CN221108879U - Straw sieving mechanism - Google Patents

Abstract

The utility model provides a straw screening device, which relates to the technical field of agricultural equipment and comprises: a trommel assembly comprising a trommel body and a first drive assembly for driving the rotation of the trommel body; the rotary screen body is provided with a first feed inlet and a first discharge outlet; the rotary screen body is provided with a first screen hole for discharging sand; a vibrating screen assembly comprising a vibrating screen body and a second driving assembly for driving the vibrating screen body to vibrate; the vibrating screen body is positioned below the first discharging hole and is used for collecting straws; the vibrating screen body is provided with a second discharge hole and a second screen hole for discharging sand; the air suction assembly is provided with a second feeding hole and a third discharging hole, and the second feeding hole is positioned above the vibrating screen and is close to the second discharging hole; the air suction assembly is used for driving air flow to flow from the second feeding port to the third discharging port.

Description

Straw sieving mechanism

Technical Field

The utility model relates to the technical field of agricultural equipment, in particular to a straw screening device.

Background

Straw is an important raw material of feed, but a large amount of sand is carried after the straw is collected, and the sand needs to be removed before the straw is used as feed. In the prior art, a rotary screen is generally adopted to remove sand on the straw, namely, a large amount of straw carrying the sand is put into the rotary screen, and the rotary screen rotates to drive the straw to roll in the drum, so that the sand falls off from the straw and falls out from the filter holes of the drum. However, as the quantity of the straw put into the rotary screen is large, the effect of the rotary screen on removing sand from the straw is limited, so that the sand on the straw can not be completely removed.

Therefore, there is a need to provide a straw screening device that can effectively remove sand on a large amount of straw.

Disclosure of utility model

The utility model aims to provide a straw screening device to solve the technical problem that a large amount of straws used as feed in the prior art cannot be used for quickly and effectively removing sand.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a straw screening device, which comprises: a trommel assembly comprising a trommel body and a first drive assembly for driving the rotation of the trommel body; the rotary screen body is provided with a first feed inlet and a first discharge outlet; the rotary screen body is provided with a first screen hole for discharging sand; a vibrating screen assembly comprising a vibrating screen body and a second driving assembly for driving the vibrating screen body to vibrate; the vibrating screen body is positioned below the first discharging hole and is used for collecting straws; the vibrating screen body is provided with a second discharge hole and a second screen hole for discharging sand; the air suction assembly is provided with a second feeding hole and a third discharging hole, and the second feeding hole is positioned above the vibrating screen and is close to the second discharging hole; the air suction assembly is used for driving air flow to flow from the second feeding port to the third discharging port.

Preferably, the above further comprises a transfer assembly for transferring sand discharged by the trommel assembly and the vibrating screen assembly; the conveying assembly comprises a conveying belt and a third driving assembly for driving the conveying belt to rotate; the conveyer belt is located drum screen body and shale shaker body below.

Preferably, the above further comprises a bracket; the rotary screen component, the vibrating screen component and the induced draft component are all arranged on the bracket.

Preferably, the first driving assembly includes a first motor; the rotary screen body is rotationally connected with the bracket; the drum screen body is provided with an annular transmission rail; the output end of the first motor is provided with a driving wheel in transmission connection with the transmission rail.

Preferably, the trommel assembly comprises a housing; the outer cover is sleeved on the outer side of the rotary screen body; and a leak hole for sand to pass through is arranged below the outer cover.

Preferably, the vibrating screen further comprises a baffle for preventing straw on the vibrating screen body from falling off; the baffle is arranged on the bracket and is positioned between the rotary screen component and the air suction component.

Preferably, the second driving assembly comprises a second motor, a crank-link mechanism and two pairs of swing rods; the two pairs of swing rods are respectively positioned at two sides of the vibrating screen body, one end of each swing rod is rotationally connected with the vibrating screen body, and the other end of each swing rod is rotationally connected with the bracket; the input end of the crank connecting rod mechanism is in transmission connection with the output end of the second motor, and the output end of the crank connecting rod mechanism is in rotary connection with the vibrating screen body.

