KR101580459B1 - Safety Ball Valve - Google Patents

Abstract

The present invention relates to a valve, and according to the present invention, an intermittent part for interrupting the movement of fluid flowing along a flow path formed from one side to the other side; A sealing member sealing one or both sides of the intermittent portion so that the fluid does not flow out between the flow path and the intermittent portion; A retainer for supporting the sealing member so that the sealing member can be sealed in contact with the intermittent portion; A valve body having the intermittent portion, the sealing member, or the retainer so that the flow path formed in the intermittent portion can communicate with an external pipe, and can be directly or indirectly fastened to an external pipe; And a cushioning portion coupled to the valve body and formed at a position deviating from the flow path to attenuate or relieve pressure caused by the fluid flowing into the closed space formed between the valve body, the intermittent portion, and the sealing member The fluid discharged from the seat ring and the ball to the closed space on one side of the ball valve can be drawn out to the cushioning portion to suppress the shortening of the life of the ball valve due to the pressure rise in the closed space, Which prevents the leakage of poisonous fluid to the outside by preventing breakage of the ball valve due to the rotation of the ball valve, thereby greatly improving the safety of the ball valve.

Description

[0001] Safety Ball Valve [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 capable of preventing or relieving a pressure of a fluid leaked from a flow path in a closed cavity of a ball valve.

Many products are produced in modern society, which helps to improve the convenience of human life. The process of producing such a variety of products requires a variety of materials or materials, and often a high-purity gas or fluid is used. In the production process, these fluids must be supplied smoothly to the right place, and many pipelines are installed. In many places where pipelines are installed, it is necessary to intermittently control the flow of the fluid from time to time.

Unlike a pipe, a valve is made of an assembly. In order to prevent the leakage of the components between the components constituting the valve, the sealing is very essential in terms of safety and productivity.

Therefore, many techniques for valves have been proposed and utilized.

There are various types of valves, of which the ball valve type is also widely used. Ball valves are of the floating type and Trunnion type, and usually Trunnion type ball valves are used. Korean Patent Publication No. 10-2013-0102968 (entitled: Trunnion type ball valve and its manufacturing method, hereinafter referred to as prior art 1) and a Korean registered utility model 20- 0334628 (design name: sealing structure of trunnion type ball valve, hereinafter referred to as prior art 2).

In the prior art 2, the ball valve of Prior Art 2 has a sealed space between the body and the seat ring and the ball. When the ball valve is frequently used, the sealing effect between the seat ring and the ball is lowered, and the fluid flows out to the sealed space and accumulates.

In this way, the pressure accumulated by the fluid accumulated in the closed space causes the ball valve to be continuously subjected to stress, resulting in an accident that the fluid leaks from the ball valve to the outside. Especially when the fluid is a toxic gas, the damage is serious. Therefore, it has become an important problem to remove the fluid that flows out and accumulates in the closed space. Here, as in the technique 1 of the present invention, although a support plate is installed in such a closed space, it is impossible to eliminate the closed space itself, and thus, it is not the ultimate solution.

Therefore, when the ball valve is broken due to the thermal expansion due to the excessive flow of fluid from the seat ring and the fluid in the closed space due to the heat from the outside, the fluid which is poisonous gas flows out to the outside, There was still a serious problem that could be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a safety ball valve capable of reliably relieving pressure caused by fluids such as gas discharged into a closed space formed between a valve body and a ball or a seat ring .

According to an aspect of the present invention, there is provided a safety ball valve comprising: an intermittent portion for interrupting movement of fluid flowing along a flow path formed from one side to the other side; A sealing member sealing one or both sides of the intermittent portion so that the fluid does not flow out between the flow path and the intermittent portion; A retainer for supporting the sealing member so that the sealing member can be sealed in contact with the intermittent portion; A valve body having the intermittent portion, the sealing member, or the retainer so that the flow path formed in the intermittent portion can communicate with an external pipe, and can be directly or indirectly fastened to an external pipe; And a cushioning portion coupled to the valve body and formed at a position deviating from the flow path to attenuate or relieve pressure caused by the fluid flowing into the closed space formed between the valve body, the intermittent portion, and the sealing member May be one of the features.

