JP2007007760A - Perforating device for rehabilitating pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a perforating device for rehabilitating a pipe, which can efficiently perform rehabilitation work of the pipe by stabilizing a perforation capability of the perforating device. <P>SOLUTION: The perforating device for rehabilitating the pipe is equipped with a device body, a perforating cutter rotatably provided on the device body, a perforating cutter drive means 45 for driving to rotate the perforating cutter, a lifting drive means 41 for lifting the perforating cutter relative to the device body, and an oscillating drive means 6 for oscillating the perforating cutter to the right and left around the lengthwise shaft. The perforating device is equipped with a first operating fluid supply source for supplying the operating fluid to the perforating cutter drive means 45, and a second operating fluid supply source for supplying the operating fluid to the lifting drive means 41 and the oscillating drive means 6 respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rehabilitating pipe punching device used for forming an opening in a taken-out portion of a closed branch pipe during a pipe rehabilitation operation for forming a rehabilitation pipe in an existing pipe such as a sewer pipe.

  As a rehabilitation tube perforating apparatus, a perforating apparatus described in Patent Document 1 below is conventionally known. In this conventional perforating apparatus, a cutting section provided with a rotary cutter for forming an opening in a branch pipe take-out portion is provided in the apparatus main body. And a lift part for moving this cutting part up and down with respect to the apparatus main body, a reach part for moving back and forth with respect to the apparatus main body, and a swing part for rotating left and right with respect to the apparatus main body, Is provided in the apparatus main body.

  Further, the apparatus main body is provided with an outrigger for extending and contracting in the vertical direction for positioning and fixing the apparatus main body in the pipe during the pipe renovation work.

  Furthermore, a cutting control valve, a lift control valve, a reach control valve, a swing control valve, and an outrigger control valve for controlling the working fluid for operating the rotary cutter, lift unit, reach unit, and swing unit, respectively. It is provided on the main body.

The working fluid is supplied to the working portion from a working fluid supply source such as a single hydraulic pump provided in the hydraulic unit on the perforated wheel side via a hydraulic hose or the like.
JP 2000-97388 A

  In the above-mentioned conventional rehabilitation pipe punching device, all of the above valves are provided by providing a cutting control valve, a lift control valve, a reach control valve, a swing control valve and an outrigger control valve in the punching device body. The number of hydraulic hoses can be greatly reduced as compared with the case where the pier is provided on the perforated wheel side. That is, when each valve is provided on the piercing wheel side, it is necessary to connect a total of ten hydraulic hoses for each feed and return from the piercing wheel side to the piercing device. In addition, if each valve is provided on the main body side of the punching device, only two hydraulic hoses are required, so that the entanglement of the hose can be greatly reduced, and this allows the smooth movement of the drilling device during the operation. There is.

  However, in the structure for supplying the working fluid from one working fluid supply source to each working part of the rotary cutter, the lift part, the reach part, the swing part and the outrigger as in the conventional rehabilitation pipe punching device, the following problems are caused. There is.

  In the pipe rehabilitation work, the opening of the branch pipe take-out part of the rehabilitation pipe is done, but at that time, the cutting part is moved up and down while rotating the rotary cutter at all times, or the rotary cutter is rotated left and right. It is necessary to slide back and forth. In other words, it is necessary to operate the rotary cutter and the other operating parts in parallel, but the structure for supplying the working fluid from one working fluid supply source to all of the plurality of operating parts as in the conventional perforating apparatus. Then, for example, when the lift unit is operated to raise and lower the cutting unit while the rotary cutter is operating, the supply of the working fluid to the rotary cutter is weakened, and as a result, the drilling caused by the rotation of the rotary cutter becoming unstable There is a problem in that the bite into the lining material of the blade occurs, and the pipe renovation work is significantly reduced.