Preferably, the air suction assembly comprises an air inlet shell, a volute, an impeller and a fourth driving assembly; the air inlet shell is communicated with the volute; the air inlet shell is provided with a second feeding hole; the volute is provided with a third discharge hole; the impeller is positioned in the volute and is in transmission connection with the fourth driving assembly.

Preferably, the trommel body is obliquely arranged, and the first feed inlet is higher than the first discharge outlet.

Preferably, the inner side wall of the rotary screen body is provided with a plurality of bulges for carrying straws to rotate along with the rotary screen body.

Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:

The rotary screen assembly is used for stripping sand on the straw in the first step, a large amount of straw enters the rotary screen body from the first feed inlet, the straw in the rotary screen body is axially extruded out of the first discharge outlet by the newly input straw, the rotary screen body is driven to rotate by the first driving assembly, and the straw is stirred in the rotary screen body so that the sand on the straw falls off and falls off from the first sieve holes. Straw falls onto the shale shaker body after being discharged from first discharge gate, and the shale shaker subassembly is used for the sand on the straw of second step stripping. The second drive assembly drives the vibrating screen body to vibrate, sand on the straw is vibrated and falls from the second sieve mesh at the moment, the straw moves to the second discharge gate under vibration, the straw with lighter weight flows to the third discharge gate along with the air current from the second feed inlet under the effect of the air suction assembly at the moment, the straw discharged from the third discharge gate is cleaner, and the sand is cleaned. Straw materials which are not sucked by the air suction assembly or fall off from the second sieve holes are discharged from the second discharge hole. In conclusion, the utility model can rapidly and effectively remove a large amount of sand on the straw.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a straw screening device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the housing according to the embodiment of the present utility model;

FIG. 3 is a schematic view of a first driving assembly according to an embodiment of the present utility model;

FIG. 4 is a top view of a first drive assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic view of another configuration of a first driving assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the structure of a shaker assembly of an embodiment of the present utility model;

Fig. 7 is a schematic structural view of a trommel body according to an embodiment of the present utility model.

Icon: 1. a trommel assembly; 11. a trommel body; 1101. a first feed port; 1102. a first discharge port; 1103. a first screen aperture; 112. a transmission rail; 113. a protrusion; 12. a first drive assembly; 121. a first motor; 122. a first drive shaft; 123. a second drive shaft; 124. a driving wheel; 125. driven wheel; 126. a support table; 127. a slide roller; 128. a transfer member; 129. a first driving wheel; 1210. a second driving wheel; 13. an outer cover; 1301. a leak hole; 131. a guide plate; 2. a vibrating screen assembly; 21. a vibrating screen body; 2101. a second discharge port; 2102. a second screen aperture; 22. a second drive assembly; 221. a second motor; 222. a crank-link mechanism; 2221. a first link; 2222. a second link; 223. swing rod; 3. an air suction assembly; 301. a second feed inlet; 302. a third discharge port; 31. an air inlet shell; 32. a volute; 33. a fourth drive assembly; 4. a transfer assembly; 41. a conveyor belt; 42. a third drive assembly; 421. a third motor; 43. a support frame; 44. a drive roll; 45. a driving roller; 5. a bracket; 6. and a baffle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

The utility model provides a straw screening device, referring to fig. 1, comprising: a trommel assembly 1 comprising a trommel body 11 and a first drive assembly 12 for driving the rotation of the trommel body 11; the trommel body 11 has a first feed inlet 1101 and a first discharge outlet 1102; the trommel body 11 is provided with a first mesh 1103 for discharging sand; a vibrating screen assembly 2 including a vibrating screen body 21 and a second driving assembly 22 for driving the vibrating screen body 21 to vibrate; the vibrating screen body 21 is positioned below the first discharging hole 1102 and is used for collecting straws; the vibrating screen body 21 is provided with a second discharge port 2101 and a second screen hole 2102 for discharging sand; an air suction assembly 3 having a second feed port 301 and a third discharge port 302, the second feed port 301 being located above the shaker and proximate to the second discharge port 2101; the air suction assembly 3 is used for driving air flow to flow from the second feeding hole 301 to the third discharging hole 302.

