JPH11230376A - Gate valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly insert a gate valve into a fluid pipe while facilitating axial positioning of a guide pipe and a through hole by providing a display device for displaying axial displacement of a through hole and a guide pipe from each other in a dividing case and a fluid pipe, and moving or turning the dividing case on the basis of the display device. SOLUTION: A top surface of an upper cover 6 is provided with a pipe axis indication mark 10 for showing the movement of a dividing case 4 in the pipe axial direction and a rotation indication mark 11 for showing the rotation around the pipe axis. On the other hand, a pipe axial reference mark 12 is provided in both sides of the dividing case 4 on the peripheral surface of the fluid pipe 1 at positions at an equal distance from the mark 10 over the upper half-circumference of the pipe. In the case where a large force such as an earthquake is applied to a gate valve device 2 and where the dividing case 4 is moved in the pipe axial direction or rotated around the pipe axis and where the through hole provided in a top surface of the fluid pipe 1 and a guide pipe provided in an upper part of the divided case 4 are axially displaced from each other, a distance between each mark 10, 12 is measured so as to grasp the moving direction and the moving distance of the dividing case 4, and the dividing case 4 is reset at the original position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate valve device for inserting a gate valve into a fluid pipe through a through hole to cut off the flow of fluid, and more particularly, to a fluid pipe having a through hole. On the outer peripheral surface, a divided case body having a guide tube coaxial with the through hole and a gate valve housed in an appropriate place inside the guide tube is mounted, and the gate valve in the guide tube is inserted into the fluid pipe through the through hole. The present invention relates to a gate valve device that inserts to block a flow of a fluid.

[0002]

2. Description of the Related Art As a gate valve device which cuts a flow of a fluid by inserting a through-hole into a fluid pipe and inserting a gate valve into the fluid pipe through the through-hole, for example, Japanese Utility Model Publication No. 63-4859 and Japanese Utility Model Publication No. There is one disclosed in JP-A-63-47337.

[0003] These conventional gate valve devices have a divided case body which has a guide tube coaxial with a through hole provided in a fluid pipe and covers the periphery of the fluid pipe, and a plurality of divided case bodies inside the guide pipe. The valve is inserted into the pipe through the through-hole, and the sealing member is swelled outward by strongly pushing the gate valve. It comes into pressure contact with the peripheral surface to interrupt the flow of fluid.

[0004]

The above-mentioned conventional gate valve device is generally installed in an existing pipe in a water-free state. The installed gate valve device is used by inserting a gate valve housed in a guide pipe into a fluid pipe in order to shut off fluid in an existing pipe at the time of construction such as turning around. After the construction,
The gate valve is again housed in the guide tube and is left in this state.

When a large force acts on the gate valve device in a state in which the gate valve is housed in the guide pipe due to an earthquake or the like, the divided case body relatively moves or rotates in the pipe axis direction of the fluid pipe and penetrates. The axis of the hole and the guide tube may be shifted.

When the fluid in the existing pipe is to be shut off again by using such a gate valve device in which the shaft is shifted, the gate valve is moved from the through hole because the shaft of the through hole and the guide tube are shifted. Since it could not be inserted into the inside of the pipe, the shutoff of fluid using this gate valve device was abandoned.

Further, even when the divided case body is moved to align the through hole with the guide tube, the through hole is hidden inside the divided case body, so that the position cannot be known from the outside. Since it was not possible to measure the direction and amount of misalignment between the hole and the guide tube axis, moving the split case body to a dark cloud and aligning the axes did not work, and the use of the gate valve device had to be stopped. Did not get.

[0008] The problem to be solved by the present invention is to solve the above-mentioned problem. The divided case body moves with respect to the fluid pipe, and the axis of the through-hole and the guide pipe are shifted, so that the gate valve is moved. It is an object of the present invention to provide a gate valve device that can align the axis of the through hole with the axis of the guide tube when it cannot be inserted into the fluid pipe.

