CN114100743A - Full-automatic circulating grinding and feeding device and control method thereof - Google Patents

Abstract

The invention relates to a full-automatic circulating grinding and feeding device and a control method thereof, the full-automatic circulating grinding and feeding device comprises a feeding device body, the feeding device body comprises a feeding hole (11), a grinding cavity (12) and a discharging cavity (13), materials enter the grinding cavity (12) through the feeding hole (11) to be ground, and ground material particles are output through the discharging cavity (13), and the full-automatic circulating grinding and feeding device is characterized in that: a screen (3) is arranged between the grinding cavity (12) and the discharging cavity (13), crushed small-particle-size material particles pass through the screen (3) and enter the discharging cavity (13) to be transferred, and the crushed large-particle-size material particles are blocked by the screen (3) and sequentially enter the feeding port (11) and the grinding cavity (12) through a material returning and conveying structure to finish secondary grinding. The feed back conveying structure enables unqualified particles to automatically enter the grinding cavity again for grinding, so that the grinding quality of materials is ensured, the energy and labor cost is saved, and the environment-friendly production is realized.

Description

Full-automatic circulating grinding and feeding device and control method thereof

Technical Field

The invention relates to the technical field of feeding devices, in particular to a full-automatic circulating grinding and feeding device and a control method thereof.

Background

The spiral feeding device is a main unit for mechanized transportation work of all departments in the industry and agriculture, can reduce the labor intensity of the transportation work, improves the working efficiency, and has wide application range. The spiral feeding device is suitable for various industries, such as building material, chemical industry, electric power, metallurgy, coal, grain and the like, is suitable for horizontally or obliquely conveying powdery, granular and small blocky materials, such as coal, ash, slag, cement, grain and the like, has the material temperature of less than 200 ℃, and is not suitable for conveying easily-deteriorated, high-viscosity and easily-caked materials.

In the prior art, the applicant's own chinese utility model patent: a rotary vertical quantitative feeding device CN214233572U solves the problem that the bulk material can be processed into powder and is easy to be fed quantitatively. However, it has technical problems that: the crushed materials are uneven and have large particle size difference, and the high quality requirement on the uniformity of the materials cannot be met. In addition, if the particle size of the material needs to be set to the particle size within a specific range, the particles with large particle size need to be manually subjected to secondary crushing, so that extra energy cost, personnel cost and equipment cost are increased, and the environment friendliness, energy conservation and emission reduction are not facilitated.

Disclosure of Invention

The invention designs a full-automatic circulating grinding and feeding device and a control method thereof, which solve the technical problems that: the existing feeding device has uneven material crushing and large particle size difference, and can not meet the high quality requirement on the uniformity of materials. If the secondary processing easily causes the increase of extra energy cost, personnel cost and equipment cost, the secondary processing is not beneficial to environmental protection, energy conservation and emission reduction.

In order to solve the technical problems, the invention adopts the following scheme:

the utility model provides a full automatic cycle grinds feeding device, includes the feeding device body, the feeding device body includes the feed inlet, grinds the chamber and goes out the material chamber, and the material is smashed in getting into the grinding chamber through the feed inlet, and the material granule after smashing passes through ejection of compact chamber output, its characterized in that: a screen is arranged between the grinding cavity and the discharge cavity, crushed small-particle-size material particles pass through the screen and enter the discharge cavity to be transferred, and crushed large-particle-size material particles are blocked by the screen and sequentially enter the feed inlet and the grinding cavity through a feed back conveying structure to finish secondary grinding;

the feed back conveying structure comprises a conveying belt, a plurality of material receiving funnels are arranged on the conveying belt, the material receiving funnels collect large-particle-size material particles intercepted by a screen, a first belt wheel is located at the lowest part, a fourth belt wheel is located above the first belt wheel, a third belt wheel is located above a feed inlet, and the first belt wheel, the fourth belt wheel and the third belt wheel are located inside a closed loop formed by the conveying belt; the second belt wheel is located outside a closed loop formed by the conveying belt, so that the conveying belt changes direction and cannot block the movement of the material receiving funnel, the four belt wheels enable the conveying belt to form a digital 7 shape, the driving device of the material returning conveying structure is a driving motor, and the driving motor drives one of the first belt wheel, the fourth belt wheel or the third belt wheel to rotate so as to drive the conveying belt and the material receiving funnel to transfer circularly.

