Solid threaded rod hybrid core

Abstract

The application discloses a solid threaded rod mixed core and particularly relates to the field of micro-reactor mixed cores, which comprises a solid cylinder and a groove thread on the solid cylinder, and the solid cylinder comprises a solid cylinder body, wherein the top and bottom ends of the solid cylinder body are respectively provided with an upper end head non-threaded area and a lower end head non-threaded area, an overflow inlet is arranged at the position of the upper end head non-threaded area, and an overflow outlet is arranged at the position of the lower end head non-threaded area. The application adopts the mode that multiple groups of near-cylinder cores are connected in series, and the working principle is similar to that of a static mixer, so that the mixed fluid is mixed and mass transferred efficiently through the multiple groups of cores; the cores in the same set of pipes can be connected in series in the same style or in different styles, the internal mixing unit core can be easily replaced, and thus the problems that the existing micro-reactor is not easy to clean after scaling, the disassembly and assembly process is time-consuming, and the mixing unit is inconvenient to replace are solved.

Description

Technical Field

[0001] This invention relates to the field of microreactor mixing core technology, and more specifically, to a solid threaded rod mixing core. Background Technology

[0002] Existing microreactors involve the continuous mixing of two or more fluids to facilitate mass exchange, such as emulsification, or corresponding chemical reactions. The mixing effect of a microreactor is correlated with the size of the microchannels; generally, smaller microchannels result in better mixing. However, this presents a contradiction in practical production applications. Smaller microchannels lead to higher pressure drops, affecting the flow rate of the microreactor, often making it impossible to balance mixing effectiveness and flow rate. Furthermore, the relatively complex microchannel structures designed to achieve optimal mixing can cause scaling or, in severe cases, blockage.

[0003] With the promotion of microreactor technology in my country's pharmaceutical and fine chemical industries and the need for practical maintenance in production processes, detachable microreactors have become mainstream. CN215842929U and CN215540778U (the previously authorized patents of Runzhi) provide a detachable variable diameter mixing core, which is a core component of a semi-detachable microchannel reactor. It avoids the problem of multiple disassembly and reassembly processes and time-consuming inconvenience of most detachable microreactors on the market. However, due to the structural design of using micropores for flow guidance, it is more suitable for relatively low-flux mixing or relatively low-viscosity materials. When using high-viscosity materials or very high-flux materials, a sudden increase in pressure drop will occur.

[0004] There are also reports of surface treatment methods involving wrapping metal wires around the outer surface of a smooth cylindrical body to achieve turbulent mixing in annular channels. However, this method is more suitable for scientific research and simulation calculations, and its practicality for manufacturing hybrid cores in actual production is limited. Summary of the Invention

[0005] To overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a solid threaded rod mixing core. The technical problem to be solved by the present invention is that the complex structure of the existing microreactor leads to a large pressure drop under high-throughput or high-viscosity conditions, and it cannot combine and balance mixing units for various mixing cores suitable for high and low throughput.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a solid threaded bar hybrid core, comprising a solid cylinder and a grooved thread thereon, wherein the solid cylinder comprises a solid cylindrical body, wherein the top and bottom ends of the solid cylindrical body are respectively provided with an upper end without a thread and a lower end without a thread, an overflow inlet is provided at the position of the upper end without a thread, and an overflow outlet is provided at the position of the lower end without a thread, in addition, the portion of the solid cylinder other than the grooved thread is set as a cylindrical body without a groove, and the grooved thread includes a clockwise outer surface groove line and a counterclockwise outer surface groove line;

[0007] The overflow inlet, the unthreaded area at the upper end, the unthreaded area at the lower end, and the overflow outlet are optional parts. The outer surface groove lines with clockwise and counterclockwise rotation directions intersect at the intersection point, and the included angle of the intersection point is set as α.

[0008] In a preferred embodiment, the included angle of α is set to 20°-160°, preferably 45°-135°.

[0009] In a preferred embodiment, m represents the number of clockwise outer surface groove lines 4, and n represents the number of counterclockwise outer surface groove lines; the number of m and n is not less than 1; the single or multiple clockwise or counterclockwise outer surface groove lines with the same rotation direction are distributed in a similar way to elongated spring lines along the radial direction on the surface of the solid cylindrical body and are arranged in parallel.