In some embodiments, referring to fig. 1, the trommel assembly 1 is used for stripping sand on straw in a first step, a large amount of straw enters the trommel body 11 from the first feed inlet 1101, the newly input straw axially extrudes the straw in the trommel body 11 out of the first discharge outlet 1102, the first driving assembly 12 drives the trommel body 11 to rotate, and the straw is stirred in the trommel body 11 so that the sand on the straw falls off and falls off from the first sieve holes 1103. Straw falls onto the vibrating screen body 21 after being discharged from the first discharging hole 1102, and the vibrating screen assembly 2 is used for stripping sand and soil on the straw in the second step. The second driving component 22 drives the vibrating screen body 21 to vibrate, sand on the straws is vibrated and falls off from the second sieve holes 2102, the straws move downwards to the second discharge holes 2101 under the vibration, at the moment, the straws with lighter weight flow along with the air flow from the second feed inlet 301 to the third discharge hole 302 under the action of the air suction component 3, the straws discharged from the third discharge hole 302 are cleaner, and the sand is cleaned. Straw material that is not sucked by the suction assembly 3 or falls off the second mesh 2102 is discharged from the second discharge port 2101.

The length of the straw put into the rotary screen body 11 is 3-10 cm. In some embodiments, the apertures of the first and second screen holes 1103 and 2102 may be 3-5 mm, and the specific apertures may be set as required, so that the apertures of the first and second screen holes 1103 and 2102 are smaller than the diameter of the straw seeds, and the sand or impurities with larger size and the straw seeds are finally discharged from the second discharge hole 2101, because the sand or impurities with larger size are heavier and are not sucked by the suction assembly 3, and the straw seeds with smaller volume are not easily sucked by the suction assembly 3.

In some embodiments, referring to fig. 1, trommel body 11 is disposed obliquely and first feed port 1101 is higher than first discharge port 1102. A large amount of straws slide axially along the rotary screen body 11 under the action of gravity and move from the first feed inlet 1101 to the first discharge outlet 1102, so that the straws are prevented from being accumulated and blocked in the rotary screen body 11.

In some embodiments, the inclination angle of the trommel body 11 is not limited, a pushing device for pushing straw, such as a cylinder push rod, may be disposed in the trommel body 11, an installation frame may be disposed outside the straw screening device, one end of the cylinder push rod is fixed on the installation frame, and the other end of the cylinder push rod extends into the inner side of the trommel body 11 to push straw to be discharged from the first discharge port 1102.

In some embodiments, referring to fig. 1, further comprising a transfer assembly 4 for transferring sand discharged by the trommel assembly 1 and the shaker assembly 2; the conveying assembly 4 includes a conveying belt 41 and a third driving assembly 42 for driving the conveying belt 41 to rotate; the conveyor belt 41 is located below the trommel body 11 and the vibrating screen body 21.

In detail, referring to fig. 1, the transfer assembly 4 may further include a supporting frame 43, a driving roller 44, and a driving roller 45. The driving roller 44 and the driving roller 45 are both in rotary connection with the supporting frame 43, the conveying belt 41 is sleeved on the driving roller 44 and the driving roller 45, the third driving assembly 42 comprises a third motor 421, the output end of the third motor 421 is in transmission connection with the driving roller 44, and the driving roller 44 drives the conveying belt 41 to rotate. The direction of movement of the conveyor belt 41 is not limited, for example, the conveyor belt 41 may be moved from the shaker assembly 2 to the shaker assembly 1, and the conveyor belt 41 may be moved from the shaker assembly 1 to the shaker assembly 2. The conveyor belt 41 is located below the trommel body 11 and the vibrating screen body 21, and the first screen aperture 1103 and the second screen aperture 2102 are located directly above the conveyor belt 41. The conveyor belt 41 transfers the sand falling off from the straw to the outside of the straw screening device. In some embodiments, the support 43 is a bracket 5.

