CN116786423A - Screening plant is used in production of granule calcium stearate - Google Patents

Abstract

The application discloses a screening device for producing granular calcium stearate, which relates to the technical field of chemical product production equipment and comprises a grid conveyor, wherein a winnowing mechanism is arranged on the grid conveyor and comprises: the blowing assembly comprises a plurality of blowing units, and the area where the air flow emitted by each blowing unit contacts with the material conveying section of the grid conveying belt of the grid conveyor is a screening area; the powder collecting assembly comprises a negative pressure suction unit positioned above a material conveying section of the grid conveyer belt and a blanking containing unit positioned below the material conveying section of the grid conveyer belt, wherein the negative pressure suction unit is used for sucking granular calcium stearate dust, and the blanking containing unit is used for loading granular calcium stearate particles below the material conveying section of the grid conveyer belt.

Description

Screening plant is used in production of granule calcium stearate

Technical Field

The application relates to the technical field of chemical product production equipment, in particular to a screening device for producing granular calcium stearate.

Background

Calcium stearate, also known as calcium stearate, is generally prepared by reacting stearic acid with calcium hydroxide or calcium oxide, and is usually in powder form, but in practical application, in order to effectively reduce dust pollution during packaging, transportation and use, granular calcium stearate is used for replacing the powdery calcium stearate, and in practical production, the granular calcium stearate particles are required to be separated from the calcium stearate powder by a corresponding screening device.

The existing screening device is as follows: CN103331255B, the name of this patent is "shale shaker", this patent includes "box, the top of box one end is equipped with the feed inlet, the upper portion of box is equipped with vibrating motor, vibrating motor links to each other with the carriage of establishing in the box inside, the box between vibrating motor and the carriage is equipped with the sieve lid, the carriage is big lower part trapezoidal frame construction of taking gradient upper portion, the both ends of carriage are fixed with a plurality of screen cloth straining device from top to bottom respectively, be equipped with a plurality of middle crossbeam corresponding with a plurality of screen cloth straining device in the middle of the carriage, be equipped with the screen cloth between screen cloth straining device and the middle crossbeam respectively, the lower part of screen cloth is equipped with a plurality of supporting beam, the bottom of box is equipped with out the feed bin, the sieve mesh of upper screen cloth is greater than the sieve mesh of lower floor's screen cloth.

In practice, the screening mode of the granular calcium stearate product mainly screens off unqualified small particles through a vibrating screen and a cyclone separator, so that the granular calcium stearate product with high purity and uniform size is obtained, but the mode has the defects that the existing production process of the granular calcium stearate is that particles are directly formed after the reaction in a reaction kettle is finished, the obtained granular calcium stearate product has high water content, low particle density and easy breakage, and in the screening vibration process of a vibrating screen, the situation that the intact granular calcium stearate is broken due to severe collision easily occurs, so that the yield of the screened granular calcium stearate is reduced.

Disclosure of Invention

The application aims to provide a screening device for producing granular calcium stearate, which aims to solve the defects in the prior art.

In order to achieve the above object, the present application provides the following technical solutions:

the utility model provides a screening plant is used in production of granule calcium stearate, includes the net conveyer, be equipped with selection by winnowing mechanism on the net conveyer, selection by winnowing mechanism includes:

the blowing assembly comprises a plurality of blowing units, and the area where the air flow emitted by each blowing unit contacts with the material conveying section of the grid conveying belt of the grid conveyor is a screening area;

the broken powder collecting assembly comprises a negative pressure suction unit positioned above the grid conveyor belt conveying section and a blanking containing unit positioned below the grid conveyor belt conveying section, wherein the negative pressure suction unit is used for sucking granular calcium stearate dust, and the blanking containing unit is used for loading granular calcium stearate particles below the grid conveyor belt conveying section.

Preferably, the grid conveyor belt of the grid conveyor is provided with a grid conveyor belt conveying section parallel to the horizontal plane, and the top surface of the grid conveyor belt conveying section can be contacted with granular calcium stearate during conveying.

