A feeding device for a reaction kettle

Abstract

The utility model provides a kind of reaction kettle feeding device, the device includes nested polytetrafluoroethylene hose and braided tube, gas injection pipe is arranged between the two;The fixed end of polytetrafluoroethylene hose is connected with reaction tank through flange, and its free end is coextensive with gas injection pipe into intermediate barrel. The intermediate barrel is sealed as airtight container by sealing cover and rubber plug combination, and the gas injection pipe is used to inject gas into the intermediate barrel to increase pressure, so that the material is automatically transported along the polytetrafluoroethylene hose to the reaction kettle under the driving of gas pressure, reducing the safety risk and working intensity of manual climbing feeding. At the same time, the optional refrigerant pipe can inhibit the local overheating problem during the transportation of acrylate monomer.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure-sensitive adhesive production equipment, specifically to a reaction kettle feeding device. Background Technology

[0002] Aluminum foil tape typically consists of aluminum foil and pressure-sensitive adhesive layered on one side of the aluminum foil. Among them, acrylic pressure-sensitive adhesives are widely welcomed in the market due to their excellent initial tack, holding power, and weather resistance. However, in the production process of this type of adhesive, the reaction vessel is generally about two meters high, and a large amount of acrylic monomer needs to be injected into the vessel for each feeding. Operators must use ladders to climb to the top of the reaction vessel to complete the feeding operation, which is quite inconvenient.

[0003] Acrylic monomers contain numerous unsaturated double bonds, exhibiting high chemical reactivity and potentially undergoing slow self-polymerization even at room temperature. Prolonged transport or retention within pipelines can accelerate this process due to localized overheating or shear stress, leading to pipe blockage or gelation. Furthermore, shared pipelines can cause cross-contamination of different monomers or residues. Therefore, industrial acrylic pressure-sensitive adhesives typically employ manual or semi-automated feeding methods for easier real-time monitoring and emergency response. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reactor feeding device.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A reaction vessel feeding device includes a polytetrafluoroethylene (PTFE) hose with a braided tube surrounding it. A gas injection pipe is provided between the braided tube and the PTFE hose. The fixed end of the PTFE hose is connected to the reaction vessel via a flange. The free ends of the PTFE hose and the gas injection pipe extend into an intermediate tank. The end of the gas injection pipe away from the PTFE hose passes through the braided tube and is connected to a gas injection pump. The free ends of the PTFE hose and the gas injection pipe are sealed together. A rubber stopper and a sealing cap are fitted around the outer periphery of the braided tube, and the sealing cap enables the intermediate tank to become a sealed container.

[0006] As a preferred technical solution, a T-joint is provided in the middle section of the braided tube, and the air injection tube passes through the T-joint and is connected to the air injection pump.

[0007] As a preferred technical solution, a four-way connector is provided in the middle section of the braided tube, and the four-way connector is also connected to a refrigerant pipe. The refrigerant pipe passes through the four-way connector, passes through the braided tube, and is wound around the outer periphery of the polytetrafluoroethylene hose inside the braided tube. The refrigerant pipe exits the braided tube through the four-way connector and is connected to a cold source. The distance from the free end of the polytetrafluoroethylene hose to the four-way connector is not less than the height of the middle barrel.

[0008] As a preferred technical solution, the sealing cap is threadedly connected to the intermediate barrel, and the rubber plug is located on the side of the sealing cap away from the intermediate barrel.

[0009] As a preferred technical solution, the sealing cap is provided with a through hole in the middle, the braided tube passes through the through hole, and the rubber plug is provided with a sealing cylinder adapted to the gap between the through hole and the braided tube.

[0010] As a preferred technical solution, a spiral sheath is provided between the polytetrafluoroethylene hose and the braided hose.

[0011] As a preferred technical solution, the end of the sealing cylinder is provided with a guide slope.

[0012] As a preferred technical solution, the input end of the gas injection pump is connected to a nitrogen cylinder.

[0013] As a preferred technical solution, the sealing cover is also provided with a pressure relief valve and / or a pressure gauge.

