JP2005009184A - Existing pipe replacing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve lower installation cost, easier material management and more efficient replacing work by stabilizing a weight balance without using a balance weight when lowering a replaced pipe portion to a predetermined connection position. <P>SOLUTION: A housing for covering the cutting and replacing work position of an existing pipe in a sealed condition is provided with a partition valve for separating its inside into an upper space and a lower space in a sealed condition and a connecting part 31 for a connected part 42 of the replaced pipe portion to be connected to the cut position of the existing pipe cut and removed by a cutter. Herein, a lift E is provided for lifting the connected replaced pipe portion between the upper space and the lower space and a lift-down position adjusting means F is provided for adjusting the horizontal lift-down position of the replaced pipe portion with respect to the lift E so that the gravity center position of the replaced pipe portion corresponds or almost corresponds to the lift-down position thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a housing that covers and cuts and replaces existing pipes such as water pipes in a sealed state, a gate valve that separates the inside of the housing into an upper space and a lower space in a sealed state, and a cutting device that is cut and removed. An existing lifting / lowering device is provided that includes a connecting portion for a connected portion of an exchange pipe portion connected to a cut portion of an existing pipe, and that raises and lowers the connected exchange pipe portion between an upper space and a lower space. It relates to tube exchange equipment.
[0002]
[Prior art]
Looking at the construction method with this kind of existing pipe replacement equipment, for example,
1) As shown in FIG. 1 (a), among water pipes 1 buried in the ground, which is an example of an existing pipe, cutting and replacing work of a water pipe portion located in a work pit P constructed of concrete or the like A cutting device A provided with a pair of left and right rotary cutting units 10 for feeding the cutting tool 9 to the tube axis X side while driving and rotating around the tube axis X is attached to a location, and a water supply including this cutting device A The lower cover 20 that covers the lower half side of the water pipe portion and the gate valve C that covers the upper half side of the water pipe portion, which are constituent members of the housing B that covers the cutting and exchanging work place of the pipe 1 in a sealed state. After attaching the upper cover 40, the gate valve C is closed and a water leakage test is performed.
[0003]
2) As shown in FIG. 1 (b), the upper tank 22 and the lid member 23 that constitute the upper space S1 are assembled to the upper portion of the upper cover 40 by other constituent members of the housing B, and the lid member 23 Is provided with an elevating cylinder shaft 30 into which an output shaft that is driven and rotated on a vertical line passing through the tube axis X of the water pipe 1 is inserted, and at the lower end of the elevating cylinder shaft 30 at the upper part of the cutting device A. The lifting device E is provided with a connecting portion 31 that is detachable with respect to the connected portion 42 provided on the upper portion of the T-shaped branch pipe joint D that is an example of the provided connected portion 13 or the exchange pipe portion. After attaching the case 32, the connecting portion 31 of the lifting device E and the connected portion 13 of the cutting device A are fixedly connected by bolts and nuts which are an example of fastening means.
In this fixed connection state, the output shaft of the lifting device E is detachably fitted to the input shaft of the cutting device A from above so that torque can be transmitted.
[0004]
3) As shown in FIG. 1 (c), power is transmitted from the drive motor 33 of the lifting device E to the pair of left and right rotary cutting units 10 via the output shaft and the input shaft, and a part of the water pipe 1 has a predetermined size. Then, the lifting device E is lifted by a crane or the like to raise the cutting device A holding the cutting / removing pipe portion 1A into the upper space S1 in the housing B and close the gate valve C. To do.
[0005]
4) As shown in FIG. 2 (d), the fixed connection between the upper tank 22 and the lid member 23 of the housing B is released, and the cutting device A is carried out to a predetermined location outside the housing B.
5) As shown in FIG. 2 (e), the lifting device E and the branch pipe joint D are assembled in advance to the lid member 23, and the assembled lid member 23 is fixedly connected to the upper tank 22 of the housing B.
6) As shown in FIG. 2 (f), the gate valve C is opened, and the branch pipe joint D suspended and supported by the elevating device E is lowered to a predetermined connection position in the lower space S2, and the water pipe Attached in advance to both the remaining pipe portions 1B of the water pipe 1 across the cut end portions of the two remaining pipe portions 1B and the connecting pipe portion 44 of the branch pipe joint D concentrically facing each other. The joint ring 2 is fitted and moved from the outside of the housing B to temporarily join the remaining pipe portions 1B of the water pipe 1 and the connecting pipe portion 44 of the branch pipe joint D. After the disassembly, the joint ring 2 is finally joined.
