JP4678781B2 - Pipe drilling machine and pipe drilling method - Google Patents

Description

  The present invention relates to a pipe drilling machine and a pipe drilling method, and more specifically, a drilling machine main body having a drilling tool at the tip of a shaft, a feed device for moving the shaft forward and backward, and a driving means for driving the drilling tool at the tip of the shaft. The present invention relates to a pipe drilling machine and a pipe drilling method that can be mounted in a watertight manner on a gate valve device.

  When forming a branch pipe from the middle of an existing fluid pipe such as a water pipe, a gate valve device is connected, and a pipe punch is connected to the gate valve, and a hole is drilled in the existing pipe by the continuous water method. After that, a method of attaching a branch pipe is frequently used (for example, Patent Document 1). This is because it is not necessary to cut off the water when forming the branch pipe, which is highly convenient for tap water users.

  When a branch pipe is formed on an existing pipe by the continuous water method, generally, as shown in FIGS. 10 and 11, a gate valve device (hereinafter sometimes referred to as “gate valve”) is used. That is, the split T-shaped branch case 51 is externally fitted and mounted in a watertight state with respect to the outer peripheral portion of the existing pipe K. And in order to connect the branch case 51 and the gate valve 52, the flange part 51a of the branch case 51 and the flange 52a of the gate valve 52 are connected with a volt | bolt and a nut.

  Next, in order to connect a pipe punching machine (hereinafter also referred to as a punching machine) 53 to the other end side of the gate valve 52, a flange 52b on the other end side of the gate valve 52 and a flange portion 53a of the punching machine 53 are connected. Secure with bolts and nuts. After mounting the punching machine 53, the valve body of the gate valve 52 is withdrawn upward to open the interior of the gate valve 52 into a communicating state, and a predetermined portion of the existing pipe K is punched by the punching machine 53.

  Although not shown in the figure, the drilling machine 53 includes a cylindrical hole saw provided with a cutting edge at the tip, and a center drill located at the center of the cylinder and protruding forward from the cutting tip of the hole saw. Yes. Then, the handle 54 provided on the rear stage side of the drilling machine 53 is rotated to feed the hole saw to the existing pipe K side, and the existing pipe is rotated while rotating the hole saw and the center drill by a separately provided drive motor (not shown). Drill a predetermined portion of K.

  When the drilling is completed, the rotation of the hole saw is stopped, and the drilling machine 53 is moved backward while rotating the handle 54 in the reverse direction. A part of the cut off existing pipe is caught and discharged by the center drill as the drilling machine 53 moves backward.

  When the hole saw and the center drill are sufficiently retracted, the valve body of the gate valve 52 that has been retracted upward is lowered to close the communication state. Thereafter, as shown in FIG. 11, the perforator 53 is removed, and the flange portion 52b of the gate valve 52 and the flange 56a of the connection pipe 56 provided with the receiving port are connected by bolts and nuts instead. The distal end of the branch pipe 55 is inserted into the receiving port of the pipe 56 to terminate the connection, and the branch pipe 55 can be used.

JP 2002-154004 A

  When using a branch case provided with a receiving port in the branch part, the overall length is longer than in the case where a flange is provided in the branch part, and the pit excavation range near the branch pipe is widened. In that case, the feed amount of the drilling machine is constant depending on the type of the drilling machine, so it is necessary to use a larger drilling machine, resulting in an increase in energy consumption and an increase in equipment costs, resulting in higher construction costs. There is a problem. Not only when connecting pipes with a receiving port are used, there has been a strong demand for reducing the drilling range in the vicinity of the branch pipe, and there is a strong demand for using a small drill with less energy consumption. .

  Therefore, an object of the present invention is to provide a pipe drilling machine and a pipe drilling method that can reduce the excavation range near the branch pipe or consume less energy.

The above-mentioned subject is achieved by the invention described in each claim. That is, the characteristic configuration of the pipe drilling machine according to the present invention includes a drilling machine main body having a drilling tool at the shaft tip, and a feed device for moving the shaft forward and backward and a driving means for driving the drilling tool at the shaft tip. In addition, in a pipe punching machine that can be attached to the gate valve device in a watertight manner, the pipe punching device can be connected to the gate valve device, and has an adapter that supports the punching machine main body at a position to be separated from the gate valve device, and connected to the shaft And extending means for extending the shaft length, slidably and stopably connected to the adapter interposed between the drilling machine body and the adapter, and supporting the drilling machine body, It has a bearing member that supports the drilling machine main body at a position to be separated from the gate valve device, and this bearing member is fitted to the extension means and watertightly fitted to the adapter, By advancing and retracting the bearing member, the extension means on which the bearing member is fitted can be moved forward and backward, and is fitted on the outer peripheral surface of the tip end side of the bearing member and can be inscribed on the inner peripheral surface of the adapter. And a centering means incorporating a biasing means, and the centering means slides the bearing member in a direction toward the gate valve device after the adapter is mounted on the gate valve device. Thus, the shaft is centered in contact with the inner peripheral surface of the gate valve device.

