Material suction assembly and method and material conveying equipment

Abstract

The invention discloses a material suction assembly and method and material conveying device.The material suction assembly comprises a suction pipe and a water spraying mechanism, the suction pipe is used for being connected with a negative pressure mechanism, a material suction end is formed at the bottom end of the suction pipe, the water spraying mechanism is arranged at the material suction end and used for spraying flushing water, and the flushing water is used for impacting and crushing materials passing through the material suction end; at least part of the flushing water can be sucked into the suction pipe, a water film is formed on the inner circumferential wall of the suction pipe under the action of airflow in the suction pipe, the water film can reduce the friction coefficient between the materials and the inner wall of the suction pipe and prevent the materials from making direct contact with the inner wall of the suction pipe, and therefore direct material adhesion caused by Van der Waals' force, electrostatic force and the like is avoided. According to the material suction assembly and method and the material conveying equipment, when the suction pipe sucks materials, the materials can be effectively prevented from being attached to the inner wall of the suction pipe, and long-term smoothness of the suction pipe is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material conveying, in particular to a material suction assembly, a material suction method and a material conveying device. BACKGROUND

[0002] Bulk materials such as coal are mainly transported by trains or heavy trucks. After the transportation is completed, the inner surface of the carriage will be adhered with residual materials, which need to be cleaned by a cleaning device. Then the residual materials cleaned are sucked from the stockyard or unloading point by a negative pressure conveying device and conveyed to a storage bin. The negative pressure conveying device includes a negative pressure mechanism and a suction pipe. The negative pressure mechanism sucks the residual materials through the suction pipe.

[0003] Due to the strong adhesion of some materials such as lignite or raw coal, the materials are easily adhered to the inner wall of the suction pipe, especially the materials with large individual inertia and large adhesion area, which are more easily adhered and blocked in the suction port, resulting in a decrease in the flow area of the suction pipe, a sharp increase in the conveying resistance, a significant decrease in the conveying efficiency, and finally a complete blockage of the suction pipe. In the prior art, external mechanical vibration or air hammer knocking is generally used for dredging, but these methods cannot prevent the adhesion of materials, and the dredging effect is unstable, which may also cause damage to the suction pipe. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a material suction assembly, which can effectively prevent the adhesion of materials to the inner wall of the suction pipe when the suction pipe sucks the materials, thereby ensuring the long-term smoothness of the suction pipe.

[0005] The present application also provides a material suction method.

[0006] The present application also provides a material conveying device.

[0007] According to the material suction assembly of the first aspect of the present application, the suction pipe is used to connect the negative pressure mechanism, the bottom end of the suction pipe forms a material suction end, the water spraying mechanism is arranged at the material suction end to spray flushing water, the flushing water is used to impact and break the materials passing through the material suction end, and at least part of the flushing water can be sucked into the suction pipe and form a water film on the inner circumferential wall of the suction pipe under the action of the airflow in the suction pipe.

[0008] According to the material suction assembly of the present application, at least the following beneficial effects are achieved: Before adsorbing the coal and other materials, the negative pressure mechanism and the water spraying mechanism are started. The negative pressure mechanism forms a negative pressure in the suction pipe, and the water spraying mechanism sprays flushing water. At least part of the flushing water is sucked into the suction pipe and forms a water film on the inner circumferential wall of the suction pipe under the action of the airflow in the suction pipe. Then, the material feeding end of the suction pipe is moved above the material, and the material feeding work can be carried out. In the present application, the flushing water sprayed by the water spraying mechanism can impact and break the material passing through the material feeding end into small particles. The material is more easily carried by the airflow in the suction pipe, and the material is less likely to directly impact and block the material suction port of the suction pipe due to its large size. In addition, the size of the material is reduced, the inertia and adhesion area are reduced, and the material is less likely to adhere to the inner wall of the suction pipe. Finally, at least part of the flushing water, such as atomized water, sprayed by the water spraying mechanism can be sucked into the suction pipe and form a water film on the inner circumferential wall of the suction pipe under the action of the airflow in the suction pipe. This layer of water film can reduce the friction coefficient between the material and the inner wall of the suction pipe, and prevent the material from directly contacting the inner wall of the suction pipe, thereby avoiding the direct adhesion of the material caused by van der Waals force, electrostatic force and the like. A small amount of adhered material is also easily washed away by the subsequent water flow and airflow, thereby ensuring the long-term smoothness of the suction pipe.

