JPH11230385A - Valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent cut-off of a flow when a valve is switched. SOLUTION: This valve device is composed of a body 1 having passages 1a, 1b, 1c, and a valve element 3 for displacing a communication part 3b communicating between the passages, so as to change over the communication between a condition in which the passages 1a, 1b communicated with each other, and a condition in which the passages 1a, 1c are communicated with each other. A passage defined between the valve element 3 and the valve body 1 straddes the passages 1b and 1c in the valve body 1 at an arbitrary position on the way of the changeover between the condition in which the passages 1a, 1b are communicated with each other, and the condition in which the passages 1a, 1c are communicated with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various valve structures such as a switching valve and a mixing valve, and a valve device using the same.

[0002]

2. Description of the Related Art As a valve device provided in a piping system for a fluid such as water or air, a valve body such as a cylindrical body or a cone is rotatably arranged in a main body, and provided in a flow path provided in the main body and a valve body. 2. Description of the Related Art A plug valve or the like is widely used in which a flow path is formed by matching and penetrating a flow path, and a flow path of a valve body is not made to coincide with a flow path provided in a main body to cut off and switch the flow path.

FIGS. 4a), 4b) and 4c) are schematic views showing the structure and operation of a conventional valve device. In the figure, reference numeral 1 denotes a substantially cylindrical body provided with flow paths 1a, 1b, and 1c at 90-degree intervals on the side surfaces of the cylinder, and 2 denotes a substantially cylindrical valve body having an L-shaped inside. The main body 1 is provided with a communication channel, and is rotatable in the direction of arrow R in the figure by a separate operating means (not shown). Such a valve device is also applied to, for example, a hot and cold water mixing valve, a switching valve, or the like, and performs switching such that a valve element rotates to block one flow path and provide another flow path depending on the rotation angle. This is one of the structural features.

[0004]

Referring to FIG. 4, a description will now be given of the conventional problems together with an explanation of the operation. In the state of FIG.
When the fluid flows in from a, it reaches the flow path 1b along the arrow in the direction of the arrow α in the figure.

Next, the flow path is switched by rotating the valve body 2 by 90 degrees in the direction of arrow R, and the state in the middle thereof is shown in FIG. In the state of FIG. 4B), the flow of the fluid that has flowed in from the flow path 1a until now is stopped by the valve body 2 and stops at the arrow α ′ in the figure. At this time, the flow path 1a is at a flow rate of 0 because the flow is naturally interrupted. When a circulating device (not shown) such as a pump is used, a load is applied, and the life and performance are deteriorated. Cause malfunctions.

FIG. 4c) shows that the switching operation is completed by further rotating the valve element 2 in the direction of the arrow R, and the flow path has exited the flow path 1c of the main body 1 in the direction of the arrow α in the figure. This will switch to the β direction.

In general, it is known that the above-described problem can be suppressed by performing the switching operation after stopping the circulating device. However, in that method, the steps of “pump stop” → “switching valve operation” → “pump operation restart” are performed, and the flow of the fluid into the flow path after the desired switching is delayed by, for example, two In a jacuzzi bath or the like in which a jet water flow is desired to be alternately output from the nozzle, the operation is temporarily stopped every time switching is performed, and it is difficult to obtain a continuous flow.
In order to solve this problem, for example, when circulating means such as a pump is provided independently for two nozzles, or when two are connected in parallel and a pump having twice the capacity is used,
There were problems such as an increase in the size of the pump and an increase in cost.

The present invention aims to obtain a valve device in which the flow is not interrupted by switching the flow path.

[0009]

According to a first aspect of the present invention, there is provided a valve device including a main body having at least a first flow path, a second flow path, and a third flow path, and a communication between the flow paths. A valve body for displacing a portion to switch a flow state between the first and second flow paths and a flow state between the first and third flow paths, and is formed by the valve body and the main body. The flow path is at an arbitrary position in the middle of switching the flow state between the first and second flow paths and the flow state between the first and third flow paths by displacing the communication portion of the valve body, The main body is configured to span the second and third flow paths.

[0010] In the valve device according to the second aspect of the invention, the communicating portion of the valve body is displaced to change the flow state between the first and second flow paths and the first state.
At an arbitrary position in the middle of switching the flow state between the second and third flow paths, the sum of the communication cross-sectional areas of the respective communication flow paths formed while straddling the second and third flow paths is always constant. It is configured so that

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of an embodiment of a water on-off valve device according to the present invention, and is a diagram viewed from the same viewpoint as FIG. In the drawing, the same reference numerals as those in the conventional example indicate the same or corresponding parts. In the figure,
1 is a main body, 1a is a first flow path, 1b is a second flow path, 1c
Reference numeral 3 denotes a third flow path, which is provided with a rotation center shaft 3a (not shown) and is rotatably disposed in the main body 1. The valve 3 is provided with a communication portion 3b that forms a flow path.

