KR101131472B1 - Grinding apparatus for removing scale on the inner surface of the superannuated water supply pipe - Google Patents

Abstract

PURPOSE: A device for grinding the inside of an old pipeline is provided to efficiently remove solid scales growing on the inner surface of a pipeline or a coated layer of the surface of the pipeline since a grind tip rotates making tight contact with the surface of the pipeline. CONSTITUTION: A device(300) for grinding the inside of an old pipeline comprises a support body(2), a bracket(8), moving units, a central shaft member, and a grinding unit. The bracket is installed perpendicularly from the bottom of the support body. The moving units are installed on both sides of the support body. The moving units make contact with the inner surface of a pipeline(100) and move back and forth. The central shaft member is located in the direction of a transversal axis to be supported by the bracket and be matched the central part of the pipeline. The grinding unit is extended in a radial direction from the leading end of the central shaft member.

Description

Grinding apparatus for removing scale on the inner surface of the superannuated water supply pipe}

The present invention is applied to the non-excavation rehabilitation method of tap water, and relates to an apparatus for polishing the inner surface of the old pipe which is carried out as a pretreatment operation for the regeneration of the aging water pipe, more specifically, the center radius is deformed by earth pressure as well as the garden pipe. Solidity scale grown on the inner surface of the pipeline by rotating and driving the grind tip in close contact with the gap without any gap between the center of the pipeline and the center of the customs center when the non-garden pipeline or curved pipe is changed. Alternatively, the present invention relates to an inner surface polishing apparatus for an aging tube for forming a uniform surface scratch while efficiently removing the coating layer on the surface of the pipeline so that the coating material can be firmly attached during the painting operation.

In general, cast iron pipes, which are mainly used in medium and large diameter water pipes for supplying tap water, oil pipes for transferring various fluids such as oil, gas pipes, and sewer pipes for transferring sewage (hereinafter, collectively referred to as 'pipe lines'). And the steel pipe is coated with coal tar enamel to prevent corrosion, but these pipes are aging with prolonged use, the coating layer is peeled off causing corrosion, and foreign matters accumulate on the inner wall surface of the pipe to create a solid scale layer. .

The coating layer of the conduit is peeled off and corroded, or the scale layer attached to the conduit melts in the fluid, causing contamination of the fluid. In addition, the scale layer generated on the inner surface of the pipeline not only impedes the smooth flow of the fluid, thereby lowering the transport capacity of the fluid, but also causes an unsanitary problem in the case of the water pipe, which causes a great problem in maintaining the function of the pipeline network. This, of course, has significant consequences for increased energy consumption, which means that the pipelines need to be cleaned periodically and the old pipelines need to be replaced with new ones or repaired in a timely manner.

If corrosion products are deepened on the inner surface of the pipe or the pipe is likely to be damaged due to aging, improvement of the old pipe (replacement or rehabilitation) is carried out. Non-excavation customs (cleaning) and linings are mainly applied.

A conventional method for regenerating an old pipeline will be briefly described with reference to FIG.

As shown in the figure, a first step (S1) for inspecting the inside of the pipeline; After cutting off the cut after cutting the length of the old pipe about 60 ~ 80m in one section, the customs equipment such as scraper, wire brush, high-pressure water cleaner, etc. are repeatedly drawn with the power winch several times. A second step (S2) of removing the attached scale and discharging it out of the pipe; A third step (S3) of removing the water accumulated in the tube and transferring the air into the tube by a blower to dry the blower; A fourth step (S4) of performing lining by inserting a hose having an injection head into the tube when the surface inside the tube is dried and spraying epoxy resin paint or polyurea onto the inner surface of the tube through the spray head; And when the epoxy paint or polyurea is completely cured, the fifth step (S5) of cleaning the inside of the pipe, connecting the pipe incisions and passing through them, filling the soil according to the regulations, and completing the rehabilitation work.

As a method for removing the scale of the old pipe in the customs method, a method in which a scraper method for dredging the sewage by dragging the device and a water jet method using high pressure water, an air send (air sand) methods have been developed, and these methods are generally carried out as a pretreatment of pipe lining.

The conventional customs method has a problem in that customs work is cumbersome, customs take a long time, customs state is not constant, thereby failing to achieve a perfect painting work.

