end of the collecting chamber 9 .

[0076] In this embodiment: the medium coal, clean coal and gangue will be transported into the collection chamber 9 by the conveyor belt 3, and the collection chamber 9 can be divided into three parts by two baffles 11, which can be respectively placed in the medium coal, clean coal and gangue, and the medium coal, clean coal and gangue are respectively blown to different places by a high-power air gun set in the blowing equipment box 12. Since the quality of the medium coal, clean coal and gangue is different, the blowing force of the air gun may also be different, and the medium coal, clean coal and gangue will accurately fall into the designated place (collection chamber), that is, the collection chamber 9. Through the protection of the first baffle 10, the medium coal, clean coal and gangue will not be blown to places outside the collection chamber 9, protecting the storage safety of the raw coal.

[0077] For details, please refer to Figure 3-Figure 4 A protective ring 16 is fixedly connected to the circumferential surface of the rolling chamber 602 , and the protective ring 16 is arranged on one side end of the gear ring 603 .

[0078] In this embodiment, the protective ring 16 can prevent the gear ring 603 and the gear 606 from being misaligned when they are engaged, thereby protecting the safety of their engagement and making them more stable when used in conjunction with each other.

[0079] For details, please refer to Figure 2 The surface of the conveyor belt 3 is provided with a protective edge strip 4, and the material of the protective edge strip 4 is rubber.

[0080] In this embodiment: the protective edge strips 4 can be used to limit the position of medium coal, clean coal and gangue, so as to prevent the raw coal from shifting to both sides and falling during transportation, and the material of the protective edge strips 4 is rubber, so it can cooperate with the conveyor belt 3 without breaking.

[0081] For details, please refer to Figure 2 The upper end of the support platform 1 is fixedly connected with a triangular plate 2 , and the triangular plate 2 is located at the upper end of the first baffle 10 .

[0082] In this embodiment, the triangular plate 2 can be provided to prevent the medium coal, clean coal and gangue from falling during collection, thereby protecting the safety of the medium coal, clean coal and gangue.

[0083] For details, please refer to Figure 1 Both side ends of the supporting leg 604 are fixedly connected with a protective plate 8, and the material of the protective plate 8 is plastic.

[0084] In this embodiment, the protective plate 8 can be used to protect the internal gear 606 and the gear ring 603 from contacting the outside, so that when people are around, the safety of the people can be protected and no contact will occur between them.

[0085] For details, please refer to Figure 2 One side end of the dustproof cover 7 is fixedly connected with a soft baffle 5, and the material of the soft baffle 5 is rubber.

[0086] In this embodiment: the soft baffle 5 can be set to prevent dust from escaping outward from one side of the dust cover 7, and the dust can be blocked. Since the soft baffle 5 is made of rubber, it will not affect the operation of medium coal, clean coal and gangue, and it is convenient to store dust.

[0087] For details, please refer to Figure 1 The material of the dustproof cover 7 is stainless steel.

[0088] In this embodiment, the dust-proof cover 7 is made of stainless steel. When the device is not in use and the dust-proof cover 7 needs to be cleaned, the dust on the surface of the dust-proof cover 7 can be easily wiped off, which is convenient for cleaning.

[0089] The working principle and use process of the utility model are as follows: the raw coal that needs dry coal selection is poured into the pouring box 601, and the raw coal is allowed to enter the rolling chamber 602 through the inclined plate 605. The motor 608 is started to drive the gear 606 to operate so that it meshes with the gear ring 603. The rolling chamber 602 rotates and the raw coal inside it rolls. The rolling chamber for coal selection utilizes the accelerated rotation or high-speed rotation of the rolling chamber to subject the raw coal to the dual effects of centrifugal force and gravity in the rolling chamber, thereby achieving the screening and grading of lump coal and fine coal. That is, the raw coal is subjected to the effects of centrifugal force and gravity when passing through the rolling chamber 602, and the lump coal and fine coal are screened. A sieve hole is set at the tail of the rolling chamber 602, and the diameter of the sieve hole is 5 mm. A fine coal collection chamber is set below the sieve hole. After the lump coal and the fine coal are initially screened by the rolling chamber 602, the fine coal enters the fine coal collecting chamber through the screen holes at the rear of the rolling chamber 602, and the lump coal falls separately on the upper end of the conveyor belt 3 through the opening of the rolling chamber 602, that is, the lump coal and the fine coal are separated. The sorted lump coal includes the medium coal, clean coal and gangue in the raw coal, and the support platform 1 can be used to limit the conveyor belt 3. When the conveyor belt 3 electrically connected to the external power supply is started by a person to rotate, the medium coal, clean coal and gangue can be driven to move forward, so that the medium coal, clean coal and gangue can be further screened later, the efficiency of dry coal separation can be improved, and the raw coal separation can be quickly realized.

