JPH0134799Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to an improvement plan for the chemical liquid discharge port of a pipe leak sealing packer that seals a leak in a pipe from the inside.

Various types of pipes, such as sewer pipes, often develop leaks, especially at their joints. In the days when television cameras and units for sealing the inside of pipes were not yet developed, the first step in repairing water intrusion or sewage seepage was to locate the approximate location of the infiltration point. They had to predict the leakage, dig along the line of the next pipe, find the leak, and repair it. However, this method is time consuming and expensive when repairing defects in underground lines. Also, it is very difficult to accurately locate the leak in the pipe. As a result, various experiments have been carried out in search of better ways to locate leak joints, and pipe lines equipped with lighting units have been used to inspect the pipe lines internally for flaws or underlying damage. A sealed camera similar to a television camera was devised that could be moved inside the . Once a flaw or leak in a pipe is detected and pinpointed by a camera, a hole is drilled near the leak and a coagulant is pumped through the conduit to seal the pipe and repair the leak. can do.

Such a pipe leak sealing machine is proposed, for example, in Japanese Patent Publication No. 16650/1983. The pipe leak sealing machine is covered with an airtight inflatable skin,
It has a pair of hollow casings with a skid mounted adjacent to one end of each skinned casing and the other end of each casing having a center ring. are placed facing each other. Connecting devices such as bolts are threaded through hollow sections of the casing from one skid to the other, and the entire device is bolted together. The inflatable skin covering the casing is closed at both ends by tightening skids together, which are tightened by tightening diagonally serrated edges on the distal ends of the casing. , along with the overlapping parts of the skids,
The skins are tightened to each casing. The overlapping portions of the skids are angled from the distal end of the casing and are tightened to uniformly press the skin against the diagonally serrated edges of the casing. A center ring is provided on each side for simultaneously tightening and sealing the other end of the inflatable skin to the other end of each casing in the same manner.
It has similar overlapping edges. The unit can be easily disassembled by loosening the bolts that pass through the skids, replacing worn or damaged parts, and reassembling by tightening the bolts. Therefore,
There is no need to cut the inflatable skin to avoid the common hassle of tearing or abrasion of the inflatable skin in situations where the inflatable skin is rapidly manipulated. Air is compressed and directed through the casing to inflate the inflatable skin and create a space between the center ring and the interior of the tube.

Air is also blocked by a pair of inflatable skins and a rapidly solidifying grouting agent is pumped through the center ring for sealing action, as shown in FIG. 2 within tube 11. FIG. Here, the pair of skins 12 in an expanded state are
It is a bag, usually a flat, annular skin or sleeve, that is inflated by air pressure. At each end of the packer 10 there are skids 13 and 14 having a plurality of skid legs for sliding the packer 10 into the tube 11 without inflating the skin 12. center ring 16
is installed between the inflatable skins 12, and a pair of liquid medicine discharge ports 17 are attached thereto. Connecting device 20
A hose 18, shown entering one end of the packer 10, is a pneumatic or other fluid pressure line that connects to and passes through the casing located below the skin 12.
However, this casing is not visible in this view. Thus, by applying pressure through hose 18, the two skins 12 simultaneously expand and contract simultaneously. A pair of other hoses 21
and 22 are also shown within packer 10 to pass grouting chemicals to seal flaws and leaks within tube 11.

Hoses 18, 21 and 22 extend along the length of pipe 11, which is usually an underground pipe;
are connected to the ground surface or to the inlet of an underground pipe in which the equipment for delivering the chemical agent to the pneumatic and hoses 21 and 22 is located. The chemical agent entering the hoses 21 and 22 passes through the chemical outlet 17 and the ring 16, and then enters the pipe 1.
1. Fill the space 23 created between the ring 16 and the two skins. Bolt 24 is nut 25
In order to bolt the devices together, they are passed from skid 14 to skid 13. This patcher is a targeted seal to ensure the exact location of the leak and, if possible, position the patcher over the spot so that the ring 16 is directly above the leak. It operates by locating flaws in the tube 11 using a device such as a television camera, and the skin 12 is activated by air pressure passing through the hose 18 to provide a space 23 to block the leak. The expanded chemical agent is then injected through the hoses 21 and 22 and the chemical outlet 17 under sufficient pressure to force it into the leak in the tube.

Preferably, the chemical agent quickly coagulates or solidifies, so that the packer can be moved to the next leak in the pipe.

"Prior Art" The above-mentioned chemical liquid discharge port 17 has conventionally been constructed of a check valve as shown in FIG. 3.

That is, the base body 3, which is fitted into the opening of the through hole 1 formed in the wall of the ring 16 to which the hose 21 or 22 is connected, and which is secured with a screw 2, has a mortar-shaped valve seat surface 3a. A valve 4 with an O-ring 9 attached thereto is assembled in such a manner as to push back the concave portion of the mortar, and a rod 5 hangs down for a predetermined length from the lower surface of the valve 4, and a baffle plate 6 is secured with a nut at the lower end of the rod 5. 7 and 7', and a pressing spring 8 is interposed between the baffle plate 6 and the base body 3.

Therefore, due to the force of the urging spring 8, the valve seat surface 3a
The valve 4 that is in close contact with the hose 21 or 22
When the chemical liquid pumped inside hits the baffle plate 6, it lifts up and creates a clearance, forming a chemical liquid leakage path.

``Problems to be solved by the invention'' However, in the case of the check valve having the above configuration, the area of the clearance part forming the chemical liquid leakage path is large, and the biasing spring 8 is exposed in the middle of the chemical liquid leakage path. Because of this, the discharged chemical solution that quickly becomes coagulated and solidifies adheres to the valve, between the valve seats, and the pushing spring 8, inhibiting adhesion and weakening the spring force, making it impossible to maintain the valve closing action for a long time, and causing frequent Maintenance is required, and cleaning the deposits is not easy.

``Means for solving the problem'' This proposal was made in view of the above-mentioned circumstances, and its gist is to provide a nozzle with a through hole in the ring wall and a discharge hole in the side. A nozzle fitting is placed in the center of the plate part, a rubber tube is placed in close contact with the side periphery of the nozzle part, and a cylindrical body whose inner diameter is gradually increased from the outside of the rubber tube to the upper half with the inner diameter facing the opening is tightened. The point is that the tool is screwed on.

"Effect", "Example" This will be explained in detail below based on the drawings.

Figure 1 is a longitudinal cross-sectional view of the chemical liquid discharge port of the present invention.
0 is a nozzle metal fitting that is dropped into a through hole 1' formed in the wall of the ring 16, and this is a nozzle part 32 that is inserted into a plate part 3 with discharge holes 31 provided intermittently on the side surface.
3. It stands up in the center, and the bottom has an O
It is preferable to include a ring 34.

35 is a rubber tube attached closely to the side circumference of the nozzle portion 32.

Reference numeral 36 denotes a cylindrical fastener that is screwed into the hole 1' on the outside of the rubber tube 35 to hold down the plate portion 33, and the inner diameter of this is gradually increased from the upper half toward the opening. .

Therefore, the pressure-fed chemical liquid is discharged from the discharge hole 31 by pushing the rubber tube 35 wider to form a leakage clearance, and the leakage clearance is such that the inner diameter of the cylindrical body fastener 36 opens from the upper half. This is ensured by gradually increasing the diameter towards the end.

"Effects of the Proposal" If the main proposal is based on the above-mentioned structure, various effects as listed below will be produced.

A simple structure that does not use springs etc. achieves reverse prevention.

Since the leakage path of the chemical liquid is a short streak-like path, there is almost no adhesion, which is extremely advantageous in terms of maintenance.

Even if maintenance is required, it is extremely easy to clean the deposits due to the structure, and the rubber tube 35 (valve) can be easily replaced.

This is convenient because clogging in the leakage path can be easily eliminated by feeding the chemical solution under pressure or by air feeding.

Production costs are low.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the present discharge port, FIG. 2 is an explanatory diagram of a pipe leak sealing packer, and FIG. 3 is a longitudinal sectional view of a conventional discharge port. Explanation of symbols, 1...through hole, 2...screw fastening,
3...Cap body, 3a...Valve seat surface, 4...Valve, 5...
... Rod, 6 ... Baffle plate, 7, 7' ... Nut stop, 8 ... Pressing spring, 9 ... O-ring, 1
0...Patz car, 11...Tube, 12...Skin,
13, 14... skid, 16... ring, 17
...Medical solution outlet, 18...Hose, 21, 22...
...Hose, 24...Bolt, 25...Natsu, 3
0...Nozzle metal fitting, 31...Discharge port, 32...Nozzle portion, 33...Plate portion, 34...O ring, 35...Rubber tube, 36...Cylinder body fastener.

Claims (1)

[Scope of utility model registration request] A nozzle fitting with a nozzle part with a discharge hole perforated on the side that stands up in the center of the plate part is dropped into the through hole drilled in the center ring wall of the Patsucar, and a rubber tube is tightly attached to the side periphery of the nozzle part. Furthermore, from the outside of the rubber tube, a cylindrical fastener whose inner diameter gradually increases in diameter is screwed onto the upper half of the tube, the inner diameter of which is gradually increased toward the opening.