  According to this configuration, by extending the shaft length, it is possible to increase the feeding amount as compared with the prior art drilling machine, and it is possible to support the drilling machine main body at a position to be separated from the gate valve device by the action of the adapter. Therefore, the gate valve operation can be performed reliably. In this way, using a smaller drilling machine than conventional ones, it is possible to realize a feed amount equivalent to that of a larger drilling machine, so that the pit excavation range can be made smaller and the weight can be reduced, so that the transport device is also Not only a smaller one is required, but also the workability when the pipe drilling method is carried out is improved. In addition, when connecting with the gate valve apparatus, the pipe | tube punching machine of this invention may be connected not only through the gate valve apparatus but through the intermediate member connected to this.

  As a result, the excavation range near the branch pipe can be further reduced, and furthermore, a pipe drilling machine with less energy consumption can be provided.

As described above, the pipe punching machine according to the present invention is interposed between the drilling machine main body and the adapter so as to be slidably and stopably connected to the adapter, and supports the drilling machine main body, It has a bearing member that supports the drilling machine main body at a position where it is separated from the gate valve device, and this bearing member is fitted on the extension means and watertightly fitted on the adapter, and the bearing member is advanced and retracted. By doing so, the extension means with which the bearing member is fitted can be moved forward and backward .

  According to this configuration, since the drilling machine main body can be supported reliably and stably via the bearing member, workability is improved when drilling an existing pipe having a relatively small diameter.

As described above, the pipe punching machine according to the present invention is fitted on the outer peripheral surface of the tip end side of the bearing member, and can be inscribed in the inner peripheral surface of the adapter, and includes a centering means incorporating a biasing means. The centering means, after mounting the adapter on the gate valve device, slides the bearing member in a direction toward the gate valve device, thereby allowing the inner peripheral surface of the gate valve device to And the shaft is centered.

  According to this configuration, since the centering means that incorporates the biasing means is used in particular, it is possible to reliably prevent the possibility of deviation of the drilling position and enable accurate drilling.

  The connection that allows the adapter and the bearing member to slide and stop is inserted into the screw member insertion holes provided in the vicinity of the outer peripheral portions of the adapter and the bearing member, and a plurality of nut members are connected to the screw member. The adapter and the bearing member are stopped by sliding the bearing member through the screw member and acting as a lock nut on one of the nut members that can be screwed onto the screw member. It is preferable to make it.

  According to this configuration, the drilling machine main body can be stopped with a simple configuration, and the drilling operation can be performed in a stable state.

  In addition, the characteristic configuration of the pipe drilling method according to the present invention is that the gate valve device is connected to an existing pipe, and the pipe puncher according to any one of claims 1 to 4 is connected to the gate valve device. The purpose is to drill a predetermined part of the tube.

  According to this configuration, the excavation range in the vicinity of the branch pipe can be made smaller, or a pipe drilling method with less energy consumption can be provided.

  An embodiment of a pipe punching machine and pipe punching method according to the present invention will be described in detail with reference to the drawings, taking as an example the case of connecting a branch pipe to an existing water pipe.

<First Embodiment>
1 to 3 show a pipe punching method in which a branch pipe is connected to an existing pipe K having a relatively small diameter (about 75 to 600 mm diameter) using the pipe punching machine according to the first embodiment.

  This pipe punching machine can be attached to the gate valve 2 in a watertight manner. In FIG. 1, a seal valve 11 is interposed in a gate valve (shown in phantom) 2 having a receiving portion, and bolts and nuts are inserted. The front partial cross section structure which attached and connected the pipe drilling machine with the fastener (illustration omitted) is shown.

  Further, this pipe drilling machine has a cylindrical hole saw (corresponding to a drilling tool) 13 and a center drill (corresponding to a drilling tool) 22 at the tip of the shaft 12 and a manual feed with a handle 15 for moving the shaft 12 forward and backward. A drilling machine body A having a device 14 and a driving part M for connecting a motor (corresponding to a driving means) for rotationally driving the hole saw 13 and the center drill 22 at the tip end of the shaft 12 and the gate valve 1 can be connected. It has an adapter 16 that supports the main body A at a position for separating it from the gate valve 2, and an extension sleeve (corresponding to an extension means) 17 that is connected to the shaft 12 and extends the shaft length.

