CN217993604U

CN217993604U - Screw extrusion dehydrator

Info

Publication number: CN217993604U
Application number: CN202221930684.1U
Authority: CN
Inventors: 张群峰; 张伟; 史庆稳
Original assignee: Shandong Qunfeng Heavy Industry Technology Co ltd
Current assignee: Shandong Qunfeng Heavy Industry Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-12-09
Anticipated expiration: 2032-07-25

Abstract

The utility model belongs to the technical field of dewatering equipment, specifically provide a screw extrusion hydroextractor, including a sieve section of thick bamboo, be equipped with the helical blade axle in the inner chamber of a sieve section of thick bamboo. The spiral blade shaft comprises a rotating shaft with a variable diameter and a blade which is sleeved outside the rotating shaft and is spiral, the rotating shaft comprises a first shaft section, a frustum section and a second shaft section which are sequentially arranged along the conveying direction, one end with a smaller diameter in the frustum section is connected with the first shaft section, the outer diameters of the first shaft section and the second shaft section are the same, and one end with a larger diameter in the frustum section is connected with the second shaft section, the outer diameters of the second shaft section and the second shaft section are the same; the first shaft section, the cone platform section and the second shaft sectionThe pitch of the blades is D in sequence ₁ 、D ₂ And D ₃ Wherein D is ₁ ＝D ₂ ＞D ₃ 。

Description

Screw extrusion dehydrator

Technical Field

The utility model belongs to the technical field of dewatering equipment, a screw extrusion hydroextractor is specifically provided.

Background

The screw extrusion dehydrator can be widely applied to dehydration operation before drying of high-humidity dreg materials.

Among the relevant technical scheme, have the spiral blade axle in the sieve section of thick bamboo of screw extrusion hydroextractor, the extrusion dehydration of material is realized gradually to the spiral blade axle in the in-process of screw transmission, and thick liquid flows out from a sieve section of thick bamboo. In order to improve the effect of the screw extrusion dehydration, the pitch of the screw blade is gradually reduced along the material advancing direction.

The inventor thinks that in the above related art, only the pitch change of the helical blade is considered, and the influence of the change of the outer diameter of the rotating shaft on the squeezing dewatering effect is not fully utilized; meanwhile, the helical blades with continuously changed pitches have higher processing difficulty.

In addition, the spiral blade realizes conveying and extrusion dewatering through the side surface, and the requirement on the structural strength of the material is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a screw extrusion hydroextractor to solve one of above-mentioned technical problem.

In order to solve the above problems in the prior art, one or more embodiments of the present invention provide a screw extrusion dehydrator, including a sieve cylinder, be equipped with the helical blade axle in the inner chamber of sieve cylinder. The spiral blade shaft comprises a rotating shaft with a variable diameter and a blade which is sleeved outside the rotating shaft and is spiral, the rotating shaft comprises a first shaft section, a frustum section and a second shaft section which are sequentially arranged along the conveying direction, one end with a smaller diameter in the frustum section is connected with the first shaft section, the outer diameters of the first shaft section and the second shaft section are the same, and one end with a larger diameter in the frustum section is connected with the second shaft section, the outer diameters of the second shaft section and the second shaft section are the same; the pitch of the blades at the first shaft section, the cone platform section and the second shaft section is D in sequence ₁ 、D ₂ And D ₃ In which D is ₁ ＝D ₂ ＞D ₃ 。

Further, the one end of pivot is the feed end, the outside cover of pivot is equipped with spiral helicine baffle, the pitch of baffle is followed the blade synchronous variation, the external diameter edge of baffle with the side of blade department towards the feed end is fixed, the internal diameter edge of baffle with the excircle side of pivot is fixed.

Further, the outer diameter of the baffle is smaller than that of the blade.

Further, the inclination angle of the blade is larger than that of the baffle.

Furthermore, a feed hopper is installed at one end of the screen cylinder, the feed end of the spiral blade shaft is inserted into the feed hopper, a discharge cylinder is installed at the other end of the screen cylinder, and the discharge end of the spiral blade shaft is communicated with the discharge cylinder; and a stop part is arranged at one end, close to the discharge barrel, in the inner cavity of the screen barrel, and can translate relative to the rotating shaft, so that the screen barrel and the discharge barrel are communicated or disconnected.

Furthermore, the lower part of the discharging barrel is provided with a door cover capable of being opened and closed.

