Non-excavation pipeline photocuring hose pre-impregnation device, pre-impregnation process and lining hose adopting pre-impregnation process

Abstract

The invention discloses a trenchless pipeline photocuring hose preimpregnation device, a preimpregnation process and a lining hose adopting the preimpregnation process, belongs to the field of photocuring hose production, is used for preimpregnation, and comprises a box body with a box body inlet, a box body outlet and a shading plate, and a frame body is provided with an inlet frame body guide roller and an outlet frame body guide roller. An inlet upper bearing roller is arranged between the inlet frame body guide roller and the box body inlet, an inlet lower bearing roller corresponding to the inlet upper bearing roller is arranged below the inlet frame body guide roller, and an outlet upper bearing roller is arranged at the position between the outlet frame body guide roller and the box body outlet. An outlet lower bearing roller is arranged at the position, corresponding to the outlet upper bearing roller, below the outlet frame body guide roller. According to the technical scheme, preimpregnation of the lining pipe in the photocuring hose can be achieved, and contact uniformity and reliability in the preimpregnation process are guaranteed.

Description

Technical Field

[0001] This application belongs to the field of light-curing hose production, and more specifically, it relates to a trenchless pipeline light-curing hose prepreg device, a prepreg process, and an inner lining hose using the above-mentioned prepreg process. Background Technology

[0002] UV-curing hoses are used in pipe relining processes. They are typically made of specialized fiberglass braids and impregnated with unsaturated polyester or vinyl ester resin systems containing photoinitiators. During the pipe repair process, ultraviolet light emitted by a special lamp can be used to induce the resin inside to cure, thereby fixing it inside the pipe and repairing it, thus extending the pipe's service life.

[0003] Refer to Chinese Patent Publication No. CN115890969A, which discloses a light-curing hose pre-impregnation process and its pre-impregnation device, and specifically discloses the following technical contents: S1: Fiberglass is woven into a braid, and then shaped into a round shape by a blanking machine to form a perfectly round fiberglass inner tube; S2: A light-transmitting inner film is wrapped on the inner wall of the fiberglass inner tube, an outer film is wrapped on the outer wall of the fiberglass inner tube, and an ultraviolet-shielding film is wrapped on the outer wall of the outer film to form a hose blank; S3: Resin, curing agent and defoamer are added to a mixing device, and after they are fully mixed, a light-curing pre-impregnation liquid is formed, and it is added to the pre-impregnation device; S4: The hose blank is introduced through the light-curing hose pre-impregnation device, and then the hose blank is flattened and pre-impregnated by a stretching component. After the hose blank is thoroughly impregnated in the pre-impregnation device, it is irradiated with a UV lamp for 3-5 seconds to thicken the light-curing pre-impregnation liquid, and then it is wound into a temperature-controlled transport box for storage and transportation.

[0004] In step S3 above, a pre-impregnation device is required to pre-impregnate the hose blank. However, the applicant believes that there is still room for improvement in the pre-impregnation device in the prior art, so as to improve the effect and quality of pre-impregnation and ensure the stability and reliability of the contact between the adhesive and the inner lining hose. Summary of the Invention

[0005] The purpose of this application is to provide a trenchless pipeline UV-curable hose prepreg device, a prepreg process, and an inner liner hose using the above prepreg process, which can realize the prepreg of the inner liner in the UV-curable hose and ensure the uniformity and reliability of contact during the prepreg process.

[0006] To achieve the above objectives, this application employs the following technical solution: The trenchless pipe light-curing hose prepreg device described in this application includes a housing. The housing has a housing inlet and a housing outlet in the feeding and discharging directions, respectively. A light-shielding plate is provided at the top of the housing in the direction of the housing outlet. A lifting driver is provided on the light-shielding plate, and the lifting driver is connected to a frame. An inlet frame guide roller and an outlet frame guide roller are respectively provided at both ends of the frame. An inlet upper support roller is provided between the inlet frame guide roller and the housing inlet. An inlet lower support roller, corresponding to the inlet upper support roller, is provided below the inlet frame guide roller. An outlet upper support roller is provided at the position between the outlet frame guide roller and the housing outlet. The outlet support roller is located below the outlet frame guide roller and at a position corresponding to the outlet upper support roller. The inner lining hose enters above the inlet upper support roller through the box inlet, is guided to the inlet lower support roller by the inlet frame guide roller, is fed to the outlet lower support roller by the inlet lower support roller, is guided to the outlet frame guide roller by the outlet lower support roller, is guided to above the outlet upper support roller by the outlet frame guide roller, and is fed to the outlet scraper at the box outlet by the outlet upper support roller. The outlet scraper is located at the box outlet position. The box has a box inlet pipe and an outlet pipe near the bottom on both sides, and the box inlet pipe and outlet pipe are located on the same horizontal plane.

