JP3831226B2 - Drive device for rotating sleeve in continuous water cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive device for a rotating sleeve in a continuous water cutting device that cuts existing fluid pipes such as water pipes and gas pipes.
[0002]
[Prior art]
In this type of conventional continuous water cutting device, a rotating sleeve having a working hole for inserting a cutting tool is sheathed on the outer peripheral surface of the fluid pipe, and a cutting tool that rotates integrally with the rotating sleeve is inserted through the working hole. And the rotating sleeve is rotated to cut the fluid pipe surrounded by the rotating sleeve.
[0003]
Specifically, an endless chain is wound around a plurality of (for example, four) driven sprockets that are pivotally attached to the outer peripheral surface of the rotating sleeve so as to be non-rotatable and are arranged at a predetermined interval. The pipe is wound around a drive sprocket that is rotated by a drive source such as a geared motor disposed below, and the fluid sleeve is cut by the axial cutting feed of the cutting tool while the rotary sleeve is driven to rotate by the drive of the geared motor. Has been done.
[0004]
[Problems to be solved by the invention]
In such a conventional continuous water cutting device, when the rotary sleeve is driven to rotate by driving the geared motor when the fluid pipe is cut, the tension side of the chain wound between the drive sprocket and the plurality of driven sprockets Since the length of the wire changes every moment, a constant tension cannot be obtained.
[0005]
Accordingly, there is a problem that the cutting tool has a significantly shortened life due to not only promoting wear but also damaging due to fluctuations in cutting resistance acting on the cutting tool during processing, thereby causing wear.
[0006]
Further, since the cutting process is performed by intermittent feeding, a burr is generated at the cut end when the cutting process of the fluid pipe is completed, and there is a problem that the processing accuracy is also lowered.
[0007]
The present invention has been made in view of the above problems, and can provide a smooth cutting feed to the cutting tool, thereby extending the life of the cutting tool and improving the processing accuracy of the cutting end. An object of the present invention is to provide a drive device for a rotating sleeve in a continuous water cutting device.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the drive device for the rotating sleeve in the continuous water cutting device of the present invention rotates the rotating sleeve provided with a cutting tool sealed on the outer peripheral surface of the fluid pipe, and uses the rotating sleeve. A continuous water cutting device for cutting the enclosed fluid pipe, wherein one end of a chain is fixed and wound around the outer periphery of the rotating sleeve, and the other end of the chain is pulled and driven by a driving device together with the rotating sleeve. The fluid pipe is cut by a rotating cutting tool.
According to this feature, the tension on the tension side of the chain becomes constant by pulling the other end of the chain wound with the one end fixed to the outer periphery of the rotating sleeve by the driving device, so that the cutting tool has a constant tension. Cutting resistance can be obtained, smooth cutting feed can be obtained, thereby extending the life of the cutting tool and improving the processing accuracy of the cutting end.
[0009]
In the rotating sleeve driving device in the continuous water cutting device according to the present invention, it is preferable that the chain is disposed on both sides of the rotating sleeve with a cutting tool interposed therebetween and wound around the rotating sleeve in the same direction.
In this way, the left and right balance can be achieved when the rotating sleeve rotates, so that a stable cutting feed of the cutting tool can be obtained.
[0010]
In the drive device for the rotating sleeve in the continuous water cutting device according to the present invention, it is preferable that the chain is disposed on both sides of the rotating sleeve with the cutting tool interposed therebetween and wound around the rotating sleeve in opposite directions. .
In this way, the cutting tool can be fed in forward and reverse directions.
[0011]
The drive device for the rotating sleeve in the continuous water cutting device according to the present invention is such that the rotating sleeve has an inner peripheral surface or both ends thereof supported by a plurality of rollers pivotally supported on the circumference of a housing externally held on the outer peripheral surface of the fluid pipe. It is preferably guided and supported.
In this way, it is possible to prevent the axial or radial runout of the rotating sleeve during processing.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The example which applied the continuous water cutting device of this invention to the expansion-contraction flexible apparatus is demonstrated with reference to FIGS. 1-3. 1 is a partially cutaway side view of a continuous water cutting device showing a state in which an existing fluid pipe is cut by a cutting tool, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a partial view of the continuous water cutting device. It is the B section expanded sectional view of FIG. 1 expanded.
