Production device of trifluoromethylpyrimidine

Abstract

The utility model relates to a production device of trifluoromethylpyrimidine. The production device comprises a heat exchange cylinder, wherein the heat exchange cylinder comprises a lower ring body which is fixedly connected with a reaction kettle through a plurality of first connecting ends and a plurality of second connecting ends which are distributed at intervals around the circumference. And a multi-step through hole is formed on the reaction kettle and at the position where the two connecting ends are arranged. And a threaded counter bore I which is correspondingly matched with the multi-step through hole and is internally provided with a convex column is formed in the lower ring body. The first connecting end comprises a first stud with a shaft hole. The second connecting end comprises a second stud. An external thread surface and an axial convex ring are respectively formed at one end of each stud; the external thread surfaces are matched with the threaded counter bores I; and the convex columns are inserted into the axial convex rings. And a through hole structure capable of communicating the ring cavity on the lower ring body with the shaft hole is formed on the convex column correspondingly matched with the first stud. And a sealing structure is arranged between the opposite circumferential surfaces of the stud and the multi-step through hole. The assembly and disassembly operation between the lower part of the heat exchange cylinder and the reaction kettle can be quickly realized, and the efficiency of the assembly and disassembly operation is favorably improved.

Description

Technical Field

[0001] This utility model relates to a production apparatus for trifluoromethylpyrimidine. Background Technology

[0002] Trifluoromethylpyrimidine compounds have wide applications in pharmaceuticals, pesticides, and materials science. Common synthetic methods include the reaction of halopyrimidines with trifluoromethyl reagents, fluorination of pyrimidine derivatives, and cyclization reactions. Cyclization reactions may require high temperatures (80℃~150℃) to promote the cyclization process; therefore, reaction vessels are typically equipped with temperature control systems. To ensure optimal heat exchange in the reaction vessel, scale buildup on the heat exchange tubes / plates needs to be removed periodically. Traditional heat exchange tube cooling structures, due to their fixed connection to the vessel wall, are difficult to disassemble, hindering scale removal, severely limiting operational efficiency, and increasing overall costs. The applicant has innovatively designed a cylindrical heat exchange structure, such as... Figure 6 As shown, the heat exchanger 200 of this cylindrical heat exchanger structure includes an upper ring 10 and a lower ring 20 arranged alternately, and multiple fins 30 connected between the two rings, with the fins 30 distributed alternately around the circumference. Channels communicating with annular cavities on the two rings are formed within the fins 30. Cold water enters the upper ring 10 through the liquid delivery pipe 11 and flows distributed to the cavities of each fin 30 for cooling and heat exchange. Finally, it collects in the cavity of the lower ring 20 and is discharged outside the reactor 100 through the drain pipe 21, entering the external circulation system. After being cooled, it again flows from the upper ring 10 to each fin 30, and after heat exchange, flows from the fins 30 to the lower ring 20 and is discharged to the outside, thus repeating the cycle. The fins 30 have an elliptical cross-section and are spindle-shaped along their length, i.e., the fins 30 are strip-shaped plates that are wider in the middle and narrower at both ends. The upper ring 10 is fixedly installed at the upper port of the reactor 100, and the lower ring 20 is fixed in the lower part of the inner cavity of the reactor 100. This application aims to design a fixed connection structure applicable to the lower ring 20 located at the lower part and the reactor 100, in order to achieve the purpose of quick assembly and disassembly and improve work efficiency. Utility Model Content

[0003] To achieve the above objectives, this utility model provides a trifluoromethylpyrimidine production apparatus that can quickly assemble and disassemble the lower part of the heat exchange cylinder with the reaction vessel, which helps to quickly complete the fixing of the heat exchange cylinder and the connection with the circulation pipeline, thereby improving the efficiency of the assembly and disassembly operations.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a trifluoromethylpyrimidine production apparatus, including a heat exchange cylinder fixed in a reactor. The heat exchange cylinder includes an upper ring body, a lower ring body, and multiple fins connected between the two ring bodies, with the multiple fins arranged alternately around the circumference. The upper ring body is fixed near the upper port of the reactor, and the lower ring body is fixed at the lower part of the reactor and close to the inner bottom surface of the reactor. The vertical cavities formed in the fins can connect the annular cavities formed in the upper ring body and the annular cavities formed in the lower ring body, thereby distributing the coolant injected into the upper ring body through the liquid delivery pipe to each fin, flowing into the lower ring body, and finally being discharged to the outside through the liquid discharge pipe, forming a heat exchange and cooling circulation path.

