A soft pipe inversion lining device applied to pipeline lining repair

Abstract

The application relates to the technical field of underground pipeline trenchless repair, and particularly relates to a soft pipe overturning and lining device applied to pipeline lining repair, which comprises a pressure-bearing shell, the front side of the pressure-bearing shell is connected with an overturning output pipe, a flow guide mechanism is arranged in the inside of the overturning output pipe, the flow guide mechanism comprises a circumferential drainage ring and a center self-elastic tapered flow guide shaping cylinder, the circumferential drainage ring is coaxially embedded in the inner wall of the overturning output pipe, the center self-elastic tapered flow guide shaping cylinder is coaxially suspended in the center area of the overturning output pipe, the center self-elastic tapered flow guide shaping cylinder comprises a rear-end fixed large ring, a flexible tapered elastic sleeve and a front-end movable small ring, the rear-end fixed large ring is fixed in the inside of the overturning output pipe, and the flexible tapered elastic sleeve is connected between the rear-end fixed large ring and the front-end movable small ring. The application realizes the beneficial effects of center pre-top shaping and concentrated main pushing in the operation stage, effectively reduces the collapse and inversion risk of the initial overturning of the large-diameter soft pipe, and improves the regularity of overturning and pushing.

Description

Technical Field

[0001] This invention relates to the field of trenchless repair technology for underground pipelines, specifically a flexible hose inversion lining device for pipeline lining repair. Background Technology

[0002] Pipeline lining inversion repair technology, as a mainstream trenchless pipeline repair process, is widely used in the repair of various underground aging pipelines such as municipal drainage, water supply, and gas pipelines. It can form a new lining layer inside the old pipe without excavating the entire road surface, significantly reducing the impact of construction on urban traffic and the environment. The flexible hose inversion lining equipment is the core equipment of this process. It is used to invert and insert a flexible hose impregnated with thermosetting resin into the pipeline to be repaired using air pressure. Its air intake and distribution structure directly determines the forming quality and construction reliability of the hose inversion.

[0003] Existing hose flipping and lining equipment mostly adopts a straight-through air intake structure, where compressed air acts directly axially on the hose end face, relying on overall air pressure to propel the hose forward. However, in the initial flipping stage of large-diameter hoses, insufficient central support can easily lead to problems such as central collapse and inward lip flipping, resulting in inaccurate initial flipping shape. This can easily lead to defects such as circumferential wrinkles and uneven pipe wall adhesion during subsequent advancement, directly affecting the overall strength and service life of the repaired pipeline. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible hose flipping and lining device for pipe lining repair, which aims to improve the problem that the central collapse and lip inversion are prone to occur in the initial flipping stage of large-diameter flexible hoses due to insufficient central support in the prior art.

