CN211412776U

CN211412776U - Negative pressure stone removing screening structure and screening machine using same

Info

Publication number: CN211412776U
Application number: CN201922116368.5U
Authority: CN
Inventors: 张国红; 邢建平; 王健
Original assignee: Shijiazhuang Sanli Grain Machinery Co ltd
Current assignee: Shijiazhuang Sanli Grain Machinery Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-09-04
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a negative pressure stone removing screening structure and a screening machine using the structure, which comprises a screen box, a negative pressure fan housing and a feed inlet, wherein the screen box comprises a side wall plate, an upper layer screen sheet and a lower layer screen sheet, the lower layer screen sheet is a woven net or a fish scale screen, and a stone outlet corresponding to the lower layer screen sheet is arranged at the high side discharge end of the lower layer screen sheet; the utility model discloses set up the negative pressure fan housing above the sieve case, when the material carries out the classified screening in the sieve case, can get rid of the light miscellaneous in the grain under the effect of negative pressure fan housing, simultaneously because lower floor's sieve piece adopts mesh grid or fish scale sieve, under the vibration effect, the stone grain of adulteration upwards moves gradually and finally discharges from the stone outlet in the material, the in-process that makes the material sieve in the classified screening, not only can carry out the classified screening, can also get rid of light miscellaneous and the stone in the material, collect the classified screening, remove light miscellaneous, it is as an organic whole to remove the three function of stone, the structure of sieve separator has been simplified greatly, and the production cost is reduced.

Description

Negative pressure stone removing screening structure and screening machine using same

Technical Field

The utility model relates to a grain screening installation field specifically is a negative pressure removes sieve selection structure and uses sieve separator of this structure.

Background

The grading sieve of the existing grain screening equipment is in a structure with a plurality of simple sieve sheets, and then is matched with a vertical or bedroom air sieve to carry out winnowing operation, so that the effect of removing impurities such as light impurities, large impurities and the like in grains is realized. Such equipment need possess classifying screen and pneumatic separation's structure simultaneously just can realize the function of removing the impurity, and structural comparatively complicated, and to some small output or to removing the not so high grain screening work of impurity precision, adopt the sieve separator of above-mentioned complex construction comparatively extravagant.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a negative pressure that can carry out the selection by winnowing effect to the material when carrying out classified screening removes stone screening structure and uses the sieve separator of this structure is provided.

The utility model adopts the technical proposal that: the utility model provides a negative pressure goes stone screening structure, its includes sieve case, sets up in the top of sieve case and with the negative pressure fan housing of sieve incasement portion intercommunication and be used for the feed inlet of sieve incasement portion feeding.

Further, the sieve case includes the side bounding wall, sets up upper sieve piece and the lower floor sieve piece of setting below the upper sieve piece in the side bounding wall.

Further, the lower layer sieve sheet is a woven net or a fish scale sieve.

Furthermore, a small impurity outlet is arranged below the lower-layer sieve sheet, and a stone outlet corresponding to the small impurity outlet is arranged at the high-side material outlet end of the lower-layer sieve sheet.

Further, the feed inlet is arranged on the negative pressure air hood.

Furthermore, the sieve box is obliquely arranged, and a discharge hole communicated with the lower-layer sieve sheet is formed in the lower side end of the sieve box.

Further, the sieve case still includes the big miscellaneous export of upper strata that communicates with upper screen sheet, little miscellaneous export is located the one side that is close to sieve case eminence end.

A screening machine comprises a negative-pressure stone-removing screening structure and a specific weight platform which is arranged below a discharge port and corresponds to the discharge port.

Further, the discharge gate is from last to inclining to the inboard of sieve case gradually down.

Furthermore, a rotary screen is arranged between the discharge port and the specific gravity table, one end of the rotary screen corresponds to the discharge port, and the other end of the rotary screen corresponds to the specific gravity table.

Further, the material flows in the screen box in a direction opposite to the direction of flow on the rotary screen.

The utility model discloses an actively the effect does: the utility model discloses set up the negative pressure fan housing above the sieve case, when the material carries out the classified screening in the sieve case, can get rid of the light miscellaneous in the grain under the effect of negative pressure fan housing, simultaneously because lower floor's sieve piece adopts mesh grid or fish scale sieve, under the vibration effect, the stone grain of adulteration upwards moves gradually and finally discharges from the stone outlet in the material, be the in-process that the material was screened in the classified screening, not only can carry out the classified screening, can also get rid of light miscellaneous and the stone in the material, collect the classified screening, remove light miscellaneous, it is as an organic whole to remove the three function of stone, the structure of sieve separator has been simplified greatly, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