  Between the drilling machine main body A and the adapter 16, a bearing member 18 that is slidably and stopably connected to the adapter 16 is disposed. The bearing member 18 supports the drilling machine main body A at a position where the drilling machine main body A is separated from the gate valve 2. Then, the bearing member 18 is fitted on the extension sleeve 17 and is fitted on the adapter 16 in a watertight manner, and the bearing member 18 is advanced and retracted, so that the extension sleeve 17 on which the bearing member 18 is fitted can be advanced and retracted. Reference numeral 25 denotes a sealing material for the bearing member 18 to be fitted into the adapter 16 in a watertight manner.

  In order to advance and retract the bearing member 18 with respect to the adapter 16, as shown in FIGS. There are insertion screws 19 (only one is shown in FIG. 4) to be inserted into insertion screw insertion holes 18a provided at four overhang portions 18c on the outer periphery of the rear end side of the bearing member 18. Further, two nut members 20 and 21 are inserted through the insertion screw 19 with the overhanging portion 18c interposed therebetween. Bolt insertion holes 18b that are connected to the drilling machine main body A with fasteners such as bolts and nuts are provided at four locations on the inner peripheral side of the insertion screw insertion holes 18a of the bearing member 18. As the slide moves, the drilling machine main body A is slid to move the hole saw 13 and the center drill 22 of the drilling machine main body A forward and backward. Of the two nut members 20 and 21 inserted through the insertion screw 19, the nut member 20 located at the position facing the adapter 16 from the overhanging portion 18c functions as a lock nut.

  That is, after the lock nut 20 is moved in advance to the nut 16a side of the adapter, the nut member 21 is rotated in a tightening direction by a method such as using a tool, and the perforating machine main body A is slid in the feeding direction. The position is fixed by tightening the lock nut 20 at the reached position (FIG. 2), the handle 15 is rotated to feed out the hole saw 13 (FIG. 3), and then the electric motor is operated to pierce a predetermined portion of the existing pipe.

  When the drilling is completed and the drilling machine main body A is moved backward, the reverse operation is performed. That is, the handle 15 is reversely rotated to sufficiently retract the hole saw 13, and then the lock nut 20 is rotated in the opening direction, and the nut member 21 is reversely rotated to retract the drilling machine main body A. In this case, since the extension sleeve 17 is used only by reversing the handle 15 to reverse the hole saw 13, the center drill 22 and the tip of the hole saw 13 protrude and the valve body of the gate valve is closed. I can't. However, in this embodiment, since the drilling machine main body A can be further slid and moved backward, the tips of the center drill 22 and the hole saw 13 are moved backward to a position where the valve body of the gate valve can be reliably closed. Can be made.

  With such a configuration, the function equivalent to a large drilling machine with a long shaft can be exhibited without using a particularly large drilling machine, and the overall size of the drilling machine itself is the same as before, Nevertheless, since the feed amount of the drilling tool can be increased, drilling can be performed using a smaller drilling machine, and the excavation pit can be reduced by reducing the excavation pit in construction for connecting branch pipes.

  Furthermore, a centering fitting (corresponding to the centering means) 23 is fitted on the shaft 12, and the centering fitting 23 is fitted on the outer peripheral surface of the front end side of the bearing member 18. The inner surface can be inscribed. In addition, the centering fitting 23 incorporates a coil spring 24 as a biasing means from several places in the circumferential direction of the shaft 12, and constantly biases the adapter 16, the bearing member 18, and the shaft 12. It is automatically aligned. As a result, when the centering fitting 23 is attached to the gate valve device 2, the shaft 12 is centered in contact with the inner peripheral surface of the gate valve device 2, so that a predetermined portion of the existing pipe is reliably and stably provided. Can be perforated.

<Second Embodiment>
FIGS. 6 to 9 are works for drilling from right above to take out branches in the horizontal direction, and show a pipe drilling method for connecting branch pipes using the pipe punching machine according to the second embodiment.

  This pipe punching machine is mainly different from the above-described drilling machine of the first embodiment in that it does not have a bearing member, and therefore does not have a screw member, and has a configuration for drilling from the vertical direction. .

  FIG. 6 shows a split T-shaped branch case 1 having a split surface that can be water-tightly attached to the existing pipe K. The branch case 1 is attached to the existing pipe K, and the work partition valve 2 is connected to the branch case 1. And a state in which the branch pipe S is mounted, and the punching machine main body A is mounted on the upper portion of the working gate valve 2 via the adapter 26. In this case, the handle 2b of the gate valve 2 is turned in advance to pull the valve body 2a so that the hole saw 13 of the drilling machine can be fed out.

  The adapter 26 has an upper and lower two-stage cylindrical shape having a large diameter on the lower side and a small diameter on the upper side. The small diameter part is inscribed in a watertight manner on the outer peripheral surface of the extension sleeve 17 connected to the shaft of the drilling machine. A partition 27 is provided. A sealing material 27a is fitted into the inner peripheral surface of the intermediate partition 27 in two upper and lower stages, but the sealing material is not limited to this form.

