CN110548605A - Pushing type centrifugal machine - Google Patents

Abstract

The invention discloses a pusher type centrifuge, which includes a machine base, a driving device, a composite oil cylinder assembly, a shaft and a bearing assembly, a drum assembly, and a casing assembly; the drum assembly includes a water retaining ring, a third-stage drum Above, there is a second-stage drum in the inner circle of the third-stage drum, and there is a first-stage drum in the inner circle of the second-stage drum, and there is a pusher disc in the inner circle of the first-stage drum, and the side end of the pusher disc There is a cloth opening on the circumference, and there is a centrifugal distributor on the circumference of the side end of the cloth opening. One end of the centrifugal distributor has a centrifugal mesh pressing ring, and the feeding pipe is inserted into the centrifugal mesh pressing ring; the first stage drum has a first There is a second-stage screen on the second-stage drum, and a third-stage screen on the third-stage drum; there is a first-stage pusher on the pushing plate, the first-stage drum, and the second-stage drum. Tablets, two-stage pushers and three-stage pushers. The invention provides a pusher type centrifuge, which is easy to use and maintain, and the unique design of the drum device makes the dehydration effect of the material good, can be applied to low-concentration suspensions, and has a long service life.

Description

A pusher centrifuge

technical field

The invention relates to a centrifuge, in particular to a pusher type centrifuge.

Background technique

A centrifuge is a machine that uses centrifugal force to separate components in a mixture of liquid and solid particles or liquid and liquid . The centrifuge is mainly used to separate the solid particles in the suspension from the liquid, or to separate two different densities and immiscible liquids in the emulsion (such as separating cream from milk); it can also be used to remove Liquid in wet solids, such as drying wet clothes with a washing machine; special ultra-speed tube separators can also separate gas mixtures of different densities; using the characteristics of different sedimentation speeds of solid particles of different densities or particle sizes in liquids, some sedimentation Centrifuges can also classify solid particles by density or size.

A pusher centrifuge is a continuously operating filter centrifuge. In the case of high-speed operation, the slurry is continuously fed in from the feed pipe, and flows along the inner wall of the feed hopper to the screen of the drum. The filtrate passes through the filter screen and is discharged continuously through the filtrate outlet, and the filter residue accumulated on the inner surface of the filter screen is pushed out along the inner wall of the drum by the reciprocating piston pusher.

In the prior art, the material of the pusher centrifuge has a narrow range of adaptation. When the material process changes or the feed concentration is too low, it will not be possible to use the pusher centrifuge to separate; The design of the drum device is mostly simple in structure, and the dehydration effect of the material is not good enough to meet the customer's requirements; therefore, it is urgent to develop a pusher type centrifuge to solve the above problems.

Contents of the invention

The purpose of the present invention is to solve the above problems. The present invention provides a pusher type centrifuge, which is ingeniously designed, easy to use and maintain, and the unique design of the drum device makes the dehydration effect of the material good. It can be applied to low-concentration suspensions and has a long service life. .

In order to achieve the above object, the technical solution adopted by the present invention is: it includes a machine base, a driving device is arranged on the machine base, and the driving device is connected with the first group of shafts and the bearing assembly through a composite oil cylinder assembly or a transmission device, and the first group of shafts and One end of the bearing assembly is movably provided with a drum assembly, and the outer periphery of the drum assembly is provided with a casing assembly; the drum assembly includes a water retaining ring connected with the first set of shafts and the bearing assembly, and the water retaining ring is movably arranged at the third stage of rotation. On the drum, there is a second-level drum in the inner circle of the third-level drum, a first-level drum in the inner circle of the second-level drum, and a movable set in the inner circle of the first-level drum. There is a pusher plate, and a distributing port is movable on the side circumference of the pusher disc, and a centrifugal distributor is arranged on the side circumference of the distributing port. The centrifugal distributor has a conical structure, and the inner side of the centrifugal distributor is provided with a centrifugal surface One end of the centrifugal distributor is provided with a centrifugal mesh pressure ring, and the feed pipe is inserted into the centrifugal mesh surface pressure ring; the first stage drum is equipped with a first stage screen, and the second stage drum grows out of the first stage. Part of the inner wall of the first-stage drum is provided with a second-stage screen, and part of the inner wall of the third-stage drum that grows beyond the second-stage drum is provided with a third-stage screen; the pushing plate, the first-stage drum and the second-stage The drum is respectively provided with a first-stage material pusher, a second-level material pusher and a third-level material pusher.

Further, the third-stage drum is in the shape of a straight cylinder, and the side end of the third-stage drum is movable with a drum hold-down ring, and a water retaining ring is arranged between the third-stage drum and the drum hold-down ring, and the drum hold-down ring The side end activities are provided with a scraper.

Further, the end of the third-stage drum near the feed pipe is inclined, and the side end of the third-stage drum is movable with a third-stage drum pressure ring.