[0013]
In FIG. 1, reference numeral 1 denotes an existing fluid pipe, for example, a steel water pipe, which is exposed for a required length by excavating the ground 12, and is set at an elevated position, for example, a cutting tool 2 such as an end mill. It is cut by. As shown in FIG. 3, the casing 3-1 at the uppermost end of the rotating sleeve 3 that is rotatably supported on the outer periphery of the water pipe 1 advances and retracts the cutting tool 2 toward the center of the fluid pipe 1 and rotates. The cutting tool drive housing 4 having a drive mechanism is screwed. The lowermost casing 3-2 of the rotating sleeve 3 is a half-structured cylindrical casing, and a part of the circumference projects in the radial direction, and the cutting tool 2 can be inserted into the center. A hole 3a is formed.
[0014]
When the water pipe 1 is cut, the cutting tool 2 can be moved up and down in the work hole 3a, although not shown in particular, and the outer periphery of the water pipe 1 is moved by the downward movement of the cutting tool 2 toward the center of the water pipe 1. After penetrating, the water pipe 1 is cut by rotating the cutting tool 2 around the axis of the tool and rotating it around the water pipe 1 together with the rotating sleeve 3.
[0015]
On the other hand, a spherical guide sleeve 13 and a straight tubular guide sleeve 14 having a vertically divided structure are externally fitted on the outer peripheral surface of the water pipe 1 at a predetermined dimension and spaced apart from each other by a predetermined size. While being welded to the outer peripheral surface of 1, the upper and lower butted surfaces divided into two are welded to each other so as to be sealed.
[0016]
Around the water pipe 1 between the left and right guide sleeves 13, 14, a pair of left and right cases 15, 15 made of steel having a vertically divided cylindrical structure have a required annular gap between the opposing surfaces. Is formed, and an annular space S is also formed between the outer peripheral surface of the water pipe 1 so as to be fitted, and the upper and lower butted surfaces are integrated by welding.
[0017]
The rotating sleeve 3 that holds the cutting tool 2 is held in a fluid-tight sliding manner on the outer periphery of the center of both housings 15, and a straight tubular guide sleeve 14 is attached to the outer end of the right housing 15. A packing holder 24 that houses and holds a packing 16 that slides in contact with the outer peripheral surface and seals liquid-tightly is provided. The packing holder 24 is supported on the outer peripheral surface of the straight tubular guide sleeve 14 so as to be axially movable.
[0018]
The right straight tubular guide sleeve 14 has a right cylindrical shape, an annular stopper 14a is formed at the inner end thereof, and an annular fixing jig 20 having an upper and lower split structure is fixed to the outer periphery of the outer end portion. It is worn.
[0019]
The annular fixing jig 20 has a sheet metal welding structure, and includes an annular base 20a attached to the straight tubular guide sleeve 14, a flange 20b raised on the outer periphery of the inner end of the annular base 20a, and a flange. A cylindrical body 20c projecting and joined to the outer periphery of 20b, a side plate 20d joined perpendicularly to the inner end of the cylindrical body 20c, and a side plate 20d projecting inward and rotatable. And an anti-sway roller 22 supported on the shaft.
[0020]
Further, inside the cylinder 20c, a packing holder 24 having a short flange 24a projecting from an outer peripheral end portion is accommodated so as to be axially movable. The packing holder 24 is a flange 24a on the outer periphery of the packing holder 24. Is sandwiched between the lower end of the side plate 20d projecting toward the axial center side of the water pipe 1 and the push bolt 23 into which the flange 20b is screwed and positioned in the axial direction. In this way, the right casing 15 is non-rotatably supported by the packing holder 24 slidably held on the right straight tubular guide sleeve 14.
[0021]
Similarly, the left casing 15 having a right cylindrical shape has a packing holder 25 that accommodates and holds a packing 16 that is slidably contacted with the outer peripheral surface of the left spherical guide sleeve 13 and sealed in a liquid-tight manner at the outer end. The packing holder 25 is supported in a state in which the packing 16 is in sliding contact with a substantially middle portion of the spherical surface 13a of the left spherical guide sleeve 13 in which the annular stopper 13b is continuously provided at both ends. An annular fixing jig 18 having an upper and lower split structure is fastened to the outer periphery of the annular stopper 13b at the outer end of the spherical guide sleeve 13 with a bolt (not shown).
[0022]
The annular fixing jig 18 is a sheet metal welding structure, and includes an annular base 26a mounted on the outer periphery of the annular stopper 13b at the outer end of the spherical guide sleeve 13, and a flange 26b raised on the outer periphery of the annular base 26a. And a cylindrical body 26c projecting and joined to the outer periphery of the flange 26b, a side plate 26d joined perpendicularly to the inner end of the cylindrical body 26c, and projecting inwardly to the side plate 26d. The anti-sway roller 22 is rotatably supported by the shaft.
