JPS6410432B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal cable sending device used for measuring the location of water leaks in water pipes.

As shown in FIG. 1, as a water pipe leak position measurement method, a joint box 4, first and second water leakage sound sensors 5 are placed in a water pipe 1 and flowing water 2 having the water pressure and flow velocity shown by the arrows. , 6, and the windsock 7, the water leakage sound sensors 5, 6 are arranged in a straight line at a predetermined interval using wires 8, 9, and the first and second water leakage sound sensors are connected via the joint box 4. 5 and 6, and by sending out the signal cable 3, the first and second water leakage sound sensors 5 and 6 are moved downstream of the flowing water 2, and the water leakage occurring from the water leakage point of the water pipe 1 is detected. The sound is detected by the underwater microphones 5a and 6a of the water leakage sound sensors 5 and 6, and these detected water leakage sound signals are transmitted to a measuring device on the ground (not shown) via the signal cable 3, and a known correlation is performed. A method has been proposed for accurately measuring the location of a water leak in a water pipe 1 according to the law.

In this water leak location measurement method, an existing gate valve 10 and an air valve 11 connected to the water pipe 1 are used, a signal cable feeding device 20 is fixed to the air valve 11 via a connecting pipe 12, and the signal cable is wound. Removal device 13
After introducing the signal cable 3 wound into the signal cable feeding device 20 through the pressurized water sealing device 14, the first and second cords of the signal cable are connected to the first and second water leaks, respectively, as described above. sound sensor 5,
6, and then open the gate valve 10 to fill the air valve 11, the connecting pipe 12, and the signal cable sending device 20 with the flowing water 2, and then connect the guide tube 15 to the signal cable sending device 20. , are inserted into the flowing water 2 through the connecting pipe 12, the air valve 11, and the gate valve 10 and fixed to the signal cable sending device 20, and are inserted into the flowing water 2 through the guide pipe 15. 6, 5, the joint box 4 and the signal cable 3 are inserted and moved in this order by operating the winding handle 16 of the signal cable winding device 13 and the rotation handle 21 of the signal cable feeding device 20.

Underwater microphone 5a of water leakage sound sensor 5, 6,
When 6a detects the water leakage sound generated from the water leakage point of the water pipe 1, these detected water leakage sound signals are transmitted to the measuring device on the ground via the first and second cords of the signal cable 3, and this measurement The water leakage sound detection time difference between the water leakage sounds detected by the first and second water leakage sound sensors 5 and 6 is calculated by the device, and this water leakage sound detection time difference and the length between the first and second water leakage sound sensors 5 and 6 are calculated. The length from the water leakage point of the water pipe 1 to the first water leakage sound sensor 5 is determined based on the distance and the propagation speed of the leakage sound in the running water 2, and the length from the guide pipe 15 in the running water 2 to the first
The position of the water leak in the water pipe 1 is measured by adding the length of the signal cable 3 to the water leak sound sensor 5.

As described above, in the leak measurement method using the known correlation method, which uses two water leak sound sensors to detect the difference in water leak sound detection time and measure the water leak position, the level of the water leak sound generated from the water leak point is This system has the great feature that the leak position can be reliably measured not only when the water leak sound level is steeply high, but also when the water leak sound level is low over a wide area around the leak location.

Therefore, the signal cable sending device 20 used for water pipe leakage measurement described above is the pressurized water sealing device 1.
A signal cable 3 introduced through 4 is connected to a water pipe 1
In addition to having the function of sending water 2 filled with flowing water 2 into the water pipe 1 without slipping and unwinding the signal cable 3 in the water pipe 1, it also has the function of installing a pressurized water sealing device 14 and a connecting pipe 15. It is required that the water leakage sound sensors 5, 6 can be connected to and removed from the underwater microphones 5a, 6a via the joint box 4 of the signal cable 3.

The present invention is a novel system that allows a signal cable to be introduced through a pressurized water sealing device when the water pipe is full of running water, and the signal cable can be sent out into the water of the water pipe and then rewound from the water of the water pipe. The purpose is to provide a signal cable sending device.

