CN211678266U

CN211678266U - Closed bag-turning discharging centrifuge

Info

Publication number: CN211678266U
Application number: CN201922489172.0U
Authority: CN
Inventors: 陈志才
Original assignee: SUZHOU SHENGTIANLI CENTRIFUGE MANUFACTURING CO LTD
Current assignee: SUZHOU SHENGTIANLI CENTRIFUGE MANUFACTURING CO LTD
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-16
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a closed bag-turning discharging centrifugal machine, which comprises a base, a bearing seat and a main shaft, wherein the main shaft is connected with a conical crown, a rotary drum bottom plate and a rotary basket, the base is connected with a driving motor for driving the main shaft to rotate, the upper end of the rotary basket is connected with a filter bag upper positioning ring, the periphery of the rotary basket is provided with a middle shell, the upper end of the conical crown is connected with a positioning shaft, the positioning shaft is sleeved with a sliding lifting pipe, the outer part of the sliding lifting pipe is sleeved with a lifting sleeve, the periphery of the middle shell is provided with an outer shell, the top of the outer shell is connected with a top cover, the top cover is inserted with a sliding positioning sleeve, the lifting sleeve is inserted in the sliding positioning sleeve, the outer shell is connected with a lifting driving rod for driving the lifting sleeve to lift, the lower end of the, the lower port of the filter bag is clamped in the lower positioning groove of the filter bag of the lower positioning ring of the filter bag. The utility model discloses need not uncap can follow upper portion automatic discharge.

Description

Closed bag-turning discharging centrifuge

The technical field is as follows:

the utility model relates to a centrifuge, especially a closed bag centrifuge of unloading that turns over.

Background art:

the hanging bag centrifuge discharges from the upper part, so that the hanging bag centrifuge has the advantages of complete discharging, no residual filter cake, simple structure, simple installation, convenient use and maintenance and the like, is popular with users, and is widely applied and popularized. However, the punching bag centrifuge has the disadvantages that the cover must be opened and closed every time the punching bag centrifuge unloads, the operation is complicated, and the air leakage and the falling of the materials onto the ground during the unloading process pollute the environment, so the application range of the punching bag centrifuge is still greatly limited.

In view of the above technical problems, there is a need to develop a centrifuge capable of automatically discharging materials from the top, but cleaning the materials without opening the cover, so as to keep the workshop environment clean and sanitary.

The utility model has the following contents:

the utility model discloses the technical problem who at first will solve is: provides a closed bag-turning and discharging centrifuge which can automatically discharge from the upper part without opening a cover.

In order to solve the technical problem, the utility model discloses a technical scheme is: a closed bag-turning discharging centrifugal machine comprises a base and a bearing seat connected to the base, wherein a main shaft is rotationally connected in the bearing seat, a conical crown is connected at the upper end of the main shaft, an annular rotary drum bottom plate is connected at the lower edge of the conical crown, a rotary basket coaxially arranged with the main shaft is vertically connected at the outer edge of the rotary drum bottom plate, a driving motor for driving the main shaft to rotate is connected to the base, a large number of filter holes are formed in the rotary basket, a filter bag upper positioning ring is connected to the upper end of the rotary basket, a filter bag upper positioning groove is formed in the upper end surface of the filter bag upper positioning ring, an intermediate shell is arranged at the periphery of the rotary basket, the lower end of the intermediate shell is hermetically connected with the upper plane of the base, a liquid storage cavity capable of containing filtrate is formed by the upper plane of the, the upper end of the annular cover plate is not higher than the upper end of the positioning ring on the filter bag, the inner circumferential surface of the annular cover plate is close to the outer circumferential surface of the positioning ring on the filter bag, the upper end of the conical cap top is fixedly connected with a positioning shaft which is coaxially arranged with the main shaft, the positioning shaft is sleeved with a sliding lifting pipe, the positioning shaft is provided with a first guide groove which extends axially, the inner wall of the sliding lifting pipe is fixedly connected with a guide key which is inserted in the first guide groove in a sliding manner, the outer part of the sliding lifting pipe is sleeved with a lifting sleeve, the top end of the sliding lifting pipe is rotatably connected with the top end of the lifting sleeve through a bearing, the sliding lifting pipe is axially fixed relative to the lifting sleeve, the periphery of the middle shell is provided with an outer shell, the lower end of the outer shell is fixedly connected with the upper plane of the base, the top of the, the upper end of the lifting sleeve extends out of the top cover and the sliding positioning sleeve, a lifting driving rod parallel to the main shaft is connected to a base on one side of the outer shell, the head of a piston rod of the lifting driving rod is connected with a crossbeam extending towards the lifting sleeve, the upper end of the lifting sleeve is fixedly connected with the crossbeam, the lower end of the sliding lifting pipe extends out of the lifting sleeve downwards, the lower end of the sliding lifting pipe is connected with a horn-shaped filter cake bottom plate buckled on the conical cap top and the rotary drum bottom plate, the bottom surface of the outer edge of the filter cake bottom plate is close to the upper surface of the rotary drum bottom plate, the outer edge of the filter cake bottom plate is connected with a lower filter bag positioning ring, the outer diameter of the lower filter bag positioning ring is smaller than the inner diameter of the rotary basket, a lower filter bag positioning groove is arranged on the rotary basket, many support columns have been gone up to the circumference equipartition on the filter cake bottom plate, and many support columns upper ends are connected with an annular and block the liquid board, and the external diameter that blocks the liquid board is greater than the internal diameter of holding ring on the filter bag, highly satisfying of support column is when the slip fall way descends to the extreme low position, blocks the liquid board lower surface and just with the holding ring upper surface subsides on the filter bag and connect, the lifting cover highly satisfying of top cap below is located the slip locating sleeve all the time at the in-process lift cover of unloading, the discharge opening has been seted up on the shell.

