A preparation device for facilitating processing of a waterborne epoxy coating curing agent

Abstract

The utility model relates to a kind of preparation device of waterborne epoxy coating curing agent convenient to process, it is related to epoxy coating curing agent preparation equipment technical field, including reaction kettle, the stirring frame of being placed in reaction kettle inside and coaxial rotation with driving part, reaction kettle inner wall is fixed and its both ends extend to the outside of reaction kettle and is provided with protection tube, stirring frame is sleeved on protection tube, first electric heating wire is spirally arranged in protection tube, liner is arranged on reaction kettle inner wall, inner cavity is formed between liner and reaction kettle inner wall, second electric heating wire is spirally arranged in inner cavity.The utility model can form inside and outside wrapping type heating and heat preservation to the material in reaction kettle by the double heating system of built-in protection tube heating and sandwich heating, rapidly promote material core temperature, avoid the material close to kettle wall to appear temperature gradient due to heat dissipation fast, can effectively offset heat loss in material stirring process.

Description

Technical Field

[0001] This application relates to the technical field of epoxy coating curing agent preparation equipment, and in particular to a preparation apparatus that facilitates the processing of water-based epoxy coating curing agents. Background Technology

[0002] Waterborne epoxy coating curing agent is a key component that can chemically react with waterborne epoxy resin, causing it to transform from a liquid or viscous state into a solid three-dimensional network structure coating. The core preparation device for processing waterborne epoxy coating curing agent is a multi-functional reactor. It is not a single-structure device, but a modular system that integrates multiple functions such as stirring, temperature control, material conveying, and exhaust gas treatment, which can meet the needs of key processes such as mixing, reaction, and modification in the curing agent synthesis process.

[0003] Currently, a Chinese utility model patent application with a publication date of July 29, 2025, and publication number CN223162250U, discloses a heat preservation device, including a top cover, and further including: a heat preservation barrel disposed at the bottom of the top cover, a PLC controller disposed on the outside of the heat preservation barrel; a heating component disposed inside the heat preservation barrel, the heating component including a motor fixedly connected to the bottom of the inner cavity of the heat preservation barrel, a transmission rod fixedly connected to the output end of the motor, a first heating tube disposed on the outside of the transmission rod, a side rod fixedly connected to the outside of the first heating tube, and a scraper disposed inside the heat preservation barrel; this utility model, by setting up a heating component, can fully stir the material inside the heat preservation box and heat it evenly, thereby allowing the water-based epoxy curing agent to maintain a constant temperature and prevent it from curing.

[0004] In related technologies, the heating methods of heat preservation devices are mainly divided into two categories: electric heating and water circulation heating. Both require energy or heat source from external devices. Regardless of the method, the heating tube, as a rotating component, must be connected to external fixed components (power supply, water tank, pipeline, etc.) through a dynamic sealing structure. This is prone to problems such as wear and aging of the seals, which may lead to hidden dangers and eventually short circuits, electric shocks, or leakage of the heating solution. At the same time, the heating tube needs to rotate continuously with the stirring mechanism, while the connecting pipes and wires between it and the external device are fixed or low-motion components. There is a natural dynamic conflict between the two in their movement trajectory, which can easily cause motion interference problems.

[0005] Therefore, it is necessary to propose a preparation device that facilitates the processing of waterborne epoxy coating curing agents to solve the above problems. Utility Model Content

[0006] This application provides a device for preparing waterborne epoxy coating curing agents, which is convenient for processing. In order to improve the technical problems existing in the related technology, where the heating tube is directly used as a stirring rod, it is easy to cause electrical short circuits, heating medium leakage and motion interference during the heating process.

[0007] This application provides a device for preparing water-based epoxy coating curing agents, including a reaction vessel and a stirring rack that rotates coaxially with a drive unit inside the reaction vessel. The device is characterized in that a protective tube is fixed to the inner wall of the reaction vessel and extends to the outside of the reaction vessel at both ends; the stirring rack is sleeved on the protective tube; a first electric heating wire is spirally arranged inside the protective tube; an inner liner is provided on the inner wall of the reaction vessel; an inner cavity is formed between the inner liner and the inner wall of the reaction vessel; and a second electric heating wire is spirally arranged inside the inner cavity.

[0008] The technical solution described above in this application embodiment has at least the following technical effects: Since the preparation of water-based epoxy coating curing agents requires temperature control, typically stabilizing at 40-80℃, and demands extremely high mixing uniformity, temperature fluctuations or localized overheating can lead to uneven molecular weight distribution and failure of active groups in the curing agent. This device utilizes a dual heating system—built-in protective tube heating and jacketed heating—to achieve both internal and external envelopment heating and insulation of the materials within the reactor. The first electric heating wire within the protective tube directly heats the central area of ​​the material near the stirring rack, rapidly increasing the core temperature of the material. The second electric heating wire between the inner liner and the reactor wall heats the material from the periphery, preventing temperature gradients near the reactor wall due to rapid heat dissipation. The synergistic effect of the dual heating structure effectively offsets heat loss during material stirring, controlling temperature fluctuations within the reactor to within ±2℃, ensuring the curing agent synthesis reaction remains within the optimal temperature range.

