CN220850834U - Butterfly force balance type valve core cam deflection valve - Google Patents
Butterfly force balance type valve core cam deflection valve Download PDFInfo
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- CN220850834U CN220850834U CN202322687331.4U CN202322687331U CN220850834U CN 220850834 U CN220850834 U CN 220850834U CN 202322687331 U CN202322687331 U CN 202322687331U CN 220850834 U CN220850834 U CN 220850834U
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- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 17
- 230000007246 mechanism Effects 0.000 description 7
- 238000012856 packing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a butterfly force balance type valve core cam deflection valve, which comprises: the valve body is provided with a first end face, a second end face and a first cavity, and a circumferential protrusion is arranged in the valve body; a valve seat having a second cavity therethrough, the valve seat disposed within the first cavity; the pressing ring is arranged at the first end face and used for pressing the valve seat; the valve rod penetrates through the through hole of the valve body, the first end of the valve rod is arranged in the first cavity, and the second end of the valve rod is arranged outside the valve body; the valve core is connected with the first end of the valve rod, a butterfly plate and a partition plate are arranged along the axial direction of the valve rod, the other end of the butterfly plate is connected with a sealing plate, and the sealing plate can seal the second cavity; and the sealing ring is arranged at the joint of the through hole and the first cavity and is positioned between the valve rod and the valve body. The utility model reduces unbalanced moment of the valve core, improves dynamic stability of the valve core and improves adjustment precision of the control valve.
Description
Technical Field
The utility model relates to the technical field of process industrial automation, in particular to a butterfly force balance type valve core cam deflection valve.
Background
In the petrochemical and chemical fields, the process device is developing to the directions of large scale, high parameters (large capacity, high pressure and high temperature), high precision, high quality, high benefit and the like, and the process production process has higher requirements on the reliability, quality, cost, safety, environmental protection, service life of the device and the like. Control valves are key devices for fluid control and to meet the higher demands of users, it is necessary to provide control valves of different structural types.
In the working conditions that the fluid medium is multiphase flow (solid-liquid, gas-solid) and high pressure difference, the high-speed fluid containing solid particles passing through the control valve can seriously scour, abrade and other damages to the control valve parts at the throttle orifice, the valve cavity and the like, the service life of the valve element is shortened, even the valve element is invalid, and meanwhile, large noise, vibration, internal leakage, external leakage and the like are generated, so that the reliability, safety and environmental protection of the operation of the device are seriously affected.
The cam deflection valve is a special eccentric structure control valve, and the special eccentric structure design of the cam deflection valve ensures that the cam deflection valve has strong circulation capacity, small flow resistance and good wear resistance, and is particularly suitable for the working conditions. However, due to the eccentric structure of the cam deflection valve, the flow speed and the flow direction of fluid in the valve cavity are extremely unstable, the unbalanced moment of the valve core is large and unbalanced, and a large actuating mechanism is required to drive so as to realize the switching and the regulation stability of the control valve, so that the cost of the control valve is increased, the dynamic stability of the valve core is poor, and the regulation precision and the reliability of the control valve are affected.
Therefore, the butterfly force balance type valve core cam deflection valve provided by the utility model has the advantages that the valve core adopts a symmetrical structure, the problems of nonuniform flow direction and flow velocity of valve cavity fluid can be effectively solved, the unbalanced moment of the valve core is reduced, the dynamic stability of the valve core is good, the adjusting precision and reliability of the control valve are improved, and meanwhile, the specification of an actuating mechanism can be reduced, so that the cost of the control valve is reduced.
Disclosure of utility model
In view of the drawbacks of the prior art, an object of the present utility model is to provide a flexvalve that is capable of improving dynamic stability and adjustment accuracy.
The utility model provides a butterfly force balance type valve core cam deflection valve, which comprises:
The valve body is provided with a first end face, a second end face and a first cavity communicated with the first end face and the second end face, one side of the valve body is provided with a through hole communicated with the first cavity, a circumferential protrusion is arranged in the valve body, and the protrusion is close to the first end face;
The valve seat is provided with a second cavity which is communicated, the valve seat is arranged in the first cavity, the circulation direction of the second cavity is consistent with that of the first cavity, one end of the valve seat is close to the first end face, and the other end of the valve seat is in contact with the bulge;
the pressing ring is arranged at the first end face and used for pressing the valve seat;
The valve rod penetrates through the penetrating hole, the first end of the valve rod is arranged in the first cavity, the second end of the valve rod is arranged outside the valve body, the valve rod is not intersected with the flow center of the second cavity, and the valve rod can rotate relative to the valve body;
The valve core is connected with the first end of the valve rod, a butterfly plate and a partition plate are arranged along the axial direction of the valve rod, the other end of the butterfly plate is connected with a sealing plate, and the sealing plate can seal the second cavity;
And the sealing ring is arranged at the joint of the through hole and the first cavity and is positioned between the valve rod and the valve body.