In addition, a blasting machine has been proposed that is used for the purpose of removing the scale in the pipe. The blasting machine is, for example, a device for performing a peeling or peeling off of the coating to newly paint the exterior surface of the construction structure, the railway vehicle, the vessel. The blasting machine discharges blast materials, such as grit, iron pieces, shots, silica sand, slag powder, garnet sand, etc. together with compressed air to clean the scales grown in flat foreign substances or pipes. It is mainly used for pretreatment work to be able to perform the painting work on the surface of the structure after removal. In recent years, in rehabilitation of unexcavated aging pipes, solid scales have been removed, and fine scales have been polished and then used as a pretreatment for coating.

As a blasting machine according to the prior art for customizing old pipes, a product released by Air Blast ( www.airblast.com) has been proposed. 2, the main body frame 102 is provided with a wheel 104 for traveling the pipeline 100; A first motor (106) for providing a driving force to the wheel (104); A center stand 108 mounted upright on the main body frame 102 to adjust a center of the center; A rotary head (110) installed on the center stand (108) in a transverse direction and positioned at the center of the conduit and having a hose connector (112) for supplying a blast material to a rear end thereof; A rotary head rotating device 114 including a driving motor and a rotating belt for rotating the rotary head 110; It is installed on the front end of the rotary head 110 via the T-connector 115, and includes a blast nozzle 116 to perform the polishing of the pipeline by ejecting the abrasive in the radial direction of the pipeline while rotating.

On the other hand, the structure which can collect | recover a blast material in the conventional air blast machine is proposed by the clamco.co of the Netherlands. It has a tubular blast body 202 for feeding the abrasive as shown in FIG. A supply nozzle 204 installed at a lower end of the blast body 202 to supply a blast material; A nozzle holder 206 mounted on an upper end of the blast body 202; A brush 208 installed around the supply nozzle 204 to prevent separation of the blast material; One end is branched upward from the outer surface of the blast body 202, the other end has a double pipe structure located outside the supply nozzle 204 to recover the blast material ejected from the supply nozzle 204 (208); And a handle 210 installed on the blast body 202.

The air blast machine having the above-described configuration is ejected directly downward to perform polishing and recover the blast material by the suction force provided to the recovery pipe 208 from the outside. The air blasting machine is a structure in which the worker manually grinds and has not been applied to the pipeline, and a double pipe in which a recovery pipe 208 is installed outside the supply nozzle 204 connected to the blast body 202. It is composed of a furnace, there was a problem that the recovery rate of the blast material after being ejected to the pipe surface is not good.

Conventional blasting machines presented above are essential to the blasting material to remove the scale of the duct face, but since the scale detached from the duct face is collected in a mixed state in the blast material, as a post-work to reuse the blast material There is a need for a process for separating the blast material and the scale, there is a problem that the recovery rate of the blast material is poor in the blast material separation process. In addition, the blasting apparatus of the above-described structure has a structure in which the nozzle bar is not stretched, whereas in the underground pipe line, since there are many deformed pipes such as elliptical or crushed pipes instead of the garden, a uniform customs plane There is a problem that is difficult to obtain. That is, the conventional blasting machine is difficult to pass through the deformation pipe because the nozzle bar is not stretched, and even though the nozzle bar passes through the deformation pipe, the blast material sprayed through the nozzle bar is different, and thus it is impossible to implement uniform polishing. There is a problem.

In addition, since the introduced air (air) supplied from the compressor is constant so as to strike the blasting material on the pipe surface, the air (air) amount and the air (air) pressure may be increased if it is longer than a predetermined distance (typically 30 to 70 m). In addition, the air introduced from the compressor is increased, and even if a large amount of blast material is supplied, the blast materials do not collide with each other to be efficiently polished or grounded, and a large amount of blast material is consumed. have.

Conventional blasting machines require a blasting material to polish the surface of the workpiece, a compressor and a feeding tank for pressurizing the blasting material, a cyclone dust collector for recovering the abrasive, a separator for separating the blasting material and scale, etc. Since it must be provided, there is another problem that the configuration is complicated.

