Oxygen isolation structure used in polyurethane packaging process

Abstract

The utility model relates to the technical field of polyurethane material packaging, and discloses an oxygen isolation structure used in a polyurethane packaging process, the oxygen isolation structure comprises a foundation, and the upper surface of the foundation is fixedly connected with a reaction kettle main body. According to the oxygen isolation structure used in the polyurethane packaging process, the material conveying pipe and the fixed sleeve are arranged to form a sealed material conveying channel, and it is ensured that no oxygen contact exists after polyurethane is conveyed into the fixed sleeve and the sliding pipe; meanwhile, a second hydraulic cylinder drives a mounting plate to move, so that an inert gas conveying pipe and a vacuum suction pump form an inert gas conveying and negative pressure suction cooperative system, an oxygen-free environment in the whole filling process is achieved, the problem of oxidative deterioration of polyurethane is solved, and meanwhile, a pressure sensor on a suction pipe is combined to monitor the air pressure change of a packaging barrel in real time; and then the external controller is combined with pressure data of the pressure sensor, so that the air extracting power of the vacuum air extracting pump is adjusted, the internal pressure of the packaging barrel is kept stable, and deformation is avoided.

Description

Technical Field

[0001] This application relates to the field of polyurethane material packaging technology, specifically to an oxygen isolation structure used in the polyurethane packaging process. Background Technology

[0002] Polyurethane materials are widely used in the packaging of food, pharmaceutical, electronic, and industrial products due to their excellent thermal insulation properties, mechanical strength, and chemical stability. During the polyurethane foaming process, the presence of oxygen significantly affects the material's curing reaction.

[0003] Currently, when the polyurethane material mixed in the reactor is loaded into barrels, it is inevitable that the polyurethane material will come into contact with air, which will cause the polyurethane to oxidize, resulting in a darker color, abnormal viscosity, and decreased mechanical properties, thus affecting the material properties of the polyurethane material. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an oxygen isolation structure for polyurethane packaging processes. This structure offers advantages such as synergistic protection with inert gases, ensuring oxygen-free contact of polyurethane materials throughout the entire process from the reactor to the packaging drum, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: an oxygen isolation structure for polyurethane packaging processes, comprising a foundation, a reaction vessel body fixedly connected to the upper surface of the foundation, a conveying pipe fixedly installed on the outside of the reaction vessel body, a support fixedly connected to the upper surface of the foundation, a packaging barrel disposed inside the support, a fixing sleeve fixedly connected to the inner side of the support, a sliding tube slidably connected inside the fixing sleeve, a fixing pressure plate fixedly connected to one end of the sliding tube, an insert tube fixedly connected to the inner side of the fixing pressure plate, and a first [missing information - likely a component or element] fixedly connected to the inner side of the support. The first hydraulic cylinder has a fixed plate fixedly connected to its output end. The fixed plate is fixedly connected to the outside of the sliding tube. A second hydraulic cylinder is fixedly embedded in the upper surface of the bracket. The output end of the second hydraulic cylinder is fixedly connected to a mounting plate. An inert gas supply pipe is fixedly installed on the inner side of the mounting plate. A vacuum pump is fixedly installed on the upper surface of the mounting plate. A suction pipe is fixedly connected to the suction end of the vacuum pump. The outer side of the suction pipe is fixedly connected to the inner side of the mounting plate. A pressure sensor is fixedly connected to the outer side of the suction pipe. The pressure sensor is electrically connected to an external control.

[0006] The above solution establishes a sealed material delivery channel by setting up a delivery pipe and a fixed sleeve, ensuring that the polyurethane is delivered into the fixed sleeve and sliding pipe without oxygen contact. Then, the first hydraulic cylinder drives the fixed plate to move the fixed pressure plate, causing the insertion tube to be inserted into the packaging barrel, thus isolating the polyurethane material from the outside air during delivery. Simultaneously, the second hydraulic cylinder drives the mounting plate to move, forming an inert gas delivery pipe and a vacuum pump to create a coordinated inert gas delivery and negative pressure suction system, achieving an oxygen-free environment throughout the filling process and solving the problem of polyurethane oxidation and deterioration. In addition, the pressure sensor on the suction pipe monitors the changes in air pressure in the packaging barrel in real time. Then, the external controller, based on the pressure data from the pressure sensor, adjusts the suction power of the vacuum pump to ensure that the internal pressure of the packaging barrel remains stable and prevents deformation.

[0007] Furthermore, the material conveying pipe and the fixed sleeve are fixedly connected by a flange.

[0008] The above-mentioned flange-type rigid connection method strengthens the connection strength between the conveying pipe and the fixed sleeve, and avoids the decrease in airtightness caused by interface deformation during material conveying.

[0009] Furthermore, a sealing ring is fixedly connected to the inner side of the fixed sleeve, the inner side of the sealing ring is in contact with the outer side of the sliding tube, and a first sealing gasket is fixedly connected to the inner side of the fixed pressure plate.

[0010] The above solution creates a dynamic sealing layer by setting a sliding contact surface between the sealing ring and the sliding tube, which, together with the secondary sealing of the first sealing gasket at the fixed pressure plate, constructs a double airtight barrier to ensure the sealing of the connection between the two when the tube is inserted into the packaging barrel.

[0011] Furthermore, a second sealing gasket is fitted on the outer side of the inert gas transmission pipe, and a third sealing gasket is fitted on the outer side of the extraction pipe. The outer sides of both the second and third sealing gaskets are fixedly connected to the bottom surface of the mounting plate.

[0012] Through the above scheme, the second sealing gasket's wrap-around seal on the inert gas delivery pipe and the third sealing gasket's annular seal on the extraction pipe form a cross-protection, preventing external oxygen from entering the interior of the packaging barrel.

[0013] Furthermore, one end of the inert gas delivery pipe is fixedly connected to a gas delivery hose, and the outlet end of the vacuum pump is fixedly connected to an exhaust hose.

[0014] Through the above scheme, the air supply hose and exhaust hose connected to the second sealing gasket and the vacuum pump are made to ensure that they are always in close connection with the second sealing gasket and the vacuum pump when the second hydraulic cylinder pushes the mounting plate to move up and down.

[0015] Furthermore, a groove is formed on the upper surface of the foundation, and a trolley is installed inside the groove, with the bottom of the packaging barrel placed on the upper surface of the trolley.

[0016] The above-mentioned solution allows for easy movement of the packaging barrels, making it convenient for staff to adjust their positions.

[0017] Furthermore, two symmetrical guide grooves are formed on the inner side of the empty groove, and the outer surface of the trolley is slidably connected to the inner side of the guide grooves.

[0018] Through the above solution, the trolley in the empty slot and the guide slot work together to realize the movement and positioning of the packaging barrel, which facilitates the adjustment of the packaging barrel's position, reduces manual adjustment and improves work efficiency.

[0019] Furthermore, a steel structure frame is fixedly connected to the upper surface of the foundation, four circumferentially arrayed support blocks are fixedly connected to the outer side of the reactor body, and the outer side of the support blocks is fixedly connected to the outer side of the steel structure frame. The outer side of the reactor body is fixedly connected to the inner side of the steel structure frame, and a feed pipe is fixedly installed on the outer side of the reactor body.

[0020] The above scheme uses a space truss system constructed by setting up a steel frame and support blocks to ensure the stability of the main structure of the reactor.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This oxygen isolation structure for polyurethane packaging processes forms a sealed conveying channel through a conveying pipe and a fixed sleeve, ensuring that the polyurethane is free from oxygen contact after being conveyed into the fixed sleeve and sliding pipe. Then, a first hydraulic cylinder drives a fixed plate to move a fixed pressure plate, inserting a tube into the packaging barrel to isolate the polyurethane material from external air during conveying. Simultaneously, a second hydraulic cylinder drives an installation plate to move, forming an inert gas conveying pipe and a vacuum pump, creating a coordinated inert gas conveying and negative pressure suction system. This achieves an oxygen-free environment throughout the filling process, solving the problem of polyurethane oxidation and deterioration. Furthermore, a pressure sensor on the suction pipe monitors real-time pressure changes in the packaging barrel. An external controller then uses the pressure data from the pressure sensor to adjust the vacuum pump's suction power, ensuring stable internal pressure and preventing deformation of the packaging barrel. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0024] Figure 2 This is a three-dimensional structural diagram of the bracket in this application;

[0025] Figure 3This is a three-dimensional structural diagram of the material conveying pipe, fixed sleeve, and sliding pipe of this application;

[0026] Figure 4 This is a cross-sectional structural diagram of the fixed sleeve and sliding tube of this application;

[0027] Figure 5 This is a three-dimensional structural diagram of the second hydraulic cylinder, mounting plate, inert gas supply pipe, and vacuum pump of this application.

[0028] In the picture:

[0029] 1. Foundation; 2. Reactor body; 3. Feed pipe; 4. Support; 5. Packaging barrel; 6. Fixing sleeve; 7. Sliding pipe; 8. Fixing pressure plate; 9. Insertion pipe; 10. First hydraulic cylinder; 11. Fixing plate; 12. First sealing gasket; 13. Sealing ring; 14. Second hydraulic cylinder; 15. Mounting plate; 16. Inert gas supply pipe; 17. Second sealing gasket; 18. Vacuum pump; 19. Evacuation pipe; 20. Pressure sensor; 21. Third sealing gasket; 22. Empty trough; 23. Guide trough; 24. Trolley; 25. Feed pipe; 26. Steel structure frame; 27. Support block. Detailed Implementation

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

[0031] Please see Figure 2 , Figure 3 and Figure 5An oxygen isolation structure for polyurethane packaging in this embodiment includes a foundation 1, a reactor body 2 fixedly connected to the upper surface of the foundation 1, a conveying pipe 3 fixedly installed on the outside of the reactor body 2, a support 4 fixedly connected to the upper surface of the foundation 1, a packaging barrel 5 inside the support 4, and a fixing sleeve 6 fixedly connected to the inner side of the support 4. The conveying pipe 3 and the fixing sleeve 6 are fixedly connected by a flange. The above-mentioned flange-type rigid connection strengthens the joint strength between the conveying pipe 3 and the fixing sleeve 6, avoiding the decrease in airtightness caused by interface deformation during material conveying. A sliding pipe 7 is slidably connected inside the fixing sleeve 6, and a fixing pressure plate 8 is fixedly connected to one end of the sliding pipe 7. The inner side of the fixing pressure plate 8 is fixedly connected to... The device includes a cannula 9 and a bracket 4. A first hydraulic cylinder 10 is fixedly connected to the inner side of the bracket 4. A fixing plate 11 is fixedly connected to the output end of the first hydraulic cylinder 10. The fixing plate 11 is fixedly connected to the outer side of the sliding tube 7. A second hydraulic cylinder 14 is fixedly embedded in the upper surface of the bracket 4. A mounting plate 15 is fixedly connected to the output end of the second hydraulic cylinder 14. An inert gas delivery pipe 16 is fixedly installed on the inner side of the mounting plate 15. A vacuum pump 18 is fixedly installed on the upper surface of the mounting plate 15. A suction pipe 19 is fixedly connected to the suction end of the vacuum pump 18. The outer side of the suction pipe 19 is fixedly connected to the inner side of the mounting plate 15. A pressure sensor 20 is fixedly connected to the outer side of the suction pipe 19. The pressure sensor 20 is electrically connected to an external control.

[0032] Please see Figure 2 and Figure 4 By setting up a sealed conveying channel between the conveying pipe 3 and the fixed sleeve 6, it is ensured that the polyurethane is not exposed to oxygen after being conveyed into the fixed sleeve 6 and the sliding pipe 7. Then, the first hydraulic cylinder 10 drives the fixed plate 11 to move the fixed pressure plate 8 so that the insertion tube 9 is inserted into the packaging barrel 5, thus isolating the polyurethane material from the outside air during conveying. At the same time, the second hydraulic cylinder 14 drives the mounting plate 15 to move so that the inert gas conveying pipe 16 and the vacuum pump 18 form an inert gas conveying and negative pressure suction coordinated system, realizing an oxygen-free environment throughout the filling process, solving the problem of polyurethane oxidation and deterioration. At the same time, the pressure sensor 20 on the suction pipe 19 monitors the packaging barrel. 5. Real-time monitoring of air pressure changes. Then, the external controller, combined with the pressure data from the pressure sensor 20, adjusts the pumping power of the vacuum pump 18 to ensure that the internal pressure of the packaging barrel 5 remains stable and avoids deformation. A sealing ring 13 is fixedly connected to the inner side of the fixed sleeve 6. The inner side of the sealing ring 13 contacts the outer side of the sliding tube 7. A first sealing gasket 12 is fixedly connected to the inner side of the fixed pressure plate 8. By setting the sliding contact surface between the sealing ring 13 and the sliding tube 7, a dynamic sealing layer is formed. Combined with the secondary sealing of the first sealing gasket 12 at the fixed pressure plate 8, a double airtight barrier is constructed to ensure the sealing of the connection between the two when the insertion tube 9 is inserted into the packaging barrel 5.

