Material conveying system

Abstract

The utility model relates to a material conveying system which comprises a stirring working state and comprises a liquid storage container, a stirring device, a stirring device and a control device. The conveying pipe is communicated to the liquid storage container; the liquid return part is arranged on the conveying pipe and is configured to drive the materials to intermittently and reversely flow in the conveying pipe in a stirring working state, and the materials are driven to positively flow in the conveying pipe by utilizing negative pressure generated by reverse flow in at least part of pipelines of the conveying pipe in an intermittent period, so that the materials can be conveyed to the conveying pipe through the liquid return part; and the reciprocating flow of the material is realized. According to the scheme, materials in the conveying pipe are backflushed to the liquid storage container through the liquid return part, the materials in the liquid storage container are sucked into the conveying pipe through negative pressure, the two actions are alternately carried out to stir the materials, the forward discharging function and the reverse backflow stirring function are integrated through the single conveying pipe, the single-pipeline double-function design is achieved, and the stirring efficiency is improved. A pipeline system is simplified, and cleaning and maintenance are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid delivery, in particular to a material delivery system. BACKGROUND

[0002] At present, the beverage containing suspended particles or different density components is prone to sedimentation and stratification after long-term standing in the liquid storage container, resulting in uneven concentration of the discharged material and deterioration of the taste. The traditional solutions include:

[0003] 1. Additional mechanical stirring device: additional stirring motor and blade are required, resulting in complex equipment structure and cleaning dead angle, and it is not suitable for bagged liquid storage containers, and the universality is poor;

[0004] 2. Multi-pipeline circulation system: the material mixing is realized by adding independent circulation pipeline, but the number of pipeline branches increases, and it is difficult to clean and easy to leave residual deteriorated material.

[0005] Therefore, there is an urgent need for an integrated solution with simple structure and both delivery and anti-sedimentation stratification functions. CONTENT OF THE UTILITY MODEL

[0006] Based on this, the utility model provides a material delivery system to solve the problems of complex structure and difficult cleaning of the stirring device of the existing delivery system.

[0007] The utility model provides a material delivery system, the material delivery system includes stirring working state, the material delivery system includes:

[0008] A liquid storage container configured to store a material;

[0009] A delivery pipe connected to the liquid storage container;

[0010] A liquid return member disposed on the delivery pipe, configured to drive the material to flow reversely in the delivery pipe intermittently and to flow forward in the delivery pipe by using the negative pressure generated in the at least part of the pipeline of the delivery pipe during the intermittent period, so as to realize the reciprocating flow of the material, in the stirring working state.

[0011] In one embodiment, in the stirring working state, during the process that the liquid return member drives the material to flow reversely intermittently, the driving the material to flow reversely in the delivery pipe intermittently includes:

[0012] When the liquid return member drives the material to flow, the liquid return member forms a negative pressure in the pipe section located on the side of the liquid return member away from the liquid storage container;

[0013] The negative pressure generated in the at least part of the pipeline of the conveying pipe by the reverse flow during the intermittent period drives the forward flow of the material in the conveying pipe.

[0014] When the material flow is not driven by the liquid returning member, the liquid returning member communicates the pipeline section forming the negative pressure with the liquid storage container to re-suck the material in the liquid storage container into the conveying pipe by the negative pressure effect.

[0015] In one embodiment, the liquid returning member is provided with a control member on the pipeline away from the liquid storage container;

[0016] The material conveying system further comprises a discharging working state, in which at least one of the control member and the liquid returning member is configured to drive the forward flow of the material in the conveying pipe, and when one of the members drives the forward flow of the material, the other member is in the conducting or driving state.

[0017] In the stirring working state, the control member is configured to block the conveying pipe.

[0018] In one embodiment, the liquid returning member is configured to be in the conducting state and not to act in the discharging working state.

[0019] The control member is configured to drive the forward flow of the material in the discharging working state, and the control member is a power pump.

[0020] In one embodiment, the liquid returning member is configured to drive the forward flow of the material in the discharging working state.

[0021] The control member is a power pump configured to drive the forward flow of the material in the discharging working state, or the control member is a control valve configured to be in the conducting state in the discharging working state.

[0022] In one embodiment, the conveying pipe is a hose.

[0023] The liquid returning member comprises a squeezing head and a driver for driving the squeezing head to move intermittently along part of the pipeline of the conveying pipe, and the squeezing head squeezes the conveying pipe during the movement of the squeezing head along the conveying pipe.

[0024] In one embodiment, the squeezing head comprises a rolling member rotatably arranged on the driver.

[0025] In one of the embodiments, the driver is a rotary driving structure, which drives the extrusion head to run along a circular track, and the conveying pipe is arranged at least partially on the circular track.

[0026] In one of the embodiments, the driver comprises a motor and a mounting disc coaxially connected to the motor, and the extrusion head is arranged on the mounting disc.

