Flexible material distributing equipment and screening method

Abstract

According to the flexible material distributing equipment and the screening method, an existing vibration driving mode is replaced with a mode that the liquid medium drives the materials to move forwards, noise of the screening equipment is effectively reduced, damage to the materials can be reduced to the maximum extent through the flowing liquid medium, the damage rate of the materials is reduced, the screening quality is guaranteed, and the screening efficiency is improved. In addition, the surface height of the liquid medium, the height of the anti-overlapping plate and the type of the screening plate can be selected according to parameters such as the density and the volume of the materials, so that the same equipment can be used for screening various different materials, and if the parameters such as the density and the volume of different types of materials are similar, the screening efficiency is improved. And two different materials can be screened by one device.

Description

Technical Field

[0001] The present application relates to the technical field of material screening equipment, and in particular to a flexible material separation equipment and a screening method. Background Art

[0002] The material distribution equipment is an indispensable part of industrial automation production. It realizes the classification, distribution and transportation of materials through different working principles and structural designs. Commonly used ones include vibrating distributors, cyclone distributors, electromagnetic distributors, fixed screens, drum screens, vibrating screens, belt conveyors, etc. In actual use, the above equipment has four main disadvantages: 1. High noise; 2. Poor material versatility; 3. A certain degree of damage to the outer surface of the raw material; 4. Poor adjustability of the feeding point; 5. The volume of some distributors is uncontrollable and occupies a large space. Summary of the invention

[0003] The object of the present invention is to solve the above-mentioned problems and provide a flexible material distribution equipment and a screening method.

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

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

[0006] A screening pool, wherein the screening pool has a screening flow channel, a correction flow channel and a discharge flow channel, the head end and the tail end of the correction flow channel are both connected to the screening flow channel, the discharge flow channel is connected to the screening flow channel, the screening pool has a liquid medium, and materials float on the upper surface of the liquid medium, wherein the posture of the materials on the liquid medium includes a qualified posture and a disqualified posture;

[0007] A flow-assisting mechanism, used to make the liquid medium circulate between the screening flow channel and the correction flow channel, and the flow-assisting mechanism is further used to make the liquid medium flow unidirectionally from the screening flow channel to the discharge flow channel;

[0008] A turning mechanism, installed in the correction flow channel, for turning over the material in the correction flow channel;

[0009] A screening plate is installed in the screening flow 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 a qualified posture to the discharge flow channel, and to guide the material in a disqualified posture to the correction flow channel;

[0010] The screening flow channel is also equipped with:

[0011] An anti-stack plate is installed in the screening flow channel so as to be movable up and down, and a gap X2 is formed between the lower surface of the anti-stack plate and the upper surface of the liquid medium;

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

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

[0014] In a second aspect, the present application further provides a screening method, wherein the screening method is based on the flexible material dividing device as described above;

[0015] The device further comprises:

[0016] A liquid ripple sensor, installed in the screening flow channel, for detecting the degree of fluctuation on the surface of the liquid medium;

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

[0018] The screening method comprises the following steps:

[0019] S1, placing the material on the static liquid medium, and measuring the distance Z1 between the top surface of the material and the upper surface of the liquid medium in the unqualified 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, adjusting the interval X2 between the lower surface of the anti-overlapping plate and the upper surface of the liquid medium, selecting the sieve plate with X1>Z2 to be installed in the sieve channel, wherein X1 is the interval between the sieve plate and the upper surface of the liquid medium;

[0021] S3, starting the first liquid pump and the second liquid pump, pouring the material into the screening channel through the hopper, and the anti-overlapping plate separates the mutually stacked materials into a single material floating on the liquid medium;

[0022] S4, the material in a qualified state relies on the surface of the screen plate and the flow of the liquid medium to flow into the discharge channel, and the material in a disqualified state passes through the screen plate into the correction channel, and then proceeds to step S5;

[0023] S5, using a liquid jet pump to form turbulence on the upper surface of the liquid medium in the correction flow channel, and using a paint spray pump to spray gas toward the material, so that the material is turned over;

[0024] S6. The material enters the sieve channel from the buffer channel, and the steps of S1 are 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 according to the second signal 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 a 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 can also select the surface height of the liquid medium, the height of the anti-overlapping plate, and the type of the sieve plate according to parameters such as the density and volume of the material. It is possible to use the same equipment to screen a variety of different materials. If the parameters such as the density and volume of different types of materials are similar, it is also possible to use one equipment to screen two different materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings illustrate exemplary embodiments of the present application of the 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 equipment of the embodiments of the present invention;

[0031] Figure 2 Shows a schematic diagram of the liquid flow direction of the screening pool of the embodiments 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 of the embodiments of the present invention;

