KR20180127132A - Easy to move valve disk - Google Patents

Abstract

The present invention relates to a valve used for controlling a fluid. A leakage sometimes occurs because there is a disturbance of a contact between a disc and a sheet due to the force of the fluid, and the disc and the sheet sometimes get damaged due to excessive force. The present invention provides a valve for easily moving the disc regardless of the force of the fluid. There is a balance disc in a cage, and a shaft extends toward a lower portion of the balance disc, so that the shaft is held by a shaft guide and connected to a body part hole. Accordingly, when the fluid passes from bottom to top, due to the force applied to the disc and the shaft, the disc is moved with very slight power when properly calculated using a diameter of the shaft and upper and lower diameters of the disc, and there may be no force other than frictional force and gravity of a sealing part upon movement of the disc based on the calculation. That is, less force is required. The size and the number of springs of an upper driving part are reduced and the weight is reduced, so that it is easy to handle.

Description

EASY TO MOVE VALVE DISK}

   The present invention relates to a valve for fluid control in which the disk and the shaft move up and down together to adjust the outgoing area of the fluid due to the distance between the disk and the seat, thereby completely closing, or opening or in an appropriate position.

In control or general globe valves, the disc receives a lot of fluid force and contacts the seat to prevent leakage. When the force of the fluid is strong, the driver diaphragm connected to the disk shaft or the cylinder must use a strong force of the spring in the actuator, which is stronger, because the force of the fluid must be pressed with a stronger force. Usually one large one or four small to eight. When the valve is in contact with the seat when the valve is closed, the force of the spring is the weakest, so when the seat is slightly opened, the force of the seat and disk fluid causes vibration and damages the seat and the disk. The form of pushing the fluid toward the disk is subjected to more force. There is a balance type disk, but the force of the cross section of the disk shaft is received.

There is a problem in that the movement of the disk of the valve causes the force to move due to the force of the fluid, and the actuator is changed into a large and large force to damage the disk seat shaft, thereby causing leakage in the valve. When the seat and the disk are in contact with each other, it is desired to apply a proper sealing pressure so that the valve can be used for a longer time, the size of the valve is smaller than that of the conventional valve, and the disk is easy to move.

The solution is to extend the shaft part down to the balance disk and hold the shaft below and above the disk. In this case, when the sheet and the disc are closed, the force of the fluid is transmitted to the upper and lower portions of the disc through the balance holes 3-4. If the upper and lower cross- When the sectional area (A, AA) of the shaft (3-1) and the shaft (3-2) are the same, the upward pressure and the downward pressure are applied, and the force is not applied. When the axis moves, the force is small.

It is possible to move with less force when moving disk than existing valve. When installing and operating the actuator, it is possible to select and operate the actuator with less force and it is economically advantageous. The smaller actuator at the time of installation reduces weight and facilitates handling.

Fig. 1 is a cross-
Fig. 2 is a cross-
Figure 3 shows the open closure of the disc,

Make a hole in the existing valve body so that the shaft can pass through the bottom part and seal the inner fluid to prevent it from leaking. The disk is a balanced disk, and holes (3-4) are formed in the middle part of the disk, so that the fluid flows downward and upward from the disk (3-3). At this time, if there is a cage (4) surrounding the disk and the seal between the disk and the cage is closed and the disk and the seat (5) are closed, the fluid will remain. At this time, And the area of the force of the fluid that has passed through the balance hole 3-4 is an area obtained by subtracting øA from øB. At this time, by making the upper and lower area equal to each other, the force acting on the fluid is made zero, and the force to close the action of the driving part on the upper part is smaller than that of the existing valve,

1: Body 2: Bonnet drive part 3: Trim part
3-1: Upper shaft 3-2: Lower shaft 3-3: Disk 3-4: Balance hole
4: cage 5: seat 6: driving part 7: shaft guide S: spring
Arrow: fluid movement direction CLOSE: disk seat closed state
OPEN: Disc seat open status

Claims (2)

A curved flow path type valve for controlling a fluid includes a disk having a cage 4 in the body 1 and a balance hole 3-4 in the disk 1 and a disk 3-1, The lower shaft 3-2 is connected to the shaft guide 7 through the lower body part and the upper shaft 3-1 is connected to the driving part 6. In the closed state, the fluid passes through the disk balance hole The diameter (? A,? AA) of the shafts (3-1, 3-2) and the diameter (? B)
(ØBB) to adjust the force acting on the shaft and disk, allowing easy movement of the disk with less force The disk drive according to any one of claims 1 to 4, wherein the disk (1) can be adjusted by adjusting one or more of the diameter (øA, øAA) of the shaft and the diameter

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