KR20080006224A - Centering device to remove a scale being the inside of pipe using powerless revolution - Google Patents

Abstract

A centering device using powerless revolution is provided to prevent a moving body from being upset by conforming the rotation center of the moving body to the center of a pipe line with a spring and a tracking unit installed to the moving body. A centering device using powerless revolution comprises a moving body(4), a first clamp(6), a traction unit(8), a rotary joint(18), a centering unit(16), and a high pressure fluid injection unit(20). A fluid conveying pipe(2) is coupled to the moving body. The first clamp is configured to clamp the fluid conveying pipe to the moving body securely. The traction unit, which is attached to the outer part of the moving body, slides on the inner surface of a pipe line to move the moving body back and forth. The rotary joint is installed to the outer peripheral surface of the moving body, rotated freely by external force. A fluid passing shaft(18a) is installed to the front end portion of the rotary joint. The centering unit, configured to the moving body, positions the rotation center thereof to the center of the pipe line. The high pressure fluid injection unit, coupled to the fluid passing shaft of the rotary joint, injects high pressure fluid to the inside of the pipe line to remove scales. The high pressure fluid injection unit revolves with counterforce generated when high pressure fluid hits the inside of the pipe line. The centering unit includes a second clamp and a spring. The second clamp is coupled to the moving body, separated from the traction unit by a predetermined interval. The spring is disposed between the second clamp and the traction unit in order to compensate for eccentric errors occurred when the moving body passes through a narrow pipe, a wide pipe, and a curved pipe.

Description

Centering device to remove a scale being the inside of pipe using powerless revolution}

1 is a perspective view showing the configuration of a centering device according to the prior art;

Figure 2 is a block diagram for cleaning the inner surface of the conduit centering device according to longitudinal surgery.

Figure 3 is an exploded perspective view showing an embodiment of a centering device using a non-locking rotation according to the present invention.

Figure 4 is an assembled perspective view of Figure 3;

5 is a front view of a nozzle which is a main part of the present invention;

6 is a cross-sectional view for showing an operating state of the centering device using a non-powered rotation according to the present invention.

7 is a front view showing a state in which the nozzle is rotated by the ejection pressure of the nozzle which is the main part of the present invention.

8 and 9 are a perspective view showing another embodiment of the fluid injection nozzle which is the main part of the present invention, and an operation state thereof.

* Explanation of the codes for the main parts of the drawings

2: fluid transfer pipe 4: moving body

6: first clamp 8: towing means

10: first blocking clamp 12: second blocking clamp

14: 3rd clamp 16: center holding spring

18: rotary joint 20: high pressure fluid injection means

22: base 24: camera head

32, 34: first and second bracket 36: telescopic link

40: wheel 42: connecting support

52: nozzle head 54: fluid spray nozzle

56: Tow Ring 100: Aging Pipeline

The present invention relates to a pipe washing apparatus applied to the unexcavated rehabilitation method of the water and sewage pipes, and more specifically, can be rotated by using the fluid injection pressure without the need for a separate rotational power for rotating the nozzle portion, The present invention relates to a centering device using a non-powered rotation capable of spraying high pressure water while maintaining a center of rotation when passing through a curved pipe by effectively removing the solidified scale layer deposited on the inner surface of the sewage aging pipe passage.

Generally, medium and large diameter water supply pipes and small diameter water supply pipes, pipes for transferring various fluids such as oil and gas, and sewage pipes for transporting sewage are aged and used for a long time after installation. Various foreign substances contained in the fluid such as water, oil, gas, etc. are deposited on the inner wall surface or rust is generated as the inner surface of the pipe is oxidized, and these solidify to form a scale layer.

As described above, since the scale layer generated by the deposition of foreign matter on the inner surface of the fluid pipeline is gradually thickened and solidified with time, there is a problem of hindering the smooth flow of the fluid and lowering the fluid pressure. Since the scale layer is dissolved in the fluid and contaminates the fluid, the pipe should be cleaned periodically.

In addition, the problems caused by the aging of the pipeline not only causes a serious problem in maintaining the function of the water supply and drainage pipe network, but also has a significant result of increasing energy consumption.

Therefore, in order to solve problems such as corrosion products and pipe breakage inside the pipe, improvement work (replacement or rehabilitation) for the old pipe is carried out. Customs (cleaning) and lining are typical for the rehabilitation method applied to the pipeline improvement work. .

In the pipe cleaning method, various methods for removing the scale layer deposited on the inner surface of a fluid pipe have been proposed and used.

