JP3276366B2 - Method of feeding objects in piping - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an object feeding method in a pipe for moving an object for lining or a wire through fluid pressure inside a main pipe and a branch pipe having one end connected thereto.

[0002]

[Prior art]

Conventionally, as shown in FIG. 4 (a), an object (4) is inserted from one end (1a) of the main pipe (1) and the one end (1a)
To the blower (9), the other end (1b) of the main pipe (1)
Was closed by the lid (5), and the object (4) was moved from the main pipe (1) to the branch pipe (2) only by pressurization by the blower (9).

[0003]

[Problems to be solved by the invention]

However, as shown in FIG. 4 (b), the object (4) goes too far inside the main pipe (1) with respect to the connection with the branch pipe (2), or as shown in FIG. 4 (c). And the main branch (1)
The object (4) is strongly pressed by the pressing force to the corner (10) at the connection part between the branch pipe (2) and the branch pipe (2), making it difficult or impossible to move the object from the main pipe (1) to the branch pipe (2). There was a risk of becoming. When an object is introduced from the branch pipe (2), the fourth
As shown in FIG. 4D, immediately after the object (4) enters the main branch (1), there is a possibility that the external force to the object (4) is balanced and the object (4) stops.

[0004] An object of the present invention is to make it possible to surely and smoothly realize object movement between the main branch pipe and the branch pipe, and to surely and smoothly realize object movement between the main branch pipe and the branch pipe.

[0005]

[Means for Solving the Problems]

According to a first aspect of the present invention, in order to move an object by fluid pressure from one end of the main pipe to the other end of a branch pipe having one end connected to the main pipe, the object is inserted from one end of the main pipe. One end of the branch pipe is connected to the discharge path connected to the discharge section of the pump, the other end of the main pipe is closed, and the other end of the branch pipe is connected to the suction path connected to the suction section of the pump. And pressurizing the rear of the object and depressurizing the front of the object, and moving the object near the connection with the branch pipe inside the main branch pipe by a pressure difference between the front and rear, at least the object is connected to the connection In the vicinity, the pressure in the branch pipe is reduced through the suction passage, the object is moved from the main branch pipe to the branch pipe by the suction force, and then the rear of the object is pressurized and the object is moved. Depressurize forward and move the object forward There the pressure difference to be moved to the other end inside of the branch pipe, its action is as follows.

[Operation] The movement of the object in the main pipe and the branch pipe is performed by pressing the rear side of the object and depressurizing the front side, and moving the object by the differential pressure before and after the object. The suction is guided from the rear side while being guided, and the inside of the main branch pipe and the branch pipe is smoothly and reliably moved by the front suction guiding action and the rear pressing action. When moving the object from the main pipe to the branch pipe, the other end of the branch pipe through the suction path connected to the pump in a state where the object is moved near the connection with the branch pipe inside the main pipe. Since the pressure is reduced from the side, the object is sucked and guided from the main branch pipe to the branch pipe side on the front side,
The conventional disadvantageous phenomena shown in FIGS. 4B and 4C can be reliably prevented, and the object can be smoothly moved from the main branch pipe to the branch pipe.

[Means for Solving the Problems] The second aspect of the present invention is characterized in that an object is fluid-pressured from the other end of the branch pipe having one end connected to the main pipe to the second end of the main pipe. To move, put the object from the other end of the branch pipe, and connect the discharge path connected to the pump discharge part to the end,
Closing a first end of the main branch and a second end of the main branch;
A suction passage connected to a suction portion of a pump is connected to an end, and a pressure is applied to the rear of the object and the pressure in front of the object is reduced. Near the connecting portion, or moved to the inside of the main pipe, at least in the state where the object is located near the connecting section, depressurize the second end side in the main pipe via the suction passage, The object is moved to the second end side of the main branch by a suction force. Thereafter, the rear of the object is pressurized and the front of the object is depressurized. The movement is to the second end, and the operation is as follows.