[0090] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic dry coal separation machine for coal mines, characterized in that: It comprises a support platform (1), a conveyor belt (3), a support leg (604), a rolling chamber (602), a material dumping box (601), a gear ring (603), a bottom plate (607), a motor (608), a gear (606), an inclined plate (605) and a discharge mechanism, wherein the conveyor belt (3) is arranged in the support platform (1), and the support leg (604) is arranged at one side end of the support platform (1); the rolling chamber (602) is located at the upper end of the support leg (604), and the rolling chamber (602) is located at the upper end of the conveyor belt (3); the material dumping box (601) is arranged at one side end of the support leg (604), and the support leg (604) is located in the rolling chamber (602); The gear ring (603) is fixedly connected to the circumferential surface of the rolling chamber (602); the bottom plate (607) is fixedly connected to one side end of the supporting leg (604); the motor (608) is fixedly connected to the upper end of the bottom plate (607); the gear (606) is fixedly connected to the output shaft of the motor (608); the gear (606) and the gear ring (603) are meshed with each other; the inclined plate (605) is fixedly connected to the inside of the dumping box (601); the discharge mechanism is arranged at the upper end of the conveyor belt (3) to discharge and filter the dust in the raw coal; A sieve plate with sieve holes is arranged at the rear of the rolling cabin; the X-ray source and the signal receiving device are arranged on both sides of the conveyor belt, and the signal receiving device receives the ray transmission signal emitted by the X-ray source that penetrates the medium coal, clean coal and gangue; corresponding to the signal receiving device, large-power air guns are respectively arranged for spraying the medium coal, clean coal and gangue, and multiple large-power air guns respectively receive the identification signals of the medium coal, clean coal and gangue, and blow the medium coal, clean coal and gangue into different collection cabins in time.

2. The automatic dry coal separation machine for coal mines according to claim 1, characterized in that: The discharge mechanism comprises an ash discharge pipe (1501), an ash protection cover (7), a slot (1502), a filter screen (1503), a handle (1504), a fan (1506), a bolt (1508), a support rod (1507) and two second baffles (1505); the ash protection cover (7) is fixedly connected to the upper end of the support platform (1); the ash discharge pipe (1501) is fixedly connected to the upper end of the ash protection cover (7); and the slot (1502) is opened at the upper end of the ash discharge pipe (1501).

3. The automatic dry coal separation machine for coal mines according to claim 2, characterized in that: The filter (1503) is located in the slot (1502), the handle (1504) is fixedly connected to the upper end of the filter (1503), the two second baffles (1505) are respectively fixedly connected to the two side ends of the ash discharge pipe (1501), the fan (1506) is arranged in the ash discharge pipe (1501), and the support rods (1507) are respectively fixedly connected to one side end of the fan (1506).

4. The automatic dry coal separation machine for coal mines according to claim 3, characterized in that: A threaded hole is provided at one side end of the support rod (1507), the bolt (1508) is arranged in the ash discharge pipe (1501), the bolt (1508) is threadedly connected in the threaded hole, and the rolling chamber (602) is located in the ash protection cover (7).

5. The automatic dry coal separation machine for coal mines according to claim 4, characterized in that: A support plate (13) is fixedly connected between the inner walls on both sides of the support platform (1), a signal receiver (14) is provided at the upper end of the support plate (13), and a blowing device box (12) is provided inside the support platform (1); a collection chamber (9) is fixedly connected to one side end of the support platform (1), a first baffle plate (10) is fixedly connected to the upper end of the collection chamber (9), and two blocking plates (11) are fixedly connected to the upper end of the collection chamber (9).

6. The automatic dry coal separator for coal mine according to claim 5, characterized in that: A protective ring (16) is fixedly connected to the circumferential surface of the rolling chamber (602), and the protective ring (16) is arranged at one side end of the gear ring (603); a protective edge strip (4) is provided on the surface of the conveyor belt (3), and the material of the protective edge strip (4) is rubber.

7. The automatic dry coal separator for coal mines according to claim 6, characterized in that: The upper end of the support platform (1) is fixedly connected to a triangular plate (2), and the triangular plate (2) is located at the upper end of the first baffle (10).

8. The automatic dry coal separator for coal mines according to claim 7, characterized in that: Both side ends of the support leg (604) are fixedly connected to a protective plate (8), the material of the protective plate (8) being plastic; one side end of the dust cover (7) is fixedly connected to a soft baffle (5), the material of the soft baffle (5) being rubber; the material of the dust cover (7) is stainless steel.

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