Stirring device for compound preparation

Abstract

The utility model relates to the technical field of compound preparation, in particular to a stirring device for compound preparation, which comprises a stirring mechanism and a filtering mechanism. A cooling pipe in the stirring mechanism cools a stirring barrel to crystallize a crude product, a motor drives a stirring rod to rotate to stir the crude product in the cooling process, and the stirring rod drives a scraping frame to rotate so as to scrape off crystallized solids on the inner wall of the stirring barrel, so that the acting effect of the cooling pipe on the crude product is improved; the stirring barrel is controlled to be opened through the drawing door to discharge crystallized solids and filtrate generated by cooling and stirring of the crude product, the crystallized solids and the filtrate generated by cooling and stirring of the crude product are separated through the filter plate in the filter mechanism, and the filtered crystallized solids are taken out in time through the drawing frame to enter the next step for preparation. A closed space is formed between the filter box and the liquid collecting cylinder through the sealing plug, and compressed air is introduced through the vacuum generator to generate negative pressure in the liquid collecting cylinder, so that the speed of filtrate passing through the filter plate is accelerated, and the filtering time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of compound preparation, in particular to a stirring device for compound preparation. Background Art

[0002] Fluorinated pesticides have experienced rapid development over the past decade and have become a key focus of the global pesticide industry. 2,3-Difluoro-5-chloropyridine is a key intermediate in the synthesis of the highly effective pesticide clodinafop-butyl. It significantly enhances the pesticide's activity, boasting advantages such as low dosage, low toxicity, high efficacy, and robust metabolism. This has led to its increasing proportion among new pesticides. However, the preparation of 2,3-Difluoro-5-chloropyridine requires multiple steps, including cooling the crude product, stirring, filtering, and mixing the resulting crystalline solid with the filtrate.

[0003] A search of the patent document with the publication number CN220257748U shows that the output shaft of the stirring motor in the stirring assembly drives the rotating shaft and the stirring blades to rotate, thereby stirring the fluorine-containing compound inside the stirring box. The two sets of connecting plates on the outer wall of the bottom of the rotating shaft drive the bottom scrapers thereof to stir the fluorine-containing compound on the conical bottom surface of the stirring box. At the same time, the two sets of scrapers can scrape off the residual fluorine-containing compound on the conical bottom surface of the stirring box, thereby preventing the residual fluorine-containing compound on the conical bottom surface of the stirring box when the material is discharged from the discharge pipe. The invention has the advantages of uniform stirring and convenient discharge.

[0004] This patent document uses two sets of scrapers to scrape off the fluorine-containing compounds remaining on the conical bottom surface of the mixing box. However, during the cooling and stirring process, crystalline solids are likely to accumulate on the inner wall of the mixing drum, affecting the cooling and crystallization effect of the crude product. After the crude product is cooled and stirred, it is necessary to filter and separate the crystals and filtrate for the next processing and preparation. Utility Model Content

[0005] The purpose of the present invention is to provide a stirring device for compound preparation in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A stirring device for compound preparation, comprising a stirring mechanism and a filtering mechanism;

[0008] The mixing mechanism includes a mixing drum, a mixing rod is connected to the mixing drum for rotation, a scraper frame is fixed to the outside of the mixing rod, a scraper is fixed to the scraper frame near the inner wall of the mixing drum, a motor is fixed to the input end of the mixing rod, a cooling pipe is fixed to the outside of the mixing drum, and a drawer door is slidably connected to the bottom of the mixing drum;

[0009] The filtering mechanism includes a filter box, which is connected to the bottom of the mixing drum. A pull-out frame is slidably connected inside the filter box, a filter plate is fixed to the bottom of the pull-out frame, a liquid collecting cylinder is provided at the bottom of the filter box, a sealing plug is provided between the bottom of the filter box and the liquid collecting cylinder, and a vacuum generator is provided on one side of the liquid collecting cylinder.

[0010] Preferably, two supporting legs are fixed on the front and rear sides of the mixing drum, and a feed pipe is connected to the top of the mixing drum.

[0011] Preferably, a discharge chute for sliding the drawer door is provided at the bottom of the mixing drum, a door hole for passing the drawer door is provided on one side of the mixing drum, and a first handle is fixed on one side of the drawer door.

[0012] Preferably, five first vertical plates for stirring the coarse product are fixed at equal distances on the stirring rod, and six pairs of second vertical plates for stirring the coarse product are fixed at equal distances on the inner side of the scraping frame.

[0013] Preferably, a frame hole for allowing the pull-out frame to pass through is opened on one side of the filter box, and a second handle is fixed on one side of the pull-out frame.

