CN103104710B - Crankshaft butterfly valve - Google Patents
Crankshaft butterfly valve Download PDFInfo
- Publication number
- CN103104710B CN103104710B CN201310053803.9A CN201310053803A CN103104710B CN 103104710 B CN103104710 B CN 103104710B CN 201310053803 A CN201310053803 A CN 201310053803A CN 103104710 B CN103104710 B CN 103104710B
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- valve
- axis
- valve body
- journal
- valve shaft
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Abstract
Provided is a crankshaft butterfly valve. A valve shaft of the crankshaft butterfly valve is a crankshaft. When a butterfly valve is closed, a first eccentric distance exists between axes of a main journal and a rod journal and a sealing section. The axis of the rod journal is located on one side of a vertical neutral surface, without a conical sealing surface vertex, of a valve body. A floating eccentric distance exists between the axis of the rod journal and the vertical neutral surface of the valve body. The axis of the main journal is located on the vertical neutral surface of the valve body or on one side of the vertical neutral surface, with a conical sealing surface vertex, of a valve body. When the axis of the main journal is located on one side of the conical sealing surface vertex, a second eccentric distance exists between the axis of the main journal and the vertical neutral surface of the valve body. Due to the facts that the valve shaft of the crankshaft butterfly valve is the crankshaft, the axis of the rod journal is located on one side of the vertical neutral surface, without the conical sealing surface vertex, of the valve body, the axis of the main journal is located on one side of the vertical neutral surface, with the conical sealing surface vertex, of the valve body, reverse fluid exerts pressure on a valve plate to enable the valve plate to close, and the crankshaft butterfly valve is capable of meeting usage requirements of a working condition with positive and reverse fluid flowing through.
Description
Technical field
The present invention relates to the valve shaft of a kind of butterfly valve, particularly a kind of butterfly valve.
Background technique
Butterfly valve has cylinder valve, there is inlet/outlet at valve body two ends, in valve body, there is round ring seat, the upper and lower of valve body circumference has respectively valve shaft seat, on valve shaft seat, there is respectively the perpendicular upper and lower valve shaft of axis of axis and valve body, on upper and lower valve shaft, be connected with the circular plate type valve plate matching with valve seat, upper and lower valve shaft has outer section and inner segment, outer section of upper and lower valve shaft on valve shaft seat, the inner segment of upper and lower valve shaft is connected on valve plate, between the excircle of valve plate and the inner circumference of valve seat, have the sealing pair matching, sealing pair has conical sealing surface.
Cylinder valve have the valve body vertical centering control facade that parallels with the axis of valve shaft and pass through valve axis with by valve axis the valve body horizontal neutral surface vertical with valve body vertical centering control facade.
The butterfly valve that bore is larger, will have certain distance or angle could realize the rotation of valve plate between the axis of the conical sealing surface of axis, valve axis and the sealing pair of valve shaft.
In butterfly valve, between the axis of valve shaft and sealed section, there is certain distance, this distance is the first eccentric distance of butterfly valve, between the axis of valve shaft and valve body vertical centering control facade, there is certain distance, this distance is the second eccentric distance of butterfly valve, the summit of conical sealing surface is to have certain angle on the horizontal neutral surface of valve body and between the axis of conical sealing surface and valve axis, this angle is the 3rd eccentric angle of butterfly valve, it is the side at valve body vertical centering control facade that the 3rd eccentric angle makes the summit of conical sealing surface, above-mentioned eccentric distance or eccentric angle are also referred to as bias, some butterfly valve only has the first eccentric distance, be called single eccentric-butterfly-valve, some butterfly valve has the first eccentric distance and the second eccentric distance, be called double eccentric butterfly valve, some butterfly valve has the first eccentric distance, the second eccentric distance and the 3rd eccentric angle, be called three eccentric butterfly valve.
In prior art, the valve shaft of butterfly valve is linear axis.For three eccentric butterfly valve, valve shaft can only be a side that has conical sealing surface summit at valve body vertical centering control facade, if valve shaft is a side that there is no conical sealing surface summit at valve body vertical centering control facade, butterfly valve can produce interference in the time of rotary opening and closing.When this three eccentric butterfly valve uses in the operating mode of only having forward fluid to flow through, after three eccentric butterfly valve is closed, because the valve plate area of valve shaft one side is greater than the valve plate area of valve shaft opposite side, the power that the positive pressure that forward fluid produces valve plate is closed valve plate, valve plate can be fastened further, meets preferably the usage requirement in the operating mode flowing through at forward fluid; But while use in the operating mode that has forward and reverse fluid to flow through, the power that the backpressure that counter fluid produces valve plate is opened by valve plate, make valve plate sealing bad, cause leakage, thereby can not meet the usage requirement in the operating mode that has forward and reverse fluid to flow through.
