CN109780228B - Butterfly valve with adjustable internal bypass - Google Patents
Butterfly valve with adjustable internal bypass Download PDFInfo
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- CN109780228B CN109780228B CN201910166779.7A CN201910166779A CN109780228B CN 109780228 B CN109780228 B CN 109780228B CN 201910166779 A CN201910166779 A CN 201910166779A CN 109780228 B CN109780228 B CN 109780228B
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Abstract
The invention provides a butterfly valve with an adjustable internal bypass, which comprises a butterfly valve body, wherein the butterfly valve body is divided into two areas, namely a valve body inner chamber A and a valve body inner chamber B; the valve seat of the cavity A in the valve body is matched with the butterfly plate A, the valve seat of the cavity B in the valve body is matched with the butterfly plate B, the butterfly plate A is connected with the valve rod A, and the butterfly plate B is connected with the valve rod B; the valve rod A and the valve rod B are nested, and the valve rod A rotates in the valve rod B to realize the adjustment of the opening degree of the butterfly valve. According to the novel butterfly valve structure with the internal bypass adjusting characteristic, which is provided by the invention, a special valve rod form is controlled through two different sets of executing mechanisms, so that the flow linear adjustment of the butterfly valve under the small opening degree can be realized. The device has simple structure and reliable performance, and is suitable for being widely popularized and used.
Description
Technical Field
The invention relates to a butterfly valve, in particular to a butterfly valve with an adjustable internal bypass, and belongs to the technical field of fluid control valves.
Background
With the development of society, the level of industrial control technology is continuously improved, and the application requirements and the function implementation of valves applied to certain special occasions are diversified.
For the reformation of medium-low pressure communicating pipes implemented in the heat supply reformation of the low-pressure cylinder cut-off by the power plant in recent years, a control steam inlet valve needs to be arranged at a key medium-outlet or low-pressure cylinder inlet. The linearity of the flow regulation characteristic corresponding to the common butterfly valve product at the middle opening (30% -70%) is good, and the flow regulation performance is poor at the small opening or the large opening, and the vibration and noise of the valve body are also caused. Therefore, the existing butterfly valve products cannot meet the requirements of the application conditions.
Disclosure of Invention
The invention aims to solve the technical problems that: how to realize the linear flow regulation of the butterfly valve under the small opening degree.
In order to solve the technical problems, the technical scheme of the invention is to provide a butterfly valve with an adjustable internal bypass, which is characterized in that: the butterfly valve comprises a butterfly valve body, wherein the butterfly valve body is divided into two areas of a valve body inner cavity A and a valve body inner cavity B; the valve seat of the cavity A in the valve body is matched with the butterfly plate A, the valve seat of the cavity B in the valve body is matched with the butterfly plate B, the butterfly plate A is connected with the valve rod A, and the butterfly plate B is connected with the valve rod B; the valve rod A and the valve rod B are nested, and the valve rod A rotates in the valve rod B to realize the adjustment of the opening degree of the butterfly valve.
Preferably, the valve body inner chamber A and the valve body inner chamber B are integrally cast.
Preferably, the valve body inner chamber a is of a large round structure with one end concave inwards, the valve body inner chamber B is of a small round structure, and the valve body inner chamber B is arranged in the concave part of the valve body inner chamber a.
Preferably, the valve rod A comprises a circular main body, and the top of the circular main body is provided with convex teeth; a circular cavity is formed in the valve rod B, and an arc-shaped circumferential tooth slot is formed in the top of the circular cavity; the valve rod A is nested in the valve rod B, and the convex teeth at the top of the valve rod A are matched with the circumferential tooth grooves in the valve rod B.
More preferably, the circumferential spline is 90 ° arcuate.
Preferably, the valve rod A is connected with the actuating mechanism A, and the valve rod B is connected with the actuating mechanism B.
More preferably, the actuating mechanism A and the actuating mechanism B are symmetrically arranged at two ends of the butterfly valve body and are parallel to the butterfly valve body.
Preferably, the butterfly valve has 3 different states, as follows:
1) The butterfly plate A is fully closed, the butterfly plate B is fully closed, and the whole butterfly valve is in a fully closed state;
2) The butterfly plate A is fully opened, the butterfly plate B is fully opened, and the whole butterfly valve is in a fully opened state;
3) The butterfly plate A is fully closed, the butterfly plate B is fully opened, and the whole butterfly valve is in an internal bypass small opening state.
More preferably, when the butterfly valve is in the fully closed state, the adjustment from the fully closed state to the fully open state is performed in two ways:
1. the valve rod A is switched to a full-open state through forward rotation of the valve rod A in the valve rod B, and as the valve rod A is nested in the valve rod B, the butterfly plate B can be driven to synchronously rotate along with the butterfly plate A to realize the opening of the full-caliber valve;
2. the valve rod B is switched to an internal bypass small opening state after forward rotation, and then is switched to a full opening state after forward rotation of the valve rod A in the valve rod B.
