Centrifugal machine

Abstract

The utility model belongs to the field of centrifugal devices, and particularly relates to a centrifugal machine which comprises a machine shell, an outer centrifugal unit, a first driving unit, an inner centrifugal unit, a second driving unit, a feeding unit and a supporting unit. The first driving unit comprises a first motor, a first driving gear, a first driven gear and a belt, the inner centrifugal unit comprises an inner rotating drum, a first rotating shaft and a second connecting piece, the second driving unit comprises a second motor, a second driving gear, a second driven gear and a belt, and the feeding unit comprises a third motor, a second rotating shaft and a feeding pipe. The first driving unit drives the outer centrifugal unit to rotate, and the second driving unit drives the inner centrifugal unit to rotate. The inner drum and the outer drum which can rotate in the same direction are arranged, the relative movement speed of water-carrying materials is reduced, the loss rate of the materials is reduced, and screen holes are prevented from being blocked.

Description

Technical Field

[0001] The invention belongs to the field of centrifugal devices, and in particular relates to a centrifuge. Background Art

[0002] The traditional centrifuge consists of two main parts: the rotor and the screen. The high-speed rotation of the rotor beats the material, causing the material to generate centrifugal force. Due to the barrier of the screen, the water is separated and the material remains in the cavity. The spiral blades on the rotor then push the dehydrated material into the next process.

[0003] However, traditional centrifuges require great centrifugal force for dehydration, so the rotor needs to rotate at a very high speed. During the high-speed rotation of the rotor, the material is hit hard, causing serious damage to the material. Taking the dehydration of bottle flakes and tray flakes as an example, the loss rate of bottle flakes in this process is more than 5%. Since the tray flakes are more brittle, the loss rate is more than 10%, making material recovery very difficult. In addition, due to the large amount of powder generated by material damage, the screen is easily blocked, resulting in a decrease in the dehydration rate, and the screen needs to be shut down and cleaned regularly, which is time-consuming and labor-intensive, affecting the company's continuous production. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of material loss and screen clogging during dehydration in the current centrifuge as described in the background technology, and propose a new centrifuge with low material loss rate and screen clogging.

[0005] A technical solution adopted to achieve the above-mentioned purpose is a centrifuge, which comprises:

[0006] A casing, wherein two baffles are provided in the casing;

[0007] An external centrifugal unit, wherein the external centrifugal unit is provided with an external drum and a first connecting member, wherein the external drum is arranged inside the casing, a plurality of sieve holes are arranged on the circumferential side wall of the external drum, and the first connecting member is connected to a side wall of one side of the external drum;

[0008] A first driving unit, wherein the first driving unit is provided with a first motor, a first driving gear, a first passive gear and a belt, wherein an output end of the first motor is fixedly connected to the first driving gear, the first driving gear is connected to the first passive gear through a belt, and the first passive gear is fixedly connected to a first connecting member;

[0009] An inner centrifugal unit, the inner centrifugal unit is provided with an inner drum, a first rotating shaft and a second connecting piece, a plug sleeve is provided in the inner drum, the plug sleeve is clamped with the first rotating shaft, a spiral blade is fixed on the outer side of the inner drum in the circumferential direction, and the second connecting piece is connected to a side wall of the inner drum on a side opposite to the first connecting piece;

[0010] A second driving unit, wherein the second driving unit is provided with a second motor, a second driving gear, a second passive gear and a belt, wherein an output end of the second motor is fixedly connected to the second driving gear, the second driving gear is connected to the second passive gear via a belt, and the second passive gear is fixedly connected to the first rotating shaft;

[0011] A feeding unit, wherein the feeding unit is provided with a third motor, a second rotating shaft and a feeding pipe, wherein an output end of the third motor is fixedly connected to the second rotating shaft, the second rotating shaft is located inside the feeding pipe, a spiral blade is connected to the outer side of the circumference of the second rotating shaft, and a feeding port is provided at the top of the feeding pipe;

[0012] The support unit is provided with a plurality of bearing seats, and the plurality of bearing seats are respectively connected to the first connecting member, the second connecting member and the first rotating shaft.

