Cleaning structure for water outlet flow channel of horizontal screw centrifuge

Abstract

The utility model discloses a horizontal spiral centrifuge water outlet flow channel cleaning structure which comprises a rotary drum, a spiral is arranged in the rotary drum in a rotating mode, a large end cover is arranged at one end of the rotary drum, a feeding pipe penetrates through the large end cover and is arranged along the axis of the rotary drum, a centripetal pump impeller is arranged in the large end cover in a rotating mode, and the inlet side of the centripetal pump impeller is communicated with the interior of the rotary drum. The outlet side is connected with a liquid outlet pipe, and the liquid outlet pipe is arranged outside the feeding pipe in a sleeving manner; and the large end cover is provided with a discharge port. A cleaning structure is additionally arranged in the centripetal pump chamber of the horizontal screw centrifugal machine, when a water outlet flow channel of an impeller of the centripetal pump and the centripetal pump chamber are blocked by solid matter, the centripetal pump does not need to be completely disassembled and cleaned, and the material blocking problem can be rapidly and effectively solved; meanwhile, the abrasion condition of the centripetal pump impeller can be observed through the cleaning hole, and preventive measures can be taken in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of horizontal scroll centrifuges, and particularly relates to a cleaning structure for the water outlet channel of a horizontal scroll centrifuge. Background Art

[0002] A horizontal scroll centrifuge is a processing device widely used in solid-liquid separation applications. Its working principle is that the drum and the spiral pusher rotate at a certain differential speed in the same direction at high speed. A fluid suspension composed of liquid and solid is continuously introduced into the interior of the spiral pusher through a feed pipe, and after acceleration, it enters the drum. Under the action of centrifugal force, the heavier solid matter deposits on the drum wall to form a sediment layer. The spiral pusher continuously pushes the deposited solid matter to the conical drum. After being discharged through the slag outlet, it will be thrown towards the inner surface of the housing along the circumference, and finally discharged from the horizontal scroll centrifuge through its own gravity from the solid phase outlet; the clear liquid flows to the other end of the drum and is discharged from the horizontal scroll centrifuge through the centrifugal pump impeller under pressure. The operator can quickly and accurately adjust the diameter of the centrifugal pump impeller under the condition of non-stop operation according to the change of the material working condition to ensure the separation effect of the clear liquid.

[0003] The horizontal scroll centrifuge with a centrifugal pump impeller structure has many advantages. It can quickly and accurately adjust the diameter of the impeller under the condition of non-stop operation, that is, change the depth of the liquid pool, and is especially suitable for materials with unstable and frequently changing working conditions. At the same time, due to the relatively complex structure of the centrifugal pump and the narrow and closed centrifugal pump chamber, there are still a small amount of solid matters in the clear liquid. When discharged through the centrifugal pump impeller, some will remain in the centrifugal pump chamber, accumulating for a long time and not being cleaned thoroughly; or when the content of solid matters in the material suddenly increases sharply, a large amount of solid matters will enter the centrifugal pump chamber, blocking the water outlet channel of the centrifugal pump impeller and the centrifugal pump chamber, resulting in the inability to discharge the clear liquid and the machine cannot be used normally. It is necessary to remove the drum, completely disassemble the centrifugal pump, clean the centrifugal pump chamber and reinstall it before it can be used normally.

[0004] In view of the above, it is necessary to propose a cleaning structure for the water outlet channel of a horizontal scroll centrifuge to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide a cleaning structure for the water outlet channel of a horizontal scroll centrifuge.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows: A cleaning structure for the water outlet channel of a horizontal scroll centrifuge includes a drum, a spiral is rotatably arranged in the drum, a large end cover is arranged at one end of the drum, a feed pipe is arranged along the axis of the drum through the large end cover, a centrifugal pump impeller is rotatably arranged in the large end cover, the inlet side of the centrifugal pump impeller is communicated with the interior of the drum, and an outlet pipe is connected to the outlet side, and the outlet pipe is sleeved outside the feed pipe; a discharge port is arranged on the large end cover.