[0005] The objective of this invention is achieved through the following technical solution: a flexible hose inversion lining device for pipe lining repair, comprising a pressure-bearing shell, wherein an inversion output pipe is connected to the front side of the pressure-bearing shell, and a flow guiding mechanism is provided inside the inversion output pipe; The flow guiding mechanism includes a circumferential flow guiding ring and a central self-expanding conical flow guiding and shaping cylinder. The circumferential flow guiding ring is coaxially embedded in the inner wall of the flip-out output tube, and the central self-expanding conical flow guiding and shaping cylinder is coaxially suspended in the central area of ​​the flip-out output tube. The central self-expanding conical guide and shaping cylinder includes a rear fixed large ring, a flexible conical telescopic sleeve, and a front moving diameter small ring. The rear fixed large ring is fixed inside the flip output tube. The flexible conical telescopic sleeve is connected between the rear fixed large ring and the front moving diameter small ring. Under the action of air pressure in the cavity, it can drive the front moving diameter small ring to complete the axial forward extension synchronously. An inner retraction rod is provided between two adjacent front moving diameter small rings, and a return spring is provided between the inner retraction rods. A driving magnetic block is provided on the outside of the front moving diameter small ring. As a further description of the above technical solution: The flexible conical telescopic sleeve has a retractable air intake plate on the inner side of its front end for gathering the central airflow to enhance the central thrust. The flexible conical telescopic sleeve has an installation pin on the outer side of its front end. The front end of the flexible conical telescopic sleeve is fixedly connected to the installation hole on the inner side of the front moving diameter small ring through the installation pin. The rear end of the flexible conical telescopic sleeve is fixed to the front side of the rear fixed large ring. As a further description of the above technical solution: The circumferential drainage ring includes a filling ring, which is embedded inside the wall of the inverted output tube. The filling ring has multiple spiral swirling channels inside, which are evenly opened along the inner circumference of the filling ring. The channel outlet is inclined towards the output end along the tangent direction of the tube wall to form a wall-attached swirling flow to achieve circumferential pressure equalization. As a further description of the above technical solution: The filling ring is divided into an outer ring and an inner ring. The outer ring of the filling ring is a rigid structure and its shape fits the inner wall of the flip-out output tube. The inner ring of the filling ring is an elastic structure, which adapts to fit the outer side of the flexible conical telescopic sleeve to form a sealing layer, so that the circumferential gas can only flow through the spiral swirling channel inside the filling ring. As a further description of the above technical solution: The flip-out output pipe includes a sealing docking ring, a mounting flange, and a tapered pipe. The sealing docking ring is fixedly installed at the front output port of the pressure-bearing shell. The mounting flange is connected to the front end of the sealing docking ring and is used to dock and fix with the pressure-bearing shell. The tapered pipe is set at the front end of the mounting flange and is used to receive and repair the pipe. As a further description of the above technical solution: The inner wall of the tapered tube is provided with multiple sets of repulsive magnetic plates. The magnetism of multiple repulsive magnetic plates in the same set gradually increases along the gas output direction. The repulsive magnetic plates correspond to the driving magnetic blocks outside the front moving diameter small ring and are used to provide magnetic repulsion to assist the front moving diameter small ring in contraction. As a further description of the above technical solution: The bottom of the pressure-bearing housing is connected to a movable base, and a winding drum assembly is rotatably connected inside the pressure-bearing housing. A handwheel is provided on the side of the pressure-bearing housing, and the handwheel is connected to the winding drum assembly for driving the winding drum assembly to wind up and unwind the resin hose. As a further description of the above technical solution: The top of the pressure-bearing shell is connected to an observation window and a pressure monitoring unit. The rear part of the pressure-bearing shell is connected to an air inlet and a pressure relief port. The air inlet is used to introduce compressed air into the pressure-bearing shell, and the pressure relief port is used to discharge the gas in the cavity to relieve pressure.

[0006] Compared with the prior art, the advantages of the present invention are as follows: 1. The large ring at the rear end of the central self-expanding conical guide and shaping cylinder is anchored inside the flipping output pipe. Powered by the internal air pressure, it drives the flexible conical telescopic sleeve to produce axial and radial deformation. This, in conjunction with multiple sets of small front-end moving diameter rings, synchronously completes the forward extension and retraction movements along the trajectory of the inward retraction rod. Combined with the magnetic repulsion force of the driving magnetic block and gradient repulsion magnetic plate, the retractable airflow-facing plate synchronously closes the airflow channel with the front end. This achieves the beneficial effects of central pre-top shaping and concentrated main propulsion during the operation phase, effectively reducing the risk of collapse and inward flipping of large-diameter hoses during initial flipping, and improving the regularity of the flipping propulsion.

[0007] 2. The filling ring of the circumferential flow guide ring is coaxially embedded inside the wall of the inverted output pipe. Compressed air enters the filling ring and is ejected tangentially forward along the evenly distributed spiral swirl channel. The outer ring of the filling ring rigidly adheres to the pipe wall, while the inner ring elastically follows and adheres to the flexible conical sleeve, maintaining a dynamic annular seal throughout. All airflow is output through the swirl channel, forming a wall-adhering swirl. This achieves the beneficial effect of uniform pressure distribution throughout the circumference, suppresses circumferential wrinkles and serpentine offset, and forms a gradient with the central thrust to create an arc-shaped propulsion, improving the tightness of the fit between the liner and the original pipe. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main body of an embodiment of a flexible hose flipping and lining device for pipe lining repair proposed in this invention; Figure 2 This is a schematic diagram of the pressure-bearing outer shell of a flexible hose inverting lining device for pipe lining repair proposed in this invention. Figure 3 This is a schematic diagram of the structure of the flip-out output pipe of a flexible hose flip-out lining device for pipe lining repair proposed in this invention. Figure 4 This is a schematic diagram of the flow guiding mechanism of a hose flipping lining device for pipe lining repair proposed in this invention; Figure 5 This is a schematic diagram of the circumferential drainage ring of a flexible hose flipping lining device for pipe lining repair proposed in this invention. Figure 6 This is an exploded view of the central self-expanding conical guide and shaping cylinder of a hose flipping lining device for pipe lining repair proposed in this invention; Figure 7 This is a schematic diagram of the front dynamic diameter small ring of a flexible hose flipping lining device for pipe lining repair proposed in this invention. Figure 8 This is a schematic diagram of the flexible conical telescopic sleeve of a hose flipping lining device for pipe lining repair proposed in this invention.

