JPS6339321A - Device for discharging pressurized fluid in inner lining work for pipe - Google Patents

Abstract

PURPOSE:To so constitute the title method that a flow of a pressurized fluid in a circumferential direction of a pipe is given to that in a longitudinal direction of the pipe, a temperature distribution within the pipe is made uniform, operation time is shortened and unevenness of a hose is eliminated, by a method wherein a plurality of discharge holes are provided on the circumference of terminal metal fittings, valve is provided respectively on the discharge holes and opening and closing of the valve is performed. CONSTITUTION:A communicating member 19 is kept stored by moving the same backward within a cylindrical part 17. Then a hose 6 is inserted into a pipe 1 by inverting the hose 6 and the hose 6 is stuck to an inner wall surface of the pipe 1 with an adhesive agent 7. Then the communicating member 19 is screwed into the pipe 1, an adhesive agent layer and the hose 6 are broken through by the conical tip 24 of the communicating member 19, the inside of the hose 6 and discharge holes 11-16 are communicated with one another and control equipment is driven. With this construction, valves V1-V6 are opened or closed time-limitwise. Consequently, as discharge directions of a pressurized fluid changes over in order in the clockwise direction, a flow of the pressurized fluid in a circumferential direction of the pipe 1 is given to that in a longitudinal direction of the pipe 1.

Description

[Detailed description of the invention]

[Field of Industrial Application] The present invention relates to a device for discharging air and steam in a rehabilitation hose to the outside from a terminal fitting in a pipe lining method for rehabilitating the inner wall surface of an existing pipe such as a gas pipe or water pipe. It is related to. [Prior art] The pipe lining construction method is shown in Figures 10 and 11' below.
This will be explained with reference to the figures. This pipe lining method, as typified by the method described in Japanese Patent Publication No. 5FL-37213, consists of the following steps. (1) First, the inner wall surface of the pipe 1 to be lined in the previous step is cleaned. (2) Next, between the ends of pipe 1 mentioned above.

[Attach the terminal fitting 2 to the -1 section to close the terminal opening. (3) Subsequently, a reversing machine 3 is connected to a section 1-1 between the starting ends of the two series of pipes 1, and an air compressor 4 and a boiler 5 are connected to the reversing machine:3. (4) Then, the air compressor 1 connector 4 is driven to supply compressed air into the reversing machine 3, and the hose 6, which has been wound in advance inside the reversing machine 3, is connected from the start □ end opening of the pipe 1 with the above-mentioned compressed air. Invert and insert into tube 1 using the (5) The above-mentioned reversely inserted hose 6 is adhered to the inner circumferential surface of the tube 1 using the adhesive 7 applied in advance to the inner surface of the hose 6 or the inner wall surface of the tube 1 before being reversed. (6) Next, while maintaining the air pressure in the pipe 1 at a predetermined pressure, the boiler 5 is driven to transfer the steam to the inverter 3.
Press fit into the hose 6 through. (7) At the same time as the above-mentioned steam is press-fitted, air is first discharged from the discharge hole 8 and valve 9 provided in the terminal fitting 2, and then steam and pressurized fluid such as air are appropriately discharged, so that the pressure in the hose 6 is The adhesive 7 is solidified and the hose 6 is stretched on the inner wall surface of the pipe 1 while adjusting the temperature and temperature. In this pipe lining construction method, the pressure in the hose 6 is such that the hose 6 hangs and unevenness is created on the inner wall of the pipe 1 until the adhesive 7 completely solidifies and the hose 6 and the pipe 1 are integrated. It is necessary to keep it at a level that does not occur. For this purpose, 0.8 kg
/d of steam and 0.8 to 1 kg/cd of air are supplied into the hose 6 from the starting end opening of the pipe 1, while the steam and pressurized fluid such as air are passed from the hose 6 to the discharge hole 8 of the terminal fitting 2. Discharge from valve 9 appropriately. Furthermore, if the temperature in the double hose 6 is too low, it will take a long time for the adhesive 7 to assimilate, resulting in poor work efficiency. vice versa,
If the temperature is too high, a compound of carbide and oxygen will form in the oxidized part of the corroded inner wall of the pipe, which will lead to the formation of a gaseous body (C
O, is generated. ), the gas expands as the temperature rises and acts as a force that presses the hose 6 in from the outer wall, and as a result, the hose 6 swells in places and becomes uneven. For this,
The temperature inside the hose 6 is maintained at 60 to 80° C. by adjusting the steam loss and the amount of air. [Problems to be Solved by the Invention] However, the pressurized fluid discharge device in the above-mentioned pipe lining method is simply provided with a discharge hole 8 in the terminal fitting 2 and a valve 9 in the middle of the discharge hole 8. Therefore, the steam and air supplied from the starting end opening of the pipe 1 pass through the long pipe 1 and are discharged from the discharge hole 8 and valve 9 to 11I.