[0014] The advantages and beneficial effects of this invention are as follows: By using a PTFE hose, braided tubing, and intermediate tank, combined with a sealing cap and rubber stopper, the intermediate tank forms a sealed container. Gas is injected into the intermediate tank through the gas injection pipe, pressurizing it. The material then enters the reactor along with the PTFE hose, reducing the need for manual climbing to the top of the reactor for material feeding, thus lowering operational risks and workload. The introduction of a refrigerant pipe further alleviates the gelation problem of acrylate monomers caused by localized overheating, ensuring a safe and stable transportation process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure label: 1-PTFE hose, 2-braided hose, 3-air injection hose, 4-flange, 5-free end, 6-air injection pump, 7-rubber plug, 8-sealing cap, 9-tee fitting, 10-four-way fitting, 11-refrigerant pipe, 12-through hole, 13-sealing cylinder, 14-spiral sheath, 15-guide bevel. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0017] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please see Figures 1-2 This embodiment provides a reactor feeding device, including a polytetrafluoroethylene (PTFE) hose 1, with a braided tube 2 surrounding it. A gas injection pipe 3 is installed between the braided tube 2 and the PTFE hose 1. The fixed end of the PTFE hose 1 is connected to the reactor via a flange 4. The free ends 5 of the PTFE hose 1 and the gas injection pipe 3 extend into an intermediate tank. The end of the gas injection pipe 3 away from the PTFE hose 1 passes through the braided tube 2 and is connected to a gas injection pump 6. The PTFE hose 1 and the free end 5 of the gas injection pipe 3 are sealed together. A rubber stopper 7 and a sealing cap 8 are sequentially fitted around the outer periphery of the braided tube 2, making the intermediate tank a sealed container. Gas is injected into the sealed intermediate tank through the gas injection pipe 3 to pressurize it. Under the action of gas pressure, the material is automatically transported to the reactor along the PTFE hose 1, eliminating the need for manual climbing and significantly reducing operational risks and labor intensity.

[0020] To facilitate the connection of the injection pipe 3 to an external air source and maintain the cleanliness of the pipeline, the technical solution provided in this embodiment is as follows: a tee fitting 9 is provided in the middle section of the braided pipe 2, and the injection pipe 3 passes through the tee fitting 9 and connects to the injection pump 6. The tee fitting 9 serves as a branch connection point, allowing the injection pipe 3 to be smoothly led out and connected to the injection pump 6, avoiding pipeline crossing.

[0021] To prevent acrylate materials from gelling or self-polymerizing due to localized overheating during transportation, the technical solution provided in this embodiment is as follows: A four-way connector 10 is provided in the middle section of the braided tube 2. The four-way connector 10 is also connected to a refrigerant pipe 11. The refrigerant pipe 11 passes through the four-way connector 10, passes through the braided tube 2, and is wound around the outer circumference of the polytetrafluoroethylene (PTFE) flexible hose 1 inside the braided tube 2. The refrigerant pipe 11 exits the braided tube 2 through the four-way connector 10 and is connected to a cold source. The free end 5 of the PTFE flexible hose 1 is at least as long as the height of the intermediate drum from the four-way connector 10. Cold water or other refrigerants (such as ethylene glycol aqueous solution) are introduced into the refrigerant pipe 11 to provide circumferential cooling for the PTFE flexible hose 1, suppressing the temperature rise of the material and preventing blockage and deterioration. The length design of the free end ensures that the hose can move freely inside the drum, avoiding bending or pulling.

[0022] To achieve reliable sealing and rapid opening and closing of the intermediate tank, the technical solution provided in this embodiment is as follows: the sealing cap 8 is threadedly connected to the intermediate tank, and the rubber plug 7 is located on the side of the sealing cap 8 away from the intermediate tank. The threaded connection provides good sealing performance and mechanical strength, and the rubber plug 7 further tightens the gap between the sealing cap 8 and the braided tube 2 to prevent gas leakage.

[0023] To further enhance the sealing effect at the sealing cap 8, the technical solution provided in this embodiment is as follows: a through hole 12 is provided in the middle of the sealing cap 8, the braided tube 2 passes through the through hole 12, and the rubber plug 7 is set as a sealing cylinder 13 that adapts to the gap between the through hole 12 and the braided tube 2. The sealing cylinder 13 fills the gap between the through hole 12 and the braided tube 2, forming a multi-stage sealing structure, which significantly improves the overall airtightness.

[0024] To protect the PTFE hose 1 from being crushed or deformed during high-pressure transmission, the technical solution provided in this embodiment is as follows: a spiral sheath 14 is provided between the PTFE hose 1 and the braided hose 2. The spiral sheath 14 provides support and pressure resistance, preventing the hose from collapsing or twisting and extending its service life.