[0033] Figure 4 Shows a schematic structural diagram of the equipment with the hopper hidden in the embodiments of the present invention;

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

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

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

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

[0038] Fig. 9 A schematic diagram showing the operation of the injection liquid pump according to the embodiment of the present invention in the first embodiment is shown;

[0039] Fig.10 A schematic diagram showing the operation of the injection liquid pump according to the embodiment of the present invention under the second embodiment is shown;

[0040] Fig.11 A first operation schematic diagram of the injection liquid pump according to the embodiment of the present invention in the third embodiment is shown;

[0041] Fig.12 A second operation schematic diagram of the injection liquid pump according to the embodiment of the present invention in the third embodiment is shown;

[0042] Fig.13 A schematic diagram of disassembling a sieve plate according to an embodiment of the present invention is shown;

[0043] Figure numerals: 10, screening pool; 11, screening channel; 111, anti-overlapping plate; 1112, distance sensor; 1113, vibrator; 112, screening plate; 12, correction channel; 13, discharge channel; 14, buffer channel; 141, wave-blocking plate; 20, flow-aiding mechanism; 21, reflux liquid pipe; 211, first liquid pump; 22, discharge liquid pipe; 221, second liquid pump; 30, flipping mechanism; 31, jet pump; 311, camera; 32, jet liquid pump; 40, hopper; 41, splash plate; 50, guide plate; 60, liquid ripple sensor; 70, controller; 80, material. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided for a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0045] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be understood that the term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0047] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

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

[0049] Reference Figure 1 A flexible material distribution device, specifically, a material distribution device that uses a flexible flowing medium, such as a liquid medium, to move a material 80, wherein the posture of the material 80 on the liquid medium has a qualified posture and a disqualified posture, generally speaking, a front side and a back side, preferably, the height of the front side posture of the material 80 on the liquid medium is lower than the height of the back side posture, and the material 80 in the present application is taken as an example of a double gear composed of two coaxial large gears and a small gear stacked together in the height direction;

[0050] The above equipment includes:

[0051] The screening pool 10 has a screening channel 11, a correction channel 12, a discharge channel 13 and a buffer channel, such as Figure 2 As shown, the head end of the correction channel 12 is connected to the screening channel 11, and the tail 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 make the liquid medium circulate among 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 flows from the correction channel 12 into the buffer channel 14, and then flows from the buffer channel 14 into the screening channel 11. In addition, a wave-blocking plate 141 is installed between the buffer channel 14 and the screening channel 11. The wave-blocking plate 141 can calm the waves on the surface of the liquid medium entering the screening channel 11 from the buffer channel 14, thereby reducing the screening error. In addition, the flow-aiding mechanism 20 is further used to make the liquid medium flow unidirectionally in the screening channel 11 toward the discharge channel 13;

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

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

[0055] Screening plate 112, such as Figure 4 and Figure 5 As shown, the middle of the screen plate 112 has a hollow portion, and there is a gap X1 between the hollow portion of the screen plate 112 and the upper surface of the liquid medium. The screen plate 112 is used to guide the material 80 in a qualified state to the discharge flow channel 13, and to guide the material 80 in a disqualified state to the correction flow channel 12, as shown in FIG. Figure 5 As shown, the material 80 in a disqualified state will directly pass through the hollow part, while the material 80 in a qualified state is blocked by the upper part of the screening plate 112, and thus cannot enter the correction flow channel 12, and will flow into the discharge channel for discharge along the direction of the screening plate 112 and the flow of the liquid medium;

[0056] The anti-stack plate 111 is installed in the screening flow channel 11 so as to be movable up and down. The function of the anti-stack plate 111 is to prevent the material 80 from stacking up and down. Figure 7As shown, when the stacked material 80 passes through the anti-overlap plate 111, the upper material 80 will be blocked and thus fall. And a vibrator 1113 is installed on the anti-overlap plate 111. The vibrator 1113 is used to vibrate the anti-overlap plate 111, which can strengthen the exclusion of the stacked material 80. There is a gap X2 between the lower surface of the anti-overlap 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-overlap 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-overlap plate 111. If X1 > 2*Z2, the anti-overlap plate 111 will lose its anti-overlap function. Z2 > X2 > Z1. If X2 > Z2, the material 80 in the qualified posture will also flow into the correction channel 12. If X2 < Z1, neither the material 80 in the qualified posture nor the material 80 in the unqualified posture 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 direction of 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 paint spraying pump is used to spray 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 below the paint spraying pump. If so, it controls the paint spraying pump to spray gas towards the material 80.

