JP2796707B2 - Control 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 control valve for controlling or shutting off a flow rate of a fluid, and more particularly to a valve opening / closing structure.

[0002]

2. Description of the Related Art Conventionally, a ball valve having a through hole penetrating through the center of a so-called spherical valve element is known as a control valve for controlling or shutting off the flow rate of a fluid.

On the other hand, the flat plug 1 previously submitted by the present applicant has
00 (Japanese Patent Application No. 6-90860), as shown in FIG. 10, uses a link mechanism 102 to vertically move an operating rod 101 supported by a valve body 105 via a seal member 106 to a flat valve 103. The plate-like valve 103 is rotated around a support shaft 107 fixed to the valve body 105 to approach the valve seat 104, and is pressed or separated.

[0004]

However, in the above ball valve, since the spherical valve element is pressed by the pair of seal members, the operating torque of the operating rod for rotating the valve element is large,
In addition, the use of a spherical valve may increase the width of the valve, and may make installation difficult in a narrow mounting location. Further, the ball valve has a problem that it has a large number of parts, is relatively difficult to assemble, and is expensive.

On the other hand, in the flat plug 100, the operating rod 101 is moved up and down by the link mechanism 102 so that the flat valve element 103 is brought close to or pressed against the valve seat 104. And link mechanism 1
In view of the strength of No. 02 and the structure of pressing the valve element 103 against the valve seat 104, there is a possibility that the reliability and reliability of opening and closing the valve may be lacking. Further, the size of the valve in the up-down direction is increased, and there is a fear that the installation may be difficult in a vertically narrow mounting place like the ball valve. In addition, since the valve is opened and closed by moving the operation rod 101 up and down, there is a risk that intuitive determination of opening and closing is difficult to visually recognize.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control valve for controlling or shutting off the flow rate of a fluid, which is easy to open and close, has high reliability and reliability of opening and closing, and is compact, simple in structure and economical. It is to provide.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a valve seat and a valve which cooperate with each other to regulate or shut off the flow rate of a fluid, and a valve seat and a valve inside the valve seat and the valve. A control valve having an operating rod for bringing the valve element rotatably supported on a support shaft provided on a valve body to be held close to the valve seat, and pressing or separating the valve element, wherein a back surface of the valve element is provided. An L-shaped member fixed to one end side and rotatable coaxially with the support shaft together with the valve element; provided along an outer periphery of one end of the operation rod; A guide rail for guiding the inside of the member to rotate the valve about the support shaft.

[0008] An L-shaped member fixed to a valve element rotatable coaxially with a support shaft of the valve element, and a guide rail provided along the outer periphery of one end of the operation rod are provided with an operation rod. By rotating, the inside of the two pieces of the L-shaped member is guided to rotate the valve around the support shaft, so that the opening and closing of the control valve is easy, and the opening and closing of the control valve is reliable and reliable. The structure is simple and economical.

Further, in the control valve, a tightening piece for pressing a back surface of the valve element to tighten the valve element to the valve seat is provided at one end of the operation rod. When the operation rod is provided with a tightening piece at one end of the operation rod for pressing the back surface of the valve element to tighten the valve element to the valve seat, the control valve can be fully closed more reliably.

[0010] Further, in any of the above-mentioned control valves, there is provided a rotation restricting means for restricting the rotation of the operation rod between the fully closed state and the fully opened state of the control valve. The one provided with the rotation restricting means for restricting the rotation of the operation rod between the fully closed state and the fully opened state of the control valve ensures that the operation rod is rotated between the fully closed state and the fully opened state of the control valve. regulate.

The rotation restricting means includes an annular groove provided in a circumferential direction of the side surface of the operation rod and having a predetermined arc length, loosely fitted into the annular groove and fixed to the valve body.
It has a sliding piece for restricting the rotation of the operation rod and preventing the operation rod from coming off. The rotation restricting means, which has an annular groove provided in the circumferential direction of the side surface of the operation rod and a sliding piece fixed to the valve body and for restricting rotation of the operation rod and preventing the operation rod from coming off, rotates the operation rod. By the movement, the sliding piece and the annular groove rotate relatively by a predetermined angle, and play both roles of restricting the rotation of the operation rod and preventing the operation rod from falling off with a simple structure.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the control valve according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a vertical sectional view of a control valve according to an embodiment of the present invention in a fully closed state, and FIG. 2 is a vertical sectional view of the control valve of the embodiment of FIG. 1 in a fully open state. . The control valve 1 of the present embodiment has a valve seat 6 and a valve 8 that cooperate with each other to adjust or shut off the flow rate of fluid, and a valve body that holds the valve seat 6 and the valve 8 inside. An operation rod 17 for bringing a valve element 8 rotatably supported by a pin 3 serving as a support shaft provided in the apparatus 2 close to the valve seat 6 to press or separate from the valve seat 6.

