Heat preservation cotton coating equipment for flexible composite pipe

Abstract

According to the heat preservation cotton wrapping equipment for the flexible composite pipe, a hole shrinkage mold with the hole diameter of the upper end gradually reduced from left to right is installed on the upper end face of a left support in a height-adjustable mode, and a gun head of a hot air gun obliquely installed on the hole shrinkage mold extends into the hole shrinkage mold from the small-diameter end of the hole shrinkage mold; the thermal insulation cotton sleeved on the flexible composite pipe penetrating through the reducing die is subjected to hot melting and bonding by a hot air gun; a mounting rack is fixed on the right bracket in a height adjustable manner, a winding machine provided with a protective film roll is fixed on the mounting rack in a left-right adjustable manner, and when the winding machine drives the protective film to rotate around the axis of the flexible composite pipe as the center, the protective film is wound on heat preservation cotton on the outer wall of the flexible composite pipe which penetrates through the winding machine and moves rightwards. The problems that according to a traditional winding mode, multi-pipe-diameter adaptability is poor, centering degree adjustment is difficult, mobility is lacked, heat preservation cotton connector bonding is not firm, and the outer protection winding function is single are solved, and the wrapping efficiency and quality of heat preservation cotton on the flexible composite pipe are improved.

Description

Technical Field

[0001] This invention belongs to the field of flexible composite pipe insulation cotton covering technology, specifically relating to a flexible composite pipe insulation cotton covering device. Background Technology

[0002] When flexible composite pipes transport high-temperature, low-temperature, or easily solidifying media, they need to be wrapped with thermal insulation cotton to reduce heat exchange between the medium inside the pipe and the outside environment, reduce energy consumption, ensure stable medium transport temperature, and prevent condensation on the outer wall of the pipe under low-temperature conditions, thus preventing pipe corrosion and aging. This ensures the safe and long-term operation of the system. The core requirements for thermal insulation cotton wrapping of flexible composite pipes are to ensure that the insulation cotton fits tightly to the pipe, the joints are firmly sealed, the outer diameter of the pipe is uniform after wrapping, and it must be adaptable to the processing requirements of pipes of different diameters. Existing insulation cotton wrapping equipment, whether it's factory-installed fixed wrapping equipment that uses manual initial wrapping followed by a winding device for final fixation, or simple on-site construction tools that primarily rely on manual wrapping supplemented by basic mechanical clamping, generally suffers from the following drawbacks during use: 1) Poor compatibility with multiple pipe diameters and low changeover efficiency; most are designed for single pipe diameters or have limited adjustable ranges and low positioning accuracy, making it difficult to quickly adapt to multiple pipe specifications from DN50 to DN200; 2) Difficulty in centering adjustment and inconvenient transportation and installation; fixed supports, single adjustment direction, and integrated design for disassembly. The problems are: 1) Cumbersome installation; 2) Lack of mobility, fixed equipment cannot be used for on-site construction, and simple mobile equipment lacks stability; 3) Poor bonding and sealing of insulation cotton joints: tape bonding or electrofusion sleeve covering is used, but tape bonding is prone to aging and falling off, and electrofusion sleeve requires multiple processes and is prone to forming ridges at the sealing point, which reduces the sealing effect after cutting; manual bonding is inefficient and the bonding quality is unstable; 4) The outer protective wrapping function is limited and has poor coordination with the wrapping process, only adapting to a single type of wrapping material (such as PE film), and is separate from the insulation cotton wrapping process, requiring separate adjustment of positioning, resulting in wrapping deviation and wrinkling of the protective layer. These defects lead to low production and construction efficiency and poor wrapping quality, making it difficult to meet actual needs; therefore, it is necessary to improve these aspects to solve the above problems. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a flexible composite pipe insulation cotton wrapping device. This device involves setting up a height-adjustable winding machine and a diameter-reducing mold with a hot-melt gun on a mobile trolley. With the winding center of the winding machine coaxial with the diameter-reducing mold, the protective film is wound around the insulation cotton on the outer wall of the flexible composite pipe, which passes through the winding machine and moves to the right, as the winding machine drives the protective film to rotate around the axis of the flexible composite pipe. This solves the problems of poor multi-diameter compatibility, difficulty in centering adjustment, lack of mobility, weak bonding of the insulation cotton joints, and limited external protective winding function inherent in traditional winding methods. It improves the wrapping efficiency and quality of insulation cotton on flexible composite pipes, is compatible with various pipe diameters, and facilitates on-site construction.