Here, the buffer may include a container provided with a receiving space for receiving a fluid flowing into the closed space; And a first check valve for interrupting the movement of the fluid from the closed space to the containing space provided in the container.

Further, the cushioning portion may be provided with a cushioning hole for communicating the closed space with the accommodating space to accommodate the fluid flowing into the closed space, and the pressure of the fluid flowing into the closed space may reach a predetermined pressure , The fluid in the closed space flows into the accommodation space through the buffer hole.

Here, an O-ring is positioned between the valve body and the buffer to seal the valve body. May be further included.

Further, the buffering portion may include: a second check valve for interrupting fluid movement from the containing space to the enclosed space provided in the container; May be further included.

Wherein a removal hole for communicating between the accommodating space inside the container and an external pipe connected to the other side of the intermittent portion is provided and the fluid accommodated in the accommodating space is supplied to the outside through the removal hole, And a third check valve for interrupting the movement to the pipe.

Here, the first check valve may include a cushioning ball for blocking the movement of the fluid; And an intermittent spring for providing an elastic force so that the cushioning ball can intercept the movement of the fluid. May be another feature of the present invention.

Here, the intermittent portion may include: a ball having a passage formed from one side to the other side; And a stem coupled to an upper side of the ball and serving as a rotation center axis of the ball.

Here, graphite may be used as a ring-type sealing member located between the stem and the valve body.

The sealing member may further include an annular leaf spring for providing an elastic force to press the retainer with a predetermined force.

Here, the sealing member may be a seat-ring.

The safety ball valve according to the present invention can extract the fluid that has flowed out from the seat ring on one side of the ball valve to the closed space to the cushioning portion so as to prevent or prevent the pressure in the closed space from rising excessively to the ball valve .

Therefore, there is an effect of suppressing the life span of the ball valve due to an increase in the pressure in the closed space.

In addition, since the poisonous fluid is prevented from leaking to the outside by preventing breakage of the ball valve due to an increase in the pressure in the closed space, safety of the ball valve is greatly improved.

In addition, since the fluid contained in the accommodation space can be discharged to an external pipe connected to the other end of the ball valve, the ball valve can be easily managed.

1 is a perspective sectional view schematically showing a safety ball valve according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a safety ball valve according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a safety ball valve according to a modified embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view schematically showing a safety ball valve according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically showing a safety ball valve according to an embodiment of the present invention.

1 and 2, a safety ball valve according to an embodiment of the present invention includes an intermittent portion, a sealing member, a retainer, a valve body, and a buffer.

The intermittent part 100 interrupts the movement of the fluid flowing along the flow path formed from one side to the other side.

The intermittent part 100 includes a ball 110 and a stem 120.

1 and 2, the ball 110 penetrates from one side to the other, and a flow path is formed. The fluid flows from one side to the other along the flow path thus formed.

The stem 120 is fastened to the upper side of the ball 110 and becomes the rotation center axis of the ball 110. In other words, the stem 120 is fastened on the upper side perpendicular to the flow path of the ball 110. The ball 110 is rotated together with the stem 120 so that the flow path of the ball 110 is changed. For example, as the stem 120 rotates 90 degrees, the flow path of the ball 110 and the ball 110 is changed in 90 degrees.

The direction of rotation here is not important. However, it is important that the flow path formed in the ball 110 is rotated by the rotation of the stem 120 and the ball 110 so that the flow path in the safety ball valve is selectively opened or closed.

The sealing member 200 seals the fluid at one side or the other side of the intermittent part 100 so as to prevent the fluid from flowing out between the flow path and the intermittent part 100. That is, since it is important that the fluid does not flow out of the flow path in any direction other than the flow path regardless of whether the flow path in the safety ball valve is in an open state or a closed state, the sealing member 200 is sealed to suppress fluid outflow.