[0009] Labeling Explanation: 1. Pressure-bearing outer shell; 2. Winding drum assembly; 3. Handwheel; 4. Observation window; 5. Air inlet; 6. Pressure relief port; 7. Pressure monitoring unit; 8. Tilting output pipe; 801. Sealing docking ring; 802. Mounting flange; 803. Tapered tube; 804. Repulsive magnetic plate; 9. Flow guiding mechanism; 91. Circumferential flow guiding ring; 911. Filling ring; 912. Spiral vortex channel; 92. Central self-expanding tapered flow guiding and shaping cylinder; 921. Rear end fixing large ring; 922. Front end moving diameter small ring; 923. Inner retraction rod; 924. Drive magnetic block; 925. Mounting hole; 926. Flexible tapered telescopic sleeve; 927. Retractable flow guide plate; 928. Mounting pin; 10. Movable base. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 8 The diagram shows an embodiment of a flexible hose inversion and lining device for pipeline lining repair provided by the present invention. The device includes a pressure-bearing outer shell 1, which forms a sealed pressure working chamber, providing a stable air pressure environment for hose inversion and simultaneously supporting all internal functional components to ensure overall structural strength. An inversion output pipe 8 is connected to the front of the pressure-bearing outer shell 1, forming a transition channel for hose inversion output, connecting the pressure-bearing outer shell 1 and the pipeline to be repaired, and providing an installation carrier for the internal flow guiding mechanism 9. The flow guiding mechanism 9 is installed inside the inversion output pipe 8, integrating central flow guiding and shaping with circumferential pressure equalization and air distribution, optimizing the airflow distribution within the pipe and improving the quality of hose inversion forming.

[0011] The bottom of the pressure-bearing outer shell 1 is connected to a movable base 10, which enables on-site transfer and positioning of the equipment, adapting to the relocation needs of different wellhead operation locations and improving construction flexibility. Inside the pressure-bearing outer shell 1, a winding drum assembly 2 is rotatably connected. The winding drum assembly 2 systematically houses the resin-impregnated inner lining hose, controlling the hose release rhythm to ensure uniform advancement during the rotation process. A handwheel 3 is located on the side of the pressure-bearing outer shell 1, which is connected to the winding drum assembly 2 for driving the winding drum assembly 2 to wind and unwind the resin hose, enabling manual adjustment of the hose winding and unwinding speed to adapt to the speed requirements of different construction conditions. The top of the pressure-bearing outer shell 1 is connected to a viewing platform. The observation window 4 provides a visual window for internal operations, allowing operators to monitor hose balance and rotation status in real time and quickly troubleshoot any abnormalities. The pressure monitoring unit 7 monitors the working air pressure inside the cavity in real time, providing a direct basis for pressure regulation and ensuring that the construction pressure remains stable within the process range. The rear part of the pressure-bearing outer shell 1 is connected to an air inlet 5 and a pressure relief port 6. The air inlet 5 is used to introduce compressed air into the pressure-bearing outer shell 1 to provide pressure power for the rotation operation inside the cavity, and the air inlet flow can be adjusted. The pressure relief port 6 is used to discharge gas from the cavity to achieve pressure relief, ensuring smooth pressure relief and safe and smooth mechanism reset after the operation is completed.