[0005] The lower ring body is fixedly connected to the reactor via multiple first connecting ends and multiple second connecting ends, with the first and second connecting ends arranged alternately around the circumference. This can be a case where the first and second connecting ends are alternately distributed in the circumferential direction; or a case where the first connecting ends are evenly distributed around the circumference, with at least one second connecting end between any two adjacent first connecting ends. Generally, the number of second connecting ends exceeds the number of first connecting ends.

[0006] On the wall of the reactor, multi-stage through holes are formed at the positions corresponding to the first and second connecting ends; correspondingly, threaded countersunk holes are formed on the wall of the lower ring body, each matching one-to-one with the multi-stage through holes. A protrusion is formed on the inner bottom of the threaded countersunk hole, and the end face of the protrusion is contracted inward relative to the port of the threaded countersunk hole.

[0007] The first connecting end includes a first stud with a shaft hole formed thereon. The second connecting end includes a second stud. An external threaded surface is formed at one end of the outer circumferential surface of the first stud, and an axial protruding ring is formed on the bottom surface of the countersunk groove formed on that end face. The inner cavity of the axial protruding ring is axially connected to the shaft hole. An external threaded surface is formed at one end of the outer circumferential surface of the second stud, and an axial protruding ring is formed on the bottom surface of the countersunk groove formed on that end face.

[0008] Multiple external thread surfaces one and multiple external thread surfaces two are respectively matched with each threaded countersunk hole one; at that time, each protrusion can be inserted into the axial protrusion ring one and the axial protrusion ring two respectively. That is, the external thread surface one on each of the first bolts can be matched with a portion of the threaded countersunk hole one, and the protrusion in that portion of the threaded countersunk hole one can be inserted into the axial protrusion ring one; the external thread surface two on each of the second bolts can be matched with the remaining portion of the threaded countersunk hole one, and the protrusion in that remaining portion of the threaded countersunk hole one can be inserted into the axial protrusion ring two.

[0009] A through-hole structure is formed on the protrusion that corresponds to and matches the first stud, and the through-hole structure can connect the annular cavity on the lower ring body and the shaft hole on the first stud, so that the annular cavity on the lower ring body can be connected to the drain pipe through the first stud.

[0010] Sealing structures are provided between the opposing circumferential surfaces of the first stud and the multi-stage through hole, and between the opposing circumferential surfaces of the second stud and the multi-stage through hole. The sealing structure can be an annular groove structure equipped with a sealing ring.

[0011] Optionally, the sealing structure includes a sleeve and a threaded barrel. Correspondingly, a smooth cylindrical section is formed at the inner end of the multi-stage through hole, and a threaded section is formed at the outer end. The inner diameter of the threaded section is larger than the inner diameter of other parts of the multi-stage through hole.

[0012] A cylindrical surface is formed at one end of the outer circumferential surface of the first stud and at the other end of the outer circumferential surface of the second stud. A sleeve and a screw barrel disposed on the first stud can be fitted onto its cylindrical surface, and a sleeve and a screw barrel disposed on the second stud can be fitted onto its cylindrical surface. The inner diameter of the screw barrel is the same as the outer diameter of the cylindrical surface, and the inner diameter of the sleeve is larger than the outer diameter of the cylindrical surface.

[0013] A sealing ring portion three, matching the cylindrical surface, is provided on the inner circumferential surface of the screw barrel. The screw barrel can be screwed into the threaded hole section. An end countersunk hole is formed on the end of the screw barrel facing the sleeve.

[0014] The end of the sleeve can extend into the end countersunk hole, and a sealing ring part 2 is provided on the outer circumferential surface of the sleeve that matches the inner circumferential surface of the end countersunk hole.

[0015] The outer diameter of the sleeve matches the inner diameter of the light column bore section, allowing the sleeve to extend into the light column bore section. A sealing ring portion corresponding to the light column bore section is provided on the outer circumferential surface of the sleeve.

[0016] Optionally, an elastic ring is fixedly provided at the inner end of the sleeve, and the outer diameter of the elastic ring is not greater than the inner diameter of the bore section. The elastic ring is required to have a certain axial extension length.

