Channel switching device and switching method for discharging and draining of centrifugal machine

Abstract

The invention relates to the field of centrifugal machines, and discloses a channel switching device and method for discharging and draining of a centrifugal machine. The channel switching device comprises a supporting frame and a connecting component, the supporting frame comprises a fixed frame and a movable frame, and the movable frame is provided with a first mounting position and a second mounting position; the connecting component comprises a flexible connector, a first sealing disc and a second sealing disc, the first sealing disc is used for being connected with the discharging end of the centrifugal machine, and a first telescopic piece is arranged between the first sealing disc and the second sealing disc. According to the channel switching device, automatic switching of the discharging pipeline and the drainage pipeline can be achieved according to the operation stage of the centrifugal machine, automatic guiding-out of materials or waste water is achieved, manual participation is reduced or not needed, the labor cost is reduced, the working efficiency is improved, meanwhile, drainage and discharging are conducted separately through the corresponding pipelines, and the working efficiency is improved. And the phenomenon that the material index is unqualified due to the fact that part of wastewater enters downstream material receiving equipment when the centrifugal machine is used for dewatering is avoided.

Description

Technical Field

[0001] This invention relates to the field of centrifuges, and more specifically to a channel switching device and method for centrifuge discharge and drainage. Background Technology

[0002] Centrifuges, as high-speed solid-liquid separation equipment, are indispensable in the production of precursors. Currently, centrifuge unloading is achieved manually before feeding into downstream equipment, or using three-way flap valves or ball valves. Precursor materials are often powdery or granular and expensive. Manual feeding easily generates dust pollution, causing environmental damage, economic losses, and significant health risks to operators, while also being time-consuming and labor-intensive. Using three-way flap valves or ball valves presents challenges. The poor sealing performance of three-way flap valves allows some wastewater from the discharge port to flow into downstream equipment during the initial dehydration stage, leading to substandard material properties. Three-way ball valves are prone to clogging or material entering between the valve core and valve chamber, causing valve rotation jamming and contaminating downstream materials with metallic foreign objects, resulting in excessive levels of metallic contaminants. Therefore, current centrifuge unloading methods require manual discharge and drainage, increasing labor costs, reducing efficiency, and posing a risk of contaminating downstream materials. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a channel switching device and switching method for centrifuge discharge and drainage.

[0004] This invention provides a channel switching device for centrifuge discharge and drainage, comprising:

[0005] The support frame includes a fixed frame and a movable frame slidably disposed on the fixed frame. The movable frame is provided with a first mounting position for connecting to the end of a drainage pipe and a second mounting position for connecting to the end of a discharge pipe.

[0006] The connecting component includes a flexible connection and a first sealing plate and a second sealing plate disposed at both ends of the flexible connection. The first sealing plate is used to connect to the discharge end of the centrifuge. The movable frame can drive the drainage pipe or discharge pipe to move to a position corresponding to the second sealing plate. A first telescopic member is provided between the first sealing plate and the second sealing plate. The first telescopic member can drive the second sealing plate to move closer to or away from the end of the drainage pipe or discharge pipe corresponding to it.

[0007] Optionally, the fixed frame is provided with a second telescopic member, which is used to drive the movable frame to move.

[0008] Optionally, the fixed frame is a first rectangular frame, and the movable frame is capable of moving along the length of the first rectangular frame.

[0009] Optionally, the side of the first rectangular frame is provided with a sliding groove, the sliding groove extends along the length direction of the first rectangular frame, and the side of the movable frame is provided with a roller that rolls in cooperation with the sliding groove.

[0010] Optionally, the movable frame is a second rectangular frame, and the second rectangular frame is provided with a card plate. The card plate has a first mounting position through which the end of the drainage pipe can pass and a second mounting position through which the end of the discharge pipe can pass. The first mounting position and the second mounting position are spaced apart along the length direction of the second rectangular frame.

