JPS5839922A - Internal pressure testing device for large diameter pipe joint - Google Patents

Abstract

PURPOSE:To exactly execute a test, and also to simplify its handling, by compressing an ''O'' ring in the pipe axial direction, deforming it, and sealing the pipe inside surface and the outside surface of an internal pressure test ring body. CONSTITUTION:At first, by ring supporting arms 13-13'' of a frame system attachable and detachable truck, and internal pressure test ring is supported by adjusting a position by a bolt 14 so that the pipe inside surface and the ring hold an almost equal interval, the truck is moved in the pipe to a position where the truck is tested, the ring is positioned centering around the joint, and is solidified by bolts 11, 11'. Subsequently, an internal pressure test ring body 1 and a holding ring 2 are mutually clamped by clamping a bolt 6, and by a projecting part 4 and a projecting part 5, an ''O'' ring 8 installed between them is compressed and deformed, and a space between the outside surface of the internal pressure test ring body and the pipe inside surface is sealed completely. Subsequently, a fluid is pressed in from a fluid feed port by opening an air vent nozzle 9, and the nozzle is closed after confirming that the fluid flows out from the nozzle 9, by which a pressure test is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to rounding 011tK of an internal pressure test using internal fluid pressure of a joint of a large mouth tube.

As an internal pressure testing device for a subgonal and cathode joint, one having a structure as shown in FIG. 1 has been used. Figure 1(a) is the side'
fIJI! , (b) is a front view, ((1) is an enlarged view of part A in (a). In the figure, P is a large diameter pipe (j1 hand 7 langage part not shown), 1 is the main body of the tube to be tested for internal pressure, 2 is a round presser ring that is located outside the internal pressure test ring main body 10 and is fixed on its outer periphery to press down the rubber cylinder; 5 and 3' are rubber rings with wedge-shaped cross sections; 4 is the outer periphery of the internal pressure test ring main body 1; 9 ring-shaped convex local parts provided in , 5 is a presser ring 2
The protruding portion 6 is a round bolt that fastens the internal pressure test ring body 1 and the holding ring 2 together. Reference numeral 7 denotes a wax vent provided in the internal pressure test ring body, and a pressurizing port (not shown) is provided at a symmetrical position below the wax vent.

Due to the eccentric position described above, the inner pressure test ring is installed so that the inner pressure test of the pipe joint part is performed. When tightened with the main body 1, pressure is applied by the protrusion 4 of the internal pressure test ring main body and the protrusion s5 of the holding ring 2, and the wedge action of the rubber rings 5 and 3I creates a seal between the pipe and the internal pressure test ring main body. The fluid is then pressurized through the pressurizing port. When pressurizing, remove the air between the p-pipe and the internal pressure test ring body, and bleed the air)
Leave the air vent open until you see the fluid coming out, then close it.

The conventional internal pressure testing device described above has various problems as shown below, and improvements have been desired.

1) It takes a lot of effort to attach the rubber ring and put the shoes on.

Since the rubber ring has a sliding structure, it is easily damaged and worn out.

Since the tightening rubber ring is a special specification, it is expensive.
1. Can't let the air out of the top of the hand.

As the size of the equipment increases, handling and assembly of the equipment become more difficult.

Zero Hatsu WJ4 Company proposed to eliminate the shortcomings of the above-mentioned quality O equipment, to ensure that tests could be carried out with a simple structure, and that Hydnung would provide an internal pressure testing equipment for A & Okago pipes and mochis. target

The internal pressure test device for large-diameter pipe joints of the present invention (1) attaches to the outer periphery of the internal pressure test ring body and compresses the 90 ring in the pipe axial direction with a holding ring; (2) Providing a protruding air vent nozzle at the top of the outer surface of the internal pressure test ring body; (3) Internal pressure test. This system is characterized by the fact that the internal pressure test ring is transported and installed using a frame-type removable trolley that has ring support arms and position adjustment bolts, is equipped with a counterweight, and has rollers for moving inside the pipe. The details will be explained with reference to an example diagram.

FIG. 2 is a diagram showing an example of the internal pressure test ring of the device of the present invention.
FIG. 2(&) is a survey view of the internal pressure test ring body (viewed perpendicular to the tube axis), and FIG. 2(b) is a front view. The figure (@) is the figure (
- This is an enlarged detailed view of part A, with the presser ring added. The figure (the figure) is a diagram showing the bolt attachment state of the figure (@) part.

In the figure, 1 is an internal pressure test ring body, and 2 is a holding ring. The presser foot 9 ring may be made as a single unit, or it may be divided into circles around the circumference. Reference numeral 4 denotes two protrusions extending around the outer periphery of the internal pressure test ring main body so as to be located to the left and right in the direction of the pipe axis with the joint to be tested as the center; O ring, 5a presser ring O is the protruding part. P indicates tube and F indicates 7 lunges.

