JP2000018451A - Leaked gas-sealing belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce burden to a worker in inspection/maintenance of a piping by providing a leaked gas-sealing belt which can easily be attached and detached. SOLUTION: This leaked gas-sealing belt 9 is wound around flanges 2, 2 butted against each other at a joint portion of pipings 1, 1, so as to cover the portion between the flanges. The belt 9 is composed of a belt body 10 having length substantially the same as peripheral length of the flanges 2, 2, and a mounting/demounting means 11 which can attract longitudinally one end of the belt body 10 to the other end and mount/demount them with each other, and a nozzle 12 which is projected on a front surface of the belt body 10 at a longitudinally appropriate portion for communicating the rear surface of the belt body 10 with the front side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leakage gas sealing belt.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional liquefied natural gas (LN).
2 shows a joint portion between the pipes 1 and 1 constituting the transfer line G), and the two pipes 1 and 1 are fastened with bolts 3 and nuts 4 by abutting flanges 2 and 2 of each other. .

[0003] A bulged portion 5 projecting toward the mating flange 2 is formed annularly on the inner peripheral side of the bolt fastening position on the opposing surfaces of the flanges 2 and 2. When the flanges 2 and 2 are fastened with the nut 3 and the nut 4, the bulging portions 5 and 5 of the pipes 1 and 1 are firmly pressed against each other to enhance the adhesion.
Advanced sealing properties are maintained.

When the bulging portions 5 and 5 are formed on the opposing surfaces of the flanges 2 and 2 as described above, a slight gap is formed on the outer peripheral side of the flanges 2 and 2. Normally, even if such a gap is formed, the sealability should be kept good by the strong press contact between the bulging portions 5 and 5 described above. Adhesive tape 6 to cover the gap between 2,2
Is wound around the flanges 2 and 2, a hole is formed in an appropriate position of the adhesive tape 6, a gas sampling tube 7 is inserted, and a small gas detecting device 8 of a suction type is appropriately carried to carry the gas detecting device. The gas collection tube 7 is connected to 8 and the internal gas sealed with the adhesive tape 6 is sucked to check whether or not the LNG vaporized gas has leaked.

The adhesive tape 6 wound around the flanges 2 and 2 is not for preventing the vaporized gas from leaking, and should be used when the LNG vaporized gas leaks. This is only for sealing the internal gas so that the leakage of the adhesive tape can be reliably detected, so that the adhesive tape 6 does not require a particularly high sealing property.

[0006]

However, in the conventional means as described above, the adhesive tape 6 must be peeled off and removed at the time of maintenance and inspection of the pipes 1 and 1, and the removal of the adhesive tape 6 is troublesome. In addition, since the work of rewinding the adhesive tape 6 again after the completion of the maintenance and inspection work was very troublesome, in a plant or the like having a large number of pipes 1 and 1, a large amount of time and labor was required for the maintenance and inspection work of the pipes 1 and 1. In short,
This is a heavy burden for the worker who performs the maintenance and inspection work on the pipes 1 and 1.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides a leakage gas sealing belt capable of easily performing removal and installation work, thereby reducing the burden on a worker in maintenance and inspection work of piping. It is intended to be.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a leak-tight gas seal belt wound around both flanges so as to cover between flanges abutted at a joint portion of pipes. A belt body having a length substantially equal to the length, attaching / detaching means for pulling the other end to one end in the longitudinal direction of the belt body, attaching and detaching the belt body appropriately, and a front side at an appropriate position in the longitudinal direction of the belt body. And a nozzle protruding from the main body to communicate the back side of the belt body to the front side.

The belt body is wrapped around the flanges so as to cover the flanges abutted at the joints between the pipes, and the other end is pulled toward one end in the longitudinal direction of the belt body by the attaching / detaching means. If it is installed, even if the fluid flowing in the piping leaks between the flanges, the vaporized gas of the leaked fluid or the leaked fluid itself (when the fluid is gaseous) is sealed by the belt body. Therefore, for the nozzle provided in the belt body,
Carry the suction-type small gas detection device appropriately, connect the gas detection device via a gas sampling tube, and suction the internal gas sealed in the belt body to check whether the fluid has leaked. Inspection becomes possible.

