Flexible material separating apparatus and method of screening

Abstract

The application provides a flexible material distributing device and a screening method, which replaces the existing vibration drive with a liquid medium drive to effectively reduce the noise of the screening device, and the flowing liquid medium can maximally reduce the damage to the material, reduce the damage rate of the material, ensure the screening quality, and can also select the surface height of the liquid medium, the height of the anti-stacking plate and the type of the screening plate according to the parameters such as the density and volume of the material, so that the same device can cope with the screening of different materials, and if the parameters such as the density and volume of different materials are similar, one device can screen two different materials.

Description

Technical Field

[0001] This application relates to the field of material screening equipment technology, and in particular to a flexible material distribution device and screening method. Background Technology

[0002] Material sorting equipment is an indispensable part of industrial automated production. Through different working principles and structural designs, it achieves the classification, distribution, and conveying of materials. Commonly used types include vibrating distributors, cyclone distributors, electromagnetic distributors, fixed screens, drum screens, vibrating screens, and belt conveyors. In practical use, these devices have four main drawbacks: 1. High noise levels; 2. Poor material versatility; 3. Some degree of damage to the outer surface of the raw material; 4. Poor adjustability of the feeding point; 5. Some distributors have uncontrollable size and occupy a large space. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems by providing a flexible material distribution device and a screening method.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, this application provides a flexible material distribution device, the device comprising:

[0006] The screening tank has a screening channel, a correction channel and a discharge channel. The first and last ends of the correction channel are connected to the screening channel. The discharge channel is connected to the screening channel. The screening tank contains a liquid medium. Material floats on the upper surface of the liquid medium. The material has a qualified posture and a disqualified posture on the liquid medium.

[0007] A flow aid mechanism is used to circulate the liquid medium between the screening channel and the correction channel. The flow aid mechanism is further used to unidirectionally flow the liquid medium from the screening channel toward the discharge channel.

[0008] A flipping mechanism, installed inside the correction channel, is used to flip the material inside the correction channel;

[0009] A screening plate is installed in the screening channel, and there is a gap X1 between the screening plate and the upper surface of the liquid medium. The screening plate is used to guide the material in the qualified position to the discharge channel and to guide the material in the unqualified position to the correction channel.

[0010] The screening channel is also equipped with:

[0011] An anti-overlap plate is installed vertically within the screening channel, with a gap of X2 between the lower surface of the anti-overlap plate and the upper surface of the liquid medium.

[0012] A distance sensor is used to detect the distance Z1 between the top surface of the material and the upper surface of the liquid medium in a disqualified state, and to detect the distance Z2 between the top surface of the material and the upper surface of the liquid medium in a qualified state, wherein Z2>Z1.

[0013] Among them, 2*Z2>X1>Z2; Z2>X2>Z1.

[0014] Secondly, this application also provides a screening method based on the flexible material distribution equipment described above;

[0015] The device further includes:

[0016] A liquid ripple sensor is installed inside the screening channel to detect the degree of surface undulation of the liquid medium.

[0017] The controller is electrically connected to the first liquid pump, the second liquid pump, the distance sensor, and the liquid ripple sensor;

[0018] The screening method includes the following steps:

[0019] S1. Place the material on the stationary liquid medium and measure the distance Z1 between the top surface of the material and the upper surface of the liquid medium in the disqualified posture, and the distance Z2 between the top surface of the material and the upper surface of the liquid medium in the qualified posture.

[0020] S2. Adjust the interval X1 between the lower surface of the anti-overlapping plate and the upper surface of the liquid medium, and select the screening plate with X1>Z2 to install in the screening channel, where X2 is the interval between the screening plate and the upper surface of the liquid medium.

[0021] S3. Start the first liquid pump and the second liquid pump, and pour the material into the screening channel through the hopper. The anti-stacking plate separates the stacked materials into individual materials that float on the liquid medium.

[0022] S4. The material in the qualified position flows into the discharge channel by relying on the surface of the screening plate and the flow of the liquid medium. The material in the unqualified position enters the correction channel through the screening plate and proceeds to step S5.

[0023] S5. Turbulence is formed on the upper surface of the liquid medium in the correction channel by the injection pump, and gas is injected into the material by the jet pump, causing the material to flip.

