阅读说明：本技术 液层界面可调节的卧螺离心机 (Horizontal screw centrifuge with adjustable liquid-layer interface ) 是由 汪建国 于 2020-04-14 设计创作，主要内容包括：本专利涉及离心机。液层界面可调节的卧螺离心机,包括卧螺离心机主体,卧螺离心机主体包括转鼓、位于转鼓内的螺旋送料器,转鼓由直段转鼓和锥段转鼓组成,螺旋送料器上设有向心泵,向心泵的进料口与转鼓的内腔联通,向心泵通过传动管道连接清液出口,清液出口也位于大端主轴承远离转鼓一侧；向心泵通过转轴可转动连接螺旋送料器,大端主轴承远离转鼓一侧设有调节手柄,调节手柄通过传动机构连接转轴。使用者可通过调节手柄调整转轴的角度来调整向心泵的进料口的高度,根据不同的需要设置不同的固液分离程度。(This patent relates to centrifuges. The horizontal screw centrifuge with the adjustable liquid layer interface comprises a horizontal screw centrifuge main body, wherein the horizontal screw centrifuge main body comprises a rotary drum and a spiral feeder positioned in the rotary drum, the rotary drum consists of a straight rotary drum and a conical rotary drum, a centripetal pump is arranged on the spiral feeder, a feed inlet of the centripetal pump is communicated with an inner cavity of the rotary drum, the centripetal pump is connected with a clear liquid outlet through a transmission pipeline, and the clear liquid outlet is also positioned on one side, away from the rotary drum, of a large-end main bearing; the centripetal pump is rotatably connected with the spiral feeder through a rotating shaft, one side, far away from the rotary drum, of the large-end main bearing is provided with an adjusting handle, and the adjusting handle is connected with the rotating shaft through a transmission mechanism. The user accessible adjustment handle adjusts the angle of pivot and adjusts the height of the feed inlet of centripetal pump, sets up different solid-liquid separation degree according to the needs of difference.)

1. The horizontal screw centrifuge with the adjustable liquid-layer interface comprises a horizontal screw centrifuge body, wherein the horizontal screw centrifuge body comprises a rotary drum and a screw feeder positioned in the rotary drum, and is characterized in that the rotary drum consists of a straight rotary drum and a conical rotary drum, and the screw feeder consists of a first sub screw feeder positioned in the straight rotary drum and a second sub screw feeder positioned in the conical rotary drum;

the first sub-spiral feeder and the second sub-spiral feeder are internally provided with feeding channels which are communicated with each other, the side wall of the first sub-spiral feeder is provided with an opening which enables the feeding channels to be communicated with the inner cavity of the straight section rotary drum, the opening is close to the small end of the straight section rotary drum, the side wall of the conical section rotary drum is provided with a solid phase outlet, and the solid phase outlet is close to the small end of the conical section rotary drum;

two ends of the rotary drum are respectively provided with a set of bearing, the bearing positioned on the small end side of the straight rotary drum is used as a small end main bearing, the bearing positioned on the small end side of the conical rotary drum is used as a large end main bearing, the feeding channel extends towards the large end main bearing and penetrates through the large end main bearing, and an opening of the feeding channel positioned on one side of the large end main bearing, which is far away from the rotary drum, is used as a feeding hole;

the spiral feeder is provided with a centripetal pump, the centripetal pump is positioned at the large end of the straight-section rotary drum, a feed inlet of the centripetal pump is communicated with an inner cavity of the rotary drum, the centripetal pump is connected with a clear liquid outlet through a transmission pipeline, and the clear liquid outlet is also positioned at one side, away from the rotary drum, of the large-end main bearing;

the centrifugal pump is rotatably connected with the spiral feeder through a rotating shaft, one side, far away from the rotary drum, of the large-end main bearing is provided with an adjusting handle, and the adjusting handle is connected with the rotating shaft through a transmission mechanism.

2. The horizontal decanter centrifuge of claim 1, wherein the straight-section bowl and the conical-section bowl are both conical, the cone angle of the straight-section bowl is 5 ° to 8 °, the cone angle of the conical-section bowl is 35 ° to 45 °, and the large end of the straight-section bowl is connected to the large end of the conical-section bowl.

3. The horizontal screw centrifuge with the adjustable liquid-layer interface of claim 2, wherein the screw angle of the screw blade of the first sub screw feeder is 5 ° to 8 °, and the screw angle of the screw blade of the second sub screw feeder is 35 ° to 45 °.

4. A horizontal screw centrifuge with adjustable liquid-layer interface as claimed in claim 3, wherein the screw angle of the screw blade of the first sub screw feeder is equal to the cone angle of the straight-segment drum, and the screw angle of the screw blade of the second sub screw feeder is equal to the cone angle of the conical-segment drum.

