TWI425134B - Method and machine for reinforcing an embedded cylindrical pipe - Google Patents

Description

Method for reinforcing in-line cylindrical pipe and machine thereof

The present invention relates to a method of reinforcing a pipe, and more particularly to repairing an in-line pipe.

The pipeline, for example, belongs to a water supply network. In the most common form of these pipes, these pipes are formed by pre-stressed concrete and are assembled end-to-end with relatively large diameter pipe sections typically sized from 0.5 meters to 6 meters. Water flows through the above pipes at pressures up to about 20 bar. The sections of these concrete pipes may contain internal metal cylinders (liners). However, the latter is not designed to withstand the stresses generated by fluid flow through the pressure. These stresses are absorbed by passively strengthened layers (prefabricated cylindrical reinforced layer covers) or by prestressing of concrete. The latter is achieved by means of a winding wire outside the spiral of the concrete core of the pipe section. In the manufacture of such segments, the segment concrete core is rotated about the shaft to receive the wire and is tested to withstand the pressure. The wire is then protected from erosion by designing an additional layer of 20 to 30 mm thick concrete or mortar.

The pipe wall usually contains a concrete core consisting of a waterproof liner consisting of a malleable cylinder made of thin steel (so-called in-line cylindrical pipe). The core of the concrete is distributed between the inner layer and the thicker outer layer with a thickness of several centimeters, the inner layer is located inside the pipe, and the outer layer is not reinforced in most cases; and the pre-pressure wire is wound around the concrete core one or two layers Protective erosive mortar bag Enclose the wire to passivate the wire; and have an optional coating or resin to improve corrosion protection.

This type of pipe is often in-line. Depending on the corrosive nature of the environment, this pipeline is at risk of being eroded. The most common form of aging is as follows. The movement of the aggressive ions through the protective layer; the erosion of the prestressed wires; the rupture and local delamination of the prestressed wires; the overall delamination of the external mortar; and the depassivation and accelerated erosion of the wires.

This process then accelerates and causes the pipe to rupture. Magnetic or acoustic detection methods can locate cracks in the wire and evaluate the condition of the pipe. And depending on the status of the assessment, the repair measures to be taken are determined.

Patching is usually performed from the outside. For example, a new reinforcement layer is placed, providing passive or pre-stressed repairs, and placed around the pipe to catch the pipe. See, for example, International Patent Application published as WO 03/014614.

In order to rebuild the barrier lost by breaking the prestressed wire, it is also possible to perform the repair from the inside by merging the solid core into the pipe. Often, patches that are performed internally are more expensive. Such repairs are performed when it is impossible or difficult to perform excavation work.

Typically, internal repairs also involve placing a metal liner into the pipe. Fill the gap between the new sturdy liner and the pipe with mortar. One of the difficulties is that if a local error occurs in the implementation, water will seep into the injection gap. The infiltration of water causes the concrete core of the pipe to withstand the pressure and renders the new robust liner inefficient. It will cause damage to the external piping of the new liner.

Another difficulty is that the above method must weld the new metal liner longitudinally and laterally in situ. Such welding can cause failure due to difficulty in execution and control, thereby causing cracking of the pipe being repaired.

When repairing from the inside, it is not possible to pre-stress the added strengthening layer. When the pipeline is under pressure, these reinforcement layers undergo some elastic deformation (increased diameter), which will cause cracking of the core concrete of the pipeline. For very small deformations, the concrete breaks due to stretching and no material can withstand the significant stresses of such stretching. The rupture of concrete causes two disadvantages. The bending strength of the pipe is impaired and thus the ability to withstand the asymmetric driving forces of the earth is impaired, while at the same time allowing erosion to enter the interior of the pipe from the external environment. If it is metallic, this will lead to the risk of eroding the new strengthening layer at an early stage. This problem often leads to solutions that are internally repaired based on the metal liner to be discussed.

An alternative is disclosed in US 2005/0246995 A1, in which a composite structural reinforcement layer is applied by layering the reinforcing layer fibers and the resin matrix of at least one interlayer in situ, and the interlayer is substantially in accordance with the inner side of the pipe. A spiral path is arranged.

When the pipe is reused, the liquid pressure tensions the fibers of the interlayer, and if the interlayer has a suitable appearance size, it will be able to withstand most of the radial pressure. This composite structure avoids the risk of erosion from metal liner solutions. This spiral layout allows for the implementation of an in-situ reinforcement layer of composite material that simplifies implementation and avoids the problem of waterproof joints that cover each wire with itself.