During evacuation, the temperature distribution in the tube is separated into an upper hot layer and a lower cold layer. This results in a large difference between the adhesive setting time of the second part of tube 1 and the adhesive setting time of the lower part, which, when matched with the adhesive assimilation time of the upper hot layer,
Adhesion between the lower part of the tube 1 and the hose 6 is not sufficient. On the other hand, if the adhesive solidification time of the lower low-temperature layer is used, it will take a long time and workability will be poor. Also, if the temperature in tube 1 is increased,
There are problems such as gas being generated in the corroded portions of the tube 1 and causing unevenness. Therefore, if we use a method that hardens at room temperature instead of an adhesive method that hardens by applying heat, the variation in temperature distribution in the pipe 1 can be eliminated, but it takes approximately Because it requires 3 days, the room temperature curing method is not used from the viewpoint of workability, and the current situation is that the thermosetting method is exclusively used. An object of the present invention is to provide a pressurized fluid discharge device for use in pipe lining construction methods, which uniformizes the temperature distribution in the pipe, provides sufficient adhesion, has good work efficiency, and does not cause irregularities on the hose. . [Means for solving the problem] The present invention provides a plurality of discharge holes on the circumference of the terminal fitting,
A valve is provided in each of the plurality of discharge holes, and a control device for controlling opening and closing of the valve is linked to the plurality of valves. [Operation] The present invention switches the discharge direction of the pressurized fluid by controlling the opening and closing of a plurality of valves, so that the pressurized fluid flows in the circumferential direction of the pipe (recirculation) with respect to the flow in the longitudinal direction of the pipe. Attached Jj
can do. [Example 2] Hereinafter, two examples of the pressurized fluid discharge device in the pipe lining method of the present invention will be described with reference to FIGS. 1 to 9. 1 to 7 show a first embodiment of the pressurized fluid discharge device in the pipe lining method of the present invention. The figure is a cross-sectional view taken along the line TI-II in Figure 1, and Figure 3 is a cross-sectional view taken along the line I in Figure 1.
