JPH0415048B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method and apparatus for cutting an attached pipe end in a sewer pipe, such as cutting an attached pipe (branch pipe) end protruding into the main pipe. be.

<Prior Art> With the development of approximations and industrial television cameras, it has become possible to investigate small-diameter sewer pipes (pipes of 600φ or less that cannot be accessed by workers). In other words, TV cameras have been mounted on cars driving through sewer pipes, or on tractors pulled by wires placed at the front and rear ends, and surveys have been carried out while watching monitors installed on the ground (outside manholes). However, the problem here is that when a bogie runs along the full width of the pipe, if there is a protrusion in the pipe, it becomes an obstacle and prevents the cart from moving forward. Generally, as a general rule, there should be no protrusions of any kind inside the sewage pipe, but if the pipe is installed mid-way, the end of the pipe may become longer than necessary due to poor construction or subsequent ground movement. There are many things that stick out on the road.

<Problems to be Solved by the Invention> Conventionally, in order to remove the attached pipe end of this type of small diameter pipe line, a push rod was simply inserted from the manhole side, and the push rod moved to protrude into the main pipe. It was enough to destroy the end of the mounting tube. In this case, if the mounting pipe is made of ceramic pipe or the like, cracks are more likely to form than necessary, which may even lead to water leakage.

In view of the above-mentioned circumstances, an object of the present invention is to provide a method and device for automatically cutting the end of an attached pipe in a sewage pipeline using a special blade and cylinder corresponding to the diameter of the main pipe. That is.

<Means for Solving the Problems> One of the aspects of the present invention is to provide a curved blade corresponding to the arc of the diameter of the main pipe disposed on a predetermined truck part at the side of the end of the mounting pipe that can protrude into the main pipe. Another invention is a cutting method in which the blade body is sawed by moving back and forth with the stroke of the cylinder at the base end, and the cutting is performed by the rotation of the rod of the cylinder itself. This is an invention of an apparatus directly used for carrying out the invention of the method, in which an air cylinder facing in the direction of the pipe is installed on a predetermined truck, and a support arm attached to the rod end of the cylinder protrudes from which the diameter of the main pipe is fixed. A blade body having a curved shape corresponding to an arc of a circle and having a blade portion on at least one side is provided protruding in the direction of the pipe, and the rod of the cylinder is connected to a rotating means disposed at the rear end of the cylinder, so that the blade body can be moved back and forth. The structure allows for free movement and rotation in the lateral direction.

<Function> First, a television camera is introduced in advance from the opposite side of the attachment pipe end protruding into the main pipe, and a trolley-shaped cutting device is inserted from one side while watching the monitor on the ground connected to the television camera. , this blade part faces one side of the end of the mounting pipe that protrudes into the ceiling of the main pipe.
In this case, the truck itself is fixed by, for example, inflating the pack car attached to the truck to the fullest extent of its main pipe diameter, thereby making it substantially fixed. After this, the cylinder is driven by remote control, and the back and forth movement of the piston rod of the cylinder causes the blade disposed at the tip of the cylinder to carry out sawing operation, and at the same time, the rod itself is rotated by connecting it to the rear end. It rotates using shaft rotation means such as a rod or an angle motor to provide a cutting action and cut off the end of the attached tube.

<Example> Hereinafter, the present invention will be described in detail based on the device drawings of the example.

Reference numeral 1 denotes a bogie section which has running wheels 3 on all sides and is equipped with an air packer 2 consisting of a hard cylinder section 2a and an inflatable mantle section 2b on its outer periphery. A rod-type air cylinder 4 is provided, and a cylinder body 4a of the cylinder 4 is provided.
At the tip of the rod 5 protruding from one end, a blade body 7 with a curved cross section, which has straight blade portions 6 formed on both sides corresponding to the arc of the diameter of the main pipe A, is attached via a triangular support arm 8. A keyway 1 of a rotary piece body 11 having a rotary body connecting portion 10 at its end is attached to a sliding key portion 9 disposed at the end of the rod 5' protruding from the other end of the main body 4a.
2 are fitted together to form a slider type rotating part 13, and the whole becomes a traveling type cutting device 14 at the end of the attached tube.
In this case, the structure of the blade part 6 is a blade part with diamond abrasive grains for ceramic pipes and PVC pipes (see Fig. 5A), and a concave-convex blade part for humid pipes (see Fig. 5B). reference).

