Feeding device

Abstract

The application relates to the technical field of film production, in particular to a feeding device. The feeding device is provided with a storage part and a feeding pump. The storage part is used for storing materials. The feeding pump comprises a feeding section, a conveying section and a discharging section which are sequentially arranged. The discharging section is used for being communicated with a mixer, and the feeding section is communicated with the storage part to input materials. The conveying section is provided with at least two conveying cavities which are sequentially arranged. Adjacent two conveying cavities are communicated with each other. The feeding section is communicated with the conveying cavity located at the head, and the discharging section is communicated with the conveying cavity located at the tail to jointly convey the materials to the mixer. In the conveying direction of the materials, the volumes of the at least two conveying cavities are sequentially reduced to gradually increase the pressure of the materials. The feeding device provided by the application can maintain the integrity of the dispersion system of the materials, reduce the back sliding of the materials and ensure the feeding stability.

Description

Technical Field

[0001] This application relates to the field of thin film production technology, and in particular to a feeding device. Background Technology

[0002] Low-viscosity film fillers (viscosity range 20~500 cP) need to react uniformly with the substrate in a mixer under high temperature and high pressure conditions to form a homogenized film material. In this process, the stability of the low-viscosity film filler feeding system directly affects the quality of the film material.

[0003] In the prior art, the feeding system includes a closed buffer mixing tank and a single-stage screw pump. The closed buffer mixing tank is used to store and initially mix low-viscosity film fillers to prevent the low-viscosity film fillers from settling or stratifying. The single-stage screw pump is used to quantitatively deliver the low-viscosity film fillers into the mixer. Furthermore, the low pressure inside the single-stage screw pump can maintain the integrity of the dispersion system of the low-viscosity film fillers during the delivery process.

[0004] However, the high-pressure mixer creates a high back pressure environment at the outlet of the single-stage screw pump, causing the low-viscosity thin-film packing inside the single-stage screw pump to slip back, thus affecting the stability of the feed. Utility Model Content

[0005] This application provides a feeding device that reduces material slippage while maintaining the integrity of the material dispersion system, thus ensuring feeding stability.

[0006] The feeding device provided in this application includes a storage unit and a feeding pump, wherein the storage unit is used to store materials.

[0007] The feed pump includes a feeding section, a conveying section and a discharge section arranged in sequence. The discharge section is used to connect with the mixer, and the feeding section is connected with the storage unit for inputting materials.

[0008] The conveying section has at least two conveying chambers arranged in sequence, with adjacent conveying chambers connected to each other. The feeding section is connected to the conveying chamber at the beginning, and the discharging section is connected to the conveying chamber at the end, so as to jointly convey the material to the mixer.

[0009] Along the material conveying direction, the volume of at least two conveying chambers decreases sequentially to gradually increase the pressure on the material.

[0010] In one possible implementation, the feeding device provided in this application includes a conveying section comprising at least two conveying components. Each conveying component includes a stator and a rotor disposed within the stator, with a conveying cavity formed between the stator and the rotor.

[0011] In one possible implementation, the feeding device provided in this application has at least two conveying components with the same stator volume, and the rotor volumes of the at least two conveying components increase sequentially along the material conveying direction.

[0012] Alternatively, the rotors of at least two conveying components have the same volume, and the stators of at least two conveying components decrease in volume sequentially along the material conveying direction.

[0013] In one possible implementation, the feeding device provided in this application has at least two conveying components with rotors rotating at the same speed.

[0014] In one possible implementation, the feeding device provided in this application has a feeding section with a feeding port and a feeding chamber connected to the feeding port. The feeding port is connected to a storage device, and the feeding chamber is connected to a conveying chamber located at the head. The feeding port is conical, and the flow area of ​​the feeding port gradually decreases along the direction toward the feeding chamber.

[0015] In one possible implementation, the feeding device provided in this application has a screw rod installed in the feeding chamber, with the screw rod corresponding to the feeding port, and the screw rod is used to stir the material.

[0016] In one possible implementation, the feeding device provided in this application further includes a discharge pipe for connecting the discharge section and the mixer. A nozzle is provided at one end of the discharge pipe away from the discharge section, and the nozzle is used to convey the material to the mixer.

[0017] In one possible implementation, the feeding device provided in this application is further provided with a back pressure valve on the discharge pipe, and the back pressure valve is located on the side of the nozzle facing the discharge section.

[0018] In one possible implementation, the feeding device provided in this application further includes a controller and a feed pipe, the feed pipe connecting the storage device and the feeding section; a first detection element and a regulating valve are provided on the feed pipe, the first detection element being used to detect the flow rate of the material in the feed pipe.

[0019] Both the first detection element and the regulating valve are connected to the controller. When the flow rate is greater than the preset flow rate, the controller controls the regulating valve to reduce the flow rate; when the flow rate is less than the preset flow rate, the controller controls the regulating valve to increase the flow rate.

