JPH08141472A - Suction device in existing pipe lining method - Google Patents

Abstract

PURPOSE: To provide a suction device capable of easily confirming whether or not plural pigs have been already recovered from the inside of a pipe at the process of sucking and lining resin by the action of a suction pump. CONSTITUTION: This suction device is constituted of connecting a suction pump 16 for sucking and discharging the liquid injected into a feed pipe at a process time 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 the pigs used for a lining operation with a feed pipe side via hoses 26, 28, and besides a passing pig detector for detecting the pig when the pig passed through, counting the number of pigs and issuing an alarm is interposed between the pig stopping device 18 and the feed pipe. The passing pig detector is constituted by connecting a detection part 30 to an alarm part 31 with a code 32.

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 in the first step, a necessary amount of liquid resin required for lining the inside of the supply pipe is supplied to the ground above the end of the supply pipe. The whole amount of the resin plug is transferred to the branch position on the conduit side by the liquid flow introduced into the pipe from the opening portion and press-fitted from the rear side, and in the second step, the suction pump connected to the above ground opening portion of the inside of the pipe In the second step of the lining repairing method for the inner surface of the pipe, in which the liquid 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 the.

[0002]

2. Description of the Related Art As a lining construction method as described above, the present applicant has proposed a repair construction method as described in Japanese Patent Application Laid-Open No. 4-1147773.

In this repair method, when a supply pipe branched toward a demand destination from a conduit laid under the road is targeted, a meter provided at the end side of the supply pipe is removed as a repair method by non-excavation. This is used as a ground opening, and in the first step, a liquid flow of a required amount of liquid resin required for lining the inside of the supply pipe is introduced into the pipe in the form of a plug and is press-fitted into the rear pipe through the ground opening. The whole amount of the resin plug is transferred to the branching position on the conduit side by the, 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 liquid plug back to the end side of the supply pipe. The resin is applied to the inner surface of the pipe by the flow of, and repair work is performed to form a required lining film.

[0004]

The suction device used in the above-mentioned conventional lining method has the following problems. That is, when performing the suction lining construction with the conventional suction device, it is not possible to easily confirm whether or not the plurality of pigs introduced into the pipe in the preceding step are collected, and particularly, the lining collected in the final stage. Since it is not possible to easily confirm the passage of the leveling pig for construction, it is not possible to minimize the amount of gas suction and discharge from the inside of the supply pipe. Therefore, due to excessive suction and discharge of gas, inconvenience is likely to occur on the lining application surface immediately after the formation of the inner wall of the conduit.

In view of the above-mentioned problems, the present invention makes it possible to easily confirm whether or not a plurality of pigs have been recovered from the inside of the pipe during the process of suction lining the resin by the suction action of the suction pump. It is intended to provide a suction device for a lining method.

[0006]

In order to achieve the above object, the present invention aims at repairing a supply pipe branched from a conduit, and provides a liquid resin in an amount necessary for lining the inside 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 that is introduced into the tube in the form of a plug from the above-ground opening at the end of the supply pipe, and is press-fitted from the rear of the tube. The liquid flow in the pipe is sucked and discharged by the suction pump connected to the opening, and the suction force pulls the resin plug back to the terminal side of the supply pipe to apply the resin to the pipe inner surface to form the lining. In the lining repair construction method, at the time of the second step, a pig stop device connected to the above ground opening of the supply pipe and a recovery tank for the liquid flow communicating with the pig stop device through a connection hose. And a suction pump connected via a hose so as to communicate with the upper space of the recovery tank, and the pig passes on the system of the suction line between the pig stopper and the pipeline side. Then detect it,
It is characterized by interposing a pig passage detector that counts and issues an alarm.

Further, according to the present invention, the pig passage detector is formed so as to cover the detection switch and the push button of the detection switch, and normally protrudes into the pipe and is pushed by the pig when passing the pig to the opposite direction. Another feature is that it includes an invertible rubber member having an actuating portion that retracts to and an alarm portion that issues an alarm.

[0008]

According to the present invention configured as described above, when a pig passes on the path of the suction line that connects the pig stop device and the supply pipe, the pig is detected and counted, and an alarm is issued to count the pig. Since the container is interposed, it is possible to easily confirm whether or not the multiple pigs that were introduced into the pipe in the previous process during the suction lining process were collected from the pipe, especially the lining that was collected in the final stage. By confirming the passage of the leveling pig for construction, the gas suction and discharge from the inside of the pipe can be minimized.

[0009]

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). As shown in FIG. 1, in the first step, as a means for injecting the liquid flow introduced from the above-ground opening of the supply pipe, a liquid tank 9, a liquid feed pump 10, and a liquid fed from the pump And a liquid flow control device 20 for controlling the flow, which are connected in series to the conduit side via hoses 12, 13 and 15. R in the figure is a hose for returning the excess liquid to the liquid tank so as to keep the liquid pressure during liquid feeding constant.

In the first step, the leveling pig 3 for lining construction is introduced into the supply pipe 7, and the resin injecting device 11 is used to open the resin to the ground with the liquid pressure obtained by the operation of the liquid feed pump 10. Inject into the tube from the portion 14. After that, the resin conveying pig 4 and the liquid absorbing material 5 with the same hydraulic pressure using the pig cassette 8
And the liquid blocking pig 6 is introduced into the pipe. 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 control device 20, so that the resin A is introduced into the conduit 1. Is transferred to branch position 2.

