CN112958436B

CN112958436B - Positive and negative pressure reverse type fine flour screening device

Info

Publication number: CN112958436B
Application number: CN202110157679.5A
Authority: CN
Inventors: 宋飞; 宋孝海
Original assignee: Anhui Xuelian Flour Co ltd
Current assignee: Anhui Xuelian Flour Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-07-05
Anticipated expiration: 2041-02-04
Also published as: CN112958436A

Abstract

The invention relates to the technical field of flour screening devices, in particular to a positive and negative pressure reverse type flour fine screening device which comprises a box body and a power mechanism, wherein a vertically arranged screening box is arranged in the box body, the screening box is rotatably connected with the box body, the screening box comprises a feeding part for conveying flour to the interior of the screening box, a discharging part for discharging sundries and two oppositely arranged screening surfaces, filtering holes for filtering the flour are formed in the screening surfaces, the power mechanism drives the screening box to reciprocate left and right in the box body, and the screening surfaces are enabled to impact the inner wall, close to the screening surfaces, of the box body in a reciprocating mode by swinging the screening box. This device utilizes the motion of screening case to produce the gas series flow effect, not only reduces the probability that the filtration pore blockked up, can reach quick screening effect simultaneously.

Description

Positive and negative pressure reverse type fine flour screening device

Technical Field

The invention relates to the technical field of flour screening devices, in particular to a positive and negative pressure reverse type flour fine screening device.

Background

During flour processing, one very important step is exactly the flour edulcoration, gets rid of through the impurity that the granule in with the flour is greater than the flour through screening plant among the prior art, and the jam of screen cloth is the problem that needs a urgent solution of flour sieve extension always among the screening process.

Disclosure of Invention

The invention aims to solve the defect that the sieve pores for sieving flour are easy to block in the prior art, and provides a positive and negative pressure reverse type flour fine sieving device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the positive and negative pressure reverse type fine flour screening device comprises a box body and a power mechanism, wherein a vertically arranged screening box is arranged in the box body, the screening box is rotatably connected with the box body, the screening box comprises a feeding part for conveying flour to the interior of the screening box, a discharging part for discharging sundries and two screening surfaces which are arranged oppositely, filtering holes for filtering the flour are formed in the screening surfaces, the power mechanism drives the screening box to swing in a left-right reciprocating mode in the box body, and the screening surfaces are made to impact the box body in a reciprocating mode to be close to the inner wall of the screening surfaces by swinging the screening box.

The power mechanism is one of a crank slider mechanism and a power telescopic cylinder assembly.

The vertical cross-section of box is the V-arrangement structure, the box has two inclined plane boards that contract downwards, two the screening face sets up in screening case both sides, two the inclined plane board corresponds two screening faces respectively, feeding portion sets up at screening roof portion, feeding portion has feed-through hole, contains miscellaneous flour and gets into the screening incasement through feed-through hole, it sets up in screening bottom of the case portion to arrange material portion, it includes the miscellaneous material discharge pipe of a plurality of vertical setting side by side, a plurality of miscellaneous material discharge pipe one end and screening case intercommunication and rigid coupling together, one end extend to the box outside, miscellaneous material discharge pipe bottom is equipped with the ooff valve, miscellaneous material discharge pipe rigid coupling has the back shaft of level setting, the back shaft rotates with the box bottom plate of box to be connected, the miscellaneous material discharge pipe is arranged in the outside one end of box and is connected power unit.

The power mechanism comprises a rotating motor, a disc is fixedly connected to a power output shaft of the rotating motor, a connecting rod is eccentrically connected to the disc, one end, far away from the disc, of the connecting rod is rotatably connected with one end, located outside the box body, of the sundry discharge pipe, the power mechanism drives the sundry discharge pipe to swing left and right around the supporting shaft, and the screening surface repeatedly impacts the inclined plane plate.

Screening case upper end rigid coupling has first arc, the inclined plane board of box both sides is run through at first arc both ends, just first arc and inclined plane board sliding connection and sealed setting, screening case lower extreme rigid coupling has the second arc, the inclined plane board of box both sides is run through at second arc both ends, just second arc and inclined plane board sliding connection and sealed setting, first arc, second arc all set up with the back shaft is concentric, form sealed first cavity between first arc, second arc and the box, the box is located the flour discharge port has been seted up to the position of first cavity, form the second cavity between first arc upper portion and the box, contain miscellaneous flour and arrange in the second cavity, contain miscellaneous flour and get into the screening incasement through the feeding through-hole.