[0020] In one possible implementation, the feeding device provided in this application further includes an exhaust pipe connected to the feed pipe. The feed pipe is also provided with a second detection element, which is located on the side of the regulating valve facing the feed section. The second detection element is used to detect the pressure inside the feed pipe, and the exhaust pipe is used to discharge some air bubbles inside the feed pipe when the pressure is less than the preset pressure.

[0021] In one possible implementation, the feeding device provided in this application further includes a metering pump and a return pipe. The storage device has a discharge port and a return port. The metering pump is connected to the discharge port and the feed pipe. The return pipe is connected to the feed pipe and the return port. The return pipe is configured to transport a portion of the material to the return port when the metering pump delivers the material output from the discharge port to the feed pipe.

[0022] The feeding device provided in this application includes a storage unit and a feeding pump. The storage unit is used to store materials. The feeding pump includes a feeding section, a conveying section, and a discharging section arranged sequentially. The discharging section is connected to a mixer, and the feeding section is connected to the storage unit for feeding materials. The conveying section has at least two conveying chambers arranged sequentially, with adjacent conveying chambers connected to each other. The feeding section is connected to the conveying chamber at the beginning, and the discharging section is connected to the conveying chamber at the end, to jointly convey the materials to the mixer. Along the material conveying direction, the volume of the at least two conveying chambers decreases sequentially to gradually increase the material pressure.

[0023] In this way, the material passes sequentially through at least two conveying chambers with decreasing volumes during the conveying process. Each conveying chamber applies partial pressurization to the material, ensuring that it is pressurized before being conveyed to the mixer. This reduces material slippage caused by excessive pressure difference in a high back pressure environment. Furthermore, the progressive compression maintains the continuity of material flow, reduces shear force concentration, and lowers the risk of damage to the dispersion system. Thus, while maintaining the integrity of the material dispersion system, material slippage is reduced, ensuring stable feeding. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the feeding device provided in the embodiments of this application;

[0026] Figure 2 for Figure 1 Schematic diagram of the feed pump structure;

[0027] Figure 3 for Figure 2 A schematic diagram of the conveyor assembly.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10-Mixer;

[0030] 100 - Storage component; 110 - Discharge port; 120 - Return port;

[0031] 200 - Feed pump; 201 - Conveying chamber;

[0032] 210 - Feed section; 211 - Feed inlet; 212 - Feed chamber; 213 - Screw rod;

[0033] 220 - Conveying section; 221 - Conveying assembly; 2211 - Stator; 2212 - Rotor;

[0034] 230 - Discharge section;

[0035] 300 - Discharge pipe; 310 - Nozzle; 320 - Back pressure valve;

[0036] 400 - Feed pipe; 410 - First inspection piece; 420 - Control valve; 430 - Second inspection piece;

[0037] 500 - Exhaust pipe;

[0038] 600-metering pump;

[0039] 700 - Return pipe.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0042] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Furthermore, it should be noted that in the description of this application, the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0045] As shown in the background art, in the prior art, the feeding system includes a closed buffer mixing tank and a single-stage screw pump. The closed buffer mixing tank is used to store and initially mix low-viscosity film fillers to prevent the low-viscosity film fillers from settling or stratifying. The single-stage screw pump is used to quantitatively deliver the low-viscosity film fillers into the mixer, and the low pressure in the single-stage screw pump can maintain the integrity of the dispersion system of the low-viscosity film fillers during the delivery process.

[0046] However, the high-pressure mixer creates a high back pressure environment at the outlet of the single-stage screw pump, causing the low-viscosity thin-film packing inside the single-stage screw pump to slip back, thus affecting the stability of the feed.

[0047] Based on this, the feeding device provided in this application includes a storage unit and a feeding pump. The storage unit is used to store materials. The feeding pump includes a feeding section, a conveying section, and a discharging section arranged sequentially. The discharging section is connected to a mixer, and the feeding section is connected to the storage unit for inputting materials. The conveying section has at least two conveying chambers arranged sequentially, with adjacent conveying chambers connected to each other. The feeding section is connected to the conveying chamber at the beginning, and the discharging section is connected to the conveying chamber at the end, to jointly convey the materials to the mixer. Along the material conveying direction, the volume of at least two conveying chambers decreases sequentially to gradually increase the pressure on the materials.

[0048] In this way, the material passes sequentially through at least two conveying chambers with decreasing volumes during the conveying process. Each conveying chamber applies partial pressurization to the material, ensuring that it is pressurized before being conveyed to the mixer. This reduces material slippage caused by excessive pressure difference in a high back pressure environment. Furthermore, the progressive compression maintains the continuity of material flow, reduces shear force concentration, and lowers the risk of damage to the dispersion system. Thus, while maintaining the integrity of the material dispersion system, material slippage is reduced, ensuring stable feeding.

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] Reference Figure 1 and Figure 2 As shown, the feeding device provided in this application includes a storage unit 100 and a feeding pump 200, wherein the storage unit 100 is used to store materials.