[0017] Optionally, a countersunk hole one is formed at the inner end of the multi-stage through hole, and the countersunk hole one is formed as a tapered countersunk hole with the larger diameter end facing inward. The inner diameter of the countersunk hole one is larger than the inner diameter of the smooth cylindrical hole section. A countersunk hole two is formed at the end of the threaded countersunk hole one, and the countersunk hole two is formed as a tapered countersunk hole with the larger diameter end facing inward. The inner diameter of the countersunk hole two is larger than the inner diameter of the smooth cylindrical hole section.

[0018] Optionally, a shoulder is formed on the outer peripheral surface of the first stud at the position where the external thread surface one connects with the smooth cylindrical surface; a shoulder is also formed on the outer peripheral surface of the second stud at the position where the external thread surface two connects with the smooth cylindrical surface. The end face of the shoulder is formed as a conical surface, and the small diameter end of the conical surface faces one side of the external thread surface or faces both sides of the external thread surface.

[0019] A radial flange in the shape of an annulus is formed on the inner wall of the sleeve, and the end face of the radial flange near the screw cylinder is formed into a conical surface, with the small diameter end of the conical surface facing the screw cylinder.

[0020] The tapered surface of the shoulder can contact the tapered surface of the radial flange, allowing the first stud and the second stud to push the sleeve to move synchronously.

[0021] The beneficial effects of this utility model are: this utility model can quickly realize the assembly and disassembly of the lower part of the heat exchange cylinder and the reactor, which helps to quickly complete the fixing of the heat exchange cylinder and the connection with the circulation pipeline, and improves the efficiency of the assembly and disassembly operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of this application.

[0023] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0024] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point C.

[0025] Figure 4 This is a schematic diagram showing the corresponding split structure between the first connecting end, the reactor, and the lower ring body.

[0026] Figure 5 for Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0027] Figure 6 This is a schematic diagram of the structure when this application is assembled with the reactor.

[0028] In the diagram: 100 Reactor, 101 Inner protrusion, 102 Multi-stage through hole, 1021 Smooth column section, 10211 Countersunk hole one, 1022 Threaded section; 200 Heat exchanger cylinder; 10 Upper ring, 11 Liquid delivery pipe; 20 Lower ring, 21 Liquid discharge pipe, 22 Outer protrusion, 221 Threaded countersunk hole one, 2211 Countersunk hole two, 222 Protruding post; 30 Fin; 40 First connecting end, 41 First stud, 411 Shaft hole, 411 1. Threaded countersunk hole 2; 412. External threaded surface 1; 413. Axial convex ring 1; 414. Cylindrical surface 1; 415. Shoulder; 50. Second connecting end; 51. Second stud; 511. External threaded surface 2; 512. Axial convex ring 2; 513. Cylindrical surface 2; 60. Sleeve; 61. Elastic ring body; 62. Radial flange; 63. Sealing ring part 1; 64. Sealing ring part 2; 70. Screw; 71. External threaded surface 3; 72. End countersunk hole; 73. Sealing ring part 3. Detailed Implementation

[0029] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0030] like Figures 1 to 6 The apparatus shown is for the production of trifluoromethylpyrimidine, including a heat exchange cylinder 200 fixed in a reactor 100. The heat exchange cylinder 200 includes an upper ring body 10, a lower ring body 20, and a plurality of fins 30 connected between the two ring bodies, with the fins 30 arranged alternately around the circumference. The upper ring body 10 is fixed near the upper port of the reactor 100, and the lower ring body 20 extends into the cavity of the reactor 100 and is fixed to the lower part of the reactor 100, near the upper part of the inner bottom surface of the reactor 100. Vertical channels are formed within the fins 30, allowing the fins 30 to connect the annular cavities in the upper ring body 10 and the lower ring body 20. This allows the coolant / cold water injected into the upper ring body 10 via a liquid delivery pipe 11 to be evenly distributed to each fin 30, flowing into the lower ring body 20, and finally discharged to the outside via a drain pipe 21, forming a circulating path for heat exchange and cooling. The foregoing content is not part of the core technology or the main problem addressed in this application, and therefore will not be elaborated upon.

[0031] In this application, the lower ring body 20 and the reactor 100 are fixedly connected together by a plurality of first connecting ends 40 and a plurality of second connecting ends 50 arranged alternately around the circumference.