[0033] Please see Figure 2 and Figure 5A second sealing gasket 17 is fitted on the outside of the inert gas delivery pipe 16, and a third sealing gasket 21 is fitted on the outside of the extraction pipe 19. The outer sides of the second sealing gasket 17 and the third sealing gasket 21 are both fixedly connected to the bottom surface of the mounting plate 15. The above-mentioned arrangement of the second sealing gasket 17 providing a wrap-around seal for the inert gas delivery pipe 16 and the third sealing gasket 21 providing a ring-shaped seal for the extraction pipe 19 forms a cross-protection, preventing external oxygen from entering the interior of the packaging barrel 5. One end of the inert gas delivery pipe 16 is fixedly connected to a gas delivery hose, and the outlet end of the vacuum pump 18 is fixedly connected to an exhaust hose. The above-mentioned arrangement of the gas delivery hose and exhaust hose connected to the second sealing gasket 17 and the vacuum pump 18 ensures that when the second hydraulic cylinder 14 pushes the mounting plate 15 to move up and down, both of them are always in close connection with the second sealing gasket 17 and the vacuum pump 18.

[0034] Please see Figure 1 and Figure 2 A groove 22 is formed on the upper surface of the foundation 1. A trolley 24 is installed inside the groove 22. The bottom of the packaging barrel 5 is placed on the upper surface of the trolley 24. The trolley 24 facilitates the movement of the packaging barrel 5, making it convenient for staff to adjust its position. Two symmetrical guide grooves 23 are formed on the inner side of the groove 22. The outer surface of the trolley 24 is slidably connected to the inner side of the guide grooves 23. The guide cooperation between the trolley 24 and the guide grooves 23 in the groove 22 enables the movement and positioning of the packaging barrel 5, facilitating its movement. The position adjustment reduces manual adjustment and improves work efficiency. A steel structure frame 26 is fixedly connected to the upper surface of the foundation 1. Four circular array of support blocks 27 are fixedly connected to the outside of the reactor body 2. The outside of the support blocks 27 is fixedly connected to the outside of the steel structure frame 26. The outside of the reactor body 2 is fixedly connected to the inside of the steel structure frame 26. A feed pipe 25 is fixedly installed on the outside of the reactor body 2. By setting up the steel structure frame 26 and the support blocks 27 to construct a space truss system, the structural stability of the reactor body 2 is ensured.

[0035] This embodiment provides an oxygen isolation structure for polyurethane packaging. By setting up a sealed conveying channel between the conveying pipe 3 and the fixed sleeve 6, it ensures that the polyurethane is not exposed to oxygen after being conveyed into the fixed sleeve 6 and the sliding pipe 7. Then, the first hydraulic cylinder 10 drives the fixed plate 11 to move the fixed pressure plate 8 so that its insertion tube 9 is inserted into the packaging barrel 5, thus isolating the polyurethane material from the outside air during conveying. At the same time, the second hydraulic cylinder 14 drives the mounting plate 15 to move, so that its inert gas conveying pipe 16 and vacuum pump 18 form an inert gas conveying and negative pressure suction coordinated system, realizing an oxygen-free environment throughout the filling process and solving the problem of polyurethane oxidation and deterioration. In addition, the pressure sensor 20 on the suction pipe 19 monitors the pressure changes of the packaging barrel 5 in real time. Then, the external controller, based on the pressure data of the pressure sensor 20, adjusts the suction power of the vacuum pump 18 to ensure that the internal pressure of the packaging barrel 5 remains stable and avoids deformation.

