JPS5814299Y2 - valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device, for example, one that opens and closes a relatively large amount of water flow, such as a water gate in a dam or irrigation canal.

The previously proposed valve device includes a casing in which a valve seat is formed at the peripheral edge of a liquid discharge port, and a guide frame whose upper surface is closed through a liquid passage opening above the valve seat; A valve body is fitted loosely into the guide frame of the casing so as to be movable up and down, and has an engaging edge at the lower end for opening and closing the valve seat, and a small liquid passage hole at the upper end communicating with the liquid discharge port. , integrally has a locking part that is vertically movably inserted into the liquid passage small hole of the valve body and the guide hole of the guide engagement part and pushes up the guide and engagement part of the valve body from below, and also has a liquid passage part. fL
and an elevating rod integrally having an auxiliary valve body that closes the valve body from above, and the valve body is fitted into the elevating rod so as to be movable up and down between the locking portion and the auxiliary valve body.

However, this device has the following drawbacks: When the valve body has a liquid passage opening, the liquid flowing from the liquid passage opening to the liquid discharge port may cause the liquid to flow upward to the lower peripheral edge of the valve body. Hydraulic pressure is acting to push up the valve body, so when the valve body is lowered, the valve body is pushed down by the secondary valve body, which descends with the lifting rod while blocking the liquid passage hole. As the valve body closes the valve seat of the liquid discharge port, the liquid pressure pushing up the lower edge of the valve body decreases. When the downward force of the liquid flowing into the valve becomes larger, the valve body instantly lowers faster than the lifting rod, separates from the sub-valve body, and rapidly closes the valve seat, causing water to flow upstream of the valve seat. cause the phenomenon of immersion.

The present invention was devised in view of these points, and an object of the present invention is to effectively prevent the water/magnetic phenomenon in a valve device with an extremely simple configuration.

The structure of the present invention is that a casing 1 has a valve seat 5 formed on the periphery of a liquid discharge port 4, and a guide frame 3 whose upper surface is closed through a liquid passage opening 41 above the valve seat 5. and,
It is loosely fitted into the guide frame 3 of the casing 1 so as to be movable up and down, and has an engaging edge 20 at the lower end for opening and closing the valve seat 5, and a small liquid passage hole at the upper end communicating with the liquid discharge port 4. 14, and a valve body 12 which is inserted into the liquid passage small hole 14 of the valve body 12 and the guide hole 17 of the guide engagement part 18 so as to be able to move up and down, and pushes up the guide engagement part 18 of the valve body 12 from below. Lifting rod 22 that integrally has a branch 28 and an auxiliary valve body 23 that closes the small liquid passage hole 14 from above.
and a nut 25 screwed onto the upper threaded portion of the closing plate 13 having the liquid passage small hole 14 in the valve body 12 and the lifting rod 22.
The spring receiver is interposed between the plate 24 and the valve body 12 in a direction that separates the small liquid passage hole 14 from the sub-valve body 23 and brings the guide engagement part 18 into contact with the engagement part 28. The valve body 12 includes a spring 26 that biases the valve body 12.
The locking portion 28 and the sub-valve body 23 are fitted into the lifting rod 22 so as to be movable up and down.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a casing, and the case/puffer 1 is composed of a main body frame 2 and a cylindrical guide frame 3 whose upper surface is closed integrally with the main body frame 2.

Further, a liquid discharge port 4 is formed in the lower part of the main body frame 2, and a cylindrical valve seat 5 is provided at the peripheral edge of the liquid discharge port 40.
is integrally formed with a liquid passage opening 41 above the valve seat 5.
The guide frame 3 is provided through the guide frame 3.

Further, a liquid inlet body 6 is integrally provided on one side of the main body frame 2, and a support T is integrally provided on the other side of the main body frame 2 in a horizontal manner, and this support A support piece 8 is vertically attached to the outer end of the body 7 with bolts and nuts 9, and a center part of a float link 10 is attached to the lower end of the support piece 8 with a bolt and nut 9.
It is supported by a nut 11 so as to be able to rotate up and down using this as a fulcrum.

Further, the guide frame body 3 is configured to have a guide portion 3a projecting into the main body frame 2 at the lower end thereof.

The liquid inlet body 6 is screwed onto a water pipe 43 inserted through the partition wall 42.

Reference numeral 12 denotes a valve body, which is formed into a cylindrical shape and is loosely fitted into the guide frame 3 through a fitting gap 44 so as to be vertically movable.

A shielding plate 13 is integrally formed inside the upper part of this valve body 12, and the liquid discharge port 4 is formed in the center of this shielding plate 13.
A small liquid passage hole 14 communicating with the liquid passage hole 14 is bored, and a locking recess 15 is formed at the upper periphery of the liquid passage small hole 14 .

Further, a guide plate 16 is integrally formed in the lower part of the valve body 12, and a guide retaining part 18 having a guide hole 17 is formed in the center of the guide plate 16. An outflow hole 19 communicating with the liquid discharge port 4 is formed around the periphery.