[0006]
The steps 1) to 6) are employed (see, for example, Patent Documents 1 and 2).
[0007]
Since the branch pipe part is integrally formed in the branch pipe joint D in the horizontal direction perpendicular to the pipe axis X of the water pipe 1, the center of gravity of the branch pipe joint D is connected to the pipe axis X of the water pipe 1. When the branch pipe joint D positioned in the upper space S1 in the housing B is lowered to a predetermined connection position in the lower space S2, the inner wall of the housing B is displaced to the front end side of the branch pipe portion with respect to the vertical line passing through. Even if an elevating guide means is provided between the branch pipe joint D and the branch pipe joint D, a twist may occur due to an offset load of the branch pipe joint D.
[0008]
Therefore, in the existing existing pipe replacement equipment, as shown in FIGS. 15 and 16, a cylindrical shape fixed so as to cover the periphery of the protruding shaft portion of the valve operating shaft 41 in the upper cover 40 of the branch pipe joint D. An intermediate connecting member 81 having a connecting cylinder shaft 81A that can be connected from below to the lower end portion of the lifting cylinder shaft 30 of the lifting device E is connected to the connected portion 42 by a fastening means such as a bolt and a nut. The bracket 83 for detachably attaching the balance weight 82 is fixed to the portion of the branch pipe joint D opposite to the branch pipe portion 43 by fastening means such as bolts and nuts.
[0009]
[Patent Document 1]
JP-A-56-55789
[Patent Document 2]
JP 56-83690 A
[0010]
[Problems to be solved by the invention]
In the conventional existing pipe replacement equipment, the branch pipe located in the upper space S1 in the housing B is provided by providing the bracket 83 of the branch pipe joint D with the balance weight 82 for correcting the offset load caused by the branch pipe portion 43. When the joint D is lowered to the predetermined connection position in the lower space S2, the branch pipe joint D can be reliably and smoothly lowered without being twisted, and the attitude of the branch pipe joint D is also maintained in the predetermined attitude. Therefore, the fitting movement operation of the joint ring 2 can also be performed reliably and smoothly.
[0011]
However, since the position of the center of gravity differs depending on the type of the branch pipe joint D, it is necessary to prepare the number of intermediate connecting members 81 and brackets 83 corresponding to the type, and the suspension load is equivalent to the bracket 83 and the balance weight 82. Therefore, the lifting device E and the like are increased in size, and the equipment cost is likely to increase.
[0012]
Furthermore, since it is necessary to use the intermediate connecting member 81 and the bracket 83 in accordance with the type of the branch pipe joint D, not only the material management is troublesome, but also the replacement work efficiency is likely to be lowered.
[0013]
The present invention has been made in view of the above-described problems, and its main purpose is to use a balance weight when lowering the exchange pipe portion located in the upper space in the housing to a predetermined connection position in the lower space. It is an object of the present invention to provide an existing pipe replacement facility that can stabilize the weight balance without reducing the equipment cost, facilitate material management, and improve the efficiency of replacement work.
[0014]
[Means for Solving the Problems]
In order to achieve this object, the first feature of the present invention is that a housing that covers the existing pipe cutting and exchanging work place in a sealed state, and a partition that separates the inside of the housing into an upper space and a lower space in a sealed state. A connecting portion for connecting a connected portion of a valve and a replacement pipe portion connected to a cutting portion of an existing pipe cut and removed by the cutting device, and the connected replacement pipe portion spans an upper space and a lower space; It is an existing pipe exchange facility provided with a lifting device for raising and lowering,
There is provided a suspension position adjusting means for adjusting the suspension position in the horizontal direction of the exchange pipe portion with respect to the lifting device so that the gravity center position and the suspension position of the exchange pipe portion are matched or substantially matched. is there.
[0015]
According to the above characteristic configuration, even when the position of the center of gravity differs depending on the type of the exchange pipe part, the suspension position adjusting means is adapted to the horizontal variation in the distance from the suspension position of the lifting device to the center of gravity position of the exchange pipe part. By adjusting the horizontal suspension position of the exchange pipe portion with respect to the lifting device, the gravity center position and the suspension position of the exchange pipe portion can be matched or substantially matched. Even if the raising / lowering guide means is provided between the pipe part and the pipe part, the exchange pipe part can be surely and smoothly lowered while maintaining the predetermined posture with little or no twist.