[0023]
Further, a packing holder 25 having a short flange 25a projecting from an outer peripheral end portion is accommodated inside the cylindrical body 26c so as to be movable in the axial direction. The packing holder 25 is a flange 25a on the outer periphery of the packing holder 25. Is sandwiched between the lower end of the side plate 26d projecting toward the tube axis side and the inner end of the annular base 26a, and is positioned in the axial direction by a bolt 28.
[0024]
As described above, the outer peripheral upper surfaces of the pair of left and right casings 15 and 15 configured such that both outer end portions are supported by the packing holders 24 and 25 on the spherical guide sleeve 13 or the straight tubular guide sleeve 14 respectively. The rotary sleeve 3 having an upper and lower split structure is loosely fitted to the flanges 15a of the two casings 15, so that the movement in the tube axis direction is restricted and the outer sleeve is rotatably fitted, and the rotary sleeve 3 is slidable. The outer peripheral surfaces of the two housings 15 and 15 supported by the liquid are sealed in a liquid-tight manner by a seal member (packing) 50.
[0025]
The packing 50 is preferably made of hard rubber or the like having a low sliding resistance with respect to both the casings 15. The packing 50 is damaged when the rotating sleeve 3 is rotated around the casing 15 and the packing 50 is kinked. Is prevented.
[0026]
A work hole 3a is formed in the center of the peripheral wall of the rotary sleeve 3, and a gate valve device 10 shown in FIGS. 2 and 3 and a cutting tool drive mechanism 5 are sealed in the upper end of the work hole 3a. The lower open end extends to the vicinity of the outer periphery of the water pipe 1. The gate valve device 10 includes a valve body 8 capable of opening and closing a pipe line communicating with the work hole 3a, and a moving mechanism 9 for moving the valve body forward and backward in a direction perpendicular to the pipe line by screw feed.
[0027]
As shown in FIG. 2, the cutting tool drive mechanism 5 includes a screw feed type lifting mechanism 6 that moves the end mill, which is a rotating tool, forward and backward toward the center of the water pipe 1, and a hydraulic motor 7 that rotationally drives the end mill 2. It has.
[0028]
Next, the rotating sleeve driving device of the present invention will be described with reference to FIGS. 4 is an enlarged sectional view of a portion C in FIG. 3, FIG. 5A is a side view of the annular support, FIG. 6B is a front view of the annular support, and FIG. 6 is a partial perspective view of the annular support. is there. In addition, about the same structural member as the structural member which concerns on the said embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
[0029]
Reference numeral 35 shown in the figure denotes an annular support, and the annular support 35 is attached to both sides of the rotary sleeve 3 so as to protrude outwardly from the outer periphery of both ends of the rotary sleeve 3. The annular support 35 has a split structure in which an attachment piece 30a for attaching to the rotating sleeve 3 is provided on the inside, and a flange F in which a notch for inserting the chain 36 is formed at the center. And a guide ring 32 attached to the outer periphery of the support ring 30 and having chain guides 38a and 38b for guiding both sides of the chain 36 on the outer periphery.
[0030]
The outer end portions of both annular supports 35 are rotatably supported by a plurality of steadying rollers 22 whose inner peripheral surfaces of the support ring 30 are pivotally supported by the annular fixing jigs 18, 20. Each has a chain guard 40 attached thereto.
[0031]
The chain guards 40 have a U-shaped downward cross section so as to cover the upper part of the chain 36 and are formed in the same arc shape as the arc of the guide ring 32, and a fixing portion 42 for fixing one end of the chain 36 is provided at one end. .
[0032]
That is, as shown in FIGS. 5 and 6, the chain 36 having one end fixed to the fixed portion 42 of the chain guard 40 is wound around the outer periphery of the guide ring 32 while being guided by the chain guides 38 a and 38 b. Then, the second chain 36 is wound around the upper part of the chain 36 having one end fixed. Therefore, the upper portion of the first winding chain 36 on which the second winding chain 36 is wound in an overlapping manner is protected by a chain guard 40.