Further, the driving device is configured as a hydraulic drive, and the hydraulic drive includes a motor, a coupling, an oil pump, a hydraulic valve and a pipeline connection assembly.

Further, the driving device is set as a mechanical drive, and the mechanical drive includes a motor reducer assembly, a transmission device, and a second set of shaft and bearing assemblies arranged on the base, and the second set of shaft and bearing assemblies is a mechanical shaft and bearing assembly.

Further, the pressure oil cylinder is provided with a cavity, the cavity is provided with a push shaft, the push shaft is provided with a push piston, and the push piston is H-shaped; the push piston is provided with a reversing sleeve , the push piston divides the cavity into a left pressure oil chamber and a right pressure oil chamber, the two ends of the push piston are respectively provided with a front piston disc and a rear piston disc, and the front piston disc and the rear piston disc are respectively provided with a second guide One end of the plunger and the first guide plunger, the second guide plunger and the first guide plunger are provided with a guide rod; one end of the pressure cylinder is provided with a pressure cylinder cover, and the side end of the rear piston disc is provided with a hydraulic nut, and the hydraulic nut It is arranged on the pusher shaft; the side end of the pressure cylinder head is provided with an oil inlet and outlet frame; the outer circumference of the oil inlet and outlet frame is provided with a pressure medium conveyor; the pressure medium conveyor is provided with a joint and an oil return connection; the oil return connection passes through The oil return plastic pipe communicates with the oil return pipe.

Further, the outer circumference of the oil inlet and outlet frame is provided with a front frame oil seal seat, a front medium conveyor seat, a rear medium conveyor seat and a front medium conveyor seat, and the front medium conveyor seat and the rear medium conveyor seat are connected with the oil inlet and outlet. There is a pressure medium conveyor in the connection of the frame; there is one pressure medium conveyor; a front spacer is set at the connection between the oil inlet and outlet frame and the oil seal seat of the front frame; the oil inlet and outlet frame is connected to the front medium conveyor seat and the rear medium conveyor seat A first bearing and a second bearing are respectively arranged at the joint; the side end of the pressure medium conveyer is arranged with a medium conveyer gland.

Further, the hydraulic nut includes a nut body, a piston is arranged on the nut body, and a semicircular gasket is arranged between the nut body and the piston; a threaded hole and a through-hole flow channel are arranged in the nut body.

Further, the first set of shaft and bearing assemblies includes a hollow shaft, the hollow shaft is respectively provided with a pusher shaft through the front pusher guide sleeve and the rear pusher guide sleeve, and the pusher shaft is respectively provided with a bearing seat through the front bearing and the rear bearing , the oil return pipe and the oil return pipe joint are arranged on the bearing seat; front spacer sleeves, front labyrinth rings, rear spacer sleeves, and rear labyrinth rings are arranged on both sides of the front bearing and rear bearing respectively, and sealing rings are arranged at the side ends of the front labyrinth rings ; There are throttling oil plugs and oil plugs in the middle and tail of the hollow shaft respectively.

Further, the casing assembly includes a casing, a collection tank is arranged inside the casing, a front cover is arranged on one side of the casing, and a door is arranged on the front cover; Tank flushing pipe, screen inner washing pipe and screen flushing pipe; the upper end of the casing is provided with a drum outer flushing pipe; the other side of the casing is provided with a rear shell, and the rear shell is provided with a rear The shell flushing pipe; the lower end of the casing is respectively provided with a liquid discharge port and a discharge port.

Beneficial effects of the present invention: the present invention provides a pusher type centrifuge, which is ingeniously designed, easy to use and maintain, and the unique design of the drum device firstly forms a filter cake in the centrifugal distributor, and then passes through the first stage filter screen, The second-stage filter and the third-stage filter are used for one-stage filtration and dehydration, so that the dehydration effect of the material is good, and it can be applied to low-concentration suspensions and has a long service life.

1. The centrifugal distributor in the present invention has a conical structure, and the filter cake formed by the solid phase on the centrifugal mesh surface will be very thin, and the centrifugal distributor will not block the material; it can thicken the low-concentration suspension, and the next step The process can form an effective filter cake.

2. In the present invention, one end of the third-stage drum is cylindrical, and the end near the feed pipe is designed to be inclined. The diameter of the third-stage drum is getting larger and larger, while the rotational speed is constant. Such a structural design will The larger the separation factor, the better the dehydration effect; the larger the diameter of the filter cake, the thinner the filter cake, the easier it is for water to pass through, and the better the dehydration effect, which reduces the follow-up cost for the enterprise.

3. The washing pipe in the screen of the present invention is cleaned by adding liquid while washing and pushing the material, which has good cleaning effect and high efficiency, and reduces the follow-up cost for the enterprise.

4. The screen flushing pipe of the present invention fully cleans all the screens after shutdown, and has good cleaning effect and high efficiency.