[0027] The liquid returning member further comprises an extrusion cover, which is provided with a concave cavity with an arc-shaped wall surface, and a part of the conveying pipe is arranged in the concave cavity and attached to the arc-shaped wall surface.

[0028] When the driver drives the extrusion head to rotate along the arc-shaped wall surface, the conveying pipe is extruded on the arc-shaped wall surface.

[0029] In one of the embodiments, the driver is provided with a position sensing element, which is configured to determine the position of the extrusion head.

[0030] Compared with the prior art, the material conveying system has at least the following beneficial effects:

[0031] The material conveying system can realize the reciprocating flow of the material in the liquid storage container and the conveying pipe through the action of the liquid returning member, and can realize the sufficient stirring of the material without mechanical stirring device by using the impact force of the reverse flow of the material and the negative pressure suction force of the forward suction, so as to prevent the phenomenon of material stratification and ensure the uniform conveying of the material.

[0032] Moreover, the system integrates the forward discharging and reverse flow stirring functions through a single conveying pipe, realizes the single-pipe dual-function design, simplifies the pipeline system, is conducive to cleaning and maintenance, and the backflow port and the liquid outlet port are the same, which can not only avoid or eliminate the blockage of the liquid outlet port, but also can more accurately stir the sediment near the liquid outlet port, so that the uniformity of the material near the liquid outlet port is better, and the uniformity in the next feeding is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is a structural schematic diagram of a material conveying system in one embodiment;

[0034] Figure 2 FIG. 2 is a schematic diagram of the material flow of the material conveying system in one embodiment under a first discharging mode;

[0035] Figure 3 FIG. 3 is a schematic diagram of the material flow of the material conveying system in one embodiment under a second discharging mode;

[0036] Figure 4 FIG. 4 is a schematic diagram of the material flow of the material conveying system in one embodiment under a third discharging mode.

[0037] Figure 5 Fig. 1 is a schematic diagram of the material flow in the material conveying system in a stirring state according to an embodiment of the present application.

[0038] Figure 6 Fig. 2 is a schematic diagram of the structure of the liquid return device including two extrusion heads in the material conveying system according to an embodiment of the present application.

[0039] The reference signs in the drawings of the specification include: liquid storage container 100, conveying pipe 200, liquid return device 300, extrusion head 310, driver 320, motor 321, mounting disc 322, extrusion cover 330, first position 340, second position 350, concave cavity 360, arc-shaped wall 370, control device 400. DETAILED DESCRIPTION

[0040] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0041] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concepts of the present application.

[0042] The structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the limiting conditions that can be implemented by the present application. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0043] The orientations or positional relationships indicated by the terms such as "upper", "lower", "left", "right", "intermediate", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. in the present specification are based on the orientations or positional relationships shown in the drawings, and are only used to simplify the description, and cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for description purposes and cannot be understood as indicating or implying relative importance.

[0044] As described in the background, the beverage containing suspended particles or different density components is prone to stratification after long-term standing in the liquid storage container, resulting in uneven concentration of the discharged material and deterioration of the taste.

[0045] In the conventional solution, the mechanical stirring device needs to be additionally configured with a stirring motor and a blade, resulting in a complex device structure and a cleaning dead angle, and is not suitable for a bagged liquid storage container, and has poor versatility; and the multi-pipeline circulation system needs to be additionally configured with an independent circulation pipeline to realize material mixing, but the number of pipeline branches increases, cleaning is difficult and residual deteriorated materials are prone to be left.

[0046] Based on this, the utility model embodiment provides a material conveying system, which comprises a stirring working state, referring to Figure 1 , the material conveying system specifically comprises:

[0047] The liquid storage container 100 is configured to store materials;

[0048] The conveying pipe 200 is communicated to the liquid storage container 100;

[0049] The liquid return member 300 is arranged on the conveying pipe 200 and is configured to drive the materials to flow reversely in the conveying pipe 200 intermittently and to flow forward in the conveying pipe 200 by using the negative pressure generated by the reverse flow in the at least part of the pipeline of the conveying pipe 200 during the intermittent period, so as to realize the reciprocating flow of the materials in the stirring working state.

[0050] According to the material conveying system of the utility model embodiment, when the materials in the liquid storage container 100 need to be stirred, the stirring working state is switched to, and in the stirring working state, the liquid return member 300 drives the materials to flow reversely in the conveying pipe 200 intermittently, so that the materials flow reversely into the liquid storage container 100 along the conveying pipe 200, the stirring of the materials in the liquid storage container 100 is realized by using the backflow impact force, and the materials are more uniform.

[0051] The intermittent period can be understood as a time period when the materials are not driven by the liquid return member 300 during the process of driving the materials to flow reversely intermittently. For example, during the process of driving the materials to flow reversely intermittently by the liquid return member 300, the time period includes a material driving time period and an intermittent time period.

[0052] During the material driving time period, the liquid return member 300 can drive the materials to flow reversely, and at the same time, the liquid return member 300 can have a continuous suction force on the pipe section located on the side of the liquid return member 300 away from the liquid storage container 100, so that a negative pressure is formed in the pipe section.

