JP2829843B2 - Pipe and flange weld inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloading pipe which is used when a T-shaped pipe or the like is connected to an unloading pipe connected to an oil tanker, or a general gas pipe or other pipe in the longitudinal direction. And a flange weld inspection apparatus.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
3 are provided. 104 denotes a gate valve, 105 denotes a closing plate insertion portion, and 106 denotes a closing device. Normally, such a pipeline generally uses a gate valve in consideration of pressure loss. And of the pipeline 103 as described above,
In some cases, a T-tube 107 as shown in FIG. 108 is a flange. In this case, first, the flange 108 is welded to the pipeline 103.
An inspection is then performed to determine whether the welding has been completed.

In the case of this inspection, as shown in FIG. 6, a closing plate insertion portion 1 of a gate valve 104 at both ends of a pipeline 103 is provided.
05 and a closing device 106 are inserted into the closing device 106, a fluid such as N ₂ gas is press-fitted over substantially the entire length of the pipeline 103, and a foaming agent, usually a surfactant is added to water at a welding portion of the flange 108. The goodness and the badness of the welding were inspected by applying the melted material and inspecting the foam.

[0004]

However, according to the above-described inspection method, a large amount of fluid such as N ₂ gas is required because the fluid is injected between the gate valve 104 and the closing device 106 over substantially the entire length of the pipeline 103. I do. In addition, since the pressure is increased over substantially the entire length of the pipeline 103, the pressure increase time is long. Moreover, complicated work of inserting the closing plate 107 is required. In addition, N ₂ gas and other fluids are press-fitted over almost the entire length of the pipeline 103 and the pressure is increased, so that the safety is uncertain.

The present invention has been made to solve the above-described various problems, and has as its object the purpose of the present invention.
₍₂₎ Gas and other fluids can be pressed in only a part of the pipeline 103 without being pressed over almost the entire length of the pipeline 103 as described above. And the like, so that the troublesome work is not required, and the safety is much higher than the conventional method, and the pressure rise time of the fluid such as gas is much shorter than the conventional method. ,
An object of the present invention is to provide a flange weld inspection device.

[0006]

Means for Solving the Problems] To achieve the above object Describing this invention it is inserted the flange 1 to the welded pipe, the plug body provided with a closed bolt 2 3; said closure member 3 O accommodated in the notch 18 of
Ring 5; a disk movably fitted to the bolt 2
The O-ring 5 having a circular projection 32 at its end.
A pressure member 4 to be deformed by pressure ; a first nut 6 screwed to the bolt 2 on the side of the pressure member 4 opposite to the plug 3; an opposite side of the bolt 2 to the plug 3 A flange member 10 having a through hole 7 fitted on the side thereof and having seal members 9 provided on both sides of an outer peripheral portion 8; provided on the plug body 3 side of the flange member 10.
Radius of the flange member 10 to be inserted into the flange 1
A guide 34 for preventing movement in the direction ; a second nut 11 screwed to the side of the flange member 10 opposite to the plug 3; a bolt hole 13 fixed to the flange 1 via the flange member 10 A flange having a fluid port 16 provided with the flange 14 at the mouth portion 15; and a fixing member 19 connecting the flanges 1 and 14 to each other. It is a welding part inspection device.

[0007]

The operation of the present invention will be described. First, the plug 3 is inserted into the pipe to which the flange 1 has been welded, and inserted over the welded portion of the flange 1, where the first nut 6 is screwed to press the O-ring 5, and the radially outward And make it close to the inner surface of the tube.

Next, the second nut 11 is slightly tightened, and the
0 is brought into close contact with the flange 1. Then, the flange 14 of the fluid chamber 17 is made to correspond to the flange 1 via the flange member 10, and the two flanges 1, 14 are bolted to the bolt holes 12, 13.
And is fixed by the fixing member 19. And fluid chamber 1
A fluid such as N ₂ gas is press-fitted from a fluid port 16 of the cylinder 7 from a cylinder (not shown). Then, the fluid flows into the fluid chamber 17.
Through the opening 7 to fill the space between the flange member 10 and the plug 3. In this case, a foaming liquid in which a surfactant is dissolved in water is applied to the outside of the weld between the flange and the pipe in advance. In this case, if there is a defect in the welded portion, a fluid such as N ₂ gas is ejected from the defective portion, whereby the foaming liquid foams and a welding defect is identified. The operation of the second embodiment in which the connecting rod 23 is used without using the bolt 2 and the connecting rod 23 and the flange 21 are fixed to each other also works in the fluid port 1.
6, a fluid such as N ₂ gas is press-fitted, a foaming liquid is applied to the welded portion between the flange 1 and the pipe, and the foaming is observed. The present invention is configured as described above,
The Fluid of the N ₂ gas or the like can it be greatly reduced. Therefore, the pressurizing time of the working fluid can be reduced very much. In addition, safety can be improved. Further, the labor for inserting the closing plate 107 into the gate valve 104, the closing device 106, or the like can be omitted.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a flange, which is welded 29 to a pipe 28. Reference numeral 3 denotes a plug, which is formed in a thick disk shape and has a second O-ring 31 in a groove 30 on the outer periphery. Reference numeral 2 denotes a bolt which penetrates the plug 3 and is hermetically fixed by welding. A pressing member 4 having a disk-like shape and having a circular projection 32 at an end is movably fitted to the bolt 2. ing. Reference numeral 7 denotes a fluid passage. As shown in FIG. 2, a notch 18 is formed in a peripheral end 33 of the plug 3 on the pressing member 4 side.
The O-ring 8 is provided with an O-ring 5. The O-ring 5 is pressurized by the protrusion 32 of the pressing member 4, and is pressed against the inner surface of the pipe 28 to be formed airtight. Reference numeral 11 denotes a second nut, which is screwed to the bolt 2.