[0007] As one of the preferred technical solutions of this application, the frame includes an upper frame and a lower frame. The upper frame and the lower frame are arranged in parallel and connected by frame fixing rods at the corner positions. An inlet frame guide roller and an outlet frame guide roller are respectively provided at both ends of the upper frame and the lower frame. The inlet frame guide roller and the outlet frame guide roller on the upper frame are respectively provided with corresponding inlet frame guide roller and outlet frame guide roller on the lower frame.

[0008] As one of the preferred technical solutions of this application, a driver fixing plate is also provided between the upper frame and the lower frame. A support roller driver is fixedly installed on the driver fixing plate. The support roller driver has two telescopic ends, which are respectively connected to the support drive connecting plate. The two ends of the support drive connecting plate are respectively provided with strip-shaped through holes. A support adjusting rod is slidably connected in the strip-shaped through holes. The support adjusting rod is located at the bottom end of the support roller adjusting plate. The middle position of the support roller adjusting plate is respectively hinged to the corresponding ends of the upper frame and the lower frame. The inlet upper support roller is located at the top of the support roller adjusting plate.

[0009] As one of the preferred technical solutions of this application, the top two ends of the upper frame are provided with hinge seats, and the hinge seats of the upper frame are respectively hinged to the bottom end of the tensioning plate. The top end of the tensioning plate is rotatably connected to the end of the tensioning roller. The tensioning roller is located between the inlet upper support roller and the inlet frame guide roller, and between the outlet frame guide roller and the outlet upper support roller.

[0010] As one of the preferred technical solutions of this application, a strip-shaped through hole is machined at the middle position of the tensioning rotating plate, and tensioning adjusting rods are slidably connected between the tensioning rotating plates on both sides of the upper frame through the strip-shaped through hole. The tensioning adjusting rods are connected to the hinge seats at both ends of the tensioning driver, and the tensioning driver is connected to the upper frame through a fixed plate. The top end of the fixed plate is connected to the telescopic end of the lifting driver.

[0011] As one of the preferred technical solutions of this application, the outlet scraper includes an upper scraper located above the inner lining hose and a lower scraper located below the inner lining hose. Both the upper scraper and the lower scraper are provided with leakage notches at the connection positions with the housing. The upper scraper and the lower scraper are curved at the contact positions with the inner lining hose.

[0012] As one of the preferred technical solutions of this application, the box inlet is provided with an inlet bottom roller and an inlet top roller. The inlet bottom roller is located below the inner lining hose, and the inlet top roller is located in the vertical strip-shaped through hole of the box inlet. The two ends of the inlet top roller are respectively connected to the inlet roller body adjuster, and the inlet roller body adjuster is fixed on the box at the box inlet position.

[0013] A prepreg process using the aforementioned trenchless pipe light-curing hose prepreg device includes the following steps: the inner lining hose is guided into the inlet upper support roller position by the inlet bottom roller and inlet top roller at the inlet position of the box, tensioned by the tension roller, and then guided into the inlet lower support roller position by the inlet frame guide roller, passing under the inlet lower support roller and entering under the outlet lower support roller. The inlet lower support roller and the outlet lower support roller are located at the immersion position in the box; the inner lining hose is fed into the inner side of the outlet frame guide roller above the outlet lower support roller, and after contacting the tension roller, it is fed into the upper support roller above the outlet, and then discharged through the outlet scraper plate; the immersion liquid level in the box is maintained by the box inlet pipe and outlet pipe.

[0014] A lined hose that uses the aforementioned pre-impregnation process.

[0015] Compared with the prior art, the beneficial effects of this application are: This application can realize the lifting and lowering movement of the entire frame and rollers inside the box through the lifting drive, and realize the adjustment of the soaking height through the lifting and lowering movement. The inner lining hose is guided and the tension is adjusted through the structure of upper support roller at the inlet, guide roller of the inlet frame, lower support roller at the inlet, upper support roller at the outlet, and guide roller of the outlet frame, so as to realize full contact between the inner lining hose and the liquid, thereby ensuring the stability and reliability of pre-impregnation, and can be flexibly adjusted according to the different inner lining hoses. Attached Figure Description

[0016] Figure 1 This is the three-dimensional representation of the present application. Figure 1 .

