CN108940611B

CN108940611B - Horizontal spiral centrifuge

Info

Publication number: CN108940611B
Application number: CN201810811540.6A
Authority: CN
Inventors: 徐志鑫; 雷魏巍; 徐芬
Original assignee: Zhejiang Zhengda Environmental Protection Equipment Co ltd
Current assignee: Zhejiang Zhengda Environmental Protection Equipment Co ltd
Priority date: 2018-07-23
Filing date: 2018-07-23
Publication date: 2020-09-22
Anticipated expiration: 2038-07-23
Also published as: CN108940611A

Abstract

The invention relates to a horizontal spiral centrifuge, which comprises a rotary drum, a spiral conveyor, a main motor and an auxiliary motor, wherein the rotary drum comprises a rotary drum part cylindrical section and a rotary drum part conical dehydration section, the spiral conveyor comprises a conveyor part conical section, a feeding bin and a conveyor part cylindrical section which are sequentially arranged, the feeding bin is provided with a discharge hole and is hermetically connected with a feeding pipe, a slag discharge port is arranged at the small-diameter end of the rotary drum part conical section, an end ring is arranged at one end of the rotary drum part cylindrical section, which is far away from the rotary drum part conical section, a liquid outlet is formed between the end ring and the conveyor part cylindrical section, a separation liquid pool is enclosed between the end ring and the rotary drum, and the feeding pipe comprises an outer pipe which is rotationally and hermetically connected with the feeding bin. The invention provides a horizontal spiral centrifuge which can clean a feeding pipe with small solid content in discharged liquid, and solves the problems that the solid content in the liquid is high and the feeding pipe cannot be cleaned in the self-discharging liquid of the existing centrifuge.

Description

Horizontal spiral centrifuge

Technical Field

The invention relates to a centrifugal machine, in particular to a horizontal spiral centrifugal machine.

Background

Centrifuges are machines that utilize centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid. The centrifuge is mainly used for separating solid particles from liquid in suspension, or separating two liquids which have different densities and are insoluble with each other in emulsion (for example, cream is separated from milk); it can also be used to remove liquids from wet solids, such as by spin drying clothes in a washing machine; the special overspeed tubular separator can also separate gas mixtures with different densities; some settling centrifuges can also grade solid particles according to density or granularity by utilizing the characteristic that solid particles with different densities or granularities have different settling speeds in liquid. The centrifugal machine has horizontal and vertical types, wherein the horizontal type centrifugal machine leads suspension liquid to enter the rotary drum from the spiral conveyor through the feeding pipe, solid phase particles with larger specific gravity are deposited on the inner wall of the rotary drum under the action of centrifugal force generated by rotation at the high speed, and the spiral blades which move relative to the rotary drum continuously scrape the solid phase particles deposited on the inner wall of the rotary drum and push the solid phase particles out of the slag discharge port. The separated clear liquid is discharged through a liquid outlet, and the difference between the rotary drum and the screw conveyor is controlled by an auxiliary motor. The existing horizontal centrifuge has the following defects: the rotary drum discharges clear liquid in a straight-through way at the end part, so that the phenomenon that solid particles are clamped in the clear liquid is easily generated; the feed pipe cannot be cleaned; the auxiliary motor drives the spiral conveyor through a belt, so that the mechanism is poor in compactness; the space between the screw conveyor and the rotary drum can not be thoroughly cleaned, and the residues inside can be rotten and smell when the device is not used for a long time, so that the environmental sanitation is influenced; when the slag discharging port discharges slag, the blade on the screw conveyor can be damaged.

Disclosure of Invention

The invention provides a horizontal spiral centrifuge which can clean a feeding pipe with small solid content in discharged liquid, and solves the problems that the solid content in the liquid is high and the feeding pipe cannot be cleaned in the self-discharging liquid of the existing centrifuge.