While this method of reinforcing in-line cylindrical tubing has very high efficiency, it has been noted that when using standard methods, such as manual application of the interlayer, it can be difficult and time consuming to apply a strong or fibrous interlayer.

For example, it has been noted that when the working conditions are unsatisfactory, the interlayer can be partially removed or twisted.

It is an object of the present invention to provide a perfect and efficient method of applying a reinforcing layer fiber reinforced tape where the application conditions are safe and controlled throughout the process.

Therefore, the present invention provides a method for reinforcing an in-line cylinder by layering at least one reinforcing tape in situ, thereby applying a composite structural strengthening layer inside the pipe, the reinforcing tape comprising the reinforcing layer fiber and a resin or a matrix. A resin comprising the following steps. First, a reinforcing tape is applied to the contact area of the inner surface of the pipe through the contact member; the contact member is moved along the spiral path so that the contact region moves along the spiral path; and the main pressing member moves along the spiral path after the contact member, and contacts The reinforced zone in the main pressure zone of the zone separation exerts pressure.

Therefore, it is possible to carefully control the conditions under which the reinforcing tape is applied to the inner surface of the pipe.

Due to the steps of continuous contact and extrusion of the reinforcing strip, it is especially possible to control the level of stress in the reinforcing strip during application and to avoid preferentially partially disassembling or squeezing the reinforcing strip on the inner face of the pipe. Then, the reinforced tape along the pipe is evenly delaminated, and the repaired portion is strong and can withstand radial stress.

According to the invention, the reinforcement layer is applied to the contact area on the inner surface of the pipe The reinforcing tape of the fiber may be impregnated with no resin, or partially or completely with a resin or a resin containing a matrix.

For example, a resin suitable for the present invention is a thermosetting resin such as an epoxy-based resin or a thermoplastic resin.

In accordance with an embodiment of the present invention, the reinforcing tape consists essentially of carbon fibers having a well-recognized quality as reinforcing fibers.

According to another embodiment, the reinforcing tape consists essentially of glass fibers.

In an advantageous embodiment, the reinforcing tape is a braid, for example a unidirectional braid.

According to another embodiment, the fibers of the reinforcing tape are continuous unidirectional fibers.

According to another embodiment, the reinforcing tape is advantageously pre-impregnated with at least one resin or a resin comprising a matrix using a thermoplastic resin.

The prepreg resin may be a thermosetting resin or a thermoplastic resin. When a thermoplastic resin is used, it is possible to heat the pre-impregnated reinforcing tape when the reinforcing tape is applied to the contact area of the inner surface of the pipe or before, so as to melt or soften the resin when pressure is applied in the main pressure region, and the reinforcing tape is adhered live.

According to one embodiment, the reinforcing fibers are not used with a resin or a resin containing a matrix, and then impregnated in situ with a resin or a resin containing a matrix to form a reinforcing tape.

According to another embodiment, the method comprises the following steps. The coating member is moved along a spiral path; the inner surface of the pipe in the coating region before the contact region is coated with a resin or a resin containing the substrate.

Therefore, it is possible to pre-coat the inner surface of the pipe before applying the reinforcing tape. The resin of this step may be the same or of a different type than the resin of the layering process.

According to another embodiment, the method of the present invention comprises the steps of: moving the coating member along the spiral path; coating the previously applied surface on the inner surface of the pipe with a resin or a resin comprising a matrix in the coating region behind the contact region The reinforcing tape is applied to the reinforcing tape in the auxiliary pressure region located behind the main pressure region through the auxiliary pressing member.

Therefore, it is possible to apply a resin or a resin containing a matrix to the previously applied reinforcing tape, and to impregnate the reinforcing tape.

The coating member and the auxiliary pressing member may be separate members such as a roller. It is also a separate component. The spray injection member may be a coating member.

According to another embodiment, the fibers are reinforced with a resin or a resin comprising a matrix prior to applying the reinforcing tape to the contact area.

According to this embodiment, the reinforcing fibers are impregnated through a roller containing a resin or a resin containing a matrix.

According to the previous embodiment, the resin or the resin containing the matrix can be obtained by mixing at least one unpolymerized resin and a hardener just before the coating step. This embodiment is advantageous when a two component resin, such as a two component epoxy resin, is used.