[0009] In this embodiment, the first heating wire and the second heating wire are connected, and the heating is controlled by a control device disposed on the outer wall of the reactor.

[0010] This technical solution ensures that both the first and second heating wires are controlled by a unified control unit, thereby guaranteeing the consistency of internal and external temperatures.

[0011] In this embodiment, the stirring rack includes a central tube and stirring blades disposed at both ends of the central tube. The central tube is sleeved on the protective tube and is rotatably connected to the protective tube.

[0012] This technical solution uses a central tube and two end mixing blades to form a rotating connection between the central tube and the protective tube. It is a precise design for mixing efficiency, equipment adaptability and operational stability. This structure not only solves the spatial conflict between traditional mixing components and heating elements, but also adapts to the high viscosity characteristics of water-based curing agents, achieving uniform mixing.

[0013] In this embodiment, scrapers are provided at both ends of the stirring blade, and the scrapers abut against the inner wall of the inner liner to scrape off the deposits on the inner wall of the inner liner.

[0014] This technical solution involves installing scrapers at both ends of the stirring blades in the water-based epoxy coating curing agent preparation device. These scrapers abut against the inner wall of the inner tank, which is a key optimized design for material residue, temperature uniformity, and product purity. This structure can effectively solve the problem of water-based curing agents easily adhering to the tank wall during heating and stirring.

[0015] In this embodiment, the driving component includes a motor mounted on the outer wall of the reactor and a first pulley that is coaxially driven with the motor. A second pulley is mounted on the output shaft of the central tube, and the second pulley drives the central tube to coaxially drive. The first pulley and the second pulley are driven by a belt.

[0016] Through this technical solution, in the waterborne epoxy coating curing agent preparation device, the driving component adopts a transmission structure in which the motor on the outer wall of the reactor drives the first pulley to rotate the second pulley via a belt. The core is to provide stable and controllable power for the stirring rack.

[0017] In this embodiment, the first heating wire and the second heating wire are covered with protective sleeves on their exposed outer portions to prevent burns.

[0018] This technical solution involves covering the exposed portions of the first and second electric heating wires with protective sleeves in the water-based epoxy coating curing agent preparation device. This is a key detail design for personnel safety and equipment operational stability. This design can effectively solve the safety hazards caused by high temperature or electrical exposure of the exposed portions of the electric heating wires. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of the apparatus for preparing waterborne epoxy coating curing agents provided in the embodiments of this application; Figure 2 A cross-sectional schematic diagram of the apparatus for preparing waterborne epoxy coating curing agents provided in the embodiments of this application; Figure 3 A three-dimensional structural diagram of the first heating wire and the second heating wire communication control element provided in the embodiments of this application.

[0020] The following are the labeling elements in the figure: 1. Reactor; 2. Stirring rack; 21. Central tube; 22. Stirring blade; 23. Scraper; 3. Drive unit; 31. Motor; 32. First pulley; 33. Second pulley; 34. Belt; 4. Protective tube; 41. First electric heating wire; 42. Inner liner; 43. Inner cavity; 44. Second electric heating wire; 45. Control unit. Detailed Implementation

[0021] In related technologies, the heating methods of heat preservation devices are mainly divided into two categories: electric heating and water circulation heating. Both require energy or heat source from external devices. Regardless of the method, the heating tube, as a rotating component, must be connected to external fixed components (power supply, water tank, pipeline, etc.) through a dynamic sealing structure. This is prone to problems such as wear and aging of the seals, which may lead to hidden dangers and eventually short circuits, electric shocks, or leakage of the heating solution. At the same time, the heating tube needs to rotate continuously with the stirring mechanism, while the connecting pipes and wires between it and the external device are fixed or low-motion components. There is a natural dynamic conflict between the two in their movement trajectory, which can easily cause motion interference problems.

[0022] Based on this, in order to improve the technical problems existing in the related technology where the heating tube is directly used as a stirring rod, which is prone to electrical short circuits, heating medium leakage and motion interference during the heating process, the embodiments of this application provide the following solutions.