Reference numeral 10 denotes a flange member, which is movably fitted to the bolt 2. 9 is an outer peripheral portion 8 of the flange member 10
Are sealing members made of an elastic body provided on both sides of the sealing member. 7
Is a passage formed in the flange member 10 for allowing a fluid such as N ₂ to pass therethrough. Next, reference numeral 34 denotes a guide provided on the flange member 10. By inserting the guide into the flange 1, it is possible to prevent the O-ring 5 from being improperly sealed due to the movement of the flange member 10 in the radial direction. it can. Reference numeral 11 denotes a second nut. By turning the second nut 11, it is possible to prevent the plug 3 from being pushed into the pipe by the pressurized fluid. 35 is a loosening prevention nut,
Thereby, loosening of the second nut 11 can be prevented. Next, reference numeral 17 denotes a fluid chamber in the form of a closed container, which has a flange 14 at the mouth 15. Reference numeral 16 denotes a fluid port. The fluid chamber 17 has a flange 36 at the end as shown in FIG.
37 and a case formed by welding as shown in FIG.

In FIG. 1, reference numeral 38 denotes a pressure gauge. Also, the use of the bolt 2 in FIG.
, The position of the plug 3 can be changed. Further, by providing the pressure gauge 38, the pressure in the apparatus can be known. The operation of this embodiment is as follows. A fluid such as N ₂ gas or water is press-fitted from the fluid port 16 using a cylinder or the like (not shown), a foaming liquid is applied to the welding portion 29, and the state of the foaming is checked by checking the foaming state. To inspect. Of course, it is good welding to see no foaming. The device shown in FIG. 3 is used when a fluid of about 1 to 3 atm is used, and the device can be easily manufactured with a simple structure. 1 can withstand a high pressure of 10 to 20 atm. Also, in FIG. 1, the two types of O-rings can be used to make the O-ring sufficiently airtight.

[0012]

As described above, according to the present invention, the amount of the fluid such as N ₂ gas used can be extremely reduced as compared with the prior art. Therefore, the time for increasing the pressure can be greatly reduced. Also, since a fluid such as N ₂ gas may be partially press-fitted, safety can be improved as compared with the related art. Further, the troublesome work of using the conventional closing plate 107 can be omitted. Notch of plug 3
The O-ring 5 is provided on the pressing member 4.
And presses against the inner surface of the pipe 28.
It is formed airtight. A guide provided on the collar member 10
34, the flange is inserted into the flange 1
The sealing of the O-ring 5 is not possible due to the radial movement of the material 10.
It can be prevented from becoming good.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a cross-sectional view of a pipe when a flange weld inspection device is used.

FIG. 2 is an enlarged detailed view of a portion of FIG. 1;

FIG. 3 is a view showing a second embodiment of the present invention and corresponding to FIG. 1;

FIG. 4 is a view showing a third embodiment of the present invention and corresponding to FIG. 1;

FIG. 5 is a view showing a case where a T-tube is provided in the middle of a conventional unloading pipeline of an oil tanker.

6 is a view showing a conventional method for inspecting a welded portion of a flange in the apparatus shown in FIG.

FIG. 7 is a view showing the inspection method of the present invention in the apparatus shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flange 2 Bolt 3 Plug 4 Pressure member 5 O-ring 6 First nut 7 Through hole 8 Outer peripheral part 9 Seal member 10 Flange member 11 Second nut 12 Bolt hole 13 Bolt hole 14 Flange 15 Mouth 16 Fluid port 17 Fluid Chamber 18 Notch 19 Fixing member

Claims (1)

(57) [Claims] 1. A are inserted a flange 1 to the welded pipe, bolt 2 stopper provided in sealed 3; of said closure member 3
O-ring 5 housed in notch 18;
The disc 2 is movably fitted to the belt 2 and has a circular projection at the end.
Pressing to deform the O-ring 5 by pressurization having an indentation 32
Member 4 : a first nut 6 screwed to the bolt 2 on the opposite side of the plug 3 of the pressing member 4 ; fitted on the opposite side of the plug 3 of the bolt 2. Member 1 having an opening 7 and sealing members 9 provided on both sides of an outer peripheral portion 8
0; the flange provided on the side of the plug 3 of the flange member 10;
Move the flange member 10 in the radial direction to be inserted into the flange 1
A guide 34 for preventing ; a second nut 11 screwed to the side of the flange member 10 opposite to the plug 3; a flange 14 having a bolt hole 13 fixed to the flange 1 via the flange member 10; The flange 14 was provided on the mouth 15,
A fluid chamber 17 having a fluid port 16;
4. An apparatus for inspecting a flange weld of a pipe, comprising: