JPH0338531Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a valve device equipped with a fixed type valve.

[Technical background of the invention and its problems]

Among piping valves, for example, butterfly valves employ a structure in which the valve is placed between flanges of piping and the flanges are tightened with bolts to secure the valve in place.

4 to 6 show an example of a valve device equipped with a clamp-fixed butterfly valve. In the figure, 1 is a butterfly valve. This butterfly valve 1 has an annular valve case 2.
, a valve body 3 rotatably provided inside the valve case 2, and a shaft hole 2 formed in the valve case 2.
The valve body 3 includes an operating shaft 4 that is inserted into the valve body 3 and connected to the valve body 3, and an operating handle 5 that rotates the valve body 3 via the operating shaft 4. Reference numerals 6 and 7 denote tubes connected to the butterfly valve 1, and flanges 8 and 9 are formed at opposing ends of these tubes 6 and 7, respectively. Each flange 8, 9 has a plurality of holes 1 that penetrate in the flange thickness direction on a circle drawn with a diameter larger than the outer diameter of the valve case 2 of the butterfly valve 1.
0 and 10 are formed with an interval between them. 11 is a tightening bolt, and 12 is a nut.

The butterfly valve 1 has flanges 8 on pipes 6 and 7,
9, and the end surfaces of the openings at both ends of the valve case 2 are connected to each pipe 6, 9 through packings 13, 13.
The flanges 8 and 9 of 7 are brought into contact with each other. Tightening bolts 12 are inserted into opposing portions of each hole 10 formed in the flange 8 of the tube 6 and each hole 10 formed in the flange 9 of the tube 7, and a nut 12 is inserted into each of these tightening bolts 11. They are screwed together and tightened. As a result, the flanges 8 and 9 of each pipe 6 and 7 are clamped and fixed by clamping the butterfly valve 1 from both ends thereof, and
The butterfly valve 1 is clamped and fixed between the flanges 8 and 9 by the tightening force of the tightening bolt 11.

A valve device equipped with such a clamp-fixed valve has the advantage of reducing piping space, but on the other hand, the following problems arise during assembly and disassembly work. That is, when assembling, when the butterfly valve 1 is placed between the flanges 8 and 9 of each pipe 6 and 7 and the tightening bolt 11 is passed through the hole 10 and 10 of each flange 8 and 9 and tightened, Until the butterfly valve 1 is clamped and fixed between the flanges 8 and 9, it is necessary to hold the butterfly valve 1 so that it does not fall off. In this case, conventionally, an operator tightens the tightening bolt 11 while holding the butterfly valve 1 by hand. Also, during disassembly, if the nut 12 is removed from the tightening bolt 11 and the tightening bolt 11 is pulled out from the holes 10, 10 of each flange 8, 9, the holding force of the butterfly valve 1 is lost, so the butterfly valve 1 is removed. It must be held so that it does not fall off. Conventionally, in this case as well, the operator removes the tightening bolt 11 while holding the butterfly valve 1. However, carrying out the assembly and disassembly work while holding the butterfly valve 1 in this way is very troublesome and time-consuming, and there is a risk that the worker may accidentally drop the butterfly valve 1 and damage the valve. There is a risk of injury.

[Purpose of invention]

This invention was made based on the above circumstances,
It is an object of the present invention to provide a valve device that can hold the valve without the operator's hands during assembly and disassembly, thereby preventing the valve from falling off, and allowing the work to be carried out easily and safely.

[Summary of the idea]

The valve device of the present invention is a device in which a valve is placed between a pair of flanges formed at the end of a pipe connected to the valve, and the flanges are tightened with a fastener to clamp and fix the valve, A holding part is formed on the valve case and one flange of the valve, respectively.
The valve is always held on one flange by locking a holder to these holding parts.

[Example of idea]

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

Figures 1 to 3 show a valve device equipped with a clip-in type butterfly valve, which is an embodiment of the present invention, and the same parts as in Figures 4 to 6 are given the same reference numerals. There is.

The butterfly valve 1 has flanges 8 on pipes 6 and 7,
9, and is clamped and fixed between the flanges 8 and 9 by tightening bolts 11 and nuts 12 passed through the respective holes of the flanges 8 and 9.

