JP2020193702A - Closing device for duct line - Google Patents

Abstract

To provide a closing device for a duct line which can close a duct line properly even if an opening end part of the duct line inclines relative to a duct line axis.SOLUTION: A closing device for a duct line closes a duct line and includes: a closing member; a pressing member; a flexible ring disposed between the closing member and the pressing member; a hollow body part; a shaft member which is inserted into the body part and moves the closing member in a direction of the pressing member; and an alignment mechanism which causes a slide member to protrude in a direction perpendicular to an axis direction of the shaft member by movement of the shaft member and contact with an inner surface of the duct line to align the shaft member.SELECTED DRAWING: Figure 2

Description

The present invention relates to a pipeline closing device that closes a pipeline to stop the flow of water or the like.

Conventionally, the pipeline may be closed to stop the flow of water or the like. In this case, the pipeline may be temporarily closed with a closing plug. For example, as a prior art for this type of closing plug, a U-shaped packing material is sandwiched between a pressing plate and a receiving plate, and the intermediate portion of the packing material is bulged in the circumferential direction by the pressing action of the pressing plate. Some of them are sealed by contacting the inner surface of the above (see, for example, Patent Documents 1 and 2).

An example of closing a pipeline is a ship bottom inspection. Hereinafter, the bottom inspection of a ship will be described as an example. There are two types of ship bottom inspection: regular inspections that are conducted every five years and intermediate inspections that are conducted during that period. Periodic inspections are generally performed by putting the hull in a dry dock (dry dock), but putting the hull in a dry dock is expensive and time consuming. For this reason, intermediate inspections may be conducted at sea. In this intermediate inspection, the valve that opens and closes the pipeline provided on the bottom of the ship (the "bottom of the ship" in this specification and the documents of the claims) is inspected or replaced. In some cases, it is necessary to close the pipeline outside the valve to prevent the ingress of water.

Japanese Unexamined Patent Publication No. 5-196191 Japanese Unexamined Patent Publication No. 2011-75007

However, in the case of the above-mentioned ship bottom, since it is usually curved from the ship side toward the center of the hull, the opening end of the pipeline is in a state of being inclined with respect to the pipeline axis. Therefore, it is not possible to use a pipeline at the bottom of the ship that closes the open end of the pipeline as in Patent Documents 1 and 2.

For this reason, when performing the above-mentioned intermediate inspection at sea, it is necessary to prepare a closing plug according to the pipeline on the bottom of the ship. Moreover, when the bending angle (tilt angle) changes depending on the location of the pipeline, such as the bottom of a ship, the same closure plug cannot be used in all locations, so there are many types depending on the location of the pipeline. A closure plug is required. Moreover, in order to close a pipeline at sea, it is necessary to perform complicated and labor-intensive underwater work to close the pipeline by using many types of closing plugs properly. Such a problem occurs when the opening end of the pipeline is inclined with respect to the axis of the pipeline in an offshore wind power generation facility as well as the pipeline at the bottom of the ship.

Therefore, an object of the present invention is to provide a pipeline closing device capable of appropriately closing a pipeline even when the opening end of the pipeline is inclined with respect to the axis of the pipeline.

In order to achieve the above object, the present invention is a pipeline closing device for closing a pipeline, which can be interposed between a closing member, a holding member, and the closing member and the holding member. A flexible ring, a hollow main body, a shaft member that is inserted through the main body and moves the closing member in the direction of the holding member, and a shaft member that is orthogonal to the axial direction of the shaft member due to the movement of the shaft member. It is provided with a centering mechanism for aligning the shaft member by projecting the slide member in the direction in which the slide member is brought into contact with the inner surface of the pipeline.

With this configuration, the closing member is moved in the direction of the pressing member by the shaft member, so that the slide member of the centering mechanism is projected and brought into contact with the inner surface of the pipeline. As a result, the shaft member is aligned. Further, by moving the shaft member in the axial direction, the closing member is moved in the direction of the pressing member, and by compressing the flexible ring in the axial direction, the diameter of the central portion of the flexible ring is expanded to increase the diameter of the pipeline. It is brought into contact with the inner peripheral surface. This allows the flexible ring to close the conduit.

Further, the main body is provided with a stopper member on the outer surface that limits the axial movement of the main body, and at least a pair of the stopper members is provided at a position facing the axial center of the main body. May be good.