[0016]
Accordingly, the weight balance of a plurality of types of exchange pipe parts with different positions of the center of gravity can be adjusted with one hanging position adjusting means, thereby reducing the equipment cost, facilitating material management and improving the efficiency of the exchange work. Can be planned.
[0017]
The 2nd characteristic structure by the existing pipe replacement equipment of this invention exists in the point to which the said suspension position adjustment means is provided between the connection part of the raising / lowering apparatus and the to-be-connected part of an exchange pipe part.
[0018]
According to the above characteristic configuration, the suspension position adjusting means is assembled to the connected portion of the exchange pipe portion that is at a low ground position outside the housing, and according to the horizontal distance from the center of gravity position of the exchange pipe portion to the suspension position. After adjustment in advance, it is only necessary to connect the connecting portion of the lifting device to the adjusted hanging position adjusting means.
[0019]
Therefore, as compared with the case where the hanging position adjusting means is assembled to the upper and lower intermediate portions of the lifting device, not only can the structure be simplified and the equipment cost can be reduced, but also the hanging position adjusting means can be assembled. It is possible to improve the efficiency of attaching work and adjusting work.
[0020]
According to a third characteristic configuration of the existing pipe exchanging equipment of the present invention, the housing is arranged such that the center of gravity of the exchanging pipe part and the raising / lowering center position of the lifting / lowering device match or substantially match the mounting portion of the housing and the lifting / lowering device. There is an attachment position changing means for adjusting the attachment position in the horizontal direction of the lifting device.
[0021]
According to the above characteristic configuration, even when the position of the center of gravity differs depending on the type of the exchange pipe part, the mounting position is changed in accordance with the distance variation in the horizontal direction from the lifting center position of the lifting device to the housing to the center of gravity position of the exchange pipe part. By adjusting the horizontal mounting position of the lifting device with respect to the housing by means, the center of gravity position of the exchange pipe portion and the mounting position of the lifting device can be matched or substantially matched. For example, replacement with the inner wall of the housing Even if the raising / lowering guide means is provided between the pipe part and the pipe part, the exchange pipe part can be surely and smoothly lowered in a predetermined posture with little or no twisting.
[0022]
Accordingly, it is not necessary to prepare a plurality of types of housing cover members having different mounting positions of the lifting device, and a single mounting position changing means can be used to cope with a plurality of types of exchange pipe sections having different positions of the center of gravity. Therefore, it is possible to promote the reduction of equipment cost, the ease of material management and the improvement of workability.
[0023]
The 4th characteristic structure by the existing pipe | tube exchange equipment of this invention is comprised so that the connection part of the said raising / lowering device is detachable with respect to the to-be-connected part of a cutting device, and was connected with the connection part of this raising / lowering apparatus. The cutting device is configured to move up and down over the upper space and the lower space, and an output shaft for transmitting power to the cutting device is inserted into the lifting cylinder shaft of the lifting device. .
[0024]
According to the above characteristic configuration, since the suspension position adjusting means and the attachment position changing means are equipped, the attachment position of the lifting device with respect to the housing is determined from the position of the center of gravity of the exchange pipe portion from the vertical line passing through the tube axis of the existing pipe. It can be changed freely over the range up to and including the one type of lifting device and can be lifted and lowered by either the exchange pipe part or the cutting device, and the weight balance when the cutting device is suspended can be adjusted. It can be implemented with a simple modification of a part of the power transmission system.
[0025]
According to a fifth characteristic configuration of the existing pipe replacement facility of the present invention, the suspension position adjusting means is connected to the first adjustment connecting member connected to the connected part of the exchange pipe part and the connecting part of the lifting device. A second adjustment connecting member, and the first adjustment connecting member is provided with a sliding guide portion that slides and guides the second adjustment connecting member along the horizontal direction. An adjustment operation mechanism for sliding the adjustment connection member and a fixing mechanism for fixing the second adjustment connection member at an arbitrary position in the suspension position adjustment operation region with respect to the first adjustment connection member are provided.
[0026]
According to the above characteristic configuration, the first adjustment connecting member is connected to the connected portion of the exchange pipe portion located at the lower ground position outside the housing, and the adjustment operation mechanism, the fixing mechanism, and the second adjustment member are connected to the first adjustment connecting member. The adjustment connecting member is assembled, and the mounting position in the horizontal direction of the second adjustment connecting member relative to the first adjustment connecting member according to the horizontal distance from the gravity center position of the exchange pipe portion to the hanging position is set to the sliding guide portion. Then, the adjustment operation mechanism adjusts, and both adjustment connecting members are fixed by the fixing mechanism at the adjustment position, and then the connecting portion of the lifting device is connected to the second adjustment connecting member.