[0017] Figure 2 This is the three-dimensional representation of the present application. Figure 2 .

[0018] Figure 3 yes Figure 1 A 3D image after the sunshade has been removed.

[0019] Figure 4 This is a top view of this application.

[0020] Figure 5 yes Figure 4 A cross-sectional view at the position and direction shown in AA.

[0021] In the diagram: 1. Box body; 2. Light shield; 3. Box inlet; 4. Inlet bottom roller; 5. Inlet top roller; 6. Inner lining hose; 7. Inlet roller adjuster; 8. Lifting driver; 9. Box inlet pipe; 10. Outlet scraper; 11. Box outlet; 12. Tensioning roller; 13. Tensioning rotating plate; 14. Tensioning adjusting rod; 15. Tensioning driver; 16. Inlet upper support roller; 17. Support roller adjusting plate; 18. Inlet frame guide roller; 19. Support adjusting rod; 20. Support drive connecting plate; 21. Support roller driver; 22. Inlet lower support roller; 23. Upper frame; 24. Lower frame; 25. Frame fixing rod; 26. Driver fixing plate; 27. Outlet lower support roller; 28. Outlet frame guide roller; 29. ​​Outlet upper support roller; 30. Lower scraper; 31. Upper scraper; 32. Outlet pipe. Detailed Implementation

[0022] The technical solutions described in this application will be further described below with reference to the accompanying drawings and embodiments.

[0023] Example 1: A trenchless pipe light-curing hose prepreg device includes a box 1 with a rectangular structure. The box 1 is provided with a box inlet 3 and an outlet scraper 10 in the feeding and discharging directions, respectively. An inlet bottom roller 4 and an inlet top roller 5 are provided at the box inlet 3. The position of the inlet bottom roller 4 relative to the box inlet 3 is fixed. The two ends of the inlet top roller 5 are rotatably set in a strip hole through a shaft and are connected to the telescopic end of the inlet roller adjuster 7 at the position of the strip hole. The inlet roller adjuster 7 is fixed on the box 1 at the position of the box inlet 3.

[0024] A gap is formed between the inlet bottom roller 4 and the inlet top roller 5 to allow the inner lining hose 6 to pass through. After passing through the inlet bottom roller 4 and the inlet top roller 5, the inner lining hose 6 is fed above the inlet upper support roller 16. The inlet upper support roller 16 is located at the top of the support roller adjusting plate 17. The middle position of the support roller adjusting plate 17 is hinged to the end of the upper frame 23. The bottom end of the support roller adjusting plate 17 is connected to the support adjusting rod 19. The support adjusting rod 19 is slidably disposed in the strip-shaped through holes at both ends of the support drive connecting plate 20. The support drive plate 20 is located at the telescopic end of the support roller driver 21; an inlet lower support roller 22 is provided at a corresponding position below the inlet upper support roller 16, and the inlet lower support roller 22 is also connected to the lower frame 24 and the support drive plate 20 through the corresponding support roller adjusting plate 17; the support roller driver 21 is connected to the upper frame 23 and the lower frame 24 above through the driver fixing plate 26, and the upper frame 23 and the lower frame 24 are arranged in parallel and are fixedly connected as a whole by the frame fixing rod 25 at the corner position.

[0025] The upper frame 23 and the lower frame 24 are respectively provided with an inlet frame guide roller 18 and an outlet frame guide roller 28 at their ends. A tension roller 12 is provided between the inlet upper support roller 16 and the inlet frame guide roller 18. The top ends of the tension roller 12 are rotatably connected to the tension plate 13. The bottom end of the tension plate 13 is hinged to the hinge seat of the upper frame 23. The tension plate 13 has a strip hole at the middle position and a tension adjusting rod 14 is slidably connected through the strip hole. The tension adjusting rod 14 is hinged to both ends of the tension driver 15. The tension driver 15 is connected to the upper frame 23 through a fixing plate. The top of the fixed plate of the tensioning driver 15 is also fixedly connected to the telescopic end of the lifting driver 8. The bottom end of the lifting driver 8 is fixed to the light shield 2. The light shield 2 is located near the box outlet 11. The box outlet 11 is also provided with an outlet scraper 10. The outlet scraper 10 includes a lower scraper 30 and an upper scraper 31. The lower scraper 30 and the upper scraper 31 contact the top and bottom surfaces of the inner lining hose 6 through the arc bend and achieve the scraping of adhesive.

