Pyruvic acid methyl ester heating device

Abstract

This utility model relates to the field of methyl pyruvate heating technology, specifically, to a methyl pyruvate heating device. It includes a heating container and an inner liner disposed inside the heating container, forming a cavity between the heating container and the inner liner. An electric heating wire is installed within the cavity, spirally wound around the outer wall of the inner liner. The top of the heating container is sealed by a top with a liquid inlet. A heating auxiliary mechanism is rotatably mounted on the top, with one end extending into the inner liner. During use, the rotating stirring rod drives two sets of stirring components to thoroughly stir the liquid in the center of the heating container. Simultaneously, an extension rod moves synchronously with the stirring rod, driving a liquid-dispensing rod to stir the liquid at the edge of the container. Through the sliding of its end protrusion within an annular groove, the liquid at the edge is continuously pushed towards the center, effectively improving overall fluidity, breaking temperature gradients, and preventing localized overheating.

Description

Technical Field

[0001] This utility model relates to the field of methyl pyruvate heating technology, and more specifically, to a methyl pyruvate heating device. Background Technology

[0002] In chemical production processes, methyl pyruvate is an important organic synthesis intermediate widely used in the preparation of pharmaceuticals, pesticides, and fine chemicals. Due to its heat sensitivity and volatility, it is prone to decomposition or evaporation loss during heat treatment due to localized overheating, affecting product quality and process stability.

[0003] Methyl pyruvate typically has a low viscosity, and low-viscosity liquids are relatively easy to stir. Existing methyl pyruvate heating devices mostly employ simple electric heating structures combined with a single stirring method, lacking effective means to control the uniformity of material heating. Traditional stirring mechanisms can usually only stir the liquid in the central area of ​​the container, failing to effectively drive the flow of liquid in the peripheral areas. This leads to uneven heat transfer, creating temperature gradients and causing problems such as localized high temperatures, coking, or crystallization. Furthermore, conventional stirring devices lack the ability to scrape the walls while simultaneously achieving uniform stirring. After prolonged operation, material residue easily remains on the inner wall of the container, affecting subsequent heating efficiency and equipment cleanliness. Summary of the Invention

[0004] The purpose of this invention is to provide a methyl pyruvate heating device to solve the problems mentioned in the background art.

[0005] To address the aforementioned problems, this utility model provides a methyl pyruvate heating device, comprising a heating container and an inner liner disposed inside the heating container. A cavity is formed between the heating container and the inner liner, and an electric heating wire is disposed within the cavity. The electric heating wire is spirally wound around the outer wall of the inner liner. The top of the heating container is sealed by a sealing top, and a liquid inlet is provided on the sealing top. A heating auxiliary mechanism is rotatably mounted on the sealing top, with one end of the heating auxiliary mechanism extending into the inner liner. During operation, the heating auxiliary mechanism rotates to drive the liquid in the side wall area of ​​the inner liner to flow towards the center.

[0006] As a further improvement to this technical solution, the heating auxiliary mechanism includes a stirring rod rotatably mounted on a sealed top. Two stirring components are arranged on the stirring rod, one above the other. Each stirring component includes a sleeve fitted onto the stirring rod body. Several blades are fixedly connected in a ring array on the outer wall of the sleeve. The lower sleeve is fixed near the bottom of the stirring rod, while the upper sleeve is slidably mounted on the stirring rod.

[0007] As a further improvement to this technical solution, an outer ring is fixedly connected to the outer side of the four blades, and an extension rod is fixedly connected symmetrically to the outer side wall of the outer ring. A movable port is opened at one end of the extension rod near the inner liner, and a connecting rod is slidably arranged in the movable port. Vertically arranged liquid-dispensing rods are fixedly connected to the upper and lower ends of the connecting rod, respectively. A sliding rod is slidably arranged inside the extension rod, and one end of the sliding rod passes through the extension rod and is connected to the connecting rod.

[0008] As a further improvement to this technical solution, a through groove is vertically provided on the liquid-dispensing rod, and a scraper is fixed in the through groove with screws. The scraper is located on the side of the liquid-dispensing rod close to the inner liner.

[0009] As a further improvement to this technical solution, an installation groove is provided on the side wall of the stirring rod. A reciprocating screw is rotatably installed in the installation groove. A sliding block is threaded onto the reciprocating screw and slides in the installation groove. A collar located on the upper side is fixedly connected to the sliding block. The rotation of the reciprocating screw drives the collar to move up and down along the axial direction of the stirring rod. The upper end of the reciprocating screw passes through a fixed top seat at the top of the stirring rod. A motor that drives the reciprocating screw to rotate is installed on the top seat.

