JPS6212424B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application and Summary of the Invention] The present invention relates to a valve, particularly a valve of a type in which an operating shaft portion or the like does not penetrate a channel wall, and can be used as a simple valve.

[Prior art and its problems] As this type of valve device, the one shown in Fig. 3 has already been proposed (Utility Model Publication No. 35-22487), which has an operating means in the flow path. Ball valve 2
The operating means is a combination of a band spring 6 bent in a substantially dogleg shape and a coil spring 7, and the coil spring 7 constantly presses the ball valve 2 against the valve seat 4 side, and the movable end of the band spring 6 is used to control the valve seat 4. This is the view facing the downstream side of seat 4. In this case, since the bent part of the band spring 6 is housed so as to match the elastic wall 8, the band spring 6 can be stretched by pushing this elastic wall, or conversely, the pushing force can be released to bend the band spring 6. When the state is restored, the ball valve 2 is opened and closed. In this conventional device, since a part of the operating means does not penetrate the channel wall surface, there is no fear of external leakage.

However, in this case, there is a problem that the pressure loss is large because there are obstacles such as the operating means and the ball valve 2 in the flow path.

On the other hand, there is a device as shown in FIG. 4 (Utility Model Application No. 48-99520) that solves this problem.

This body 1 has a cylindrical body with both end faces closed, and an inlet 12 is provided in the center of the body, and an outlet 1 is provided in the center of one closed end of the body 1.
3, a ball valve 2 is movably accommodated in the main body 1, and a flexible pipe 9 is connected to the inlet 12 and outlet 13. In this case, since the pipes 9, 9 have flexibility, the posture of the main body 1 can be tilted freely,
When this attitude is specified as necessary, the ball valve 2 moves in the direction of its own weight to open and close the outlet 13.

In this case, when the main body 1 is tilted so that the ball valve 2 is separated from the outlet 13, the valve is opened. In this state, the ball valve 2 is placed at a position away from the flow path from the inflow port 12 to the outflow port 13, so there is no operating means or the like intervening in the flow path within the valve device, which is different from the conventional example. The pressure loss is extremely small compared to the standard.

However, in this case, when opening and closing the valve, the tilted posture of the main body 1 is changed, and the relative position between the ball valve 2 and the outlet 13 is specified by its own weight, and the valve is maintained in the open or closed state. Because of this, even a slight change in the tilting position makes the valve opening and closing unstable.

[Technical Problem] The present invention is directed to the above-mentioned method in which a valve seat 4 is formed in a flow path of a main body 1, a ball valve 2 that faces the valve seat 4 is accommodated in the main body 1, and In this valve device, the flow path can be opened by moving the ball valve 2 away from the valve seat 4 by applying a mechanical external force from The technical challenge is to be able to hold it in a position that has been removed.

[Technical Means] The technical means of the present invention taken to solve the above-mentioned technical problems is as follows: ``The main body 1 is made of an elastically deformable material, A valve chamber 5 capable of accommodating the ball valve 2 is provided at a position offset from the flow path, and the valve chamber 5 and the flow path in the main body are communicated via an inlet 51. The diameter of the valve chamber 5 is set to be slightly smaller than the diameter of the ball valve 2, and the size of the valve chamber 5 is set to be large enough to accommodate the ball valve 2.

[Effect] The above technical means works as follows.

Since the main body 1 is made of an elastically deformable material, when the ball valve 2 is pushed up against the inlet 51 from the so-called closed state where it is in contact with the valve seat 4, the ball valve 2 is forced out of the inlet 51. is housed within the valve chamber 5. Here, the minimum opening interval of the inlet 51 is set to the ball valve 2.
Since it is set slightly smaller than the diameter of
Even if the upward force applied to the wall surface is removed, the ball valve 2 is held in the valve chamber 5 without falling from the valve chamber 5 into the flow path, and is in the open state. Further, since the valve chamber 5 is located away from the flow path of the main body 1, the ball valve 2 is also located outside the flow path.

Next, from the valve open state, the inlet 51 of the valve chamber 5 is opened.
When you push down the wall facing the ball valve 2, the valve chamber 5
The ball valve 2 is caused to escape from the inlet 51 into the flow path in the main body 1, and due to the flow, the ball valve 2 is brought into pressure contact with the valve seat 4 located on the downstream side, so that the ball valve 2 is in a closed state.