[0010] In a preferred embodiment, the overall cross-sectional dimension, i.e., the diameter D, of the solid cylindrical body remains constant, wherein the length-to-diameter ratio of the solid cylindrical body is between 10:1 and 1:5, preferably between 5:1 and 1:3; the length of the solid cylindrical body is the total length l, i.e., l1 + l2 + l3; wherein l1 represents the length of the solid cylindrical body; l2 represents the length of the unthreaded area at the upper end; and l3 represents the length of the unthreaded area at the lower end.

[0011] In a preferred embodiment, the ratio of the grooved thread to the surface area of ​​the solid cylinder to the ungrooved area of ​​the cylinder is 5:1-1:5, preferably 3:1-1:3; the surface roughness of the solid cylinder is 1-50 micrometers, preferably 5-20 micrometers; and the depth-to-width ratio of the groove is 5:1-1:20, preferably 2:1-1:5.

[0012] In a preferred embodiment, an orthogonal thread design is achieved by machining grooves on the radial outer surface of a solid cylindrical body. The grooved threads cover the entire solid cylindrical body or are not machined at both ends of the solid cylindrical body. The length ratio of the unthreaded area at the upper end to the unthreaded area at the lower end and the grooved thread is 0-1:0-1:10. Overflow ports can also be added to the threaded or unthreaded end portions to achieve enhanced mixing of the fluid on the outer surface of the core. The solid cylindrical threaded core can be a symmetrical or asymmetrical structure, and optional unthreaded end portions or overflow port portions can be added at both ends of the cylinder.

[0013] In a preferred embodiment, the orthogonal thread design is achieved by machining grooved threads on the radial outer surface of a solid cylindrical body. The machining method of the groove can be one or more of the following precision machining methods: knurling, embossing, broaching, grooving, or serrated knurling. The material of the solid cylindrical body is set to stainless steel, Hastelloy, polymer material, or ceramic material.

[0014] The technical effects and advantages of this invention are as follows:

[0015] 1. This invention employs a series connection of multiple near-cylindrical cores, similar to the working principle of a static mixer, to achieve efficient mixing and mass transfer of the fluid to be mixed by passing it through multiple cores; the cores in the same sleeve can be of the same type or different types connected in series.

[0016] 2. This invention relates to various variable technical specifications, including symmetrical and asymmetrical structures, and allows for easy adjustment of features such as the size of the groove, rotation angle, and optional overflow port. It can easily adjust to different requirements in actual processes and production, making process optimization or cleaning and maintenance of the microreactor during production more convenient, and enabling easy replacement of the internal mixing unit core. This solves the problems of existing microreactors being difficult to clean after scaling, time-consuming disassembly and assembly processes, and inconvenience in replacing the mixing unit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the endless, overflow-free symmetrical structure threaded bar hybrid core of the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram of the endless, overflow-free symmetrical structure threaded bar hybrid core of the present invention.

[0019] Figure 3 This is a three-dimensional schematic diagram of the endless, overflow-port-equipped symmetrical threaded bar hybrid core of the present invention.

[0020] Figure 4 This is a schematic diagram of the symmetrical structure of the threaded bar hybrid core with an end and no overflow port according to the present invention.

[0021] Figure 5 This is a three-dimensional schematic diagram of the symmetrical structure of the threaded bar hybrid core with an end and an overflow port according to the present invention.

[0022] Figure 6 This is a schematic diagram illustrating the technical specifications of the asymmetric structure threaded bar hybrid core of the present invention, which has a head at one end and an overflow port at the other end.

[0023] Where α is the intersection angle of the orthogonal groove lines; D is the diameter of the solid cylinder; l1 represents the length of the threaded portion of the solid cylinder; l2 represents the length of the optional unthreaded portion at the end; l3 represents the length of the optional overflow port portion; d1 represents the depth of the clockwise groove line; d2 represents the depth of the counterclockwise groove line; w1 represents the width of the clockwise groove line; and w2 represents the width of the counterclockwise groove line.

