JPH0743069B2 - Tube blocker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to, for example, a bypass pipe connection without stopping water supply in a water main, that is, a branch pipe connected to the water main without interruption. The present invention relates to a water stop device used for stopping a branch pipe with a sluice valve after removing a bypass pipe.

[Conventional technology]

For example, to stop water in the branch pipe with the gate valve, conventionally, as shown in FIG. 12, the gate valve (C) is closed to stop the water, and the branch pipe (B) is stopped at the end. Means for attaching the water lid (E) were taken. (A) is a water main.

[Problems to be Solved by the Invention]

However, in the case of the above-mentioned conventional means, since the sluice valve remains attached to the branch pipe, the sluice valve cannot be used for the connection of the bypass pipe to the water main at the next uninterrupted water supply. Of course, there were the following inconveniences.

In other words, since the branch pipe is equipped with a sluice valve, the amount of protrusion of the protrusion protruding laterally from the water main becomes large, and as a result, when excavating nearby by gas construction, road construction, etc. Is an obstacle, and the sluice valve is easily damaged by hitting the excavator.

On the other hand, even if this is the case, stopping water supply at the mains of the water supply, removing the sluice valve from the branch pipe, and closing the end opening of the branch pipe with this sluice valve with a water stop lid is not seen from the water supply surface. There are cases where it cannot be implemented.

In short, in the past, there was no device for removing water by shutting off the sluice valve while supplying fluid.

An object of the present invention is to provide a water shutoff device that can remove water by shutting off a sluice valve while supplying fluid.

[Means for Solving the Problems]

A characteristic configuration of a water stop device according to the present invention is provided with a mounting portion for mounting on a sluice valve so as to close the other end opening of the sluice valve connected at one end opening of the linear flow path to the end portion of the pipe. A lid, a cylindrical first operation tool that penetrates the shaft core portion of the lid in a sealed state so as to slide in the axial direction, a second operation tool that penetrates the first operation tool, and the first operation tool. An operating means for relatively moving and fixing the operation tool and the second operation tool in the axial direction, and an operation means that is detachable with respect to the inner end of the first operation tool, and is larger than the inner diameter of the pipe and the diameter of the linear passage. A small-diameter first valve body,
A second valve body, which is detachable from the inner end of the second manipulation tool projecting from the first manipulation tool and has a diameter smaller than the inner diameter of the pipe and the diameter of the linear passage, is provided. While both valve bodies are located inside the pipe, the valve body holds the valve body in the axial direction so that the inner surface of the pipe and the outer periphery of the valve body are sealed by closely contacting the inner surface of the pipe. A sealing member that deforms into a pipe is provided, and a fixture for fixing the valve body to the pipe is provided, and further, apart from the operating means, the both valve bodies are moved relative to each other in the axial direction. The holding fixture for fixing the holding state is flexible so as to prevent movement of the two valve bodies in the relative separating direction by contact with the both valve bodies, while allowing movement in the relative approaching direction. The point is that it is installed in the closed state. The actions and effects of it are as follows.

[Action]

First, the procedure of use will be explained. After the lid is attached to the sluice valve, the sluice valve is opened and the first operating tool is slid in this state so that both valve bodies pass through the linear flow path of the sluice valve. Located inside. In this state, the operating means relatively moves the first operating tool and the second operating tool to clamp the sealing material with both valve bodies, and the pipe is closed by maintaining this clamping state. After that, the fixation of the sluice valve to the pipe is released, and the sluice valve is disengaged from the pipe in the axial direction.In this state, the valve body is fixed to the pipe with the fixing tool, and both valve bodies are held with the holding fixture. Then, the first operating tool and the second operating tool are removed from the valve body and the sluice valve is removed.

At this time, the holding fixture prevents the valve bodies from being separated from each other and maintains the pinched state of the seal material, but the valve body is provided in a state in which the valve bodies are allowed to approach each other. The clamping fixture does not interfere with the clamping operation.

Moreover, since the holding fixture is not provided for the pipe to be closed but is provided on the valve body itself, no special processing is required to attach it to the pipe to be closed.

As is clear from the above-mentioned procedure, with the lid closing the opening of the sluice valve, the valve body and the sealing material for occluding the pipe can be inserted through the sluice valve into the pipe to close the pipe.

〔The invention's effect〕

As a result, the present invention can remove the sluice valve from the pipe and close the pipe without leaking fluid from the pipe even when fluid is being supplied to the pipe. It has become possible to provide a pipe closing device useful for stopping water in a branch pipe connected to the. Of course, after removing the sluice valve, it is possible to attach another sluice valve to the pipe without leaking fluid from the pipe, that is, by exchanging the sluice valve, by performing the work in the reverse procedure to the above. .