[0004] The technical solution adopted in this invention is: a flexible composite pipe insulation cotton covering device, including a mobile trolley and left and right supports fixed to the left and right sides of the mobile trolley platform with adjustable front and rear positions. The upper end face of the left support is equipped with a diameter reduction mold with an upper end diameter that gradually decreases from left to right. The nozzle of a hot air gun, which is inclinedly mounted on the diameter reduction mold, extends into the diameter reduction mold from the small diameter end of the mold, and the hot air gun heat-melts and bonds the joint of the insulation cotton covering the flexible composite pipe passing through the diameter reduction mold. The right support is equipped with an adjustable mounting frame, and a winding machine with a protective film roll is fixed to the mounting frame with adjustable left and right positions. Under the premise that the winding center of the winding machine is coaxial with the diameter reduction mold, the protective film is wound around the insulation cotton on the outer wall of the flexible composite pipe that passes through the winding machine and moves to the right when the winding machine drives the protective film to rotate around the axis of the flexible composite pipe.

[0005] The reducing mold includes a mold frame and a combined reducing mold sleeve fixed on the mold frame. Multiple through holes are evenly distributed on the upper two side walls of the left support and the lower two side walls of the mold frame. Bolts passing through the through holes on the lower two side walls of the mold frame and the through holes on the same side wall of the left support adjustably and fix the mold frame to the upper end of the left support. An opening groove is formed on the top wall of the small diameter end of the combined reducing mold sleeve, and the hot air gun head fixed to the top of the combined reducing mold sleeve is set at the joint position of the insulation cotton through the opening groove.

[0006] Furthermore, the combined reducing die sleeve includes a main reducing die sleeve and multiple sequentially fitted reducing die sleeves. Both the main reducing die sleeve and the reducing die sleeves are tapered sleeves, and the multiple sequentially fitted reducing die sleeves are inserted into the inner hole of the small diameter end of the main reducing die sleeve. The main reducing die sleeve and the multiple reducing die sleeves are fixed together as one unit by fixing screws that are adapted to and connected to the threaded holes on the outer walls of the main reducing die sleeve and the multiple reducing die sleeves. The opening groove is provided on the main reducing die sleeve and is located on the left side of the reducing die sleeve. A support column is fixed on the top wall of the main reducing die sleeve, and a clamp fitted on the upper end of the hot air gun is connected to the upper end of the support column.

[0007] Furthermore, the winding machine includes a motor, a mounting bracket, and support arms. A guide rail is fixed to the upper end face of the mounting bracket, and the mounting bracket adapted to the guide rail is threadedly connected to a lead screw rotatably supported in a long groove on the upper end face of the guide rail. The motor is fixed to the mounting bracket, and the left and right positions of the motor are adjusted by rotating the operating handle fixed to the right end of the lead screw. An L-shaped frame with a vertical plate located outside the left side of the mounting bracket is fixed to the mounting bracket, and a tapered sleeve fixed to the outer wall of the vertical plate of the L-shaped frame is fixedly connected to the right end of the inner sleeve by a flange plate and bolts. A small gear is fixed to the output shaft of the motor, and the small gear meshes with a large gear rotatably mounted on the inner sleeve through a bearing. Two outwardly inclined support arms evenly distributed on the left side wall of the large gear are fixed with air expansion shafts, and the protective film roll is tightened and fixed to the air expansion shafts. Under the drive of the motor, the protective film on the protective film roll is wound onto the insulation cotton on the outer wall of the flexible composite pipe.

[0008] Furthermore, multiple through holes are provided on both sides of the upper end of the right bracket and both sides of the lower end of the mounting bracket. Bolts passing through the through holes on the lower side wall of the mounting bracket and the through holes on the same side wall of the right bracket are used to fix the mounting bracket to the upper end of the right bracket in an adjustable manner.