[0013] In the above technical solution, the first driving unit can drive the outer centrifugal unit to rotate at high speed, and the second driving unit can drive the inner centrifugal unit to rotate at high speed. When the outer centrifugal unit and the inner centrifugal unit rotate at high speed in the same direction, the relative movement speed of the water-carrying material in the centrifuge can be reduced, so that the water-carrying material reduces the force when colliding with the inner and outer drums and spiral blades, thereby reducing the loss of material.

[0014] Furthermore, a maintenance window may be provided on the surface of the casing to facilitate daily maintenance.

[0015] Furthermore, the inner drum and the outer drum are conical, and the inner drum is located inside the outer drum.

[0016] In the above technical solution, the use of a conical drum helps to improve the separation efficiency. The conical drum structure can effectively increase the sedimentation distance, making the solid-liquid separation more complete, and the water-containing material moves from the smaller diameter end to the larger diameter end, which increases the dehydration time of the water-containing material in the conical drum and improves the dehydration rate.

[0017] Furthermore, the two baffles are respectively arranged at both ends of the outer drum to divide the interior of the casing into a transition area, a drainage area and a discharge area, and the transition area is close to one side of the feeding unit.

[0018] In the above technical solution, the baffle is a ring-shaped central opening, the size of the opening corresponds to the size of the two ends of the outer drum, the water enters the drainage area through the sieve holes on the outer drum, and the material enters the discharge area through the opening between the inner and outer drums.

[0019] Furthermore, the outer drum is located in the drainage area, and the casing is provided with a drainage outlet at the bottom of the drainage area.

[0020] Furthermore, a discharge port is provided at the bottom of the housing located in the discharge area.

[0021] In the above technical solution, there is an inclination angle at the bottom of the casing, which is conducive to the separated water and materials sliding freely to the water drain port and the material discharge port by gravity.

[0022] Furthermore, the feed pipe is connected to one side of the outer drum, and the other side of the outer drum opposite to the feed pipe is open.

[0023] Furthermore, the centrifuge also includes a third connecting piece, the third connecting piece connects the outer drum and the inner drum, and the feed pipe is in communication with the third connecting piece.

[0024] In the above technical solution, the circumferential side wall of the third connecting piece is hollowed out, and the water-containing material can pass through the third connecting piece into the outer drum. The third connecting piece has a cavity on the side close to the first connecting piece, and the cavity forms a reflux bin, which allows the refluxed material to be stored in the reflux bin. When the machine is shut down, the material in the reflux bin re-enters the outer drum.

[0025] Furthermore, a sealing ring is provided at the connection between the outer drum and the first connecting member.

[0026] In the above technical solution, the sealing ring can block the reflux material and prevent the reflux material from overflowing.

[0027] Furthermore, the feed pipe portion is arranged inside the first connecting member, and the first connecting member and the second connecting member pass through the casing.

[0028] Furthermore, the side walls of one side of the outer drum and the inner drum are on the same plane.

[0029] The advantages of the present invention are:

[0030] 1. The present invention pushes the water-carrying material into the middle area between the outer drum and the inner drum through the feeding unit. Under the action of centrifugal force, the material adheres to the inner wall of the outer drum, and the water is discharged through the sieve holes on the circumference of the outer drum. The material is discharged from the discharge port under the push of the spiral blades on the outer wall of the inner drum. Since both the inner and outer drums can rotate at high speed, the relative movement speed of the material inside the centrifuge is low, thereby achieving high-efficiency water-material separation and reducing material loss, wherein the moisture content of the material can be reduced from 5% to below 3%, and the loss rate can be reduced to below 1%.

[0031] 2. In the present invention, since the outer drum is also in a high-speed rotating state, the probability of sieve hole blockage is greatly reduced, so that the outer drum is almost maintenance-free, which greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the outer drum of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the inner drum of the present invention;

[0037] Figure 5 It is an enlarged view of part B of the present invention.

[0038] Illustrations: 1. Casing, 101. Baffle, 102. Drain, 103. Discharge port, 2. External centrifugal unit, 201. External drum, 202. First connecting piece, 203. Sieve hole, 3. First driving unit, 301. First motor, 302. First driving gear, 303. First passive gear, 4. Internal centrifugal unit, 401. Internal drum, 402. First rotating shaft, 403. Second connecting piece, 404. Connecting sleeve, 5. Second driving unit, 501. Second motor, 502. Second driving gear, 503. Second passive gear, 6. Feed unit, 601. Third motor, 602. Second rotating shaft, 603. Feed pipe, 604. Feed port, 7. Support unit, 701. Bearing seat, 8. Third connecting piece, 9. Sealing ring, 10. Reflux bin. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] Example:

[0042] like Figure 1 , 2 As shown, a centrifuge is composed of a casing 1, an outer centrifugal unit 2, a first drive unit 3, an inner centrifugal unit 4, a second drive unit 5, a feed unit 6 and a support unit 7.