[0011] Optionally, the channel switching device further includes a dust removal device for being installed at the feed end of the downstream receiving device. When the moving frame drives the discharge pipe to move to a position corresponding to the second sealing disc, the end of the discharge pipe away from the second sealing disc is opposite to the feed inlet of the dust removal device.

[0012] Optionally, the dust removal device further includes a baffle for being disposed at the end of the discharge pipe, the baffle being used to cover the outer periphery of the feed inlet.

[0013] Optionally, the dust removal device includes a dust removal box, the feed inlet is disposed on the dust removal box, and the dust removal device further includes a dust removal cover for being disposed at the end of the discharge pipe, and when the moving frame drives all the drainage pipes to move to a position corresponding to the second sealing disc, the dust removal cover can block the feed inlet.

[0014] Optionally, the dust removal device further includes a receiving box disposed on the side of the dust removal box, and when the moving frame moves all the drainage pipes to a position corresponding to the second sealing plate, the end of the discharge pipe is opposite to the receiving position.

[0015] The present invention also provides a channel switching method for centrifuge discharge and drainage, comprising the following steps:

[0016] Step S1: When the centrifuge is feeding and backwashing, the first telescopic component drives the second sealing disc to move toward the first sealing disc. The moving frame drives the drain pipe and the discharge pipe to move, so that the end of the drain pipe is opposite to the position of the second sealing disc. The first telescopic component drives the second sealing disc to move toward the end of the drain pipe, so that the second sealing disc and the end of the drain pipe are sealed and connected. The wastewater flowing out of the centrifuge is discharged through the drain pipe.

[0017] In step S2, when the centrifuge scrapes and pulls the bag to discharge material, the first telescopic component drives the second sealing disc to move toward the direction of the first sealing disc. The moving frame drives the drainage pipe and the discharge pipe to move, so that the end of the discharge pipe is opposite to the position of the second sealing disc. The first telescopic component drives the second sealing disc to move toward the end of the discharge pipe, so that the second sealing disc and the end of the discharge pipe are sealed and connected. The material enters the downstream receiving equipment through the discharge pipe.

[0018] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0019] The channel switching device provided by this invention can automatically switch between the discharge pipe and the drainage pipe according to the operating stage of the centrifuge, realize the automatic export of materials or wastewater, reduce or eliminate manual intervention, reduce labor costs, and increase work efficiency. At the same time, drainage and material discharge are carried out separately through their respective pipes, which prevents the phenomenon of some wastewater entering the downstream receiving equipment during centrifuge dewatering, resulting in unqualified material indicators. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the channel switching device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure when the drainage pipe is connected to the second sealing disc according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure when the discharge pipe is connected to the second sealing disc according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram showing the connection between the discharge pipe and the dust collector according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the flexible connection in a compressed state according to an embodiment of the present invention;

[0027] Figure 6 This is a flowchart of the channel switching method according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. Fixed frame; 11. Second telescopic component; 12. Slide groove; 2. Moving frame; 21. Roller; 22. Clamping plate; 3. Drainage pipe; 4. Discharge pipe; 41. Baffle; 5. Connecting component; 51. Flexible connection; 52. First sealing disc; 53. Second sealing disc; 54. First telescopic component; 6. Dust removal device; 61. Dust removal box; 611. Feed inlet; 62. Dust removal cover; 63. Receiving box. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other.

[0031] The following description sets forth many specific details in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments described in the specification are only some, not all, of the embodiments of the invention.

[0032] Combination Figures 1 to 3 As shown, the channel switching device for centrifuge discharge and drainage provided in this embodiment of the invention includes a support frame and a connecting component 5.