[0009] Furthermore, electric cylinders are fixed on both sides of the middle part of the upper end face of the right bracket, and a top block is fixed on the upper end of the telescopic end of the electric cylinder. With the bolts connecting the right bracket and the mounting frame removed, the mounting frame is lifted to the required height by the telescopic movement of the piston rod of the electric cylinder through the top block.

[0010] Furthermore, the mobile platform has an elongated waist-shaped hole on its surface, and the bolts that connect to the lower end connecting plates of the left and right supports pass through the elongated waist-shaped hole at the corresponding position and are fitted with locking nuts to achieve adjustable fixation of the left and right supports on the mobile platform.

[0011] Advantages of this invention compared to existing technologies: 1. This technical solution uses a mobile flatbed truck as the mobile carrier for the diameter reduction mold and the winding machine, which enables the equipment to have good mobility, meets the needs of on-site construction, and solves the problems of fixed equipment being unable to be used for on-site construction and the lack of stability of simple mobile equipment. The mobile flatbed truck provides a stable support foundation for the entire equipment and facilitates the transfer of the equipment between different construction sites. 2. The diameter reduction mold in this technical solution adopts a combined structure, including a main diameter reduction mold sleeve and multiple sequentially nested diameter reducing mold sleeves. By replacing different specifications of diameter reducing mold sleeves or adjusting the combination of diameter reducing mold sleeves, it can quickly adapt to flexible composite pipes of multiple specifications from DN50 to DN200, greatly improving the changeover efficiency and solving the defect of poor multi-diameter adaptability of existing equipment. In addition, the height of the diameter reduction mold is adjustable, the front and rear positions of the left and right supports are adjustable, and the left and right positions of the winding machine are adjustable, which facilitates precise adjustment of the relative positions of various parts of the equipment, ensures the centering of the insulation cotton covering, and ensures that the outer diameter of the pipe is uniform after covering. 3. This technical solution uses a hot air gun to heat-melt bond the joint of the insulation cotton. Under this premise, a protective film is wrapped around the insulation cotton to improve the wrapping quality and sealing effect. Compared with the traditional tape pasting and electrofusion sleeve wrapping method, the sealing performance is better and it is not easy to age and fall off, thus solving the problems of poor bonding and sealing of the insulation cotton joint. 4. The wrapping machine of this technical solution uses an air expansion shaft to fix the protective film roll, which can adapt to different sizes and types of protective films. Furthermore, the wrapping machine works in conjunction with the diameter reduction mold, eliminating the need for separate positioning adjustments. This avoids wrapping deviation and wrinkling of the protective layer, improving the quality and efficiency of external protective wrapping. It also solves the problem that the existing equipment has a single external protective wrapping function and poor coordination with the wrapping process. 5. The right support of this technical solution is equipped with an electric cylinder and a top block. After removing the bolts connecting the right support to the mounting frame, the mounting frame can be lifted to the required height by the extension and retraction of the piston rod of the electric cylinder through the top block, which makes it convenient and quick to adjust the height of the mounting frame and further improves the convenience and flexibility of equipment adjustment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the left support and the diameter reduction mold of the present invention; Figure 3 This is a schematic diagram of the combined diameter reduction mold sleeve and hot air gun structure of the present invention; Figure 4 This is a schematic diagram of the connection structure of the upper components of the mounting bracket of the present invention; Figure 5 This is a schematic diagram of the connection structure between the large gear, the support arm, and the L-shaped frame of the present invention. Detailed Implementation

[0013] The following will be based on embodiments of the present invention. Figure 1-5The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0014] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a 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 limitation, 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 said element.