In another embodiment, the reinforcing tape is provided to the contact area of the inner surface of the pipe at a first movement rate V ₁ ; and the reinforcing zone is pressed against the inner surface of the pipe in the main pressure region at a second movement rate V ₂ Wherein the second rate of motion V _{2 is} less than the first rate of motion V ₁ and the second rate of motion V ₂ is 90% of the first rate of motion V ₁ , in particular at least 95%.

In an advantageous embodiment, the second rate of motion V ₂ is between 98% and 99% of the first rate of motion V ₁ .

Therefore, it is possible to release the stress in the reinforcing band between the contact region and the main pressure region. The reinforced tape can be unstressed and is very suitable for the inner face of the pipe, even if there are defects on the inner face.

According to a further advantageous embodiment, the axial forward movement rate V _F along the pipe during the stratification process is determined by the second movement rate V ₂ .

According to the previous embodiment, the forward motion rate V _F is approximately V _F =V ₂ *W/(2Π*R*N), where: W is the width of the reinforcing strip; R is the radius of the inner surface of the tube; N composite material The number of reinforcing bands of the structural strengthening layer.

Next is an example of a repair process in which the rate of motion is less than 1 meter per minute at the beginning of the stratification process and is gradually increased to a constant rate of motion of 5 to 10 meters per minute, for example 8 meters per minute.

In another embodiment, the contact member and/or the primary extrusion member can be radially adjusted to maintain contact with the inner face of the conduit.

It is then possible to contact and/or squeeze the inner face at a constant pressure throughout the repair process.

The radially adjustable distance of the contact member and/or the extruded member is also advantageous for adapting to different pipe diameters.

In another embodiment, the contact member includes a roller that is driven by a pulley that contacts the inner surface of the conduit prior to application of the composite structural reinforcement layer, where the circumferential velocity of the roller is increased as compared to the circumferential velocity of the pulley. The peripheral speed of the pulley is driven by the forward motion rate V _F and is very close to the second rate of motion V ₂ .

Following another embodiment, the reinforcing strip is released from the drum prior to contacting the inner face of the pipe.

The drum can be positioned inside the pipe to be repaired, preferably at a forward rate of motion V _F or outside of the pipe and reinforced strip introduced through the pipe bore.

In an advantageous embodiment, the tension of the release reinforcing strip is adjusted so that the reinforcing strip is free of stress when applied to the contact area.

According to previous embodiments, the contact pressure in the contact area and/or the pressure in the main pressure region can be adjusted, and the contact pressure and pressure remain substantially constant along the helical path.

In another aspect of the invention, a machine for reinforcing an inner surface of an in-line cylindrical pipe is provided, which has a composite structural reinforcement layer comprising at least a reinforcing fiber and a resin or a reinforcing tape comprising a matrix resin. The machine comprises: a contact member, a pressing member and a moving member capable of applying a reinforcing tape to the inner surface of the pipe. The extruded member is capable of applying pressure to the reinforcing belt facing the inside of the pipe. The moving member is capable of moving the contact member and the pressing member along the spiral path. among them There is an angular offset between the contact member and the extruded member.

The use of this machine makes it possible to repair the pipe in accordance with the previous method of reinforcing the in-line cylindrical pipe. And it is convenient to automate this machine.

Process parameters can be controlled through control components.

The angle α between the contact member and the extruded member is preferably 5° to 30°, advantageously greater than 7° and/or less than 15°, such as less than 10°.

According to an embodiment, the machine further comprises a reinforced belt supply member, for example comprising a reinforced belt drum. Since the reinforced tape supply member is part of the machine, it is possible to run the process completely from inside the pipe.

According to the previous embodiment, the rotation rate of the reinforcing belt roller can be adjusted by a rotating device such as a weight and an engine. It is more convenient to mount the reinforced belt roller on the free roller, where a jack is attached.

In another embodiment, the supply member includes at least one drive and tension roller. By adjusting this drive and tension tension, there is no stress in the reinforced tape.

Next, in another embodiment, the moving member includes a rotating member whose rotating shaft is movable to match the longitudinal axis of the pipe and a forward moving member.

In an advantageous embodiment, the rotating member comprises a rotating engine coupled to a vertical sliding member.

According to previous embodiments, the rotating member can include a swivel joint that is coupled to a rotating engine.

According to another embodiment, the contact member and the extruded member are a single rotating member In part, the rotating component includes a rotating shaft coupled to a rotating member.