[0033] The support frame includes a fixed frame 1 and a movable frame 2 slidably mounted on the fixed frame 1. The fixed frame 1 can be mounted on a support structure, and the design of the support structure is not limited, as long as it can support the fixed frame 1 and the movable frame 2 below the discharge end of the centrifuge. The movable frame 2 is slidably engaged with the fixed frame 1, allowing the movable frame 2 to move relative to the fixed frame 1 in a predetermined direction. The movable frame 2 has a first mounting position for connecting to the end of the drainage pipe 3 and a second mounting position for connecting to the end of the discharge pipe 4. In this design, the movable frame 2 can connect to the end of the drainage pipe 3 through the first mounting position and to one end of the discharge pipe 4 through the second mounting position, thereby supporting the ends of the drainage pipe 3 and the discharge pipe 4 below the discharge end of the centrifuge.

[0034] The connecting component 5 includes a flexible connector 51 and a first sealing disc 52 and a second sealing disc 53 disposed at both ends of the flexible connector 51. The flexible connector 51 is designed to allow the first sealing disc 52 and the second sealing disc 53 to move closer or further apart. The flexible connector 51 can be a bellows or similar material. The first sealing disc 52 is used to connect to the discharge end of the centrifuge, and the connection method can be bolted or similar. The movable frame 2 can move the drainage pipe 3 or the discharge pipe 4 to a position corresponding to the second sealing disc 53. That is, as the movable frame 2 moves, the positions of the drainage pipe 3 and the discharge pipe 4 change, so that the end of the drainage pipe 3 or the discharge pipe 4 connected to the movable frame 2 can move to a position corresponding to the second sealing disc 53. The first sealing disc 52 and the second sealing disc 53 can be fitted with sealing flanges to enhance the connection and sealing effect.

[0035] A first telescopic member 54 is provided between the first sealing disc 52 and the second sealing disc 53. The first telescopic member 54 can move the second sealing disc 53 closer to or further away from the end of its corresponding drainage pipe 3 or discharge pipe 4. The second telescopic member 11 can be an electric push rod, a cylinder, or a hydraulic cylinder, etc. Specifically, when the drainage pipe 3 or discharge pipe 4 is in place, the first telescopic member 54 can move the second sealing disc 53, causing the second sealing disc 53 to press against the drainage pipe 3 or discharge pipe 4. At this time, the flexible connection 51 is lengthened, increasing the tightness of the connection and preventing water or material leakage. Figure 5 As shown, when the position needs to be moved, the first telescopic member 54 drives the second sealing disc 53 to disengage from the drainage pipe 3 or the discharge pipe 4. At this time, the flexible connection 51 is compressed to provide clearance for the movement of the mobile frame 2, so as to avoid affecting the movement effect of the mobile frame 2.

[0036] The channel switching device provided by this invention can automatically switch between the discharge pipe 4 and the drainage pipe 3 according to the operating stage of the centrifuge, realize the automatic discharge of materials or wastewater, reduce or eliminate manual intervention, reduce labor costs, and increase work efficiency. At the same time, drainage and material discharge are carried out separately through their respective pipes, which prevents the phenomenon of some wastewater entering the downstream receiving equipment during centrifuge dewatering, resulting in unqualified material indicators.

[0037] In some implementations, such as Figure 1 As shown, the fixed frame 1 is equipped with a second telescopic member 11, which is used to drive the movable frame 2 to move. The second telescopic member 11 extends along the moving direction of the movable frame 2, so that the movable frame 2 can be moved along the moving direction of the movable frame 2 by means of the second telescopic member 11. By setting the second telescopic member 11, the position of the movable frame 2 can be automatically adjusted. The second telescopic member 11 can be an electric push rod, a cylinder, or a hydraulic cylinder, etc.

[0038] In some implementations, reference continues. Figure 1The fixed frame 1 is a first rectangular frame, and the movable frame 2 can move along the length of the first rectangular frame. The design of the first rectangular frame facilitates the movement of the movable frame 2 and increases its range of motion, ensuring that the movable frame 2 can move the drainage pipe 3 or the discharge pipe 4 to below the discharge end of the centrifuge.

[0039] In some embodiments, the side of the first rectangular frame is provided with a groove 12, which extends along the length of the first rectangular frame, and the side of the movable frame 2 is provided with a roller 21 that rolls with the groove 12.