As a preferred scheme, an annular guide plate is obliquely connected inside the outer shell, the lower edge of the guide plate is connected with the discharge opening, the inner edge of the guide plate is hermetically connected with the outer wall of the middle shell, and the outer edge of the guide plate is hermetically connected with the inner wall of the outer shell.

Preferably, a discharge pipe extending obliquely downwards is connected to the discharge opening, and a closable door is connected to the outer end of the discharge pipe.

As a preferred scheme, the outer edge of the upper end of the positioning ring on the filter bag is connected with a check ring, the check ring is positioned above the annular cover plate, and the outer diameter of the check ring is between the inner diameter and the outer diameter of the annular cover plate.

As a preferred scheme, a liquid outlet communicated with the liquid storage cavity is formed in the base, a liquid discharge pipe communicated with the outside is connected to the liquid outlet, and a liquid discharge valve is arranged on the liquid discharge pipe.

Preferably, the annular cover plate is a conical ring with a small upper opening and a large lower opening.

Preferably, a section of second guide groove extending obliquely upwards is further connected to the upper end of the first guide groove.

The utility model has the advantages that: the utility model discloses a set up the filter cake bottom plate in the rotary drum, the rising through the filter cake bottom plate drives the filter bag down along rising and with the filter bag upset, utilize the material dead weight along the filter cake bottom plate between middle casing and the shell body of gliding, the rethread discharge opening is unloaded, whole discharge process, the top cap of shell body need not be opened, the process of unloading is all accomplished inside the shell body, and still follow the basket upper shed ejection of compact, the ejection of compact is thorough, the technical objective that upper portion automatic discharge can be followed to having realized not uncapping.

The utility model discloses further stock guide through the slope setting makes unrestrained material self-sliding between shells and middle casing discharge to the discharge opening, and it is more light convenient to unload.

The utility model discloses further through set up the discharge tube on the discharge opening to set up the door on the discharge tube, so can close the door at centrifuge operating condition, avoid gas leakage polluted environment.

The utility model discloses further block the clearance between the holding ring on annular apron and the filter bag through the retaining ring of connection on the holding ring on the filter bag, avoid the material to fall into the liquid storage intracavity between the holding ring on annular apron and the filter bag and pollute the filtrating.

The utility model discloses further through set up the leakage fluid dram so that discharge filtrating on the base.

The utility model discloses further set the annular cover plate to the toper ring, be convenient for spill the material landing on the annular cover plate, avoid the material to pile up on the annular cover plate.

The utility model discloses further through set up the second guide way that extends in the slant in first guide way upper end, when the slip fall way rises to the direction key and slides in the second guide way, the slip fall way takes place to rotate, drives the filter bag and twists reverse, makes to produce the fold on the filter bag, makes the adhesion cracked and landing of the remaining filter cake on the filter bag between shell body and the middle casing, makes to unload more thoroughly. Meanwhile, due to the arrangement of the second guide groove, the bag turning stroke is shortened, and the overall height of the centrifuge is reduced.

