JP3091738B2 - Rotary valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rotary valve,
More specifically, the present invention relates to a rotary valve that can be smoothly opened and closed with a small operation force.

[0002]

2. Description of the Related Art Conventionally, various types of rotary type valves have been proposed. For example, they have been put into practical use by being attached to plumbing equipment of buildings, pipes of a fluid control system in machine tools, vehicles and the like. Ball valves, slide valves, cylindrical valves, and the like are known as such rotary valves.

[0003]

However, in the above-mentioned rotary type valve, a large operating force is required when opening and closing the valve. There is a problem that air is mixed from the air.

The present invention has been made to solve the above-mentioned problems, and in particular, to propose a rotary valve which can smoothly open and close with a small operating force, and can prevent liquid leakage and entry of air from the outside. Make it an issue.

[0005]

According to a first aspect of the present invention, a rotating shaft rotatable from outside is vertically provided in a casing body, and the casing body is provided with a rotating shaft. A liquid inflow chamber is provided in the upper and lower portions, and at least two liquid flow paths communicating with the liquid inflow chamber are formed on the outer peripheral surface of the rotating shaft over the entire length in the vertical direction. A mounting port for a liquid inflow pipe and a mounting port for a liquid discharge pipe communicating with the liquid flow path are formed on a side surface of the casing main body.
The upper part of the supply passage connects the outside and the upper liquid inflow chamber.
A liquid hole is formed and a plug can be removed from this liquid hole
It is characterized by being provided in .

According to a second aspect of the present invention, a rotary shaft is vertically disposed inside the casing body so as to be rotatable from the outside, and a liquid inflow chamber is provided at upper and lower portions inside the casing body. The entire length in the vertical direction of the outer peripheral surface of the rotating shaft
Thus, a liquid flow path communicating with the liquid inflow chamber is formed.
In addition, a liquid flow path penetrating in the lateral direction of the outer peripheral surface is formed, and a mounting port of a liquid inflow pipe and a mounting port of a liquid discharge pipe corresponding to the liquid flow path are formed on a side surface of the casing body. And an upper portion of the casing body
Has a liquid supply hole communicating the outside and the upper liquid inflow chamber.
Formed, and a stopper is detachably provided in the liquid supply hole.
It is characterized by having been done.

[0007]

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

In FIGS. 1 and 3, reference numeral 1 denotes a rotary valve according to the present invention.
Is mainly constituted by a casing main body 2, a rotating shaft 3 housed in the casing main body 2, and a handle 4 mounted on an upper portion of the rotating shaft 3.

The casing body 2 includes a cylindrical member 6 made of tempered glass, a metal shaft case member 7 fitted to a lower portion of the cylindrical member 6, and a metal case fitted to an upper portion of the cylindrical member 6. The upper cover member 8 is formed by a metal lower cover member 9 fitted to the lower part of the shaft case member 7, and the upper cover member 8 and the lower cover member 9 are formed at four corners thereof as shown in FIG. Are connected and fixed via the fixing member 10.
Further, an O-ring 11 for preventing leakage of a liquid is provided at a portion where the respective members are fitted.

The materials of the tubular member 6, the shaft case member 7, the upper lid member 8 and the lower lid member 9 are not limited to those described above, but may be made of other materials.

[0011] Next, the liquid feed hole 14 for the upper cover member 8 for supplying liquid to a vertical direction is formed in the through state, the liquid feed hole 14 is the upper lid member 8 and the shaft case member 7
And a liquid inflow chamber 15 formed in the cylindrical member 6 between the first and second members. A stopper 16 is detachably screwed into the liquid supply hole 14.

