CN216618584U - Double-flow-direction metal hard seal butterfly valve - Google Patents
Double-flow-direction metal hard seal butterfly valve Download PDFInfo
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- CN216618584U CN216618584U CN202123265968.1U CN202123265968U CN216618584U CN 216618584 U CN216618584 U CN 216618584U CN 202123265968 U CN202123265968 U CN 202123265968U CN 216618584 U CN216618584 U CN 216618584U
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Abstract
The utility model discloses a double-flow-direction metal hard seal butterfly valve, which comprises: a valve body; the valve rod is rotatably arranged in the valve body, and the top end of the valve rod extends out of the valve body; a lower cap installed at a bottom end of the valve stem; the driving device is in transmission connection with the top end of the valve rod; the butterfly plate is arranged on the valve rod; the butterfly valve also comprises an upper bearing and a lower bearing, wherein the upper part of the valve rod is rotationally connected with the valve body through the upper bearing; the lower part of the valve rod is rotationally connected with the valve body through the lower bearing; this butterfly valve still includes: and the packing is positioned above the upper bearing and between the valve rod and the valve body. When the medium descends through the clearance between the valve rod and the lower bearing, the third sealing ring is extruded, downward acting force is applied to the third sealing ring and the valve rod, and therefore the upward and downward acting force applied to the valve rod is balanced, and power loss is avoided.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a double-flow-direction metal hard seal butterfly valve.
Background
Butterfly valves, also known as flap valves, are control elements used in fluid line systems to regulate or shut off media. A butterfly valve is a valve in which a closing member is a disk and rotates around a valve shaft to open and close. The valve can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, mud, oil products and the like. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.
The metal sealing butterfly valve has the advantages of wide application range, compact structure, high cost performance, quick opening and closing and the like, but has the problems that reverse sealing pressure is lower than forward sealing pressure, the valve sealing effect is unstable when medium is reversed greatly, a valve rod generates large axial thrust under the action of the medium pressure and the like.
In chinese patent application No.: CN201310251632.0 discloses a butterfly valve, which comprises a valve body, wherein a valve flap is arranged in the valve body, the valve flap is a butterfly plate, a valve cover is arranged at the position of a valve rod above the valve body, a valve rod bearing is arranged at the end part of the valve rod, sealing fillers and gaskets are arranged at two sides of the drift diameter of the valve body, and the valve seat is arranged in the valve body; the valve rod is provided with a handle, the valve rod and the butterfly plate are integrated and extend out of the cavity of the valve body, the valve clack and the valve rod are made of steel materials, and the valve seat and the lining are made of soft sealing materials.
In chinese patent application No.: CN200710010656.1 discloses an external butterfly valve of high performance bearing, including actuating mechanism, valve body, valve shaft, valve plate, bearing frame, bearing, seal receptacle, the bearing sets up in the bearing seal receptacle outside, is equipped with the sealing member on the inboard valve shaft of bearing, and the bearing seal receptacle inboard is equipped with the sealing filler. The sealing contact surface of the sealing seat is an oblique cone body and is in oblique cone body contact with the sealing piece. The valve shaft is a stainless steel valve shaft.
In the prior art, a small gap exists between the valve rod and the bearing located above the valve rod. The packing is sealed with the valve rod. The medium under the high pressure gets into the clearance to upwards promote the filler, and then apply ascending effort to the valve rod, increase power loss.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem in at least one aspect in the background art, the utility model provides a double-flow-direction metal hard seal butterfly valve.