[Operation] The movement of the object in the branch pipe and the main branch pipe is performed by applying pressure to the rear side of the object and depressurizing the front side, and moving the object by the differential pressure before and after the object. While being guided by the suction, it is pressed from the rear side, and the inside of the branch pipe and the main branch pipe is smoothly and reliably moved by the front suction guiding action and the rear pressing action. When moving the object from the main pipe to the branch pipe, the second end side of the main pipe is located near the connection with the main pipe inside the branch pipe or with the object moved inside the main pipe. Since the pressure at the second end side is reduced by suction from the pipe, the object is sucked and guided from the branch pipe side to the second end side of the main pipe at the front side thereof, as shown in FIG. The conventional disadvantageous phenomenon shown can be reliably prevented, and the object can be smoothly moved to the second end of the main pipe.

As a result, the object for lining and passage can be surely moved smoothly between the main branch pipe and the branch pipe, and the more convenient pipe can be reliably moved smoothly across the main branch pipe and the branch pipe. Has established a method of feeding objects in the field.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 Next, a first embodiment will be described with reference to FIG. As shown in FIG. 1 (a), a branch pipe (2) obtained by cutting the main pipe (1) at two places and connecting one end to the main pipe (1).
Is cut at the other end. An appropriate amount of liquid lining material (3) is put in from one end of the main pipe (1), and a lining object (4) having an appropriate diameter corresponding to the inner diameter and the lining thickness of the main pipe (1) and the branch pipe (2). Into the main pipe (1), one end (1a) thereof is closed with a lid (5), and a discharge path (7) connected to a discharge section of a vacuum pump (6) is connected to the lid (5). I do. The other end (1b) of the main pipe (1) is closed with a lid (5), and the other end of the branch pipe (2) is closed with a lid (5), and a vacuum is applied to the lid (5). The suction passage (8) connected to the suction part of the pump (6) is connected.

As shown in FIG. 1 (b), the vacuum pump (6) is operated to pressurize the rear of the object (4) by one vacuum pump (6) and to pressurize the front of the object (4). The pressure is reduced, and the object (4) is moved to the vicinity of the connection with the branch pipe (2) in the main pipe (1) by the pressure difference between the front and rear, and the lining material (3) is washed away by the object (4) and the main pipe ( Apply to inner surface of 1). Then, as shown in FIG. 1 (c), the lining material (3) and the object (4) are sucked by the suction force from the other end of the branch pipe (2) through the suction passage (8). ) Is moved from the main branch pipe (1) to the branch pipe (2). Then, the object (4) is branched by the pressure difference between the front and the back (2).
And apply the lining material (3) to the inner surface of the branch pipe (2). Also remove the lid (5)
Excess lining material (3) and object (4) are collected from branch pipe (2).

Next, as shown in FIG. 1 (d), the lining material (3) and the object (4) are again inserted from one end (1a) of the main pipe (1), and the discharge path (7) is opened. One end (1a) of the branch pipe (1) is connected to the closed lid (5), and the other end of the branch pipe (2) is closed with the lid (5). The suction passage (8) is connected to the lid (5) whose end (1b) is closed. Thereafter, as shown in FIG. 1 (e), the vacuum pump (6) is operated to move the object (4) from one end (1a) of the main pipe (1) to the other end (1b). A lining material (3) is applied to the entire inner surface of the main pipe (1). Finally, the respective lids (5) are removed, and the surplus lining material (3) and the object (4) are recovered from the main pipe (1), and the main pipe (1) and the branch pipe (2) are restored and connected. I do.

Embodiment 2 Next, FIG. 2 shows a second embodiment. As shown in FIG. 2 (a), the lining material (3) and the object (4) are put into the other end of the branch pipe (2) having one end connected to the main pipe (1), and the other end is inserted. It is closed with a lid (5), and the discharge path (7) connected to the discharge part of the vacuum pump (6) is connected to the lid (5). The first end (1a) of the main pipe (1) is closed with a lid (5), and the second end of the main pipe (1) is closed.
The end (1b) is closed by the lid (5), and the suction passage (8) connected to the suction part of the vacuum pump (6) is connected to the lid (5).