II enlarged view, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3 with the conductive member inserted, FIG. 5 is an explanatory diagram of the control device and the valve, and FIGS. 6(a) to (f) are FIG. 7 is an explanatory diagram showing the opening/closing control of six valves. FIG. 7 is an explanatory diagram showing the output of open signals and close signals to the six valves. In the figure, the same reference numerals as in FIGS. 10 and 11 indicate the same numbers. In the figure, 11, 12, 13, 14, 1, 5, 16 are a plurality of discharge holes provided at equal angular (60°) intervals in the circumferential direction of the terminal fitting 2, and in this example, six discharge holes. The discharge holes II, 12, 13, 14, 15, and 16 are screwed into a hollow cylindrical portion 17 integrally protruding from the terminal fitting 2, and a screw hole 18 provided in the top plate of the cylindrical portion 17. It consists of a conductive member 19. The two conductive members 19 include an outer cylindrical portion 21 in which a communication passage 20 is provided in the axial direction, and a spiral passage 22 provided on the outer circumferential surface of the outer cylindrical portion 21. It consists of a shaft portion 23. The tip 24 of the outer cylindrical portion 21 of the conductive member 19 is formed into a conical shape, and a small through hole 25 is provided in the conical tip 24 so as to communicate with the communication path 20. An O-ring 26 is fitted to the outer circumferential surface of the intermediate portion of the outer cylinder portion 21. A threaded portion 27 is provided on the outer circumferential surface of the proximal end of the outer cylinder portion 21, and a connection 1] 28 is provided at the proximal end to communicate with the communication path 20. The threaded portion 27 of the conductive member 19 thus formed is screwed into the threaded hole 18 of the cylindrical portion 17 from the inside. Vl, V2. V3. V4. V5. V6 has the six discharge holes I+, +2.13. l/l, 15.16
These valves Vi, V
2°V3. V4. V5. V6 is a 2-point, 2-position switching valve, and is connected to the spring offset valve 1 using an electromagnetic method. In addition, the fifth
In the figure, only the first valve (1) is shown using hydraulic symbols. 29 are the six valves Vl, V2. V3. V4°V5. This control device Ft29 is a control device linked to each valve V6, and this control device Ft29 has six valves V:1. ．． V2. v3゜V4. V5. It consists of a timer device that sequentially opens and closes V6 in a timed manner, and six valves Vl, V2 . V3°V4. , V5
．． The solenoid 1 of V6 is connected to each other, and the open signal (signal to energize the solenoid) and the close signal (signal to demagnetize the solenoid) are sent to the alternating current 77 at regular intervals, and the fixed time is 3 etc./l). The six valves Vl, V2. V3.
V4. VFi, Vf''; In other words, as shown in Figure 7, the signal is sent to the first valve Vl.
and a closing signal to the fourth valve V4, respectively, and after a predetermined time 1 has elapsed, an open signal is output to the second valve V2, and a closing signal is output to the fifth valve V5. Further, after the predetermined time T has elapsed, an open signal is output to the third valve 3, and a close signal is output to the sixth valve V6. Further, after a predetermined time T has elapsed, an open signal is output to the fourth valve 4, and a close signal is output to the first valve v1. Furthermore, after the predetermined time T has elapsed, the fifth
An open signal is output to the valve V5, and a close signal is output to the second valve v2. Then, after a predetermined time T has elapsed, an open signal is output to the sixth valve (6) and a close signal is output to the third valve V3. Thereafter, in the same way, the open signal and the close signal are alternately sent to the valves VL, V2 . V3°V4.
V5. Output to V6. The pressurized fluid discharge device of the present invention in this embodiment is as follows.
It consists of the following configuration, and its operation will be explained below. First, as shown in FIG.
7 and store it. Next, as explained in the process of the pipe lining method described above, the hose 6 is inverted and inserted into the pipe 1, and the hose 6 is bonded to the inner wall surface of the pipe with the adhesive 7. Then, the communicating member 19 is screwed into the tube 1 and the conical tip 24 of the communicating member 19 is connected to the adhesive 7.
