A cold reaction kettle for producing pyrimidine

Abstract

The utility model relates to pyrimidine production field, concretely is a kind of cold reaction kettle of pyrimidine production, including the sealing mechanism for providing reaction space and the power mechanism for providing power, the power mechanism is installed on the sealing mechanism upper end, still include the mixing mechanism for the low-temperature raw material is stirred, the mixing mechanism is provided with three groups, and from top to bottom installation on the main shaft of power mechanism. By setting up mixing mechanism, utilize the cooperation of forward stirring vane and reverse stirring vane, when the concentration of raw material is high because of low temperature and flowability is bad, extrude between lower end fixed frame and upper end fixed frame and raw material, to extrude support spring shrink, make the tangential force of reverse stirring vane larger, and utilize the extrusion generated by shrink, promote the flowability of liquid to improve upwards, to promote the bottom low-temperature zone to transmit rapidly upwards, improve the transmission effect of temperature.

Description

Technical Field

[0001] This utility model relates to the field of pyrimidine production, and in particular to a cryogenic reaction vessel for pyrimidine production. Background Technology

[0002] The cryogenic reactor for pyrimidine production is essentially a closed reaction device with precise temperature control. Its core function is to provide a stable low-temperature environment for the chemical reactions that require low temperatures in pyrimidine synthesis. It typically consists of a reactor body, a refrigeration system, a stirring device, and a temperature monitoring and control system. It can precisely maintain the reaction system within a specific low-temperature range, ensuring the efficient progress of the pyrimidine synthesis reaction and the purity of the product.

[0003] In the prior art, compared with the Chinese utility model with announcement number CN221413098U, a cryogenic reactor for pyrimidine production is disclosed, which reduces the impact on the production process by improving heat dissipation. However, in this type of solution and similar cryogenic reactors, in order to avoid frictional heat accumulation during the stirring process, shear stirring is usually adopted. In addition, since external temperature control equipment is required, the raw material concentration will become thicker after cooling, which will increase the resistance of the stirring process, resulting in the bottom temperature being too cold and the temperature being uneven between the top and bottom, affecting the processing progress and processing quality. Summary of the Invention

[0004] The purpose of this invention is to provide a cryogenic reaction vessel for the production of pyrimidine in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions: A cryogenic reactor for pyrimidine production includes a sealing mechanism for providing a reaction space and a power mechanism for providing power, the power mechanism being installed on the upper end of the sealing mechanism. It also includes a mixing mechanism for stirring cryogenic raw materials, the mixing mechanism being provided in three sets and installed from top to bottom on the main shaft of the power mechanism. The mixing mechanism includes a lower fixed frame and an upper fixed frame. A power coupling cylinder is provided at the center of the inner side of the lower fixed frame, and a movable coupling cylinder is provided at the center of the inner side of the upper fixed frame. The lower fixed frame and the power coupling cylinder, as well as the upper fixed frame and the movable coupling cylinder, are connected by several positive stirring blades. A support spring is provided between the movable coupling cylinder and the power coupling cylinder. A reverse stirring blade is movably connected between the inner side of the lower fixing frame corresponding to the forward stirring blade and the inner side of the upper fixing frame corresponding to the forward stirring blade. The reverse stirring blade cooperates with the forward stirring blade through a mating assembly. The forward stirring blades connected to the upper and lower ends of the reverse stirring blade are staggered. The tilting direction of the forward stirring blade is opposite to that of the reverse stirring blade.

[0006] Preferably, the mating component is a ball-head structure, and the forward stirring blade is provided with a ball groove corresponding to the mating component.

[0007] Preferably, the movable mating sleeve is rotatably connected to the main shaft, and the power mating sleeve is slidably connected to the main shaft via a spline.

[0008] Preferably, the reverse stirring blade has an outer width greater than the inner width, with the line connecting the two mating components serving as the dividing line.

[0009] Preferably, the angle between the reverse stirring blade and the horizontal plane is in the range of 70°-40°.

[0010] Preferably, the cross-section of the forward stirring blade is a fan-shaped structure, and each group of the forward stirring blades has six blades.