[0007] Furthermore, the large end cover includes an annular cover and a side cover. The annular cover is sleeved on the outer periphery of the centripetal pump impeller. The side cover is arranged on the outlet side of the centripetal pump impeller, and a large end liquid disc body and a liquid baffle for separating from the inside of the drum are arranged on the inlet side of the centripetal pump impeller. A centripetal pump chamber is formed by the large end cover, the large end liquid disc body and the liquid baffle, and the centripetal pump impeller is rotatably arranged in the centripetal pump chamber.

[0008] Furthermore, the drain ports are arranged on the annular cover and the side cover, and a plurality of drain ports on the annular cover and the side cover are evenly distributed in a circumferential manner. The drain ports on the annular cover are circumferential discharge ports, and the drain ports on the side cover are end discharge ports.

[0009] Furthermore, internal threads are provided on the inner wall of the drain port, a drain plug is threadedly connected to the drain port, and a gasket is tightly arranged between the drain plug and the drain port.

[0010] Furthermore, a discharge blocking structure is arranged outside the large end cover. The discharge blocking structure includes a rotating sealing disc and a sliding sealing sleeve. The rotating sealing disc is attached to the outside of the side cover and is rotatably connected to the large end cover. The sliding sealing sleeve is in a ring structure and is sleeved on the outer periphery of the annular cover. The sliding sealing sleeve is slidably connected to the drum in its axial direction. The sliding sealing sleeve is driven by the rotating sealing disc, and when the rotating sealing disc rotates relative to the drum, the sliding sealing sleeve is driven to slide along the axial direction of the drum.

[0011] Furthermore, a slip ring groove is arranged on the outer periphery of the shaft rod of the large end cover. A rotating sleeve matched with the slip ring groove is arranged at the center of the rotating sealing disc. The slip ring groove restricts the axial movement of the rotating sealing disc. A plurality of positioning holes for limiting the rotation angle of the rotating sealing disc are arranged on the slip ring groove. A positioning screw is screwed on the rotating sleeve, and the positioning screw cooperates with the positioning hole to position the position of the rotating sealing disc.

[0012] Furthermore, a plurality of guide blocks are arranged on the outer wall of the annular cover along the axial direction. Guide grooves matched with the guide blocks are arranged on the inner wall of the sliding sealing sleeve along the axial direction, and the guide blocks are slidably arranged in the guide grooves.

[0013] Furthermore, a camshaft protrudes from the outer circumferential wall of the rotating sealing disc, and a cam track arranged along a spiral line is arranged on the inner wall of the sliding sealing sleeve. The camshaft is placed in the cam track to form a cam fit.

[0014] Furthermore, slag discharge holes corresponding to the end discharge ports are arranged on the rotating sealing disc. The change of the rotation position of the rotating sealing disc relative to the drum controls the coincidence or dislocation of the slag discharge holes and the end discharge ports. The change of the axial position of the sliding sealing sleeve controls the exposure or blockage of the circumferential discharge ports.

[0015] The advantages and beneficial effects of the present utility model are as follows: By adding a cleaning structure to the centripetal pump chamber of a horizontal spiral centrifuge, when the water flow channels of the centripetal pump impeller and the centripetal pump chamber are blocked by solids, it is not necessary to completely disassemble the centripetal pump for cleaning, and the blockage problem can be quickly and effectively solved; at the same time, the wear condition of the centripetal pump impeller can be observed through the cleaning hole, and preventive measures can be taken in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a schematic structural diagram of Embodiment 1 of a water flow channel cleaning structure of a horizontal spiral centrifuge according to the present utility model;

[0017] Figure 2 FIG. 10 is an exploded view of Embodiment 2 of the present utility model;

[0018] Figure 3 FIG. 14 is an axonometric view of the discharge blocking structure in the closed state in Embodiment 2 of the present utility model;

[0019] Figure 4 FIG. 18 is a longitudinal sectional view of the discharge blocking structure in the closed state in Embodiment 2 of the present utility model;

[0020] Figure 5 FIG. 22 is an axonometric view of the discharge blocking structure in the open state in Embodiment 2 of the present utility model;

[0021] Figure 6 FIG. 26 is a longitudinal sectional view of the discharge blocking structure in the closed state in Embodiment 2 of the present utility model;

