JPH10132116A - Regulating valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent noise and vibration due to flow disturbance of fluid by forming a part of inner surface, which forms a flowing-out direction changing chamber for changing the flowing-out direction of fluid flowing from a clearance generated between a plug and a seat ring, into such a streamline shape as to reduce resistance against which fluid flows. SOLUTION: When a diaphragm operating device 15 comes into action and the first and second plugs 10, 11 are moved upwards together with a plug driving rod 15, a clearance is generated between the first and second seat rings 12, 13, and upward and downward flowing-out direction changing chambers 8, 9 and a fluid flowing-in opening 2 are communicated with each other to form a flow passage. The flow of fluid flown into the upward flowing-out direction changing chamber 8 runs downwards along a recessed surface 71 of streamline shape and is sent to the downstream side from the fluid flowing-out opening 3. The flow of fluid flowing into the downward flowing-out direction changing chambers 9 is flown out as flow with high efficiency as a result of the bottom surface of a lower lid 4 formed into a recessed surface of a streamline shape, thus restraining a separation vortex or flow disturbance from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plug that moves on the same axis on which a seat ring is arranged, and closes the seat ring to block a flow path between an upstream side and a downstream side. An adjustment valve that adjusts a gap between the seat ring and the plug to adjust a fluid outflow amount from the upstream side to the downstream side, and in particular, the upstream side through a gap between the seat ring and the plug. The present invention relates to an adjustment valve capable of suppressing turbulence of a flow when a fluid flows out from a side to the downstream side, and suppressing noise and vibration by making the flow of the fluid smooth.

[0002]

2. Description of the Related Art FIG. 11A is a front view showing a cross-sectional configuration of a conventional regulating valve configured as a double-seat valve, and FIG.
Is a side view thereof. In the figure, 1 is a regulating valve main body, 2
Is an upstream fluid inlet, 3 is a downstream fluid outlet, 4 is a lower lid fixed to the regulating valve body 1 by bolts, 5 is an upper lid fixed to the regulating valve body 1 by bolts, and 6 is a regulating valve. A gasket 7 for maintaining water tightness between the main body 1 and the lower lid 4, a gasket 7 for maintaining water tightness and airtightness between the regulating valve main body 1 and the upper lid 5, 8 a fluid outlet 3 The upper outflow diverting chamber 9 communicating with the
The lower outflow direction changing chamber communicating with the first plug 10 is a first plug, and the second outlet 11 is formed integrally with the first plug 10.
The first seat ring 13 is in close contact with the first plug 10 to block the space between the upper outflow direction change chamber 8 and the fluid inflow port 2, and the first seat ring 13 is in close contact with the second plug 11. This is a second seat ring that shuts off between the lower outflow direction changing chamber 9 and the fluid inlet 2. The first seat ring 12 and the second seat ring 13 are respectively fixed to the adjustment valve main body 1 by screws. 14 is the first
The plug upper end formed integrally with the plug 10 and the second plug 11, the plug driving rod 15 connected to the plug upper end 14, and the plug driving rods 15, 1
6 is a diaphragm operating device for vertically moving the first plug 10 and the second plug 11 in the vertical direction;
Reference numeral denotes a scale unit for instructing the amount of vertical movement of the first plug 10 and the second plug 11 by the diaphragm operating unit 16.

Next, the operation will be described. This regulating valve is normally connected to the first plug 10 by a pressing spring (not shown) arranged in the diaphragm operating device 16.
And the second plug 11 is pressed vertically downward, so that the first plug 10 is in close contact with the first seat ring 12 and the second plug 11 is in close contact with the second seat ring 13. Thus, the upper outflow direction changing chamber 8 and the lower outflow direction changing chamber 9 are shut off from the fluid inlet 2. In this state, the diaphragm operating device 16
Operates, a vertically upward force is generated, and together with the plug drive rod 15, the first plug 10 and the second plug 11 are vertically moved upward. As a result, a gap is formed between the first plug 10 and the first seat ring 12 and between the second plug 11 and the second seat ring 13, and the upper outflow direction change chamber 8 and the lower outflow A flow path is formed by communicating between the direction changing chamber 9 and the fluid inlet 2. In this case, the size of the gap generated between the first plug 10 and the first seat ring 12 and between the second plug 11 and the second seat ring 13 can be controlled by the diaphragm operating device 16. Yes, it is flexibly adjusted as the valve opening.

The flow direction of the fluid which rises via the gap formed between the first plug 10 and the first seat ring 12 and flows into the upper outflow direction changing chamber 8 is changed to the upper outflow direction changing chamber. 8, and is sent downward in the upper outflow direction changing chamber 8 from the fluid outlet 3 to the downstream side. On the other hand, the direction of the flow of the fluid flowing into the lower outflow direction changing chamber 9 via the gap generated between the second plug 11 and the second seat ring 13 is changed in the lower outflow direction changing chamber 9 this time. Is directed upward from the fluid outlet 3 to the downstream side.

FIG. 12 is a front view showing a sectional configuration of a conventional regulating valve configured as a single-seat valve. In the figure, 2
1 is an adjustment valve main body, 22 is an upstream fluid inflow port, 23 is a downstream fluid outflow port, 24 is an upper lid fixed to the adjustment valve main body 21 with bolts, 26 is between the adjustment valve main body 21 and the upper lid 24 Gasket for maintaining airtightness and watertightness of
8 is an outflow direction changing chamber communicating with the fluid outlet 23,
Reference numeral 0 denotes a plug, and 31 denotes a seat ring which closes the plug 30 to shut off the space between the outflow direction changing chamber 28 and the fluid inlet 22. The seat ring 31 is fixed to the adjustment valve main body 21 with screws. Reference numeral 34 denotes a plug drive rod connected to the plug 30.

Next, the operation will be described. Also in this adjusting valve, the plug 30 is normally pressed vertically downward by a pressing spring arranged in a diaphragm operating device (not shown). As a result, the plug 30 comes into close contact with the seat ring 31, and The state between the outflow direction changing chamber 28 and the fluid inlet 22 is shut off. In this state,
When the diaphragm operating device operates, an upward force for vertically lifting the plug 30 is generated, and the plug 30 is moved vertically upward together with the plug driving rod 34. As a result, a gap is formed between the plug 30 and the seat ring 31, and the flow path is formed by communicating between the outflow direction changing chamber 28 and the fluid inlet 22. In this case, the size of the gap generated between the plug 30 and the seat ring 31 can be controlled by the diaphragm operating device, and is flexibly adjusted as the valve opening.

[0007] Then, it rises through the gap formed between the plug 30 and the seat ring 31 and rises to the outflow direction changing chamber 28.
The direction of the flow of the fluid flowing into the outflow direction changing chamber 28 changes in the outflow direction changing chamber 28, and the fluid is sent obliquely downward in the outflow direction changing chamber 28 to the downstream side from the fluid outlet 23.

[0008]

Since the conventional regulating valve is configured as described above, the regulating valve configured as a double-seat valve has the first plug 10 and the first seat ring 12.
The fluid that has flowed out of the gap created between the upper outflow direction changing chamber 8 flows into the upper outflow direction changing chamber 8, collides with the bottom surface of the upper lid 5 that forms the upper inner surface of the upper outflow direction changing chamber 8, and the fluid in the upper outflow direction changing chamber 8 The direction of the flow can be changed to the direction of the fluid outlet 3, but at this time, there is a problem that the flow of the fluid is disturbed and noise and vibration are generated.

The fluid that has flowed out of the gap formed between the second plug 11 and the second seat ring 13 flows into the lower outflow direction changing chamber 9 and forms the bottom surface of the lower outflow direction changing chamber 9. The upper and lower lids 4 collide with each other and the direction of fluid flow is changed to the direction of the fluid outlet 3 in the lower outflow direction changing chamber 9. In this case, however, the fluid flow is disturbed and noise and vibration are generated. There was a problem to do.

Further, even in a regulating valve configured as a single-seat valve, the fluid flowing out of the gap formed between the plug 30 and the seat ring 31 flows into the outflow direction changing chamber 28, and the upper inner surface of the outflow direction changing chamber 28 is cleaned. The bottom surface 2 of the upper lid 24 to be constituted
4a, the direction of the flow of the fluid is changed to the direction of the fluid outlet 23 in the outflow direction changing chamber 28, but at this time, there is a problem that the flow of the fluid is disturbed to generate noise and vibration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the direction of the flow of fluid flowing out of a gap formed between a plug and a seat ring can be changed to the direction of a fluid outlet. It is an object of the present invention to provide an adjustment valve capable of preventing noise and vibration due to disturbance of a flow of a fluid generated at the time.

[0012]

According to the first aspect of the present invention, there is provided a regulating valve for forming an outflow direction changing chamber for changing an outflow direction of a fluid flowing through a gap formed between a plug and a seat ring. A part is streamlined to reduce the resistance when the fluid flows.

According to a second aspect of the present invention, in the regulating valve, the bottom surface of the upper lid, which forms a part of the inner surface of the outflow direction changing chamber, is formed as a streamline concave surface for reducing resistance when a fluid flows.

According to a third aspect of the present invention, the bottom surface of the lower lid, which constitutes a part of the inner surface of the outflow direction changing chamber, has a streamline concave surface for reducing resistance when a fluid flows. .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a cross-sectional configuration diagram of a regulating valve according to the first embodiment configured as a double-seat valve. In the figure,
1 is an adjustment valve main body, 2 is an upstream fluid inlet, 3 is a downstream fluid outlet, 4 is a lower lid fixed to the adjustment valve main body 1 by bolts, and 5 is fixed to the adjustment valve main body 1 by bolts. The upper lid 6 is a gasket for maintaining water tightness between the regulating valve body 1 and the lower lid 4, and the reference numeral 7 is a gasket for maintaining water tightness and air tightness between the regulating valve body 1 and the upper lid 5. , 8 are upper outflow direction change chambers communicating with the fluid outlet 3, 9 are lower outflow direction change chambers also communicating with the fluid outlet 3, 10 is a first plug, and 11 is a first plug. A second plug 12 formed integrally with the plug 10 is a first plug 1
The first seat ring 13 that closes between the upper outflow direction change chamber 8 and the fluid inlet 2 by being in close contact with the first plug 11 is in contact with the lower outflow direction change chamber 9 by being in close contact with the second plug 11. It is a second seat ring that shuts off between the inflow port 2. The first seat ring 12 and the second seat ring 13 are respectively fixed to the adjustment valve main body 1 by screws. 14 is a plug upper end formed integrally with the first plug 10 and the second plug 11, 15 is a plug drive rod connected to the plug upper end 14, 16 is the first plug 10 and the second plug Reference numeral 17 denotes a diaphragm operating unit for vertically moving the first and second plugs 11 and 11 by a diaphragm operating unit for moving the first plug 10 and the second plug 11 in the vertical direction. Reference numeral 71 denotes a streamlined concave surface formed on the bottom surface of the upper lid 5 constituting the upper inner surface of the upper outflow direction changing chamber 8. The streamlined concave surface 71 is formed so as to be continuous with the curved surface of the side wall of the upper outflow direction changing chamber 8,
When the flow direction of the fluid flowing out of the gap formed between the plug 10 and the first seat ring 12 is changed to the direction of the fluid outlet 3 along the side wall of the upper outflow direction changing chamber 8. It has continuity with the curved surface constituting the side wall so as to suppress the occurrence of flow disturbance.