Preferably, the feed back conveying structure comprises a support, the number of the second belt wheels is two, the two second belt wheels are respectively located at the edges of two sides of the conveying belt, and a gap between the two second belt wheels can enable the receiving hopper to pass through; each second belt wheel is connected with one end of a connecting shaft through a bearing, and the other end of the connecting shaft is fixed on the support.

Preferably, the material receiving funnel turnover mechanism further comprises a material receiving funnel turnover mechanism, the material receiving funnel turnover mechanism comprises a fixed permanent magnet and a movable permanent magnet, the fixed permanent magnet connected with the bracket is positioned above the feeding hole and on the inner side of the conveyor belt, the movable permanent magnet is fixed at a contact part of the material receiving funnel and the conveyor belt, one end of the contact part is hinged with the conveyor belt through a fifth rotating shaft, and the other end of the contact part is connected with the conveyor belt through a second spring; when the material receiving funnel moves to the position below the fixed permanent magnet, the fixed permanent magnet and the movable permanent magnet repel each other, so that the material receiving funnel is pushed to turn around the fifth rotating shaft, the material in the material receiving funnel can fall out to the maximum extent, and the second spring is stretched; when the material receiving funnel is moved away from the fixed permanent magnet, the fixed permanent magnet and the movable permanent magnet are not mutually induced any more, and the material receiving funnel is restored to the original state under the contraction action of the second spring.

Preferably, the discharge cavity is provided with fan blades, and the rotating fan blades convey small-particle-size material particles into the designated receiving device through a pipeline; the fan blades are distributed on the fourth rotating shaft, and one end of the fourth rotating shaft is connected with the output end of the second motor.

Preferably, the other end of the fourth rotating shaft is fixedly connected with a driving wheel, the driving wheel is connected with a driven wheel through a synchronous belt, one end of a transmission shaft is fixedly connected with the driven wheel, the other end of the transmission shaft is fixedly connected with a first belt wheel, and the second motor can enable the fan blades and the feed back conveying structure to work synchronously.

Preferably, a first nip roll and a second pressure roll are arranged in the grinding cavity, the material is rolled and passed through the space between the first nip roll and the second pressure roll, a first rotating shaft penetrates through the first nip roll, one end of the first rotating shaft is connected with the output end of a first motor, and the other end of the first rotating shaft is connected with a first gear; a second rotating shaft penetrates through the second pressure roller, one end of the second rotating shaft is connected with the grinding cavity through a bearing, and the other end of the second rotating shaft is connected with a second gear; the first gear is meshed with the second gear; when the first motor works, the first pressure roll and the second pressure roll rotate reversely, and the materials are ground and crushed.

Preferably, the screen is obliquely arranged, and the obliquely arranged screen can roll the large-particle-size material particles from a high position to a low position; the grinding cavity is provided with a discharge hole, a screen is arranged at the inlet of the discharge hole, a discharge pipe is arranged at the outlet of the discharge hole, and large-particle-size material particles output by the discharge pipe can enter the material receiving hopper.

Preferably, the low end of the screen is hinged with the inner wall of the outlet of the grinding cavity through a third rotating shaft, the high end of the screen is connected with a step in the grinding cavity through a first spring, and the outer wall of the first pressure roller is provided with a triggering bulge; when the trigger bulge rotates to press the screen, the first spring is contracted; when the trigger bulge leaves the screen, the first spring is released, and the screen is driven to shake, so that the material particles are prevented from blocking the screen.

Preferably, the second pressure roller is provided with a ring groove, when the trigger protrusion moves to a side close to the second pressure roller, the trigger protrusion can hide the ring groove, and when the trigger protrusion moves to a side far away from the second pressure roller, the trigger protrusion can press the screen.

A control method of a full-automatic circulating grinding and feeding device comprises the following steps:

step 1, feeding materials into a grinding cavity through a feeding hole for grinding, allowing the ground small-particle-size material particles to pass through a screen to enter a discharging cavity for transferring, allowing the ground large-particle-size material particles to be blocked by the screen and sequentially enter the feeding hole and the grinding cavity through a material returning and conveying structure to finish grinding again together with newly added materials, and enabling fan blades in the obtained material cavity and the material returning and conveying structure to synchronously work by a second motor;

and 2, finishing the process until all the materials are ground into small-particle-size material particles.