Furthermore, the spiral blade driving device further comprises a power device, wherein the power device is connected with a transmission device, and the transmission device is connected with the spiral blade shaft to drive the spiral blade shaft to rotate.

Further, still include the urceolus, the urceolus cover is established the outside of sieve section of thick bamboo, the one end of urceolus with the feeder hopper is fixed, the other end with it is fixed to go out the feed cylinder.

Further, the stop piece comprises a conical sleeve sleeved outside the rotating shaft, and one end with a smaller diameter in the conical sleeve is arranged towards the feeding end of the spiral blade shaft.

Furthermore, the conical sleeve is connected with the linear driving piece, and the linear driving piece can pull the conical sleeve to move along the axis of the rotating shaft so as to realize the communication or disconnection between the inner cavity of the screen drum and the discharge drum.

The beneficial effects of one or more of the above technical schemes are as follows:

(1) A variable-diameter rotating shaft is adopted, and specifically comprises a first shaft section, a conical section and a second shaft section; the change of the outer diameter between the first shaft section and the second shaft section is stably excessive by the conical section, the effect that the outer diameter of the rotating shaft is sequentially increased is finally achieved, the change of the thread pitch of the blades can be matched, and the effect and the stability of the spiral extrusion dehydration are further improved.

(2) Adopts a first shaft section, a cone bench section,The pitch of the blades at the second shaft section is D in sequence ₁ 、D ₂ And D ₃ Wherein D is ₁ ＝D ₂ ＞D ₃ . The mode enables the conical section to only adjust the outer diameter of the rotating shaft, and compared with the first shaft section, the pitch of the blades is not adjusted, so that the probability that the material is blocked due to violent volume change at the conical section can be reduced. The pitch of the blade is a constant value inside the first shaft section, inside the frustum section and inside the second shaft section, and the processing difficulty can be reduced for the pitch of the blade along the axial continuous change of the rotating shaft.

(3) The spiral baffle plate is adopted, stress of the blade can be borne, the requirement on structural strength of the blade in a spiral blade shaft is lowered, and the probability that the blade is damaged due to overlarge stress is lowered.

Drawings

Some embodiments of the present application are described below with reference to the accompanying drawings, in which:

FIG. 1 is a sectional view of the whole structure in the embodiment of the present invention;

FIG. 2 is an isometric view of an overall structure in an embodiment of the invention;

fig. 3 is a schematic view of a partial structure of a helical blade shaft according to an embodiment of the present invention.

List of reference numerals: 1. a feed hopper; 2. a helical blade shaft; 3. an inner cavity; 4. a discharging barrel; 5. an odor outlet; 6. a power plant; 7. a transmission device; 8. a hydraulic cylinder; 9. a frame; 10. pulling a plate; 11. a screen drum; 11A, an outer cylinder; 11B, a pulp outlet; 12. a low-pressure region; 13. an overpressure area; 14. a middle pressure area; 201. A first shaft section; 202. a baffle plate; 203. a blade; 204. a frustum section; 205. a second shaft section.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only preferred embodiments of the present application, and do not mean that the present application can be implemented only by the preferred embodiments, which are merely for explaining the technical principles of the present application and are not intended to limit the scope of the present application. All other embodiments that can be derived by a person skilled in the art from the preferred embodiments provided herein without inventive step should still fall within the scope of protection of the present application.

It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" in the description of the present application are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

In order to solve the above problems, as shown in fig. 1 to 3, the present embodiment provides a screw extrusion dehydrator, which includes a screen cylinder 11, and a screw blade shaft 2 is disposed in an inner cavity of the screen cylinder 11. The spiral blade shaft 2 comprises a rotating shaft with variable diameter and a spiral blade 203 sleeved outside the rotating shaft.

The screw extrusion hydroextractor of selling on the market, under the condition that adopts sieve section of

thick bamboo

11 and 2 cooperations of spiral blade axle to use, spiral blade axle 2 can be along setting for the direction transported substance material under outside rotation driving piece's the drive, under the condition that helical blade 203 pitch diminishes gradually, combines the extrusion that sieve section of thick bamboo 11 diameters diminishes or stop part, realizes the effect of screw extrusion dehydration.