[0010] As a further improvement to this technical solution, the upper end of the stirring rod passes through the sealing top and is fixedly provided with a ring block. A driven wheel is fixedly installed on the ring block, and a driving wheel is rotatably installed on the upper side of the sealing top. The driven wheel and the driving wheel mesh with each other, and the driving wheel is driven by an independent motor.

[0011] As a further improvement to this technical solution, a fixed seat is provided on the lower outer side of the heating container, and a cylinder is installed on the fixed seat. The piston end of the cylinder is fixedly connected to the sealing top. A sealing strip is provided at the end of the heating container, and a slot is opened on the lower side of the sealing top. When the sealing top seals the heating container, the sealing strip engages with the slot.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In this methyl pyruvate heating device, during use, the rotating stirring rod drives the upper and lower sets of stirring components to fully stir the liquid in the middle of the heating container. At the same time, the extension rod moves synchronously with the stirring rod, driving the liquid-dispensing rod to stir the liquid at the edge of the container. Through the sliding of the end protrusion in the annular groove, the liquid at the edge is continuously pushed towards the center area, effectively improving the overall fluidity, breaking the temperature gradient, and preventing local overheating.

[0014] 2. In this methyl pyruvate heating device, before heating, the sealing top is separated from the heating container by the pushing action of the cylinder. Simultaneously, the sealing top drives the heating auxiliary mechanism to rise and detach from the container. At this time, the sliding rod can be manually rotated to push the dispensing rod to slide within the moving port, thereby adjusting its position to ensure that the scraper can closely adhere to the inner wall of the heating container, further improving the stirring and scraping effect. Furthermore, during the rotation of the reciprocating screw, the upper stirring component moves up and down along the stirring rod axis, causing the upper and lower sets of dispensing rods and scrapers to work together, closely adhering to the inner wall for reciprocating stirring. This enhances material flowability, improves material mixing uniformity, effectively avoids local accumulation and dead zones, and significantly improves overall stirring efficiency and uniformity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 One of the cross-sectional schematic diagrams of the heating container structure of the utility model;

[0017] Figure 3 The second schematic cross-sectional view of the heating container structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of a sealing strip, etc., for a utility model.

[0019] Figure 5 This is a schematic diagram of the heating auxiliary mechanism of the utility model.

[0020] Figure 6 A schematic diagram of the structure of a stirring rod and other components of a utility model;

[0021] Figure 7 This is a cross-sectional schematic diagram of the extension rod and other structures of the utility model;

[0022] Figure 8 This is a schematic diagram of the liquid-dispensing rod structure of a utility model;

[0023] Figure 9 This is a schematic diagram of a reciprocating lead screw and sliding block combination for a utility model.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Heating container; 11. Sealed top; 12. Liquid inlet; 13. Cavity; 14. Electric heating wire; 15. Fixing base; 16. Sealing strip;

[0026] 2. Heating auxiliary mechanism; 21. Stirring rod; 22. Reciprocating lead screw; 23. Ring block; 24. Driven wheel; 25. Top seat; 26. Stirring component; 27. Outer ring; 28. Extension rod; 281. Connecting rod; 282. Liquid-dispensing rod; 283. Through groove; 284. Scraper; 285. Slide rod;

[0027] 3. Drive wheel; 4. Cylinder. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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. Example

[0030] Please see Figures 1-9 As shown, this embodiment provides a methyl pyruvate heating device, including a heating container 1 and an inner liner provided inside the heating container 1. A cavity 13 is formed between the heating container 1 and the inner liner. Multiple turns of electric heating wire 14 are wound in the cavity 13. The electric heating wire 14 is tightly attached to the outer wall of the inner liner in a spiral manner. The electric heating wire 14 is connected to an external power module. After the electric heating wire 14 is energized, it can uniformly heat the inner liner.

[0031] The top of the heating container 1 is sealed by a sealing top 11, such as Figure 4 As shown, in order to prevent the sealing top 11 from not sealing properly at the connection with the heating container 1, a sealing strip 16 is provided at the end of the heating container 1. A slot is provided on the lower side of the sealing top 11. When the sealing top 11 seals the heating container 1, the sealing strip 16 engages with the slot to make a sealed connection between the sealing top 11 and the heating container 1.

