Precise quantitative ramming device for barreled solvent

Abstract

The utility model belongs to the technical field of quantitative ramming, and particularly relates to an accurate quantitative ramming device for barreled solvents, which comprises a PLC (programmable logic controller), an anti-explosion high-precision mixing platform scale and a pneumatic diaphragm pump, and the anti-explosion high-precision mixing platform scale and the pneumatic diaphragm pump are both electrically connected with the PLC. A compressed air supply set electrically connected with the PLC is installed at the air inlet end of the pneumatic diaphragm pump, a pump front material pumping set electrically connected with the PLC is installed at the input end of the pneumatic diaphragm pump, and the pneumatic diaphragm pump communicates with a discharging valve set electrically connected with the PLC through a material conveying pipe. The material conveying pipe communicates with a nitrogen purging set electrically connected with the PLC. According to the quantitative knockout device, the purpose of accurate and quantitative knockout can be achieved, residual materials in the conveying pipe can be punched, blown and cleaned after knockout is completed, and the residual materials in a vertical pipeline of the conveying pipe are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of quantitative feeding, and particularly relates to a precise quantitative feeding device for barreled solvents. Background Art

[0002] Currently, in the chemical synthesis API workshop, mobile explosion-proof electronic platform scales or fixed explosion-proof weighing platform scales are commonly used for metering. Personnel place the barreled materials on the scale, connect a pneumatic diaphragm pump, open the compressed air hand valve, and open the feeding hand valve to feed. Manually observe the change of the scale value, and when the feeding amount is reached, manually close the compressed air hand valve and the feeding hand valve.

[0003] The above operations have a relatively large manual operation intensity, a relatively large metering error, and too much residue in the material pipeline, which affects the accuracy of the feeding amount and thus affects the product quality; and there is residue in the feeding pipeline, posing a certain safety risk. Summary of the Utility Model

[0004] The purpose of this utility model is to provide a precise quantitative feeding device for barreled solvents, which can achieve the purpose of precise quantitative feeding and can perform stamping and purging cleaning on the residual materials inside the feeding pipe after feeding is completed, reducing the residual materials inside the vertical pipe of the feeding pipe.

[0005] The technical solution adopted by this utility model is specifically as follows:

[0006] A precise quantitative feeding device for barreled solvents includes a PLC controller, an explosion-proof high-precision mixing platform scale, and a pneumatic diaphragm pump. Both the explosion-proof high-precision mixing platform scale and the pneumatic diaphragm pump are electrically connected to the PLC controller. An air supply group for compressed air electrically connected to the PLC controller is installed at the air inlet end of the pneumatic diaphragm pump. A pre-pump material extraction group electrically connected to the PLC controller is installed at the input end of the pneumatic diaphragm pump. The pneumatic diaphragm pump is connected through a feeding pipe to a discharge valve group electrically connected to the PLC controller. The feeding pipe is connected to a nitrogen purging group electrically connected to the PLC controller.

[0007] Further, the air supply group for compressed air includes a compressed air pipeline connected to the air inlet end of the pneumatic diaphragm pump. The far end of the compressed air pipeline away from the pneumatic diaphragm pump is connected to an air source. An air filter and pressure regulator and a compressed air cut-off valve are successively installed on the compressed air pipeline from the far end away from the pneumatic diaphragm pump to the near end close to the pneumatic diaphragm pump. The compressed air cut-off valve is electrically connected to the PLC controller.

[0008] Further, the installation height of the pneumatic diaphragm pump is 1.3M.

[0009] Further, the feeding group before the pump includes a pumping barrel connected to a pneumatic diaphragm pump. A first nitrogen cut-off valve electrically connected to the PLC controller is installed on the pumping barrel, and the first nitrogen cut-off valve is connected to a second nitrogen gas source.

[0010] Further, the discharge valve group includes three feeding cut-off valves installed on the material conveying pipe, and the feeding cut-off valves are electrically connected to the PLC controller.

[0011] Further, the nitrogen purging group includes a second nitrogen cut-off valve connected to the material conveying pipe. The second nitrogen cut-off valve is electrically connected to the PLC controller, and the second nitrogen cut-off valve is connected to a first nitrogen gas source.

[0012] The technical effects achieved by this utility model are as follows:

[0013] A precise quantitative feeding device for barreled solvents of this utility model can achieve the purpose of precise quantitative feeding by setting an explosion-proof high-precision mixing platform scale. And by setting a nitrogen purging group on the material conveying pipe, it can perform stamping and purging cleaning on the residual materials inside the material conveying pipe after feeding, reducing the residual materials inside the vertical pipe of the material conveying pipe. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of this utility model.