As shown in attached figures 1 and 2, the negative pressure stone removing and screening structure of the utility model comprises a screen box 3, a negative pressure air cover which is arranged above the screen box 3 and is communicated with the inside of the screen box 3, and a feed inlet 1 which is arranged on the negative pressure air cover 2 and is used for supplying materials to the inside of the screen box 3,

the sieve box 3 comprises side enclosing plates, an upper sieve sheet 5 arranged in the side enclosing plates and a lower sieve sheet 6 arranged below the upper sieve sheet 5, and a discharge hole 7 is formed in one end of each side enclosing plate. That is, the sieve box 3 has no bottom plate and no top plate, the top opening of the sieve box is directly communicated with the negative pressure fan cover 2, and the bottom plate is replaced by the lower layer sieve sheet 6. The upper layer sieve sheet 5 is a flat sieve and is used for removing large impurities in materials and is discharged from an upper layer large impurity outlet 8 communicated with the upper layer sieve sheet 5. The flat screen cannot ensure a dense air passing opening due to the manufacturing process, so that the generated negative pressure attraction force is limited to a certain extent, and the lower screen sheet 6 is a woven mesh or a fish scale screen, so that the flat screen has a good ventilation effect, and is convenient for the negative pressure air cover 2 to generate a large enough negative pressure attraction force, thereby discharging light impurities.

On the other hand, the stones with large volume and weight gradually move upwards in the vibration process of the sieve box 3 and are finally discharged from the stone outlet 9 and collected through the stone outlet receiving hopper 13, so that small impurities in grains can be removed, and part of stones in the grains are removed at the same time to realize the stone removing function.

The sieve box 3 is obliquely arranged, and the discharge port 7 is positioned at the lower side end of the sieve box 3 and communicated with the lower-layer sieve sheet 6. A small impurity outlet 12 for collecting small impurities under the screen is arranged below the lower screen sheet 6, and since there is no more or less small impurities to be screened out at the lower side end of the lower screen sheet 6, the small impurity outlet 12 is arranged below the lower screen sheet 6 and on the side close to the higher side end.

Will the utility model discloses on the sieve separator is used to negative pressure stone removal screening structure the utility model discloses in give two concrete embodiments.

Example 1

As shown in the attached figure 1, the screening machine of the utility model comprises a negative pressure stone removing screening structure and a specific gravity table 11 communicated with a discharge port 7 through a rotary screen 10. The rotary screen 10 has one end corresponding to the discharge port 7 and one end corresponding to the specific gravity table 11, and conveys the material discharged from the discharge port 7 to the specific gravity table 11, and the rotary screen vibrates.

In order to reduce the width of the whole machine and reduce the floor area of the whole machine, the rotary screen 10 is gradually inclined downwards from one end corresponding to the discharge port 7 to the middle part close to the screen box 3, namely the flowing direction of the materials on the rotary screen 10 is opposite to the flowing direction in the screen box 3, so that the screen box 3 and the weight table 11 can be arranged at the corresponding upper and lower positions as much as possible, and the floor area of the whole machine is effectively reduced.

Example 2

As shown in fig. 2, the structure of the present embodiment is substantially the same as that of embodiment 1, in the present embodiment, the structure of the rotary screen 10 is removed, and the rotary screen is replaced by an inclined discharge port 7, and the discharge port 7 is inclined from top to bottom gradually toward the inner side of the screen box 3, so that the material directly falls into the middle position of the specific gravity table 11, and the effect of reducing the width of the whole machine and reducing the floor area can also be achieved. The effect of the stoner can be achieved by adjusting the inclination angle of the sieve box 3.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A negative-pressure stone-removing screening structure is characterized by comprising a screen box (3), a negative-pressure air cover (2) and a feeding hole (1), wherein the negative-pressure air cover (2) is arranged above the screen box (3) and is communicated with the inside of the screen box (3);

the screen box (3) comprises side enclosing plates, upper screen sheets (5) arranged in the side enclosing plates and lower screen sheets (6) arranged below the upper screen sheets (5);

the lower layer sieve sheet (6) is a woven net or a fish scale sieve;

a small impurity outlet (12) is arranged below the lower layer sieve sheet (6), and a stone outlet (9) corresponding to the material outlet end on the high side of the lower layer sieve sheet (6) is arranged.

2. A negative pressure stone-removing screening arrangement according to claim 1, characterized in that the inlet opening (1) is arranged on a negative pressure hood (2).

3. The negative-pressure stone-removing screening structure as claimed in claim 1, wherein the screening box (3) is obliquely arranged, and a discharge port (7) communicated with the lower screening sheet (6) is arranged at the lower side end of the screening box (3).

4. The negative-pressure stone-removing screening structure as claimed in claim 1, wherein the screening box further comprises an upper large impurity outlet (8) communicated with the upper screen sheet (5), and the small impurity outlet (12) is positioned at one side close to the high end of the screening box (3).

5. A screening machine using a negative pressure stone-removing screening arrangement according to any one of claims 1-4, characterized in that it comprises a negative pressure stone-removing screening arrangement and a weighing table (11) arranged below and in correspondence with the discharge opening (7).

6. A screening machine according to claim 5, characterized in that the discharge opening (7) is inclined gradually from top to bottom towards the inside of the screen box (3).

7. A screening machine according to claim 5, characterized in that a revolving screen (10) is arranged between the discharge opening (7) and the weighing platform (11), one end of the revolving screen (10) corresponding to the discharge opening (7) and the other end corresponding to the weighing platform (11).

8. A screening machine according to claim 7, characterized in that the direction of flow of the material in the screen box (3) is opposite to the direction of flow on the rotary screen (10).