In some embodiments, referring to fig. 1, the trommel body 11, conveyor belt 41, and shaker body 21 may all be arranged obliquely in the same direction so that the straw is convenient to move by gravity on the shaker body 21 within the trommel body 11. The conveyor belt 41 may be moved from the vibrating screen body 21 toward the trommel body 11, in which case the direction of movement of the conveyor belt 41 is from low to high. The surface of the conveyor belt 41 may be provided with a partition for preventing sand from rolling, and preventing sand from rolling off the conveyor belt 41. One end of the conveyor belt 41, which is close to the first feeding port 1101, is a discharging end, the discharging end extends beyond the shaft end of the rotary screen body 11, and a sand bin for collecting sand can be arranged below the discharging end.

In some embodiments, referring to fig. 1, trommel assembly 1 includes a housing 13; the outer cover 13 is sleeved outside the rotary screen body 11; a weep hole 1301 for the passage of sand is provided below the housing 13.

In detail, the drum screen body 11 drives a large amount of dust generated in the process of straw rotation, in order to avoid dust flying to influence the surrounding environment of the straw screening device and the work of workers, the drum screen body 11 is provided with the outer cover 13, the outer cover 13 can prevent dust flying, and the outer cover 13 can be fixed on the bracket 5. The shape of the leakage hole 1301 below the cover 13 may be rectangular, the length direction of the leakage hole 1301 is parallel to the axis direction of the trommel body 11, and the leakage hole 1301 is used for leaking sand.

In some embodiments, referring to fig. 2, the housing 13 is provided with a guide plate 131 at the edge of the drain hole 1301, the guide plate 131 being used to guide sand and prevent the sand from falling outside the conveyor belt 41. The number of the guide plates 131 may be two, the upper end of each guide plate 131 is connected with the housing 13, the lower end of each guide plate 131 is a free end and is located above the conveyor belt 41, and the distance between the lower ends of the two guide plates 131 is smaller than the width of the conveyor belt 41.

In some embodiments, further comprising a bracket 5; the rotary screen assembly 1, the vibrating screen assembly 2 and the induced draft assembly 3 are all arranged on a bracket 5.

In some embodiments, referring to fig. 1, 3, and 4, the first drive assembly 12 includes a first motor 121; the rotary screen body 11 is rotationally connected with the bracket 5; the rotary screen body 11 is provided with an annular transmission rail 112; the output end of the first motor 121 is provided with a driving wheel 124 in driving connection with the driving rail 112. The support 5 may be provided with two support tables 126, each support table 126 is used for supporting two shaft ends of the trommel body 11, each support table 126 may be rotatably connected with a plurality of slide rollers 127, the plurality of slide rollers 127 are arranged in an arc, and an axis of each slide roller 127 is parallel to an axis of the trommel body 11. The roller 127 abuts against the outer side wall of the trommel body 11, and the roller 127 rotates together with the frame 5 while the trommel body 11 rotates with respect to the frame 5. The first motor 121 may be fixed to the stand 5, and a rotation shaft of the first motor 121 is parallel to an axis of the trommel body 11. The first motor 121 drives the driving wheel 124 to rotate, and the driving wheel 124 drives the rotary screen body 11 to rotate. In some embodiments, the first driving assembly 12 may include a first transmission shaft 122, the first transmission shaft 122 is connected to a rotation shaft of the first motor 121, and two driving wheels 124 may be disposed on the first transmission shaft 122. Two transmission rails 112 can be arranged on the rotary screen body 11, each transmission rail 112 is close to one shaft end of the rotary screen body 11, each driving wheel 124 is matched with one transmission rail 112, and the two driving wheels 124 enable the rotary screen body 11 to rotate stably. In some embodiments, the first transmission shaft 122 may be located outside the housing 13, and two shaft ends of the trommel body 11 respectively protrude from shaft ends of the housing 13.