[0040] Specifically, there are two slide grooves 12, which are respectively located on the two long sides of the first rectangular frame. There are four rollers 21, which are divided into two groups of two rollers 21 each. The two rollers 21 in each group are evenly distributed on the side of the movable frame 2. The rollers 21 pass through the slide grooves 12, so that the sliding engagement between the first rectangular frame and the movable frame 2 is achieved through the cooperation between the rollers 21 and the slide grooves 12, thereby increasing the smoothness of the movement of the movable frame 2.

[0041] In some embodiments, the movable frame 2 is a second rectangular frame, and two sets of rollers 21 are arranged opposite to each other on both sides of the second rectangular frame. The second rectangular frame is provided with a clamping plate 22, on which a first mounting position for the end of the drainage pipe 3 to pass through and a second mounting position for the end of the discharge pipe 4 to pass through are formed, and the first mounting position and the second mounting position are spaced apart along the length direction of the second rectangular frame.

[0042] Specifically, continue to refer to Figure 1 Both ends of the clamping plate 22 are provided with semi-circular openings, and the ends of the semi-circular openings are provided with ribs. The two ends of the ribs are respectively connected to the two corresponding sides of the second rectangular frame. The end of the drainage pipe 3 passes through the semi-circular opening and connects to the clamping plate 22 and the ribs. Similarly, the end of the discharge pipe 4 passes through the other semi-circular opening and connects to the corresponding clamping plate 22 and the ribs, so as to fix the drainage pipe 3 and the discharge pipe 4. This design means that the first mounting position and the second mounting position are located at both ends of the length direction of the clamping plate 22, so that the first mounting position and the second mounting position are spaced apart along the length direction of the second rectangular frame, which facilitates the position adjustment of the drainage pipe 3 and the discharge pipe 4.

[0043] Combination Figures 1 to 3 As shown, the channel switching device also includes a dust removal device 6 for installation at the feed end of the downstream receiving equipment, wherein the downstream receiving equipment may be a downstream drying equipment. Figure 3As shown, when the movable frame 2 moves the discharge pipe 4 to a position corresponding to the second sealing disc 53, the end of the discharge pipe 4 furthest from the second sealing disc 53 is aligned with the inlet 611 of the dust removal device 6. This allows the material discharged from the centrifuge to enter the dust removal device 6 for dust removal via the flexible connection 51 and the discharge pipe 4. The dust-removed material then enters the drying equipment. In this design, the end of the discharge pipe 4 furthest from the movable frame 2 moves synchronously with the movable frame 2, ensuring that the top of the discharge pipe 4 is sealed to the second sealing disc 53, and the bottom of the discharge pipe 4 is connected to the inlet 611 of the dust removal device 6, facilitating material discharge.

[0044] In some implementations, such as Figure 4 As shown, the dust removal device 6 also includes a baffle 41 for installation at the end of the discharge pipe 4, which covers the outer periphery of the feed inlet 611. By installing the baffle 41, the end of the feed inlet 611 can be covered, preventing dust from splashing. This reduces the dust removal area, forming a separate dust removal chamber. The dust removal function of the downstream equipment is utilized to create a negative pressure state, fully leveraging the dust removal function of the downstream receiving equipment.

[0045] The baffle 41 can be made of a soft material. In this case, the baffle 41 can be an annular baffle 41, and the diameter of the baffle 41 is larger than the diameter of the feed inlet 611. When the discharge pipe 4 moves to the vicinity of the feed inlet 611, the baffle 41 deforms under force after contacting the feed inlet 611. When the discharge pipe 4 moves above the feed inlet 611, the baffle 41 returns to its original position to cover the outer periphery of the end of the feed inlet 611 because there is no external force restricting it.

[0046] In addition, the baffle 41 can also be made of a rigid material. In this case, the baffle 41 has an opening on one side so that the feed inlet 611 can pass through the opening during the movement of the discharge pipe 4, so that the baffle 41 can cover the outer periphery of the end of the feed inlet 611.