5. When the driving device of the present invention is driven by hydraulic pressure, it is composed of a motor, a coupling, an oil pump and a pipeline connection assembly. The oil in the oil pump enters the composite oil cylinder assembly, and the reversing sleeve and the composite oil cylinder assembly are switched through the composite oil cylinder assembly. The passage of the pusher piston, and then push the piston assembly to one end, so as to drive the pusher shaft to reciprocate, so as to realize the independent reversing of the piston, and drive the pusher shaft to move left and right. The structure is simple, the design is ingenious, and the use and maintenance are convenient and reliable. It has the advantages of strong resistance, easy processing and long service life.

7. The present invention locks the piston on the pusher shaft through the hydraulic nut. After locking, the oil is injected through the threaded hole and the through-hole flow channel until the gap between the nut body and the piston is just the thickness of the semicircular gasket. It cannot rebound, and the locking effect is good to prevent loosening.

8. When the driving device of the present invention is mechanically driven, it is realized by using a motor to drive a reducer and then drive a crank rocker assembly, wherein the reducer is a general-purpose mechanical device, which is convenient to purchase and maintain; the crank rocker assembly is mainly composed of a left eccentric wheel , the right eccentric wheel and the shift fork, the reducer drives the left eccentric wheel and the right eccentric wheel to rotate at the same speed, which is equivalent to the constant speed rotation of the crank, and the rotation of the left eccentric wheel and the right eccentric wheel drives the fork to reciprocate, which is equivalent to the rocker For reciprocating motion, the crank has a rocker assembly with a simple structure, which is simpler in structure and lower in manufacturing and maintenance costs; a guide key is arranged between the pusher shaft and the hollow shaft, and when the pusher bearing assembly drives the pusher shaft to reciprocate , the guide key can make the pusher shaft slide in the hollow shaft according to the path of the guide key, so that the pusher shaft can be positioned and guided in the main shaft.

Description of drawings

Figure 1 is a front view of the structure of the present invention (hydraulic drive).

Fig. 2 is a structural schematic diagram of the drum assembly in the structure of the present invention (the third-stage screen is cylindrical).

Fig. 3 is a structural schematic diagram of the drum assembly in the structure of the present invention (one end of the third-stage screen is cylindrical and the other end is conical).

Fig. 4 is a structural schematic diagram of the shaft and bearing assembly in the structure of the present invention.

Fig. 5 is a structural schematic diagram of the composite oil cylinder assembly in the structure of the present invention.

Fig. 6 is a schematic structural diagram of the hydraulic nut in Fig. 5 .

Figure 7 is a front view of the housing assembly in the structure of the present invention.

Figure 8 is a side view of the housing assembly in the configuration of the present invention.

Fig. 9 is a front view of the structure of the present invention (mechanical drive).

Fig. 10 is a top view of the driving device of the present invention when it is mechanically driven.

The text marked in the figure is expressed as: 1. Machine base; 2. Drum assembly; 3. The first set of shaft and bearing assembly; 4. Composite oil cylinder assembly; 5. Hydraulic drive; 6. Cover assembly; 2-1 , water retaining ring; 2-2, third-stage drum; 2-3, push rod sealing pressure ring; 2-4, second-stage drum; 2-5, first-stage drum; 2-6, first-stage Level pushing piece; 2-7, pushing plate; 2-8, cloth opening; 2-9, centrifugal distributor; 2-10, first-level screen; 2-11, second-level pushing piece; 2- 12. Centrifugal surface net; 2-13, second-level screen; 2-14, third-level pusher; 2-15, third-level screen; 2-16, water retaining ring; 2-17, scraper; 2-18, drum press ring; 2-19, centrifugal mesh surface press ring; 2-20 feed pipe; 2-21, three-stage drum press ring; 3-1, rear spacer sleeve; 3-2, rear Labyrinth ring; 3-3, pusher shaft; 3-4, hollow shaft; 3-5, bearing seat; 3-6, rear bearing; 3-7, front spacer sleeve; 3-8, front labyrinth ring; 3- 9. Seal ring; 3-10, throttle oil plug; 3-11, front bearing; 3-12, oil plug; 3-13, oil return pipe joint; 3-14, second oil return pipe; 3-15, rear Push material guide sleeve; 3-16, front push material guide sleeve; 4-1, medium conveyor gland; 4-2, rear medium conveyor seat; 4-3, front medium conveyor seat; 4-4, front Skeleton oil seal seat; 4-5, rear piston disc; 4-6, second guide plunger; 4-7, pusher piston; 4-8, reversing sleeve; 4-9, front piston disc; 4-10 , the second bearing; 4-11, the pressure cylinder; 4-12, the guide rod; 4-13, the pressure medium conveyor; 4-14, the first guide plunger; 4-15, the pressure cylinder cover; 4-16, Oil return plastic pipe; 4-17, first oil return pipe; 4-18, front spacer; 4-19, oil inlet and outlet frame; 4-20, oil return connection; 4-21, joint; 4-22, hydraulic nut ;4-23, the first bearing; 4-24, right pressure oil chamber; 4-25, channel Ⅰ; 4-26, oil inlet channel Ⅱ; 4-27, pressure oil chamber; 4-28, channel Ⅱ; 4 -29, channel Ⅲ; 4-30, left pressure oil chamber; 4-31, channel Ⅳ; 4-32, bolt; 4-33, oil inlet chamber; 4-34, channel Ⅴ; 4-36, oil return hole ;4-37, oil saving hole; 4-38, oil inlet channel Ⅰ; 4-22-01, nut body; 4-22-02, semicircular gasket; 4-22-03, piston; 4-22- 04. Threaded hole; 4-22-05. Through hole flow channel; 5-1. Motor; 5-2. Coupling; 6-1. Elbow; 6-2. Back shell flushing pipe; 6-3 , rear shell plate; 6-4, collecting tank flushing pipe; 6-5, washing pipe inside the screen; 6-6, casing; 6-7, screen washing pipe; 6-8, collecting tank; 6 -9, feeding pipe; 6-10, front cover; 6-11, door; 6-12, washing pipe outside the drum; 6-13, discharge port; 6-14, drain port; 7, motor reduce Speed machine assembly; 8, transmission device; 100, drive device; 200, second set of shaft and bearing assembly.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. .