A liquid chamber 45 is formed above the valve body 12 to store liquid that has flowed through the fitting gap 44.

Further, an engagement edge 20 is formed on the lower end peripheral edge of the valve body 12 to engage with the valve seat 5 in a liquid-tight manner.
A tapered pressure receiving portion 21 is formed diagonally downward from the liquid passage opening 41 to the liquid discharge port 4 on the outer circumferential surface of the 0.

Next, a screw rod 22 as a lifting rod is loosely fitted into the small liquid passage FL14 and the guide hole 17 of the valve body 12 so as to be able to rise and fall freely, and the small liquid passage hole 14 is made liquid-tight in the upper part of this screw rod 22. An auxiliary valve body 23 to be closed is screwed and fixed so that its position can be adjusted, and a nut 25 is adjustably screwed and fixed to the upper part of the auxiliary valve body 23 through a plate 24.
It's true.

Further, a spring 26 is wound around the threaded rod 22 between the shielding plate 13 and the plate 24 of the spring receiver, and the lower end of the spring 26 is fitted into the locking recess 15 of the shielding plate 13. The upper end of the spring receiver is engaged with the locking step 27 of the plate 24.

Then, the valve body 12 is urged downward by the spring 26, and the threaded rod 22 is urged upward,
The sub-valve body 23 screwed onto the threaded rod 22 is always energized to open the small liquid passage hole 14.

Further, a double nut 28 as a locking part located at the lower measuring part of the threaded rod 22, that is, below the guide engagement part 18, engages with the guide engagement part 18 and pushes up the valve body 12. With the sub-valve body 23 in contact with the liquid passage 1ML14, it is screwed and fixed to the lower part of the guide engagement portion 18 with a gap 46 therebetween so as to be able to freely adjust its position.

Also, the flow link 10 is attached to the lower end of this threaded rod 22.
One shaft portion is rotatably connected by a shaft 29.

A threaded portion 32 of a mounting rod 31 of a float 30 is attached to the other end of the float link 10 via a nut 33 fixed to the float link 10 so as to be height adjustable.

Next, the operation of the above structure will be explained.

The figure shows a state in which the float 30 has floated and the water level w1 in the liquid receiving part A has reached a predetermined position.

Therefore - the rotation of the float link 10 causes the threaded rod 2 to
2 is forcibly lowered, and the engaging edge 2o of the valve body 12 liquid-tightly engages with the valve seat 5, while the sub-valve body 23 is moved by the spring 26.
It is lowered against the pressure, liquid-tightly engages the small liquid passage hole 14, and closes the one-liquid discharge port 4.

Next, when the liquid W□ in the liquid receiving part A decreases, the float link 10 rotates clockwise about the bolt of the bolt/nut 11 as a fulcrum, and the screw rod 22 is pushed up.

At the same time, the compressed spring 26 is restored, and the sub-valve body 23 is pushed up. Before the valve main body 12 is pushed up, the sub-valve body 23 is first separated from the small liquid passage hole 14. 14 is opened, and the liquid W2 flowing into the liquid chamber 45 in the upper part of the valve body 12 through the fitting gap 44 is discharged from the small liquid passage hole 14, and this liquid flows through the outflow hole 19 of the valve body 12. The liquid is discharged from the liquid discharge port 4 into the liquid receiving part A.

When the threaded rod 22 is further pushed up by the float link 10, the double nut 28 screwed in the middle of the threaded rod 22 engages with the guide engagement part 18, and the guide having this guide engagement part 18 also engages with the guide engagement part 18. The entire valve body 12 is pushed up via the plate 16, and the engaging edge 20 at its lower end is separated from the valve seat 5, and the one-flow liquid volume port 41 directly communicates with the liquid discharge port 4, and the liquid inlet body 6 into the casing 1 is discharged into the liquid receiving portion A through the liquid passage opening 41, the valve seat 5, and the liquid discharge port 4.

In this way, the liquid W2 above the valve body 12 flows through the small liquid passage hole 1.
This is because the valve body 12 is pushed up after the liquid is drained through the valve 4.

The valve body 12 can be pushed up smoothly.

In this case, when the valve body 12 is pushed up by the double nut 28, the pressure of the introduced liquid W is applied to the pressure receiving part 21 because the tapered pressure receiving part 21 is formed around the lower end of the valve main body 12. , acts to levitate the valve body 12 via this pressure receiving portion 21, and assists in pushing up the valve body 12.

Therefore, the valve body 12 can be pushed up more easily and the liquid discharge port 4 can be opened quickly.

Next, when a predetermined amount is supplied to the liquid receiving part A, the float 30
is floated, the float link 10 is rotated counterclockwise, and the screw rod 22 connected thereto is lowered.

