JP2526193Y2 - Pipe line breaker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe blocking device for blocking a flow path of a pipe having a branch outlet.

[0002]

2. Description of the Related Art In a gas pipe or the like, it is necessary to carry out various live pipe works without interrupting a gas flow. For example, a branch pipe is taken out with a live pipe. However, there has been no suitable tool in the past, particularly for gas pipes of medium pressure or higher, as means for performing work such as changing the pipe route using live pipes.
That is, it is necessary to change the route from the point A to the point B via the point C to the point D for the reason that a building is to be constructed at the point C. May occur. At this time, it is possible to take out the branch pipe at the point A and the point B while keeping the active pipe and to connect the two via the point D, but it is appropriate to remove the existing pipe passing through the point C. There was no means.

[0003]

However, since the technology for taking out a branch pipe with the live pipe already established has been already established, a pipe line shut-off device for cutting off the flow path of a medium pressure or higher pipe having a branch outlet is provided. By newly developing, the piping route can be easily changed in the live pipe, and the work procedure is as follows. First, a branch outlet is provided at point A and point B, and both branch outlets are connected by a temporary pipe.
At this stage, the gas flow flows through both the existing pipe passing through the point C and the temporary pipe.

[0004] Secondly, at the point A, the downstream side of the existing pipe is cut off by a pipeline blocker, and at the point B, the upstream side of the existing pipe is blocked by a pipe line breaker. At this stage, the gas flow will only flow through the temporary pipes.
The existing piping from Point A through Point C to Point B is changed to pass through Point D. Fourth, the pipeline blockages attached to the points A and B are removed. At this stage, the gas flow will flow through both the new pipe passing through the point D and the temporary pipe. Finally, point A and point B
Attach a blind plate to the branch outlet attached to As a result, the gas flow flows only through the newly installed pipe, and the operation is completed.

[0005] In order to change the pipe route in a live pipe as described above, it is necessary to develop a pipe blockage device for blocking the flow path of a pipe having a branch outlet. Is naturally smaller than the diameter of the pipe itself. A technique is known in which a small-diameter branch outlet is formed in a so-called daruma shape by shifting a plurality of holes in the direction of the pipe axis to form a so-called daruma-type outlet. In this case as well, in this case, the length of the ball-shaped outlet in the pipe axis direction is generally smaller than the diameter of the pipe itself.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pipe blockage device for blocking a flow path of a pipe having a branch outlet whose maximum diameter is smaller than the diameter of the pipe itself. However, the pipe line blocking device provided in this way can be used naturally even when the maximum diameter of the branch outlet is larger than the diameter of the pipe itself.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, that is, a substantially cylindrical main shaft, and a mounting shaft protruding radially at the tip of the main shaft. The end face of the mounting shaft has its center surface fixed in the direction perpendicular to the axis, a substantially disk-shaped folding outer pressure receiving plate whose outer peripheral portion is bent in the mounting axis direction, and on the mounting axis side of the folding shear pressure receiving plate. A fixed annular seal rubber, a wrap wound spring drum fitted to the mounting shaft on the main shaft side of the seal rubber, and housed in the wrap wound spring drum, one end is connected to the seal rubber, and the other end is connected to the wrap wound spring drum. A fixed crown winding spring, a rotating mechanism for rotating the crown winding spring drum, and a lock for locking and releasing the outer circumference of the folded-tatami pressure receiving plate and the seal rubber when the diameter thereof is reduced and reduced. Be composed of a release mechanism is a conduit shutoff characterized by.

[0008]

According to the present invention, the pipeline can be blocked by the use method described below. That is, the main pipe line blocking device is inserted into the pipe from the branch outlet to cut off the pipe line. First, the outer peripheral portion of the folded tatami pressure receiving plate and the outer peripheral portion of the seal rubber are bent, reduced in diameter, and inserted into the pipe from the branch outlet. At this time, the lock release mechanism is locked to maintain the reduced diameter state. Next, the main line blocking device is rotated by 90 °, and the folded pressure receiving plate is further displaced forward.