The screening surface of screening case both sides all is rigid coupling has an elasticity bellows, elasticity bellows surrounds the filtration pore.

The box is located the position of first cavity and is equipped with one-way admission valve, the flour discharge port has powder collection case through the pipe connection, powder collection case is connected with and is used for making the inside aspiration pump that produces the negative pressure of powder collection incasement.

The sundries discharging pipe is connected with a sundries collecting box through a hose, the sundries collecting box is communicated with the second chamber through a flour pump, and the flour containing sundries in the sundries collecting box is conveyed into the second chamber through the flour pump.

A plurality of shifting rods are fixedly connected to the first arc-shaped plate and located at the top of the screening box, and the shifting rods and the feeding through holes are arranged in a staggered mode.

A plurality of main helical springs are fixedly connected in the screening box, and a plurality of branch springs perpendicular to the main helical springs are fixedly connected on the main helical springs.

The positive and negative pressure reversal type fine flour screening device provided by the invention has the beneficial effects that: this device utilizes the motion of screening case to produce the gas series flow effect, not only reduces the probability that the filtration pore blockked up, can reach quick screening effect simultaneously.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the impact structure between the screening box and the left inclined plane plate of the present invention;

FIG. 3 is an enlarged schematic view of the screening box of the present invention;

FIG. 4 is a schematic perspective view of the screening box of the present invention;

fig. 5 is a schematic view of a three-dimensional half-section structure of the screening box of the present invention.

In the figure: the device comprises a deflector rod 1, a feeding through hole 2, a first arc-shaped plate 3, a box body 4, a main spiral spring 5, a branch spring 6, a flour discharge port 7, a second arc-shaped plate 8, an air suction pump 9, a powder collecting box 10, a disc 11, a connecting rod 12, a sundry material collecting box 13, a flour pump 14, a support shaft 15, a box body bottom plate 16, a screening box 17, an elastic corrugated pipe 18, a first cavity 19, a second cavity 20, a sundry material discharge pipe 21, a filter hole 22, an inclined plane plate 23 and a one-way air inlet valve 24.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a positive and negative pressure reverse type fine flour screening device comprises a box body 4 and a power mechanism, wherein a vertically arranged screening box 17 is arranged in the box body 4, the screening box 17 is rotatably connected with the box body 4, the screening box 17 comprises a feeding part for conveying flour to the interior of the screening box, a discharging part for discharging sundries and two oppositely arranged screening surfaces, a filtering hole 22 for filtering the flour is formed in each screening surface, the power mechanism drives the screening box 17 to reciprocate left and right in the box body 4, and the screening surfaces are made to repeatedly impact the inner wall, close to the screening surfaces, of the box body 4 through swinging the screening box 17.

When the device sieves flour, flour containing impurities is conveyed into the sieving box 17 through the feeding part, the sieving box 17 is driven by the power mechanism to swing back and forth left and right in the box body 4, the inner walls of the box body 4 positioned at two sides of a sieving surface are repeatedly impacted when the sieving box 17 swings, when the sieving surface is close to the inner wall of the box body 4, air between the sieving surface and the inner wall corresponding to the box body 4 is compressed, airflow between the sieving surface and the inner wall enters the sieving box 17 through the filtering hole 22 and is discharged from the sieving surface at the other side, the blocked sieve pores are dredged by the movement of the airflow, meanwhile, the flour with particles smaller than the filtering hole 22 is driven by the discharged airflow to fall into the box body 4, the flour in the sieving box 17 is discharged, impurities are remained in the sieving box body, vibration can be generated under the impact effect, the blockage of the sieve pores is further avoided by utilizing the vibration, after one-time impact is completed, the sieving box 17 swings reversely, when the screening box 17 leaves the box inner wall which is just collided and moves to the other side, negative pressure is instantly generated between the screening box and the box inner wall, the purpose of dredging the sieve pores is achieved again by utilizing the negative pressure, the screening surfaces at the two sides of the screening box 17 are fixedly connected with an elastic corrugated pipe 18, the elastic corrugated pipe 18 surrounds the filtering pores 22, the elastic corrugated pipe 18 is made of food-grade silica gel materials, when the elastic corrugated pipe 18 collides with the box inner wall, a gradually compressed cavity is formed among the elastic corrugated pipe 18, the screening box 17 and the box inner wall, the air flow strength is improved, flour is better carried to be discharged out of the screening box 17, and meanwhile, the filtering pores 22 are better dredged, and when the screening case 17 kept away from the box inner wall of striking in the twinkling of an eye, also can produce the negative pressure effect, do benefit to the discharge of flour and the mediation of filtration pore, flour discharges screening case 17 through filtering the pore, and the impurity that leaves is discharged through the row material portion of screening case 17.