The utility model provides a double-flow-direction metal hard seal butterfly valve, which comprises:
a valve body;
the valve rod is rotatably arranged in the valve body, and the top end of the valve rod extends out of the valve body;
a lower cap installed at a bottom end of the valve stem;
the driving device is in transmission connection with the top end of the valve rod;
the butterfly plate is mounted on the valve rod;
the butterfly valve also comprises an upper bearing and a lower bearing, wherein the upper part of the valve rod is rotationally connected with the valve body through the upper bearing; the lower part of the valve rod is rotationally connected with the valve body through the lower bearing;
this butterfly valve still includes:
the packing is positioned above the upper bearing and between the valve rod and the valve body;
the gland is positioned above the packing and is arranged on the valve body, and a through hole for the valve rod to pass through is formed in the gland;
a third groove is formed in the joint of the lower part of the valve rod and the valve body and is positioned above the lower bearing;
the butterfly valve further comprises a third sealing ring, and the third sealing ring is arranged in the third groove.
Preferably, a fourth groove is arranged at the joint of the upper part of the valve rod and the valve body, and the fourth groove is positioned below the upper bearing;
the butterfly valve further comprises a fourth sealing ring, and the fourth sealing ring is installed in the fourth groove.
Preferably, the diameter of the fourth seal ring is equal to the diameter of the third seal ring.
Preferably, a gasket is arranged between the lower cover and the valve body.
Preferably, the lower part of the valve rod is provided with a step which is abutted with the valve body.
The beneficial effects brought by one aspect of the utility model are as follows:
when the medium descends through the clearance between the valve rod and the lower bearing, the third sealing ring is extruded, downward acting force is applied to the third sealing ring and the valve rod, and therefore the upward and downward acting force applied to the valve rod is balanced, and power loss is avoided.
Drawings
FIG. 1 is a schematic structural view of one aspect of the present disclosure;
FIG. 2 is an enlarged schematic view of FIG. 1 at P1 in accordance with the present disclosure;
FIG. 3 is an enlarged schematic view of FIG. 1 at P2 in accordance with the present disclosure;
FIG. 4 is an enlarged schematic view of FIG. 1 at P3 in accordance with the present disclosure;
FIG. 5 is an axial view of a butterfly plate, fastener, etc. of the present disclosure;
FIG. 6 is an axial view of a butterfly plate, fastener, etc. of the disclosed invention;
FIG. 7 is a cross-sectional view of a butterfly plate, fastener, etc. of the present disclosure;
FIG. 8 is an enlarged axial view of a portion of the butterfly plate and fastener disclosed in the present invention;
FIG. 9 is an enlarged axial view of a portion of the butterfly plate and fastener disclosed in the present invention.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
For better illustration, the partial structures of the third and fourth seal rings are not shown in fig. 2 and 3.
Referring to fig. 1 to 9, the present invention provides a double-flow-direction metal hard seal butterfly valve, including:
a valve body 1; the valve rod 2 is rotatably arranged in the valve body 1, and the top end of the valve rod extends out of the valve body 1; a lower cap 3 mounted on the bottom end of the valve stem 2; the driving device 4 is in transmission connection with the top end of the valve rod 2; a butterfly plate 5 mounted on the valve rod 2; a valve seat 13, which is positioned between the valve body 1 and the butterfly plate 5 and is provided with a sealing surface, and a sealing pair is formed between the sealing surface and the butterfly plate 5; and a fastening member 6 mounted on the valve body 1 for fixing the valve seat 13.
A gasket 11 may be provided between the lower cover 3 and the valve body 1 to prevent leakage. The lower part of the valve rod 2 can be provided with a step 203, and the step 203 is abutted against the valve body 1 to prevent the valve rod 2 from rising due to upward acting force.
The valve rod 2 is driven to rotate by the driving device 4.
As a further improvement of the above embodiment, in one embodiment, the outer side wall of the butterfly plate 5 gradually converges inwardly in the forward flow direction; the valve seat 13 is annular and is positioned between the butterfly plate 5 and the valve body 1; the sealing surface is the inner side wall of the valve seat 13, the sealing surface gradually expands inwards along the positive flow direction, and the sealing surface is in sealing fit with the outer side wall of the butterfly plate 5.
As a further improvement of the above embodiment, in one embodiment, the outer side wall of the butterfly plate 5 is provided with a first groove 501 arranged in a ring shape; the butterfly valve further comprises a first sealing ring 7, wherein the first sealing ring 7 is located in the first groove 501.