The shaft case member 7 is provided with an insertion hole 18 through which the rotating shaft 3 described later is inserted in a vertical direction at the center thereof, and a mounting hole 19 penetrating the insertion hole 18 on the side surface. It is pierced in a cross shape. By the way, depending on the form of use, for example, one of the mounting holes 19 formed in a cross shape has a liquid inflow pipe (not shown) attached thereto, and a liquid discharge pipe (not shown) provided in three outer parts. Mounting,
Alternatively, attach a liquid inflow pipe (not shown) to the two,
There are various cases such as attaching a liquid discharge pipe (not shown) to the outer two.

The mounting opening 19 provided in the shaft case member 7 is not necessarily limited to a cross shape.
As shown in (a), (b), and (c), two, three, and five attachment ports 19 may be provided.

[0014] Next, the liquid inlet chamber 21 is provided between the shaft case member 7 and the lower cover member 9. That is, a concave portion 7 a is provided at a lower portion of the shaft case member 7, and the portion of the concave portion 7 a is formed as the liquid inflow chamber 21. The mounting port 19 formed in the shaft case member 7 and the liquid inflow chamber 21 are linked by a through hole 22 having a different diameter formed in the shaft case member 7 perpendicularly.

A check valve 23 is provided inside the through hole 22, and the check valve 23 is formed by a coil spring 24 and a hard sphere 25 disposed below the coil spring 24. The lower part of the through hole 22 is the hollow screw 2
6 are screwed together and are in close contact with the hard sphere 25. The hard sphere 25 is always urged by the coil spring 24 in the closing direction.

[0016] Next, the rotation shaft 3 is formed by a shaft portion 3a and the valve portion 3b made of metal, the shaft portion 3a is its front portion is outside the through hole 29 provided in the center of the upper lid member 8 The valve portion 3b is inserted in a protruding state and is supported by a bearing 30 via a bearing 30, and the valve portion 3b is inserted into an insertion hole 18 provided in the center of the shaft case member 7 in a vertically penetrating state. A protruding shaft 31 protruding from the center of the bottom of the valve portion 3 b is supported by a recess 32 provided at the center of the lower lid member 9 via a bearing 33. Thereby, the rotating shaft 3 can be housed in the casing body 2.

It is preferable that there is a clearance of 5 to 10 microns between the peripheral surface of the rotating shaft 3 and the peripheral surface of the insertion hole 18 into which the rotating shaft 3 is inserted. Reference numeral 34 denotes the shaft 3
3 shows an oil seal provided around a.

The rotary shaft 3 has the entire outer peripheral surface of the valve portion 3b in the vertical direction.
Over the length, the upper liquid inflow chamber 15 and the lower liquid inflow chamber 2
Four liquid flow paths 36 communicating with 1 are formed at equal intervals ,
These four liquid flow paths 36 correspond to the mounting ports 19 provided in the shaft case member 7. The number of the liquid flow paths 36 provided on the rotating shaft 3 is not necessarily limited to four, and for example, as shown in FIGS. 5 (a), (b), and (c), one, three, and five liquid flow paths are provided. The flow path 36 may be provided.

Next, the rotation shaft 3 is the shaft portion 3 as shown in FIG. 1
with the handle 4 is attached to the top of a, one end of the spring member 38 to the handle 4, which is wound around the shaft portion 3a which is protruded to the upper portion of the upper cover member 8 is in contact, the spring member 38 Is in contact with a bracket member 39 fixed from the rear portion of the upper lid member 8, so that it is always urged to one side. Reference numeral 40 denotes a handle 4
3 shows the stopper member during the operation of FIG.

A handle 4 is provided on the shaft 3a of the rotary shaft 3.
6A, 6B, and 6C, the motor 41, the servo motor 42, and the pulse motor 4
3. A rotary drive source such as a rotary solenoid may be attached. Further, a rotary encoder 44 may be attached together with the servo motor 42 or the pulse motor 43.