As shown in Fig. 1-Fig. 8, the specific structure of the present invention is: it comprises machine base 1, is provided with driving device 100 on machine base 1, and driving device 100 is connected with the first set of shafts and The bearing assembly 3 is connected, the first group of shafts and one end of the bearing assembly 3 are movably provided with a drum assembly 2, and the outer periphery of the drum assembly 2 is provided with a casing assembly 6; The connected water retaining ring 2-1, the water retaining ring 2-1 is movable and set on the third-stage drum 2-2, and the inner circumference of the third-stage drum 2-2 is moved through the push rod sealing pressure ring 2-3 A second-stage drum 2-4 is provided, and a first-stage drum 2-5 is provided for activities in the inner circumference of the second-stage drum 2-4, and a first-stage drum 2-5 is provided for activities in the inner circumference of the first-stage drum 2-5. Pushing disc 2-7, the side end circumference of pushing material disc 2-7 is provided with distributing port 2-8, and the side end circumference of distributing port 2-8 is provided with centrifugal distributing device 2-9, centrifugal distributing device 2 -9 has a conical structure, the inner side of the centrifugal distributor 2-9 is provided with a centrifugal surface net 2-12, one end of the centrifugal distributor 2-9 is provided with a centrifugal mesh pressure ring 2-19, and the feed pipe 6-9 Interspersed in the centrifugal mesh pressure ring 2-19; the first-stage drum 2-5 is provided with a first-stage screen 2-10, and the second-stage drum 2-4 grows out of the first-stage drum 2-5 Part of the inner wall is provided with a second-stage screen 2-13, and the part of the third-stage drum 2-2 that grows beyond the second-stage drum 2-4 is provided with a third-stage screen 2-15; -7. The first-stage drum 2-5 and the second-stage drum 2-4 are respectively provided with a first-stage material pusher 2-6, a second-stage material pusher 2-11 and a third-stage material pusher 2-14.

Further, the third-stage drum 2-2 is cylindrical, and the side end of the third-stage drum 2-2 is movable to be provided with a drum press ring 2-18, and the third-stage drum 2-2 and the drum press ring are movable. A water-retaining ring 2-16 is arranged between the rings 2-18, and a scraper 2-17 is provided on the movable side of the drum pressing ring 2-18. The scraper 2-17 scrapes off the filter cake on the collecting tank 6-8 and discharges it outside the machine from the tangential outlet 6-13.

Further, one end of the third-stage drum 2-2 is cylindrical, and the other end is conical at the end close to the feed pipe 6-9. Drum pressure ring 2-21. When the end of the third-stage drum 2-2 near the feed pipe 6-9 is conical, there is no scraper on the pressure ring 2-21 of the third-stage drum, and there is no collecting tank 6-8 on the cover assembly 6, and the filter The cake is pushed out from the drum during the pushing process, squeezed into the casing and finally falls naturally. The diameter of the third-stage drum 2-2 here is getting bigger and bigger, while the rotating speed is constant. This kind of structural design will make the separation factor bigger and bigger, and the dehydration effect will be better; The thinner it is, the easier it is for water to permeate, and the better the dehydration effect is, which reduces the follow-up cost for the enterprise.

Further, the driving device 100 is configured as a hydraulic drive 5, and the hydraulic drive 5 includes a motor 5-1, a coupling 5-2, an oil pump, a hydraulic valve and a pipeline connection assembly.