With this configuration, the flexible ring and the centering mechanism can be inserted into the pipeline, and the stopper member can be brought into contact with the open end of the pipeline to arrange the flexible ring at an appropriate position. Moreover, since the centering position can be centered by the centering mechanism, the position can be appropriately held as long as at least a pair of stopper members are provided at positions facing the axis.

Further, the centering mechanism has a push member for projecting the slide member by axial movement of the shaft member, and a plurality of the slide members projected by the push member, and the plurality of slides. The member has a predetermined width dimension in the axial direction of the shaft member, and may be provided radially around the shaft member.

With this configuration, even if a part of the plurality of slide members projected by the push member first abuts on the inner surface of the pipeline, the other slide members are projected along the inclined surface of the push member. The axial position can be adjusted appropriately. Moreover, since the slide member has a predetermined width dimension in the axial direction of the shaft member, the axial center of the shaft member can be prevented from tilting with respect to the axial center of the pipeline. "The axis of the shaft member does not tilt with respect to the axis of the pipeline" includes an inclination that does not affect the closure of the pipeline by the flexible ring.

Further, the slide member and the push member may be made of a resin material.

With this configuration, the frictional resistance of the contact surface between the slide member and the push member can be reduced. Therefore, after the slide member is expanded by the pushing member to align the shaft member with the axial center position, the diameter of the flexible ring can be expanded to close the pipeline.

Further, a handle for moving the shaft member in the axial direction is provided with respect to the main body portion, and by rotating the handle, the slide member is projected by the push member, and the closing member is moved in the direction of the presser member. It may be configured to move to and increase the diameter of the flexible ring.

With this configuration, when the operator holds the handle and rotates the shaft member, the slide member protrudes and the shaft member is aligned, and the flexible ring is expanded in diameter to close the pipeline. Therefore, the pipeline can be closed efficiently by hand.

According to the present invention, it is possible to appropriately close the pipeline even when the open end of the pipeline is inclined with respect to the axis of the pipeline.

FIG. 1 is a perspective view showing a first pipeline closing device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the first pipeline closing device shown in FIG. 3A and 3B are drawings of the push block shown in FIG. 2, where FIG. 3A is a front view and FIG. 3B is a side view. 4A and 4B are drawings showing one of the slide blocks shown in FIG. 2, where FIG. 4A is a front view and FIG. 4B is a sectional view. FIG. 5 is a drawing of the slide block shown in FIG. 2 before protrusion. FIG. 6 is a drawing of the slide block shown in FIG. 5 after protrusion. FIG. 7 is an operation diagram of pipeline closing by the first pipeline closing device shown in FIG. FIG. 8 is an operation diagram of pipeline closing following FIG. 7. 9A and 9B are drawings of an example showing a usage state of the first pipeline closing device shown in FIG. 1, where FIG. 9A is a cross-sectional view and FIG. 9B is an arrow view of IX. FIG. 10 is a cross-sectional view showing only the front portion of the second pipeline closing device according to the second embodiment of the present invention. FIG. 11 is a cross-sectional view showing only the front portion of the third pipeline closing device according to the third embodiment of the present invention. FIG. 12 is a cross-sectional view showing only the front portion of the fourth pipeline closing device according to the fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments show an example, and various modifications can be made without impairing the gist of the present invention, and the present invention is not limited to the following embodiments. It should be noted that the front-back direction in this specification and the documents of the claims shall be consistent with the concept of the front-back direction shown in FIG.

(Structure of closing device for the first pipeline)
FIG. 1 is a perspective view showing the first pipeline closing device 1 according to the first embodiment, and FIG. 2 is a cross-sectional view of the first pipeline closing device 1 shown in FIG.

The first pipeline closing device 1 has a closing plate 12 (closing member), a holding plate 13 (pressing member), a closing plate 12, and a pressing plate 13 as a closing mechanism 10 for closing the pipeline 100 (FIG. 8). It is provided with a rubber ring 11 (flexible ring) interposed between the and. Further, a hollow main body portion 14 and a shaft member 15 that is inserted through the main body portion 14 and moves the closing plate 12 in the direction of the pressing plate 13 are provided. Further, by moving the shaft member 15 in the axial direction, a plurality of slide blocks 22 (slide members) are projected in a direction orthogonal to the axial direction of the shaft member 15 and brought into contact with the inner surface of the pipeline 100 (FIG. 8). Therefore, a centering mechanism 20 for centering the shaft member 15 is provided. The closing plate 12 and the holding plate 13 can be made of a metal such as stainless steel. In this embodiment, the closing mechanism 10 is provided in the front and the centering mechanism 20 is provided in the rear.