Preferably, the blower assembly further comprises a placement plate positioned below the conveying area section, each blower unit is mounted on the placement plate, and a plurality of height-adjustable support legs are mounted at the bottom of the placement plate.

Preferably, each blowing unit is a blower, and an air outlet of the blowing unit faces to the bottom surface of the grid conveyor belt of the conveying area section to form a screening area.

Preferably, the negative pressure suction unit comprises a negative pressure air inlet cover communicated with the negative pressure generating device, and a cover opening of the negative pressure air inlet cover is opposite to the screening area.

Preferably, the cover mouth department of negative pressure air inlet cover is equipped with limit for height subassembly, limit for height subassembly is including screen cloth unit, screen cloth unit can stop to accord with the granule calcium stearate of standard volume and take place too high jump.

Preferably, the height limiting assembly further comprises a mounting frame fixed with the cover opening of the negative pressure air inlet cover, a plurality of cross bars are fixed on the mounting frame, and each cross bar can support the screen unit in the mounting frame.

Preferably, the screen unit comprises two plate bodies, a plurality of through holes which are uniformly distributed are formed in each plate body, and each plate body is hinged with the cross rod through a hinge piece.

Preferably, a movable cavity is formed in each plate body, and a regulating unit capable of changing the flow quantity of the through holes is arranged in the movable cavity.

Preferably, the regulating unit comprises an inner frame body, wherein a plurality of plugging strips capable of partially covering the through holes are fixed in the inner frame body, the inner frame body is connected with a connecting rope which movably penetrates out of the movable cavity, and the extending end of the connecting rope is fixed with the mounting frame.

According to the screening device for producing the granular calcium stearate, the air flow generated by the air blast assembly in the running state is blown on the grid conveyor to form the screening area, so that the granular calcium stearate in the screening area can jump upwards, the calcium stearate dust can be separated, the granular calcium stearate and the crushed grains of the granular calcium stearate can be absorbed by the negative pressure suction unit, the crushed grains of the granular calcium stearate can pass through the grid conveyor of the grid conveyor to fall into the blanking containing unit, and the calcium stearate grains meeting the body type standard on the grid conveyor of the grid conveyor can move out of the screening area along with the running of the grid conveyor, so that the screening effect is achieved, the situation that the intact granular calcium stearate is cracked due to severe collision can be avoided, and the yield of the screened calcium stearate grains can be ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is an overall schematic diagram of a screening device for producing granular calcium stearate according to the present application;

FIG. 2 is a schematic view of a height limiting assembly of a screening apparatus for granular calcium stearate production of the present application above a conveying section of a mesh conveyor belt;

FIG. 3 is a schematic cross-sectional view of a roller of a screening device for producing granular calcium stearate according to the present application;

FIG. 4 is a schematic cross-sectional view of a feed tube of a screening apparatus for producing granular calcium stearate according to the present application;

FIG. 5 is a schematic illustration of the location of a notch of a screening device for granular calcium stearate production of the present application on a negative pressure air intake shroud;

FIG. 6 is a schematic illustration of the position of the blower assembly of a screening device for granular calcium stearate production of the present application on a mesh conveyor;

fig. 7 is a schematic diagram of a flow area of a hole body of a sieving device for producing granular calcium stearate according to the present application when a through hole is in a sieving state:

fig. 8 is a schematic diagram of a flow area of a hole body of a sieving device for producing granular calcium stearate in a reaming state:

fig. 9 is a schematic view of a shaft of a screening device for producing granular calcium stearate according to the application in a second angular position:

fig. 10 is a schematic view of the position of a plate body of a screening device for producing granular calcium stearate in a mounting frame according to the present application:

FIG. 11 is a schematic view of a gate frame of a screening apparatus for producing granular calcium stearate of the present application positioned inside a feed tube.