In an advantageous embodiment, the machine further comprises a coating member comprising, for example, a coating drum capable of coating the inner surface of the pipe and connected to the moving member, and the coating roller and the contact member and the pressing member Has an angular offset.

According to a previous embodiment, the coating drum is supplied by a plurality of supply members, for example comprising a plurality of tubes, connected to at least one container.

In accordance with another embodiment, the machine further includes an immersion drum positioned between the reinforced belt supply member and the contact member along the reinforced belt path. The dip roller can be located between the drive and tension roller and the contact member. And the dipping drum may be surrounded by a resin or a resin containing a matrix to keep the outer casing supplied by the supply member.

According to a previous embodiment, the machine comprises at least two separate containers, wherein the first container is adapted to contain unpolymerized resin and the second container is adapted to contain a hardener, wherein the unpolymerized resin and hardener are mixed in the vicinity of the coating drum.

According to one embodiment, the contact member and/or the pressing member are coupled to the rotating shaft through a radially extendable arm.

According to previous embodiments, the radially extendable arms can be radially adjusted by manipulating a pneumatic jack.

In an advantageous embodiment, the contact member and/or the pressing member comprise a roller and/or a blade and/or a brush.

In still another advantageous embodiment, the contact member comprises a roller driven by a pulley adapted to contact the inner surface of the pipe, the pulley being increased at a circumferential rate And connected to the drum.

In another embodiment, the machine includes a forward moving member that includes a drive pulley adapted to contact the inner face of the pipe, the drive pulley being moved by the motor through a stabilizing member.

According to the previous embodiment, the stabilizing member may comprise two inclined pulleys positioned from each side of the drive pulley and capable of contacting the inner face of the pipe, the pulley being coupled to the arm in an adjustable position along the arm.

In a further advantageous embodiment, the machine further comprises a front wheel. The front wheel is used to position the machine during forward movement.

In a preferred embodiment, the front wheel is located before the drive wheel.

In another advantageous embodiment, the machine further comprises a gyroscope, such as a pendulum and a controller component, activated by the gyroscope and positioned to position the front wheel to maintain the machine in a horizontal position.

The features and implementations of the present invention are described in detail below with reference to the drawings. The description of the embodiments of the invention is merely exemplary and is not intended to limit the invention, and the application or use of the invention.

Please refer to "Figure 1" for a cross-sectional view of the pipe being repaired.

Next, the front of the pipe is the unrepaired part of the pipe, and the back side of the pipe is the part of the pipe to which the composite reinforcement material is applied.

That is, the front portion of the machine of the present invention is the end portion when the machine is moved in the forward direction, and the back of the machine is the opposite end portion. The rate of forward motion is V _F .

According to the invention, the composite reinforcement layer is arranged inside the damaged underground pipe 1 having a radius _Rp . This reinforcing layer consists of a reinforcing strip 3 of fibers, wherein the reinforcing strip 3 is wound along the inner surface 2 of the duct in a helical path.

The reinforcing tape 3 can be unwound from the reinforcing tape cylinder 71, and the reinforcing tape roller 71 is a part of the reinforcing tape supply member 70.

Then, the reinforcing tape 3 is driven by driving and tensioning the drum 72, and supplied to the contact member 40.

The contact member 40 includes a roller 41 which is brought into contact with the contact region 4 by the contact member 40. The reinforcing tape 3 is then pressed by pressing the member 50 in the main pressure region 5. The main pressure zone 5 is spaced apart from the contact zone 4.

Both the contact member 40 and the pressing member 50 are rotated about the rotating shaft 21 at an angular rate ω. The rotation shaft 21 is aligned with the longitudinal rotation axis of the cylindrical pipe 1.

A relative offset of the angle of rotation a may be between the contact member 40 and the pressing member 50, for example, α is 8°.

When supplied to the contact area 4, the operating rate of the reinforcing tape 3 is referred to as V ₁ . When pressure is applied in the main pressure region 5, the operating speed of the reinforcing tape 3 is referred to as V ₂ .

In the present embodiment, the operation rate is the peripheral speed of the drums 41, 51, respectively.

The reinforcing layer of the reinforcing tape 3 is made of a tamper resistant material (the breaking resistance is usually more than 1500 MPa) and is a highly elastic component (usually at 100 to 400 GPa) between). Carbon fibers are generally used here (with a destructive force in the range of 3000 MPa). For example, the reinforcing tape 3 has a width of 600 centimeters (mm) and is composed of carbon fibers in which the carbon fibers are oriented in a chain shape and which have a small proportion of glass fibers and are disposed in the direction of the frame to obtain an adhesion. Braid.