Since the rotary valve 1 is configured as described above, in using the same, for example, a liquid inflow pipe (not shown) is attached to two mounting ports 19 provided in the shaft case member 7, and the outside is connected to the outside. With the liquid discharge pipe (not shown) attached to the two attachment ports 19, the rotating shaft 3
The handle 4 attached to the upper part of the shaft part 3a is rotated, and four liquid flow paths 36 provided in the longitudinal direction of the peripheral surface of the valve part 3b of the rotary shaft 3 correspond to the predetermined mounting ports 19. Let it.

Next, two liquid inflow pipe liquid being guided (not shown) (not shown) passes through the two liquid flow paths 36 of the valve portion 3b of two mounting openings 19 in this state The liquid flows into and accumulates in the upper liquid inflow chamber 15, and a part of the liquid flows into and accumulates in the lower liquid inflow chamber 21.

On the other hand, the required amount of liquid collected in the upper portion of the liquid inflow chamber 15 is a pipe for liquid discharge that is attached to two mounting opening 19 outside through the two liquid flow paths 36 of the outer valve portion 3b (Not shown) to a predetermined location.

According to the rotary valve 1 as described above, the valve portion 3b of the rotary shaft 3 is to the liquid,
It is possible to prevent the intake of air from the outside, and it is not necessary to use a sealing material such as an O-ring for preventing leakage of the liquid from the valve portion 3b.

Further, the air mixed into the liquid inflow pipe (not shown) passes through the liquid inflow chamber 15 and is guided to the liquid discharge pipe (not shown). The liquid is naturally guided upward in the pipe 15 and air can be prevented from being mixed into the liquid guided to the liquid discharge pipe.

Furthermore, between the peripheral surface of the rotating shaft 3 of the valve portion 3b of the circumferential surface and the shaft case member 7 insertion hole 18 provided in the inserted of the valve portion 3b has a fine clearance,
Since there is no contact, the valve portion 3b can be smoothly opened and closed with a small operating force.

[0027] Furthermore, different diameters of the through hole and the shaft case member mounting opening 19 bored in the 7 and the bottom of the liquid inlet chamber 21 2
2, and the check valve 23 is provided inside the through hole 22, so that the check valve 23 opens when the inside of the mounting port 19 on the liquid discharge pipe side becomes a negative pressure. As a result, the liquid in the lower liquid inflow chamber 21 is guided and can be prevented.

The rotary valve 1 connects an external storage tank (not shown) to the upper liquid inflow chamber 15, and guides the liquid to the storage tank when the liquid inflow chamber 15 is full. It may be formed as follows.

As shown in FIGS. 4A and 4B, a spacer 37 is interposed between the shaft case member 7 and the valve portion 3b of the rotary shaft 3, and the spacer 37 has a T-shaped cross section corresponding to the mounting opening 19. The through hole 38 may be provided. by this,
A very small flow rate of the liquid can be adjusted with respect to the rotation of the rotating shaft 3.

Next, FIG. 7 shows another example of the rotary valve 1, a cross-shaped fluid flow path 47 The rotary valve 1 is orthogonal to the circumferential surface lateral direction of the valve portion 3b of the rotary shaft 3 is formed The liquid flow path 4 formed in a cross shape
Reference numeral 7 corresponds to four mounting ports 19 provided in the shaft case member 7. Also, the outer peripheral surface of the valve portion 3b of the rotary shaft 3
Liquid inflow chambers 15 provided vertically over the entire length in the vertical direction,
A liquid flow path 47 communicating with 21 is formed.

It should be noted that the number of the liquid flow paths 47 provided in the lateral direction of the peripheral surface of the rotary shaft is not necessarily limited to four, and for example, as shown in FIGS. 8 (a), 8 (b) and 8 (c), ,three,
Five liquid channels 47 may be provided. In this case, it is preferable to provide the shaft case member 7 with an attachment port 19 corresponding to the liquid flow path 47. Further, as shown in FIG. 4D, the rotary shaft 3 may be provided in the circumferential direction and the vertical direction of the circumferential surface of the valve portion 3b.

In this embodiment, the same effect as described above can be obtained. 1 to 6 denote the same parts, and a description thereof will be omitted.