The customs method includes a method in which a scraper method for dredging the sediment by dragging the device and a water jet method using high pressure water are rushed, and the polypig is rushed by high pressure. Poly pigs (Poly pigs) method for removing the scale layer of the has been developed, these methods are generally carried out as a pre-treatment of pipe lining (Pipe lining).

Among the proposed customs methods, the method using the scraper and the water jet has a problem that the customs work is cumbersome and takes a long time because the customs are performed through the repeated scraper and the water jet work several times. In addition, the method is limited to the diameter that the scraper can accommodate the cleaning of the pipe, there is a problem that is not suitable for the tubing of large diameter pipelines of 700mm or more.

In particular, the solidified scale layer due to prolonged deposition on the inner wall surface of the pipeline, that is, the solidified scale layer which cannot be removed even by scraper or the mortar that has been hardened by the construction site, or the poorly constructed concrete connector, cannot be removed by the above method. In addition, obstacles such as scale layers, mortars, etc. present in the pipeline restrict the movement of the scraper and the waterjet device itself, which causes difficulties in continuing dredging.

The polypig method, which is widely used as a mechanism for removing scale while transferring to the fluid pressure in a pipeline, is effective for removing the scale layer in the pipe because the polypig moves forward in a spiral direction due to the propulsion of the fluid pressure. Is suitable for small pipes, and includes a problem that cannot be applied to a method for removing a scale layer stuck to a large diameter pipe of 700 mm or more.

In addition to the customs method as described above, there is disclosed a customs device using a non-powered rotation that is towed while rotating with no power by varying the angle of the high-pressure water jet nozzle, briefly described with reference to Figures 1 and 2 as follows.

As shown in the figure, the moving body 200 is provided with a fluid transfer pipe of a predetermined length for transporting the high pressure fluid from the outside to move in the aging pipeline 100; It is installed in front of the fluid transfer pipe of the mobile body 200 to eject the high-pressure water spray nozzle 300 for removing the scale layer grown on the inner surface of the pipeline 100 and the traction device for towing the mobile body 200 It consists of 400.

In the case of the customs device using the non-powered rotation, for example, when the diameter of the pipe is reduced, for example, the diameter of the pipe is reduced from 900 mm to 850 mm, or when it passes through a curved pipe having a predetermined radius of curvature, the moving body of the customs device and the center of the pipe do not coincide. (t) is generated, wherein when the eccentric error interval between each nozzle tip and the pipe surface is different by t1> t2 in the drawing, the blow pressure applied to the pipe surface according to the different eccentric error between the pipe surface and the nozzle tip This is different from each other there is a problem that the rotation of the nozzle is not smooth. Such a problem may cause a breakdown by acting as a cause of twisting the support that supports the moving wheels, and the mobile body 100 may be overturned, thereby causing a problem that customs work cannot be performed. In addition, when the eccentricity error (t) is too large, a case that hits the pipe surface of the nozzle tip also occurs, in this case, because the nozzle tip does not hit the pipe surface can not be rotated itself, the actual customs work can be There is no other problem.

Accordingly, the present invention has been proposed to solve the above problems, the high pressure fluid ejected from the nozzle portion without the need for a separate rotational power by using the repulsive force when hitting the inner surface of the pipeline while the nozzle unit rotates It is an object of the present invention to provide a centering device using a non-powered rotation that can remove the inner scale layer.

In addition, the present invention is to maintain the center of rotation in accordance with the center coincidence between the moving body and the old pipe line even when passing through the pipe having a change in diameter, such as curved pipe having a predetermined radius of curvature or diameter reduction or tube diameter enlargement in the ejection of high pressure fluid Another object of the present invention is to provide a centering device using a non-powered rotation capable of preventing the mobile body from overturning.

In addition, the present invention is to remove the scale layer attached to the inner surface of the pipe by ejecting a high pressure fluid from the nozzle portion that rotates while the moving body is rotating, it is possible to perform the washing operation continuously without being restricted by the mobile phase by the scale layer In addition, another object of the present invention is to provide a centering device using a non-powered rotation capable of performing a drying operation in the process of pulling the moving body forward of the pipeline.