[0053] During the intermittent time period, the liquid return member 300 does not drive the materials to flow, and the liquid return member 300 can make the pipe section, in which the negative pressure is formed during the driving period, communicated to the liquid storage container 100, at this time, the materials in the liquid storage container 100 can be reabsorbed into the conveying pipe 200 under the action of the negative pressure effect in the pipeline.

[0054] The above intermittent time period is the intermittent period.

[0055] Thus, in the stirring working state, the liquid returning member 300 can realize the alternating operation of the two actions of the reverse driving of the material and the forward negative pressure suction of the material, so that the reciprocating flow of the material can be realized, the flow rate of the material in the stirring process can be improved, the stirring efficiency can be enhanced, and the impact force of the reverse flow of the material and the negative pressure suction force of the forward suction can be used to realize the full stirring of the liquid-free internal mechanical stirring device, so that the phenomenon of material static stratification is prevented, and the uniform conveying of the material is ensured.

[0056] Moreover, the liquid returning member 300 of the present scheme intermittently drives the reverse flow of the material, so that the negative pressure of the pipe section away from the liquid storage container 100 side of the liquid returning member 300 can be released in time, and the pipe explosion phenomenon is avoided.

[0057] In addition, the present scheme can integrate the forward discharging and reverse flow stirring functions through the single conveying pipe 200, realize the single-pipe dual-function design, simplify the pipeline system, and be conducive to cleaning and maintenance; and the backflow port and the liquid outlet port are the same, which can not only avoid or eliminate the blockage of the liquid outlet port, but also can more accurately stir the sediment near the liquid outlet port, so that the uniformity of the material near the liquid outlet port is better, and the uniformity in the next feeding is ensured.

[0058] The material conveying system provided by the embodiment of the present application will be described in detail below with reference to the drawings.

[0059] According to Figure 1 The material conveying system exemplarily showing at least one embodiment of the present application comprises a liquid storage container 100, a conveying pipe 200 and a liquid returning member 300.

[0060] The liquid storage container 100 is used for storing material and is a material supply end of the present material conveying system, and supplies corresponding material for the user in use.

[0061] It should be noted that the material stored in the liquid storage container 100 in the present embodiment is mainly fluid material, more specifically, mainly fluid material containing suspended particles or different density components, such as fruit juice containing fruit pulp. Such material is usually prone to sedimentation and stratification after standing for a period of time, resulting in uneven discharging. The present conveying system can be used for mixing and uniformizing such material to realize uniform conveying of the material and facilitate the user to provide beverages with uniform concentration and good taste.

[0062] It is not difficult to understand that the present liquid storage container 100 can also be used to store conventional fluid material (fluid material with consistent density and uniform distribution), and when conveying such material through the conveying system, only the conveying function of the conveying system can be used without mixing and uniformizing operation.

[0063] It should be understood that in the present embodiment, the liquid storage container 100 mainly serves as a storage carrier, and its specific form is not limited herein, and in actual use, it can adopt various forms according to the type of the stored material and the use environment.

[0064] For example, in some examples, the liquid storage container 100 can be a tank, a bottle, a cylinder or a bag container, which can be made of hard and non-deformable material or flexible and deformable material, and can have a square body, a cylindrical body, a spherical body, etc.

[0065] Referring to Figure 1 The liquid storage container 100 is connected with a delivery pipe 200, through which the material in the liquid storage container 100 can be guided to a designated position or component to achieve material supply.

[0066] Specifically, in the present embodiment, the delivery pipe 200 is a single pipe, and its two ends are respectively a feeding end and a discharging end. The feeding end is connected to the liquid storage container 100 to realize the communication between the liquid storage container 100 and the delivery pipe 200, and the discharging end is connected to a designated position or component, for example, when applied to a spitting device, the discharging end can be connected to a spitting head, so as to realize the material supply from the liquid storage container 100 to the spitting head through the delivery pipe 200.

[0067] In the present embodiment, the type of the delivery pipe 200 can be a metal hard pipe or a plastic soft pipe, as long as it can ensure the delivery and guidance of the material.

[0068] Further, in the present embodiment, the delivery pipe 200 is preferably a soft pipe, so that the delivery pipe 200 has the characteristics of being easily bent, squeezed and recovered, so as to facilitate the pipeline layout of the delivery pipe 200, and also provides a basis for driving the material delivery by using a peristaltic pump in the following.

[0069] Specifically, the delivery pipe 200 can adopt a food-grade silicone hose, and its pipe diameter and length can be determined according to the actual use scene, which is not limited in the present embodiment.

[0070] In addition, in the present embodiment, the specific position of the connection between the delivery pipe 200 and the liquid storage container 100 can also be not limited, as long as the delivery pipe 200 can basically extract all the material in the liquid storage container 100, that is, the delivery pipe 200 can be connected from various directions of the liquid storage container 100, such as from the top, middle or bottom of the liquid storage container 100.

