CN215963523U

CN215963523U - Quantitative dropping device

Info

Publication number: CN215963523U
Application number: CN202120945591.5U
Authority: CN
Inventors: 濮文均; 袁小军
Original assignee: MAX (RUDONG) CHEMICALS CO LTD
Current assignee: MAX (RUDONG) CHEMICALS CO LTD
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2022-03-08
Anticipated expiration: 2031-05-06

Abstract

The utility model discloses a quantitative dropping device, which comprises a DMF storage tank, a DMF overflow storage tank, a quantitative cylinder and an acyl chlorination kettle, wherein one side of the quantitative cylinder is fixedly communicated with a feeding hose, one end of the feeding hose is fixedly communicated with an extraction pump, an air inlet of the extraction pump is fixedly communicated with the DMF storage tank, the bottom of the inner wall of the quantitative cylinder is fixedly communicated with a loop insertion pipe, one end of the loop insertion pipe passes through the quantitative cylinder and is fixedly communicated with a return pipe, one end of the return pipe is fixedly communicated with the DMF overflow storage tank, and the bottom of the quantitative cylinder is fixedly communicated with a dropping pipe. So that the acyl chlorination reaction is more complete and safer.

Description

Quantitative dropping device

Technical Field

The utility model relates to the technical field of droppers, in particular to a quantitative dropper.

Background

When PDA is produced, DMF materials need to be quantitatively added into an acyl chlorination kettle in multiple batches, the dosage of the DMF materials needs to be strictly controlled, and a commonly used quantitative adding control device is a quantitative dripping device at present. Like chinese patent, application number 201920236987.5, a quantitative dropwise add device is disclosed, its cooperation that adopts first sleeve and scale makes things convenient for the staff to control the measurement of input catalyst in advance, makes the piston carry out reciprocating motion through the carousel simultaneously, can make the catalyst automatic dropwise add gradually, avoids appearing the inside local raw materials of reactor and the condition of a large amount of catalyst contact reaction in the twinkling of an eye and appears. The existing quantitative dropping device is generally provided with a similar sleeve for quantitatively putting a large amount of liquid, the feeding time is prolonged by the alignment process of the liquid level and the scale marks during large-amount quantitative feeding, and partial staff with poor eyesight cannot perform the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a quantitative dropping device to solve the problems that the conventional quantitative dropping device in the background art is generally provided with a similar sleeve to quantitatively throw a large amount of liquid, but the process of aligning the liquid level with a scale mark increases the feeding time during the large-amount quantitative process, part of staff with poor eyesight cannot perform the operation, and the catalytic efficiency of the dropping device is reduced.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a ration dropwise add ware, includes DMF storage tank, DMF overflow storage tank, a quantitative section of thick bamboo and acyl chlorination cauldron, the fixed intercommunication in one side of a quantitative section of thick bamboo has the feeding hose, the fixed intercommunication in one end of feeding hose has the extraction pump, the fixed intercommunication in air inlet of extraction pump has the DMF storage tank, the fixed intercommunication in bottom of a quantitative section of thick bamboo inner wall has the loop insert tube, the one end of loop insert tube is passed the fixed intercommunication in a quantitative section of thick bamboo and is had the back flow, the fixed intercommunication in one end of back flow has DMF overflow storage tank, the fixed intercommunication in bottom of a quantitative section of thick bamboo has the dropwise add pipe, the middle part fixed mounting of dropwise add pipe has electronic valve, the fixed intercommunication in bottom of dropwise add pipe has the acyl chlorination cauldron, the inside fixed mounting of acyl chlorination cauldron has agitating unit.

As a preferred technical scheme, the stirring device comprises a motor box, a servo motor, a stirring shaft and a plurality of stirring blades, the motor box is fixedly installed at the top of the acyl chlorination kettle, the servo motor is fixedly installed inside the motor box, the stirring shaft is fixedly installed at the output end of the servo motor, and the stirring blades are fixedly installed on two sides of the stirring shaft.