[0043] A maintenance window is provided on the circumferential surface of the casing 1. During normal operation, an iron plate is fixed at the maintenance window, and the iron plate is fixed to the casing by screws and nuts. When maintenance is required, the iron plate can be removed by rotating the screws, which is convenient for daily maintenance. The casing 1 is composed of an upper and lower part fixed by screws and nuts. A hanging ring is welded on both sides of the upper part of the casing 1. When the centrifuge needs to be assembled or disassembled, the hanging ring can be hooked with a hook to lift and drop, which is convenient for the assembly or disassembly of the centrifuge.

[0044] like Figure 3 As shown, the external centrifugal unit 2 is provided with an external drum 201 and a first connecting member 202. The external drum 201 is arranged inside the casing 1. The external drum 201 is conical and similar to a bell shape. The diameter on the left side is smaller than the diameter on the right side. Sieve holes 203 are evenly arranged on the side wall in the circumferential direction of the external drum 201. The sieve holes 203 are used to discharge moisture from the water-containing material. The first connecting member 201 is connected to the left side wall of the external drum 201, and the right side of the external drum 201 is an opening.

[0045] The first driving unit 3 is provided with a first motor 301, a first driving gear 302, a first passive gear 303 and a belt. The output end of the first motor 301 is fixedly connected to the first driving gear 302. The first driving gear 302 is connected to the first passive gear 303 through a belt. The first passive gear 303 is fixedly connected to the first connecting member 202. A protective cover is arranged on the outside of the first driving gear 302, the first passive gear 303 and the belt to prevent the device from being damaged.

[0046] The above-mentioned outer centrifugal unit 2 and the first driving unit 3 work together in principle: the first motor 301 is turned on, the output end of the first motor 301 rotates to drive the first driving gear 302 to rotate, the first driving gear 302 and the first passive gear 303 are driven by a belt, the first passive gear 303 rotates to drive the first connecting member 202 to rotate, the first connecting member 202 drives the outer drum 201 to rotate, and the rotation speed of the outer drum can be adjusted by adjusting the rotation speed of the first motor 301.

[0047] like Figure 4 As shown, the inner centrifugal unit 4 is provided with an inner drum 401, a first rotating shaft 402 and a second connecting piece 403. A plug-in sleeve 404 is provided in the inner drum 401. The plug-in sleeve 404 is connected and fixed to the inner wall of the inner drum 401 through a connecting ring. The plug-in sleeve 404 is clamped with the first rotating shaft 402. The inner drum 401 is a hollow cone. The left diameter of the inner drum 401 is smaller than the right diameter. The left side is in a closed state. A baffle is provided on the right side. The opening at the center of the baffle leaves an insertion gap for the first rotating shaft 402. The second connecting piece 403 is connected to the right side wall of the inner drum 401. A spiral blade is fixed on the outer side of the inner drum 401 in the circumferential direction, and the spiral blade has a certain extension distance to the left, which is less than the distance from the left side wall of the outer drum 201 to the left side wall of the inner drum 401. The spiral blade here has the function of driving the water-carrying material entering the inner part of the outer drum 201 from the feed pipe 603 to move to the right, and the spiral blade here also has a certain function of diverting the water-carrying material.

[0048] The second driving unit 5 is provided with a second motor 501, a second driving gear 502, a second passive gear 503 and a belt. The output end of the second motor 501 is fixedly connected to the second driving gear 502. The second driving gear 502 is connected to the second passive gear 503 through a belt. The second passive gear 503 is fixedly connected to the first rotating shaft 402. Protective covers are arranged on the outer sides of the second driving gear 502, the second passive gear 503 and the belt to prevent damage to the device.

[0049] The above-mentioned second driving unit 5 and inner centrifugal unit 4 work together on the principle that the second motor 501 is turned on, the output end of the second motor 501 rotates to drive the second driving gear 502 to rotate, the second driving gear 502 and the second passive gear 503 are driven by a belt, the second passive gear 503 drives the first rotating shaft 402 to rotate, the first rotating shaft 402 drives the inner rotating drum 401 to rotate, and the rotation speed of the inner rotating drum can be adjusted by adjusting the rotation speed of the second motor 501.