In some embodiments, the drive wheel 124 and the outer side wall of the trommel body 11 may each be provided with teeth, the drive wheel 124 being connected to the trommel body 11 in a similar gear connection. In other embodiments, the driving wheel 124 and the outer side wall of the trommel body 11 may be provided with a friction layer, which may be made of a material having a high friction coefficient, such as a rubber layer, and the friction force between the driving wheel 124 and the trommel body 11 is used to rotate the trommel body 11 relative to the support 5.

In some embodiments, referring to fig. 5, support table 126 and slide roller 127 may be removed from bracket 5. The first drive assembly 12 may include a first drive shaft 122, a second drive shaft 123, and a transfer member 128; the first transmission shaft 122 is connected with the rotating shaft of the first motor 121, two driving wheels 124 can be arranged on the first transmission shaft 122, two driven wheels 125 can be arranged on the second transmission shaft 123, and the first transmission shaft 122 and the second transmission shaft 123 are both in rotary connection with the bracket 5. The rotary screen body 11 is erected on a driving wheel 124 and a driven wheel 125, and the driving wheel 124 and the driven wheel 125 are used for supporting the rotary screen body 11 and driving the rotary screen body 11 to rotate. Two transmission rails 112 can be arranged on the outer side of the rotary screen body 11, and a driving wheel 124 and a driven wheel 125 are matched with the transmission rails 112. The driving wheel 124 near the first motor 121 is axially connected with a first driving wheel 129, the driven wheel 125 near the first motor 121 is axially connected with a second driving wheel 1210, and the first driving wheel 129 and the second driving wheel 1210 are both in transmission connection with the conveying member 128. In some embodiments, both the first drive wheel 129 and the second drive wheel 1210 may be pulleys and the transfer member 128 may be a belt. In other embodiments, both the first drive wheel 129 and the second drive wheel 1210 may be gears and the transfer member 128 may be a chain.

In some embodiments, referring to fig. 1, further comprising a baffle 6 for preventing straw on the vibrating screen body 21 from falling off; the baffle 6 is arranged on the bracket 5 and is positioned between the rotary screen assembly 1 and the air suction assembly 3. The baffle 6 can be located the outside of drum screen body 11, and baffle 6 can be the arc, avoids baffle 6 and drum screen main part to interfere.

In some embodiments, referring to fig. 6, the second drive assembly 22 includes a second motor 221, a crank linkage 222, and two pairs of swing links 223; two pairs of swing rods 223 are respectively positioned at two sides of the vibrating screen body 21, one end of each swing rod 223 is rotationally connected with the vibrating screen body 21, and the other end of each swing rod 223 is rotationally connected with the bracket 5; the input end of the crank-link mechanism 222 is in transmission connection with the output end of the second motor 221, and the output end of the crank-link mechanism 222 is in rotational connection with the vibrating screen body 21.

In detail, referring to fig. 6, the crank link mechanism 222 may include a first link 2221 and a second link 2222; the first link 2221 serves as a crank, the first link 2221 being connected to the rotation shaft of the second motor 221, the length direction of the first link 2221 being the radial direction of the rotation shaft of the second motor 221. One end of the second link 2222 is rotatably connected to the first link 2221, and the other end of the second link 2222 is rotatably connected to the shaker body 21. The second motor 221 drives the crank link mechanism 222 to operate, at this time, the second link 2222 drives the vibrating screen body 21 to swing along with the swing rod 223, because two ends of the swing rod 223 are respectively in rotational connection with the vibrating screen body 21 and the bracket 5, the swing rod 223 drives the vibrating screen body 21 to swing back and forth between the air suction assembly 3 and the roller screen assembly 1, thereby realizing the vibrating effect of the vibrating screen body 21.

In some embodiments, referring to fig. 1, the air intake assembly 3 includes an air intake housing 31, a volute 32, an impeller, and a fourth drive assembly 33; the air inlet shell 31 is communicated with the volute 32; the air inlet shell 31 is provided with a second feeding hole 301; the volute 32 is provided with a third discharge port 302; the impeller is located inside the volute 32 and is in driving connection with a fourth drive assembly 33.