[0009]

In order to solve the above-mentioned problems, a gate valve device according to the present invention comprises a guide tube coaxial with the through hole and a guide tube formed on the outer peripheral surface of the fluid tube having the through hole. A partition valve device which is mounted with a split case body having a gate valve housed in an appropriate place inside, and inserts a gate valve in the guide tube into a fluid pipe through a through-hole to shut off a flow of fluid. Further, a display device for expressing the axis deviation between the through hole and the guide tube is provided in each of the divided case and the fluid tube.

[0010] It is preferable that the display device is composed of an indication mark provided on the outer surface of the divided case body and a reference mark provided on the outer peripheral surface of the fluid pipe.

The instruction mark includes a tube axis instruction mark representing movement in the tube axis direction and a rotation instruction mark representing rotation about the tube axis. The reference mark is a reference for movement in the tube axis direction. And a rotation reference mark serving as a reference for rotation about the pipe axis.

The reference marks are preferably provided on the outer peripheral surface of the fluid pipe on both sides of the divided case body mounted on the fluid pipe.

According to the present invention, the divided case body moves in the pipe axis direction with respect to the fluid pipe due to an earthquake or the like, or rotates around the pipe axis, and the guide pipe provided in the divided case body is moved. When the axis of the shaft and the through hole drilled in the fluid pipe are misaligned, a display device that expresses the misalignment of the shaft is provided, so the direction and amount of misalignment of the shaft can be confirmed, and according to the display device By moving or rotating the split case body, the axis of the guide tube and the axis of the through hole can be aligned,
The risk that the gate valve cannot be inserted into the fluid pipe is eliminated.

[0014]

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

FIGS. 1 to 5 show an embodiment of the present invention, in which a gate valve device 2 is attached to a fluid pipe 1 of a water main. A through-hole 3 is formed in the upper surface of the fluid pipe 1, and a pair of upper and lower divided case bodies 4 are mounted on the outer peripheral surface surrounding the through-hole 3 while maintaining watertightness by a packing 5 interposed around the through-hole 3. Have been.

A guide tube 4a is connected to the upper part of the divided case body 4 at a position aligned with the through hole 3 upward. A flange portion 4b is formed at the upper end of the guide tube 4a, and a temporary fixing bolt 4c is screwed down toward the center of the guide tube 4a. Plug lid 7 coaxially attached to guide tube 4a by upper lid 6 bolted to flange 4b
At the upper end of the (guide tube), a spindle 9 for moving up and down the plug body 8 (gate valve) is attached.

A plug body 8 to which a packing is attached is attached to the spindle 9 so as to be able to paddle up and down and not to rotate relatively.

On the upper surface of the upper lid 6, a tube axis indicating mark 10 indicating movement of the divided case body 4 in the tube axis direction and a rotation indicating mark 11 indicating rotation about the tube axis are marked with resin paint.

On both sides of the divided case body 4 on the outer peripheral surface of the fluid pipe 1, a pipe axis reference mark 12 is marked at a position equidistant from the pipe axis indication mark 10 with a resin paint over the upper half circumference of the pipe. The rotation reference mark 13 is marked with a predetermined length in the tube axis direction by a resin paint so as to be on the same line as the rotation instruction mark 11 in plan view and to cross the tube axis reference mark 12.

The pipe axis reference mark 12 may be painted on the outer peripheral surface of the fluid pipe 1 along both side ends of the divided case body 4. In this case, since both end portions of the divided case body 4 serve as the tube axis indicating marks 10, it is not necessary to paint the tube axis indicating marks 10 on the upper surface of the upper lid 6.

Next, how to install the gate valve device 2 will be described.

1) Excavation of a place where the gate valve device 2 of the fluid pipe 1 buried underground is installed to expose the fluid pipe.

2) A packing 5 is provided at a predetermined position of the fluid pipe 1.
Is covered and attached with bolts and nuts.

3) A work valve (not shown) is attached to the flange portion 4b at the upper end of the guide tube 4a, and a cutter device (not shown) is placed on the work valve in a watertight manner.