Description of the drawings:

the following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a centrifuge according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of section C of FIG. 1;

fig. 5 is a schematic structural diagram of the centrifuge in discharging.

In fig. 1 to 5: 1. a base, 2, a bearing seat, 3, a main shaft, 4, a cone cap top, 5, a rotary drum bottom plate, 6, a rotary basket, 7, a driving motor, 8, a filtering hole, 9, a filter bag upper positioning ring, 10, a filter bag upper positioning groove, 11, a middle shell, 12, a liquid storage cavity, 13, an annular cover plate, 14, a positioning shaft, 15, a sliding lifting pipe, 16, a first guide groove, 17, a guide key, 18, a lifting sleeve, 19, a bearing, 20, an outer shell, 21, a top cover, 22, a sliding positioning sleeve, 23, a lifting driving rod, 2301, a piston rod, 24, a cross beam, 25, a filter cake bottom plate, 26, a filter bag lower positioning ring, 27, a filter bag lower positioning groove, 28, a filter bag, 29, a support column, 30, a liquid blocking plate, 31, a discharge opening, 32, a material guiding plate, 33, a discharge pipe, 34, a door, 35, a retainer ring, 36, a liquid discharge opening, 37, a liquid discharge pipe, 40. driven wheel, 41, driving wheel, 42, belt, 43 and feeding pipe.

The specific implementation mode is as follows:

the following describes in detail a specific embodiment of the present invention with reference to the drawings.

As shown in fig. 1 to 5, the closed bag-turning and discharging centrifuge comprises a base 1 and a bearing seat 2 connected to the base 1, wherein a spindle 3 is rotatably connected to the bearing seat 2, a conical crown 4 is connected to the upper end of the spindle 3, an annular drum bottom plate 5 is connected to the lower edge of the conical crown 4, a rotating basket 6 coaxially arranged with the spindle is vertically connected to the outer edge of the drum bottom plate 5, a driving motor 7 for driving the spindle 3 to rotate is connected to the base 1, a driven wheel 40 is fixedly connected to the lower end of the spindle 3 extending downwards out of the bearing seat 2, a driving wheel 41 is fixedly connected to the output shaft of the driving motor 7, the driving wheel 41 and the driven wheel 40 are in transmission connection through a belt 42, as shown in fig. 2, a large number of filter holes 8 are formed in the rotating basket 6, an upper positioning ring 9 for a filter bag is connected to the upper end of the rotating basket 6, an upper positioning groove 10 for the filter bag, the upper plane of the base 1 and the middle shell 11 form a liquid storage cavity 12 capable of containing filtrate, the inner diameter of the positioning ring 9 on the filter bag is equal to the inner diameter of the rotary basket 6, the outer diameter of the positioning ring 9 on the filter bag is between the rotary basket 6 and the middle shell 11, the upper end of the middle shell 11 is connected with an annular cover plate 13, the upper end of the annular cover plate 13 is not higher than the upper end of the positioning ring 9 on the filter bag, the inner circumferential surface of the annular cover plate 13 is close to the outer circumferential surface of the positioning ring 9 on the filter bag, preferably, the distance between the inner circumferential surface of the annular cover plate 13 and the outer circumferential surface of the positioning ring 9 on the filter bag is not more than 8mm, the upper end of the conical crown 4 is fixedly connected with a positioning shaft 14 which is coaxial with the main shaft 3, the positioning shaft 14 is sleeved with a sliding lifting pipe 15, the positioning shaft 14 is provided with a first guide groove, a lifting sleeve 18 is sleeved outside the sliding lifting pipe 15, as shown in fig. 4, the top end of the sliding lifting pipe 15 is rotatably connected with the top end of the lifting sleeve 18 through a bearing 19, the sliding lifting pipe 15 is axially fixed relative to the lifting sleeve 18, an outer shell 20 with a lower end fixedly connected with the upper plane of the base 1 is arranged on the periphery of the middle shell 11, a top cover 21 is connected with the top of the outer shell 20, a sliding positioning sleeve 22 coaxially arranged with the spindle 3 is inserted on the top cover 21, the lifting sleeve 18 is slidably inserted in the sliding positioning sleeve 22, the upper end of the lifting sleeve 18 extends out of the top cover 21 and the sliding positioning sleeve 22, a lifting driving rod 23 parallel to the spindle 3 is connected on the base 1 at one side of the outer shell 20, a cross beam 24 extending towards the lifting sleeve 18 is connected with the head of a piston rod 2301 of the lifting driving rod 23, the upper end of the lifting sleeve 18 is fixedly connected with the cross beam 24, the, the lower end of the sliding lifting pipe 15 is connected with a horn-shaped filter cake bottom plate 25 buckled on the conical crown 4 and the rotary drum bottom plate 5, as shown in fig. 3, the bottom surface of the outer edge of the filter cake bottom plate 25 is close to the upper surface of the rotary drum bottom plate 5, preferably, the distance between the bottom surface of the outer edge of the filter cake bottom plate 25 and the upper surface of the rotary drum bottom plate 5 is not more than 1cm, the outer edge of the filter cake bottom plate 25 is connected with a filter bag lower positioning ring 26, the outer diameter of the filter bag lower positioning ring 26 is smaller than the inner diameter of the rotary basket 6, a filter bag lower positioning groove 27 is arranged on the filter bag lower positioning ring 26, a filter bag 28 is arranged in the filter bag upper positioning groove 10 of the filter bag upper positioning ring 9, the lower opening of the filter bag 28 is clamped in the filter bag lower positioning groove 27 of the filter bag lower positioning ring 26, a plurality of support columns 29 are evenly distributed, the height of the supporting column 29 is such that when the sliding lifting pipe 15 descends to the lowest position, the lower surface of the liquid blocking plate 30 is just attached to the upper surface of the positioning ring 9 on the filter bag, the height of the lifting sleeve 18 below the top cover 21 is such that the lifting sleeve 18 is always positioned in the sliding positioning sleeve 22 during the discharging process, and the outer shell 20 is provided with a discharge opening 31.