Reference numerals illustrate:

1. a mesh conveyor; 1.1, a grid conveyer belt material conveying section; 2. a blower assembly; 2.1, a blowing unit; 2.2, placing a plate; 2.3, supporting legs; 3. a crushed powder collection assembly; 3.1, a negative pressure suction unit; 3.11, negative pressure air intake cover; 3.2, blanking and containing units; 4. a height limiting assembly; 4.1, a screen unit; 4.11, a plate body; 4.12, through holes; 4.13, hinge; 4.131, sliding sleeve; 4.132, a hinged support; 4.14, an active cavity; 4.2, a mounting frame; 4.3, a cross bar; 5. a regulation unit; 5.1, an inner frame body; 5.2, plugging strips; 5.3, connecting ropes; 6. a collection trough; 7. a spring; 8. a collection box; 9. a flexible rubber layer; 10. a winding shaft; 11. lifting a rope; 12. a feeding tube; 13. a gate frame; 14. a roll shaft; 15. puncturing teeth; 16. a side rail; 17. a strip through hole; 18. a gear; 19. a rack; 20. a shaft lever; 21. a first tooth face block; 22. a second tooth face block; 24. a notch; 25. a blocking door; 26. an interface; 27. an elastic rope.

Detailed Description

In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-11, a screening device for producing granular calcium stearate according to an embodiment of the present application includes a mesh conveyor 1, a winnowing mechanism is disposed on the mesh conveyor 1, and the winnowing mechanism includes:

the blowing assembly 2 comprises a plurality of blowing units 2.1, and the area where the air flow emitted by each blowing unit 2.1 contacts with the material conveying section of the grid conveying belt of the grid conveyor 1 is a screening area;

the crushed powder collecting assembly 3 comprises a negative pressure suction unit 3.1 positioned above the conveying section of the grid conveyor belt and a blanking containing unit 3.2 positioned below the conveying section of the grid conveyor belt, wherein the negative pressure suction unit 3.1 is used for sucking granular calcium stearate dust, and the blanking containing unit 3.2 is used for loading granular calcium stearate crushed particles below the conveying section of the grid conveyor belt;

the top of the grid conveyor belt of the grid conveyor 1 is a conveying surface which is parallel to the horizontal ground where the conveying surface is positioned, the mesh of the grid conveyor belt of the grid conveyor 1 plays a role of a screen in a screening area, and calcium stearate particles which are smaller than the aperture of the mesh of the grid conveyor belt can pass through the screen, so that in the actual use process, air flow generated by an air blast assembly in a running state blows on the grid conveyor belt of the grid conveyor to form a screening area, so that granular calcium stearate in the screening area can jump upwards, and the separation of calcium stearate dust, granular calcium stearate and crushed particles of the granular calcium stearate is facilitated, namely, the calcium stearate dust is absorbed by a negative pressure suction unit, the crushed particles of the granular calcium stearate pass through the grid conveyor belt of the grid conveyor and fall into a blanking containing unit, and the calcium stearate particles which are positioned on the grid conveyor belt of the grid conveyor and meet the body type standard move out of the screening area along with the running of the grid conveyor, thereby the screening effect is achieved, and the situation that the granular calcium stearate particles are broken by severe collision is avoided, and the finished product rate after the screening of the calcium stearate particles is ensured;

the blanking containing unit 3.2 comprises a collecting box 8 positioned in the ring of the ring-shaped grid conveying belt of the grid conveyor 1, the box body of the collecting box 8 is fixed with the machine body of the grid conveyor 1 through a connecting piece, the opening of the collecting box 8 faces upwards, and the collecting box 8 can receive calcium stearate particles falling on the whole conveying surface of the grid conveyor 1.

In another embodiment provided by the application, the grid conveyor belt of the grid conveyor 1 is provided with a grid conveyor belt conveying section 1.1 which is parallel to the horizontal plane, the top surface of the grid conveyor belt conveying section 1.1 can be contacted with granular calcium stearate during conveying, in particular, the grid conveyor belt is provided with two mutually conveying section surfaces on the grid conveyor 1, the two conveying section surfaces are parallel to the horizontal ground, and a sufficient placing space is reserved between the two conveying section surfaces, wherein the conveying section surface positioned above is the grid conveyor belt conveying section 1.1.