The present invention in order to achieve the above object, the mobile body for holding the fluid transfer pipe for transporting the high pressure fluid from the outside; First clamping means for firmly fixing the fluid transfer pipe in the moving body; One end is fixed to the outer surface of the mobile body at a predetermined angle, the other end is in contact with the inner surface of the traction means to pull the mobile body in the forward and backward direction by rolling operation; A rotary joint installed on an outer circumferential surface of the mobile body and freely rotating by external force, the rotary joint having a fluid passage shaft at a distal end thereof; Center holding means for maintaining the center of rotation is installed in the moving body to be located in the center of the pipeline; And a high pressure fluid coupled to the fluid passage shaft of the rotary joint to blow through the inner surface of the pipe to remove the scale layer by the blow pressure, and to rotate by the repulsive force when the blown high pressure fluid hits the inner surface of the pipe. It provides a centering device using a non-powered rotation including a high pressure fluid injection means.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 3 to 9.

In the centering device using the non-powered rotation according to the present invention, the pipeline section is reduced or expanded while simultaneously removing the scale layer grown on the pipeline surface by rotating the nozzle portion by the repulsive force when the high pressure fluid ejected from the nozzle strikes the pipeline surface. By offsetting the eccentric error generated when passing through the curved pipe and so that the center of the moving body is always positioned at the center of the pipeline.

Figure 3 is an exploded perspective view showing an embodiment of a centering device using a non-locking rotation according to the present invention, Figure 4 shows an assembled perspective view of Figure 3, respectively.

In the embodiment of the present invention, as shown in the figure, a fluid conveying tube 2 of a predetermined length for conveying a high pressure fluid from the outside; A moving body 4 formed of a hollow shape to support the fluid transfer pipe 2 and having a threaded thread on its outer surface, and having first and second fastening portions 4a and 4b formed at both ends thereof; First clamps 6 which are fastened to the first and second fastening portions 4a and 4b of the mobile body 4, respectively, to prevent the fluid transfer pipe 2 from being tightened on the inner surface of the mobile body 4 to prevent the first body from being separated. )Wow; One end is fixed to the outer surface of the mobile body 4 at a predetermined angle, the other end is in contact with the inner surface of the aging pipe 100 by rolling operation to pull the mobile body 4 in the front and rear direction and ; First and second blocking clamps (10, 12) positioned at both ends of one end of the towing means (8) and for limiting the stretching range of the towing means (8); A third clamp 14 installed at the moving body 4 at a predetermined distance from the first blocking clamp 10; Is installed between the first and third blocking clamps (10, 14), the moving body by offsetting the eccentric error generated when passing through the reduced diameter or expanded pipe or curved pipe in accordance with the movement of the towing means (8) (4) a center holding spring (16) for matching the center between the aging pipe (100); A rotary joint (18) installed on an outer circumferential surface of the fluid transfer pipe (2) and freely rotating by external force, and having a fluid passage shaft (18a) at its distal end; The high pressure fluid which is coupled to the fluid passage shaft 18a of the rotary joint 18 and passes therethrough is ejected to the inner surface of the aging pipe 100 to remove the scale layer by the impact pressure, and the ejected high pressure fluid is a pipe ( 100, the high-pressure fluid injection means for rotating by the repulsive force when hitting the inner surface; A pedestal 22 provided on an outer surface of a central portion side of the mobile body 4; It is installed on the pedestal 22, and provided with a flash and CCTV, the pipeline 100 includes a camera head 24 to shoot to secure the situation data of the scale layer grown on the inner surface of the pipeline 100.

Here, the first and second fastening portions 4a and 4b of the movable body 4 are formed with cutout portions 4c cut in a lengthwise direction by a predetermined length so that fluid is released by the fastening force of the first clamp 6. The pipe can be tightened firmly in the mobile body (4). In addition, in the present embodiment, two first clamps 6 are provided to provide a firm tightening force.

The towing means 8 is fastened to the moving body 4 at a predetermined interval, and the first and second brackets 32 and 34 in which the support feet 32a and 34a extend radially at intervals of 120 °. ; One end is fixed to the support feet (32a, 34a) of the first and second brackets (32, 34), the other end is positioned to cross, the elastic link 36 is stretched around the intersection point when the external force is applied Wow; A wheel 40 installed at the other end of the stretchable link 36 and 360 ° rolling in contact with the inner surface of the old pipeline 100; And a connection support 42 for connecting the wheels 40 on both sides.

In the present embodiment, the wheel 40 is made of wheels in the form of a disc, but is not limited thereto, it is well known that it can be made of a ball type that can rotate 360 °.

