KR101586724B1 - Ball Valve with Accumulator - Google Patents

Abstract

The present invention relates to a ball valve having an accumulator, and a ball valve provided with an accumulator of the present invention includes a body which is fastened to an external pipe at both sides thereof, An upper stem coupled to an upper end of the ball through an upper portion of the body, an upper stem coupled to a lower portion of the body, A stem which is composed of a lower stem and rotates the ball through a handle formed on the upper part and selectively opens and closes the flow path; and a valve for opening and closing the flow path of the ball, And an accumulator provided at the lower end of the body to be introduced or discharged through the body. Accordingly, the present invention provides an accumulator at the lower end of the ball valve to prevent the occurrence of noise by preventing a water hammer generated when the fluid flowing along the flow path is momentarily blocked by the valve, And the durability of the valve can be improved by mitigating the impact that may be applied to the valve due to the water hammer.

Description

[0001] Ball Valve with Accumulator [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve, and more particularly, to a ball valve having an accumulator capable of preventing a water hammer generated when a fluid flowing along a flow path of a valve is momentarily blocked by a valve .

A valve is generally a mechanical element for interrupting fluid flow on a pipeline. A ball valve is a valve that opens or closes a flow path or changes direction, while a ball-type valve rotates at a right angle or a division angle.

These ball valves are widely used for quickly interrupting the fluid flow with simple operation force, and also have a small pressure loss due to the small fluid resistance at full opening.

In addition, it is easy to use and has a relatively high airtightness. In addition, since the valve is opened by 100% straight line when the valve is opened, the pressure drop is small and the ball is driven closely to the seat ring. Even when applied to a high fluid, the reliability of opening and closing is relatively high.

However, ball valves are not used in high temperature and high pressure environments because of the difficulty of sealing to prevent fluid leakage.

In order to solve the above problems, Korean Patent Laid-Open Publication No. 10-2014-0002317 discloses a ball valve, which is a seat structure of a trunnion-type ball valve with improved watertightness, A cap fixed to both the left and right sides of the body, a valve stem vertically installed in the valve body, a ball connected to an end of the valve stem, and a seat disposed between the ball and the cap, A ball valve comprising a sealing means for preventing leakage of a ring fluid, characterized in that the sealing means comprises a wedge-shaped pressure gasket fitted to the boundary between the seat ring and the cap, And a ring-shaped leaf spring whose one end is in contact with the seat ring and the other end is in contact with the cap.

According to this configuration, since the seat ring is constantly pressed against the ball with a constant force, there is no gap between the ball and the seat ring due to abrasion or the like even after long use, and leakage can be prevented. Also, by using a material called graphite, a ball valve that can be used in a high temperature environment is provided.

However, since the fluid located between the ball and the body is stagnated during the opening and closing of the valve due to the flow of the fluid around the ball during the valve opening / closing operation, water may have a frozen wave and the fluid having a volume expansion This can cause valve breakage. If the valve is not opened 100%, there will be severe noise and cavitation, and the opening and closing speed will be too fast to cause a water hammer.

In addition, the water hammer has a problem that the piping system is vigorously caused or the impact sound is generated when the water hammer is severe, so that the present invention has been proposed.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an accumulator capable of preventing a water hammer, which is generated when a fluid flowing along a valve passage is momentarily blocked by an accumulator installed at a lower end of a valve, And an object of the present invention is to provide a ball valve equipped with a ball valve.

In order to achieve the above object, according to the present invention, there is provided an air conditioner comprising: a body to be coupled with an external pipe at both sides; a flow path provided horizontally inside the body; And a lower stem coupled to a lower portion of the body and inserted into a lower end of the ball, wherein the upper stem is coupled to an upper portion of the body, A stem for selectively opening and closing the flow path of the ball by rotating the ball through the inlet hole and the inlet and outlet holes; And an accumulator including the accumulator.

In the present invention, both ends of the body may be further formed with an end connection so that the pipe is fastened to the body.

In addition, it is preferable that a seat and a sheet carrier are formed between the end connection and the ball.