  The present invention has been made to solve the problems of the conventional perforating apparatus, and a rehabilitated pipe perforating apparatus capable of realizing efficient pipe rehabilitation work by stabilizing the perforating ability of the perforating apparatus. The purpose is to provide.

  In order to achieve the above object, a rehabilitating tube punching device according to a first aspect of the present invention comprises a device main body, a drilling blade rotatably provided on the device main body, and a drilling blade for rotationally driving the drilling blade. Drive means; lifting drive means for moving the drilling blade up and down relative to the apparatus main body; and swing drive means for swinging the drilling blade left and right about the longitudinal axis of the apparatus main body. A rehabilitation pipe drilling device, a first working fluid supply source for supplying a working fluid to the drilling blade driving means, and a second working fluid supply source for supplying the working fluid to the lifting drive means and the swing driving means, respectively. It is equipped with.

  According to a second aspect of the present invention, there is provided a rehabilitation pipe punching device provided with an electromagnetic control valve for an elevation drive means and an electromagnetic control valve for an oscillation drive means for controlling the operation of the elevation drive means and the oscillation drive means on the apparatus main body side. On the other hand, an electromagnetic control valve for drilling blade driving means for controlling the operation of the drilling blade driving means is provided on the vehicle side provided with a supply source for supplying working fluid to each driving means.

  According to the first aspect of the present invention, the working fluid supply source that supplies the pressure oil to each drive unit is the first working fluid supply source that supplies the pressure oil only to the drilling blade driving means for driving the drilling blade to rotate. And the second working fluid supply source for supplying pressure oil to each driving means other than the drilling blade driving means. For example, during the rotation driving of the drilling blade as in the conventional drilling device, for example, the lifting drive means , It is possible to reliably prevent the situation where the supply of pressure oil to the drilling blade drive means weakens and the rotation of the drilling blade stops and the drilling operation cannot be carried out. It can be avoided.

  Further, according to the invention of claim 2, in addition to the effect of the invention of claim 1, the electromagnetic control valve for the punching blade driving means for controlling the operation of the punching blade driving means is provided on the vehicle side. The valve unit provided with each electromagnetic control valve for controlling the operation of the driving means can be made compact and can be connected to the drilling device, thereby improving the workability of carrying in and out of the drilling device into the pipe. Can do. Furthermore, when an electromagnetic control valve for a drilling blade driving means is provided in the valve unit connected to the drilling device, if the electrical wiring connected to the valve unit is disconnected, the drilling device itself is removed from the pipe. Although it is necessary to carry out repairs by carrying it out, if an electromagnetic control valve for drilling blade driving means is provided on the vehicle side as in the invention according to claim 2, an accident related to the electromagnetic control valve for drilling blade driving means If so, there is no need to perform the troublesome work of unloading the perforating apparatus itself from the inside of the pipe.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the overall configuration of the rehabilitation tube punching device will be described.

  2 is a longitudinal sectional view showing a use state of the drilling device in the buried pipe, FIG. 3 is an enlarged view taken along arrow A in FIG. 2, and FIG. 4 is an enlarged horizontal vertical sectional view of a main part of the drilling device (in FIG. 2). FIG. 5 is an enlarged vertical vertical sectional view of a main part of the drilling machine (cross sectional view taken along the line CC in FIG. 4), and FIG. 6 is a DD line in FIG. FIG.

  In FIG. 2, for example, a lining material L for repairing or reinforcing the pipe P is coated on the inner surface of the sewage main pipe P embedded in the underground E. As is well known, a tubular thermosetting resin is inserted into the sewage main pipe P from a manhole (not shown), and is expanded and thermoset to adhere to the inner surface of the sewage main pipe P. From the middle of the sewage main pipe P, a plurality of branch pipes Pa are branched corresponding to a plurality of houses on the ground, and the branch portions are blocked by the lining material L. In order to perforate the closed portion, for example, a rehabilitation pipe perforating device (hereinafter simply referred to as a perforating device) that is inserted into the sewage main pipe P from a manhole and is movable in the main pipe P is used.