Further, the valve body 2 has a so-called cheese (T-shaped) shape, and an inlet nozzle 30 is inserted into the first opening 29, and the second opening 31 is coaxial with the first opening 29. An outlet nozzle 32 is inserted. The step 5 is formed in the first opening 29 and the second opening 31 of the valve body 2, and the valve seat 6 held by the holding frame 7 is formed in the step 5 of the second opening 31. Fixed. The valve element 8 is made of a flat plate-shaped metal or other rigid material, and a sealing elastic material such as rubber or Teflon is fixed to the surface facing the valve seat 2 by baking adhesion or other means. . The elastic material having the sealing property may be provided on the valve seat 6 side instead of being provided on the valve element 8 side.

Further, the control valve 1 of the present embodiment has a third opening 33 in a direction perpendicular to the first opening 29 and the second opening 31, and the third opening 33 The operation rod 17 is rotatably fitted to the control rod 17. An O-ring groove 22 is formed on a side surface of the operation rod 17, and an O-ring 34 is fitted therein to seal a fluid. A flange 17b is provided adjacent to the handle locking portion 17a at the upper part of the operation rod 17, and an O-ring groove 2 is formed on the lower surface thereof.
3 is formed, an O-ring 35 is fitted, and an O-ring 34
Together with the fluid.

Further, the control valve 1 of the present embodiment is provided with a valve 8
Pin 3 together with the valve 8
L-shaped member 11 rotatable coaxially with respect to operation rod 1
A guide rail 19 is provided along the outer periphery of one end 18 of the 7, and guides the inside 12 of the L-shaped member 11 by rotating the operation rod 17 to rotate the valve 8 around the pin 3. The operation rod 17 has a tightening piece 21 at one end 18 of the operation rod 17 for pressing the back surface 9 of the valve element 8 to tighten the valve element 8 to the valve seat 6.

FIG. 3 is a perspective view of the operating rod 17 used in the control valve 1 of the embodiment shown in FIG. The operation rod 17 has the guide rail 19 at one end 18 and has a curved line 19.
a is a part (arc) of a circle forming one end side of the operation rod 17. The surface forming the guide rail 19 is a three-dimensional curved surface,
Now, assuming that the operation rod 17 is vertically positioned as shown in FIG. 3, the curved surface portion 19b is a horizontal curved surface
c is a vertical curved surface, and curved surface portion 19 d is curved surface portion 19.
The curved surface perpendicular to b, the curved surface portion 19e is a curved surface portion 19e.
This is a horizontal curved surface that is perpendicular to c and is located on the bottom surface of the operation rod 17. By rotating the operating rod 17, the L-shaped member 1 is moved along the arc curve 19 a of the guide rail 19.
The two intersecting portions 12a of the two pieces relatively move. The curved surface portion 19f is a vertical curved surface and finally matches the curved surface portion 19c.

Further, the operating rod 17 has a tightening piece 21 adjacent to the guide rail 19. The tightening piece 21 elastically presses the back surface 9 of the valve element 8 at the fully closed position of the control valve 1 in FIG. 1, so that the valve element 8 is in close contact with and pressure contact with the valve seat 6. In the present embodiment, the re-tightening piece 21 is
Although it is formed integrally with the above, it may be formed as a separate body and fixed by screws or other fixing means.

FIG. 4 shows a control valve 1 according to the embodiment of FIGS.
FIG. 5 is a perspective view of an L-shaped member 11 which also serves as a hinge used in the first embodiment. The two pieces 11a and 11b of the L-shaped member 11 are formed so as to intersect at right angles, and the inside thereof slides along the guide rail 19 and relatively moves. Furthermore, one piece 1 of the L-shaped member 11
1b forms one of the hinges, and is fixed to the valve element 8 with small screws via two holes 11c. A hinge piece 14, which is the other of the hinges, is rotatably connected to one piece 11 b of the L-shaped member 11 via the pin 3 and has two holes 14 a in the valve body 2.
Is fixed with small screws. The pin 3 functions as a support shaft when fixed to the valve body 2.