[0050] The feeding unit 6 is provided with a third motor 601, a second rotating shaft 602 and a feeding pipe 603. The output end of the third motor 601 is fixedly connected to the second rotating shaft 602. The second rotating shaft 602 is located inside the feeding pipe 603. The outer side of the circumference of the second rotating shaft 602 is connected to the spiral blade. A feeding port 604 is opened at the top of the feeding pipe 603. A feeding pipe is welded to the upper end of the feeding port 604. A flange is connected at the mouth of the feeding pipe, which can be connected to the discharge pipe of the storage device through a flange, which is convenient for operation to prevent the water-containing material from spilling.

[0051] The support unit 7 is provided with four bearing seats 701 , of which two bearing seats 701 are connected to the first connecting member 202 , and the other two are connected to the second connecting member 403 and the first rotating shaft 402 respectively. The first connecting member 202 , the second connecting member 403 and the first rotating shaft 402 can rotate freely on the bearing seats 701 .

[0052] like Figure 5 As shown, the centrifuge further includes a third connecting member 8 , which connects the outer drum 201 , the inner drum 401 and the feed pipe 603 . A sealing ring 9 is provided at the connection between the outer drum 201 and the first connecting member 202 .

[0053] The above-mentioned third connecting member 8 is composed of an annular plate and connecting strips evenly arranged along the circumferential direction of the annular plate. The center of the annular plate is connected to the feed pipe 603. The left side of the annular plate of the third connecting member 8 and the left side of the outer drum 201 and part of the circumferential side wall form a cavity, and the cavity is the reflux bin 10. The third connecting member 8 is clamped with the inner drum 401, and is rotatably connected to the outer drum 201 and the feed pipe 603, which plays a role in stabilizing the device and reducing noise. During feeding, the connecting strips on the third connecting member 8 divert the water-containing material entering the inner part of the outer drum into the upper and lower sides of the outer drum to prevent material blockage and further improve the dehydration rate.

[0054] The baffles 101 are respectively arranged at both ends of the outer drum 201, and are clamped with the outer shells at both ends of the outer drum 201 to divide the interior of the casing 1 into a transition area, a drainage area and a discharge area. The transition area is close to one side of the feeding unit 6, and the outer drum 201 is located in the drainage area. A drainage port 102 is provided at the bottom of the drainage area of ​​the casing 1, and the drainage port 102 can be connected to the drainage pipe on the outside. A flange is fixed at the tail end of the drainage pipe. Before the centrifuge is operated, a water pipe can be connected to the drainage pipe through the flange, and the other end of the water pipe is connected to the water storage tank for storing separated water; a discharge port 103 is provided at the bottom of the discharge area of ​​the casing 1, and the discharge port 103 is directly downwardly arranged so that the dehydrated material can directly fall freely by gravity, instead of the discharge port being arranged upwardly as used in the prior art, which is beneficial to saving production resources.

[0055] The bottom of the casing 1 is tilted downward to the right, so that the water and materials can slide freely along the bottom wall of the casing 1, which is convenient for the water and materials to be discharged.

[0056] The centrifuge described in this embodiment is arranged on a centrifuge frame for fixing, and the four bearing seats 701, the first motor 301 and the second motor 501 are all fixed on the centrifuge frame.

[0057] In this embodiment, the feed pipe 603 passes through the first connecting member 202 and is connected to the left side of the outer drum 201 and continues to extend into and is connected to the third connecting member 8. The other end of the feed pipe 603 is located outside the first connecting member 202. A bracket is provided at the bottom of the feed pipe 603 in the external part, wherein the feed pipe 603 is rotatably connected to the first connecting member 202, and the feed pipe 603 is fixed to the centrifuge frame through the bracket and does not rotate with the rotation of the external centrifugal unit 2; the first connecting member 202 and the second connecting member 403 pass through the casing 1, and the casing 1 is fixed to the centrifuge frame, and the casing 1 does not rotate with the rotation of the first connecting member 202 and the second connecting member 403.