[0032] On the wall of the reactor 100, multi-stage through holes 102 are formed at positions corresponding to the first connecting end 40 and the second connecting end 50, respectively. The number of multi-stage through holes 102 is the sum of the number of the first connecting ends 40 and the number of the second connecting ends 50. Correspondingly, threaded countersunk holes 221 are formed on the wall of the lower ring body 20, each corresponding to one of the multi-stage through holes 102. A protrusion 222 is formed on the inner bottom of the threaded countersunk hole 221, with the end face of the protrusion 222 contracting inward relative to the port of the threaded countersunk hole 221.

[0033] The first connecting end 40 includes a first stud 41, and a shaft hole 411 is formed on the first stud 41. The second connecting end 50 includes a second stud 51. An external threaded surface 412 is formed at one end of the outer peripheral surface of the first stud 41, and an axial protruding ring 413 is formed on the bottom surface of the countersunk groove formed on the end face. An external threaded surface 511 is formed at one end of the outer peripheral surface of the second stud 51, and an axial protruding ring 512 is formed on the bottom surface of the countersunk groove formed on the end face.

[0034] The external thread surface 412 and the external thread surface 511 are respectively matched with each of the thread countersunk holes 221; at that time, the protrusions 222 formed in each of the thread countersunk holes 221 can be inserted into each of the axial protrusions 413 and each of the axial protrusions 512 respectively.

[0035] A through-hole structure is formed on the protrusion 222 corresponding to the first stud 41, and this through-hole structure can connect the annular cavity on the lower ring body 20 and the shaft hole 411 on the first stud 41, so that the annular cavity on the lower ring body 20 can be connected / communicated with the drain pipe 21 through the first stud 41. A rotary joint can be configured between the first stud 41 and the drain pipe 21 to connect the first stud 41 and the drain pipe 21. Specifically, a threaded countersunk hole 4111 can be provided at one end of the shaft hole 411 of the first stud 41, so that one end of the rotary joint is connected to the threaded countersunk hole 4111, and the other end of the rotary joint is connected to the drain pipe 21. In addition, no through-hole structure is formed on the protrusion 222 corresponding to the second stud 51. Therefore, the matching between the first bolt 41 and the threaded countersunk hole 221 and the protrusion 222 can both fix the lower ring body 20 and the reactor 100 and connect the annular cavity on the lower ring body 20 with the drain pipe 21; the matching between the second bolt 51 and the threaded countersunk hole 221 and the protrusion 222 can only fix the lower ring body 20 and the reactor 100.

[0036] The first stud 41 passes through the multi-stage through hole 102 and matches the threaded countersunk hole 221, and a sealing structure is provided between the opposite circumferential surfaces of the first stud 41 and the multi-stage through hole 102. The second stud 51 passes through the multi-stage through hole 102 and matches the threaded countersunk hole 221, and a sealing structure is provided between the second stud 51 and the opposite circumferential surfaces of the multi-stage through hole 102.

[0037] The sealing structure between the first stud 41 and the opposite circumferential surface of the multi-stage through hole 102, and the sealing structure between the second stud 51 and the opposite circumferential surface of the multi-stage through hole 102, both include a sleeve 60 and a screw barrel 70.

[0038] A cylindrical section 1021 is formed at the inner end of the multi-stage through hole 102, and a threaded section 1022 is formed at the outer end. The inner diameter of the cylindrical section 1021 is smaller than the inner diameter of the multi-stage through hole 102 at which it connects. The inner diameter of the threaded section 1022 is larger than the inner diameter of other parts / sections of the multi-stage through hole 102.

[0039] A cylindrical surface is formed at the other end of the outer peripheral surface of the first stud 41 and at the other end of the outer peripheral surface of the second stud 51. Specifically, a cylindrical surface 414 is formed at the other end of the outer peripheral surface of the first stud 41, and a cylindrical surface 513 is formed at the other end of the outer peripheral surface of the second stud 51. The sleeve 60 and the screw 70 disposed on the first stud 41 can be fitted onto its cylindrical surface 414, and the sleeve 60 and the screw 70 disposed on the second stud 51 can be fitted onto its cylindrical surface 513.