The layer and the hose 6 are pierced, and the inside of the hose 6 is communicated with the six discharge holes II, +2.11.14°15, 16, and the control unit W21) is driven. Then, as shown in FIG. 6, for example, the first valve Vl and the second valve V2
．． The third valve v3 opens, and the fourth valve V4. Fifth valve V5. The sixth valve 6 is closed, and the pressurized fluid in the hose 6 is discharged from the first discharge hole 11. Second discharge hole 12. It is discharged to the outside from the third plowing hole 13 (see (a)). Next, when a predetermined period of time 1'' has elapsed, the first valve v1 closes and at the same time the fourth valve v4 opens, and the pressurized fluid flows through the second discharge hole 12. Third discharge hole 13. It is discharged to the outside from the fourth discharge hole 14 (see (b)). Subsequently, when the predetermined time T has elapsed, the second valve v2 closes and at the same time the fifth valve v5 opens, and the pressurized fluid flows through the 3111i outlet hole 13. It is discharged to the outside from the fourth discharge hole 14° and the fifth discharge hole 15 (see (C)). Thereafter, repeat the same process sequentially to adjust the valves Vl, V2°V3
, V4-, V5, VC; open and close in a timed manner. As a result, as shown in FIGS. 6(,) to (f), the discharge direction of the pressurized fluid is sequentially switched clockwise. Circumferential flow (recirculation) is provided. Therefore, hose 6
A swirling flow is created in the tube 1, which agitates the pressurized fluid in the hose 6 and homogenizes the temperature distribution in the tube 1. In addition, in this embodiment, since the spiral passage 22 is provided in the communication member 19, the pressurized fluid can flow through the discharge holes 11, 12,
13, 14, 15, 16, a spiral flow is applied and it is possible to further agitate the pressurized fluid in the tube 1 to homogenize the temperature distribution in the tube 1. 8 and 9 show a second embodiment of the pressurized fluid device in the pipe lining method of the present invention, FIG. 8 is a longitudinal sectional view of the terminal opening of the pipe and the terminal fitting, and FIG. is an explanatory diagram of a control device, a temperature sensor, and a valve. In the drawings, the same reference numerals as in FIGS. 1 to 7, 10, and 11 indicate the same parts. In the figure, SL, 82. S3. S4, 85°S6 is 6
A temperature sensor provided in each of the discharge holes 11, 12, 13, 14, 15, 16,
82. S3,84. S5. S6 outputs a detection signal when the temperature falls below a predetermined lower limit temperature and when the temperature reaches a predetermined upper limit temperature. 30 is a control device, and this control device 30 includes the six temperature sensors S1. , S2. S3. S4. ．． 85
°S6 and 6 valves vl, 'v2. V3. V4.
. V5. Control unit C linked to the V6 solenoid
1, C2, C3, C4', C5', and C6, and the temperature sensor 81. S2', S3. S'4. The lower limit temperature detection signal from S5゜S6 is sent to the control units C'l, C'2゜C3, C4.
, C5, C6, the opening signal is input to valves Vl, V
2. ■3. V4. V5. V6, and temperature sensors Sl, S2 . The upper limit temperature detection signal from S3, 84°S5, 36 is sent to the control unit C1°C'2. C3, C4, C5, C
B, the closing signal is sent to valves Vl, V2 . V3.
V4. It is output to V5°■6. Since the pressurized fluid discharge device of the present invention in this embodiment has the above-described configuration, six discharge holes 11, 12.
3.14.15.16 The temperature of the pressurized fluid in 6 temperature sensors 81. S2. S3. S4, 85°S6 respectively detect, and when the detected temperature is below the lower limit temperature, the detection signal is sent to the six control units C1, C2, C3 of the control device 30.
, C4, C5, and C6, respectively, and the control unit C1
, C2, C3, C4 ° C5, C6 to 6 valves Vl
, V2. V3°V4. V5. An open signal is output to the solenoid of V6, and the valve V1. ．． V2', V3. V4. V5.
V6 opens. In addition, when the above-mentioned detected temperature is higher than the upper limit temperature, the detected temperature is controlled by the control unit C1, C2, C3, C4°C.
5, C6, and its control unit C1, C2, C3゜C4
, , C5, C67 R1, valve Vl, V2. V3゜V4
-, V5. An open signal is output to the solenoid of V6, and valves Vl, V2. V3. V4. V5. V6 closes. In this way, six discharge holes 11.1.2.13.14.
Depending on the temperature situation of the pressurized fluid in 15°16, six valves Vl, V2□, V3. V4. ．． V5. Since V6 is opened and closed, the discharge direction of the pressurized fluid is switched depending on the temperature of the pressurized fluid to be discharged. Therefore, a flow in the circumferential direction of the tube is imparted to the flow of the pressurized fluid in the longitudinal direction of the tube 1.