Therefore, the present invention has been proposed to solve the above problems, a plurality of grind tips without the need for a separate blast material, and an air compressor, a pressure tank, etc. for ejecting the blast material to the surface of the workpiece It is an object of the present invention to provide a polishing apparatus for the inner surface of an old pipe that can rotate and revolve so as to efficiently perform surface polishing of the surface of the pipe.

In addition, the present invention can be entered into the pipeline in an independent way, the tubular body is controlled to move left and right and tilting forward and backward (tilting), the expansion and contraction is equipped with a grind tip in accordance with the pipe diameter change of the pipeline When the arm is stretched, it provides not only the garden pipeline but also the non-garden deformed pipe or the aged pipe furnace internal polishing device that can maintain the center of the pipeline and the center of the tubular body when passing through a curved pipe having a predetermined radius of curvature. Has a different purpose.

In addition, the present invention is in close contact with the grind tip to form a perpendicular to the pipeline surface, by narrowly forming the width of the grind tip to be as close as possible to the curved surface can improve the surface polishing efficiency in a small diameter as well as large diameter, Another object of the present invention is to provide a polishing apparatus for the inner surface of an old pipe to uniformly form a scratch on the surface of the workpiece so that the coating material according to the subsequent painting process can be firmly attached to a uniform thickness.

The present invention, the support body to achieve the above object; A bracket installed upright from the bottom surface of the support body; Moving means installed on both sides of the support body and traveling in forward and backward directions in contact with an inner surface of a pipe; A central shaft member supported by the bracket and positioned in the horizontal axis direction to match the center of the pipeline; And a grinding means extending radially from the tip of the central shaft member, the grinding means being in close contact with the surface of the pipeline and rotating and rotating to remove the scale generated on the surface of the pipeline and to form a scratch on the surface of the pipeline. To provide.

Here, the grinding means extends in the radial direction of the central shaft member, the tip is in contact with the pipe surface, the expansion and contraction movement of the rolling arm in accordance with the change in diameter; A lower bracket mounted to the tip of the expansion arm; A grinder installed at the lower end of the lower bracket to be in close contact with the pipe surface to remove the scale of the pipe surface; And a hinge shaft protruding from both front and rear surfaces, a groove formed vertically on both sides of the upper and lower surfaces, and a plate spring accommodated in the groove, respectively, to correct the gap so that the grinder is in close contact with the pipe surface. It includes a first and second gap correction mechanism, characterized in that the first and second gap correction mechanism is arranged in a position intersecting with each other.

The grinder is fixed to the lower end of the lower bracket by bolts, the fixing member having an inclined surface to cross the front and rear sides; A buffer plate which is fixed to an inclined surface of the fixing member and which is buffered in correspondence with the forward direction of the expansion arm; A sink mounted on one bottom surface of the buffer plate; And a grind tip fixed to the sink and arranged in an X shape.

The central shaft member is supported on the bracket and positioned in the horizontal axis direction to match the center of the pipeline and having an outer central shaft having a first hollow portion; And an inner central shaft penetrating through the first hollow portion of the outer central shaft and having a second hollow portion.

In addition, the present invention is installed on the support body, the horizontal rotation means for rotating the outer center axis in the left and right directions so that the center of the outer center axis coincides with the curvature center; Tilting means supported by the bracket for tilting an external central axis in a vertical direction; And a rotation driving means positioned at a rear end of the outer central shaft and driving to rotate the inner central shaft.

As described above, according to the features of the present invention, the following effects are obtained.

First, the grind tip mounted on the telescopic arm is in close contact with each other at right angles to the conduit surface. It can be removed and removed efficiently.

Second, the width of the grind tip attached to the tip of the telescopic arm is narrowly formed so as to be as close as possible to the curved surface, thereby improving the surface polishing efficiency even in the small diameter, and in the subsequent coating process by forming a scratch on the surface of the workpiece uniformly. The film can be firmly formed on the workpiece (inside of the pipe).

