CN101929553B - Equal-percent butterfly valve and control method thereof - Google Patents
Equal-percent butterfly valve and control method thereof Download PDFInfo
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- CN101929553B CN101929553B CN 201010283140 CN201010283140A CN101929553B CN 101929553 B CN101929553 B CN 101929553B CN 201010283140 CN201010283140 CN 201010283140 CN 201010283140 A CN201010283140 A CN 201010283140A CN 101929553 B CN101929553 B CN 101929553B
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Abstract
The invention relates to a butterfly valve, in particular to an equal-percent butterfly valve and a control method thereof. The invention mainly aims to overcome the defect of poor control precision of the equal-percent in the prior art so as to design an equal-percent butterfly valve which is close to a small-caliber equal-percent ball valve in the control precision. The equal-percent butterfly valve comprises a valve body, a shaft rod and a dish plate, the dish plate is provided with an upper valve shaft (7) and a lower valve shaft up and down, and the shaft rod is connected with the upper valve shaft; the equal-percent butterfly valve is characterized in that a front baffle and a back baffle are fixedly arranged in pipelines in the front and at the back of the dish plate, wherein the front baffle and the back baffle are arranged on the valve body, but not on the dish plate; and the front baffle and the back baffle must be arranged front and back; thus the effect of equal percent is realized.
Description
Technical field
The present invention relates to a kind of butterfly valve, relate in particular to a kind of equal-percent butterfly valve and controlling method thereof.
Background technique
Modulating valve can be divided into by the stroke characteristics: straight journey and angle stroke.The angle stroke comprises: butterfly valve, ball valve, camflex valve, full-function surperlight type modulating valve.The relative travel of equal percentage characteristics and the relative discharge relation of not forming straight line changes the flow that the variation of caused flow puts therewith at the every bit unit of the attending stroke of stroke and is directly proportional, and the percentage of changes in flow rate equates.So its advantage is a flow hour, changes in flow rate is little, and when flow was big, then changes in flow rate was big, just on different opening, had identical degree of regulation.What application was more at present is the equal percentage ball valve.But be applied to the equal percentage characteristics on the butterfly valve, because this body structure of butterfly valve has essence different with ball valve, so equal percentage is used not smooth.
The Dynamic Equilibrium Electrical Control Butterfly Gate of Chinese patent numbers 200520102631.0 for example; Its main contents are: comprise angle stroke YE, valve shaft, valve plate and valve body; The power unit of angle stroke YE is connected with valve plate through valve shaft, also respectively is provided with a port plate on two faces of said valve plate.The motorized adjustment butterfly valve that port plate is equipped with in employing is a kind of mortor operated valve with equal percent regulating characteristic, and controlling performance is good, uses very flexibly.But it mainly is on the dish version, to improve, and is different fully with the control mode of equal percentage ball valve, and the effect that therefore reaches also differs with the equal percentage ball valve to some extent.
Summary of the invention
The present invention mainly is to shortcomings such as equal percentage control accuracy differences in the existing technology, has designed the equal-percent butterfly valve that a kind of control accuracy approaches small-bore equal percentage ball valve.
Above-mentioned technical problem of the present invention is able to implement through following technological scheme.
Equal-percent butterfly valve comprises valve body, axostylus axostyle and dish plate, is arranged with valve shaft 7 and lower valve shaft on the dish plate, and axostylus axostyle is connected with last valve shaft, it is characterized in that flow-stopping plate and back flow-stopping plate before being set with in the pipeline before and after the dish plate.Flow-stopping plate and back flow-stopping plate and were arranged on the valve body, but not are arranged on the dish plate before flow-stopping plate was divided into, the corresponding setting before and after it is necessary for, its effect very to the effect that has reached equal percentage.
Described going up between valve shaft and the valve body is provided with sealing pair.
As preferably, be provided with double-sealing in the described sealing pair.Double sealing structure better forms sealing, and double-sealing is a dual torus.
As preferably, described before flow-stopping plate with afterwards the baffle plate structure is identical, and be that benchmark becomes the center to be symmetrical set with dish plate central point.According to the characteristic of butterfly valve itself, be the characteristic that the anti-mirror image in center is symmetrical set compound its equal percentage instruction with the dish plate.
As preferably, described before flow-stopping plate include flow blocking piece and pod apertures with the back flow-stopping plate.
As preferably, the pod apertures horizontal axis is symmetrical set.
As preferably, the inner radius of arc R1 of flow blocking piece is greater than or equal to the radius R 2 of butterfly plate.
As preferably, the pod apertures external frame is channelizing line (13), and channelizing line is benchmark with the medial axis, and a side is a semi-circle, and a side is multi-line section or curved section.
As preferably, channelizing line is laterally zygomorphic curved section.
The equal-percent butterfly valve controlling method; Its step comprises: axostylus axostyle angle of attachment stroke YE; Before flow-stopping plate be fixed on the valve body with the back flow-stopping plate, through the switch angle of control dish plate, form the flow control of equal percentage characteristics with the pod apertures on preceding flow-stopping plate, the back flow-stopping plate.Flow-stopping plate fixedly installs, and the pod apertures on the flow-stopping plate only needs the instruction flow-stopping plate can accomplish whole equal percentage setting for fixedly installing.Flow-stopping plate is because be installed on the valve body, so its dismounting is also very convenient.Butterfly plate begins to regulate when closing, and butterfly plate rotates toward semi-circle channelizing line opposite direction.
In sum, the present invention compares with existing technology and has following advantage.
The present invention is simple in structure; Be easy to realize, with respect to the equal percentage ball valve, on the bigger butterfly valve of relative size; Also realized the control of equal percentage; And with respect to flow-stopping plate directly is installed on the dish plate, before and after valve body, be mounted to the flow-stopping plate that anti-mirror image is provided with respectively, the equal percentage effect is greatly improved.Maintenance of the present invention is simple before also, because the flow-stopping plate of equal percentage control is arranged on the valve body, looks after and guides more simple.