Moreover, since a clamping fixture different from the operating means for operating with the sluice valve attached is used and attached to the valve body itself, a short clamping fixture that does not need to be operated through the sluice valve. It is possible to downsize the entire pipe closing device after removing the operating means by using the, and a simple structure without requiring a special structure for fixing and fixing the valve body to the closed pipe in a pinched state. There is an advantage that can be configured with.

〔Example〕

 Next, examples of the present invention will be described.

As shown in FIG. 3, a branch pipe (B) is connected to the main water pipe (A), and a sluice valve (C) having a linear flow path (a) is provided at an end of the branch pipe (B). In a branch structure in which a flange connection is made at one end opening thereof, and a bypass pipe (D) is connected to the other end opening of the sluice valve (C) by a flange, the branch pipe is removed after the bypass pipe (D) is removed. A tube closing device used for stopping water in (B), which is shown in FIG.
As shown in FIG. 2, a flange (1a) for connecting the flange (1a) to the sluice valve (C) so as to close the other end opening of the sluice valve (C) from which the bypass pipe (D) has been removed (installation) (An example of a part), a water stop mechanism, an insertion operation mechanism, and a second lid (2) for closing the opening of the branch pipe (B) from which the sluice valve (C) is removed. Consists of.

As shown in FIGS. 1 and 2, the water shutoff mechanism includes a tubular first operation tool (3) that slidably penetrates an axial core portion of the lid (1) in an axial direction. A second operating tool (4) penetrating the inside of the first steering tool (3), and operating means for relatively moving and fixing the first operating tool (3) and the second operating tool (4) in the axial direction. (5) and a water shutoff valve device. In addition,
The lid (1) is provided with an O-ring (1b) for sealing a gap with the first operating tool (3).

The operating means (5) forms a male screw (5a) on the outer end portion of the second operating tool (4), and in the state where the axial center position is restricted with respect to the first operating tool (3). It is a means for providing a nut (5b) to be screwed onto the male screw (5a).

In the water shutoff valve device, a bracket (3a) fixed to an inner end of the first operation tool (3) has a first diameter smaller than an inner diameter of the branch pipe (B) and a diameter of the linear flow path (a). Of the first and second two valve bodies (6) and (7), the first valve body (6) is detachably attached via the bolt (8), and the first valve body of the second operation tool (4) is attached. The second valve body (7) is detachably attached to the inner end projecting from the operation tool (3), and both valve bodies (6),
Holding between both valve bodies (6) and (7) in the axial direction by both valve bodies (6) and (7) in a state where both valve bodies (6) and (7) are located in the inner branch pipe of the branch pipe (B). By means of an annular seal member (9), which comes into close contact with the inner surface of the branch pipe (B) and deforms so as to seal between the inner surface of the branch pipe (B) and the outer circumferences of the valve bodies (6), (7) And the valve bodies (6) and (7) are attached to a branch pipe (B)
Fixing tool (10) and both valve bodies (6), (7) for fixing to
A holding fixture (11) for fixing the to-be-held state is provided.

The means for detachably attaching the second valve body (7) to the second operating tool (4) is a male screw (4a) formed at the protruding inner end of the second operating tool (4) for the second valve. It is a means to be screwed into the screw hole (7a) formed in the body (7).

The fixture (10) is a set bolt screwed into a valve seat (6a) fixed to the first valve body (7) so as to be pressed against the inner surface of the branch pipe (B).

The holding fixture (11) penetrates the first valve body (6) and is screwed into a screw hole (7b) formed in the second valve body (7) at its penetrating end so as to be tightened. Thus, the head (11a) is a pulling bolt that abuts the first valve body (6) and pulls the second valve body (7) toward the first valve body (6).

The insertion operation mechanism has an insertion bar (12) which is inserted through the outer end of the second operation shaft (4) and abuts the outer end of the first operation shaft (3), and the insertion bar (12). It is composed of an insertion bar (12) stretched between both ends and the water main (A) and a wire (14) with a jack (13) for pulling and moving to the water main (A) side.

The nut (5b) of the operating means (5) is brought into contact with the insertion bar (12) of the insertion operating mechanism to move the nut (5b) to the first position.
The movement of the operation tool (3) is restricted to the inner end side in the axial direction.

That is, the operating means (5) and the pulling bolt (11)
Both hold the valve bodies (6) and (7) in a pinching manner. However, regarding the operating means (5), the nuts (5b) are brought into contact with the insertion bar (12) so that both valve bodies (6) ), (7) are prevented from being separated from each other, but relative proximity (holding operation) of both valve bodies (6) and (7) is allowed, and the head of the pulling bolt (11) ( Abutment of 11a) on the first valve body (6) prevents relative separation of both valve bodies (6) and (7), but allows relative proximity of both valve bodies (6) and (7). Therefore, there is no mutual interference between the two.

In addition, a different diameter portion (4b) is formed on the outer end of the second operation tool (4) for rotating the second operation tool (4), and the different diameter portion (4b) is formed on the bracket (3a). Is the second operation tool (4)
There is an O-ring (15) that seals between and.