Third, the conventional blasting apparatus scales by blasting a blast material such as shots such as grit, iron pieces, silica sand, slag powder, garnet sand, etc. on the surface of a pipe line or the surface of a workpiece such as a metal plate. Although the surface scratches were formed for the post-coating process, the present invention allows the grind tip attached to the extension arm to rotate and revolve, thereby simultaneously removing the scale of the curved surface and simultaneously processing the surface scratches. Not only ash is required, but also a configuration such as an air compressor, a pressure tank, and a blast material separator for ejecting the blast material onto the surface of the workpiece is not required.

Fourth, it is possible to move the external central axis of the support body to the left and right by tilting remotely and to tilt the front and rear direction. In the deformed pipe section or curved pipe section such as a crushed pipe, the extension arm in contact with the pipe surface can be passed smoothly while stretching. In particular, even if the customs device is not bent, the eccentricity of the pipeline surface and the external central axis can be offset through the horizontal rotating device and the tilting device, so that the curvature radius of the pipe can pass smoothly.

Fifth, the horizontal drive device, the tilting device, the rotary drive device of the customs device according to the present invention can be driven by remote control, and the caterpillar can be driven in an unmanned power to perform a customs process. .

Sixth, since the center of the pipe line and the center of the customs device according to the present invention moves in the same state, during the coating process performed in a subsequent process after the customs process is completed, the lining coating work by mounting only the sprayer nozzle on the expansion arm It can carry out by combining, and in this case, the film of uniform thickness can be ensured also at the time of a coating process.

1 is a flow chart showing a series of processes of a general aged pipeline regeneration process,
2 and 3 is an exemplary view of an air blaster according to the prior art,
Figure 4 is a perspective view showing the configuration of one embodiment of the old pipe inner surface polishing apparatus according to the present invention,
5a and 5b is a front view and a right side view of the old pipe inner surface polishing apparatus according to the present invention,
Figure 6 is a perspective view showing a horizontal direction switching device of the support body which is the main part of the present invention,
7 is a cross-sectional view of the horizontal direction switching apparatus shown in FIG.
8 is a cross-sectional view showing the configuration of a tilting drive device which is the main part of the present invention;
9 is a cross-sectional view showing the configuration of an extension arm that is a main part of the present invention;
10 is a perspective view showing the structure of an abrasive block as an essential part of the present invention;
11A and 11B are front and side cross-sectional views of the abrasive block shown in FIG. 10;
12 is a perspective view showing the structure of a grinder which is the main part of the present invention;
Figure 13 is a cross-sectional view showing a rotation drive device of the present invention.

The above-mentioned objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The old pipe inner surface polishing apparatus according to the present invention allows a plurality of grind tips to rotate and revolve so as to efficiently remove the scale present on the surface of the pipeline and to form uniform scratches so that the film can be firmly attached during subsequent painting work. In addition, by driving the customs main body to the left and right rotation and tilt in the vertical direction by the remote control is implemented so that it can pass through the flexible movement in the change of the diameter.

Figure 4 is a perspective view showing an embodiment configuration of the old pipe inner surface polishing apparatus according to the present invention, Figures 5a and 5b is a front view and a right side view of the old pipe inner surface polishing apparatus according to the present invention.

As shown in the figure, the present invention is largely divided into the main body 100, the horizontal direction switching and tilting driving device 200 and the polishing device 300.

First, the main body 100 has a support body (2) having a shape in which both sides of the flat plate is bent upward in the 120 ° direction; Caterpillar (4) is installed on the bottom surface of the both bent portion of the support body (2), for moving the support body (2) independently while traveling in the forward and backward directions in contact with the inner surface of the pipe; A first reduction motor (6) for providing a driving force to the caterpillar (4); It includes a bracket (8) installed upright from the bottom surface of the support body (2).

The horizontal direction shifting and tilting driving device 200 is supported by a bracket (8) is located in the horizontal axis direction to match the center of the conduit and the outer central shaft (10) having a first hollow; A horizontal rotating device 12 installed at a lower end of the supporting body 2 to rotate the external central shaft 10 in left and right directions when the curved pipe passes; A tilting device (14) supported by the bracket (8) for tilting the external central shaft (10) in the vertical direction; And an inner central shaft 16 penetrating the first hollow portion of the outer central shaft 10 and having a second hollow portion.