[0011] Preferably, the lower end fixing frame has four anchor-shaped blades arranged in a circular array on its outer side, and the bottom of the main shaft is fixed with shear blades.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a mixing mechanism, and utilizing the cooperation of forward and reverse stirring blades, when the raw material becomes more concentrated and less fluid due to low temperature, the compression between the lower and upper fixed frames and the raw material causes the support spring to contract, increasing the tangential force of the reverse stirring blade. Furthermore, the compression generated by the contraction promotes the upward flow of the liquid, thereby promoting the rapid upward transfer of the low-temperature zone at the bottom and improving the temperature transfer effect. 2. After the high concentration is resolved, the support spring separates the lower and upper fixed frames, thereby causing the reverse stirring blades to reset, which draws the outer raw material into the inner side, thereby disrupting the annular laminar flow and improving the reaction effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0014] Figure 1 This is a schematic diagram of the structure of a cryogenic reaction vessel for the production of pyrimidine according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a cryogenic reactor for the production of pyrimidine according to this utility model; Figure 3 This is a schematic diagram of the mixing mechanism in the relaxed state of a cryogenic reactor for pyrimidine production according to this utility model; Figure 4 This is a schematic diagram of the mixing mechanism in a compressed state of a cryogenic reactor for pyrimidine production according to the present invention; Figure 5 This is a front view of the mixing mechanism of a cryogenic reactor for pyrimidine production according to this utility model in a relaxed state; Figure 6 This is a front view of the mixing mechanism in a compressed state of a cryogenic reactor for pyrimidine production according to this utility model; Figure 7 This is a cross-sectional view of the mixing mechanism of a cryogenic reactor for pyrimidine production according to the present invention; Figure 8 This is a schematic diagram of the reverse stirring blade structure of a cryogenic reactor for pyrimidine production according to the present invention; Figure 9 This is a diagram showing the proportion of reverse stirring blades in a cryogenic reactor for pyrimidine production according to this invention.

[0015] The annotations in the attached figures are explained as follows: 1. Sealing mechanism; 2. Power mechanism; 3. Mixing mechanism; 11. Cylinder; 12. Sealing cover; 13. Temperature control component; 21. Main shaft; 22. Shear blade; 31. Lower end fixing frame; 32. Upper end fixing frame; 33. Anchor blade; 34. Reverse stirring blade; 35. Matching assembly; 36. Forward stirring blade; 37. Movable matching cylinder; 38. Support spring; 39. Power matching cylinder. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-9 As shown, a cryogenic reactor for pyrimidine production includes a sealing mechanism 1 for providing reaction space and a power mechanism 2 for providing power. The power mechanism 2 is installed on the upper end of the sealing mechanism 1. It also includes a mixing mechanism 3 for stirring the cryogenic raw materials. The mixing mechanism 3 is provided in three sets and is installed on the main shaft 21 of the power mechanism 2 from top to bottom. The mixing mechanism 3 includes a lower fixed frame 31 and an upper fixed frame 32. A power coupling cylinder 39 is provided at the center of the inner side of the lower fixed frame 31, and a movable coupling cylinder 37 is provided at the center of the inner side of the upper fixed frame 32. The lower fixed frame 31 and the power coupling cylinder 39, and the upper fixed frame 32 and the movable coupling cylinder 37 are connected by several positive stirring blades 36. A support spring 38 is provided between the movable coupling cylinder 37 and the power coupling cylinder 39. A reverse stirring blade 34 is movably connected between the inner side of the lower fixed frame 31 corresponding to the forward stirring blade 36 and the inner side of the upper fixed frame 32 corresponding to the forward stirring blade 36. The reverse stirring blade 34 cooperates with the forward stirring blade 36 through the mating component 35. The forward stirring blade 36 connected to the upper and lower ends of the reverse stirring blade 34 is staggered, and the tilting direction of the forward stirring blade 36 is opposite to that of the reverse stirring blade 34.

[0019] Preferably, the mating component 35 has a ball head structure, and the forward stirring blade 36 is provided with a ball groove corresponding to the mating component 35. The ball head structure provides mating space when the reverse stirring blade 34 flips and shrinks.

[0020] In this embodiment, the movable mating cylinder 37 is rotatably connected to the main shaft 21, and the power mating cylinder 39 is slidably connected to the main shaft 21 via a spline. The power mating cylinder 39 is the active rotating component, and the power mating cylinder 37 is the passive rotating component, so that the raw material concentration can be alternately changed.

[0021] In this embodiment, the reverse stirring blade 34 is divided by the line connecting the two mating components 35. The outer width is greater than the inner width, the outer side has a higher specific gravity, and the inner side has a lower specific gravity. When deformation occurs due to high-concentration raw materials, the cutting direction is more in line with the raw materials.

[0022] In this embodiment, the angle between the reverse stirring blade 34 and the horizontal plane is in the range of 70°-40°.

[0023] In this embodiment, the cross-section of the forward stirring blade 36 is a fan-shaped structure, and each group of forward stirring blades 36 has six blades.

[0024] In this embodiment, four anchor-shaped blades 33 are arranged in a circular array on the outer side of the lower fixing frame 31, and shear blades 22 are fixedly connected to the bottom of the main shaft 21.