  Next, a specific configuration of the perforating apparatus will be described with reference to FIGS.

  The perforating apparatus has a main body 1 that can move in the sewage main pipe P, and extends vertically through the central portion of the main body 1 so that the base can be rotated to the main body 1 via a bearing 21 and a spline bearing 22. The rotary shaft 2 is formed of a spline shaft supported by the shaft, and the tip of the rotary shaft 2 is fitted through a spline bearing 22 so as to be axially slidable and relatively non-rotatable. The swivel inner 3 supported so as to be axially slidable and relatively rotatable via the stub, the perforated part 4 attached to the tip of the swivel inner 3, and the swivel inner 3 via the swivel outer 31. On the other hand, a slide drive means 5 that can be driven back and forth in the axial direction (front-rear direction) and a swing drive means 6 that forcibly rotates the rotation shaft 2 relative to the apparatus main body 1 are provided.

  A pair of left and right bowl-shaped support legs 1a, 1a are integrally and symmetrically arranged side by side in the lower half of the outer periphery of the apparatus body 1, and the apparatus body is interposed through these support legs 1a, 1a. 1 can slide in the sewage main pipe P.

  Further, as shown in FIG. 5, a hydraulic double-acting outrigger cylinder 7 constituting a main part as an outrigger driving means extending in the vertical direction is disposed at the center of the rear portion 1R of the apparatus main body 1. A rubber pressure pad 72 as an outrigger facing the inner surface of the ceiling of the sewage main pipe P is connected to the piston rod 71 of the cylinder 7. An upper end of a guide rod 73 that is slidably fitted and supported on the apparatus main body 1 in parallel with the piston rod 71 is connected to the pressing pad 72, thereby rotating the pressing pad 72 around the piston rod 71. Be blocked.

  The pair of hydraulic oil chambers of the outrigger cylinder 7 reach the rear end portion of the apparatus main body 1 through an oil passage formed in the rear portion 1R of the apparatus main body 1, and can pass through the valve unit 10 and a joint (not shown) from there. It is connected to a flexible external pipe.

  Thus, when the outrigger cylinder 7 is extended, the pressure pad 72 can be brought into pressure contact with the inner surface of the ceiling of the sewage main pipe P. In this pressure contact state, the pressure pad 72 cooperates with the support legs 1a and 1a. The device main body 1 can be fixed and held at an arbitrary position in the sewage main pipe P, that is, cannot be rotated and cannot be moved in the axial direction.

  The front portion 1F of the apparatus body 1 is formed in a cylindrical shape, and the swivel outer 31 that is also formed in a cylindrical shape is slidably fitted and supported on the inner peripheral surface of the front portion 1F. The swivel inner 3 is fitted and supported on the inner peripheral surface of the swivel outer 31 so as to be relatively rotatable and not capable of relative movement in the axial direction. The rear end portion of the swivel outer 31 is connected to a piston rod 52 of a hydraulic double-acting slide cylinder 51 that forms the main part of the slide drive means 5. The pair of hydraulic oil chambers of the slide cylinder 51 reach the rear end portion of the apparatus main body 1 through an oil passage formed in the apparatus main body 1, and are connected to an external pipe through the valve unit 10 and a joint therefrom.

  Thus, by the expansion and contraction operation of the slide cylinder 51, the perforated portion 4 can be slid in the front-rear direction with respect to the apparatus main body 1 via the swivel outer 31, and thus the swivel inner 3.

  The slide cylinder 51 is disposed on the left and right sides of the outrigger cylinder 7 in the rear portion 1R of the apparatus main body 1. On the other side of the left and right sides, a swing motor that forms the main part of the swing drive means 6 is provided. 61 is disposed.