Summary of the invention
The object of the invention is in order to overcome above-mentioned deficiency, propose a kind ofly can meet the bent axle butterfly valve using in the operating mode that has forward and reverse fluid to flow through.
The present invention is achieved using the following method.
Bent axle butterfly valve has cylinder valve, and there is inlet/outlet at valve body two ends, has round ring seat in valve body, and the upper and lower of valve body circumference has respectively valve shaft seat, has respectively upper and lower valve shaft, upper and lower valve shaft on valve shaft seat
On be connected with the circular plate type valve plate matching with valve seat, between the excircle of valve plate and the inner circumference of valve seat, there is the sealing pair matching, sealing pair has conical sealing surface, between the axis of conical sealing surface and valve axis, there is eccentric angle, on, lower valve shaft is crankshaft structure, main journal and rod journal that the upper valve shaft of crankshaft structure has respectively crank arm to be connected with lower valve shaft, main journal is on valve shaft seat, rod journal is connected on valve plate, the main journal axis of upper valve shaft and lower valve shaft is on same straight line, the rod journal axis of upper valve shaft and lower valve shaft is on same straight line, when bent axle butterfly valve cuts out, the axis of main journal and rod journal at grade, between the axis of main journal and rod journal and sealed section, there is the first eccentric distance, the axis of rod journal is a side that there is no conical sealing surface summit at valve body vertical centering control facade, between the axis of rod journal and valve body vertical centering control facade, there is unsteady eccentric distance, main journal axis is on valve body vertical centering control facade, or in the side that has conical sealing surface summit of valve body vertical centering control facade, main journal axis has the second eccentric distance between main journal axis and valve body vertical centering control facade in the time of a side that has conical sealing surface summit of valve body vertical centering control facade.
When use, drive main journal of the present invention to rotate, swing by crank arm drivening rod axle journal, realize valve plate and open and close.
The upper and lower valve shaft of the present invention is crankshaft structure, the axis of rod journal is the side that there is no conical sealing surface summit at valve body vertical centering control facade, in the time that opening and closing, butterfly valve can not produce interference, the axis of main journal is not the side that there is no conical sealing surface summit at valve body vertical centering control facade, the axis of rod journal is the side that there is no conical sealing surface summit at valve body vertical centering control facade, the power that the backpressure that counter fluid produces valve plate is closed by valve plate, the present invention can meet the usage requirement in the operating mode that has forward and reverse fluid to flow through.
Below in conjunction with accompanying drawing, the present invention is further described.
Brief description of the drawings
Fig. 1 is according to the main cross-sectional schematic of a kind of bent axle butterfly valve of scheme of the invention proposition of the present invention;
Fig. 2 is that the A-A of Fig. 1 cuts open schematic diagram;
Fig. 3 is the schematic side view of Fig. 1;
Fig. 4 is the main cross-sectional schematic of the axis of the main journal a kind of bent axle butterfly valve on valve body vertical centering control facade;
Fig. 5 is that the A-A of Fig. 4 cuts open schematic diagram;
Fig. 6 is the schematic side view of Fig. 4.
Embodiment
In Fig. 1 ~ Fig. 3, bent axle butterfly valve has cylinder valve 1, valve body two ends have into, outlet 2, 3, in valve body, there is round ring seat 4, valve body circumference upper, there is respectively valve shaft seat 5 below, 6, on having respectively on valve shaft seat, lower valve shaft 7, 8, on, on lower valve shaft, be connected with the circular plate type valve plate 9 matching with valve seat, between the excircle of valve plate and the inner circumference of valve seat, there is the sealing pair matching, sealing pair has conical sealing surface 10, between the axis 11 of conical sealing surface and valve axis 12, there is eccentric angle β, on, lower valve shaft is crankshaft structure, main journal 14 and rod journal 15 that the upper valve shaft of crankshaft structure has respectively crank arm 13 to be connected with lower valve shaft, main journal is on valve shaft seat, rod journal is connected on valve plate, the main journal axis of upper valve shaft and lower valve shaft is on same straight line 16, the rod journal axis of upper valve shaft and lower valve shaft is on same straight line 17, when bent axle butterfly valve cuts out, the axis of main journal and rod journal at grade, between the axis of main journal and rod journal and sealed section, there is the first eccentric distance a, the axis of rod journal is a side that there is no conical sealing surface summit 19 at valve body vertical centering control facade 18, between the axis of rod journal and valve body vertical centering control facade, there is unsteady eccentric distance c, main journal axis is the side that has conical sealing surface summit at valve body vertical centering control facade, main journal axis is in the time of a side that has conical sealing surface summit of valve body vertical centering control facade, between main journal axis and valve body vertical centering control facade, there is the second eccentric distance b.