[0022] In the figures: 1, drum; 2, screw; 3, large end cover; 4, feed pipe; 5, centripetal pump impeller; 6, liquid outlet pipe; 7, drain port; 8, annular cover; 9, side cover; 10, large end liquid pan body; 11, liquid retaining disk; 12, centripetal pump chamber; 13, circumferential discharge port; 14, end discharge port; 15, drain plug; 16, gasket; 17, rotating seal disk; 18, sliding seal sleeve; 19, sliding ring groove; 20, positioning hole; 21, positioning screw; 22, guide groove; 23, guide block; 24, camshaft; 25, cam track; 26, slag discharge hole; 27, rotating sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following combines the drawings and embodiments to further describe the specific implementation manners of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0024] Embodiment 1:

[0025] A water flow channel cleaning structure of a horizontal spiral centrifuge, as Figure 1As shown in the figure, it includes a rotating drum 1, inside which a screw 2 is rotatably arranged. At one end of the rotating drum 1, there is a large end cover 3. A feed pipe 4 is arranged along the axis of the rotating drum 1 through the large end cover 3. The solid-liquid mixed material to be separated is fed into the interior of the rotating drum 1 by the feed pipe 4. When the rotating drum 1 rotates, the material is separated therein. Inside the large end cover 3, a centrifugal pump impeller 5 is rotatably arranged. The inlet side of the centrifugal pump impeller 5 communicates with the interior of the rotating drum 1, and the outlet side is connected with a liquid outlet pipe 6. The liquid outlet pipe 6 is sleeved outside the feed pipe 4. The liquid in the mixed material is separated and sent outwards through the centrifugal pump impeller 5. A discharge port 7 is arranged on the large end cover 3, and the liquid sent out by the centrifugal pump impeller 5 passes through the liquid outlet pipe 6.

[0026] Specifically, after the suspension entering the horizontal screw centrifuge is separated, the clear liquid flows from between the rotating drum 1 and the screw 2 to the centrifugal pump, passes through the gap between the liquid retaining disc 11 and the rotating drum 1, and flows into the centrifugal pump chamber 12 through six holes uniformly arranged on the large end liquid disc body 10. The centrifugal pump chamber 12 is a closed space, surrounded by the shaft body of the large end cover 3, the large end liquid disc body 10 and the centrifugal pump. The centrifugal pump impeller 5 is in the middle, and a water outlet channel is arranged on the impeller. After the clear liquid enters the centrifugal pump chamber 12, it is immediately discharged out of the horizontal screw centrifuge under pressure through the liquid outlet pipe 6 of the centrifugal pump. Specifically, as Figure 1 shown in the figure, the large end cover 3 includes an annular cover 8 and a side cover 9. The annular cover 8 is sleeved on the outer periphery of the centrifugal pump impeller 5. The side cover 9 is arranged on the outlet side of the centrifugal pump impeller 5, and a large end liquid disc body 10 and a liquid retaining disc 11 for separating from the interior of the rotating drum 1 are arranged on the inlet side of the centrifugal pump impeller 5. The centrifugal pump chamber 12 is surrounded by the large end cover 3, the large end liquid disc body 10 and the liquid retaining disc 11, and the centrifugal pump impeller 5 is rotatably arranged in the centrifugal pump chamber 12.

[0027] Further, the drain port 7 is provided on the annular cover 8 and the side cover 9, and a plurality of drain ports 7 on the annular cover 8 and the side cover 9 are arranged in a circumferentially uniform manner. The drain port 7 on the annular cover 8 is a circumferential discharge port 13, and the drain port 7 on the side cover 9 is an end discharge port 14. Since the separated clear liquid still contains a small amount of solids, and the space of the centripetal pump chamber 12 is closed and narrow, with long-term accumulation and insufficient cleaning, or when the solid content in the material suddenly increases sharply, a large amount of solids will enter the centripetal pump chamber 12, blocking the water outlet channel of the adjustable centripetal pump impeller 5 and the centripetal pump chamber 12, resulting in the inability to discharge the clear liquid and the machine being unable to operate normally. In this embodiment, six threaded drain ports 7 are evenly opened on the annular cover 8 and the side cover 9 on both sides of the centripetal pump chamber 12. Thus, when cleaning, the drain ports 7 are opened to increase the discharge positions of the centripetal pump chamber 12, forming a scouring effect on various parts inside the centripetal pump, effectively cleaning the inside of the centripetal pump; an internal thread is provided on the inner wall of the drain port 7, and a drain plug 15 is threadedly connected to the drain port 7, and a gasket 16 is tightly pressed between the drain plug 15 and the drain port 7. When the equipment is running, the drain port 7 can be blocked by the drain plug 15, enabling the centripetal pump to operate well. Once the centripetal pump chamber 12 and the liquid outlet pipe 6 are blocked by solids, after removing the drain plug 15 and the copper gasket 16, the solids accumulated in the centripetal pump chamber 12 can be flushed clean through these drain ports 7, and then the drain plug 15 and the copper gasket 16 can be reinstalled to run again. The entire cleaning process does not require the removal and disassembly of the drum 1 for cleaning, and the blockage problem can be solved quickly and effectively; at the same time, by adding an observation hole, it is convenient to observe the blockage or wear of the centripetal pump impeller 5 and take preventive measures in advance.

