High-flexibility insulating crepe paper tube and preparation process thereof

Abstract

The invention relates to the technical field of material science and engineering, in particular to a high-flexibility insulating crepe paper tube and a preparation technology.The dipping device comprises a supporting frame, a frame is fixedly connected to the top of the supporting frame, a vacuum pump is arranged at the bottom of the frame, and the suction end of the vacuum pump communicates with the inner bottom of the frame through a valve; the side face of the frame body is connected with a valve, and the other end of the valve is connected with a connecting pipe. Hydraulic cylinders are fixedly connected to the side walls of the front end and the rear end of the frame body, fixedly connected with the limiting assembly and used for adjusting the Y-axis height of the limiting assembly. The suction pump is controlled to extract air to enter the transmission cavity, then the air sequentially passes through the flow guide cavity to enter the space between the inner barrel and the elastic film, the elastic film is expanded, the elastic film is expanded and can make contact with the inner diameter surface of the paper tube, and when the interior of the paper tube is full of resin, the elastic film is expanded and can discharge the resin in the paper tube outwards; and then the suction pump is controlled to suck back air in the elastic film.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material science and engineering technology, and particularly relates to a high-flexibility insulating corrugated paper tube and a preparation process. BACKGROUND

[0002] The insulating corrugated paper tube is a tubular insulating material processed from the electrical corrugated insulating paper through a special process, and is mainly used for the insulating wrapping of wires in oil-immersed transformers, motors and other high-voltage electrical equipment. Such material needs to have excellent electrical insulation, mechanical strength and environmental resistance to ensure the long-term stable operation of the equipment under complex working conditions. The traditional corrugated paper tube is rolled from the cellulose-based corrugated paper, and the corrugated structure can provide a certain degree of ductility and compressibility, facilitating the bending installation.

[0003] The patent with the publication (announcement) number CN116752376A discloses an impregnation system for paper tube production, which comprises a base plate, and the base plate is sequentially provided with a feeding device, an impregnation device and a discharging device. The feeding device comprises a conveying component and a pushing component. The impregnation device comprises an impregnation tank arranged on the base plate, and the impregnation tank is provided with an inclinable lifting component. The impregnation tank is provided with a support above the impregnation tank, and the support is provided with a rolling component. The base plate is provided with a liquid supply device, and the liquid supply device comprises a filtering component and a liquid storage component. The liquid supply device supplements the impregnation tank with impregnation liquid and recovers waste liquid.

[0004] The above-mentioned existing patent and traditional impregnation equipment have the following problems: when the paper tube is placed in the device for soaking, the paper tube is in contact with the resin. Since the paper tube is hollow, and the resin needs to be kept at a certain temperature, the temperature of the resin solution in contact with the inner wall surface of the paper tube is not consistent, which affects the product quality. SUMMARY

[0005] Therefore, the present application provides a high-flexibility insulating corrugated paper tube and a preparation process to solve the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a high-flexibility insulating corrugated paper tube and a preparation process, comprising the following steps: Step one: preparation of raw paper: selecting the required insulating raw paper for pretreatment; Step two: corrugated forming: the raw paper is processed and formed through the steel press roller on the corrugating machine; the corrugated paper needs to be cooled and shaped after forming; Step three: tube rolling: the corrugated paper is rolled into a tubular shape on the tube rolling machine; Step four: impregnation: the paper tube is placed in the impregnation device, the air and moisture in the gap between the tube and the paper fiber are removed by vacuumizing, and then the resin is injected under vacuum or pressure to ensure that the resin fully penetrates into the corrugated structure and the fibers of each layer of paper; Step five: curing: the impregnated paper tube is transferred to a curing oven; Step six: post-processing: Demolding: machining: cleaning, inspection, surface treatment, coating with moisture-proof paint, marking, etc.

[0007] Preferably, the impregnation device comprises a support frame, the top of which is fixedly connected with a frame body, the bottom of which is provided with a vacuum pump, the suction end of which is communicated with the inner bottom of the frame body through a valve, and the side of the frame body is connected with a valve, the other end of which is connected with a connecting pipe.