[0032] A liquid inlet 12 for feeding is provided on the sealed top 11. The liquid inlet 12 is connected to an external material conveying pipe. Methyl pyruvate liquid enters the interior of the heating container 1 through the pipe. A fixed base 15 is fixedly installed on the outer side of the lower end of the heating container 1. A cylinder 4 is installed on the fixed base 15. An AIRTAC cylinder 4 of model SC 160 X 600 can be used. The piston end of the cylinder 4 is fixedly connected to the sealed top 11. When the piston end of the cylinder 4 extends and retracts, it can drive the sealed top 11 and the components above it to rise and fall as a whole. When the cylinder 4 lifts the sealed top 11, the sealed top 11 and the top of the heating container 1 are separated. At this time, the worker can look into the interior of the heating container 1 through the space between the heating container 1 and the sealed top 11 to determine the cleaning status inside the heating container 1.

[0033] To improve the uniformity of heating the methyl pyruvate solution, a heating auxiliary mechanism 2 is rotatably mounted on the sealed top 11. The heating auxiliary mechanism 2 includes a stirring rod 21 rotatably mounted on the sealed top 11. The stirring rod 21 and the sealed top 11 are fixed together by a sealed bearing. The stirring rod 21 is vertically arranged, passes through the sealed top 11 and is fixedly mounted with a ring block 23. The bottom end of the stirring rod 21 extends into the inner liner. A driven wheel 24 is fixedly mounted on the ring block 23. A driving wheel 3 is rotatably mounted on the upper side of the sealed top 11. The driven wheel 24 and the driving wheel 3 mesh. The driving wheel 3 is driven by an independent motor. Both the driven wheel 24 and the driving wheel 3 are sealed by a protective shell. The protective shell is fixed on the sealed top 11. The independent motor is fixed to the upper end of the protective shell. When the independent motor drives the driving wheel 3 to rotate, the stirring rod 21 is driven to rotate through the meshing of the driving wheel 3 and the driven wheel 24.

[0034] Two stirring elements 26 are arranged vertically on the stirring rod 21. Each stirring element 26 includes a sleeve fitted onto the rod body of the stirring rod 21. Several blades are fixedly connected in a ring array on the outer wall of the sleeve. The lower sleeve is fixed to the bottom of the stirring rod 21, while the upper sleeve is slidably mounted on the stirring rod 21. An installation groove is formed on the side wall of the stirring rod 21, penetrating the side wall. A reciprocating screw 22 is rotatably mounted in the installation groove, and a sliding block is threaded onto the reciprocating screw 22. The sliding block and the side wall of the mounting groove slide in contact. The collar located on the upper side is fixedly connected to the sliding block. The top seat 25 is fixedly installed on the top of the stirring rod 21. The upper end of the reciprocating screw 22 passes through the top seat 25 and is rotatably connected to the top seat 25. A motor that drives the reciprocating screw 22 to rotate is installed on the top seat 25. Through the threaded connection between the reciprocating screw 22 and the sliding block, the reciprocating screw 22 rotates and drives the collar to move up and down along the axial direction of the stirring rod 21. During the up and down movement of the collar, the collar drives the blade to move up and down.

[0035] It should be emphasized that the stirring rod 21 consists of two parts, such as Figure 6As shown, it includes an upper rod and a lower rod. The mounting groove is opened on the lower rod. The upper rod and the lower rod are fixedly connected by screws. When the worker is installing, he first connects the reciprocating screw 22 and the sliding block with threads, then installs the reciprocating screw 22 in the mounting groove, the sliding block slides in the mounting groove, and then the upper rod is fixed on the lower rod.

[0036] When the stirring rod 21 drives the blades to rotate, the blades can stir the methyl pyruvate solution. When the collar moves up and down, it can drive the blades to move up and down inside the inner liner, so that the blades can rotate at different heights inside the inner liner, thereby stirring the methyl pyruvate solution at different locations inside the inner liner and improving the stirring effect of the methyl pyruvate solution.

[0037] It is important to emphasize that the motor here uses slip ring brush technology for power supply connection. The slip ring assembly is fixedly installed above the top seat 25. The rotor part of the slip ring rotates synchronously with the stirring rod 21 and the top seat 25, while the stator part of the slip ring is fixed on the protective shell. The power input terminal of the motor is electrically connected to the rotor end of the slip ring through a wire, while the stator end of the slip ring is connected to an external power supply or control circuit. During the rotation of the stirring rod 21, the motor and the top seat 25 can rotate synchronously with it, without being restricted by the entanglement of the external power line, ensuring stable and reliable power supply and meeting the needs of continuous and multi-angle rotation of the equipment.