  The swing driving means 6 includes a swing motor 61 having an output shaft 62 extending in parallel with the rotation shaft 2, and a spur gear train 63 that rotates the rotation shaft 2 in conjunction with the output shaft 62 of the swing motor 61. It is composed of. And the brake means 8 which has the brake pad which can be press-contacted to the outer peripheral part of the one part gearwheel (large diameter gearwheel 64 mentioned later) of the spur gear train 63, and can hold | maintain the rotating shaft 2 in arbitrary rotation positions. Is disposed in the front-rear center portion of the apparatus main body 1 (above the rear end portion of the rotating shaft 2 in the illustrated example). The brake means 8 is hydraulically operated, and switching between operation and non-operation is performed using the hydraulic pressure of the swing motor 61 as will be described later.

  A pair of oil inlets and outlets of the swing motor 61 are opened at the rear end portion of the apparatus main body 1, and are connected to an external pipe from there through the valve unit 10 and joints.

As shown in FIGS. 4 and 6, the spur gear train 63 is concentrically connected to the small-diameter gear 65 fixed concentrically to the output shaft 62 of the swing motor 61 and the rear end portion of the rotating shaft 2. The large-diameter gear 64 is fixed, and the brake means 8 can exert a braking action on the large-diameter gear 64.
As shown in FIG. 6, the brake means 8 has a roller 81 made of an elastic friction material such as hard rubber facing the outer peripheral portion of the large-diameter gear 64, and holds the roller 81 and can slide on the apparatus main body 1. The roller support member 82 supported by the roller and the roller 81 can be constantly urged toward the outer peripheral portion of the gear via the roller support member 82 to press the outer peripheral portion of the roller 81 against the outer peripheral portion of the large-diameter gear 64. A hydraulic single-acting type that forcibly separates the roller 81 from the outer peripheral portion of the large-diameter gear 64 against the biasing force of the return spring when the return spring (not shown) and the hydraulic pressure of the swing motor 61 are supplied. The brake cylinder 84 is provided.

  A support block 42 having a built-in hydraulic double-acting lifting cylinder 41 that forms a main part as lifting driving means arranged in the vertical direction is integrally coupled to the tip of the swivel inner 3. The support block 42 supports a perforated portion main body 44 through a guide rail 43 extending in the vertical direction so that the perforated portion main body 44 can be moved up and down. It is connected to 41 piston rods 41a. The pair of hydraulic oil chambers of the elevating cylinder 41 includes an oil passage formed in the support block 42, an oil passage formed in each of the swivel inner 3 and the swivel outer 31, and an oil formed in the rear portion 1R of the apparatus main body 1. It reaches the rear end portion of the apparatus main body 1 sequentially through the road, and is connected to the external pipe through the valve unit 10 and the joint.

  A cutter motor 45 forming a main part as a drilling blade driving means is disposed inside the punching unit main body 44, and a branch pipe Pa branching part of the sewage main pipe P is provided on the output shaft of the cutter motor 45. A conventionally known drilling blade 46 capable of cutting off the closing lining L is coupled. A pair of oil passages formed in the perforated part main body 44 and connected to the cutter motor 45 for driving the perforated blade is connected to the flexible external pipe 47 connected between the perforated part main body 44 and the support block 42 and the support block 42. The oil passage formed in the swivel inner 3 and the swivel outer 31 and the oil passage formed in the rear portion 1R of the device main body 1 are sequentially reached to the rear end portion of the device main body 1, from which the valve The unit 10 is connected to external piping via a joint.

  The external piping is connected to a later-described hydraulic unit provided in, for example, a vehicle (a perforated vehicle) on the ground through the sewage main pipe P and a manhole.

  Next, the operation of the embodiment will be described. The drilling device is inserted into the sewage main pipe P from a manhole (not shown), and is pulled to the axis of the sewage main pipe P by being pulled by a pulling rope (not shown) connected to an appropriate position of the main body 1 of the drilling device. Move along. Then, after the perforating device is moved to the vicinity of the branch pipe Pa branching portion in the sewage main pipe P, the outrigger cylinder 7 is operated to extend to press the pressing pad 72 against the inner surface of the sewage main pipe P. The apparatus main body 1 is fixed inside.