Next, the lock of the lock release mechanism is released, and the quail-wound spring drum is further rotated using the rotating mechanism in the direction in which the quail-wound spring loosens. With this rotation, the wrap winding spring drum is rotated to loosen the wrap winding spring, and the sealing rubber is pressed against the inner wall of the pipe by the spring force of the wrap winding spring to seal off the pipe. In order to release the blockage, that is, to distribute, the reverse operation may be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The main shaft 3 has a substantially cylindrical shape, and the mounting shaft 4 is fixed by protruding in the radial direction at the distal end. The mounting shaft 4 has a columnar shape, and a substantially disk-shaped pressure receiving plate 5 is fixed to the end of the mounting shaft 4. The pressure receiving plate 5 has a shape in which the center plate surface is fixed to the frontmost surface of the mounting shaft 4. The pressure receiving plate 5 has 16 protrusions 51 formed at equal intervals on the outer peripheral portion as shown in FIG.
Reference numeral 1 denotes a surface extending both plate surfaces of the pressure receiving plate 5 and further has a surface having a constant width 2 in the tangential direction of the pressure receiving plate 51. The protrusion 51 has a through hole penetrating in the width direction. The plate surface of the pressure receiving plate 5 on the side of the mounting shaft 4 is concentric and has a step with a high inner peripheral portion.

The folding stub 6 is fitted to each of the projections 51 on the outer periphery of the pressure receiving plate 5. In other words, there are 16 folding bend plates 6, each of which is fitted to the projection 51. Folded tatami board 6
Has a substantially U-shape, the plate thickness is the same as the outer peripheral portion of the pressure receiving plate 5, and the substantially U-shaped concave portions of the folded and flap plate 6 are fitted into the projections 51, respectively. Then, the folded tatami plate 6 is rotatably fixed to the pressure receiving plate 5 by a pin 7 penetrating through the through hole of the projection 51. The pressure-receiving plate 5 and the folding-type pressure-receiving plate 6 constitute a folding-type pressure-receiving plate.

The seal rubber 8 is a seal material for sealing the pipe 1 and is formed integrally with an annular disk portion 81 and a flange portion 82 formed over the entire outer circumference thereof. A projection having a semicircular cross section is formed at the center of the outer peripheral surface over the entire outer peripheral surface of the flange portion 82. The small diameter portion of the seal rubber 8 is the pressure receiving plate 5
, And the large diameter portion is fixed to the folding tatami plate 6. Among these fixings, first, the small diameter portion of the seal rubber 8 is fixed by fixing the seal rubber holding plate 9 of an annular disk to the pressure receiving plate 5, and the large diameter portion is fixed by the seal rubber mounting plate 1.
0 is fixed to the folding flap 6. Therefore, the inner peripheral surface of the small diameter portion of the seal rubber 8 is fitted with the step of the pressure receiving plate 5.

The seal rubber mounting plate 10 is annular and has an L-shaped cross section. That is, it is composed of an annular disk portion 101 and a flange portion 102 provided on the outer periphery thereof, and is arranged so as to be in contact with the inner peripheral surfaces of the annular disk portion 81 and the flange portion 82 of the seal rubber 8, respectively. The annular disk portion 101 is fixed to the folded and deformed plate 6, and the annular disk portion 81 of the seal rubber 8 is sandwiched between them, so that the flange portion 1 is formed.
02 is a flange 82 of the seal rubber 8 and a direct screw 11
Fixed at. On the other hand, a bevel gear drive shaft 12 is fitted inside the cylinder of the main shaft 1, and the tip of the bevel gear drive shaft 12 protrudes from the main shaft 1. A bevel gear 13 is fixed to the tip of the bevel gear drive shaft 12.

