CN111828704B - Cavitation-proof valve body structure - Google Patents
Cavitation-proof valve body structure Download PDFInfo
- Publication number
- CN111828704B CN111828704B CN202010778645.3A CN202010778645A CN111828704B CN 111828704 B CN111828704 B CN 111828704B CN 202010778645 A CN202010778645 A CN 202010778645A CN 111828704 B CN111828704 B CN 111828704B
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- China
- Prior art keywords
- molded line
- valve body
- line cylinder
- flow passage
- outer shell
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to an anti-cavitation valve body structure, which is characterized in that: comprises an outer shell and a molded line cylinder; the side walls of the middle flow passage of the valve body and the inner flow passage of the valve body are arranged in parallel, and the flow passages are in fillet transition, so that the design of an acute angle is avoided, the change of the flow passage direction is avoided from changing sharply, the change of the flow passage section is smooth, and the sudden change of the medium flowing direction and the sharp change of the channel shape and the channel section product are avoided, so that the fluid resistance, the corrosion and the erosion are reduced; valve parts are used as control elements of a fluid system, and the front end pressure is usually higher than the rear end pressure, and the position of a valve plate is the place where the internal pressure changes most severely; this is because at the valve plate position, the flow area decreases, and the fluid velocity necessarily increases if the same flow rate is passed, and an increase in fluid velocity causes a drop in fluid pressure; the flow area at the end is increased, which is helpful for reducing the fluid pressure, thereby effectively preventing the flow channel from cavitation erosion.
Description
Technical Field
The invention relates to the technical field of valve bodies, in particular to an anti-cavitation valve body structure.
Background
A complex flow channel structure exists in a valve body which is similar to a cylinder, and a cavitation phenomenon exists because the valve body is a metal forging.
Cavitation is the phenomenon of cavitation corrosion damage on the metal surface contacted with fluid under the conditions of high-speed flow and pressure change of the fluid. Due to the effect of atmospheric pressure, some air is dissolved inside any fluid. When dissolved air moves with the fluid, if the pressure of the fluid is lower than the vapor pressure of the liquid, the dissolved air is separated out in the form of bubbles. When the separated bubbles move to a place with higher fluid pressure, the bubbles are crushed, and the potential energy stored in the bubbles is converted into the kinetic energy of the fluid in a smaller volume by the crushing of the bubbles, so that fluid shock waves are formed in the fluid. The shock wave causes local plastic deformation inside the valve body flow passage, and local material fatigue and crack can be caused over time. Because the fluid is internally provided with fine particle impurities, the fluid can obtain certain kinetic energy under the action of shock waves to impact the inner wall of the flow channel, so that the corrosion speed of the inner wall is accelerated.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-cavitation valve body structure capable of preventing fine particle impurities from impacting the inner wall of a flow channel.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an anti-cavitation valve body structure which innovation point lies in: comprises an outer shell and a molded line cylinder;
the outer shell and the molded line barrel are both in cylindrical barrel structures, and a valve body outer flow passage penetrating through the outer shell is formed in the outer shell along the axis direction; the molded line cylinder comprises a first molded line cylinder and a second molded line cylinder, the first molded line cylinder and the second molded line cylinder are coaxially arranged in an outer shell, and the outer shell is wrapped on the inner wall of the first molded line cylinder, the outer wall of the second molded line cylinder, the upper end face and the lower end face; the outer diameter of the first molded line cylinder is smaller than the inner diameter of the second molded line cylinder; an annular valve body inner flow passage is formed between the outer diameter of the first molded line cylinder and the inner diameter of the second molded line cylinder; the top end of the first molded line cylinder is connected with the top end of the second molded line cylinder to realize the top end sealing of the flow channel in the valve body, and an opening is formed between the bottom end of the first molded line cylinder and the bottom end of the second molded line cylinder to realize the bottom end opening of the flow channel in the valve body;
furthermore, a plurality of valve body middle runners are formed in the first molded line cylinder body along the wall thickness direction, and the valve body middle runner group is communicated with the valve body inner runner and the valve body outer runner;
furthermore, the outer contour of an annular valve body inner flow channel formed between the outer diameter of the first molded line cylinder and the inner diameter of the second molded line cylinder is of a plurality of epsilon-shaped head-to-tail connection structures, and the joints of all sections of the epsilon-shaped head-to-tail connection structures are in fillet transition; the epsilon-shaped head-tail connection structure is sequentially composed of an upper end inclined section, a vertical transition section and a lower end inclined section, and the length of the upper end inclined section of the epsilon-shaped head-tail connection structure is greater than that of the lower end inclined section.