[0012] The flow guiding mechanism 9 includes a circumferential flow guiding ring 91 and a central self-expanding conical flow guiding and shaping cylinder 92. The circumferential flow guiding ring 91 is coaxially embedded in the inner wall of the flip-out output pipe 8. The circumferential flow guiding ring 91 constructs a circumferentially uniform swirling air distribution structure to achieve uniform circumferential pressure distribution inside the pipe and eliminate circumferential pressure difference. The central self-expanding conical flow guiding and shaping cylinder 92 is coaxially suspended in the central area of ​​the flip-out output pipe 8. The central self-expanding conical flow guiding and shaping cylinder 92 constructs a centrally deformable flow guiding structure to achieve working condition adaptation of fully open pipe diameter during the pipe insertion stage and central shaping during the operation stage.

[0013] The central self-expanding conical guide and shaping cylinder 92 includes a rear fixed large ring 921, a flexible conical telescopic sleeve 926, and a front moving diameter small ring 922. The rear fixed large ring 921 is fixed inside the flip-out output pipe 8, anchoring the rear end of the central guide structure and providing a fixed reference for the flexible conical sleeve and the front end assembly, ensuring structural coaxiality. The flexible conical telescopic sleeve 926 connects the rear fixed large ring 921 and the front moving diameter small ring 922. Under the action of the internal air pressure, the flexible conical telescopic sleeve 926 undergoes axial and radial deformation, transmitting pressure power and simultaneously sealing the central air passage. Under the action of the internal air pressure, it can drive the front moving diameter small ring 922 to synchronously complete axial forward extension. The front moving diameter small ring 922 synchronously completes the extension under the action of air pressure. Axial extension and radial contraction, the center of the push hose end face is pre-shaped, and at the same time constitutes the central nozzle of contraction; an inner retraction rod 923 is provided between two adjacent front moving diameter small rings 922, the inner retraction rod 923 connects the adjacent front moving diameter small rings 922, constrains the contraction movement trajectory, ensures that the whole ring contracts synchronously and uniformly, and maintains a perfect circle shape; a return spring is provided between the inner retraction rods 923, the return spring provides a return elastic force after pressure is released, driving the front moving diameter small rings 922 to open outward radially, restoring the initial large diameter state; a driving magnetic block 924 is provided on the outside of the front moving diameter small rings 922, the driving magnetic block 924 cooperates with the repulsive magnetic plate 804 on the inner wall of the tapered tube 803 to generate magnetic repulsion force, assisting in driving the front moving diameter small rings 922 to complete the forward extension and contraction action.

[0014] The flexible conical telescopic sleeve 926 has a retractable anti-aircraft plate 927 on the inner side of its front end for gathering the central airflow to enhance the central thrust. The flexible conical telescopic sleeve 926 has an installation pin 928 on the outer side of its front end. The installation pin 928 securely connects the front end of the flexible conical telescopic sleeve 926 to the front moving diameter small ring 922, ensuring synchronous deformation without falling off. The front end of the flexible conical telescopic sleeve 926 is fixedly connected to the installation hole 925 on the inner side of the front moving diameter small ring 922 through the installation pin 928. The rear end of the flexible conical telescopic sleeve 926 is fixed to the front side of the rear fixed large ring 921.

[0015] The circumferential drainage ring 91 includes a filling ring 911, which is embedded inside the wall of the inverted output pipe 8. The filling ring 911 provides a carrier for the arrangement of the swirling channels and forms a sealed boundary for the circumferential gas path. Multiple spiral swirling channels 912 are provided inside the filling ring 911. The spiral swirling channels 912 are evenly opened along the inner circumference of the filling ring 911. The channel outlet is inclined towards the output end along the tangent direction of the pipe wall to form a wall-attached swirling flow to achieve circumferential pressure equalization.

[0016] The filling ring 911 is divided into an outer ring and an inner ring. The outer ring of the filling ring 911 is a rigid structure, which fits the inner wall of the flip-out output pipe 8 to ensure the structural strength and positioning accuracy of the circumferential gas path. The inner ring of the filling ring 911 is an elastic structure, which adapts to fit the outer side of the flexible conical telescopic sleeve 926 to form a sealing layer, so that the circumferential gas can only flow through the spiral swirling channel 912 inside the filling ring 911.