[0047] As can be seen, the design of the baffle 41 in this application is not limited. It is only necessary to ensure that the baffle 41 can cover the outer periphery of the end of the feed inlet 611 after the discharge pipe 4 is moved into place.

[0048] Furthermore, the baffle 41 is fixed to the end of the discharge pipe 4 by a clamp, so as to achieve a detachable connection between the baffle 41 and the discharge pipe 4. By designing the clamp, the position of the baffle 41 in the vertical direction can be adjusted to ensure the material blocking effect of the baffle 41.

[0049] Continue to refer to Figures 1 to 3The dust removal device 6 includes a dust collection box 61, with an inlet 611 disposed on the dust collection box 61 to receive materials. The dust removal device 6 also includes a dust cover 62 disposed at the end of the discharge pipe 4, the dust cover 62 being disposed perpendicular to the extension direction of the discharge pipe 4. When the moving frame 2 moves all the drainage pipes 3 to a position corresponding to the second sealing disc 53, the dust cover 62 can block the inlet 611. The end of the drainage pipe 3 away from the moving frame 2 is bent and extended to avoid the dust collection box 61. The end of the drainage pipe 3 away from the moving frame 2 extends into the wastewater container, avoiding frequent disassembly and installation of temporary pipes. During movement, the drainage pipe 3 does not detach from the wastewater container, ensuring drainage effectiveness and preventing environmental pollution. Furthermore, the end of the drainage pipe 3 can also be connected to the wastewater container via a flexible pipe, ensuring effective connection between the drainage pipe 3 and the wastewater container while avoiding interference with the movement of the drainage pipe 3.

[0050] In this design, when the centrifuge is draining water, the feed inlet 611 is blocked by the dust cover 62 to further prevent wastewater from entering subsequent equipment.

[0051] In some embodiments, the dust removal device 6 also includes a receiving box 63 disposed on the side of the dust removal box 61, and when the moving frame 2 moves all the drainage pipes 3 to the position corresponding to the second sealing plate 53, the end of the discharge pipe 4 is opposite to the position after receiving the material.

[0052] With this design, during drainage operations, the material remaining on the inner wall of the discharge pipe 4 can fall into the receiving box 63 to avoid polluting the surrounding environment.

[0053] In a further optimized manner, the receiving box 63 and the dust collection box 61 are detachably connected, so that after the receiving box 63 receives the material, the material can be detached to pour out the material, and then the receiving box 63 can be reinstalled to continue receiving, which increases the convenience of operation and makes it easier for staff to recycle materials.

[0054] The detachable connection method between the receiving box 63 and the dust collection box 61 is not limited. For example, it can be connected by snap-fit ​​or bolt. These are not restrictive and can be designed according to actual needs.

[0055] The discharge pipe 4, drainage pipe 3, dust collector 61, dust collector cover 62, and receiving box 63 of this application are all made of non-metallic materials to avoid the generation of metallic foreign objects due to wear of materials.

[0056] This design allows for a channel switching device during centrifuge discharge and drainage. Different channels can be selected via cylinders, automatically switching according to different operating stages of the centrifuge. The first sealing disc 52 of the connecting component 5 is connected to the centrifuge outlet flange. Depending on the centrifuge's operating stage, the movement of the moving frame 2 and the connecting component 5 can switch to the corresponding channel. This device enables automatic channel switching, effectively reducing manual labor intensity and minimizing material index anomalies caused by wastewater entering the downstream receiving equipment. Simultaneously, the channel switching device is equipped with a dust removal device 6 during discharge. The dust removal cover 62 and dust hood of the dust removal device 6 work together to reduce the dust removal area, forming a separate dust removal chamber. Utilizing the dust removal function of the downstream equipment, it creates a negative pressure state, fully leveraging the dust removal function of the downstream receiving equipment.