[Effects] Since the present invention has the above configuration, it has the following unique effects.

In the open state, the ball valve 2 is housed in the valve chamber 5 that is offset from the flow path, and in this state, there is nothing in the flow path of the main body 1 that obstructs the flow, and the ball valve 2 is housed in the valve chamber 5 that is offset from the flow path. Compared to this, the pressure loss is extremely reduced.

The valve is opened and closed by deforming the flow path wall 41 or the valve chamber 5 made of an elastic material and directly moving the ball valve 2.
is pressed against the valve seat 4 by fluid pressure when the valve is closed, and is housed in the valve chamber 5 so that it cannot easily escape when the valve is open. Therefore, the valve is not easily affected by the open/closed state, and both the open and closed states are stable.

[Example] Next, the above-described example of the present invention will be described in detail with reference to FIGS. 1 and 2.

In the valve device according to the embodiment of the present invention, the main body 1 is a cylindrical body made of an elastically deformable material such as rubber, and a pair of valve seats 4, 4 are disposed in the cylindrical body so as to face each other, Between the valve seats 4, 4, and the main body 1
A valve chamber 5 is provided at a position offset from the flow path, and the valve chamber 5 and the flow path in the main body 1 are communicated via an inlet 51, and the minimum opening interval of the inlet 51 is set to be smaller than the diameter of the ball valve 2. In addition to setting it slightly smaller, the valve chamber 5
The size of the ball valve 2 is set to be large enough to accommodate the ball valve 2. Further, the spacing between the valve seats 4, 4 is set to a predetermined value so that these valve seats sandwich the ball valve 2 in the closed state.

Therefore, when the pipe wall 41 between the valve seats 4, 4 is pushed up, the ball valve 2 is accommodated in the valve chamber 5 through the inlet 51, as shown in FIG. Since the minimum opening interval of the inlet 51 is set to be slightly smaller than the diameter of the ball valve 2, even if the above-mentioned pushing up force is removed, the ball valve 2 does not fall from the valve chamber 5 into the flow path. The valve is housed and held within the valve and is in an open state.

From this open state, when the top wall of the valve chamber 5 is pushed down, the ball valve 2 is forced to escape from the inlet 51 and is press-fitted between the valve seats 4, to enter the closed state.

In this embodiment, in the closed state, the ball valve 2
Since the main body 1 is in close contact with both valve seats 4, 4, the flow path is blocked no matter which side of the main body 1 is on the upstream side, so there is no restriction on the mounting direction of the valve device with respect to the piping flow path. In this embodiment, it goes without saying that even if only one of the valve seats 4, 4 is provided, if the valve seat 4 is located on the downstream side with respect to the valve chamber 5, the flow path can be opened and closed.

Rubber and the like usually have a high degree of elastic deformation, so they easily apply mechanical deformation to the pipe wall, but they have the disadvantage of being inferior in pressure resistance. In order to overcome this drawback, a structure may be adopted in which the elastic tube is coated with silk cloth, nonwoven fabric, etc., or the elastic tube is inserted into the cross section.

Although the valve opening and closing operations may be performed directly by hand, it is also possible to open and close the valve using mechanical drive means.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the embodiment of the present invention in the valve closed state, FIG. 2 is a cross-sectional view of the embodiment of the present invention in the open state, and FIGS. 3 and 4 are cross-sectional views of the conventional example. 1...Main body, 2...Ball valve, 4...Valve seat, 5...Valve chamber, 5
1...Entrance.

Claims (1)

[Claims] 1 A valve seat 4 is formed in the flow path of the main body 1, and the ball valve 2 facing the valve seat 4 is accommodated in the main body 1, and a mechanical external force from outside the flow path is applied to the ball valve 2. In the valve device in which the flow path can be opened by moving the valve away from the valve seat 4, the main body 1 is made of an elastically deformable material, and the main body 1 is made of an elastically deformable material, and the A valve chamber 5 capable of accommodating the ball valve 2 is provided at a biased position, and the valve chamber 5 and the flow path in the main body are connected to an inlet 51.
A valve device in which the minimum opening interval of the inlet 51 is set to be slightly smaller than the diameter of the ball valve 2, and the size of the valve chamber 5 is set to a size that can accommodate the ball valve 2.