JP3131810B2 - Switching valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve having a function of switching a flow direction of a fluid and adjusting a flow rate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, a switching valve for switching a flow direction of a fluid has a valve body 51 having two-way water inlets 51a and 51b formed in an L-shape and a T-shape. The valve case 52 is provided with openings 52a, 52b, 52c in three directions. The valve case 52 accommodates the valve element 51 rotatably in the horizontal direction. The valve body 51 is connected to the valve shaft 53 and the valve shaft 5
By operating the lever 54 attached to the shutter 3, it rotates.

[0003] As shown in FIG.
a and the opening 52c are in communication with each other through the water holes 51a and 51b, and the fluid flows from the opening 52a to the opening 52c.
Alternatively, it flows from the mouth 52c to the opening 52a. Here, when the valve element 51 is rotated by 90 ° to the right, the opening 52b communicates with the opening 52c via the water passages 51b and 51a, and fluid flows from the opening 52b to the opening 52c or the opening 52c.
c to the opening 52b. Thus, by rotating the valve element 51, the opening of the valve box 52 is switched to switch the flow direction of the fluid.

[0004]

However, according to the above prior art, there are the following problems. The flow of the fluid can be switched in two directions from the opening 52c to the opening 52a and from the opening 52c to the opening 52b.
a or the flow direction of the fluid flowing from the opening 52b cannot be switched.

[0005] Further, since the flow rate cannot be adjusted, it may be necessary to provide a flow rate adjusting valve before and after the switching valve.
Therefore, the space for mounting the valve is increased, and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a switching valve capable of switching a fluid flow in multiple directions and adjusting a flow rate.

[0007]

In order to solve the above-mentioned problems, the present invention forms a T-shaped flow path and has openings in three directions.
Provided at the intersection of the valve box and the flow path of the valve box.
T-shaped so that it can be opposed to each opening in three directions
And a valve body formed with a three-way water inlet in the vertical direction.
And a rotation mechanism for rotating in the horizontal direction,
By rotating the valve vertically or horizontally,
And at least two of the three-way openings of the valve box are opened.
Make sure that the mouths can communicate with each other, or
A switching valve whose ports are not communicated with each other is configured. Further, the rotation mechanism includes a valve shaft for rotating the valve body, and a clutch for detachably connecting the valve shaft and the valve body, and it is preferable that the clutch be provided at at least one of water passages of the valve body. . And a lifting mechanism for attaching and detaching the valve shaft to and from the valve body may be provided, wherein the valve shaft rotates the valve body in a horizontal direction,
Preferably, the valve body comprises a vertical valve shaft that rotates the valve body in a vertical direction.

[0008]

According to the present invention, when rotating the valve body in the vertical direction or the horizontal direction, will be switched open and the opening of the valve box which communicates with the switching, the flow direction of the fluid can Setsu換Ru
In both cases, all openings can be non-communicating with each other.
Since the water inlet of the valve element is formed in three T-shaped directions, the flow of the linear fluid can be switched to the curved flow, and the flow can be switched in multiple directions. Further, the flow rate can be adjusted by the rotation angle of the valve body.

In a motor having a vertical valve shaft and a horizontal valve shaft, when one clutch of the vertical valve shaft and the horizontal valve shaft is connected, the other clutch is disengaged. Further, in a device provided with an elevating mechanism, the connection and disengagement of the clutch are performed by the elevating mechanism.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
1 is a cross-sectional plan view of the switching valve, FIG. 2 is a front cross-sectional view of the switching valve, FIG. 3 is a side cross-sectional view of the switching valve, and FIG. FIG. 5 is a plan sectional view and a front sectional view of the switching valve showing a flow form to the branch pipe, and FIG. 6 is a plan sectional view and a front sectional view of the switching valve showing a flow form of the additional function.

As shown in FIGS. 1 to 3, the switching valve A is
A valve body 1 having three-way water inlets 1A, 1B, 1C formed in a T-shape, a valve box 2 having openings T 2, 2B, 2C in a T-shape, and a valve body 1 in the valve box 2 Rotate in the vertical or horizontal direction to switch the flow direction of the fluid,
And a rotation mechanism B for adjusting the flow rate.

The valve body 1 has a substantially spherical shape, and the water inlets 1A, 1B,
A T-shaped flow path communicating with 1C is formed.
It is housed inside so as to be rotatable horizontally and vertically. The valve box 2 has a cross shape and forms a T-shaped flow path communicating with the openings 2A, 2B, 2C, and the valve body 1 is disposed at the center.