[0057] like Figure 6 As shown, the present invention also provides a channel switching method for centrifuge discharge and drainage, comprising the following steps:

[0058] In step S1, when the centrifuge is feeding and backwashing, the first telescopic member 54 drives the second sealing disc 53 to move toward the first sealing disc 52. At this time, the flexible connection 51 retracts to provide clearance for the movement of the moving frame 2. The moving frame 2 drives the drain pipe 3 and the discharge pipe 4 to move, so that the end of the drain pipe 3 is opposite to the position of the second sealing disc 53. The first telescopic member 54 drives the second sealing disc 53 to move toward the end of the drain pipe 3, so that the second sealing disc 53 is sealed and connected to the end of the drain pipe 3. The wastewater flowing out of the centrifuge is discharged through the drain pipe 3.

[0059] In step S2, when the centrifuge scrapes and pulls the bag to discharge material, the first telescopic component 54 drives the second sealing disc 53 to move towards the first sealing disc 52. At this time, the flexible connection 51 retracts to provide clearance for the movement of the moving frame 2. The moving frame 2 drives the drainage pipe 3 and the discharge pipe 4 to move, so that the end of the discharge pipe 4 is opposite to the position of the second sealing disc 53. The first telescopic component 54 drives the second sealing disc 53 to move towards the end of the discharge pipe 4, so that the second sealing disc 53 is sealed and connected to the end of the discharge pipe 4. The material enters the downstream receiving equipment through the discharge pipe 4 without any dust overflow.

[0060] Specifically, continue to refer to Figure 6During operation, the centrifuge's spindle speed serves as the operating condition for the channel switching device. When the "Automatic Start" button is pressed (or the "Feeding Speed" button is pressed), the centrifuge enters the feeding phase. When the spindle speed reaches the set feeding value, the channel switching device switches to the drainage side. At this time, drainage pipe 3 connects to the centrifuge's discharge end. If the spindle speed consistently fails to reach the feeding value, the equipment alarms. After manual inspection and handling, the channel switching device resumes operation. After drainage is complete, the limit switch on the drainage side closes (if it does not close, the equipment alarms, requiring manual inspection and handling), the drainage channel position indicator light illuminates, and the centrifuge executes the feeding command. After feeding, the centrifuge enters the cleaning phase. Next, after dehydration, the centrifuge enters the scraping phase. When the spindle speed reaches the scraping value, the channel switching device switches to the discharge side (or, when the "Scraping Speed" button is pressed, the channel switching device switches to the discharge side). At this time, discharge pipe 4 connects to the centrifuge's discharge end. Similarly, if the spindle speed consistently fails to reach the set value for scraping, the equipment will alarm. After manual inspection and handling, the channel switching device will activate. The limit switch on the discharge side will close (if it is not closed, the equipment will alarm and require manual inspection and handling), the indicator light on discharge pipe 4 will illuminate (if it is not illuminated, the equipment will alarm and require manual inspection and handling), the centrifuge will execute the scraping command, and after completing the scraping, the centrifuge will enter the bag-pulling stage, at which point the centrifuge will cease operation.

[0061] The channel switching method for centrifuge discharge and drainage provided by the present invention is implemented by the aforementioned channel switching device for centrifuge discharge and drainage.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A channel switching device for centrifuge discharge and drainage, characterized in that, include: The support frame includes a fixed frame (1) and a movable frame (2) slidably disposed on the fixed frame (1). The movable frame (2) is provided with a first mounting position for connecting to the end of the drainage pipe (3) and a second mounting position for connecting to the end of the discharge pipe (4). The connecting component (5) includes a flexible connection (51) and a first sealing disc (52) and a second sealing disc (53) disposed at both ends of the flexible connection (51). The first sealing disc (52) is used to connect to the discharge end of the centrifuge. The movable frame (2) can drive the drainage pipe (3) or the discharge pipe (4) to move to the position corresponding to the second sealing disc (53). A first telescopic member (54) is provided between the first sealing disc (52) and the second sealing disc (53). The first telescopic member (54) can drive the second sealing disc (53) to move closer to or away from the end of the drainage pipe (3) or the discharge pipe (4) corresponding to it.