In still another embodiment provided by the application, the blower assembly 2 further comprises a placing plate 2.2 positioned below the conveying area section 1.1, each blower unit 2.1 is installed on the placing plate 2.2, a plurality of supporting legs 2.3 with adjustable heights are installed at the bottom of the placing plate 2.2, specifically, the placing plate 2.2 is positioned between two conveying section surfaces, the surface of the placing plate 2.2 is parallel to the surface of the grid conveying belt conveying section 1.1, each blower unit 2.1 is installed above the surface of the placing plate 2.2, so that the blower unit 2.1 can blow upwards from the bottom of the grid conveying belt conveying section 1.1, the grid conveying section 1.1 has upward blowing force to form a screening area, the supporting legs 2.3 are vertically fixed with the bottom of the placing plate 2.2, a threaded rod is spirally sleeved with a threaded cylinder at the bottom of the threaded rod, the bottom of the threaded cylinder is rotationally connected with the collecting box 8, anti-skid threads are arranged outside the threaded cylinder, and the height of the supporting legs 2.1.1 is controlled to be inclined plane of the top of the grid conveying section 2.1 by rotating the threaded rod, thereby the top of the grid conveying section 2.1 is controlled by changing the depth of the supporting legs in the threaded rod, and the top surface of the grid conveying section 2.1 is prevented from piling up.

In still another embodiment provided by the application, each blowing unit 2.1 is a blower, the air outlet of each blowing unit 2.1 is opposite to the bottom surface of the grid conveyor belt of the conveying area section 1.1 to form a screening area, the air inlet of the blower is communicated with the outside atmosphere through an air inlet pipe, the air outlet of the blower forms a screening area on the grid conveyor belt of the conveying area section 1.1 to form a rectangular area, specifically, the air outlet of the blower is sleeved with an air outlet pipe with a rectangular cross section, the pipe orifice of the air outlet pipe is opposite to the bottom surface of the grid conveyor belt of the conveying area section 1.1, further, a flat pushing door plate is arranged on the pipe orifice of the air outlet pipe, and the area of the screening area is indirectly changed by controlling the movement of the flat pushing door plate.

In still another embodiment provided by the application, the negative pressure suction unit 3.1 comprises a negative pressure air inlet cover 3.11 communicated with the negative pressure generating device, the cover opening of the negative pressure air inlet cover 3.11 faces downwards, the cover opening section of the negative pressure air inlet cover 3.11 is rectangular, the cover opening of the negative pressure air inlet cover 3.11 faces to the screening area, the negative pressure air flow in the negative pressure air inlet cover 3.11 enables calcium stearate dust lifted by the screening area to be sucked, and then the sucked dust is guided into cyclone separator screening equipment for further screening.

In still another embodiment provided by the application, the height limiting assembly 4 is arranged at the cover opening of the negative pressure air inlet cover 3.11, the height limiting assembly 4 comprises a screen unit 4.1, the screen unit 4.1 can prevent the excessive jump of granular calcium stearate conforming to the standard volume, wherein the screen unit 4.1 has two states, namely a screening state and a reaming state, and the volume of particles allowed to pass through by the screen unit 4.1 in the screening state is smaller than the volume of particles allowed to pass through by the screen unit 4.1 in the reaming state.

In still another embodiment provided by the application, the height limiting assembly 4 further comprises a mounting frame 4.2 fixed with the cover opening of the negative pressure air inlet cover 3.11, a plurality of cross bars 4.3 are fixed on the mounting frame 4.2, each cross bar 4.3 can support a screen unit 4.1 in the mounting frame 4.2, wherein the rod bodies of each cross bar 4.3 are cylindrical polished rods, the cross bars 4.3 are mutually parallel, the screen unit 4.1 comprises two plate bodies 4.11, each plate body 4.11 is provided with a plurality of uniformly distributed through holes 4.12, each plate body 4.11 is hinged with the cross bar 4.3 through a hinge piece 4.13, a movable cavity 4.14 is arranged in each plate body 4.11, and a regulating unit 5 capable of changing the flow rate of the through holes 4.12 is arranged in the movable cavity 4.14;