[0008] Preferably, the side wall of the frame body is fixedly connected with a hydraulic cylinder at the front and rear ends, and the hydraulic cylinder is fixedly connected with a limiting assembly, and the hydraulic cylinder is used to adjust the Y-axis height of the limiting assembly. The limiting assembly comprises a frame, the telescopic end of the hydraulic cylinder is fixedly connected with the frame, a connecting frame is rotatably connected to the frame, a gear ring is fixedly connected to the outer peripheral wall of the connecting frame, a connecting plate is fixedly connected to the side wall of the frame, the outer shell of the driving motor is fixedly connected with the connecting plate, the output shaft of the driving motor is fixedly connected with a driving gear, and the driving gear is engaged with the gear ring.

[0009] Preferably, the inside of the connecting frame is hollow to form a heating cavity, an electric heating wire and a temperature sensor are arranged in the heating cavity, the electric heating wire is used to heat the air in the inner space, and the temperature sensor is used to sense the temperature of the air, a hollow column is fixedly connected to the center of the connecting frame, the center of the hollow column is rotatably connected with the transmission shaft, a transmission cavity is formed between the inner side wall of the hollow column and the outer peripheral wall of the transmission shaft, a suction pump is bolted in the heating cavity, one end of the suction pump is connected with the transmission cavity, and the bottom of the hollow column is fixedly connected with the bottom frame.

[0010] Preferably, the bottom frame is hollow to form a flow guide cavity, and the flow guide cavity is communicated with the transmission cavity, the flow guide cavity is connected with the upper end of the adjusting assembly, and the first tooth ring, the second tooth ring and the third tooth ring are rotatably connected in the flow guide cavity.

[0011] Preferably, the adjusting assembly comprises a rotating cylinder, the upper end of the rotating cylinder is rotatably connected with the bottom of the bottom frame, the upper end of the rotating cylinder is located in the flow guide cavity in the bottom frame, and the upper end of the rotating cylinder is fixedly connected with a matching gear.

[0012] Preferably, a plurality of matching gears are respectively engaged with the first tooth ring, the second tooth ring and the third tooth ring, the side wall of the rotating cylinder is bolted with a contact rod, and the bottom of the flow guide cavity is fixedly connected with the upper end of the inner cylinder through a 7-shaped connecting rod.

[0013] Preferably, the inner cylinder outer peripheral wall is fixedly connected with an elastic membrane, and a gap is formed between the elastic membrane and the inner cylinder outer peripheral wall.

[0014] Preferably, the inner cylinder outer peripheral wall is provided with a plurality of through holes, so that the inner space of the inner cylinder is communicated with the gap between the elastic membrane and the inner cylinder.

[0015] A high-flexibility insulating corrugated paper tube is prepared by using the preparation process of the high-flexibility insulating corrugated paper tube.

[0016] The present application has the following beneficial effects: The present application has the following beneficial effects:

[0017] The present application has the following beneficial effects:

[0018] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a process flow structure schematic diagram of the present application.

[0020] Figure 2 It is a structure schematic diagram of the impregnation device of the present application.

[0021] Figure 3 It is a structure schematic diagram of the frame of the present application.

[0022] Figure 4 It is a structure schematic diagram of the frame of the present application.

[0023] Figure 5It is the schematic diagram of the profile structure of the adapter frame of the application.

[0024] Figure 6 It is the schematic diagram of the structure of the guide cavity of the application.

[0025] Figure 7 It is the sectional view of the guide cavity of the application.

[0026] Figure 8 It is the schematic diagram of the structure of the adjusting assembly of the application Figure 1 .

[0027] Figure 9 It is the schematic diagram of the structure of the adjusting assembly of the application Figure 2 .