  Then, the slide cylinder 51 is extended to drive the swivel outer 31 and the swivel inner 3 (and hence the perforated portion 4) forward relative to the apparatus body 1, and the swing motor 61 is driven forward or reverse to rotate the rotation shaft. By swinging the swivel inner 3 in the left-right direction via 2, the drilling blade 46 of the drilling part 4 is placed at an appropriate drilling work position for the branching part, that is, a position facing the lining L corresponding to the branching part. .

  After that, while operating the cutter motor 45 to rotate the drilling blade 46, the lifting cylinder 41 is extended to advance (lift) the drilling blade 46, so that the lining L corresponding to the branching portion is cut and removed. Is done.

  The above-described series of operations is performed by an operator operating the ground hydraulic control device while confirming on the ground a video of a surveillance camera provided at a proper position of the drilling device A or provided separately from the drilling device. Done.

  Incidentally, FIG. 1 is a hydraulic piping diagram of the drilling apparatus configured as described above.

  In FIG. 1, 9 is a hydraulic unit mounted on the perforated wheel, 1 is the above-described apparatus main body, and 10 is a valve unit connected to the apparatus main body 1.

  The hydraulic unit 9 includes a first hydraulic pump P1 as a first working fluid supply source that supplies pressure oil as a working fluid only to a cutter motor 45 (to be described later), a swing motor 61 (to be described later), a lifting cylinder 41, and a slide. A second hydraulic pump P2 as a second working fluid supply source for supplying pressure oil to each of the cylinder 51 and the outrigger cylinder 7 and a cutter motor control valve 91 for controlling the driving of the cutter motor 45 are provided. Yes.

  In the apparatus main body 1, the swing motor 61, the elevating cylinder 41, the slide cylinder 51, and the outrigger cylinder 7 are incorporated as described above.

  The valve unit 10 is provided with an electromagnetic control valve for controlling the operation of each actuator excluding the cutter motor 45. Specifically, a swing motor control valve (swing drive means electromagnetic control valve) 11 for controlling the drive of the swing motor 61 and a lift cylinder control for controlling the lift cylinder 41 drive. Valve (electromagnetic control valve for lifting drive means) 12, slide cylinder control valve (sliding drive means electromagnetic control valve) 13 for controlling driving of the slide cylinder 51, and control of driving of the outrigger cylinder 7 An outrigger cylinder control valve (outrigger drive means electromagnetic control valve) 14 is provided.

  The cutter motor control valve 91 is connected to the discharge pipe 92 of the first hydraulic pump P1 and the return pipe 93 to the tank T, and the pressure oil from the first hydraulic pump P1 is cut through the external pipes 94 and 95. The motor 45 is configured to be supplied.

  On the other hand, the swing motor control valve 11, the lift cylinder control valve 12, the slide cylinder control valve 13 and the outrigger cylinder control valve 14 are composed of a discharge pipe 15a of the second hydraulic pump P2 and a return pipe 15b to the tank T ( The intermediate portions of the pipes 15a and 15b are connected in parallel to each other), and the pressure oil from the second hydraulic pump P2 is supplied to the swing motor 61, the lift cylinder 41, the slide cylinder 51, and the outrigger cylinder, respectively. 7 is configured to be supplied.

  The oil passages 12a and 12b communicated from the lift cylinder control valve 12 to the lift cylinder 41 and the oil passages on the discharge pipe 15a side and the return pipe 15b side have bypass oil paths 17a and 17b each having an electromagnetic valve 16. A bypass oil passage 19a provided with an electromagnetic valve 18 in the oil passages 14a and 14b communicated from the outrigger cylinder control valve 14 to the outrigger cylinder 7 and the oil passages on the discharge pipe 15a side and the return pipe 15b side. 19b is provided.