[0071] The connecting position of the conveying pipe 200 to the inside of the liquid storage container 100 can be designed differently for different materials of the liquid storage container 100. For example, when the liquid storage container 100 is made of hard material, it will not deform by itself, and the feeding end of the conveying pipe 200 needs to extend to the bottom of the liquid storage container 100, no matter from which direction the conveying pipe 200 is connected to the liquid storage container 100, so as to facilitate the suction of the material. When the liquid storage container 100 is made of flexible material, it has a deformable performance, and then the conveying pipe 200 can realize the suction of the material through the deformation of the liquid storage container 100 even if the conveying pipe 200 does not extend to the bottom of the liquid storage container 100, so in this case, it is only necessary to ensure that the feeding end of the conveying pipe 200 is connected to the liquid storage container 100.

[0072] Referring to Figure 1 In the embodiment, the conveying pipe 200 is preferably connected directly from the bottom of the liquid storage container 100. For example, the bottom of the liquid storage container 100 is provided with a liquid outlet, and the conveying pipe 200 is connected to the liquid outlet, so that the length of the conveying pipe 200 can be reduced, the cost can be reduced, and the material can be more easily fed into the conveying pipe 200 under the action of gravity, and the material can be more easily conveyed.

[0073] Referring to Figure 1 The conveying pipe 200 is provided with a liquid returning member 300 and a control member 400, wherein the liquid returning member 300 is located between the control member 400 and the liquid storage container 100.

[0074] In the embodiment, the liquid returning member 300 and the control member 400 are components for driving the flow of the material or controlling the on-off of the conveying pipe 200, and based on the control switching of the liquid returning member 300 and the control member 400, the control switching of the stirring working state and the discharging working state of the material conveying system can be realized.

[0075] Specifically, in the stirring working state, the liquid returning member 300 is used to drive the material to flow reversely in the conveying pipe 200 intermittently, and the control member 400 is used to block the conveying pipe 200. The "reverse" can be understood as the direction from the discharging end to the feeding end of the conveying pipe 200.

[0076] In the above embodiment, the driving of the material to flow reversely intermittently by the liquid returning member 300 can be understood as that one operation cycle of the liquid returning member 300 includes a material driving period and an intermittent period.

[0077] When the liquid return member 300 is in the material driving period, a driving force can be applied to the material to make the material flow reversely, and the impact force of the material flowing reversely can fully stir the material in the liquid storage container 100 without liquid internal mechanical stirring device, preventing the material from being stratified by standing. During this period, the liquid return member 300 has suction to the pipe segment between the liquid return member 300 and the control member 400, and the control member 400 blocks the conveying pipe 200, so that the closed pipe segment between the liquid return member 300 and the control member 400 forms a negative pressure.

[0078] When the liquid return member 300 is in the intermittent period of the same operation cycle, there is no driving force for the material, and the liquid return member 300 is in the conducting state, so that the liquid storage container 100 is in communication with the pipe segment forming a negative pressure when flowing reversely. At this time, the negative pressure in the pipe segment can generate a positive suction force on the material in the liquid storage container 100, so that the material is reabsorbed into the conveying pipe 200.

[0079] Based on the above, when the liquid return member 300 operates for multiple operation cycles, the material in the conveying pipe 200 is intermittently back-flushed into the liquid storage container 100, and the material in the liquid storage container 100 is intermittently positively sucked into the conveying pipe 200, and the two actions are alternately and cyclically performed, so that the impact force of the material flowing reversely and the negative pressure suction force of the positive suction can be used to fully stir the material, prevent the material from being stratified by standing, and also accelerate the rate of reciprocating flow of the material, thereby improving the stirring effect.

[0080] In the present embodiment, in the discharging working state, at least one of the control member 400 and the liquid return member 300 can drive the material to flow forward in the conveying pipe 200, and when one of them drives the material to flow forward, the other one is in the conducting state or drives the material to flow forward. The "forward" can be understood as the direction from the material inlet end to the material outlet end of the conveying pipe 200.

[0081] The above description can be understood as including the following three discharging modes:

[0082] I. In the discharging working state, referring to Figure 2 The liquid return member 300 provides a driving force for the forward flow of the material, and the control member 400 does not provide a driving force, but only plays a conducting role. In this case:

[0083] The liquid return member 300 can be a power pump capable of bidirectional action, for example, a bidirectional gear pump with a bypass valve, which is reversed during backflow stirring, and is intermittently started to drive the material to flow reversely, and is stopped through the bypass valve to conduct the conveying pipe 200 to achieve intermittent conduction of the conveying pipe 200; and continuously rotates forward to drive the material to flow forward during discharging.

[0084] The control member 400 can be a control valve, such as an electrically controlled stop valve, an electrically controlled gate valve, etc., which blocks the delivery pipe 200 during backflow stirring and opens the delivery pipe 200 during discharging.