Furthermore, when the corresponding fluid needs to be cut off in emergency, the valve rod A is driven to reversely rotate only by the valve rod B, and the valve rod A can be in a fully closed state.
According to the novel butterfly valve structure with the internal bypass adjusting characteristic, which is provided by the invention, a special valve rod form is controlled through two different sets of executing mechanisms, so that the flow linear adjustment of the butterfly valve under the small opening degree can be realized. The device has simple structure and reliable performance, and is suitable for being widely popularized and used.
Drawings
FIG. 1 is a schematic view of a butterfly valve with an adjustable internal bypass according to the present embodiment;
FIG. 2 is an axial cross-sectional view of the valve body inner chamber A;
FIG. 3 is an axial cross-sectional view of the valve body inner chamber B;
FIG. 4 is a schematic diagram of a butterfly valve with an adjustable internal bypass according to the present embodiment; (a) the valve body inner chamber a is fully closed; (B) the valve body inner chamber B is fully closed; (c) butterfly valve full closing position;
FIG. 5 is a fully open schematic view of a butterfly valve with an adjustable internal bypass according to the present embodiment; (a) the valve body internal chamber a is fully open; (B) the valve body internal chamber B is fully open; (c) fully opening the butterfly valve;
FIG. 6 is a schematic diagram of a small-caliber inner bypass of a butterfly valve with an adjustable inner bypass according to the present embodiment; (a) the valve body inner chamber a is fully closed; (B) the valve body internal chamber B is fully open; (c) bypass small caliber opening degree in the butterfly valve;
FIG. 7 is a schematic diagram of a butterfly valve from fully closed to fully open; (a) butterfly valve full closing position; (b) butterfly valve full open position;
FIG. 8 is a schematic diagram of the butterfly valve from fully closed to the inner bypass small aperture and finally to fully open; (a) butterfly valve full closing position; (b) bypass small caliber opening degree in butterfly valve; (c) fully opening the butterfly valve;
reference numerals illustrate:
1-an actuator A; 2-an actuator B; 3-a valve body; 4-a valve body inner chamber A; 5-a valve body inner chamber B; 6-valve rod A; 7-valve stem B; 8-a butterfly plate A; 9-butterfly plate B.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Fig. 1 is a schematic diagram of a butterfly valve with an adjustable internal bypass according to the present embodiment, where the butterfly valve with the adjustable internal bypass includes a butterfly valve body, and the internal part of the butterfly valve body is divided into two areas, i.e. a valve body inner chamber A4 and a valve body inner chamber B5, and the butterfly valve body is cast as a whole. The valve body inner cavity A4 is of a large round structure with the concave lower end, the valve body inner cavity B5 is of a small round structure, and the valve body inner cavity B5 is arranged in the concave lower end of the valve body inner cavity A4.
The valve seat of the cavity A4 in the valve body is matched with the butterfly plate A8, the valve seat of the cavity B5 in the valve body is matched with the butterfly plate B9, the butterfly plate A8 is connected with the valve rod A6, the butterfly plate B9 is connected with the valve rod B7, and the valve rod A6 and the valve rod B7 are of shaft sleeve shaft structures.
Referring to fig. 2 and 3, the valve stem A6 includes a circular body with teeth on the top. The valve rod B7 is internally provided with a circular cavity, and the top of the circular cavity is provided with a 90-degree circumferential tooth slot. The valve rod A6 is nested in the valve rod B7, and the valve rod A6 is matched with a 90-degree circumferential tooth socket in the valve rod B7 through a top convex tooth. The valve body inner chamber A4 and the valve body inner chamber B5 can be controlled by the valve rod A6 at the same time, and the valve body inner chamber B5 is controlled by the valve rod B7. In fig. 2 and 3, L represents a medium flow direction.
The valve rod A6 is connected with the actuating mechanism A1, the valve rod B7 is connected with the actuating mechanism B2, the actuating mechanism A1 and the actuating mechanism B2 are symmetrically arranged at two ends of the valve rod and are parallel to the valve body.
With reference to fig. 4 to 6, the butterfly valve with an adjustable internal bypass according to the present embodiment may have 3 different states, as follows:
1) Butterfly plate a fully closed, butterfly plate B fully closed (fully closed): at this time, as can be seen from the sectional view of fig. 4, the valve rod a is in the position of +90°, and the valve rod B is in the position of +90°;
2) Full-open butterfly plate a and full-open butterfly plate B (full-open): at this point, as can be seen in the cross-sectional view of fig. 5, valve stem a is in the 0 ° position and valve stem B is in the 0 ° position;
3) Butterfly plate a fully closed and butterfly plate B fully open (small caliber inner bypass): at this point, it can be seen from the cross-sectional view of fig. 6 that valve stem a is in the 90 ° position and valve stem B is in the 0 ° position.