The closing mechanism 10 expands the diameter of the intermediate portion of the rubber ring 11 by pressing the rubber ring 11 in the axial direction with the disc-shaped closing plate 12 and the disc-shaped pressing plate 13. In this embodiment, the shaft member 15 is inserted through the through hole 13a of the pressing plate 13 and the central portion of the rubber ring 11 and fixed to the central portion of the closing plate 12. By moving the shaft member 15 so that the closing plate 12 moves in the direction of the pressing plate 13, the rubber ring 11 is pressed axially with the pressing plate 13 to expand the diameter of the central portion. By bringing the expanded rubber ring 11 into contact with the inner peripheral surface of the pipeline 100, the conduit 100 can be closed by the disc-shaped closing plate 12, the holding plate 13, and the rubber ring 11. As the rubber ring 11, a flexible ring made of a flexible material other than rubber can be used.

The main body 14 is formed of a hollow cylinder, and a hollow metal pipe such as stainless steel can be used. A flange portion 14a for supporting a push block 21 (push member) that projects the slide block 22 in the radial direction is provided at the front end portion (direction of the rubber ring 11) of the main body portion 14. The main body 14 is provided with a stopper member 17 on the outer surface that limits the axial movement of the main body 14 when the pipeline 100 is closed. A pair of stopper members 17 are provided at positions facing the axial center of the main body 14. The main body portion 14 has a length such that a predetermined length is inserted from the open end portion 101 (FIG. 9) of the pipeline 100. The length of the main body 14 to be inserted into the pipeline 100 can be determined by the position of the stopper member 17. In this embodiment, the stopper member 17 is provided at a position where a length of about 60% of the total length of the first pipeline closing device 1 is inserted into the pipeline 100. The position of the stopper member 17 can be determined according to the place of use and the like.

According to the first pipeline closing device 1, as will be described later, the shaft member 15 can be arranged at the center of the pipeline 100 by the centering mechanism 20. That is, the closing mechanism 10 and the centering mechanism 20 are connected to the pipeline 100 in a state where the device axis C1 of the first pipeline closing device 1 is slightly tilted with respect to the pipeline axis C2 (FIG. 9) of the pipeline 100. Even if it is inserted, the shaft member 15 can be arranged at the center of the pipeline 100 by the centering mechanism 20. Therefore, even when the opening end portion 101 of the pipeline 100 is inclined with respect to the pipeline axis C2, the position of the first pipeline closing device 1 can be appropriately held by the pair of stopper members 17.

The shaft member 15 can be made of a metal such as stainless steel, and a screw portion 15a is provided at a rear position in the direction opposite to the closing plate 12. The shaft member 15 of this example is provided with a threaded portion 15a over its entire length. The shaft member 15 is inserted into the hollow portion of the main body portion 14, and the handle 16 is provided at the portion of the screw portion 15a. The handle 16 can be made of a metal such as stainless steel, and the screw portion 16b formed in the central boss portion 16a is screwed into the screw portion 15a of the shaft member 15. In the handle 16, the boss portion 16a is in contact with the rear end portion of the main body portion 14. Therefore, by rotating the handle 16, the shaft member 15 in which the screw portion 15a is screwed into the screw portion 16b is moved in the axial direction. The rotation of the handle 16 is possible manually.

The centering mechanism 20 includes a push block 21 in which a central through hole 21b is inserted through the shaft member 15 and is movable in the axial direction, and a plurality of slide blocks 22 pushed toward the push block 21 by the presser plate 13. have. The push block 21 and the slide block 22 of this embodiment are made of a resin material or the like, and the contact frictional resistance is reduced by the material. The slide block 22 has a predetermined width dimension of dimension W in the direction of the device axis C. As shown in FIG. 7, which will be described later, the dimension W is appropriate so that the device axis C1 does not tilt with respect to the line axis C2 when the slide block 22 is brought into contact with the inner surface of the line 100. Set to width dimension. Both the push block 21 and the slide block 22 can be made of a metal material. The push block 21 is formed in a hexagonal shape as described below. The slide block 22 is composed of six slide blocks 22 that are in contact with each hexagonal surface of the push block 21, and each slide block 22 is formed in the same shape. The push block 21 and the slide block 22 are in contact with each other at the tapered surface 21a inclined toward the device axis C1 at the front and the tapered surface 22a inclined toward the device axis C1 at the rear. Therefore, the tapered surface 22a of the slide block 22 moves in the axial direction along the tapered surface 21a of the push block 21, so that each slide block 22 is projected in the radial direction.

