Batching and feeding device

Abstract

The invention discloses a batching and feeding device which comprises a material storage module, a feeding module, a feeding module and a control module, the material storage module comprises a plurality of material storage units, and each material storage unit comprises a material storage tank and a conveying assembly; the material preparation module comprises a plurality of material preparation units, each material preparation unit comprises a material preparation tank and a first three-way ball valve, the material storage tank is communicated with the bottom end of the material preparation tank through a conveying assembly, and the bottom ends of every two connected material preparation tanks are communicated through the corresponding first three-way ball valve; the dropwise adding module is communicated with the material preparation module and comprises a plurality of dropwise adding units, each dropwise adding unit comprises a plurality of dropwise adding tanks and a second three-way ball valve, and the feeding ends of every two adjacent dropwise adding tanks are communicated through the corresponding second three-way ball valve. Raw material fluid enters the material preparation tank from the bottom end of the material preparation tank through the conveying assembly, impact on the material preparation tank is reduced, errors caused by signal lag of a load sensor are avoided, in addition, through cooperation of a first three-way ball valve and a second three-way ball valve, the number of pipelines and valve bodies is reduced, signal delay between the valve bodies is reduced, errors are further avoided, and the service life of the material preparation tank is prolonged. The production stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a batching and feeding device. Background Art

[0002] The addition polymerization process of acrylic resin used in the production of coatings or glues in the fine chemical industry is characterized by non-continuous and multi-batch production. According to the application field, a variety of acrylic esters and styrene raw materials are mixed in different proportions, and then added to the dropping tank. The solvent in the reactor is heated to the temperature required by the process, and then the raw materials in the dropping tank are added to the reactor to generate an addition polymerization reaction to generate acrylic resin polymers. The traditional feeding and mixing device requires a large number of pipes and valves, and there is a delay in the control between multiple valves. When the fluid is transported, it is easy for the load sensor signal to lag due to fluid impact, which makes it easy to exceed the allowable error range when mixing the raw materials. When the excess amount of the mixed material exceeds the error range, the existing feeding device cannot correct it, affecting production stability. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a batching and feeding device that can reduce the number of pipes and valves, reduce the risk of out-of-range errors, and can correct out-of-range errors when they occur.

[0004] The batching and feeding device according to the first aspect of the present invention includes: a material storage module, including a plurality of material storage units, the material storage unit including a material storage tank and a conveying assembly, the conveying assembly is used to deliver the raw materials in the material storage tank; a material preparation module, including a plurality of material preparation units, the material preparation unit including a material preparation tank and a first three-way ball valve, the material preparation tank corresponds to the material storage tank one by one, the material storage tank is connected with the bottom end of the material preparation tank through the conveying assembly, and the bottom ends of two connected material preparation tanks are connected through the first three-way ball valve; a dripping module, connected with the material preparation module, including a plurality of dripping units, the dripping unit including a plurality of dripping tanks and a second three-way ball valve, and the feeding ends of two adjacent dripping tanks are connected through the second three-way ball valve.

[0005] The batching and feeding device according to the embodiment of the present invention has at least the following beneficial effects: various raw materials are added into various storage tanks respectively, and then are transported to the corresponding preparation tanks through the conveying components respectively, and the raw material fluid enters the preparation tank from the bottom of the preparation tank, thereby reducing the impact on the preparation tank, avoiding the signal lag of the load sensor, avoiding the batching error caused by the lag, and returning the excess raw materials to the storage tank. In addition, through the cooperation of the first three-way ball valve and the second three-way ball valve, the number of pipelines and valve bodies is reduced, the signal delay between the valve bodies is reduced, the error is further avoided, and the production stability is improved.

[0006] According to some embodiments of the present invention, the conveying assembly includes a centrifugal pump and a check valve, the storage tank is provided with a first material port, the feed end of the centrifugal pump is connected to the first material port, and the discharge end of the centrifugal pump is connected to the bottom end of the preparation tank through the check valve.

[0007] According to some embodiments of the present invention, a first regulating ball valve is provided between the discharge end of the centrifugal pump and the bottom end of the preparation tank.

[0008] According to some embodiments of the present invention, the storage tank is provided with a second material port, the second material port is provided with a second regulating ball valve, and the second material port is connected to the discharge end of the centrifugal pump through the second regulating ball valve.

[0009] According to some embodiments of the present invention, the material preparation unit further includes a first load sensor, which is used to measure the weight of the material preparation tank, and the first load sensor is electrically connected to the conveying assembly.

[0010] According to some embodiments of the present invention, the dripping unit also includes a second load sensor, which is used to measure the weight of the dripping tank. A third regulating ball valve is provided at the discharge end of the dripping tank, and the second load sensor is electrically connected to the third regulating ball valve.