[0023] Please refer to the following: Figures 1 to 3 This application provides a device for preparing waterborne epoxy coating curing agents that facilitates processing. The device includes a reaction vessel 1 and a stirring rack 2 that is placed inside the reaction vessel 1 and rotates coaxially with a drive component 3. The device is characterized in that a protective tube 4 is fixed to the inner wall of the reaction vessel 1 and extends to the outside of the reaction vessel 1 at both ends. The stirring rack 2 is sleeved on the protective tube 4. A first electric heating wire 41 is spirally arranged inside the protective tube 4. An inner liner 42 is provided on the inner wall of the reaction vessel 1. An inner cavity 43 is formed between the inner liner 42 and the inner wall of the reaction vessel 1. A second electric heating wire 44 is spirally arranged in the inner cavity 43.

[0024] The apparatus provided in this application for preparing waterborne epoxy coating curing agents is designed to facilitate the processing of such agents. Since the preparation of waterborne epoxy coating curing agents requires precise temperature control, typically maintaining a stable temperature of 40-80℃, and demands extremely high mixing uniformity, temperature fluctuations or localized overheating can lead to uneven molecular weight distribution and inactivation of active groups. This apparatus utilizes a dual heating system—a built-in protective tube 4 and a jacketed heating system—to achieve both internal and external envelopment heating and insulation of the materials within the reactor 1. Specifically, the first electric heating wire 41 within the protective tube 4 directly heats the central area of ​​the material near the stirring rack 2, rapidly increasing the core temperature of the material. Meanwhile, the second electric heating wire 44 between the inner liner 42 and the inner wall of the reactor 1 surrounds the material within the reactor. Heating is employed to prevent temperature gradients caused by rapid heat dissipation from materials near the reactor wall. The dual heating structure works synergistically to effectively offset heat loss during material stirring, controlling temperature fluctuations within ±2℃ and ensuring the curing agent synthesis reaction remains within the optimal temperature range. Simultaneously, the first heating wire 41 is placed inside the protective tube 4, and the second heating wire 44 is located in the inner cavity 43 between the inner liner 42 and the reactor body. Neither of these wires directly contacts the water-based curing agent within the reactor 1. This isolated heating design fundamentally cuts off the contact path between the heating elements and corrosive or conductive materials, preventing damage to the heating wires due to material corrosion and preventing leakage of contaminants from the heating elements, thus ensuring the purity and performance stability of the curing agent.

[0025] In this embodiment, the first heating wire 41 and the second heating wire are connected and the heating is controlled by a control component 45 disposed on the outer wall of the reactor 1.

[0026] With this configuration, both the first and second heating wires are controlled by a unified control component 45, ensuring consistent internal and external temperatures. Thus, in the water-based epoxy coating curing agent preparation device, connecting the first electric heating wire 41 (inside the protective tube 4) and the second electric heating wire 44 (inside the inner liner 42 jacket) and unifying their control via the control component 45 on the outer wall of the reactor 1 represents a functional integration and intelligent optimization of the dual heating system. This design not only solves the coordination problem of independent operation of the two heating elements but also improves the practicality of the device in terms of ease of operation, temperature control accuracy, and equipment safety.

[0027] In this embodiment, the stirring rack 2 includes a central tube 21 and stirring blades 22 disposed at both ends of the central tube 21. The central tube 21 is sleeved on the protective tube 4 and is rotatably connected to the protective tube 4.

[0028] This configuration, with the stirring rack 2 featuring a central tube 21 and two end stirring blades 22, and a rotating connection between the central tube 21 and the protective tube 4, represents a precise design for optimal stirring efficiency, equipment adaptability, and operational stability. This structure resolves the spatial conflict between traditional stirring components and heating elements, while also accommodating the high viscosity characteristics of water-based curing agents, achieving uniform mixing. In this setup, the protective tube 4 needs to be fixed to the inner wall of the reactor 1 and has a built-in first electric heating wire 41. If a traditional design with a stirring shaft penetrating the reactor body were used, it would easily cause spatial interference with the protective tube 4. However, by using the central tube 21 to support the protective tube 4, the stirring rack 2 directly uses the fixed protective tube 4 as its support shaft, eliminating the need for an additional independent stirring shaft. This avoids the positional conflict between the protective tube 4 and the heating element, fully utilizes the space in the central area of ​​the reactor 1, and ensures that central heating and central stirring can proceed simultaneously without interference.

[0029] In this embodiment, scrapers 23 are provided at both ends of the stirring blade 22. The scrapers 23 abut against the inner wall of the inner liner 42 and are used to scrape off the deposits on the inner wall of the inner liner 42.

[0030] With this setup, due to the high viscosity and heat sensitivity of water-based epoxy coating curing agents, during the heat preservation and stirring process at 50-80℃, some materials are prone to sticky adhesion or slight curing and crusting due to prolonged contact time with the inner wall of the inner liner 42 and slow local heat dissipation. In the water-based epoxy coating curing agent preparation device, scrapers 23 are set at both ends of the stirring blade 22 to abut against the inner wall of the inner liner 42. This is a key optimized design for material residue, temperature uniformity, and product purity. When the scrapers 23 rotate synchronously with the stirring blade 22, they will form a continuous contact and scraping with the inner wall of the inner liner 42, which can scrape off the curing agent material adhering to the wall surface in real time, allowing it to fall back into the mainstream material in the reactor.