Further, the driving device 100 is configured as a mechanical drive, and the mechanical drive includes a motor reducer assembly 7, a transmission device 8, and a second shaft and bearing assembly 200 arranged on the base 1, and the second shaft and bearing assembly 200 is a mechanical shaft and bearing assemblies. The working principle and process of the motor reducer assembly 7, the transmission device 8, and the mechanical shaft and bearing assembly are described in the patent number 201821159789.5, which is called the pusher driving device for a mechanical pusher centrifuge. The application date is 2018.07.20, and the publication date is 2019.03. 15. The reciprocating motion of the pusher driving device of the mechanical pusher centrifuge is realized by the motor driving the reducer and then driving the crank rocker assembly. The crank rocker assembly is mainly composed of a left eccentric wheel, a right eccentric wheel and a shift fork. The reducer drives the left The eccentric wheel and the right eccentric wheel rotate at the same speed, which is equivalent to the constant speed rotation of the crank. The rotation of the left eccentric wheel and the right eccentric wheel drives the fork to reciprocate, which is equivalent to the reciprocating motion of the rocker; There is a guide key, when the pusher bearing assembly drives the pusher shaft to reciprocate, the guide key can make the pusher shaft slide in the hollow shaft according to the path of the guide key, so that the pusher shaft can be positioned and guided in the main shaft.

Further, the pressure oil cylinder 4-11, the pressure oil cylinder 4-11 is provided with a cavity, the cavity is provided with a pusher shaft 3-3, and the pusher shaft 3-3 is provided with a pusher piston 4-7, The piston 4-7 is H-shaped; the push piston 4-7 is provided with a reversing sleeve 4-8, and the push piston 4-7 divides the cavity into a left pressure oil chamber 4-30 and a right pressure oil chamber 4- 24. The two ends of the pushing piston 4-7 are respectively provided with a front piston disc 4-9 and a rear piston disc 4-5, and the front piston disc 4-9 and the rear piston disc 4-5 are respectively provided with a second guide plunger 4-6 and the first guide plunger 4-14, one end of the second guide plunger 4-6 and the first guide plunger 4-14 is provided with a guide rod 4-12; one end of the pressure cylinder 4-11 is provided with a pressure Oil cylinder cover 4-15, the side end of rear piston disc 4-5 is provided with hydraulic nut 4-22, and hydraulic nut 4-22 is arranged on the pushing shaft 3-3; The side end of pressure oil cylinder cover 4-15 is provided with access The oil frame 4-19; the outer circumference of the oil inlet and outlet frame 4-19 is provided with a pressure medium conveyor 4-13; the pressure medium conveyor 4-13 is provided with a joint 4-21 and an oil return joint 4-20; The connecting pipe 4-20 communicates with the first oil return pipe 4-17 through the oil return plastic pipe 4-16.

Further, the outer circumference of the oil inlet and outlet frame 4-19 is sequentially provided with a front frame oil seal seat 4-4, a front medium conveyor seat 4-3, a rear medium conveyor seat 4-2 and a front medium conveyor seat 4-3 , there is a pressure medium conveyor 4-13 in the connection between the front medium conveyor seat 4-3 and the rear medium conveyor seat 4-2 and the oil inlet and outlet frame 4-19; there are two pressure medium conveyors 4-13; A front spacer 4-18 is provided at the connection between the oil inlet and outlet frame 4-19 and the front frame oil seal seat 4-4; the oil inlet and outlet frame 4-19 is connected with the front medium conveyor seat 4-3 and the rear medium conveyor seat 4-2 The first bearing 4-23 and the second bearing 4-10 are arranged respectively at the positions; the side end of the pressure medium conveyor 4-13 is provided with a medium conveyor gland 4-1. .

Further, the hydraulic nut 4-22 includes a nut body 4-22-01, the nut body 4-22-01 is provided with a piston 4-22-03, and the nut body 4-22-01 and the piston 4-22-03 A semicircular gasket 4-22-02 is provided; a threaded hole 4-22-04 and a through hole flow channel 4-22-05 are provided in the nut main body 4-22-01. First, the pusher piston 4-7 is locked on the pusher shaft 3-3 through the hydraulic nut 4-22. After locking, the oil is injected through the threaded hole 4-22-04 and the through hole flow channel 4-22-05. In the nut main body 4-22-01, hit until the gap between the nut main body 4-22-01 and the piston 4-22-03 is just the thickness of the semicircular gasket 4-22-02, so that it cannot rebound and the locking effect is good , to prevent loosening.