Next, the operation of the above configuration will be described. In the state shown in FIG. 1A), when the fluid flows from the flow path 1a of the main body 1, the flow reaches the flow path 1b along the arrow in the direction of the arrow α in the figure.

Here, the valve body 3 is rotated by 90 degrees in the direction of arrow R to switch the flow path.
It is. In the state shown in FIG. 1B), the flow of the fluid that has flowed from the flow path 1a until then is distributed by the communicating portion 3b of the valve body 3 in the directions of the flow paths 1b and 1c, and the flow α in the direction of the flow path 1b and the flow path 1c Direction flow β. At this time, since the flow is naturally not interrupted in the flow path 1a, the flow rate is secured. When a circulating device such as a pump (not shown) is used, the flow is not interrupted without interrupting the flow path, so that the load is not interrupted. And there is no problem such as deterioration of life and performance.

Next, the valve body 3 is further rotated in the direction of arrow R to complete the switching operation, as shown in FIG. 1c), and the flow path exits the flow path 1c of the main body 1 in the direction of arrow α in the figure. This will switch to the β direction.

In the first embodiment, a valve device includes a main body 1 having at least three flow paths 1a, 1b, and 1c, and a valve body 3 that changes a rotational position to switch a flow state between the flow paths. In the flow path formed by the valve body 3 and the main body 1, the outlet flow paths 1b, 1 before and after the change of the main body are provided at an arbitrary position during the rotation of the valve body 3 to switch the flow state.
It is configured to straddle c. That is, the main body 1 having at least the first flow path 1a, the second flow path 1b, and the third flow path 1c, and the communication portion 3b communicating between the flow paths are displaced to form the first and second flow paths. Channels 1a, 1b
A valve body 3 for switching between a flow state between the first and third flow paths 1a and 1c, and a flow path formed by the valve body 3 and the main body 1; At an arbitrary position in the middle of switching the communication state between the first and second flow paths 1a and 1b and the flow state between the first and third flow paths 1a and 1c by displacing the communication portion 3b, The main body 1 is configured to span the second and third flow paths 1b and 1c.

According to the first embodiment, since the flow is not interrupted by the switching of the valve device, when a circulating device such as a pump is used, the flow rate is reduced by the primary interruption of the flow path by the switching. Since there is no state, no load is applied even in continuous operation, and problems such as deterioration of life and performance do not occur. Specifically, “pump stop”, which is generally performed in conventional flow path switching →
It is not necessary to take the operation steps of “switching valve operation” → “pump operation restart”, so that the fluid can smoothly flow into the flow path after the desired switching. In such a jacuzzi bus or the like, a continuous flow can be obtained without suspending operation every time switching is performed. In addition, there is no need to provide a circulating means such as a pump for two nozzles independently to solve the conventional problems, or to connect two in parallel and use a pump having twice the capacity. There is no problem such as cost increase and cost increase.

Embodiment 2 FIG. Another embodiment of the present invention will be described below together with its operation with reference to the drawings. 2 and 3 are explanatory views of an embodiment of the on-off valve device for water according to the present invention. FIG. 2 is a perspective view of the valve device according to the present embodiment, and FIGS. 3a), 3b), 3c) and FIG.
d) is basically based on “L” as viewed from the direction of arrow L in the perspective view of FIG. 2.
To d), and the operation shown in the attached drawing is a right side view showing the flow path cross section formed by the valve body 3 and the main body 1 as viewed from the flow paths 1c and 1b in each operation state. FIG. 2 and 3, the same reference numerals as those in the conventional example indicate the same or corresponding parts.

In FIG. 1, reference numeral 3 denotes a valve body provided with a rotating shaft 3a serving as a center of rotation and rotatably disposed on the main body 1. 1d is a lid of the main body 1.

Next, the operation of the above configuration will be described including the following operation. 2 and 3, flow paths 1a and 1
3b, b and 1c are formed on the side surface of the main body 1 at intervals of 90 degrees, and the valve body 3 has a cylindrical shape with a substantially semicircular cross section cut along a diameter line passing through the rotating shaft 3a. In the position of the valve body 3 in which the flow path 1a and the flow path 1b communicate with each other by the communication portion 3b in (1), a flat portion of the valve body 3 is seen from the flow path 1b side, and the flow path 1a When viewed from the flow channel 1c side, the cylindrical side surface portion of the valve element 3 is in a state of blocking the flow channel 1c from the flow channel 1a.