4) The valve body of the working valve is opened, and a through hole 3 is formed in the fluid pipe 1 by a cylindrical cutter mounted on a cutter device.

5) The cylindrical cutter is housed in the cutter device, the valve body of the working valve is closed, and the cutter device is removed.

6) Plug lid 7 with plug body 8 attached
A work cylinder (not shown) in which is accommodated is attached to a work valve.

7) The valve body of the working valve is opened, the plug lid 7 is joined to the guide pipe 4a, temporarily fixed with the temporary fixing bolt 4c, and the working valve is removed.

8) The upper cover 6 provided with the tube axis indicating mark 10 and the rotation indicating mark 11 is attached to the flange 4b with bolts and nuts.

9) A pipe axis reference mark 12 is painted on the surface of the fluid pipe 1 on both sides of the divided case body 4 at an equal distance from the pipe axis indication mark 10.

10) The rotation reference mark 13 is painted on the surface of the fluid pipe 1 on the same line as the rotation instruction mark 11 in plan view.

11) The gate valve device 2 is backfilled.

The plug valve 8 is inserted into the fluid pipe 1 through the through hole 3 by rotating the spindle 9 in the backfilled sluice valve device 2 to shut off the fluid. After use, the plug 9 is pulled in the guide tube 4a by rotating the spindle 9 in the reverse direction.

When a large force such as an earthquake acts on the gate valve device 2 and the split case body 4 moves in the pipe axis direction and rotates about the pipe axis, the through hole 3 and the guide pipe 4a
When the gate valve device 2 is used again, the plug body 8 cannot be inserted into the fluid pipe 1 through the through hole 3 when the gate valve device 2 is used again.

In such a case, the fluid pipe 1 and the gate valve device 2
Is excavated, and the distance between the pipe axis indicating mark 10 and the pipe axis reference marks 12 on both sides of the divided case body 4 is measured,
Since the moving direction and the moving distance of the divided case body 4 are known, the divided case body 4 can be returned to the original position.

The axis of the through-hole 3 and the axis of the guide tube 4a can be aligned by rotating the divided case body 4 so that the rotation instruction mark 11 and the rotation reference mark 13 coincide.

FIG. 4 shows a tube axis indicating mark 1 for moving in the tube axis direction.
FIG. 4 is an explanatory diagram of a relationship between 0 and a tube axis reference mark 12.

(A) shows a state in which the divided case body 4 is attached to the fluid pipe 1, and the pipe axis reference marks 1 are provided at positions on both sides of the divided case body separated by a distance L 1 from the pipe axis indicating mark 10.
2 are provided.

(B) shows a state in which the divided case body 4 has moved to the left. By measuring the distances L2 and L3 from the tube axis indicating mark 10 to the left and right tube axis reference marks 12, L2 <L3. Is established, it can be confirmed that the divided case body 4 has moved to the left, and the movement distance is (L / 2−L2) or (L3−L / 2).

The axis of the through-hole 3 and the axis of the guide tube 4a can be made to coincide with each other by moving the divided case body 4 at the confirmed moving distance.

(C) shows a state in which the divided case body 4 has largely moved to the left. Since the pipe axis reference mark 12 on the left side cannot be seen, the divided case body 4 has moved to the left. Can be confirmed. The divided case body 4 is moved rightward until the left pipe axis reference mark 12 is seen to be in the state (B), and the distances L2 and L3 from the pipe axis indication mark 10 to the left and right pipe axis reference marks 12 are measured. By doing so, the moving distance of the divided case body 4 can be confirmed.

The axis of the through-hole 3 and the axis of the guide tube 4a can be made to coincide with each other by moving the divided case body 4 at the confirmed moving distance.

FIG. 5 is an explanatory diagram of the relationship between the rotation instruction mark 11 and the rotation reference mark 13.

(A) shows a state in which the divided case body 4 is attached to the fluid pipe 1, which is the same linear shape as the rotation instruction mark 11 in a plan view, and is provided on the outer peripheral surface of the fluid pipe 1 on both sides of the divided case body. 13 are provided.