[0024] S6. The material enters the sieve channel from the buffer channel, and step S1 is repeated;

[0025] In step S4, an error detection method is further included;

[0026] The error detection method includes: S41. When the distance sensor detects that Z1>X2 or Z2<X2, a first signal is sent to the controller, and the controller stops the first liquid pump and the second liquid pump according to the first signal. Or when the liquid ripple sensor detects that the surface fluctuation degree of the liquid medium exceeds the threshold value, a second signal is sent to the controller, and the controller reduces the power of the first liquid pump until the surface fluctuation degree of the liquid medium is lower than the threshold value.

[0027] The advantages or beneficial effects in the above technical solutions at least include:

[0028] By replacing the existing vibration drive with the form of driving the material forward by a liquid medium, the noise of the screening equipment is effectively reduced, and the flowing liquid medium will minimize the damage to the material, reduce the damage rate of the material, ensure the screening quality, and the surface height of the liquid medium, the height of the anti-overlapping plate, and the type of the sieve plate can be selected according to parameters such as the density and volume of the material. The same equipment can be used to screen a variety of different materials. If the density and volume and other parameters of different types of materials are similar, one device can also screen two different materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings illustrate exemplary embodiments of the present application in embodiments of the present invention and are used together with the description to explain the principles of the present application. These drawings are included to provide a further understanding of the present application, and the drawings are included in this specification and form a part of this specification.

[0030] Figure 1 Shows a schematic structural diagram of the device in an embodiment of the present invention;

[0031] Figure 2 Shows a schematic diagram of the liquid flow direction of the screening tank in an embodiment of the present invention, where the black arrow represents the flow direction of the liquid medium;

[0032] Figure 3 Shows a schematic diagram of the position of the discharge liquid pipe in an embodiment of the present invention;

[0033] Figure 4 Shows a schematic structural diagram of the device with the hopper hidden in an embodiment of the present invention;

[0034] Figure 5 Shows a schematic diagram of the operation of the sieve plate in an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the water level line of the liquid medium according to an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of the operation of the anti-overlapping plate according to an embodiment of the present invention is shown;

[0037] Figure 8 A schematic diagram showing the location of X2 in an embodiment of the present invention is shown;

[0038] Figure 9 A schematic diagram of the operation of the jet pump according to an embodiment of the present invention in a first embodiment is shown;

[0039] Figure 10 A schematic diagram of the operation of the jet pump according to an embodiment of the present invention in a second embodiment is shown;

[0040] Figure 11 A schematic diagram of the first operation of the jet pump according to an embodiment of the present invention in a third embodiment is shown;

[0041] Figure 12 A second operational schematic diagram of the jet pump according to an embodiment of the present invention is shown in a third embodiment;

[0042] Figure 13 A schematic diagram of the disassembly of the screening plate according to an embodiment of the present invention is shown;

[0043] Reference numerals: 10, screening tank; 11, screening channel; 111, anti-overlap plate; 1112, distance sensor; 1113, vibrator; 112, screening plate; 12, correction channel; 13, discharge channel; 14, buffer channel; 141, wave baffle; 20, flow aid mechanism; 21, return liquid pipe; 211, first liquid pump; 22, discharge liquid pipe; 221, second liquid pump; 30, tilting mechanism; 31, jet pump; 311, camera; 32, jet pump; 40, hopper; 41, splash guard; 50, guide plate; 60, liquid ripple sensor; 70, controller; 80, material. Detailed Implementation

[0044] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0045] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0047] It should be noted that the terms "one" and "more" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0048] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0049] Reference Figure 1 A flexible material distribution device, specifically, is a material distribution device that uses a flexible flow medium, such as a liquid medium, to move material 80. The material 80 has a qualified posture and a disqualified posture on the liquid medium, which can be simply referred to as the front and the back. Preferably, the height of the front posture of the material 80 on the liquid medium is lower than the height of the back posture. In this application, the material 80 is exemplified by a double gear consisting of two coaxial large gears and a small gear stacked together in the height direction.

[0050] The aforementioned equipment includes:

[0051] Screening tank 10, which includes screening channel 11, correction channel 12, discharge channel 13, and buffer channel, such as Figure 2 As shown, the first end of the correction channel 12 is connected to the screening channel 11, and the last end is connected to the screening channel 11 through a buffer channel. The discharge channel 13 is connected to the screening channel 11. There is a liquid medium in the screening pool 10, and material 80 floats on the upper surface of the liquid medium. Preferably, the liquid medium is one of water, oil or mercury.