Next, FIG. 3B) shows a state in which the valve element 3 has slightly rotated about the rotation shaft 3a in the direction of arrow R in the figure. In this state, the flow path 1b which was completely
A cylindrical wall surface of the valve element 3 appears at the lower portion of the valve body 3 and blocks a part of the flow path 1b. At the same time, on the flow path 1c side, the cylindrical portion of the valve body 3 which has been blocked moves down to the lower side. Communication part 3b
Starts forming a flow path. At this time, the total cross-sectional area of the flow paths on the flow path 1b side and the flow path 1c side matches the state shown in FIG. 3A).

Subsequently, from the state of FIG. 3b), the valve body 3 further rotates in the direction of the arrow R around the rotary shaft 3a in the figure, and the state where the plane portion of the valve body 3 is horizontal is shown in FIG. 3c). is there.
In this state, the cylindrical wall surface of the valve body 3 which has begun to appear at the lower portion of the flow path 1b further rises to cut off half of the flow path 1b, and at the same time to close the valve body 3 which has been cut off on the flow path 1c side.
The flow path formed by the downward movement of the cylindrical portion becomes half of the total flow path. Also at this time, the total cross-sectional area of the flow paths on the flow path 1b side and the flow path 1c side matches the state shown in FIG. 3A).

FIG. 3D shows a state in which the valve body 3 is further rotated about the rotation shaft 3a in the direction of the arrow R from the state shown in FIG. 3C). In this state, the cylindrical wall surface of the valve element 3 that appears at the lower portion on the side of the flow path 1b further rises, and
At the same time as blocking most of the flow path b on the flow path 1c side, the cylindrical portion of the valve body 3 that has been blocked moves down, and the flow path formed is in a state of most of all the flow paths (in the figure, schematically). , FIG.
b) and FIG. 3d) are in a reversed state). Also at this time, the flow path 1
The total cross-sectional area of the flow path on the b side and the flow path 1c side matches the state shown in FIG. As described above, in an arbitrary switching state, all the flow path cross-sectional areas during the switching match.

In the second embodiment, the outlet channels 1b, 1c formed while straddling the channels 1b, 1c before and after the change at an arbitrary position in the middle of switching the distribution state in the first embodiment. Are always configured to be constant. That is, the communicating portion 3b of the valve body 3
Is displaced to switch the flow state between the first and second flow paths 1a and 1b and the flow state between the first and third flow paths 1a and 1c at an arbitrary position on the way. The structure is such that the total of the cross-sectional areas of the communication channels formed while straddling the three channels 1b and 1c is always constant.

According to the second embodiment, the second embodiment
As a unique effect of the present invention, not only the same effect as the effect of the first embodiment is exerted, but also in any switching state, the cross-sectional areas of all the flow paths during the switching are the same, so that the switching of the flow path is further reduced. Become smooth.

[0025]

According to the first aspect of the present invention, since the flow is not interrupted by switching the valve device, when a circulating device such as a pump is used, the flow rate is temporarily interrupted by the switching. Since there is no zero state, no load is applied even in continuous operation, and no trouble such as deterioration of life and performance is caused. In addition, there is no need to provide a circulating means such as a pump for two nozzles independently to solve the conventional problems, or to connect two in parallel and use a pump having twice the capacity. There is no problem such as cost increase and cost increase.

According to the second aspect of the present invention, not only the same effect as that of the first aspect of the invention but also the specific effect thereof can be obtained. , The switching of the flow path becomes smoother.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of Embodiment 1 of the present invention.

FIG. 2 is an explanatory perspective view of Embodiment 2 of the present invention.

FIG. 3 is an operation explanatory diagram of Embodiment 2 of the present invention.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body, 1a 1st flow path, 1b 2nd flow path, 1c
Third flow path, 2, 3 valve body, 3a rotating shaft, 3b communicating part.

Claims (2)

[Claims] A main body having at least a first flow path, a second flow path, and a third flow path, and a communication portion communicating between the flow paths being displaced to form the first and second flow paths. A valve body for switching between a flow state between the first and third flow paths, and a flow path formed by the valve body and the main body, in which a communicating portion of the valve body is displaced, and At an arbitrary position on the way of switching between the flow state between the first and second flow paths and the flow state between the first and third flow paths, the main body may span the second and third flow paths. A valve device characterized by comprising. 2. The first and second communication parts of the valve body are displaced.
Each communication flow path formed across the second and third flow paths at an arbitrary position in the middle of switching between the flow state between the flow paths and the flow state between the first and third flow paths 2. The valve device according to claim 1, wherein a total of the communication cross-sectional areas is always constant.