KR101851753B1 - Safety ball valve - Google Patents

Abstract

The present invention relates to a ball valve which is provided with an input side hydraulic pressure of a ball valve through which a high-pressure fluid passes, through a shuttle valve to the interior of a valve housing and a ball member, To a safety ball valve whose structure is improved so as to be able to rotate the ball member with a small force by canceling the surface pressure.

Description

SAFETY BALL VALVE [0001]

The present invention relates to a safety ball valve, and more particularly, to a safety ball valve that supplies an input side hydraulic pressure of a ball valve through which a high-pressure fluid passes, into an interior of a valve housing and a ball member through a shuttle valve, And more particularly to a safety ball valve in which the structure of the ball valve is improved so as to be able to rotate the ball member with a small force by canceling the surface pressure acting on the ball seat side.

In general, a valve is a mechanical element for interrupting a fluid flow on a pipeline. A ball valve rotates a ball type valve at a right angle or a division angle to a linear flow path to open or close the flow path or change the direction.

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, a ball valve disclosed in Korean Patent Laid-open No. 10-2014-0002317 (published on Apr. 2014, 2014) is a ball valve having a trunnion- A cap fixed to both right and left sides of the valve body; a valve stem vertically installed in the valve body; a ball connected to an end of the valve stem; Wherein the sealing means comprises a wedge-shaped pressure gasket to be fitted to the boundary between the seat ring and the cap, and a sealing ring for sealing the seat ring to the seat ring, And a ring-shaped leaf spring having one end in contact with the seat ring and the other end in contact with the cap so as to receive an elastic force toward the ball.

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.

Other prior art related to conventional ball valves is disclosed in Korean Patent Publication No. 10-1586724 entitled " Ball Valve with Accumulator "(Registered on Jan. 01, 2016), the body being fastened to the outer 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 for selectively opening and closing the flow path; And an accumulator disposed 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. In the lower stem, And the protrusion is formed with a connection hole connected to the inflow / outflow hole.

However, as shown in FIG. 1, the inlet port 110 and the outlet port 120 are blocked so that the hollow of the ball member 300 is perpendicular to the fluid flow direction. Pressure hydraulic pressure is transmitted to the ball member 300 side through the inlet 110 side when the first ball seat 210A is disposed and the adapter member 150 is operated on the combined inlet 110 side The frictional surface pressure B is generated on the contact surface where the ball member 300 and the first and second ball seats 210A and 210B are brought into contact with each other by the hydraulic pressure A, A handle having a function of a lever may be employed for rotating the connecting member 410 and the handle member 420. However, it is difficult to apply the handle to the surrounding piping equipment, (420), a large torque value is required for the rotation, It has the disadvantage of increasing the injury factors such as corruption.

In addition, there is a fear that the first ball seat on the inlet side is damaged due to the flow of the fluid due to the difference between the pressure transmitted from the inlet port side and the pressure difference between the outlet side and the ball valve when the ball valve starts to rotate.

Korean Patent Laid-Open No. 10-2014-0002317 "Ball Valve" (Open date: 2014.01.08) Korean Registered Patent No. 10-1586724 entitled "Ball Valve with Accumulator" (registered on January 13, 2016)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to provide a ball valve for an internal combustion engine in which an input side hydraulic pressure of a ball valve through which a fluid of high pressure passes is supplied to the inside of a valve housing and a ball member through a shuttle valve, And the ball member can be rotated with a small force by canceling the surface pressure acting on the ball seat side in accordance with the hydraulic pressure transmitted from the input side during the rotation operation of the ball valve.

According to an aspect of the present invention, there is provided a valve housing including a valve housing having an inlet formed on one side thereof and an outlet formed on the other side thereof and having a coupling hole for receiving a coupling member thereon; And a through hole communicating with the hollow is formed on the other side of the outer periphery of the ball member. The ball member has one end connected to the inlet port side, the other end connected to the outlet port side, And a shuttle valve which is accommodated in the auxiliary passage and supplies the fluid to the accommodation portion and the hollow of the ball member through the inflow passage in accordance with the hydraulic pressure difference between the inlet side and the outlet side .