Fig. 7 is a schematic diagram showing the direct conversion of the butterfly valve from the fully closed state to the fully open state, and the process is as follows:
when the butterfly valve is in the fully closed state, the butterfly valve can be switched to the fully open state after the valve rod A rotates 90 degrees clockwise, the valve rod A is nested in the valve rod B, and the butterfly plate B can be driven to synchronously rotate along with the butterfly plate A so as to realize the opening of the full-caliber valve.
In the process, from the state of full closing to the state of full opening, the valve can be directly and smoothly completed by the rotation of the valve rod A. When the emergency situation is met and corresponding fluid needs to be intercepted, the special shaft sleeve shaft structure can drive the valve rod A to rotate anticlockwise by 90 degrees only by means of the valve rod B, so that the valve rod A is in a fully closed state.
Fig. 8 shows the butterfly valve being shifted from the fully closed state to the inner bypass small opening state and then to the fully open state. The process is as follows:
when the butterfly valve is in the fully closed state, the butterfly valve can be switched to the inner bypass small opening state after the valve rod B rotates 90 degrees clockwise, and the valve rod B is used for driving the butterfly plate B to regulate the small-caliber inner bypass flow. At this time, the butterfly valve is in a small-caliber opening adjustment mode, and allows a small part of fluid to pass through the valve body inner cavity B with a smaller caliber.
When the butterfly valve is in the state of small opening of the internal bypass, the butterfly valve can be switched to the fully-opened state after rotating 90 degrees clockwise through the valve rod A, namely the full valve is opened, at the moment, the butterfly valve can be smoothly transited from the small-caliber opening to the mode of 100% large-caliber opening, and at the moment, all fluid media pass through the inner cavity A, B of the full-caliber valve body.
In the process, from the fully closed state, the transition to the small-caliber opening degree is realized through the rotation of the valve rod B, and the transition to the large-caliber opening degree is realized through the rotation of the valve rod A, so that the fully opened state is smoothly completed. When the emergency situation is met and corresponding fluid needs to be intercepted, the special shaft sleeve shaft structure can drive the valve rod A to rotate anticlockwise by 90 degrees only by means of the valve rod B, so that the valve rod A is in a fully closed state.
It should be understood that references to upper, lower, left, right, front, rear, front, back, top, bottom, etc. in this specification or as may be referred to are intended to be defined with respect to the configurations shown in the various figures, as opposed to concepts, which may be adapted for use in a variety of different positions and in a variety of different orientations. These and other directional terms should not be construed as limiting terms.
While the invention has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and additions may be made without departing from the scope of the invention. Equivalent embodiments of the present invention will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a butterfly valve from adjustable internal bypass in area which characterized in that: the butterfly valve comprises a butterfly valve body, wherein the butterfly valve body is divided into two areas of a valve body inner chamber A (4) and a valve body inner chamber B (5); a butterfly plate A (8) is matched with the valve seat of the valve body inner chamber A (4), a butterfly plate B (9) is matched with the valve seat of the valve body inner chamber B (5), the butterfly plate A (8) is connected with the valve rod A (6), and the butterfly plate B (9) is connected with the valve rod B (7); the valve rod A (6) and the valve rod B (7) are nested, and the valve rod A (6) rotates in the valve rod B (7) to realize the adjustment of the opening of the butterfly valve; the valve body inner chamber A (4) is of a large round structure with one end concave inwards, the valve body inner chamber B (5) is of a small round structure, and the valve body inner chamber B (5) is arranged in the concave part of the valve body inner chamber A (4); the valve rod A (6) comprises a circular main body, and convex teeth are arranged at the top of the circular main body; a circular cavity is formed in the valve rod B (7), and an arc-shaped circumferential tooth slot is formed in the top of the circular cavity; the valve rod A (6) is nested in the valve rod B (7), and convex teeth at the top of the valve rod A (6) are matched with circumferential tooth grooves in the valve rod B (7).
2. A butterfly valve with an adjustable internal bypass as recited in claim 1, wherein: the valve body inner chamber A (4) and the valve body inner chamber B (5) are integrally cast.
3. A butterfly valve with an adjustable internal bypass as recited in claim 1, wherein: the circumferential tooth groove is in a 90-degree arc shape.
4. A butterfly valve with an adjustable internal bypass as recited in claim 1, wherein: the valve rod A (6) is connected with the executing mechanism A (1), and the valve rod B (7) is connected with the executing mechanism B (2).
5. A self-contained adjustable internal bypass butterfly valve according to claim 4, wherein: the actuating mechanism A (1) and the actuating mechanism B (2) are symmetrically arranged at two ends of the butterfly valve body and are parallel to the butterfly valve body.