[0009] According to some embodiments of the present application, the suction pipe comprises a suction pipe body and a flow guide pipe, the flow guide pipe is connected to the bottom end of the suction pipe body, the flow guide pipe comprises a flared section, the flared section is coaxially arranged with the bottom end of the suction pipe body, the inner diameter size of the flared section gradually increases from top to bottom, and the bottom end of the flared section forms the material suction end.

[0010] According to some embodiments of the present application, the flow guide pipe further comprises a straight pipe section, the straight pipe section is coaxially inserted into the bottom end of the suction pipe body, the outer circumferential wall of the straight pipe section is fitted to the inner circumferential wall of the suction pipe body, and the flared section is connected to the bottom end of the straight pipe section.

[0011] According to some embodiments of the present application, the included angle between the outer contour of the longitudinal section of the flared section and the axis of the flared section is α, and satisfies: 30°≤α≤60°.

[0012] According to some embodiments of the present application, the inner diameter size of the bottom end of the flared section is D, and the inner diameter size of the bottom end of the suction pipe body is d, and satisfies: 1.15d≤D≤1.25d.

[0013] According to some embodiments of the present application, the water spraying mechanism comprises a ring-shaped water pipe and a plurality of nozzles, the ring-shaped water pipe is arranged outside the material suction end and surrounds the material suction end, and the plurality of nozzles are arranged on the ring-shaped water pipe and arranged along the circumferential direction of the ring-shaped water pipe.

[0014] According to some embodiments of the present application, the spraying direction of the nozzle extends obliquely in the direction of approaching the axis of the material suction end and downward.

[0015] According to some embodiments of the present application, the material suction assembly further comprises a material bin, one side of the material bin is outwardly convex to form a material inlet cavity, a bottom wall of the material inlet cavity extends upwardly in a direction away from the material bin, the bottom wall of the material inlet cavity is provided with a material inlet, the material inlet is connected to a top end of the suction pipe, a top end of the material bin is provided with a negative pressure port, and the negative pressure port is used to connect a negative pressure mechanism.

[0016] According to the material suction method of the second aspect of the present application, based on the material suction assembly of the first aspect of the present application, comprising: starting the negative pressure mechanism and the water spraying mechanism, the negative pressure mechanism forms a negative pressure in the suction pipe, and the water spraying mechanism sprays flushing water, at least part of the flushing water is sucked into the suction pipe and forms a water film on an inner circumferential wall of the suction pipe; moving the material suction end of the suction pipe above the material to perform material suction, and in the material suction process, the flushing water impacts and breaks the material passing through the material suction end.

[0017] According to the material conveying device of the third aspect of the present application, comprising the material suction assembly of the first aspect of the present application.

[0018] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and embodiments, wherein: Figure 1 is a structural schematic diagram of the material suction assembly; Figure 2 is a working schematic diagram of the material suction assembly; Figure 3 is a structural schematic diagram of the material suction assembly; Figure 1 is a partial enlarged view of the material suction assembly; Figure 4 is a structural schematic diagram of the flow guide pipe; Figure 5 is a simulation schematic diagram of air flow velocity distribution in the suction pipe when the flow guide pipe is not arranged; Figure 6 is a simulation schematic diagram of air flow velocity distribution in the suction pipe of the present application.

[0020] LIST OF DRAWINGS suction pipe 100; material suction end 101; suction pipe body 102; flow guide pipe 103; flared section 104; straight pipe section 105; clamp 106; water spraying mechanism 200; annular water pipe 201; nozzle 202; material bin 300; material inlet cavity 301; material inlet 302; negative pressure port 303. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0025] The following is for reference. Figures 1 to 6 This application describes a suction assembly and a material conveying device according to embodiments thereof.

[0026] refer to Figures 1 to 4 As shown, the suction assembly according to the first aspect of this application includes a suction tube 100 and a water spraying mechanism 200.