[0016] Equipment for wrapping insulation cotton for flexible composite pipes, such as Figure 1As shown, the system includes a mobile trolley 1 and left and right supports 2 and 3, which are fixed to the left and right sides of the platform surface of the mobile trolley 1 and are adjustable in front and back positions. Specifically, the mobile trolley 1 has oblong holes on its surface, and bolts connecting to the lower end connecting plates of the left and right supports 2 and 3 pass through the oblong holes and are fitted with locking nuts, thus allowing the left and right supports 2 and 3 to be fixed in an adjustable position on the mobile trolley 1. The upper end of the left support 2 is equipped with a diameter-reducing mold 4, whose upper diameter gradually decreases from left to right, and a hot air gun 5 is mounted at an angle on the diameter-reducing mold 4. The small diameter end of the reducing mold 4 is inserted into the reducing mold 4, and the joint of the insulation cotton 7 on the flexible composite tube 6 passing through the reducing mold 4 is heat-fused and bonded by the hot air gun 5; the right bracket 3 is height-adjustable and fixed with the mounting bracket 8, and the winding machine 9 with the protective film roll 11 is adjustable and fixed on the mounting bracket 8. Under the premise that the winding center of the winding machine 9 is coaxial with the reducing mold 4, when the winding machine 9 drives the protective film roll 11 to rotate around the axis of the flexible composite tube 6, the protective film is wrapped around the insulation cotton 7 on the outer wall of the flexible composite tube 6 that passes through the winding machine 9 and moves to the right. In the above structure, by setting a height-adjustable winding machine 9 and a diameter-reducing mold 4 with a hot melt gun 5 on the mobile cart 1, and with the winding center of the winding machine 9 coaxial with the diameter-reducing mold 4, the protective film roll 11 is wound around the insulation cotton 7 on the outer wall of the flexible composite pipe 6, which passes through the winding machine 9 and moves to the right, when the winding machine 9 drives the protective film roll 11 to rotate around the axis of the flexible composite pipe 6. This solves the problems of poor multi-diameter compatibility, difficulty in centering adjustment, lack of mobility, poor bonding of the insulation cotton 7 interface, and single external protective winding function of the traditional winding method. It improves the wrapping efficiency and quality of the insulation cotton 7 on the flexible composite pipe 6, adapts to the use of multiple pipe diameters, and facilitates on-site construction. The mobile cart 1 is used as the moving carrier for the diameter-reducing mold 4 and the winding machine 9. The equipment is braked by locking the universal wheels at the bottom of the mobile cart 1. If fixed use is required, it can be fixed to the ground through the fixing holes set on the mobile cart 1 and expansion bolts that fit into the fixing holes, so as to realize the adjustment of the moving and fixed installation modes. The equipment possesses excellent mobility and reliable stability, meeting on-site construction needs and solving the problems of fixed equipment being unable to be used on-site and the lack of stability of simple mobile equipment. The mobile cart provides a stable support foundation for the entire equipment and facilitates its transfer between different construction sites. A hot air gun 5 is used to heat-melt bond the joints of the insulation cotton 7. Under this premise, a protective film is wrapped around the insulation cotton 7 to improve the quality and sealing of the insulation cotton covering. Compared with traditional tape pasting and electrofusion sleeve covering methods, the sealing performance is better and it is less prone to aging and falling off, solving the problems of weak bonding and poor sealing of the insulation cotton 7 joints. The specific structure of the diameter reduction mold 4 is as follows: The diameter reduction mold 4 includes a mold frame 4-1 and a combined diameter reduction mold sleeve 4-2 fixed on the mold frame 4-1. Multiple through holes are evenly distributed on both sides of the upper end of the left support 2 and on both sides of the lower end of the mold frame 4-1. Bolts passing through the through holes on both sides of the lower end of the mold frame 4-1 and the through holes on the same side of the left support 2 fix the mold frame 4-1 to the upper end of the left support 2 in adjustable height. An opening groove 4-3 is made on the top wall of the small diameter end of the combined diameter reduction mold sleeve 4-2. The nozzle of the hot air gun 5 fixed on the top of the combined diameter reduction mold sleeve 4-2 passes through the opening groove 4-3 and faces the joint position of the insulation cotton 7.

[0017] like Figure 3 As shown, the specific structure of the combined reducing die sleeve 4-2 is as follows: The combined reducing die sleeve 4-2 includes a main reducing die sleeve 4-21 and multiple sequentially fitted reducing die sleeves 4-22. Both the main reducing die sleeve 4-21 and the reducing die sleeves 4-22 are tapered sleeves, and the multiple sequentially fitted reducing die sleeves 4-22 are inserted into the inner hole of the small diameter end of the main reducing die sleeve 4-21, and are connected to the main reducing die sleeve 4-21 and the multiple reducing die sleeves. The threaded hole 4-25 on the outer wall of 4-22 is adapted to connect the fixing screw 4-23 to the main reducing die sleeve 4-21 and multiple reducing die sleeves 4-22 into one piece. The opening slot 4-3 is provided on the main reducing die sleeve 4-21 and located on the left side of the reducing die sleeve 4-22. A support column 4-24 is fixed on the top wall of the main reducing die sleeve 4-21, and the clamp 10 fitted on the upper end of the hot air gun 5 is connected to the upper end of the support column 4-24.