Furthermore, a plurality of lightening holes are formed in the position, close to the bottom end, of the side edge of the outer shell along the circumferential direction.
Furthermore, the valve body middle flow passage is provided with a plurality of flow passages which are arranged along the circumferential direction of the first molded line cylinder body at equal angles; the valve body middle flow channel comprises a pair of gaps penetrating through the wall thickness direction of the first molded line cylinder body, the gaps are parallel to each other and are arranged along the vertical direction, and the bottom ends of the gaps penetrate through the first molded line cylinder body.
Furthermore, the total length of the upper end inclined section and the vertical transition section of the epsilon-shaped head-tail connection structure is 4/5-9/10 of the integral length of the epsilon-shaped head-tail connection structure.
Furthermore, the distance between the vertical transition sections of the inner flow channel of the valve body is 5/21-2/7 of the length of the bottom edge of the outer flow channel of the valve body.
The invention has the advantages that:
1) the side walls of the middle flow passage of the valve body and the inner flow passage of the valve body are arranged in parallel, and the flow passages are in fillet transition, so that the design of an acute angle is avoided, the change of the flow passage direction is avoided from changing sharply, the change of the flow passage section is smooth, and the sudden change of the medium flowing direction and the sharp change of the channel shape and the channel section product are avoided, so that the fluid resistance, the corrosion and the erosion are reduced;
2) valve parts are used as control elements of a fluid system, and the front end pressure is usually higher than the rear end pressure, and the position of a valve plate is the place where the internal pressure changes most severely; this is because at the valve plate position, the flow area decreases, and the fluid velocity necessarily increases if the same flow rate is passed, and an increase in fluid velocity causes a drop in fluid pressure; the flow area at the end is increased, which is helpful for reducing the fluid pressure, thereby effectively preventing the flow channel from cavitation erosion.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an internal structural view of an anti-cavitation valve structure according to the present invention.
Fig. 2 is an internal cross-sectional view of an anti-cavitation valve body structure of the present invention.
Fig. 3 is a sectional view of a middle flow passage of a valve body of an anti-cavitation valve body structure according to the present invention.
Fig. 4 is a structural view of an inner flow passage of a valve body of an anti-cavitation valve body structure according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An anti-cavitation valve body structure as shown in fig. 1 to 4 includes an outer housing 1 and a molded line cylinder 2.
The outer shell 1 and the molded line barrel 2 are both in cylindrical barrel structures, and a valve body outer flow passage 3 penetrating through the outer shell is formed in the outer shell 1 along the axis direction; the molded line cylinder 2 comprises a first molded line cylinder 21 and a second molded line cylinder 22, the first molded line cylinder 21 and the second molded line cylinder 22 are coaxially arranged in the outer shell 1, and the outer shell 1 is wrapped on the inner wall of the first molded line cylinder 21, the outer wall of the second molded line cylinder 22 and the upper and lower end faces; the outer diameter of the first profile cylinder 21 is smaller than the inner diameter of the second profile cylinder 22; an annular valve body inner flow passage 4 is formed between the outer diameter of the first molded line cylinder 21 and the inner diameter of the second molded line cylinder 22; the top end of the first molded cylinder 21 is connected with the top end of the second molded cylinder 22 to realize the top end sealing of the valve body inner flow passage 4, and the bottom end of the valve body inner flow passage 4 is opened by an opening between the bottom end of the first molded cylinder 21 and the bottom end of the second molded cylinder 22.