[0028] Wherein: support frame-1, frame-2, vacuum pump-3, valve-4, connecting pipe-5, hydraulic cylinder-6, limiting assembly-7, frame-71, adapter frame-72, gear ring-73, connecting plate-74, drive motor-75, drive gear-76, heating cavity-721, electric heating wire-722, suction pump-723, hollow column-724, transmission shaft-725, transmission cavity-726, bottom frame-727, temperature sensor-728, guide cavity-7271, adjusting assembly-7272, first gear ring-7273, second gear ring-7274, third gear ring-7275, connecting rod-7276, rotating cylinder-72721, matching gear-72722, contact rod-72723, inner cylinder-72724, elastic film-72725. DETAILED DESCRIPTION

[0029] In order to further explain the technical scheme of the application, the following specific embodiments are described in detail.

[0030] As Figure 1 shown, the application provides a high-flexibility insulating corrugated paper tube and a preparation process, which comprises the following steps. Step one: preparation of raw paper Select the required insulating raw paper (roll) for pretreatment: such as moisture adjustment (control the moisture content to facilitate the formation of corrugations), surface treatment (improve the resin infiltration) or pre-coating; Step two: corrugation formation Use a special corrugation machine, and the raw paper passes through one or more pairs of heated steel rollers with specific tooth shapes (determine the corrugation waveform); Process parameter control Temperature: soften and plasticize the paper to facilitate the extrusion of permanent corrugations, too low temperature will not make the corrugation firm, and too high temperature may cause scorching; pressure: ensure clear and uniform corrugations; speed: affect production efficiency and heating time; tension: control the flatness and uniformity of the corrugated paper during the corrugation process; the corrugated paper needs to be cooled and shaped after formation; Step 3: Rolling the corrugated paper tape into a tube shape on a tube rolling machine; Rolling the corrugated paper tape into a tube shape on a tube rolling machine; Key controls: Winding tension: The tension must be uniform and moderate; excessive tension can easily crush wrinkles and make the layers too tight, affecting impregnation and flexibility; excessive tension can result in loose tube walls and low strength; Overlap method: flat or bevel; bevel can improve bonding strength and smoothness; Number of layers: determined by the required wall thickness and strength; Mandrel size and shape: determines the inner diameter of the paper tube; a demoulding mandrel may be required; after winding is completed, the joints may require gluing or hot pressing for initial fixation.

[0031] Step 4: Dipping; Vacuum Pressure Impregnation (VPI): The paper tube is placed in an impregnation device, where a vacuum is drawn to remove air and moisture from the tube and the gaps between the paper fibers. Resin is then injected under vacuum or pressure to ensure that the resin fully penetrates the wrinkle structure and the fibers of each layer of paper. Step 5: Curing: Transfer the impregnated paper tube to the curing furnace (oven or drying tunnel); strictly follow the curing curve of the resin system: heating and holding in stages; control the following points: heating rate (to avoid rapid evaporation of the solvent or violent reaction of the resin causing bubbles / cracking), temperature at each stage, holding time, and rotate the tube if necessary to ensure uniform heating and curing; curing causes the resin to undergo a cross-linking reaction to form a strong, insulating, and flexible solid structure.

[0032] Step 6: Post-processing: demoulding; if a mandrel is used, remove it; machining: turning / cutting the end face, processing the inner and outer diameters, grooving, etc. according to the drawing requirements; cleaning: removing surface burrs and excess resin; inspection: size, appearance, and electrical performance inspection when necessary; surface treatment: applying moisture-proof paint, marking, etc.

[0033] like Figure 2 As shown, in this embodiment; the impregnation device includes a support frame 1, a frame 2 is fixedly connected to the top of the support frame 1, a vacuum pump 3 is provided at the bottom of the frame 2, the vacuum pump 3 is used to extract the air in the frame 2, so that a vacuum state is formed in the frame 2, and the suction end of the vacuum pump 3 is connected to the bottom of the frame 2 through a valve 4, a valve 4 is connected to the side of the frame 2, and the other end of the valve 4 is connected to a connecting pipe 5; the connecting pipe 5 is used to transport resin, so that the resin enters the interior of the frame 2 through the valve 4, and then the interior of the frame 2 is filled with resin, and the resin can wrap the paper tube inside; a pressure relief valve is provided on the side wall of the frame 2, and the air pressure inside the frame 2 is relieved through the pressure relief valve; Among them, the front and rear side walls of the frame 2 are fixedly connected with a hydraulic cylinder 6, which is fixedly connected to the limiting component 7. The hydraulic cylinder 6 is used to adjust the Y-axis height of the limiting component 7; In the embodiment, the front end of the frame 2 is provided with a controller, the controller is electrically connected with the electric components, and the controller is used for conveniently controlling the operation of the electric components; the frame 2 is provided with electric heating wires and a temperature sensor, which are used for heating and temperature detection of the resin in the frame 2.