the two plate bodies 4.11 are hinged through a hinge piece, at the moment, the two plate bodies 4.11 form a symmetrically bendable deformation plate, one end far away from the hinge piece is the end of the deformation plate, the length direction line of the cross rod 4.3 is perpendicular to the different moving direction surface of the grid conveying belt of the conveying area section 1.1, the length direction of the deformation plate is consistent with the length direction of the cross rod 4.3, the movable cavity 4.14 is a rectangular cavity, the inner wall surface of the rectangular cavity is parallel to the corresponding plate surface of the plate body 4.11, in the actual use process, when the included angle between the two plate bodies 4.11 is 180, the screen unit 4.1 is in a screening state, when the included angle between the two plate bodies 4.11 is smaller than 180, the screen unit 4.1 is in a reaming state, and the screen unit 4.1 in the reaming state has a shape of being an upward bulge structure;

the hole body shape of the through holes 4.12 is an equilateral triangle, each through hole 4.12 is distributed on the plate body 4.11 in a rectangular array, and it is required to be specially explained that the bottom edge of the equilateral triangle is parallel to the end line of the plate body 4.11, namely, the bottom edge of the equilateral triangle is parallel to the end line of the deformation plate, sharp angles of the equilateral triangle on the two plate bodies 4.11 point to the hinge part hinging direction between the two plate bodies 4.11, and the equilateral triangle on the deformation plate is in mirror symmetry about the hinge part hinging position between the two plate bodies 4.11;

the hinge 4.13 includes a sliding sleeve 4.131 slidably sleeved on the cross bar 4.3, a hinge seat 4.132 hinged to the end of the deformation plate is mounted on the sleeve body of the sliding sleeve 4.131, and in actual use, the sliding sleeve 4.131 can slide along the cross bar 4.3 according to the state change of the screen unit 4.1, specifically, when the screen unit 4.1 is converted into a reaming state, the sliding sleeve 4.131 slides towards the midpoint of the cross bar 4.3, and when the screen unit 4.1 is converted into a screening state, the sliding sleeve 4.131 slides towards the endpoint of the cross bar 4.3.

In still another embodiment provided by the application, the collecting long grooves 6 are fixed on two sides of the machine body of the grid conveyor 1, the length direction of the collecting long grooves 6 is parallel to the length direction of the grid conveyor 1, and the groove bodies of the collecting long grooves 6 can receive the crushed particles of the calcium stearate sliding off the screen unit 4.1.

In still another embodiment provided by the application, the regulating unit 5 comprises an inner frame body 5.1, a plurality of plugging strips 5.2 capable of partially covering the through holes 4.12 are fixed in the inner frame body 5.1, the inner frame body 5.1 is connected with a plurality of connecting ropes 5.3 capable of movably penetrating out of the movable cavity 4.14, the number of the connecting ropes 5.3 is multiple, the extending ends of the connecting ropes 5.3 are fixed with the mounting frame 4.2, one end of the connecting ropes 5.3 positioned in the movable cavity 4.14 is fixed with the inner frame body 5.1, specifically, the length direction of the plugging strips 5.2 is parallel to the end line of the plate body 4.11, the strips of the plugging strips 5.2 can be in contact with the cavity wall surface of the movable cavity 4.14 with the through holes 4.12, the inner frame body 5.1 is a rectangular frame, the length direction line of the movable cavity 4.14 can be in straight reciprocating motion in the length direction of the movable cavity 4.14, the length direction line of the movable cavity 4.14 is parallel to the end of the plate body 4.11 and the end of the plate body 4.11, the same area of the hinge can be connected with the end of the movable cavity 4.11, and the end line of the same through the plugging strips 4.11 can be connected with the wall surface of the hinge 5.7, and the corresponding part of the plugging strips 4.2 can be connected with the wall surface of the through holes 4.7;