[0025] Working principle: The top of the main shaft 21 is connected to the motor via the sealing cover 12. The motor at the top drives the main shaft 21 to rotate clockwise when viewed from above. This rotation drives the mixing mechanism 3 inside the cylinder 11, thereby stirring and mixing the raw materials inside the cylinder 11. Since the temperature control element 13, i.e., the spiral tube, is infused with a low-temperature liquid, the temperature inside the cylinder 11 is controlled. At this time, because the main shaft 21 is keyed to the movable mating cylinder 37, which is the active rotating element, the forward stirring blade 36 inside the lower fixed frame 31 rotates. Then, the reverse stirring blade 34 drives the forward stirring blade 36 inside the lower fixed frame 31, thereby stirring and mixing the raw materials. In addition, the anchor-shaped blades 33 on the outside of the lower fixed frame 31 further enhance the degree of disorder of the raw materials. When the concentration of raw materials at the bottom increases due to low temperature, the resistance of the forward stirring blade 36 inside the lower fixed frame 31 increases. Simultaneously, the resistance of the forward stirring blade 36 inside the upper fixed frame 32 also increases. This causes the forward stirring blade 36 at the top to be compressed, and since the power coupling cylinder 37 at the bottom is interactively connected, the power coupling cylinder 39 at the top will compress the support spring 38 downwards. At this time, the reverse stirring blade 34 is compressed and flipped, causing the support spring 38 to contract. This increases the tangential force of the reverse stirring blade 34, and the compression generated by the contraction promotes increased upward fluidity of the liquid, thereby accelerating the upward transport of the low-temperature zone at the bottom, improving the temperature transfer effect, and thus improving the processing of the low-temperature raw materials at the bottom. By compressing the low-temperature zone at the bottom upwards and compressing the slightly higher-temperature raw materials at the top downwards, the reaction efficiency is improved.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cryogenic reactor for pyrimidine production, comprising a sealing mechanism (1) for providing a reaction space and a power mechanism (2) for providing power, said power mechanism (2) being mounted on the upper end of said sealing mechanism (1), characterized in that: It also includes a mixing mechanism (3) for stirring low-temperature raw materials, wherein the mixing mechanism (3) is provided in three sets and is installed from top to bottom on the main shaft (21) of the power mechanism (2); The mixing mechanism (3) includes a lower fixed frame (31) and an upper fixed frame (32). A power coupling cylinder (39) is provided at the center of the inner side of the lower fixed frame (31), and a movable coupling cylinder (37) is provided at the center of the inner side of the upper fixed frame (32). The lower fixed frame (31) and the power coupling cylinder (39), and the upper fixed frame (32) and the movable coupling cylinder (37) are connected by several positive stirring blades (36). A support spring (38) is provided between the movable coupling cylinder (37) and the power coupling cylinder (39). A reverse stirring blade (34) is movably connected between the inner side of the lower fixing frame (31) corresponding to the forward stirring blade (36) and the inner side of the upper fixing frame (32) corresponding to the forward stirring blade (36). The reverse stirring blade (34) is engaged with the forward stirring blade (36) through a mating assembly (35). The forward stirring blade (36) connected to the upper and lower ends of the reverse stirring blade (34) is misaligned. The tilting direction of the forward stirring blade (36) is opposite to that of the reverse stirring blade (34).

2. The cryogenic reactor for pyrimidine production according to claim 1, characterized in that: The mating component (35) has a ball head structure, and the forward stirring blade (36) is provided with a ball groove corresponding to the mating component (35).

3. The cryogenic reactor for pyrimidine production according to claim 2, characterized in that: The movable fitting sleeve (37) is rotatably connected to the main shaft (21), and the power fitting sleeve (39) is slidably connected to the main shaft (21) via a spline.

4. The cryogenic reactor for pyrimidine production according to claim 3, characterized in that: The reverse stirring blade (34) is divided by the line connecting the two mating components (35), with the outer width being greater than the inner width.

5. A cryogenic reactor for pyrimidine production according to claim 4, characterized in that: The angle between the reverse stirring blade (34) and the horizontal plane is in the range of 70°-40°.

6. A cryogenic reactor for pyrimidine production according to claim 5, characterized in that: The cross-section of the forward stirring blade (36) is a fan-shaped structure, and each group of the forward stirring blades (36) has six blades.

7. A cryogenic reactor for pyrimidine production according to claim 1, characterized in that: The lower end fixing frame (31) is provided with four anchor-type blades (33) arranged in a circular array on the outside, and the bottom of the main shaft (21) is fixed with shear blades (22).

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