It is preferable to use a seat-ring 200 as the sealing member 200.

The retainer 300 supports the sealing member 200 so that the sealing member 200 contacts the intermittent portion 100 and can be sealed. 1 and 2, the retainer 300 supports the sealing member 200 so that the sealing member 200 contacts the ball 110 of the intermittent portion 100 while sealing.

The annular leaf spring 310 provides an elastic force so that the retainer 300 can push the sealing member 200 with a predetermined force. Here, the predetermined force is enough to push the sealing member 200 in a proper sealing manner, and the magnitude of such a force is determined by designing a leaf spring having an elastic force of a proper size when designing the safety ball valve Can be set.

The retainer 300 supports the sealing member 200 such that the sealing member 200 is pressed against the outer circumferential surface of the ball 110 while pressing the annular leaf spring 310 with an elastic force.

The valve body 400 has a ball 110, a sealing member 200, or a retainer 300 therein so that a flow path formed in the intermittent part 100 can communicate with an external pipe (not shown). The valve body 400 is directly or indirectly fastened to an external pipe (not shown).

The outer tube and the valve body 400 may be indirectly fastened to each other using a connection socket or a connection.

It is preferable that end connections 440 and 441 which can be fastened to an external pipe are fastened to both ends of the valve body 400 and external pipes are fastened to the end connections 400 and 441 .

The valve body 400 is configured such that fluid flowing from an external pipe (not shown) fastened to one end connection 440 passes through the valves 400 and 100 and is connected to an external pipe City).

It is preferable that annular sealing members 410 and 411 are mounted between the stem 120 and the valve body 400 to perform sealing.

Here, it is preferable that a sealing member 411 made of a material such as Teflon is provided, and a sealing member 410 made of a material resistant to heat is mounted therebetween.

Here, the sealing member 410 made of a material strong in heat is preferably made of a graphite 410.

Graphite is heat resistant. Therefore, it is possible to prevent or prevent the stem 120 and the ball 110 from collapsing in a bad environment where heat is applied to the valve, such as a fire. It is also preferable to use an annular sealing member 410 made of graphite because it functions as a sealing member to suppress leaks and fluid leakage.

The buffer part 500 is fastened to the valve body 400. As a space formed at a position deviated from the flow path, the pressure caused by the fluid flowing out to the closed space formed between the valve body 400, the intermittent portion 100, or the sealing member 200 is attenuated or eliminated. That is, a small closed space 430 is formed between the valve body 400, the intermittent part 100, or the sealing member 200. The buffer unit 500 attenuates or eliminates the pressure caused by the fluid flowing into the closed space 430.

The buffer part 500 includes a container 510 and a first check valve 520.

The container 510 receives the fluid that has flowed out into the closed space 430. To this end, the container 510 is provided with a receiving space 530 for receiving the fluid discharged into the closed space.

The buffer part 500 is provided with a buffer hole 525 for communicating the enclosed space 430 with the accommodation space 530 in order to accommodate the fluid flowing out to the enclosed space 430.

When the pressure of the fluid flowing out into the closed space 430 reaches a predetermined pressure, the fluid flows into the accommodation space 530 through the buffer hole 525. The first check valve 520 is preferably provided in the buffer hole 525 so that the fluid flows only in one direction according to the pressure of the discharged fluid.

The first check valve 520 interrupts the movement of the fluid from the closed space 430 to the accommodation space 530 provided in the container 510 through the buffer hole 525.

The first check valve 520 includes a cushioning ball 521 and an intermittent spring 523. Here, the buffering balls 521 prevent the fluid from moving. The intermittent spring 523 provides an elastic force so that the cushioning ball 521 can control the movement of the fluid. The first check valve 520 configured as described above is capable of moving (flowing) fluid only in one direction.

That is, when the pressure of the fluid flowing out to the closed space 430 reaches a predetermined pressure, the first check valve 520 is opened. In other words, when the pressure in the closed space 430 is increased, the fluid pushes the buffer ball 521 of the first check valve 520. At this time, since the pressure in the closed space 430 is high, It is possible to overcome the elastic force of the elastic member 523.

When the cushioning ball 521 is pushed to overcome the elastic force of the intermittent spring 523, the fluid can flow into the accommodation space 530 through the cushioning hole 525. That is, the flow path of the buffer hole 525 is opened.

When the flow path of the buffer hole 525 is opened, that is, when the first check valve 520 is opened, the pressure of the fluid in the closed space 430 drops and the fluid in the closed space 430 Passes through the buffer hole (525) and the first check valve (520), and enters the accommodation space (530). When the pressure of the fluid in the closed space 430 drops (that is, the pressure of the fluid becomes lower than the predetermined pressure), the first check valve 520 is closed again.

Then, as the first check valve 520 is closed, the movement of the fluid from the closed space 430 to the accommodation space 530 is stopped.

In this way, the pressure of the fluid in the closed space 430 is prevented or suppressed from becoming higher than the predetermined pressure.

Here, in order to prevent or prevent the flow of fluid between the valve body 400 and the buffer part 500, a buffer o-ring 420 may be further included as follows.

That is, by positioning the buffering ring 420 between the valve body 400 and the buffering part 500, the buffering o-ring (not shown) is installed to prevent the fluid from flowing out to the outside when the fluid moves from the closed space 430 to the receiving space 530 420).

The buffer part 500 further includes a second check valve 540 for interrupting fluid movement from the accommodation space 530 provided in the container 510 of the buffer part 500 to the closed space 430 .

The buffering part 500 is provided with a first removing part for communicating from the accommodation space 545 to the closed space 430 in order to lower the fluid pressure in the closed space 430 when the fluid contained in the accommodation space 530 reaches a predetermined pressure or more, A hole 545 is provided.

When the pressure of the fluid contained in the accommodation space 530 reaches a predetermined pressure, the fluid flows into the closed space 430 through the first removal hole 545. The second check valve 540 may be provided in the first removing hole 545 so that the fluid may flow only in one direction according to the pressure of the fluid accommodated in the accommodating space 530. [

The second check valve 540 interrupts the movement of the fluid from the accommodation space 530 to the closed space 430 through the first removal hole 545.

The second check valve 540 includes a cushioning ball 541 and an intermittent spring 543. Here, the cushioning ball 541 prevents the movement of the fluid. The intermittent spring 543 provides an elastic force so that the buffer ball 541 can control the movement of the fluid. The second check valve 540 thus configured is capable of moving (flowing) fluid only in one direction.

That is, the second check valve 540 is opened when the fluid pressure accumulated in the accommodation space 530 gradually accumulates to a predetermined pressure. In other words, when the pressure in the accommodation space 530 is increased, the fluid pushes the cushioning ball 541 of the second check valve 540. At this time, since the pressure in the accommodation space 530 is high, It is possible to overcome the elastic force of

When the cushioning ball 541 is pushed to overcome the elastic force of the intermittent spring 543, the fluid can flow into the closed space 430 through the first removing hole 545. That is, the flow path of the first removal hole 545 is opened.

When the flow path of the first removal hole 545 is opened, that is, when the second check valve 540 is opened, the pressure of the fluid in the accommodation space 530 drops, The fluid flows into the closed space 430 through the first removing hole 545 and the second check valve 540. When the pressure of the fluid in the accommodation space 530 drops (that is, the pressure of the fluid becomes lower than the predetermined pressure), the second check valve 540 is closed again.

As the second check valve 540 is closed, the movement of the fluid from the accommodation space 530 to the closed space 430 is stopped.

In this way, the pressure of the fluid contained in the accommodation space 530 can be prevented or suppressed from becoming higher than a predetermined pressure.

Next, a safety ball valve according to a modified embodiment of the present invention will be described.

3 is a cross-sectional view schematically showing a safety ball valve according to a modified embodiment of the present invention.

3, a safety ball valve according to a modified embodiment of the present invention includes an intermittent part 100, a sealing member 200, a retainer 300, a valve body 400, and a buffer part 500 . Here, the intermittent part 100, the sealing member 200, and the retainer 300 are not greatly different from those in the above-described embodiment, and thus a detailed description thereof will be omitted.

The valve body 400 and the buffer part 500 in the modified embodiment according to the present invention are basically the same as the above-described example, but there are some modified parts. Therefore, some modified parts will be mainly described with reference to FIG.

The valve body 400 basically comprises a ball 110, a sealing member 200, or a retainer 300 (not shown) so that an external pipe (not shown) can communicate with a flow path formed in the intermittent part 100, ). End connections 440 and 441 which can be fastened to an external pipe are fastened to both ends of the valve body 400 and an external pipe is fastened to the end connections 400 and 441, So that the fluid flowing out of the pipe of the other end passes through the valve so as to flow to an external pipe connected to the end connection 441 on the other side.

As a partially modified portion in the modified embodiment according to the present invention, the portions different from those in the above-described embodiment are the second removal hole 555 and the third check valve 550.

The second removal hole 555 is provided in the end connection 441 which is fastened to the other side of the buffer part 500 and the valve body 400 or the valve body 440. In other words, the second removal hole 555 is formed so as to communicate with the end connection 441 fastened to the other side of the valve body 400 from the accommodation space 530 of the buffer part 500 through the valve body 400 The buffering part 500, the valve body 400 or the end connection 441. [

For reference, it is also possible to use a removal pipe (not shown) communicating between an external pipe (not shown) and a buffer part 500, which is fastened to the other side of the valve body 400, ) And a valve may be provided.

The second removal hole 555 provides communication between the accommodation space 530 in the container 510 and the end connection provided on the other side of the valve body 400. The third check valve 550 is disposed between the end connection 441 or the outer tube connected to the other side of the valve body 400 through the second removal hole 555, Control the movement.

When the second removing hole 555 and the third check valve 550 are provided as described above, the fluid accumulated in the accommodating space 530 of the buffering part 500 can be reliably discharged, To the outside of the pipe through the end connection 441 fastened to the end connection 441.

As described above, according to the safety ball valve of the present invention, the fluid flowing out from the seat ring on one side of the ball valve to the closed space 430 can be taken out to the buffer part 500, It is possible to prevent or prevent the valve from being raised to such an extent as to overstress the valve.

Therefore, there is an effect of suppressing the shortening of the service life of the ball valve due to the pressure increase in the closed space 430.

In addition, since the poisonous fluid is prevented from leaking to the outside by preventing breakage of the ball valve due to an increase in the pressure in the closed space 430, safety of the ball valve is greatly improved.

In addition, since the fluid contained in the accommodation space 530 can be discharged to an external pipe connected to the other side of the ball valve, the ball valve can be easily managed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the scope of the present invention is to be construed as being limited only by the embodiments, and the scope of the present invention should be understood as the following claims and their equivalents.

100: intermittent part 110: ball
120: stem 200: sealing member
300: retainer 400: valve body
440: Outer pipe on one side of the valve body 441: Outer pipe on the other side of the valve body
500: buffer 510: container
520: first check valve 521: buffer ball
523: intermittent spring 530: accommodation space
540: second check valve 550: third check valve

Claims (11)

An intermittent portion for interrupting the movement of the fluid flowing along the flow path formed from one side to the other side;
A sealing member sealing the fluid such that the fluid does not flow out between the flow path and the intermittent portion;
A retainer for supporting the sealing member so that the sealing member can be sealed in contact with the intermittent portion;
A valve body having the intermittent portion, the sealing member, or the retainer so that the flow path formed in the intermittent portion can communicate with an external pipe, and can be directly or indirectly fastened to an external pipe; And
And a cushioning part coupled to the valve body and formed at a position deviated from the flow path to attenuate or relieve pressure caused by the fluid flowing into the closed space formed between the valve body, the intermittent part or the sealing member, ,
The buffering portion
A container provided with a receiving space for receiving the fluid flowing into the closed space; And
And a first check valve for interrupting the movement of the fluid from the closed space to the accommodation space provided in the container,
In the buffer,
And a buffer hole communicating the enclosed space with the accommodating space to accommodate the fluid flowing into the enclosed space,
Wherein when the pressure of the fluid flowing into the sealed space reaches a predetermined pressure, the fluid in the sealed space flows into the containing space through the buffer hole. delete delete The method according to claim 1,
An O-ring disposed between the valve body and the buffer to seal the valve body; Further comprising: a second ball valve (20); An intermittent portion for interrupting the movement of the fluid flowing along the flow path formed from one side to the other side;
A sealing member sealing the fluid such that the fluid does not flow out between the flow path and the intermittent portion;
A retainer for supporting the sealing member so that the sealing member can be sealed in contact with the intermittent portion;
A valve body having the intermittent portion, the sealing member, or the retainer so that the flow path formed in the intermittent portion can communicate with an external pipe, and can be directly or indirectly fastened to an external pipe; And
And a cushioning portion coupled to the valve body and formed at a position deviated from the flow path to attenuate or relieve a pressure caused by the fluid flowing into the closed space formed between the valve body, the intermittent portion, and the sealing member, ,
The buffering portion
A container provided with a receiving space for receiving the fluid flowing into the closed space;
A first check valve for controlling the movement of the fluid from the closed space to the containing space provided in the container; And
A second check valve for interrupting fluid movement from the containing space provided in the container to the enclosed space; Wherein the valve body comprises a valve body. An intermittent portion for interrupting the movement of the fluid flowing along the flow path formed from one side to the other side;
A sealing member sealing the fluid such that the fluid does not flow out between the flow path and the intermittent portion;
A retainer for supporting the sealing member so that the sealing member can be sealed in contact with the intermittent portion;
A valve body having the intermittent portion, the sealing member, or the retainer so that the flow path formed in the intermittent portion can communicate with an external pipe, and can be directly or indirectly fastened to an external pipe; And
And a cushioning part coupled to the valve body and formed at a position deviated from the flow path to attenuate or relieve pressure caused by the fluid flowing into the closed space formed between the valve body, the intermittent part or the sealing member, ,
The buffering portion
A container provided with a receiving space for receiving the fluid flowing into the closed space;
A first check valve for controlling the movement of the fluid from the closed space to the containing space provided in the container; And
A removal hole for communicating between the accommodating space inside the container and the outer tube is provided,
And a third check valve for controlling the movement of the fluid accommodated in the accommodation space to the external pipe through the removal hole. 7. The method according to any one of claims 1, 5 and 6,
Wherein the first check valve comprises:
A cushioning ball to prevent movement of the fluid; And
An intermittent spring for providing an elastic force so that the cushioning ball can intercept the movement of the fluid; Wherein the safety ball valve comprises: 7. The method according to any one of claims 1, 5 and 6,
The intermittent-
A ball penetrating from one side to the other to form a flow path; And
And a stem coupled to an upper side of the ball and serving as a rotation center axis of the ball. 9. The method of claim 8,
Further comprising graphite as a ring type sealing member positioned between the stem and the valve body. 7. The method according to any one of claims 1, 5 and 6,
Further comprising an annular leaf spring for providing an elastic force so that the retainer can be pressed with a predetermined force by the sealing member. 7. The method according to any one of claims 1, 5 and 6,
Wherein the sealing member is a seat-ring.

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