Each slide block 22 is guided by a guide member 24 (for example, a pin) provided so that a guide groove 23 provided therein protrudes in the axial direction from the holding plate 13, and can move in the radial direction but in the circumferential direction. Movement is restricted. A presser ring 25 (for example, a rubber ring) is hung on the outer circumference of the six slide blocks 22 as described later. The presser ring 25 urges each slide block 22 toward the shaft member 15. The shape of the push block 21 and the number of slide blocks 22 are not limited to this embodiment. For example, if the push block 21 has a pentagonal shape, the slide block 22 can be composed of five slide blocks 22 in contact with each surface thereof. Further, the materials of the push block 21 and the slide block 22 are not limited to this embodiment. The presser ring 25 may have a configuration other than the rubber ring, and may be configured to expand and contract according to the radial movement of the slide block 22.

(Structure of centering mechanism)
3A and 3B are drawings of the push block 21 shown in FIG. 2, where FIG. 3A is a front view and FIG. 3B is a side view. 4A and 4B are drawings showing one of the slide blocks 22 shown in FIG. 2, where FIG. 4A is a front view and FIG. 4B is a sectional view.

As shown in FIG. 3, the push block 21 is formed in a hexagonal pyramid shape having a regular hexagonal front view, and has no top. A through hole 21b through which the shaft member 15 is inserted is provided at the center position. Each of the six surfaces is formed on a tapered surface 21a that is inclined at a predetermined angle in the axial direction of the through hole 21b.

As shown in FIG. 4, the slide block 22 is composed of six slide blocks 22 that slide along each tapered surface 21a of the push block 21, and FIG. 4 shows one slide block 22. The slide block 22 is formed in a substantially fan shape when viewed from the front, and is provided with a long hole guide groove 23 extending in the radial direction in the central portion. In the slide block 22, a guide member 24 projecting axially from the pressing plate 13 is inserted into the guide groove 23 (FIG. 2). As a result, the slide block 22 can move in the radial direction within the range of the guide groove 23. The contact surface of the slide block 22 with the push block 21 is formed on the tapered surface 22a at the same angle as the tapered surface 21a of the push block 21. A concave groove 22b on which the holding ring 25 is hung is provided on the outer peripheral portion of the slide block 22.

(Operation of the centering mechanism of the closing device for the first pipeline)
FIG. 5 is a drawing of the slide block 22 shown in FIG. 2 before protrusion. FIG. 6 is a drawing of the slide block 22 shown in FIG. 5 after protrusion.

As shown in FIG. 5, the slide block 22 is not subjected to the force of moving in the radial direction by the push block 21 in the state of being inserted into the pipeline 100. Therefore, the six slide blocks 22 are kept urged in the direction of the shaft member 15 by the pressing ring 25 (FIG. 2) provided on the outer peripheral portion.

As shown in FIG. 6, in the state where the slide block 22 is projected toward the inner surface of the pipeline 100, the tapered surface 22a moves along the tapered surface 21a of the push block 21, and the holding ring provided on the outer peripheral portion thereof. It is projected in the radial direction against the force of 25. Since the slide block 22 is projected radially with respect to the shaft member 15 in the central portion, all the slide blocks 22 are pressed against the inner surface of the pipeline 100 to be aligned as described later.

(Closing of the pipeline by the closing device for the first pipeline)
FIG. 7 is an operation diagram of pipeline closing by the first pipeline closing device 1, and FIG. 8 is an operation diagram of pipeline closing following FIG. 7.