[0025] To facilitate the installation and positioning of the sealing cylinder 13, the technical solution provided in this embodiment is as follows: a guide slope 15 is provided at the end of the sealing cylinder 13. The guide slope 15 plays a guiding role during assembly, making it easier for the sealing cylinder 13 to be inserted into the through hole 12.

[0026] To ensure the chemical stability of the materials during the feeding process, the technical solution provided in this embodiment is as follows: the input end of the gas injection pump 6 is connected to a nitrogen cylinder. Introducing inert gases such as nitrogen can prevent the materials from contacting oxygen, reducing the risk of oxidation reactions, and is especially suitable for oxygen-sensitive acrylate monomers.

[0027] To monitor and regulate the air pressure inside the intermediate tank and ensure safety during the feeding process, the technical solution provided in this embodiment is as follows: the sealing cover 8 is also equipped with a pressure relief valve and / or a pressure gauge. The pressure gauge displays the pressure inside the tank in real time, and the pressure relief valve automatically releases air when there is overpressure, preventing equipment damage and safety accidents.

[0028] The working principle of this utility model is as follows: the material is placed in an intermediate tank, and the polytetrafluoroethylene (PTFE) hose 1 is inserted into the intermediate tank. The tank is then sealed into a closed container by combining the sealing cap 8 and the rubber stopper 7. The gas injection pump 6 is started, and inert gases such as nitrogen are injected into the intermediate tank through the gas injection pipe 3 to pressurize it. Under the pressure, the material is automatically transported to the reactor along the PTFE hose 1. If the material is sensitive to temperature, the refrigerant circulation system can be started. The refrigerant flows through the refrigerant pipe 11 and cools the PTFE hose 1 to prevent local overheating of the material. The entire feeding process does not require manual climbing and is safe to operate. It is especially suitable for the automated feeding of acrylate monomers.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A feeding device for a reaction vessel, characterized in that, The device includes a polytetrafluoroethylene (PTFE) hose (1) with a braided tube (2) fitted around its outer periphery. A gas injection tube (3) is provided between the braided tube (2) and the PTFE hose (1). The fixed end of the PTFE hose (1) is connected to the reaction vessel via a flange (4). The free ends (5) of the PTFE hose (1) and the gas injection tube (3) extend into the intermediate tank. The end of the gas injection tube (3) away from the PTFE hose (1) passes through the braided tube (2) and is connected to a gas injection pump (6). The free ends (5) of the PTFE hose (1) and the gas injection tube (3) are sealed together. A rubber stopper (7) and a sealing cap (8) are fitted around the outer periphery of the braided tube (2). The sealing cap (8) makes the intermediate tank a sealed container.

2. The reactor feeding device according to claim 1, characterized in that, A tee fitting (9) is provided in the middle section of the braided tube (2), and the air injection tube (3) passes through the tee fitting (9) and is connected to the air injection pump (6).

3. The reactor feeding device according to claim 1, characterized in that, A four-way connector (10) is provided in the middle section of the braided tube (2). The four-way connector (10) is also connected to a refrigerant pipe (11). The refrigerant pipe (11) passes through the four-way connector (10), passes through the braided tube (2), and is wound around the outer periphery of the polytetrafluoroethylene hose (1) inside the braided tube (2). The refrigerant pipe (11) passes through the four-way connector (10) and exits the braided tube (2) and is connected to a cold source. The length of the free end (5) of the polytetrafluoroethylene hose (1) from the four-way connector (10) is not less than the height of the middle barrel.

4. The reactor feeding device according to claim 1, characterized in that, The sealing cap (8) is threadedly connected to the intermediate barrel, and the rubber plug (7) is located on the side of the sealing cap (8) away from the intermediate barrel.

5. The reactor feeding device according to claim 1, characterized in that, The sealing cap (8) has a through hole (12) in the middle, the braided tube (2) passes through the through hole (12), and the rubber plug (7) is configured as a sealing cylinder (13) that adapts to the gap between the through hole (12) and the braided tube (2).

6. The reactor feeding device according to claim 1, characterized in that, A spiral sheath (14) is provided between the polytetrafluoroethylene hose (1) and the braided hose (2).

7. The reactor feeding device according to claim 5, characterized in that, The end of the sealing cylinder (13) is provided with a guide slope (15).

8. The reactor feeding device according to claim 1, characterized in that, The input end of the gas injection pump (6) is connected to a nitrogen cylinder.

9. The reactor feeding device according to claim 1, characterized in that, The sealing cover (8) is also equipped with a pressure relief valve and / or a pressure gauge.

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