Further, the first set of shaft and bearing assembly 3 includes a hollow shaft 3-4, and the hollow shaft 3-4 is respectively provided with a push shaft 3-3 through the front push guide sleeve 3-16 and the rear push guide sleeve 3-15. , the pusher shaft 3-3 is provided with a bearing seat 3-5 through the front bearing 3-11 and the rear bearing 3-6 respectively, and the oil return pipe 3-14 and the oil return pipe joint 3-13 are arranged on the bearing seat 3-5; Both sides of front bearing 3-11 and rear bearing 3-6 are respectively provided with front spacer cover 3-7, front labyrinth ring 3-8 and rear spacer cover 3-1, back labyrinth ring 3-2, front labyrinth ring 3- The side end of 8 is provided with sealing ring 3-9; The middle part and tail part of hollow shaft 3-4 are respectively provided with throttling oil plug 3-10 and oil plug 3-12.

Further, the casing assembly 6 includes a casing 6-6, a collecting tank 6-8 is arranged inside the casing 6-6, a front cover 6-10 is arranged on one side of the casing 6-6, and the front cover 6 -10 is provided with a door 6-11; the front cover 6-10 is respectively interspersed with a feed pipe 6-9, a collecting tank flushing pipe 6-4, a screen inner washing pipe 6-5 and a screen flushing pipe 6 -7; the upper end of the casing 6-6 is provided with a drum outer flushing pipe 6-12; the other side of the casing 6-6 is provided with a rear shell plate 6-3, and the elbow 6 passes through the rear shell plate 6-3 -1 is provided with a rear shell flushing pipe 6-2; the lower end of the casing 6-6 is respectively provided with a liquid discharge port 6-14 and a discharge port 6-13. There are 3 washing pipes 6-5 in the screen, and the washing pipes 6-5 in the screen are cleaned by adding liquid while washing while pushing materials, and the cleaning effect is good and the efficiency is high, which reduces the follow-up cost for the enterprise. The screen washing pipes 6-7 fully clean all the screens after the shutdown, and the cleaning effect is good and the efficiency is high.

The working principle of the machine: after the drum assembly 2 starts to rotate at full speed, the suspension is fed into the centrifugal distributor 2-9 installed on the push plate 2-7 through the feeding pipe 6-9, and under the action of centrifugal force, Most of the liquid is thrown out of the drum through the gaps of the centrifugal surface net 2-12 and the wall holes of the centrifugal distributor 2-9, while the solid phase forms a filter cake on the centrifugal distributor 2-9, when the first stage drum 2-5 During the return trip, the filter cake is relatively moved forward along the drum axis for a certain distance, and when the first-stage drum 2-5 progresses, the vacated screen surface is filled with suspension liquid continuously, forming a new filter cake. The filter cake formed due to the continuous reciprocating motion of the pushing disc 2-7 is continuously pushed forward along the drum axis, to the second stage drum 2-4, and further dried. The filter cake breaks away from the second-stage drum 2-4 and enters the third-stage drum 2-2. The filter cake is loosely redistributed on the third-stage screen 2-15 and continuously pushed out. Finally, the filter cake is pushed out of the drum and enters the In the collecting tank, the filter cake is discharged out of the machine from the tangential discharge port 6-13 through the scraper 2-17 installed on the third-stage drum 2-2. The filtrate and washing liquid are discharged through the drain port 6-14. When the driving device is hydraulically driven 5, the rotation of the drum assembly 2 is driven by the driving device 5, and the reciprocating motion of the first stage drum 2-5 is realized by the driving device 5 through the composite oil cylinder assembly 4, and the driving device 5 is driven by the motor 5 -1. Coupling 5-2, oil pump and pipeline connection components. The oil in the oil pump is divided into two groups through the distribution valve and the oil pipe. The hydraulic oil provided by the hydraulic system is injected into 2 pressure mediums through 2 joints 4-21 for delivery In the device 4-13, the hydraulic oil enters the two passages I4-25 by the pressure medium conveyor 4-13, and then enters the pressure oil chamber 4-27 through the oil inlet passage II4-26, so that the pressure oil chamber 4 The -27 is continuously filled with high-pressure oil. At this time, the first guide plunger 4-14 makes the pressure oil chamber 4-27 communicate with the oil inlet chamber 4-33 of the reversing sleeve 4-8, and the second guide plunger 4-6 makes the reversing sleeve 4 The oil return cavity of -8 communicates with the oil return hole 4-36 of the pusher shaft 3-3 through passage V4-34, so that the reversing sleeve 4-8 is moved to the right. Due to the rightward movement of the reversing sleeve 4-8, the pressure oil in the pressure oil chamber 4-27 passes through the oil saving hole 4-37 and the oil inlet channel I4-38 of the push piston 4-7 and the push piston 4- The cavities of the left pressure oil chamber 4-30 of 7 are connected, because the rear piston disc 4-5, the pusher piston 4-7, and the front piston disc 4-9 are connected by two bolts 4-32 to form a piston assembly. And the piston assembly is connected on the pusher shaft 3-3 through the hydraulic nut 4-22, so after the left pressure oil chamber 4-30 of the rear piston disc 4-5 injects pressure oil, the rear piston disc 4-5, the pusher piston 4-7. The front piston plate 4-9 moves to the right together with the hydraulic nut 4-22 and the pusher shaft 3-3, and the pressure oil in the right pressure oil chamber 4-24 of the piston will pass through the channels Ⅱ4-28 and Ⅲ4 -29. Passage IV 4-31 returns to the oil return hole 4-36 of the pusher shaft 3-3. At this time, the process of the piston assembly driving the pusher shaft 3-3 to the left is completed. When the piston assembly is pushed to the rightmost end When the end face of the front piston disc 4-9 touches the end face of the pressure oil cylinder 4-11, the first guide plunger 4-14 and the second guide plunger 4-6 will switch the forward and backward direction of the reversing sleeve 4-8. Oil return direction, thereby all switches the left and right direction of piston assembly, oil return direction, realizes that piston assembly moves to the left, and drives pushing material shaft 3-3 to move to the left together. Reciprocating in this way realizes the independent reversing of the piston assembly, driving the pusher shaft to push in 3-3 pulses.