[0085] II. In the discharging working state, referring to Figure 3 , the backflow member 300 provides driving force for the forward flow of the material, and the control member 400 also provides driving force for the forward flow of the material. In this case,

[0086] Similarly, the backflow member 300 can be a power pump capable of bidirectional action, such as a bidirectional gear pump with a bypass valve, which operates in the same way as in the first discharging mode.

[0087] Meanwhile, the control member 400 also provides driving force for the power pump, which blocks the delivery pipe 200 during backflow stirring and provides driving force during discharging. In order to ensure that the control member 400 can block the delivery pipe 200 in the stirring working state, the control member 400 needs to be selected as a power pump that does not open when not in action, such as a power pump with a stop cutoff function, or a combination of a power pump and a control valve to achieve this function.

[0088] III. In the discharging working state, referring to Figure 4 , the control member 400 provides driving force for the forward flow of the material, and the backflow member 300 does not provide driving force, only opening. In this case,

[0089] The control member 400 adopts a power pump. Similarly, in order to ensure that the control member 400 can block the delivery pipe 200 in the stirring working state, the control member 400 needs to be selected as a power pump that does not open when not in action, such as a power pump with a stop cutoff function, or a combination of a power pump and a control valve to achieve this function.

[0090] The backflow member 300 can be selected as a power pump that opens in the stop state, such as a gear pump with a bypass valve, which is started intermittently during backflow stirring to drive the intermittent reverse flow of the material and intermittently opens the delivery pipe 200 through the bypass valve; and during discharging, the delivery pipe 200 is opened through the bypass valve.

[0091] Therefore, through the combination of double pumps or the combination of a single pump and a control valve, the control switching of the stirring working state and the discharging working state of the material conveying system can be realized.

[0092] Specifically, the control member 400 in the second discharging mode and the third discharging mode can adopt a gear pump, a peristaltic pump, a plunger pump, a screw pump, etc.

[0093] In the embodiment, the control member 400 is preferably a peristaltic pump, denoted as a conveying peristaltic pump. The peristaltic pump is a kind of pump that realizes fluid conveying by extruding a hose, and its conveying precision can reach up to ±0.5%, which can meet the requirements of quantitative conveying and quantitative distribution.

[0094] Moreover, the control member 400 adopts the peristaltic pump, so that when installed, the conveying pipe 200 adopting the hose can be directly installed in the peristaltic pump, which can realize the purpose of material conveying through a single pipe, avoids pipe butt joint, and has a simpler structure, which is beneficial to cleaning.

[0095] It should be noted that in the above embodiment, the structure of the peristaltic pump and the installation mode between the conveying pipe 200 and the peristaltic pump are conventional technical means, which will not be described here.

[0096] Further, in the embodiment, corresponding to the control member 400 being a peristaltic pump, the peristaltic pump includes at least two rollers, and at least one of the rollers is in a position extruding the conveying pipe 200 when the peristaltic pump is stopped. In this way, the conveying pipe 200 can be blocked by the rollers extruding the conveying pipe 200, so as to avoid material flow, thereby blocking the conveying pipe 200 in the stirring working state.

[0097] The liquid return member 300 in the above first, second and third discharging modes can be realized by the following structure:

[0098] Referring to Figure 1 , the liquid return member 300 includes an extrusion head 310 and a driver 320 for driving the extrusion head 310 to move along part of the conveying pipe 200 intermittently, and the extrusion head 310 extrudes the conveying pipe 200 during movement along the conveying pipe 200, and releases the conveying pipe 200 after being separated from the conveying pipe 200.

[0099] Further, referring to Figure 1 , the extrusion head 310 includes a rolling member rotatably arranged on the driver 320, for example, the rolling member can be a roller, which can rotate during extruding the conveying pipe 200, so as to reduce the friction between the surface of the roller and the surface of the conveying pipe 200, improve the smoothness of operation, and reduce the wear of the conveying pipe 200.

[0100] Further, referring to Figure 1 , the driver 320 drives the extrusion head 310 to move along a circular track, and the part of the conveying pipe 200 is arranged on the circular track. In this way, the intermittent movement on the conveying pipe 200 can be realized by the one-way rotation of the extrusion head 310, which has a simpler operation mode and is more convenient to control.

[0101] Specifically, referring to Figure 1The driver 320 can include a motor 321 and a mounting disc 322 fixed on the output shaft of the motor 321, and the extrusion head 310 is mounted on the outer peripheral side of the mounting disc 322, so that when the motor 321 drives the mounting disc 322 to rotate, the extrusion head 310 can be driven to rotate around the circumference, forming a circular motion track.