As shown in fig. 1, an inclined annular material guiding plate 32 is connected to the inside of the outer shell 20, the lower edge of the material guiding plate 32 is connected to the discharge opening 31, the inner edge of the material guiding plate 32 is hermetically connected to the outer wall of the middle shell 11, and the outer edge of the material guiding plate 32 is hermetically connected to the inner wall of the outer shell 20. A discharge pipe 33 extending obliquely downward is connected to the discharge opening 31, and a closable door 34 is connected to an outer end of the discharge pipe 33.

As shown in FIG. 2, the outer edge of the upper end of the positioning ring 9 on the filter bag is connected with a retainer ring 35, the retainer ring 35 is located above the annular cover plate 13, and the outer diameter of the retainer ring 35 is between the inner diameter and the outer diameter of the annular cover plate 13.

As shown in FIG. 1, a liquid discharge port 36 communicating with the liquid storage chamber 12 is formed in the base 1, a liquid discharge pipe 37 communicating with the outside is connected to the liquid discharge port 36, and a liquid discharge valve 38 is provided in the liquid discharge pipe 37.

As shown in fig. 2, the annular cover plate 13 is a tapered ring with a small upper opening and a large lower opening.

As shown in fig. 1, a second guide groove 39 extending obliquely upward is further connected to the upper end of the first guide groove 16.

The utility model discloses the working process is: as shown in figure 1, when solid-liquid separation is required to be carried out on materials, a top cover 21 is opened, the materials are injected into a rotating basket 6 from an upper opening of an outer shell 20 through a pipeline, after the materials are injected, the top cover 21 is covered, a driving motor 7 is started, the driving motor drives a main shaft 3 to rotate, the main shaft 3 drives a conical cap top 4, a rotating drum bottom plate 5 and the rotating basket 6 to rotate and simultaneously drives a positioning shaft 14 to rotate, a first guide groove 16 on the positioning shaft 14 drives a guide key 17 inserted in the positioning shaft to rotate, the guide key drives a sliding lifting pipe 15 to rotate synchronously with the main shaft 3, so that a filter cake bottom plate 25 at the bottom of the sliding lifting pipe 15 is driven to rotate synchronously with the rotating basket 6, an upper opening and a lower opening of a filter bag 28 are driven to rotate synchronously, the materials in the rotating basket 6 are separated, in the separation process, the liquid materials are thrown out of a filter hole 8 in the rotating basket 6 into a liquid storage cavity 12 after being filtered by the filter, The drain 37 exits the centrifuge and upon completion of the separation, the solid material is intercepted by the filter bag 28 and forms a filter cake on the filter bag 28.