Next, the operation will be described. This regulating valve is normally connected to the first plug 10 by a pressing spring (not shown) arranged in the diaphragm operating device 16.
And the second plug 11 is pressed vertically downward, so that the first plug 10 is in close contact with the first seat ring 12 and the second plug 11 is in close contact with the second seat ring 13. Thus, the upper outflow direction changing chamber 8 and the lower outflow direction changing chamber 9 are shut off from the fluid inlet 2. In this state, the diaphragm operating device 16
Operates, a vertically upward force is generated, and together with the plug drive rod 15, the first plug 10 and the second plug 11 are vertically moved upward. As a result, a gap is formed between the first plug 10 and the first seat ring 12 and between the second plug 11 and the second seat ring 13, and the upper outflow direction change chamber 8 and the lower outflow A flow path is formed by communicating between the direction changing chamber 9 and the fluid inlet 2. In this case, the size of the gap generated between the first plug 10 and the first seat ring 12 and between the second plug 11 and the second seat ring 13 can be controlled by the diaphragm operating device 16. Yes, it is flexibly adjusted as the valve opening.

The flow of the fluid that has risen through the gap formed between the first plug 10 and the first seat ring 12 and has flowed into the upper outflow direction changing chamber 8 is increased. Flows along the side wall of the upper surface and further along the streamlined concave surface 71 continuous with the side wall, the direction of the fluid flow is changed in the upper outflow direction changing chamber 8, The fluid is sent downward from the fluid outlet 3 to the downstream side. At this time, since the streamlined concave surface 71 has continuity with the curved surface of the side wall of the upper outflow direction changing chamber 8, the flow direction of the fluid changes in the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow, which are likely to occur when the flow is performed, are suppressed, and an efficient flow is generated.

On the other hand, the flow direction of the fluid flowing into the lower outflow direction changing chamber 9 through the gap formed between the second plug 11 and the second seat ring 13 is changed to the lower outflow direction changing chamber 9. Then, the fluid is directed upward from the fluid outlet 3 to the downstream side. In this case, the bottom surface of the lower lid 4 that constitutes a part of the inner surface of the lower outflow direction changing chamber 9 is formed into a streamline-shaped concave surface 72 that reduces resistance when a fluid flows, similarly to the upper lid 5. As in the case of the upper outflow direction changing chamber 8, the separation vortex and the turbulence of the flow which are likely to occur when the direction of the fluid flow is changed in the lower outflow direction changing chamber 9 are suppressed, and an efficient flow is generated.

Embodiment 2 FIG. 2 shows a configuration in which the first seat ring 12 and the second seat ring 13 of the regulating valve shown in FIG. 1 are integrally formed into one seat ring 51, and the second plug 11 and the seat ring 51. FIG. 4 is a cross-sectional configuration diagram showing a regulating valve having a configuration in which a position at which fluid flows into a lower outflow direction changing chamber from a gap generated between the lower outflow direction changing chamber and the center position of the lower outflow direction changing chamber is eccentric. 2, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the figure, reference numeral 61 denotes the lower outflow direction changing chamber. The seat ring 51 is fixed to the adjustment valve main body 1 by screws, similarly to the first seat ring 12 and the second seat ring 13 of the adjustment valve shown in FIG.

FIG. 3 is a perspective sectional view showing the structure of the seat ring 51 shown in FIG. The seat ring 51 is a first seat ring component 5 that is in close contact with the first plug 10.
1a and a second seat ring component 51b which is in close contact with the second plug 11, and the first seat ring component 51a and the second seat ring component 51b are integrally formed by a cylindrical connecting portion 51c. It is connected and configured.
The connecting portion 51c may be made of the same material as the first seat ring forming portion 51a and the second seat ring forming portion 51b, or may be made of a different material. When the connecting portion 51c is made of the same material, the lathe is used. It is possible to cut out integrally by processing or the like. Reference numeral 51d denotes a gap formed between the first plug 10 and the first seat ring forming part 51a and a gap formed between the first plug 10 and the first seat ring forming part 51a.
b is a hole for guiding to a gap formed between
Is a structure in which one large-diameter hole 51d is formed. In this case, the characteristics of the flow path can be adjusted by changing the diameter, shape, and position of the hole 51d. 51e and 51f are male screw portions for screwing and fixing the seat ring 51 to female screw portions formed on the adjustment valve main body 1 side. Reference numeral 51g denotes a concave portion for turning the seat ring and adjusting the mounting position of the seat ring 51 in the vertical direction with respect to the adjustment valve main body 1.
Is formed on the upper end surface of. The tip of the mounting position adjusting claw inserted from above is engaged with the concave portion 51g, and the mounting position adjusting claw is rotated to rotate the seat ring 51 and adjust the amount by which the seat ring 51 is screwed into the adjusting valve body 1. Then, the mounting position of the seat ring 51 in the vertical direction with respect to the adjustment valve body 1 is adjusted.