Compared with the feeding device in the prior art, the full-automatic circulating grinding feeding device and the control method thereof have the following beneficial effects:

(1) the feed back conveying structure enables unqualified particles to automatically enter the grinding cavity again for grinding, so that the grinding quality of materials is ensured, the energy and labor cost is saved, and the environment-friendly production is realized.

(2) The feed back conveying structure realizes the overturning of the hopper in a magnet repelling mode, so that the materials in the hopper can fall out to the maximum extent, and the utilization rate of the materials is improved.

(3) According to the invention, the screen is continuously and discontinuously acted by the trigger bulge on the first material pressing roller, and the screen can be regularly shaken under the action of the spring, so that material particles are prevented from blocking the screen.

(4) The fan blades in the discharging cavity and the feed back conveying structure share one driving mechanism for driving, so that the number of used motors is saved.

(5) The second pressure roller is provided with the annular groove, and the trigger bulge can be hidden in the annular groove, so that the trigger bulge is prevented from influencing normal grinding.

Drawings

FIG. 1: the invention discloses a part position schematic diagram of a full-automatic circulating grinding and feeding device;

FIG. 2: the screen mesh of the full-automatic circulating grinding and feeding device is enlarged schematically;

FIG. 3: the invention relates to a schematic diagram of internal components of a grinding cavity of a full-automatic circulating grinding and feeding device;

FIG. 4: the invention discloses a front schematic view of a feed back conveying structure of a full-automatic circulating grinding and feeding device;

FIG. 5: the invention relates to a connection schematic diagram of a discharge chamber part of a full-automatic circulating grinding and feeding device;

FIG. 6: the invention discloses a schematic overturning diagram of a material receiving funnel of a full-automatic circulating grinding and feeding device.

Description of reference numerals:

11-a feed inlet; 12-a grinding chamber; 13-a discharge chamber; 14-a discharge pipe; 20 — a first motor; 21-a first nip roll; 22 — a first shaft; 23-trigger protrusion; 24-a second pressure roller; 25-a second shaft; 26-ring groove; 27 — a first gear; 28 — a second gear; 3, screening a screen; 31 — a first spring; 32-a third shaft; 4-fan blades; 41-a second motor; 42-a fourth shaft; 43-driving wheel; 44-synchronous belt; 50-a transmission shaft; 51, a conveyor belt; 52-a receiving hopper; 53 — first pulley; 54 — a second pulley; 55-third pulley; 56-fourth pulley; 57-a support; 58-connecting shaft; 59-driven wheel; 61-fixing a permanent magnet; 62-moving the permanent magnet; 63-a second spring; 64-fifth axis of rotation.

Detailed Description

The invention is further described below with reference to fig. 1 to 6:

as shown in fig. 1, a full-automatic circulating grinding and feeding device comprises a feeding device body, wherein the feeding device body comprises a feeding hole 11, a grinding cavity 12 and a discharging cavity 13, a material enters the grinding cavity 12 through the feeding hole 11 to be ground, the ground material particles are output through the discharging cavity 13, a screen 3 is arranged between the grinding cavity 12 and the discharging cavity 13, the ground small-particle-size material particles pass through the screen 3 to enter the discharging cavity 13 for transfer, the ground large-particle-size material particles are blocked by the screen 3 and sequentially enter the feeding hole 11 and the grinding cavity 12 through a material returning and conveying structure to finish re-grinding;

the material returning and conveying structure comprises a conveying belt 51, a plurality of material receiving hoppers 52 are arranged on the conveying belt 51, the material receiving hoppers 52 collect large-particle-size material particles intercepted by the screen 3, a first belt wheel 53 is positioned at the lowest part, a fourth belt wheel 56 is positioned above the first belt wheel 53, a third belt wheel 55 is positioned above the feeding hole 11, and the first belt wheel 53, the fourth belt wheel 56 and the third belt wheel 55 are positioned inside a closed loop formed by the conveying belt 51; the second belt wheel 54 is positioned outside the closed loop formed by the conveying belt 51, so that the conveying belt 51 changes the direction and does not block the movement of the material receiving hopper 52, the conveying belt 51 is formed into a shape of a figure 7 by the four belt wheels, the driving device of the material returning conveying structure is a driving motor, and the driving motor drives one of the first belt wheel 53, the fourth belt wheel 56 or the third belt wheel 55 to rotate so as to drive the conveying belt 51 and the material receiving hopper 52 to circularly transfer.