It is possible to make the humidity distribution inside uniform. As is clear from ``Effects of the Invention'', the pressurized fluid discharge device in the pipe lining method of the present invention has a plurality of discharge holes provided on the circumference of the terminal fitting, and the plurality of discharge holes are provided on the circumference of the terminal fitting. A plurality of valves are provided in each hole, and the plurality of valves are opened and closed as appropriate by a control device, so that the flow of pressurized fluid in the longitudinal direction of the pipe is caused to flow in the circumferential direction of the pipe! j, can. Therefore, it is possible to make the humidity distribution in the pipe uniform, and the hose can be bonded to the pipe within 1 minute, and the work time can be shortened to improve the work efficiency. Unevenness can be eliminated. Figures 1 to 7 show a first embodiment of the pressurized fluid discharge device ft in the pipe lining machine V of the present invention. Figure 1 shows the terminal end 11 of the pipe. Longitudinal cross-sectional view of the “old” part and the terminal fitting,
Figure 2 is a sectional view taken along line nn in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
4 is a sectional view taken along line IV--2 in FIG. 3 with the conductive member inserted, FIG. 5 is an explanatory diagram of the control device and valve, and FIGS. 6(a) to (f) ) is an explanatory diagram showing the opening/closing control of six valves, and FIG. 7 is an explanatory diagram showing the output of open signals and close signals to the six valves. 8 and 9 show a second embodiment of the pressurized fluid device in the pipe lining method of the present invention, FIG. 8 is a longitudinal sectional view of the terminal opening of the pipe and the terminal fitting, and FIG. is an explanatory diagram of a control device, a temperature sensor, and a valve. FIGS. 10 and 11 are explanatory diagrams showing a pipe lining method using a conventional pressurized fluid discharge device. 1. Pipe, 2.. One end fitting, 6.. Hose, 7.. Adhesive, 11.12. i, 3.1.4. ]5.16...
Discharge hole, 29.30...control device, Vl,, V2. V3
．． V4. V5. V6 valve, Sl, S2. S3. S4.
S5. S6...4, 11 degree sensor, C1, C2, C3
, C4, C5°C6...control unit. Fig. z Fig. 2 Fig. 3 Fig. 4 Bu 9 1 Bubu (Bu 2. Bu 3. f4. Bu 5
．． Prono 23 \, ” ,, 20. Knob 8 Bu 7 ' 272 Bu 2, .226 '\X7 Fig. 5 Fig. 6 (a) (b)
(.) (d)
/eノ (f) Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. Attach a terminal fitting to the end opening of the pipe to close the end opening, insert the hose inverted from the starting end opening of the pipe using air pressure, and attach the hose to the inner wall surface of the pipe with adhesive. Glue to
In a pipe lining method in which steam is pressurized into the hose, pressurized fluid such as air or steam is discharged from the terminal fitting, the adhesive is solidified, and the hose is stretched on the inner wall surface of the pipe. A pipe lining characterized in that a plurality of discharge holes are provided on the circumference of the pipe, a valve is provided in each of the plurality of discharge holes, and a control device for controlling opening and closing of the valves is linked to the plurality of valves. Pressurized fluid discharge device in construction method. 2. The pressurized fluid discharge device for the pipe lining method according to claim 1, wherein the control device comprises a timer device that sequentially opens and closes a plurality of valves in a timed manner. 3. The control device connects the temperature sensors provided in each of the plurality of discharge holes, the temperature sensor, and the valve, and outputs an open signal to the valve when the temperature falls below a predetermined lower limit, and when the temperature exceeds the predetermined upper limit. 2. The pressurized fluid discharge device for a pipe lining method according to claim 1, further comprising a control section that outputs a closing signal to the valve when the pressure reaches the pressure. 4. A pressurized fluid discharge device for a pipe lining method according to claim 1, 2, or 3, wherein the plurality of discharge holes have a spiral shape.