[0017] The flip-out output pipe 8 includes a sealing ring 801, a mounting flange 802, and a tapered pipe 803. The sealing ring 801 is fixedly installed at the front outlet of the pressure-bearing housing 1, and the sealing ring 801 achieves a sealed connection between the flip-out output pipe 8 and the pressure-bearing housing 1 to prevent pressure leakage and ensure stable cavity pressure. The mounting flange 802 is connected to the front end of the sealing ring 801 and is used to connect and fix with the pressure-bearing housing 1, providing a tight connection interface between the flip-out output pipe 8 and the pressure-bearing housing 1 to ensure connection strength and assembly coaxiality. The tapered pipe 803 is set at the front end of the mounting flange 802 to form a gradually changing output channel for the pipe to be repaired, guiding the hose smoothly into the pipe to be repaired and adapting to the docking requirements of different pipe diameters. The inner wall of the tapered tube 803 is provided with multiple sets of repulsive magnetic plates 804. The magnetism of multiple repulsive magnetic plates 804 in the same set gradually increases along the gas output direction. The repulsive magnetic plates 804 correspond to the driving magnetic block 924 outside the front moving diameter small ring 922, and are used to provide magnetic repulsion to assist the front moving diameter small ring 922 in contraction, forming a gradient-enhanced magnetic field along the gas output direction, ensuring that the auxiliary thrust gradually increases with the stroke.

[0018] Working principle: First, the entire equipment is moved to the wellhead operation position of the pipeline to be repaired by the movable base 10, and the casters of the movable base 10 are locked to complete the equipment positioning; check the sealing status of each part of the pressure-bearing shell 1, confirm that the observation window 4 is closed and locked, confirm that the air inlet 5 and the pressure relief 6 are in the closed state, read the initial value of the pressure monitoring unit 7, and confirm that the internal pressure is balanced with the external atmospheric pressure; check that the sealing ring 801 and the mounting flange 802 of the flip output pipe 8 are connected and tightened, confirm that the front end of the tapered pipe 803 is regular, and that the flow guiding mechanism 9 is in the initial reset state.

[0019] Open the observation window 4 on the top of the pressure-bearing housing 1. The operator operates through the observation window 4 by turning the handwheel 3 on the side of the pressure-bearing housing 1. The handwheel 3 drives the internal winding drum assembly 2 to rotate, gradually releasing the resin-impregnated hose pre-wound onto the winding drum assembly 2. After the hose head comes off the winding drum assembly 2, it travels forward along the central channel inside the pressure-bearing housing 1, enters the flip-out output pipe 8, and passes through the central area of ​​the flow guiding mechanism 9. In this state, the central self-expanding conical flow guiding and shaping cylinder 92 is in a naturally open state, and the rear fixed large ring 921 remains fixed. The flexible conical telescopic sleeve 926 is in the large-diameter extended state, the front moving diameter small ring 922 is at the end of the stroke, the inner retraction rod 923 between adjacent front moving diameter small rings 922 maintains the extended length, the retractable air intake plate 927 opens synchronously with the front moving diameter small ring 922, the central diameter reaches the maximum value, the hose can pass smoothly through the central area without scratching the internal components; the hose continues to pass forward through the conical tube 803, and finally is pulled out from the front end of the tube to the set length, and the end of the hose is circumferentially fixed to the front flange of the conical tube 803, completing the installation preparation.

[0020] Close and lock the observation window 4, slowly open the air inlet 5, and introduce compressed air into the pressure-bearing outer shell 1. The pressure inside the cavity gradually increases, and the pressure monitoring unit 7 displays the pressure value inside the cavity in real time. As the pressure inside the cavity rises, the pressure acts simultaneously on the circumferential flow guide ring 91 of the flow guide mechanism 9 and the central self-expanding conical flow guide shaping cylinder 92. For the central self-expanding conical flow guide shaping cylinder 92, the air pressure acts on the inner conical surface of the flexible conical telescopic sleeve 926, generating two components: axial forward and radial inward. The axial component pushes the front moving diameter small ring 922 to move forward axially, and the radial component, in conjunction with the linkage of the inner retraction rod 923, drives each section of the front moving diameter small ring 922 to retract radially inward synchronously. The driving magnetic block 924 on the outside of the front moving diameter small ring 922 moves forward and gradually approaches the repulsive magnetic plate 804 set on the inner wall of the conical tube 803. The repulsive magnetic plate 804 gradually strengthens its magnetism along the gas output direction, generating a gradually increasing magnetic repulsive force on the driving magnetic block 924, which assists in pushing the front moving diameter small ring 922 to complete the forward extension and retraction action; the flexible conical telescopic sleeve 926 deforms, elongates and narrows synchronously with the front moving diameter small ring 922, and the retractable air-receiving plate 927 on the inner side of the front end contracts synchronously, closing the central airflow channel; at the same time, some compressed air enters the filling ring 911 of the circumferential guide ring 91. The outer ring rigid structure of the filling ring 911 fits against the pipe wall, and the inner ring elastic structure fits against the outer wall of the flexible conical telescopic sleeve 926 to form a seal. The airflow can only flow through the spiral vortex channel 912 that is evenly distributed circumferentially inside the filling ring 911, and finally sprays out at an angle towards the output end along the tangential direction of the pipe wall, forming a spiral airflow that adheres to the wall and moves forward on the inner wall of the conical pipe 803.