[0051] The feed pump 200 includes a feeding section 210, a conveying section 220 and a discharge section 230 arranged in sequence. The discharge section 230 is used to communicate with the mixer 10, and the feeding section 210 is used to communicate with the storage unit 100 for inputting materials.

[0052] The conveying section 220 has at least two conveying chambers 201 arranged in sequence, with the two adjacent conveying chambers 201 connected to each other. The feeding section 210 is connected to the conveying chamber 201 located at the beginning, and the discharging section 230 is connected to the conveying chamber 201 located at the end, so as to jointly convey the material to the mixer 10.

[0053] Along the material conveying direction, the volumes of at least two conveying chambers 201 decrease sequentially to gradually increase the pressure on the material.

[0054] It should be noted that the feeding device provided in this application embodiment can be used to transport low-viscosity film fillers, and can also be used to transport other low-viscosity materials. This application embodiment does not impose too many restrictions on this.

[0055] The storage unit 100 is a component used to store materials to be conveyed. Its function is to temporarily store the materials and continuously supply material to the feed pump 200. In specific implementation, the storage unit 100 can be a mirror-polished stainless steel tank, and an agitator can be installed inside the stainless steel tank to stir the materials and make them evenly mixed.

[0056] The feed pump 200 is a component used to pressurize and convey the material in the storage unit 100 to the mixer 10. Its function is to input the material through the feeding section 210, then sequentially convey it through multiple conveying chambers 201 in the conveying section 220 for step-by-step pressurization, and finally output it to the mixer 10 from the discharge section 230. In terms of position and relationship, the feed pump 200 can be arranged between the storage unit 100 and the mixer 10. The feeding section 210 is connected to the storage unit 100 to receive the material, and the discharge section 230 is connected to the mixer 10 to form a conveying path. The feed pump 200 as a whole serves as an intermediate conveying unit, forming a connection relationship with the upstream and downstream equipment.

[0057] The feeding section 210 is located at one end of the feed pump 200 near the storage unit 100. Its function is to introduce the material output from the storage unit 100 into the feed pump 200 and guide it to the conveying chamber 201 located at the head. For example, the feeding section 210 may be provided with a conical feed port 211 or a straight feed port 211 for receiving materials.

[0058] The conveying section 220 is used to grade and transfer materials and gradually increase their pressure. The conveying section 220 has at least two conveying chambers 201 arranged in sequence. The two adjacent conveying chambers 201 are connected to each other and arranged along the material conveying direction. The conveying chamber 201 at the beginning is connected to the feeding section 210, and the conveying chamber 201 at the end is connected to the discharging section 230, so that the material undergoes a progressive process from low pressure to high pressure in the conveying section 220.

[0059] The discharge section 230 is equipped with a feed pump 200 near one end of the mixer 10. Its function is to output the material that has been pressurized step by step by the conveying section 220 to the mixer 10. For example, the discharge section 230 may be provided with a straight discharge port 110 or a tapered discharge port 110 for discharging material.

[0060] It should be noted that the material is conveyed from the storage unit 100 to the feeding section 210 of the feed pump 200, and then sequentially enters at least two conveying chambers 201 of the conveying section 220 from the feeding section 210. Since the volume of the conveying chambers 201 decreases sequentially along the material conveying direction, the first conveying chamber 201 has a larger volume to smoothly receive the material, and the decreasing volume of the subsequent conveying chambers 201 gradually increases the pressure of the material during the step-by-step conveying process. Finally, the pressurized material is conveyed to the mixer 10 through the discharge section 230. Throughout the process, the material conveying pressure is shared by at least two conveying chambers 201. Step-by-step pressurization maintains the integrity of the material dispersion system. Furthermore, because the pressure gradient increases along the conveying direction, the material reaches its highest pressure in the last conveying chamber 201, thereby reducing slippage caused by a high back pressure environment.

[0061] In this way, the material passes sequentially through at least two conveying chambers 201 with decreasing volumes during the conveying process. Each conveying chamber 201 applies partial pressurization to the material, so that the pressurized material is conveyed to the mixer 10. This reduces material slippage caused by excessive pressure difference in the feed pump 200 under high back pressure conditions. Furthermore, the progressive compression maintains the continuity of material flow, reduces the concentration of shear force, and lowers the risk of damage to the dispersion system. Thus, while maintaining the integrity of the material dispersion system, material slippage is reduced, ensuring feeding stability.

[0062] In some embodiments, refer to Figure 2 and Figure 3 As shown, the conveying section 220 includes at least two conveying assemblies 221. Each conveying assembly 221 includes a stator 2211 and a rotor 2212 disposed within the stator 2211. A conveying cavity 201 is formed between the stator 2211 and the rotor 2212.

[0063] The conveying assembly 221 is a pumping unit used for volumetric conveying and synchronous pressurization of materials. It forms a variable-volume conveying chamber 201 between the stator 2211 and rotor 2212 through the relative movement of the two components, thereby achieving material capture, displacement, and compression. The conveying assembly 221 is located in the conveying section 220 of the feed pump 200, and the conveying section 220 includes at least two conveying assemblies 221. These at least two conveying assemblies 221 are arranged sequentially along the material conveying direction. The output end of the preceding conveying assembly 221 is connected to the input end of the following conveying assembly 221, allowing the material to be pressurized step-by-step within each conveying chamber 201 and stably fed into the discharge section 230.