[0027] The suction tube 100 is used to connect to the negative pressure mechanism, and the bottom end of the suction tube 100 forms a suction end 101. For example, the top end of the suction tube 100 can be used to connect to the negative pressure mechanism, which can be a negative pressure fan or a vacuum pump, etc. The suction end 101 forms a suction port for material to be sucked in.

[0028] A water spray mechanism 200 is located at the suction end 101 to spray flushing water. The flushing water may include high-pressure fine water jets and a portion of atomized water. The flushing water is used to impact and crush the material passing through the suction end 101. Specifically, when the water jet impacts the surface of materials such as coal blocks, the water flow pressure exceeds the compressive strength of the materials, causing surface cracks and breakage. In addition, under high pressure, the water jet penetrates into the tiny cracks and pores of the materials such as coal blocks, generating tensile stress within the pores, which cracks the materials from the inside, greatly improving crushing efficiency. Furthermore, the water jet also generates shear force on the materials such as coal blocks, helping to tear apart large structures, thereby transforming large pieces of material that easily adhere to the inner wall of the suction pipe 100 and clog the suction port into small particles that are easy to convey and less likely to adhere to the inner wall of the suction pipe 100 and clog the suction port. This process handles large pieces of material, fundamentally preventing them from blocking the inlet due to their excessive size, or from colliding with the inner wall of the straw 100 due to excessive inertia and adhesion area.

[0029] In addition, at least some of the flushing water can be drawn into the straw 100. For example, some atomized water and small water droplets can be drawn into the straw 100 under the negative pressure. Under the action of airflow and centrifugal force, this water spreads on the entire inner wall of the straw 100, forming a thin and uniform dynamic water film.

[0030] Before adsorbing materials such as coal, the negative pressure mechanism and the water spraying mechanism 200 are activated. The negative pressure mechanism creates a negative pressure inside the suction pipe 100, and the water spraying mechanism 200 sprays flushing water. At least part of the flushing water is drawn into the suction pipe 100 and forms a water film on the inner circumferential wall of the suction pipe 100 under the action of the airflow inside the suction pipe 100. Then, the feed end of the suction pipe 100 is moved above the material to start the material suction and conveying operation.

[0031] In this application, the flushing water sprayed by the water spraying mechanism 200 can impact and break the material passing through the feed end into small particles. This not only makes it easier for the material to be carried and transported by the airflow within the suction pipe 100, but also prevents the material from directly impacting and clogging the suction port of the suction pipe 100 due to its excessive size. Furthermore, the reduced material size decreases inertia and adhesion area, making it less likely to adhere to the inner wall of the suction pipe 100. Finally, at least a portion of the flushing water sprayed by the water spraying mechanism 200, such as atomized water, can be drawn into the suction pipe 100. Under the influence of airflow in the straw 100, a water film forms on the inner wall of the straw 100. This water film reduces the coefficient of friction between the material and the inner wall of the straw 100, and prevents direct contact between the material and the inner wall of the straw 100. This avoids direct adhesion of material caused by van der Waals forces, electrostatic forces, etc. Any adhering material is easily washed away by subsequent water and airflow, ensuring the long-term unobstructed flow of the straw 100. This reduces the energy consumption of the negative pressure mechanism and significantly improves the overall suction efficiency and conveying capacity. The entire conveying equipment no longer needs to be shut down due to frequent blockages, greatly improving the continuity of equipment operation and production rate, creating direct economic benefits for enterprises, and is suitable for widespread application.

[0032] In a traditional straw 100, when external airflow is drawn into the straw 100, the airflow suddenly contracts from a wide space into a narrow tube, the airflow direction bends sharply, and due to the friction and viscosity effect of the tube wall, its speed cannot reach a fully developed turbulent state at the moment of entry. As a result, most of the airflow rushes towards the central axis of the straw 100, forming a violent vortex, thus creating an unstable velocity distribution profile. Specifically, the airflow speed in the central axis region of the straw 100 is extremely high, while the airflow speed drops sharply closer to the tube wall, forming a wide low-speed zone.

[0033] When the airflow carrying material enters the suction tube 100, particles in the high-speed zone along the central axis of the suction tube 100 gain sufficient kinetic energy and are quickly carried away. However, materials entering the low-speed zone near the wall experience significantly insufficient airflow drag, causing their speed to drop sharply. The material collides with the tube wall and, under the combined effects of van der Waals forces, electrostatic forces, and the material's own viscosity, overcomes its elasticity and adheres to the tube wall. Once an initial adhesion layer is formed, its surface becomes rougher, exacerbating the continued adhesion of subsequent particles, leading to a continuous thickening of the adhesion layer until blockage occurs.