Description of drawings
Fig. 1 is a front view sectional drawing of the present invention.
Fig. 2 is side view cross section figure of the present invention.
Fig. 3 is the front view of preceding flow-stopping plate of the present invention.
Fig. 4 is the side view of preceding flow-stopping plate of the present invention.
Fig. 5 is the front view of flow-stopping plate before the another kind of the present invention.
Label is among the figure: 1, axostylus axostyle, 2, sealing pair, 3, valve body, 4, preceding flow-stopping plate, 5, the dish plate, 6, the back flow-stopping plate, 7, go up valve shaft, 8, double-sealing, 9, lower valve shaft, 11, flow blocking piece, 12, pod apertures, 13, channelizing line.
Embodiment
Through embodiment,, do further bright specifically below to technological scheme of the present invention in conjunction with accompanying drawing.
Like Fig. 1, shown in Figure 2; Equal-percent butterfly valve of the present invention comprises valve body 3, axostylus axostyle 1 and dish plate 5, is arranged with valve shaft 7 and lower valve shaft 9 on the dish plate, and axostylus axostyle is connected with last valve shaft; It is characterized in that flow-stopping plate 4 and back flow-stopping plate 6 before being set with in the pipeline before and after the dish plate.Be provided with sealing pair 2 between last valve shaft and the valve body.Be provided with double-sealing 8 in the sealing pair.
Before flow-stopping plate with afterwards the baffle plate structure is identical, and be that the anti-mirror image in center is symmetrical set with the dish plate.
Like Fig. 3, shown in Figure 4, preceding flow-stopping plate includes flow blocking piece 11 and pod apertures 12 with the back flow-stopping plate.Pod apertures is an equal percentage shape shown in Figure 4.
The step of equal-percent butterfly valve controlling method comprises: axostylus axostyle angle of attachment stroke YE; Preceding flow-stopping plate is fixed on the valve body with the back flow-stopping plate; Through the switch angle of control dish plate, form the flow control of equal percentage characteristics with the pod apertures on preceding flow-stopping plate, the back flow-stopping plate.
Horizontal axis when installing on the flow blocking piece and butterfly plate butterfly plate axis are to vertical, and just vertical with valve rod, mounting type specifically can use mounting structures such as screw, if different control characteristics can directly be changed flow blocking piece, and the baffle hole inside perhaps revising.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (1)
1. equal-percent butterfly valve; Comprise valve body (3), axostylus axostyle (1) and dish plate (5), be arranged with valve shaft (7) and lower valve shaft (9) on the dish plate, axostylus axostyle is connected with last valve shaft; It is characterized in that, be set with preceding flow-stopping plate (4) and back flow-stopping plate (6) in the pipeline before and after the dish plate; Described going up between valve shaft and the valve body is provided with sealing pair (2); Be provided with double-sealing (8) in the sealing pair; Before flow-stopping plate with afterwards the baffle plate structure is identical, and be that benchmark becomes the center to be symmetrical set with dish plate central point; Preceding flow-stopping plate includes flow blocking piece (11) and pod apertures (12) with the back flow-stopping plate; The pod apertures horizontal axis is symmetrical set; The inner radius of arc R1 of flow blocking piece is greater than or equal to the radius R 2 of dish plate; The pod apertures external frame is channelizing line (13), and channelizing line is benchmark with the medial axis, and a side is a semi-circle, and a side is multi-line section or curved section; Channelizing line is laterally zygomorphic curved section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283140 CN101929553B (en) | 2010-09-16 | 2010-09-16 | Equal-percent butterfly valve and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283140 CN101929553B (en) | 2010-09-16 | 2010-09-16 | Equal-percent butterfly valve and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101929553A CN101929553A (en) | 2010-12-29 |
| CN101929553B true CN101929553B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010283140 Active CN101929553B (en) | 2010-09-16 | 2010-09-16 | Equal-percent butterfly valve and control method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105221817A (en) * | 2015-10-16 | 2016-01-06 | 歌思（天津）低温设备有限公司 | A kind of rock gas pneumatic ball valve switch speed control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826100Y (en) * | 2005-06-02 | 2006-10-11 | 沈新荣 | Dynamic balancing electric regulating butterfly valve |
| CN2849366Y (en) * | 2005-11-03 | 2006-12-20 | 沈新荣 | Adjustable electric ball valve with fluid distributing plate |
| CN201083271Y (en) * | 2007-09-29 | 2008-07-09 | 董映红 | Flow combing butterfly valve |
| CN201802883U (en) * | 2010-09-16 | 2011-04-20 | 杭州哲达科技股份有限公司 | Equal-percentage butterfly valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7264221B2 (en) * | 2005-09-19 | 2007-09-04 | Yeary & Associates, Inc. | Butterfly valve assembly with improved flow characteristics |
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2010
- 2010-09-16 CN CN 201010283140 patent/CN101929553B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826100Y (en) * | 2005-06-02 | 2006-10-11 | 沈新荣 | Dynamic balancing electric regulating butterfly valve |
| CN2849366Y (en) * | 2005-11-03 | 2006-12-20 | 沈新荣 | Adjustable electric ball valve with fluid distributing plate |
| CN201083271Y (en) * | 2007-09-29 | 2008-07-09 | 董映红 | Flow combing butterfly valve |
| CN201802883U (en) * | 2010-09-16 | 2011-04-20 | 杭州哲达科技股份有限公司 | Equal-percentage butterfly valve |
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| Publication number | Publication date |
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| CN101929553A (en) | 2010-12-29 |
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