Reaction device for preparing difluoroacetic anhydride

Abstract

The utility model discloses a reaction device for preparing difluoroacetic anhydride, which relates to the technical field of medicine preparation, and comprises a reaction kettle main body and lifting components, the top of the reaction kettle main body is provided with a sealing cover, a driving component is erected above the sealing cover, and the lifting components are connected to the left side and the right side of the driving component. And the bottom end of the driving assembly is connected with a stirring assembly. According to the reaction device for preparing difluoroacetic anhydride, the driving assembly is driven by the lifting assembly to reciprocate up and down in the vertical direction, so that the stirring assembly connected to the bottom of the driving assembly can further move up and down in the reaction kettle main body while axially rotating in the vertical direction; therefore, the materials are stirred and mixed in all directions to the maximum extent, the materials are fully reacted, and when the structure operates, the scraping plate can rotate in a manner of being attached to the interior of the reaction kettle main body, so that the materials are prevented from adhering to each other, and the reaction effect is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine preparation, in particular to a reaction device for preparing difluoroacetic anhydride. Background Art

[0002] Difluoroacetic anhydride is mainly used as an acylating agent in organic synthesis to introduce difluoroacetyl groups. Difluoroacetate is an intermediate mainly used in pesticides, pharmaceuticals and fluorine-containing fine chemicals, and can also be used as a solvent in lithium battery electrolytes;

[0003] During this process, a reaction device is used to mix and stir the materials.

[0004] When a conventional stirring device is in operation, the stirring roller inside it is relatively located in the middle of the entire reactor. Considering the chemical reaction between the reactants, it will affect the operation of the stirring device and cause insufficient mixing of the materials. The materials sticking to the inner wall surface of the reactor will also affect the final reaction effect.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a reaction device for preparing difluoroacetic anhydride is proposed. Utility Model Content

[0006] The utility model aims to provide a reaction device for preparing difluoroacetic anhydride to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a reaction device for preparing difluoroacetic anhydride, comprising a reactor body and a lifting assembly, a cover is installed on the top of the reactor body, and a driving assembly is mounted above the cover, the lifting assembly is connected to the left and right sides of the driving assembly, and the bottom end of the driving assembly is connected to a stirring assembly, a discharge valve is symmetrically installed at the bottom of the reactor body, and auxiliary brackets are installed at the lower ends of the front and rear sides of the reactor body, the lifting assembly comprises a first bracket, a servo motor, a screw and a left bottom frame, a servo motor is installed on the top of the first bracket, and a screw is installed at the bottom power output end of the servo motor through a coupling, and a left bottom frame is installed at the bottom of the first bracket.

[0008] Furthermore, the reactor body and the cover are connected by a flange, and the auxiliary bracket is fixedly connected to the reactor body.

[0009] Furthermore, the driving assembly includes an AC motor, a transmission roller, a balancing frame and a slider, the bottom power output end of the AC motor is vertically installed with a transmission roller through a coupling, and the left and right sides of the AC motor are horizontally installed with balancing frames, and a slider is installed at the end of the balancing frame away from the AC motor.

[0010] Furthermore, the lifting assembly also includes a second bracket and a right bottom bracket. The second bracket is vertically arranged on the reactor body away from the first bracket, and the right bottom bracket is installed at the bottom of the second bracket.

[0011] Furthermore, the auxiliary bracket, the right bottom frame and the left bottom frame have the same structure and are all welded to the reactor body, and the transmission roller passes through the center of the cover.

[0012] Furthermore, the second bracket and the first bracket are both vertically fixed on the left and right sides of the reactor body, and the slider is slidably connected to the second bracket and the first bracket respectively, and one end of the balance frame is threadedly connected to the lead screw.

[0013] Furthermore, the stirring assembly includes an assembly sleeve, a fixing frame, a scraper and fastening bolts, the side of the assembly sleeve is horizontally connected to the fixing frame, the scraper is inserted inside the fixing frame, and the fastening bolts are threadedly connected between the scraper and the fixing frame.

[0014] Furthermore, the fixing frames are arranged in a circular array with the mounting sleeve as the center, and the mounting sleeve is fixedly connected to the fixing frames.

[0015] The utility model provides a reaction device for preparing difluoroacetic anhydride, which has the following beneficial effects:

[0016] 1. In the utility model, driven by the servo motor at the top of the first bracket, the lead screw connected to the power output end at the bottom thereof will perform axial rotation in the vertical direction. At this time, the entire driving assembly connected by the balance frame and the lead screw thread will perform reciprocating movement up and down in the vertical direction, thereby driving the stirring assembly connected to the bottom of the driving assembly to synchronously move up and down inside the reactor body. By using the above structure, it can be ensured to the greatest extent that the materials inside the reactor body can be fully mixed and stirred, and it can be ensured that the materials can react effectively and fully, thereby ensuring the reaction effect between the materials during the preparation of difluoroacetic anhydride. In addition, the use of the above structure, in conjunction with the high-power rotation provided by the operation of the AC motor, can avoid as much as possible the problem of insufficient reaction caused by the large resistance to mixing and stirring due to the reaction of the materials in the reactor body.