[0034] To solve the above problems, refer to Figure 3 and Figure 4As shown, in some embodiments of this application, the straw 100 includes a straw body 102 and a guide tube 103. The guide tube 103 is connected to the bottom end of the straw body 102. The guide tube 103 includes a flared section 104. The flared section 104 is coaxially arranged with the bottom end of the straw body 102. The inner diameter of the flared section 104 gradually increases from top to bottom. The bottom end of the flared section 104 forms a suction end 101.

[0035] After external air enters the flared section 104 of the guide pipe 103, the airflow undergoes a smooth, gradually converging acceleration process guided by the pipe wall of the flared section 104. Furthermore, the flared section 104 smoothly guides the airflow to change direction, gradually converging towards the suction pipe body 102. This design effectively prevents the generation of vortices, resulting in a more uniform airflow velocity distribution at the end of the suction pipe body 102 near the suction port. This significantly reduces the low-velocity zone near the wall, thereby effectively reducing the adhesion of material to the pipe wall due to insufficient airflow velocity.

[0036] Figure 5 This is a simulation diagram of the airflow velocity distribution within a traditional suction pipe 100 without a guide tube 103. Figure 6 This is a simulation diagram of the airflow velocity distribution within the suction tube 100 equipped with a guide tube 103 according to this application. Different colors represent different airflow velocities, with red, yellow, green, and blue representing velocities from highest to lowest. Simulation analysis shows that in a traditional suction tube 100 without a guide tube 103, the airflow velocity is extremely high at the central axis of the tube 100, but decreases sharply towards the tube wall, forming a wide low-velocity zone. In contrast, the suction tube 100 of this application with a guide tube 103 exhibits a more uniform airflow velocity distribution with consistently high velocities and a very small low-velocity zone, demonstrating the effective airflow distribution after the guide tube 103 is installed.

[0037] refer to Figure 3 and Figure 4 As shown, in some embodiments of this application, the guide tube 103 further includes a straight tube section 105, which is coaxially inserted into the bottom end of the straw body 102. The outer peripheral wall of the straight tube section 105 is fitted against the inner peripheral wall of the straw body 102, and the flared section 104 is connected to the bottom end of the straight tube section 105. For example, the inner diameter of the straight tube section 105 remains constant from top to bottom. Since the straight tube section 105 is coaxially inserted into the bottom end of the straw body 102, a clamp 106 can be fitted onto the outer peripheral wall of the straw body 102 for locking.

[0038] In this embodiment, the guide tube 103 is coaxially inserted into the bottom end of the straw body 102 via a straight tube section 105, facilitating regular cleaning or replacement of the guide tube 103. Furthermore, in this application, the straight tube section 105 is inserted into the straw body 102. Compared to the straw body 102 being inserted into the straight tube section 105, this avoids the bottom surface of the straw body 102 obstructing airflow, resulting in smoother airflow, faster airflow speed, and thus better material delivery. It also further reduces the adhesion of material to the inner wall of the straw 100.

[0039] In some embodiments of this application, the angle between the outer contour of the longitudinal section of the flared section 104 and the centerline of the flared section 104 is α, satisfying: 30°≤α≤60°. For example, the angle α between the outer contour of the longitudinal section of the flared section 104 and the centerline of the flared section 104 can be 30°, 40°, 50°, 60° or other suitable degrees.

[0040] In this embodiment, the angle α between the outer contour of the longitudinal section of the flared section 104 and the centerline of the flared section 104 satisfies: 30°≤α≤60°. This avoids the angle between the outer contour of the longitudinal section of the flared section 104 and the centerline of the flared section 104 being too small, which would affect the guiding effect. This results in a better guiding effect of the flared section 104, allowing the airflow to undergo a smoother, gradually converging acceleration process. This enables the airflow to change direction more smoothly and gradually converge towards the straw body 102. Furthermore, it avoids the angle between the outer contour of the longitudinal section of the flared section 104 and the centerline of the flared section 104 being too large, which would cause the pipe wall of the flared section 104 to obstruct the airflow.