[0038] To prevent the methyl pyruvate solution from corroding or contaminating the reciprocating lead screw 22 and the inner liner, the inside of the device needs to be rinsed with clean water after the methyl pyruvate solution has been heated. This is to prevent the methyl pyruvate solution from affecting the threaded connection between the reciprocating lead screw 22 and the sleeve after it has dried.

[0039] An outer ring 27 is fixedly connected to the outside of the four blades. An extension rod 28 is symmetrically fixedly connected to the center of the outer wall of the outer ring 27. A movable port is provided at one end of the extension rod 28 near the inner liner. A connecting rod 281 is slidably arranged in the movable port. Vertical liquid-dispensing rods 282 are fixedly connected to the upper and lower ends of the connecting rod 281, respectively. A slide rod 285 is slidably arranged inside the extension rod 28. One end of the slide rod 285 passes through the extension rod 28 and is connected to the connecting rod 281. By rotating the slide rod 285, the connecting rod 281 is driven to move axially along the movable port. When the stirring component 26 rotates, it drives the outer ring 27 to rotate. The rotating outer ring 27 drives the extension rod 28 and the connecting rod 281 to rotate. During the rotation, the connecting rod 281 is subjected to centrifugal force, causing the connecting rod 281 to move in the movable port towards the inner liner, thereby adjusting the distance between the liquid-dispensing rod 282 and the inner wall of the inner liner.

[0040] Meanwhile, a vertical groove 283 is provided on the liquid-dispensing rod 282, and a scraper 284 is fixed in the groove 283 with screws. The scraper 284 is located on the side of the liquid-dispensing rod 282 near the inner liner. When the liquid-dispensing rod 282 is subjected to centrifugal force, the centrifugal force will drive the liquid-dispensing rod 282 and the scraper 284 to move closer to the inner liner, and when the scraper 284 contacts the inner wall of the inner liner, the scraper 284 can scrape away the methyl pyruvate solution on the edge of the inner liner side wall when it rotates, preventing the methyl pyruvate solution from being overheated, enhancing the fluidity of the material, improving the uniformity of material mixing, and effectively avoiding local accumulation and dead zones of the material. At the same time, after the methyl pyruvate solution is discharged, the rotating scraper 284 scrapes off the methyl pyruvate solution adhering to the inner liner, so that the methyl pyruvate solution is discharged as much as possible and the waste of methyl pyruvate solution is reduced.

[0041] In use, methyl pyruvate is injected into the inner liner through the inlet 12. Then, the electric heating wire 14 is turned on to start heating, and the independent motor is connected to the power supply. The independent motor drives the drive wheel 3 to rotate. Through the meshing of the drive wheel 3 and the driven wheel 24, the driven wheel 24 drives the stirring rod 21 to rotate, so that the stirring element 26 stirs the methyl pyruvate solution. The liquid diffuses outward under the action of centrifugal force. At the same time, the rotating outer ring 27 drives the liquid-dispensing rod 282 to rotate, so that the liquid-dispensing rod 282 stirs the methyl pyruvate solution. During the rotation of the liquid-dispensing rod 282, it moves closer to the edge of the inner liner, so that the liquid-dispensing rod 282 drives the scraper 284 to scrape the side wall of the inner liner, and carries away the methyl pyruvate solution near the inner liner. This prevents the methyl pyruvate solution on the side wall of the sealing top 11 of the inner liner from being overheated and damaging its physical and chemical properties, and improves the circulation efficiency of the liquid at the edge of the inner liner.

[0042] At the same time, the motor drives the reciprocating screw 22 to rotate, thereby driving the upper stirring piece 26 to move up and down. The moving stirring piece 26 stirs the solution at different positions in the inner tank, improving the stirring effect of the solution and ensuring the uniform heating effect of the solution.

[0043] When discharging, the rotating scraper 284 can scrape off the solution adhering to the inner liner, reducing the residual solution content on the inner liner and reducing solution waste. While scraping the solution on the inner liner, the movable stirring element 26 moves from the upper side to the lower side of the inner liner, so that the solution adhering to the inner liner is gradually scraped off.

[0044] After the solution was drained, the staff rinsed the inside of the inner tank with clean water to remove any residue.