Further, protrusions 14, 14 are formed on both sides of the peripheral wall of the valve case 2 in the butterfly valve 1, respectively.
Holding holes 15, 15 are formed therethrough along the axial direction. The flange of one of the pipes, for example, the flange 8 of the pipe 6, has threaded holes 16, 1 at positions opposite to the holding holes 15, 15 formed in the valve case.
6 is formed. The screw holes 16, 16 are formed as blind holes in the flange 8 from the surface thereof that comes into contact with the valve case 2. And the holding bolt 17,1
7 is passed through each holding hole 15, 15 of the valve case 2, and then screwed into each screw hole 16, 16 of the flange 9 and tightened. Therefore, the valve case 2 is held in contact with the flange 8 of one of the pipes 6. Here, the holding holes 15, 15 of the valve case 2 and the screw holes 16, 16 of the flange 8 are holding parts,
The bolts 17, 17 serve as holders. Note that these holding holes 15, 15, threaded holes 16, 16, and bolts 17, 17 are different from those for fixing the butterfly valve 1 between the flanges 6 and 7 by tightening the tightening bolt 11, and are used only to secure the butterfly valve 1 to the pipe. 6
The butterfly valve 1 is held in order to prevent it from falling off the flange 8 of the butterfly valve 1, and any size may be sufficient as long as it has enough strength to withstand only the weight of the butterfly valve 1. Further, the holding bolt 17 can be provided using the space for arranging the butterfly valve 1. Therefore, the structure for holding the butterfly valve 1 on the flange 8 is simple.

In the valve device configured in this way, the butterfly valve 1 is always connected to the pipe 6 by the holding bolt 17.
It is held on the flange 8 of. When disassembling the valve device, remove the nut 12 screwed onto the tightening bolt 11 and attach the tightening bolt 11 to the pipes 6, 7.
The flanges 8, 9 are pulled out through the holes 10, 10 of the flanges 8, 9 to separate the flanges 8, 9 from each other. As a result, the state in which the butterfly valve 1 is clamped and fixed between the flanges 8 and 9 is released. However, in this case, the butterfly valve 1 is held on the flange 8 of one of the pipes 6 by the holding bolts 17, so it will not fall off. Therefore, the operator does not need to hold the butterfly valve 1 by hand, and only has to perform the work of extracting the tightening bolt 11. In addition,
If it becomes necessary to remove the butterfly valve 1, insert the retaining bolt 17 into the threaded hole 1 of the flange 8 of the pipe 6.
6 and the holding hole 15 of the valve case 2 to release the holding state between the butterfly valve 1 and the flange 8. The removed butterfly valve 1 is held again on the flange 8 of the pipe 6 before assembling the valve device.

When assembling the valve device, the butterfly valve 1 is placed between the flanges 8 and 9 of the pipes 6 and 7, and the tightening bolts 11 are inserted into each hole of the flanges 6 and 7.
0 and 10, and screw the nut 12 on and tighten. In this case as well, since the butterfly valve 1 is held in advance on the flange 8 of the pipe 6 by the holding bolts 17, there is no need for the operator to hold the butterfly valve 1 by hand, and only the work of tightening the tightening bolts 11 is performed. Just do it.

In addition, in the above-described embodiment, a butterfly valve was used as the fixed type valve, but the present invention is not limited to this, and other types of valves may be used. Further, the structure for holding the valve on the flange of the pipe is not limited to the embodiment.

[Effect of idea]

As explained above, according to the present invention, the valve has a simple structure and is held by the flange of one of the pipes, so there is no need for the operator to hold the valve by hand during assembly and disassembly. The work can be carried out easily, and the work can be carried out safely without the risk of damage to the valve or injury to the worker due to the valve falling off.

[Brief explanation of drawings]

1 to 3 show an embodiment of the valve device of the present invention, and FIG. 1 is a front view showing an assembled state;
Figure 2 is a front view showing an exploded state, Figure 3 is a side view of the same, Figures 4 to 6 show a conventional valve device, Figure 4 is a front view showing an assembled state, and Figure 5 is an exploded view. A front view showing the state, and FIG. 6 is a side view of the same. 1... Butterfly valve, 2... Valve case, 3... Valve body, 6, 7... Pipe, 8, 9... Flange, 10... Hole, 11... Tightening bolt, 12...
... Nut, 15 ... Holding hole, 16 ... Screw hole, 1
7...Holding bolt.

Claims (1)

[Claims for Utility Model Registration] (1) A valve, a pair of flanges formed at the ends of two pipes connected to the valve, located at both ends of the valve, and abutting against the valve case of the valve; , a fastener for clamping and fixing the valve between the flanges by tightening the pair of flanges, a holding portion is formed in the valve case of the valve and the one flange, and the valve case A valve device comprising a retainer for preventing the valve from falling off, which retains the valve case on the one flange by engaging with the retainer of the flange and the retainer of the flange, respectively. (2) The valve device according to claim 1, wherein the holding parts of the valve case and the flange are holes, and the holding tool is a bolt that is passed through these holes and tightened. (3) The valve device according to claim 1 or 2, wherein the valve is a butterfly valve.