A bevel gear 14 meshing with the bevel gear 13 is rotatably fixed to the mounting shaft 4.
Between the spring rubber drum 1 and the seal rubber holding plate 9
5 is rotatably fitted to the mounting shaft 4. The bevel gear 14 and the crown spring drum 15 are integrated or fixed, and are both rotatable about the mounting shaft 4. The uzu winding spring drum 15 is a thick disk ring shape,
A deep groove in the radial direction is formed on the outer peripheral surface over the entire circumference, and a wrap wound spring 24 is wound and housed in the groove. One end of the wrap wound spring 24 is fixed to the bottom of the groove of the wrap wound spring drum 16, and the other end is the seal rubber mounting plate 1.
0 is fixed to the lower surface of the flange portion 102, that is, to the inner peripheral surface. The bevel gear 14 is composed of a gear body 141 and a sleeve part 142, and the sleeve part 142 is located on the side-wound spring drum 15 side.

A ring-shaped wire attachment ring member 16 is rotatably fitted and fixed to the outer peripheral surface of the sleeve portion 142 of the bevel gear 14. The wire 17 is fixed to the wire attachment ring member 16 in a direction that divides the circumference into 16 equal parts from the center on the main shaft 1 side surface portion. The wire 17 extends in the radial direction of the wire attachment ring member 16, and the extended end is fixed to a small screw 11 to which the seal rubber 8 and the seal rubber attachment plate 10 are fixed. That is, wire 1
7 has one end fixed to the small screw 11 (more precisely, the small screw 11
Among them, the small screw 11) on the right side in FIG. 3 provided on the flange portion 102 of the seal rubber mounting plate 10 is fixed to the wire mounting ring member 16, and there are a total of 16 screws.

A wire guide plate 18 is fitted and mounted on the outer winding spring drum 15 side on the outer peripheral surface of the wire mounting ring member 16. The wire guide plate 18 has a substantially disk-ring-shaped flange portion 181 whose outer peripheral surface is extended toward the main shaft 1, and the flange portion 181 has a through hole or a through groove penetrating in the thickness direction. Is formed. The wire 17 penetrates this through hole or through groove. Further, since the wire guide plate 18 does not rotate, the wire guide plate 18 and the main shaft 1 are connected and fixed by the rotation stop shaft 19.

On the other hand, as shown in FIG. 4, the wire mounting member 16 and the two operation shafts 20A and 20B are connected by wires 21A and 21B. For this reason, as shown in FIG.
The connecting portion 22A and the connecting portion 22B are provided at two locations on the side surface so as to be diametrical to each other, and this one connecting portion 22A and one operating shaft 20A are connected by a wire 21A, and the remaining The remaining one operation shaft 20B as well as one connection part 22A is connected by a wire 21B. Operation axis 2
0A and the operation shaft 20B are attached so as to be able to slide in the axial direction in parallel with the main shaft 1. Therefore, the operation shaft guide 23A and the operation shaft guide 23B are fixed to the main shaft 1.

The conduit blocker of the present embodiment is constructed as described above, and a method of using the conduit blocker will now be described. First, the branch outlet 2 is opened in the pipe 1. This operation is performed under a live pipe, and the periphery of the branch outlet 2 is covered with a branch outlet punch (not shown) having a sealing property. Next, a shutter (not shown) provided in the drilling machine is closed, and a drilling tool (not shown) in the drilling machine is removed and replaced with a main line block device.

Next, a description will be given of the replacement of the pipe blocking device, the insertion into the pipe 1, and the blocking of the pipe. First, as shown in FIG. 2, the operator manually folds the folded tatami plate 6, and at the same time, the outer peripheral portion of the seal rubber 8 is bent inward, and at the same time, the wrap winding spring 24 is wound around the wrap winding drum 15. , To be stored. At this time, as shown in the lower half of FIG. 4, the diameter of the conduit blockage is reduced, and in order to maintain this state, the operation shaft 20A is pulled in the direction of the arrow. However, FIG. 4 shows a state in which the operation shaft 20B is pulled in the direction of the double arrow, and at this time, the pipe line blocking device is in an extended state, that is, a state shown in the upper half.