[0024] Figure 7 This is a schematic diagram of the thread design of the asymmetric threaded bar hybrid core with a head at one end and an overflow port at the other end according to the present invention; 7a Two orthogonal groove lines; 7b Four orthogonal groove lines; 7c Six orthogonal groove lines;

[0025] Figure 8 This is a schematic diagram of the asymmetric structure threaded bar hybrid core of the present invention, which has an end cap at only one end.

[0026] Figure 9 This is a schematic diagram of the asymmetric structure threaded bar hybrid core with an overflow port at one end according to the present invention.

[0027] Figure 10 This is a schematic diagram of the asymmetric structure threaded bar hybrid core of the present invention, where the end and overflow port are only at one end.

[0028] Figure 11 This is a schematic diagram illustrating the combination of the (asymmetric) structure threaded bar hybrid core and the matching reaction sleeve of the present invention. Symmetric and asymmetric structure cores can be used in series.

[0029] The attached diagram is labeled as follows: 1 Overflow port inlet; 2 Unthreaded area at the upper end; 3 Solid cylindrical body; 4 Clockwise outer surface groove line; 5 Counterclockwise outer surface groove line; 6 Ungrooved area of ​​the cylinder; 7 Intersection of the outer surface groove lines; 8 Unthreaded area at the lower end; 9 Overflow port outlet. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a solid threaded bar hybrid core, comprising a solid cylinder and a grooved thread thereon. The solid cylinder includes a solid cylindrical column 3, wherein the top and bottom ends of the solid cylindrical column 3 are respectively provided with an upper unthreaded area 2 and a lower unthreaded area 8. An overflow inlet 1 is provided at the position of the upper unthreaded area 2, and an overflow outlet 9 is provided at the position of the lower unthreaded area 8. In addition, the portion of the solid cylinder other than the grooved thread is set as a column ungrooved area 6, and the grooved thread includes a clockwise outer surface groove line 4 and a counterclockwise outer surface groove line 5.

[0032] The overflow inlet 1, the upper unthreaded area 2, the lower unthreaded area 8, and the overflow outlet 9 are optional parts. The outer surface groove lines 4 and 5 of the clockwise outer surface groove lines with different rotation directions are provided with an outer surface groove line intersection point 7. The included angle of the outer surface groove line intersection point 7 is set as α, and the included angle of α is set to 20°-160°, preferably 45°-135°.

[0033] m represents the number of clockwise outer surface groove lines 4, and n represents the number of counterclockwise outer surface groove lines 5; the number of m and n is not less than 1; the single or multiple clockwise outer surface groove lines 4 or counterclockwise outer surface groove lines 5 with the same rotation direction are distributed in a similar way to elongated spring lines along the radial direction on the surface of the solid cylindrical body 3 and are arranged in parallel.

[0034] The overall cross-sectional dimension, i.e., the diameter D, of the solid cylindrical body 3 remains constant. The length-to-diameter ratio of the solid cylindrical body 3 is between 10:1 and 1:5, preferably 5:1 to 1:3. The length of the solid cylindrical body 3 is the total length l, i.e., l1 + l2 + l3. Wherein l1 represents the length of the solid cylindrical body 3; l2 represents the length of the unthreaded area 2 at the upper end; l3 represents the length of the unthreaded area 8 at the lower end; the ratio of the surface area of ​​the grooved thread and the ungrooved area 6 of the cylinder to the surface area of ​​the solid cylindrical body is 5:1 to 1:5, preferably 3:1 to 1:3; the surface roughness of the solid cylindrical body 3 is 1-50 micrometers, preferably 5-20 micrometers; the depth-to-width ratio of the groove is 5:1 to 1:20, preferably 2:1 to 1:5.

[0035] Orthogonal thread design is achieved by machining grooves on the radial outer surface of a solid cylindrical body 3. The grooved threads cover the entire solid cylindrical body 3, or the two ends of the solid cylindrical body 3 are not machined with threads. The length ratio of the unthreaded area 2 at the upper end and the unthreaded area 8 at the lower end to the grooved threads is 0-1:0-1:10. Overflow ports can also be added to the threaded or unthreaded end portions to achieve enhanced mixing of the fluid on the outer surface of the core. The solid cylindrical threaded core can be a symmetrical structure or an asymmetrical structure. Optional unthreaded end portions or overflow port portions can be added to both ends of the cylinder.