Hereinafter, the present invention will be explained with reference to the drawings. Figure 2,
FIG. 3 is a partially cutaway front view of an embodiment of the signal cable sending device according to the present invention, and a sectional view taken along the line - - of FIG. 2, where the same parts as in FIG. It is attached. In addition, in the sectional view of FIG. 3, the positions of the rotational force transmission mechanism, etc., which will be described later, are shown expanded for ease of understanding.

In FIGS. 2 and 3, 22 is the chamber 23
and a water chamber 25 formed with the frame 24 and a front chamber 27 formed with the frame 24 and the panel 26.
In the chamber 23 of the water chamber 25,
Pressurized water sealing device 14 fixed with mounting bolts
An introduction opening 30 through which the signal cable 3 is introduced and an exit opening 31 through which the signal cable 3 is sent out to the connecting pipe 12 are provided. In addition, 12a is the connecting pipe 1
2, the flange 12a is
It is fastened to the connecting flange 28 with a fastening bolt. Further, 32 is fixed to the upper end surface of the chamber 23 with a mounting bolt, and has an insertion hole for the support rod 15a of the guide pipe 15 to be inserted into the flowing water 2 of the water pipe 1 through the water chamber 25, the outlet opening 31, and the connecting pipe 12. The mounting pedestal 33 is a pedestal with a thumbscrew on which the support rod 15a of the guide tube 15 is fixed.

Further, in the water chamber 25, there is a cable feed pulley 35 that bends the signal cable 3 from the introduction opening 30 and sends it out into the connecting pipe 12 below from the outlet opening 31, and a groove 36 on the outer circumferential surface of the cable feed pulley 35 to bend the signal cable 3 and send the signal cable 3 into the connecting pipe 12 below from the outlet opening 31. First to fourth cable holding pulleys 40, 42, 44, 46 are arranged to be in even pressure contact with, and these pulleys 40, 42, 44, 46 are
Each presser pulley shaft 40a, 42a, 44a, 46a
A pair of arms 41a, 41b, 43 connected to
a, 43b, 45a, and 45b are integrally and rotatably connected.

Cable holding pulley 40, 42, 44, 46
When the water chamber 25 is filled with the flowing water 2 in the water pipe 1, the signal cables 3 are evenly pressed against the grooves 36 on the outer circumferential surface of the cable holding pulley 35 with the grooves on the respective outer circumferential surfaces, and the signal cables 3 are This allows the cable 3 to be sent out or rewound as if sliding on running water 2.

Therefore, as shown in FIGS. 4A and 4B, the frame body 24 on the introduction opening 30 side of the cable holding pulley 40 and the lead-out opening 31 side of the cable holding pulley 46 are located at symmetrical positions with respect to the feed pulley axis 67. , first and second rotating shafts 49a and 49b are provided which are pivotally attached to the shaft bearing holes 47a and 47b with shaft retaining rings 48a and 48b and communicate with the water chamber 25 and the front chamber 27.

A pin 50a is attached to the end of the rotating shaft 49a on the front chamber 27 side.
An arm 51a is fixed to the arm 51a, a tension piece 54 is engaged to an engaging protrusion 52a fixed to the end of the arm 51a, and a support plate 53a fixed to the frame 22.
A is provided. A boss 38a is fixed to the end of the support plate 53a, and a tension piece 54a is fastened to the boss 38a with a bolt 39a.

A pin 5 is attached to the end of the rotating shaft 49a on the water chamber 25 side.
Arm 56a fixed at 5a, this arm 56
Cable guides 58a and 59a, which also serve as arms, are connected to the arm shaft 57a inserted at the end of the arm 57a and the pulley shaft 40a of the cable holding pulley 40, and sandwiched between the cable holding pulley 40 and the arm 56a. In addition, the cable guides 58a and 59a are
Each surface on the arm 56a side is extended to surround both sides of the signal cable 3 to form a guide surface.