The resin used may have an epoxide group. The resin can be heat set and polymerized at ambient temperature. For example, epoxy resin, a two component of the type mentioned in EP-A-0 799 951.

In the embodiment shown in "Fig. 2", "Fig. 3" and "Fig. 4", the machine of the present invention is attached to the frame, and the frame is connected to the rotating member 30. The rotating member 30 is located at the back end of the machine.

The front end of the machine is provided with a container containing a container 85 containing unpolymerized resin and a container 84 containing a hardener. A pump is used in the rotating member 30 to carry the resin-based hardener, and is supplied to the coating drum 81 through a plurality of tubes 83 as part of the coating member 80.

The coating drum 81 of the coating member 80 has a width larger than that of the reinforcing tape, and is partially disposed in front of the spiral path of the reinforcing tape. Therefore, the contact area 4 is simultaneously applied forward and the previously applied reinforcing tape is applied. Next, the coating drum 81 in the present invention is simultaneously a coating member and an auxiliary pressing member.

The machine is driven by the forward moving member 90 and positioned by the front wheel 94. The stabilizing member 95 is comprised of two pairs of inclined pulleys 96, 98 positioned from each side of the frame and coupled to the arms 97, 99 in an adjustable position and in contact with the inner face 2 of the duct.

Please refer to "Fig. 2". Although the pipe has been removed, the use of the reinforcing tape 3 can still be seen. In this embodiment, the advancement of the reinforcing strip 3 above the winding corresponds to a width of about one third of the reinforcing strip 3 to ensure that there are three times the thickness of the fiber on the surface of the tube. Further, the indentations of the rollers 41, 51 can be seen to form the contact region 4 and the pressing region 5, respectively.

Referring now to "Fig. 3" and "Fig. 4", the rotating member 30 and the forward moving member 90 can be seen in more detail.

The machine is moved forward by the drive wheel 91, wherein the drive wheel 91 is coupled to the motor 93 through a belt 92 (inside the component).

The rotary member 30 is coupled to the motor 22 via the rotary joint 23 via the rotary joint 23. The compressed air, the resin and the hardener can pass through the rotary joint 23.

The motor 22 is connected to a vertical sliding member 25 through the support member 26. The sliding member 25 includes an annular screw and a guiding member. Therefore, it is possible to vertically change the position of the rotating shaft 21 of the rotating member 30 (e.g., the displacement b moves).

The rotating member 30 includes a contact member 40, a pressing member 50, and a coating member 80.

Both the contact member 40 and the pressing member 50 are coupled to the rotating shaft 31 through the arm 60. The arm 60 includes a radially extendable member 61 (extendable as a displacement a) that is operated by a pneumatic jack 62.

The coating member 80 is coupled to the rotating shaft 31 through a radially extendable member 82 (extendable as a displacement c).

The contact member 40 includes a drum 41 that is rotated through the belt 44, the belt 44 is rotated by contacting the pulley 42 of the inner face 2 of the pipe. The belt 44 is embedded in the pulleys 43, 46. One pulley 43 is coupled to the pulley 42 and the other pulley 46 is coupled to the drum 41. The diameter of the pulley 46 is smaller than the diameter of the pulley 43 so that the rotational speed of the drum 41 is higher than the rotational speed of the pulley 42, and constitutes a circumferential rate increasing member 45.

Therefore, it is possible to increase the motion rate V ₁ with respect to the motion rate V ₂ .

The reinforcing tape 3 to be applied can be loosened by the supply member 70, and the reinforcing tape 3 can be driven by the intermediate roller 47 to the drum 41 for use by the supply roller 41.

The supply member 70 can be mounted on the rotating member 30 by the free roller 73, wherein the free roller 73 can be activated by the rotating device 74.

Referring now to "figure 5", there is shown a cross-sectional view of a repaired pipe according to another embodiment of the present invention. This embodiment differs from the resin supply device in "Fig. 1", "Fig. 2", " Embodiments in Figures 3 and 4 are shown.

In the different embodiments, the same reference numerals denote the same parts.

The reinforcing tape 3 is unwound by the reinforcing tape roller 71 and driven by the driving and tensioning roller 72, and is impregnated with resin or a resin containing a matrix by the two dip rollers 86 before being applied to the contact region 4.