[0041] In some embodiments of this application, the inner diameter of the bottom end of the flared section 104 is D, and the inner diameter of the bottom end of the straw body 102 is d, satisfying: 1.15d ≤ D ≤ 1.25d. For example, the inner diameter of the bottom end of the flared section 104 can be 1.15 times, 1.20 times, 1.25 times, or other suitable multiples of the inner diameter of the bottom end of the straw body 102.

[0042] In this embodiment, the inner diameter of the bottom end of the flared section 104 is D, and the inner diameter of the bottom end of the straw body 102 is d, satisfying: 1.15d≤D≤1.25d. This avoids the bottom end of the flared section 104 being too large or too small relative to the bottom end of the straw body 102, resulting in better flow guidance of the flared section 104.

[0043] refer to Figure 3As shown, in some embodiments of this application, the water spraying mechanism 200 includes an annular water pipe 201 and a plurality of nozzles 202. The annular water pipe 201 is located outside the suction end 101 and surrounds the suction end 101. The plurality of nozzles 202 are located on the annular water pipe 201 and arranged circumferentially along the annular water pipe 201. For example, the plurality of nozzles 202 can be evenly arranged circumferentially along the annular water pipe 201, and the annular water pipe 201 can be connected to a water supply device.

[0044] In this embodiment, flushing water is delivered into the annular water pipe 201, and the flushing water is sprayed out through multiple nozzles 202, thereby forming an annular water curtain. This results in a better impact and crushing effect on the material, and also makes it easier for water films to form at various positions on the inner circumferential wall of the suction pipe 100, thus improving its practicality.

[0045] refer to Figure 3 As shown, in some embodiments of this application, the spray direction of the nozzle 202 extends obliquely downward along the axis near the suction end 101. Thus, the flushing water sprayed from multiple nozzles 202 can form an inwardly and downwardly inclined conical, annular water curtain, thereby extending the impact crushing time on the material, widening the impact crushing range, and improving the impact crushing effect.

[0046] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the suction assembly further includes a hopper 300. A feeding chamber 301 protrudes outward from one side of the hopper 300. The bottom wall of the feeding chamber 301 extends upward at an angle away from the hopper 300. An inlet 302 is provided on the bottom wall of the feeding chamber 301, connecting to the top of the suction pipe 100. A negative pressure port 303 is provided at the top of the hopper 300, used to connect to a negative pressure mechanism. Under the continuous action of negative pressure, the three-phase mixture of material, water, and air is transported to the hopper 300 through the suction pipe 100. Inside the hopper 300, due to the sudden increase in volume, the airflow velocity drops sharply, and the material settles to the bottom of the hopper 300 for collection or subsequent processing. Air and some water mist can be sucked out through the negative pressure port 303 at the top. In addition, the bottom wall of the feeding chamber 301 extends upward in a direction away from the hopper 300, and the bottom wall of the feeding chamber 301 is provided with a feeding port 302. In this way, after the material is splashed into the hopper 300 from the feeding port 302, it is easier to be thrown into the hopper 300 in a parabolic manner, thereby making the material distribution more uniform.

[0047] According to the material suction method of the second aspect of this application, the material suction component based on the first aspect of this application includes: The negative pressure mechanism and the water spraying mechanism 200 are activated. The negative pressure mechanism creates a negative pressure inside the straw 100, and the water spraying mechanism 200 sprays flushing water. At least part of the flushing water is drawn into the straw 100 and forms a water film on the inner circumferential wall of the straw 100. The feed end of the suction pipe 100 is moved above the material to suck it up. During the suction process, the flushing water impacts and crushes the material passing through the suction end 101.

[0048] At least a portion of the flushing water, such as atomized water, sprayed by the water spraying mechanism 200 is first drawn into the suction tube 100 and pre-formed into a water film on the inner circumferential wall of the suction tube 100 under the action of the airflow. This water film can effectively reduce the coefficient of friction between the subsequently entering material and the inner wall of the suction tube 100, and prevent the material from directly contacting the inner wall of the suction tube 100, thereby avoiding direct adhesion of material caused by van der Waals forces, electrostatic forces, etc. A small amount of adhered material is also easily washed away by the subsequent water flow and airflow. In addition, the flushing water sprayed by the water spraying mechanism 200 can impact and break the material passing through the feed end into small particles, which are not only easier to be carried and transported by the airflow in the suction tube 100, but also prevent the material from directly impacting and clogging the suction port of the suction tube 100 due to its large size. Furthermore, the reduced material size, inertia, and adhesion area make it less likely to adhere to the inner wall of the suction tube 100.