in the actual use process, when the included angle between the two plate bodies 4.11 is 180, the covering surface of the plugging strip 5.2 on the through holes 4.12 is in the largest state, the opening of the through holes 4.12 is in the smallest state, namely the flow quantity of the through holes 4.12 is the smallest, only small calcium stearate particles, calcium stearate dust and air flow generated by a blower can pass through, the larger calcium stearate particles are blocked, meanwhile, the spring 7 is in a natural unfolding state, when the number of the plugging through holes 4.12 in the smallest state is large, the air permeability of the two plate bodies 4.11 is weakened, part of the air flow forms upward thrust at the bottom of the plate bodies 4.11, the hinge joint between the two plate bodies 4.11 is upwards raised, so that the included angle between the two plate bodies 4.11 is smaller than 180 degrees, in the process, the unit 4.1 is converted into a state from a screen blocking state, the aperture is increased, the plug in the through holes 4.12 can be separated from the two plate bodies, and the two plate bodies can recover the air permeability under the action of the two screen bodies 4.11, and the included angle is recovered under the action of the two screen bodies 180;

in addition, the hinge joint between the two plate bodies 4.11 is covered with a flexible rubber layer 9, and the side edge of the flexible rubber layer 9 is fixed with the plate bodies 4.11, so that air leakage caused by gaps between the two plate bodies 4.11 is prevented, the integrity of the deformation plate is improved, and the deformation plate has good barrier screening effect on calcium stearate particles;

it should be further noted that, in the process that the hinge joint between the two plates 4.11 is raised upwards, at this time, the sliding sleeve 4.131 slides towards the midpoint direction of the cross rod 4.3, and the inner frame 5.1 cannot move along with the plates 4.11 under the action of the connecting rope 5.3, so that the inner frame 5.1 and the plugging strip 5.2 are relatively displaced in the movable cavity 4.14, the spring 7 is elastically deformed, so that the coverage area of the plugging strip 5.2 to the through hole 4.12 is reduced, the actual flowable aperture of the through hole 4.12 is enlarged, and in the same way, when the included angle between the two plates 4.11 is restored to 180 degrees, at this time, under the action of the elastic restoring force of the spring 7, the inner frame 5.1 and the plugging strip 5.2 are relatively restored to displace in the movable cavity 4.14, and the coverage area of the plugging strip 5.2 to the through hole 4.12 is restored to the initial position.

In still another embodiment provided by the application, the negative pressure air inlet cover 3.11 is rotatably provided with the winding shaft 10, the winding shaft 10 is winded and connected with the lifting rope 11, one end of the lifting rope 11 is connected with the end part of the plate body 4.11, which is provided with the hinge piece, when the winding shaft 10 rotates forward to wind the lifting rope 11, the lifting rope 11 forms upward pulling force on the middle part of the deformation plate at the moment, so that the hinge joint between the two plate bodies 4.11 is raised upwards, and the screen unit 4.1 is conveniently converted into a reaming state from a screening state;

the utility model provides a take place to rotate when the grid conveyer belt of grid conveyer 1 is contacted, each thorn tooth 15 can insert with the mesh hole on the grid conveyer belt that contacts simultaneously, thereby extrude the calcium stearate grain in the mesh hole on the grid conveyer belt, keep the grid conveyer belt to have good ventilation when getting into the screening region, also play the anti-skidding effect of roller 14 on the grid conveyer belt of grid conveyer 1, and the calcium stearate grain that extrudes also falls into blanking splendid attire unit 3.2 under the action of gravity, 14 is in the rotation process, be fixed with a plurality of thorns 15 on roller 14, roller 14 can take place the rotation when the grid conveyer belt of grid conveyer 1, each thorn tooth 15 can be with the mesh hole on the grid conveyer belt that contacts, thereby the grid conveyer belt has good ventilation when getting into the screening region, the grid conveyer belt also has the anti-skidding effect of roller 14 on the grid conveyer belt, and the calcium stearate grain that extrudes also falls into blanking splendid attire unit 3.2 under the action of gravity, 14 is in the rotation process, the reciprocal motion in vertical direction in the feed pipe 12, the side of roller 13 is fixed with the grid conveyer belt 16, the grid conveyer belt is equipped with grid conveyer belt's 16, the grid conveyer belt is smooth and the grid conveyer belt is equipped with the grid conveyer belt is 16, the grid conveyer belt is equipped with the grid conveyer belt is in the grid conveyer belt's 16 is smooth and the grid conveyer belt is equipped with the grid conveyer belt's 16 is along with the grid conveyer belt's direction is smooth, the grid is 16 along with the grid conveyer belt's direction is vertical to the grid 12 is vertical with the grid 12.