The dip rollers 86 are disposed face to face with each other to facilitate pressing on the reinforcing tape 3.

Further, the dip roller 86 may be composed of a foam or sponge material. And each dip roller 86 is surrounded by a casing 87 to provide and retain a resin or a resin containing a matrix. The outer casing 87 may include edges to prevent resin from flowing out of the outer casing 87.

The outer casing 87 is supplied with a conveying member 88. Wherein the conveying member 88 can comprise A plurality of tubes are connected to at least one of the containers to supply the outer casing 87 at a plurality of conveying points, and the resin is evenly distributed on the dip drum 86 and then distributed over the reinforcing tape 3 over the entire body.

Immersing the drum 86 equipped with a motor, and a variable rotation rate to ₁ V as functions at a first operating rate to control the impregnation level of reinforcement tape.

The dip roller 86 is coupled to the expandable arm 60.

In addition to using the dip roller 86 or instead of the roller, a lip gasket or other suitable impregnation method can be used.

According to the embodiment in "figure 5", the coating members 80 in "Fig. 2", "Fig. 3" and "Fig. 4" can be avoided.

It is advantageous to use the coating drum 81 as the second pressing member.

Following this embodiment, the coating drum 81 is no longer supplied with resin, and the tube 83 is eliminated.

Then, the coating drum 81 is used as a finishing member. The coating drum 81 can be associated with a blade or a squeegee to smooth the inner surface of the composite structural reinforcement layer.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

1‧‧‧ pipeline

2‧‧‧ inside the pipe

3‧‧‧ Strengthening belt

4‧‧‧Contact area

5‧‧‧Main pressure zone

21, 31‧‧‧ shaft

22, 93‧‧‧ motor

23‧‧‧Rotary joint

25‧‧‧Sliding members

26‧‧‧Support components

30‧‧‧Rotating parts

40‧‧‧Contact members

41, 51‧‧‧ Roller

42‧‧‧ pulley

43, 46‧‧‧ Pulley

44, 92‧‧‧ belt

45‧‧‧Circle rate increasing component

47‧‧‧Intermediate roller

50‧‧‧Extrusion members

60, 97, 99‧‧‧ arms

61, 82‧‧‧ Radial extendable parts

62‧‧‧Pneumatic jacks

70‧‧‧Supply components

71‧‧‧Enhanced belt roller

72‧‧‧Drive and tension roller

73‧‧‧Free Roller

74‧‧‧Rotating device

80‧‧‧ coated components

81‧‧‧ Coating roller

83‧‧‧ tube body

84, 85‧‧‧ containers

86‧‧‧dipping drum

87‧‧‧Shell

88‧‧‧Transporting members

90‧‧‧ forward moving components

91‧‧‧Drive wheel

94‧‧‧ Front wheel

95‧‧‧Stabilizing components

96, 98‧‧‧ Tilt pulley

V _F ‧‧‧ forward movement rate

a, b, c‧‧‧ displacement

Figure 1 is a schematic cross-sectional view of the repaired pipe of the present invention; Figure 2 is a perspective view of the composite structural reinforcement layer applied to the process of the present invention as viewed from the back of the machine; Figure 3 is a detailed perspective view of the machine component of Figure 2 as viewed from the back; A side view of the machine component in FIG. 3; and FIG. 5 is a schematic cross-sectional view of the repaired pipe according to another embodiment of the present invention.

4‧‧‧Contact area

5‧‧‧Main pressure zone

30‧‧‧Rotating parts

80‧‧‧ coated components

81‧‧‧ Coating roller

83‧‧‧ tube body

84, 85‧‧‧ containers

90‧‧‧ forward moving components

94‧‧‧ Front wheel

98‧‧‧Sloping pulley

99‧‧‧ Arm

V _F ‧‧‧ forward movement rate

Claims (43)