In this embodiment, the valve seat 13 is separate from the valve body 1.
With reference to fig. 1, 3 and 8, when a medium is introduced in the forward direction, the medium pushes the butterfly plate 5 to slightly move axially under the forward pressure, and the valve seat 13 is pressed by the first sealing ring 7. The valve seat 13 is restrained by the fastener 6. The sealing effect between the outer side wall of the butterfly plate 5 and the inner side wall of the valve seat 13 is good.
When the medium is reversely led in, under the action of reverse pressure, the medium pushes the valve seat 13 to generate micro axial movement, the higher the medium pressure is, the more obvious the pushing effect is, the inner side wall of the valve seat 13 extrudes the first sealing ring 7, and the better the sealing effect is.
With reference to fig. 8, the outer side wall of the butterfly plate 5 and the inner side wall of the valve body 1 both form an inclined plane, and by arranging the first seal ring 7, a good sealing effect can be ensured when a medium is not introduced in the forward direction or the reverse direction. The use of the double flow direction is convenient.
As a further improvement of the above embodiment, in one embodiment, the butterfly valve further includes a pressing ring 14 arranged in a ring shape, and the pressing ring 14 is mounted on the butterfly plate 5 and is pressed and held on the first sealing ring 7. The clamping ring 14 can be connected to the butterfly plate 5 by means of screws.
When the first seal ring 7 is mounted on the first groove 501, the pressing ring 14 is mounted to press the first seal ring 7.
The valve seat 13 is arranged on the outer layer of the butterfly plate 5 and then fixed by the fastener 6.
As a further improvement of the above embodiment, in one embodiment, the outer side wall of the valve seat 13 is provided with a second groove 131 arranged annularly; the butterfly valve further comprises a second sealing ring 8, the second sealing ring 8 being located in said second groove 131. The second sealing ring 8 is abutted against the valve body 1, and sealing between the valve seat 13 and the valve body 1 is realized.
As a further improvement to the above embodiment, in one embodiment, the fastener 6 is a four-open loop, and the four-open loop is provided with a protrusion 601; and the valve body 1 is provided with an accommodating groove matched with the bulge 601.
After the valve seat 13 is installed, the protrusion 601 is placed in the accommodating groove, so that the fastening piece 6 is conveniently connected with the valve body 1. The four-open ring is restricted from axial movement by the valve body 1.
The four-open ring may be connected to the valve seat 13 by bolts.
As a further improvement of the above embodiment, in one embodiment, the butterfly valve further comprises an upper bearing 15 and a lower bearing 16, wherein the upper part of the valve rod 2 is rotatably connected with the valve body 1 through the upper bearing 15; the lower part of the valve rod 2 is rotatably connected with the valve body 1 through the lower bearing 16.
As a further refinement of the above embodiment, in one implementation, the butterfly valve further includes:
a packing 17 located above the upper bearing 15 and between the valve stem 2 and the valve body 1; and the gland 18 is positioned above the packing 17 and is installed on the valve body 1, and a through hole for the valve rod 2 to pass through is formed in the gland 18. The packing 17 seals the valve against the medium flowing out through the gap between the valve rod 2 and the upper bearing 15.
As a further improvement of the above embodiment, in one embodiment, a third groove 201 is provided at the connection between the lower part of the valve rod 2 and the valve body 1, and the third groove 201 is located above the lower bearing 16; the butterfly valve further comprises a third sealing ring 9, wherein the third sealing ring 9 is arranged in the third groove 201.
As a further improvement of the above embodiment, in an embodiment, a fourth groove 202 is provided at a connection between an upper portion of the valve rod 2 and the valve body 1, and the fourth groove 202 is located below the upper bearing 15; the butterfly valve further comprises a fourth seal ring 10, said fourth seal ring 10 being mounted in said fourth groove 202. The diameters of the fourth seal ring 10 and the third seal ring 9 may be equal.