To explain the operation of this cutting device 14, first, a self-propelled television camera 15 for combined use is carried into the main pipe A through one manhole C using known means, and then transported to a separate working vehicle 16 placed on the ground. The television camera 15 is advanced to the vicinity of the mounting pipe B while watching the monitor 17.

Here, if the end Ba of this attachment pipe B protrudes beyond the wall surface of the main pipe A more than necessary and you want to cut the end Ba, use the other manhole C (opposite side).
Then, the cutting device 14 is carried into the main pipe A with the blade body 7 as the tip. The cutting device 14 can be transferred, for example, in semi-automatic operation by connecting a rotary push rod 18 having a predetermined length to the rotating body connecting portion 10 facing the rear end of the cutting device 14, and sequentially connecting the push rods 18. For example, the cutting device 14 moves the wheels 3 protruding back and forth, left and right with rolling movement, and positions the blade 7 at the lower side of the end Ba of the attachment tube B. Next, in this state, the hose 2 is connected to the compressor 19, which is separately arranged.
When air is supplied to the air packer 2 through the air packer 2, the rubber-like expansion mantle 2b expands and its outer periphery is brought into close contact with the inner surface Aa of the main pipe A, so that the cutting device 14 is substantially fixed. . In this case, the rod 5 of the cylinder 4 at the position where the pack car 2 is inflated is the main pipe A.
The blade body 7 is aligned with the center position of the blade and has a hooked protrusion on one end.
is set so that it is close to the inner surface Aa of main pipe A.
Moreover, at this time, the wheels 3 on all sides become floating.

After that, air is fed under pressure from a cutting hose 21 led from a compressor 19 placed on the ground, and air is sent alternately from boats 4b and 4b placed before and after the cylinder body 4a through a switching valve section 22, and the piston 23 is The rods 5 and 5' are moved back and forth by sliding back and forth. Therefore, the blade part 6 of the blade body 7 integrated with the tip of one of the rods 5 comes into contact with the outside Bb of the mounting pipe B,
By moving the blade 6 back and forth, the cutting is performed in a so-called saw-like manner. In this case, the contact rotation and cutting movement of the blade part 6 to the mounting pipe B can be achieved by slightly rotating the push rod 18 connected to the rotating body connection part 10 provided at the rear end of the cylinder 4. The rod 5' that engages with the keyway 12 of the rotating piece 11 of the rotating body connecting portion 10 is subjected to rotational movement in addition to the sliding movement accompanying the piston movement, and the piston 23 and rod 5 that are integral with the rod 5' are also rotated. Rotate as one. That is,
A blade body 7 with a curved cross section disposed at the end of the rod 5 rotates along an arc that becomes the inner surface Aa of the main pipe A, resulting in a cutting operation of this blade part 6.
Due to the combination of sawing and cutting movement, the end Ba of the attached pipe B is cut into a round shape, and the inner surface Aa of the main pipe A
The end Ba protrusion will be removed. Of course, the progress of cutting at this time is performed while checking the image from the television camera 15, which has been positioned in advance, on the monitor 17.

In addition, if the attachment tube B is made of ceramic tube, first the attachment tube B should cut the blade part 6 on the other side of the double-edged blade 7.
Make the cut line slightly in advance so that it faces the opposite side from the end Ba side, and if you make the cut from one side, it will not cause cracks when cutting it out.

FIGS. 10 and 11 are explanatory diagrams showing another embodiment, and this is a type in which the movement of the cutting device is automated by remote control.

That is, a remote-controlled self-propelled vehicle 25 is connected to the rear end of the traveling cutting device 14 carried into the main pipe A via a connecting rod 24.
are connected, and the cutting device 14 is sent to a desired position by pushing the self-propelled vehicle 25. The configuration of this self-propelled vehicle 25 is such that, for example, there are endless running belts 2 on both sides of the pedestal.
5a, and includes a drive motor 25b, a weight 25c, etc. on a pedestal. In addition, the cutting device 14 at this time has a cutting angle motor 2 at the rear end.
6 is used. The shaft 26a of the angle motor 26 for remote control is connected to the rotary body connection part 10 of the rotating part 13, and the rod 5,
5' is appropriately rotated to perform cutting motion.