[0027]
Therefore, not only can the suspension position adjusting means be simplified and the equipment cost can be reduced, but also the work of assembling and adjusting the suspension position adjusting means can be improved.
[0028]
According to a sixth characteristic configuration of the existing pipe replacement facility of the present invention, the mounting position changing means includes a movable base having a mounting seat for the lifting device, and the movable base along the horizontal direction with respect to the lid member of the housing. A sliding guide portion that is slidably guided, a position changing operation mechanism that slides the movable base along the sliding guide portion, and a movable base at an arbitrary position in the mounting position changing operation area with respect to the sliding guide portion. It is in the point comprised from the fixing mechanism which fixes.
[0029]
According to the above characteristic configuration, even when the position of the center of gravity differs depending on the type of the exchange pipe part, the change operation mechanism is changed by a distance corresponding to the distance variation in the horizontal direction from the elevation center position of the lifting device to the center of gravity position of the exchange pipe part. To adjust the mounting position of the movable base to which the lifting / lowering device is fixed along the sliding guide portion provided on the lid member of the housing, so that the center of gravity position of the exchange pipe portion and the lifting / lowering of the lifting / lowering device are adjusted. Since the center position can be matched or substantially matched, even if a lifting guide means is provided between the inner wall of the housing and the exchange pipe part, the exchange pipe part has a predetermined posture with little or no twisting. Can be lowered reliably and smoothly.
[0030]
Accordingly, with one mounting position changing means, it is possible to cope with a plurality of types of exchange pipe parts having different positions of the center of gravity, and the main parts of the mounting position changing means are a movable base, a sliding guide part, a change operation mechanism, Since it is composed of a fixing mechanism, it is possible to promote reduction in equipment cost, ease of material management, and improvement in workability.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
3 to 14 show details of the present invention in the existing pipe exchanging equipment outlined in FIG. 1 and FIG. 2, and are a T-shaped branch pipe joint as an example of the connecting part 31 of the lifting device E and the exchanging pipe part. The branch pipe joint with respect to the lifting device E so that the gravity center position of the branch pipe joint D and the suspension center position (lifting center position) of the lifting device E match or substantially match with the connected portion 42 of D. Hanging position adjusting means F for adjusting the hanging position of D in the horizontal direction is provided, and the attachment portion between the cover member 23 of the housing B and the case 32 of the lifting device E is provided with a branch pipe joint D. Mounting position changing means G for adjusting the mounting position of the lifting device E in the horizontal direction with respect to the housing B is provided so that the position of the center of gravity and the lifting center position of the lifting device E match or substantially match.
[0032]
The housing B will be described in detail. Of the water pipes 1 buried in the ground as an example of the existing pipes, the lower half of the water pipe section cutting / replacement work position located in the work pit P constructed of concrete or the like. The upper flange portion 20A of the lower cover 20 covering the side and the lower flange portion 21A of the upper cover 21 covering the upper half side of the water pipe portion are fixedly connected by fastening means such as bolts and nuts. A lower flange portion 50A of the valve case 50 of the gate valve C is fixedly connected to the upper flange portion 21B by fastening means such as bolts and nuts, and the cutting device A is connected to the upper flange portion 50B of the valve case 50. Alternatively, the lower flange portion 22A of the upper tank 22 forming the upper space S1 in which the branch pipe joint D can be accommodated is fixedly connected by fastening means such as bolts and nuts, and the upper tank 22 The upper flange portion 22B, the lower flange portion 23A of the lid member 23 is detachably fixed connection by a fastening means such as bolts and nuts.
[0033]
Further, in the inner wall surface of the housing B, the first guide having a substantially convex cross section provided on both side portions of the cutting device A is provided in a portion facing the tube axis X of the water pipe 1 in the horizontal direction. A guide rail 53 is provided for slidingly guiding the second guide part 52 provided on both sides of the part 51 or the branch pipe joint D along the vertical direction in the engaged state. The 1 guide part 51 or the 2nd guide part 52, and the guide rail 53 comprise the raising / lowering guide means which moves and guides the cutting device A or the branch pipe joint D to an up-down direction.