[0026] The box 1 has a box inlet pipe 9 and a box outlet pipe 32 at its two ends, which are provided with a box inlet 3 and a box outlet 11, respectively. The box inlet pipe 9 and the box outlet pipe 32 are located on the same horizontal plane.

[0027] Example 2: A prepreg process using a trenchless pipe light-curing hose prepreg device described in Example 1. This process includes the following steps: the inner lining hose 6 is guided by the inlet bottom roller 4 and inlet top roller 5 at the inlet inlet 3 to the inlet upper support roller 16. After being tensioned by the tension roller 12, it is guided by the inlet frame guide roller 18 to the inlet lower support roller 22, and then passes under the inlet lower support roller 22 to the outlet lower support roller 27. Below, the inlet lower support roller 22 and the outlet lower support roller 27 are located at the immersion position in the box 1; the inner lining hose 6 is fed into the inner side of the outlet frame guide roller 28 above the outlet lower support roller 27, and after the inner lining hose 6 contacts the tension roller 12 inside the outlet frame guide roller 28, it is fed into the upper support roller 29 above the outlet, and is sent out through the outlet scraper 10 after passing through the upper support roller 29; the immersion height in the box 1 is maintained by the box inlet pipe 9 and the outlet pipe 32.

[0028] Example 3: A lined hose produced using the pre-impregnation process described in Example 2.

[0029] Based on the above embodiments, the following paragraphs will continue to describe in detail the technical features involved and the functions and roles of these technical features in this technical solution, so as to help those skilled in the art to fully understand the technical solution and reproduce it.

[0030] In this application, the housing 1 is a rectangular structure with an open top. A housing inlet 3 and a housing outlet 11 are respectively provided on both sides of the top opening. An inlet bottom roller 4 and an inlet top roller 5 are provided at the housing inlet 3 for extension. The inlet top roller 5 can adjust the extension pressure under the action of the inlet roller adjuster 7. An outlet scraper 10 is provided at the housing outlet 11. The outlet scraper 10 includes a lower scraper 30 located below the inner lining hose 6 and an upper scraper 31 located above the inner lining hose 6. Both the lower scraper 30 and the upper scraper 31 have leakage notches at their connection points with the housing 1 to allow the scraped adhesive to flow out from below. Both the lower scraper 30 and the upper scraper 31 have arc-shaped bends at their contact points with the inner lining hose 6 to scrape off excess adhesive from the inner lining hose 6.

[0031] In this application, a lifting driver 8 is fixedly connected to the light-shielding plate 2. The telescopic end of the lifting driver 8 is connected to the frame structure composed of the upper frame 23 and the lower frame 24 through a fixed plate, so as to realize the overall movement of the frame structure composed of the upper frame 23 and the lower frame 24. The overall movement of the frame structure will drive the various rollers installed on it to move together. The movement of the rollers can make the inner lining hose 6 move to the bottom adhesive position through these rollers, so as to realize the pre-impregnation of the inner lining hose, avoid uneven distribution of adhesive due to the influence of the internal pre-impregnation adhesive, and improve the stability of pre-impregnation.

[0032] In this application, one end of the upper frame 23 is connected to an upper inlet support roller 16 via a support roller adjusting plate 17, and one end of the lower frame 24 is connected to an lower inlet support roller 22 via a support roller adjusting plate 17. The upper inlet support roller 16 and the lower inlet support roller 22 are correspondingly arranged. One end of the upper frame 23 is hinged to the middle position of the support roller adjusting plate 17, and one end of the lower frame 24 is hinged to the middle position of the support roller adjusting plate 17. The support roller adjusting plates 17 are located at both ends of the upper inlet support roller 16 and the lower inlet support roller 22, and the two corresponding support roller adjusting plates 17 are connected as one unit via support adjusting rods 19. The support adjusting rods 19 are slidably connected to the strip-shaped through holes at both ends of the support driving connecting plate 20. The support driving connecting plate 20 is hinged to one of the two telescopic ends of the support roller driver 21, and the support adjusting rods 19 are linked under the drive of the telescopic end of the support roller driver 21.