[0064] In a specific implementation, the stator 2211 can be a fixedly installed housing or bushing component, and the rotor 2212 can be connected to an external power source via a drive shaft and rotate inside the stator 2211. The conveying cavity 201 formed between the two constitutes the space for receiving and conveying materials. In one possible embodiment, the stator 2211 can adopt a cylindrical sleeve, a spiral groove housing, or a composite lining structure, and the rotor 2212 can adopt a single-screw rotor 2212, a twin-screw rotor 2212, or a multi-bladed spiral rotor 2212. The material of the stator 2211 can be polytetrafluoroethylene, rubber, metal lining material, or engineering plastics, and the material of the rotor 2212 can be stainless steel, alloy steel, surface-hardened steel, or metal material with wear-resistant coating to adapt to the abrasiveness, corrosiveness, and pressure rating requirements of different materials.

[0065] It should be noted that the feed pump 200 forms multiple conveying chambers 201 through at least two conveying components 221 (stator 2211 and rotor 2212), and adjacent conveying chambers 201 are connected through the cooperation of stator 2211 and rotor 2212. The rotor 2212 rotates or reciprocates within the stator 2211, pushing the material sequentially through each conveying chamber 201. Since the volume of the conveying chamber 201 decreases along the conveying direction, the material is partially compressed in each conveying chamber 201 and finally conveyed to the mixer 10 through the discharge section 230.

[0066] In this way, the mechanical sealing and step-by-step pressurization functions of the conveying chamber 201 are realized through the cooperation of the stator 2211 and the rotor 2212, which enhances the pressure bearing capacity of the conveying chamber 201. At the same time, the rotation or reciprocating motion of the rotor 2212 provides a stable driving force, so that the material maintains a pressure gradient during the conveying process, ensuring stable material supply and the protection effect of the dispersion system.

[0067] In some embodiments, refer to Figure 3 As shown, the rotor 2212 employs a screw with a large lead, large tooth height, and a small helical inner diameter, while the stator 2211 is a double- or triple-ended helical sleeve that matches the rotor 2212. The geometry of the stator 2211 and rotor 2212 alternates between a circular cross-section (half the geometry) and an elliptical cross-section (two-thirds the geometry). By optimizing the radius of curvature and cross-sectional area distribution of the contact surfaces between the stator 2211 and rotor 2212, the gap between adjacent stators 2211 and rotor 2212 gradually decreases along the material conveying direction, thereby creating a dynamic sealing effect under high pressure.

[0068] In some embodiments, refer to Figure 2 As shown, the stators 2211 of at least two conveying assemblies 221 have the same volume, and the rotors 2212 of at least two conveying assemblies 221 increase in volume sequentially along the material conveying direction.

[0069] Alternatively, the rotors 2212 of at least two conveying assemblies 221 have the same volume, and the stators 2211 of at least two conveying assemblies 221 decrease in volume sequentially along the material conveying direction.

[0070] Understandably, the volume of the conveying cavity 201 can be reduced by adjusting the volume or volume parameters of the stator 2211 and the rotor 2212. For example, when the volume of the stator 2211 is the same while the volume of the rotor 2212 increases (refer to...). Figure 2 As shown in the figure, the rotor 2212 gradually compresses the material in the movement path within the stator 2211; or, when the rotor 2212 has the same volume while the volume of the stator 2211 decreases (not shown in the figure), the fitting gap between the stator 2211 and the rotor 2212 gradually decreases, thereby achieving step-by-step pressurization.

[0071] In this way, by adjusting the volume / volume parameters of at least two stators 2211 and rotor 2212, a step-by-step pressurization effect is achieved. Matching the geometric parameters of stators 2211 and rotor 2212 reduces the concentration of shear force on the material during the conveying process, while maintaining a stable pressure gradient through volume reduction ensures the stability of material supply.

[0072] In some embodiments, the stator 2211 has the same volume, while the volume of the rotor 2212 increases sequentially along the conveying direction. Since the volume of the stator 2211 is fixed, the increase in the volume of the rotor 2212 gradually widens the volume difference between adjacent conveying chambers 201, resulting in a higher compression ratio in subsequent conveying chambers 201 at the same rotational speed. This step-by-step increase in compression ratio increases the pressure of the material during conveying, while reducing shear force concentration caused by single-stage high pressure, thus lowering the risk of damage to the dispersed system.

[0073] In some embodiments, the stator 2211 and rotor 2212 of the conveying assembly 221 form a conveying chamber 201 through the meshing of helical teeth. When the rotor 2212 rotates within the stator 2211, adjacent conveying chambers 201 are connected through the interlacing of the helical grooves of the stator 2211 and the helical teeth of the rotor 2212, achieving continuous material feeding. The volume matching design of the stator 2211 and the rotor 2212 ensures that each conveying chamber 201 forms a periodically changing volume during rotation, thereby gradually compressing the material through mechanical sealing and achieving step-by-step pressurization.

