JPH07145868A - Cylinder type flow passage switching valve - Google Patents

Abstract

PURPOSE:To simplify a piping system by a method wherein switching of a flow passage from a line to a plurality of lines is performed by a single switching valve. CONSTITUTION:A switching valve to switch a plurality of lines for fluid comprises a cylindrical valve box 2 provided in the vicinity of the central part of the bottom of a cylinder body with a spot P1 and on the surface of a cylinder part with entrances P2... for fluid; a cylindrical valve body 1 having a plurality of openings or flow passages in the bottom part of the cylinder body and the surface of a cylinder part; and a rotating means 3 to rotate the valve body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical flow path switching valve capable of switching a plurality of piping flow paths of gas or liquid, that is, fluid with a single switching valve.

[0002]

2. Description of the Related Art In various piping systems, when a flow path changes into a plurality of patterns due to operating conditions, switching of the flow path is performed by, for example, installing a shutoff valve and a check valve for each flow path. It can be performed by sequentially opening and closing each shutoff valve according to a pattern, but various switching valves have been devised because the number of valves installed becomes huge.

FIG. 5 shows what is called an L port type valve.
An L-shaped flow path is provided in a spherical or plug-shaped valve body 51 inside a valve box (casing) 52, and by rotating the valve body 51, three fluid inlets / outlets P ₅₁ , P ₅₂ , P _{53 are provided.}
Is turned on or off. For example, in the state of this figure, P ₅₁ is closed and P ₅₂ and P ₅₃ are in conduction.

Further, FIG. 6 shows a so-called rotary valve.
The valve body 61 in the box 62 has two independent through holes at right angles.
Is provided, for example, in the state of (a) in this figure
Is P ₆₁And P₆₃, P₆₂And P₆₄Because there is continuity,
For example, P₆₁And P₆₂To the fluid cylinder, P₆₃Pressure source, P
₆₄When connected to the return tank respectively, pressure source → P₆₃→ P₆₁→ Fluid cylinder → P₆₂→ P₆₄→ Return
The flow path of the tank is formed.

However, as shown in (b), the valve body 61 is rotated about 45 °.
When it is rotated, P ₆₁ and P ₆₄ , P ₆₂ and P ₆₃ become conductive, and the flow path of pressure source → P ₆₃ → P ₆₂ → fluid cylinder → P ₆₁ → P ₆₄ → return tank is switched, and the fluid cylinder is reversed. Work in the direction. Even if such a simple switching of the flow path is required to realize only with the shut-off valve and the check valve, four units are required respectively, and it is necessary to install so many actuators for operating the valves. Then, the function can be achieved with only one unit.

Such a switching valve is extremely effective in simplifying the pipeline, but since the fluid inlets and outlets are in one-to-one correspondence, they are switched to, for example, a 1: n channel. A large number of switching valves are also necessary in such a pipeline, and in order to automatically switch these multiple flow paths according to a specific pattern, a control device such as a programmable controller or a sequencer is used, which requires a large installation space and cost. I need.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to realize switching of a plurality of flow paths with a single switching valve, and to greatly simplify piping equipment and control equipment.

[0008]

A cylindrical flow path switching valve of the present invention is a switching valve for switching a plurality of fluid flow paths,
A cylindrical valve box having a fluid inlet and outlet at one location near the center of the bottom of the cylindrical body and at a plurality of locations on the surface of the cylindrical section, and having a plurality of openings or channels in the bottom of the cylindrical body and the surface of the cylindrical section inscribed therein. It is characterized by comprising a cylindrical valve body and a rotating means for rotating the valve body. Desirably, a plurality of cylindrical valve bodies are provided on the cylindrical surface of the valve box at equal intervals on the circumference of the same cross section with respect to the central axis of the cylindrical body. There is a fluid inlet / outlet at the location,
The valve body is provided with a cylindrical surface position corresponding to a fluid inlet / outlet provided on the cylindrical surface of the valve box, and two of these inlet / outlet ports are provided.
Provide a slit-shaped opening with a length that opens at the same time,
Alternatively, the cylindrical surface of the valve box is provided with a plurality of fluid inlets and outlets at equal intervals on the circumference of a plurality of cross sections with respect to the central axis of the cylindrical body, and the valve body is provided with a fluid inlet and outlet for the valve box. On the surface of the cylinder at a plurality of cross-sections where is provided, openings are provided, each of which is out of phase and which is electrically connected to the opening to the bottom of the cylinder.

[0009]

[Operation] According to the present invention, the fluid outlets (or inlets) provided at a plurality of locations on the cylindrical surface of the cylindrical body are rotated by rotating the valve body with respect to one fluid inlet (or outlet) provided at the bottom of the cylindrical body. Since the connection destination is sequentially switched to (1), a plurality of flow paths can be switched by one switching valve.