[0033] In this application, the support roller driver 21 is fixedly connected to the driver fixing plate 26. The driver fixing plate 26 is connected to the upper frame 23 and the lower frame 24 at their respective ends. The upper frame 23 and the lower frame 24 are fixedly connected by frame fixing rods 25 at the corner positions. The ends of the upper frame 23 and the lower frame 24 are respectively provided with inlet frame guide rollers 18 and outlet frame guide rollers 28. There are two inlet frame guide rollers 18 distributed vertically, and there are two outlet frame guide rollers 28 distributed vertically.

[0034] In this application, a tensioning roller 12 is provided between the inlet support roller 16 and the inlet frame guide roller 18. The tensioning roller 12 is located at the top of the tensioning rotating plate 13, and the bottom end of the tensioning rotating plate 13 is hinged to the hinge seat of the upper frame 23. The tensioning rotating plate 13 has a strip-shaped hole extending along its length at its middle position. The tensioning rotating plate 13 is located at both ends of the tensioning roller 12. Tensioning adjusting rods 14 are respectively provided between adjacent tensioning rotating plates 13 on the tensioning roller 12. The tension adjusting rods 14 are slidably connected to the tensioning rotating plate 13 through the strip-shaped hole. The tension adjusting rods 14 are hinged to both ends of the tensioning actuator 15, and under the drive of the tensioning actuator 15, the tension adjusting rods 14 move along the strip-shaped hole of the tensioning rotating plate 13. The tensioning actuator 15 is connected to the upper frame 23 through a fixed plate. The telescopic end of the lifting actuator 8 is connected to the fixed plate of the upper frame 23.

[0035] In this application, the liquid inlet pipe 9 and liquid outlet pipe 32 of the box body are respectively located at the inlet and outlet ends of the box body 1. The liquid inlet pipe 9 and the upper frame 23 are used to maintain the high dynamic stability of the internal adhesive liquid.

[0036] The lifting drive 8 drives the frame to move up and down dynamically and rhythmically within the housing 1. The tensioning of the inner lining hose 6 and the impregnation of the adhesive are achieved through the inlet upper support roller 16, outlet upper support roller 29, inlet lower support roller 22, and outlet lower support roller 27. The inlet lower support roller 22 and outlet lower support roller 27 allow for adjustment of the adhesive impregnation depth. Furthermore, under the action of the tension roller 12, the tension of the inner lining hose 6 is ensured during adhesive impregnation, thus guaranteeing the extended state of the inner lining hose 6.

[0037] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. 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 trenchless pipeline light-curing hose prepreg device, comprising a housing (1), wherein the housing (1) is provided with a housing inlet (3) and a housing outlet (11) in the feeding and discharging directions, respectively, characterized in that: The box (1) has a light shield (2) at the top in the direction of the box outlet (11). The light shield (2) is equipped with a lifting driver (8), which is connected to a frame. The two ends of the frame are respectively equipped with an inlet frame guide roller (18) and an outlet frame guide roller (28). An inlet upper support roller (16) is provided between the inlet frame guide roller (18) and the box inlet (3). An inlet lower support roller (22) corresponding to the inlet upper support roller (16) is provided below the inlet frame guide roller (18). An outlet upper support roller (29) is provided between the outlet frame guide roller (28) and the box outlet (11). An outlet lower support roller (29) is provided below the outlet frame guide roller (28) at a position corresponding to the outlet upper support roller (29). The roller (27) and the inner lining hose (6) enter the upper support roller (16) above the inlet through the box inlet (3), and are guided to the lower support roller (22) through the inlet frame guide roller (18), and are fed to the lower support roller (27) through the lower support roller (22), and are guided to the guide roller (28) through the lower support roller (27), and are guided to the upper support roller (29) above the outlet through the guide roller (28), and are fed to the outlet scraper (10) at the box outlet (11) through the upper support roller (29). The outlet scraper (10) is located at the box outlet (11). The box (1) is provided with a box inlet pipe (9) and an outlet pipe (32) near the bottom on both sides. The box inlet pipe (9) and the outlet pipe (32) are located on the same horizontal plane.