In order to improve the effect of screw extrusion dehydration, the following steps are generally adopted: the pitch of the spiral blade 203 is gradually decreased, the outer diameter of the rotary shaft is gradually increased, and the inner diameter of the screen cylinder 11 is gradually decreased. However, the pitch of the helical blade 203 gradually decreases along the axial direction, and the outer diameter of the rotating shaft gradually increases, which also causes the size of the central hole at the helical blade 203 to gradually decrease, which causes great difficulty in manufacturing and installing the helical blade 203.

In this embodiment, the rotating shaft includes a first shaft section 201, a frustum section 204, and a second shaft section 205 that are sequentially arranged along the conveying direction, the end with the smaller diameter in the frustum section 204 is connected with the first shaft section 201 and has the same outer diameter, and the end with the larger diameter in the frustum section 204 is connected with the second shaft section 205 and has the same outer diameter; a low pressure area 12 is formed at the first shaft section 201, an overpressure area 13 is formed at the frustum section 204, a middle pressure area 14 is formed at the second shaft section 205, and the pitch of the blades 203 at the low pressure area 12, the overpressure area 13 and the middle pressure area 14 is D in sequence ₁ 、D ₂ And D ₃ Wherein D is ₁ ＝D ₂ ＞D ₃ 。

That is, the outer diameter of the rotating shaft and the pitch of the blades 203 are changed in a three-stage manner, and the pitch does not change in the low-pressure region 12, the overpressure region 13 and the medium-pressure region 14, so that the manufacturing and installation difficulty of the blades 203 is reduced. In the low pressure region 12 and the intermediate pressure region 14, the outer diameter of the shaft is also fixed, and the transition effect is achieved by changing the outer diameter of the shaft only in the frustum section 204.

During the rotation of the screw blade shaft 2 for conveying the material, the blades 203 receive a reaction force at the time of pressing the material, and the reaction force tends to deform the blades 203 under pressure. When the material of the blade 203 is brittle, it is even easy to cause cracks or fractures in the blade 203. In order to solve the problem, in this embodiment, one end of the rotating shaft is a feeding end, a spiral baffle 202 is sleeved outside the rotating shaft, the pitch of the baffle 202 changes synchronously with the blades 203, the outer diameter edge of the baffle 202 is fixed to the side, facing the feeding end, of the blades 203, and the inner diameter edge of the baffle 202 is fixed to the outer circle side of the rotating shaft.

Specifically, the outer diameter of the baffle 202 is smaller than the outer diameter of the blade 203, and the inclination angle of the blade 203 is larger than the inclination angle of the baffle 202.

In this embodiment, feeder hopper 1 is installed to the one end of a sieve section of thick bamboo 11, the feed end of helical blade axle 2 inserts in the feeder hopper 1, go out feed cylinder 4 is installed to the other end of a sieve section of thick bamboo 11, the discharge end intercommunication of helical blade axle 2 go out feed cylinder 4.

In order to increase the effect of screw extrusion dehydration, a stop member is installed at one end of the inner cavity of the screen drum 11, which is close to the discharge drum 4, and the stop member can translate relative to the rotating shaft and realize the communication or disconnection between the screen drum 11 and the discharge drum 4.

When the stop part completely blocks one end of the screen cylinder 11, so that materials cannot enter the discharge cylinder 4 from the screen cylinder 11, the compression ratio of the materials reaching the stop part is large, and the extrusion dehydration effect of the materials at the position is good; can make the stop part move again after the material compression to a certain proportion for sieve section of thick bamboo 11 and play feed cylinder 4 intercommunication, the material input after will dehydrating goes out in the feed cylinder 4.

In other embodiments, the stopper may not completely block the screen cylinder 11, and an annular gap is formed between an outer ring of the stopper and an inner wall surface of the screen cylinder 11, and the extruded material sequentially enters the discharging cylinder 4 from the gap.

In this embodiment, a door cover that can be opened and closed is provided at the lower portion of the discharge tube 4. The door closure can be through articulated or the installation of activity such as buckle connection in the lower part of play feed cylinder 4, when row material is expected to needs, opens the door closure and makes 4 inner chambers of play feed cylinder and external environment intercommunication, and it can to accomplish row material.

The opening of the door cover can adopt an electric mode, and an electric lock is arranged at the door cover; and the locking can also be realized by manually opening and closing and utilizing parts such as a bolt or a lock catch and the like.

In the embodiment, the spiral blade driving device further comprises a power device 6, wherein the power device 6 is connected with a transmission device 7, and the transmission device 7 is connected with the spiral blade shaft 2 to drive the spiral blade shaft 2 to rotate.

