CN213740315U - Double-screw pulp extruder with pre-extrusion function - Google Patents
Double-screw pulp extruder with pre-extrusion function Download PDFInfo
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- CN213740315U CN213740315U CN202022351714.0U CN202022351714U CN213740315U CN 213740315 U CN213740315 U CN 213740315U CN 202022351714 U CN202022351714 U CN 202022351714U CN 213740315 U CN213740315 U CN 213740315U
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Abstract
The utility model discloses a twin-screw extruder with pre-extrusion function, which comprises a feed inlet arranged at the top of a casing of the twin-screw extruder, wherein the feed inlet is connected with a feed hopper, the feed hopper is formed by coaxially butting a cylindrical bucket body at the lower part and an inverted cone-shaped bucket body with a big top and a small bottom at the upper part, and a plurality of cutter bars are respectively arranged and arranged in the circumferential direction of the inner walls of the cylindrical bucket body and the inverted cone-shaped bucket body; the axis position of the feed hopper is provided with a spiral shaft, the spiral shaft is provided with a spiral sheet with the diameter gradually reduced from top to bottom, and the outer diameter of the spiral sheet and the cutter bar are always kept at equal intervals. The utility model discloses a reducing spiral and feeder hopper cooperation make loose wood chip before getting into the twin-screw pulp extruder, compressed tightly the compaction, avoided because of the wood chip not by the unstable play thick liquid concentration that leads to of complete compression in the twin-screw pulp extruder.
Description
Technical Field
The utility model relates to a papermaking equipment technical field, concretely relates to rely on double screw rotation to carry out thick liquids and rub and grind the equipment of separating.
Background
In the domestic paper making industry, the straw, reed, cotton stalk, poplar and other biological raw materials are still used for pulping and paper making in a large proportion. In the pulping process using such raw materials, the raw materials are often treated by mechanical or chemical methods. In recent years, the pulping process combining the two processes is gradually popularized, and compared with pure chemical pulping, the pulping process has the advantages that the pollution amount is smaller, and meanwhile, the energy consumption is saved.
In the chemical mechanical pulp preparation process, a press master is a core device, and the press master at the present stage is mainly divided into a disc press master and a screw press master. Among them, the disc press has an earlier origin and a wider application, but during the refining process, the disc press has a larger transverse cutting effect on fibers, which can cause the fibers to be broken along the length direction, and the quality of the finished pulp is influenced.
The screw press starts later, the earliest screw press is of a single-screw structure, and grinding is carried out by means of mutual friction between a spiral sheet and a grinding shell. After the 90 s of the last century, twin-screw structures were slowly evolved. The main structure of the press master is two screws rotating in the same direction and meshed with each other. The fibers are axially broken under the action of the extrusion force generated by the screw in the rotating process, so that the permeation of liquid medicine and the separation of the fibers are facilitated.
Because the twin-screw extruder is mostly used for processing wood chips, gaps among the wood chips are large in a natural state, so that when raw materials enter the twin-screw extruder, the wood chips among the spiral sheets cannot be pressed and completely compressed, the concentration of pulp forming materials of the twin-screw extruder is uneven, and the production requirements cannot be met.
Utility model patent publication No. CN207210819U discloses a twin-screw press and have its paper pulp production line. The double-screw extruder comprises a shell, a first screw shaft and a second screw shaft, wherein the first screw shaft and the second screw shaft are arranged in an inner cavity of the shell, the first screw shaft comprises a first shaft core and a first screw blade arranged on the first shaft core, the second screw shaft comprises a second shaft core and a second screw blade arranged on the second shaft core, the first screw blade and the second screw blade are mutually meshed, a notch structure is arranged on the radial outer edge of at least one of the first screw blade and the second screw blade, and the notch structure penetrates through the thickness of the corresponding screw blade. The utility model discloses a twin-screw press master can effectively eliminate the problem that thick liquids were dried the sclerosis by the crowded through set up the opening structure on the helical blade, and then can prevent that the press master from being blocked dead phenomenon.