[0031] In this embodiment, the driving component 3 includes a motor 31 mounted on the outer wall of the reactor 1, and a first pulley 32 that is coaxially driven with the motor 31. A second pulley 33 is mounted on the output shaft of the central tube 21. The second pulley 33 drives the central tube 21 to coaxially drive. The first pulley 32 and the second pulley 33 are driven by a belt 34.

[0032] In this configuration, the driving component 3 in the waterborne epoxy coating curing agent preparation device uses a transmission structure where the motor 31 on the outer wall of the reactor 1 drives the first pulley 32 to rotate the second pulley 33 via the belt 34. The core function is to provide stable and controllable power to the stirring frame 2. In contrast, if the traditional driving method uses a motor 31 directly connected to the stirring shaft, the stirring shaft needs to penetrate the wall of the reactor 1, requiring complex dynamic sealing components to prevent material leakage. However, the corrosiveness and viscosity of waterborne curing agents can easily cause rapid wear of the seals, leading to leakage risks. In this design, the motor 31 is fixed to the outer wall of the reactor 1, and through the combination of the first pulley 32, belt 34, and second pulley 33, which are mounted on the output shaft of the central tube 21, non-contact transmission between the motor 31, belt 34, and stirring frame 2 is achieved. This significantly simplifies the sealing structure between the shaft and the reactor body, fundamentally avoiding the core problem of dynamic seal wear and leakage.

[0033] In this embodiment, the first heating wire 41 and the second heating wire 44 are covered with protective sleeves on their exposed outer parts to prevent burns.

[0034] This design, in the water-based epoxy coating curing agent preparation device, involves covering the exposed portions of the first heating wire 41 and the second heating wire 44 with protective sleeves. This is a key design detail for personnel safety and equipment operational stability. This design effectively addresses safety hazards caused by high temperatures or electrical exposure of the exposed heating wires. During the preparation of the water-based epoxy coating curing agent, operators frequently need to approach the reaction vessel 1. Accidental contact with the exposed high-temperature portions of the heating wires can easily cause burns. The protective sleeves form a high-temperature isolation barrier, using the material's low thermal conductivity to block heat transfer from the heating wires to the outside, controlling the surface temperature of the protective sleeves at 30-40℃. Even if operators accidentally touch them, burns can be avoided, fundamentally ensuring personal safety.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A preparation device for facilitating processing of a waterborne epoxy coating curing agent, comprising a reaction kettle (1), a stirring frame (2) coaxially rotating with a driving member (3) inside the reaction kettle (1), characterized in that, The inner wall of the reactor (1) is fixed and its two ends extend to the outside of the reactor (1) and a protective tube (4) is provided. The stirring rack (2) is sleeved on the protective tube (4). A first electric heating wire (41) is spirally arranged inside the protective tube (4). An inner liner (42) is provided on the inner wall of the reactor (1). An inner cavity (43) is formed between the inner liner (42) and the inner wall of the reactor (1). A second electric heating wire (44) is spirally arranged inside the inner cavity (43).

2. The device for preparing a curing agent for waterborne epoxy coating facilitating processing according to claim 1, characterized in that: The first electric heating wire (41) and the second heating wire are connected and the heating is controlled by a control component (45) set on the outer wall of the reactor (1).

3. The device for preparing a curing agent for waterborne epoxy coating facilitating processing according to claim 1 or 2, characterized in that: The stirring rack (2) includes a central tube (21) and stirring blades (22) disposed at both ends of the central tube (21). The central tube (21) is sleeved on the protective tube (4) and is rotatably connected to the protective tube (4).

4. The apparatus for preparing a water-based epoxy coating curing agent according to claim 3, characterized in that: The stirring blade (22) is provided with scrapers (23) at both ends. The scrapers (23) abut against the inner wall of the inner liner (42) to scrape off the attached substances on the inner wall of the inner liner (42).

5. The device for preparing a curing agent for waterborne epoxy coating facilitating processing according to claim 4, characterized in that: The driving component (3) includes a motor (31) mounted on the outer wall of the reactor (1) and a first pulley (32) coaxially driven with the motor (31). A second pulley (33) is mounted on the output shaft of the central tube (21). The second pulley (33) drives the central tube (21) to coaxially drive. The first pulley (32) and the second pulley (33) are driven by a belt (34).

6. The device for preparing a curing agent for waterborne epoxy coating facilitating processing according to claim 1 or 2, characterized in that: The first heating wire (41) and the second heating wire (44) are covered with protective sleeves on their exposed parts to prevent burns.

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