The technical problem is solved by the following technical scheme: a horizontal spiral centrifuge comprises a frame, a shell arranged on the frame, a rotary drum rotationally connected in the shell, a spiral conveyor rotationally connected on the frame and positioned in the rotary drum, a main motor driving the rotary drum to rotate and an auxiliary motor driving the spiral conveyor, wherein the rotary drum comprises a rotary drum part cylindrical section and a rotary drum part conical dehydration section, the spiral conveyor comprises a conveyor part conical section matched with the rotary drum part conical dehydration section, a feeding bin and a conveyor part cylindrical section matched with the rotary drum part cylindrical section which are sequentially arranged, the feeding bin is provided with a discharge hole and is hermetically connected with a feeding pipe, a slag discharge port is arranged at the small-diameter end of the rotary drum part conical section, an end ring is arranged at one end, away from the rotary drum part conical section, of the rotary drum part cylindrical section, a liquid outlet is formed between the end ring and the conveyor part cylindrical section, and a separation liquid pool is formed between the end ring and the, the feed pipe comprises an outer pipe connected with the feed bin in a rotating and sealing mode and an inner pipe connected in the outer pipe in a pluggable mode. The end rings are arranged to form a separation liquid pool, so that liquid can be discharged only in an overflow mode, and therefore, the liquid is fixed to generate sediment and is not easy to discharge so as to reduce the fixed content in the discharged liquid. The inlet pipe has inner tube and outer tube to constitute to can make between inlet pipe and the relevant part link together reliably like current mode promptly, can extract the inner tube again simultaneously and clean (the material is through inner tube input feed bin), thereby overcome current inlet pipe and can not conveniently dismantle down the problem of wasing.

Preferably, the slag discharge is located on the circumferential surface of the bowl between adjacent vanes on the conical section of the conveyor section. The technical scheme is changed, so that the damage to the blades during the discharge of the solids can be avoided.

Preferably, a driving shaft is arranged at one end, away from the conical section of the conveyor part, of the cylindrical section of the conveyor part, and a power output shaft of the auxiliary motor is directly connected with the driving shaft through a coupling. The problem of current auxiliary motor drive compact structure nature poor through the belt is solved.

Preferably, a cone protruding towards the feeding pipe is arranged in the feeding bin, the cone is coaxial with the feeding pipe, and the inlet end of the discharging hole is aligned with the peripheral surface of the cone. The structural drive of the bin can be improved, and the suspension entering the bin can be smoothly discharged into the rotary drum.

Preferably, the rotary drum is provided with a permanent magnet ring, the end ring is adsorbed on the end part of the rotary drum through the permanent magnet ring, and the rack is provided with an electromagnet ring which enables the end ring to be separated from the rotary drum. When the rotary drum and the spiral conveyor need to be cleaned, the electromagnet ring is electrified, overcomes the suction force of the permanent magnet ring, and separates the end ring from the rotary drum, so that the water outlet end of the rotary drum is in a straight-through type, and the phenomenon that solids are deposited in the rotary drum and cannot be discharged is avoided. Thereby enabling to improve the cleaning effect.

Preferably, the end face of the rotary drum is provided with an annular connecting groove extending along the circumferential direction of the rotary drum, the end ring is provided with an annular flanging, the annular flanging is inserted into the annular connecting groove, and an annular sealing ring for hermetically connecting the end ring and the rotary drum is arranged between the outer circumferential surface of the annular flanging and the annular connecting groove. The centrifugal force generated by the drum can be utilized to improve the reliability of the connection between the end ring and the drum.

Preferably, the cylindrical section of the conveyor part is of a tubular structure, a plurality of water distribution holes are formed in the wall of the cylindrical section of the conveyor part, the feeding bin is provided with a through hole communicated with the inner space of the cylindrical section of the conveyor part, and a flexible inflating bag for sealing the water distribution holes and the through hole is arranged in the cylindrical section of the conveyor part. When solid-liquid separation is carried out, suspension liquid is prevented from entering the spiral conveyor under the action of the flexible air bags. When cleaning, the flexible inflatable bag is deflated, cleaning water is input into the bin through the inlet pipe, then enters the cylindrical section of the conveyor part through the through hole and flows out of the water distribution hole, so that the spiral conveyor is cleaned, the flexible inflatable bag is repeatedly inflated during cleaning, and the pressure of water discharged from the water distribution hole is increased by inflating the flexible inflatable bag to improve the cleaning effect.

Preferably, the flexible inflatable bag is provided with a clamping air bag which extends into the feeding bin through the through hole and is communicated with the flexible inflatable bag. The impact force of the suspension flowing in from the feeding pipe can be utilized to improve the reliability of the flexible inflatable bag when the through hole is sealed.

Preferably, a driving shaft is arranged at one end, away from the conical section of the conveyor part, of the cylindrical section of the conveyor part, and an air passage for inflating and deflating the flexible inflatable bag is arranged in the driving shaft.

The invention has the following advantages: the solid content in the discharged liquid is low; the feeding pipe can be cleaned; the structure is compact and good; the blades are not lost during slag discharge; when not used, the rotary drum and the screw conveyor can be cleaned fully.

Drawings

Fig. 1 is a schematic diagram of a first embodiment.