[0010]

【Example】

First Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 is a sectional view of the switching valve as seen from the front, and FIG. 2 is its AA.
FIG. 1 is a cross-sectional view taken along the arrow, where 1 is a valve body, 2 is a valve box, 3 is a rotary shaft, 4 and 5 are side plates, and P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ are fluid inlets and outlets, respectively. .

Each of the valve boxes 2 has a cylindrical shape, and both ends of the valve box 2 are closed by side plates 4 and 5, and a similarly cylindrical valve body 1 inscribed therein has a rotary shaft 3 penetrating the side plate 5. By turning, it can be rotated while sliding on the inner surface of the valve box 2. The side plate 4 corresponding to the bottom of the valve box 2 is provided with a fluid inlet / outlet port P ₁ , and the surface of the cylindrical portion is provided with four fluid inlet / outlet ports P circumferentially, for example, at 90 ° intervals as shown in FIG.
₂ , P ₃ , P ₄ , and P ₅ are provided. On the other hand, the valve body 1
Makes the bottom of the valve box 2 facing the side plate 4 open, and at the cylindrical surface positions corresponding to the fluid inlets / outlets P ₂ , P ₃ , P ₄ , P ₅ of the valve box 2, these outlets 2 A slit 1A with a central angle of about 90 ° is cut so that the slits can be opened at the same time.

With this structure, the fluid inlet / outlet port P₁
Is always connected to the inside of the valve body 1, but the fluid inlet / outlet P
₂, P₃, P_Four, P_FiveDepends on the state of the valve body 1
It may or may not conduct electricity to the inside. For example, the valve body
When 1 is in the state of FIG. 2 (a), the fluid inlet / outlet port P₂
Only the inside of the valve body 1, that is, the fluid inlet / outlet port P₁Continuity with
And other P₃, P_Four, P _FiveIs blocked. One
2 (b) by rotating the valve body 1 about 45 ° in the direction of the arrow.
In this state, the slit 1A has a fluid inlet / outlet port P.₂, P₃
Since it comes to a position that spans both,₁Is P₂,
P₃Conduct with both.

Therefore, for example, if the fluid inlet / outlet P ₁ is connected to a pressure source and P ₂ , P ₃ , P ₄ , and P ₅ are connected to a fluid device, respectively, and the valve body 1 is rotated in the direction of the arrow. , P ₁ → P ₂ P ₁ → P ₂ , P ₃ P ₁ → P ₃ P ₁ → P ₃ , P _4, ...

Further, the slit 1A is not of a uniform width but has a double spindle shape in which the width gradually decreases toward both ends, and the rotation angle of the valve element 1 can be continuously controlled in phase and speed. For example, since the effective opening area changes depending on the degree of overlap between the inlet and outlet of each fluid and the slit 1A, the flow rate can be adjusted by this switching valve. The valve body 1 can be rotated by connecting the rotary shaft 3 to a rotary actuator such as a deceleration motor or a pulse motor, but it is desirable to further extend the rotary shaft 3 so that it can be manually operated.

Second Embodiment A second embodiment of the present invention will be described with reference to FIGS.
11 is a valve body, 12 is a valve box, 13 is a rotary shaft, R ₁ , R ₂ ... R
_Reference numeral ₁₃ is a fluid inlet / outlet. The valve body 11 and the valve box 12 each have a cylindrical shape with a lid, and the valve body 11 is inscribed in the valve box 12 and the rotary shaft 13 passing through the right end portion of the valve box 12 is rotated, whereby the inner surface of the valve box 12 is rotated. It can be rotated while sliding. A fluid inlet / outlet R ₁₃ is provided at the left end of the valve box 12, and the valve box 12 has four circumferential positions on three cross sections at substantially equal intervals in the axial direction, for example, 90 points as shown in FIG. Fluid inlets / outlets R ₁ , R ₄ , R ₇ , R _10, ... Are provided at intervals of °. On the other hand, on the cylindrical surface of the valve body 11 at three positions corresponding to the inlet and outlet of the fluid of the valve box 12, there are provided circumferential openings V ₁ , V ₂ and V ₃ , respectively. , Opening V ₁ , V
The phases of ₂ and V ₃ are shifted by 30 °.

Further, an opening V ₄ is provided at the left end portion of the valve body 11 at a position corresponding to the inlet / outlet port R ₁₃ of the valve box 12, and each opening V ₄ is provided.
_{1, V 2, V 3,} V 4 are in conduction with each other connected by connecting pipe 16, connecting pipe 16 is not necessarily required, to each opening has only to lead to the inside of the valve body 11, The valve body 11 may not have a hollow structure, but may have a solid structure except for the connecting pipe 16.