After the solid-liquid separation is completed, the driving motor 7 is stopped, the rotary basket 6 stops rotating, at the moment, the piston rod 2301 of the lifting driving rod 23 is controlled to extend upwards, the upper end of the piston rod 2301 drives the beam 24 to ascend, the beam 24 drives the lifting sleeve 18 to ascend, the lifting sleeve 18 drives the sliding lifting pipe 15 to ascend, the guide key 17 on the inner wall of the sliding lifting pipe 15 ascends along the first guide groove 16 to guide the sliding lifting pipe 15 to ascend straightly, the sliding lifting pipe 15 drives the filter cake bottom plate 25 and the lower opening of the filter bag 28 to ascend, the filter bag 28 is folded inwards gradually, the filter cake on the filter bag 28 is cracked gradually and falls on the filter cake bottom plate 25, when the guide key 17 ascends to enter the second guide groove 39, the lower opening of the filter bag 28 is positioned above the upper opening of the filter bag 28, under the self weight of the filter bag 28, the filter bag 28 slides downwards along the inclined plane of the filter cake bottom plate 25 to enable the filter bag, and slides along the inclined guide plate 32 to the discharge opening 31 to be discharged through the discharge pipe 33.

After the guide key 17 moves upwards to enter the second guide groove 39, the lifting driving rod 23 continues to drive the sliding lifting pipe 15 to ascend, so that the guide key 17 moves upwards obliquely along the second guide groove 39, the guide key 17 drives the sliding lifting pipe 15 to rotate, the sliding lifting pipe 15 drives the filter cake bottom plate 25 to rotate, the filter cake bottom plate 25 drives the lower opening of the filter bag 28 to rotate, the whole filter bag 28 is twisted, wrinkles are generated on the filter bag, filter cakes and filter residues on the filter bag 28 are further promoted to be cracked and fall, and the filter cakes are discharged more thoroughly.