It should be noted that, in this document, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus.

In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above examples is only used to help understand the method and core idea of the present invention. The above is only a preferred embodiment of the present invention. It should be pointed out that due to the limitation of literal expression, there are objectively unlimited specific structures. Under these circumstances, several improvements, modifications or changes can also be made, and the above-mentioned technical features can also be combined in an appropriate manner; these improvements, modifications, or combinations, or the idea and technical solution of the invention can be directly applied to other occasions without improvement should be regarded as the protection scope of the present invention.

Claims (10)

1. A pusher centrifuge comprises a base (1), and is characterized in that a driving device (100) is arranged on the base (1), the driving device (100) is connected with a first group of shafts and bearing assemblies (3) through a composite oil cylinder assembly (4) or a transmission device (8), one end of each first group of shafts and bearing assemblies (3) is movably provided with a rotary drum assembly (2), and the periphery of each rotary drum assembly (2) is provided with a housing assembly (6); the drum component (2) comprises a water retaining ring (2-1) connected with a first group of shafts and a bearing component (3), the water retaining ring (2-1) is movably arranged on a third-stage drum (2-2), a second-stage drum (2-4) is movably arranged in the inner periphery of the third-stage drum (2-2), a first-stage drum (2-5) is movably arranged in the inner periphery of the second-stage drum (2-4), a material pushing disc (2-7) is movably arranged in the inner periphery of the first-stage drum (2-5), a material distribution port (2-8) is movably arranged on the circumference of the side end of the material pushing disc (2-7), a centrifugal material distributor (2-9) is arranged on the circumference of the side end of the material distribution port (2-8), the centrifugal material distributor (2-9) is of a conical structure, a centrifugal surface net (2-12) is arranged on the inner side of the centrifugal material distributor (2-9), one end of the centrifugal distributing device (2-9) is provided with a centrifugal net surface pressing ring (2-19), and the feeding pipe (6-9) is inserted into the centrifugal net surface pressing ring (2-19); a first-stage screen (2-10) is arranged on the first-stage rotary drum (2-5), a second-stage screen (2-13) is arranged on the part of the inner wall of the second-stage rotary drum (2-4) which extends out of the first-stage rotary drum (2-5), and a third-stage screen (2-15) is arranged on the part of the inner wall of the third-stage rotary drum (2-2) which extends out of the second-stage rotary drum (2-4); the material pushing disc (2-7), the first-stage rotary drum (2-5) and the second-stage rotary drum (2-4) are respectively provided with a first-stage material pushing sheet (2-6), a second-stage material pushing sheet (2-11) and a third-stage material pushing sheet (2-14).

2. The pusher centrifuge as defined in claim 1, wherein the third stage drum (2-2) is in a shape of a straight cylinder, a drum pressing ring (2-18) is movably disposed at the side end of the third stage drum (2-2), a water retaining ring (2-16) is disposed between the third stage drum (2-2) and the drum pressing ring (2-18), and a scraper (2-17) is movably disposed at the side end of the drum pressing ring (2-18).

3. The pusher centrifuge as defined in claim 1, wherein the end of the third drum (2-2) close to the inlet pipe (6-9) is conical, and the side end of the third drum (2-2) is movably provided with a third drum pressing ring (2-21).

4. A pusher centrifuge according to claim 1, characterised in that the drive (100) is arranged as a hydraulic drive (5), the hydraulic drive (5) comprising a motor (5-1), a coupling (5-2), an oil pump, a hydraulic valve and a conduit connection assembly.

5. A pusher centrifuge according to claim 1, c h a r a c t e r i z e d in that the drive means (100) is arranged as a mechanical drive comprising a motor reducer assembly (7), a transmission (8) and a second set of shaft and bearing assemblies (200) arranged on the frame (1), the second set of shaft and bearing assemblies (200) being mechanical shaft and bearing assemblies.

