CN213078803U - Four-stage piston pusher centrifuge - Google Patents

Abstract

The utility model provides a level four piston pushes away material centrifuge. The four-stage piston pusher centrifuge replaces a material distribution disc in the three-stage pusher centrifuge with a rotary drum, and the rotary drum is marked as a zero-stage rotary drum; the zero-level rotary drum is of a conical cylindrical structure, one end with the larger diameter in two end faces is provided with an opening and faces the feeding pipe, the end with the smaller diameter is sealed, the inner layer of the side wall of the zero-level rotary drum is a screen, the outer layer of the side wall of the zero-level rotary drum is a solid wall surface, and the interlayer is connected with a drain pipe and sequentially penetrates through the rotary drums at all levels to the liquid; the outer side wall extends around the edge of the opening end to form an extending edge at one end, and is fixed on the secondary drum according to a structure consistent with the original material distribution disc and is abutted against the primary drum. The utility model provides a level four piston pushes away material centrifuge has solved in the piston of prior art pushes away material centrifuge along with the increase of rotary drum progression, and the requirement of manufacturing, assembly precision improves rapidly, and manufacturing cost, running cost rise rapidly, lead to stopping in tertiary piston pushes away material centrifuge's technical problem.

Description

Four-stage piston pusher centrifuge

Technical Field

The utility model relates to a centrifuge field, concretely relates to level four piston pushes away material centrifuge.

Background

The piston pusher centrifuge is a filtering centrifuge which adopts a pusher disk to continuously push out and unload filter cakes formed in a rotary drum, and because thick-layer filter cakes are filtered, fine particles have small leakage loss and are insensitive to the change of the concentration of suspension liquid, so the piston pusher centrifuge is suitable for separating various materials. To achieve low cake water content, it is desirable to lengthen the drum to increase the residence time of the separated material in the drum. However, as the length of the drum increases, the resistance to pushing the filter cake increases and often the cake becomes arched or heaped due to insufficient strength of the cake, thereby disrupting dewatering, washing and normal discharge of the cake, and even creating a centrifuge dead-weight or shutdown due to intense vibration. Piston pusher centrifuges with two or more drum stages have been developed for this purpose. The length of each stage of rotary drum is less than that of single-stage rotary drum, the total length of each stage of rotary drum is greater than that of single-stage piston pusher centrifuge rotary drum, and the preceding stage rotary drum is the pusher of the latter stage rotary drum, so that the filter cake layer can be correspondingly thinned while the retention time of the same filter cake is ensured, and the filter cake can be loosened when being pushed from the previous stage rotary drum to the next stage rotary drum, and the dewatering and washing effects can be improved. However, with the increase of the number of stages of the rotary drum, the requirements on the manufacturing and assembling precision of the centrifuge are rapidly increased, the production cost of the centrifuge is increased, the maintenance cost in daily operation is correspondingly increased, and the three-stage piston pusher centrifuge is generally stopped at present.

SUMMERY OF THE UTILITY MODEL

Along with the increase of rotary drum progression in the piston pushing centrifugal machine for solving prior art, the requirement of manufacturing, assembly precision improves rapidly, and manufacturing cost, running cost rise rapidly, lead to stopping in tertiary piston pushing centrifugal machine's technical problem, the utility model provides a can effectually avoid the level four piston pushing centrifugal machine of above-mentioned problem.

A four-stage piston pusher centrifuge replaces a material distribution disk in a three-stage pusher centrifuge with a rotary drum, and the rotary drum is marked as a zero-stage rotary drum; the zero-level rotary drum is of a conical cylindrical structure, one end with the larger diameter of the two end faces of the zero-level rotary drum is provided with an opening and faces the feeding pipe, the other end with the smaller diameter of the zero-level rotary drum is sealed, the side wall of the zero-level rotary drum is of a double-layer structure, the inner layer is a screen mesh, and the outer layer is a solid wall surface; the side wall of the outer layer further extends to the periphery at the edge of the opening end to form an extending edge at one end; the extension edge is fixed on the secondary drum according to a structure consistent with the original material distribution disc, and the edge of the extension edge is abutted against the primary drum according to a structure consistent with the original material distribution disc; the interlayer of the zero-level rotary drum is also connected with one or more drain pipes, and the drain pipes sequentially penetrate through the extension edge, the first-level rotary drum, the connecting rod of the first-level rotary drum and the third-level rotary drum, the third-level rotary drum and reach a liquid discharge cavity of the centrifuge.