The rotation mechanism B comprises a vertical valve shaft 3 for rotating the valve 1 in the vertical direction and a horizontal valve shaft 4 for rotating the valve 1 in the horizontal direction.
And clutches 3a and 3b for detachably connecting the vertical valve shaft 3 and the valve element 1, and clutches 4a and 4b for detachably connecting the horizontal valve axis 4 and the valve element 1. An elevating mechanism 7 for attaching and detaching the speed reducer 5 and the vertical valve shaft 3 to and from the valve body 1 is provided. An elevating mechanism 8 for attaching and detaching the speed reducer 6 and the horizontal valve shaft 4 to and from the valve body 1 is provided on the horizontal valve shaft 4. Further, the vertical valve shaft 3 is disposed on the opposite side of the opening 2C of the valve box 2, and the horizontal valve shaft is disposed on the upper side of the valve box 2.

The clutches 3a and 3b are meshing clutches. One clutch 3a is provided at the tip of the vertical valve shaft 3, and the other clutch 3b is provided at the water inlet 1A of the valve body 1. The clutches 4a and 4b are square-shaped uneven clutches.
A convex clutch 4a is provided at the tip of the horizontal valve shaft 4, and a concave clutch 4b is formed on the spherical surface of the valve body 1 on the side opposite to the water inlet 1C.

The speed reducer 5 comprises a worm gear 9 connected to a drive source (not shown) (rotary handle or motor) and a worm wheel 10 meshing with the worm gear 9. The vertical valve shaft 3 is slidably inserted into the worm wheel 10. I have. The vertical valve shaft 3 is provided with a key 11. When the vertical valve shaft 3 is lowered (in FIG. 1), the key 11 of the vertical valve shaft 3 is fitted into a keyway (not shown) formed in the worm wheel 10. The power of the worm wheel 10 is transmitted to the vertical valve shaft 3. The speed reducer 6 has the same configuration as the speed reducer 5 described above.

The elevating mechanism 7 comprises a long screw 12 provided at the base end of the vertical valve shaft 3, a female screw block 13 screwed with the long screw 12, and a bearing 14 for rotatably supporting the female screw block 13. When the female screw block 13 is rotated, the long male screw 12 moves, and the vertical valve shaft 3 moves up and down (in FIG. 1) accordingly. The elevating mechanism 8 is configured similarly to the elevating mechanism 7 described above.

Next, the operation and action of the switching valve A and the rotation mechanism B will be described. First, the raising / lowering mechanism 8 is operated to lower the horizontal valve shaft 4 (in FIG. 2), the clutches 4a and 4b are fitted, and the horizontal valve shaft 4 and the valve body 1 are connected. At this time, the vertical valve shaft 3 is raised (in FIG. 1) by the lifting mechanism 7, and the clutches 3a and 3b are disconnected. In this state, when the horizontal valve shaft 4 is rotated by the drive source (not shown) via the speed reducer 6, the valve body 1 rotates in the horizontal direction as shown in FIG.

In FIGS. 4A and 4B, a-a and b are a plan view and a front sectional view, respectively, in a fully opened state, and the main flow through the water-flow opening 1A of the valve box 2 connecting the water-flow opening 1A of the valve body 1 to the main flow pipe. This is a state in which the opening 2B side connected to the pipe and the water inlet 1C are located on the bottom side of the valve box 2. A closing plate is attached to the opening 2C of the valve box 2 connected to the branch pipe. FIGS. 4A and 4B are a plan view and a front sectional view in an intermediate open state, and the flow rate is adjusted by the rotation angle of the valve body 1. FIGS. 3a and 3b are a plan view and a front sectional view, respectively, in a fully closed state.
In this state, the water inlet 1B is located on the opening 2C side, and the water inlet 1C is located on the bottom side of the valve box 2. This is a state in which the valve body 1 has been rotated 90 ° clockwise from the states of a-a and b. In this way, opening / closing to the main flow pipe side and flow rate adjustment are performed.

Next, in the state of a-a and b in FIG. 4, the elevating mechanism 7 is operated to lower the vertical valve shaft 3, and the clutch 3a,
3b and the vertical valve shaft 3 and the valve element 1 are connected. Further, the horizontal valve shaft 4 is raised by the lifting mechanism 8, and the clutches 4a and 4b are disconnected. In this state, when the vertical valve shaft 3 is rotated by the drive source (not shown) via the speed reducer 5, FIG.
As shown in (2), the valve element 1 rotates in the vertical direction.

In FIG. 5, d-c and d are a plan view and a front sectional view, respectively, in the fully closed state. The water inlet 1A of the valve body 1 is on the side of the vertical valve shaft 3, the water outlet 1B is on the side of the opening 2C, and the water outlet 1C. Is located on the bottom side of the valve box 2. The closing plate attached to the opening 2C of the valve box 2 is removed. E-c and d are a plan view and a front sectional view in an intermediate open state, and the flow rate is adjusted by the rotation angle of the valve body 1. FIGS. 1C and 1D are a plan view and a front sectional view, respectively, of the valve body 1 in the fully opened state. It is a state where it was located at. This is a state in which the valve body 1 is rotated rightward by 90 ° from the states of d-c and d. In this way, the opening / closing to the branch pipe side and the flow rate adjustment are performed.