[0015] In the drawings, the list of components represented by each reference numeral is as follows:

[0016] 1. Explosion-proof high-precision mixing platform scale; 2. Material barrel; 3. Pumping barrel; 4. First nitrogen cut-off valve; 5. Pneumatic diaphragm pump; 6. Compressed air cut-off valve; 7. Air filter and pressure regulator; 8. Second nitrogen cut-off valve; 9. Feeding cut-off valve; 10. Reactor; 11. Air gas source; 12. First nitrogen gas source; 13. Second nitrogen gas source. Detailed Embodiments

[0017] In order to make the purpose and advantages of this utility model clearer, the following specifically describes this utility model in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of this utility model, and does not strictly limit the specific protection scope claimed by this utility model.

[0018] As Figure 1As shown in the figure, a precise quantitative feeding device for barreled solvents includes a PLC controller, an explosion-proof high-precision mixing platform scale 1, and a pneumatic diaphragm pump 5. Both the explosion-proof high-precision mixing platform scale 1 and the pneumatic diaphragm pump 5 are electrically connected to the PLC controller. The range of the explosion-proof high-precision mixing platform scale 1 is 0 to 1t, and the accuracy class is C6. The intake end of the pneumatic diaphragm pump 5 is equipped with a compressed air supply group electrically connected to the PLC controller. Using compressed air as the power source, the maximum pressure at the pump outlet of the pneumatic diaphragm pump 5 is the input pressure of the air source.

[0019] Among them, as Figure 1 shown, the compressed air supply group includes a compressed air pipeline connected to the intake end of the pneumatic diaphragm pump 5. The end of the compressed air pipeline far from the pneumatic diaphragm pump 5 is connected to an air source 11. The air source 11 can be an air compression cylinder or an air compressor. The pressure of the air compression cylinder is preferably 0.7MPa. An air filter pressure regulator 7 and a compressed air cut-off valve 6 are successively installed on the compressed air pipeline from the end far from the pneumatic diaphragm pump 5 to the end close to the pneumatic diaphragm pump 5. The compressed air cut-off valve 6 is electrically connected to the PLC controller. When the compressed air cut-off valve 6 is opened, air intake can be carried out. During air intake, since the air filter pressure regulator 7 is provided on the compressed air pipeline, it is convenient to adjust the air source pressure, prevent excessive pressure and too fast conveying speed, and reduce precision errors.

[0020] The input end of the pneumatic diaphragm pump 5 is equipped with a pre-pump feeding group electrically connected to the PLC controller. The installation height of the pneumatic diaphragm pump 5 is 1.3M, which is convenient for the residual material inside the pre-pump feeding group to flow back into the barrel by gravity;

[0021] When the material barrel 2 is placed on the explosion-proof high-precision mixing platform scale 1, the pre-pump feeding group is inserted into the inside of the material barrel 2, and then the pneumatic diaphragm pump 5 is started to suck the material inside the material barrel 2. During suction, the explosion-proof high-precision mixing platform scale 1 will monitor the change in the weight of the material inside the material barrel 2. When the weight of the material drawn out of the material barrel 2 reaches the feeding amount, the PLC controller automatically closes the pneumatic diaphragm pump 5 to stop feeding.

[0022] Here, the pre-pump feeding group includes a syringe 3 connected to the pneumatic diaphragm pump 5. The syringe 3 can be inserted into the inside of the material barrel 2 and the interface position can be adjusted up and down according to the height of the material barrel 2. A first nitrogen cut-off valve 4 electrically connected to the PLC controller is installed on the syringe 3. The first nitrogen cut-off valve 4 is connected to a second nitrogen gas source 13. The second nitrogen gas source 13 can be a nitrogen cylinder, and the pressure value of the nitrogen cylinder is preferably 1 - 4KPa.

[0023] At the same time, as Figure 1As shown, the pneumatic diaphragm pump 5 is connected through a material conveying pipe to a discharge valve group electrically connected to a PLC controller. The discharge valve group is connected to the reaction kettle 10. At this time, when the feed cut-off valve 9 is opened, the material can be conveyed into the interior of the reaction kettle 10. Since the weight of the material is weighed by the explosion-proof high-precision mixing platform scale 1 during the feeding process, the purpose of accurate quantitative feeding can be achieved;

[0024] Specifically, the discharge valve group includes three feed cut-off valves 9 installed on the material conveying pipe. The feed cut-off valves 9 are electrically connected to the PLC controller, and the three feed cut-off valves 9 are respectively connected to the three reaction kettles 10, so as to achieve the purpose of feeding multiple reaction kettles 10.