[0033]
In FIG. 1, both ends of a drive shaft 45 parallel to the tube shaft are rotatably supported by brackets 37 and 37 by bearings (not shown) below the rotary sleeve 3 in the base plate 46 laid on the ground 12. One end of a second winding chain 36 is connected to both ends of the driving shaft 45, and a pair of driving drums 44 are fixed for winding the chain 36 by rotation to drive the chain. The drive shaft 45 can be rotated at a slow speed by attaching the left end of the drive shaft 45 to the rotation shaft 39 a of the geared motor 39.
[0034]
Next, a method of cutting and stretching the fluid pipe with the above-described continuous water cutting device to make it flexible to expand and contract will be described. First, as shown in FIG. 1, the left and right guide sleeves 13 and 14, the casings 15 and 15, and the rotating sleeve 3 are attached to the water pipe 1 exposed by excavating the ground 12 in this order, 14 are supported by a pair of left and right support bodies 48 erected on a base plate 46.
[0035]
Next, as shown in FIG. 3, annular fixing jigs 18 and 20 are mounted on the outer periphery of the outer ends of the guide sleeves 13 and 14, and the packing holders 24 and 25 are positioned and supported by the annular fixing jigs 18 and 20. By doing so, the housings 15 and 15 are arranged to face each other so that an annular gap is formed, and the rotating sleeve 3 is supported on the outer peripheral surfaces of the housings 15 and 15 arranged to face each other via the packing 50.
[0036]
Then, after attaching the gate valve device 10 and the cutting tool drive mechanism 5 to the upper opening of the working hole 3a of the rotating sleeve 3, the inner ends of the annular support 35 are attached to both ends of the rotating sleeve 3, and the outer side thereof The end is rotatably supported by a plurality of steadying rollers 22 pivotally supported by the annular fixing jigs 18 and 20.
[0037]
Next, a geared motor 39 and a pair of drive drums 44 are installed on the base plate 46 below the rotary sleeve 3, and a pair of chains 36 are formed on part of the outer periphery of both guide rings 32 constituting the annular support 35. One end is fixed, and the other end is wound around the drive drum 44 with the chain 36.
[0038]
Next, in the state shown in FIG. 2, the chain 36 is turned into the state shown in FIG. 5 and FIG. 6 in the state shown in FIG. As shown, a state where one or more turns are wound around the outer peripheral surface of the annular support 35 and the drive drum 44 is rotated to the initial state so that the chain 36 is stretched.
[0039]
In this state, the hydraulic motor 7 is operated to rotate the end mill 2, and a handle (not shown) attached to the upper end of the elevating mechanism 6 is rotated to lower the end mill 2 toward the upper end surface of the water pipe 1.
[0040]
The upper end of the water pipe 1 is perforated by the hydraulic motor 7 at the tip of the end mill 2 and at the same time the pair of drive drums 44 are simultaneously driven to rotate by the geared motor 39 to pull both the chains 36 so that the rotating sleeve 3 is fixed Make one turn in the direction. At this time, the annular supports 35 at both ends of the rotating sleeve 3 are smoothly swung in a state in which the movement in the axial direction is restricted by the plurality of steadying rollers 22 to prevent rattling in the tube axis direction.
[0041]
In this way, when the rotating sleeve 3 is rotated slowly, the water pipe 1 is cut with the width of the outer diameter of the end mill 2.
[0042]
When the cutting process is completed, the cutting device 5 is removed and a water faucet mounting device (not shown) is attached, and then the valve body 8 is opened, and the water faucet is press-fitted into the working hole 3a of the rotating sleeve 3 and sealed. Next, the stop cock attaching device and the gate valve device 10 are removed, and a retaining plate is fastened to the upper opening surface of the working hole 3 a of the rotating sleeve 3.
[0043]
Finally, by removing the annular fixing jigs 18 and 20, the separated water pipe 1 is supported in a flexible state, and may be damaged even if the relative displacement amount in the vertical direction or the like becomes large. If the drive system such as the chain 36, the base plate 46, the geared motor 39, and the pair of drive drums 44 attached to the outer peripheral surface of the rotating sleeve 3 is removed and the exposed water pipe 1 is backfilled, Construction is complete.
[0044]
As described above, according to the driving device of the rotating sleeve in the continuous water cutting device according to the present embodiment, the other end of the chain 36 wound with the one end fixed to the outer periphery of the rotating sleeve 3 is connected to the pair of driving drums 44. Since the tension on the tension side of the chain 36 is constant by being wound around and rotated in one direction, a constant cutting resistance can be obtained in the end mill 2 and a smooth cutting feed can be obtained. In addition to extending the service life, the processing accuracy of the cut end can be improved.