Similarly to the rotating shaft 49a, the rotating shaft 49b also has an arm 51b fixed to the end on the front chamber 27 side with a pin 50b, an engaging protrusion 52b fixed to the end of this arm 51a, and an arm 51b fixed to the frame 22. A tension piece 54b is provided which is engaged with the support plate 53b. Note that a boss 38 is provided at the end of the support plate 53b.
b is fixed, and a tension piece 54b is fastened to this boss 38b with a bolt 39b. Rotating shaft 49
At the end of b on the water chamber 25 side, there is an arm 56b fixed with a pin 55b, an arm shaft 57b fixed to the end of this arm 56b, and a cable holding pulley 4.
6 pulley shaft 46a and cable holding pulley 46
Cable guides 58b and 59b, which also serve as arms, are connected to sandwich the arm 56b. still,
The cable guides 58b and 59b are shaped like the arms 5 so as to surround both sides of the signal cable 3.
Each surface on the 6b side is extended to form a guide surface.

Therefore, when the arm 51a is pulled in the direction of the arrow A by the tension piece 54a, the rotating shaft 49a fixing the arm 51a rotates in the direction of the arrow B, and at the same time the arm 56a fixed to the rotating shaft 49a rotates.
is pulled in the direction of arrow C, and the arms 58a, 59
a pulls the cable holding pulley 40 in the direction of arrow C, and the cable holding pulley 42 is also pulled at the same time. Similarly, the tension piece 54b causes the arm 51 to
When b is pulled in the direction of arrow A', arm 51b
The rotating shaft 49b fixed to the rotating shaft 49b rotates in the direction of the arrow B', and at the same time the arm 56b fixed to the rotating shaft 49b is pulled in the direction of the arrow C'N, and the arm 5
8b, 59b indicate the cable holding pulley 46
It is pulled in the direction of C', and the cable holding pulley 44 is also pulled together with this.

As a result, the signal cable 3 is pressed against the groove 36 on the outer circumferential surface of the cable feed pulley 35 on the side of the introduction opening 30 by the sequential pressure contact force due to the grooves on the outer circumferential surface of the cable holding pulleys 40 and 42, and on the side of the outlet opening 31, the signal cable 3 is pressed against the groove 36 on the outer circumferential surface of the cable feed pulley 35. The pulleys 46 and 44 are pressed against the groove 36 on the outer circumferential surface of the cable feed pulley 35 by the successive pressure applied by the grooves on the outer circumferential surface of the pulleys 46 and 44 .

The signal cable 3 is sent out or rewound with the water chamber 25 filled with water. Therefore, the cable holding pulleys 40, 42, 4
The above-mentioned pressure contact force for the signal cables 3 of 4 and 46 should be such that the signal cable 3 is smoothly sent out and reeled in without slipping on the groove 36 on the outer peripheral surface of the cable feed pulley 35 underwater. It requires

Note that O-rings 37a and 37b are attached to the rotating shafts 49a and 49b, respectively, to prevent water from the water chamber 25 from leaking into the front chamber 27.

The front chamber 27 includes a rotational force transmission mechanism 60 that transmits the forward and reverse rotational force of the rotary handle 21 that rotates the cable feed pulley 35 in forward and reverse directions, and a rotary force transmission mechanism 60 that transmits the forward and reverse rotational force of the rotation handle 21 that rotates the cable feed pulley 35 in forward and reverse directions. Or a reset 75a counter 7 that digitally displays the length of the signal cable 3 to be rewound.
5 are arranged.

The rotational force transmission mechanism 60 includes a handle shaft 62 of the rotating handle 21 that is rotatably supported by a bearing 61 fixed to the panel 26, and a pin 6 at the end of the handle shaft 62.
3, a feed pulley shaft 67 that is fixed to the boss 35a of the cable feed pulley 35, which is supported by a bearing 65 fixed to the frame 24, with a pin 66; Pin 68 at the end
The second gear 69 is pivotally connected to the second gear 69 and meshes with the first gear 64.