When it becomes necessary to remove the belt body during the maintenance and inspection of the piping, the belt body is immediately removed by releasing the attaching / detaching means and detaching the other end from one end in the longitudinal direction of the belt body. It is possible.

Further, in the present invention, the belt body is pivotally attached to the end of one end in the longitudinal direction of the belt body in such a manner as to be folded back to the opposite end side so as to be overlapped on the surface of the one end, and to have a required length from the pivot attachment portion. A lever provided with a hook-shaped clasp toward a side opposite to the pivoting portion at a distant portion; and a portion retracted by a required length from the end of the other end in the longitudinal direction of the belt main body to the position opposite to the end of the other end. The attachment / detachment means can be constituted by a substantially U-shaped hanging frame body which is pivotably attached to the lever so as to be able to fall down and can be hooked on the retainer of the lever.

The belt body is wound around both flanges of the pipes so that one end and the other end in the longitudinal direction of the belt body are in contact with each other, and a lever at one end and a hook at the other end are engaged. Tilt the frame and the other side toward each other so that they come close to each other, hook the frame with the clasp of the lever, and then turn the lever back to the opposite side of its own pivoting part. The lever is easily tilted with a very small force and the other end is forcibly pulled toward one end in the longitudinal direction of the belt body, and the lever is tilted to a position overlapping the surface of the one end in the longitudinal direction of the belt body. At the end of the process, the reaction force in the separating direction of the other end forcibly drawn to the longitudinal one end of the belt body does not act in the direction to cause the lever, and the lever is moved to the longitudinal end of the belt body. Fell on the surface Is held in state, thereby, so that the other end portion to one longitudinal end portion of the belt body is securely it mounted.

Further, when the lever superposed on the surface of one end in the longitudinal direction of the belt body is forcibly caused, the force for pulling the other end to the one end in the longitudinal direction of the belt body is released, and the belt body is loosened. By removing the retaining frame from the retainer of the lever, the other end of the belt main body can be detached from the other end in the longitudinal direction.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an example of an embodiment of the present invention, and the portions denoted by the same reference numerals as those in FIG. 5 represent the same components.

In the figure, reference numeral 9 denotes a leakage gas sealing belt wound around the flanges 2 and 2 so as to cover between the flanges 2 and 2 abutted at the joint portion between the pipes 1 and 1. The sealing belt 9 has a length about 1 mm shorter than the peripheral length of the flanges 2 and 2 and has a width substantially equal to the total width of the flanges 2 and 2 (twice the width of one flange 2). A belt main body 10, attaching and detaching means 11 capable of pulling the other end to one end in the longitudinal direction of the belt main body 10, attaching and detaching the belt main body 10 appropriately, and protruding from the front side at an appropriate position in the longitudinal direction of the belt main body 10 Nozzle 1 that connects the back side of the belt body 10 to the front side
2 is constituted.

In particular, as shown in FIGS. 2 and 3,
In the present embodiment, the attaching / detaching means 11 is tiltable so that it can be folded back on the end 10x of the one end in the longitudinal direction of the belt body 10 in the direction opposite to the end 10x (in the direction of arrow A in FIG. 3) and overlap the surface of the one end. A lever 14 having a hook-shaped clasp 13 at a position which is pivotally attached to and is away from the pivot portion by a required length toward the anti-pivot portion side, and a terminal end of the other longitudinal end of the belt body 10 A hook which is pivotally attached to a portion retracted by a required length from 10y so as to be able to fall forward beyond the terminal end 10y of the other end and has a substantially U-shape so as to be able to be hooked on the retainer 13 of the lever 14. The stop frame 15 is provided.

As shown in FIG. 3, the belt body 10 is wound around the flanges 2 and 2 of the pipes 1 and 1 and one end and the other end in the longitudinal direction of the belt body 10 are abutted. In this state, the lever 14 at one end and the hook frame 15 at the other end are tilted toward the other party so that they come close to each other, and after the hook frame 15 is hooked on the retainer 13 of the lever 14, When the lever 14 is folded back to the opposite side of its pivot,
According to the principle of leverage, the lever 14 is easily tilted with a relatively small force, and the other end is forcibly drawn toward one end in the longitudinal direction of the belt main body 10. At the stage where the tilting is completed to a position overlapping the surface of the belt portion, the reaction force in the separation direction of the other end portion that is forcibly pulled toward one longitudinal end portion of the belt main body 10 stops acting in the direction that causes the lever 14. The lever 14 is held down on the surface of one end of the belt body 10 in the longitudinal direction.
The other end is securely attached to one end in the longitudinal direction.