The polishing apparatus 300 includes an expansion arm 18 extending radially from a circumferential surface of the inner central shaft 16 and having a tip contacting the surface of the pipe and rotating while being stretched according to a change in diameter; A rotary drive device 20 positioned at a rear end of the outer central shaft 10 and driving to rotate the inner central shaft 16; A polishing block 22 mounted at the tip of the expansion arm 18 to be in close contact with the pipeline surface to remove scale layers of the pipeline surface while rotating and revolving, and to polish the scratches on the pipeline surface; And a dust collector 24 for collecting the scale removed through the driving of the polishing block 22 through the inner center shaft 16.

Here, the dust collector 24 is connected to the rear end of the dust suction suction hose 26 and the inner central shaft 16 extending radially from the center of the stretching arm 18 (not shown) to provide a dust collection force (not shown) ). In addition, the polishing block 22 further includes a collecting box for collecting the scale detached from the conduit surface, but the collecting box is not shown in the present invention.

In the embodiment of the present invention, the horizontal rotating device 12 is installed on the bottom surface of the support body 2, as shown in Figure 7, the spur gear 32 for rotating the external central shaft 10 in the left and right directions Wow; It includes a power transmission gear 33 is meshed with the spur gear 32 and a second reduction motor 34 for providing a rotational force to the power transmission gear 33.

As shown in FIG. 8, the tilting device 14 includes: a suspension member 36 fitted to the outer central shaft 10; A third reduction motor (37) supported and supported by the support panel (9) installed on the bracket (8) and forward and reverse rotation; A first driven gear 39 which receives the rotational force of the third reduction motor 37 through a first driving gear 38; It consists of a coupling structure of the left screw shaft 42 and the right screw shaft 43 in the nut shaft 41 is mounted between the suspension member 36 and the bracket 8, in the center of the first driven gear 39 It includes a turnbuckle (40) for raising and lowering the outer center shaft 10 in the front and rear direction by the operation of pushing and pulling the suspension member 36 while being fitted and opened and narrowed according to the forward and reverse rotation of the first driven gear (39). .

Through the driving of the horizontal rotating device 12 and the tilting device 14, when the customs device of the present invention passes through the curved tube, the center of the outer center shaft 10 coincides with the center of the curved tube, and also the change in the diameter of the tube The stretchable arm 18, which can be twisted, can pass while maintaining a right angle with the pipeline surface.

The expansion arm 18 is installed in the first four cylinders 46 and the first cylinder 46 extending radially from the circumferential surface of the inner central shaft 16, as shown in FIG. It provides a pressure of the state, and includes a piston rod 48 that is buffered up and down in the first cylinder 46 in accordance with the pressing to the pipe surface side.

In the present invention, the expansion arm 18 takes the same structure as the shock absorber. Therefore, the structure of the expansion arm 18 may be divided into a single-acting absorber or a double-acting absorber according to the driving method. In addition, according to the driving fluid, a hydraulic method driven by hydraulic pressure, a gas method driven by gas, a spring method using spring force, and the like may be adopted. Since such a structure is a general known technology, a detailed description thereof will be omitted.

The rotary drive device 20 includes a support plate 43` fitted to the outer center shaft 10 as shown in FIG. A fourth reduction motor 44 mounted on the support plate 43 '; A second motive gear 45 which transmits power of the fourth reduction motor 44; A second driven gear (46`) meshed with the second motive gear (45) and rotating the inner central shaft (16); And a rotary joint 47 connected to the rear end of the second driven gear 46`.

The polishing block 22 includes a lower bracket 51 mounted at the tip of the expansion arm 18 as shown in FIGS. 10 and 11; A grinder 52 installed at the lower end of the lower bracket 51 to be in close contact with the conduit surface and to remove the scale of the conduit surface while performing rotation using air power by the rotation of the expansion arm 18; Auxiliary wheels 53 installed at both sides of the grinder 52 and in contact with a conduit surface; It is installed on the upper side of the lower bracket 51, and includes a hinge shaft (54a) protruding from both front and rear surfaces, a groove (54b) formed vertically on both sides of the upper surface and a plate spring (54c) housed in the groove (54b). A first clearance correction mechanism 54 for correcting the clearance such that the grinder 52 adheres to the conduit surface; The gap compensation action of the first clearance correction mechanism 54 is inserted into the hinge shaft 54a of the first clearance correction mechanism 54 with the bearing 55 interposed therebetween so that the grinder 52 does not have a gap in the front-rear direction. A first hinge 56 functioning as a central axis for the; An intermediate bracket (57) installed on an upper portion of the first gap correction mechanism (54); The expansion arm 18 is fixed and installed on the upper portion of the intermediate bracket 57, and is housed in the groove 58b vertically formed on both sides of the upper surface and the hinge shaft 58a protruding from both the left and right sides. A second clearance correction mechanism 58 for correcting the clearance such that the grinder 52 is in close contact with the conduit surface, including the plate spring 58c of the plate; The gap compensation action of the second clearance compensation mechanism 58 is inserted into the hinge shaft 58a of the second clearance correction mechanism 58 with the bearing 59 interposed therebetween so that the grinder 52 does not have a gap in the left and right directions. And a second hinge 60, which serves as the central axis for.

12, the grinder 52 is fixed to the lower end of the lower bracket 51 by bolting and has a fixing member 61 having inclined surfaces 61a and 61b intersecting the front and rear sides; A buffer plate 62 which is in close contact with each of the inclined surfaces 61a and 61b of the fixing member 61 and is fixed through a bolt and buffered in a buffered manner corresponding to the forward direction of the expansion arm 18; A sink 63 mounted on a bottom surface of the buffer plate 62 via a bolt; It is fixed to the sink 63, the tip portion is in close contact with the pipeline surface and includes a grind tip 64 to create a surface scratch on the surface of the pipeline while detaching the scale present on the surface of the pipeline surface.

The grind tip 64 is made of artificial diamond. The buffer plate 62 fixed to the inclined surface of the fixing member 61 has an X shape to double the area that the grind tip 64 can process in one rotation.

In addition, in the present invention, the grind tip 64 is as narrow as possible. In the present embodiment, the width of the grind tip 64 is not limited to a numerical value, and when a small diameter conduit surface is to be processed, a gap is formed between the grind tip 64 and the curved surface. By having a width that can be eliminated as much as possible, the polishing efficiency of a small pipe can be increased.

The buffer plate 62 is made of any one material of a rubber plate or a leaf spring. Accordingly, when the pipeline is a deformed pipeline such as an elliptical or crushed tube instead of a garden, when the grind tip 64 passes through the deformed pipeline, the buffer plate 62 is bent in addition to the angle θ of the inclined surface. It is possible to pass.

Angles θ of the inclined surfaces 61a and 61b of the fixing member 61 to which the buffer plate 62 is attached are inclined by a predetermined angle with respect to the vertical surface. Preferably, the inclined surfaces 61a and 61b have an inclination of ± 15 ° to 20 ° based on the vertical plane. This allows the grinding tip 64 to ride more flexibly as it rides over the scale formed on the surface of the deformed conduit.

In the polishing block 22 configured as described above, when the expansion arm 18 rotates while pressing the grinder 52, the grinder 52 rotates and rotates to remove scale, and in this process, uneven irregularities of the pipe surface. The grind tip 64 is not in close contact with the surface.

At this time, the first and second clearance correction mechanisms 54 and 58 are buffered by the action of the counter springs 54c and 58c, and the first and second clearance correction mechanisms 54 and 58 are arranged in a cross shape in the first and second clearance correction mechanisms 54 and 58. And the second hinge (56, 60) serves to block the buffer force against one bias of the dish spring, so that the gap of the grind tip 64 is corrected in the process of removing the scale while rotating and rotating at the same time close to the pipeline surface Will be.

It describes the operating state of the present invention configured as described above.

First, after inserting the polishing apparatus of the present invention into the old pipeline, the camera (not shown) installed in the central portion of the support body 2 while driving forward driving the first reduction motor (6) installed in the caterpillar (4) The front of the pipeline is to be examined by. In addition, when the inner central shaft 16 is rotated by the rotary drive device 20, the expansion arm 18 is installed in the radial direction at the tip of the inner central shaft 16 is rotated, the expansion arm The rotation of (18) causes the grinder to go through a series of processes to remove the scale formed on the inner surface of the conduit and to form a scratch on the conduit surface while rotating and rotating.

In the series of processes in which the polishing apparatus removes the scale, the polishing apparatus of the present invention moves the conduit by the caterpillar 4 moving in an endless track manner, so that it passes without difficulty even in a section where the diameter is reduced or in an extended section. Done. At this time, the expansion arm by preventing the center of the outer center shaft 10 from the center of the pipeline from passing through the tapered section by the operation of the horizontal pivoting device 12 and the tilting device 14 (18) is perpendicular to this duct surface. Accordingly, the distance between the grinder 52 and the conduit surface is in close contact with each other so that the scale in the diameter change section can be uniformly removed. That is, when the center of the outer center shaft 10 deviates from the center of the conduit at the passage of the reduction diameter section or the expansion section (a state in which the polishing apparatus of the present invention is inclined), the horizontal rotating device 12 rotates. While matching the center of the horizontal direction between the center of the outer center shaft 10 and the center of the pipeline, while the outer center shaft 10 is moved back and forth through the tilting device 14 between the center of the outer center shaft 10 and the center of the pipeline The center of the vertical direction is matched to offset the eccentric error between the center of the outer center shaft 10 and the center of the pipeline. In addition, as the extension arm 18 is extended or contracted by the distance from the center of the outer axis 10, the auxiliary wheel 53 installed at the tip of the extension arm 18 is in close contact with the inclined pipe surface, so that the outer axis 10 is connected to the pipeline. It will not deviate from the center of.

Referring to the operation of the tilting device 14, the forward and reverse rotational power of the third reduction motor 37 which is operated by the remote control is transmitted to the first driven gear 39 via the first motive gear 38. . The nut shaft 41 of the turnbuckle 40 rotates together with the rotation of the first driven gear 39. Accordingly, the left screw shaft 42 and the right screw shaft 43 coupled to the nut shaft 41 are rotated. This rotation pushes and pulls the suspension member 36, and the external central shaft 10 connected to the suspension member 36 ascends or descends by the inclination angle according to the diameter change by the operation. It will be to match the external central axis (10).

By the operation of the horizontal rotating device 12 and the tilting device 14, the center of the pipe line and the center of the external axis in the pipe diameter change section coincide with each other, and the distance between the polishing block 22 and the pipe surface is kept constant. You will get a uniform descaling plane.

In addition, when passing through the curved pipe, the second reduction motor (34), which is a horizontal rotating device (12), is operated by remote control, and the rotational force of the second reduction motor (34) drives the power transmission gear (33). It is transmitted to the spur gear 32 as an intermediary, and the external central shaft 10 connected to the shaft of the spur gear 32 passes while rotating by the radius of curvature of the curved pipe.

Next, the descaling process by the polishing block 22 will be described.

First, the internal central shaft 16 is rotated by the engagement of the second motive gear 45 and the second driven gear 46` received with the rotational force of the fourth reduction motor 44 of the rotary drive device 20. In this case, the expansion arm 18 installed to extend in the radial direction from the circumferential surface of the inner center shaft 16 is rotated.

The polishing block 22 provided on the tip side of the expansion arm 18 rotates while the expansion arm 18 rotates while pressing the grinder 52, thereby removing the scale while the grinder 52 rotates and rotates. In this process, the grind tip 64 does not come into close contact with the uneven surface of the conduit. At this time, the first and second clearance correction mechanisms 54 and 58 are buffered by the action of the counter springs 54c and 58c, and the first and second clearance correction mechanisms 54 and 58 are arranged in a cross shape in the first and second clearance correction mechanisms 54 and 58. And the second hinge (56, 60) serves to block the buffer force against one bias of the dish spring, so that the gap of the grind tip 64 is corrected in the process of removing the scale while rotating and rotating at the same time close to the pipeline surface Will be. In this way, the grind tip 64 is removed from the scale in close contact with the conduit surface, and scratches are formed on the descaled surface.

When the grind tip 64 moves while rotating, and passes through an elliptical or crushed deformation conduit, the buffer plate 62 obliquely mounted on the inclined surfaces 61a and 61b of the fixing member 61 is elastically opposite to rotation. It will be bent, the grind tip 64 is as flexible as the expansion arm 18 as the pressure pushing the protrusion of the conduit surface as the flexible pipe passes over. That is, the positional displacement caused by the expansion of the expansion arm 18 is flexibly crossed the deformation conduit because the expansion arm accommodates the hydraulic arm as it contracts.