[0018] In the above structure, the combined reducing die 4-2 adopts a combined structure, including a main reducing die 4-21 and multiple sequentially nested reducing die 4-22. By replacing different specifications of reducing die 4-22 or adjusting the combination of reducing die 4-22, it can quickly adapt to multiple specifications of flexible composite pipe 6 from DN50 to DN200, greatly improving the changing efficiency and solving the defect of poor multi-diameter adaptability of existing equipment. In addition, the height of the reducing die 4 is adjustable, the front and rear positions of the left support 2 and the right support 3 are adjustable, and the left and right positions of the winding machine 9 are adjustable, which facilitates precise adjustment of the relative positions of each component of the equipment, ensures the centering of the insulation cotton covering, and ensures that the outer diameter of the pipe is uniform after covering. like Figure 1 , 4As shown in Figure 5, the specific structure of the winding machine 9 is as follows: The winding machine 9 includes a motor 9-1, a mounting bracket 9-2, and a support arm 9-3. A guide rail 9-4 is fixed on the upper end face of the mounting bracket 8, and the mounting bracket 9-2 adapted to the guide rail 9-4 is threadedly connected to a lead screw 9-5 rotatably supported in the long groove on the upper end face of the guide rail 9-4. The motor 9-1 is fixed on the mounting bracket 9-2, and the left and right positions of the motor 9-1 are adjusted by rotating the operating handle 9-6 fixed to the right end of the lead screw 9-5. An L-shaped frame 9-8 with a vertical plate located outside the left side of the mounting bracket 8 is fixed on the mounting bracket 9-2, and a tapered sleeve 9-9 fixed on the outer wall of the vertical plate of the L-shaped frame 9-8 is fixedly connected to the right end of the inner sleeve 9-10 by a flange plate and bolts. A small gear 9-7 is fixed on the output shaft of the motor 9-1, and the small gear 9-7 is rotatably mounted on the inner sleeve 9-10 through a bearing 9-11. -12 meshing, the two outwardly inclined support arms 9-3 evenly distributed on the left side wall of the large gear 9-12 are fixed with air expansion shafts 9-13 at their ends, and the protective film roll 11 is tightened and fixed on the air expansion shaft 9-13. Under the drive of the motor 9-1, the protective film on the protective film roll 11 is wound onto the insulation cotton 7 on the outer wall of the flexible composite pipe 6. In the above structure, the winding machine 9 fixes the protective film roll 11 through the air expansion shaft 9-13, which can adapt to different sizes and types of protective films. The winding machine 9 works in coordination with the diameter reduction mold 4, without the need for separate positioning adjustment, avoiding the phenomenon of winding deviation and wrinkling of the protective layer, improving the quality and efficiency of external protective winding, and solving the problem that the existing equipment has a single external protective winding function and poor coordination with the wrapping process. The mounting bracket 9-2 is fixedly connected to the L-shaped frame 9-8, which can realize the synchronous movement of the winding machine 9 and the motor 9-1, ensuring the synchronous meshing of the large gear 9-12 and the small gear 9-7.