The high pressure fluid injection means 20 is fastened to the fluid passage shaft 18a of the rotary joint 18, and has a space for temporarily storing a high pressure fluid therein, and at least two radially penetrated from the space. A nozzle head 52 in which the above fluid passage is formed; It is coupled to each fluid passage of the nozzle head 52, and the fluid injection nozzle 54 and the nozzle head 52 having a nozzle tip is formed at the end of the line so that the ejection direction of the fluid has a spiral shape It includes a traction ring 56 provided to be towed by the winch, etc. on the front end surface.

In the present exemplary embodiment, four fluid spray nozzles installed in the nozzle head 52 are provided at four intervals of 90 °, but the present invention is not limited thereto. As shown in FIGS. 8 and 9, the nozzle head ( It is also possible to have a configuration in which the fluid injection nozzle in the form of a lattice is provided with a center of gravity and an eccentricity of 52). That is, as shown in the figure, the fluid passage is formed symmetrically on both sides of the nozzle head 52, the fluid passage is located eccentrically up, down, left, right to the center line by a predetermined distance (t). .

The fluid spray nozzle 54 coupled to the fluid passage of the nozzle head 52 has a curved shape in a lattice shape, and is arranged to be twisted in opposite directions by a predetermined angle (45 ° in the present invention). Therefore, as shown in FIG. 9, the high pressure fluid ejected from the fluid spray nozzle 54 strikes the pipe face at an angle, and the nozzle head 52 rotates without any power by the repulsive force caused by the hit. Will be.

The operating state of the centering device using the non-powered rotation according to the present invention configured as described above will be described in detail.

First, when the high pressure fluid is sand, sand is supplied from a sanding kit installed outside the pipeline, and in the case of high pressure water, the sand is supplied from a waterjet pump. In addition, the moving body 4 is inserted into the pipeline, the rope is connected to the towing ring of the nozzle head 52, and is installed at the center of the moving body 4 while pulling to the front side of the pipeline via a winch or the like. The front of the conduit 100 is irradiated by the camera head 24.

When the high pressure water is supplied to the fluid transfer pipe 2 while towing the moving body 4 from the front portion to the rear portion of the pipeline 100, the fluid passes through the fluid passage shaft 18a of the rotary joint 18 and the nozzle head. Discharge into the fluid passage via the space portion 52. The fluid is ejected toward the conduit surface from the nozzle tip 54a of the fluid spray nozzle 54 connected to the fluid passage.

At this time, as indicated by the arrow in Fig. 5, the high pressure fluid ejected from the nozzle tip (54a) by the staggered shape is hitting the inner curved surface of the pipe at an angle. At this time, the repulsive force generated when striking the conduit surface acts on the fluid spray nozzle 54 to generate a force that tries to rotate in a direction opposite to the ejecting direction of the high pressure fluid. The force to rotate of the fluid injection nozzle 54 is transmitted to the rotary joint 18 together with the nozzle head 52, and eventually the nozzle head 52 and the rotary joint together with the rotation of the fluid injection nozzle 54. (18) is to rotate without power.

As such, the fluid spray nozzle 54 rotates to remove the scale layer grown on the conduit surface, and the wheel 40 of the traction device 8 moves while rolling on the conduit surface.

Since the vibration generated when the scale layer of the conduit surface is removed through the high pressure fluid ejected from the fluid spray nozzle 52 is absorbed by the expansion link 36 and the spring 16 buffered, the wheel 40 ) Can make a smooth cloud movement.

On the other hand, when the moving body 4 moves along the conduit surface by the towing means 8, the center of the moving body 4 from the center of the conduit when passing through the section of the reduced diameter, or the extended section You get out. At this time, the spring 16 is extended or reduced by an eccentric error between the center of the moving body 4 and the center of the conduit 100 to match the center of the moving body 4 with the center of the conduit 100. That is, when the moving body 4 passes the section in which the diameter of the conduit 100 is reduced, the wheel 40 of the towing means 8 installed on the moving body 4 is reduced in the original diameter. It is pressed by the difference of the diameter, and thus the expansion link 36 is pressed to open the first and second brackets (32, 34) finely. An eccentric error occurs between the center of rotation of the moving body 4 and the center of the conduit by the gap between the first and second brackets 32 34. This eccentric error is offset by the spring 16 is compressed so that the center of rotation and the center of the conduit coincides with the moving body 4, as shown in Figure 7 the inner surface of the conduit 100 and the nozzle tip 54 ), The intervals t1, t2, t3, t4 are all the same. Similarly, the interval between the first and second brackets 32 and 34 is reduced by the tensile force of the spring 16 in the section in which the diameter of the pipe is expanded, and the rotation center and the pipe 100 of the moving body 4 are reduced. This offsets the eccentricity error between the centers.