2. The trenchless pipeline photocurable hose prepreg device according to claim 1, characterized in that: The frame includes an upper frame (23) and a lower frame (24). The upper frame (23) and the lower frame (24) are arranged in parallel and connected by frame fixing rods (25) at the corners. The upper frame (23) and the lower frame (24) are respectively provided with an inlet frame guide roller (18) and an outlet frame guide roller (28). The inlet frame guide roller (18) and the outlet frame guide roller (28) on the upper frame (23) are respectively provided with the inlet frame guide roller (18) and the outlet frame guide roller (28) on the lower frame (24).

3. The trenchless pipeline photocurable hose prepreg device according to claim 2, characterized in that: A driver fixing plate (26) is also provided between the upper frame (23) and the lower frame (24). A support roller driver (21) is fixedly provided on the driver fixing plate (26). The support roller driver (21) has two telescopic ends. The two telescopic ends of the support roller driver (21) are respectively connected to the support drive connecting plate (20). The two ends of the support drive connecting plate (20) are respectively provided with strip-shaped through holes. A support adjustment rod (19) is slidably connected in the strip-shaped through holes. The support adjustment rod (19) is located at the bottom end of the support roller adjustment plate (17). The middle position of the support roller adjustment plate (17) is respectively hinged to the ends of the corresponding upper frame (23) and lower frame (24). The inlet upper support roller (16) is located at the top of the support roller adjustment plate (17).

4. The trenchless pipeline photocurable hose prepreg device according to claim 3, characterized in that: The upper frame (23) has hinge seats at both ends of its top, and the hinge seats of the upper frame (23) are respectively hinged to the bottom end of the tensioning plate (13). The top end of the tensioning plate (13) is rotatably connected to the end of the tensioning roller (12). The tensioning roller (12) is located between the inlet upper support roller (16) and the inlet frame guide roller (18), and between the outlet frame guide roller (28) and the outlet upper support roller (29).

5. The trenchless pipeline photocurable hose prepreg device according to claim 4, characterized in that: A strip-shaped through hole is machined at the middle position of the tensioning plate (13), and tensioning adjustment rods (14) are slidably connected between the tensioning plates (13) on both sides of the upper frame (23) through the strip-shaped through hole. The tensioning adjustment rods (14) are connected to the hinge seats at both ends of the tensioning driver (15). The tensioning driver (15) is connected to the upper frame (23) through the fixing plate. The top of the fixing plate is connected to the telescopic end of the lifting driver (8).

6. The trenchless pipeline light-curing hose prepreg device according to claim 5, characterized in that: The outlet scraper (10) includes an upper scraper (31) above the inner lining hose (6) and a lower scraper (30) below the inner lining hose (6). Both the upper scraper (31) and the lower scraper (30) have leakage gaps at the connection points with the housing (1). The upper scraper (31) and the lower scraper (30) are curved at the contact points with the inner lining hose (6).

7. A trenchless pipeline photocurable hose prepreg device according to claim 6, characterized in that: An inlet bottom roller (4) and an inlet top roller (5) are provided at the box inlet (3). The inlet bottom roller (4) is located below the inner lining hose (6). The inlet top roller (5) is located in the vertical strip-shaped through hole of the box inlet (3). The two ends of the inlet top roller (5) are respectively connected to the inlet roller body adjuster (7). The inlet roller body adjuster (7) is fixed on the box (1) at the box inlet (3).

8. The prepreg process of a trenchless pipeline photocurable hose prepreg device according to claim 7, characterized in that: The process includes the following steps: the inner lining hose (6) is guided by the inlet bottom roller (4) and inlet top roller (5) at the box inlet (3) to the inlet upper support roller (16). After being tensioned by the tension roller (12), it is guided by the inlet frame guide roller (18) to the inlet lower support roller (22), and then passes under the inlet lower support roller (22) to the outlet lower support roller (27). The inlet lower support roller (22) and the outlet lower support roller (27) are positioned... At the immersion position in the box (1); the inner lining hose (6) is fed into the inner side of the outlet frame guide roller (28) above the outlet lower support roller (27), and after the inner lining hose (6) inside the outlet frame guide roller (28) comes into contact with the tension roller (12), it is fed into the upper support roller (29) above the outlet, and is sent out through the outlet scraper (10) after passing through the upper support roller (29); the immersion height in the box (1) is maintained by the box inlet pipe (9) and the outlet pipe (32).

9. A type of inner-lined flexible hose, characterized in that, The prepreg process described in claim 8 was used.

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