5. The decanter centrifuge of claim 1, wherein a groove with an inward opening is formed at the junction of the straight drum and the conical drum, and an annular baffle is disposed in the groove.

6. A horizontal decanter centrifuge as claimed in claim 5, wherein said annular baffle is a circular annular baffle.

7. A horizontal decanter centrifuge as claimed in claim 5 wherein said annular baffle is one-sixth to one-third annular.

8. The decanter centrifuge of claim 7, wherein the opening of said recess is provided with a stopper for preventing the annular baffle from falling out.

9. A horizontal decanter centrifuge as defined in claim 7 having an adjustable liquid-layer interface, wherein the center of said annular baffle and the center of said solid phase outlet are located on the same side of the bowl.

10. The decanter centrifuge of claim 9, wherein a line between the center of said annular baffle and the center of said solid phase outlet is in the same plane as the central axis of said second sub-screw feeder.

Technical Field

The invention relates to the field of machinery, in particular to a centrifugal machine.

Background

When the existing centrifugal machine is used for adjusting a liquid layer interface, the centrifugal machine is stopped firstly, a machine cover is opened, and screws are disassembled to adjust.

Disclosure of Invention

The invention aims to provide a horizontal screw centrifuge with an adjustable liquid layer interface, which aims to solve the technical problem.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

the horizontal screw centrifuge with the adjustable liquid-layer interface comprises a horizontal screw centrifuge body, wherein the horizontal screw centrifuge body comprises a rotary drum and a screw feeder positioned in the rotary drum, and is characterized in that the rotary drum consists of a straight rotary drum and a conical rotary drum, and the screw feeder consists of a first sub screw feeder positioned in the straight rotary drum and a second sub screw feeder positioned in the conical rotary drum;

the first sub-spiral feeder and the second sub-spiral feeder are internally provided with feeding channels which are communicated with each other, the side wall of the first sub-spiral feeder is provided with an opening which enables the feeding channels to be communicated with the inner cavity of the straight section rotary drum, the opening is close to the small end of the straight section rotary drum, the side wall of the conical section rotary drum is provided with a solid phase outlet, and the solid phase outlet is close to the small end of the conical section rotary drum;

two ends of the rotary drum are respectively provided with a set of bearing, the bearing positioned on the small end side of the straight rotary drum is used as a small end main bearing, the bearing positioned on the small end side of the conical rotary drum is used as a large end main bearing, the feeding channel extends towards the large end main bearing and penetrates through the large end main bearing, and an opening of the feeding channel positioned on one side of the large end main bearing, which is far away from the rotary drum, is used as a feeding hole;

the spiral feeder is provided with a centripetal pump, the centripetal pump is positioned at the large end of the straight-section rotary drum, a feed inlet of the centripetal pump is communicated with an inner cavity of the rotary drum, the centripetal pump is connected with a clear liquid outlet through a transmission pipeline, and the clear liquid outlet is also positioned at one side, away from the rotary drum, of the large-end main bearing;

the centrifugal pump is rotatably connected with the spiral feeder through a rotating shaft, one side, far away from the rotary drum, of the large-end main bearing is provided with an adjusting handle, and the adjusting handle is connected with the rotating shaft through a transmission mechanism.

Firstly, the height of the feed inlet of the centripetal pump is adjusted by adjusting the angle of the rotating shaft through the adjusting handle, so that the liquid layer interface is adjusted, the clear liquid positioned on the inner side of the liquid layer interface is sucked out, the clear liquid positioned on the outer side of the liquid layer interface flows in the rotary drum, and different solid-liquid separation degrees are set according to different requirements. The method can realize the adjustment of the liquid layer interface under the condition of no shutdown, and solves the problems in the prior art. Secondly, the materials of the patent firstly move from the small end of the conical section rotary drum to the small end of the straight section rotary drum in the feeding channel, enter the inner cavity of the rotary drum after reaching the small end of the straight section rotary drum, and move from the small end of the straight section rotary drum to the small end of the conical section rotary drum. Thereby realizing the parallel flow type layout, having longer material flow and enough retention time to realize the thorough solid-liquid separation.

Preferably, the straight section rotary drum and the conical section rotary drum are both conical, the cone angle of the straight section rotary drum is 5-8 degrees, the cone angle of the conical section rotary drum is 35-45 degrees, and the big end of the straight section rotary drum is connected with the big end of the conical section rotary drum; the spiral angle of the spiral blade of the first sub-spiral feeder is 5-8 degrees, and the spiral angle of the spiral blade of the second sub-spiral feeder is 35-45 degrees.