[0040] The outer peripheral surface of the screw barrel 70, away from its cap, is formed as an external thread surface 71. The external thread surface 71 corresponds to and matches the threaded hole section 1022, thus fixing the screw barrel 70 to the wall of the reactor 100. The inner diameter of the screw barrel 70 is consistent with the outer diameter of the cylindrical surface (i.e., cylindrical surface 414 and cylindrical surface 513, hereinafter the same), and the inner diameter of the sleeve 60 is larger than the outer diameter of the cylindrical surface. This design allows for radial clearance between the first stud 41 and the multi-stage through hole 102, and between the second stud 51 and the multi-stage through hole 102, during the assembly of the first stud 41 and the second stud 51 into the multi-stage through hole 102. This allows the operator to smoothly screw the external thread surface 412 and the external thread surface 511 into the countersunk hole 221. At that time, in order to facilitate the simultaneous and smooth insertion of the first axial protrusion ring 413, the second axial protrusion ring 512 and the protrusion post 222, the end of the protrusion post 222 is formed into a conical shape (the small diameter end is the free end).

[0041] A sealing ring portion 73 matching the cylindrical surface is provided on the inner circumferential surface of the screw barrel 70. The screw barrel 70 can be screwed into the threaded hole section 1022 and fixedly connected to the wall of the reactor 100. An end countersunk hole 72 is formed on the end of the screw barrel 70 facing the sleeve 60, so that the end of the sleeve 60 (facing the screw barrel 70) can extend into the end countersunk hole 72, and a sealing ring portion 64 matching the inner circumferential surface of the end countersunk hole 72 is provided on the outer circumferential surface of the sleeve 60.

[0042] The outer diameter of the sleeve 60 is the same as the inner diameter of the light column hole section 1021, so that the sleeve 60 can extend to the light column hole section 1021. The outer circumferential surface of the sleeve 60 is provided with a sealing ring portion 63 that corresponds to the light column hole section 1021.

[0043] During assembly, the sleeve 60 and the screw barrel 70 are pre-fitted onto the first stud 41 and the second stud 51. The multi-stage through holes 102 on the reactor 100 are matched one-to-one with the threaded countersunk holes 221 on the lower ring body 20. That is, after aligning them radially, the end of the first stud 41 with the external threaded surface 412 and the end of the second stud 51 with the external threaded surface 511 are respectively inserted into their corresponding matching multi-stage through holes 102 and into the reactor 100, ultimately extending into and screwing into their corresponding threaded countersunk holes 221. This initially connects the reactor 100 and the lower ring body 20 together. At that time, the axial protruding ring 413 on the first stud 41 and the axial protruding ring 512 on the second stud 51 are respectively inserted and connected to their corresponding protruding rings 222, ensuring the connection strength at the connection between the end of the first stud 41, the end of the second stud 51 and the lower ring body 20, so that it has good reliability and firmness. Next, the screw cylinder 70 is screwed so that one end is gradually screwed into the threaded hole section 1022 of the multi-stage through hole 102. During this period, the screw cylinder 70 can push the sleeve 60 to move / slide towards the inner end of the multi-stage through hole 102, and can allow the inner end of the sleeve 60 to extend into the smooth column hole section 1021, and can establish a good seal between the sleeve 60 and the opposite circumferential surface of the smooth column hole section 1021 by means of the configured sealing ring part 63. The screw barrel 70 allows the first stud 41 and the second stud 51 to remain firmly fixed relative to the wall of the reactor 100. Furthermore, the sealing ring 73 establishes a good seal between the screw barrel 70 and the opposing circumferential surfaces of the first stud 41 and the second stud 51. Twisting the screw barrel 70 relative to the first stud 41 and the second stud 51 causes the end countersunk hole 72 to move towards the sleeve 60, ultimately housing one end of the sleeve 60 within it, thereby pushing the sleeve 60 relative to the first stud 41 and the second stud 51.

[0044] An elastic ring 61 is fixedly provided at the inner end of the sleeve 60, and the outer diameter of the elastic ring 61 is not greater than the inner diameter of the light column hole section 1021. When the sleeve 60 moves relative to the first stud 41 and the second stud 51, the elastic ring 61 can be gradually pushed into the light column hole section 1021 and eventually at least partially pushed into the gap between the inner wall of the reactor 100 and the outer wall of the lower ring 20, thereby forming a sealing structure by means of elastic deformation.

[0045] An inner protrusion 101 is formed on the inner wall of the reactor 100, corresponding to the inner port of the multi-stage through hole 102. One end of the multi-stage through hole 102 extends to the end face of the inner protrusion 101. An outer protrusion 22 is formed on the outer wall of the lower ring 20, corresponding to the port of the threaded countersunk hole 221. The port of the threaded countersunk hole 221 extends to the end face of the outer protrusion 22.