In this adjusting valve, when the upper lid 5 is removed from the adjusting valve main body 1, the first plug 10 and the seat ring 51 can be easily checked from above. For this reason, the seat ring 51 is attached to the adjustment valve body 1, the first plug 10 and the second plug 11 and the seat ring 51 are exchanged, and the seat ring 51 and the first plug 10 and the second plug 11 When adjusting the positional relationship between
The upper lid 5 is removed from the adjustment valve body 1, the state where the seat ring 51 is screwed into the adjustment valve body 1 from above is adjusted, and the vertical mounting position of the seat ring 51 with respect to the adjustment valve body 1 is changed. The close contact state between the first plug 10 and the first seat ring forming section 51a and the close contact state between the second plug 11 and the second seat ring forming section 51b can be simultaneously adjusted to the best states. In particular, while the conventional adjustment valve has a configuration in which the first seat ring 12 and the second seat ring 13 are separately configured and attached to the adjustment valve body 1, respectively, in the adjustment valve of this embodiment, Since the first seat ring forming section 51a and the second seat ring forming section 51b are integrally formed, the first seat ring forming section 51a and the second seat ring forming section 51 are formed.
The distance between the first and second seat ring components 51a and 51b is adjusted at the same time by one adjustment operation.

In the embodiment described above, one of the male screw portion 51e and the male screw portion 51f can be omitted, and the adjustment valve main body 1 which is screwed with the omitted male screw portion can be used. It is also possible to omit the female screw portion of this embodiment, and in such a configuration, the manufacture of the seat ring 51 is simplified and facilitated as compared with the case where the male screw portion 51e and the male screw portion 51f are formed. In the embodiment described above, the upper lid 5 is removed from the adjustment valve main body 1 and the seat ring 51 is screwed into the interior of the adjustment valve main body 1 from above, but the lower lid 4 is removed from the adjustment valve main body 1. The seat ring 51 may be screwed into the adjustment valve body 1 from below.

In the regulating valve using such a seat ring 51 as well, it rises through the gap created between the first plug 10 and the first seat ring constituting portion 51a and moves to the upper outflow direction changing chamber 8. The flow of the flowing fluid flows along the side wall of the upper outflow direction changing chamber 8 and further along the streamlined concave surface 71 continuous with the side wall, and the flow direction of the fluid is in the upper outflow direction changing chamber 8. The fluid is then sent downward in the upper outflow direction changing chamber 8 from the fluid outlet 3 to the downstream side. At this time, since the streamlined concave surface 71 has continuity with the curved surface constituting the side wall of the upper outflow direction changing chamber 8, the flow direction of the fluid changes in the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow, which are likely to occur when the flow is performed, are suppressed, and an efficient flow is generated.

On the other hand, the flow direction of the fluid flowing into the lower outflow direction changing chamber 61 via the gap created between the second plug 11 and the second seat ring constituting portion 51b is changed to the lower outflow direction changing chamber. In this case, the fluid is sent upward from the fluid outlet 3 to the downstream side. In this case, the lower outflow direction change chamber 61
By forming the bottom surface of the lower lid 4 constituting a part of the inner surface of the lower surface into a streamline-shaped concave surface 72 for reducing the resistance when the fluid flows similarly to the upper lid 5, the lower surface 4 is formed similarly to the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow which are likely to occur when the direction of the flow of the fluid is changed in the lower outflow direction changing chamber 61 are suppressed, and an efficient flow is generated.

FIG. 4 is a perspective sectional view showing the structure of a seat ring 52 having a form different from that of the seat ring 51.
The structure of the regulating valve is the same as the structure shown in FIG. The seat ring 52 has a first seat ring component 52a that is in close contact with the first plug 10 and a second seat ring component 52b that is in close contact with the second plug 11.
Seat ring component 52a and second seat ring component 5
2b is integrally connected by a cylindrical connecting portion 52c. The connecting portion 52c may be made of the same material as the first seat ring forming portion 52a and the second seat ring forming portion 52b, or may be made of a different material. It is possible to cut out integrally by processing or the like.
Reference numeral 52d denotes a gap formed between the first plug 10 and the first seat ring component 52a and a gap formed between the first plug 10 and the first seat ring component 52a, and the second plug 11 and the second seat ring component 52b. And a plurality of holes for guiding to a gap formed between the holes. And this hole 52d
Has a function as a diffuser. 52e and 52f are male screw portions for screwing and fixing the seat ring 52 to female screw portions formed on the adjustment valve main body 1 side. Reference numeral 52g denotes a recess for turning the seat ring 52 to adjust the mounting position of the seat ring 52 in the vertical direction with respect to the adjustment valve main body 1, and is formed on the upper end surface of the seat ring 52. The distal end of the mounting position adjusting claw inserted from above is engaged with the concave portion 52g, and the mounting position adjusting claw is rotated to rotate the seat ring 52 so that the seat ring 52 is rotated.
Adjusts the amount by which the seat ring 52 is screwed into the adjustment valve main body 1, and adjusts the vertical mounting position of the seat ring 52 with respect to the adjustment valve main body 1.