  Next, as in the case of the first embodiment, the handle 15 on the rear end side of the drilling machine is rotated to feed out the hole saw 13 and the central drill 22, and as shown in FIG. Drill a predetermined portion of K.

  When the drilling is completed, the drive motor is stopped, the handle 15 is rotated in the reverse direction, and the hole saw 13 and the center drill 22 are moved backward. In that case, as shown in FIG. 8, a portion 28 of the existing pipe that has been cut off is supported by the shaft of the center drill 22 and pulled up.

  Thereafter, the fasteners such as bolts and nuts connecting the adapter 26 and the drilling machine main body A are released, and the drilling machine main body A is removed using a device such as a crane (not shown) as shown in FIG. While lifting, the valve body 2a of the gate valve is advanced and closed.

  In this case as well, using a conventional drilling machine used when drilling an existing pipe of a predetermined diameter, the function equivalent to a larger drilling machine with a long shaft is exhibited, and the entire drilling machine itself is Since the size is the same as before, and the feed amount of the drilling tool can still be increased, drilling can be performed using a smaller drilling machine, and weight can be reduced in constructions that connect branch pipes, etc. Even when a crane or the like is used, it is possible to achieve energy saving in the entire drilling method, such as the need to use a large crane with large energy consumption.

[Another embodiment]
(1) In the said embodiment, although the water pipe was mentioned as an example as an existing pipe, it is not limited to this from the first, but can apply to fluids, such as various liquids and gas.

Front partial sectional view for explaining a pipe drilling method for drilling by mounting a pipe drilling machine according to an embodiment of the present invention on a gate valve The figure explaining the same pipe drilling method as FIG. The figure explaining the same pipe drilling method as FIG. Exploded front sectional view of the main part of a pipe punching machine 4 is a right side view of the bearing member of FIG. Front principal part sectional drawing explaining the piping perforation construction method of another embodiment Front principal part sectional drawing explaining the piping perforation construction method of FIG. Front principal part sectional drawing explaining the piping perforation construction method of FIG. Front principal part sectional drawing explaining the piping perforation construction method of FIG. Front partial cross-sectional view explaining the conventional pipe drilling method Front partial cross-sectional view explaining the conventional pipe drilling method

Explanation of symbols

2 Gate valve device 12 Shaft 13 Drilling tool 14 Feeder 16 Adapter 17 Extension means 18 Bearing member 19 Screw member 20 Lock nut 21 Nut member 23 Centering means 24 Energizing means A Drilling machine main body K Existing pipe

Claims (4)

A pipe drilling machine having a drilling tool at the tip of the shaft, a drilling machine main body having a feed device for moving the shaft forward and backward, and a drive means for driving the drilling tool at the tip of the shaft, and capable of being attached to the gate valve device in a watertight manner In
The adapter is connectable to the gate valve device, has an adapter for supporting the perforator main body at a position to be separated from the gate valve device, and has extension means for connecting to the shaft and extending the shaft length,
The adapter is slidably and stopably connected between the drilling machine main body and the adapter, and supports the drilling machine main body so that the drilling machine main body is separated from the gate valve device. The bearing member is externally fitted to the extension means, and is fitted to the adapter in a watertight manner, and the bearing member is advanced and retracted, whereby the extension means with which the bearing member is externally fitted is provided. Can move forward and backward,
The centering means is fitted on the outer peripheral surface of the front end side of the bearing member, and can be inscribed in the inner peripheral surface of the adapter, and includes a biasing means, and the centering means is the adapter. The shaft is centered in contact with the inner peripheral surface of the gate valve device by sliding the bearing member in a direction toward the gate valve device. Pipe punching machine. The connection that allows the adapter and the bearing member to slide and stop is inserted into the screw member insertion holes provided in the vicinity of the outer peripheral portions of the adapter and the bearing member, and a plurality of nut members are connected to the screw member. The adapter and the bearing member are stopped by sliding the bearing member through the screw member and acting as a lock nut on one of the nut members that can be screwed onto the screw member. The pipe punching machine according to claim 1 to be made. A pipe drilling machine having a drilling tool at the tip of the shaft, a drilling machine main body having a feed device for moving the shaft forward and backward, and a driving means for driving the drilling tool at the tip of the shaft, and capable of being watertightly attached to the gate valve device In
It has an adapter that can be connected to the gate valve device and supports the drilling machine main body at a position to be separated from the gate valve device, and has an extension means that extends the shaft length by connecting to the shaft,
The pipe punching machine according to claim 1, wherein an intermediate partition that is inscribed in a watertight manner is disposed on an outer peripheral surface of the extension means connected to the shaft. A pipe drilling method in which a gate valve device is connected to an existing pipe, and the pipe drilling machine according to any one of claims 1 to 3 is connected to the gate valve device to drill a predetermined portion of the existing pipe.

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