FIG. 2 is a diagram illustrating a second embodiment.

In the figure: the device comprises a frame 1, an electromagnet ring 11, a guide rod 12, a shell 2, a rotary drum 3, the rotary drum 3, a cylindrical section 31 of the rotary drum part, an annular connecting groove 311, a conical dewatering section 32 of the rotary drum part, an end ring 33, an annular flange 331, a liquid outlet 34, a liquid separating tank 35, a slag discharging port 36, a permanent magnet ring 37, an annular sealing ring 38, a spiral conveyor 4, a conical section 41 of the conveyor part, a feeding bin 42, a discharging hole 421, a cone 422, a through hole 423, a cylindrical section 43 of the conveyor part, a water distribution hole 431, blades 44, a driving shaft 45, an air passage 451, a main motor 5, an auxiliary motor 6, a feeding pipe 7, an outer pipe 71, an inner pipe 72, a flexible inflatable bag.

Detailed Description

The invention is further described with reference to the following figures and examples.

First embodiment, referring to fig. 1, a horizontal screw centrifuge comprises a frame 1, a housing 2 arranged on the frame, a rotary drum 3 rotatably connected in the housing, a screw conveyor 4 positioned in the rotary drum and rotatably connected to the frame, a main motor 5 driving the rotary drum to rotate, and an auxiliary motor 6 driving the screw conveyor.

The drum 3 comprises a drum section cylindrical section 31 and a drum section conical dewatering section 32. An end ring 33 is provided at the end of the cylindrical section of the drum portion remote from the conical section of the drum portion. The end rings and the conveyor section cylindrical section form a liquid outlet 34 therebetween. And a separation liquid pool 35 is enclosed between the end ring and the rotary drum. The small diameter end of the conical section of the rotary drum part is provided with a slag discharge port 36. The slag discharge ports 36 are located on the circumferential surface of the drum.

The screw conveyor 4 comprises a conveyor section conical section 41 matched with the drum section conical dewatering section, a feeding bin 42 and a conveyor section cylindrical section 43 matched with the drum section cylindrical section, which are arranged in sequence, and the conveyor non-conical section and the conveyor non-cylindrical section are both of tubular structures. The feeding bin is provided with a discharging hole 421 and is connected with a feeding pipe 7 in a sealing and rotating way.

Referring to fig. 2, the feed pipe comprises an outer pipe 71 which is connected with the feed bin in a rotary sealing way and an inner pipe 72 which is connected with the outer pipe in a pluggable way. The inner end of the inner pipe is in sealing and abutting connection with the wall of the feeding bin.

Referring to fig. 1, the slag discharge is located between adjacent vanes 44 on the conical section of the conveyor section. A cone 422 protruding towards the feeding pipe is arranged in the feeding bin. The cone body and the feeding pipe are coaxial. The inlet end of the discharge hole is aligned with the peripheral surface of the cone. Both the conveyor section conical section 41 and the conveyor section cylindrical section 43 are tubular structures. The end of the cylindrical section of the conveyor section remote from the conical section of the conveyor section is provided with a drive shaft 45. The power output shaft of the auxiliary motor 6 is directly connected with the driving shaft through a coupling.

When the device is used, the main motor drives the rotary drum to rotate, the auxiliary motor drives the screw conveyor to rotate as required, suspension enters the rotary drum through the inner pipe of the feeding pipe, the storage bin and the discharge hole, then solid-liquid separation is carried out, solid is discharged from the slag discharge port, and liquid is discharged from the liquid outlet.

The second embodiment is different from the first embodiment in that: the end surface of the rotary drum is provided with a permanent magnet ring 37 and an annular connecting groove 311 extending along the circumferential direction of the rotary drum. The end ring 33 is provided with an annular flange 331. The annular flanging is inserted in the annular connecting groove. The end ring is fixed on the rotary drum by the permanent magnet ring in an adsorption way. An annular sealing ring 38 which is used for connecting the end ring and the rotary drum together in a sealing way is arranged between the outer peripheral surface of the annular flanging and the annular connecting groove. The frame 1 is provided with an electromagnet ring 11 separating the end ring from the drum. The frame is also provided with a guide rod 12. The end ring is provided with guide holes aligned to the guide bars. When the end ring is connected with the rotary drum in a sealing mode, the guide rods are disconnected with the guide holes, and the guide rods penetrate through the guide holes after the end ring is separated from the rotary drum. The wall of the cylindrical section of the conveyor section is provided with a number of water distribution holes 431. The cone of the feed magazine 42 extends through a through hole 423 forming a connection to the inner space of the cylindrical section of the conveyor section. The cylindrical section of the conveyor part is internally provided with a flexible air bag 8 for sealing the water distribution holes and the through holes. The flexible inflatable bag is provided with a clamping air bag 81 which extends into the feeding bin through the through hole and is communicated with the flexible inflatable bag. An air passage 451 for inflating and deflating the flexible inflatable bag is arranged in the driving shaft.