This patent has been selected the form of rotary drum, screw feeder's helical blade's spiral angle to make the material in the process of marcing in the straight section rotary drum, liquid layer depth (fluid interface to the degree of depth of rotary drum inner wall) deepens gradually, the separation factor that the solid matter received in the material simultaneously (Fr ═ omega-²R/g, radius R gradually increasing) becomes progressively larger, so the supernatant at the large end of the straight-section drum is cleaner and the sediments are denser. When the sediment enters the conical section rotary drum from the straight section rotary drum, the section of the conical section rotary drum is gradually reduced, so that the sediment can be compressed, extrusion force is generated on the sediment, the extrusion force is provided by the resultant force formed by the thrust of the helical blades and the static pressure of fluid, the sediment with lower water (liquid) content is discharged from the solid phase outlet, and the process requirement is met. Furthermore, the conical configuration allows the drum to be of a shorter length, whereby the overall length of the drum is shorter and the rigidity and stability are easier to ensure.

The junction of the straight section rotary drum and the conical section rotary drum is provided with a groove with an inward opening, and an annular baffle is arranged in the groove. When the sediments enter the conical section rotary drum from the straight section rotary drum, the sediments need to pass through the annular baffle plate, the section of the annular baffle plate is greatly reduced, so the sediments are necessarily further compressed, the extrusion force is provided by the resultant force formed by the thrust of the helical blades and the static pressure of the fluid, and the sediments with lower water (liquid) content are discharged from the solid phase outlet, so that the process requirements are met.

The annular baffle can be a circular annular baffle or a one-sixth to one-third circular annular baffle. When the annular baffle which is one sixth to one third circular ring is adopted, the center of the annular baffle and the center of the solid phase outlet are positioned at the same side of the rotary drum.

Further preferably, a line connecting the center of the annular baffle and the center of the solid phase outlet is on the same plane as the central axis of the second sub-screw feeder.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a partial cross-sectional structural view of the junction of a straight drum and a conical drum;

FIG. 3 is a cross-sectional view of a centrifugal pump and its drive mechanism;

FIG. 4 is a partial structural schematic view at the centrifugal pump;

fig. 5 is a partial structural diagram of the opening.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific drawings.

Referring to fig. 1, 2, 3, 4 and 5, the horizontal screw centrifuge with adjustable liquid layer interface comprises a horizontal screw centrifuge body, wherein the horizontal screw centrifuge body comprises a rotary drum and a screw feeder positioned in the rotary drum.

Relating to rotary drums

The rotary drum is composed of a straight section rotary drum 2 and a conical section rotary drum 3. Preferably, the straight section rotary drum 2 and the conical section rotary drum 3 are both conical, the cone angle of the straight section rotary drum 2 is 5-8 degrees, the cone angle of the conical section rotary drum 3 is 35-45 degrees, and the big end of the straight section rotary drum 2 is connected with the big end of the conical section rotary drum 3. The side wall of the conical section rotary drum 3 is provided with a solid phase outlet which is close to the small end of the conical section rotary drum 3. The juncture of the straight rotary drum 2 and the conical rotary drum 3 is provided with a groove with an inward opening, and an annular baffle 9 is arranged in the groove. When the sediment enters the conical section rotary drum 3 from the straight section rotary drum 2, the sediment needs to pass through the annular baffle plate, the section of the annular baffle plate 9 is greatly reduced, so that the sediment is necessarily further compressed, and the extrusion force is provided by the resultant force formed by the thrust of the helical blades and the static pressure of the fluid, so that the sediment with lower water (liquid) content is discharged from the solid phase outlet, and the process requirement is met. The annular baffle 9 may be a circular annular baffle, or a one-sixth to one-third circular annular baffle. When the annular baffle which is in a ring shape of one sixth to one third is adopted, the center of the annular baffle and the center of the solid phase outlet are positioned at the same side of the rotary drum. Preferably, a line connecting the center of the annular baffle and the center of the solid phase outlet is on the same plane with the central axis of the second sub-screw feeder. A stop head for preventing the annular baffle from coming off can be arranged at the opening of the groove. This may be practically eliminated because the annular baffle is compressed in the groove due to centrifugal forces. If the structure of one sixth to one third of circular ring shape is adopted, one is better, the condition that the annular baffle is just above when the machine is stopped due to accidents is avoided, and the annular baffle can fall down under the action of gravity when the annular baffle is just above. The retaining heads can be arranged at equal intervals, and the distance between every two adjacent retaining heads is less than one third of the length of the annular baffle.