As shown in FIG. 2 (b), the vacuum pump (6) is operated to move the object (4) from the branch pipe (2) to the main branch pipe (1) by a differential pressure across the object (4). And apply a lining material (3) to the inner surface of the branch pipe (2). Then, as shown in FIG. 2 (c), the lining material (3) is formed by the suction force from the second end (1b) side through the suction passage (8) due to the reduced pressure in the main branch pipe (1). ) And object (4)
Is moved to the second end (1b) side in the main pipe (1). Then, the object (4) is moved to the second end (1
b) and transfer the lining material (3) to the main pipe (1)
Apply to the inner surface of. The lid (5) is connected to the second end (1b).
Then, the surplus lining material (3) and the object (4) are collected from the main pipe (1).

Next, as shown in FIG. 2 (d), a lining material (3) and an object (4) are put into the first end (1a) of the main pipe (1), and the lid (5) is used. The lid (5) is connected to the discharge path (7), and the other end of the branch pipe (2) is closed with the lid (5) and the second end (1b) is closed. The suction path (8) is connected to the body (5). Then, as shown in FIG. 2 (e), the vacuum pump (6) is operated to move the object (4) from the first end (1a) to the second end (1b), and the main pipe ( A lining material (3) is applied to the entire inner surface of 1). Finally, the lids (5) are removed, the surplus lining material (3) and the object (4) are collected from the main pipe (1), and the main pipe (1) and the branch pipe (2) are restored and connected. .

Third Embodiment Next, a third embodiment will be described with reference to FIG. As shown in Fig. 3 (a), one end (1A) of the main pipe (1A)
Put the lining material (3) and the object (4) into a), close one end (1Aa) with the lid (5), and vacuum pump (6)
The discharge path (7) connected to the discharge section is connected. Main (1
The other end (1Aa) of A) and the other end of the branch pipe (1B) having one end connected to the main pipe (1A) are closed with a lid (5).
The other end of the branch pipe (2) having one end connected to B) is closed with a lid (5), and the lid (5) is connected to the suction section (8) of the vacuum pump (6). Connect. As shown in FIG. 3 (b), the vacuum pump (6) is operated to move the object (4) in the order of main pipe (1A) → branch pipe (1B) → branch pipe (2) by differential pressure between front and rear. Move the present invention (1
A), the lining material (3) is applied to the inner surfaces of the branch pipe (1B) and the branch pipe (2), the lid (5) is removed, and the excess lining material (3) and the object ( 4) is collected.

Next, as shown in FIG. 3 (c), the lining material (3) and the object (4) are put into the other end of the branch pipe (1B), and the other end of the lid (5) is closed. ) Is connected to the discharge path (7). One end (1Aa) of the main pipe (1A) and the other end of the branch pipe (2) are closed with a lid (5), and the other end (1Ab) of the main pipe (1A) is closed with a lid (5). Then, the suction passage (8) is connected to the lid (5). As shown in FIG. 3 (d), the object (4) is moved from the branch pipe (1B) to the other end (1Ab) of the main pipe (1A) by operating the vacuum pump (6) by the differential pressure between the front and rear. Then, apply the lining material (3) to the inner surfaces of the branch pipe (1B) and the main pipe (1A). Finally, the lids (5) are removed, and the surplus lining material (3) and the object (4) are collected from the main pipe (1A).
A), branch pipe (1B) and branch pipe (2) are restored and connected.

Another Embodiment Next, another embodiment will be described. The lining material (3) may be a room temperature curing type, a thermosetting type, or any other material. The object (4) may pass through a pipe for passing an in-pipe cleaning tool, an in-pipe inspection device, or the like into the pipe, and the shape of the object (4) may be a monosphere, a cannonball, or the like. And the material and structure of the object (4) can be appropriately selected. The type of fluid used to move the object (4) may be any gas or liquid. The order in which the object (4) is moved in the complicated piping can be appropriately selected according to the situation. For example, in the third embodiment, the object (4) may be sent in the order of the branch pipe (2) → the branch pipe (1B) → the one end (1Aa) or the other end (1Ab) of the main pipe (1A). .