In detail, referring to fig. 1, both the air intake housing 31 and the scroll 32 may be provided on the stand 5, and the second inlet 301 of the air intake housing 31 is located above the vibrating screen body 21 and near the second outlet 2101. The third discharge port 302 of the volute 32 may be connected to a pipe, and the end of the pipe remote from the third discharge port 302 is connected to a saxophone, i.e. a cyclone, for clean straw discharged from the third discharge port 302. The fourth drive assembly 33 may include a fourth motor drivingly connected to the impeller that rotates within the volute 32 to drive airflow from the second inlet 301 to the third outlet 302.

In some embodiments, referring to fig. 7, the inside wall of the trommel body 11 is provided with a plurality of protrusions 113 for carrying straw as the trommel body 11 rotates. The protrusions 113 are circumferentially located inside the trommel body 11, and the protrusions 113 may be arc-shaped.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A straw screening device, characterized by comprising:

A trommel assembly comprising a trommel body and a first drive assembly for driving the rotation of the trommel body; the rotary screen body is provided with a first feed inlet and a first discharge outlet; the rotary screen body is provided with first screen holes for discharging sand and soil;

A vibrating screen assembly comprising a vibrating screen body and a second driving assembly for driving the vibrating screen body to vibrate; the vibrating screen body is positioned below the first discharging hole and is used for collecting straws; the vibrating screen body is provided with a second discharge hole and a second screen hole for discharging sand;

The air suction assembly is provided with a second feeding hole and a third discharging hole, and the second feeding hole is positioned above the vibrating screen and is close to the second discharging hole; the air suction assembly is used for driving air flow to flow from the second feeding port to the third discharging port.

2. The straw screening device of claim 1, further comprising a conveyor assembly for conveying sand discharged by the trommel assembly and the vibrating screen assembly; the conveying assembly comprises a conveying belt and a third driving assembly for driving the conveying belt to rotate; the conveyor belt is located below the trommel body and the vibrating screen body.

3. The straw screening device according to claim 1, further comprising a stand; the rotary screen assembly, the vibrating screen assembly and the induced draft assembly are all arranged on the support.

4. A straw screening device according to claim 3, wherein the first drive assembly comprises a first motor; the rotary screen body is rotationally connected with the bracket; the rotary screen body is provided with an annular transmission rail; the output end of the first motor is provided with a driving wheel in transmission connection with the transmission rail.

5. A straw screening device according to claim 3, wherein the trommel assembly comprises a housing; the outer cover is sleeved on the outer side of the rotary screen body; and a leak hole for sand to pass through is arranged below the outer cover.

6. The straw screening device according to claim 3, further comprising a baffle for preventing straw on the vibrating screen body from falling off; the baffle is arranged on the bracket and is positioned between the rotary screen assembly and the induced draft assembly.

7. The straw screening device according to claim 3, wherein the second drive assembly comprises a second motor, a crank linkage and two pairs of swing arms; the two pairs of swing rods are respectively positioned at two sides of the vibrating screen body, one end of each swing rod is rotationally connected with the vibrating screen body, and the other end of each swing rod is rotationally connected with the bracket; the input end of the crank connecting rod mechanism is in transmission connection with the output end of the second motor, and the output end of the crank connecting rod mechanism is in rotary connection with the vibrating screen body.

8. The straw screening device of claim 1, wherein the air suction assembly comprises an air intake housing, a volute, an impeller, and a fourth drive assembly; the air inlet shell is communicated with the volute; the air inlet shell is provided with the second feeding hole; the volute is provided with the third discharge hole; the impeller is positioned in the volute and is in transmission connection with the fourth driving assembly.

9. The straw screening device of claim 1, wherein the trommel body is arranged obliquely and the first feed inlet is higher than the first discharge outlet.

10. The straw screening device according to claim 1, wherein a plurality of protrusions for carrying straw to rotate with the trommel body are arranged on the inner side wall of the trommel body.