[0014] Preferably, the filter box is funnel-shaped, and an air outlet pipe is connected between one side of the liquid collecting cylinder and the vacuum generator.

[0015] The beneficial effects compared with the existing technology are as follows: the mixing drum is cooled by the cooling tube in the stirring mechanism to crystallize the crude product, the stirring rod is driven by the motor to rotate to stir the crude product during the cooling process, the scraping frame is driven by the stirring rod to rotate and the crystalline solids on the inner wall of the mixing drum are scraped off, thereby improving the effect of the cooling tube on the crude product, the mixing drum is controlled to open by the pull-out door to discharge the crystalline solids and filtrate produced by the cooling and stirring of the crude product, the crystalline solids and filtrate produced by the cooling and stirring of the crude product are separated by the filter plate in the filtering mechanism, the filtered crystalline solids are taken out in time by the pull-out frame and entered into the next preparation step, a closed space is formed between the filter box and the liquid collecting cylinder by the sealing plug, compressed air is introduced into the liquid collecting cylinder through the vacuum generator to generate negative pressure, accelerate the speed of the filtrate passing through the filter plate, and shorten the filtration time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a stirring device for compound preparation according to the present invention;

[0018] Figure 2This is a cross-sectional view of a stirring device for compound preparation according to the present invention;

[0019] Figure 3 This is a schematic diagram of the stirring mechanism structure of a stirring device for compound preparation according to the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the filtering mechanism of a stirring device for compound preparation according to the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of a drawer door of a stirring device for compound preparation according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a stirring rod of a stirring device for compound preparation according to the present invention;

[0023] Figure 7 This is a schematic diagram of the pull-out frame structure of a stirring device for compound preparation according to the present invention;

[0024] Figure 8 The utility model is a schematic diagram of the structure of a liquid collecting cylinder of a stirring device for compound preparation.

[0025] The following are the descriptions of the reference numerals:

[0026] 1. Stirring mechanism; 101. Stirring drum; 102. Stirring rod; 103. Scraping frame; 104. Motor; 105. Sliding door; 106. Cooling pipe; 2. Filtering mechanism; 201. Filter box; 202. Sliding frame; 203. Filter plate; 204. Liquid collecting cylinder; 205. Sealing plug; 206. Vacuum generator. DETAILED DESCRIPTION

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-8 As shown, a stirring device for compound preparation includes a stirring mechanism 1 and a filtering mechanism 2.

[0030] In this embodiment: the stirring mechanism 1 includes a stirring drum 101, two supporting legs are fixed on the front and rear sides of the stirring drum 101, a feeding pipe is connected to the top of the stirring drum 101, a stirring rod 102 is rotatably connected to the stirring drum 101, a scraping frame 103 is fixed to the outside of the stirring rod 102, a scraper is fixed to the side of the scraping frame 103 close to the inner wall of the stirring drum 101, five first vertical plates for stirring the coarse product are fixed at equal distances on the stirring rod 102, six pairs of second vertical plates for stirring the coarse product are fixed at equal distances on the inside of the scraping frame 103, a motor 104 is fixed to the input end of the stirring rod 102, a cooling pipe 106 is fixed to the outside of the stirring drum 101, and the stirring drum 101 A drawer door 105 is slidably connected to the bottom, and a discharge trough is provided at the bottom of the mixing drum 101 for the drawer door 105 to slide inside. A door hole is provided on one side of the mixing drum 101 for the drawer door 105 to pass through. A first handle is fixed on one side of the drawer door 105. The mixing drum 101 is cooled by a cooling tube 106 to crystallize the crude product. The stirring rod 102 is driven to rotate by a motor 104 to stir the crude product during the cooling process. The scraper frame 103 is driven to rotate by the stirring rod 102 to scrape off the crystalline solid on the inner wall of the mixing drum 101. The mixing drum 101 is controlled to open by the drawer door 105 to discharge the crystalline solid and filtrate produced by the cooling and stirring of the crude product.

[0031] In this embodiment, the filtering mechanism 2 includes a filter box 201, which is funnel-shaped. The filter box 201 is connected to the bottom of the mixing drum 101. A pull-out frame 202 is slidably connected to the filter box 201. A frame hole for passing the pull-out frame 202 is opened on one side of the filter box 201. A second handle is fixed on one side of the pull-out frame 202. A filter plate 203 is fixed to the bottom of the pull-out frame 202. A liquid collecting cylinder 204 is provided at the bottom of the filter box 201. A filter plate 203 is fixed to the bottom of the pull-out frame 202. A liquid collecting cylinder 204 is provided at the bottom of the filter box 201. A filter plate 203 is fixed to the bottom of the pull-out frame 202. There is a sealing plug 205, and a vacuum generator 206 is provided on one side of the liquid collecting cylinder 204. An air outlet pipe is connected between one side of the liquid collecting cylinder 204 and the vacuum generator 206. The crystalline solid and the filtrate generated by cooling and stirring the crude product are separated through the filter plate 203, and the filtered crystalline solid is taken out in time through the pull-out frame 202. The sealing plug 205 forms a closed space between the filter box 201 and the liquid collecting cylinder 204, and compressed air is introduced through the vacuum generator 206 to generate negative pressure in the liquid collecting cylinder 204.