[0074] In some embodiments, refer to Figure 2 As shown, the rotors 2212 of at least two conveying assemblies 221 rotate at the same speed.

[0075] In practical implementation, the rotors 2212 of multiple conveying components 221 can rotate synchronously at the same speed under the action of the same drive source or synchronous control mechanism, so that the conveying rhythm applied to the material by each level of conveying chamber 201 remains consistent. As the rotors 2212 continue to rotate, the material is pushed sequentially from the previous level conveying chamber 201 to the next level conveying chamber 201, and continuous pressurization is achieved under the constraint of the progressively decreasing volume of the conveying chambers 201 along the conveying direction. Since the rotors 2212 rotate at the same speed, there will be no obvious difference in the feeding speed between the front and rear stages, so the material is less likely to form pulsations, backflow, or local stagnation during the transition between stages. After the material is output to the discharge section 230 through the conveying chamber 201 located at the tail end, it can enter the mixer 10 under a relatively stable pressure state, thereby achieving continuous feeding under high back pressure conditions, so as to keep the conveying state of low viscosity materials uniform and stable.

[0076] In this way, the conveying component 221 pushes materials by rotating the rotor 2212. The rotors 2212 of at least two conveying components 221 rotate at the same speed, which can ensure that the feeding speed of at least two conveying chambers 201 is the same. This reduces the formation of pulsation, backflow or local stagnation of materials when transitioning between adjacent conveying chambers 201, and ensures that the materials flow continuously during the step-by-step pressurization process, thereby ensuring the stability of the feeding.

[0077] In some embodiments, refer to Figure 2 As shown, the feeding section 210 has a feeding port 211 and a feeding chamber 212 connected to the feeding port 211. The feeding port 211 is connected to the storage unit 100, and the feeding chamber 212 is connected to the conveying chamber 201 located at the head. The feeding port 211 is conical, and the flow area of ​​the feeding port 211 gradually decreases along the direction toward the feeding chamber 212.

[0078] In practical implementation, the material in the storage unit 100 can enter the conical feed inlet 211 under the action of gravity or upstream supply pressure. The material is gradually guided and converged in the gradually narrowing channel, and its flow cross-sectional area gradually decreases in the direction towards the feed chamber 212, so that the material completes a gentle contraction before entering the feed chamber 212, reducing the velocity gradient change at the inlet and the risk of gas entrapment. Subsequently, the material enters the feed chamber 212, and then is smoothly introduced into the conveying chamber 201 located at the head, so that the conveying chamber 201 located at the head can start to carry out the step-by-step conveying and pressurization of the material under relatively stable full conditions.

[0079] It should be noted that, due to the tapered conical structure of the feed inlet 211, the material undergoes preliminary rectification and pre-compression before entering the conveying section 220. This reduces backflow, impact, and local accumulation of low-viscosity materials at the inlet, minimizes pressure fluctuations caused by discontinuous feeding, and facilitates continuous and stable material transfer between adjacent conveying chambers 201. This ensures stable feeding under high back pressure conditions, improves the feeding consistency of the first conveying chamber 201, and enhances continuous feeding capacity, thus providing reliable front-end feeding conditions for the stable operation of the subsequent mixer 10.

[0080] In some embodiments, refer to Figure 2 As shown, a screw rod 213 is provided in the feed chamber 212, and the screw rod 213 is correspondingly provided with the feed port 211. The screw rod 213 is used to stir the material.

[0081] The screw rod 213 refers to a rotating rod used for stirring materials. Exemplarily, the screw rod 213 may be a conical screw rod 213 or a straight screw stirring rod, and the embodiments of this application do not impose too many limitations on this.

[0082] It should be noted that the screw rod 213 rotates in the feed chamber 212, which can fully mix the material through stirring and guide the material flow, reducing turbulence and dead zones in the feed section 210.

[0083] In this way, the mixing uniformity of the feeding section 210 is enhanced by the stirring action of the screw 213, the stratification or settling of materials in the feeding chamber 212 is reduced, and the mixing efficiency and dispersion protection effect of the feeding system are further improved.

[0084] In some embodiments, refer to Figure 1 and Figure 2 As shown, it also includes a discharge pipe 300, which is used to connect the discharge section 230 and the mixer 10. A nozzle 310 is provided at the end of the discharge pipe 300 away from the discharge section 230, which is used to convey the material to the mixer 10.

[0085] It should be noted that the feed pump 200 pressurizes the material from the storage unit 100 through the feeding section 210 and the conveying section 220 before sending it into the discharge section 230. Subsequently, the material enters the end nozzle 310 along the discharge pipe 300. Under the contraction and rectification action of the nozzle 310, a continuous and concentrated flow stream is formed and injected into the mixer 10 in a controlled state. Since the discharge pipe 300 provides a stable transitional conveying path for the material output from the discharge section 230, and the nozzle 310 performs end-point orientation and velocity integration of the fluid, it can reduce pressure fluctuations, slippage, and flow pulsation commonly seen under high back pressure conditions, ensuring the continuity of the feeding process.