[0034]
The cutting device A will be described in detail. An elevating cylinder of the elevating device E is provided on the upper portion of the guide support portion 5 divided into a plurality in the circumferential direction so that it can be attached to the cutting and exchanging work place of the water pipe 1 from the outside. An input shaft 6 that is detachably fitted from below in a state where torque can be transmitted to the lower end portion of the output shaft 34 inserted through the shaft 30, and is parallel to the tube axis X of the water pipe 1 in conjunction therewith. A transmission case 8 provided with a pair of drive sprockets 7 that rotate around a center axis is provided, and on both sides of the guide support portion 5 in the tube axis X direction along the outer peripheral surface of the water pipe 1. A pair of left and right rotary cutting units 10 for feeding the cutting tool 9 to the tube axis X side while being driven to rotate around the tube axis X are disposed. Further, the passive sprocket 11 and the drive sprocket 7 of each rotary cutting unit 10 are provided. Across the drive chain 2 is wound.
[0035]
The elevating device E will be described in detail. As shown in FIGS. 3 to 5, 8, and 12, the cylindrical case 32 having a mounting flange portion 32 </ b> A for mounting on the lid member 23 side of the housing B includes: An elevating cylinder shaft 30 that supports the output shaft 34 so as to be relatively rotatable in a concentric state is inserted and held so as to be slidable only in the vertical direction, and a cylinder provided with a connecting flange portion 31A at the lower end of the elevating cylinder shaft 30. And a drive motor 33 with a speed reduction mechanism that is linked to the output shaft 34 via a cylindrical transmission case 36 provided with a suspension bracket 35 at the upper end of the lifting cylinder shaft 30. Is installed.
[0036]
As shown in FIG. 12, the lower flange portion 36A of the cylindrical transmission case 36 has a cutting device A at a predetermined cutting position in the lower space S1, or a branch pipe joint D in the lower space S1. The connecting flange portion 37A of the cylindrical transmission cover 37 that is externally fitted to the case 32 is fixedly connected by fastening means such as bolts and nuts, and the transmission cover 37 is connected to the case 32 at the predetermined connection position. A bolt 38 for tightening and fixing is screwed so as to be detachable.
[0037]
The branch pipe joint D will be described in detail. As shown in FIGS. 6 to 9, the connection pipe portion 44 connected to the ends of both the remaining pipe portions 1 </ b> B of the water pipe 1 and the tube axis X are connected. An upper cover 40 that penetrates and supports the valve operating shaft 41 of the valve body is fastened to the upper flange portion 45A of the valve box 45 having a branch pipe portion 43 that integrally protrudes in an orthogonal horizontal direction. The lower flange portion 42A of the tubular connected portion 42 that covers the periphery of the protruding shaft portion of the valve operating shaft 41 is connected to the connecting seat 40A of the upper cover 40 such as a bolt and a nut. It is fixedly connected by fastening means.
[0038]
A bracket 46 is fixedly connected to the connecting flange portion 43A of the branch pipe portion 43 by fastening means such as bolts and nuts in a state where the opening of the branch pipe portion 43 is vertically cut. A second guide portion 52 is attached to each of the mounting seats 47 protruding from the side wall of the valve box 45 located on the opposite side, and a plurality of locations on the bottom wall portion of the valve box 45 are shown in FIG. A leg member 48 that is stably supported by a receiving seat 56 provided on a base 55 of the assembly jig H shown is provided.
[0039]
At a plurality of locations on the base 55 of the assembly jig H, support columns 57 that support the lid member 23 are provided. In the assembly jig H installed outside the housing B, the lifting device E and the branch pipe joint are attached to the lid member 23. D is configured to be assembled in advance.
[0040]
The suspension position adjusting means F will be described in detail. As shown in FIGS. 9 and 12 to 14, the projecting shaft portion of the valve operating shaft 41 is provided on the upper flange portion 42 </ b> B of the connected portion 42 of the branch pipe joint D. A lower flange portion 60B of the first adjustment connecting member 60 having a cylindrical portion 60A that can be inserted is fixedly connected by fastening means such as a bolt 58 and a nut 59, and the connection portion 31 of the lifting device E is connected. In the flange portion 31A, an upper flange portion 61B of the second adjustment connecting member 61 provided with a cylindrical portion 61A in which a transmission cylinder shaft 39 attached to the lower end portion of the output shaft 34 can enter is provided with a bolt 58, a nut 59, and the like. The connection guide is fixedly connected by the fastening means, and is fixed over the upper ends of the cylindrical portion 60A and the plurality of reinforcing plates 60C disposed around the cylindrical portion 60A by the constituent members of the first adjustment connection member 60. Plate 60D; (2) A connecting guide plate 61D, which is a constituent member of the adjustment connecting member 61 and is fixed to the lower end of the plurality of reinforcing plates 61C disposed around the cylindrical portion 61A, and includes a plurality of bolts 62 and nuts. It is comprised by the fastening means which consists of 63 so that fixed connection is possible.