As shown in FIG. 7, in the first pipeline closing device 1, the closing mechanism 10 and the centering mechanism 20 are configured to have a size suitable for the nominal diameter D (for example, 50A to 250A) of the pipeline 100. .. The first pipeline closing device 1 rotates the handle 16 in the tightening direction with the parts of the closing mechanism 10 and the centering mechanism 20 inserted at predetermined positions of the pipeline 100. As a result, the shaft member 15 is moved rearward, and the closing plate 12 is moved rearward. The rotation work of the handle 16 can be performed manually. Then, the rubber ring 11, the pressing plate 13, and the slide block 22 are moved in the rear direction, and the tapered surface 22a of the slide block 22 is moved along the tapered surface 21a of the pressing block 21. In this example, since the slide block 22 and the push block 21 are made of a resin material, the contact frictional resistance of the tapered surfaces 22a and 21a is small, and the slide block 22 pushes the block before the central portion of the rubber ring 11 expands in diameter. The slide block 22 is projected in the radial direction by being moved axially along the 21. The plurality of protruding slide blocks 22 are brought into contact with the inner surface of the pipeline 100. Even if some of the slide blocks 22 first come into contact with the pipeline 100, all the slide blocks 22 are pressed by the push block 21 and all the slide blocks 22 come into contact with the inner surface of the pipeline 100. Can exert cardiac function. Further, since the slide block 22 has an appropriate width dimension W in the direction of the device axis C, even if the water pressure P acts from the handle 16 side, the slide block 22 is placed on the inner surface of the pipeline 100. It is possible to prevent the device axis C1 from tilting with respect to the pipeline axis C2 in a state of being in contact with the pipe. Due to the centering function of the slide block 22, the shaft member 15 is arranged at the pipeline axis C2. As a result, even if the shaft member 15 is eccentric with respect to the axial center of the pipeline 100 in a state where the front portion of the first pipeline closing device 1 is inserted into the pipeline 100, the shaft member 15 can be adjusted by the centering function. Is arranged at the pipeline axis C2. Since the shaft member 15 is arranged at the pipeline axis C2, the rubber ring 11 is also arranged at the pipeline axis C2. In this state, the pressing ring 25 provided on the outer periphery of the slide block 22 is in an extended state.

As shown in FIG. 8, in this example, after the plurality of slide blocks 22 abut on the inner surface of the pipeline 100, the handle 16 is further rotated, so that the closing plate 12 moves rearward and the rubber ring 11 The diameter of the central part is expanded. Since the shaft member 15 is arranged at the axial center C2 of the pipeline, the expanded rubber ring 11 appropriately contacts the inner peripheral surface of the pipeline 100, and the pipeline 100 is closed. According to the first pipeline closing device 1, it has been confirmed that the pipeline 100 can be kept closed for a predetermined time in a test in which 0.15 MPa is applied as a test water pressure P from the handle 16 side. In this example, an example has been described in which the slide block 22 is projected first and brought into contact with the inner surface of the pipeline 100 to align the rubber ring 11, and then the central portion of the rubber ring 11 is expanded to close the conduit 100. , The operation order may be reversed so that the central portion of the rubber ring 11 is enlarged first.

(Explanation of usage status of pipeline closure by the first pipeline closure device)
9A and 9B are drawings of an example showing a usage state of the first pipeline closing device 1, in which FIG. 9A is a cross-sectional view and FIG. 9B is an arrow view of IX. This example is an example of closing the pipeline 100 provided on the bottom 110 of the ship. As shown in FIG. 9A, the side surface of the bottom 110 is curved from above to below. On the other hand, the side surface of the bottom 110 is formed in a straight line from the bow to the stern, or in a straight line including a curved surface close to a straight line (direction orthogonal to the paper surface). In this example, a pipeline 100 is provided at the horizontal conduit axis C2 with respect to such a ship bottom 110.

When such a pipeline 100 is closed by the first pipeline closing device 1, first, the inner surface of the pipeline 100 at a portion where the rubber ring 11 of the closing mechanism 10 and the slide block 22 of the centering mechanism 20 are in contact with each other is cleaned. After that, the front portion including the closing mechanism 10 and the centering mechanism 20 is inserted into the pipeline 100, and the stopper member 17 provided on the main body 14 is brought into contact with the open end 101 (ship bottom 110) of the pipeline 100. Let me. As shown in FIG. 9B, the stopper member 17 is brought into contact with the opening end 101 (bottom 110) in a horizontal state so as to face the bow and stern of the bottom 110. When the pipeline 100 other than the bottom 110 is closed, the stopper member 17 is made vertical when the horizontal direction is curved and the vertical direction is straight like a cylindrical outer surface, and the pipeline 100 It may be brought into contact with the opening end portion 101. According to the first pipeline closing device 1, since the centering mechanism 20 can align the shaft member 15 as described above, at least a pair of stopper members 17 are provided at positions facing the shaft member 15. If so, the position can be held properly. As described above, according to the first pipeline closing device 1, the closing mechanism 10 and the centering mechanism 20 are brought into contact with the opening end portion 101 of the pipeline 100 by bringing the pair of stopper members 17 into contact with the pipeline 100. Can be placed in the appropriate position.