[0028] Embodiment 2:

[0029] Since when the number of drain ports 7 is large during the cleaning of the centripetal pump, it can increase the outlet and the flow rate and increase the scouring outlet, which is helpful for the cleaning of the centripetal pump. However, the subsequent problem is that as the number of drain ports 7 in Embodiment 1 increases, and each drain port 7 is tightly sealed by a drain plug 15, the cleaning is more cumbersome. It is necessary to disassemble the drain plugs 15 on each drain port 7 one by one. After cleaning, the drain ports 7 also need to be blocked by the drain plugs 15 one by one. Since there are many drain ports 7, the operation is inconvenient.

[0030] As an improvement, in this embodiment, a discharge blocking structure is provided outside the large end cover 3, such as Figures 2 - 6As shown, the discharge plugging structure includes a rotary sealing disc 17 and a sliding sealing sleeve 18; the rotary sealing disc 17 is attached to the outside of the side cover 9 and is rotatably connected to the large end cover 3; the sliding sealing sleeve 18 is in a ring structure and is sleeved on the outer periphery of the ring cover 8, and the sliding sealing sleeve 18 is slidably connected to the rotating drum 1 in the axial direction of its axis; specifically, a slip ring groove 19 is provided on the outer periphery of the shaft rod of the large end cover 3, and a rotating sleeve 27 matching the slip ring groove 19 is provided at the center of the rotary sealing disc 17. The slip ring groove 19 restricts the axial movement of the rotary sealing disc 17, so that the rotary sealing disc 17 can be attached to the side cover 9 and rotate relative to the side cover 9 without moving away from it; and, a slag discharge hole 26 corresponding to the end discharge port 14 is provided on the rotary sealing disc 17; the change in the rotational position of the rotary sealing disc 17 relative to the rotating drum 1 controls the coincidence or misalignment of the slag discharge hole 26 and the end discharge port 14; the change in the axial position of the sliding sealing sleeve 18 controls the exposure or plugging of the circumferential discharge port 13; as Figure 4 shown, if the slag discharge hole 26 and the end discharge port 14 are misaligned, then at this time the rotary sealing disc 17 plugs the end discharge port 14, and as Figure 6 shown, when the rotary sealing disc 17 rotates a certain angle, the slag discharge hole 26 is aligned with the discharge port, so that the blockage in the centripetal pump chamber 12 can be discharged.

[0031] And the sliding sealing sleeve 18 is sleeved on the outer periphery of the ring cover 8. As Figure 4 shown, at this time the position of the sliding sealing sleeve 18 is at the rightmost side and wraps the circumferential discharge port 13, thus achieving sealing; after the sliding sealing sleeve 18 moves, as Figure 6 shown, at this time the sliding sealing sleeve 18 moves to the left end stop point, so that the circumferential discharge port 13 is exposed, so that the blockage can be discharged from this port. It can be understood that a sealing ring and other structures can also be added at the positions of the rotary sealing disc 17, the sliding sealing sleeve 18 corresponding to the discharge port 7 to form enhanced sealing, which is convenient to improve the sealing effect during use.