If the operating shaft 20A is pulled and locked in the direction of the arrow, this state can be maintained even if the operator releases the folded bead plate 6. This is because the seal rubber 8 and the seal rubber mounting plate 10 are pulled toward the center by the wire 17. Secondly, the pipe blocking device is inserted into the pipe 1 from the branch outlet as shown in FIG. 1, FIG. 2 and FIG. Third, as shown in (2) of FIG. 5, by rotating the main shaft 1, the main pipe blocking device is rotated 90 ° counterclockwise, and the center of the main shaft 1 is positioned at the center line of the pipe 1. I slip. Fourth, as shown in (3) of FIG. 5, the main block 1 is moved parallel to the direction in which the pressure receiving plate 2 moves forward until the main shaft 1 hits the periphery of the branch outlet 2.

Fifth, FIG. 5D, FIG. 3 and FIG.
As shown in the upper half, when the lock of the operation shaft 20A is released and the operation shaft 20B is pulled, the outer peripheral portion of the seal rubber 8 is forcibly bent and reduced in diameter, and the folded flexible plate 6 is folded. As a result, the outer peripheral portion of the seal rubber 8 is about to return to its original position, and the folded tatami plate 6 is not bent with respect to the pressure receiving plate 3 but is straightened. At the same time, the crown winding drive drum 12 rotates the bevel gear drive shaft 12 to rotate the crown winding spring 24 in the loosening direction.

Fifth, finally, the bevel gear drive shaft 12 is rotated in a direction to further loosen the crown winding spring 24,
The flange 82 of the seal rubber 8 is pressed against the inner peripheral wall of the pipe 1 by the spring force of the wrap winding spring 24 to seal and shut off the pipe 1. As described above, the pipe line blocking device of the present embodiment can block the flow path of the pipe 1 even when the branch outlet 2 smaller than the diameter of the pipe 1 is opened. In order to restore the cutoff flow path of the pipe 1 and release the cutoff, an operation reverse to the above-mentioned usage method may be performed.

[0023]

According to the present invention, even when the maximum diameter of the branch outlet is smaller than the diameter of the pipe, the flow path of the pipe can be blocked by using the branch outlet even if the maximum diameter of the branch outlet is smaller than the diameter of the pipe.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a plan sectional view of the embodiment.

FIG. 3 is a plan sectional view of the embodiment.

FIG. 4 is a front sectional view of the embodiment.

FIG. 5 is a diagram showing a method of using the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Branch take-out port 3 Main shaft 4 Mounting shaft 5 Pressure receiving plate 6 Folding tatami plate 8 Seal rubber 10 Seal rubber mounting plate 11 Small screw 13, 14 Bevel gear 15 Wound spring drum 24 Wound spring 17, 21

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Mizutani 2nd Daifuku Kuwana-shi, Mie Hitachi Metals Co., Ltd. Kuwana Plant (72) Inventor Kennori Hirashiki 3-29 Kitahama, Chuo-ku, Osaka City, Osaka Hitachi Inside Kansai Branch of Metal Co., Ltd.

Claims (1)

(57) [Scope of request for utility model registration] 1. A substantially disc-shaped main shaft having a substantially cylindrical shape, a mounting shaft protruding in a radial direction at a tip end of the main shaft, and a center surface fixed in a direction perpendicular to the axis at an end of the mounting shaft. A folded tatami pressure receiving plate whose outer peripheral portion is bent in the mounting axis direction,
An annular seal rubber fixed to the mounting shaft side of the folded-tatami pressure receiving plate, a quail-wound spring drum fitted to the mounting shaft on the main shaft side of the seal rubber, and housed in the quail-wound spring drum; A quail-wound spring connected to the other end and fixed to the quail-wound spring drum,
A pipeline block comprising: a rotation mechanism for rotating the wrap-around spring drum; and a lock release mechanism for locking and releasing the bent outer pressure receiving plate and the seal rubber when the outer peripheral portion is bent and reduced in diameter. Utensils.