JPH08141471A - Suction device for existing pipe lining method - Google Patents

Abstract

PURPOSE: To provide a suction and lining device capable of finely adjusting the sucking and lining speed at the process of sucking and lining resin by the sucking action of a suction pump. CONSTITUTION: The suction and pumping device is constituted of connecting the suction pump 16 for sucking and discharging the liquid injected into a feed pipe at a process of the preceding stage, a recovery tank 17 for recovering the sucked liquid, a pig stopping device 18 attached to a feed pipe opening part for recovering pigs used for a lining operation with a pipe line side in series. Besides, a suction power adjusting means 19 in a suction path so as to adjust a lining speed is interposed by a hose 20 between the recovery tank 17 and the pipe line side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended for repairing a supply pipe branched from a conduit, and a liquid resin of a necessary amount required for lining the inside of the supply pipe is used in the first step. The whole amount of the resin plug is transferred to the branch position on the conduit side by the liquid flow that is introduced into the pipe from the above-ground opening into the pipe and pressed from behind, and in the second step, inside the pipe by the suction pump connected to the above-mentioned ground opening. In the second step of the lining repairing method for the inner surface of the pipe, in which the resin flow is sucked and discharged and the suction force pulls back the resin plug to the end side of the supply pipe to apply the resin to the inner surface of the pipe to form a lining. The present invention relates to a suction device for sucking and discharging a liquid flow.

[0002]

2. Description of the Related Art As a lining construction method as described above, the present applicant has previously proposed a repairing construction method as described in JP-A-4-114773.

In this repair method, when a supply pipe branched from a conduit laid under a road toward a demand destination is targeted, a repair method by non-excavation is provided with a meter provided at the end side of the supply pipe. The liquid that is removed and used as the above-ground opening, and the amount of the liquid resin required for lining the inside of the supply pipe is introduced into the inside of the pipe in the form of a plug from the above-mentioned above-mentioned opening and is press-fitted into the rear pipe thereof. Flow the whole amount of the resin plug to the branch position on the conduit side, and in the second step, the liquid flow is sucked and discharged by the suction pump connected to the opening on the ground, and the suction force pulls the resin back to the end side of the supply pipe. Repair work is performed by applying resin to the inner surface of the pipe by the flow of the plug to form the required lining film.

[0004]

In carrying out this repairing method, in the second step, a liquid flow recovery tank is connected to the above-ground opening of the supply pipe via a hose and communicates with the upper space of the recovery tank. As described above, the suction pump is connected, and the suction action of the pump sucks out the liquid flow introduced into the pipe in the previous step and collects the liquid in the recovery tank. By suctioning and discharging the liquid stream,
The resin is applied to the inner surface of the pipe by the flow of the resin plug that is pulled back to the terminal side of the supply pipe to form the required lining film.

However, when lining is carried out by this method, since no means for adjusting the pump suction force, especially a fine adjustment means, is provided on the suction line system path, the lining speed in the pipe cannot be controlled in a predetermined manner, and it is desired. It is difficult to apply this lining film.

An object of the present invention is to provide a suction device capable of adjusting the suction lining speed, particularly finely adjusting it, with the object of solving the above-mentioned problems.

[0007]

In order to achieve the above object, the present invention is directed to repairing a supply pipe branched from a conduit, and a liquid resin in an amount necessary for lining the inside of the supply pipe. In the first step, the whole amount of the resin plug is transferred to the branch position on the conduit side by the liquid flow introduced into the tube from the ground opening at the end of the supply tube into the tube and press-fitted from the rear, and in the second step, The inner surface of the pipe that forms a lining by applying resin to the inner surface of the pipe by the flow of the resin plug that draws back the liquid flow in the pipe by a suction pump connected to the above-ground opening and is pulled back to the end side of the supply pipe by the suction force. In the second step, the above-mentioned opening of the supply pipe is connected to the above-mentioned lining repairing method so that the liquid flow recovery tank communicates with this via the connection hose and the inside space of the tank. A suction pump connected via a hose is provided, and a suction force adjusting means of a suction system passage is interposed between the recovery tank and the pipeline side so as to adjust the lining speed. To do.