6. A butterfly valve with an adjustable internal bypass as recited in claim 1, wherein: the butterfly valve has 3 different states, as follows:
1) The butterfly plate A (8) is fully closed, the butterfly plate B (9) is fully closed, and the whole butterfly valve is in a fully closed state;
2) The butterfly plate A (8) is fully opened, the butterfly plate B (9) is fully opened, and the whole butterfly valve is in a fully opened state;
3) The butterfly plate A (8) is fully closed, the butterfly plate B (9) is fully opened, and the whole butterfly valve is in an internal bypass small opening state.
7. A self-contained adjustable internal bypass butterfly valve according to claim 6, wherein: when the butterfly valve is in the fully closed state, the regulation from the fully closed state to the fully open state is carried out in two specific ways:
1. the valve rod A (6) is switched to a full-open state through forward rotation of the valve rod A (7), and as the valve rod A (6) is nested in the valve rod B (7), the butterfly plate B (9) can be driven to synchronously rotate along with the butterfly plate A (8) to realize the opening of the full-caliber valve;
2. the valve rod B (7) is switched to an inner bypass small opening state after forward rotation, and then the valve rod A (6) is switched to a full opening state after forward rotation in the valve rod B (7).
8. A self-contained adjustable internal bypass butterfly valve according to claim 7, wherein: when the corresponding fluid is required to be cut off in emergency, the valve rod A (6) is driven to reversely rotate only by the valve rod B (7), and the valve rod A can be in a fully closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166779.7A CN109780228B (en) | 2019-03-06 | 2019-03-06 | Butterfly valve with adjustable internal bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166779.7A CN109780228B (en) | 2019-03-06 | 2019-03-06 | Butterfly valve with adjustable internal bypass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109780228A CN109780228A (en) | 2019-05-21 |
| CN109780228B true CN109780228B (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910166779.7A Active CN109780228B (en) | 2019-03-06 | 2019-03-06 | Butterfly valve with adjustable internal bypass |
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| Country | Link |
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| CN (1) | CN109780228B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081188A (en) * | 2019-05-23 | 2019-08-02 | 国电科学技术研究院有限公司 | A kind of Steam Turbine Through IP Admission butterfly valve |
| CN113124177A (en) * | 2021-04-09 | 2021-07-16 | 西安西热节能技术有限公司 | Double-regulating mechanism valve suitable for large-caliber small-flow regulation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0942533A (en) * | 1995-07-31 | 1997-02-14 | Tomoe Gijutsu Kenkyusho:Kk | Butterfly valve having main valve and auxiliary valve |
| CN2752557Y (en) * | 2004-10-15 | 2006-01-18 | 蔺荣春 | Improved sructure of hard-sealing butterfly valve |
| CN105240545A (en) * | 2015-10-31 | 2016-01-13 | 河北工业大学 | Dual-drive friction-free hard-seal butterfly valve |
| CN105240543A (en) * | 2015-11-17 | 2016-01-13 | 天津市卡尔斯阀门有限公司 | Novel butterfly valve |
| CN209875971U (en) * | 2019-03-06 | 2019-12-31 | 上海发电设备成套设计研究院有限责任公司 | Butterfly valve with adjustable inner bypass |
-
2019
- 2019-03-06 CN CN201910166779.7A patent/CN109780228B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0942533A (en) * | 1995-07-31 | 1997-02-14 | Tomoe Gijutsu Kenkyusho:Kk | Butterfly valve having main valve and auxiliary valve |
| CN2752557Y (en) * | 2004-10-15 | 2006-01-18 | 蔺荣春 | Improved sructure of hard-sealing butterfly valve |
| CN105240545A (en) * | 2015-10-31 | 2016-01-13 | 河北工业大学 | Dual-drive friction-free hard-seal butterfly valve |
| CN105240543A (en) * | 2015-11-17 | 2016-01-13 | 天津市卡尔斯阀门有限公司 | Novel butterfly valve |
| CN209875971U (en) * | 2019-03-06 | 2019-12-31 | 上海发电设备成套设计研究院有限责任公司 | Butterfly valve with adjustable inner bypass |
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| CN109780228A (en) | 2019-05-21 |
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Effective date of registration: 20200525 Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Applicant after: SHANGHAI POWER EQUIPMENT Research Institute Applicant after: KAIFENG POWER GENERATION BRANCH OF HENAN ELECTRIC POWER CO.,LTD., STATE POWER INVESTMENT Corp. Applicant after: State Power Investment Group Henan Electric Power Co.,Ltd. Address before: No. 1115 Jianchuan Road, Minhang District, Shanghai 201100 Applicant before: SHANGHAI POWER EQUIPMENT Research Institute Applicant before: KAIFENG POWER GENERATION BRANCH OF HENAN ELECTRIC POWER CO.,LTD., STATE POWER INVESTMENT Corp. |
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