[0017] 2. The utility model adopts a structural setting that the stirring assembly is installed on the driving assembly and the scraper is attached to the inner wall surface of the reactor body. When the lifting assembly and the driving assembly are operated at the same time, the entire stirring assembly will rotate axially inside the reactor body and move up and down at the same time. At this time, the scraper attached to the inner wall of the reactor body will scrape along the inner surface of the reactor body as the fixed frame rotates. On the one hand, it can fully stir and mix the materials, and on the other hand, it can prevent the materials from sticking to the inner wall surface of the reactor body, so as to prevent part of the materials from sticking to the inner wall of the reactor body, resulting in insufficient reaction of the materials. At the same time, the use of the above structure can assist in the subsequent maintenance and cleaning operations, and effectively clean the inner wall of the reactor body, saving the troublesome and laborious human operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the side view structure of the support body of a reaction device for preparing difluoroacetic anhydride according to the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a driving component of a reaction device for preparing difluoroacetic anhydride according to the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of a lifting component of a reaction device for preparing difluoroacetic anhydride according to the utility model;

[0021] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of a stirring component of a reaction device for preparing difluoroacetic anhydride.

[0022] In the figure: 1. Reactor body; 2. Cover; 3. Drive assembly; 301. AC motor; 302. Transmission roller; 303. Balance frame; 304. Slider; 4. Lifting assembly; 401. First bracket; 402. Servo motor; 403. Lead screw; 404. Left bottom frame; 405. Second bracket; 406. Right bottom frame; 5. Stirring assembly; 501. Assembly sleeve; 502. Fixed frame; 503. Scraper; 504. Fastening bolts; 6. Discharge valve; 7. Auxiliary bracket. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] like Figures 1 to 4As shown, a reaction device for preparing difluoroacetic anhydride includes a reactor body 1 and a lifting component 4, a cover 2 is installed on the top of the reactor body 1, and a driving component 3 is mounted above the cover 2, the lifting component 4 is connected to the left and right sides of the driving component 3, and the bottom end of the driving component 3 is connected to the stirring component 5, the bottom of the reactor body 1 is symmetrically installed with a discharge valve 6, and the lower ends of the front and rear sides of the reactor body 1 are both installed with auxiliary brackets 7, the lifting component 4 includes a first bracket 401, a servo motor 402, a screw 403 and a left bottom frame 404, the servo motor 402 is installed on the top of the first bracket 401, and the screw 403 is installed at the bottom power output end of the servo motor 402 through a coupling, the left bottom frame 404 is installed at the bottom of the first bracket 401, and the lifting component 4 also includes a second bracket 405 and a right bottom frame 406 , the reactor body 1 is vertically provided with a second bracket 405 away from the first bracket 401, and a right bottom bracket 406 is installed at the bottom of the second bracket 405, the second bracket 405 and the first bracket 401 are vertically fixed on the left and right sides of the reactor body 1, and the slider 304 is slidingly connected to the second bracket 405 and the first bracket 401 respectively, and one end of the balance frame 303 is threadedly connected to the lead screw 403. Driven by the servo motor 402 at the top of the first bracket 401, the lead screw 403 connected to the power output end at its bottom will perform axial rotation in the vertical direction. At this time, the entire driving assembly 3 threadedly connected to the balance frame 303 and the lead screw 403 will reciprocate up and down in the vertical direction, thereby driving the stirring assembly 5 connected to the bottom of the driving assembly 3 to move up and down synchronously inside the reactor body 1.

[0025] like Figures 1 to 4As shown, the reactor body 1 and the cover 2 are connected by flanges, and the auxiliary bracket 7 is fixedly connected to the reactor body 1. The driving assembly 3 includes an AC motor 301, a transmission roller 302, a balancing frame 303 and a slider 304. The bottom power output end of the AC motor 301 is vertically installed with a transmission roller 302 through a coupling, and the left and right sides of the AC motor 301 are horizontally installed with balancing frames 303, and the end of the balancing frame 303 away from the AC motor 301 is installed with a slider 304. The auxiliary bracket 7, the right bottom frame 406 and the left bottom frame 404 have the same structure and are all welded to the reactor body 1. The transmission roller 302 passes through the center of the cover 2. The stirring assembly 5 includes an assembly sleeve 501, a fixing frame 502, Scraper 503 and fastening bolt 504, the side of the mounting sleeve 501 is horizontally connected with the fixing frame 502, and the scraper 503 is inserted inside the fixing frame 502, and the fastening bolt 504 is threadedly connected between the scraper 503 and the fixing frame 502, the fixing frame 502 is arranged in a circular array with the mounting sleeve 501 as the center, and the mounting sleeve 501 and the fixing frame 502 are fixedly connected. When the lifting component 4 and the driving component 3 operate simultaneously, the entire stirring component 5 will rotate axially inside the reactor body 1 and move up and down at the same time. At this time, the scraper 503 attached to the inner wall of the reactor body 1 will scrape along the inner surface of the reactor body 1 while rotating with the fixing frame 502, thereby playing a good cleaning role.