[0021] When the pressure inside the cavity rises to the set working pressure, the opening of the air inlet 5 is adjusted, and with the feedback from the pressure monitoring unit 7, the pressure inside the cavity is kept stable. The compressed air in the central area is concentrated and ejected through the front moving diameter small ring 922 after contraction, forming a high-speed central airflow that acts on the central area of ​​the end face of the resin hose. The circumferential spiral airflow moves forward along the pipe wall and acts evenly on the circumferential edge of the resin hose flipping lip. Under the combined action of the central concentrated thrust and the circumferential uniform pressure, the hose flipping lip continues to flip forward in an arc shape and enters the inside of the pipe to be repaired through the tapered tube 803. During the operation, the operator can check the remaining amount of hose and the flipping status through the observation window 4, and simultaneously rotate the handwheel 3 to control the release speed of the winding drum assembly 2 so that the hose release speed matches the flipping propulsion speed. The inner ring elastic structure of the filling ring 911 adapts to the radial deformation of the flexible tapered telescopic sleeve 926, always maintaining an annular seal, ensuring that all circumferential airflow is ejected through the spiral swirl channel 912, maintaining a swirling pressure uniformity.

[0022] After the hose is flipped to the set length, the air inlet 5 is closed and the pressure relief port 6 is slowly opened. The compressed air inside the pressure-bearing shell 1 is gradually discharged, and the pressure inside the cavity drops steadily. As the pressure inside the cavity decreases, the pressure acting on the flexible conical telescopic sleeve 926 gradually disappears. The flexible conical telescopic sleeve 926 begins to recover its deformation due to its own elasticity, which drives the front moving diameter small ring 922 to move backward along the axial direction. The driving magnetic block 924 moves backward with the front moving diameter small ring 922, and the magnetic repulsion gradually weakens. At the same time, the return spring between the inner retraction rods 923 automatically recovers due to the weakening of the magnetic repulsion, which in turn drives the front moving diameter small ring 922 to open outward along the radial direction. The retractable flow-receiving plate 927 opens synchronously with the front moving diameter small ring 922, and the central diameter gradually expands to facilitate the next hose insertion. The circumferential spiral airflow gradually weakens as the pressure inside the cavity decreases until it stops completely. When the pressure monitoring unit 7 shows that the pressure inside the cavity has dropped back to atmospheric pressure, the pressure relief is completed, and the flow guiding mechanism 9 returns to its initial open state.

[0023] After depressurization, open the observation window 4 to check the condition of the internal hose and the reset status of the mechanism. Cut off the protruding end of the hose to complete the preparatory work for the flipping and lining process. Loosen the caster lock of the movable base 10 to move the equipment to the next work point or store the equipment to complete this construction.

Claims

1. A soft pipe inversion lining installation for use in the repair of pipe linings, comprising a pressure shell (1), characterised in that: The front side of the pressure-bearing shell (1) is connected to a flip-out output pipe (8), and a flow guiding mechanism (9) is provided inside the flip-out output pipe (8). The flow guiding mechanism (9) includes a circumferential flow guiding ring (91) and a central self-expanding conical flow guiding and shaping cylinder (92). The circumferential flow guiding ring (91) is coaxially embedded in the inner wall of the flip output pipe (8), and the central self-expanding conical flow guiding and shaping cylinder (92) is coaxially suspended in the central area of ​​the flip output pipe (8). The central self-expanding conical guide and shaping cylinder (92) includes a rear fixed large ring (921), a flexible conical telescopic sleeve (926), and a front moving diameter small ring (922). The rear fixed large ring (921) is fixed inside the flip output tube (8). The flexible conical telescopic sleeve (926) is connected between the rear fixed large ring (921) and the front moving diameter small ring (922). Under the action of the air pressure in the cavity, it can drive the front moving diameter small ring (922) to complete the axial extension synchronously. An inner retraction rod (923) is provided between two adjacent front moving diameter small rings (922). A reset spring is provided between the inner retraction rods (923). A driving magnetic block (924) is provided on the outside of the front moving diameter small ring (922).