As shown in fig. 2, the screen 3 is arranged obliquely, and the obliquely arranged screen 3 can roll large-particle-size material particles from a high position to a low position; the grinding cavity 12 is provided with a discharge hole, the inlet of the discharge hole is a screen 3, the outlet of the discharge hole is provided with a discharge pipe 14, and large-particle-size material particles output by the discharge pipe 14 can enter the material receiving hopper 52.

The low-position end of the screen 3 is hinged with the inner wall of the outlet of the grinding cavity 12 through a third rotating shaft 32, the high-position end of the screen 3 is connected with a step in the grinding cavity 12 through a first spring 31, and the outer wall of the first material pressing roller 21 is provided with a trigger bulge 23; when the trigger protrusion 23 rotates to press the screen 3, the first spring 31 is contracted; when the trigger protrusion 23 leaves the sieve screen 3, the first spring 31 is released and the sieve screen 3 is driven to shake so as to prevent the material particles from blocking the sieve screen 3.

As shown in fig. 3, a first nip roll 21 and a second pressure roll 24 are arranged in the grinding chamber 12, the material passes through between the first nip roll 21 and the second pressure roll 24, a first rotating shaft 22 penetrates through the first nip roll 21, one end of the first rotating shaft 22 is connected with the output end of the first motor 20, and the other end is connected with a first gear 27; a second rotating shaft 25 penetrates through the second pressure roller 24, one end of the second rotating shaft 25 is connected with the grinding cavity 12 through a bearing, and the other end of the second rotating shaft is connected with a second gear 28; the first gear 27 and the second gear 28 are meshed with each other; the first motor 20 is operated to rotate the first nip roll 21 and the second pressure roll 24 in opposite directions and grind and crush the materials.

The second pressure roller 24 is provided with an annular groove 26, when the trigger protrusion 23 moves to a side close to the second pressure roller 24, the trigger protrusion 23 can be hidden in the annular groove 26, and when the trigger protrusion 23 moves to a side far from the second pressure roller 24, the trigger protrusion 23 can press the screen cloth 3.

As shown in fig. 4, the feed back conveying structure includes a bracket 57, two second belt wheels 54 are respectively located at two side edges of the conveying belt 51, and a gap between the two second belt wheels 54 enables the receiving hopper 52 to pass through; each second pulley 54 is connected to one end of a connecting shaft 58 through a bearing, and the other end of the connecting shaft 58 is fixed to the bracket 57.

As shown in fig. 5, the discharge chamber 13 is provided with fan blades 4, and the rotating fan blades 4 convey the small-particle-size material particles to a designated receiving device through a pipeline; the fan blades 4 are distributed on the fourth rotating shaft 42, and one end of the fourth rotating shaft 42 is connected with the output end of the second motor 41.

The other end of the fourth rotating shaft 42 is fixedly connected with a driving wheel 43, the driving wheel 43 is connected with a driven wheel 59 through a synchronous belt 44, one end of a transmission shaft 50 is fixedly connected with the driven wheel 59, the other end of the transmission shaft 50 is fixedly connected with a first belt pulley 53, and the second motor 41 can enable the fan blades 4 and the feed back conveying structure to work synchronously.

As shown in fig. 6, the material receiving funnel turning mechanism is further included, the material receiving funnel turning mechanism includes a fixed permanent magnet 61 and a movable permanent magnet 62, the fixed permanent magnet 61 connected with the bracket 57 is located above the material inlet 11 and on the inner side of the conveyor belt 51, the movable permanent magnet 62 is fixed at a contact portion of the material receiving funnel 52 and the conveyor belt 51, one end of the contact portion is hinged to the conveyor belt 51 through a fifth rotating shaft 64, and the other end of the contact portion is connected with the conveyor belt 51 through a second spring 63; when the receiving hopper 52 moves below the fixed permanent magnet 61, the fixed permanent magnet 61 and the movable permanent magnet 62 repel each other, so that the receiving hopper 52 is pushed to turn around the fifth rotating shaft 64, the materials in the receiving hopper fall out to the maximum extent, and the second spring 63 is stretched; when the receiving hopper 52 moves away from the fixed permanent magnet 61, the fixed permanent magnet 61 and the movable permanent magnet 62 are no longer mutually induced, and the receiving hopper 52 is restored to the original state under the contraction action of the second spring 63.