  The solenoid valves 16 and 18 are arranged at the right position by energization of the solenoid when energized to block the bypass oil passages 17a, 17b, 19a and 19b, and left when not energized due to disconnection of the electrical wiring. It is designed to switch to the position.

  When the solenoid valves 16 and 18 are switched to the left position as described above, the pressure oil is supplied to the rod side chambers 41a and 7a of the cylinders 41 and 7, thereby causing the cylinders 41 and 7 to degenerate. I try to let them.

  As described above, the working fluid supply source that supplies the pressure oil to each drive unit, the first hydraulic pump P1 that supplies the pressure oil only to the cutter motor 45 for rotationally driving the drilling blade 46, and the cutter motor 45 Since it comprises a swing motor 61, which is a driving means, a lifting cylinder 41, a slide cylinder 51, and a second hydraulic pump P2 that supplies pressure oil to the outrigger cylinder 7, the drilling blade 46 is rotationally driven like a conventional drilling device. During operation, for example, by operating the elevating cylinder 41, the supply of pressure oil to the cutter motor 45 is weakened, thereby causing the rotation of the cutter motor 45 to become unstable, and the lining material L of the drilling blade 46 It is possible to reliably prevent biting of the pipe and the like, and to avoid a significant decrease in efficiency of the pipe rehabilitation work.

  In addition, since the cutter motor control valve 91 for controlling the driving of the cutter motor 45 is provided in the vehicle-side hydraulic unit 9, the valve unit 10 connected to the punching device can be configured compactly. The workability of carrying in / out the pipe can be improved. Further, in the case where the cutter motor control valve 91 is provided in the valve unit 10 connected to the punching device, when the electric wiring connected to the valve unit 10 is disconnected, the punching device itself is placed in the pipe. However, if the cutter motor control valve 91 is provided on the vehicle side as described above, drilling will occur if an accident relating to the cutter motor control valve 91 occurs. There is no need for the troublesome work of unloading the apparatus itself from the pipe.

It is a hydraulic piping figure of the rehabilitation pipe punching device of the present invention. It is a longitudinal cross-sectional view which shows the use condition of the perforation apparatus in a buried pipe. It is A arrow enlarged view of FIG. It is a principal part expanded horizontal longitudinal cross-sectional view (BB line expanded sectional view of FIG. 2) of a punching apparatus. It is a principal part expanded vertical longitudinal cross-sectional view (CC line expanded sectional view of FIG. 4) of a punching apparatus. FIG. 6 is an enlarged sectional view taken along line D-D in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body 4 Punching part 41 Lifting cylinder 45 Cutter motor 46 Punching blade 6 Swing drive means 61 Swing cylinder 9 Hydraulic unit 91 Cutter motor control valve 10 Valve unit 11 Swing motor control valve 12 Lifting cylinder control valve

Claims (2)

The device body;
A drilling blade provided rotatably in the apparatus body;
A drilling blade driving means for driving the drilling blade to rotate;
Elevating drive means for moving the drilling blade up and down relative to the apparatus main body,
A rehabilitating tube punching device comprising swing driving means for swinging the punching blade left and right around the longitudinal axis of the device body,
A first working fluid supply source for supplying a working fluid to the drilling blade driving means, and a second working fluid supply source for supplying the working fluid to the lifting drive means and the swing driving means, respectively. Rehabilitation tube punching device.   Drilling for controlling the operation of the drilling blade drive means while being provided with an electromagnetic control valve for the lift drive means and an electromagnetic control valve for the swing drive means for controlling the operation of the lifting drive means and the swing drive means on the apparatus main body side. 2. The rehabilitation pipe punching device according to claim 1, wherein an electromagnetic control valve for blade driving means is provided on a vehicle side provided with a supply source for supplying a working fluid to each driving means.

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