[0046] On the inner protrusion 101, a countersunk hole 10211 is formed at the inner port of the multi-stage through hole 102 (the countersunk hole 10211 is specifically formed at the outer port of the light column hole segment 1021). The countersunk hole 10211 is formed as a tapered countersunk hole with the large diameter end facing inward, and the inner diameter of the countersunk hole 10211 is larger than the inner diameter of the light column hole segment 1021.

[0047] On the outer protrusion 22, a second countersunk hole 2211 is formed at the port of the first countersunk hole 221, and the second countersunk hole 2211 is formed as a tapered countersunk hole with the larger diameter end facing inward, and the inner diameter of the second countersunk hole 2211 is larger than the inner diameter of the cylindrical hole section 1021. The (small diameter end) port of the first countersunk hole 10211 is opposite to the (small diameter end) port of the second countersunk hole 2211, and preferably the inner diameters of the small diameter end ports of the two countersunk holes are set to be substantially the same size.

[0048] As the sleeve 60 and / or studs (i.e., the first stud 41 and the second stud 51) push the sleeve 60 to move relative to the first stud 41 and the second stud 51, they can compress the elastic ring 61 to produce elastic deformation and cause the end of the elastic ring 61 to deform and fill into the countersunk hole 10211 and the countersunk hole 2211 that are arranged opposite to each other. This helps to improve the sealing performance of the sealing structure, thereby improving the sealing effect at the inner end of the multi-stage through hole 102 and the port of the threaded countersunk hole 221. It can effectively inhibit the intrusion of chemical solution into the multi-stage through hole 102 and the threaded countersunk hole 221.

[0049] On the outer peripheral surface of the first stud 41, a shoulder 415 is formed at the position where the external thread surface 412 and the cylindrical surface 414 meet. The end faces of the shoulder 415 are all formed as conical surfaces, with the small diameter end of the conical surface facing the external thread surface 412.

[0050] On the outer peripheral surface of the second stud 51, a shoulder 415 is formed at the position where the external thread surface 511 and the cylindrical surface 513 meet. The end faces of the shoulder 415 are all formed as conical surfaces, and the small diameter end of the conical surface faces the external thread surface 511.

[0051] A radial flange 62 in the shape of an annular shape is formed on the inner wall of the sleeve 60, and the end face of the radial flange 62 near the screw barrel 70 is formed into a conical surface, with the small diameter end of the conical surface approaching the screw barrel 70.

[0052] The tapered surface of the shoulder 415 can contact the tapered surface of the radial flange 62, allowing the first stud 41 and the second stud 51 to push the sleeve 60 to move synchronously. This facilitates elastic deformation of the elastic ring 61 on the sleeve 60 during the process of the external thread surface 412 being screwed into the countersunk hole 221 and the external thread surface 511 being screwed into the countersunk hole 221, allowing it to penetrate into any gaps formed at the opposite ends of the multi-stage through hole 102 and the countersunk hole 221, thus creating a sufficient seal. Simultaneously, the screw 70 pushes the sleeve 60, which on the one hand causes the sleeve 60 to move further towards the inner wall of the reactor 100, and on the other hand causes the elastic ring 61 to deform further, improving the sealing performance; on the other hand, it also ensures that the sleeve 60 is securely and reliably locked relative to the first stud 41 and the second stud 51.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Many aspects of this utility model can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A production apparatus for trifluoromethylpyrimidine, comprising a heat exchange cylinder (200) fixed in a reactor (100); the heat exchange cylinder (200) comprises an upper ring (10) fixed to the upper part of the reactor (100), a lower ring (20) fixed to the lower part of the reactor (100), and a plurality of fins (30) connected between the two rings and distributed alternately around the circumference; characterized in that: The lower ring body (20) is fixedly connected to the reactor (100) by a plurality of first connecting ends (40) and a plurality of second connecting ends (50) distributed alternately around the circumference; on the wall of the reactor (100), multi-level through holes (102) are formed at the positions where the first connecting ends (40) and the second connecting ends (50) are respectively; a threaded countersunk hole (221) is formed on the wall of the lower ring body (20) that corresponds to the multi-level through holes (102); a protrusion (222) is formed on the inner bottom of the threaded countersunk hole (221). The first connecting end (40) includes a first stud (41) and a shaft hole (411) is formed on the first stud (41); the second connecting end (50) includes a second stud (51); An external threaded surface (412) is formed at one end of the outer peripheral surface of the first stud (41), and an axial protruding ring (413) is formed on the bottom surface of the groove formed on the end face; an external threaded surface (511) is formed at one end of the outer peripheral surface of the second stud (51), and an axial protruding ring (512) is formed on the bottom surface of the groove formed on the end face. External thread surface one (412) and external thread surface two (511) are respectively matched with thread countersunk hole one (221), and the protrusion (222) is inserted into axial protrusion ring one (413) and axial protrusion ring two (512); the protrusion (222) that is matched with the first stud (41) is formed with a through hole structure, and the through hole structure can connect the ring cavity on the lower ring body (20) and the shaft hole (411). Sealing structures are provided between the opposing circumferential surfaces of the first stud (41) and the multi-stage through hole (102), and between the opposing circumferential surfaces of the second stud (51) and the multi-stage through hole (102).