[0034] As shown in Figures 2-4 In the embodiment, the limiting assembly 7 comprises a frame 71, the bottom of the frame 71 is provided with a rubber layer, the rubber layer is used for extrusion contact with the top of the frame 2, the frame 71 is fixedly connected with the telescopic end of the hydraulic cylinder 6, the hydraulic cylinder 6 is used for adjusting the height of the frame 71, the frame 71 is rotatably connected with a connecting frame 72, the outer circumferential wall of the connecting frame 72 is fixedly connected with a gear ring 73, the side wall of the frame 71 is fixedly connected with a connecting plate 74, the connecting plate 74 is fixedly connected with the shell of a driving motor 75, the output shaft of the driving motor 75 is fixedly connected with a driving gear 76, and the driving gear 76 is engaged with the gear ring 73; the connecting frame 72 is hollow and forms a heating cavity 721, the heating cavity 721 is provided with electric heating wires 722 and a temperature sensor 728, the electric heating wires 722 are used for heating the air in the inner space, and the temperature sensor 728 is used for sensing the temperature of the air, a hollow column 724 is fixedly connected with the center of the connecting frame 72, the center of the hollow column 724 is rotatably connected with a transmission shaft 725, a transmission cavity 726 is formed between the inner side wall of the hollow column 724 and the outer circumferential wall of the transmission shaft 725, a suction pump 723 is screw-connected in the heating cavity 721, one end of the suction pump 723 is connected with the transmission cavity 726, and the bottom of the hollow column 724 is fixedly connected with a bottom frame 727. Specifically, the suction pump 723 is used for conducting the air to the flow guide cavity 7271, conducting the air in the flow guide cavity 7271 to the inner space of the inner cylinder 72724, and then filling the inner space of the inner cylinder 72724 with the air and expanding the elastic film 72725. The transmission shaft 725 is connected with a servo motor, the servo motor is used for driving the transmission shaft 725 to rotate, and the transmission shaft 725 can drive the first gear ring 7273, the second gear ring 7274 and the third gear ring 7275 to rotate.

[0035] As shown in Figures 6-9 In the embodiment, the bottom frame 727 is hollow and forms a flow guide cavity 7271, the flow guide cavity 7271 is communicated with the transmission cavity 726, the flow guide cavity 7271 is connected with the upper end of an adjusting assembly 7272, the flow guide cavity 7271 is rotatably connected with a first gear ring 7273, a second gear ring 7274 and a third gear ring 7275, the first gear ring 7273, the second gear ring 7274 and the third gear ring 7275 are connected into an integrated whole through a connecting rod 7276, and one end of the connecting rod 7276 is fixedly connected with the transmission shaft 725. The adjusting assembly 7272 comprises a rotating cylinder 72721, the upper end of the rotating cylinder 72721 is rotationally connected with the bottom of the bottom frame 727, and the upper end of the rotating cylinder 72721 is located in the flow guide cavity 7271 in the bottom frame 727, the upper end of the rotating cylinder 72721 is fixedly connected with a matching gear 72722, a plurality of matching gears 72722 are respectively engaged with the first tooth ring 7273, the second tooth ring 7274 and the third tooth ring 7275, and the side wall of the rotating cylinder 72721 is bolted with a contact rod 72723; The bottom of the flow guide cavity 7271 is fixedly connected with the upper end side wall of the inner cylinder 72724 through a 7-shaped connecting rod, so that the inner cylinder 72724 can be coaxially arranged with the rotating cylinder 72721, the height of the top of the inner cylinder 72724 and the top of the 7-shaped connecting rod is lower than the bottom of the connecting rod 7276, so that the connecting rod 7276 is not contacted during rotation, the outer peripheral wall of the inner cylinder 72724 is fixedly connected with an elastic film 72725, there is a gap between the elastic film 72725 and the outer peripheral wall of the inner cylinder 72724, a plurality of through holes are arranged on the outer peripheral wall of the inner cylinder 72724, so that the space in the inner cylinder 72724 is communicated with the gap between the elastic film 72725 and the inner cylinder 72724, and a plurality of through holes are arranged on the outer peripheral wall of the inner cylinder 72724 located in the flow guide cavity 7271, so that the space in the inner cylinder 72724 is communicated with the flow guide cavity 7271. Specifically, a plurality of adjusting assemblies 7272 are arranged on the bottom of the bottom frame 727 in a circular ring structure, and the adjusting assembly 7272 is used for limiting the position of the paper tube, so that the paper tube is vertically limited in the frame body 2.