[0102] Referring to Figure 1 The liquid return member 300 further includes an extrusion cover 330, and the extrusion cover 330 is provided with a concave cavity 360 having an arc-shaped wall surface 370. The diameter of the circle where the arc-shaped wall surface 370 is located is slightly larger than the diameter of the outer track of the rotation of the extrusion head 310, and the difference between the diameters is less than twice the wall thickness of the conveying pipe 200. A part of the conveying pipe 200 is mounted in the concave cavity 360 by being fitted to the arc-shaped wall surface 370, so that when the driver 320 drives the extrusion head 310 to rotate through the arc-shaped wall surface 370, the conveying pipe 200 can be extruded on the arc-shaped wall surface 370.

[0103] Based on the above structural design, the liquid return member 300 forms a single-roller peristaltic pump. In the stirring working state, referring to Figure 5 The use process is as follows:

[0104] Firstly, the driver 320 drives the extrusion head 310 to move to the first position 340 of the conveying pipe 200, forming extrusion on the conveying pipe 200;

[0105] Then, the driver 320 drives the extrusion head 310 to move in the reverse direction of the conveying pipe 200 while keeping extrusion on the conveying pipe 200. In this process, the extrusion head 310 drives the material in the conveying pipe 200 to the liquid storage container 100 in the reverse direction, and at the same time, the pipe segment between the liquid return member 300 and the control member 400 forms a negative pressure;

[0106] After the driver 320 drives the extrusion head 310 to move to the second position 350 of the conveying pipe 200, the extrusion head 310 releases the conveying pipe 200, and at this time, the pipe segment forming the negative pressure is in communication with the liquid storage container 100, and the material in the liquid storage container 100 is reabsorbed into the conveying pipe 200;

[0107] Subsequently, the driver 320 drives the extrusion head 310 to move to the first position 340 of the conveying pipe 200 again, and then repeats the above operation to realize intermittent backflow driving of the material.

[0108] In the discharging working state, corresponding to the first and second discharging modes, the driver 320 drives the extrusion head 310 to rotate forward to realize forward driving of the material; and corresponding to the third discharging mode, the extrusion head 310 is operated to a position where the conveying pipe 200 is not extruded, so that the conveying pipe 200 can be kept in communication, and the material is discharged by the control member 400.

[0109] Further, in the embodiment, the length of time that the material is driven to flow is greater than the length of time that the material is not driven to flow in one cycle of the liquid return member 300. For example, the length of time that the material is driven to flow can be twice the length of time that the material is not driven to flow. In this way, the impact of the return flow of the material can be enhanced, the return flow mixing effect can be improved, and the mixing efficiency can be improved.

[0110] Specifically, corresponding to the liquid return member 300 with the single roller structure, one cycle of the liquid return member 300 refers to the extrusion head 310 rotating 360 degrees. Accordingly, as long as the central angle of the arc-shaped wall 370 is greater than 180 degrees, the length of time that the material is driven to flow can be greater than the length of time that the material is not driven to flow in one cycle of the liquid return member 300.

[0111] In other embodiments, the number of extrusion heads 310 can also be two, three, etc., to form a peristaltic pump with two, three, etc. rollers.

[0112] For example, the central angle between any two adjacent extrusion heads 310 is greater than the central angle of the arc-shaped wall 370, so as to ensure that when the previous extrusion head 310 moves to the second position 350, the subsequent extrusion head 310 has not yet moved to the first position 340, thereby ensuring that the conveying pipe 200 is not extruded during the operation of the liquid return member 300, so as to ensure that the negative pressure can be released and the pipe is communicated in the discharging state. Figure 6 An embodiment in which the number of extrusion heads 310 is two is shown.

[0113] For another example, the number of extrusion heads 310 is two, and the central angle of the two extrusion heads 310 is less than the central angle of the arc-shaped wall 370. In this way, during the return flow mixing, the two extrusion heads 310 move counterclockwise to press the liquid back to the liquid storage container 100. During this process, when the material between the control member 400 and the liquid return member 300 is sucked out, the two extrusion heads 310 simultaneously extrude the conveying pipe 200 between the two extrusion heads 310 to the arc-shaped wall 370, and the conveying pipe 200 between the two extrusion heads 310 is in a negative pressure state. Then, when the previous two extrusion heads 310 move out of the arc-shaped wall 370 counterclockwise, the conveying pipe 200 between the two extrusion heads 310 is communicated with the liquid storage container 100, and the material in the liquid storage container 100 can be sucked out of the conveying pipe 200 again through the negative pressure. Subsequently, the subsequent two extrusion heads 310 continue to move counterclockwise to extrude the sucked material outward. When the previous two extrusion heads 310 move to the arc-shaped wall 370 again, the above-mentioned actions of extruding the material and sucking the material through the negative pressure are repeated, so as to drive the material to flow intermittently in the reverse direction and realize the mixing function.

[0114] Further, the driver 320 is provided with a position sensing element (not shown in the figure), for example, the position sensing element can be an encoder, a Hall sensor, etc., which is arranged on the motor 321 and can monitor the rotating position of the rotating shaft of the motor 321, and then the position of the extrusion head 310 can be accurately known, thereby providing a basis for the switching of the discharging tool state and the stirring working state of the system.