FIG. 2 shows a second arrangement of the suction device of the present invention.
The process (suction lining) is shown. As shown in FIG. 2, the suction device of the present invention is a suction pump 16 that sucks and discharges the liquid injected into the supply pipe during the previous step from the pipe line.
A recovery tank 17 for recovering the sucked liquid, and a pig stop device 18 attached to the supply pipe opening for recovering the pigs used for the lining construction via the hoses 26 and 28. Configured by connecting to the side,
A pig passage detector is provided between the pig stop device 18 and the supply pipe 7 to detect and count when a pig passes and to give an alarm. As shown in FIG. 2, the pig passage detector is configured by connecting a detection unit 30 and an alarm unit 31 with a cord 32.

FIG. 3 shows the details of the above-mentioned pig passage detector. As shown in FIG. 3, the detection unit 30 forming a part of the pig passage detector is attached to the wall portion of the tubular connecting portion 34 serving as the entrance of the pig stop device 18, and the pig passage detector is detected. An alarm unit 31 that constitutes another part of the above is attached to the side wall of the pig stop device 18.

The detection unit 30 also includes a detection switch 30a having a push button 30a 'and a rubber reversing rubber contact 30b formed so as to cover the push button 30a'.
It is configured with and. The inverted rubber contact 30b
Usually has an operating portion 30b 'that projects into the pipe and is pushed by the pig when the pig passes and retracts in the opposite direction.

As shown in FIG. 3, the detection switch 30a is mounted by screwing from the outside in the wall portion (opening formed in advance) of the tubular connecting portion 34 of the pig stop device 18. The inverted rubber contact 30b is fixed to the wall of the tubular connecting portion 34 so as to cover the push button 30a 'of the detection switch 30a and to face the inside of the tube.

In FIG. 4, the inverted rubber contact 3 is used.
0b is made of rubber, and its operating portion 30b 'is reversed to the opposite side by an external force, and when the external force disappears, it can return to its original state. As shown in FIG.
The pig 36 enters the tubular connecting portion 34 of the pig stop device immediately before being sucked from the conduit and collected by the pig stop device 18. At this time, since the pig 36 passes in front of the reverse rubber contact 30b, the operating portion 30 of the reverse rubber contact 30b is provided.
b ′ is hit by the pig 36 and pushed to the opposite side. As a result, the push button 30a 'of the detection switch 30a is pressed, and the buzzer of the alarm unit 31 sounds.

As described above, when a plurality of pigs successively pass in front of the above-mentioned inverted rubber contact 30b, the respective passages are detected and counted. When the passage of the last pig to be collected, the leveling pig 3 for lining construction is detected,
The operation of the suction pump 16 can be stopped immediately,
The suction and discharge of gas from the inside of the pipe can be minimized.

[0017]

According to the present invention, a pig passage detector for detecting and counting when a pig passes and for issuing an alarm is interposed on the system line of the suction line which connects the pig stop device and the supply pipe. Therefore, during the suction lining process, it is possible to easily confirm whether or not the multiple pigs that were introduced into the pipe in the previous process were collected from the pipe, especially for the lining construction that is collected in the final stage. Since it is possible to easily confirm the passage of the leveling pig, it is possible to minimize the suction and discharge of gas from the inside of the pipe. Therefore, it is possible to avoid the inconvenience that may occur on the coated surface of the pipe lining immediately after the formation due to excessive gas suction and discharge. Moreover, since the suction work of the suction pump can be finished in a timely manner, the efficiency of the lining construction 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 suction device of the present invention provided with a pig passage detector.

FIG. 3 is a cross-sectional view showing a detailed portion of a pig passage detector.

FIG. 4 is an explanatory diagram showing a state in which a pig passage detector detects a pig.

[Explanation of symbols]

 16 Suction Pump 17 Recovery Tank 18 Pig Stopper 30 Detection Section 30a Detection Switch 30a 'Push Button 30b Reverse Rubber Contact 30b' Operation Section 31 Alarm Section

Claims (2)

[Claims] 1. A repair target is a supply pipe branched from a conduit, and a necessary amount of liquid resin required for lining the inside of the supply pipe is plugged into the pipe from a ground opening at the end of the supply pipe in the first step. Is introduced and the liquid flow is pressed in from the rear to transfer the entire amount of the resin plug to the branch position on the conduit 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 end side of the supply pipe by the suction force, the above-mentioned opening of the supply pipe is performed during the second step. A pig stop device connected to the pig stop device, a liquid flow recovery tank that communicates with the pig stop device through a connection hose, and a hose that communicates with the upper space of the recovery tank. In addition to the suction pump connected via a pig passing detector on the system line of the suction line between the pig stop device and the pipe side, the pig passing detector that detects and counts when the pig passes and issues an alarm The suction device of the existing pipe lining method, which is characterized in that 2. The pig passage detector is formed so as to cover a detection switch and a push button of the detection switch,
2. A reversible rubber member having an actuating portion that normally projects into the pipe and is pushed by the pig to retract in the opposite direction when passing the pig, and an alarm portion for issuing an alarm. The suction device of the existing pipe lining method described.