[0086] This helps to achieve precise material feeding, ensure stable material supply, and improve the repeatability and consistency of subsequent mixing processes.

[0087] In some embodiments, refer to Figure 1 and Figure 2 As shown, a back pressure valve 320 is also provided on the discharge pipe 300. The back pressure valve 320 is located on the side of the nozzle 310 facing the discharge section 230.

[0088] It should be noted that the feed pump 200 continuously transports the material in the storage unit 100 to the discharge section 230, and then enters the back pressure valve 320 located at its front end through the discharge pipe 300. The back pressure valve 320 forms a controlled throttling effect on the fluid on the side of the nozzle 310 facing the discharge section 230, so that the material establishes and maintains a stable internal pressure before reaching the nozzle 310. As the operating status of the downstream high-speed mixer 10 changes, a high and fluctuating back pressure may form on the mixer 10 side. At this time, the back pressure valve 320 can compensate for the pressure difference by changing the valve core displacement or the valve opening, which not only inhibits the direct transmission of external back pressure to the feed pump 200, but also prevents the material from slipping or pulsating in the discharge pipe 300, thereby keeping the output state at the nozzle 310 continuous and uniform. Since the pressure at the front end of the nozzle 310 is stably controlled, the material can enter the mixer 10 with a more consistent flow rate and spray state, which makes it easier to control the feed amount and ratio, and reduces the feeding deviation caused by instantaneous pressure fluctuations.

[0089] This configuration ensures pressure stability and continuous material output under high back pressure conditions, enabling more precise feeding control and further ensuring the stability and reliability of the feeding process.

[0090] In some embodiments, refer to Figure 1 and Figure 2 As shown, it also includes a controller and a feed pipe 400, which connects the storage unit 100 and the feed section 210. The feed pipe 400 is equipped with a first detection element 410 and a regulating valve 420. The first detection element 410 is used to detect the flow rate of the material in the feed pipe 400.

[0091] Both the first detection element 410 and the regulating valve 420 are connected to the controller. When the flow rate is greater than the preset flow rate, the controller controls the regulating valve 420 to reduce the flow rate, and when the flow rate is less than the preset flow rate, the controller controls the regulating valve 420 to increase the flow rate.

[0092] In one possible embodiment, the first detection element 410 may be any one of a flow meter, a mass flow sensor, a turbine flow meter, or an electromagnetic flow meter; the controller may be any one of a PLC (Programmable Logic Controller), an industrial computer, an embedded control module, or a distributed control system; and the regulating valve 420 may be any one of a ball valve, a butterfly valve, a needle valve, a proportional valve, a solenoid valve, a pneumatic valve, or a servo valve.

[0093] For example, both the discharge pipe 300 and the inlet pipe 400 can be made of corrosion-resistant, transparent, and observable polytetrafluoroethylene (PTFE) hoses, or other pipe materials can be used. This application does not impose too many restrictions on this.

[0094] In a specific implementation, the first detection element 410 can be arranged in the middle section of the feed pipe 400 or on one side near the storage element 100 so as to obtain the incoming material status as early as possible. The regulating valve 420 can be set downstream or upstream of the first detection element 410, preferably close to the inlet of the feed section 210, so as to shorten the control response path and improve the timeliness of regulation.

[0095] To ensure measurement accuracy, the range of the first detection element 410 should cover the preset flow range corresponding to the normal operation of the feed pump 200, and the diameter of the regulating valve 420 should be matched with the inner diameter of the feed pipe 400. A linear or nonlinear correspondence can be pre-established between the valve core opening and the flow rate change so that the controller can perform graded adjustment or continuous adjustment according to the flow rate deviation.

[0096] Specifically, the material in the storage unit 100 enters the detection range of the first detection element 410 through the feed pipe 400. The first detection element 410 continuously collects the current flow rate and transmits the signal to the controller. The controller compares the actual flow rate with the preset flow rate and outputs a valve adjustment command, causing the regulating valve 420 to reduce or increase its opening as needed. This corrects the flow rate in the feed pipe 400 in real time, ensuring that the material flow rate entering the feed section 210 of the feed pump 200 remains within the set range. Because the feed pump 200 is sensitive to the stability of the inlet feed under high back pressure conditions, excessive fluctuations in the inlet flow rate can easily cause uneven filling, pressure fluctuations, and instantaneous slippage within the pump. Through the aforementioned closed-loop control, the feed pump 200 can continuously obtain a relatively constant material supply, making the suction state of the feed pump 200 and the subsequent step-by-step pressurization process more stable. This results in a more uniform output flow rate, reducing problems such as inaccurate proportioning and unstable dispersion caused by feed fluctuations. This improves the continuity of material supply, the accuracy of metering, and the repeatability of the process, thereby providing a stable material base for subsequent mixing and film-forming processes.

