An automatic feeding control system for polycarboxylate superplasticizer

Abstract

This utility model discloses an automatic feeding control system for polycarboxylate superplasticizer, including a liquid feeding mechanism, a powder feeding mechanism, an additive feeding mechanism, a mixing reaction vessel, and a control unit. The liquid feeding mechanism includes a mother liquor container, a water container, and a first fluid conveying device; the powder feeding mechanism includes a powder container and a second fluid conveying device; the additive feeding mechanism includes an additive container and a third fluid conveying device. A flow acquisition unit is installed between each fluid conveying device and the mixing reaction vessel, and a weighing unit is provided on the mixing reaction vessel. By setting up flow acquisition units and weighing units respectively, the control unit automatically starts and stops each fluid conveying device based on the received acquisition information to ensure the feeding accuracy of the system.

Description

Technical Field

[0001] This utility model relates to the field of polycarboxylate superplasticizer preparation technology, specifically to an automatic feeding control system for polycarboxylate superplasticizer. Background Technology

[0002] Water-reducing agents are cement dispersants used in cement concrete. They can reduce the amount of water used in concrete construction, lower the water-cement ratio, increase the strength of concrete, shorten the curing period of concrete, ensure the progress of construction projects, and give concrete long-term durability and corrosion resistance. Therefore, they are widely used in projects such as highways, bridges, dams, tunnels, and high-rise buildings.

[0003] Polycarboxylate superplasticizers are commonly used high-efficiency superplasticizers. They are prepared by diluting polycarboxylate mother liquor according to performance requirements, dosage, setting time, etc., and then adding certain additives and mixing evenly to form a ready-to-use polycarboxylate superplasticizer. Currently, the compounding of commercially available polycarboxylate superplasticizers usually requires manual proportioning, resulting in high labor intensity, low production efficiency, and large measurement errors due to manual feeding, making it difficult to guarantee the effectiveness of the superplasticizer. Furthermore, the need for manual weighing and feeding leads to significant dust pollution and poses certain safety hazards. Utility Model Content

[0004] The purpose of this utility model is to solve, at least to a certain extent, one of the technical problems in the related art. In view of this, an automatic feeding control system for polycarboxylate superplasticizer is provided, including: a liquid feeding mechanism, a powder feeding mechanism, an additive feeding mechanism, a mixing reaction vessel and a control unit.

[0005] The liquid feeding mechanism includes a mother liquor container and a water container, which are respectively connected to the mixing reaction vessel via a first fluid conveying device;

[0006] The powder feeding mechanism includes a powder container connected to the mixing reaction vessel via a second fluid conveying device;

[0007] The additive feeding mechanism includes at least one additive container connected to the mixing reaction vessel via a third fluid conveying device;

[0008] Each fluid delivery device is equipped with a flow acquisition unit between itself and the mixing reaction vessel. The mixing reaction vessel is equipped with a weighing unit. Each fluid delivery device, flow acquisition unit, and weighing unit is electrically connected to the control unit. The control unit controls the working status of each fluid delivery device based on the flow information acquired by the flow acquisition unit and the weight information acquired by the weighing unit.

[0009] Compared with the prior art, the technical solution of this utility model has the following advantages: by setting flow acquisition units and weighing units between each fluid conveying device and the mixing reaction vessel and on the mixing reaction vessel respectively, the control unit realizes automatic adjustment of each fluid conveying device according to the received acquisition information, so as to ensure the feeding accuracy of the system, reduce labor intensity, improve production efficiency, and ensure the uniformity of water-reducing agent compounding. At the same time, the compounding process is carried out in a closed container, so safety hazards can be reduced to a certain extent.

[0010] According to one example of the present invention, the auxiliary agent container is provided with multiple containers, namely an air-entraining agent tank, an antifoaming agent tank, a water-retaining agent tank, and a TN tank.

[0011] According to an example of the present invention, the liquid feeding mechanism further includes a first conveying pipe and a first discharging pipe. The outlets of the mother liquor container and the water container are respectively connected to a first fluid conveying device through the first conveying pipe. Each of the first fluid conveying devices is respectively connected to a mixing reaction container through the first discharging pipe.

[0012] The powder feeding mechanism further includes a second conveying pipe and a second discharge pipe. The powder outlet of the powder container is connected to a second fluid conveying device through the second conveying pipe, and the second fluid conveying device is connected to a mixing reaction vessel through the second discharge pipe.

[0013] The additive feeding mechanism also includes a third conveying pipe and a third discharging pipe. The discharge port of each additive container is connected to a third fluid conveying device through the third conveying pipe. The third fluid conveying device is connected to a mixing reaction vessel through the third discharging pipe.

[0014] Flow acquisition units are respectively installed on the first discharge pipe, the second discharge pipe, and the third discharge pipe.

[0015] According to one example of this utility model, the first discharge pipe, the second discharge pipe, and the third discharge pipe are each provided with a control valve, and the control unit is electrically connected to the control valve to control the on / off state of the control valve.

[0016] According to one example of the present invention, the control valve is disposed between the flow acquisition unit and the mixing reaction vessel.