Wherein the shuttle valve includes a guide plug disposed on an auxiliary flow path side connected to the inlet port side for guiding the flow of the fluid, a first piston member disposed on an end side of the guide plug for opening and closing a fluid flow, A second piston member which is disposed on the side of the auxiliary flow path and opens and closes the fluid flow, and a spring member which is interposed between the first and second piston members and applies elastic force to the left and right first and second piston members Respectively.

The shuttle valve further includes an input side opening / closing port for opening / closing a first flow path connecting the inlet side and the auxiliary flow path, and an output side opening / closing port for opening / closing a second flow path connecting the outlet side and the auxiliary flow path.

Wherein the input side access port comprises a first opening / closing ball disposed on an end side of the first flow path, a first opening / closing shaft brought into contact with the valve housing to support the first opening / closing ball upward, Wherein the first opening and closing shaft is lowered when the first opening and closing lever is rotated in the other direction so that the first opening and closing ball is in contact with the end of the first flow path, So that the first flow path is opened.

Wherein the output opening and closing port includes a second opening / closing ball disposed on an end side of the second flow path, a second opening / closing shaft contacting and supporting the second opening / closing ball on the upper side, Wherein the second opening and closing shaft is lowered when the second opening and closing lever is rotated in the other direction so that the second opening and closing ball moves from the end of the second flow path to the second opening and closing lever So that the second flow path is opened.

In the present invention, when a pressure difference occurs between the inlet port side and the outlet port side, the flow path in which the larger pressure is generated among the first and second flow paths is opened and the fluid flows into the receiving portion through the auxiliary flow path and the inflow path through the shuttle valve , The frictional force between the first ball seat at the inlet side and the ball member is canceled by the fluid filled in the hollow and the accommodating portion when the hollow of the ball member is rotated to coincide with the flow direction of the fluid by using the handle member and the connecting member, And the rotation is smoothly performed.

In addition, according to the present invention, as the fluid that flows into the receiving portion through the inflow path flows into the hollow portion of the ball member as well as the receiving portion and is filled, the existing ball member is transmitted from the inlet side when the ball valve is opened, The first ball seat on the inlet side is prevented from being damaged due to the flow of the fluid due to the pressure difference between the pressure and the outlet side, and the durability of the ball seat can be improved.

1 is a schematic view showing a state in which a surface pressure is generated in a second ball seat when hydraulic pressure is applied in a state where a hollow of a conventional ball valve is closed;
2 is a perspective view illustrating a configuration of a safety ball valve according to the present invention.
3 is an exploded perspective view of Fig.
4A and 4B are views showing a state in which the ball valve is opened or closed according to the hollow angle of the ball member.
5A and 5B are a front view and a side view of the shuttle valve of the present invention.
6A and 6B are a front view and a side view showing a state in which a first flow path is opened and a fluid flows into a shuttle valve side and a fluid flows to a receiving side through an auxiliary flow path.
7 is a use state showing a state in which the second flow path of the present invention is opened and fluid flows into the receiving portion through the shuttle valve.

2 to 7, the safety ball valve according to the present invention includes an inlet 110 formed at one side thereof, an outlet 120 formed at the other side thereof, and a coupling hole for inserting the coupling member 410 at the upper side thereof. An insertion groove 310 in which a hollow 305 is formed at the center and which is received in a receiving portion 105 of the valve housing 100 and in which the connecting member 410 is fitted, And a through hole (320) communicating with the hollow (305) is formed on the other side of the outer periphery of the outer periphery of the hollow member (300). The ball member (300) has one end connected to the inlet (110) An auxiliary flow path 600 connected to the receiving portion 105 in which the ball member 300 is accommodated and an auxiliary flow path 600 accommodated in the auxiliary flow path 600 and connected to the inflow path 600 according to the hydraulic pressure difference between the inlet 110 and the outlet 120 And a shuttle valve 500 for supplying the fluid into the hollow portion 305 of the ball member 300 and the receiving portion 105 through the guide portion 630.

The valve housing 100 has an inlet 110 for introducing fluid into one side thereof and an outlet 120 for discharging fluid to the other side thereof.

The valve housing 100 has a receiving portion 105 having a space for accommodating the ball member 300 therein and a coupling hole communicating with the receiving portion 105 is formed on the upper side.

One end of the coupling member 410 is inserted into the fitting groove 310 of the ball member 300 and inserted into the coupling member 410 to be engaged with the ball member 300.

The connecting member 410 has a rectangular cross-sectional structure such that one end thereof is inserted into the fitting groove 310 to rotate the ball member 300 and the other end is fitted to the handle member 420 to transmit a rotation torque. .

The handle member 420 has a function of transmitting the rotational torque to the connecting member 410 when the other end of the connecting member 410 is fitted to one end of the handle member 420.

The valve housing 100 is formed with an inflow path 630 through which the accommodating portion 105 and the auxiliary flow path 600 are connected.

As shown in FIG. 3, the first and second ball sheets 210A and 210B are disposed in the accommodating portion 105 to be in contact with the left and right sides of the ball member 300, respectively.

An adapter member 150 for coupling with the piping is disposed on the inlet 110 side of the valve housing 100.

A pressure reducing valve is coupled to the outside of the valve housing 100.

 The auxiliary flow path 600 has a structure in which a first flow path 610 is connected to the inlet 110 side and a second flow path 620 is connected to the outlet port 120 side.

An accumulator (not shown) may be connected to the outlet 120 of the present invention to provide a canceling force to the pressure load generated in the piping system.

The ball member 300 is formed with a hollow 305 communicating with the outside at the center thereof and has a fitting groove 310 having a concave shape for fitting the connecting member 410 on the upper side, 105 and the through holes 320 are formed to allow the fluid to flow into the hollow 305.

The rotation of the handle member 420 is transmitted to the ball member 300 through the connecting member 410 so that the ball member 300 is rotated in the receiving portion 105. The rotation of the ball member 300 When the temporal hollow 305 is rotated at an angle of 90 ° with respect to the flow direction of the fluid flowing through the inlet 110 as shown in FIGS. 4A and 4B, the inlet 110 side and the outlet 120 are rotated, And the outer circumferential surface of the ball member 300 is closely attached to the first and second ball sheets 210A and 210B disposed on the side of the first and second ball members 210A and 210B.

5A and 5B, the shuttle valve 500 includes a guide plug 550 disposed on the side of the auxiliary flow path 600 connected to the inlet 110 and guiding the flow of the fluid in the direction of 90 °, A first piston member 510 disposed on an end side of the guide plug 550 to open and close a fluid flow and a second piston member 510 disposed on a side of the auxiliary flow path 600 connected to the outlet port 120, And a spring member 530 interposed between the first and second piston members 510 and 520 to apply an elastic force to the first and second piston members 510 and 520 on the left and right sides, .

A sealant 540 is disposed between the end of the guide plug 550 and the first piston member 510 and between the second flow path 620 and the second piston member 520 respectively.

The spring member 530 is disposed between the first and second piston members 510 and 520 so as to push out the first and second piston members 510 and 520 in both outward directions, And closes the first and second flow paths 610 and 620 when there is no pressure difference between the first and second flow paths.

On the contrary, when the fluid pressure difference between the inlet 110 side and the outlet 120 side occurs, the spring member 530 is contracted, and the flow path of the first and second flow paths 610 and 620, The fluid flows into the accommodating portion 105 through the inside of the flow path 600.

The shuttle valve 500 includes an input side opening and closing port 710 for opening and closing a first flow path 610 connecting the inlet 110 side and the auxiliary flow path 600, And an output side opening / closing port 720 for opening / closing the second flow path 620 connecting the output side opening /

The input side opening / closing port 710 includes a first opening / closing ball 712 disposed on an end side of the first flow path 610, a second opening / closing ball 712 contacting the first opening / closing ball 712 to support the first opening / A first opening and closing shaft 714 fastened to the valve housing 100 and a first opening and closing lever 716 extending from an end of the first opening and closing shaft 714 and projecting to the outside of the valve housing 100 Closing shaft 714 is lowered so that the first opening and closing ball 712 is separated from the end of the first flow path 610 while the first opening and closing lever 716 is rotated in the other direction, The flow path 610 is opened.

The output side door 720 includes a second opening / closing ball 722 disposed on an end side of the second flow path 620, a second opening / closing ball 722 contacting the second opening / closing ball 722 to support the upper side, A second opening and closing shaft 724 coupled to the valve housing 100 and a second opening and closing lever 726 extending from an end of the second opening and closing shaft 724 and protruding from the valve housing 100 Closing shaft 724 is lowered so that the second opening and closing ball 722 is separated from the end of the second flow path 620 while the second opening and closing lever 726 is rotated in the other direction, (620) is opened.

4A, when the hollow 305 of the ball member 300 is positioned in the same direction as the flow of the fluid flowing through the inlet 110 side, the fluid flows through the hollow 305 To the outlet 120 side.

After the supply of the fluid is completed, the operator rotates the handle member 420 to transmit the rotation torque to the ball member 300 through the connecting member 410 to rotate the ball member 300 at an angle of 90 ° The hollow 305 of the ball member 300 is positioned in a direction orthogonal to the fluid flow direction so that the outer circumferential edge of the ball member 300 is in contact with the first and second balls Thereby sealing the inlet 110 and the outlet 120 while contacting the sheets 210A and 210B.

6A and 6B, when a pressure difference occurs between the inlet 110 and the outlet 120 in the closed state by the ball member 300 and a larger pressure is generated on the inlet 110 side, The high pressure fluid acting on the first flow path 610 side connected to the inlet 110 side flows into the auxiliary flow path 600 side through the guide plug 550 and the first piston member 510 The first passage 610 and the auxiliary passage 600 are communicated with each other by the movement of the first piston member 510 so that the high pressure fluid flows into the auxiliary passage 600, ≪ / RTI >

Subsequently, the fluid in the auxiliary flow path 600 flows into the receiving portion 105 through the inflow path 630, and the fluid is filled in the hollow 305 of the ball member 300 through the through hole 320.

On the other hand, when a pressure difference is generated between the inlet 110 and the outlet 120 in the closed state by the ball member 300 and a larger pressure is generated on the outlet 120 side, Likewise, the high-pressure fluid acting on the second flow path 620 side connected to the outlet port 120 pushes the second piston member 520 to the left to contract the spring member 530, and the second piston member The second flow path 620 and the auxiliary flow path 600 communicate with each other and the high pressure fluid flows into the auxiliary flow path 600.

The fluid in the auxiliary flow path 600 flowing through the outlet 120 flows into the receiving portion 105 through the inflow path 630 and the fluid is filled in the hollow 305 of the ball member 300 do.

When the pressure difference between the inlet 110 and the outlet 120 is released, the first and second piston members 510 and 520 are returned to their original positions by the restoring force of the spring member 530, , The two flow paths 610 and 620 are closed, and the shuttle valve 500 is closed.

When the shuttle valve 500 is further provided with the input side opening and closing port 710 and the output side opening and closing port 720, the operator rotates the first and second opening and closing levers 716 and 726 to rotate the first and second opening and closing balls 712 and 722 The first and second flow paths 610 and 620 can be selectively opened and closed by being selectively in close contact with the first flow path 610 and the second flow path 620.

At this time, when the first and second open / close levers 716 and 726 are rotated in one direction, the first and second open / close shafts 714 and 724 fastened to the valve housing 100 are moved up The first and second openable and closable balls 712 and 722 can be brought into close contact with the first and second flow channels 610 and 620 to close the first and second flow channels 610 and 620. On the other hand, The first and second opening and closing shafts 714 and 724 are lowered to remove the force to close the first and second opening and closing balls 712 and 722 to the ends of the first and second flow paths 610 and 620, The first and second opening and closing balls 712 and 722 are separated from the ends of the first and second flow paths 610 and 620 and the fluid flows into the auxiliary flow path 600 to open the shuttle valve 500.

Accordingly, when a pressure difference occurs between the inlet 110 and the outlet 120, the first and second flow paths 610 and 620 are opened through the shuttle valve 500 The hollow 305 of the ball member 300 can be separated from the fluid 305 by using the handle member 420 and the connecting member 410 because the fluid flows into the receiving portion 105 through the flow path 600 and the inflow path 630. [ The pressure of the fluid flowing into the receiving portion 105 through the inlet 110 due to the fluid filled in the hollow 305 and the receiving portion 105 is canceled and the pressure of the first ball seat 210A The rotation of the ball member 300 can be smoothly performed.

The hydraulic pressure introduced into the accommodating portion 105 through the inflow path 630 acts not only on the hollow 305 of the ball member 300 but also on the first ball seat 210A side, So that the surface pressure acting on the ball member 300 and the first ball seat 210A side is canceled by the transmitted hydraulic pressure so that the ball member 300 is smoothly rotated

100: valve housing 105: accommodating portion
110: inlet 120: outlet
150: adapter member 210A, 210B: first and second ball seat
300: Ball member 305: hollow
310: fitting groove 320: through hole
410: connecting member 420: handle member
500: shuttle valve 510: first piston member
520: second piston member 530: spring member
540: sealing material 550: guide plug
600: Auxiliary flow path 610,620: 1st and 2nd flow path
630: Inflow path 710: Input side opening / closing port
720: output side opening / closing port 712, 722:
714,724: first and second open / close shafts 716 and 726:

Claims (5)

A valve housing 100 in which an inlet 110 is formed at one side and an outlet 120 is formed at the other side and a coupling hole into which the coupling member 410 is inserted is formed,
A hollow 305 is formed at the center of the valve housing 100 of the valve housing 100 and a fitting groove 310 for fitting the connecting member 410 is formed at one side of the outer periphery of the valve housing 100, A ball member 300 having a through hole 320 communicating with the hollow 305,
An auxiliary flow path 600 having one end connected to the inlet 110 side and the other end connected to the outlet 120 side and connected to the receiving portion 105 accommodating the ball member 300,
And is accommodated in the auxiliary passage 600 and flows into the hollow portion 305 of the receiving portion 105 and the ball member 300 through the inflow passage 630 in accordance with the hydraulic pressure difference between the inlet 110 and the outlet 120 And a shuttle valve (500) for supplying the fluid. The method according to claim 1,
The shuttle valve 500 includes a guide plug 550 disposed on the side of the auxiliary flow path 600 connected to the inlet 110 and guiding the flow of the fluid,
A first piston member 510 disposed on an end side of the guide plug 550 to open and close a fluid flow,
A second piston member 520 disposed on the side of the auxiliary flow path 600 connected to the outlet 120 to open and close the fluid flow,
And a spring member (530) interposed between the first and second piston members (510, 520) to apply an elastic force to the first and second piston members (510, 520) on the left and right sides. The method according to claim 1,
The shuttle valve 500 includes an input side opening / closing port 710 for opening / closing a first flow path 610 connecting the inlet 110 side and the auxiliary flow path 600,
And an output side opening / closing port (720) for opening / closing a second flow path (620) connecting the outlet (120) side and the auxiliary flow path (600). The method of claim 3,
The input side opening / closing port 710 includes a first opening / closing ball 712 disposed on an end side of the first flow path 610,
A first opening / closing shaft 714 which is in contact with the valve housing 100 to support the first opening / closing ball 712 upward,
Closing shaft 714 and a first opening / closing lever 716 protruding outward from the valve housing 100,
The first opening and closing shaft 714 is lowered so that the first opening and closing ball 712 is separated from the end of the first flow path 610 while the first opening and closing lever 716 is rotated in the other direction, 610) is opened. The method of claim 3,
The output side opening / closing port 720 includes a second opening / closing ball 722 disposed on an end side of the second flow path 620,
A second opening / closing shaft 724 which is in contact with the valve housing 100 to support the second opening / closing ball 722 upward,
Closing shaft 724 and a second opening / closing lever 726 protruding outward from the valve housing 100,
The second opening and closing shaft 724 is lowered and the second opening and closing ball 722 is separated from the end of the second flow path 620 while the second opening and closing lever 726 is rotated in the other direction, Is opened.

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