As a preferred technical scheme of the utility model, a sealing ring is sleeved at the joint of the loop insertion tube and the quantifying cylinder.

As a preferred technical scheme of the utility model, the two ends of the quantitative cylinder are fixedly provided with the balance plates.

As a preferable technical scheme of the utility model, the middle part of the return pipe is fixedly provided with a sight glass.

Compared with the prior art, the utility model has the beneficial effects that: the user pours into DMF into through the aspiration pump in to the ration section of thick bamboo, and when the aspiration pump extraction DMF was too much, unnecessary DMF flowed into in the loop insert tube and flows back to in the DMF overflow storage tank and avoid the material extravagant, and the ration mode of ration section of thick bamboo is simple, and the ration time is short, and the many batches of ration of DMF after the ration are added to acyl chloride reation kettle in for acyl chlorination reaction is more thorough, safer.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the configuration of the acylchlorination reactor of the present invention.

FIG. 3 is a schematic view of the quantitative cylinder of the present invention.

In the figure: 1. a DMF storage tank; 2. a feed hose; 3. a pump; 4. a DMF overflow storage tank; 5. a loop insertion tube; 6. a sight glass; 7. a dosing cylinder; 8. a return pipe; 9. a balance plate; 10. a dropping pipe; 11. an electronic valve; 12. an acyl chlorination kettle; 13. a motor case; 14. a servo motor; 15. a stirring device; 16. a stirring shaft; 17. a stirring blade; 18. and (5) sealing rings.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-3, a quantitative dropping device comprises a DMF storage tank 1, a DMF overflow storage tank 4, a quantitative cylinder 7 and an acyl chlorination kettle 12, wherein a feeding hose 2 is fixedly communicated with one side of the quantitative cylinder 7, an extraction pump 3 is fixedly communicated with one end of the feeding hose 2, the DMF storage tank 1 is fixedly communicated with an air inlet of the extraction pump 3, a loop insertion pipe 5 is fixedly communicated with the bottom of the inner wall of the quantitative cylinder 7, one end of the loop insertion pipe 5 passes through the quantitative cylinder 7 and is fixedly communicated with a return pipe 8, one end of the return pipe 8 is fixedly communicated with the DMF overflow storage tank 4, a dropping pipe 10 is fixedly communicated with the bottom of the quantitative cylinder 7, an electronic valve 11 is fixedly installed in the middle of the dropping pipe 10, the bottom of the dropping pipe 10 is fixedly communicated with the acyl chlorination kettle 12, a stirring device 15 is fixedly installed inside the acyl chlorination kettle 12, the extraction pump 3 is started, the extraction pump 3 extracts DMF from the DMF storage tank 1, the extraction pump 3 conveys the extracted DMF into the quantitative cylinder 7 through the feeding hose 2, when the extraction pump 3 extracts the DMF excessively, redundant DMF flows into the loop inserting pipe 5, the DMF in the loop inserting pipe 5 flows back to the DMF overflow storage tank 4 through the return pipe 8, when the extraction pump 3 extracts the DMF less than required, a user observes through the sight glass 6 that the return pipe 8 does not flow back, the extraction pump 3 continues to extract, the quantitative mode of the quantitative cylinder 7 is simple, and the quantitative time is short.

Agitating unit 15 includes motor case 13, servo motor 14, (mixing) shaft 16 and a plurality of stirring vane 17, the top fixed mounting of acyl chlorination cauldron 12 has motor case 13, the inside fixed mounting of motor case 13 has servo motor 14, servo motor 14's output fixed mounting has (mixing) shaft 16, the equal fixed mounting in both sides of (mixing) shaft 16 has a plurality of stirring vane 17, servo motor 14 starts, servo motor 14 drives (mixing) shaft 16 and rotates, stirring vane 17 on the (mixing) shaft 16 carries out intensive mixing to DMF and raw materials.