This device utilizes the motion of screening case to produce the gas effect of streaming, and the air current through streaming drives the flour that drifts away and passes the filtration pore, not only reduces the probability that the filtration pore blockked up, can reach quick screening effect simultaneously.

The power mechanism is one of a crank slide block mechanism and a power telescopic cylinder component, and the crank slide block mechanism or the power telescopic cylinder component is used for driving the sieving box 17 to swing back and forth.

The vertical section of the box body 4 is of a V-shaped structure, the box body 4 is provided with two inclined plane plates 23 which contract downwards, the two screening surfaces are arranged at two sides of the screening box 17, the two inclined plane plates 23 respectively correspond to the two screening surfaces, the screening surfaces of the screening box 17 are better attached to the inclined plane plates 23, the feeding part is arranged at the top of the screening box 17 and is provided with a feeding through hole 2, flour containing impurities enters the screening box 17 through the feeding through hole 2, the discharging part is arranged at the bottom of the screening box 17 and comprises a plurality of impurity discharging pipes 21 which are vertically arranged side by side, one ends of the impurity discharging pipes 21 are communicated with the screening box 17 and are fixedly connected together, one ends of the impurity discharging pipes extend to the outside of the box body 4, the bottom end of the impurity discharging pipe 21 is provided with a switch valve which is closed, the filtered impurities and the unfiltered flour are collected in the impurity discharging pipe 21, the switch valve is opened once to discharge the materials collected in the impurity discharging pipe 21 every time, the sundry discharge pipe 21 is fixedly connected with a support shaft 15 which is horizontally arranged, the support shaft 15 is rotatably connected with a box body bottom plate 16 of the box body 4, and one end of the sundry discharge pipe 21 which is arranged outside the box body 4 is connected with a power mechanism.

The power mechanism comprises a rotating motor, a disc 11 is fixedly connected to a power output shaft of the rotating motor, a connecting rod 12 is eccentrically connected to the disc 11, one end, far away from the disc 11, of the connecting rod 12 is rotatably connected with one end, located outside the box body 4, of the sundry discharge pipe 21, the power mechanism drives the sundry discharge pipe 21 to swing left and right around the supporting shaft 15, and the screening surface repeatedly impacts the inclined plane plate 23.

Referring to fig. 1-5, the rotary motor drives the disc 11 to rotate, the eccentrically arranged connecting rod 12 drives the sundry discharge pipe 21 and the screening box 17 to rotate around the supporting shaft 15, the continuous reciprocating swing of the screening box 17 can be realized to impact the inclined plane plate 23 of the box body 4 through the structure, and the rotary motor in the crank-slider mechanism only needs to rotate towards one direction all the time, so that the effect of driving the screening box 17 to swing is better than that of driving the screening box 17 to stretch and retract repeatedly in a power stretching and retracting mode.

Referring to fig. 2 and 4, a first arc-shaped plate 3 is fixedly connected to the upper end of a screening box 17, two ends of the first arc-shaped plate 3 penetrate through inclined plane plates 23 on two sides of a box body 4, the first arc-shaped plate 3 and the inclined plane plates 23 are slidably connected and hermetically arranged, a second arc-shaped plate 8 is fixedly connected to the lower end of the screening box 17, two ends of the second arc-shaped plate 8 penetrate through the inclined plane plates 23 on two sides of the box body 4, the second arc-shaped plate 8 and the inclined plane plates 23 are slidably connected and hermetically arranged, the first arc-shaped plate 3 and the second arc-shaped plate 8 are concentrically arranged with a supporting shaft 15, a sealed first chamber 19 is formed between the first arc-shaped plate 3 and the box body 4, a flour discharge port 7 is formed in the position of the box body 4 at the first chamber 19, a second chamber 20 is formed between the upper part of the first arc-shaped plate 3 and the box body 4, flour-containing powder is placed in the second chamber 20, the flour-containing powder enters the screening box 17 through a feeding through hole 2, a plurality of deflector rods 1 are fixedly connected to the first arc-shaped plate 3, deflector rod 1 is located screening case 17 top, and deflector rod 1 and feed through 2 are crisscross to be set up, and through deflector rod 1 better make the flour of top pass through feed through 2 and get into in the screening case 17.