[0036] Orthogonal thread design is achieved by machining grooved threads on the radial outer surface of a solid cylindrical body 3. The machining method of the groove can be one or more of the following precision machining methods: knurling, embossing, drawing, grooving, or grooving. The material of the solid cylindrical body 3 is set to stainless steel, Hastelloy, polymer material, or ceramic material.

[0037] This hybrid core provides a symmetrical or asymmetrical threaded rod hybrid core, which can be mainly divided into four states in daily operation and use: normal use, disassembly, cleaning and maintenance, and reassembly (including replacement of hybrid core components); the invention will be further described below with reference to the accompanying drawings;

[0038] Example 1: Normal use;

[0039] like Figure 11 As shown, in actual use, multiple sets of cores with symmetrical or asymmetrical threaded rods are installed in series in a matching cylindrical reaction sleeve, and the inlet and outlet ends are fixedly connected by traditional nuts or special ferrules.

[0040] In addition, different lengths and specifications of threaded rod mixing cores can be fitted into the same matching reaction sleeve according to actual requirements;

[0041] Example 2: Disassembly;

[0042] like Figure 11 As shown, if scaling or blockage occurs during the actual use of the threaded rod mixing core, and cleaning or maintenance is required, the nuts fixing both ends of the reaction sleeve that is matched with the mixing core can be easily removed, and the sleeve can be tilted to pour out all the removable cores inside, or the removable cores can be pushed out from the other end using a solid rod of appropriate size, thereby completing the disassembly process.

[0043] Example 3: Cleaning and maintenance;

[0044] like Figure 5 or Figure 6 The diagram shows the structure and technical specifications of each part of the solid threaded rod hybrid core during normal use. Therefore, special attention should be paid to whether there are solid foreign objects, scale, or blockages on the grooves (including clockwise and counterclockwise grooves) on the surface of the cylinder during cleaning and maintenance. If scale or blockage is found, it can generally be simply treated with the matching fine metal wire, and then the threaded rod hybrid core can be placed in an ultrasonic cleaning tank for 10-20 minutes to complete the cleaning process.

[0045] Example 4: Reassembly (including replacement of hybrid core components);

[0046] After cleaning and maintaining the threaded bar mixed core in Example 3, if some cores are found to have severe scaling (requiring additional maintenance beyond ultrasonic cleaning) and need to be replaced, or if different specifications of threaded bar mixed cores need to be replaced based on the actual situation, reassembly can be performed; according to... Figure 6 The diagram illustrates the selection of a suitable hybrid core for a solid threaded bar hybrid core, and provides a schematic diagram of the various technical specifications involved.

[0047] The process is the reverse of the disassembly process in Example 2. Multiple cores are installed into the matching cylindrical reaction sleeve in a series connection manner, and the inlet and outlet ends are fixedly connected by traditional nuts or special clamps.

[0048] Example 5: Synthesis process for easily clogged high-viscosity material intermediates;

[0049] The threaded rod mixing core of this invention includes symmetrical and asymmetrical structures. The combined microchannel reactor can be conveniently used in the synthesis process of easily clogged high-viscosity material intermediates. Compared with the conventional fully disassembled Bayer microreactor Cascade mixer, the maintenance time of the microreactor involved in this invention is reduced by at least 50%, and even up to 75%, from the discovery of potential clogging or fouling (e.g., a rapid increase in system pressure drop) to disassembly, cleaning, maintenance, possible replacement of the mixing core or unit, and reassembly. This greatly improves the maintenance efficiency in process optimization or production, and the technical requirements for operators are not high. In addition, by combining it with the detachable variable diameter mixing cores described in CN215842929U and CN215540778U, its process adaptability and flexibility to different viscosity systems can be universally improved, while allowing the microreactor process design to meet personalized design requirements.

[0050] Working principle of this invention:

[0051] The present invention provides a threaded rod hybrid core, which can be configured with a symmetrical or asymmetrical structure, including a solid cylindrical body 3, threads on the outer surface of the cylinder, an optional unthreaded portion at the end of the cylinder, and an optional overflow inlet / outlet portion. As an alternative, traditional fully disassembled microreactors require sufficient maintenance time.