[0041]
In addition, the connection guide plate 60D of the first adjustment connection member 60 has a center of gravity position variation direction of a plurality of types of branch pipe joints D, in other words, the axial center direction of the branch pipe portion 43 perpendicular to the pipe axis X. A sliding guide portion 60E that slides and guides the connection guide plate 61D of the second adjustment connection member 61 is integrally formed along the bolt insertion hole formed in the connection guide plate 61D of the second adjustment connection member 61. 64 is configured as a round hole that is slightly larger than the nominal diameter of the bolt 62, and the bolt insertion hole 65 formed in the connection guide plate 60 </ b> D of the first adjustment connection member 60 is located at the center of gravity of at least a plurality of types of branch pipe joints D. In the fluctuation range (hanging position adjusting operation range), the adjusting coupling members 60 and 61 are formed into long holes that allow relative sliding.
[0042]
Further, the adjustment operation mechanism 66 for sliding the second adjustment connecting member 61 with respect to the first adjusting connecting member 60 will be described in detail. A female screw member 66B screwed with an adjustment operation bolt 66A in a horizontal posture along the hanging position adjustment direction is fixed to the center position in the width direction, and is fixed to the connection guide plate 61D of the second adjustment connection member 61. The receiving member 66C to which the small-diameter tip portion 66a of each adjusting operation bolt 66A is engaged is rotatably fixed.
[0043]
The center of gravity of the branch pipe joint D is matched or substantially matched by the screwing operation of the two adjusting operation bolts 66A, in other words, the center of gravity of the branch pipe joint D. The second adjustment link 60 is connected to the connection guide plate 60D so that the suspension center line that is the cylinder axis of the cylindrical portion 61A of the second adjustment connection member 61 is positioned or substantially positioned on the vertical line passing through the position. The suspension connection position in the horizontal direction of the connection guide plate 61 of the adjustment connection member 61 is adjusted.
[0044]
The fixing mechanism 67 for fixing the second adjustment connecting member 61 at an arbitrary position in the hanging position adjusting operation region with respect to the first adjusting connecting member 60 is a plurality of pairs for fixing and connecting both the connecting guide plates 60D and 61D. It comprises a bolt 62, a nut 63, both adjusting operation bolts 66A constituting the adjusting operation mechanism 66, and a receiving member 66C.
[0045]
Further, among the reinforcing plates 61C of the second adjustment connecting member 61, a suspension bracket 68 having a suspension hole 68a for suspension is fixed to each of the upper ends of the pair of reinforcing plates 61C opposed to each other in the radial direction. Has been.
[0046]
The attachment position changing means G will be described in detail. As shown in FIGS. 9 to 12, a water pipe is attached to the upper end of an annular reinforcing frame 69 provided in a state of penetrating vertically in the center of the lid member 23 of the housing B. 1 includes an opening 70a that allows horizontal movement of the elevating device E over a movable region from a vertical line Y passing through the tube axis X of 1 to a center of gravity position variation range (hanging position adjusting operation range) of the branch pipe joint D. The plate-like movable base 71 that is fixed to the sliding guide plate 70 and slides along the upper surface of the sliding guide plate 70 while maintaining the sealed state of the housing B is provided on the cylindrical case of the lifting device E. When the mounting seat 71a for mounting the mounting flange portion 32A of the 32 with a fastening means such as a bolt and the lifting cylinder shaft 30 of the lifting device E are pulled up to the maximum lifted position by a crane or the like, the upper and lower ends of the connecting portion 31 Contact from direction Stopper cylinder 72 is provided that.
[0047]
Further, the sliding guide plate 70 includes a movable base along the direction of center of gravity variation of the plurality of types of branch pipe joints D, in other words, along the axial direction Z of the branch pipe portion 43 that is orthogonal to the pipe axis X. A pair of sliding guide members 73 having a substantially inverted L-shaped cross section for slidingly guiding the base 71 are attached by fastening means such as first bolts 74, and each sliding guide member 73 has a sliding guide plate. A second bolt 75 constituting a fixing mechanism for fixing the movable base 71 at an arbitrary position in the movable area including the attachment position changing operation area is screwed to 70, and the sliding guide plate 70 and both The sliding guide member 73 constitutes a sliding guide portion that guides the movable base 71 slidably along the horizontal direction with respect to the lid member 23 of the housing B.