Further, according to the first pipeline closing device 1, since positioning is performed at a linear portion of the bottom 110 from the bow to the stern by a pair of stopper members 17, the pipeline 100 at a place where the curvature of the bottom 110 changes. However, it can be positioned in the same way. That is, it can be used even when the inclination angle of the opening end 101 of the pipeline 100 is different. Therefore, it can be efficiently arranged even in underwater work.

After arranging the first pipeline closing device 1, the handle 16 is rotated to align the slide block 22 of the centering mechanism 20 in the radial direction as shown in FIG. 7 above. be able to. By aligning the first pipeline closing device 1 with the centering mechanism 20, the center of the rubber ring 11 of the closing mechanism 10 is arranged at the pipeline axis C2. After that, as shown in FIG. 8 described above, the pipeline 100 can be closed by increasing the diameter of the rubber ring 11 of the closing mechanism 10. Moreover, since the first pipeline closing device 1 is positioned on the bottom 110 of the ship by the stopper member 17, the work of rotating the handle 16 in water can be efficiently performed. In addition, one first pipeline closing device 1 can close the pipeline 100 at the portion where the curvature rate of the bottom 110 changes, and in this respect as well, the work can be performed efficiently. Further, the number of the first pipeline closing devices 1 prepared for the bottom inspection of the ship can be reduced, and the cost can be reduced.

As described above, according to the first pipeline closing device 1, the handle 16 is rotated to align the portion of the rubber ring 11 and to stop the water by closing the pipeline 100 by the rubber ring 11. This makes it possible to obtain an appropriate water stoppage without considering that the rubber ring 11 is eccentric when the first pipeline closing device 1 is arranged. Moreover, it is possible to improve workability and reduce costs.

(Structure of closing device for second pipeline)
FIG. 10 is a cross-sectional view showing only the front portion of the second pipeline closing device 2 according to the second embodiment. Since the second pipeline closing device 2 is an example in which the arrangement of the front portion of the first pipeline closing device 1 is different, only the configuration of the front portion will be described and the description of the rear configuration will be omitted. The configuration of the second pipeline closing device 2 and the same configuration as the first pipeline closing device 1 will be described with the same reference numerals.

The closing device 2 for the second pipeline is provided with a closing mechanism 10 in the front and a centering mechanism 20 in the rear. The arrangement of the configuration of the alignment mechanism 20 of the second pipeline closing device 2 is different from that of the first pipeline closing device 1. The arrangement of each configuration is different, but the functions are the same.

The centering mechanism 20 of the second pipeline closing device 2 is provided with a slide block 22 in front of a flange portion 14a provided at the front end of the main body portion 14, and a push block 21 is provided in front of the flange portion 14a. The push block 21 is provided so that the tapered surface 21a is inclined rearward toward the device axis C1, and the slide block 22 is provided so that the tapered surface 22a moves along the tapered surface 21a. The flange portion 14a of the main body portion 14 is provided with a guide member 24 so as to project forward in the axial direction. The guide member 24 is inserted through the guide groove 23 of the slide block 22, and the slide block 22 can move in the radial direction but is restricted in the circumferential direction.

In the closing mechanism 10, a closing plate 12 is fixed to the tip of the shaft member 15, and a rubber ring 11 and a holding plate 13 are provided behind the closing plate 12. The slide block 22 is provided behind the presser plate 13.

According to such a second pipeline closing device 2, by rotating the handle 16 (FIG. 9) in the tightening direction, the shaft member 15 is moved rearward and the closing plate 12 is moved rearward. As a result, the rubber ring 11, the pressing plate 13, and the pushing block 21 are moved rearward, the pushing block 21 is pushed into the central portion of the slide block 22, and the slide block 22 is projected in the radial direction. Even if some of the slide blocks 22 first come into contact with the inner surface of the pipeline 100, the push block 21 brings all the slide blocks 22 into contact with the inner surface of the pipeline 100 and aligns them.