[0052] The present invention provides a threaded bar hybrid core that is an integral variable-diameter hybrid core, which can be further disassembled into separate cores.

[0053] V. Key Points and Protection Points of the Invention

[0054] This invention can meet the needs of mass industrial manufacturing. Existing microreactors have complex structures that lead to large pressure drops under high-throughput or high-viscosity conditions and cannot combine and balance mixing units for various mixing cores suitable for high and low throughput. Moreover, it can meet the needs of mass production of components from laboratory to production level, and can also be designed with different specifications according to requirements, including the size of the groove, the rotation angle and optional overflow port, etc.

[0055] This invention adopts an integrated design mode, and can be either a symmetrical or asymmetrical structure to meet personalization and customization needs; different specifications of threaded cores can be used in combination, and a single standard core facilitates testing and obtaining experience data, and operators can easily change different specifications and ratios as needed;

[0056] The solid threaded rod hybrid core of the present invention can be used in combination with the detachable variable diameter hybrid cores described in existing publications CN215842929U and CN215540778U, which can broadly improve its adaptability and flexibility, while enabling microreactor process design to meet personalized design requirements.

[0057] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0058] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0059] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solid threaded rod hybrid core comprising a solid cylinder and a groove thread thereon, characterized by: The solid cylinder includes a solid cylinder (3), wherein the solid cylinder (3) is provided with an upper end head non-threaded area (2) and a lower end head non-threaded area (8) at both ends of the solid cylinder (3), respectively, the upper end head non-threaded area (2) is provided with an overflow inlet (1) at the position, the lower end head non-threaded area (8) is provided with an overflow outlet (9) at the position, in addition, the part of the solid cylinder except the groove thread is provided as a cylinder non-groove area (6), the groove thread includes a clockwise outer surface groove line (4) and an anticlockwise outer surface groove line (5); Wherein the overflow inlet (1), the upper end head non-threaded area (2), the lower end head non-threaded area (8) and the overflow outlet (9) are optional parts, the intersection of the clockwise outer surface groove line (4) and the anticlockwise outer surface groove line (5) in different rotation directions is provided with an outer surface groove line intersection point (7), the included angle of the outer surface groove line intersection point (7) is α; The included angle of the α is set as 20°-160°; M represents the number of the clockwise outer surface groove line (4), n represents the number of the anticlockwise outer surface groove line (5); the number of the m and the n are not less than 1; a single or multiple clockwise outer surface groove lines (4) or anticlockwise outer surface groove lines (5) in the same rotation direction are distributed on the surface of the solid cylinder (3) in the form of a similar elongated spring wire and are arranged in parallel; The whole cross-sectional dimension of the solid cylinder (3) is constant, that is, the diameter D, wherein the length-diameter ratio of the solid cylinder (3) is between 10:1 and 1:5; the length of the solid cylinder (3) is the total length l, that is, l 1+l 2+l 3; wherein the l 1 represents the length of the solid cylinder (3); the l 2 represents the length of the upper end head non-threaded area (2); the l 3 represents the length of the lower end head non-threaded area (8); The ratio of the groove thread and the cylinder non-groove area (6) to the surface area of the solid cylinder is 5:1-1:5; the surface roughness of the solid cylinder (3) is 1-50 microns; the depth-width ratio of the groove is 5:1-1:

20.

2. A solid threaded rod hybrid core according to claim 1, characterized in that: The orthogonal thread design is realized by the method of machining grooves on the radial outer surface of the solid cylinder (3), the groove thread is distributed throughout the solid cylinder (3) or no thread is machined at both ends of the solid cylinder (3), wherein the length ratio of the upper end head non-threaded area (2) and the lower end head non-threaded area (8) to the groove thread is 0-1:0-1:

10.

3. A solid threaded rod hybrid core according to claim 1, wherein: The orthogonal thread design is realized by the method of machining groove threads on the radial outer surface of the solid cylinder (3), wherein the machining method of the groove can be one or more of knurling, embossing, drawing, row cutter flower or bite flower precision machining method.

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