6. The pusher centrifuge as defined in claim 1, wherein the pressure cylinder (4-11), the pressure cylinder (4-11) is provided with a cavity, the cavity is provided with a pusher shaft (3-3), the pusher shaft (3-3) is provided with a pusher piston (4-7), and the pusher piston (4-7) is in an H shape; a reversing sleeve (4-8) is arranged in the pushing piston (4-7), the pushing piston (4-7) divides the cavity into a left pressure oil cavity (4-30) and a right pressure oil cavity (4-24), two ends of the pushing piston (4-7) are respectively provided with a front piston disc (4-9) and a rear piston disc (4-5), the front piston disc (4-9) and the rear piston disc (4-5) are respectively provided with a second guide plunger (4-6) and a first guide plunger (4-14), and one ends of the second guide plunger (4-6) and the first guide plunger (4-14) are provided with a guide rod (4-12); one end of the pressure oil cylinder (4-11) is provided with a pressure oil cylinder cover (4-15), the side end of the rear piston disc (4-5) is provided with a hydraulic nut (4-22), and the hydraulic nut (4-22) is arranged on the material pushing shaft (3-3); the side ends of the pressure oil cylinder covers (4-15) are provided with oil inlet and outlet frameworks (4-19); the outer circumference of the oil inlet and outlet frame (4-19) is provided with a pressure medium conveyor (4-13); the pressure medium conveyor (4-13) is provided with a joint (4-21) and an oil return connecting pipe (4-20); the oil return connecting pipe (4-20) is communicated with the first oil return pipe (4-17) through an oil return plastic pipe (4-16).

7. The pusher centrifuge as claimed in claim 6, wherein the outer circumference of the oil inlet and outlet frame (4-19) is sequentially provided with a front frame oil seal seat (4-4), a front medium conveyer seat (4-3), a rear medium conveyer seat (4-2) and a front medium conveyer seat (4-3), and a pressure medium conveyer (4-13) is arranged in the joint of the front medium conveyer seat (4-3) and the rear medium conveyer seat (4-2) with the oil inlet and outlet frame (4-19); 2 pressure medium conveyors (4-13) are arranged; a front spacer bush (4-18) is arranged at the joint of the oil inlet and outlet framework (4-19) and the front framework oil seal seat (4-4); a first bearing (4-23) and a second bearing (4-10) are respectively arranged at the connection part of the oil inlet and outlet framework (4-19) and the front medium conveyer base (4-3) and the rear medium conveyer base (4-2); a medium conveyor gland (4-1) is arranged at the side end of the pressure medium conveyor (4-13).

8. The pusher centrifuge as defined in claim 6, wherein the hydraulic nut (4-22) comprises a nut body (4-22-01), a piston (4-22-03) is arranged on the nut body (4-22-01), and a semicircular gasket (4-22-02) is arranged between the nut body (4-22-01) and the piston (4-22-03); the nut main body (4-22-01) is internally provided with a threaded hole (4-22-04) and a through hole flow passage (4-22-05).

9. The pusher centrifuge of claim 1, wherein the first set of shaft and bearing assembly (3) comprises a hollow shaft (3-4), the hollow shaft (3-4) is provided with a pusher shaft (3-3) through a front pusher guide sleeve (3-16) and a rear pusher guide sleeve (3-15), respectively, the pusher shaft (3-3) is provided with a bearing seat (3-5) through a front bearing (3-11) and a rear bearing (3-6), respectively, the bearing seat (3-5) is provided with a second oil return pipe (3-14) and an oil return pipe joint (3-13); a front spacing sleeve (3-7), a front labyrinth ring (3-8), a rear spacing sleeve (3-1) and a rear labyrinth ring (3-2) are respectively arranged on two sides of the front bearing (3-11) and the rear bearing (3-6), and a sealing ring (3-9) is arranged at the side end of the front labyrinth ring (3-8); the middle part and the tail part of the hollow shaft (3-4) are respectively provided with a throttling oil plug (3-10) and an oil plug (3-12).

10. The pusher centrifuge as defined in claim 1, wherein the housing assembly (6) comprises a housing (6-6), a material collecting groove (6-8) is provided in the housing (6-6), a front cover plate (6-10) is provided at one side of the housing (6-6), and a door (6-11) is provided on the front cover plate (6-10); a feed pipe (6-9), a collecting groove flushing pipe (6-4), a screen mesh inner washing pipe (6-5) and a screen mesh flushing pipe (6-7) are respectively inserted in the front cover plate (6-10); the upper end of the machine shell (6-6) is provided with a drum outer washing pipe (6-12); the other side of the casing (6-6) is provided with a rear casing plate (6-3), and the rear casing plate (6-3) is provided with a rear casing plate flushing pipe (6-2) through an elbow (6-1); the lower end of the casing (6-6) is respectively provided with a liquid outlet (6-14) and a discharge port (6-13).