The utility model provides a bulletin number CN 204738171U's utility model provides a high-efficient double helix pulp extruder, including the frame of taking the cavity, locate the extrusion storehouse that forms after upper and lower screen frame is connected on frame cavity upper portion, the cavity that is located extrusion storehouse below is the liquid collection storehouse, the feed inlet is established to the one end in extrusion storehouse, the discharge gate is established to the other end, is equipped with two by power machine driven take helical blade's propulsion screw rod in the extrusion storehouse, and propulsion screw rod comprises the constant diameter straight section of feed section and the conic section and the straight section of compression section, and the pitch of the helical blade who impels on the screw rod reduces from the feed section to the compression section gradually, and the helical blade outer fringe interval on its characterized in that compression section is provided with the breach. The material is extruded in the extrusion rear section in the modes of extrusion, relaxation, re-extrusion and re-looseness prevention, so that the formation of hard shells of external materials is effectively prevented, extruded slurry is smoothly discharged, and the dryness of the material after the slurry extrusion is effectively improved. Meanwhile, the lower net rack of the extrusion bin and the internal components thereof can be cleaned and maintained, and the cleaning dead angle is eliminated.
The utility model discloses a notice number CN 2382744Y's utility model discloses a can accomplish thick liquids concentration, thick liquids washing or black liquor extraction's corotation twin-screw extruder in papermaking, this extruder is including power transmission mechanism, the main shaft of the work, the epaxial thick liquids of work impels auger, conjugated rotor and has the compression dehydration screw rod of a certain compression ratio, and pan feeding mouth, discharge gate, discharge port etc. constitute, this technical scheme's key feature is that the epaxial conjugated rotor of work is tangent cooperation with the casing inner wall, form thick liquids along the axial propulsive sealed spiral runner at this work section position. The press has high working efficiency and good reliability, and has the advantages of water saving and electricity saving, and is used for treating wheat straw pulp.
Although the proposal of the publication improves the technology of the twin-screw extruder, the proposal still does not solve the defects of the twin-screw extruder that the feeding is not uniform and the concentration of the finished pulp is not uniform.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve the weak point among the prior art, provide a twin-screw extruder with extrude function in advance.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a double-screw extruder with a pre-extrusion function comprises a feed inlet arranged at the top of a shell of the double-screw extruder, wherein the feed inlet is connected with a feed hopper, the feed hopper is formed by coaxially butting a cylindrical bucket body at the lower part and an inverted cone bucket body with a large upper part and a small lower part at the upper part, and a plurality of cutter bars are respectively arranged in the circumferential direction of the inner walls of the cylindrical bucket body and the inverted cone bucket body; the axis position of the feed hopper is provided with a spiral shaft, the spiral shaft is provided with a spiral sheet with the diameter gradually reduced from top to bottom, and the outer diameter of the spiral sheet and the cutter bar are always kept at equal intervals.
The cutter bars are arranged on the inner walls of the cylindrical bucket body and the inverted cone-shaped bucket body in an axially extending mode.
The upper end of the spiral shaft is fixed on the upper edge of the feed hopper through a transmission device.
The feed hopper is connected with a feed inlet of the shell of the double-screw extruder through a connecting flange.
One side of the inverted cone-shaped hopper body of the feeding hopper is provided with a slide carriage with a large inclination angle.
The utility model has the advantages that:
the utility model discloses a reducing spiral and feeder hopper cooperation, when feeding mechanism was delivered to the wood chip of loose state, to the twin-screw motion of twin-screw extruder under the drive of screw axis, because the space between screw axis and the feed inlet constantly dwindles at the motion in-process, consequently wood chip wherein is constantly extruded, until clearance wherein disappears, make loose wood chip before getting into the twin-screw extruder, by the compaction that compresses tightly, avoided because of the wood chip not by the complete compression in the twin-screw extruder and the play thick liquid concentration that leads to unstable.
Drawings
FIG. 1 is a schematic structural view of the present invention; .
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in FIG. 1, the embodiment discloses a twin-screw extruder with pre-extrusion function, which comprises a feed inlet 10 arranged at the top of the casing of the twin-screw extruder, wherein the feed inlet is connected with a feed hopper through a connecting flange 8. The feeder hopper is formed by the coaxial butt joint of cylindric bucket body 7 of lower part and the big-end-up's of upper portion back taper bucket body 1 (the tip diameter of back taper bucket body 1 is unanimous with the diameter of cylindric bucket body 7), evenly arranges respectively in the inner wall circumferencial direction of cylindric bucket body 7 and back taper bucket body and is provided with a plurality of sword strip 6 and sword strip 2. Each blade is arranged on the inner walls of the cylindrical bucket body 7 and the inverted cone-shaped bucket body 1 in an axially extending mode.
