JPS6021785Y2 - Pipe test jig - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of a pipe testing jig, which can be easily attached at any time when constructing pipes, tanks, etc., and suitably tests its airtightness under high pressure conditions or low pressure conditions. The purpose of the present invention is to provide a jig that is compact and easy to handle.

When laying and constructing pipes, etc., it is important to test their airtightness in order to prevent leakage, but so far, there has been no suitable jig for such testing purposes, and in general, In Japan, water pressure or airtightness tests are conducted after construction of the entire pipeline, which has a considerable length, is completed.

However, when such conventional methods are used, even if a leakage point or a potential leakage point is found in the pipes, it is difficult to repair it because it is only after a series of pipes have been connected and constructed, that is, the effectiveness of the repair is difficult. Compensation from the inside is very difficult and it is not possible to obtain a favorable repair result.

The man-hours and costs inevitably increase. Particularly in the case of piping equipment connected to a tank, its pressure resistance is important, and it is difficult to achieve a sufficient repair effect, which is extremely difficult in terms of technology and cost.

The present invention was devised after repeated studies in view of the above-mentioned circumstances, and it is a method to easily and conveniently test the airtightness of each part as it is constructed, and to proceed with subsequent construction. This allows the construction method to be adopted.

That is, to explain the specific embodiment of the present invention shown in the attached drawings, FIG. Each pipe 21 to 23
The parts that require testing are shown, including the equipment setting part A1 of the piping 21, its curved downward tip part B1, the equipment setting part D in the piping 22, and the attachment part C to the tank 20 in the piping 23, which are important parts that require testing. becomes.

However, the jig of the present invention used for such test purposes is as shown in Figures 2 and 3, and its configuration is a substrate with an opening 11 in the center and a diameter larger than the inner diameter of the pipe. An example of 1 is an elastic ring 2 whose diameter is smaller than the inner diameter of the pipe in the normal state when it is inserted into the inner hole 9 of the pipe body 1 to 23 as described above, and a tapered surface toward the substrate 1. In addition, a through hole 32 is formed in the center of the clamping member body 3, and a male thread 40 is formed on the outer surface of the clamping member body 3 on the substrate 1 side. The provided cylindrical part body 4 is attached as a threaded part body and a through hole part body, and the through hole 41
is adapted to communicate with the through hole 32, and the cylindrical body 4 is connected to the through hole 21 of the elastic ring 2 and the opening 1 of the substrate 1.
1 and protrudes to the other side of the substrate 1, and a nut 5 serving as a tightening means is screwed into the protruding portion.By rotating this nut 5, the elastic ring 2 is moved to the tightening portion. It is compressed by the tapered surface 31 of the body 3 and expands in diameter, and is tightly joined to the surface of the inner hole 9. In this state, the protrusion of the cylindrical body 4 is connected to a fluid source and the inside of the inner hole 9 is expanded. The airtightness of the pipe body having the inner hole 9 is tested by increasing or reducing the pressure.

According to the present invention as explained above, by tightening the nut 5 screwed into the threaded part body, the clamping part body 3 is drawn toward the base plate 1, and the elastic ring 2 is moved outwardly by the tapered surface 31. It is clear that an effective sealing relationship can be formed with the inner surface of the compressed and expanded pipe line body, and the jig itself has a through hole that communicates with the inside of the clamping body 3. Since the body is attached, the test purpose can be easily achieved without requiring any work on the pipe body itself to be applied, and therefore, the test purpose can be easily achieved at each construction site. This makes it possible to check the airtightness of the building at any time to monitor the progress of the construction work, and eliminates the need for testing after the completion of all construction works, which would have been difficult in the past due to the discovery of defects. Since a through hole is formed that communicates with the threaded part body and the clamping part body, it is possible to test the inside of the pipe body by increasing or decreasing the pressure as appropriate, and it is extremely compact and can be handled using a single nut. It is simple enough to be tightened, and furthermore, since the peripheral side of the clamping member body is made into a tapered surface, it has functions and effects such as precise expansion operation of the elastic ring, and the effect is great in practical use. It is an idea.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is an explanatory diagram showing an example of the arrangement of pipe lines for a tank and the locations required for testing, and Fig. 2 is a comparison of test jigs according to the present invention. FIG. 3 is a cross-sectional view of a preferred embodiment applied to a target small-diameter conduit body, and FIG. 3 is a front view thereof. In these drawings, 1 is the base, 2 is the elastic ring,
3 is a clamping part body, 4 is a through hole part body, 5 is a nut, 9 is an inner hole,
Reference numeral 31 indicates a tapered surface formed on the circumferential side of the clamping member, and reference numerals 32 and 41 indicate through holes, respectively.

Claims (1)

[Scope of utility model registration request] An elastic ring to be inserted into the conduit body and a pressure contact body having a tapered surface toward the substrate are positioned on one side of a substrate having a diameter larger than the inner diameter of the conduit body; A threaded body attached to the clamping force body is inserted into the substrate to screw the tightening means together, and a through hole is formed that communicates with the threaded body and the clamping body, and the clamping force is A pipe test jig, characterized in that the peripheral side of the part is a tapered surface for expanding the diameter of the elastic ring.