The utility model provides a level four piston pushing centrifugal machine's a preferred embodiment, still remain the cloth dish among the tertiary pushing centrifugal machine, only set up the through-hole in the central authorities of cloth dish, the through-hole is equipped with the setting zero order rotary drum, same open end is towards the inlet pipe, and the extension limit is fixed in the cloth dish, the drain pipe runs through connecting rod, the tertiary rotary drum of cloth dish, one-level rotary drum and tertiary rotary drum in proper order, to centrifugal machine's flowing back intracavity.

In a preferred embodiment of the four-stage piston pusher centrifuge provided by the utility model, a baffle plate is further arranged on one side of the extending edge or the cloth disc close to the feeding pipe; the striker plate is fixed on the extending edge or the material distribution plate through a plurality of connecting rods, and a certain gap is formed between the striker plate and the extending edge or the material distribution plate; and the water discharge pipe passes through the space between the baffle plate and the extending edge. The baffle plate is an annular plate, the inner diameter and the outer diameter of the baffle plate are respectively smaller than and larger than the opening diameter of the zero-order rotary drum, and the feeding pipe penetrates through the baffle plate to a position close to the bottom of the zero-order rotary drum. And a circle of side baffle plates are arranged on the outer edge of the baffle plate and one side of the baffle plate close to the zero-order rotary drum. And the axial included angle between the side baffle and the zero-order rotary drum is 0-45 degrees.

The utility model provides a level four piston pushes away material centrifuge's a preferred embodiment, the drain pipe is the stereoplasm body, and its one end is close to with the intermediate layer zero order rotary drum open-ended one end is connected, and the other end right angle is buckled and is passed the striker plate with extend the clearance between the limit, the right angle is buckled again, runs through in proper order extend limit or cloth dish, one-level rotary drum and the connecting rod of tertiary rotary drum, tertiary rotary drum. The drain pipe penetrates through the extension edge or the material distribution disc, the first-stage rotary drum, a connecting rod of the first-stage rotary drum and the third-stage rotary drum in sequence in a relatively sliding structure. The drain pipe is kept extending in the axial direction and not bent after penetrating through a liquid discharge cavity of the centrifuge, and a sealing ring is arranged on the outer wall of the drain pipe and forms a piston structure with the three-stage rotary drum. The drain pipe is also provided with one or more reinforcing parts connected with the extension edge or the cloth disc.

Compared with the prior art, the utility model provides a level four piston pushes away material centrifuge improves current tertiary piston pushes away material centrifuge, replaces original cloth dish or adds on original cloth dish with the one-level rotary drum zero order rotary drum. Therefore, the original power mechanism can be used, the operation mode of the centrifugal machine is not changed, and the manufacturing and assembling precision can meet the requirements of the original three-stage rotary drum. Because large-scale structural change is not needed, the problems of production cost and operation and maintenance cost increase caused by adding a first-level rotary drum are effectively avoided.

The zero-order rotary drum adopts the inclined side wall to carry out centrifugal dehydration, the materials keep moving in the rotary drum, and the materials roll to the edge while carrying out the centrifugal dehydration, thereby realizing the simultaneous centrifugation and unloading, needing no additional layer of pushing mechanism, and playing the effects of simplifying the structure and reducing the cost.

Drawings

FIG. 1 is a cross-sectional view of a three stage piston pusher centrifuge of the prior art;

FIG. 2 is an enlarged fragmentary view of a portion of the drum of FIG. 1;

FIG. 3 is a partial cross-sectional view of a bowl of a four-stage piston pusher centrifuge provided by the present invention;

fig. 4 is a partially enlarged view of fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

The four-stage piston pusher centrifuge 2 is an improvement of the existing three-stage piston pusher centrifuge 1, and for convenience of subsequent description, parts of the three-stage piston pusher centrifuge 1 are labeled first. Referring to fig. 1 and 2, a three-stage pusher centrifuge 1 and a drum 12 thereof are partially cut away in the related art.

The three-stage piston pusher centrifuge 1 comprises a power part 11 and a rotary drum 12. The rotary drum 12 comprises a material distribution disc 21, a first-stage rotary drum 22, a second-stage rotary drum 23, a third-stage rotary drum 24 and a centrifuge shell 25 which are sequentially arranged from inside to outside. A discharge cavity 26 is arranged in the centrifuge shell 25 and on the right side of the three-stage rotary drum 24; the other part is a drain cavity 27.

Wherein the material distribution disc 21 and the secondary rotary drum 23 are fixedly connected; the first-stage rotary drum 22 and the third-stage rotary drum 24 are fixedly connected; the periphery of the cloth disc 31 and the secondary drum 23 synchronously rotate, and the cloth disc and the secondary drum reciprocate. The feed tube 28 extends through the centrifuge housing 25 on the right side to a position near the center of the distribution tray 21.

The inner walls of the three rotary drums close to the right side are provided with screens, materials enter the material distribution disc 21 through the material inlet pipe 28 and are thrown to the inner wall of the first-stage rotary drum 22 for centrifugation.

When the material distribution disc 21 and the secondary rotary drum 23 move rightwards, the material distribution disc 21 pushes materials from the primary rotary drum 22 to the secondary rotary drum 23 for centrifugation.

When the material distribution disc 21 and the secondary rotary drum 23 move leftwards, the primary rotary drum 22 pushes the materials from the secondary rotary drum 23 to the tertiary rotary drum 24 for centrifugation.

When the material distribution disc 21 and the secondary rotary drum 23 move rightwards again, the secondary rotary drum 23 pushes the material from the tertiary rotary drum 24 to the discharging cavity 26.

Please refer to fig. 3 and fig. 4, which are a cross-sectional view and a partial enlarged view of the drum 12 of the four-stage piston pusher centrifuge 2 according to the present invention.

In the four-stage piston pusher centrifuge 2, a large through hole is arranged in the center of the material distribution disc 21, and a zero-stage rotary drum 13 is arranged in the through hole. The zero-order rotary drum 13 is of a conical cylindrical structure, the end face with the smaller diameter in the two end faces is sealed, and the end face with the larger diameter is an opening. The edge of the opening is provided with a section of extending edge 31 which is fixed on the rest of the cloth disc 21 through a plurality of bolts. The zero-order drum 13 opens into the feed pipe 28, and the feed pipe 28 further extends to a position close to the small end surface of the bottom of the feed pipe.

And a layer of screen is arranged on the inner side wall of the zero-level rotary drum 13, and an interlayer 32 is formed between the screen and the side wall. The interlayer 32 is symmetrically connected with four drain pipes 33 at one end close to the opening, and the drain pipes extend towards the direction close to the first-stage rotary drum 22 at an angle parallel to the extending edge 31 and the cloth disc 21, are bent by 90 degrees, and sequentially penetrate through the cloth disc 21, the first-stage rotary drum 22, a connecting column between the first-stage rotary drum 22 and the fourth-stage rotary drum 25, the fourth-stage rotary drum 25 and reach the liquid discharge cavity 27.

A proper gap should be maintained while passing through so that the drain pipe 33 can smoothly reciprocate. Further, a sealing ring can be arranged at the tail end of the water drainage pipe, so that the water drainage pipe is prevented from flowing back through the gap. Further, a certain amount of reinforcing member may be provided between the water discharge pipe 33 and the cloth tray 21 to prevent the water discharge pipe 33 from being deformed to affect the reciprocating motion.

And the zero-order rotary drum 13 is fixed on the bolts of the material distribution disc 21, and is also provided with another connecting rod for installing a material baffle 34. The material baffle plate 34 is an annular plate, a through hole is reserved in the center of the annular plate for the feed pipe 28 to pass through, and a ring of side baffle plates 35 are arranged on the edge of the annular plate. The side baffle 35 and the axial direction of the zero-order rotary drum 13 form an included angle of 40 degrees.

In specific implementation, the material enters through the feeding pipe 28, and first rushes to the small end face at the bottom of the zero-order drum 13, and at this time, the material takes part of the function of the distribution disc 21, and is thrown onto the screen on the side wall of the zero-order drum 13 to perform primary centrifugation.