[0033]

As described above, according to the first aspect of the present invention, since the rotary shaft is in a state where the liquid is supplied to the liquid flowing into the upper and lower liquid inflow chambers, the external shaft in this part is formed. It is possible to prevent inhalation of air from the air. In addition, it has been difficult to completely prevent leakage even if a liquid leakage seal material is attached to a movable part, but in the present invention, there is a concern about a seal material such as an O-ring for preventing liquid leakage. Not only can the structure be simplified,
Since there is no friction in the valve section, smooth opening and closing can be performed with a small operating force. Further, air mixed into the liquid on the way can be naturally guided upward in the liquid inflow chamber at the upper part and be extracted. Furthermore, casing
A liquid supply hole in the upper part of the liquid inflow chamber
The supply of the liquid to the apparatus can be easily performed.

Further, according to the second aspect of the present invention, it is possible to obtain the same effect as claim 1.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotary valve according to the present invention.

FIG. 2 is a plan view of the rotary valve.

FIG. 3 is a longitudinal sectional view of the rotary valve.

4A is a longitudinal sectional view of a main part of another example of the shaft case member in the rotary valve shown in FIG. 3, and FIG. 4B is a front view of the main part of FIG.

FIGS. 5A to 5C are explanatory views showing another example of a liquid flow path provided on a rotating shaft and a mounting port provided on a shaft case member.

FIGS. 6A to 6C are explanatory views showing another example in which a handle attached to a shaft portion of a rotating shaft is used.

FIG. 7 is a longitudinal sectional view showing another example of the rotary valve.

8A to 8D are explanatory views showing another example of the liquid flow path provided on the rotating shaft and the mounting port provided on the shaft case member in the rotary valve shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary valve 2 Casing main body 3 Rotating shaft 15, 21 Liquid inflow chamber 19 Mounting port 36 Liquid flow path

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyohiro Hioki 7-25-2-805 Nishikama, Ota-ku, Tokyo (72) Inventor Mitsuyoshi Kaseta 1-1-16-4 Nishi-Kojiya, Ota-ku, Tokyo (72) Inventor Takenaka Masatoshi 1-6-23 Nakarokugo, Ota-ku, Tokyo (56) References JP-A-64-6567 (JP, A) JP-A-61-189379 (JP, A) JP-A-7-331721 (JP, A) 58-22566 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 5/04 F16K 11/00-11/24

Claims (2)

(57) [Claims] 1. A rotating shaft rotatable from the outside is vertically disposed in a casing body, and a liquid inflow chamber is provided in upper and lower portions in the casing body, and an outer peripheral surface of the rotating shaft is provided on an outer peripheral surface of the rotating shaft. At least two liquid flow paths communicating with the liquid inflow chamber are formed over the entire length in the vertical direction , and a mounting port of a liquid inflow pipe communicating with the liquid flow path and a liquid discharge port are formed on a side surface of the casing body. And a mounting port for a piping for the housing, and an upper portion of
A liquid supply hole communicating with the liquid inflow chamber of the portion is formed;
A rotary valve, wherein a stopper is detachably provided in the liquid supply hole . 2. A casing according to claim 1, wherein a rotating shaft is vertically disposed in the casing body so as to be rotatable from the outside, and a liquid inflow chamber is provided in upper and lower portions of the casing body.
In the longitudinal direction of the outer peripheral surface of the
A liquid flow path is formed, and a lateral direction of the outer peripheral surface is formed.
Through to one of the liquid flow path is formed, said on a side surface of the casing and the mounting opening and the attachment port of the liquid discharge pipe of the liquid inflow pipe corresponding to the liquid flow path is formed, or
The upper part of the casing main body has the liquid on the outside and the upper part.
A liquid supply hole communicating with the body inflow chamber is formed, and the liquid supply hole is formed.
A rotary valve, wherein a stopper is detachably provided in the hole .