CN111054527A - Two-point or multi-point supported piston pusher centrifuge drum assembly - Google Patents

Abstract

A two-point or multi-point supported piston pusher centrifuge drum component comprises a main shaft, a push rod, a drum with one open end and a hole on the side wall, a pusher, a distributor, a drum support structure and a shaft sleeve; one end of the rotary drum supporting structure is fixed on the shaft sleeve, and the other end of the rotary drum supporting structure is fixed on a rotary drum wall of the rotary drum; the push rod is of a hollow tubular structure, a material channel communicated with an inner pipeline of the push rod is arranged on the main shaft between the material pusher and the distributor and/or the push rod, and the material enters a gap between the material pusher and the distributor from the material channel and then enters the rotary drum; the middle parts of the main shaft, the push rod and the shaft sleeve are provided with a washing water channel communicated with the interior of the push rod, washing water enters the interior of the rotary drum from the washing water channel, and due to the adoption of a multipoint supporting structure and a unique feeding method, the rotary drum has the advantages of large diameter, high rotating speed, long length of a filtering area, multiple stages of the rotary drum, difficulty in vibration, large separation factor, low water content of filter residues, small washing water equivalent, large production capacity and convenience in large-scale production.

Description

Two-point or multi-point supported piston pusher centrifuge drum assembly

Technical Field

The patent relates to a centrifuge drum assembly, in particular to a piston pusher centrifuge drum assembly supported by two points or multiple points.

Background

A conventional piston pusher centrifuge is a continuously operating, pulse discharge, filter centrifuge. Under the condition of high-speed operation, materials are continuously fed in from a feeding pipe positioned at the axial discharge end of the rotary drum and flow onto a filter screen of the rotary drum along a feeding distributor. The filtrate passes through the filter screen and is continuously discharged through the filtrate outlet, and filter residue accumulated on the inner surface of the filter screen is pushed out along the inner wall surface of the rotary drum by a pusher reciprocating relative to the rotary drum.

Because the material is fed in from the inlet pipe that is located the open end of rotary drum, the support of the main shaft of above-mentioned piston pusher centrifuge can only be made into unilateral support, and bearing of the supporting structure for the main shaft is located the same side of rotary drum. The supporting structure of the rotary drum belongs to a cantilever structure, one end of the rotary drum is fixed on the main shaft or the push rod, and the other end of the rotary drum is a free end (capable of generating force parallel to the axial direction and force perpendicular to the axial direction). The axial feeding end of the drum wall is connected with the main shaft or the push rod through the drum bottom (supporting structure) to support the drum, and the axial discharging end of the drum is not provided with the supporting structure and is connected with the main shaft or the push rod to support the drum.

The above structure brings a disadvantage that the stability of the one-side support is inferior to that of the two-point or multi-point support structure. The cantilever structure causes the free end of the rotary drum to vibrate under the combined action of forces parallel to the axial direction and forces perpendicular to the axial direction, and the bottom of the rotary drum at the fixed end of the rotary drum cracks when serious, so that serious accidents are caused.

On the other hand, the mechanical characteristics of the unilateral support and the cantilever structure limit the increase of the diameter, the rotating speed, the length of a filtering area and the stage number of the rotary drum, so that the piston pusher centrifuge has a series of defects of easy vibration, small separation factor, short material filtering time, high material water content, large energy consumption for drying unit products, large washing water equivalent, large washing water treatment difficulty, large ring cost conservation increase, small stage number of the rotary drum, small production capacity, no large scale and the like.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a two-point or multi-point supported rotary drum assembly for a piston pusher centrifuge, so as to overcome the disadvantages of conventional piston pusher centrifuges, such as small diameter of the rotary drum, slow rotation speed, short length of the filtering area, few stages of the rotary drum, easy vibration, too short material filtering time caused by small separation factor, too high material moisture content, large energy consumption for drying unit product, too large washing water equivalent, increased environmental protection cost caused by large difficulty in treating used washing water, few stages of the rotary drum, small production capacity and incapability of large scale.