The sealing ring 18 is sleeved at the joint of the loop inserting tube 5 and the quantifying cylinder 7, and the sealing performance of the connection of the quantifying cylinder 7 and the loop inserting tube 5 is improved by arranging the sealing ring 18.

The both ends of a quantification section of thick bamboo 7 are equal fixed mounting have balance plate 9, and the user steadily places a quantification section of thick bamboo 7 through balance plate 9.

The sight glass 6 is fixedly arranged in the middle of the return pipe 8, and a user can observe whether the material in the return pipe 8 completely flows back through the sight glass 6, so that DMF is prevented from remaining in the return pipe 8.

During production operation, because the quantitative cylinder 7 is small and convenient, a user stably places the quantitative cylinder 7 through the balance plate 9, the extraction pump 3 is started, the extraction pump 3 extracts DMF from the DMF storage tank 1, the extraction pump 3 conveys the extracted DMF into the quantitative cylinder 7 through the feeding hose 2, when the extraction pump 3 extracts excessive DMF, redundant DMF flows into the loop insertion pipe 5, the DMF in the loop insertion pipe 5 flows back to the DMF overflow storage tank 4 through the return pipe 8, when the extraction pump 3 extracts DMF less than required, the user observes through the sight glass 6 that the return pipe 8 does not return, the extraction pump 3 continues to extract, the quantitative mode of the quantitative cylinder 7 is simple, the quantitative time is short, the user observes through the sight glass 6 whether the material in the return pipe 8 completely returns, the phenomenon that DMF remains in the return pipe 8 is avoided, the electronic valve 11 is opened, the dropping pipe 10 quantitatively adds DMF into the acyl chlorination kettle 12 for a plurality of times, the servo motor 14 starts, the servo motor 14 drives the stirring shaft 16 to rotate, the stirring blades 17 on the stirring shaft 16 fully stir the DMF and the raw materials, and the acyl chlorination reaction is more thorough and safer.

Claims

1. The utility model provides a ration dropwise add ware, includes DMF storage tank (1), DMF overflow storage tank (4) and quantitative section of thick bamboo (7), its characterized in that: the fixed intercommunication in one side of a ration section of thick bamboo (7) has feeding hose (2), the fixed intercommunication in one end of feeding hose (2) has extraction pump (3), the fixed intercommunication in air inlet of extraction pump (3) has DMF storage tank (1), the fixed intercommunication in bottom of a ration section of thick bamboo (7) inner wall has loop insert tube (5), the one end of loop insert tube (5) is passed a ration section of thick bamboo (7) and is fixed the intercommunication and have back flow (8), the fixed intercommunication in one end of back flow (8) has DMF overflow storage tank (4), the fixed intercommunication in bottom of a ration section of thick bamboo (7) has dropwise add pipe (10), the middle part fixed mounting of dropwise add pipe (10) has electronic valve (11).

2. A metered dose dispenser as in claim 1, wherein: the bottom of the dropping pipe (10) is fixedly communicated with an acyl chlorination kettle (12), and a stirring device (15) is fixedly arranged in the acyl chlorination kettle (12).

3. A metered dose dispenser as in claim 2, wherein: agitating unit (15) include motor case (13), servo motor (14), (mixing) shaft (16) and a plurality of stirring vane (17), the top fixed mounting of acyl chlorination cauldron (12) has motor case (13), the inside fixed mounting of motor case (13) has servo motor (14), the output fixed mounting of servo motor (14) has (mixing) shaft (16), the equal fixed mounting in both sides of (mixing) shaft (16) has a plurality of stirring vane (17).

4. A metered dose dispenser as in claim 1, wherein: the joint of the loop inserting tube (5) and the quantifying cylinder (7) is sleeved with a sealing ring (18).

5. A metered dose dispenser as in claim 1, wherein: and balance plates (9) are fixedly arranged at two ends of the quantifying cylinder (7).

6. A metered dose dispenser as in claim 1, wherein: and the middle part of the return pipe (8) is fixedly provided with a sight glass (6).