[0058] In this embodiment, the right side walls of the outer drum 201 and the inner drum 401 are on the same vertical plane to form a ring, and there is an opening between the inner circle and the outer circle of the ring, and the material enters the discharge area from the opening, but it is not limited to this. In other embodiments, the right side wall of the outer drum 201 can be biased to the right or left relative to the right side wall of the inner drum 401. This technical solution depends on the effective dehydration distance of the water-containing material.

[0059] In this embodiment, the inner drum 401 and the outer drum 201 are conical, with one side having a smaller diameter than the other side. The inner drum 401 is located inside the outer drum 201, and the inner drum 401 and the outer drum 201 are arranged in the same direction. The conical design can increase the dehydration distance of the water-containing material and increase the dehydration efficiency.

[0060] The working process of the present invention is as follows: the water-carrying material is put into the feed port 604, the third motor 601 is started, the third motor 601 drives the second rotating shaft 602 to rotate, the spiral blades on the second rotating shaft 602 push the water-carrying material into the middle area between the inner drum 401 and the outer drum 201, the first motor 301 and the second motor 501 are started, the first motor 301 and the second motor 501 are both driven by belts to drive the inner drum 401 and the outer drum 201 to rotate in the same direction, the water-carrying material adheres to the inner wall of the outer drum 201 under the action of centrifugal force, the water is discharged through the sieve holes 203 on the outer drum 201, the water enters the drainage area, and is finally discharged through the drainage port 102, the material is trapped between the inner drum 401 and the outer drum 201, and is pushed to the discharge area by the spiral blades on the outer wall of the inner drum 401, and is discharged from the discharge port 103.

[0061] In the above work process, water-containing materials may flow back. This phenomenon occurs when Figure 5In the area shown, when the spiral blades of the feeding unit push the water-carrying material into the outer drum 201, due to the high-speed rotation and the third connecting piece 8, the water-carrying material will be divided and enter the outer drum 201 from the upper side and the lower side. When the water-carrying material is thrown to the upper side, a backflow phenomenon may occur. The backflow water-carrying material flows back to a partial area on the side of the third connecting piece 8 and the first connecting piece 202. In order to solve this problem, the present invention adopts the following methods: First, since the spiral blades on the outer wall of the inner drum 401 of the present invention extend toward the left side wall of the outer drum 201, the backflow direction of the water-carrying material will pass through the extension area of ​​the spiral blades on the outer wall of the inner drum 401. Under the push of the spiral blades on the outer wall of the inner drum 401, part of the backflow material The material is pushed to enter the normal process. Secondly, the left side of the annular plate of the third connecting member 8 arranged in the present invention and the left side of the outer drum 201 and part of the circumferential side wall form a reflux bin 10. The reflux material enters the reflux bin 10 by inertia. When the machine is shut down, the reflux material is no longer affected by the centrifugal force, and returns to the normal process along the bottom side wall of the outer drum 201 under the action of inertia. Thirdly, since the reflux direction of the water-carrying material first moves to the upper left, the water-carrying material may impact the connection between the outer drum 201 and the first connecting member 202, causing water to overflow from the connection. The present invention is provided with a sealing ring 9 at the connection between the outer drum 201 and the first connecting member 202. The sealing ring 9 can block the reflux material and prevent overflow.

[0062] Application examples:

[0063] PET bottle flakes and water were mixed in a mass ratio of 1:1 to obtain water-containing material A, and PET tray flakes and water were mixed in a mass ratio of 1:1 to obtain water-containing material B. The water-containing material A and the water-containing material B were respectively dehydrated by the centrifuge described in the embodiment and the traditional centrifuge. After dehydration, the material loss rate and the material moisture content were calculated. The results are shown in Table 1.

[0064] Table 1

[0065]

[0066] As can be seen from Table 1, the centrifuge of the present invention can effectively reduce the material loss rate and material moisture content of the water-carrying material after centrifugation, wherein the material loss rate can be as low as below 1%, and the material moisture content can be reduced to below 3%. In the present invention, since both the inner and outer drums can rotate freely at high speed, by controlling the inner and outer drums to rotate in the same direction at similar speeds, the relative movement speed of the water-carrying material inside the centrifuge is low. Under the condition of low relative movement speed, the material is subjected to reduced force by the outer spiral blades of the inner drum and the walls of the inner and outer drums in the centrifuge, thereby preventing the material from being worn and damaged due to collision, and then reducing the material loss rate; since the outer drum is also in a high-speed rotating state, this state is not conducive to the adhesion of solid powder, thereby preventing the powder from agglomerating and causing the sieve hole to be blocked, and the dispersed solid powder is easier to rush out of the sieve hole under the action of centrifugal force, further preventing the sieve hole from being blocked.