To further simplify the feeding process, a feed pipe 43 that can slide up and down can be provided on the top cover 21, and when it is desired to feed material into the interior of the spin basket 6, the feed pipe 43 is moved down so that the lower end of the feed pipe 43 is inserted into the spin basket 6, and then the material is fed into the spin basket 6, and when the centrifuge is discharging, the feed pipe 32 is moved up to avoid interference with the rising cake floor 25.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. A closed bag-turning discharging centrifugal machine comprises a base (1) and a bearing seat (2) connected to the base (1), wherein a main shaft (3) is rotationally connected in the bearing seat (2), the upper end of the main shaft (3) is connected with a conical cap top (4), the lower edge of the conical cap top (4) is connected with an annular rotary drum bottom plate (5), the outer edge of the rotary drum bottom plate (5) is vertically connected with a rotary basket (6) coaxially arranged with the main shaft, the base (1) is connected with a driving motor (7) for driving the main shaft (3) to rotate, a large number of filter holes (8) are formed in the rotary basket (6), the upper end of the rotary basket (6) is connected with a filter bag upper positioning ring (9), a filter bag upper positioning groove (10) is formed in the upper end face of the filter bag upper positioning ring (9), a middle shell (11) with the lower end hermetically connected with the upper plane of the base (1) is arranged on the periphery of, the inner diameter of an upper positioning ring (9) of a filter bag is equal to the inner diameter of a rotating basket (6), the outer diameter of the upper positioning ring (9) of the filter bag is arranged between the rotating basket (6) and a middle shell (11), the upper end of the middle shell (11) is connected with an annular cover plate (13), the upper end of the annular cover plate (13) is not higher than the upper end of the upper positioning ring (9) of the filter bag, the inner circumferential surface of the annular cover plate (13) is close to the outer circumferential surface of the upper positioning ring (9) of the filter bag, the upper end of a conical crown (4) is fixedly connected with a positioning shaft (14) which is coaxially arranged with a main shaft (3), a sliding lifting pipe (15) is sleeved on the positioning shaft (14), a first guide groove (16) extending axially is arranged on the positioning shaft (14), a guide key (17) inserted in the first guide groove (16) in a sliding manner is fixedly connected on the inner wall of the sliding lifting pipe (15), and, the top end of a sliding lifting pipe (15) is rotatably connected with the top end of a lifting sleeve (18) through a bearing (19), the sliding lifting pipe (15) is axially fixed relative to the lifting sleeve (18), an outer shell (20) with the lower end fixedly connected with the upper plane of a base (1) is arranged on the periphery of a middle shell (11), the top of the outer shell (20) is connected with a top cover (21), a sliding positioning sleeve (22) coaxially arranged with a main shaft (3) is inserted into the top cover (21), the lifting sleeve (18) is slidably inserted into the sliding positioning sleeve (22), the upper end of the lifting sleeve (18) extends out of the top cover (21) and the sliding positioning sleeve (22), a lifting driving rod (23) parallel to the main shaft (3) is connected onto the base (1) positioned on one side of the outer shell (20), and a cross beam (24) extending towards the lifting sleeve (18) is connected to the head of a piston rod (2301) of, the upper end of the lifting sleeve (18) is fixedly connected with a cross beam (24), the lower end of the sliding lifting pipe (15) extends downwards out of the lifting sleeve (18), the lower end of the sliding lifting pipe (15) is connected with a horn-shaped filter cake bottom plate (25) buckled on the cone-shaped cap top (4) and the rotary drum bottom plate (5), the bottom surface of the outer edge of the filter cake bottom plate (25) is close to the upper surface of the rotary drum bottom plate (5), the outer edge of the filter cake bottom plate (25) is connected with a filter bag lower positioning ring (26), the outer diameter of the filter bag lower positioning ring (26) is smaller than the inner diameter of the rotary drum (6), a filter bag lower positioning groove (27) is arranged on the filter bag lower positioning ring (26), a filter bag (28) is arranged in the rotary drum (6), the upper opening of the filter bag (28) is clamped in the filter bag upper positioning groove (10) of the filter bag upper positioning ring (9, many support columns (29) are circumferentially and evenly distributed on filter cake bottom plate (25), and many support columns (29) upper end is connected with an annular liquid blocking plate (30), and the external diameter of liquid blocking plate (30) is greater than the internal diameter of holding ring (9) on the filter bag, the highly satisfied time that support column (29) descend to the lowest position when slip fall tube (15), and liquid blocking plate (30) lower surface just with the filter bag on holding ring (9) upper surface subsides connect, lift cover (18) highly satisfy in the in-process of unloading lift cover (18) of top cap (21) below is located slide locating cover (22) all the time, discharge opening (31) have been seted up on shell body (20).

2. The closed bag-turning and discharging centrifuge as claimed in claim 1, wherein a ring-shaped material guide plate (32) is obliquely arranged and connected to the inside of the outer shell (20), the lower edge of the material guide plate (32) is connected to the discharging opening (31), the inner edge of the material guide plate (32) is hermetically connected to the outer wall of the middle shell (11), and the outer edge of the material guide plate (32) is hermetically connected to the inner wall of the outer shell (20).

3. A closed type bag-turning and discharging centrifuge according to claim 1, wherein a discharging pipe (33) extending obliquely downward is connected to the discharging opening (31), and a closable door (34) is connected to an outer end of the discharging pipe (33).

4. The closed bag-turning and discharging centrifuge as claimed in claim 1, wherein the filter bag upper positioning ring (9) is connected with a retainer ring (35) at the upper end outer edge, the retainer ring (35) is positioned above the annular cover plate (13), and the outer diameter of the retainer ring (35) is between the inner diameter and the outer diameter of the annular cover plate (13).

5. The closed type bag-turning and discharging centrifuge as claimed in claim 1, wherein the base (1) is provided with a liquid discharge port (36) communicated with the liquid storage cavity (12), the liquid discharge port (36) is connected with a liquid discharge pipe (37) communicated with the outside, and the liquid discharge pipe (37) is provided with a liquid discharge valve (38).

6. A closed type bag-turning and discharging centrifuge according to claim 1, characterized in that the annular cover plate (13) is a conical ring with a small upper opening and a large lower opening.

7. A closed type bag-turning and discharging centrifuge according to claim 1, wherein a section of second guide groove (39) extending obliquely upwards is further connected to the upper end of the first guide groove (16).