[0036] The working principle of the above embodiment is as follows: First, the packaging barrel 5 is placed on the trolley 24. Then, the trolley 24 is pushed to move to the inside of the bracket 4, so that the insertion tube 9, the inert gas delivery tube 16, and the suction tube 19 are connected to the connection hole on the packaging barrel 5. Then, the first hydraulic cylinder 10 drives the fixing plate 11 to drive the sliding tube 7 to drive the fixing pressure plate 8 to insert the insertion tube 9 into the inside of the packaging barrel 5. At the same time as insertion, the first sealing gasket 12 seals the connection between the packaging barrel 5 and the insertion tube 9. Then, the second hydraulic cylinder 14 drives the mounting plate 15 to insert the inert gas delivery tube 16 and the suction tube 19 into the inside of the packaging barrel 5. The second sealing gasket 17 and the third sealing gasket 21 compress and seal the connection with the packaging barrel 5. After sealing, the vacuum pump 18 is driven to remove oxygen from the inside of the packaging barrel 5. At the same time, inert gas is delivered to the inside of the packaging barrel 5 through the gas delivery hose to the inert gas delivery pipe 16, so that the inside of the packaging barrel 5 is filled with inert gas. Finally, when the polyurethane material is delivered to the inside of the packaging barrel 5 from the delivery pipe 3, the fixed sleeve 6, the sliding pipe 7, and the insertion pipe 9, the inert gas can protect the polyurethane material and prevent the material from contacting oxygen. At this time, the pressure inside the packaging barrel 5 changes while the material is being delivered. At this time, the pressure sensor 20 can monitor the pressure in real time. At this time, the vacuum pump 18 can extract the gas inside the packaging barrel 5 to keep the pressure inside the packaging barrel 5 at a constant normal pressure.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oxygen barrier structure for use in a polyurethane packaging process, comprising a foundation (1), characterised in that: The upper surface of the foundation (1) is fixedly connected with a reaction kettle body (2), the outside of the reaction kettle body (2) is fixedly installed with a feeding pipe (3), the upper surface of the foundation (1) is fixedly connected with a support (4), the inside of the support (4) is provided with a packaging barrel (5), the inside of the support (4) is fixedly connected with a fixed sleeve (6), the inside of the fixed sleeve (6) is slidably connected with a sliding pipe (7), one end of the sliding pipe (7) is fixedly connected with a fixed pressing plate (8), the inside of the fixed pressing plate (8) is fixedly connected with a cannula (9), the inside of the support (4) is fixedly connected with a first hydraulic cylinder (10), the output end of the first hydraulic cylinder (10) is fixedly connected with a fixed plate (11), the fixed plate (11) is fixedly connected to the outside of the sliding pipe (7), the upper surface of the support (4) is fixedly embedded with a second hydraulic cylinder (14), the output end of the second hydraulic cylinder (14) is fixedly connected with a mounting plate (15), the inside of the mounting plate (15) is fixedly installed with an inert gas gas pipe (16), the upper surface of the mounting plate (15) is fixedly installed with a vacuum air pump (18), the suction end of the vacuum air pump (18) is fixedly connected with an air exhaust pipe (19), the outside of the air exhaust pipe (19) is fixedly connected to the inside of the mounting plate (15), the outside of the air exhaust pipe (19) is fixedly connected with a pressure sensor (20), and the pressure sensor (20) is electrically connected with the outside.

2. An oxygen barrier structure for use in a polyurethane packaging process according to claim 1, characterized in that: The feeding pipe (3) and the fixed sleeve (6) are fixedly connected through flanges.

3. An oxygen barrier structure for use in polyurethane packaging processes according to claim 1, characterized in that: The inside of the fixed sleeve (6) is fixedly connected with a sealing ring (13), the inside of the sealing ring (13) is in contact with the outside of the sliding pipe (7), and the inside of the fixed pressing plate (8) is fixedly connected with a first sealing gasket (12).

4. An oxygen barrier structure for use in polyurethane packaging processes according to claim 1, characterized in that: The outside of the inert gas gas pipe (16) is sleeved with a second sealing gasket (17), the outside of the air exhaust pipe (19) is sleeved with a third sealing gasket (21), and the outside of the second sealing gasket (17) and the third sealing gasket (21) is fixedly connected to the bottom surface of the mounting plate (15).

5. An oxygen barrier structure for use in polyurethane packaging processes according to claim 1, characterized in that: One end of the inert gas gas pipe (16) is fixedly connected with a gas hose, and the gas outlet end of the vacuum air pump (18) is fixedly connected with an exhaust hose.

6. An oxygen barrier structure for use in polyurethane packaging processes according to claim 1, characterized in that: The upper surface of the foundation (1) is provided with an empty groove (22), the inside of the empty groove (22) is provided with a cart (24), and the bottom of the packaging barrel (5) is placed on the upper surface of the cart (24).

7. An oxygen barrier structure for use in a polyurethane packaging process according to claim 6, characterized in that: The inside of the empty groove (22) is provided with two symmetrical guide grooves (23), and the outer surface of the cart (24) is slidably connected to the inside of the guide grooves (23).

8. An oxygen barrier structure for use in polyurethane packaging processes according to claim 1, characterized in that: The upper surface of the foundation (1) is fixedly connected with a steel structure frame (26), the outside of the reaction kettle body (2) is fixedly connected with four circumferentially arranged supporting blocks (27), the outside of the supporting blocks (27) is fixedly connected to the outside of the steel structure frame (26), the outside of the reaction kettle body (2) is fixedly connected to the inside of the steel structure frame (26), and the outside of the reaction kettle body (2) is fixedly installed with a feeding pipe (25).

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