When solid-liquid separation is carried out, the flexible inflatable bag is in a swelling state to seal the through hole and the water distribution hole. When cleaning, input the washing liquid from the inlet tube, make flexible gas pocket gassing flat fall, the washing liquid flows through the water distribution hole and sprays the washing to spiral conveyer's main part and blade, and the abluent in-process still gives flexible gas pocket full gas repeatedly, plays the pressure that increases the washing liquid and flow from the water distribution hole during aerifing and passes through the cleaning performance. Still supply power for the electromagnet ring during washing, thereby the electromagnet ring through the end ring from the rotary drum absorb from making the rotary drum portion cylinder section of rotary drum be in full open-ended state (the separation liquid pond disappears), the liquid in the rotary drum can directly be discharged and to avoid the extrusion and influence clean effect.

Claims

1. A horizontal spiral centrifuge comprises a frame, a shell arranged on the frame, a rotary drum rotationally connected in the shell, a spiral conveyor rotationally connected on the frame and positioned in the rotary drum, a main motor driving the rotary drum to rotate and an auxiliary motor driving the spiral conveyor, wherein the rotary drum comprises a rotary drum part cylindrical section and a rotary drum part conical dehydration section, the spiral conveyor comprises a conveyor part conical section matched with the rotary drum part conical dehydration section, a feeding bin and a conveyor part cylindrical section matched with the rotary drum part cylindrical section which are sequentially arranged, the feeding bin is provided with a discharge hole and is hermetically connected with a feeding pipe, a slag discharge port is arranged at the small-diameter end of the rotary drum part conical section, the horizontal spiral centrifuge is characterized in that an end ring is arranged at one end of the rotary drum part cylindrical section far away from the rotary drum part conical section, a liquid outlet is formed between the end ring and the conveyor part cylindrical section, and a separation liquid pool is enclosed between the end, the feeding pipe comprises an outer pipe and an inner pipe, wherein the outer pipe is connected with the feeding bin in a rotating and sealing mode, and the inner pipe is connected in the outer pipe in a pluggable mode; the cylindrical section of the conveyor part is of a tubular structure, the wall of the cylindrical section of the conveyor part is provided with a plurality of water distribution holes, the feeding bin is provided with a through hole communicated with the inner space of the cylindrical section of the conveyor part, and the cylindrical section of the conveyor part is internally provided with a flexible inflatable bag for sealing the water distribution holes and the through hole.

2. The horizontal screw centrifuge of claim 1, wherein the slag discharge ports are located on the peripheral surface of the bowl between adjacent vanes on the conical section of the conveyor section.

3. The horizontal screw centrifuge of claim 1, wherein the end of the cylindrical conveyor section remote from the conical conveyor section is provided with a drive shaft, and the power output shaft of the auxiliary motor is directly connected with the drive shaft through a coupling.

4. The horizontal screw centrifuge of claim 1, wherein the feed bin has a cone projecting toward the feed tube, the cone and the feed tube are coaxial, and the inlet end of the discharge opening is aligned with the peripheral surface of the cone.

5. The horizontal screw centrifuge of claim 1, wherein the bowl has a permanent magnet ring, the end ring is attached to the end of the bowl via the permanent magnet ring, and the frame has an electromagnet ring separating the end ring from the bowl.

6. The horizontal spiral centrifuge as claimed in claim 5, wherein the end face of the drum is provided with an annular connecting groove extending along the circumferential direction of the drum, the end ring is provided with an annular flange, the annular flange is inserted into the annular connecting groove, and an annular sealing ring for sealing and connecting the end ring and the drum is arranged between the outer circumferential surface of the annular flange and the annular connecting groove.

7. The horizontal screw centrifuge of claim 1, wherein the flexible air bag is provided with a clamping air bag which extends into the feeding bin through a through hole and is communicated with the flexible air bag.

8. The horizontal screw centrifuge of claim 1 wherein the end of the cylindrical section of the conveyor section distal from the conical section of the conveyor section is provided with a drive shaft, the drive shaft having an air passage therein for inflating and deflating the flexible bladder.