The sundries discharging pipe 21 is connected with a sundries collecting box 13 through a hose, the sundries collecting box 13 is communicated with the second chamber 20 through a flour pump 14, and the flour containing sundries in the sundries collecting box 13 is conveyed into the second chamber 20 through the flour pump 14.

The flour containing impurities is loaded into the second chamber 20 through a loading device, flour is loaded through a flour pump or a screw conveyor, so that the flour containing impurities is always kept in a certain amount in the second chamber 20, the flour containing impurities in the second chamber 20 cannot be too much, if the flour containing impurities is too much, large pressure is generated on the screening box 17 and the first arc-shaped plate 3, the screening box 17 is difficult to swing, if the flour containing impurities on the screening box is too little, the upper pressure is too small, when the elastic corrugated pipe 18 is compressed, gas can be upwards discharged through the feeding through hole 2, the effects of dredging the filtering hole and screening the flour are difficult to achieve, generally, the horizontal plane of the flour containing impurities does not exceed 10-40 cm of the highest position of the first arc-shaped plate 3, preferably 20-30 cm, the second chamber 20 can also be in a sealed state, if the second chamber 20 is in a sealed structure, the thickness of the flour containing impurities can be properly reduced, can be controlled at 10-20 cm;

when the screening box 17 drives the first arc-shaped plate 3 to swing together, the flour containing impurities above continuously passes through the feeding through hole 2 and is scattered in the screening box 17, the flour containing impurities scattered in the screening box 17 is in a scattered and disordered state, then in the compression process of the elastic corrugated pipe 18, the scattered flour falls into the first chamber 19 through the filter hole 22 by air flow, the flour passing through the filter hole is discharged from the flour discharge port 7, part of the flour which is not carried away and the impurities which are filtered are collected in the sundries discharge pipe 21, then the switch valve is opened once every time the machine works for a period of time, so that the collected impurity flour enters the sundries collecting box 13, then the impurity flour is conveyed into the second chamber 20 for secondary screening by the flour pump 14 periodically, after working for a long time, the addition of new impurity flour is stopped, and a large amount of filtered impurity flour is taken out.

The box 4 is provided with a one-way air inlet valve 24 at the position of the first cavity 19, the flour outlet 7 is connected with a flour collecting box 10 through a pipeline, the flour collecting box 10 is connected with an air pump 9 for enabling the interior of the flour collecting box 10 to generate negative pressure, and the air inlet of the air pump is provided with a vibration mechanism and a dust filtering component to prevent dust from entering the air pump. The flour collecting box 10 is in a micro-negative pressure state through the air pump 9, the flour discharge port 7 is in a micro-negative pressure state, and flour passing through the filter holes is better collected in the flour collecting box 10.

The internal rigid coupling of screening case 17 has a plurality of main coil spring 5, and the rigid coupling has a plurality of branch spring 6 with the perpendicular setting of main coil spring 5 on main coil spring 5, and when screening case 17 striking box 4 inner walls, main coil spring 5 and branch spring 6 can produce the vibration, and the better messenger gets into the inside miscellaneous flour that contains of screening case 17 and is the disorderly form that wafts in screening case 17, and the flour that wafts is better carried by the air current and passes filtration pore 22.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any technical solutions, concepts and designs obtained by equivalent substitutions or changes of the technical solutions and the inventive concepts of the present invention by those skilled in the art within the technical scope of the present invention shall be covered by the scope of the present invention.

Claims

1. A positive and negative pressure reversal type fine flour screening device comprises a box body (4) and a power mechanism, it is characterized in that a screening box (17) which is vertically arranged is arranged in the box body (4), the screening box (17) is rotationally connected with the box body (4), the screening box (17) comprises a feeding part for conveying flour to the interior of the screening box, a discharging part for discharging sundries and two oppositely arranged screening surfaces, the screening surfaces are provided with filtering holes (22) for filtering the flour, the screening box (17) is driven by the power mechanism to reciprocate left and right in the box body (4), the sieving surface is made to impact the inner wall of the box body (4) close to the sieving surface in a reciprocating way by swinging the sieving box (17), the screening surfaces on the two sides of the screening box (17) are fixedly connected with an elastic corrugated pipe (18), and the elastic corrugated pipe (18) surrounds the filtering holes (22);