The axis position of the feed hopper is provided with a screw shaft 4, the screw shaft 4 is provided with a spiral sheet 5 with the diameter gradually reduced from top to bottom, and the clearance of 5mm is always kept between the outer diameter of the spiral sheet 5 and the blades 2 and 6.
In this embodiment, the top of the screw shaft 4 is fixed to the upper edge of the hopper through a transmission 11. A shaft head 12 extending from the upper end of the transmission 11 is coupled to a motor, thereby rotating the screw shaft 4.
In this embodiment, the feeding hopper is provided with a slide carriage 3 with a large inclination angle at one side of the inverted cone-shaped hopper body 1, so that the wood chips can quickly slide to the position of the spiral piece.
The working principle of the utility model is as follows: the helical blade 5 drives the wood chips to move downwards in the rotating process of the helical shaft 4, the gap between the wood chips and the inverted cone-shaped bucket body 1 is continuously reduced, and at the moment, the originally loose wood chips are preliminarily compacted and compacted. Meanwhile, under the action of the knife strips 2 and 6, the wood chips which are overlapped together are separated, and the wood chips which are clamped in the gap between the spiral piece 5 and the shell are cut off.
The utility model discloses a reducing spiral and feeder hopper cooperation, when feeding mechanism was delivered to the wood chip of loose state, to the twin-screw motion of twin-screw extruder under the drive of screw axis, because the space between screw axis and the feed inlet constantly dwindles at the motion in-process, consequently wood chip wherein is constantly extruded, until clearance wherein disappears, make loose wood chip before getting into the twin-screw extruder, by the compaction that compresses tightly, avoided because of the wood chip not by the complete compression in the twin-screw extruder and the play thick liquid concentration that leads to unstable.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
In the description of the present invention, it should be understood that the terms "front", "back", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the description refers must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
Claims (5)
1. The utility model provides a double screw extruder with extrude function in advance, is connected with feeder hopper, its characterized in that including the feed inlet of locating double screw extruder casing top: the feeding hopper is formed by coaxially butting a cylindrical hopper body at the lower part and an inverted cone-shaped hopper body with a large upper part and a small lower part at the upper part, and a plurality of cutter bars are respectively arranged in the circumferential direction of the inner walls of the cylindrical hopper body and the inverted cone-shaped hopper body; the axis position of the feed hopper is provided with a spiral shaft, the spiral shaft is provided with a spiral sheet with the diameter gradually reduced from top to bottom, and the outer diameter of the spiral sheet and the cutter bar are always kept at equal intervals.
2. The twin-screw press with pre-extrusion function as recited in claim 1, wherein: the cutter bars are arranged on the inner walls of the cylindrical bucket body and the inverted cone-shaped bucket body in an axially extending mode.
3. The twin-screw press with pre-extrusion function as recited in claim 1, wherein: the upper end of the spiral shaft is fixed on the upper edge of the feed hopper through a transmission device.
4. The twin-screw press with pre-extrusion function as recited in claim 1, wherein: the feed hopper is connected with a feed inlet of the shell of the double-screw extruder through a connecting flange.
5. The twin-screw press with pre-extrusion function as claimed in any one of claims 1 to 4, wherein: one side of the inverted cone-shaped hopper body of the feeding hopper is provided with a slide carriage with a large inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022351714.0U CN213740315U (en) | 2020-10-21 | 2020-10-21 | Double-screw pulp extruder with pre-extrusion function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022351714.0U CN213740315U (en) | 2020-10-21 | 2020-10-21 | Double-screw pulp extruder with pre-extrusion function |
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| CN213740315U true CN213740315U (en) | 2021-07-20 |
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| CN202022351714.0U Active CN213740315U (en) | 2020-10-21 | 2020-10-21 | Double-screw pulp extruder with pre-extrusion function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863040A (en) * | 2021-09-17 | 2021-12-31 | 安徽雨鑫木业有限公司 | Automatic feeding device of defibrator |
-
2020
- 2020-10-21 CN CN202022351714.0U patent/CN213740315U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863040A (en) * | 2021-09-17 | 2021-12-31 | 安徽雨鑫木业有限公司 | Automatic feeding device of defibrator |
| CN113863040B (en) * | 2021-09-17 | 2023-07-21 | 安徽雨鑫木业有限公司 | Automatic feeding device of thermal mill |
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