[0011] According to some embodiments of the present invention, a first diaphragm pump is provided between the material preparation module and the dripping module, and the material preparation module is connected to the dripping module through the first diaphragm pump.

[0012] According to some embodiments of the present invention, the material preparation module also includes a small material preparation tank and a material preparation component, a second diaphragm pump is arranged between the material preparation component and the small material preparation tank, the material preparation component transports the raw materials to the small material preparation tank through the second diaphragm pump, and a third three-way ball valve is arranged at the discharge end of the small material preparation tank, and the small material preparation tank is connected to the discharge end of the material preparation module through the third three-way ball valve.

[0013] According to some embodiments of the present invention, the material preparation component includes a small material storage tank, and the second diaphragm pump is used to deliver the raw materials in the small material storage tank to the small material preparation tank.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic diagram of a batching and feeding device according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a straight-through state of a plurality of first three-way ball valves in a batching and feeding device according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the connection state between the first three-way ball valve and the material preparation tank in the batching and feeding device according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the connection state between the second three-way ball valve and the dripping tank in the batching and feeding device according to an embodiment of the present invention.

[0016] Description of reference numerals: A material storage tank 110, a first material port 111, a second material port 112, a centrifugal pump 121, a check valve 122, and a second regulating ball valve 123; The material preparation tank 210 , the first load sensor 211 , the first regulating ball valve 212 , the first three-way ball valve 213 , the switch valve 214 , and the first diaphragm pump 220 .

[0017] Small material storage tank 231, fourth regulating ball valve 232, second diaphragm pump 233, fifth regulating ball valve 234, small material preparation tank 235, third three-way ball valve 236, third load sensor 237; A dripping tank 320, a second three-way ball valve 310, a second load sensor 321, and a third regulating ball valve 322; Reactor 400. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] Reference Figure 1 The batching and feeding device of the first embodiment of the present invention includes: a material storage module, including a plurality of material storage units, the material storage unit includes a material storage tank 110 and a conveying component, and the conveying component is used to deliver the raw materials in the material storage tank 110; a material preparation module, including a plurality of material preparation units, the material preparation unit includes a material preparation tank 210 and a first three-way ball valve 213, the material preparation tank 210 corresponds to the material storage tank 110 one by one, the material storage tank 110 is connected to the bottom end of the material preparation tank 210 through the conveying component, and the bottom ends of the two connected material preparation tanks 210 are connected through the first three-way ball valve 213; a dripping module, which is connected to the material preparation module, includes a plurality of dripping units, the dripping units include a plurality of dripping tanks 320 and a second three-way ball valve 310, and the feeding ends of two adjacent dripping tanks 320 are connected through the second three-way ball valve 310.

[0023] Various raw materials are added to each storage tank 110 respectively, and then transported to the corresponding preparation tank 210 through the conveying components respectively. The raw material fluid in each storage tank 110 enters the corresponding preparation tank 210 from the bottom end of the preparation tank 210. The raw material fluid enters the preparation tank 210 from the lower end, which can reduce the impact of the raw material fluid on the preparation tank 210, avoid the detection fluctuation of the load sensor 211, avoid the signal lag of the load sensor 211, and reduce the batching error caused by the lag; in addition, the raw materials are firstly The set quantity is first delivered to the preparation tank 210 for weighing to avoid being directly delivered to the drip tank 320. If the delivered quantity is too much, the excess can be returned to the storage tank 110 by siphoning, so as to correct the error. In addition, through the combination of the first three-way ball valve 213 and the second three-way ball valve 310, the raw materials in each preparation tank 210 can be delivered to the corresponding drip tank 320 separately, reducing the number of pipelines and valve bodies, avoiding signal delays between valve bodies, facilitating the control of feeding errors, and improving production stability.

[0024] It is understandable that, referring to Figure 2 and Figure 3 The first three-way ball valve 213 is a pneumatic T-type three-way ball valve. Multiple first three-way ball valves 213 can be switched to a straight-through state and disconnected from their respective preparation tanks 210 at the same time. The pipelines between the multiple first three-way ball valves 213 are connected in series to form a straight-through pipeline. When one of the first three-way ball valves 213 is switched to a connected state, the preparation tank 210 connected to the opened first three-way ball valve 213 sends the material to the dripping tank 320 along the straight-through pipeline, and the remaining preparation tanks 210 maintain a straight-through state. In this way, each preparation tank 210 can send the raw materials to the dripping tank 320 for mixing, thereby reducing the number of pipelines and realizing separate feeding, which is simple and practical. After each preparation tank 210 is disconnected from the straight-through pipeline, the switch valve 214 is opened and an inert gas, such as nitrogen, is introduced into the straight-through pipeline to purge the remaining material in the pipe into the dripping tank 320. Since there is no dead angle in the pipe, the remaining material in the pipe can be purged clean to ensure accurate measurement.