[0017] According to one example of this utility model, the control valve is a shut-off valve.

[0018] According to one example of the present invention, the first fluid conveying device and the third fluid conveying device are centrifugal pumps.

[0019] According to one example of the present invention, the second fluid delivery device is a diaphragm pump.

[0020] According to one example of this utility model, the flow acquisition unit on the first discharge pipe and the third discharge pipe is a rotor flow valve.

[0021] According to one example of this utility model, the flow acquisition unit on the second discharge pipe is a mass flow valve.

[0022] The following benefits can be obtained by adopting this technical solution:

[0023] (1) By monitoring the raw material flow rate of powder, liquid and additive and the material weight before and after mixing, and feeding back the real-time raw material flow rate and material weight to the control unit, the speed of the centrifugal pump and the opening of the diaphragm pump can be automatically adjusted to solve the problem of inaccurate metering during the feeding of water-reducing agent, so that the feeding accuracy of liquid is improved to ±1% and the feeding accuracy of powder is improved to ±2%.

[0024] (2) By installing control valves on each discharge pipe, the working status of the control valves can be precisely controlled remotely, reducing the need for manual intervention. A diaphragm pump is used to control the start and stop of powder feeding by using compressed air for negative pressure suction.

[0025] (3) The modular integrated design allows powder feeding and liquid feeding to be operated separately or in conjunction, which broadens the application range of the control system and can also improve the preparation efficiency of polycarboxylate superplasticizer.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an automatic feeding control system for polycarboxylate superplasticizer according to an embodiment of this utility model.

[0029] The attached figures are labeled as follows:

[0030] 1. Mixing reaction vessel; 2. Control unit; 3. Mother liquor container; 4. Water container; 5. First conveying pipe; 6. First fluid conveying device; 7. First discharge pipe; 8. Powder container; 9. Second conveying pipe; 10. Second fluid conveying device; 11. Second discharge pipe; 12. Third conveying pipe; 13. Third fluid conveying device; 14. Third discharge pipe; 15. Stirring device; 16. Flow acquisition unit; 17. Weighing unit; 18. Air-entraining agent tank; 19. Defoamer tank; 20. Water-retaining agent tank; 21. TN tank; 22. Control valve; 23. Feeding hopper. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] Please see Figure 1 As shown, this utility model provides an automatic feeding control system for polycarboxylate superplasticizer, including: a liquid feeding mechanism, a powder feeding mechanism, an additive feeding mechanism, a mixing reaction vessel 1, and a control unit 2.

[0033] The liquid feeding mechanism includes a mother liquor container 3, a water container 4, a first conveying pipe 5, a first fluid conveying device 6, and a first discharge pipe 7. The mother liquor container and the water container are respectively connected to the mixing reaction vessel 1 through the first fluid conveying device 6. Specifically, the outlets of the mother liquor container 3 and the water container 4 are respectively connected to the first fluid conveying device 6 through the first conveying pipe 5, and each first fluid conveying device 6 is respectively connected to the mixing reaction vessel 1 through the first discharge pipe 7.

[0034] The powder feeding mechanism includes a powder container 8, a second conveying pipe 9, a second fluid conveying device 10, and a second discharge pipe 11. The powder container 8 is connected to the mixing reaction vessel 1 via the second fluid conveying device 10. Specifically, the top of the powder container 8 is provided with a feeding hopper 23, the powder outlet of the powder container 8 is connected to the second fluid conveying device 10 via the second conveying pipe 9, and the second fluid conveying device 10 is connected to the mixing reaction vessel 1 via the second discharge pipe 11.

[0035] The additive feeding mechanism includes at least one additive container, a third conveying pipe 12, a third fluid conveying device 13, and a third discharge pipe 14. The additive container is connected to the mixing reaction container via the third fluid conveying device. Specifically, the discharge port of each additive container is connected to the third fluid conveying device 13 via the third conveying pipe 12. The third fluid conveying device 13 is connected to the mixing reaction container 1 via the third discharge pipe 14. The mixing reaction container 1 is equipped with a stirring device 15 for stirring liquids, water, powders, and additives. A heating device can also be installed on the mixing reaction container 1 as needed. The mother liquor container 3 stores polycarboxylate mother liquor, the aqueous solution container stores water, and the powder container 8 stores powdered materials such as white sugar or sodium thiosulfate. Multiple additive containers are provided, including an air-entraining agent tank 18, an antifoaming agent tank 19, a water-retaining agent tank 20, and a TN (sodium gluconate aqueous solution) tank 21.

[0036] Each fluid conveying device is equipped with a flow acquisition unit 16 on the first discharge pipe 7, the second discharge pipe 11, and the third discharge pipe 14 between the fluid conveying device and the mixing reaction vessel 1. The control unit 2 is also connected to a display screen, so that the construction personnel can more intuitively know the proportions of water, mother liquor, powder, air-entraining agent, defoamer, water-retaining agent, and TN agent added to the mixing reaction vessel 1. The mixing reaction vessel 1 is equipped with a weighing unit 17. The first discharge pipe 7, the second discharge pipe 11, and the third discharge pipe 14 are also equipped with control valves 22 located between the flow acquisition unit 16 and the mixing reaction vessel 1. The first fluid conveying device 6, the second fluid conveying device 10, the third fluid conveying device 13, the flow acquisition unit 16, the weighing unit 17, and the control valves 22 are electrically connected to the control unit 2. The control unit 2 is controlled by a PLC and is used to compare the flow information of each raw material collected by the flow acquisition unit 16, the weight information of the compounded material collected by the weighing unit 17, and the preset information stored in the control unit 2. Based on the comparison results, the control unit 2 controls the working status of the first fluid conveying device 6, the second fluid conveying device 10, and the third fluid conveying device 13, and also controls the on / off state of the control valves 2.