[0032] Furthermore, in this embodiment, the sliding sealing sleeve 18 is driven by the rotary sealing disc 17. When the rotary sealing disc 17 rotates relative to the rotating drum 1, it drives the sliding sealing sleeve 18 to slide axially along the rotating drum 1. As Figure 3 、 4 shown, when the horizontal spiral centrifuge is normally separating, at this time the sliding rotary sealing disc 17 rotates to a state misaligned with the end discharge port 14, and at this time it is in a closed state, and at the same time the sliding sealing sleeve 18 is located at the right end stop point, thus sealing the circumferential discharge port 13; and when the centripetal pump is blocked and needs to be cleaned, then as Figure 5 、 6As shown, unlock the rotation seal disc 17 and rotate it to align with the end discharge port 14. At this time, it is in the open state, and the rotation torque of the rotation seal disc 17 is used to drive the sliding seal sleeve 18 to axially slide, so that the sliding seal sleeve 18 moves to the left dead point, so that the circumferential discharge port 13 is also opened, so that the end discharge port 14 and the circumferential discharge port 13 can be discharged simultaneously. It can be understood that this device can be positioned at Figure 5 , 6 the state shown. Then operate the horizontal screw centrifuge, and introduce the cleaning liquid into the feed pipe 4. Using the rotational kinetic energy, the cleaning liquid is accelerated and flushed into the inside of the centripetal pump chamber 12. The cleaning liquid can flow out from each drain port 7, so as to realize the flushing and discharging of multiple parts in the centripetal pump chamber 12 and enhance the cleaning effect.

[0033] The specific structure is as Figure 2 shown. A plurality of positioning holes 20 for limiting the rotation angle of the rotation seal disc 17 are provided on the slip ring groove 19. Figure 2 As shown, two positioning holes 20 are provided in the slip ring groove 19, which are respectively used for the open and closed states of the rotation seal disc 17; and a positioning screw 21 is screwed on the rotating sleeve 27, and the positioning screw 21 cooperates with the positioning hole 20 to position the position of the rotation seal disc 17. When the screw is aligned with any one of the positioning holes 20 and screwed in, the rotation seal disc 17 can be positioned, so that the rotation seal disc 17 is fixed in the open or closed state.

[0034] Furthermore, a plurality of guide blocks 23 are axially provided on the outer wall of the annular cover 8, and a guide groove 22 matching the guide blocks 23 is axially provided on the inner wall of the sliding seal sleeve 18. The guide blocks 23 are slidably arranged in the guide grooves 22. As Figure 2 shown, due to the limitation of the guide blocks 23 and the guide grooves 22, the sliding seal sleeve 18 can be restricted to only axially slide and will not rotate, so as to control the opening and closing of the axial discharge port by its sliding. Furthermore, in order to realize the coupling movement between the sliding seal sleeve 18 and the rotation seal disc 17, as Figure 2 shown, a camshaft 24 is convexly provided on the outer circumferential wall of the rotation seal disc 17, and a cam track 25 is provided on the inner wall of the sliding seal sleeve 18 along a spiral line; the camshaft 24 is placed in the cam track 25 to form a cam fit. Figure 2Taking the shown as an example, three guiding grooves 22 are axially distributed on the inner wall of the sliding seal sleeve 18, and at the same time, there are three cam tracks 25 respectively, so that the guiding grooves 22 and the cam tracks 25 are alternately arranged on the inner wall in sequence. The cam track 25 is matched with the camshaft 24 to drive the sliding seal sleeve 18 to move axially back and forth, and the guiding groove 22 restricts the guiding; when the rotary seal disc 17 rotates, the camshaft 24 rotates around the axis to form a driving force, and then the movement of the sliding seal sleeve 18 is controlled through the cam cooperation, so as to realize the control of the opening and closing of the discharge port 7. It can be understood that in this embodiment, only one positioning screw 21 needs to be screwed and then rotated to control the opening and closing of all the discharge ports 7, thus greatly reducing the workload; and it can effectively avoid the problems caused by the omission of installing the drain plug 15 in the first embodiment. The operation of this embodiment is simpler and more efficient.

[0035] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A structure for cleaning a water outlet channel of a horizontal screw centrifuge, comprising a drum (1), wherein a spiral (2) is provided for rotation in the drum (1), and characterized in that: A large end cover (3) is provided at one end of the drum (1), a feed pipe (4) is provided through the large end cover (3) and along the axis of the drum (1), a centripetal pump impeller (5) is rotatably provided inside the large end cover (3), the inlet side of the centripetal pump impeller (5) is connected to the inside of the drum (1), and the outlet side is connected to a liquid outlet pipe (6), and the liquid outlet pipe (6) is sleeved on the outside of the feed pipe (4); a discharge port (7) is provided on the large end cover (3).