[0026] In summary, if Figures 1 to 4 As shown, when the reaction device for preparing difluoroacetic anhydride is used, the auxiliary support 7, the left bottom frame 404 and the right bottom frame 406 are first used to stably place the entire device on the ground, and then the materials that need to be mixed and reacted are added into the interior of the reactor body 1 one by one according to the situation, and the cover 2 is docked with the reactor body 1 and closed;

[0027] At this time, a chemical reaction will begin to occur inside the reactor body 1, and then the driving assembly 3 will start to operate, the AC motor 301 will drive the transmission roller 302 at the bottom to rotate axially, and at the same time, it will drive the stirring assembly 5 at the bottom of the transmission roller 302 to rotate vertically axially, and the fixed frame 502 connected to the transmission roller 302 by the assembly sleeve 501 is connected by the fastening bolts 504 to drive the scraper 503 inserted in the middle and make it scrape along the inner wall surface of the reactor body 1;

[0028] At the same time, the lifting component 4 will operate synchronously. Under the operation of the servo motor 402 on the top of the first bracket 401, the lead screw 403 connected to the bottom thereof will rotate axially with a synchronous delay, so that the entire stirring component 5 connected to the lead screw 403 through the balance frame 303 will move back and forth in the vertical direction along the surface of the lead screw 403, the first bracket 401 and the second bracket 405 using the slider 304, and the entire stirring component 5 will move up and down inside the reactor body 1, so that the material inside the reactor body 1 can be fully stirred. Finally, the reacted material only needs to be discharged using the discharge valve 6 at the bottom of the reactor body 1.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A reaction device for preparing difluoroacetic anhydride, comprising a reaction kettle body (1) and a lifting assembly (4), characterized in that: A cover (2) is installed on the top of the reactor body (1), and a driving assembly (3) is mounted above the cover (2); the lifting assembly (4) is connected to the left and right sides of the driving assembly (3), and the bottom end of the driving assembly (3) is connected to the stirring assembly (5); a discharge valve (6) is symmetrically installed on the bottom of the reactor body (1), and auxiliary brackets (7) are installed at the lower ends of the front and rear sides of the reactor body (1); the lifting assembly (4) comprises a first bracket (401), a servo motor (402), a lead screw (403) and a left bottom frame (404); the servo motor (402) is installed on the top of the first bracket (401), and the lead screw (403) is installed at the bottom power output end of the servo motor (402) through a coupling; and the left bottom frame (404) is installed at the bottom of the first bracket (401).

2. A reaction device for preparing difluoroacetic anhydride according to claim 1, characterized in that: The reactor body (1) and the cover (2) are connected by flanges, and the auxiliary bracket (7) is fixedly connected to the reactor body (1).

3. A reaction device for preparing difluoroacetic anhydride according to claim 1, characterized in that: The driving assembly (3) comprises an AC motor (301), a transmission roller (302), a balancing frame (303) and a slider (304); the transmission roller (302) is vertically mounted on the bottom power output end of the AC motor (301) via a coupling, and the balancing frames (303) are horizontally mounted on the left and right sides of the AC motor (301), and the slider (304) is mounted on one end of the balancing frame (303) away from the AC motor (301).

4. A reaction device for preparing difluoroacetic anhydride according to claim 3, characterized in that: The lifting assembly (4) further comprises a second bracket (405) and a right bottom bracket (406); the second bracket (405) is vertically arranged on the reactor body (1) away from the first bracket (401), and the right bottom bracket (406) is installed at the bottom of the second bracket (405).

5. A reaction device for preparing difluoroacetic anhydride according to claim 4, characterized in that: The auxiliary support (7), the right bottom frame (406) and the left bottom frame (404) have the same structure and are all connected to the reactor body (1) by welding. The transmission roller (302) passes through the center of the cover (2).

6. A reaction device for preparing difluoroacetic anhydride according to claim 4, characterized in that: The second bracket (405) and the first bracket (401) are both vertically fixed on the left and right sides of the reactor body (1), and the slider (304) is slidably connected to the second bracket (405) and the first bracket (401) respectively, and one end of the balance bracket (303) is threadedly connected to the lead screw (403).

7. A reaction device for preparing difluoroacetic anhydride according to claim 1, characterized in that: The stirring assembly (5) comprises an assembly sleeve (501), a fixing frame (502), a scraper (503) and a fastening bolt (504); the fixing frame (502) is horizontally connected to the side of the assembly sleeve (501), the scraper (503) is inserted inside the fixing frame (502), and the fastening bolt (504) is threadedly connected between the scraper (503) and the fixing frame (502).

8. A reaction device for preparing difluoroacetic anhydride according to claim 7, characterized in that: The fixing frames (502) are arranged in a circular array with the mounting sleeve (501) as the center, and the mounting sleeve (501) and the fixing frames (502) are fixedly connected.

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