(B) shows a state in which the divided case body 4 is rotated to the left, and the divided case body 4 is rotated such that the relationship between the rotation instruction mark 11 and the rotation reference mark 13 is in the state (A).
By rotating, the axis of the through-hole 3 and the axis of the guide tube 4a can be matched.

As described above, when the gate valve device of the present invention is used, the direction and amount of movement and rotation of the divided case body 4 with respect to the fluid pipe 1 can be known, so that the divided case body 4 is moved and rotated in reverse. Thereby, the axis of the through hole 3 and the axis of the guide tube 4a can be made coincident, and the gate valve device can be used again.

The present invention is not limited to the above embodiment.

In the embodiment, the indication mark is made of resin paint. However, the indication mark may be cast on the upper lid, a tape may be attached, and the indication mark is provided on the upper lid. Is also good.

Although the reference mark is made of resin paint, a tape may be attached.

[0050]

According to the present invention, the divided case body moves in the direction of the pipe axis due to an earthquake or the like, or rotates about the pipe axis, and the guide tube and the fluid pipe provided in the divided case body are provided. When the axis of the through-hole formed in the hole shifts, a display device is provided to express the axis shift, so that the direction and amount of the axis shift can be confirmed, and the divided case body is displayed according to the display device. By moving or rotating the guide tube, the axes of the guide tube and the through hole can be aligned, and there is no possibility that the gate valve cannot be inserted into the fluid tube.

According to the second aspect of the present invention, since the display device includes only the marks provided on the fluid pipe and the divided case body, it is economical with less labor and cost, and there is no fear of failure.

According to the third aspect of the present invention, the direction of the pipe axis of the divided case body and the direction and amount of rotation about the pipe axis can be known, so that the axis of the through hole and the axis of the guide pipe are surely aligned. Can be.

According to the fourth aspect of the present invention, even if one of the tube axis reference marks is hidden under the divided case body by the movement of the divided case body and cannot be seen from the outside, the other tube axis reference mark can be seen, so that the moving direction can be changed. Can be confirmed.

[0054]

[Brief description of the drawings]

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

FIG. 2 is also a partially cutaway side view.

FIG. 3 is a sectional view taken along the line II of FIG. 1;

FIG. 4 is also an explanatory view of the movement in the tube axis direction.

FIG. 5 is also an explanatory view of a rotational movement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Gate valve device 3 Through-hole 4 Divided case body 4a Guide pipe 4b Flange part 4c Temporary fixing bolt 5 Packing 6 Top lid 7 Plug lid (guide pipe) 8 Plug body (gate valve) 9 Spindle 10 Pipe axis indication mark 11 Rotation instruction mark 12 Pipe axis reference mark 13 Rotation reference mark

Claims (4)

[Claims] 1. An outer peripheral surface of a fluid pipe having a through hole,
A divided case body having a guide tube coaxial with the through hole and a gate valve housed in an appropriate place inside the guide tube is mounted, and the gate valve in the guide tube is inserted into the fluid pipe through the through hole, A gate valve device for shutting off a flow of a fluid, wherein a display device expressing an axis shift between the through hole and the guide tube is provided in each of the divided case and the fluid tube. apparatus. 2. The gate valve device according to claim 1, wherein the display device includes an instruction mark provided on an outer surface of the divided case body and a reference mark provided on an outer peripheral surface of the fluid pipe. 3. The indication mark is composed of a pipe axis indication mark representing movement in the pipe axis direction and a rotation indication mark representing rotation about the pipe axis, and the reference mark is a movement in the pipe axis direction. 3. The gate valve device according to claim 2, comprising a pipe axis reference mark serving as a reference and a rotation reference mark serving as a reference for rotation about the pipe axis. 4. The gate valve device according to claim 2, wherein the reference mark is provided on an outer peripheral surface of the fluid pipe on both sides of the divided case body attached to the fluid pipe.