the vertical cross section of the box body (4) is of a V-shaped structure, the box body (4) is provided with two inclined plane plates (23) which contract downwards, the two screening surfaces are arranged on two sides of a screening box (17), the two inclined plane plates (23) correspond to the two screening surfaces respectively, the feeding part is arranged at the top of the screening box (17), the feeding part is provided with a feeding through hole (2), flour containing impurities enters the screening box (17) through the feeding through hole (2), the discharging part is arranged at the bottom of the screening box (17), the discharging part comprises a plurality of impurity discharging pipes (21) which are vertically arranged side by side, one ends of the impurity discharging pipes (21) are communicated with the screening box (17) and fixedly connected together, one ends of the impurity discharging pipes extend to the outside of the box body (4), the bottom end of the impurity discharging pipe (21) is provided with a switch valve, and the impurity discharging pipe (21) is fixedly connected with a supporting shaft (15) which is horizontally arranged, the supporting shaft (15) is rotatably connected with a box body bottom plate (16) of the box body (4), and one end of the sundry discharge pipe (21) arranged outside the box body (4) is connected with a power mechanism;

the screening box is characterized in that a first arc-shaped plate (3) is fixedly connected to the upper end of the screening box (17), two ends of the first arc-shaped plate (3) penetrate through inclined plane plates (23) on two sides of the box body (4), the first arc-shaped plate (3) is in sliding connection with the inclined plane plates (23) and is in sealing arrangement, a second arc-shaped plate (8) is fixedly connected to the lower end of the screening box (17), two ends of the second arc-shaped plate (8) penetrate through the inclined plane plates (23) on two sides of the box body (4), the second arc-shaped plate (8) is in sliding connection with the inclined plane plates (23) and is in sealing arrangement, the first arc-shaped plate (3) and the second arc-shaped plate (8) are arranged concentrically with a supporting shaft (15), a sealed first cavity (19) is formed between the first arc-shaped plate (3), the second arc-shaped plate (8) and the box body (4), a flour discharge port (7) is formed in the position of the box body (4) located in the first cavity (19), a second chamber (20) is formed between the upper part of the first arc-shaped plate (3) and the box body (4), flour containing impurities is placed in the second chamber (20), and the flour containing impurities enters the screening box (17) through the feeding through hole (2).

2. The positive and negative pressure reciprocating type fine flour screening device according to claim 1, wherein the power mechanism is one of a crank-slider mechanism and a power telescopic cylinder assembly.

3. The positive-negative pressure reaction type fine flour screening device according to claim 1, wherein the power mechanism comprises a rotating motor, a disc (11) is fixedly connected to a power output shaft of the rotating motor, a connecting rod (12) is eccentrically connected to the disc (11), one end, far away from the disc (11), of the connecting rod (12) is rotatably connected with one end, far away from the outer side of the box body (4), of a sundry material discharge pipe (21), the sundry material discharge pipe (21) is driven by the power mechanism to swing left and right around the supporting shaft (15), and the screening surface repeatedly impacts the inclined plane plate (23).

4. The positive-negative pressure reaction type fine flour screening device according to claim 1, wherein a one-way air inlet valve (24) is arranged at the position of the box body (4) in the first chamber (19), the flour outlet (7) is connected with a flour collecting box (10) through a pipeline, and the flour collecting box (10) is connected with an air suction pump (9) used for generating negative pressure inside the flour collecting box (10).

5. The positive-negative pressure reciprocating flour milling screening device as claimed in claim 3, wherein the sundries discharging pipe (21) is connected with a sundries collecting box (13) through a hose, the sundries collecting box (13) is communicated with the second chamber (20) through a flour pump (14), and the flour containing sundries in the sundries collecting box (13) is conveyed into the second chamber (20) through the flour pump (14).

6. The positive-negative pressure reciprocating type fine flour screening device according to claim 3, wherein a plurality of deflector rods (1) are fixedly connected to the first arc-shaped plate (3), the deflector rods (1) are positioned at the top of the screening box (17), and the deflector rods (1) and the feeding through holes (2) are arranged in a staggered mode.

7. A positive-negative pressure reaction type fine flour screening device according to claim 3, wherein a plurality of main coil springs (5) are fixedly connected in the screening box (17), and a plurality of branch springs (6) which are perpendicular to the main coil springs (5) are fixedly connected to the main coil springs (5).