A side seal member is formed between both ends of the inner circumferential surface of the body and the end connection portion, and a packing seal may be formed for sealing between the body and the upper stem.

In addition, the lower stem may have a protrusion inserted into the ball inflow / outflow hole, and the protrusion may be formed with a connection hole connected to the inflow / outflow hole.

According to the present invention, the accumulator includes a body coupled to a lower end surface of the body, a coupling portion formed at an upper center of the body and inserted into a lower portion of the body, a plate formed in an equilibrium in the body, And an elastic member formed at the lower end of the plate.

Here, a fastening portion may be formed on an outer circumferential surface of the coupling portion and a lower portion of the body, and a hole may be formed in the coupling portion to allow fluid to flow in or out.

Meanwhile, it is preferable that a first O-ring is formed on a side surface of the plate.

The elastic member may be a spring formed along an inner surface of the accumulator. A second O-ring may be inserted into a circular groove formed in a lower surface of the body for sealing a contact surface of the body with a lower surface of the body. have.

According to the present invention as described above, an accumulator is provided at the lower end of the ball valve to prevent a water hammer generated when the fluid flowing along the flow path is momentarily blocked by the valve, There is an effect that can be prevented.

In addition, there is an effect that durability of the valve can be improved by mitigating the impact that may be applied to the valve due to the water hammer.

1 is a cross-sectional view of a ball valve having an accumulator according to the present invention,
2 is a cross-sectional view showing a state in which a ball valve with an accumulator of the present invention closes a flow path.
3 is a cross-sectional view showing a state in which a ball valve having an accumulator of the present invention opens a flow path.

Hereinafter, a ball valve having an accumulator according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a ball valve having an accumulator according to the present invention, FIG. 2 is a sectional view showing a state in which a ball valve with an accumulator of the present invention closes a flow path, Sectional view showing a state in which a ball valve with an accumulator is opened in a flow path.

The present invention relates to a ball valve equipped with an accumulator capable of preventing a water hammer generated when a fluid flowing along a flow path of a valve is momentarily blocked by a valve.

A valve is generally a mechanical element for interrupting fluid flow on a pipeline. A ball valve is a valve that opens or closes a flow path or changes direction, while a ball-type valve rotates at a right angle or a division angle.

These ball valves are widely used for quickly interrupting the fluid flow with simple operation force, and also have a small pressure loss due to the small fluid resistance at full opening.

However, when the fluid flowing through the pipe is momentarily blocked by the valve, the fluid changes from the kinetic energy to the pressure energy, resulting in a sudden pressure rise, and the rising pressure becomes the pressure wave to repeat the inside of the pipe at the closed point and the upstream side for a predetermined time But gradually disappears. This phenomenon is called a "water hammer", and in severe cases it may cause vibration of the piping system, generating impact noise, and causing leakage.

According to an aspect of the present invention, an accumulator is provided at the lower end of the body so as to allow fluid to flow in or out of the inflow hole and the inflow / outflow hole depending on whether the ball passage is opened or closed.

As shown in FIG. 1, the ball valve provided with the accumulator of the present invention includes a body 100 to be coupled to an external pipe at both sides thereof, A ball 200 having an inlet hole 240 at one side and an inlet and outlet hole 260 at a lower end thereof and an upper end of the ball 200 through an upper portion of the body 100, And a lower stem 340 coupled with a lower portion of the body 100 and inserted into a lower end of the ball 200. The upper stem 320 and the upper stem 340 are coupled to each other through a handle formed on the upper portion of the ball 200, A stem 300 for selectively opening and closing the flow path 220 and rotating the flow path 220 of the ball 200 so that fluid flows in or out of the flow path 220 according to whether the flow path 220 of the ball 200 is opened or closed, And an accumulator 400 provided therein.

A pipe (not shown) may be connected to both sides of the body 100, and an end connection 120 may be formed to connect the pipe to the body 100.

A screw thread is formed on the inner circumferential surface of the body 100 and the outer circumferential surface of the end connection 120 to fasten the body 100 and the end connection 120, and the pipe is connected to an end connection (120).