[0019] The adjustable connection structure between the mounting bracket 8 and the right bracket 3 is as follows: Multiple vertically distributed through holes are provided on both sides of the upper end of the right bracket 3 and on both sides of the lower end of the mounting bracket 8. Bolts passing through the through holes on the lower side wall of the mounting bracket 8 and the through holes on the same side wall of the right bracket 3 adjust the height of the mounting bracket 8 to the upper end of the right bracket 3. Specifically, electric cylinders 12 are fixed on both sides of the middle of the upper surface of the right bracket 3, and a top block 13 is fixed to the upper end of the telescopic end of the electric cylinder 12. The bolts connecting the right bracket 3 and the mounting bracket 8 are removed. In this state, the mounting frame 8 is lifted to the required height via the extension and retraction of the piston rod of the electric cylinder 12 and the top block 13. The electric cylinder 12 can also be replaced by an equivalent structure of a pneumatic cylinder, a hydraulic cylinder, or a worm gear screw drive. In the above structure, the electric cylinder 12 and the top block 13 are provided on the right bracket 3. After removing the bolts connecting the right bracket 3 and the mounting frame 8, the mounting frame 8 can be lifted to the required height via the extension and retraction of the piston rod of the electric cylinder 12 and the top block 13, which makes it convenient and quick to adjust the height of the mounting frame 8, further improving the convenience and flexibility of equipment adjustment.

[0020] Equipment debugging stage: ① Select the corresponding diameter reduction mold 4 according to the outer diameter of the flexible composite pipe 6 to be wrapped; ② Install the protective film roll 11 of PE film or aluminum foil on the air expansion shaft 9-13; ③ Push the mobile trolley 1 to the construction / production position, lock the universal wheel brake, and if fixed use is required, fix it to the ground through the expansion bolts that match the fixing holes on the frame of the mobile trolley 1; ④ Ensure that the diameter reduction mold 4 is coaxial with the flexible composite pipe 6 to be wrapped; at the same time, adjust the height of the winding machine 9 to be coaxial with the flexible composite pipe 6; ⑤ Start the hot air gun 5 to preheat, and adjust it to the heat melt temperature suitable for the insulation cotton 7 material (such as 120-160℃ for rubber and plastic insulation cotton).

[0021] Wrapping Operation Stage: ① Wrap the appropriately sized insulation cotton 7 around the end of the flexible composite pipe 6 to be wrapped, and feed the end of the flexible composite pipe 6 together with the insulation cotton 7 into the combined reducing mold sleeve 4-2; ② Activate the external traction device (used in conjunction with this equipment, the external traction device is connected to the right end of the flexible composite pipe 6), and pull the combined reducing mold sleeve 4-2 forward at a constant speed. Under the guiding and reducing action of the combined reducing mold sleeve 4-2, the insulation cotton 7 is tightly attached to the outer wall of the flexible composite pipe 6, and at the same time, the joint of the insulation cotton 7 is guided to the area below the nozzle of the hot air gun 5; ③ The hot air gun 5 continuously sprays hot air onto the joint of the insulation cotton 7. Heat is sprayed to melt and bond the insulation cotton 7 at the joint, achieving a firm seal at the joint; ④ The motor 9-1 of the winding machine 9 is started simultaneously. The motor 9-1 drives the support arm 9-3 to rotate the protective film roll 11 through the meshing of the small gear 9-7 and the large gear 9-12, so that the PE film or aluminum foil is evenly wrapped around the outside of the bonded insulation cotton 7 to form an outer protective layer; ⑤ The flexible composite pipe 6 continues to move forward to complete the wrapping of the insulation cotton 7, the bonding of the joint position and the wrapping of the outer protective layer of the entire pipe section until the operation is completed. Then, all equipment is turned off, the casters of the mobile trolley 1 are unlocked, and the equipment is moved to the next working position.

[0022] This technical solution is adopted: 1) Rapid adaptation to multiple pipe diameters and improved changeover efficiency: This solution uses a reduction mold 4, which includes a mold frame 4-1 and a combined reduction mold sleeve 4-2. The reduction mold 4 installed on the left bracket 2 allows for easy adjustment of the hole diameter and is detachable and replaceable, adapting to various pipe outer diameter specifications (such as DN50-DN200). This solves the defects of poor multi-pipe diameter adaptability and cumbersome changeover in existing equipment. The high positioning accuracy of the threaded connection ensures that the insulation cotton 7 fits tightly with the flexible pipe after reduction, avoiding displacement.

[0023] 2) The centering is precisely adjustable and the transportation and installation are convenient: The diameter reduction mold 4 and the winding machine 9 can be adjusted up and down, forward and backward, and left and right, which can precisely adjust the coaxiality of the equipment and the flexible composite pipe 6 to ensure uniform wrapping and winding; each bracket and the mobile trolley 1, the diameter reduction mold 4 and the winding machine 9 are connected by detachable bolts. After disassembly, the volume is reduced, which is convenient for transportation and on-site installation, solving the defects of existing equipment that are difficult to adjust the centering and inconvenient to disassemble and transport.