[0045]
Further, since the chain 36 is wound in the same direction with respect to the rotating sleeve 3 disposed on both sides of the rotating sleeve 3 with the end mill 2 interposed therebetween, the left and right balance can be achieved when the rotating sleeve 3 rotates. 2 stable cutting feeds can be obtained.
[0046]
Next, in another embodiment, in the above embodiment, the pair of chains 36 disposed on both sides of the rotating sleeve 3 with the end mill 2 interposed therebetween are wound around the rotating sleeve 3 in the same direction. The rotating sleeve 3 is configured to be wound in opposite directions.
[0047]
In this manner, not only can the annular support 35 be set to the initial state by using the drive of the geared motor 39, but also the cutting tool 2 can be fed in forward and reverse directions.
[0048]
【The invention's effect】
The present invention has the following effects.
[0049]
(A) According to the invention of claim 1, the tension on the tension side of the chain is fixed by the drive device at the other end of the chain wound with the one end fixed to the outer periphery of the rotary sleeve. Thus, a constant cutting resistance can be obtained, and a smooth cutting feed can be obtained. As a result, the life of the cutting tool can be extended and the processing accuracy of the cutting end can be improved.
[0050]
(B) According to the invention of claim 2, since the left and right balance can be achieved when the rotary sleeve rotates, it is possible to obtain a stable cutting feed of the cutting tool.
[0051]
(C) According to the invention of claim 3, forward and reverse feeds can be given to the cutting tool.
[0052]
(D) According to the invention of claim 4, it is possible to prevent the axial or radial deflection of the rotating sleeve during processing.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a continuous water cutting device showing a state in which an existing fluid pipe is cut by a cutting tool.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is an enlarged cross-sectional view of a part B of FIG. 1 in which a part of the continuous water cutting device is enlarged.
4 is an enlarged cross-sectional view of a portion C in FIG. 3;
5A is a side view of an annular support, and FIG. 5B is a front view of the annular support.
FIG. 6 is a partial perspective view of an annular support.
[Explanation of symbols]
1 Fluid pipe (water pipe)
2 End mill (cutting tool)
DESCRIPTION OF SYMBOLS 3 Rotating sleeve 3a Working hole 3-1, 3-2 Casing 4 Cutting tool drive housing 5 Cutting tool drive mechanism 6 Lifting mechanism 7 Hydraulic motor 8 Valve body 9 Moving mechanism 10 Gate valve device 12 Ground 13 Spherical guide sleeve 13a Spherical surface 13b Ring Stopper 14 Straight tubular guide sleeve 14a Annular stopper 15 Housing 16 Packing 18 Annular fixing jig 20 Annular fixing jig 20a Annular base 20b Flange 20c Cylindrical body 20d Side plate 22 Roller 23 Bolt 24 Packing holder 24a Flange 25 Packing holder 25a Flange 26a Annular Base 26b Flange 26c Cylindrical body 26d Side plate 28 Bolt 30 Support ring 30a Mounting piece 32 Guide ring 35 Annular support 36 Chain 37, 37 Bracket 38a Chain guide 39 Geared motor 39a Rotating shaft 40 Che The guard 42 stationary portion 44 drives the drum 45 driving shaft 46 base plate 48 supporting body 50 packing F flange S annular space

Claims (4)

A continuous water cutting device for rotating a rotating sleeve provided with a cutting tool sealed in a sealed state on an outer peripheral surface of a fluid pipe, and cutting the fluid pipe surrounded by the rotating sleeve,
One end of a chain is fixed and wound around the outer periphery of the rotating sleeve, and the other end of the chain is pulled and driven by a driving device, and the fluid pipe is cut by a cutting tool that rotates together with the rotating sleeve. A drive device for a rotating sleeve in a continuous water cutting device. The drive device of the rotating sleeve in the continuous water cutting device according to claim 1, wherein the chain is disposed on both sides of the rotating sleeve with the cutting tool interposed therebetween, and is wound around the rotating sleeve in the same direction. 2. The drive device for the rotary sleeve in the continuous water cutting device according to claim 1, wherein the chain is disposed on both sides of the rotary sleeve with the cutting tool interposed therebetween, and is wound around the rotary sleeve in opposite directions. The inner surface or both ends of the rotating sleeve are guided and supported by a plurality of rollers pivotally supported on the circumference of a housing externally held on the outer peripheral surface of the fluid pipe. Rotating sleeve drive device in the continuous water cutting device.

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