[0045] This embodiment employs a PID temperature control system, which is existing technology. The system consists of a temperature sensor, a PID controller, a solid-state relay (SSR), and a power module. It can automatically adjust the power output of the electric heating wire 14 according to the preset target temperature, thereby ensuring that the temperature of the liquid inside the inner tank is maintained within the set range.

[0046] Among them, the scraper 284 is preferably made of polytetrafluoroethylene (PTFE) or stainless steel 316L, which can remain stable under high temperature conditions and effectively scrape off the residue on the inner wall. The extension rod 28, the liquid-pushing rod 282 and the reciprocating screw 22 are all made of stainless steel 304 or 316, which have high mechanical strength and corrosion resistance and can adapt to the complex working conditions in the heating process.

[0047] 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 preferred examples and are not intended to limit the 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A methyl pyruvate heating device, comprising a heating container (1) and an inner liner disposed inside the heating container (1), characterized in that: The heating container (1) forms a cavity (13) between itself and the inner liner. An electric heating wire (14) is provided in the cavity (13). The electric heating wire (14) is spirally wound around the outer wall of the inner liner. The top of the heating container (1) is sealed by a sealing top (11). A liquid inlet (12) is provided on the sealing top (11). A heating auxiliary mechanism (2) is rotatably installed on the sealing top (11). One end of the heating auxiliary mechanism (2) extends into the inner liner. During operation, the heating auxiliary mechanism (2) drives the liquid in the side wall area of ​​the inner liner to flow towards the center by rotating.

2. The methyl pyruvate heating device according to claim 1, characterized in that: The heating auxiliary mechanism (2) includes a stirring rod (21) rotatably mounted on a sealing top (11). Two stirring components (26) are arranged on the stirring rod (21) vertically. The stirring component (26) includes a sleeve fitted on the rod body of the stirring rod (21). Several blades are fixedly connected in a ring array on the outer wall of the sleeve. The lower sleeve is fixed near the bottom of the stirring rod (21), and the upper sleeve is slidably mounted on the stirring rod (21).

3. The methyl pyruvate heating device according to claim 2, characterized in that: An outer ring (27) is fixedly connected to the outer side of the four blades. An extension rod (28) is fixedly connected symmetrically to the outer side wall of the outer ring (27). A movable port is opened at one end of the extension rod (28) near the inner liner. A connecting rod (281) is slidably arranged in the movable port. Vertical liquid-dispensing rods (282) are fixedly connected to the upper and lower ends of the connecting rod (281). A slide rod (285) is slidably arranged inside the extension rod (28). One end of the slide rod (285) passes through the extension rod (28) and is connected to the connecting rod (281).

4. The methyl pyruvate heating device according to claim 3, characterized in that: The liquid-dispensing rod (282) has a vertically opened through groove (283), and a scraper (284) is fixed in the through groove (283) with screws. The scraper (284) is set on the side of the liquid-dispensing rod (282) near the inner liner.

5. The methyl pyruvate heating device according to claim 2, characterized in that: An installation groove is provided on the side wall of the stirring rod (21). A reciprocating screw (22) is rotatably installed in the installation groove. A sliding block is threaded onto the reciprocating screw (22). The sliding block slides in the installation groove. A collar located on the upper side is fixedly connected to the sliding block. The rotation of the reciprocating screw (22) drives the collar to move up and down along the axial direction of the stirring rod (21). The upper end of the reciprocating screw (22) passes through the top seat (25) fixed at the top of the stirring rod (21). A motor that drives the reciprocating screw (22) to rotate is installed on the top seat (25).

6. The methyl pyruvate heating device according to claim 5, characterized in that: The upper end of the stirring rod (21) passes through the sealing top (11) and is fixedly provided with a ring block (23). A driven wheel (24) is fixedly installed on the ring block (23). A driving wheel (3) is rotatably installed on the upper side of the sealing top (11). The driven wheel (24) and the driving wheel (3) mesh with each other. The driving wheel (3) is driven by an independent motor.

7. The methyl pyruvate heating device according to claim 6, characterized in that: The heating container (1) has a fixed seat (15) on the outer side of its lower end. A cylinder (4) is installed on the fixed seat (15). The piston end of the cylinder (4) is fixedly connected to the sealing top (11). A sealing strip (16) is provided at the end of the heating container (1). A slot is provided on the lower side of the sealing top (11). When the sealing top (11) seals the heating container (1), the sealing strip (16) engages with the slot.

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