In this adjusting valve, when the upper lid 5 is removed from the adjusting valve main body 1, the first plug 10 and the seat ring 52 can be easily checked from above. For this reason, the seat ring 52 is attached to the regulating valve body 1, the first plug 10 and the second plug 11 and the seat ring 52 are exchanged, and the seat ring 52 and the first plug 10 and the second plug 11 When adjusting the positional relationship between
The upper lid 5 is removed from the adjustment valve main body 1, and the seat ring 5 is removed.
2 is screwed into the adjustment valve main body 1 from above, the vertical mounting position of the seat ring 52 with respect to the adjustment valve main body 1 is changed, and the first plug 10 and the first seat ring forming portion 52a are connected to each other. And the close contact state between the second plug 11 and the second seat ring component 52b can be simultaneously adjusted to the best state. In the regulating valve of this embodiment, the first seat ring forming section 52a and the second seat ring forming section 52b are integrally formed, so that the first seat ring forming section 52a and the second seat ring forming section 52b are Is constant, and the first seat ring forming part 52a and the second seat ring forming part 52b are simultaneously adjusted by one adjustment operation. Also,
Since a plurality of holes 52d functioning as a diffuser are formed in the connecting portion 52c connecting the first seat ring forming portion 52a and the second seat ring forming portion 52b, the fluid flowing from the upstream side by the plurality of holes 52d is provided. Kinetic energy is converted into pressure energy, and the flow of fluid flowing downstream through the gap between the seat ring and the plug can be smoothened.

In the embodiment described above, one of the male screw part 52e and the male screw part 52f can be omitted, and the adjustment valve main body 1 which is screwed with the omitted male screw part can be omitted. It is also possible to omit the internal thread portion of the seat ring 52. With such a configuration, the manufacture of the seat ring 52 is simplified and facilitated as compared with the case where the external thread portion 52e and the external thread portion 52f are formed. Further, in the embodiment described above, the upper lid 5 is removed from the adjustment valve main body 1 and the seat ring 52 is screwed into the adjustment valve main body 1 from above, but the lower lid 4 is removed from the adjustment valve main body 1. The seat ring 52 may be screwed into the adjustment valve body 1 from below.

In the regulating valve using such a seat ring 52 as well, it rises via the gap formed between the first plug 10 and the first seat ring constituting portion 52a and moves to the upper outflow direction changing chamber 8. The flow of the flowing fluid flows along the side wall of the upper outflow direction changing chamber 8 and further along the streamlined concave surface 71 continuous with the side wall, and the flow direction of the fluid is in the upper outflow direction changing chamber 8. The fluid is then sent downward in the upper outflow direction changing chamber 8 from the fluid outlet 3 to the downstream side. At this time, since the streamlined concave surface 71 has continuity with the curved surface constituting the side wall of the upper outflow direction changing chamber 8, the flow direction of the fluid changes in the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow, which are likely to occur when the flow is performed, are suppressed, and an efficient flow is generated.

On the other hand, the flow direction of the fluid flowing into the lower outflow direction changing chamber 61 through the gap formed between the second plug 11 and the second seat ring constituting portion 52b is the lower outflow direction changing chamber. In this case, the fluid is sent upward from the fluid outlet 3 to the downstream side. In this case, the lower outflow direction change chamber 61
By forming the bottom surface of the lower lid 4 constituting a part of the inner surface of the lower surface into a streamline-shaped concave surface 72 for reducing the resistance when the fluid flows similarly to the upper lid 5, the lower surface 4 is formed similarly to the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow which are likely to occur when the direction of the flow of the fluid is changed in the lower outflow direction changing chamber 61 are suppressed, and an efficient flow is generated.

FIG. 5 is a perspective sectional view showing the structure of a seat ring 53 having a different form from the seat ring 51.
The structure of the regulating valve is the same as the structure shown in FIG. The seat ring 53 has a first seat ring component 53a that is in close contact with the first plug 10 and a second seat ring component 53b that is in close contact with the second plug 11.
Seat ring component 53a and second seat ring component 5
3b is integrally connected by a connecting portion 53c. The connecting portion 53c may be made of the same material as the first seat ring forming portion 53a and the second seat ring forming portion 53b, or may be made of a different material. It is possible to cut out integrally by processing or the like. Reference numeral 53d designates a gap formed between the first plug 10 and the first seat ring forming part 53a and a gap formed between the first plug 10 and the first seat ring forming part 53a, and the second plug 11 and the second seat ring forming part 53b. And a flow guide hole for leading to a gap formed between 53e and 53f are male screw portions for screwing and fixing the seat ring 53 to female screw portions formed on the adjustment valve main body 1 side. 53g is a recess for turning the seat ring 53 to adjust the mounting position of the seat ring 53 in the vertical direction with respect to the adjustment valve main body 1.
Is formed on the upper end surface of. The distal end of the mounting position adjusting claw inserted from above is engaged with the concave portion 53g, and the mounting position adjusting claw is rotated to rotate the seat ring 53 and adjust the amount by which the seat ring 53 is screwed into the adjustment valve body 1. Then, the mounting position of the seat ring 53 in the vertical direction with respect to the adjustment valve body 1 is adjusted.