The power device 6 here may be an electric motor or a hydraulic motor, and the transmission device 7 may be a gear set, or may be a belt transmission device 7 or a chain sprocket device, as long as the rotation of the power device 6 can be transmitted to the rotating shaft. For example: the power device 6 adopts a motor, an output shaft of the motor is coaxially fixed with the driving sprocket, one end of the rotating shaft penetrates out of the discharging barrel 4 and then is coaxially fixed with the driven sprocket, and the driving sprocket and the driven sprocket are connected through a chain. For another example, the power device 6 adopts a motor, a driving gear is sleeved at an output shaft of the motor, a driven gear is sleeved at the end part of the rotating shaft, and the driving gear is connected with the driven gear through a gear set.

In this embodiment, the device further comprises an outer cylinder 11A, the outer cylinder 11A is sleeved outside the screen cylinder 11, one end of the outer cylinder 11A is fixed to the feed hopper 1, and the other end of the outer cylinder 11A is fixed to the discharge cylinder 4. The lower part of the outer cylinder protrudes downwards to form a storage cavity of the pulp, and the lower end of the outer cylinder is provided with a pulp outlet 11B for periodically discharging the pulp in the storage cavity.

Specifically, feeder hopper 1 is the open structural style in upper end, and feeder hopper 1 holds the material of treating the dehydration from upper end department, then during helical blade axle 2's feed end inserted feeder hopper 1's inner chamber 2, through the rotation of blade 203, carries the material to ejection of compact section of thick bamboo 4 along the screw direction. In the process of conveying the materials, the pitch of the blades 203 is reduced, and the extrusion dehydration of the materials is realized by utilizing the blocking effect of the blocking piece. The upper end of the discharging barrel 4 is provided with a stink outlet 5 so as to discharge stink generated by storing materials in the discharging barrel 4 for a long time.

As shown in fig. 1, the side opening of the feeding hopper 1 is communicated with the feeding ends of the screen cylinder 11 and the outer cylinder 11A, a feeding port is formed at the side opening, and the feeding port is butted and fixed with the ports of the screen cylinder 11 and the outer cylinder 11A. The side opening of the discharge barrel 4 forms a discharge opening, and the discharge opening is in butt joint communication and fixation with the ports of the discharge ends of the screen barrel 11 and the outer barrel 11A.

In order to fix the outer cylinder 11A, the screen cylinder 11, the power device 6 and the like on the ground, in the embodiment, a frame 9 is provided, and the outer cylinder 11A, the transmission device 7, the power device 6 and the like are directly or indirectly supported and fixed through the frame 9.

In this embodiment, the stop member includes a conical sleeve sleeved outside the rotating shaft, and the end of the conical sleeve with the smaller diameter is arranged toward the feeding end of the helical blade shaft 2.

In other embodiments, the conical sleeve may be replaced by a disk which can translate along the axis of the rotating shaft, and when squeezing dewatering, the disk needs to extend into the screen cylinder 11 to disconnect the screen cylinder 11 from the discharging cylinder 4. When discharging barrel 4 with the material discharge after the dehydration, the disc moves to discharging barrel 4 along the axis of pivot, then discharging barrel 4 and sieve section of thick bamboo 11 intercommunication, and spiral blade axle 2 continues the certain angle of rotation for the material that the dehydration satisfies the requirement gets into discharging barrel 4.

In this embodiment, the conical sleeve is connected with the linear driving element, and the linear driving element can pull the conical sleeve to move along the axis of the rotating shaft, so as to realize the connection or disconnection between the inner cavity of the screen drum 11 and the discharge drum 4.

As shown in fig. 1, the linear drive uses a hydraulic cylinder 8, which may alternatively be replaced by an air cylinder or an electric push rod. The cylinder body of the hydraulic cylinder 8 is inserted into the wall surface of the discharge cylinder 4, the piston rod of the hydraulic cylinder 8 penetrates into the inner cavity of the discharge cylinder 4, the end face of the large end of the taper sleeve is fixedly provided with a pull plate 10, and the pull plate 10 is connected with the piston rod.

The working principle is as follows:

when the device is used, the hydraulic cylinder 8 can be utilized to push the pulling plate 10, so that the conical sleeve seals one end of the screen cylinder 11 for discharging.