Screw feeder

The screw feeders consist of a first sub-screw feeder located in the straight drum 2 and a second sub-screw feeder located in the conical drum 3. The spiral angle of the spiral blade of the first sub-spiral feeder is 5-8 degrees, and the spiral angle of the spiral blade 10 of the second sub-spiral feeder is 35-45 degrees. Preferably, the spiral angle of the spiral blade of the first sub-screw feeder is equal to the cone angle of the straight rotary drum, and the spiral angle of the spiral blade of the second sub-screw feeder is equal to the cone angle of the conical rotary drum. The first sub-spiral feeder and the second sub-spiral feeder are internally provided with feeding channels which are communicated with each other, the side wall of the first sub-spiral feeder is provided with an opening which enables the feeding channels to be communicated with the inner cavity of the straight section rotary drum 2, and the opening is close to the small end of the straight section rotary drum 2. The opening is preferably circular. The opening is fixed with a driving fin 11. The driving fin 11 may be annular and located radially of the first sub screw feeder, and a plurality of circular arc-shaped bar-shaped protrusions extending from the outer side of the driving fin on the inner side of the driving fin are provided on the driving fin, and the bar-shaped protrusions are arranged at equal intervals and have the same shape. The driving fin 11 may be formed of at least three sub-blades, and the sub-blades may be arranged in a ring shape at equal intervals outside the opening with the rotation center axis of the first sub-screw feeder as the center. The outer side surface of each sub-blade is provided with a curve which extends from one angle of the inner side of the sub-blade to the outer side of the sub-blade and the opposite angle of the inner side of the sub-blade; the curve divides the circular arc board into the first part that is located the curve inboard and the second part that is located the curve outside, and the thickness of first part is less than the thickness of second part. When the material passes through the opening, the driving fin is impacted, so that the driving fin drives the first sub-spiral feeder to rotate, and the energy consumption of the first sub-spiral feeder is reduced. The driving fin is preferably welded at the opening and is positioned in the inner cavity of the rotary drum.

With respect to the centripetal pump 7

Two ends of the rotary drum are respectively provided with a set of bearing, the bearing positioned on the small end side of the straight rotary drum 2 is used as a small end main bearing 1, the bearing positioned on the small end side of the conical rotary drum 3 is used as a large end main bearing 4, the feeding channel extends to the large end main bearing side and penetrates through the large end main bearing, and the opening of the feeding channel positioned on the large end main bearing side far away from the rotary drum is used as a feeding hole. The spiral feeder is provided with a centripetal pump 7, the centripetal pump 7 is positioned at the large end of the straight-section rotary drum 2, a feed inlet of the centripetal pump 7 is communicated with an inner cavity of the rotary drum, the centripetal pump 7 is connected with a clear liquid outlet through a transmission pipeline, and the clear liquid outlet is also positioned at one side of the main bearing at the large end, which is far away from the rotary drum; the centripetal pump 7 is rotatably connected with the spiral feeder through a rotating shaft, one side of the large-end main bearing, which is far away from the rotary drum, is provided with an adjusting handle 5, and the adjusting handle 5 is connected with the rotating shaft through a transmission mechanism.

Performance or Effect

The straight section rotary drum 2 adopts a conical structure, materials enter the rotary drum (near a small end region) from the feeding pipe and flow to the large end of the rotary drum, and the liquid layer depth (fluid)The depth of the interface 6 to the inner wall of the drum) is gradually increased, and the separation factor (Fr ═ ω) to the solids in the fluid is increased²R/g) is gradually increased due to the increase of the radius R, so that the supernatant fluid at the large end part of the straight rotary drum 2 is cleaner and the sediment is more compact. The straight section rotary drum 2 adopts a conical structure, and is beneficial to conveying sediments settled on the inner wall of the rotary drum to the direction of a big end due to gradual increase of separation factors.

When the sediments enter the conical section rotary drum 3 from the straight section rotary drum extrusion section 8, the sediments need to pass through the annular baffle plate, the section of the annular baffle plate is greatly reduced, so the sediments are necessarily further compressed, the extrusion force is provided by the resultant force formed by the thrust of the helical blades and the static pressure of the fluid, and the sediments with lower water (liquid) content are discharged from the solid phase outlet, so the process requirements are met.

The diameter D of the large end is larger than the diameter D of the small end, so the space at the large end can be greatly used for discharging liquid by the centripetal pump 7, the liquid by the centripetal pump 7 can be discharged, the liquid layer depth can be adjusted without stopping by the adjusting handle, and the separation effect can be changed without stopping. The centripetal pump 7 is adopted for discharging liquid, so that a gap between the feeding pipe and the machine body is eliminated, the sealing performance of the machine body is enhanced, and the separation of volatile, inflammable and explosive materials is safer and more reliable; meanwhile, the centripetal pump 7 is adopted to discharge liquid, so that the phenomena of scouring, turbulence and the like of the fluid in the machine body are reduced, the phenomenon of liquid discharge and foaming is greatly reduced, and the centrifugal pump is particularly suitable for the fluid with higher viscosity such as food and the like.

The parallel flow type layout is adopted, materials enter the small end of the rotary drum from the spiral and flow through the large end, the flow of the materials is long, the retention time is enough to realize thorough solid-liquid separation, and therefore the straight section of the rotary drum is short; meanwhile, the cone drum is large in rotation angle and necessarily short in length, so that the total length of the drum is short, and the rigidity and the stability are easy to guarantee.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.