The display on the counter 75 indicates that this rotational force transmission mechanism 6
Cross section fixed to the second gear 69 of 0 with a tightening screw〓
A gear 72 fixed to one end of a shaft 71 meshing with the gear 70, a bevel gear 73 fixed to the other end of the shaft 71, and a counter shaft 76 of a counter 75 meshing with the bevel gear 73. The rotation of the cable feed pulley 35 is transmitted to the counter shaft 76 by the bevel gear 74, and the length of sending out or rewinding the signal cable 3 according to the number of rotations of the cable feed pulley 35 is digitally displayed. It's summery. In this case, the counter 75 and the bearing frame 78 are fixed to a counter support plate 77 that is fixed to the frame 24 with mounting screws. Also, the display of the counter 75 is displayed on the panel 26 from the window 79 of the panel 26.
It can be viewed directly through a transparent plate 80 fixed to the.

In addition, in order to prevent the flowing water 2 of the water pipe 1 filling the water chamber 25 from leaking into the front chamber 27, the chamber 2
3 and the frame body 24, an O-ring 85 between the ring body 84 which is pivotally attached to the feed pulley shaft 67 and the feed pulley shaft 67, and an O-ring 85 between the ring body 84 and the feed pulley shaft 67, and the contact surface between the ring body 84 and the bearing 65. A seal ring 82 is attached to each. Note that the bearing 61 includes a sliding bearing 8.
6a and 86b, the bearing 65 has a sliding bearing 87.
a and 87b are attached respectively.

Next, the operation of this device will be explained. First, when starting water leakage measurement of water pipe 1, signal cable 3
It is necessary to connect the water leakage sound sensors 5 and 6 described above in FIG. Therefore, with the casing 22 of the signal cable sending device 20 fixed to the connecting pipe 12, the frame 22
4, the chamber 23 fixed with eight tightening bolts 29 is removed, and the signal cable 3 is introduced into the water chamber 25 from the pressurized water sealing device 14 through the introduction opening 30. This introduced signal cable 3 is fitted into the groove 36 on the outer peripheral surface of the cable feed pulley 35, and the water leakage sound sensors 5 and 6 are connected to the tip of the signal cable 3 via the joint box 4 as described above in FIG. do. On the other hand, the guide tube 15 is also inserted into the water chamber 25 and the connecting tube 12.

In this case, the tension pieces 54a and 54b include the engagement protrusion 52a, the support plate 53a, and the engagement protrusion 52b, respectively.
It is kept in a state where it does not engage with the support plate 53b. As a result, the signal cable 3 is not subjected to pressure contact force due to the grooves on the outer circumferential surface of each of the cable holding pulleys 40, 42, 44, and 46, so it easily slides into the groove 36 on the outer circumferential surface of the cable feed pulley 35 and moves downward. It is sent out to the outlet opening 31.

At this point, the water leakage sound sensors 5 and 6 with the signal cable 3 are in a straight line together with the joint box 4 and the streamer 7, and the tip of the streamer 7 comes into contact with the upper end surface of the air valve 11. Similarly, the tip of the guide tube 15 also contacts the upper end surface of the air valve 11.

In this state, the tension pieces 54a and 54b of the signal cable sending device 20 are connected to the engagement protrusion 52a and the support plate 5, respectively.
3a, the engagement protrusion 52b, and the support plate 53b, and further fixes the chamber 23 to the frame 24. In this case, the counter 75 is set to zero by operating the reset 75a.