[0037] In this application, the amount of raw materials added during compounding is monitored by the flow acquisition unit 16 and the weighing unit 17, which makes the raw material ratio intelligent and controllable, the operation more convenient, and the labor intensity reduced.

[0038] In this embodiment, the first fluid conveying device 6 and the third fluid conveying device 13 are centrifugal pumps, the second fluid conveying device 10 is a diaphragm pump, the flow acquisition unit 16 on the first discharge pipe 7 and the third discharge pipe 14 is a rotor flow valve, the flow acquisition unit 16 on the second discharge pipe 11 is a mass flow valve, the mixing reaction vessel 1 is a compounding vessel, and two weighing units 17 are provided on the outer wall of the compounding vessel to improve the compounding accuracy and avoid compounding quality problems caused by individual metering abnormalities; the control valve 22 is a shut-off valve, and the overall automation level of this system is high.

[0039] The order of adding raw materials for polycarboxylate superplasticizer follows a conventional process and is not an innovation of this application, so it will not be elaborated upon.

[0040] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 utility model according to the specific circumstances.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0043] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. An automatic feeding control system for polycarboxylate superplasticizer, characterized in that, include: Liquid feeding mechanism, powder feeding mechanism, additive feeding mechanism, mixing reaction vessel and control unit; The liquid feeding mechanism includes a mother liquor container and a water container, which are respectively connected to the mixing reaction vessel via a first fluid conveying device; The powder feeding mechanism includes a powder container connected to the mixing reaction vessel via a second fluid conveying device; The additive feeding mechanism includes at least one additive container connected to the mixing reaction vessel via a third fluid conveying device; Each fluid delivery device is equipped with a flow acquisition unit between itself and the mixing reaction vessel. The mixing reaction vessel is equipped with a weighing unit. Each fluid delivery device, flow acquisition unit, and weighing unit is electrically connected to the control unit. The control unit controls the working status of each fluid delivery device based on the flow information acquired by the flow acquisition unit and the weight information acquired by the weighing unit.

2. The automatic feeding control system for polycarboxylate superplasticizer according to claim 1, characterized in that: The auxiliary agent containers are provided in multiple ways, namely, an air-entraining agent container, an antifoaming agent container, a water-retaining agent container, and a TN container.

3. The automatic feeding control system for polycarboxylate superplasticizer as described in claim 1 or 2, characterized in that: The liquid feeding mechanism further includes a first conveying pipe and a first discharging pipe. The outlets of the mother liquor container and the water container are respectively connected to the first fluid conveying device through the first conveying pipe. Each of the first fluid conveying devices is respectively connected to the mixing reaction container through the first discharging pipe. The powder feeding mechanism further includes a second conveying pipe and a second discharge pipe. The powder outlet of the powder container is connected to a second fluid conveying device through the second conveying pipe, and the second fluid conveying device is connected to a mixing reaction vessel through the second discharge pipe. The additive feeding mechanism also includes a third conveying pipe and a third discharging pipe. The discharge port of each additive container is connected to a third fluid conveying device through the third conveying pipe. The third fluid conveying device is connected to a mixing reaction vessel through the third discharging pipe. A flow acquisition unit is installed on the first discharge pipe, the second discharge pipe, and the third discharge pipe respectively.

4. The automatic feeding control system for polycarboxylate superplasticizer according to claim 3, characterized in that: The first discharge pipe, the second discharge pipe, and the third discharge pipe are each equipped with a control valve. The control unit is electrically connected to the control valve and is used to control the on / off state of the control valve.

5. The automatic feeding control system for polycarboxylate superplasticizer according to claim 4, characterized in that: The control valve is located between the flow acquisition unit and the mixing reaction vessel.

6. The automatic feeding control system for polycarboxylate superplasticizer according to claim 4, characterized in that: The control valve is a shut-off valve.

7. The automatic feeding control system for polycarboxylate superplasticizer according to claim 1 or 2, characterized in that: The first fluid delivery device and the third fluid delivery device are centrifugal pumps.

8. The automatic feeding control system for polycarboxylate superplasticizer according to claim 1 or 2, characterized in that: The second fluid delivery device is a diaphragm pump.

9. The automatic feeding control system for polycarboxylate superplasticizer according to claim 3, characterized in that: The flow acquisition units on the first and third discharge pipes are rotor flow valves.

10. The automatic feeding control system for polycarboxylate superplasticizer according to claim 3, characterized in that: The flow acquisition unit on the second discharge pipe is a mass flow valve.

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