2. A soft hose inversion lining installation apparatus for use in the repair of a pipe lining as claimed in claim 1, characterised in that: The flexible conical telescopic sleeve (926) has a retractable air intake plate (927) on the inner side of its front end for gathering the central airflow to enhance the central thrust. The flexible conical telescopic sleeve (926) has an installation pin (928) on the outer side of its front end. The front end of the flexible conical telescopic sleeve (926) is fixedly connected to the installation hole (925) on the inner side of the front end moving diameter small ring (922) through the installation pin (928). The rear end of the flexible conical telescopic sleeve (926) is fixed to the front side of the rear end fixed large ring (921).

3. A soft hose inversion apparatus for use in the repair of a pipe lining according to claim 1, characterised in that: The circumferential drainage ring (91) includes a filling ring (911), which is embedded in the inside of the wall of the inverted output pipe (8). The filling ring (911) has multiple spiral swirling channels (912) inside. The spiral swirling channels (912) are evenly opened along the inner circumference of the filling ring (911), and the channel outlet is inclined towards the output end along the tangent direction of the pipe wall to form a wall-attached swirling flow to achieve circumferential pressure equalization.

4. A soft hose inversion lining installation apparatus for use in the repair of a pipe lining as claimed in claim 3, characterised in that: The filling ring (911) is divided into an outer ring and an inner ring. The outer ring of the filling ring (911) is a rigid structure and its shape fits the inner wall of the flip-out output tube (8). The inner ring of the filling ring (911) is an elastic structure, which adapts to fit the outer side of the flexible conical telescopic sleeve (926) to form a sealing layer, so that the circumferential gas can only flow through the spiral swirling channel (912) inside the filling ring (911).

5. A soft hose inversion apparatus for use in the lining of pipes for rehabilitation according to claim 1, characterized in that: The flip-out output pipe (8) includes a sealing docking ring (801), a mounting flange (802), and a tapered pipe (803). The sealing docking ring (801) is fixedly installed at the front end of the pressure-bearing shell (1). The mounting flange (802) is connected to the front end of the sealing docking ring (801) for docking and fixing with the pressure-bearing shell (1). The tapered pipe (803) is located at the front end of the mounting flange (802) for receiving and repairing the pipe.

6. A soft hose inversion lining installation apparatus for use in the repair of a pipe lining as claimed in claim 5, characterised in that: The inner wall of the tapered tube (803) is provided with multiple sets of repulsive magnetic plates (804). The magnetic properties of the multiple repulsive magnetic plates (804) in the same set gradually increase along the gas output direction. The repulsive magnetic plates (804) correspond to the driving magnetic blocks (924) outside the front moving diameter small ring (922) and are used to provide magnetic repulsion to assist the front moving diameter small ring (922) in contraction.

7. A soft hose inversion apparatus for use in the lining of pipes for rehabilitation according to claim 1, characterized in that: The bottom of the pressure-bearing housing (1) is connected to a movable base (10), and the inside of the pressure-bearing housing (1) is rotatably connected to a winding cylinder assembly (2). A handwheel (3) is provided on the side of the pressure-bearing housing (1), and the handwheel (3) is connected to the winding cylinder assembly (2) for driving the winding cylinder assembly (2) to retract and extend the resin hose.

8. A soft hose inversion apparatus for use in the lining of pipes for rehabilitation according to claim 1, characterized in that: The top of the pressure-bearing shell (1) is connected to an observation window (4) and a pressure monitoring unit (7). The rear part of the pressure-bearing shell (1) is connected to an air inlet (5) and a pressure relief port (6). The air inlet (5) is used to introduce compressed air into the pressure-bearing shell (1), and the pressure relief port (6) is used to discharge the gas in the cavity to achieve pressure relief.

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