JPH0434953Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is used to remove rust, tar, sand, etc. that remain in the pipes, such as cuttings when drilling holes in the gas pipes during city gas pipe construction. This invention relates to a device that removes foreign matter using a no-blow method.

[Prior art and its problems] When a gas pipe is drilled, chips from the drilling fall into the gas pipe, so conventionally a rod with a permanent magnet was inserted into the pipe through the hole to remove the chips. Either by attaching it to the tip of this rod and removing it, or by inserting a pipe 02 from hole 01 as shown in Fig. 3 and using gas pressure to flow the chips out of the pipe through this pipe 02 and removing them. Or, as shown in Fig. 4, using the mounting base 03 of the no-blow type hole drilling machine, insert the collection tool 04 with a permanent magnet into the pipe, and move the collection tool 04 freely to make the chips adhere. There is a known method of removing it. However, even when using the stand of this no-blow type drilling machine, chips adhering to the permanent magnet can be removed, but tar, sand, mud, etc. that do not adhere to the permanent magnet remain as they are.

[Purpose of the present invention] The present invention provides a device that can remove foreign substances such as chips, sand, mud, and rust in a gas pipe without blowing when they become an obstacle to gas shutoff. The purpose is to make suggestions.

[Structure and operation of the present invention] The present invention proposes the following device as a device for achieving the above object.

A bifurcated suction pipe and a discharge pipe are protruded from the main body, which has a pressure contact surface for the gas conduit at the lower end and a cavity that penetrates the pressure contact surface inside, and a hole bored in the gas conduit in the suction pipe. The tip can be inserted into the gas conduit through the suction tube, and the other end comes out of the suction tube and is connected to the negative pressure side of the explosion-proof suction machine. A device that removes foreign substances such as chips using a method.

In the above device, when a hole is made in the gas pipe, the main body is fixed by applying the pressure contact surface to the part of the drilled hole, and the main body is inserted into the gas pipe through the nozzle hole, and the rear end of the nozzle is sucked. The suction machine is operated by communicating with the negative pressure side of the machine and communicating the discharge side of the suction machine with, for example, a discharge pipe.

When the suction machine is operated, chips, sand, etc. inside the pipe are sucked together with gas from the nozzle, and the gas, chips, sand, etc. are separated in the suction machine. Separated chips, sand, etc. are removed from the suction machine, and the gas is returned to the gas conduit through the return pipe, the discharge pipe, and the main body.

Note that a separator for gas and chips, etc. may be built into the suction machine, or may be separately installed between the suction machine and the nozzle.

[Embodiment and its operation] Figures 1 and 2 show an embodiment of the present invention, and Figure 1A
1 is a gas conduit, 2 is a hole, and 3 is a device body fixed to the hole 2 by a fixture,
As shown in FIG. 2, this main body 3 has a pressure contact surface 4 that contacts the hole 2 of the gas conduit 1 on its lower surface, and a cavity 5 that penetrates the pressure contact surface 4 inside.
It has a structure in which a suction pipe 6 and a discharge pipe 7 protrude from the upper part in a bifurcated manner, and a nozzle 8 is incorporated into the suction pipe 6 so as to be freely inserted and taken out.

9 is an explosion-proof suction device whose negative pressure side is connected to the nozzle 8 and whose discharge side is connected to the discharge pipe 7. Inside this suction device 9 is a filter (separator) for separating gas from chips, etc. ) is included.

A return pipe 10 communicates the discharge side of the suction device 9 with the discharge pipe 7 of the main body 3.

If a bypass pipe 11 for bypassing the construction section is installed as shown in FIG. 1, the return pipe 10 may communicate with the bypass pipe 11 as shown in FIG. 1B.

The embodiment has the configuration as described above, and its operation will be explained next. First, the nozzle 8 is inserted into the pipe through the hole 2 of the gas conduit 1, its tip 8' reaches a position where chips or sand are present, and the operation of the suction machine 9 is started. When suction starts, the tip 8' of the nozzle 8
Gas is also sucked in along with chips, etc.
It enters the suction machine 9 through the nozzle 8, and solids such as chips are removed by a filter therein. The gas enters the discharge pipe 7 from the discharge side of the suction device 9 via the return pipe 10 and is returned from the cavity 5 of the body 3 via the hole 2 into the gas conduit 1 . When the return pipe 10 is connected to the bypass pipe 11, the gas is returned into the gas conduit 1 via the bypass pipe 11.

[Effects of the present invention] As described above, the present invention fixes the main body of the device having the bifurcated suction pipe and discharge pipe to the hole in the gas pipe, and inserts the nozzle into the gas pipe from the suction pipe. Since chips and the like are forcibly sucked in by a suction machine, and after separating the solids such as chips, the sucked gas is returned to the gas pipe, so the following effects can be expected.

a) Because of the forced suction from the nozzle, all foreign substances such as sand, mud, and tar can be completely removed in addition to chips. Therefore, troubles caused when gas is shut off are eliminated.

b Since the nozzle can be moved in and out at will to perform suction, it is possible to remove foreign substances from a wide range of areas within the tube.

c. Gas sucked together with foreign matter is returned to the gas pipe, making it safe.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the state in which the device according to the present invention is installed and foreign matter is removed from the inside of the gas pipe;
The figure is an explanatory diagram of the main body of the apparatus and its attached state, and FIGS. 3 and 4 are explanatory diagrams of a conventional example. 1... Gas conduit, 2... Hole, 3... Device main body,
4... Pressure contact surface, 5... Cavity, 6... Suction pipe, 7...
...Discharge pipe, 8... Nozzle, 9... Suction machine, 10...
...Return pipe, 11...Bypass pipe.

Claims (1)

[Claims for Utility Model Registration] (1) A bifurcated suction pipe and a discharge pipe are protruded from a main body which has a pressure contact surface against a gas pipe at its lower end and a cavity that penetrates the pressure contact surface inside. At the same time, the tip of the suction tube can be inserted into the gas conduit through a hole bored in the gas conduit,
A device that removes foreign substances such as chips using a no-blow method from inside a gas conduit, which has a suction nozzle that comes out from the suction pipe and is connected to the negative pressure side of an explosion-proof suction machine at the other end. (2) A device for removing foreign matter such as chips from the inside of a gas pipe in a no-blow method as set forth in claim 1 of the utility model registration, which is formed by communicating the discharge side of an explosion-proof suction device with a discharge pipe. (3) The discharge side of the explosion-proof suction device is connected to a bypass pipe installed in the construction section of the gas pipe, and chips, etc. are removed from the gas pipe in a no-blow method as set forth in claim 1 of the utility model registration claim. A device that removes foreign objects.