[0048]
The position changing operation mechanism 76 that slides the movable base 71 along the sliding guide plate 70 and the both sliding guide members 73 will be described in detail. The mounting is performed across the bearing members 76A provided at two positions of the lid member 23. A screw shaft 76C with an operation handle 76B is installed in a horizontal posture along the position changing direction (axial center direction Z of the branch pipe portion 43) so as to be rotatable only, and a screw piece member 76D screwed into the screw shaft 76C. Is held in a state in which relative rotation is impossible with a holder 76E provided at the lower end of the movable base 71.
[0049]
When the branch pipe joint D located in the upper space S1 of the housing B is lowered to a predetermined connection position between the two remaining pipe portions 1B of the water pipe 1, the position of the center of gravity of the branch pipe joint D is raised and lowered. In other words, the suspension center line that is the cylinder axis of the stopper cylinder 72 is placed on the vertical line passing through the center of gravity of the branch pipe joint D so that the position of the elevation center of the lifting cylinder shaft 30 of the apparatus E matches or substantially matches. The operating handle 76B is rotated so that the position of the movable base 71 is approximately or substantially positioned to change the mounting position of the movable base 71 within the mounting position changing operation region with respect to the sliding guide plate 70.
[0050]
Further, when the cutting device A attached to the water pipe 1 is used to cut the cutting portion of the water pipe 1 or to raise the cutting device A holding the cut and removed pipe portion 1A into the upper space S1, the water pipe In other words, the vertical line passing through the pipe axis X of the water pipe 1 so that the vertical line Y passing through the pipe axis X of 1 and the vertical center position of the lifting cylinder shaft 30 of the lifting device E match or substantially match. The operating handle 76B is rotated so that the suspension center line that is the cylinder axis of the stopper cylinder 72 is positioned or substantially positioned on Y, and the movable base 71 is moved within the movable area with respect to the sliding guide plate 70. Change the mounting position.
[0051]
[Other Embodiments]
(1) In the first embodiment described above, the cutting device A is provided with a pair of left and right rotary cutting units 10 for feeding the cutting tool 9 to the tube axis X side while driving and rotating around the tube axis X. However, the present invention is not limited to this, and the cutting device A having any structure can be used as long as a part of the existing pipe can be cut and removed while the exchange pipe part D such as a branch pipe joint can be connected. Also good.
[0052]
(2) In the first embodiment described above, the gravity center position and the suspended position (suspended center position) of the branch pipe joint D between the coupling part 31 of the lifting device E and the coupled part 42 of the branch pipe joint D. The suspension position adjusting means F that adjusts the suspension position of the branch pipe joint D in the horizontal direction with respect to the lifting device E is configured so that the suspension position adjustment means F matches or substantially matches. You may comprise in the middle of the raising / lowering cylinder shaft 30 of the apparatus E. FIG.
[0053]
(3) The hanging position adjusting means F is not limited to the position adjusting structure using the bolt as in the first embodiment, but at least the gravity center position and the hanging position (the hanging center) of the branch pipe joint D. Other structures such as an electric type and a hydraulic type can be used as long as the hanging position in the horizontal direction of the branch pipe joint D with respect to the lifting device E can be adjusted within a range that can match or substantially match the position). May be used.
[0054]
(4) The attachment position changing means G is not limited to the attachment position changing structure using the screw shaft 76C as in the first embodiment described above, and at least the gravity center position of the branch pipe joint D and the raising / lowering of the lifting device E. As long as the mounting position in the horizontal direction of the lifting device E with respect to the housing B can be adjusted within a range in which the center position can be matched or substantially matched, another structure such as an electric type or a hydraulic type can be used. It may be used.
[0055]
(5) In the first embodiment described above, a branch pipe joint is used as the exchange pipe part D, but other exchange pipe parts D such as an expansion / contraction flexible pipe joint and a fire hydrant may be used.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 (a) to (c) are schematic cross-sectional side views showing a process of cutting a water pipe by an existing pipe exchange facility.
[Fig. 2] (D) to (F) are schematic cross-sectional side views showing the installation process of the branch pipe joint by the existing pipe exchange equipment.
FIG. 3 is a cross-sectional front view showing a water pipe cutting process by the existing pipe replacement equipment of the present invention.