When the fitting groove for fitting the clutch 4a of the horizontal valve shaft 4 is formed in the valve body 1 in the state of FIGS. 5C and 5D, the state shown in FIG. it can. Also in this case, the horizontal valve shaft 4 is lowered by operating the elevating mechanism 8, the fitting grooves formed in the clutch 4 a and the valve body 1 are fitted, and the horizontal valve shaft 4 and the valve body 1 are connected. At this time, the vertical valve shaft 3 is raised by the lifting mechanism 7, and the clutches 3a and 3b are disconnected. In this state, the worm wheel 1 of the speed reducer 6
When the horizontal valve shaft 4 is rotated via a speed reducer 6 by a driving source (not shown),
As shown in FIG. 6, the valve element 1 rotates in the horizontal direction.

In FIGS. 6A and 6B, toe and f are a plan view and a front sectional view in a fully opened state from the main flow pipe to the branch pipe, in which the water inlet 1A of the valve body 1 is opened on the vertical valve shaft 3 side, and the water inlet 1B is opened. 2C
Side, the water inlet 1C is located on the side of the opening 2B of the valve box 2. FIGS. 3E and 3F are a plan view and a front sectional view, respectively, showing a fully opened state from the main flow pipe to the main flow pipe. This is a state where it is located on the shaft 3 side. Lies e and f are a plan view and a front cross-sectional view of the fully opened state from both main flow pipes to the branch pipe or from the main flow pipe to the main flow pipe and the branch pipe. This is a state in which the 2A side and the water passage 1C are located on the opening 2C side. this is,
This is a state in which the valve body 1 is rotated 90 ° to the left and 90 ° to the right from the states of toe and f. In this way, the main flow pipe and the branch pipe can be opened and closed, and the same operation as the switching valve shown in the conventional example can be performed.

As described above, by rotating the valve body 1 in the vertical and horizontal directions, the combination of the opening of the valve box 2 and the water passage of the valve body 1 can be changed. The direction of flow of incoming fluid can also be switched. Also, since the flow rate can be adjusted by the rotation angle of the valve body, there is no need to combine with a flow rate adjusting valve unlike a conventional switching valve, so it is economical and the space required for the valve can be made compact. it can.

[0024]

As described above, the present invention has the following advantages. A T-shaped valve body having three-way water inlets can be rotated vertically and horizontally, so that incoming fluid can be switched from any direction . All openings are not in communication with each other
That is, the opening of the valve box can be fully closed. Since the flow rate can be adjusted by the rotation angle of the valve element, there is no need to provide a flow rate adjustment valve before and after the switching valve. Therefore, the space for mounting the valve is reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a switching valve according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the switching valve according to the embodiment of the present invention.

FIG. 3 is a side sectional view of the switching valve according to the embodiment of the present invention.

FIG. 4 is a plan cross-sectional view and a front cross-sectional view of a switching valve showing a flow form toward a main pipe according to an embodiment of the present invention.

FIG. 5 is a plan sectional view and a front sectional view of a switching valve showing a flow form to a branch pipe according to the example of the present invention.

FIG. 6 is a plan sectional view and a front sectional view of a switching valve showing a flow form of an additional function according to the embodiment of the present invention.

FIG. 7 is a plan sectional view of a conventional example.

FIG. 8 is a front sectional view of a conventional example.

[Explanation of symbols]

 A: Switching valve B: Rotating mechanism 1: Valve 1A, 1B, 1C: Water inlet 2: Valve box 2A, 2B, 2C: Opening 3: Vertical valve shaft 3a, 3b: Clutch 4: Horizontal valve shaft 4a, 4b: Clutch 5,6: Reduction gear 7,8: Elevating mechanism 9: Worm gear 10: Worm wheel 11: Key 12: Long male screw 13: Female screw block 14: Bearing

Claims (4)

(57) [Claims] 1. A T-shaped flow path is formed and opened in three directions.
And a valve box provided at the intersection of the flow paths of the valve box, and a three-way opening of the valve box
Three-way through the T-shape so that they can face each other.
A valve body having a water port, and a rotation mechanism for rotating the valve body in vertical and horizontal directions
And rotating the valve body in a vertical direction or a horizontal direction.
Thereby, at least two of the three-way openings of the valve box
So that the openings can communicate with each other, or all
A switching valve , wherein the openings are not connected to each other . Wherein said rotating mechanism is composed of a valve shaft for rotating the valve body, and a clutch for detachably connecting the valve shaft and the valve body, provided the clutch in at least one position of the passage of the valve body Mizuguchi The switching valve according to claim 1 , wherein 3. The switching valve according to claim 2 , further comprising an elevating mechanism for attaching and detaching the valve shaft to and from a valve body. Wherein said valve shaft has a horizontal valve shaft rotating the valve body in a horizontal direction, to claim 2 or claim 3, characterized in that it consists of a vertical valve shaft rotating the valve body in a vertical direction switching valve described.