[0067] Finally, it should be noted that the present embodiment is only used to illustrate the present invention and does not limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A centrifuge, characterized in that: The centrifuge includes: A casing (1), wherein two baffles (101) are provided inside the casing (1); An external centrifugal unit (2), the external centrifugal unit (2) being provided with an external drum (201) and a first connecting member (202), the external drum (201) being arranged inside the casing (1), a side wall of the external drum (201) being provided with a plurality of sieve holes (203) in a circumferential direction, and the first connecting member (202) being connected to a side wall of one side of the external drum (201); A first driving unit (3), the first driving unit (3) comprising a first motor (301), a first driving gear (302), a first passive gear (303) and a belt, the output end of the first motor (301) being fixedly connected to the first driving gear (302), the first driving gear (302) being connected to the first passive gear (303) via a belt, and the first passive gear (303) being fixedly connected to the first connecting member (202); An inner centrifugal unit (4), the inner centrifugal unit (4) being provided with an inner rotating drum (401), a first rotating shaft (402) and a second connecting member (403); a plug sleeve (404) being provided inside the inner rotating drum (401), the plug sleeve (404) being clamped with the first rotating shaft (402); spiral blades being fixed on the outer side of the inner rotating drum (401) in a circumferential direction; and the second connecting member (403) being connected to a side wall of the inner rotating drum (401) in a direction opposite to the first connecting member (202); a second driving unit (5), the second driving unit (5) being provided with a second motor (501), a second driving gear (502), a second driven gear (503) and a belt, the output end of the second motor (501) being fixedly connected to the second driving gear (502), the second driving gear (502) being connected to the second driven gear (503) via a belt, and the second driven gear (503) being fixedly connected to the first rotating shaft (402); A feeding unit (6), the feeding unit (6) being provided with a third motor (601), a second rotating shaft (602) and a feeding pipe (603), the output end of the third motor (601) being fixedly connected to the second rotating shaft (602), the second rotating shaft (602) being located inside the feeding pipe (603), the outer side of the circumference of the second rotating shaft (602) being connected to a spiral blade, and a feeding port (604) being provided at the top end of the feeding pipe (603); A support unit (7), wherein the support unit (7) is provided with a plurality of bearing seats (701), and the plurality of bearing seats (701) are respectively connected to the first connecting member (202), the second connecting member (403) and the first rotating shaft (402).

2. The centrifuge according to claim 1, characterized in that: The inner drum (401) and the outer drum (201) are conical, and the inner drum (401) is located inside the outer drum (201).

3. The centrifuge according to claim 1, characterized in that: The two baffles (101) are respectively arranged at both ends of the outer drum (201) to divide the interior of the casing (1) into a transition area, a drainage area and a discharge area, wherein the transition area is close to one side of the feed unit (6).

4. The centrifuge according to claim 3, characterized in that: The outer drum (201) is located in the drainage area, and a drainage outlet (102) is provided at the bottom of the housing (1) located in the drainage area.

5. The centrifuge according to claim 3, characterized in that: The casing (1) is provided with a discharge port (103) at the bottom of the discharge area.

6. The centrifuge according to claim 1, characterized in that: The feed pipe (603) is in communication with one side of the outer drum (201), and the other side of the outer drum (201) that is in communication with the feed pipe (603) is open.

7. The centrifuge according to claim 1, characterized in that: The centrifuge further comprises a third connecting member (8), wherein the third connecting member (8) connects the outer drum (201) and the inner drum (401), and the feed pipe (603) is in communication with the third connecting member (8).

8. The centrifuge according to claim 1, characterized in that: A sealing ring (9) is provided at the connection between the outer drum (201) and the first connecting member (202).

9. The centrifuge according to claim 1, characterized in that: The feed pipe (603) is partially disposed inside the first connecting member (202), and the first connecting member (202) and the second connecting member (403) penetrate the casing (1).

10. The centrifuge according to claim 1, characterized in that: One side wall of the outer drum (201) and one side wall of the inner drum (401) are located on the same plane.

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