Also in this adjusting valve, when the upper lid 5 is removed from the adjusting valve body 1, the first plug 10 and the seat ring 53 can be easily checked from above. For this reason, the seat ring 53 is attached to the adjustment valve body 1, the first plug 10 and the second plug 11 and the seat ring 53 are exchanged, and the seat ring 53 and the first plug 10 and the second plug 11 When adjusting the positional relationship between
The upper lid 5 is removed from the adjustment valve main body 1, and the seat ring 5 is removed.
3 is screwed into the adjustment valve body 1 from above, the vertical mounting position of the seat ring 53 with respect to the adjustment valve body 1 is changed, and the first plug 10 and the first seat ring component 53a are And the close contact state between the second plug 11 and the second seat ring constituting portion 53b can be simultaneously adjusted to the best state. In particular, while the conventional adjustment valve has a configuration in which the first seat ring 12 and the second seat ring 13 are separately configured and attached to the adjustment valve body 1, respectively, in the adjustment valve of this embodiment, Since the first seat ring forming section 53a and the second seat ring forming section 53b are integrally formed, the first seat ring forming section 53a and the second seat ring forming section 53 are formed.
The distance between the first and second seat ring forming portions 53a and 53b is adjusted simultaneously by a single adjustment operation.

In the embodiment described above, one of the male screw portion 53e and the male screw portion 53f can be omitted, and the adjustment valve main body 1 which is screwed with the omitted male screw portion can be used. It is also possible to omit the internal thread portion of the seat ring 53 in such a configuration as compared with the case where the external thread portion 53e and the external thread portion 53f are formed.
Is simplified and facilitated. Further, in the embodiment described above, the upper lid 5 is removed from the adjustment valve main body 1 and the seat ring 53 is screwed into the adjustment valve main body 1 from above, but the lower lid 4 is removed from the adjustment valve main body 1. The seat ring 53 may be screwed into the adjustment valve main body 1 from below.

In the regulating valve using such a seat ring 53 as well, the valve rises through the gap created between the first plug 10 and the first seat ring constituting portion 53a and moves to the upper outflow direction changing chamber 8. The flow of the flowing fluid flows along the side wall of the upper outflow direction changing chamber 8 and further along the streamlined concave surface 71 continuous with the side wall, and the flow direction of the fluid is in the upper outflow direction changing chamber 8. The fluid is then sent downward in the upper outflow direction changing chamber 8 from the fluid outlet 3 to the downstream side. At this time, since the streamlined concave surface 71 has continuity with the curved surface constituting the side wall of the upper outflow direction changing chamber 8, the flow direction of the fluid changes in the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow, which are likely to occur when the flow is performed, are suppressed, and an efficient flow is generated.

On the other hand, the flow direction of the fluid flowing into the lower outflow direction changing chamber 61 via the gap formed between the second plug 11 and the second seat ring constituting portion 53b is the lower outflow direction changing chamber. In this case, the fluid is sent upward from the fluid outlet 3 to the downstream side. In this case, the lower outflow direction change chamber 61
By forming the bottom surface of the lower lid 4 constituting a part of the inner surface of the lower surface into a streamline-shaped concave surface 72 for reducing the resistance when the fluid flows similarly to the upper lid 5, the lower surface 4 is formed similarly to the upper outflow direction changing chamber 8. Separation vortices and turbulence in the flow which are likely to occur when the direction of the flow of the fluid is changed in the lower outflow direction changing chamber 61 are suppressed, and an efficient flow is generated.

Embodiment 3 FIG. FIG. 6 is a front view showing a cross-sectional configuration of the regulating valve according to the third embodiment configured as a double-seat valve, and FIG. 7 is a side view. 6 and FIG.
The same or corresponding parts are denoted by the same reference numerals. In the drawing, 1 is a regulating valve body, 2 is an upstream fluid inlet, 3 is a downstream fluid outlet, 4 is a lower lid fixed to the regulating valve body 1 by bolts, and 5 is a bolt on the regulating valve body 1. Is a gasket for maintaining watertightness and airtightness between the upstream side and the downstream side in the adjustment valve main body 1, and 7 is a gasket between the upstream side and the downstream side in the adjustment valve main body 1. A gasket for maintaining water tightness and air tightness therebetween, 81 is an upper outflow direction changing chamber communicating with the fluid outlet 3, and 91 is a lower outflow direction changing chamber similarly communicating with the fluid outlet 3. Reference numeral 10 denotes a first plug, and 11 denotes a second plug formed integrally with the first plug 10. Reference numeral 50 denotes a close contact between the first plug 10 and the second plug 11 to shut off the flow path between the upper outflow direction changing chamber 81 and the fluid inlet 2, and the lower outflow direction changing chamber 91 and the fluid inlet 2 is a seat ring that shuts off a flow path between the seat ring and the seat ring. The seat ring 50 is provided with a first seat ring component 50a that is in close contact with the first plug 10 and a second seat ring component 50b that is in close contact with the second plug 11. In addition, a concave portion 50g is formed on the upper end surface of the first seat ring constituting portion 50a so that the seat ring 50 can be easily turned on and off to the adjustment valve main body 1. Note that the seat ring 50 is fixed to the adjustment valve body 1 with screws. 14
Is a plug upper end formed integrally with the first plug 10 and the second plug 11, and 15 is a plug drive rod connected to the plug upper end. The first plug 10 and the second plug 11 are vertically lifted upward by a diaphragm operating device (not shown), so that a gap is formed between the first plug 10 and the second plug 11, and the upstream side and the downstream side communicate with each other. I do.

Reference numeral 71 denotes a streamlined concave surface formed on the bottom surface of the upper lid 5 constituting the upper inner surface of the upper outflow direction changing chamber 81. This concave surface 71 is formed so as to be continuous with a curved surface constituting the side wall of the upper outflow direction changing chamber 8,
When the direction of the flow of the fluid flowing out of the gap formed between the plug 10 and the first seat ring constituting portion 50a is changed to the direction of the fluid outlet 3 along the side wall of the upper outflow direction changing chamber 81. It has continuity with the curved surface that constitutes the side wall so as to suppress the occurrence of turbulence in the flow of air.