In still another embodiment of the present application, a vertical long-strip through hole 17 is formed on one side of the feeding tube 12, which is close to the negative pressure air intake cover 3.11, one end of the side cross bar 16 extends out of the long-strip through hole 17, one end of the winding shaft 10, which is close to the feeding tube 12, extends out of the negative pressure air intake cover 3.11, a gear 18 is fixed on one end of the winding shaft 10, which is close to the negative pressure air intake cover 3.11, a vertical rack 19 is fixed on one end of the side cross bar 16, which extends out of the long-strip through hole 17, a tooth surface of the rack 19 faces the meshing tooth surface of the gear 18, a shaft 20 perpendicular to a horizontal plane is arranged between the rack 19 and the gear 18, a first tooth surface block 21 capable of being meshed with the rack 19 is fixed on one side of the shaft 20, a second tooth surface block 22 capable of being meshed with the gear 18 is fixed on the other side of the shaft 20, when the shaft is axially rotated to a first angular position, and when the shaft 18 is meshed with the second tooth surface block 22, and when the shaft 18 is axially rotated to a second angular position, the gear 19 is separated from the first angular position to the first angular position, the gear 20 is rotated to a first angular position, and the shaft 20 is rotated to a forward angular position from the second angular position to a first angular position to a second angular position to a desired angular position, preferably a forward position to be rotated about a forward position to be 20, and a forward angular position to be 20, and a position to be rotated to be 20;

when the shaft lever axially rotates to a first angle position, the shaft lever 20 and the rack 19 can synchronously reciprocate in the vertical direction, meanwhile, the gear 18 drives the winding shaft 10 to deflect at the second tooth surface block 22, specifically, when the rack 19 moves upwards, the winding shaft 10 rotates forward to wind the lifting rope 11, when the rack 19 moves downwards, the winding shaft 10 rotates forward to release the lifting rope 11, and when the shaft lever axially rotates to a second angle position, the movement of the rack 19 does not play a transmission role on the rotation of the winding shaft 10;

a gap 24 is formed on one side of the negative pressure air inlet cover 3.11, which is close to the feeding pipe 12, a blocking door 25 is movably hinged to the outer side of the gap 24, one end of the blocking door 25, which is far away from the hinged position, is connected with the gap 24 through an elastic rope 27, the opening and closing mode of the blocking door 25 is a flat-open type, a plug-in port 26 is fixed on the top end surface of the blocking door 25, the aperture center line of the plug-in port 26 coincides with the hinged center of the blocking door 25, the aperture cross section of the plug-in port 26 is rectangular, the cross section of a shaft lever 20 is rectangular, the shaft lever 20 is matched with the plug-in port 26, the shaft lever 20 can axially move in the plug-in port 26, in the practical use process, when the air permeability of the two plate bodies 4.11 is weakened, partial air flow forms upward thrust at the bottom of the plate bodies 4.11, and when the number of blocking through holes 4.12 in the minimum state is large, the action force of the air flow on the bottom of the plate body 4.11 can not enable the plate body 4.11 to change in position, namely the middle of the deformation plate is not raised upwards, at the moment, another part of air flow can flow towards the edge direction of the deformation plate, at the moment, the sealing door 25 at the edge position of the deformation plate is shifted forwards under the blowing of the air flow, so that the shaft lever 20 rotates to a first angle position from a second angle position, the elastic ropes 27 deform, when the air permeability of the two plate bodies 4.11 is recovered, at the moment, the action force of the sealing door 25 blown by the air flow is reduced, under the action of the elastic recovery force of the elastic ropes 27, at the moment, the sealing door 25 is recovered to an initial closing position, and the shaft lever axially rotates to the second angle position along with the sealing door 25, in the process, the assistance is provided for the raised deformation process of the middle of the deformation plate, and the process of converting the screen unit 4.1 from a screen blocking state to a reaming state is smoothly carried out.