According to the present invention, the suction force adjusting means is
Another feature is that the ball valve forms an orifice passage that connects the upstream side and the downstream side of the fluid passage in the closed state.

[0009]

According to the present invention configured as described above, at the time of the second step, the above-mentioned ground opening of the supply pipe is provided with a recovery tank for the liquid flow, which is communicated with the above through the connection hose, and the tank. A suction pump connected via a hose so as to communicate with the inside of the upper space is provided, and suction force adjusting means for the suction system passage is provided between the recovery tank and the pipeline side so as to adjust the lining speed. Because it intervenes,
Since the suction force adjusting means is a ball valve that forms an orifice passage with a variable diameter that allows the upstream side and the downstream side of the fluid passage to communicate with each other in the closed state, it is possible to adjust the lining speed in the pipe, and particularly finely adjust it. It is possible to form a predetermined lining film.

[0010]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows the first step (by the liquid flow,
(Injection and transfer of resin in a pipe). In the first step, the leveling pig 3 for lining construction is introduced into the supply pipe 7, and the resin injection device 11 is used to supply the liquid feed pump 10
The resin is injected into the pipe through the opening 14 on the ground by the liquid pressure obtained by the operation of. After that, the resin conveying pig 4, the liquid absorbing material 5, and the liquid blocking pig 6 are introduced into the pipe with the same liquid pressure using the pig cassette 8. Next, by continuously operating the liquid feed pump 10, the liquid B is sucked and pressurized from the liquid tank 9 and injected into the supply pipe 7 via the liquid flow control device 20, so that the resin plug A is removed. It is transferred to the branch position 2 on the side of the conduit 1. R in the figure is a hose for returning the excess liquid to the liquid tank so as to keep the pressure of the liquid being fed constant.

FIG. 2 shows a second step (suction lining) in which the suction device of the present invention is arranged. As shown in FIG. 2, the suction device of the present invention includes a suction pump 16 that suctions and discharges the liquid injected into the supply pipe from the pipe line in the previous step,
A recovery tank 17 for recovering the sucked and discharged liquid and a pig stop device 18 mounted on the supply pipe opening for recovering the pigs used for the lining construction are connected in series to the supply pipe side. In addition, the suction force adjusting means 19 of the suction system path is interposed between the recovery tank 17 and the pig stop device 18 by a hose 20 so as to adjust the lining speed. As shown in FIG. 3, the suction force adjusting means 19 has the form of a ball valve, and is attached on the recovery tank 17.

Further, in FIG. 3, the suction force adjusting means 19
Includes a valve body 24, a ball-shaped valve body 25 housed inside the valve body 24, and an operation handle 26 mounted on the valve body 24 so as to open and close the valve body 25. . Both sides of the suction force adjusting means 19 are respectively on the upstream side and the downstream side of the suction system passage, and are connected to the suction system passage by a hose 20.

Further, as shown in FIG. 4 (a), the valve body 25 of the suction force adjusting means 19 has a cylindrical central space portion 25a.
Thus, when the valve is opened, the state shown in FIG. 4A is established, and the upstream side and the downstream side of the valve are in complete communication.
Then, the valve body 25 is rotated 90 degrees in the vertical direction around the point O as the center of rotation using another operation handle (not shown), so that the valve body 25 is brought into the state shown in FIG. 4 (b). It will be closed. Further, since the pair of orifices 25b facing each other are formed in the spherical portions on both sides of the valve body 25, the upstream side and the downstream side of the valve are still in communication with each other to some extent by the pair of orifices 25b. Has become.