[0036] The present application provides a kind of high flexibility's insulating corrugated paper tube and preparation process, when paper tube is soaked, control hydraulic cylinder 6 to push frame 71 to move upwards, then hollow area in paper tube is inserted into inner cylinder 72724 one by one, so that paper tube is equidistant in frame body 2 inside, then control hydraulic cylinder 6 to drive frame 71 to move downwards, so that frame 71 closes and seals the top of frame body 2, opens vacuum pump 3 to extract air in frame body 2 inside, so that frame body 2 inside is in vacuum state; Resin is delivered to frame body 2 inside by connecting pipe 5 and valve 4 until paper tube is completely submerged (liquid level is higher than top by more than 10 cm), and the temperature of the resin is kept constant at 40-50℃. Turn on the electric heating wire 722 to heat the inside of the heating cavity 721, monitor the temperature in the heating cavity 721 by the temperature sensor 728, and stop the operation of the electric heating wire 722 when the temperature reaches a suitable temperature, so that the temperature in the heating cavity 721 is maintained at a certain temperature. The suction pump 723 is controlled to draw air into the transmission cavity 726, and then into the inner cylinder 72724 and the elastic membrane 72725 in turn through the flow guide cavity 7271, so that the elastic membrane 72725 is inflated. The elastic membrane 72725 is inflated and can be in contact with the inner diameter surface of the paper tube. When the inside of the paper tube is filled with resin, the elastic membrane 72725 is inflated and can expel the resin in the paper tube outward. Then the suction pump 723 is controlled to suck the air in the elastic membrane 72725, so that the elastic membrane 72725 shrinks. The resin between the inner walls of the paper tube is repeatedly extruded, and the resin between the inner walls of the paper tube can flow. The elastic membrane 72725 extrudes the inner wall of the paper tube. Since the air in the elastic membrane 72725 is hot air, the elastic membrane 72725 can increase the temperature between the inner wall of the paper tube and the resin through heat transfer, and can adjust the temperature of the inner wall of the paper tube to 40-50℃, avoiding the difference in temperature between the resin between the inner wall of the paper tube and the outer wall of the paper tube. The servo motor can be turned on to drive the transmission shaft 725 to rotate, the transmission shaft 725 drives the connecting rod 7276 to rotate, the connecting rod 7276 drives the first gear ring 7273, the second gear ring 7274 and the third gear ring 7275 to rotate, the first gear ring 7273, the second gear ring 7274 and the third gear ring 7275 drive the matching gear 72722 connected thereto to rotate respectively, the matching gear 72722 drives the rotating cylinder 72721 to rotate, the rotating cylinder 72721 drives the contact rod 72723 to rotate, so that the contact rod 72723 rotates with the center of the paper tube as the origin. The contact rod 72723 rotates around the paper tube and can independently stir around a single paper tube (and the driving motor 75 can be controlled to drive the gear 76 to rotate, the gear 73 drives the adapter frame 72 to rotate, the adapter frame 72 drives the contact rod 72723 to rotate with the center of the frame 2 as the rotation point). The driving motor 75 can be turned on to drive the driving gear 76 to rotate, the driving gear 76 drives the gear 73 to rotate, the gear 73 drives the adapter frame 72 to rotate, the adapter frame 72 drives the bottom frame 727 to rotate through the hollow column 724. The bottom frame 727 drives the inner cylinder 72724 and the contact rod 72723 to rotate at the same time, and can drive the paper tube to rotate slowly in the frame 2. After processing, the frame 2 is slowly depressurized to normal pressure through the pressure relief valve, and the resin in the frame 2 is sucked back to the device outside through the connecting pipe 5 and the valve 4. The hydraulic cylinder 6 pushes the frame 71 to move upward, the frame 71 drives the inner cylinder 72724 to move upward as a whole, the inner cylinder 72724 can lift the paper tube upward with the assistance of the elastic membrane 72725, so that the paper tube is separated from the resin in the frame 2, and is suspended for 30-60 minutes to drain the surface float glue. Subsequently, the paper tube is transferred to a drying area, and is sent into a 70-90℃ circulating air drying channel to be pre-solidified for 1-2 hours.