After the plurality of slide blocks 22 come into contact with the inner surface of the pipeline 100, the handle 16 is further rotated to move the closing plate 12 rearward and expand the diameter of the central portion of the rubber ring 11. As a result, the rubber ring 11 comes into contact with the inner peripheral surface of the pipeline 100, and the pipeline 100 (FIG. 8) is closed.

Since the function of each configuration in the second pipeline closing device 2 is the same as that of the first pipeline closing device 1, other detailed description will be omitted.

(Structure of closing device for third pipeline)
FIG. 11 is a cross-sectional view showing only the front portion of the third pipeline closing device 3 according to the third embodiment. Since the third pipeline closing device 3 is an example in which the arrangement of the front portion configuration in the first pipeline closing device 1 is different, only the front configuration is described and the description of the rear configuration is omitted. The configuration of the third pipeline closing device 3 and the same configuration as the first pipeline closing device 1 will be described with the same reference numerals.

The third pipeline closing device 3 is provided with a centering mechanism 20 at the front and a closing mechanism 10 at the rear thereof. In the third pipeline closing device 3, the centering mechanism 20 and the closing mechanism 10 in the second pipeline closing device 2 are arranged in reverse. The arrangement of each configuration is different, but the functions are the same.

In the third pipeline closing device 3, the flange portion 15b is fixed to the front end portion of the shaft member 15, and the guide member 24 is provided so as to project rearward in the axial direction from the flange portion 15b. A plurality of slide blocks 22 are provided behind the flange portion 15b so as to move in the radial direction along the guide member 24.

On the other hand, a closing plate 12 is provided at the front end of the main body 14, and a rubber ring 11 and a pressing plate 13 are provided in front of the closing plate 12. In this example, a water blocking member 18 (for example, an O-ring or the like) is provided between the through hole 13a of the holding plate 13 and the shaft member 15. A push block 21 is provided in front of the presser plate 13 so that the tapered surface 21a is inclined forward toward the device axis C1.

According to such a third pipeline closing device 3, by rotating the handle 16 (FIG. 9) in the tightening direction, the shaft member 15 moves rearward, and the flange portion 15b moves the slide block 22 rearward. Move. As a result, the slide block 22 moves the push block 21 rearward, and in this embodiment, the push block 21 moves the presser plate 13 in the direction of the closing plate 12 to expand the diameter of the central portion of the rubber ring 11. As a result, the rubber ring 11 comes into contact with the inner peripheral surface of the pipeline 100, and the pipeline 100 (FIG. 8) is closed. After that, by further rotating the handle 16, the slide block 22 is moved in the direction of the push block 21, and the slide block 22 is projected in the radial direction along the push block 21. Then, the plurality of slide blocks 22 are brought into contact with the inner surface of the pipeline 100, and the shaft member 15 is aligned.

Since the function of each configuration in the third pipeline closing device 3 is the same as that of the first pipeline closing device 1, detailed description thereof will be omitted.

(Structure of closing device for 4th pipeline)
FIG. 12 is a cross-sectional view showing only the front portion of the fourth pipeline closing device 4 according to the fourth embodiment. Since the fourth pipeline closing device 4 is an example in which the arrangement of the front portion configuration in the first pipeline closing device 1 is different, only the front configuration is described and the description of the rear configuration will be omitted. The configuration of the fourth pipeline closing device 4 and the same configuration as the first pipeline closing device 1 will be described with the same reference numerals.

The fourth pipeline closing device 4 is provided with a centering mechanism 20 at the front and a closing mechanism 10 at the rear thereof. The arrangement of the configuration of the centering mechanism 20 is different from that of the third pipeline closing device 3 in the fourth pipeline closing device 4. The arrangement of each configuration is different, but the functions are the same.

In the fourth pipeline closing device 4, the flange portion 15b is fixed to the front end portion of the shaft member 15, and the push block 21 is provided behind the flange portion 15b. The push block 21 is provided so that the tapered surface 21a is inclined rearward toward the device axis C1.