[0032] Working principle: Pour the crude product from the feed pipe into the mixing drum 101, start the cooling pipe 106 to cool the mixing drum 101 to crystallize the crude product, start the motor 104 to drive the stirring rod 102 to rotate and then drive the scraper frame 103 to rotate, the first vertical plate on the stirring rod 102 and the second vertical plate inside the scraper frame 103 stir the crude product, and the crude product generates crystalline solids and filtrate during cooling and stirring. The scraper frame 103 rotates to scrape off the crystalline solids on the inner wall of the mixing drum 101. After the crystallization reaction is completed, pull the first handle to one side to move the drawer door 105 to one side so that the bottom of the mixing drum 101 is controlled to open and the crystalline solids and filtrate generated by cooling and stirring the crude product are discharged into the filter box 201, and push the first handle to the other side. The pull-out door 105 is moved to the other side and reset so that the bottom of the mixing drum 101 is controlled to be closed for the preparation of the next batch of crude products. The crystalline solid and the filtrate fall on the filter plate 203. The sealing plug 205 forms a closed space between the filter box 201 and the liquid collecting cylinder 204. The vacuum generator 206 introduces compressed air to generate negative pressure in the liquid collecting cylinder 204, which accelerates the separation of the crystalline solid and the filtrate by the filter plate 203. The filtered crystalline solid remains in the pull-out frame 202, and the filtered filtrate flows into the liquid collecting cylinder 204. The second handle is pulled to one side to move the pull-out frame 202 to one side to take out the crystalline solid. The second handle is pushed to the other side to move the pull-out frame 202 to the other side and reset to filter the next batch of crystalline solid and filtrate.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A stirring device for compound preparation, characterized in that: It includes a stirring mechanism (1) and a filtering mechanism (2); The stirring mechanism (1) comprises a stirring drum (101), a stirring rod (102) is rotatably connected to the inside of the stirring drum (101), a scraping frame (103) is fixed to the outside of the stirring rod (102), a scraper is fixed to the scraping frame (103) on the side close to the inner wall of the stirring drum (101), a motor (104) is fixed to the input end of the stirring rod (102), a cooling pipe (106) is fixed to the outside of the stirring drum (101), and a drawer door (105) is slidably connected to the bottom of the stirring drum (101); The filtering mechanism (2) comprises a filter box (201), the filter box (201) is in communication with the bottom of the mixing drum (101), a pull-out frame (202) is slidably connected in the filter box (201), a filter plate (203) is fixed to the bottom of the pull-out frame (202), a liquid collecting cylinder (204) is provided at the bottom of the filter box (201), a sealing plug (205) is provided between the bottom of the filter box (201) and the liquid collecting cylinder (204), and a vacuum generator (206) is provided on one side of the liquid collecting cylinder (204).

2. A stirring device for compound preparation according to claim 1, characterized in that: Two supporting legs are fixed on both the front and rear sides of the mixing drum (101), and a feed pipe is connected to the top of the mixing drum (101).

3. The stirring device for compound preparation according to claim 1, characterized in that: A discharge trough for the drawer door (105) to slide inside is provided at the bottom of the mixing drum (101), a door hole for the drawer door (105) to pass through is provided on one side of the mixing drum (101), and a first handle is fixed on one side of the drawer door (105).

4. The stirring device for compound preparation according to claim 1, characterized in that: Five first vertical plates for stirring the coarse product are fixed at equal distances on the stirring rod (102), and six pairs of second vertical plates for stirring the coarse product are fixed at equal distances on the inside of the scraping frame (103).

5. The stirring device for compound preparation according to claim 1, characterized in that: A frame hole for allowing the pull-out frame (202) to pass through is provided on one side of the filter box (201), and a second handle is fixed on one side of the pull-out frame (202).

6. The stirring device for compound preparation according to claim 1, characterized in that: The filter box (201) is funnel-shaped, and an air outlet pipe is connected between one side of the liquid collecting cylinder (204) and the vacuum generator (206).

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