At this time, the end connection part 120 may be formed of a threaded pipe, a welded pipe, a flanged type or the like depending on the use of the valve and the use environment thereof.

A ball 200 having a channel 220 horizontally formed therein is provided in the body 100. An inlet hole 240 is formed in one side of the ball 200 so as to be orthogonal to the channel 220, And an inflow and outflow hole 260 is formed in a lower end surface of the ball 200.

When the valve is closed through the inlet hole 240 and the inlet and outlet holes 260, the fluid flows into the accumulator to be described later. When the valve is opened through the inlet and outlet holes 260, the fluid flows from the accumulator to the channel do.

In addition, a stem 300 for vertically fixing the ball 200 is formed at the upper and lower portions of the ball 200. The stem 300 includes an upper stem 320 which penetrates the upper portion of the body 100 and engages with an upper end of the ball 200 and an upper stem 320 coupled to a lower portion of the body 100, And a lower stem 340 inserted into and coupled to the lower end of the lower stem.

2, a sheet 500 and a sheet carrier 600 are formed between the end connection 120 and the ball 200 for water tightness, and the sheet carrier 600 and the end A leaf spring 700 is provided between both ends of the seat carrier 600 and the end connection 120 in a state where the end connection 120 is engaged.

Here, the leaf spring 700 maintains water tightness because the sheet 500 formed of an elastic material is brought into close contact with the ball 200 with a certain force.

On the other hand, when the flow of the fluid is abruptly shut off due to the sudden opening and closing of the valve, or when the gas is mixed into the pipeline, the abnormal pressure caused by the sudden change of the flow rate of the pipeline causes the vibration,

At this time, the above-mentioned watertightness structure improves the watertightness between the ball 200 and the seat 500 and improves the durability of the ball valve.

In addition, a side sealing member 140 is formed between both ends of the inner circumferential surface of the body 100 and the end connection 120. The side sealing member 140 thus formed mitigates the impact due to the vibration generated when the fluid flows through the pipe, and prevents leakage of the fluid generated in the pipe.

In addition, a packing seal 322 is formed for sealing between the body 100 and the upper stem 320.

A handle is formed on the upper stem 320, and a handle is mounted to rotate the stem 300. At this time, as the stem 300 is rotated, the ball 200 also rotates together to selectively open and close the flow path 220.

A protrusion 342 is formed in the lower stem 340 to be inserted into the inflow and outflow hole 260 of the ball 200. The protrusion 342 is provided with a connection hole 344 connected to the inflow and outflow hole 260 Is formed.

Here, the inner diameter of the inflow / outflow hole 260 and the inner diameter of the connection hole 344 are formed to have the same size.

When the fluid flows into the channel, the handle is rotated to close the valve. As shown in FIG. 2, when the fluid flows into the ball 200 through the inflow hole 240 and flows into the ball 200 Fluid is stored in the accumulator (400) along the inlet and outlet holes (260).

The accumulator 400 includes a main body 420 coupled to a lower end surface of the body 100, a coupling portion 440 formed at the upper center of the main body 420 and inserted into a lower portion of the body 100, A plate 460 formed in an equilibrium state in the body 420, and an elastic member formed at a lower end of the plate 460.

A fastening portion is formed on an outer circumferential surface of the coupling portion 440 and a lower portion of the body 100.

The fastening portion may include a thread formed on the outer peripheral surface of the coupling portion 440 and a thread formed on the inner wall of the insertion hole formed in the lower portion of the body 100 to insert the coupling portion 440. [ As shown in Fig.

A hole 442 is formed in the coupling part 440 to allow fluid to flow in or out.

The inner diameter of the hole 442 is the same as the inner diameter of the connection hole 344 so that one end of the hole 442 is connected to one end of the connection hole 344.

When the flow passage 220 is opened and the fluid flows along the flow passage 220 and the ball 200 is rotated to close the flow passage 220, The fluid flowing through the inflow hole 240 flows into the ball 200.

The fluid introduced into the ball 200 flows into the accumulator 400 through the hole 442 of the coupling part 440 through the inlet and outlet holes 260 formed in the lower end surface of the ball 200 .