[0037] The application improves the impregnation uniformity, resin bonding strength and flexibility of the insulating corrugated paper tube, and optimizes the surface quality and curing effect by setting the limiting assembly 7 with the synergistic effect of dynamic extrusion, thermal synchronous control and precise stirring.

[0038] The application controls the suction pump 723 to draw air into the transmission cavity 726, and then into the space between the inner cylinder 72724 and the elastic film 72725 through the flow guide cavity 7271 in sequence, so that the elastic film 72725 expands, the elastic film 72725 expands and can contact the inner diameter surface of the paper tube, when the paper tube is full of resin, the elastic film 72725 expands and can discharge the resin in the paper tube outward, then the suction pump 723 controls the air in the elastic film 72725 to be drawn back, so that the elastic film 72725 shrinks, and reciprocates in this way to apply periodic pressure to the inner wall of the paper tube, promote the uniform distribution of resin between fibers and remove excess resin, avoid the increase of brittleness after curing, at the same time, the hot air transmits heat through the elastic film 72725, so that the temperature inside and outside the paper tube is consistent, prevent internal stress caused by temperature difference, and improve bending flexibility.

[0039] The above only describes the preferred examples of the application and is not used to limit the application, although the application is described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A process for preparing a highly flexible insulating crepe paper tube, characterized by: The following steps are involved: Step 1: Base paper preparation: Select insulation base paper that meets the requirements and pre-treat it; Step 2: Crepe forming: The base paper is formed by the steel pressing rollers on the crepe machine. After forming, the crepe paper needs to be cooled and set; Step 3: Tube rolling: roll the crepe paper tape into a tube on a tube rolling machine; Step 4: Impregnation: Place the paper tube into the impregnation device, vacuum the tube and remove the air and moisture in the gaps between the paper fibers, then inject the resin under vacuum or pressure to ensure that the resin fully penetrates the wrinkle structure and the fibers of each layer of paper; Step 5: Curing: Transfer the impregnated paper tube to the curing oven; Step 6: Post-processing: demoulding, machining, cleaning, inspection, surface treatment, coating of moisture-proof paint, marking, etc.

2. The process for preparing a highly flexible insulating crepe paper tube according to claim 1, characterized in that: The impregnation device comprises a support frame (1), the top of the support frame (1) is fixedly connected to a frame (2), the bottom of the frame (2) is provided with a vacuum pump (3), the suction end of the vacuum pump (3) is connected to the bottom of the frame (2) through a valve (4), the side of the frame (2) is connected to a valve (4), and the other end of the valve (4) is connected to a connecting pipe (5).