The technical scheme adopted by the invention is as follows: a two-point or multi-point supported piston pusher centrifuge drum component comprises a main shaft, a push rod, a drum with one open end and a hole on the side wall, a pusher, a distributor, a drum support structure and a shaft sleeve;

the main shaft and the push rod are driven to rotate by an external driving mechanism arranged at the shaft end; the push rod is driven by an external driving mechanism to axially reciprocate; the main shaft is of a hollow tubular structure, and the push rod is arranged inside the main shaft; an opening is formed in the drum wall of the rotary drum to serve as a filtrate channel; the material pusher is fixedly arranged at the left end of the main shaft or the push rod; the distributor is arranged on the right side of the pusher, and a gap between the distributor and the pusher is used as a material channel; the shaft sleeve is fixedly sleeved outside the main shaft or the push rod;

the drum bottom of the drum is fixedly arranged on the main shaft or the push rod, the drum supporting structure is arranged in the circumferential direction of the shaft sleeve, one end of the drum supporting structure is fixed on the shaft sleeve, and the other end of the drum supporting structure is fixed on the drum wall of the drum; the push rod is of a hollow tubular structure, the left end of the push rod is a feeding inlet, and the right end of the push rod is a washing water inlet;

a material channel communicated with an inner pipeline of the push rod is arranged on the main shaft between the material pusher and the distributor and/or the push rod, and the material enters a gap between the material pusher and the distributor from the material channel and then enters the rotary drum; the middle parts of the main shaft, the push rod and the shaft sleeve are provided with a washing water channel communicated with the interior of the push rod, washing water enters the interior of the rotary drum from the washing water channel, and a partition plate used for separating the material channel and the washing water channel is arranged in the push rod.

Further, the drum supporting structure is composed of one or more of plates, columns, pipes, hollow shafts and fasteners which are uniformly distributed along the circumferential direction of the drum.

Furthermore, the number of the drum support structures distributed in the drum along the axial direction can be one row, the drum support structures are positioned between the axial feeding end and the axial discharging end of the drum wall, the axial length is equal to or less than the length of the drum wall filtering area, and the drum support structures form a continuous support structure; the two rows of the supporting structures are respectively positioned at the axial feeding end and the axial discharging end of the drum wall and form a simple supporting beam supporting structure supported by double supporting points; can be more than two columns, are respectively positioned between the axial feeding end and the axial discharging end of the drum wall and form a supporting structure with multiple supporting points.

Further, the rotary drum is a single-stage rotary drum or a double-stage rotary drum or a multi-stage rotary drum; the rotary drum and the rotary drum, the rotary drum and the pusher, the rotary drum and the feeding distributor, the pusher and the feeding distributor, the rotary drum and the main shaft and the rotary drum and the push rod are connected through a connecting structure to transmit power to rotate or rotate and reciprocate.

Further, the connecting structure is a combination of one or more of a plate, a column, a pipe and a fastener, or a combination of one or more of them and a fastener.

Furthermore, the material channel or the washing water channel is in a hole or circular seam form, and when the channel is a hole, two ends of the channel are in a continuous form; when the channel is a circular seam, two ends of the channel are in a disconnected form, and two ends of the circular seam are connected by adopting a connecting structure.

The invention has the advantages and characteristics that: the material is fed in the middle of the push rod, and a two-point or multi-point supporting structure mode is adopted, so that the rotary drum has large diameter, high rotating speed, long length of a filtering area and multiple stages; the method has the advantages of difficulty in vibration, large separation factor, prolonged material filtering time due to the increase of the length of the filtering area, low water content of filter residue, small washing water equivalent, large production capacity, capability of being large-sized, energy conservation, consumption reduction, emission reduction and environmental protection.