A method for reinforcing an in-line cylindrical pipe by applying a composite structural reinforcement in a pipe by layering at least one reinforcing fiber tape (hereinafter referred to as "strength tape") and a resin or a resin containing a matrix in situ a layer comprising: applying a reinforcing tape to a contact area on an inner surface of the pipe by a contact member; moving the contact member along a spiral path to move the contact region along the spiral path; After the contact member, a main extrusion member is moved along the spiral path to apply pressure to the reinforcing strip in the main pressure region, wherein the main pressure region is separated from the contact region, wherein: at a first operating rate The reinforcing strip is supplied to the contact area of the inner surface of the duct; and the reinforcing strip is pressed against the inner surface of the duct at a second operating rate in the main pressure region, wherein the second operating rate is less than the first operation The rate, and the second rate of operation is at least 90% of the first rate of operation. The method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the reinforcing band is mainly composed of carbon fibers. The method of reinforcing an in-line cylindrical pipe according to claim 1 or 2, wherein the reinforcing tape is a woven fabric, and the woven fabric may be a unidirectional braid. The method of reinforcing an in-line cylindrical pipe according to claim 1 or 2, wherein the fiber of the reinforcing tape is a continuous unidirectional fiber. The method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the reinforcing tape is impregnated with at least one resin or a resin comprising a matrix. The method for reinforcing an in-line cylindrical pipe according to claim 1, wherein the reinforcing layer fiber may have no resin or a resin containing a matrix, and then is impregnated in situ with a resin or a resin containing a matrix to form the reinforcement. band. The method of reinforcing an in-line cylindrical pipe according to claim 1, comprising the steps of: moving a coating member along the spiral path; and advancing the resin in the coating region or the resin containing the substrate to The contact area is applied to the inner surface of the pipe. The method of reinforcing an in-line cylindrical pipe according to claim 1, comprising the steps of: moving a coating member along the spiral path; coating the previously applied reinforcing tape with a resin or a resin containing the matrix; a surface of the pipe in the coating area behind the contact area; and applying pressure to the reinforcing tape through an auxiliary pressing member at the main pressure In the auxiliary pressure area after the force zone. The method of reinforcing an in-line cylindrical pipe according to claim 6, wherein the reinforcing layer fiber is impregnated with a resin or a matrix-containing resin before applying the reinforcing tape to the contact region. The method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the reinforcing layer fiber is impregnated through a drum comprising a resin or a resin comprising a matrix. The method of reinforcing an in-line cylindrical pipe according to any one of claims 6 to 10, wherein the resin or the resin comprising the matrix is mixed by at least one prior to the coating step. It is obtained by polymerizing a resin and a hardener. The method of enhancing an in-line cylindrical pipe according to claim 1, wherein the second operating rate is at least 95% of the first operating rate. The method of enhancing an in-line cylindrical pipe according to claim 12, wherein the second operating rate is 98% to 99% of the first operating rate. A method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the direction of the forward movement rate in the layering process is along the axial direction of the pipe and is driven by the second operating rate. The method for enhancing an in-line cylindrical pipe according to claim 14, wherein the forward movement rate V _F is: V _F = V ₂ * W / ( ₂ Π * R * N) wherein: W is a reinforcing band Width; R the radius of the inner surface of the pipe; the number of reinforcing bands of the N composite structural strengthening layer. A method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the contact member and/or the main extruded member are radially adjustable to maintain contact with the inner face of the pipe. The method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the contact member comprises a roller driven by a pulley, the contact member contacting the pipe before applying the composite structural reinforcement layer Face, and wherein the circumferential speed of the drum increases relative to the circumferential speed of the pulley. A method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the reinforcing tape is released from the drum before contacting the inner face of the pipe. A method of reinforcing an in-line cylindrical pipe according to claim 18, wherein the tension of the reinforced reinforcing tape is adjusted so that the reinforcing tape is unstressed when the reinforcing tape is applied to the contact region. The method of reinforcing an in-line cylindrical pipe according to claim 1, wherein the contact pressure in the contact area and/or the pressure in the main pressure region is adjusted, and the contact pressure and the pressure line are adjusted. The spiral path is kept substantially constant. A machine for reinforcing an in-line cylindrical pipe, comprising a composite structural strengthening layer, the composite structural strengthening layer comprising at least one reinforcing tape, and the reinforcing tape package a reinforcing layer fiber and a resin or a resin comprising a substrate, the machine comprising: a contact member capable of applying the reinforcing tape to the inner surface of the pipe; and a pressing member capable of being applied to the inner surface of the pipe Pressing the reinforcing