If the belt body 10 is wrapped around the flanges 2 and 2 in this manner, if the LNG flows through the pipes 1 and 1 between the flanges 2 and 2, leakage of the LNG may occur. Also, since the LNG vaporized gas is sealed by the belt main body 10, the suction-type small gas detector 8 is appropriately applied to the nozzle 12 provided in the belt main body 10.
(See FIG. 1), the gas detection device 8 is connected via the gas collection tube 7, and the internal gas sealed in the belt main body 10 is suctioned to check whether fluid is leaking. It is possible to do.

In connecting the gas collection tube 7 to the tip of the nozzle 12, as shown in FIG. 4, a male screw portion 12a is formed at the tip of the nozzle 12, and the connection to the tip of the nozzle 12 is made. It is preferable that a connector 7a having a female screw portion (not shown) that can be screwed to the male screw portion 12a be provided at the end of the gas collection tube 7 to be used.

When it becomes necessary to remove the belt body 10 during maintenance and inspection of the pipes 1 and 1,
When the lever 14 superposed on the surface of one end in the longitudinal direction of the belt body 10 is forcibly caused, the force for pulling the other end of the belt body 10 toward the one end in the longitudinal direction is released, and the belt body 1 is released.
0 is loosened, and the hook frame 15 is removed from the retainer 13 of the lever 14, so that the other end of the belt body 10 can be separated from the longitudinal one end.

Therefore, according to the above embodiment, the attaching / detaching means 11
As a result, the work of removing and attaching the belt body 10 can be performed extremely easily, so that the time and labor required for maintenance and inspection work of the pipes 1 and 1 can be reduced, and the burden on the operator can be greatly reduced. Can be reduced.

The leakage gas sealing belt of the present invention is not limited to the above-described embodiment, and the fluid flowing through the pipe is not limited to LNG, and other ranges that do not depart from the gist of the present invention. It is needless to say that various changes can be made within.

[0024]

According to the leaked gas sealing belt of the present invention described above, the work of removing and attaching the belt body can be performed very easily by the attaching / detaching means, so that the time required for the maintenance and inspection work of the piping can be reduced. Therefore, it is possible to achieve an excellent effect that the burden on the worker can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating an example of an embodiment of the present invention.

FIG. 2 is a plan view of the leaked gas sealing belt of FIG. 1;

FIG. 3 is a perspective view showing the details of a means for attaching and detaching the leaked gas sealing belt of FIG. 1;

FIG. 4 is a perspective view showing a connection state between the nozzle of FIG. 1 and a gas sampling tube.

FIG. 5 is a partial sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Flange 9 Leak gas sealing belt 10 Belt body 10x Termination of one end 10y Termination of other end 11 Attaching / detaching means 12 Nozzle 13 Clasp 14 Lever 15 Hanging frame

Claims (2)

[Claims] 1. A leakage gas sealing belt wound around both flanges so as to cover between flanges abutted at a joint portion between pipes, and having a length substantially equal to the circumference of the flanges. A belt main body; attaching and detaching means for pulling the other end to one end in the longitudinal direction of the belt main body and attaching and detaching the belt main body appropriately; and a belt main body protruding from a front side at an appropriate position in the longitudinal direction of the belt main body. And a nozzle for connecting the back side of the gasket to the front side. 2. A belt is pivotally attached to the end of one end in the longitudinal direction of the belt main body so as to be folded back to the opposite end side so as to be overlapped on the surface of the one end, and is opposed to a portion separated by a required length from the joint. A lever provided with a hook-shaped clasp toward the pivot portion, and a portion which is retracted by a required length from the end of the other end in the longitudinal direction of the belt body so as to be able to fall down before the end of the other end. 2. A leak gas seal according to claim 1, wherein said attaching / detaching means is constituted by a substantially U-shaped hooking frame which is pivotally attached to the lever and can be hooked on the retainer of said lever. belt.