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

[0063] Embodiment 1: The liquid medium surface of the injection end of the injection liquid pump 32 is flush, and the injection liquid pump 32 sprays the liquid medium on the surface of the material 80. The material 80 will turn over under the strong impact. At the same time, the camera 311 detects that the material 80 passes by and controls the injection pump 31 to spray downward, further assisting the material 80 to turn over. Fig. 9 Shown in the upper, middle and lower parts.

[0064] Embodiment 2: The jet liquid pump 32 is installed below the surface of the liquid medium. The water flow sprayed by the jet liquid 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 up. At the same time, the camera 311 detects that the material 80 passes by, and controls the jet pump 31 to spray downward, further assisting the flipping of the material 80. There is a distance Y between the injection end of the jet liquid pump 32 and the surface of the liquid medium, wherein the distance Y is less than 2 cm. If the distance Y is greater than 2 cm, it is easy to cause the jet liquid pump 32 to increase the water level by spraying high-pressure liquid. The effect is not obvious, which is not conducive to the flipping of the material 80 in the disqualified posture.

[0065] Embodiment 3: The jetting liquid pump 32 is installed below the surface of the liquid medium, and there is a distance Y between the jetting end of the jetting liquid pump 32 and the surface of the liquid medium, wherein the distance Y>2cm, and at the same time, the jetting end of the jetting liquid pump 32 is arranged upward, and there is an angle A between the jetting end of the jetting liquid pump 32 and the horizontal plane, wherein the angle A=30°~45°, such as Fig.11 As shown, compared with the second embodiment, the water flow sprayed by the jet pump 32 can more significantly form a raised water level on one side of the two sides of the material 80, which can make the material 80 in the disqualified posture easier to turn over, and then cooperate with the jet pump 31 to spray downward to further assist the material 80 to turn over. It should be noted that the jet pump 32 can spray intermittently or be in a spraying state all the time, such as Fig.12 As shown, no matter the spraying angle is on the left or right side of the material 80, one side of the material 80 can be significantly turned up.

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

[0067]

[0068] Table 1

[0069] Next, the device further includes

[0070] A hopper 40, used to put material 80 into the screening channel 11;

[0071] A splash plate 41 is installed below the discharge port of the hopper 40, and the splash plate 41 is tilted toward the discharge channel 13;

[0072] A guide plate 50 is installed in the screening channel 11 and is used to guide the material 80 to flow toward 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, and the front end and the rear end of the partition plate are spaced from the inner wall of the screening pool 10; the side of the partition plate close to the correction channel 12 also has a curved surface.

[0074] An embodiment of the present invention further provides a screening method, which is based on the above-mentioned flexible material dividing device;

[0075] The device further comprises:

[0076] The liquid ripple sensor 60 is installed in the screening flow channel 11 and is used to detect the fluctuation degree of the surface of 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 comprises the following steps:

[0079] S1, placing the material 80 on a stationary liquid medium, and measuring the distance Z1 between the top surface of the material 80 and the upper surface of the liquid medium in the unqualified posture, and the distance Z2 between the top surface of the material 80 and the upper surface of the liquid medium in the qualified posture;

[0080] S2, adjust the interval X2 between the lower surface of the anti-overlapping plate 111 and the upper surface of the liquid medium, select the screening plate 112 with X1>Z2 to be installed in the screening channel, X1 is the interval 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, pour the material 80 into the screening channel through the hopper 40, and the anti-stack plate 111 separates the stacked materials 80 into a single material 80 floating on the liquid medium;

[0082] S4, the material 80 in a qualified state leans against the surface of the screening plate 112 and the flow of the liquid medium into the discharge flow channel 13, and the material 80 in a disqualified state passes through the screening plate 112 into the correction flow channel 12, and then proceeds to step S5;

[0083] S5. The liquid medium on the upper surface in the calibration channel 12 is made to form turbulence by the injection liquid pump 32, and the paint spraying pump sprays gas onto the material 80, causing the material 80 to flip;

[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 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, and therefore 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 on the basis of the above disclosure, and these changes or variations are still within the scope of the present application.