Drawings

FIG. 1 is a schematic view of the overall structure of the preferred embodiment of the present invention (pusher reciprocating, drum not reciprocating);

FIG. 2 is a schematic view of the overall structure of another preferred embodiment of the present invention (inner first layer drum reciprocating, pusher not reciprocating);

FIG. 3 is a schematic view of the overall structure of another preferred embodiment of the present invention (inner second layer drum, pusher reciprocating, other layer drums not reciprocating);

FIG. 4 is a schematic view of the overall structure of another preferred embodiment of the present invention (pusher reciprocating, drum not reciprocating);

FIG. 5 is a schematic view of the overall structure of another preferred embodiment of the present invention (the pusher does not reciprocate, the inner first layer drum reciprocates);

FIG. 6 is a schematic view of the overall structure of another preferred embodiment of the present invention (pusher reciprocating, second layer drum reciprocating, other layer drum not reciprocating);

FIG. 7 is a cross-sectional view of the structure of FIG. 1 at the middle thereof;

FIG. 8 is a schematic perspective view of a drum device according to a preferred embodiment of the present invention (the drum is partially shown on its side for ease of illustration of the internal structure);

FIG. 9 is a schematic perspective view of a drum device according to another preferred embodiment of the present invention (the drum is partially shown on its side for easy illustration of the internal structure);

fig. 10 is a schematic perspective view of the axial discharge end of the drum device according to the preferred embodiment of the present invention (in the case that the drum support structures 6 are arranged in a row in the axial direction inside the drum).

Description of the drawings: the arrows in the figure represent the movement path of the material or the washing water.

The reference numbers in the figures denote: 1-main shaft, 2-push rod, 21-feeding inlet, 22-washing water inlet, 23-material channel, 24-washing water channel, 25-division plate, 3-rotary drum, 31-rotary drum bottom, 32-rotary drum wall, 4-pusher, 5-distributor, 6-rotary drum supporting structure, 7-shaft sleeve, 8-rotary drum axial discharging end and 9-connecting structure.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1, a two-point or multi-point supported piston pusher centrifuge drum assembly includes a main shaft 1, a push rod 2, a drum 3 with an open end and a hole on a side wall, a pusher 4, a distributor 5, a drum support structure 6, and a shaft sleeve 7;

the spindle 1 and the push rod 2 are driven to rotate by an external driving mechanism (the external driving mechanism is conventional equipment, so the external driving mechanism is not shown in the figure); the push rod 2 is driven by an external driving mechanism to axially reciprocate; the main shaft 1 is of a hollow tubular structure, and the push rod 2 is arranged inside the main shaft 1; the drum wall 32 of the drum 3 is provided with an opening as a filtrate channel; the material pushing device 4 is fixedly arranged at the left end of the main shaft 1 or the push rod 2; the distributor 5 is arranged on the right side of the pusher 4, and a gap between the distributor and the pusher is used as a material channel; the shaft sleeve 7 is fixedly sleeved outside the main shaft 1 or the push rod 2;

the drum bottom 31 of the drum 3 is fixedly arranged on the main shaft 1 or the push rod 2, the drum support structures 6 are uniformly distributed in the circumferential direction of the shaft sleeve 7, one end of each drum support structure 6 is fixed on the shaft sleeve 7, and the other end of each drum support structure is fixed on the drum wall 32 of the drum 3; the push rod 2 is of a hollow tubular structure, the left end of the push rod 2 is a feeding inlet 21, and the right end of the push rod 2 is a washing water inlet 22;

a material channel 23 (a structure form is a through hole) communicated with an inner pipeline of the push rod is arranged on the main shaft 1 and/or the push rod 2 between the material pusher 4 and the distributor 5, and the material enters a gap between the material pusher 4 and the distributor 5 from the material channel and then enters the rotary drum; the middle parts of the main shaft 1, the push rod 2 and the shaft sleeve 7 are provided with a washing water channel 24 (the structure form is a through hole) communicated with the inside of the push rod, washing water enters the inside of the rotary drum from the washing water channel, and a partition plate 25 used for separating the material channel 21 and the washing water channel 22 is arranged in the push rod.