[0115] The material conveying system provided by the utility model is used, comprising steps S1 to S3.

[0116] Step S1, conveying judgment, judging whether the material in the liquid storage container 100 meets the direct conveying condition, if the direct conveying condition is met, executing step S2, if not, executing step S3.

[0117] The direct conveying condition is that the material standing time is less than the second time t2 in the standing state, and the material time from the last stirring is less than the third time t3 in the conveying state.

[0118] The standing state means that the material stands in the liquid storage container 100, which can be understood as at least t4 time without material conveying and stirring. In this state, the material in the liquid storage container 100 is easy to produce standing deposition and stratification, resulting in uneven distribution of the material, which is not conducive to uniform conveying of the material.

[0119] Correspondingly, the material standing time is less than the second time t2, which means that the material standing time is not long, and in this time period, the material deposition and stratification phenomenon in the liquid storage container 100 has not occurred or is not obvious, so that the material conveying can still ensure the uniformity of the material conveying; when the material standing time exceeds the second time t2, it means that the material standing time is long, and the material in the liquid storage container 100 has obvious deposition and stratification phenomenon, and the material distribution is uneven, so that the material conveying cannot guarantee the uniformity of the material conveying, and therefore needs to be mixed and stirred before conveying. Wherein, t2 is greater than t4, for example, t2 is 80 minutes, and t4 is 60 minutes.

[0120] The conveying state means that the material in the liquid storage container 100 is being conveyed by the conveying system, and in this state, the material in the liquid storage container 100 has a certain fluidity, but long time without stirring is still easy to produce deposition and stratification, resulting in uneven distribution of the material, which is not conducive to uniform conveying of the material.

[0121] It should be understood that the conveying in the conveying state can be continuous conveying or intermittent conveying. Wherein, the intermittent conveying means that the control member 400 can be closed for a period of time after one feeding and then started again in the conveying process, but the time interval is short, less than t4, and does not belong to the standing state.

[0122] Correspondingly, in the conveying state, the time from the last stirring is less than the third time t3, which means that the time from the last stirring is not long, and in this time period, the material in the storage container 100 has not yet occurred or is not obvious, and the conveying of the material can ensure the uniformity of the material conveying; when the time from the last stirring exceeds the third time t3, it means that the material has not been stirred for a long time, although the material remains flowing, but there is a significant sedimentation and stratification phenomenon, and the material is not uniformly distributed, so the conveying of the material cannot guarantee the uniformity of the material conveying, and therefore needs to be mixed and stirred before conveying.

[0123] That is, in the conveying state, the system will stir the material in the storage container 100 at a time interval of the third time t3, to ensure the uniformity of the material. Among them, t3 is greater than t2, for example, 100 minutes.

[0124] It should be understood that in the present embodiment, the values of the second time t2 and the third time t3 can be set differently according to different materials, specifically, the faster the sedimentation and stratification occurs, the smaller the values of the second time t2 and the third time t3, and vice versa. The specific values of the second time t2 and the third time t3 corresponding to different materials can be obtained by experience or experiment, and the present embodiment does not enumerate them one by one.

[0125] In addition, the setting and timing of the second time t2 and the third time t3 can be controlled by a controller, which is connected to the material conveying system and controls the opening and closing of the control member 400 and the liquid return member 300. The controller can be a PLC (Programmable Logic Controller). For example, in the static state, the timing of the second time t2 can be started when the liquid return member 300 and the control member 400 are closed, or when a flow sensor is provided in the conveying system, the timing of the second time t2 can be started when the flow sensor detects that the material flow of the system is stable and remains 0. In the conveying state, the timing of the third time t3 can be started after exiting the stirring working state.

[0126] S2, material conveying, setting the material conveying system to the discharging working state, driving the material in the storage container 100 to flow forward along the conveying pipe 200 for material conveying, and stopping the control member 400 after the material conveying amount meets the demand.

[0127] For example, corresponding to the above embodiment in which the control member 400 is a peristaltic pump and the liquid return member 300 is a single-roller peristaltic pump. Referring to Figure 4 , by controlling the extrusion head 310 of the liquid return member 300 to remain in a stopped state without extruding the conveying pipe 200, and then starting the control member 400, that is, starting the conveying peristaltic pump, the material can be quantitatively conveyed.

[0128] The material conveying amount meeting the requirement can be understood as the discharging amount of the discharging end of the conveying pipe 200 meeting the requirement of beverage preparation, at which time the conveying peristaltic pump can be closed. It should be understood that the material conveying amount meeting the requirement can be different for different beverages.

[0129] S3, backflow stirring, setting the material conveying system to a stirring working state, the backflow member 300 acts and intermittently drives the material in the conveying pipe 200 to flow back to the liquid storage container 100, and the backflow impact force is used to stir the material in the liquid storage container 100, and when the backflow member 300 is in a conducting state, the negative pressure section of the conveying pipe 200 sucks part of the material in the liquid storage container 100 into the conveying pipe 200, realizing the reciprocating circulation flow of the material between the liquid storage container 100 and the conveying pipe 200, and performing circulation stirring. After the first circulation stirring time t1, step S2 is performed.