2. The trifluoromethylpyrimidine production apparatus according to claim 1, characterized in that: The end face of the protrusion (222) is contracted inward relative to the port of the threaded countersunk hole (221).

3. The trifluoromethylpyrimidine production apparatus according to claim 1, characterized in that: The sealing structure includes a sleeve (60) and a screw barrel (70); a smooth column section (1021) is formed at the inner end of the multi-stage through hole (102), and a threaded section (1022) is formed at the outer end; the inner diameter of the threaded section (1022) is larger than the inner diameter of other parts of the multi-stage through hole (102); A smooth cylindrical surface is formed at the other end of the outer peripheral surface of the first stud (41) and at the other end of the outer peripheral surface of the second stud (51); the sleeve (60) and the screw (70) disposed on the first stud (41) can be fitted onto its smooth cylindrical surface, and the sleeve (60) and the screw (70) disposed on the second stud (51) can be fitted onto its smooth cylindrical surface. The inner diameter of the screw barrel (70) is consistent with the outer diameter of the cylindrical surface; a sealing ring part (73) is provided on the inner circumferential surface of the screw barrel (70); the screw barrel (70) can be screwed into the threaded hole section (1022) and an end countersunk hole (72) is formed at one end of the screw barrel (70). The inner diameter of the sleeve (60) is larger than the outer diameter of the cylindrical surface; the end of the sleeve (60) can extend into the end countersunk hole (72) and a sealing ring part two (64) that matches the inner circumferential surface of the end countersunk hole (72) is provided on the outer circumferential surface of the sleeve (60); the outer diameter of the sleeve (60) is consistent with the inner diameter of the cylindrical hole section (1021) and the sleeve (60) can extend to the cylindrical hole section (1021); a sealing ring part one (63) that corresponds to the cylindrical hole section (1021) is provided on the outer circumferential surface of the sleeve (60).

4. The trifluoromethylpyrimidine production apparatus according to claim 3, characterized in that: An elastic ring (61) is fixedly provided at the inner end of the sleeve (60), and the outer diameter of the elastic ring (61) is not greater than the inner diameter of the light column hole section (1021).

5. The trifluoromethylpyrimidine production apparatus according to claim 4, characterized in that: A countersunk hole one (10211) is formed at the inner port of the multi-stage through hole (102), and a countersunk hole two (2211) is formed at the port of the threaded countersunk hole one (221). Both countersunk hole one (10211) and countersunk hole two (2211) are formed as conical countersunk holes with the large diameter end facing inward; the inner diameter of countersunk hole one (10211) and the inner diameter of countersunk hole two (2211) are both larger than the inner diameter of the light column hole section (1021).

6. The trifluoromethylpyrimidine production apparatus according to claim 4 or 5, characterized in that: On the outer peripheral surface of the first stud (41), a shoulder (415) is formed at the position where the external thread surface one (412) connects with the smooth cylindrical surface; on the outer peripheral surface of the second stud (51), a shoulder (415) is formed at the position where the external thread surface two (511) connects with the smooth cylindrical surface; the end face of the shoulder (415) is formed as a conical surface and the small diameter end of the conical surface faces the external thread surface one (412) side or the external thread surface two (511) side; A radial flange (62) in the shape of an annular shape is formed on the inner wall of the sleeve (60), and the end face of the radial flange (62) near the screw cylinder (70) is formed as a conical surface, and the small diameter end of the conical surface is close to the screw cylinder (70). The tapered surface of the shoulder (415) can contact the tapered surface of the radial flange (62), so that the first stud (41) and the second stud (51) can push the sleeve (60) to move.

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