The present invention can enter the customs unit into the old pipeline by unmanned power by remote control, and the scale can be removed while maintaining the center of the pipeline and the center of the customs unit can be scaled quickly and reliable scale The removal surface can be secured.

The present invention described above is not limited to the blasting machine and various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention, which will be apparent to those skilled in the art. will be.

2: support body 4: caterpillar
6: 1st geared motor 8: bracket
10: external center axis 12: horizontal rotating device
14: Tilting device 16: Internal central axis
18: extension arm 20: rotary drive
22: grinding block 100: main body
200: horizontal direction change and tilting drive device 300: polishing device

Claims (7)

Support body;
A bracket installed upright from the bottom surface of the support body;
Moving means installed on both sides of the support body and traveling in forward and backward directions in contact with an inner surface of a pipe;
A central shaft member supported by the bracket and positioned in the horizontal axis direction to match the center of the pipeline; And
Polishing means extending in the radial direction from the tip of the central shaft member, in close contact with the pipe surface to remove the scale generated on the surface of the pipe while rotating and rotating, and to form a scratch on the pipe surface;
The grinding means is
An extension arm extending in the radial direction of the central shaft member, the tip of which is in contact with the conduit surface, the telescopic arm being stretched in accordance with the change of the diameter;
A lower bracket mounted to the tip of the expansion arm;
A grinder installed at the lower end of the lower bracket and closely attached to the pipe surface to remove the scale of the pipe surface; And
A first installed at an upper portion of the lower bracket and including a hinge shaft protruding from both front and rear surfaces, a groove vertically formed at both sides of the upper surface, and a plate spring accommodated in the groove, respectively, to correct the gap so that the grinder is in close contact with the pipe surface; And a second clearance correction mechanism,
And the first and second clearance correction mechanisms are formed to be arranged at mutually intersecting positions.
delete The method of claim 1,
The grinder is
A fixing member fixed to the lower end of the lower bracket by bolts and having an inclined surface crossing the front and rear sides;
A buffer plate which is fixed to an inclined surface of the fixing member and which is buffered in correspondence with the forward direction of the expansion arm;
A sink mounted on one bottom surface of the buffer plate; And
Grind tip fixed to the sink and arranged in an X shape
Old pipe furnace surface polishing apparatus comprising a.
The method of claim 1,
The central shaft member is
An outer central shaft supported on the bracket and positioned in the horizontal axis direction to coincide with the center of the pipeline and having a first hollow portion; And
An inner central shaft having a second hollow portion through the first hollow portion of the outer central shaft
Old pipe furnace inner surface polishing apparatus comprising a.
The method of claim 4, wherein
Horizontal rotating means installed on the support body and rotating the external central axis in left and right directions so that the center of the external central axis coincides with the curved center;
Tilting means supported by the bracket for tilting an external central axis in a vertical direction; And
Rotation drive means located in the rear end of the outer central shaft, and driving to rotate the inner central shaft
The inner surface of the old pipe grinding machine further comprising a.
The method of claim 5, wherein
The horizontal rotation means
Spur gear is installed on the lower end of the bracket to rotate the external center axis in left and right directions;
A power transmission gear meshed with the spur gear; And
Reduction motor for providing rotational force to the power transmission gear
Old pipe furnace surface polishing apparatus comprising a.
The method of claim 5, wherein
The tilting means
A suspension member fitted to the outer central shaft;
A reduction motor that is supported by the bracket and rotates forward and backward;
A first driven gear configured to receive the rotational force of the reduction motor through a first prime gear;
Composed of a coupling structure of the nut shaft, the left screw shaft and the right screw shaft is mounted between the suspension member and the bracket, is inserted into the center of the first driven gear, and pushed and pulled the suspension member while being opened and narrowed according to the forward and reverse rotation of the first driven gear Turnbuckle for elevating the outer center shaft by motion
Old pipe furnace surface polishing apparatus comprising a.

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