[0049] The material conveying device according to a third aspect of this application includes the suction assembly described in the first aspect of the present application.

[0050] By employing the suction assembly of the first aspect embodiment of this application, when the straw 100 sucks in material, it can effectively prevent the material from adhering to the inner wall of the straw 100, thus ensuring the long-term unobstructed flow of the straw 100.

[0051] Since the material conveying equipment can adopt all the technical solutions of the suction component of the first aspect embodiment described above, it has at least all the beneficial effects brought about by the technical solutions of the first aspect embodiment described above. These additional beneficial effects will not be elaborated here.

[0052] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A pick-up assembly, characterized by The application relates to a suction device for a material suction assembly. The suction device comprises: a suction pipe for connecting a negative pressure mechanism, a bottom end of the suction pipe forming a material suction end; 2. The suction assembly of claim 1, wherein, a water spraying mechanism arranged at the material suction end for spraying flushing water, the flushing water being used for impacting and crushing material passing through the material suction end, and at least part of the flushing water being able to be sucked into the suction pipe and forming a water film on an inner circumferential wall of the suction pipe under the action of airflow in the suction pipe. The suction pipe comprises: a suction pipe body; 3. The suction cup assembly of claim 2, wherein, a flow guide pipe connected to a bottom end of the suction pipe body, the flow guide pipe comprising a flared section coaxially arranged at the bottom end of the suction pipe body, an inner diameter of the flared section gradually increasing from top to bottom, and a bottom end of the flared section forming the material suction end.

4. The suction cup assembly of claim 2, wherein, The flow guide pipe further comprises a straight pipe section coaxially inserted into the bottom end of the suction pipe body, an outer circumferential wall of the straight pipe section being attached to an inner circumferential wall of the suction pipe body, and the flared section being connected to a bottom end of the straight pipe section.

5. The suction cup assembly of claim 2, wherein, An included angle between an outer contour of a longitudinal section of the flared section and an axial center line of the flared section is alpha, and 30 DEG <= alpha <= 60 DEG is satisfied.

6. The suction cup assembly of claim 1, wherein, An inner diameter of the bottom end of the flared section is D, and an inner diameter of the bottom end of the suction pipe body is d, and 1.15d <= D <= 1.25d is satisfied. The water spraying mechanism comprises: a ring-shaped water pipe arranged outside the material suction end and surrounding the material suction end; 7. The suction cup assembly of claim 6, wherein, a plurality of nozzles arranged at the ring-shaped water pipe and arranged along a circumferential direction of the ring-shaped water pipe.

8. The suction cup assembly of claim 1, wherein, A spraying direction of the nozzles extends in a direction of approaching the axial center line of the material suction end and downwardly. The material suction assembly further comprises:

9. A suction method based on the suction assembly according to any one of claims 1 to 8, characterized in that, a material bin, one side of the material bin protruding outwardly to form a feeding cavity, a bottom wall of the feeding cavity extending upwardly in a direction away from the material bin, the bottom wall of the feeding cavity being provided with a feeding port, the feeding port being connected to a top end of the suction pipe, and a top end of the material bin being provided with a negative pressure port, the negative pressure port being used for connecting a negative pressure mechanism. The application relates to a material suction method. The method comprises the following steps:

10. A material conveying apparatus, characterized by, starting a negative pressure mechanism and a water spraying mechanism, the negative pressure mechanism forming negative pressure in a suction pipe, and the water spraying mechanism spraying flushing water, at least part of the flushing water being sucked into the suction pipe and forming a water film on an inner circumferential wall of the suction pipe; moving a material suction end of the suction pipe to above material to perform material suction, and the flushing water impacting and crushing material passing through the material suction end during the material suction. The application further relates to a material suction assembly. The material suction assembly comprises the suction device.

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