The material to be dehydrated is fed to the feed hopper 1 manually or by means of external feeding equipment;

the power device 6 is started, the power device 6 drives the spiral blade shaft 2 to rotate through the transmission device 7, and the feeding end of the spiral blade shaft 2 introduces materials from the feeding hopper 1 and transfers the materials to the screen drum 11 along the conveying direction.

The material is dehydrated under a certain pressure in the low pressure area 12, when the material moves to the overpressure area 13, the outer diameter of the rotating shaft is gradually increased, the pressure applied to the material is gradually increased, and the material enters the middle pressure area 14 after the material is dehydrated to a certain degree in the overpressure area 13.

After the material enters the intermediate pressure zone 14, the pitch between the blades 203 becomes smaller, and the pressure borne by the material is further increased to complete further dewatering.

When the material reaches the vicinity of the stop, the stop of the stop and the conveyance of the screw blade shaft 2 cause the material to be subjected to heavy pressure there, and dewatering is performed.

After the material dehydration is accomplished, the push pedal is pulled to pneumatic cylinder 8 for sieve section of thick bamboo 11 and play feed cylinder 4 intercommunication, helical blade axle 2 continue to rotate in order to discharge the material after the dehydration into out feed cylinder 4.

When the dehydrated materials in the discharging barrel 4 are full, the door cover is opened to discharge the materials.

So far, the technical solutions of the present application have been described in connection with the foregoing preferred embodiments, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to the above preferred embodiments. The technical solutions in the above preferred embodiments can be split and combined, and equivalent changes or substitutions can be made on related technical features by those skilled in the art without departing from the technical principles of the present application, and any changes, equivalents, improvements, etc. made within the technical concept and/or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A screw extrusion dehydrator, comprising:

a screen cylinder;

the spiral blade shaft is arranged in the inner cavity of the screen drum;

the spiral blade shaft comprises a rotating shaft with variable diameter and a blade which is sleeved outside the rotating shaft and is spiral, the rotating shaft comprises a first shaft section, a frustum section and a second shaft section which are sequentially arranged along the conveying direction, one end with smaller diameter in the frustum section is connected with the first shaft section, the outer diameters of the first shaft section and the second shaft section are the same, and one end with larger diameter in the frustum section is connected with the second shaft section, the outer diameters of the second shaft section and the second shaft section are the same;

the pitch of the blades at the first shaft section, the cone platform section and the second shaft section is D in sequence ₁ 、D ₂ And D ₃ Wherein D is ₁ ＝D ₂ ＞D ₃ 。

2. The screw extrusion dehydrator of claim 1, wherein one end of the rotating shaft is a feeding end, a spiral baffle is sleeved outside the rotating shaft, the pitch of the baffle is changed along with the blades synchronously, the outer diameter edge of the baffle is fixed with the side of the blades facing the feeding end, and the inner diameter edge of the baffle is fixed with the outer circle side of the rotating shaft.

3. The screw extruder-extractor of claim 2 wherein said baffle has an outer diameter less than an outer diameter of said blades.

4. The screw extruder-extractor of claim 2 wherein the angle of inclination of said blades is greater than the angle of inclination of said baffles.

5. The screw extrusion dehydrator of claim 1, wherein a feed hopper is installed at one end of the screen drum, and a discharge drum is installed at the other end of the screen drum;

and a stop part is arranged at one end, close to the discharge barrel, in the inner cavity of the screen barrel, and can translate relative to the rotating shaft, so that the screen barrel and the discharge barrel are communicated or disconnected.

6. The screw extrusion dehydrator according to claim 5, wherein a door cover is provided at a lower portion of the discharging drum to be openable and closable.

7. The screw extrusion dehydrator of claim 1, further comprising a power plant for driving rotation of the screw blade shaft.

8. The screw extrusion dehydrator of claim 5, further comprising an outer cylinder sleeved outside the screen cylinder, wherein one end of the outer cylinder is fixed with the feed hopper, and the other end of the outer cylinder is fixed with the discharge cylinder.

9. The screw extrusion dehydrator of claim 5, wherein the stop member comprises a tapered sleeve disposed around the outside of the rotating shaft, wherein the smaller diameter end of the tapered sleeve is disposed towards the feed end of the screw blade shaft.

10. The screw extrusion dehydrator of claim 9, wherein the tapered sleeve is connected to a linear drive that pulls the tapered sleeve along the axis of the spindle.