2. A cleaning structure for a water outlet channel of a horizontal screw centrifuge according to claim 1, characterized in that: The large end cover (3) comprises an annular cover (8) and a side cover (9); the annular cover (8) is sleeved on the outer periphery of the centripetal pump impeller (5); the side cover (9) is arranged on the outlet side of the centripetal pump impeller (5); the inlet side of the centripetal pump impeller (5) is provided with a large end liquid pan body (10) and a liquid retaining pan (11) for separating from the interior of the drum (1); the large end cover (3), the large end liquid pan body (10) and the liquid retaining pan (11) form a centripetal pump chamber (12); the centripetal pump impeller (5) is rotatably arranged in the centripetal pump chamber (12).

3. A cleaning structure for a water outlet channel of a horizontal screw centrifuge according to claim 2, characterized in that: The discharge port (7) is arranged on the annular cover (8) and the side cover (9), and a plurality of discharge ports (7) are evenly distributed around the annular cover (8) and the side cover (9), the discharge port (7) on the annular cover (8) is a circumferential discharge port (13), and the discharge port (7) on the side cover (9) is an end discharge port (14).

4. A cleaning structure for a water outlet channel of a horizontal screw centrifuge according to claim 3, characterized in that: The inner wall of the discharge port (7) is provided with an internal thread, a discharge screw plug (15) is threadedly connected to the discharge port (7), and a gasket (16) is tightly provided between the discharge screw plug (15) and the discharge port (7).

5. The water outlet channel cleaning structure of a horizontal screw centrifuge according to claim 3, characterized in that: The large end cover (3) is provided with a discharge blocking structure on the outside, and the discharge blocking structure comprises a rotating sealing disk (17) and a sliding sealing sleeve (18); the rotating sealing disk (17) is fitted on the outside of the side cover (9) and is rotatably connected relative to the large end cover (3); the sliding sealing sleeve (18) is an annular structure sleeved on the outer periphery of the annular cover (8), and the sliding sealing sleeve (18) is slidably connected relative to the drum (1) in the axial direction thereof; the sliding sealing sleeve (18) is driven by the rotating sealing disk (17), and when the rotating sealing disk (17) rotates relative to the drum (1), the sliding sealing sleeve (18) is driven to slide along the axial direction of the drum (1).

6. A cleaning structure for the outlet channel of a horizontal screw centrifuge according to claim 5, characterized in that: A slip ring groove (19) is provided on the outer periphery of the shaft of the large end cover (3); a rotating sleeve (27) matching the slip ring groove (19) is provided at the center of the rotating sealing disk (17); the slip ring groove (19) limits the axial movement of the rotating sealing disk (17); a plurality of positioning holes (20) for limiting the rotation angle of the rotating sealing disk (17) are provided on the slip ring groove (19); a positioning screw (21) is threadedly connected to the rotating sleeve (27); the positioning screw (21) matches the positioning hole (20) to position the rotating sealing disk (17).

7. A cleaning structure for a water outlet channel of a horizontal screw centrifuge according to claim 6, characterized in that: The outer wall of the annular cover (8) is provided with a plurality of guide blocks (23) along the axial direction, and the inner wall of the sliding sealing sleeve (18) is provided with guide grooves (22) matching with the guide blocks (23) along the axial direction, and the guide blocks (23) are slidably arranged in the guide grooves (22).

8. A cleaning structure for a water outlet channel of a horizontal screw centrifuge according to claim 7, characterized in that: A cam shaft (24) is provided on a protruding circumferential outer wall of the rotary sealing disk (17), and a cam track (25) is provided on the inner wall of the sliding sealing sleeve (18) along a spiral (2) line; the cam shaft (24) is placed in the cam track (25) to form a cam fit.

9. The water outlet channel cleaning structure of a horizontal screw centrifuge according to claim 5, characterized in that: The rotary sealing disk (17) is provided with a slag discharge hole (26) corresponding to the end discharge port (14); the rotational position of the rotary sealing disk (17) relative to the drum (1) changes to control the slag discharge hole (26) to overlap or misalign with the end discharge port (14); the axial position of the sliding sealing sleeve (18) changes to control it to expose or block the circumferential discharge port (13).

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