FIG. 5 is a sectional view taken along the line II of FIG. The operating rod 17 is provided with a groove 26
a, 26b, 26c and ribs 27a, 27b, 27c, and the valve body 2 is inserted into the ribbed grooves 26a, 26b, 26c.
Retaining members 25a, 25b, 25 for preventing the operation rod from retaining through holes 2a, 2b, 2c formed in the side surfaces of
c is inserted. In the present embodiment, the control valve 1 is fully closed, that is, the operation rod 17 and the valve body 2 shown in FIG.
The angle α between the straight line 24a passing through the center 17c of the operating rod 17 and the straight line 24b passing through the center 17c of the operating rod 17 is 90 degrees. And
A groove 26a with a rib of the operating rod 17, a retaining member 25a loosely fitted in the groove 26a, and ribs 27a and 2a serving as stoppers.
7b form a rotation restricting means for restricting the rotation of the operation rod 17.

FIGS. 6 to 8 are views for explaining the operation of the control valve 1 according to the embodiment of FIGS. 1 and 2. In each of these figures, (A) is a partially omitted longitudinal sectional view, and (B) is (A). Of each II-II line, III-II
FIG. 4 is a sectional view taken along line IV-IV. In the state shown in FIG. 6, the tightening piece 21 of the operation rod 17 elastically presses the back surface 9 of the valve element 8, and the valve element 8 is in close contact with the valve seat 6 (not shown).
When the operation rod 17 is rotated counterclockwise, for example, 45 degrees as shown by an arrow 28a in FIG.
9 guides the inside of the two pieces 11a and 11b of the L-shaped member 11 to rotate the valve 8 about the pin 3 by approximately 45 degrees, so that a half-open state shown in FIG. Further, FIG.
If it turns 45 degrees counterclockwise as shown by arrow 28b in (B), it will be in the fully closed state shown in FIG.

Since the control valve 1 of the present embodiment has such a structure, the control valve 1 can be easily opened and closed, the reliability and reliability of opening and closing the valve are high, and it is small, simple, and economical. . Further, by providing a tightening piece 21 at one end 10 of the operating rod 17 for pressing the back surface 9 of the valve element 8 to tighten the valve element 8 to the valve seat, the control valve 1 can be fully closed more reliably. .

Then, as shown in FIG.
Groove 26a as a rotation restricting means for restricting the rotation of
And the stopper member 25a and the ribs 27a and 27b reliably restrict the rotation of the operation rod 17 between the fully closed state and the fully opened state of the control valve 1. In this case, retaining material 2
5a fulfills two roles of retaining the operation rod 17 and restricting rotation.

Although three retaining members are provided on the side surface of the operation rod 17 for retaining the operation rod 17 in the control valve 1, the present invention is not limited to this. For example, when the pressure of the fluid is low, only the retaining member 25a shown in FIG. However, in order to prevent the operation rod 17 from coming off in a well-balanced manner, or when the pressure of the fluid is higher, as shown in FIG.
It is preferable to provide them at two places or three places. Further, the operating rod 17 of the embodiment shown in FIG.
Although ribs 27c are provided in addition to the ribs 7a and 27b, the ribs 27c are not necessarily provided.
6b and the groove 26c with ribs may be provided continuously.

The angle α between the straight line 24a and the straight line 24b
Is 90 degrees in the present embodiment, but is not limited thereto. The three-dimensional inclination angle (gradient) of the guide rail 19 is
Thus, the rotation angle can be set to, for example, 60 degrees or 45 degrees, and the angle between the two pieces 11a and 11b of the L-shaped member 11 can be set to an angle other than 90 degrees.

FIG. 9 is a perspective view showing an embodiment of another operation rod used for the control valve according to the present invention. The guide rail 19 formed on the operating rod 17 of the present embodiment has a three-dimensional spiral groove 20 into which one piece 11a of the L-shaped member 11 fits and slides. Piece 11a
Are guided by sliding on the upper and lower surfaces of. However, this 3
The three-dimensional spiral groove 20 is located at the fully open position of the control valve 1 (24 in FIG. 5).
The surface 19 on which one piece 11a of the L-shaped member 11 contacts in b)
g becomes vertical.