[0025] It is also understandable that, with reference to Figure 1 and Figure 4 The second three-way ball valve 310 is a pneumatic T-type three-way ball valve. Multiple second three-way ball valves 310 can be switched to a straight-through state and disconnected from their respective drip tanks 320 at the same time. The pipelines between the multiple second three-way ball valves 310 are connected in series to form a straight-through pipeline. One of the second three-way ball valves 310 is switched to a connected state connected to the corresponding drip tank 320, and the remaining second three-way ball valves 310 remain straight-through, so that the raw materials can be added to the corresponding drip tanks 320 separately.

[0026] It is understandable that, referring to Figure 1 The conveying component includes a centrifugal pump 121 and a check valve 122. The storage tank 110 is provided with a first material port 111. The feed end of the centrifugal pump 121 is connected to the first material port 111. The discharge end of the centrifugal pump 121 is connected to the preparation tank 210 through the check valve 122.

[0027] It is understandable that, referring to Figure 1 A first regulating ball valve 212 is provided between the discharge end of the centrifugal pump 121 and the bottom end of the preparation tank 210. By providing the first regulating ball valve 212, the flow rate in the later stage of the raw material delivery process is adjusted to meet the requirements of accurate measurement. At the same time, when the flow rate is reduced by providing the first regulating ball valve 212, the opening of the second regulating ball valve 123 is increased proportionally to reduce the flow rate at the feed of the first regulating ball valve 212, thereby meeting the requirements of safe production, facilitating the control of the flow rate, and improving the accuracy of flow delivery.

[0028] Further, see Figure 1The storage tank 110 is provided with a second material port 112, which is located in the isohype area where the phase difference of the first material port 111 is 120°-180°. The second material port 112 is provided with a second regulating ball valve 123, and the second material port 112 is connected to the discharge end of the centrifugal pump 121 through the second regulating ball valve 123. When the centrifugal pump 121 transports raw materials, the second material port 112 is connected to the discharge end of the centrifugal pump 121 by opening the second regulating ball valve 123, and part of the raw materials are returned through the second material port 112, and the first regulating ball valve 212 is used to reduce the flow rate, so that the raw material delivery process is slowed down in the later stage, which is convenient for controlling the precise measurement of the raw materials. At the same time, the flow rate of the raw materials at the entrance of 212 is controlled to meet the safety production requirements. In addition, by opening the second material port 112, the centrifugal pump 121 simultaneously meets the function of returning the raw materials to the storage tank 110 through the second material port 112 to play a stirring role, so as to realize the circulation and heat preservation of the raw materials in the storage tank 110.

[0029] It is understandable that, referring to Figure 1 The material preparation unit also includes a first load sensor 211, which is used to measure the weight of the raw materials in the material preparation tank 210, and the first load sensor 211 is electrically connected to the conveying assembly. The weight of the raw materials in the material preparation tank 210 is measured by the first load sensor 211. When the first load sensor 211 detects that the raw materials in the material preparation tank 210 reach the set weight, the first regulating ball valve 212 is closed to achieve automatic control of feeding, improve automation, and reduce labor costs. In addition, it can also be set that when the weight measurement process of the raw materials in the material preparation tank 210 reaches the set range in the later stage, the first regulating ball valve 212 reduces the flow rate, which is convenient for accurate control of the weight of the raw materials sent to the material preparation tank 210, and further reduces the feeding error.

[0030] It is also understandable that, with reference to Figure 1 The dripping unit further includes a second load sensor 321, which is used to verify the weight of the raw material delivered from the preparation tank 210 to the dripping tank 320. The discharge end of the dripping tank 320 is provided with a third regulating ball valve 322 connected to the reactor 400, and the second load sensor 321 is electrically connected to the third regulating ball valve 322. The second load sensor 321 detects and verifies the weight of the raw material in the dripping tank 320. When the weight of the raw material in the dripping tank 320 is within the set range, the second load sensor 321 verifies the raw material from the preparation tank 210 and verifies it with the raw material output by the first load sensor 211, ensuring that the raw material metering process undergoes two processes of metering and verification.

[0031] It is understandable that, referring to Figure 1A first diaphragm pump 220 is provided between the material preparation module and the dripping module, and the material preparation module is connected to the dripping module through the first diaphragm pump 220. At the same time, a switch valve 214 is provided. The first diaphragm pump 220 and nitrogen purge ensure the automatic control of the precise delivery of raw materials between the material preparation module and the dripping module.

[0032] It is understandable that, referring to Figure 1 The material preparation module also includes a small material storage tank 231, a small material preparation tank 235 and a material preparation component. A second diaphragm pump 233 and a fourth regulating ball valve 232 are arranged between the material preparation component and the small material preparation tank 235. The material preparation component transports the raw materials of the small material storage tank 231 to the small material preparation tank 235 through the second diaphragm pump 233. A third three-way ball valve 236 is arranged at the discharge end of the small material preparation tank 235. The small material preparation tank 235 is also provided with a third load sensor 237. The third load sensor 237 is used for connecting the third three-way ball valve 236 in series with the straight-through pipe. The small material preparation tank 235 is connected to the discharge end of the material preparation module through the third three-way ball valve 236. The raw materials of the small material storage tank 231 are delivered to the small material preparation tank 235 through the second diaphragm pump 233. In the later stage of the conveying process, the fifth regulating ball valve 234 is reduced and the fourth regulating ball valve 232 is opened to reduce the flow of the diaphragm pump 233 to the small material preparation tank 235 to improve the metering accuracy. When over-quantity occurs during the conveying process, the excess raw materials are returned to the small material storage tank 231 through the fifth regulating ball valve 234 and the fourth regulating ball valve 232 to ensure accurate metering. The small material storage tank 231 and the small material preparation tank 235 are generally used for raw materials with small demand. Therefore, the small material storage tank 231 and the small material preparation tank 235 are usually selected from the small material preparation tank 235 with a smaller volume.

[0033] It is understandable that, referring to Figure 1 The material preparation component includes a small material storage tank 231, and the second diaphragm pump 233 is used to send the raw materials in the small material storage tank 231 to the small material preparation tank 235.

[0034] It is understandable that, referring to Figure 1 In addition, a fifth regulating ball valve 234 is provided between the second diaphragm pump 233 and the small material preparation tank 235. The fifth regulating ball valve 234 cooperates with the fourth regulating ball valve 232 to further improve the accuracy of flow control.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The batching and feeding device is characterized in that: include: A material storage module, comprising a plurality of material storage units, wherein the material storage units comprise a material storage tank and a conveying assembly, wherein the conveying assembly is used to deliver the raw materials in the material storage tank; A material preparation module, comprising a plurality of material preparation units, wherein the material preparation unit comprises a material preparation tank and a first three-way ball valve, wherein the material preparation tank corresponds to the material storage tank one by one, the material storage tank is connected to the bottom end of the material preparation tank through the conveying assembly, and the bottom ends of two connected material preparation tanks are connected through the first three-way ball valve; The dripping module is connected with the material preparation module and includes a plurality of dripping units. The dripping units include a plurality of dripping tanks and a second three-way ball valve. The feed ends of two adjacent dripping tanks are connected through the second three-way ball valve.

2. The batching and feeding device according to claim 1, characterized in that: The conveying assembly includes a centrifugal pump and a check valve. The storage tank is provided with a first material port. The feed end of the centrifugal pump is connected to the first material port. The discharge end of the centrifugal pump is connected to the bottom end of the preparation tank through the check valve.

3. The batching and feeding device according to claim 2, characterized in that: A first regulating ball valve is arranged between the discharge end of the centrifugal pump and the bottom end of the material preparation tank.

4. The batching and feeding device according to claim 3, characterized in that: The storage tank is provided with a second material port, the second material port is provided with a second regulating ball valve, and the second material port is connected to the discharge end of the centrifugal pump through the second regulating ball valve.

5. The batching and feeding device according to claim 1, characterized in that: The material preparation unit also includes a first load sensor, which is used to measure the weight of the material preparation tank, and the first load sensor is electrically connected to the conveying component.

6. The batching and feeding device according to claim 1, characterized in that: The dropping unit also includes a second load sensor, which is used to measure the weight of the dropping tank. A third regulating ball valve is provided at the discharge end of the dropping tank, and the second load sensor is electrically connected to the third regulating ball valve.

7. The batching and feeding device according to claim 1, characterized in that: A first diaphragm pump is provided between the material preparation module and the dripping module, and the material preparation module is connected with the dripping module through the first diaphragm pump.

8. The batching and feeding device according to claim 1, characterized in that: The material preparation module also includes a small material preparation tank and a material preparation component. A second diaphragm pump is arranged between the material preparation component and the small material preparation tank. The material preparation component transports the raw materials to the small material preparation tank through the second diaphragm pump. A third three-way ball valve is arranged at the discharge end of the small material preparation tank. The small material preparation tank is connected to the discharge end of the material preparation module through the third three-way ball valve.

9. The batching and feeding device according to claim 8, characterized in that: The material preparation component includes a small material storage tank, and the second diaphragm pump is used to send the raw materials in the small material storage tank to the small material preparation tank.

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