Above-mentioned main journal axis is the side that has conical sealing surface summit at valve body vertical centering control facade, between main journal axis and valve body vertical centering control facade, has the second eccentric distance b.
Main journal axis can be also on valve body vertical centering control facade, and main journal axis on valve body vertical centering control facade time, does not have eccentric distance between main journal axis and valve body vertical centering control facade.
In Fig. 4 ~ Fig. 6, main journal axis 16 is on valve body vertical centering control facade 18.
Claims (1)
1. a bent axle butterfly valve, there is cylinder valve, valve body two ends have into, outlet, in valve body, there is round ring seat, valve body circumference upper, there is respectively valve shaft seat below, on having respectively on valve shaft seat, lower valve shaft, on, on lower valve shaft, be connected with the circular plate type valve plate matching with valve seat, between the excircle of valve plate and the inner circumference of valve seat, there is the sealing pair matching, sealing pair has conical sealing surface, between the axis of conical sealing surface and valve axis, there is eccentric angle, it is characterized in that: on, lower valve shaft is crankshaft structure, main journal and rod journal that the upper valve shaft of crankshaft structure has respectively crank arm to be connected with lower valve shaft, main journal is on valve shaft seat, rod journal is connected on valve plate, the main journal axis of upper valve shaft and lower valve shaft is on same straight line, the rod journal axis of upper valve shaft and lower valve shaft is on same straight line, when bent axle butterfly valve cuts out, the axis of main journal and rod journal at grade, between the axis of main journal and rod journal and sealed section, there is the first eccentric distance, the axis of rod journal is a side that there is no conical sealing surface summit at valve body vertical centering control facade, between the axis of rod journal and valve body vertical centering control facade, there is unsteady eccentric distance, main journal axis is on valve body vertical centering control facade or in the side that has conical sealing surface summit of valve body vertical centering control facade, main journal axis is in the time of a side that has conical sealing surface summit of valve body vertical centering control facade, between main journal axis and valve body vertical centering control facade, there is the second eccentric distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310053803.9A CN103104710B (en) | 2013-02-20 | 2013-02-20 | Crankshaft butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310053803.9A CN103104710B (en) | 2013-02-20 | 2013-02-20 | Crankshaft butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103104710A CN103104710A (en) | 2013-05-15 |
| CN103104710B true CN103104710B (en) | 2014-07-02 |
Family
ID=48312800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310053803.9A Expired - Fee Related CN103104710B (en) | 2013-02-20 | 2013-02-20 | Crankshaft butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103104710B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3627261A (en) * | 1969-09-17 | 1971-12-14 | Andrews Ind Inc | Balanced rotary plate valve and method of making |
| JPS57161369A (en) * | 1981-03-31 | 1982-10-04 | Niigata Eng Co Ltd | Butterfly valve |
| CN2321985Y (en) * | 1998-03-19 | 1999-06-02 | 董永钏 | Double-eccentricity end face sealing butterfly valve |
| CN2336145Y (en) * | 1998-04-13 | 1999-09-01 | 董永钏 | Double eccentric end-face seal butterfly valve |
| CN2427683Y (en) * | 1999-10-11 | 2001-04-25 | 于建华 | Three off-center and hard sealing thermal insulation butterfly valve |
| CN2545432Y (en) * | 2002-01-22 | 2003-04-16 | 杨力锷 | Three-eccentric metal seal butterfly valve |
| CN201891855U (en) * | 2010-10-29 | 2011-07-06 | 天津市富赛克阀门有限公司 | Triple-eccentric bidirectional sealing metal-sealed butterfly valve |
| KR20120132810A (en) * | 2011-05-30 | 2012-12-10 | 주식회사 시퍼스 파이프 라인 | Structure of quadruple eccentricity metal butterfly valve |
| CN102865375B (en) * | 2011-07-08 | 2014-10-29 | 孙杰 | Tri-eccentric butterfly valve and production method thereof |
| CN203115136U (en) * | 2013-02-20 | 2013-08-07 | 铁岭大沃阀门（集团）有限公司 | Butterfly valve with crankshaft |
-
2013
- 2013-02-20 CN CN201310053803.9A patent/CN103104710B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN103104710A (en) | 2013-05-15 |
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Granted publication date: 20140702 Termination date: 20150220 |
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