Similarly, even when the moving body 4 passes through the curved tube, the elastic link is telescopically moved at a constant rate by the elastic movement of the spring by the radius of curvature so that the center of the moving body 4 and the curved tube coincide.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, the traction device is mounted on the moving body so that the inner surface of the pipe can be pulled out, but the angle of the nozzle tip is staggered, or the fluid spray nozzle installed in the nozzle head is centered on the center line. The nozzle head can be rotated without the need for a separate motor rotational power by the repulsive force of the high pressure fluid hitting the pipe surface by discharging the high pressure fluid after positioning it at an angle and twisting it at an angle. It has the effect that the customs work can be done simply and cleanly.

In addition, the present invention is to reduce or expand the diameter, the eccentric error generated when the moving body passes through the curved pipe having a predetermined radius of curvature, the traction means is stretched together with the expansion and contraction of the spring installed on the moving body to reduce the eccentric error By offsetting, the center of rotation of the moving body and the center of the pipeline can always be matched. Accordingly, there is another effect that can prevent the moving body from being unstable or overturned by the ejection pressure of the high pressure fluid.

Claims (7)

A mobile main body for sandwiching and supporting the fluid transfer pipe for transporting the high pressure fluid from the outside; First clamping means for firmly fixing the fluid transfer pipe in the moving body; One end is fixed to the outer surface of the mobile body at a predetermined angle, the other end is in contact with the inner surface of the traction means to pull the mobile body in the forward and backward direction by rolling operation; A rotary joint installed on an outer circumferential surface of the mobile body and freely rotating by external force, the rotary joint having a fluid passage shaft at a distal end thereof; Center holding means for maintaining the center of rotation is installed in the moving body to be located in the center of the pipeline; And The high pressure fluid coupled to the fluid passage shaft of the rotary joint passes through the inner surface of the conduit to remove the scale layer by the impact pressure, and the high pressure fluid is rotated by the repulsive force when the ejected high pressure fluid strikes the inner surface of the conduit. High Pressure Fluid Injection Means Centering device using a non-powered rotation comprising a. The method of claim 1, And a camera head mounted on an outer circumferential surface of the mobile body and photographing to secure situation data of the scale layer grown on the inner surface of the pipeline. The method according to claim 1 or 2, The first clamping means First and second fastening portions formed on both end sides of the moving body and having cutouts cut in a length direction by a predetermined length; And A centering device using a non-powered rotation comprising a clamp for firmly fixing the fluid transfer pipe inside the mobile body by tightening it coupled to the first and second fastening portion of the mobile body. The method according to claim 1 or 2, The towing means First and second brackets fastened at predetermined intervals on the moving body and provided with support feet at a predetermined isometric angle on a circumferential surface thereof; One end is mounted to the support feet of the first and second brackets, the other end is positioned to cross, the elastic link is stretched around the intersection point; And Wheels installed on the other end of the expansion link, and rolling on the inner surface of the pipeline link Centering device using a non-powered rotation, characterized in that it comprises a. The method of claim 1, The center holding means is Second clamping means fastened to the moving body at a predetermined distance from the towing means; And It is installed between the second clamping means and the towing means, and the expansion and contraction according to the movement of the towing means to offset the eccentricity generated when passing through the reduced or expanded pipe or curved pipe to match the center of the moving body and the old pipe line Springs for Centering device using a non-powered rotation, characterized in that it comprises a. The method according to claim 1 or 2, The high pressure fluid injection means A nozzle head which is coupled to the fluid passage shaft of the rotary joint and has a space for temporarily storing the high pressure fluid therein and has at least two fluid passages radially penetrated from the space; And Fluid injection nozzles having nozzle tips coupled to the respective fluid passages of the nozzle head, each having an ejection direction formed at an end in an oblique manner at a distal end such that the fluid strikes the inner surface of the conduit at an oblique angle. Centering device using a non-powered rotation comprising a. The method of claim 6, The fluid passage of the nozzle head is formed symmetrically on both sides, is located eccentrically by a predetermined distance (t) in the up and down or left and right with respect to the center line, Fluid injection means is installed in the fluid passages on both sides of the nozzle head is bent in a grid shape centering device using a non-powered rotation, characterized in that located in a direction opposite to each other by a predetermined angle.

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