2. The channel switching device for centrifuge discharge and drainage according to claim 1, characterized in that, The fixed frame (1) is provided with a second telescopic member (11), which is used to drive the movable frame (2) to move.

3. The channel switching device for centrifuge discharge and drainage according to claim 1, characterized in that, The fixed frame (1) is a first rectangular frame, and the movable frame (2) can move along the length direction of the first rectangular frame.

4. The channel switching device for centrifuge discharge and drainage according to claim 3, characterized in that, The first rectangular frame has a sliding groove (12) on its side, the sliding groove (12) extends along the length of the first rectangular frame, and the side of the movable frame (2) has a roller (21) that rolls with the sliding groove (12).

5. The channel switching device for centrifuge discharge and drainage according to claim 1, characterized in that, The movable frame (2) is a second rectangular frame. The second rectangular frame is provided with a card plate (22). The card plate (22) has a first mounting position through which the end of the drainage pipe (3) can pass and a second mounting position through which the end of the discharge pipe (4) can pass. The first mounting position and the second mounting position are spaced apart along the length direction of the second rectangular frame.

6. The channel switching device for centrifuge discharge and drainage according to any one of claims 1 to 5, characterized in that, The channel switching device also includes a dust removal device (6) for setting at the feed end of the downstream receiving equipment. When the moving frame (2) moves the discharge pipe (4) to a position corresponding to the second sealing disc (53), the end of the discharge pipe (4) away from the second sealing disc (53) is opposite to the feed inlet (611) of the dust removal device (6).

7. The channel switching device for centrifuge discharge and drainage according to claim 6, characterized in that, The dust removal device (6) also includes a baffle (41) for being disposed at the end of the discharge pipe (4), the baffle (41) being used to cover the outer periphery of the feed inlet (611).

8. The channel switching device for centrifuge discharge and drainage according to claim 6, characterized in that, The dust removal device (6) includes a dust removal box (61), the feed inlet (611) is disposed on the dust removal box (61), the dust removal device (6) also includes a dust removal cover (62) for being disposed at the end of the discharge pipe (4), and when the moving frame (2) drives all the drainage pipes (3) to move to the position corresponding to the second sealing plate (53), the dust removal cover (62) can block the feed inlet (611).

9. The channel switching device for centrifuge discharge and drainage according to claim 8, characterized in that, The dust removal device (6) also includes a receiving box (63) disposed on the side of the dust removal box (61), and when the moving frame (2) moves all the drainage pipes (3) to a position corresponding to the second sealing plate (53), the end of the discharge pipe (4) is opposite to the receiving position.

10. A channel switching method for centrifuge discharge and drainage, characterized in that, Includes the following steps: Step S1: When the centrifuge is feeding and backwashing, the first telescopic component (54) drives the second sealing disc (53) to move toward the first sealing disc (52), and the moving frame (2) drives the drain pipe (3) and the discharge pipe (4) to move, so that the end of the drain pipe (3) is opposite to the position of the second sealing disc (53). The first telescopic component (54) drives the second sealing disc (53) to move toward the end of the drain pipe (3), so that the second sealing disc (53) and the end of the drain pipe (3) are sealed and connected, and the wastewater flowing out of the centrifuge is discharged through the drain pipe (3). In step S2, when the centrifuge scrapes and pulls the bag to discharge material, the first telescopic component (54) drives the second sealing disc (53) to move toward the first sealing disc (52), and the moving frame (2) drives the drainage pipe (3) and the discharge pipe (4) to move, so that the end of the discharge pipe (4) is opposite to the position of the second sealing disc (53). The first telescopic component (54) drives the second sealing disc (53) to move toward the end of the discharge pipe (4), so that the second sealing disc (53) and the end of the discharge pipe (4) are sealed and connected. The material enters the downstream receiving equipment through the discharge pipe (4).

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