At this time, the self-propelled vehicle cord 27 and the angle motor cord 28 are guided to the ground together with the air hoses 20 and 21 and connected to the working vehicle 16.

Further, in the work in this case, the television camera 15 is also used in conjunction with the above.
However, the connected cutting device 14 is moved by the pressure exerted by the self-propelled vehicle 25 during movement within the pipe, and the blade 17 is positioned at the end of the attachment pipe B. This sawing operation of the blade 7 is performed by the back and forth movement of the rods 5, 5' as the piston 23 of the cylinder 4 reciprocates, as described above. Further, the cutting operation in the arcuate direction is performed by rotating the rods 5 and 5', which are rotated integrally by the rotation of the angle motor 26.

<Effects of the Invention> As described above, the method and device for cutting the end of an attached pipe in a sewage pipe according to the present invention uses a blade body having an arc corresponding to the diameter of the main pipe, by using an appropriate means to cut the end of the attached pipe in a sewage pipe. By attaching it to the protruding rod of the cylinder and rotating the other end of the rod appropriately using a separate rotating means, the end of the mounting tube protruding into the main pipe can be moved by sawing and turning the blade. Can be automatically cut mechanically. Moreover, since the blade body is curved in an arc approximately equal to the diameter of the main pipe, the cut end is finished flush with the inner surface of the main pipe. Also, in this case,
If the truck part itself is fixed by using a packer attached to the outer periphery of the truck part, fixation to the tube wall and centering of the rod serving as the proximal end of the blade can be easily ensured. Simple fixing and centering can be achieved by providing a plurality of cylindrical overhanging arms disposed on the truck portion as the fixing means to the pipe wall. Furthermore, the movement of this blade is integrally attached to the rod end of the cylinder that faces the pipe line, and the reciprocating and rotational force is directly transmitted, allowing for strong sawing. It has the effect of being able to cut not only pipes but also Huyume pipes with reinforcing bars without difficulty.

[Brief explanation of drawings]

The drawings show the device used in the present invention; Fig. 1 is a side view, Fig. 2 is a perspective view with the packer section removed, and Fig. 3 is a side view.
Figures A and B are side views and front views of the same, Figure 4 is an explanatory view showing the inside of the cylinder, Figures 5A and B are plan views of the main parts of the blade, Figure 6 is a front view of the push rod, Figure 7 8 is an explanatory diagram of the state in use, FIG. 8 is a side view of the same packer part swollen, FIGS. 9A, B, and C are explanatory diagrams showing the attachment pipe cut state, and FIG. 10 is an explanatory diagram showing another embodiment. figure,
FIG. 11 is a side view showing the main parts. DESCRIPTION OF SYMBOLS 1... Truck part, 2... Air packer, 3... Running wheel, 4... Cylinder, 5, 5'... Rod, 6... Blade part, 7... Curved blade body, 13... Rotating part.

Claims (1)

[Claims] 1. A curved blade corresponding to the arc of the diameter of the main pipe disposed on a predetermined truck part is placed facing the side of the end of the attachment pipe that can protrude into the main pipe, and the blade is placed at the base end. In addition to sawing with a back-and-forth motion with a cylinder stroke of
A method for cutting an end of a fitting pipe in a sewer pipe, characterized in that cutting is performed by rotation of the rod of the cylinder. 2. An air cylinder facing the direction of the pipe is installed on a predetermined trolley, and a support arm attached to the protruding rod end of the cylinder is fitted with a blade having a blade on at least one side in a curved shape corresponding to the arc of the main pipe diameter. 1. A cutting device for an attached pipe end in a sewage pipe, characterized in that a body protrudes in the direction of the pipe, and a rod of the cylinder is connected to a rotating means disposed at the rear end of the cylinder. 3. The device for cutting an attached pipe end in a sewage pipe as claimed in claim 2, wherein the cart is a patrol car mounted type cart.