When the above preparations are completed, the gate valve 10 and air valve 11 are opened in a predetermined order to fill the water chamber 25 with the flowing water 2 of the water pipe 1, and the guide pipe 15 is inserted into the water pipe 1. Then, fix the support rod 15a with the thumbscrew of the thumbscrew pedestal 33. If the handle 21 is rotated in the forward direction (rotation to the right) in this state, the gear 64 rotating together with the handle shaft 62 rotates the gear 69 in the reverse direction (rotation to the left) due to the operation of the rotational force transmission mechanism 60 of the handle 21. The cable feed pulley 35 is rotated in the opposite direction (rotated to the left) together with the feed pulley shaft 67, and the water leakage sound sensor 5 with the signal cable 3 is installed.
6 can be inserted and moved into the flowing water 2 of the water pipe 1 in the order of the streamer 7, the water leakage sound sensors 5 and 6, the joint box 4, and the signal cable 3, and the length of the signal cable 3 sent out is determined by the cable feed. The counter 75 displays the length according to the rotation speed of the pulley 35 via the gears 70, 72, and bevel gears 73, 74.
It is displayed on the screen and can be read directly by visual inspection.

As described above in detail, according to the signal cable sending device according to the present invention, the signal cable can be sent out without slipping due to the flowing water when the water chamber of the casing consisting of the water chamber and the front chamber is filled with flowing water from the water pipe. Or, a cable feed pulley for rewinding and a plurality of cable holding pulleys are installed in the front chamber, and a rotational force transmission mechanism that rotates the cable feed pulley in forward and reverse directions by rotating a rotation handle, and a signal cable feed length and winding are provided. Equipped with a counter that displays the return length, it is easy to use when measuring the location of water pipe leaks.
This has the effect that the signal cable can be effectively fed out and rewound with a simple operation.

[Brief explanation of the drawing]

FIG. 1 is a device configuration diagram illustrating a water pipe leak position measurement method, FIGS. 2 and 3 are a front view of an embodiment of a signal cable sending device according to the present invention, and a sectional view taken along the line - in FIG. FIG. 4 is an enlarged view of the main parts of the signal cable holding mechanism. 1... Water pipe, 2... Running water, 3... Signal cable, 5, 6... Water leakage sound sensor, 12... Connection pipe, 13... Signal cable winding device, 14... Pressurized water sealing device, 15 ... Guide tube, 20 ... Signal cable feeding device, 21 ... Rotating handle, 22 ...
...Casing, 23...Chamber, 24...Frame, 25
...Water chamber, 26...Panel, 27...Antechamber, 30
...Introduction opening, 31 ... Leading-out opening, 35 ... Cable feed pulley, 36 ... Groove, 40, 42, 4
4, 46...Cable holding pulley, 41a, 41
b, 43a, 43b, 45a, 45b...arm, 60...rotational force transmission mechanism, 62...handle shaft, 64...first gear, 67...feed pulley shaft, 69...second gear, 75...Counter.

Claims (1)

[Scope of Claims] 1. A signal cable feeding device used for measuring the location of water leakage in a water pipe by directly inserting and moving a water leakage sound sensor with a signal cable into the flowing water of the water pipe, comprising: a chamber and a frame; An introduction opening and an outlet opening for the signal cable are provided in the water chamber of the casing consisting of a water chamber and a front chamber formed by the frame and the panel, and the signal cable is introduced from the introduction opening. a cable feed pulley that curves the signal cable and sends it out downward from the lead-out opening; and a plurality of cable feed pulleys connected to each other by arms that press the signal cable into a groove on the outer peripheral surface of the cable feed pulley with a predetermined pressure contact force. A cable holding pulley is disposed, and the front chamber includes a rotational force transmitting means for transmitting the forward and reverse rotational force of a rotary handle that rotates the cable feed pulley in forward and reverse directions, and a cable that is sent out or rewound from the outlet opening. A counter is disposed to display the length of the signal cable, and the rotational force transmission means is a first gear pivoted on an end of a handle shaft of the rotary handle pivoted on a panel of the front chamber. and a second gear pivotally supported on the end of the feed pulley shaft of the cable feed pulley that is pivotally supported by the frame meshing with the first gear, and the water conduit flows into the water conduit from the outlet opening. When the water chamber is filled with flowing water, the signal cable is sent out from the outlet opening into the flowing water of the water pipe or rewound from the flowing water of the water pipe by rotating the rotary handle in the forward and reverse directions. A signal cable sending device comprising: