JPS649518B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is mainly aimed at repairing existing pipes, such as gas pipes and water pipes, while still in their installed state, by sealing the inner surface of pipe leakage points and pipe joints. The present invention relates to a support frame structure for sealing confirmation, which is used when confirming whether or not the repair by the sealing member has been reliably achieved when the sealing repair is performed by pasting a member.

[Prior Art] Conventionally, as a type of repair method for repairing existing large-diameter pipes from inside the pipe while it is being installed, for example,
As described in Publication No. 57-16278, an annular elastic sealing member was attached to the inner surface of the pipe joint using an adhesive, and the seal was repaired so that the sealing member covered the inner surface of the pipe joint. something is known.

When such a repair is carried out, it is necessary to check whether the sealing by the sealing member has been reliably achieved after the repair, but no special checking device for this purpose has been proposed so far.

[Problem that the invention seeks to solve]

When providing an instrument for checking the sealing after the above-mentioned repair, the confirmation instrument must first seal the end of the adhesive part of the sealing member affixed to the inner surface of the pipe so that leakage at the adhesive part can be confirmed. It is necessary to seal the adhesive end by pressing the adhesive end against the inner surface of the tube over the entire circumference, thereby reliably sealing the entire circumference of the adhesive end.

In addition, the confirmation equipment is required to be able to be easily carried into and out of the pipe, and to be able to create test conditions that allow leakage to be confirmed immediately by simple operations after repair.

An object of the present invention is to provide a support frame structure for sealing confirmation that can satisfy the above-mentioned requirements.

[Means for Solving the Problems] The present invention is characterized by having the following configuration as a means for achieving this object.

That is, the present invention provides: (A) Semi-arc-shaped split support frames each having a concave annular groove formed in the circumferential portion are hingedly connected at their abutting ends so as to be bendable to form one annular support frame. (B) A holding member is provided to hold the support frame in a V-shaped state bent at the hinge portion and in a linearly extended state, and a holding member is provided in the annular groove of the circumferential portion. (C) The supporting frame is fitted with an elastic tube and an annular elastic ring arranged around the outer circumference of the tube. When the caster rolls in contact with the caster and the support frame is extended linearly and is aligned with the adhesive end of the sealing member affixed to the inner surface of the tube at the use position inside the tube, the elastic ring is inserted through the elastic tube. The elastic tube is characterized in that the elastic tube is provided with air pressure fitting means so that it can bulge out of the annular groove.

[Effect]

In such a configuration, the annular support frame can be folded into a V-shape and moved within the pipe using casters, so that it can be easily carried into and out of the pipe.

In addition, at the use position inside the pipe, the support frame is extended linearly to form an annular shape, and this can be installed along the adhesive end of the sealing member affixed to the inner surface of the pipe. Since the elastic ring can seal the adhesive terminal by pressing it against the inner surface of the tube over the entire circumference through the tube, it is possible to reliably establish leakage test conditions at the bonded portion of the sealing member attached to the inner surface of the tube. .

Therefore, for example, if a leakage test space is formed in the bonded area between the sealing member and the inner surface of the tube inside the pressure point of the bonded end, air can be pumped into this test space using a tool such as a syringe needle. It becomes possible to determine whether or not sealing by the sealing member has been reliably achieved by measuring the air pressure by means such as blowing.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 denotes a support frame in which semicircular arc-shaped split support frames 2 and 2' are connected to each other by hinges 3 and 3' at their abutting ends to form one annular structure. A concave annular groove 4 is formed in the circumferential portion, as is clear from the cross section in FIG. 2, and an elastic tube 6 such as a rubber tube (for example, a bicycle tire tube) is inserted into the inside of the annular groove 4. An elastic ring 5 made of rubber or the like and having a rectangular cross section is fitted on the outside thereof. As a means for introducing and extracting air from the elastic tube 6, a cap 7 projects inside the support frame 1 through a guide hole provided on the inner peripheral side of the annular groove 4.

Further, the hinges 3, 3' are provided with engagement rings 8, 8' at both ends thereof, to which both ends 9a, 9a' of the engagement element 9, which has both ends bent into a hook shape, can be attached and detached. It is designed so that it can be inserted into the Further, inside the support frame 1, each support frame member 2, 2' is provided with a wheel mounting tube 10, 10, respectively, into which a threaded shaft 12 with a caster 11 attached to one end is inserted and a nut 13 is inserted. , 13'. Furthermore, a hook bracket 15 for the turnbuckle 14 is provided on the inner periphery of the support frame 1. The turnbuckle 14 has the bracket 1 attached to the end of the rod 16 screwed on both sides thereof.
The hook 16a is inserted into and engaged with the hole 15a of No.5. Note that the reference numeral 17 in the figure is a handle used when carrying the support frame 1.

Next, the usage situation of the above-mentioned support frame structure will be specifically explained.

A sealing member C is adhered to the inner wall B of the pipe corresponding to the pipe joint A using an adhesive D using another repair tool, as shown in FIG. In this case, a plurality of annular ribs E are formed on the outer periphery of the sealing member, and adhesive D is applied in the required space between the ribs E.
is filled, and some spaces between the ribs E are left empty. Further, on the inner periphery of the sealing member C, ribs G for positioning are formed on both sides of the position where the steel retainer ring F is fitted. Further, thin extension ring portions H are formed at both ends of the sealing member C, and the rib E and the extension ring portion H are formed at both ends of the sealing member C.
A space I for leakage testing is formed between the tips of the two.

The support frame structure is bent at the hinges 3, 3' as shown in FIG. and introduced into the tube. In this case, caster 1
1 comes into contact with the pipe inner wall B, and the support frame structure can be easily carried into the pipe.

After the support frame structure has been carried to the position of the sealing member C, the engager 9 is removed, the two divided support frames 2 and 2' are mutually deformed into flat shapes, and the support frame structure is returned to a single annular support frame 1. Therefore, it is held and fixed in that state and placed on the extension ring section H.

In this state, when compressed air is forced in from the air introduction/extraction mouthpiece 7 using an air hose or the like, the tube 6 expands within the annular groove 4 and pushes the elastic ring 5 to protrude outside the annular groove 4. As a result, the tip of the extended ring portion H comes into close contact with the inner wall B of the tube. In this state, air is forced into the leak test space I using a tool such as a syringe needle, for example. By measuring this pressure of air, it is determined whether or not the adhesive D has reliably sealed the inside of the pipe and the pipe joint A. If there is any leakage, repair it again, and after confirming the leakage, fit and fix the retainer ring F.

〔Effect of the invention〕

As explained above, the present invention has a configuration in which the annular support frame 1 is folded into a V-shaped bend at the hinge portion and can be moved within the pipe by the casters 11. Easy to carry in and out.

In addition, at the repair position using a sealing member stuck inside a pipe, by extending the support frame 1 linearly to form an annular shape, it can be installed along the adhesive end of the sealing member, and at the same time, it can be installed by air pressure fitting means. Elastic ring 5 via elastic tube 6
Since the adhesive terminal can be sealed by pressing against the inner surface of the pipe around the entire circumference, it is possible to reliably establish leakage test conditions at the adhesive part of the sealing member attached to the inner surface of the pipe, and it can be used in conjunction with repair of existing pipes. It is possible to improve the efficiency of existing pipe repair work, such as checking for leaks at the repaired part with a simple operation.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention, Figure 2 is a front view showing one embodiment of the present invention;
The figure is a side view of the same, FIG. 3 is a side view of the folded state, and FIG. 4 is a longitudinal sectional side view showing the state of use. 1... Support frame, 2, 2'... Divided support frame, 3,
3'... Hinge, 4... Annular groove, 5... Elastic ring, 6... Elastic tube, 7... Air introduction/extraction base, 8, 8'... Engaging ring, 9... Engaging element ,
9a, 9a'... end, 10... wheel mounting tube, 11
... Caster, 12 ... Screw shaft, 13, 13'...
...Nut, 14...Turnbuttle, 15...Bracket, 15a...Hole, 16...Rod, 16a
... Hook, 17 ... Handle, A ... Pipe joint part, B ... Pipe inner wall, C ... Sealing member, D ...
...adhesive, E...rib, F...retainer ring,
G...Rib, H...Extension ring, I...Leakage test space.

Claims (1)

[Scope of Claims] 1. One annular support frame is constructed by bendably connecting semi-arc-shaped split support frames each having a concave annular groove formed in the circumference at their abutting ends, A holding member is provided to hold the support frame in a V-shaped state bent at the hinge portion and in a linearly extended state, and an elastic tube is provided in the annular groove of the circumferential portion. , and an annular elastic ring disposed on the outer periphery of the support frame, and the supporting frame is fitted with casters that roll in contact with the inner surface of the tube when the tube is bent into the V-shape and carried into the tube. , so that the elastic ring can bulge out of the annular groove via the elastic tube when the support frame is stretched linearly and aligned with the adhesive end of the sealing member affixed to the inner surface of the tube at the use position inside the tube. A support frame structure for sealing confirmation, characterized in that an elastic tube is provided with air pressure fitting means.