[0052] The flow-aiding mechanism 20 is used to circulate the liquid medium between the screening channel 11, the buffer channel 14, and the correction channel 12. Specifically, the liquid medium flows from the screening channel 11 into the correction channel 12, then from the correction channel 12 into the buffer channel 14, and then from the buffer channel 14 back into the screening channel 11. Furthermore, a wave-damping plate 141 is installed between the buffer channel 14 and the screening channel 11. The wave-damping plate 141 can calm the waves on the surface of the liquid medium entering the screening channel 11 from the buffer channel 14, reducing screening errors. In addition, the flow-aiding mechanism 20 is also used to unidirectionally flow the liquid medium in the screening channel 11 towards the discharge channel 13.

[0053] Specifically, the flow-aiding mechanism 20 includes: a return liquid pipe 21, the first end of which is connected to the portion between the screening channel 11 and the correction channel 12, and the second end of which is connected to the buffer channel; a first liquid pump 211, installed on the return liquid pipe 21, for pumping the liquid medium from the first end of the return liquid pipe 21 to the second end of the return liquid pipe 21; a discharge liquid pipe 22, installed at the bottom of the discharge channel 13, the first end of which is connected to the bottom of the discharge channel 13, and the second end of which is connected to the portion between the screening channel 11 and the correction channel 12, the first end of the discharge liquid pipe 22 being equipped with a mesh plate, which can prevent material 80 from falling into the discharge liquid pipe 22; and a second liquid pump 221, installed on the discharge liquid pipe 22, for pumping the water flow from the first end of the discharge liquid pipe 22 to the second end.

[0054] The following components are installed in the screening channel 11 described above:

[0055] Screening plate 112, such as Figure 4 and Figure 5 As shown, the screening plate 112 has a hollowed-out portion in the middle, and there is a gap X2 between the hollowed-out portion of the screening plate 112 and the upper surface of the liquid medium. The screening plate 112 is used to guide the material 80 in the qualified state to the discharge channel 13, and to guide the material 80 in the disqualified state to the correction channel 12, as shown. Figure 5 As shown, material 80 in a disqualified posture will pass directly through the hollow part, while material 80 in a qualified posture will be blocked by the upper part of the screening plate 112, thus preventing it from entering the correction channel 12. It will flow into the discharge channel for discharge as the screening plate 112 is oriented and the liquid medium flows.

[0056] The anti-stacking plate 111 is vertically movable and installed inside the screening channel 11. The function of the anti-stacking plate 111 is to prevent the material 80 from stacking vertically. Figure 7As shown, when the stacked material 80 passes through the anti-overlapping plate 111, the upper material 80 will be blocked and thus fall. And a vibrator 1113 is installed on the anti-overlapping plate 111. The vibrator 1113 is used to vibrate the anti-overlapping plate 111, which can strengthen the exclusion of the stacked material 80. There is a gap X1 between the lower surface of the anti-overlapping plate 111 and the upper surface of the liquid medium.

[0057] A distance sensor 1112 is used to detect the distance Z1 between the top surface of the material 80 and the upper surface of the liquid medium in the unqualified posture, and to detect the distance Z2 between the top surface of the material 80 and the upper surface of the liquid medium in the qualified posture. And Z2 > Z1. The distance sensor 1112 is installed on one side of the anti-overlapping plate 111 close to the discharge channel 13.

[0058] In the above, 2*Z2 > X1 > Z2; if X1 < Z2, the material 80 will not be able to pass through the anti-overlapping plate 111. If X1 > 2*Z2, the anti-overlapping plate 111 will lose its anti-overlapping function. Z2 > X2 > Z1. If X2 > Z2, the qualified material 80 will also flow into the correction channel 12. If X2 < Z1, neither the qualified material 80 nor the unqualified material 80 will be able to pass through the screening plate 112, resulting in the failure of the screening plate 112.

[0059] Then, the device further includes: a flipping mechanism 30 installed in the correction channel 12 for flipping the material 80 in the correction channel 12. Specifically, the flipping mechanism 30 includes:

[0060] An injection liquid pump 32 is installed at the front end of the correction channel 12. The injection end of the injection liquid pump 32 faces the rear end of the correction channel 12. The injection liquid pump 32 is used to absorb the liquid medium and inject the liquid medium towards the material 80, so as to form a turbulent flow on the upper surface of the liquid medium in the correction channel 12, causing the material 80 to flip.

[0061] An air jet pump 31 is installed at the upper end of the correction channel 12, and the air jet end of the air jet pump 31 is arranged downward. The air jet pump is used to jet gas towards the material 80, causing the material 80 to flip. A camera 311 is installed on the air jet pump 31. The camera 311 is used to detect whether the material 80 passes under the air jet pump. If so, it controls the air jet pump to jet gas towards the material 80.

[0062] This application has two embodiments in the installation position of the injection liquid pump 32:

[0063] Example 1: The surface of the liquid medium at the injection end of the injection pump 32 is flush with the surface of the material 80. The injection pump 32 sprays the liquid medium onto the surface of the material 80. The material 80 will flip under the strong impact. At the same time, the camera 311 detects the passing of the material 80 and controls the jet pump 31 to spray downwards, further assisting the flipping of the material 80. Figure 9 The upper, middle, and lower parts are shown in the diagram.

[0064] Example 2: The jet pump 32 is installed below the surface of the liquid medium. The water jet from the jet pump 32 causes the water level on the left side of the material 80 to suddenly increase, causing the left side of the material 80 to tilt. At the same time, the camera 311 detects that the material 80 is passing by and controls the jet pump 31 to spray downwards, further assisting the material 80 to flip. There is a distance Y between the jet end of the jet pump 32 and the surface of the liquid medium. Wherein, the distance Y < 2cm. If the distance Y is greater than 2cm, the effect of the jet pump 32 in increasing the water level by spraying high-pressure liquid is not obvious, which is not conducive to the flipping of the disqualified material 80.

[0065] Example 3: The jet pump 32 is installed below the surface of the liquid medium. There is a distance Y between the jetting end of the jet pump 32 and the surface of the liquid medium, where the distance Y > 2 cm. The jetting end of the jet pump 32 is positioned upwards, and there is an angle A between the jetting end of the jet pump 32 and the horizontal plane, where the angle A = 30°~45°. Figure 11 As shown, compared to Embodiment 2, the water jet from the injection pump 32 can more significantly raise the water level on one side of the material 80, making it easier for the material 80 in a disqualified position to flip over. Combined with the downward air jet from the air jet pump 31, this further assists in flipping the material 80. It should be noted that the injection pump 32 can spray intermittently or continuously. Figure 12 As shown, regardless of whether the spray angle is on the left or right side of the material 80, it can significantly flip one side of the material 80.

[0066] Of course, although the flipping mechanism 30 can flip the material 80, it has been shown in a limited number of experiments that the flipping rate still cannot reach 100%, as shown in Table 1. However, it can still ensure that some of the material 80 flips from the disqualified posture to the qualified posture. After flipping to the qualified posture, it flows back into the screening channel 11 for screening.

[0067]

[0068] Table 1

[0069] Following this, the equipment further includes

[0070] Hopper 40 is used to feed material 80 into screening channel 11;

[0071] A splash guard 41 is installed below the discharge port of the hopper 40, and the splash guard 41 is inclined toward the discharge channel 13.

[0072] A guide plate 50 is installed in the screening channel 11 to guide the material 80 to the screening plate 112. The screening plate 112 is detachably installed in the screening channel 11.

[0073] A partition plate is installed between the screening channel 11 and the correction channel 12. The front end and the rear end of the partition plate are spaced apart from the inner wall of the screening tank 10. The side of the partition plate near the correction channel 12 also has an arc-shaped surface.

[0074] Embodiments of the present invention also provide a screening method based on the above-described flexible material distribution equipment;

[0075] The equipment further includes:

[0076] A liquid ripple sensor 60 is installed inside the screening channel 11 to detect the degree of surface ripple in the liquid medium.

[0077] The controller 70 is electrically connected to the first liquid pump 211, the second liquid pump 221, the distance sensor 1112, and the liquid ripple sensor 60;

[0078] Specifically, the screening method includes the following steps:

[0079] S1. Place material 80 on a static liquid medium and measure the distance Z1 between the top surface of material 80 and the upper surface of the liquid medium in the disqualified posture, and the distance Z2 between the top surface of material 80 and the upper surface of the liquid medium in the qualified posture.

[0080] S2. Adjust the gap X1 between the lower surface of the anti-overlapping plate 111 and the upper surface of the liquid medium, and select a screening plate 112 with X1>Z2 to install in the screening channel 11. X2 is the gap between the screening plate 112 and the upper surface of the liquid medium.

[0081] S3. Start the first liquid pump 211 and the second liquid pump 221, and pour the material 80 into the screening channel 11 through the hopper 40. The anti-overlap plate 111 divides the stacked material 80 into a single material 80 that floats on the liquid medium.

[0082] S4. Material 80 in a qualified state leans against the surface of the screening plate 112 and flows into the discharge channel 13 with the flow of the liquid medium. Material 80 in a disqualified state enters the correction channel 12 through the screening plate 112 and proceeds to step S5.

[0083] S5. The liquid medium on the upper surface in the calibration channel 12 is made to form a turbulent flow by the injection liquid pump 32, and the jet pump sprays gas onto the material 80, causing the material 80 to turn over;

[0084] S6. The material 80 enters the sieve channel 11 from the buffer channel 14 and repeats the steps of S1;

[0085] In step S4, an error detection method is further included;

[0086] The error detection method includes: S41. When the distance sensor 1112 detects that Z1>X2 or Z2<X2, it sends a first signal to the controller 70, and the controller 70 stops the first liquid pump 211 and the second liquid pump 221 according to the first signal. Or when the liquid ripple sensor 60 detects that the surface fluctuation degree of the liquid medium exceeds the threshold value, it sends a second signal to the controller 70, and the controller 70 reduces the power of the first liquid pump 211 according to the second signal until the surface fluctuation degree of the liquid medium is lower than the threshold value.

[0087] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present application.

[0088] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present application, rather than limiting the scope of the present application. For those skilled in the art, other changes or variations can be made based on the above disclosure, and these changes or variations are still within the scope of the present application.

Claims

1. A flexible portioning apparatus, characterized by: The device comprises: A screening pool (10) having a screening flow channel (11), a correction flow channel (12) and a discharge flow channel (13) inside, the correction flow channel (12) being in communication with the screening flow channel (11) at both the head end and the tail end, and the discharge flow channel (13) being in communication with the screening flow channel (11), the screening pool (10) having a liquid medium inside, and a material (80) floating on the upper surface of the liquid medium, wherein the posture of the material (80) on the liquid medium has a qualified posture and an unqualified posture; A flow assisting mechanism (20) for circulating the liquid medium between the screening flow channel (11) and the correction flow channel (12), and further for unidirectionally flowing the liquid medium from the screening flow channel (11) to the discharge flow channel (13); A turnover mechanism (30) installed in the correction flow channel (12) for turning over the material (80) in the correction flow channel (12); A screening plate (112) is installed in the screening flow channel (11), and has a spacing X2 with the upper surface of the liquid medium, the screening plate (112) being used for guiding the material (80) in the qualified posture to the discharge flow channel (13), and guiding the material (80) in the unqualified posture to the correction flow channel (12); The screening flow channel (11) further has: An anti-stacking plate (111) movably installed in the screening flow channel (11), and having a spacing X1 between the lower surface of the anti-stacking plate (111) and the upper surface of the liquid medium; A distance sensor (1112) for detecting the distance Z1 between the top surface of the material (80) in the unqualified posture and the upper surface of the liquid medium, and detecting the distance Z2 between the top surface of the material (80) in the qualified posture and the upper surface of the liquid medium, and Z2>Z1; Wherein, 2*Z2>X1>Z2; Z2>X2>Z1; the screening pool (10) further has a buffer flow channel (14) between the screening flow channel (11) and the correction flow channel (12), and a wave blocking plate (141) is installed between the buffer flow channel (14) and the screening flow channel (11); The flow assisting mechanism (20) comprises: A reflux liquid pipe (21) having a first end connected with the part between the screening flow channel (11) and the correction flow channel (12), and a second end connected with the buffer flow channel (14); A first liquid pump (211) installed on the reflux liquid pipe (21) for pumping the liquid medium at the first end of the reflux liquid pipe (21) to the second end of the reflux liquid pipe (21); A discharge liquid pipe (22) is installed at the bottom of the discharge channel (13). The first end of the discharge liquid pipe (22) is connected to the bottom of the discharge channel (13), and the second end is connected to the part between the screening channel (11) and the correction channel (12). A grid plate is installed at the first end of the discharge liquid pipe (22). The second liquid pump (221) is installed on the discharge liquid pipe (22) and is used to pump the water flow from the first end of the discharge liquid pipe (22) to the second end.

2. The flexible portioning apparatus of claim 1, wherein: The flipping mechanism (30) includes: A liquid injection pump (32) is installed at the front end of the correction channel (12), with the injection end of the liquid injection pump (32) facing the rear end of the correction channel (12). The liquid injection pump (32) is used to absorb the liquid medium and spray the liquid medium toward the material (80) so that turbulence is formed on the upper surface of the liquid medium in the correction channel (12), causing the material (80) to flip.

3. The flexible material distribution equipment according to claim 2, characterized in that: The injection end of the jet pump (32) is flush with the surface of the liquid medium.

4. The flexible material distribution equipment according to claim 3, characterized in that: The injection pump (32) is installed below the surface of the liquid medium, and there is a distance Y between the injection end of the injection pump (32) and the surface of the liquid medium, wherein the distance Y < 2 cm.

5. The flexible portioning apparatus of claim 4, wherein: The jet pump (32) is positioned with its jet end facing upwards, and the jet end of the jet pump (32) has an angle A with the horizontal plane, wherein the angle A is 30° to 45°.

6. The flexible material distribution equipment according to claim 4 or 5, characterized in that: The flipping mechanism (30) further includes: A jet pump (31) is installed at the upper end of the correction channel (12), and the jet end of the jet pump (31) is arranged downward. The jet pump is used to spray gas onto the material (80) so that the material (80) flips. A camera (311) is installed on the jet pump (31). The camera (311) is used to detect whether the material (80) passes under the jet pump. If so, the jet pump is controlled to spray air onto the material (80).

7. The flexible material distribution equipment according to claim 6, characterized in that: A vibrator (1113) is installed on the anti-overlap plate (111), and the vibrator (1113) is used to vibrate the anti-overlap plate (111); The distance sensor (1112) is installed on the side of the anti-overlap plate (111) near the discharge channel (13).

8. The flexible material distribution equipment according to claim 7, characterized in that: The device further includes: The hopper (40) is used to feed the material (80) into the screening channel (11). A splash guard (41) is installed below the discharge port of the hopper (40), and the splash guard (41) is inclined toward the discharge channel (13); The guiding plate (50) is installed in the screening flow channel (11) and is used to guide the material (80) to flow towards the screening plate (112). The screening plate (112) is detachably installed in the screening flow channel (11). The liquid medium is water or oil.

9. A method of sieving, characterized by: The screening method is based on the flexible material distributing device as claimed in claim 8. The device further includes: A liquid ripple sensor (60) installed in the screening flow channel (11) for detecting the fluctuation degree of the surface of the liquid medium. A controller (70) electrically connected to the first liquid pump (211), the second liquid pump (221), the distance sensor (1112) and the liquid ripple sensor (60). The screening method includes the following steps: S1. Place the material (80) on the stationary liquid medium, and measure the distance Z1 between the top surface of the material (80) in the unqualified posture and the upper surface of the liquid medium, and the distance Z2 between the top surface of the material (80) in the qualified posture and the upper surface of the liquid medium. S2. Adjust the interval X1 between the lower surface of the anti-overlapping plate (111) and the upper surface of the liquid medium, and select the screening plate (112) with Z2 > X2 > Z1 and install it in the screening flow channel (11). X2 is the interval between the screening plate (112) and the upper surface of the liquid medium. S3. Start the first liquid pump (211) and the second liquid pump (221), and pour the material (80) into the screening flow channel (11) through the hopper (40). The anti-overlapping plate (111) divides the stacked materials (80) into single materials (80) floating on the liquid medium. S4. The material (80) in the qualified posture flows into the discharge flow channel (13) by relying on the surface of the screening plate (112) and the flow of the liquid medium. The material (80) in the unqualified posture enters the correction flow channel (12) through the screening plate (112) and enters step S5. S5. Make the upper surface of the liquid medium in the correction flow channel (12) form a turbulent flow through the injection liquid pump (32), and the air jet pump (31) sprays gas towards the material (80) to make the material (80) turn over. S6. The material (80) enters the screening flow channel (11) from the buffer flow channel (14) and continues to be screened. In step S4, an error detection method is further included. The error detection method includes: S41. When the distance sensor (1112) detects that Z1 > X2 or Z2 < X2, send a first signal to the controller (70). The controller (70) stops or starts the first liquid pump (211) and the second liquid pump (221) according to the first signal. Or when the liquid ripple sensor (60) detects that the fluctuation degree of the surface of the liquid medium exceeds the threshold value, send a second signal to the controller (70). The controller (70) reduces the power of the first liquid pump (211) according to the second signal until the fluctuation degree of the surface of the liquid medium is lower than the threshold value.

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