[0097] In some embodiments, refer to Figure 1 and Figure 2 As shown, it also includes an exhaust pipe 500, which is connected to the feed pipe 400. The feed pipe 400 is also provided with a second detection element 430, which is located on the side of the regulating valve 420 facing the feed section 210. The second detection element 430 is used to detect the pressure inside the feed pipe 400. The exhaust pipe 500 is used to discharge some air bubbles inside the feed pipe 400 when the pressure is less than the preset pressure.

[0098] It should be noted that the material in the storage unit 100 is conveyed to the feeding section 210 of the feeding pump 200 through the feeding pipe 400. The first detection element 410 in the feeding pipe 400 continuously detects the flow rate and adjusts the feeding amount to the preset range with the cooperation of the regulating valve 420. At the same time, the second detection element 430 synchronously monitors the pressure status downstream of the regulating valve 420 and near the feeding section 210. In the initial stage of conveying or when air or dissolved gas is contained in the material, the local pressure of the feeding pipe 400 may be lower than the preset pressure. The bubbles will gradually accumulate in the low pressure area and move towards the upper part of the pipeline. At this time, when the pressure conditions are met, the exhaust pipe 500 connects to the external exhaust channel to discharge some of the bubbles in the feeding pipe 400, thereby preventing the bubbles from entering the feeding pump 200 with the material and affecting the continuity of the material.

[0099] Because air bubbles are promptly removed, the material entering the feed section 210 maintains a relatively stable volume fraction and a more consistent instantaneous flow pattern, thereby reducing flow pulsations caused by bubble compression and release, as well as local concentration deviations caused by gas phase entrainment. This reduces feed fluctuations caused by air entrainment, lowers the probability of mixing ratio deviations, and helps maintain the stability of continuous feeding and batching accuracy.

[0100] For example, the exhaust pipe 500 may be a U-shaped pipe or other shaped pipe fittings, and the embodiments of this application do not impose too many restrictions on this.

[0101] In some embodiments, refer to Figure 1 and Figure 2 As shown, it also includes a metering pump 600 and a return pipe 700. The storage unit 100 has a discharge port 110 and a return port 120. The metering pump 600 is connected to the discharge port 110 and the feed pipe 400. The return pipe 700 is connected to the feed pipe 400 and the return port 120. The return pipe 700 is configured to transport a portion of the material output from the discharge port 110 to the feed pipe 400 when the metering pump 600 delivers the material to the discharge port 110.

[0102] For example, the metering pump 600 can be a plunger metering pump 600, a pump body that realizes material conveying through the reciprocating motion of the plunger, and has a precise metering function. In some embodiments, the outlet 110 of the storage unit 100 is connected to the feed pipe 400 through the metering pump 600, and the metering pump 600 adopts a 2 / 3 reflux and 1 / 3 straight supply mode. Specifically, the material in the storage unit 100 is stably drawn out from the outlet 110 under the action of the metering pump 600 and sent to the feed section 210 of the subsequent feed pump 200 through the feed pipe 400. At the same time, the reflux pipe 700 divides 2 / 3 of the material from the feed pipe 400 and guides it back to the return port 120 of the storage unit 100, so that a new circulating flow is continuously formed inside the storage unit 100.

[0103] Specifically, the material in the storage unit 100 is stably extracted from the outlet 110 by the metering pump 600 and sent to the feed section 210 of the subsequent feed pump 200 via the feed pipe 400 connected to it. At the same time, the return pipe 700 separates a portion of the material from the feed pipe 400 and guides it back to the return port 120 of the storage unit 100, so that a new circulating flow is continuously formed inside the storage unit 100. Since the material is not entirely transported downstream after entering the feed pipe 400, but there is a return component that returns to the storage unit 100 according to a preset ratio, a certain amount of disturbance and mixing is always maintained inside the storage unit 100, so that the material is not easy to settle at the bottom or precipitate at the top, and is not easy to have local concentration differences due to long-term standing. In this way, while ensuring a stable supply of material to the subsequent feed pump 200, the material in the storage unit 100 and the feed pipe 400 is kept evenly distributed, thereby reducing concentration deviation and improving the stability of continuous feeding, consistency of batching and process repeatability under high back pressure conditions.

[0104] Those skilled in the art will understand that the feeding device provided in this application, by setting up a storage unit 100 and a feeding pump 200, uses the storage unit 100 to store materials. The feeding pump 200 includes a feeding section 210, a conveying section 220, and a discharging section 230 arranged sequentially. The discharging section 230 is used to communicate with the mixer 10, and the feeding section 210 is connected to the storage unit 100 for inputting materials. The conveying section 220 has at least two conveying chambers 201 arranged sequentially, with adjacent conveying chambers 201 communicating with each other. The feeding section 210 communicates with the conveying chamber 201 located at the beginning, and the discharging section 230 communicates with the conveying chamber 201 located at the end, so as to jointly convey the materials to the mixer 10. Along the material conveying direction, the volume of at least two conveying chambers 201 decreases sequentially to gradually increase the pressure of the materials.