3. The process for preparing a highly flexible insulating crepe paper tube according to claim 2, characterized in that: The front and rear side walls of the frame (2) are fixedly connected to hydraulic cylinders (6), the hydraulic cylinders (6) are fixedly connected to the limiting assembly (7), and the hydraulic cylinders (6) are used to adjust the Y-axis height of the limiting assembly (7); The limiting assembly (7) includes a frame (71), the frame (71) is fixedly connected to the telescopic end of the hydraulic cylinder (6), a connecting frame (72) is rotatably connected to the frame (71), a gear ring (73) is fixedly connected to the outer peripheral wall of the connecting frame (72), a connecting plate (74) is fixedly connected to the side wall of the frame (71), the connecting plate (74) is fixedly connected to the housing of the drive motor (75), the output shaft of the drive motor (75) is fixedly connected to the drive gear (76), and the drive gear (76) is meshed with the gear ring (73).

4. The process for preparing a highly flexible insulating crepe paper tube according to claim 3, characterized in that: The connecting frame (72) is hollowed out to form a heating chamber (721), and an electric heating wire (722) and a temperature sensor (728) are provided in the heating chamber (721). The electric heating wire (722) is used to heat the air in the inner space, and the temperature sensor (728) is used to sense the temperature of the air. A hollow column (724) is fixedly connected at the center of the connecting frame (72), and the center of the hollow column (724) is rotatably connected to the transmission shaft (725). A transmission chamber (726) is formed between the inner side wall of the hollow column (724) and the outer peripheral wall of the transmission shaft (725). A suction pump (723) is bolted to the heating chamber (721), and one end of the suction pump (723) is connected to the transmission chamber (726). The bottom of the hollow column (724) is fixedly connected to the bottom frame (727).

5. The process for preparing a highly flexible insulating crepe paper tube according to claim 4, characterized in that: The bottom frame (727) is hollowed out to form a guide cavity (7271), and the guide cavity (7271) is communicated with the transmission cavity (726). The guide cavity (7271) is connected to the upper end of the adjustment component (7272). The first gear ring (7273), the second gear ring (7274), and the third gear ring (7275) are rotatably connected in the guide cavity (7271). The first gear ring (7273), the second gear ring (7274), and the third gear ring (7275) are connected as a whole through a connecting rod (7276), and one end of the connecting rod (7276) is fixedly connected to the transmission shaft (725).

6. The process for preparing a highly flexible insulating crepe paper tube according to claim 5, characterized in that: The adjustment assembly (7272) comprises a rotating cylinder (72721), the upper end of the rotating cylinder (72721) being rotatably connected to the bottom of the bottom frame (727), and the upper end of the rotating cylinder (72721) being located in the guide cavity (7271) within the bottom frame (727), and the upper end of the rotating cylinder (72721) being fixedly connected to a matching gear (72722).

7. The highly flexible insulating crepe paper tube and preparation process according to claim 6, characterized in that: Multiple sets of matching gears (72722) are respectively engaged with the first gear ring (7273), the second gear ring (7274), and the third gear ring (7275). The side wall of the rotating cylinder (72721) is bolted with a contact rod (72723). The bottom of the guide cavity (7271) is fixedly connected to the upper side wall of the inner cylinder (72724) via a 7-shaped connecting rod.

8. The process for preparing a highly flexible insulating crepe paper tube according to claim 7, characterized in that: An elastic membrane (72725) is fixedly connected to the outer peripheral wall of the inner cylinder (72724), and a gap is provided between the elastic membrane (72725) and the outer peripheral wall of the inner cylinder (72724).

9. The process for preparing a highly flexible insulating crepe paper tube according to claim 8, characterized in that: The outer peripheral wall of the inner cylinder (72724) is provided with a plurality of through holes, so that the inner space of the inner cylinder (72724) is connected to the gap between the elastic membrane (72725) and the inner cylinder (72724); the outer peripheral wall of the upper end of the inner cylinder (72724) located in the guide cavity (7271) is provided with a plurality of through holes, and the plurality of through holes connect the inner space of the inner cylinder (72724) with the guide cavity (7271).

10. A highly flexible insulating corrugated paper tube, characterized by: The insulating crepe paper tube is prepared by the preparation process of the highly flexible insulating crepe paper tube according to claims 1 to 9.

Images