In this case, the spring receiver at the upper end of the screw rod 22 is connected to the plate 24.
Since a spring 26 is interposed between the valve body 12 and the closing plate 13 of the valve body 12, the valve body 12 is lowered by the spring 26 while being pressed against the double nut 28, and the spring 26 moves the valve body 12 toward the valve seat. 5, the auxiliary valve body 23 is not compressed only by lowering the threaded rod 22, so the auxiliary valve body 23 descends while maintaining a distance from the small liquid passage hole 14, and as the threaded rod 22 lowers, the liquid flows / The valve body 12 is moved downward via the spring 26 while discharging the liquid W2 in the liquid chamber 45 from the No. L14.

Then, the engaging edge 20 of the valve body 12 is liquid-tightly engaged with the valve seat 5, and the liquid passage opening 41 is closed.

Next, when the screw rod 22 is further moved downward while the valve body 12 is locked by the valve seat 5, the spring 26
is not compressed, the sub-valve body 23 is lowered and the small liquid passage hole 14 is lowered.
is fluid-tightly sealed and closed by this sub-valve body 23.

In this way, the valve body 12. The valve body 12 descends together with the screw rod 22 while being pressed against the double nut 28 by the spring 26, and after the valve body 12 comes into contact with the valve seat 5, the sub-valve body 23
2 descends together with the threaded rod 22 and closes the small liquid passage hole 14, so even if the upward hydraulic pressure applied to the pressure receiving part 21 of the valve body 12 decreases as the valve body 12 closes the valve seat 5,
There is no risk that the valve body 12 will descend faster than the threaded rod 22, and therefore the liquid discharge port 4 of the casing 1 is smoothly closed without causing a water hammer phenomenon.

According to the present invention, a valve body for opening and closing the liquid discharge port is provided in the casing, and a small liquid passage hole communicating with the liquid discharge opening is bored in the valve body, and an elevator rod is connected to the liquid passage hole. The valve body is urged downward by a spring, and the small liquid passage hole of the valve body is separated from the secondary valve body, and the valve body is attached to the locking part of the lifting rod. Since the liquid discharge port of the casing is pressed, when the liquid discharge port of the casing is closed, the valve body is lowered with the small liquid passage hole open, and after this valve body closes the liquid discharge port, the sub-valve body resists the spring. and descends to close the small fluid passage hole.

Therefore, there is no risk that only the valve body will descend faster than the lifting rod and instantly close the valve seat, which has the effect of preventing the water phenomenon from occurring.

Moreover, since the above spring is interposed between the closing plate of the valve body and the spring receiver, which is locked by a nut screwed into the upper end screw part of the lifting rod, the sub-valve body opens from the liquid passage small hole. The force of the spring can be adjusted with this nut.
For example, if the hydraulic pressure inside the guide frame is high and the force in the direction of closing the sub-valve body is strong, the sub-valve body can be opened easily by adjusting the nut to increase the repulsive force of the spring.

In addition, when the valve body is raised, the return force of the spring ensures that the sub-valve body and the small liquid passage hole are separated from each other, and then the valve body is pushed up, so that the liquid above the valve body is reliably drained. The valve body rises quickly and smoothly with little resistance, and the liquid discharge port can be easily opened.

Therefore, it is possible to provide a valve device that can always smoothly open and close the liquid discharge port of the casing and can sensitively deal with cracks and excess or deficiency of liquid.

[Brief explanation of the drawing]

The figure is a partially cutaway front view showing an embodiment of the valve device of the present invention. 1...Casing, 3...Guide frame body,
4...Liquid discharge port, 510. ...Valentine seat, 12.
...Valve body, 13...Blocking plate, 14...
...Liquid passage small hole, 1γ... Guide hole, 1B-0
1, . . . Guide engagement portion, 20 . . . Engagement edge, 22 .
...Screw rod as a lifting rod, 23...Sub-valve body, 24...91. Spring support plate, 25...
...Natsuto, 26...Spring, 28...
...Double nut as a locking part, 41...
・Liquid opening sail

Claims (1)

[Scope of utility model registration request] A casing comprising a valve seat formed at the peripheral edge of a liquid discharge port and a guide frame whose upper surface is closed through a liquid passage opening above the valve seat, and a guide frame of the casing. A valve body that is loosely fitted in the interior so as to be movable up and down, has an engaging edge at the lower end for opening and closing the valve seat, and has a small liquid passage hole at the upper end that communicates with the liquid discharge port, and liquid passage through the valve body. A sub-valve body is integrally provided with a locking part that is inserted into the small hole and the guide hole of the guide engagement part so as to be vertically movable and pushes up the guide and holding part of the valve body from below, and closes the small liquid passage hole from above. A lifting rod integrally formed with the valve body, a blocking plate having a small liquid passage hole in the valve body, and a spring receiver secured by a nut screwed onto the upper end threaded portion of the lifting rod are interposed between the plate and the above-mentioned valve body. The valve body is provided with a spring that urges the valve body to separate the small liquid passage hole from the auxiliary valve body and bring the guide engagement portion into contact with the locking portion. A valve device fitted to a lifting rod so as to be able to move up and down between the valve device.