[0024] 3) Mobile and fixed integration, with a wide range of applicable scenarios: The bottom of the mobile flatbed truck 1 is equipped with universal wheels with brakes, which can be easily moved to the construction site for operation, and can also be fixed to the ground for use by braking or expansion bolts. It takes into account the mobility of on-site construction and the stability of mass production, and solves the defects of existing equipment in terms of lack of mobility and limited applicable scenarios.

[0025] 4) Strong heat fusion bonding at the interface, excellent sealing effect: The specially designed hot air gun 5 installation structure allows the hot air gun 5 to be accurately aimed at the joint area of ​​the insulation cotton 7, and the joint is bonded by heat fusion, without the risk of aging and falling off, and without the need for additional processes, which solves the defects of existing technology such as weak joint (interface) bonding, poor sealing effect and low efficiency; the temperature of the hot air gun 5 is adjustable to adapt to different materials of insulation cotton 7.

[0026] 5) Multi-material wrapping adaptability and good synergy: The wrapping machine 9 can be adapted to various protective materials such as roll PE film and aluminum foil, and the replacement is convenient; the adjustable design structure of the wrapping machine 9 and the diameter reduction mold 4 can achieve coaxial positioning of the two, and with the gear transmission drive, the wrapping uniformity is high and there is no wrinkling or deviation; the wrapping, covering and bonding processes are carried out in synergy, which improves the overall operation efficiency and solves the defects of the existing equipment in single wrapping function and poor synergy.

[0027] 6) Reduced reliance on manual labor and improved work efficiency: Through the diameter reduction guiding function of the diameter reduction mold 4, the insulation cotton 7 does not need to be manually operated to fit with the flexible composite pipe 6; the bonding of the joint position of the insulation cotton 7 and the outer protective wrapping are both automated, and the overall work efficiency is improved by more than 60% compared with manual labor. At the same time, the impact of manual operation on the coating quality is reduced and the product consistency is improved.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flexible composite pipe thermal cotton covering apparatus, characterized by: The utility model provides a kind of flexible composite pipe protection film winding device, including mobile platform car (1) and front and rear position adjustable fixed in the left support (2) and right support (3) of mobile platform car (1) platform face left and right sides, the upper end hole diameter of the left support (2) adjustable installation is gradually reduced from left to right hole diameter of shrinkage die (4), and the gun head of hot air gun (5) obliquely installed on shrinkage die (4) is inserted into shrinkage die (4) by small diameter end of shrinkage die (4), and by hot air gun (5) make flexible composite pipe (6) on the heat insulation cotton (7) of shrinkage die (4) pass through flexible composite pipe (6) and be connected by heat fusion bonding;The right support (3) is fixed with mounting bracket (8) on height adjustable, and winding machine (9) of protective film roll (11) is fixed on mounting bracket (8) on left and right position adjustable, and under the premise that the winding center of winding machine (9) is coaxial with shrinkage die (4), when rotating around the axis of flexible composite pipe (6) by driving protective film roll (11) of winding machine (9), protective film is wound on the heat insulation cotton (7) on the outer wall of flexible composite pipe (6) moving to right and passing through winding machine (9).

2. The flexible composite pipe thermal cotton covering apparatus of claim 1, wherein: The shrinkage die (4) includes die holder (4-1) and combined type shrinkage die sleeve (4-2) fixed on the die holder (4-1), a plurality of upper and lower distribution through holes are uniformly distributed on the upper end two side walls of the left support (2) and the lower end two side walls of the die holder (4-1), and the die holder (4-1) is fixed on the upper end of the left support (2) in height adjustable manner by the bolts passing through the through holes on the lower end two side walls of the die holder (4-1) and the through holes on the same side wall of the left support (2), an open slot (4-3) is formed on the top wall of the small diameter end of the combined type shrinkage die sleeve (4-2), and the gun head of the hot air gun (5) fixed on the top of the combined type shrinkage die sleeve (4-2) is arranged to face the heat insulation cotton (7) jointing position through the open slot (4-3).