Preferably, the clamping ring is embedded between the valve body and the valve seat.
Preferably, the valve core is sleeved on the circumference of the valve rod.
Preferably, the valve core is connected with the valve rod through a flat key.
Preferably, the end of the second cavity of the valve seat, which is close to the protrusion, is a conical surface.
Further, the sealing plate is provided with a spherical crown surface, and the spherical crown surface of the sealing plate is matched with the conical surface of the valve seat.
Preferably, the butterfly plate is parallel to the partition plate.
Further, the projection of the sealing plate and the butterfly plate on the plane of the partition plate is the same as the partition plate.
Further, a first through hole is formed in the butterfly plate.
Further, a second through hole is formed in the partition plate.
Compared with the prior art, the utility model has the following beneficial effects:
1. According to the butterfly force balance type valve core cam deflection valve provided by the utility model, the valve core adopts a symmetrical structure, so that the fluid force moment received by the valve core in the opening state is mutually counteracted, the moment received by the valve core is reduced, the stability of the valve core is greatly improved, the service life of the valve core is prolonged, and the adjustment precision and reliability of the control valve are improved to a certain extent.
2. The symmetrical partition plates of the valve core enable the fluid at two sides of the valve cavity to keep relatively consistent dynamic stability, so that vortex generation is greatly reduced, flow resistance is reduced, dynamic stability of the valve core is improved, scouring and abrasion of the valve core are reduced, and adjustment accuracy and reliability of the control valve are further improved.
3. The butterfly force balance type valve core cam flex valve provided by the utility model can reduce the cross sections of the valve core and the valve rod, reduce the driving force of the actuating mechanism and reduce the cost of the valve.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a butterfly force balanced spool cam flex valve according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of a butterfly force balanced spool cam flex valve in accordance with an embodiment of the present utility model in a closed position;
FIG. 3 is a schematic diagram of an open state of a butterfly force balanced spool cam flex valve according to an embodiment of the utility model;
FIG. 4 is a schematic illustration of a butterfly force balanced spool cam flex valve spool according to an embodiment of the utility model;
fig. 5 is a graph of fluid pressure and torque experienced by a spool of a butterfly force balanced spool cam flex valve in accordance with an embodiment of the present utility model.
In the figure, 1-pressing ring, 2-valve seat, 3-valve body, 31-bulge, 4-valve core, 41-butterfly plate, 42-baffle, 43-sealing plate, 5-valve rod, 6-flat key, 7-sealing ring, 8-packing and 9-packing gland.
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
The utility model provides a butterfly force balance type valve core cam deflection valve, wherein a valve core adopts a symmetrical structure, so that the problems of uneven flow direction and flow velocity of valve cavity fluid are effectively solved, unbalanced moment of the valve core is reduced, dynamic stability of the valve core is good, adjustment precision and reliability of a control valve are improved, and simultaneously, specifications of an actuating mechanism are correspondingly reduced, and cost of the control valve is reduced.