Although the control valve in the above embodiment is a two-way valve, the present invention is not limited to this, and is applicable to a three-way valve. The material of the valve body 2, the operating rod 17, the inlet nozzle 30, the outlet nozzle 32, and the like can be a metal such as iron or non-ferrous metal, or a synthetic resin such as polyethylene. In particular, as the valve body 2, a commercially available cheese can be used as it is or by reworking the opening hole. For example, a cheese made of a synthetic resin, which is difficult to bond with an ordinary adhesive such as polyethylene, is bonded by melting the material itself. Therefore, for example, as shown in FIG. 1, the fitting portion inner diameter 29a or 31a of the valve body 2 which is one member to be joined and the fitting portion outer diameter 30a of the inlet nozzle 30 or the outlet nozzle 32 which is the other member. Alternatively, 32a has substantially the same size, and when the inlet / outlet nozzle is inserted into the opening of the valve body 2, a space 36 for a molten pool in which the molten resin is stored is formed between the valve body 2 and the stepped portion 5.

In FIGS. 1 to 9, the same structures and working parts are indicated by the same reference numerals.

Although the present invention has been described in detail with reference to the illustrated embodiments, the present invention is not limited to those embodiments only, and various modifications may be made without departing from the spirit of the present invention. In addition, it goes without saying that a wide variety of modifications can be made.

[0030]

According to the control valve of the present invention, the opening and closing of the valve is easy, the reliability and reliability are high, the size is small, the structure is simple and economical.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a fully closed state of an embodiment of a control valve according to the present invention.

FIG. 2 is a vertical sectional view of the control valve according to the embodiment of FIG. 1 in a fully opened state.

FIG. 3 is a perspective view of an operation rod used in the control valve according to the embodiment of FIG. 1;

FIG. 4 is a perspective view of an L-shaped member that also serves as a hinge used in the control valve according to the embodiment of FIG. 1;

FIG. 5 is a sectional view taken along line II of FIG. 1;

6A and 6B are views for explaining the operation of the control valve according to the embodiment of FIG. 1, wherein FIG. 6A is a partially omitted longitudinal sectional view in a fully closed state, and FIG. 6B is a sectional view taken along line II-II of FIG. It is.

7A and 7B are views for explaining the same operation as in FIG. 6, wherein FIG. 7A is a partially omitted longitudinal sectional view in a half-open state, and FIG.
FIG. 3 is a sectional view taken along line I.

8A and 8B are views for explaining the same operation as FIG. 6, wherein FIG. 8A is a partially omitted longitudinal sectional view in a fully opened state, and FIG.
It is a V line sectional view.

FIG. 9 is a perspective view showing an embodiment of another operation rod used for the control valve according to the present invention.

FIG. 10 is a longitudinal sectional view of a flat plug according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control valve 2 Valve body 3 Pin (support shaft) 6 Valve seat 8 Valve 9 Back 10 One end 11 L-shaped member 12 Inside 17 Operating rod 19 Guide rail 21 Reinforcement piece 25a Retaining member (sliding piece) 26a With rib Groove (annular groove) 27a, 27b Rib

Claims (4)

(57) [Claims] 1. A valve seat and a valve that cooperate with each other to adjust or shut off a flow rate of a fluid, and rotate with respect to a spindle provided on a valve body that holds the valve seat and the valve inside. An operating rod for allowing the valve element, which is supported to be close to the valve seat, to be pressed against or separated from the valve seat, fixed to one end of the rear surface of the valve element, and coaxial with the spindle together with the valve element. An L-shaped member rotatable in a shape, and provided along an outer periphery of one end of the operation rod, and guiding the inside of the L-shaped member by rotating the operation rod to thereby connect the valve element to the support shaft. A control valve, comprising: a guide rail that rotates around the control rail. 2. The operating rod according to claim 1, wherein a tightening piece for pressing a back surface of the valve element and tightening the valve element to the valve seat is provided at one end of the operation rod. Control valve. 3. The adjustment according to claim 1, further comprising a rotation restricting means for restricting rotation of the operation rod between the fully closed state and the fully opened state of the control valve. valve. 4. The rotation restricting means according to claim 3, wherein the rotation restricting means has an annular groove provided in a circumferential direction of a side surface of the operation rod and having a predetermined arc length, and is loosely fitted in the annular groove and fixed to the valve body. A control valve, comprising a sliding piece for restricting rotation of the operation rod and preventing the operation rod from coming off.