Specifically, the drum support structure 6 is composed of one or more of plates, columns, pipes, hollow shafts and fasteners which are uniformly distributed along the circumferential direction of the drum. In view of ease of processing, the reinforcing structure 7 and the distributor 5 are integrally connected. The drum support structures 6 are distributed in the drum along the axial direction, and can be arranged in a row, and are positioned between the axial feeding end and the axial discharging end of the drum wall 32, the axial length is equal to or less than the length of the drum wall filtering area, and the drum support structures become continuous support structures (see fig. 1 and 4);

example 2:

the difference from the embodiment 1 is that the number of the drum support structures 6 distributed in the axial direction in the drum can be two rows (see fig. 2 and 5), which are respectively located at the axial feeding end and the axial discharging end of the drum wall 32 and become a simple beam support structure supported by double supporting points; more than two rows (see fig. 3 and 6) may be provided, each between the axial feed end and the discharge end of the drum wall 32, to provide a multi-pivot support structure.

Example 3:

the difference from embodiment 1 is that the material channel 23 or the washing water channel 24 is in other structural forms such as a circular seam on the push rod 2, and two ends of the circular seam are connected by the connecting structure 9, and the torque of the driving mechanism is transmitted through the connecting structure 9 (see the area with the connecting structure 9 in fig. 2, 3, 4, 5, 6, and 9). The connecting structure 9 may be a combination of one or more of a plate, a post, a tube, and a fastener (e.g., a screw, a bolt), or a combination of one or more of a plurality of types of plates, posts, tubes, and fasteners (e.g., a structure similar to a shaft coupling).

Example 4:

the difference from the embodiment 1 is that, referring to fig. 2 to 6, the drum 3 is a single-stage drum or a double-stage drum or a multi-stage drum; the rotary drum and the rotary drum, the rotary drum and the pusher, the rotary drum and the feeding distributor, the pusher and the feeding distributor, the rotary drum and the main shaft and the rotary drum and the push rod are connected through a connecting structure 9 to transmit power to rotate or rotate and reciprocate.

The distributor 5 and the reinforcing structure 7 in fig. 2-6 can be designed as an integral structure (or as a non-integral connecting structure) in view of easy processing.

In order to show the structure more clearly, fig. 8, 9 and 10 show the structure of the three-dimensional structure at the drum (only taking the drum structure in fig. 1 and 4 as an example, fig. 8 corresponds to the drum in fig. 1, and fig. 9 corresponds to the drum in fig. 4).

The specific operation principle is as follows: the material enters from a feed inlet 21 of the push rod 2, the washing water enters from a washing water inlet of the push rod 2, and a material channel 23 and a washing water channel 24 are arranged in the area of the push rod 2 where the rotary drum 3 is located; the material enters the interior of the rotary drum through the material channel 23, and the washing water enters the interior of the rotary drum through the washing water channel 24. Washing water enters the rotary drum 3 from the washing water channel 24, the rotary drum 3 rotates under the action of the driving mechanism 6, materials are dried under the action of centrifugal force, filtrate is separated out from the open holes of the rotary drum wall 32, filter residues are left on the side wall of the rotary drum wall 32 to form a barrel-shaped filter cake 10, and the filter cake is pushed out of the open end of the rotary drum 3 by a material pusher 4 or the rotary drum 3 which reciprocates left and right (the displacement of the left and right reciprocating motion (the displacement is limited by the unclosed material channel or the washing water channel) for a section.

The cantilever beam supporting structure supported by a single pivot at the axial feeding end of the rotary drum wall is changed into a simple beam supporting structure supported by double pivots at the axial feeding end and the axial discharging end of the rotary drum wall, or is changed into a supporting structure with multiple pivots between the axial feeding end and the axial discharging end of the rotary drum wall, or is changed into a plate supporting structure with the length approximately equal to the length of a filter area of the rotary drum wall; the strength of the drum wall is greatly enhanced, so that the drum has large diameter, high rotating speed, long filtering area, multiple stages of the drum, difficult vibration, large separation factor, increased length of the filtering area, prolonged filtering time of materials, low water content of filter residues, small washing water equivalent, large production capacity and large scale.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated.