Here, the fluid flows into the accumulator 400 while pushing the plate 460 downward under the pressure that flows through the channel.

The elastic member may be provided as a spring 480 along the inner surface of the accumulator 400 so that when the fluid presses the plate 460 of the accumulator 400, And the fluid is stored in the accumulator (400).

At this time, the elastic force of the spring 480 is preferably determined in consideration of the amount of the fluid flowing into the accumulator 400, the pressure, and the like, so as to cancel the vibration due to abnormal pressure caused by the rapid opening and closing of the valve.

3, when the flow path 220 is opened, the plate 460 moves upward due to the elastic force of the spring 480, and the fluid stored in the accumulator 400 flows into the holes 442 And the connection hole 344 through the inlet / outlet hole 260. The flow path 220 is formed in the inlet /

A first O-ring 462 is formed on a side surface of the plate 460 so that fluid stored in the upper surface of the plate 460 does not leak to the lower portion of the plate 460.

A circular groove is formed on the lower surface of the body 100 with respect to the coupling part 440. The circular groove is formed in the circular groove for water tightness between the lower surface of the body 100 and the contact surface of the body 420. [ 2 O-rings 422 are inserted.

The area of the second O-ring 422 contacting the bottom surface of the sea and the contact surface of the main body 420 and the thickness of the second O-ring 422 may be further reduced by considering the size of the accumulator 400 It is preferable to be formed within a range that can be effective.

As described above, according to the present invention, an accumulator is provided at the lower end of the ball valve to prevent a water hammer generated when the fluid flowing along the flow path is momentarily blocked by the valve, And the durability of the valve can be improved by mitigating the impact that may be applied to the valve due to the water hammer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

100: Body 120: End connection
140: side sealing member 200: ball
220: channel 240: inlet hole
260: Inlet / outlet hole 300: Stem
320: upper stem 322: packing seal
340: lower stem 342:
344: Connection hole 400: Accumulator
420: main body 422: second o-ring
440: coupling portion 442: hole
460: plate 462: first o-ring
480: spring 500: sheet
600: sheet carrier 700: leaf spring

Claims (12)

A body fastened to an external pipe at both sides;
A ball provided inside the body and formed with a flow path horizontally and having an inlet hole on one side and an inlet and outlet hole on the lower side;
An upper stem that penetrates an upper portion of the body and engages with an upper end of the ball, and a lower stem that is engaged with a lower portion of the body and is inserted into a lower end of the ball, A stem selectively opening and closing the flow path; And
An accumulator provided at a lower end of the body to allow fluid to flow in or out through the inflow hole and the inflow / outflow hole depending on whether the ball passage is opened or closed;
And,
Wherein the lower stem is formed with a protrusion to be inserted into the inflow / outflow hole of the ball, and the protrusion is formed with a connection hole connected to the inflow / outflow hole. The method according to claim 1,
And an end connection is formed on both sides of the body so that the pipe is fastened to the body. The method of claim 2,
And a seat and a sheet carrier are formed between the end connection and the ball. The method of claim 2,
Wherein a side sealing member is formed between both ends of the inner circumferential surface of the body and the end connecting portion. The method according to claim 1,
Wherein a packing seal is formed for sealing between the body and the upper stem. delete The method according to claim 1,
The accumulator
A body coupled to a bottom surface of the body,
An engaging portion formed at an upper center of the body and inserted into a lower portion of the body;
A plate formed in a balanced shape in the body,
And an elastic member formed at a lower end of the plate. The method of claim 7,
And a coupling part is formed on an outer circumferential surface of the coupling part and a lower part of the body. The method of claim 7,
And a hole is formed in the coupling portion to allow fluid to flow in or out. The method of claim 7,
And a first O-ring is formed on a side surface of the plate. The method of claim 7,
Wherein the resilient member is provided with a spring formed along the inner surface of the accumulator. The method of claim 7,
Wherein a second O-ring is inserted into a circular groove formed in a lower surface of the body for sealing the lower surface of the body and the contact surface of the body.

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