Next, the operation will be described. In this regulating valve, the first plug 10 and the second plug 11 are normally pressed vertically downward by a pressing spring arranged in the diaphragm operating device.
The plug 10 is in close contact with the first seat ring constituting portion 50a and the second plug 11 is in close contact with the second seat ring constituting portion 50b, so that the upper outflow direction changing chamber 81 and the lower outflow direction changing chamber 91 communicate with the fluid flow. It is in a state of being shut off from the entrance 2. In this state, when the diaphragm operating device operates, a vertically upward force is generated, and the plug driving rod 1
5 together with the first plug 10 and the second plug 11
Is moved vertically upward. As a result, gaps are created between the first plug 10 and the first seat ring constituting part 50a and between the second plug 11 and the second seat ring constituting part 50b, and the upper outflow direction changing chamber 81 and the lower A channel is formed by communicating between the side outflow direction changing chamber 91 and the fluid inflow port 2. In this case, the size of the gap generated between the first plug 10 and the first seat ring component 50a and between the second plug 11 and the second seat ring component 50b can be controlled by the diaphragm operating device. , And is flexibly adjusted as the valve opening.

Then, the flow of the fluid that has risen through the gap created between the first plug 10 and the first seat ring constituting portion 50a and has flowed into the upper outflow direction changing chamber 81 is increased. The fluid flows along the side wall 81 and further along the streamlined concave surface 71 continuous with the side wall, and the flow direction of the fluid is changed in the upper outflow direction changing chamber 81, and the inside of the upper outflow direction changing chamber 81 is now changed. Is downward and the fluid outlet 3
Is sent downstream. At this time, since the streamline concave surface 71 has continuity with the curved surface constituting the side wall of the upper outflow direction changing chamber 81, the flow direction of the fluid changes in the upper outflow direction changing chamber 81. Separation vortices and turbulence in the flow, which are likely to occur when the flow is performed, are suppressed, and an efficient flow is generated.

On the other hand, the flow direction of the fluid flowing into the lower outflow direction changing chamber 91 via the gap formed between the second plug 11 and the second seat ring constituting portion 50b is changed to the lower outflow direction changing chamber. In this case, the fluid is sent upward from the fluid outlet 3 to the downstream side. In this case, the lower outflow direction change chamber 91
The bottom of the inner surface is formed into a streamlined concave surface 72 for reducing the resistance when the fluid flows, similarly to the bottom surface of the upper lid 5,
Similarly to the upper outflow direction changing chamber 81, the separation vortex and the turbulence of the flow which are likely to be generated when the flow direction of the fluid is changed in the lower outflow direction changing chamber 91 are suppressed, and an efficient flow is generated.

Embodiment 4 FIG. FIG. 8 is a front view showing a sectional configuration of the regulating valve according to the fourth embodiment configured as a single-seat valve. In the figure, 21 is a regulating valve main body, 22 is an upstream fluid inflow port, 23 is a downstream fluid outflow port, 24 is an upper lid fixed to the regulating valve main body 21 by bolts, 26 is the regulating valve main body 21 and the upper lid 24 A gasket for maintaining water-tightness and air-tightness with the fluid; 28, an outflow direction changing chamber communicating with the fluid outlet 23; 30, a plug; A seat ring 34 for shutting off the flow path between the inflow port 22 and a plug drive rod 34 connected to the upper end surface of the plug. Plug 30
Is vertically pulled up by a diaphragm operating device (not shown), so that a gap is formed between the seat ring 31 and the upstream side and the downstream side communicate with each other.

Reference numeral 101 denotes a streamlined concave surface formed on the bottom surface of the upper lid 24 constituting the upper inner surface of the outflow direction changing chamber 28. The streamlined concave surface 101 corresponds to the outflow direction changing chamber 28.
The direction of the flow of the fluid flowing out of the gap formed between the plug 30 and the seat ring 31 is determined by the flow direction changing chamber 2.
8 has a continuity with the curved surface constituting the side wall so as to suppress the occurrence of flow turbulence when being changed in the direction of the fluid outlet 23 along the side wall.

Next, the operation will be described. In this regulating valve, the plug 30 is normally pressed vertically downward by a pressing spring arranged in the diaphragm operation device. As a result, the plug 30 comes into close contact with the seat ring 31 and the outflow direction changing chamber. 28 and the fluid inlet 22 are shut off. In this state, when the diaphragm operating device operates, a vertically upward force is generated, and the plug 30 is vertically moved via the plug drive rod 34. As a result, a gap is created between the plug 30 and the seat ring 31, and the outflow direction changing chamber 28 and the fluid inlet 22
Communicate with each other to form a flow path. In this case, the size of the gap generated between the plug 30 and the seat ring 31 can be controlled by the diaphragm operating device, and is flexibly adjusted as the valve opening.