[0105] In this way, the material passes sequentially through at least two conveying chambers 201 with decreasing volumes during the conveying process. Each conveying chamber 201 applies partial pressurization to the material, so that the pressurized material is conveyed to the mixer 10. This reduces material slippage caused by excessive pressure difference in the feed pump 200 under high back pressure conditions. Furthermore, the progressive compression maintains the continuity of material flow, reduces the concentration of shear force, and lowers the risk of damage to the dispersion system. Thus, while maintaining the integrity of the material dispersion system, material slippage is reduced, ensuring feeding stability.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0107] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0108] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A supply device, characterized in that include: Storage unit (100), the storage unit (100) is used to store materials; The feed pump (200) includes a feeding section (210), a conveying section (220) and a discharge section (230) arranged in sequence. The discharge section (230) is used to communicate with the mixer (10), and the feeding section (210) is connected to the storage unit (100) for inputting the material. The conveying section (220) has at least two conveying chambers (201) arranged in sequence. The two adjacent conveying chambers (201) are connected to each other. The feeding section (210) is connected to the conveying chamber (201) located at the beginning, and the discharging section (230) is connected to the conveying chamber (201) located at the end, so as to jointly convey the material to the mixer (10). Along the conveying direction of the material, the volumes of at least two of the conveying chambers (201) decrease sequentially to gradually increase the pressure of the material.

2. The feeder device according to claim 1, characterized in that The conveying section (220) includes at least two conveying assemblies (221), each conveying assembly (221) including a stator (2211) and a rotor (2212) disposed within the stator (2211), wherein the conveying cavity (201) is formed between the stator (2211) and the rotor (2212).

3. The feeder of claim 2, wherein The stators (2211) of at least two of the conveying assemblies (221) have the same volume, and the rotors (2212) of at least two of the conveying assemblies (221) increase in volume sequentially along the conveying direction of the material. Alternatively, the rotors (2212) of at least two of the conveying assemblies (221) have the same volume, and the stators (2211) of at least two of the conveying assemblies (221) decrease in volume sequentially along the conveying direction of the material.

4. The feeder of claim 2, wherein The rotors (2212) of at least two of the conveying assemblies (221) rotate at the same speed.

5. The feeder of claim 1, wherein The feeding section (210) has a feeding port (211) and a feeding chamber (212) communicating with the feeding port (211). The feeding port (211) is communicating with the storage device (100), and the feeding chamber (212) is communicating with the conveying chamber (201) located at the head. The feed inlet (211) is conical, and the flow area of ​​the feed inlet (211) gradually decreases along the direction toward the feed chamber (212).

6. The feeder of claim 5, wherein A screw rod (213) is provided in the feed chamber (212), and the screw rod (213) is correspondingly provided with the feed inlet (211). The screw rod (213) is used to stir the material.

7. The feeder device according to any one of claims 1 to 6, characterized in that It also includes a discharge pipe (300), which is used to connect the discharge section (230) and the mixer (10). A nozzle (310) is provided at one end of the discharge pipe (300) away from the discharge section (230), and the nozzle (310) is used to convey the material to the mixer (10).

8. The feeder of claim 7, wherein A back pressure valve (320) is also provided on the discharge pipe (300), and the back pressure valve (320) is located on the side of the nozzle (310) facing the discharge section (230).

9. The feeder device according to any one of claims 1 to 6, characterized in that It also includes a controller and a feed pipe (400) that connects the storage unit (100) and the feed section (210). The feed pipe (400) is provided with a first detection element (410) and a regulating valve (420). The first detection element (410) is used to detect the flow rate of the material in the feed pipe (400). The first detection element (410) and the regulating valve (420) are both connected to the controller. When the flow rate is greater than the preset flow rate, the controller controls the regulating valve (420) to reduce the flow rate, and when the flow rate is less than the preset flow rate, the controller controls the regulating valve (420) to increase the flow rate.

10. The apparatus of claim 9, wherein, It also includes an exhaust pipe (500) connected to the feed pipe (400), and the feed pipe (400) is also provided with a second detection element (430). The second detection element (430) is located on the side of the regulating valve (420) facing the feed section (210). The second detection element (430) is used to detect the pressure inside the feed pipe (400). The exhaust pipe (500) is used to discharge some air bubbles inside the feed pipe (400) when the pressure is less than the preset pressure. And / or, also includes a metering pump (600) and a return pipe (700), the storage unit (100) having a discharge port (110) and a return port (120), the metering pump (600) connecting the discharge port (110) to the feed pipe (400), the return pipe (700) connecting the feed pipe (400) to the return port (120), the return pipe (700) being configured to deliver a portion of the material output from the discharge port (110) to the feed pipe (400) when the metering pump (600) delivers the material to the discharge port (110) to the feed pipe (400).

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