strip; and moving the member to move the contact member and the pressing member along a helical path; wherein the contact member and the pressing member have an angular offset therebetween, wherein The machine is configured to: supply the reinforcing strip to the contact area of the inner surface of the duct at a first operating rate; and compress the reinforcing strip for the inner surface of the duct at the second operating rate in the main pressure region And wherein the second operating rate is less than the first operating rate, and the second operating rate is at least 90% of the first operating rate. The machine for reinforcing an in-line cylindrical pipe according to claim 21, further comprising a reinforcing tape supply member, wherein the reinforcing tape supply member is a reinforcing tape roller, wherein the reinforcing tape to be applied can be strengthened by the reinforcing tape The belt supply member is loosened. The machine for reinforcing an in-line cylindrical pipe according to claim 22, wherein the rotation speed of the reinforcing belt roller is adjusted by a rotating device, and the rotating device may be a weight or an engine. The machine for reinforcing an in-line cylindrical pipe according to claim 22 or claim 23, wherein the reinforcing tape supply member comprises at least one driving and tensioning roller. The machine for reinforcing an in-line cylindrical pipe according to claim 22 or claim 23, wherein the moving member comprises a rotating member, and a rotating shaft of the rotating member is movable to match a longitudinal axis of the pipe and A forward moving member. A machine for reinforcing the inner surface of an in-line cylindrical pipe according to claim 25, wherein the rotating member comprises a rotating electric motor connected to a vertical sliding member. The machine for reinforcing an in-line cylindrical pipe according to claim 25, wherein the rotating member comprises a rotary joint connected to a rotary electric motor. The machine for reinforcing an in-line cylindrical pipe according to any one of claims 21 to 23, wherein the contact member and the pressing member are part of a single rotating member, and the rotating member comprises a The rotating shaft is connected to a rotating member. The machine for reinforcing an in-line cylindrical pipe according to any one of claims 21 to 23, further comprising a coating member for coating an inner surface of the pipe and connected to the moving member The coating member has an angular offset from the contact member and the pressing member, wherein the coating member is a coating roller. The machine for reinforcing an in-line cylindrical pipe according to claim 29, wherein the coating drum is supplied by a plurality of conveying members, and the conveying members are connected to at least one container, and the conveying members are For a plurality of tubes. A machine for reinforcing an in-line cylindrical pipe according to claim 22 or claim 23, comprising an impregnation device along the path of the reinforcing tape and between the reinforcing tape supply member and the contact member. The machine for reinforcing an in-line cylindrical pipe according to claim 31, wherein the dipping device is located between the driving and tensioning drum and the contact member. A machine for reinforcing an in-line cylindrical pipe according to claim 31, wherein the impregnation device comprises an impregnation drum. The machine for reinforcing an in-line cylindrical pipe according to claim 33, wherein each of the dipping drums is surrounded by a resin or a resin containing a matrix to keep an outer casing supplied by the supply member. The machine for reinforcing an in-line cylindrical pipe according to claim 30, comprising at least two separate containers, wherein the first container is adapted to accommodate unpolymerized resin, and the second container is adapted to receive a hardening And mixing the unpolymerized resin and the hardener in the vicinity of the coating drum or the impregnation device. The machine for reinforcing an in-line cylindrical pipe according to any one of claims 21 to 23, wherein the contact member and/or the pressing member are connected to a rotating shaft through a radially extendable arm . A machine for reinforcing an in-line cylindrical pipe according to claim 36, wherein the radially extendable arm is radially adjustable by operating a pneumatic jack. Enhanced in-line as described in any one of claims 21 to 23 A machine for a cylindrical pipe, wherein the contact member and/or the pressing member comprises a roller and/or a blade and/or a brush. The machine for reinforcing an in-line cylindrical pipe according to claim 38, wherein the contact member comprises a drum and is driven by a pulley and is adapted to contact the inner surface of the pipe, and the pulley is A circumferential rate increasing member is coupled to the drum. The machine for reinforcing an in-line cylindrical pipe according to any one of claims 21 to 23, comprising a forward moving member, the forward moving member comprising a driving wheel adapted to contact the pipe The inner surface and the drive wheel are moved by a motor through a stabilizing member. The machine for reinforcing an in-line cylindrical pipe according to claim 40, wherein the stabilizing member comprises two inclined pulleys located on each side of the driving wheel and contacting an inner surface of the pipe, the pulley is in a An adjustable position is along the arm and is coupled to the arm. The machine for reinforcing an in-line cylindrical pipe according to any one of claims 21 to 23, further comprising a front wheel for positioning the machine when moving forward. A machine for reinforcing an in-line cylindrical pipe according to claim 42 further comprising a gyroscope and a controller component activated by the gyroscope and positioning the front wheel to hold the machine In a horizontal position, wherein the gyro can be a pendulum.