As described above, by rotating the operation handle 26 by 90 degrees in the horizontal direction, the opening / closing of the valve body 25 can be switched between the state shown in FIG. 3 and the state shown in FIG. 4 (b). In addition, by rotating another operation handle (not shown) by 90 degrees in the vertical direction, the valve body 25 is moved to the position shown in FIG.
The opening and closing can be switched between the state shown in FIG. 4A and the state shown in FIG. At this time,
As shown in (b), even when the suction force adjusting means 19 is in the closed state, the fluids on the upstream side and the downstream side of the valve are in communication with each other through the pair of orifices 25b, and the suction lining construction is performed. It is ready to continue.

In this way, in the second step, when the suction pump 16 is operated to suck and discharge the liquid injected into the construction pipe from the pipeline in the previous step, the suction force adjusting means 19
By opening and closing the valve body 25, two suction forces of different sizes are obtained and two kinds of fluid velocities are obtained, so that the lining velocity in the pipe can be controlled.

Further, as shown in FIG. 5, a large through hole 28 is formed in the valve body 25 in advance, and some orifice members 27 having different diameters are prepared to meet the demand for controlling the suction lining speed. Accordingly, by mounting orifice members having different diameters, the diameters of the pair of orifices 25b can be changed. Therefore, by finely adjusting the diameter of the orifice, the suction force of the suction system passage can be finely adjusted to finely adjust the suction lining speed, and the desired lining film can be applied to the inner surface of the tube.

[0017]

According to the present invention constructed as described above,
At the time of the second step, since the suction force adjusting means of the suction system passage is interposed between the recovery tank and the pipeline side so as to adjust the lining speed, the suction force adjusting means is closed. Since it is a ball valve that forms an orifice passage with a variable aperture that allows the upstream side and the downstream side of the fluid passage to communicate with each other in the above state, a predetermined lining film is formed by adjusting the lining speed in the pipe, particularly by fine adjustment. be able to. Further, since the suction lining speed can be adjusted, particularly finely adjusted, with only one operation with one valve, workability of the existing pipe lining repair work is improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first step (injection / transfer of resin in a pipe by a liquid flow).

FIG. 2 is an explanatory view showing a second step (suction lining using the suction device of the present invention).

3 is a sectional view of the suction force adjusting means shown in FIG.

FIG. 4 (a) is a sectional view showing one valve open state of the suction force adjusting means of FIG.

4 (b) is a sectional view showing a valve closed state of the suction force adjusting means of FIG.

FIG. 5 is a sectional view showing that the diameter of the orifice in the suction force adjusting means is variable.

[Explanation of symbols]

 16 Suction Pump 17 Recovery Tank 18 Pig Stopper 19 Suction Force Adjusting Means 24 Valve Body 25 Valve Body 25b Orifice 27 Orifice Member

Claims (3)

[Claims] 1. A supply pipe branched from a conduit is repaired, and a necessary amount of liquid resin required for lining the inside of the supply pipe is introduced into the pipe from a ground opening at the end of the supply pipe in the first step. The entire amount of the resin plug is transferred to the branch position on the conduit side by the liquid flow introduced in the form of a plug and press-fitted from the rear side, and in the second step, the liquid flow in the pipe is sucked and discharged by the suction pump connected to the above-ground opening. In the lining repairing method for the inner surface of the pipe, in which the resin is applied to the inner surface of the pipe to form a lining by the flow of the resin plug that is pulled back to the terminal side of the supply pipe by the suction force, the above-mentioned opening of the upper surface of the supply pipe during the second step. The part is provided with a recovery tank for the liquid flow, which is communicated with it via a connection hose, and a suction pump which is connected with the hose so as to communicate with the upper space of the tank. Above between the recovery tank and the tube roadside, the suction device of the existing pipe lining method of the suction force adjusting means of the suction pathway is interposed so as to adjust the lining speed, characterized by comprising. 2. The suction force adjusting means for the suction system passage is a ball valve that forms an orifice passage that connects the upstream side and the downstream side of the fluid passage when in a closed state. The existing pipe lining construction suction device. 3. The suction device for an existing pipe lining method according to claim 2, wherein the orifice passage is configured so that its diameter can be changed.