As shown in fig. 1, the butterfly force balance type spool cam deflection valve of the present embodiment includes a valve body 3, a valve seat 2, a pressing ring 1, a valve stem 5, and a spool 4. The valve body 3 is a pressure-bearing member of a valve, and has a first end face and a second end face, and the first end face and the second end face are communicated through a first cavity; a through hole is formed in the side wall of the valve body 3, and is communicated with the first cavity and used for installing the valve rod 5; the valve body 3 is also internally provided with a circumferential bulge 31; in appearance, the valve body 3 generally has three sections, and the flow cross section of the middle section where the through hole is located is larger than the flow cross sections of the first end face and the second end face. The valve seat 2 is provided with a second cavity which is communicated, the valve seat 2 is arranged in the first cavity, and the flow direction of the second cavity is consistent with that of the first cavity; when the valve seat 2 is placed in the first cavity, one end of the valve seat 2 is close to or flush with the first end face, the other end of the valve seat 2 abuts against the protrusion 31, and the periphery of the valve seat 2 contacts with the inner wall of the valve body 3 as much as possible to form sealing fit. The pressing ring 1 is arranged at the first end surface and presses the valve seat 2 into the valve body 3. The valve rod 5 passes through the through hole of the valve body 3, the first end of the valve rod is arranged in the first cavity, and the second end of the valve rod is arranged outside the valve body 3; the second end of the valve rod 5 is used for connecting an actuating mechanism, and the valve rod 5 is driven to rotate through the actuating mechanism. The valve core 4 is arranged in the first cavity of the valve body 3 and is connected with the first end of the valve rod 5; the valve core 4 can seal the second cavity, and the valve core 4 is driven by the valve rod 5 to rotate, so that the circulation state of the valve is controlled; the valve core 4 is of an eccentric structure, namely, the axis of the valve rod 5 and the centers of the flow channels of the valve seat 2 and the valve body 3 have eccentric distances.
As shown in fig. 1 and 4, the valve element 4 is provided with a butterfly plate 41 and a partition plate 42 in the axial direction along the valve stem 5, the butterfly plate 41 and the partition plate 42 being provided on opposite sides of the valve stem 5. The other end of the butterfly plate 41 is connected with a sealing plate 43, and the sealing plate 43 is matched with the second cavity to block the second cavity, so that fluid is blocked. In this embodiment, the end surface of the valve seat 2 near the protrusion 31 is a conical surface, the sealing plate 43 has a spherical cap surface, and the spherical cap surface and the conical surface cooperate to form a sealing pair, so as to realize sealing.
The butterfly plate 41 and the partition plate 42 may have an angle greater than 90 ° and less than 180 °, or may be parallel to each other, that is, an angle of 0 ° or 180 °. In this embodiment, the butterfly plate 41 is disposed in parallel with the partition plate 42. The butterfly plate 41 is combined with the projection surface of the sealing plate 43 on the projection surface with respect to the partition plate 42, i.e., in the front view direction as shown in fig. 1, and the partition plate 42 has the same shape as the combination, thereby realizing the symmetrical arrangement of the valve element 4. The butterfly plate 41 is provided with a first through hole, the partition plate 42 is provided with a second through hole, in this embodiment, the first through hole and the second through hole are rectangular holes, and a plurality of circular holes are formed around the second through hole; by providing the first through hole, the second through hole, and the circular hole, it is possible to allow the fluid to flow through these holes, reduce the flushing of the valve element 4 by the fluid, and change the flow state of the fluid.
As shown in fig. 1, the valve core 4 is sleeved on the valve rod 5, the valve core 4 is matched with the valve rod 5 through the flat key 6, so that the valve core 4 can rotate along with the valve rod 5, and relative rotation between the valve core 4 and the valve rod 5 can not occur.
In this embodiment, the first end face and the second end face of the valve body 3 are used for being connected with an external pipeline, and according to the fluid medium and the pressure-bearing state, welding connection or flange connection can be selected, and the first end face and the second end face are correspondingly welding surfaces or flange surfaces. The valve rod 5 may be perpendicular to the flow passage direction of the valve body 3, or may have an included angle of not 90 ° with the flow passage direction of the valve body 3. The pressing ring 1 is embedded between the valve body 3 and the valve seat 2, so that the valve seat 2 is in pressing connection with the valve body 3.
A sealing ring 7 is also filled between the valve rod 5 and the valve body 3, and the sealing ring 7 is close to the first cavity and is in direct contact with a fluid medium; by providing the sealing ring 7, leakage of the valve can be reduced. A packing 8, a packing gland 9 and the like are also arranged on the outer side of the sealing ring 7.
As shown in fig. 2, the flex valve of the present embodiment is in a closed state, and as is apparent from fig. 2, there is an eccentricity between the axis of the valve rod 5 and the center of the flow passage of the valve body 3, and the partition 42 of the valve core 4 is located in a 180 ° direction opposite to the butterfly plate 41. The valve core 4 is of an eccentric structure, so that the spherical crown surface of the valve core 4 is separated from the sealing surface of the valve seat 2 at the opening moment, the abrasion between sealing pairs is reduced, and the service life of the valve is prolonged; simultaneously, when the valve core 4 is closed, the moment can be continuously applied, the sealing specific pressure between the sealing pairs is increased, and the tight closing of the valve is realized.