With this configuration, the fluid inlet / outlet port R ₁₃
Is always connected to the inside of the valve body 11, but the fluid inlet / outlet R
.. ₁ , R ₂ , R ₃ , R _4, ... May or may not be sequentially connected to the inlet / outlet R ₁₃ as the valve body 11 rotates. Now
In the state of FIG. 3, the opening V _{1 of the} valve body 11 and the fluid inlet / outlet R ₁ of the valve box 12 coincide with each other and are connected to the inlet / outlet R ₁₃ through the connecting pipe 16, but the valve body 11 rotates 30 ° in the direction of the arrow. Then the opening V
₁ is closed, and instead the opening V ₂ coincides with the entrance R ₂ . In this way, every 30 ° rotation, the entrance R ₁ ,
_{R 2, R 3, R 4} ··· are turned on sequentially doorway R _13.

[0018] For example, when the gas to be subjected to analysis and had twelve, connect each of the sample line entrance _{R 1, R 2, R 3} , the R ₄ · · ·, entrance R ₁₃
If the valve is connected to an analytical instrument such as a gas chromatograph,
Analysis can be performed by sequentially switching the gas while rotating 11. When switching is repeated periodically in a fixed pattern, it is sufficient to simply rotate the valve pair 11 in a fixed direction.However, in the case of a complicated pattern, the rotation angle is controlled to a set value or reverse rotation is performed. This can be realized by combining controls that cause the above.

When there are more than 12 types of switching pipes,
By further extending this structure, each opening V ₁ , V _{2 of} the valve body 11,
The central angle of the V ₃ ··· may be Shiteyare narrower than 30 °. In addition, in the above-mentioned embodiment, since the space between the valve boxes 2 and 12 and the valve bodies 1 and 11 is a cylindrical surface, it is possible to perform precision machining.
If you don't like leaks, lining with copper alloy or fluorocarbon resin is recommended.

In this embodiment, the inlet and outlet of the fluid on the valve box 12 side, for example, R ₁ , R ₂ and R ₃ are arranged on a straight line with the phases aligned. The phases of the openings V ₁ , V ₂ , and V ₃ of 11 may be matched.

[0021]

The switching valve of the present invention has an extremely simple structure, and as shown in each embodiment, a plurality of flow paths, that is, one switching valve for switching one to one instead of one to one. In addition, since switching can be achieved by simple control of only the rotation angle, the control equipment is simple, and the piping system configuration is slim, which reduces equipment costs and maintenance costs. effective.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view taken along the line AA of FIG.

FIG. 3 is a front sectional view showing a second embodiment of the present invention.

FIG. 4 is a side sectional view taken along the line BB of FIG.

FIG. 5 is a cross-sectional view showing a conventional technique.

FIG. 6 is a cross-sectional view showing another conventional technique.

[Explanation of symbols]

 1, 11, 51, 61 Valve body 1A Slit 2, 12, 52, 62 Valve box 3, 13 Rotating shaft 4, 5 Side plate 16 Connecting pipe P, R Fluid inlet / outlet V Opening

Claims (4)

[Claims] 1. A switching valve for switching a plurality of fluid passages, wherein the fluid inlet / outlet (P ₂ , P ₁₃ ) is provided at one location (P ₁ , R ₁₃ ) near the center of the bottom of the cylinder and at a plurality of locations on the surface of the cylinder (P ₂ , P ₁₃ ).
₃ ..., R ₁ , R ₂ ...) provided with a cylindrical valve box (2, 12) and a plurality of openings (V ₁ , V ₁ ) inscribed therein and at the bottom of the cylinder and the surface of the cylinder. ₂ , V ₃ ) or a cylindrical valve body (1, 11) having a slit-shaped opening (1A),
A cylindrical flow path switching valve, comprising: rotating means (3, 13) for rotating the valve body. 2. The cylindrical surface of the valve box (2) is provided with a plurality of fluid inlets and outlets (P ₂ , P ₃ ...) At equal intervals on the circumference of the same cross section with respect to the central axis of the cylindrical body. Also, the valve body (1) has slit-shaped opening portions having lengths that simultaneously open at two locations of these inlets and outlets at cylindrical surface positions corresponding to inlets and outlets of fluid provided on the cylindrical surface of the valve box. (1A)
The cylindrical flow path switching valve according to claim 1, further comprising: 3. The cylindrical channel according to claim 2, wherein the slit-shaped opening (1A) provided in the valve body (1) has a double spindle shape whose width gradually decreases toward both ends. Switching valve. 4. The cylindrical surface of the valve box (12) is provided with a plurality of fluid inlets / outlets (R ₁ , R ₂ ...) At equal intervals on the circumference of a plurality of cross sections with respect to the central axis of the cylindrical body. Further, the valve body (11) has openings (V ₁₎ to the bottom of the cylinder body, one at each phase-shifted position on the cylinder surface at a plurality of cross-sectional positions where fluid inlets and outlets are provided in the valve box. , V ₂ ,
The cylindrical flow path switching valve according to claim 1, further comprising an opening (V ₄ ) which is electrically connected to V ₃ ).