Then, it rises through the gap created between the plug 30 and the seat ring 31 and rises to the outflow direction changing chamber 28.
The flow of the fluid flowing into the outflow direction changing chamber 28 is formed along the side wall of the flow direction changing chamber 28 and further into the streamlined concave surface 1 continuous with the side wall.
The flow direction of the fluid is changed in the outflow direction changing chamber 28, and the fluid flows downward in the outflow direction changing chamber 28 from the fluid outlet 23 to the downstream side. On this occasion,
Since the concave surface 101 has continuity with the curved surface constituting the side wall of the outflow direction changing chamber 28, the separation vortex which is likely to be generated when the flow direction of the fluid is changed in the outflow direction changing chamber 28 or The turbulence of the flow is suppressed, and an efficient flow is generated.

Embodiment 5 FIG. FIG. 9 shows a cross-sectional shape of the upper lid 5, in which a convex portion 73a forming a guide portion of the plug upper end portion 14 is provided at the center of a concave surface 73 formed at the lower portion. FIGS. 10A and 10B show other various lower cross-sectional shapes of the upper lid 5. FIG. 10A shows the concave surface 73 deep, and FIG. 10B shows the same concave surface 73 on the left and right of the convex portion 73a.
FIG. 10 (c) shows that the concave surface 73 is formed shallowly, and is formed in an arbitrary shape according to the resistance of the flowing fluid.

Although various embodiments have been described above, the present invention can be arbitrarily changed without changing the gist.

[0046]

As described above, according to the first aspect of the present invention, one of the inner surfaces constituting the outflow direction changing chamber for changing the outflow direction of the fluid flowing in from the gap formed between the plug and the seat ring. Since the portion is formed in a streamline shape to reduce the resistance when the fluid flows, the separation vortex and the turbulence of the flow which are likely to occur when the direction of the fluid flow is changed in the outflow direction changing chamber are suppressed, and the fluid This has the effect of preventing noise and vibration generated when the direction of the flow is changed.

According to the second aspect of the present invention, the bottom surface of the upper lid, which forms a part of the inner surface of the outflow direction changing chamber, is formed as a streamlined concave surface for reducing the resistance when the fluid flows, so that the streamline shape is obtained. Fluid flows smoothly in the outflow direction changing chamber along the concave top surface of the upper lid, and separation vortex and flow disturbance that are likely to occur when the flow direction of the fluid is changed in the outflow direction changing chamber are suppressed. Thus, there is an effect that noise and vibration generated when the flow direction of the fluid is changed can be prevented.

According to the third aspect of the present invention, the bottom surface of the lower lid, which forms a part of the inner surface of the outflow direction changing chamber, has a streamlined concave surface for reducing the resistance when the fluid flows. Fluid flows smoothly in the outflow direction changing chamber along the bottom surface of the lower lid formed on the concave surface of the lower surface, and peeling vortices and turbulence of the flow are likely to occur when the direction of the flow of the fluid is changed in the outflow direction changing chamber. And the noise and vibration generated when the direction of the flow of the fluid is changed can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional configuration diagram showing a regulating valve according to Embodiment 1 of the present invention.

FIG. 2 is a sectional configuration diagram showing a regulating valve according to a second embodiment of the present invention.

FIG. 3 is a perspective sectional view showing a configuration of a seat ring of a regulating valve according to a second embodiment of the present invention.

FIG. 4 is a perspective sectional view showing another embodiment of the seat ring of the regulating valve according to the second embodiment of the present invention.

FIG. 5 is a perspective sectional view showing another embodiment of the seat ring of the regulating valve according to the second embodiment of the present invention.

FIG. 6 is a front view showing a cross-sectional configuration of a regulating valve according to Embodiment 3 of the present invention.

FIG. 7 is a side view showing a sectional configuration of a regulating valve according to Embodiment 3 of the present invention.

FIG. 8 is a sectional configuration diagram showing a regulating valve according to Embodiment 4 of the present invention.

FIG. 9 is a sectional view of the upper lid.

FIG. 10 shows various lower cross-sectional shapes of the upper lid.

FIG. 11 is a cross-sectional configuration diagram showing a conventional regulating valve.

FIG. 12 is a sectional view showing a configuration of a conventional regulating valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adjustment valve main body 4 Lower lid 5 Upper lid 8, 81 Upper outflow direction change chamber 9, 61, 91 Lower outflow direction change chamber 10 First plug 11 Second plug 12 First seat ring 13 Second seat ring 28 Outflow direction change chamber 30 Plug 31, 50, 51, 52, 53 Seat ring 51a, 52a, 53a First seat ring component 51b, 52b, 53b Second seat ring component 71, 72, 101 Streamline concave surface

Claims (3)

[Claims] 1. A plug, comprising: a seat ring and a plug that moves on the same axis on which the seat ring is arranged, and closes the seat ring to shut off a flow path between an upstream side and a downstream side. With respect to the seat ring, the upstream side and the downstream side communicate with each other by a gap generated between the plug and the seat ring, and the fluid passing through the gap flows out to the outflow direction changing chamber, and the outflow occurs. In an adjusting valve for changing the outflow direction of the fluid in the direction change chamber and guiding the fluid from the upstream side to the downstream side, one of the inner surfaces constituting the outflow direction change chamber for changing the outflow direction of the fluid flowing from the gap. The part is formed in a streamline shape for reducing resistance when the fluid flows. 2. The regulating valve according to claim 1, wherein the bottom surface of the upper lid, which forms a part of the inner surface of the outflow direction changing chamber, is formed as a streamline concave surface for reducing a resistance when the fluid flows. 3. The bottom surface of the lower lid, which forms a part of the inner surface of the outflow direction changing chamber, is formed as a streamlined concave surface for reducing the resistance when the fluid flows. The described regulating valve.