The primarily centrifuged water flows to the liquid discharge cavity 27 through the water discharge pipe 33, and the material moves along the side wall under the action of centrifugal force and continuously flies out to collide with the material baffle plate 34 under the action of inertia. And under the guidance of the baffle plate 34 and the side baffle plate 35, the cloth returns to the extending edge 31 and the cloth tray 21 again, and is thrown to the primary rotary drum 22.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the present specification can be changed, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims (10)

1. A four-stage piston pusher centrifuge is characterized in that: replacing a material distribution disc in the three-stage material pushing centrifugal machine with a rotary drum, and marking as a zero-level rotary drum; the zero-level rotary drum is of a conical cylindrical structure, one end with the larger diameter of the two end faces of the zero-level rotary drum is provided with an opening and faces the feeding pipe, the other end with the smaller diameter of the zero-level rotary drum is sealed, the side wall of the zero-level rotary drum is of a double-layer structure, the inner layer is a screen mesh, and the outer layer is a solid wall surface; the side wall of the outer layer further extends to the periphery at the edge of the opening end to form an extending edge at one end; the extension edge is fixed on the secondary drum according to a structure consistent with the original material distribution disc, and the edge of the extension edge is abutted against the primary drum according to a structure consistent with the original material distribution disc; the interlayer of the zero-level rotary drum is also connected with one or more drain pipes, and the drain pipes sequentially penetrate through the extension edge, the first-level rotary drum, the connecting rod of the first-level rotary drum and the third-level rotary drum, the third-level rotary drum and reach a liquid discharge cavity of the centrifuge.

2. The four-stage piston pusher centrifuge of claim 1 wherein: the material distributing disc in the three-stage pusher centrifuge is still reserved, the through hole is only formed in the center of the material distributing disc, the zero-stage rotary drum is arranged in the through hole, the same opening end faces the feeding pipe, the extending edge is fixed on the material distributing disc, and the drain pipe sequentially penetrates through the material distributing disc, the first-stage rotary drum, the connecting rod of the first-stage rotary drum and the third-stage rotary drum, the third-stage rotary drum and the liquid drainage cavity of the centrifuge.

3. The four-stage piston pusher centrifuge of claim 1 or 2, wherein: a material baffle plate is arranged on one surface of the extending edge or the material distribution plate close to the material inlet pipe; the striker plate is fixed on the extending edge or the material distribution plate through a plurality of connecting rods, and a gap is formed between the striker plate and the extending edge or the material distribution plate; and the water discharge pipe passes through the space between the baffle plate and the extending edge.

4. The quaternary piston pusher centrifuge of claim 3, wherein: the baffle plate is an annular plate, the inner diameter and the outer diameter of the baffle plate are respectively smaller than and larger than the opening diameter of the zero-order rotary drum, and the feeding pipe penetrates through the baffle plate to a position close to the bottom of the zero-order rotary drum.

5. The quaternary piston pusher centrifuge of claim 4, wherein: and a circle of side baffle plates are arranged on the outer edge of the baffle plate and one side of the baffle plate close to the zero-order rotary drum.

6. The quaternary piston pusher centrifuge of claim 5, wherein: and the axial included angle between the side baffle and the zero-level rotary drum is 0-45 degrees.

7. The quaternary piston pusher centrifuge of claim 3, wherein: the water discharge pipe is a hard pipe body, one end of the water discharge pipe is connected with one end, close to the zero-level rotary drum opening, of the interlayer, the other end of the water discharge pipe is bent at a right angle to penetrate through a gap between the baffle plate and the extending edge, and then bent at a right angle to sequentially penetrate through the extending edge or the cloth disc, the first-level rotary drum, a connecting rod of the first-level rotary drum and the third-level rotary drum, and the third.

8. The four-stage piston pusher centrifuge of claim 7 wherein: the drain pipe penetrates through the extension edge or the material distribution disc, the first-stage rotary drum, a connecting rod of the first-stage rotary drum and the third-stage rotary drum in sequence in a relatively sliding structure.

9. The four-stage piston pusher centrifuge of claim 8 wherein: the drain pipe is kept extending in the axial direction and not bent after penetrating through a liquid discharge cavity of the centrifuge, and a sealing ring is arranged on the outer wall of the drain pipe and forms a piston structure with the three-stage rotary drum.

10. The four-stage piston pusher centrifuge of claim 9 wherein: the drain pipe is also provided with one or more reinforcing parts connected with the extension edge or the cloth disc.

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