9 is an air bleed nozzle protruding from the internal pressure test ring body 101 [9] 1G is a fluid supply pressurizing port placed at a symmetrical position below the air bleed nozzle; 06 is the internal pressure test ring body and a presser Numerals 11 and 11' are position adjustment bolts for supporting the internal pressure test ring at uniform intervals within the pipe.

SWJ is a diagram of a V-m2 detachable cart for transporting and installing an internal pressure test ring in a pipe, (transferred) is a side view, and (b) is a front view. In the figure, the 12th company's trolley is assembled, 14 is the position tlll1M O bolt, 15 is the trolley for running inside the O area, and the 16th company is a counter for measuring the weight and strength of the internal pressure test ring supported by arms 13 to 16''. When using the internal pressure test device for large-diameter pipe joints made by WA, which is a weight, first, the 1-ring support arm 13 of the frame-type detachable trolley
13" internal pressure test ring (loosely assembled ring body 1, O-ring 4, and presser ring 2) on the inner surface of the tube,
bolts 14 so that they maintain approximately equal spacing.
Adjust the position and support, move the trolley inside the pipe to the joint position where the test will be performed, position the ring around the joint position, tighten it, and then tighten the bolts 11 and 11' to check the relationship between the pipe and the ring. Fix the ring while adjusting its position.

The ring can be easily attached and removed to move it as needed.

Next, tighten the bolt 6 to tighten the internal pressure test ring body 1 and the retainer ring 2, and then tighten the protrusion 4 on the internal pressure test ring body 1.
The convex parts 5 and K of the presser ring 2 compress and deform the O-ring 8 installed between them. Figure 4 (-company 0
The state when 80 rings are set (before deformation) is shown, and the same <(
b) shows a state in which the ring is deformed due to compression like an O-ring.Due to the deformation of the Q9 ring, a complete seal is created between the outer surface of the internal pressure test ring body and the inner surface of the tube. Although the O-ring is shown as solid in the figure, it may be hollow.

Next, pressurize the fluid through the fluid supply pressurization port 10 through the air release nozzle 9, and press the fluid into the nozzle 9) #1 body 0!1! The nozzle is closed after seeing the discharge, and a pressure test is performed.

The internal pressure test conducted using the above energized device of the present invention is as follows:
Compared to the case of using conventional equipment, it takes less time to install the O-ring and assemble the internal pressure test ring, and there is no need to move or install the internal pressure test ring. 2! Venting is done almost completely to the top.

In addition, it has various advantages such as being more cost-effective than the conventional method in terms of specifications, durability, and the use of an O-ring.

[Brief explanation of drawings]

Figure 1 is a diagram of a conventional internal pressure testing device, where (&) is a side view;
(b) is the normal am, and (e) is the A15O enlarged view of (a). Figure 2 is an enlarged view of the internal pressure test ring of the internal pressure testing device of the present invention, (&) is a side view, (b) is a front view, (C) is (a)
An enlarged view of the OA part, (force is a diagram showing the state of bolt attachment in part (C). Fig. 3 is a diagram of a frame type detachable trolley of the device of the present invention, (a) is a side view, and Cb) is a diagram showing the state of bolt attachment in part (C). Figure 4 is a front view showing the deformed state of the O-ring, (a) Id
OP: Large diameter pipe, F: Tulange, 1: Internal pressure test ring body, 2: Holding ring, 3, 3' comb ring, 4: Convex ring body Part, 5: Convex part of presser ring, 6: Tightening bolt, A:
Air bleed, 8, 8'09, 9: Air bleed nozzle,
10: Fluid supply pressurization port, 11: Position adjustment bolt, 12:
Bogie frame, 15, 13'. 13'I": Support arm, 14: Position adjustment bolt, 15: Travel roller, 16: Counterweight. Agent: Patent attorney Masaru Sato Figure 1 (0) tb)

Claims (1)

[Claims] In an internal pressure testing device using the internal fluid pressure of the large-mouthed rear tube 0@hand, (1) the outer circumference Km of the internal pressure test ring body is attached, and the 90 ring is compressed in the direction of the tube axis using the holding ring, and the O-linong y'to* is used. By giving the maple side an oval shape deformation, it is possible to seal both the inside of the pipe and the outside of the internal pressure test cinder body. (3) Internal pressure test 9y
For transportation and installation inside the pipe, a frame-type attached vehicle is equipped with an internal pressure test ring support arm and a bolt for position adjustment, a weight is mounted, and a p-ra for movement inside the pipe. 4I Internal pressure test for large diameter pipe joints with mold.