As shown in fig. 3, the flex valve of the present embodiment is in an open state, in which both the butterfly plate 41 and the partition plate 42 are subjected to the impact of fluid, so that the torques M1 and M2 are generated respectively, and the directions of the torques M1 and M2 are opposite, so that the torques M1 and M2 can be offset, and the total torque M0 obtained after the torques M0 are the actual torques to which the valve element 4 is subjected. As shown in fig. 5, the torque variation of the valve core 4 in the valve opening state is far smaller than M1 in the range from off to on, so that the torque and dynamic stability of the valve core 4 are greatly changed.
The valve core 4 structure of the embodiment, the symmetrical butterfly plate 41 and the partition plate 42 can keep the fluid at two sides of the valve cavity relatively consistent dynamic stability, thereby greatly reducing the generation of vortex flow, reducing flow resistance, further improving the dynamic stability of the valve core 4 and reducing the scouring and abrasion of the valve core 4; the circular holes in the partition 42 further increase the flow area of the medium and prevent throttling.
The torque borne by the valve core 4 is reduced, so that the valve core 4 is more convenient to adjust, and the adjusting precision is improved while the stability is ensured. In addition, the cross sections of the valve core 4 and the valve rod 5 can be reduced, and an actuating mechanism with smaller driving force is adopted, so that the manufacturing cost of the valve is reduced.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. A butterfly force balanced spool cam flex valve, comprising:
The valve body is provided with a first end face, a second end face and a first cavity communicated with the first end face and the second end face, one side of the valve body is provided with a through hole communicated with the first cavity, a circumferential protrusion is arranged in the valve body, and the protrusion is close to the first end face;
The valve seat is provided with a second cavity which is communicated, the valve seat is arranged in the first cavity, the circulation direction of the second cavity is consistent with that of the first cavity, one end of the valve seat is close to the first end face, and the other end of the valve seat is in contact with the bulge;
the pressing ring is arranged at the first end face and used for pressing the valve seat;
The valve rod penetrates through the penetrating hole, the first end of the valve rod is arranged in the first cavity, the second end of the valve rod is arranged outside the valve body, the valve rod is not intersected with the flow center of the second cavity, and the valve rod can rotate relative to the valve body;
The valve core is connected with the first end of the valve rod, a butterfly plate and a partition plate are arranged along the axial direction of the valve rod, the other end of the butterfly plate is connected with a sealing plate, and the sealing plate can seal the second cavity;
And the sealing ring is arranged at the joint of the through hole and the first cavity and is positioned between the valve rod and the valve body.
2. The butterfly force balanced spool cam flex valve of claim 1, wherein the clamping ring is embedded between the valve body and the valve seat.
3. The butterfly force balanced spool cam flex valve of claim 1, wherein the spool is nested in the circumferential direction of the valve stem.
4. The butterfly force balanced spool cam flex valve of claim 3, wherein the spool is keyed to the valve stem.
5. The butterfly force balanced spool cam flex valve of claim 1, wherein the second cavity of the valve seat is tapered near the end of the boss.
6. The butterfly force balanced spool cam flex valve of claim 5, wherein said seal plate has a spherical cap surface that mates with a tapered surface of said valve seat.
7. The butterfly force balanced spool cam flex valve of claim 1, wherein the butterfly plate is parallel to the diaphragm.
8. The butterfly force balanced spool cam flex valve of claim 7, where the seal plate, the butterfly plate, and the diaphragm plate are projected on the same plane as the diaphragm.
9. The butterfly force balanced spool cam flex valve of claim 1, wherein said butterfly plate is open with a first through hole.
10. The butterfly force balanced spool cam flex valve of claim 9, characterized in that said diaphragm is open with a second through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687331.4U CN220850834U (en) | 2023-10-08 | 2023-10-08 | Butterfly force balance type valve core cam deflection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687331.4U CN220850834U (en) | 2023-10-08 | 2023-10-08 | Butterfly force balance type valve core cam deflection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220850834U true CN220850834U (en) | 2024-04-26 |
Family
ID=90787721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322687331.4U Active CN220850834U (en) | 2023-10-08 | 2023-10-08 | Butterfly force balance type valve core cam deflection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220850834U (en) |
-
2023
- 2023-10-08 CN CN202322687331.4U patent/CN220850834U/en active Active
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