FIG. 4 is a cross-sectional front view of the cutting device that holds the cutting and removing pipe portion when it is raised into the upper space.
FIG. 5 is an enlarged cross-sectional front view showing a connecting structure between the lifting device and the cutting device.
FIG. 6 is a front view when a branch pipe joint is assembled with an assembly jig.
FIG. 7 is a cross-sectional front view when the branch pipe joint assembled in the housing is mounted.
FIG. 8 is a cross-sectional front view when the branch pipe joint is lowered to a predetermined connection position.
FIG. 9 is an enlarged cross-sectional front view showing a connection structure between the lifting device and the branch pipe joint.
FIG. 10 is a plan view of mounting position changing means.
FIG. 11 is a sectional front view of the attachment position changing means.
FIG. 12 is an enlarged cross-sectional side view of the mounting position changing means and the hanging position adjusting means.
FIG. 13 is an enlarged exploded perspective view of a hanging position adjusting means.
FIG. 14 is an enlarged perspective view of a hanging position adjusting means.
FIG. 15 is an enlarged front view of the main part showing a conventional existing pipe replacement facility.
FIG. 16 is a cross-sectional front view when a branch pipe joint is lowered to a predetermined connection position using a conventional existing pipe replacement equipment.
[Explanation of symbols]
A cutting device
B housing
C Gate valve
D Exchange pipe section (branch pipe joint)
E Lifting device
F Hanging position adjustment means
G Mounting position change means
X Tube core
S1 Upper space
S2 Lower space
1 Existing pipe (water pipe)
13 Connected part
23 Lid member
30 Elevating cylinder axis
31 connecting part
34 Output shaft
42 Connected part
60 first adjustment connecting member
60E Sliding guide part
61 Second adjustment connecting member
66 Adjusting operation mechanism
67 Fixing mechanism
70 Sliding guide (sliding guide plate)
71 Movable base
71a Mounting seat
73 Sliding guide part (sliding guide member)
75 Fixing mechanism (second bolt)
76 Position change operation mechanism

Claims (6)

It is connected to a housing that covers the existing pipe cutting and exchanging work place in a sealed state, a gate valve that separates the inside of the housing into an upper space and a lower space in a sealed state, and a cutting portion of the existing pipe that has been cut and removed by the cutting device. An existing pipe exchanging facility provided with an elevating device for raising and lowering the connected exchange pipe part over the upper space and the lower space.
Existing pipe provided with hanging position adjusting means for adjusting the horizontal position of the exchange pipe portion relative to the lifting device so that the gravity center position and the hanging position of the exchange pipe portion coincide or substantially coincide with each other. Replacement equipment. The existing pipe replacement equipment according to claim 1, wherein the suspension position adjusting means is provided between a connecting part of the lifting device and a connected part of the replacement pipe part. Mounting position for adjusting the mounting position of the lifting device in the horizontal direction with respect to the housing so that the center of gravity position of the exchange pipe portion and the lifting center position of the lifting device match or substantially match the mounting portion of the housing and the lifting device. The existing pipe replacement equipment according to claim 1 or 2, wherein a changing means is provided. The connecting portion of the lifting device is configured to be detachable from the connected portion of the cutting device, and the cutting device connected to the connecting portion of the lifting device is raised and lowered over the upper space and the lower space. The existing pipe replacement equipment according to claim 3, wherein an output shaft for transmitting power to the cutting device is inserted into the lifting cylinder shaft of the lifting device. The hanging position adjusting means includes a first adjustment connecting member connected to the connected portion of the exchange pipe portion, and a second adjustment connecting member connected to the connecting portion of the lifting device. Includes a slide guide portion that slides and guides the second adjustment connecting member along the horizontal direction, an adjustment operation mechanism that slides the second adjustment connecting member relative to the first adjustment connecting member, and a first adjustment. The existing pipe replacement equipment according to claim 2, further comprising a fixing mechanism for fixing the second adjustment connecting member at an arbitrary position in the suspension position adjusting operation region with respect to the connecting member. The mounting position changing means includes a movable base having a mounting seat for the lifting device, a sliding guide portion for slidably guiding the movable base along the horizontal direction with respect to the lid member of the housing, and 4. A position changing operation mechanism for sliding the movable base along the sliding base and a fixing mechanism for fixing the movable base at an arbitrary position in the mounting position changing operation area with respect to the sliding guide portion. Existing pipe replacement equipment.

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