Claims

1. A flexible material distribution equipment, characterized in that: The device comprises: A screening pool (10), wherein the screening pool (10) has a screening flow channel (11), a correction flow channel (12) and a discharge flow channel (13), wherein the head end and the tail end of the correction flow channel (12) are both connected to the screening flow channel (11), and the discharge flow channel (13) is connected to the screening flow channel (11), wherein the screening pool (10) has a liquid medium, and a material (80) floats on the upper surface of the liquid medium, wherein the posture of the material (80) on the liquid medium includes a qualified posture and a disqualified posture; A flow-assisting mechanism (20) is used to allow the liquid medium to circulate between the screening flow channel (11) and the correction flow channel (12), and the flow-assisting mechanism (20) is further used to allow the liquid medium to flow unidirectionally from the screening flow channel (11) to the discharge flow channel (13); a turning mechanism (30), installed in the correction flow channel (12), and used 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 a gap X1 is provided between the screening plate (112) and the upper surface of the liquid medium. The screening plate (112) is used to guide the material (80) in a qualified state to the discharge flow channel (13), and to guide the material (80) in a disqualified state to the correction flow channel (12); The screening flow channel (11) is also equipped with: An anti-stack plate (111) is installed in the screening flow channel (11) so as to be movable up and down, and a gap X2 is formed between the lower surface of the anti-stack plate (111) and the upper surface of the liquid medium; a distance sensor (1112) for detecting a distance Z1 between the top surface of the material (80) and the upper surface of the liquid medium in a disqualified posture, and for detecting a distance Z2 between the top surface of the material (80) and the upper surface of the liquid medium in a qualified posture, and Z2>Z1; Among them, 2*Z2>X1>Z2; Z2>X2>Z1.

2. The flexible material distribution equipment according to claim 1, characterized in that: The screening pool (10) further comprises a buffer flow channel (14) located between the screening flow channel (11) and the correction flow channel (12); a wave-blocking plate (141) is installed between the buffer flow channel (14) and the screening flow channel (11); The flow-aiding mechanism (20) comprises: a reflux liquid pipe (21), wherein a first end of the reflux liquid pipe (21) is connected to a portion between the screening flow channel (11) and the correction flow channel (12), and a second end of the reflux liquid pipe (21) is connected to the buffer channel; a first liquid pump (211), installed on the reflux liquid pipe (21), and used 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) installed at the bottom of the discharge flow channel (13); a first end of the discharge liquid pipe (22) is connected to the bottom of the discharge flow channel (13); a second end of the discharge liquid pipe (22) is connected to a portion between the screening flow channel (11) and the correction flow channel (12); a mesh 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.

3. The flexible material distribution equipment according to claim 2, characterized in that: The turning mechanism (30) comprises: A liquid injection pump (32) is installed at the front end of the correction flow channel (12), and the injection end of the liquid injection pump (32) is directed toward the rear end of the correction flow channel (12). The liquid injection pump (32) is used to absorb the liquid medium and inject the liquid medium toward the material (80), so that turbulence is formed on the upper surface of the liquid medium in the correction flow channel (12), thereby causing the material (80) to flip.

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

5. The flexible material distribution equipment according to claim 1, characterized in that: The liquid injection pump (32) is installed below the surface of the liquid medium, and there is a distance Y between the injection end of the liquid injection pump (32) and the surface of the liquid medium, wherein the distance Y is less than 2 cm.

6. The flexible material distribution equipment according to claim 5, characterized in that: The injection end of the injection liquid pump (32) is arranged upward, and an angle A is formed between the injection end of the injection liquid pump (32) and a horizontal plane, wherein the angle A=30° to 45°.

7. The flexible material distribution equipment according to claim 4 or 5, characterized in that: The turning mechanism (30) further comprises: A jet pump (31) is installed at the upper end of the correction flow channel (12), and the jet end of the jet pump (31) is arranged downward, and the paint spray pump is used to spray gas toward the material (80) so that the material (80) turns over; A camera (311) is installed on the jet pump (31), and the camera (311) is used to detect whether the material (80) passes under the paint spray pump, and if so, control the paint spray pump to spray the material (80).

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

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

10. A screening method, characterized in that: The screening method is based on the flexible material distributing device as claimed in claim 9; The device further includes: A liquid ripple sensor (60) installed in the sieve diversion channel (11) for detecting the degree of fluctuation 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 X2 between the lower surface of the anti-overlapping plate (111) and the upper surface of the liquid medium, and select the sieve plate (112) with X1>Z2 to be installed in the screening channel, where X1 is the interval between the sieve 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 channel 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 channel (13) by relying on the surface of the sieve plate (112) and the flow of the liquid medium. The material (80) in the unqualified posture enters the correction channel (12) through the sieve plate (112) and enters step S5; S5. Make the upper surface of the liquid medium in the correction channel (12) form a turbulent flow through the injection liquid pump (32), and the paint spraying pump sprays gas towards the material (80) so that the material (80) flips; S6. The material (80) enters the sieve diversion channel (11) from the buffer channel (14) and repeats the steps of S1; 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 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 degree of fluctuation of the surface of the liquid medium exceeds the threshold, 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 degree of fluctuation of the surface of the liquid medium is lower than the threshold.

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