The procedure for using the above tube closing device will be described below.

[1] As shown in FIG. 3, the gate valve (C) is closed.

[2] Remove the bypass pipe (D) from the sluice valve (C), and as shown in FIG. 4, insert the first operation tool (3) after removing the shunt pipe (D) of the sluice valve (C). Attach the lid (1) and set the insertion operation mechanism. Of course, the second operating tool (4) is inserted in the first operating tool (3),
Valve bodies (6) and (7) are attached to the inner ends of the operation tool (3) and the second operation tool (4).

[3] As shown in FIG. 3, the sluice valve (C) is opened, and the valve bodies (6) and (7) are inserted into the branch pipe (B) through the sluice valve (C).

[4] As shown in FIG. 6, tighten the nut (5b) of the operating means (5) to pull up and move the second operating tool (4) outward with respect to the first operating tool (3). Both valve bodies (6),
The sealing material (9) is clamped and deformed by (7), and the branch pipe (B) is temporarily stopped.

[5] As shown in FIG. 7, the fixation of the sluice valve (C) to the branch pipe (B) is released, and the sluice valve (C) is guided by guiding the first first operation tool (3). Remove from (B).

[6] As shown in FIG. 8, the valve body (6) is fixed to the branch pipe (B) by tightening the set bolt (10).

[7] As shown in FIG. 9, the drawing bolt (11) is tightened to draw the second valve body (7) toward the first valve body (6) to perform the main water stoppage.

[8] As shown in FIG. 10, the first operation tool (3) and the second operation tool (4) are removed from the valve bodies (6) and (7), and the insertion operation mechanism and the gate valve (C) are removed. To do.

[9] As shown in FIG. 11, fix the second lid (2) to the branch pipe (B).

In addition, the said sluice valve (C) is a water pipe main (A) with a branch pipe (B) by the uninterrupted public water law which does not stop the water flow in a water main (A).
It is provided because the branch pipe (B) is stopped when it is connected to.

Of course, the branch pipe (B) may be other than the one provided by the uninterrupted water law.

It should be noted that reference numerals are added to the claims for convenience of the drawings, but the present invention is not limited to the accompanying drawings by the entry.

[Brief description of drawings]

1 to 11 show an embodiment of a pipe closing device according to the present invention, and FIG. 1 is a sectional view showing a state before insertion into a pipe, FIG.
The figure is a sectional view showing a state of insertion into a pipe, FIGS. 3 to 7 are schematic sectional views showing a procedure, and FIGS. 8 to 11 are sectional views showing a water stopping procedure. FIG. 12 is a schematic sectional view showing a conventional example. (B) ... pipe, (a) ... straight passage, (C) ... gate valve, (1a) ... mounting part, (1) ... lid, (3) ... first
Operation tool, (5) ... Operation means, (6), (7) ... Valve body, (9) ... Seal material, (10) ... Fixing tool, (11) ...
... a holding fixture.

Claims (2)

[Claims] 1. To mount a sluice valve (C) so as to close the other end opening of a sluice valve (C) connected to the end of a pipe (B) at one end opening of its linear flow path (a). Mounting part (1
A lid (1) provided with a), a tubular first operating tool (3) penetrating the shaft core portion of the lid (1) in a sealed state so as to be slidable in the axial direction, and the first operation. A second operating tool (4) penetrating the inside of the tool (3), and operating means (5) for relatively moving and fixing the first operating tool (3) and the second operating tool (4) in the axial direction. A first valve element (6) which is detachable from the inner end of the first operation tool (3) and has a diameter smaller than the inner diameter of the pipe (B) and the diameter of the linear passage (a), Detachable from the inner end of the second operation tool (4) protruding from the first operation tool (3),
A second valve body (7) having a smaller diameter than the inner diameter of the pipe (B) and the diameter of the linear passage (a) is provided, and both valve bodies (6) and (7) are provided with a double valve. Body (6),
The inner surface of the pipe (B) is in close contact with the inner surface of the pipe (B) by holding the valve bodies (6) and (7) in the axial direction while the (7) is positioned inside the pipe (B). And valve body (6),
A fixture for fixing the valve bodies (6) and (7) to the pipe (B) by interposing a sealing material (9) that deforms so as to seal the outer circumference of (7). 10) is provided, and further, apart from the operating means (5), a holding fixture (11) for fixing the two valve bodies (6), (7) in a holding state by moving them relative to each other in the axial direction. , The both valve bodies (6),
In contrast to (7), the valves (6) and (7) are mounted in a flexible state so as to allow them to move in the relative approaching direction while preventing them from moving in the relative separating direction by abutment. A tube closure device. 2. The set tool (10) is a set bolt which is screwed to the first valve body (6) and fixed by being pressed against the inner surface of the pipe (B). The tube closing device according to the item.