Although a single pump (6) is advantageous in terms of workability and power saving, the discharge path (7) and the suction path (8) may be connected to separate pumps (6). Also, multiple pumps (6) may be used. The pressure reduction in the pipe by the pump (6) may be performed so as to determine the feed direction of the object (4) in a state where at least the object (4) is located near the connection between the main branch (1) and the branch pipe (2). At that time, the pressurization in the pipe may be weakened or stopped. Existing pipes for city gas, natural gas, water supply and the like are generally used, and buried pipes are particularly suitable, but any other pipes may be used.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a construction procedure according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a construction procedure according to a second embodiment of the present invention.

FIG. 3 is a conceptual diagram showing a construction procedure according to a third embodiment of the present invention.

FIG. 4 is an explanatory view of a conventional example.

[Description of Signs] 1... Main branch pipe 1a... One end or first end 1b... The other end or second end 3. …… inhalation path

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B05D 7/22 B05C 7/08

Claims (5)

(57) [Claims] An object feeding method in a pipe for moving an object (4) by fluid pressure inside a main pipe (1) and a branch pipe (2) connected to one end thereof, the method comprising: The object (4) is inserted from one end (1a) of 1), a discharge path (7) connected to a discharge part of a pump (6) is connected to the one end (1a), and the main pipe (1) is connected. ) Is closed and the branch pipe (2) is closed.
A suction path (8) connected to a suction part of a pump (6) is connected to the other end of the object (4), and a pressure is applied to the rear of the object (4) and depressurized in front of the object (4). Is moved inside the main branch pipe (1) to near the connection with the branch pipe (2) by the front and rear differential pressure, and at least the object (4) is positioned near the connection and the suction passage The pressure in the end side of the branch pipe (2) is reduced through (8), and the object (4) is moved from the main branch pipe (1) to the branch pipe (2) by the suction force. In a pipe that pressurizes the rear of the object (4) and depressurizes the front of the object (4), and moves the object (4) to the other end inside the branch pipe (2) by a differential pressure between the front and rear. Object feeding method. 2. A method of feeding an object (4) in a pipe for moving an object (4) by fluid pressure inside a main pipe (1) and a branch pipe (2) having one end connected to the main pipe (1). The object (4) is inserted from the other end of 2), a discharge path (7) connected to a discharge section of the pump (6) is connected to the other end, and a first end of the main pipe (1) is connected. A suction passage (8) connected to a suction portion of a pump (6) at a second end (1b) of the main pipe (1) by closing the portion (1a);
And pressurizing the rear of the object (4) and depressurizing the front of the object (4). The main pipe (1) is placed inside the branch pipe (2) by the pressure difference between the front and rear of the object (4). ) Near the connection,
Alternatively, the main pipe (1) is moved inside the main pipe (1), and at least the object (4) is located near the connection portion, and the second pipe in the main pipe (1) is passed through the suction passage (8). The pressure is reduced at the end (1b) side, and the object (4) is moved to the second end (1b) side of the main branch pipe (1) by the suction force. A method for feeding an object in a pipe, wherein the object (4) is depressurized in front of the object (4) and the object (4) is moved to the second end (1b) inside the main branch pipe (1) by a differential pressure between the front and rear. . 3. The method for feeding an object in a pipe according to claim 1, wherein a liquid lining material (3) is applied to the inner surfaces of the main pipe (1) and the branch pipe (2) by the object (4). . 4. A method for feeding an object in a pipe according to claim 1, wherein the object (4) passes through the main pipe (1) and the branch pipe (2). 5. The discharge path (7) and the suction path (8) are
5. The method for feeding an object in a pipe according to claim 1, wherein the object is connected to a discharge part and a suction part of a vacuum pump (6).