While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.

Claims (10)

1. Screening plant is used in production of granule calcium stearate, including net conveyer (1), its characterized in that: the grid conveyor (1) is provided with a winnowing mechanism, and the winnowing mechanism comprises:

the blowing assembly (2) comprises a plurality of blowing units (2.1), and the area where the airflow sent by each blowing unit (2.1) contacts with the material conveying section of the grid conveying belt of the grid conveyor (1) is a screening area;

the broken powder collecting assembly (3) comprises a negative pressure suction unit (3.1) located above the conveying section of the grid conveying belt and a blanking containing unit (3.2) located below the conveying section of the grid conveying belt, wherein the negative pressure suction unit (3.1) is used for sucking granular calcium stearate dust, and the blanking containing unit (3.2) is used for loading granular calcium stearate particles below the conveying section of the grid conveying belt.

2. A screening device for the production of granular calcium stearate according to claim 1, characterized in that the grid conveyor belt of the grid conveyor (1) is provided with a grid conveyor belt transporting section (1.1) which is parallel to the horizontal plane, and the top surface of the grid conveyor belt transporting section (1.1) can be contacted with the granular calcium stearate during the transportation.

3. A screening device for the production of granular calcium stearate according to claim 2, characterized in that the blower assembly (2) further comprises a placement plate (2.2) located below the conveying section (1.1), each blower unit (2.1) being mounted on the placement plate (2.2), the bottom of the placement plate (2.2) being provided with a plurality of height-adjustable support legs (2.3).

4. A screening device for the production of granular calcium stearate according to claim 3, characterized in that each of the blowing units (2.1) is optionally a blower, the air outlet of the blowing unit (2.1) being directed against the bottom face of the mesh conveyor belt of the conveying section (1.1) to form the screening zone.

5. A screening device for producing granular calcium stearate according to claim 1, characterized in that the negative pressure suction unit (3.1) comprises a negative pressure air inlet hood (3.11) communicated with the negative pressure generating device, and the hood opening of the negative pressure air inlet hood (3.11) is opposite to the screening area.

6. The screening device for producing granular calcium stearate according to claim 5, wherein a height limiting assembly (4) is arranged at a cover opening of the negative pressure air inlet cover (3.11), the height limiting assembly (4) comprises a screen unit (4.1), and the screen unit (4.1) can prevent the granular calcium stearate meeting the standard volume from jumping too high.

7. The screening device for producing granular calcium stearate according to claim 6, wherein the height limiting assembly (4) further comprises a mounting frame (4.2) fixed with a cover opening of the negative pressure air inlet cover (3.11), a plurality of cross bars (4.3) are fixed on the mounting frame (4.2), and each cross bar (4.3) can support the screen unit (4.1) in the mounting frame (4.2).

8. A screening device for the production of granular calcium stearate according to claim 7, characterized in that the screen unit (4.1) comprises two plates (4.11), each plate being provided with a plurality of evenly distributed through holes (4.12), each plate (4.11) being hinged to the cross bar (4.3) by means of a hinge (4.13).

9. The screening device for producing granular calcium stearate according to claim 8, wherein a movable cavity (4.14) is provided in each plate body (4.11), and a regulating unit (5) capable of changing the flow rate of the through holes (4.12) is provided in the movable cavity (4.14).

10. A screening device for the production of granular calcium stearate according to claim 9, characterized in that the regulating unit (5) comprises an inner frame body (5.1), wherein a plurality of blocking strips (5.2) capable of partially covering the through holes (4.12) are fixed in the inner frame body (5.1), the inner frame body (5.1) is connected with a connecting rope (5.3) which movably penetrates through the movable cavity (4.14), and the extending end of the connecting rope (5.3) is fixed with the mounting frame (4.2).