On the other hand, a closing plate 12 is provided at the front end of the main body 14, and a rubber ring 11 and a pressing plate 13 are provided in front of the closing plate 12. In this example, a water blocking member 18 (for example, an O-ring or the like) is provided between the through hole 13a of the holding plate 13 and the shaft member 15. A guide member 24 is provided in front of the presser plate 13 so as to project forward in the axial direction, and a plurality of slide blocks 22 are provided so as to move in the radial direction along the guide member 24. The push block 21 is provided so that the tapered surface 21a is in contact with the tapered surface 22a of the slide block 22.

According to such a fourth pipeline closing device 4, by rotating the handle 16 (FIG. 9) in the tightening direction, the shaft member 15 moves rearward, and the flange portion 15b pushes the push block 21 rearward. Move it. As a result, the push block 21 moves the slide block 22 rearward, and in this embodiment, the presser plate 13 is moved in the direction of the closing plate 12 by the slide block 22 to expand the diameter of the central portion of the rubber ring 11. As a result, the rubber ring 11 comes into contact with the inner peripheral surface of the pipeline 100, and the pipeline 100 (FIG. 8) is closed. After that, by further rotating the handle 16, the push block 21 is moved in the direction of the slide block 22, and the slide block 22 is projected in the radial direction along the push block 21. Then, the plurality of slide blocks 22 are brought into contact with the inner surface of the pipeline 100, and the shaft member 15 is aligned.

Since the function of each configuration in the fourth pipeline closing device 4 is the same as that of the first pipeline closing device 1, detailed description thereof will be omitted.

The order of centering by the centering mechanism 20 and closing of the pipeline 100 by the rubber ring 11 in the above-described embodiment is an example, and the operation may be reversed in any of the embodiments.

(Other embodiments)
The above-mentioned arrangement example of the closing mechanism 10 and the centering mechanism 20 of the first pipeline closing device 1 to the fourth pipeline closing device 4 is an example, and may be another arrangement.

The above-mentioned first pipeline closing device 1 to fourth pipeline closing device 4 can be used not only when closing the pipeline 100 provided on the bottom 110 of the ship, but also in, for example, a floating offshore wind power generation facility. it can. When the pipeline 100 such as the bottom 110 is closed by the first pipeline closing device 1 to the fourth pipeline closing device 4, the pipeline 100 can be easily closed in water. Moreover, even if the angles of the opening ends 101 of the pipeline 100 are different, the pipeline 100 can be appropriately closed by one of the first pipeline closing devices 1 to the fourth pipeline closing device 4. Therefore, it is possible to reduce the cost at the time of ship bottom inspection. The first pipeline closing device 1 to the fourth pipeline closing device 4 are not limited to the use when closing the pipeline 100 in water.

1 Closing device for the first pipeline
2 Closing device for the second pipeline
3 Closing device for the third pipeline
4 4th pipeline closing device 10 Closing mechanism 11 Rubber ring (flexible ring)
12 Closing plate (closing member)
13 Presser plate (press member)
14 Main body 15 Shaft member 16 Handle 17 Stopper member 20 Alignment mechanism 21 Push block (push member)
22 Slide block (slide member)
23 Guide groove 24 Guide member 25 Presser ring 100 Pipe line 101 Opening end C1 Device axis C2 Pipe line axis

Claims (5)

A pipeline closing device that closes a pipeline.
Closing member and
Presser member and
A flexible ring interposed between the closing member and the pressing member,
Hollow body and
A shaft member that is inserted through the main body and moves the closing member in the direction of the holding member.
It is provided with a centering mechanism for aligning the shaft member by projecting the slide member in a direction orthogonal to the axis direction of the shaft member by moving the shaft member and bringing it into contact with the inner surface of the pipeline. A pipe closure device characterized by this. The main body is provided with a stopper member on the outer surface that limits the axial movement of the main body.
At least a pair of the stopper members are provided at positions facing the axial center of the main body.
The pipeline closing device according to claim 1. The centering mechanism includes a pushing member that projects the slide member by axially moving the shaft member, and a plurality of the sliding members that are projected by the pushing member.
The plurality of the slide members have a predetermined width dimension in the axial direction of the shaft member, and are provided radially around the shaft member.
The pipeline closing device according to claim 1 or 2. The slide member and the push member are made of a resin material.
The pipeline closing device according to claim 3. A handle for moving the shaft member in the axial direction with respect to the main body is provided.
By rotating the handle, the slide member is projected by the push member, and the closing member is moved in the direction of the press member to increase the diameter of the flexible ring.
The pipeline closing device according to claim 3 or 4.

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