[0025] Moreover, as Figure 1 shown, the material conveying pipe is connected to a nitrogen purging group electrically connected to the PLC controller. After the feeding is completed, the residual material inside the material conveying pipe is purged by the nitrogen purging group, which can reduce the residual amount of the material in the material conveying pipe.

[0026] The nitrogen purging group includes a second nitrogen cut-off valve 8 connected to the material conveying pipe. The second nitrogen cut-off valve 8 is electrically connected to the PLC controller. The second nitrogen cut-off valve 8 is connected to a first nitrogen gas source 12. The first nitrogen gas source 12 is a nitrogen gas cylinder with a preferred pressure of 0.7 MPa.

[0027] When the second nitrogen cut-off valve 8 is opened, air is blown into the material conveying pipe through a pneumatic purging device, and thus the residual material inside the material conveying pipe can be purged by pressing.

[0028] The working principle of this utility model is as follows: Place the material bucket 2 on the explosion-proof high-precision mixing platform scale 1, insert the extractor 3 into the interior of the material bucket 2, and then open the pneumatic diaphragm pump 5, the compressed air cut-off valve 6 and the feed cut-off valve 9, so that the pneumatic diaphragm pump 5 conveys the material inside the material bucket 2 into the material conveying pipe and conveys it into the interior of the reaction kettle 10 through the feed cut-off valve 9;

[0029] After the material conveying is completed, open the second nitrogen cut-off valve 8. When the second nitrogen cut-off valve 8 is opened, air is blown into the material conveying pipe through a pneumatic purging device, and thus the residual material inside the material conveying pipe can be purged by pressing, reducing the residual material inside the vertical pipe of the material conveying pipe. After the discharging is completed, by purging with nitrogen multiple times, the residual amount inside the pipe can be reduced.

[0030] In summary, through the setting of the explosion-proof high-precision mixing platform scale 1, the purpose of accurate quantitative feeding can be achieved in this technical solution. Moreover, by setting a nitrogen purging group on the material conveying pipe, the residual material inside the material conveying pipe can be purged by pressing after the feeding is completed, reducing the residual material inside the vertical pipe of the material conveying pipe.

[0031] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented according to the conventional means in the art without special description and limitation.

Claims

1. A device for accurately quantitatively dispensing barreled solvents, characterized in that: The invention comprises a PLC controller, an explosion-proof high-precision hybrid platform scale (1) and a pneumatic diaphragm pump (5), wherein the explosion-proof high-precision hybrid platform scale (1) and the pneumatic diaphragm pump (5) are both electrically connected to the PLC controller, the air inlet end of the pneumatic diaphragm pump (5) is provided with a compressed air supply group electrically connected to the PLC controller, the input end of the pneumatic diaphragm pump (5) is provided with a pre-pump extraction group electrically connected to the PLC controller, the pneumatic diaphragm pump (5) is connected to a discharge valve group electrically connected to the PLC controller via a feed pipe, and the feed pipe is connected to a nitrogen purge group electrically connected to the PLC controller.

2. According to claim 1, a barreled solvent precise quantitative charging device is characterized by: The compressed air supply group comprises a compressed air pipeline connected to the air inlet end of the pneumatic diaphragm pump (5); the end of the compressed air pipeline away from the pneumatic diaphragm pump (5) is connected to an air source (11); an air filter pressure reducer (7) and a compressed air shut-off valve (6) are installed in sequence on the compressed air pipeline from the end away from the pneumatic diaphragm pump (5) to the end close to the pneumatic diaphragm pump (5); the compressed air shut-off valve (6) is electrically connected to a PLC controller.

3. According to claim 1, a barreled solvent precise quantitative charging device is characterized by: The installation height of the pneumatic diaphragm pump (5) is 1.3 m.

4. According to claim 1, a barreled solvent precise quantitative charging device is characterized by: The pre-pump material extraction group comprises a tube extractor (3) connected to a pneumatic diaphragm pump (5), and a first nitrogen shut-off valve (4) electrically connected to a PLC controller is installed on the tube extractor (3), and the first nitrogen shut-off valve (4) is connected to a second nitrogen gas source (13).

5. The device for accurately quantitatively dispensing barreled solvents according to claim 1 is characterized in that: The discharge valve group comprises three feed cut-off valves (9) installed on the feed pipe, and the feed cut-off valves (9) are electrically connected to the PLC controller.

6. The device for accurately quantitatively dispensing barreled solvents according to claim 1, characterized in that: The nitrogen purge group comprises a second nitrogen shut-off valve (8) connected to the feed pipe, the second nitrogen shut-off valve (8) is electrically connected to the PLC controller, and the second nitrogen shut-off valve (8) is connected to a first nitrogen gas source (12).

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