The control principle of the full-automatic circulating grinding and feeding device is as follows:

step 1, feeding materials into a grinding cavity 12 through a feeding hole 11 for grinding, feeding the ground small-particle-size material particles into a discharging cavity 13 through a screen 3 for transferring, blocking the ground large-particle-size material particles by the screen 3, sequentially feeding the ground large-particle-size material particles into the feeding hole 11 and the grinding cavity 12 through a material returning and conveying structure, and finishing grinding again together with newly added materials, wherein a second motor 41 can enable fan blades 4 in the obtained material cavity 13 and the material returning and conveying structure to work synchronously;

and 2, finishing the process until all the materials are ground into small-particle-size material particles.

The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims (10)

1. The utility model provides a full-automatic circulation grinds feeding device, includes the feeding device body, the feeding device body includes feed inlet (11), grinds chamber (12) and goes out material chamber (13), and the material is smashed in getting into grinding chamber (12) through feed inlet (11), and the material granule after smashing is through going out material chamber (13) output, its characterized in that: a screen (3) is arranged between the grinding cavity (12) and the discharge cavity (13), crushed small-particle-size material particles pass through the screen (3) and enter the discharge cavity (13) for transfer, and crushed large-particle-size material particles are blocked by the screen (3) and sequentially enter the feed inlet (11) and the grinding cavity (12) through a feed back conveying structure to finish re-grinding;

the feed back conveying structure comprises a conveying belt (51), a plurality of material receiving hoppers (52) are arranged on the conveying belt (51), the material receiving hoppers (52) collect large-particle-size material particles intercepted by the screen (3), a first belt wheel (53) is positioned at the lowest part, a fourth belt wheel (56) is positioned above the first belt wheel (53), a third belt wheel (55) is positioned above the feeding hole (11), and the first belt wheel (53), the fourth belt wheel (56) and the third belt wheel (55) are positioned inside a closed loop formed by the conveying belt (51); the second belt wheel (54) is positioned outside a closed loop formed by the conveying belt (51), so that the conveying belt (51) changes the direction and cannot block the movement of the material receiving hopper (52), the four belt wheels enable the conveying belt (51) to form a digital 7 shape, the driving device of the material returning and conveying structure is a driving motor, and the driving motor drives one of the first belt wheel (53), the fourth belt wheel (56) or the third belt wheel (55) to rotate so as to drive the conveying belt (51) and the material receiving hopper (52) to circularly transfer.

2. The full-automatic circulation grinding and feeding device of claim 1, characterized in that: the feed back conveying structure comprises a support (57), two second belt wheels (54) are respectively positioned at the edges of two sides of the conveying belt (51), and a gap between the two second belt wheels (54) can enable the material receiving hopper (52) to pass through; each second belt wheel (54) is connected with one end of a connecting shaft (58) through a bearing, and the other end of the connecting shaft (58) is fixed on the bracket (57).

3. The full-automatic circulation grinding and feeding device of claim 2, characterized in that: the material receiving funnel turnover mechanism comprises a fixed permanent magnet (61) and a movable permanent magnet (62), the fixed permanent magnet (61) connected with a support (57) is positioned above the feeding hole (11) and on the inner side of the conveyor belt (51), the movable permanent magnet (62) is fixed at a contact part of the material receiving funnel (52) and the conveyor belt (51), one end of the contact part is hinged with the conveyor belt (51) through a fifth rotating shaft (64), and the other end of the contact part is connected with the conveyor belt (51) through a second spring (63); when the material receiving funnel (52) moves below the fixed permanent magnet (61), the fixed permanent magnet (61) and the movable permanent magnet (62) repel each other, so that the material receiving funnel (52) is pushed to turn around the fifth rotating shaft (64) to enable the material in the material receiving funnel to fall out to the maximum extent, and the second spring (63) is stretched; when the material receiving funnel (52) is moved away from the fixed permanent magnet (61), the fixed permanent magnet (61) and the movable permanent magnet (62) are not mutually induced any more, and the material receiving funnel (52) is restored to the original state under the contraction action of the second spring (63).