[0130] For example, corresponding to the above embodiment in which the control member 400 is a peristaltic pump and the backflow member 300 is a single-roller peristaltic pump. Referring to Figure 5 , the control member 400 is set to a closed state, and the conveying pipe 200 at this position is blocked; then the backflow member 300 is turned on, and the roller of the single-roller peristaltic pump is made to move in a counterclockwise direction to intermittently extrude the material in the conveying pipe 200 back into the liquid storage container 100, realizing backflow stirring of the material in the liquid storage container 100.

[0131] Wherein, performing step S2 after the first circulation stirring time t1 can be understood as that after the material in the liquid storage container 100 is stirred by backflow for the first time t1, the effect of sufficient mixing and uniform particle distribution is achieved, at which time the backflow stirring can be ended, and the material conveying operation of step S2 is performed.

[0132] Wherein, according to different materials, the value of the second time t can be set to be different.

[0133] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0134] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A material delivery system comprising a mixing work state, characterized by, The material conveying system comprises: a liquid storage container (100) configured to store material; a conveying pipe (200) connected to the liquid storage container (100); a liquid returning device (300) arranged on the conveying pipe (200) and configured to drive the material to flow reversely in the conveying pipe (200) intermittently and to drive the material to flow forward in the conveying pipe (200) by using the negative pressure generated in the at least part of the pipe by the reverse flow during the intermittent period, so as to realize the reciprocating flow of the material.

2. The material conveying system according to claim 1, wherein in the stirring working state, the liquid returning device (300) drives the material to flow reversely intermittently, and the driving of the material to flow reversely intermittently comprises: when the liquid returning device (300) drives the material to flow, the liquid returning device (300) forms negative pressure in the pipe section on the side of the liquid returning device (300) away from the liquid storage container (100); the driving of the material to flow forward in the conveying pipe (200) by using the negative pressure generated in the at least part of the pipe by the reverse flow during the intermittent period comprises: when the liquid returning device (300) does not drive the material to flow, the liquid returning device (300) connects the pipe section with negative pressure to the liquid storage container (100) to reabsorb the material in the liquid storage container (100) into the conveying pipe (200) by the negative pressure effect.

3. The material conveying system according to claim 1 or 2, wherein a control device (400) is arranged on the pipe on the side of the liquid returning device (300) away from the liquid storage container (100); the material conveying system further comprises a discharging working state, in which at least one of the control device (400) and the liquid returning device (300) is configured to drive the material to flow forward in the conveying pipe (200), and when one of them drives the material to flow forward, the other one is in the state of being turned on or driving the material to flow forward; in the stirring working state, the control device (400) is configured to block the conveying pipe (200).

4. The material conveying system according to claim 3, wherein the liquid returning device (300) is configured to be inactive and in the state of being turned on in the discharging working state; the control device (400) is configured to drive the material to flow forward in the discharging working state, and the control device (400) is a power pump.

5. The material conveying system according to claim 3, wherein the liquid returning device (300) is configured to drive the material to flow forward along the conveying pipe (200) in the discharging working state. The control member (400) is a power pump configured to drive the material to flow forward in the discharging working state, or the control member (400) is a control valve configured to be in an on state in the discharging working state.

6. The material conveying system according to claim 4 or 5, characterized in that, the conveying pipe (200) is a hose; the liquid return member (300) comprises a squeezing head (310) and a driver (320) for driving the squeezing head (310) to move intermittently along a partial pipe section of the conveying pipe (200), and the squeezing head (310) squeezes the conveying pipe (200) during the movement of the squeezing head (310) along the conveying pipe (200).

7. A material delivery system according to claim 6, wherein, the squeezing head (310) comprises a rolling member rotatably arranged on the driver (320).

8. The material conveying system according to claim 6, characterized in that, the driver (320) is a rotary driving structure, the trajectory of the movement of the squeezing head (310) driven by the driver (320) is a circular trajectory, and the conveying pipe (200) is arranged at least partially on the circular trajectory.

9. The material conveying system according to claim 8, characterized in that, the driver (320) comprises a motor (321) and a mounting disc (322) coaxially connected to the motor (321), and the squeezing head (310) is arranged on the mounting disc (322); the liquid return member (300) further comprises a squeezing cover (330), the squeezing cover (330) is provided with a concave cavity (360) with an arc-shaped wall surface (370), and a partial pipe section of the conveying pipe (200) is arranged in the concave cavity (360) and attached to the arc-shaped wall surface (370); wherein, when the driver (320) drives the squeezing head (310) to rotate around the arc-shaped wall surface (370), the conveying pipe (200) is squeezed on the arc-shaped wall surface (370).

10. The material delivery system of claim 9, wherein, the driver (320) is provided with a position sensing element configured to determine the position of the squeezing head (310).

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