The foregoing shows and describes the general principles and features of the present invention, together with the 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 for the purpose of illustrating the structural relationship and principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A two-point or multi-point supported piston pusher centrifuge drum component comprises a main shaft (1), a push rod (2), a drum (3) with an open end and a hole on the side wall, a pusher (4), a distributor (5), a drum support structure (6) and a shaft sleeve (7); the method is characterized in that:

the main shaft (1) and the push rod (2) are driven to rotate by an external driving mechanism arranged at the shaft end; the push rod (2) is driven by an external driving mechanism to do axial reciprocating motion; the main shaft (1) is of a hollow tubular structure, and the push rod (2) is arranged inside the main shaft (1); an opening hole is formed in a drum wall (32) of the drum (3) and is used as a filtrate channel; the material pushing device (4) is fixedly arranged at the left end of the main shaft (1) or the push rod (2); the distributor (5) is arranged on the right side of the pusher (4), and a gap between the distributor and the pusher is used as a material channel; the shaft sleeve (7) is fixedly sleeved outside the main shaft (1) or the push rod (2);

a drum bottom (31) of the drum (3) is fixedly arranged on the main shaft (1) or the push rod (2), the drum support structure (6) is arranged in the circumferential direction of the shaft sleeve (7), one end of the drum support structure (6) is fixed on the shaft sleeve (7), and the other end of the drum support structure is fixed on a drum wall (32) of the drum (3); the push rod (2) is of a hollow tubular structure, the left end of the push rod (2) is a feeding inlet (21), and the right end of the push rod (2) is a washing water inlet (22);

a material channel (23) communicated with an inner pipeline of the push rod is arranged on the main shaft (1) and/or the push rod (2) between the material pusher (4) and the distributor (5), and the material enters a gap between the material pusher (4) and the distributor (5) from the material channel (23) and then enters the rotary drum; the middle parts of the main shaft (1), the push rod (2) and the shaft sleeve (7) are provided with a washing water channel (24) communicated with the inside of the push rod, washing water enters the inside of the rotary drum from the washing water channel, and a partition plate (25) used for separating the material channel (21) and the washing water channel (22) is arranged in the push rod.

2. The two or more point supported pusher centrifuge bowl assembly of claim 1 wherein: the drum supporting structure (6) is composed of one or more of plates, columns, pipes, hollow shafts and fasteners which are uniformly distributed along the circumferential direction of the drum.

3. The two or more point supported pusher centrifuge bowl assembly of claim 1 wherein: the number of the drum supporting structures (6) distributed in the drum along the axial direction can be one row, the drum supporting structures are positioned between the axial feeding end and the axial discharging end of the drum wall (32), the axial length is equal to or less than the length of the drum wall filtering area, and the drum supporting structures become continuous supporting structures; can be two lines which are respectively positioned at the axial feeding end and the axial discharging end of the drum wall (32) to form a simple supporting beam supporting structure supported by double supporting points; can be more than two columns which are respectively positioned between the axial feeding end and the axial discharging end of the drum wall (32) and become a supporting structure with multiple supporting points.

4. The two or more point supported pusher centrifuge bowl assembly of claim 1 wherein: the rotary drum (3) is a single-stage rotary drum or a double-stage rotary drum or a multi-stage rotary drum; the rotary drum and the rotary drum, the rotary drum and the pusher, the rotary drum and the feeding distributor, the pusher and the feeding distributor, the rotary drum and the main shaft and the rotary drum and the push rod are connected through a connecting structure (9) to transmit power to rotate or rotate and reciprocate.

5. The two or more point supported pusher centrifuge bowl assembly of claim 4 wherein: the connecting structure (9) is a combination of one or more of a plate, a column, a pipe and a fastener, or a combination of one or more of a plurality of the plates, the columns and the pipe and the fastener.

6. The two or more point supported pusher centrifuge bowl assembly of claim 5, wherein: the material channel (23) or the washing water channel (24) is in a hole or circular seam form, and when the channel is a hole, two ends of the channel are in a continuous form; when the channel is a circular seam, two ends of the channel are in a disconnected form, and two ends of the circular seam are connected by adopting a connecting structure (9).

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