With reference to fig. 2, when the medium moves upward through the gap between the valve rod 2 and the upper bearing 15, the medium is further prevented from flowing out by providing the fourth seal ring 10. The medium presses the fourth sealing ring 10, and the medium exerts an upward acting force on the valve rod 2 and the fourth sealing ring 10.
There is a mounting clearance between the valve stem 2 and the lower bearing 16. With reference to fig. 3, by providing the third sealing ring 9, the third sealing ring 9 abuts against the valve body 1.
When the medium descends through the gap between the valve rod 2 and the lower bearing 16, the third sealing ring 9 is extruded, downward acting force is applied to the third sealing ring 9 and the valve rod 2, and therefore the upward acting force and the downward acting force applied to the valve rod 2 are balanced.
In the prior art, the medium passes through the gap between the valve rod 2 and the upper bearing 15, presses the packing 17, and applies an upward force to the valve rod 2. The valve body 1 can wear the valve rod 2, and applies friction torque to the valve rod 2, so that power loss is increased.
In this embodiment, under the action of medium pressure, because the diameters of the fourth sealing ring 10 and the third sealing ring 9 are equal, and the acting forces are mutually offset, the acting force of the valve body 1 on the valve rod 2 is completely eliminated, the friction torque of the valve rod 2 is reduced, and the power consumption is reduced.
In another embodiment, the valve body and the valve seat may be integrally formed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (5)
1. A double flow to metal hard seal butterfly valve, comprising:
a valve body;
the valve rod is rotatably arranged in the valve body, and the top end of the valve rod extends out of the valve body;
a lower cap installed at a bottom end of the valve stem;
the driving device is in transmission connection with the top end of the valve rod;
the butterfly plate is mounted on the valve rod;
the butterfly valve also comprises an upper bearing and a lower bearing, wherein the upper part of the valve rod is rotationally connected with the valve body through the upper bearing; the lower part of the valve rod is rotationally connected with the valve body through the lower bearing;
this butterfly valve still includes:
the packing is positioned above the upper bearing and between the valve rod and the valve body;
the gland is positioned above the packing and is arranged on the valve body, and a through hole for the valve rod to pass through is formed in the gland;
a third groove is formed in the joint of the lower part of the valve rod and the valve body and is positioned above the lower bearing;
the butterfly valve further comprises a third sealing ring, and the third sealing ring is arranged in the third groove.
2. The butterfly valve of claim 1, wherein a fourth groove is provided at a junction of an upper portion of the valve stem and the valve body, the fourth groove being located below the upper bearing;
the butterfly valve further comprises a fourth sealing ring, and the fourth sealing ring is installed in the fourth groove.
3. The butterfly valve of claim 2, wherein the diameter of the fourth seal ring is equal to the diameter of the third seal ring.
4. The butterfly valve of claim 1 wherein a gasket is disposed between the lower cover and the valve body.
5. The butterfly valve of claim 1 wherein the lower portion of the valve stem is provided with a step that abuts the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123265968.1U CN216618584U (en) | 2021-12-23 | 2021-12-23 | Double-flow-direction metal hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123265968.1U CN216618584U (en) | 2021-12-23 | 2021-12-23 | Double-flow-direction metal hard seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618584U true CN216618584U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123265968.1U Active CN216618584U (en) | 2021-12-23 | 2021-12-23 | Double-flow-direction metal hard seal butterfly valve |
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| Country | Link |
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| CN (1) | CN216618584U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013546A (en) * | 2022-07-14 | 2022-09-06 | 良工阀门集团有限公司 | Two-way seal structure and butterfly valve |
-
2021
- 2021-12-23 CN CN202123265968.1U patent/CN216618584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013546A (en) * | 2022-07-14 | 2022-09-06 | 良工阀门集团有限公司 | Two-way seal structure and butterfly valve |
| CN115013546B (en) * | 2022-07-14 | 2023-03-14 | 良工阀门集团有限公司 | Two-way seal structure and butterfly valve |
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