3. The flexible composite pipe thermal cotton covering apparatus of claim 2, wherein: The combined type shrinkage die sleeve (4-2) includes a main shrinkage die sleeve (4-21) and a plurality of sequentially sleeved variable diameter die sleeves (4-22), the main shrinkage die sleeve (4-21) and the variable diameter die sleeves (4-22) are all conical sleeves, the plurality of sequentially sleeved variable diameter die sleeves (4-22) are arranged in the small diameter end inner hole of the main shrinkage die sleeve (4-21), and the main shrinkage die sleeve (4-21) and the plurality of variable diameter die sleeves (4-22) are fixedly connected into one by the fixing screws (4-23) matched with the screw holes (4-25) on the outer walls of the main shrinkage die sleeve (4-21) and the plurality of variable diameter die sleeves (4-22), the open slot (4-3) is arranged on the main shrinkage die sleeve (4-21) and located at the left side of the variable diameter die sleeve (4-22), a support column (4-24) is fixed on the top wall of the main shrinkage die sleeve (4-21), and the clamp (10) sleeved on the upper end of the hot air gun (5) is connected to the upper end of the support column (4-24).

4. The flexible composite pipe thermal cotton covering apparatus of claim 1, wherein: The winding machine (9) comprises a motor (9-1), a mounting bracket (9-2) and an arm (9-3), the upper end surface of the mounting frame (8) is fixed with a guide rail (9-4), the mounting bracket (9-2) adapted to the guide rail (9-4) is threadedly connected with a screw rod (9-5) rotatably supported in the long groove at the upper end surface of the guide rail (9-4), the motor (9-1) is fixed on the mounting bracket (9-2) and is adjusted in left and right positions by means of an operating handle (9-6) rotatably fixed on the right end portion of the screw rod (9-5); the mounting bracket (9-2) is fixed with an L-shaped frame (9-8) with a vertical plate located at the left side of the mounting frame (8), a taper sleeve (9-9) fixed on the outer wall of the vertical plate of the L-shaped frame (9-8) is fixedly connected with an inner sleeve (9-10) at the right end through a flange plate and bolts, a pinion (9-7) is fixed on the output shaft of the motor (9-1) and is engaged with a large gear (9-12) rotatably mounted on the inner sleeve (9-10) through a bearing (9-11), the two outwardly inclined arms (9-3) uniformly distributed on the left side wall of the large gear (9-12) are fixed with air expansion shafts (9-13) at the end portions, and a protective film roll (11) is tightly fixed on the air expansion shafts (9-13) and is driven by the motor (9-1) to wind the protective film on the protective film roll (11) on the thermal insulation cotton (7) on the outer wall of the flexible composite pipe (6).

5. The flexible composite pipe thermal cotton covering apparatus of claim 1, wherein: The upper end two side walls of the right bracket (3) and the lower end two side walls of the mounting frame (8) are each provided with a plurality of through holes distributed upward and downward, and the mounting frame (8) is fixed on the right bracket (3) at a height adjustable manner by means of the bolts passing through the through holes in the same side wall of the upper end of the right bracket (3) and the lower end of the mounting frame (8).

6. The flexible composite pipe thermal cotton covering apparatus of claim 5, wherein: The upper end surface of the right bracket (3) is fixed with electric cylinders (12) at both sides of the middle portion, and the upper end portion of the telescopic end of the electric cylinder (12) is fixed with a top block (13), and in the state that the bolts connecting the right bracket (3) and the mounting frame (8) are removed, the mounting frame (8) is jacked to the required height by the telescopic piston rod of the electric cylinder (12) through the top block (13).

7. The flexible composite pipe thermal cotton covering apparatus of claim 1, wherein: The moving plate trolley (1) is provided with a waist-shaped long hole on the plate surface, and the bolts connected with the connecting plates at the lower end portions of the left bracket (2) and the right bracket (3) are connected with the locking nuts through the waist-shaped long holes at the corresponding positions, so as to realize the adjustable fixing of the left bracket (2) and the right bracket (3) in the front and rear positions on the moving plate trolley (1).

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