4. The full-automatic circulation grinding and feeding device of claim 3, characterized in that: the discharging cavity (13) is internally provided with fan blades (4), and the rotating fan blades (4) convey small-particle-size material particles into a specified receiving device through a pipeline; the fan blades (4) are distributed on the fourth rotating shaft (42), and one end of the fourth rotating shaft (42) is connected with the output end of the second motor (41).

5. The full-automatic circulation grinding and feeding device of claim 4, characterized in that: the other end of the fourth rotating shaft (42) is fixedly connected with a driving wheel (43), the driving wheel (43) is connected with a driven wheel (59) through a synchronous belt (44), one end of a transmission shaft (50) is fixedly connected with the driven wheel (59), the other end of the transmission shaft (50) is fixedly connected with a first belt wheel (53), and a second motor (41) can enable the fan blades (4) and a material returning and conveying structure to work synchronously.

6. The full-automatic circulation grinding and feeding device of claim 5, characterized in that: a first nip roll (21) and a second pressure roll (24) are arranged in the grinding cavity (12), materials are rolled and pass through between the first nip roll (21) and the second pressure roll (24), a first rotating shaft (22) penetrates through the first nip roll (21), one end of the first rotating shaft (22) is connected with the output end of a first motor (20), and the other end of the first rotating shaft is connected with a first gear (27); a second rotating shaft (25) penetrates through the second pressure roller (24), one end of the second rotating shaft (25) is connected with the grinding cavity (12) through a bearing, and the other end of the second rotating shaft is connected with a second gear (28); the first gear (27) and the second gear (28) are meshed with each other; the first motor (20) is operated to rotate the first nip roll (21) and the second pressure roll (24) in opposite directions and grind and crush the material.

7. The full-automatic circulation grinding and feeding device of claim 6, characterized in that: the screen (3) is obliquely arranged, and the obliquely arranged screen (3) can enable large-particle-size material particles to roll from a high position to a low position; the grinding cavity (12) is provided with a discharge hole, the inlet of the discharge hole is a screen (3), the outlet of the discharge hole is provided with a discharge pipe (14), and large-particle-size material particles output by the discharge pipe (14) can enter the material receiving funnel (52).

8. The full-automatic circulation grinding and feeding device of claim 7, characterized in that: the low-position end of the screen (3) is hinged with the inner wall of the outlet of the grinding cavity (12) through a third rotating shaft (32), the high-position end of the screen (3) is connected with a step in the grinding cavity (12) through a first spring (31), and the outer wall of the first pressure roller (21) is provided with a trigger bulge (23); when the trigger bulge (23) rotates to press the screen (3), the first spring (31) contracts; when the trigger bulge (23) leaves the screen (3), the first spring (31) is released and drives the screen (3) to shake so as to avoid the material particles from blocking the screen (3).

9. The full-automatic circulation grinding and feeding device of claim 8, characterized in that: the second pressure roller (24) is provided with an annular groove (26), when the trigger protrusion (23) moves to one side close to the second pressure roller (24), the trigger protrusion (23) can be hidden in the annular groove (26), and when the trigger protrusion (23) moves to one side far away from the second pressure roller (24), the trigger protrusion (23) can press the screen (3).

10. A method for controlling the full-automatic cyclic grinding and feeding device of claim 9, comprising the following steps:

step 1, materials enter a grinding cavity (12) through a feeding hole (11) to be ground, ground small-particle-size material particles pass through a screen (3) and enter a discharging cavity (13) to be transferred, ground large-particle-size material particles are blocked by the screen (3) and sequentially enter the feeding hole (11) and the grinding cavity (12) through a material returning conveying structure to finish grinding again together with newly added materials, and a second motor (41) can enable fan blades (4) in the obtained material cavity (13) and the material returning conveying structure to work synchronously;

and 2, finishing the process until all the materials are ground into small-particle-size material particles.

Images