The first molded line cylinder 21 is provided with a plurality of valve body middle flow passages 5 along the wall thickness direction, and the valve body middle flow passages 5 are communicated with the valve body inner flow passage 4 and the valve body outer flow passage 3.
The outer contour of the valve body inner flow passage 4 formed between the outer diameter of the first molded line cylinder 21 and the inner diameter of the second molded line cylinder 22 is a plurality of epsilon-shaped head-to-tail connection structures, and the joint of each section of the epsilon-shaped head-to-tail connection structures adopts fillet transition; the epsilon-shaped head-to-tail connection structure is sequentially composed of an upper end inclined section 41, a vertical transition section 42 and a lower end inclined section 43, and the length of the upper end inclined section 41 of the epsilon-shaped head-to-tail connection structure is larger than that of the lower end inclined section 43.
A plurality of lightening holes 11 are arranged on the side edge of the outer shell 1 close to the bottom end along the circumferential direction.
The valve body middle flow passage 5 is provided with a plurality of equal-angle arrangement along the circumferential direction of the first molded line cylinder 21; the valve body middle flow passage 5 comprises a pair of gaps penetrating through the wall thickness direction of the first molded cylinder body, the gaps are parallel to each other and are arranged along the vertical direction, and the bottom ends of the gaps penetrate through the first molded cylinder body 21.
The total length of an upper end inclined section 41 and a vertical transition section 42 of the epsilon-shaped head-to-tail connection structure is 4/5-9/10 of the integral length of the epsilon-shaped head-to-tail connection structure; in this embodiment, the overall length of the epsilon-shaped head-to-tail connection structure is 31.97mm, and the total length of the upper end inclined section 41 and the vertical transition section 42 of the epsilon-shaped head-to-tail connection structure is 26.97 mm.
The distance between the vertical transition sections of the valve body inner flow channel 4 is 5/21-2/7 of the length of the bottom edge of the valve body outer flow channel 3; in this embodiment, the length of the bottom edge of the valve body outer flow passage 3 is 42mm, and the distance between the vertical transition section 42 of the valve body middle flow passage 5 and the valve body inner flow passage 4 is 10 mm.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. An anti-cavitation valve body structure which is characterized in that: comprises an outer shell and a molded line cylinder;
the outer shell and the molded line barrel are both in cylindrical barrel structures, and a valve body outer flow passage penetrating through the outer shell is formed in the outer shell along the axis direction; the molded line cylinder comprises a first molded line cylinder and a second molded line cylinder, the first molded line cylinder and the second molded line cylinder are coaxially arranged in an outer shell, and the outer shell is wrapped on the inner wall of the first molded line cylinder, the outer wall of the second molded line cylinder, the upper end face and the lower end face; the outer diameter of the first molded line cylinder is smaller than the inner diameter of the second molded line cylinder; an annular valve body inner flow passage is formed between the outer diameter of the first molded line cylinder and the inner diameter of the second molded line cylinder; the top end of the first molded line cylinder is connected with the top end of the second molded line cylinder to realize the top end sealing of the flow channel in the valve body, and an opening is formed between the bottom end of the first molded line cylinder and the bottom end of the second molded line cylinder to realize the bottom end opening of the flow channel in the valve body;
the first molded line cylinder is provided with a plurality of valve body middle runners along the wall thickness direction, and the valve body middle runner group is communicated with the valve body inner runner and the valve body outer runner;
the outer contour of an annular valve body inner flow passage formed between the outer diameter of the first molded line cylinder and the inner diameter of the second molded line cylinder is of a plurality of epsilon-shaped head-to-tail connection structures, and the joint of each section of the epsilon-shaped head-to-tail connection structures adopts fillet transition; the epsilon-shaped head-tail connection structure sequentially comprises an upper end inclined section, a vertical transition section and a lower end inclined section, and the length of the upper end inclined section of the epsilon-shaped head-tail connection structure is greater than that of the lower end inclined section;
a plurality of lightening holes are formed in the side edge of the outer shell close to the bottom end along the circumferential direction;
the valve body middle flow passage is provided with a plurality of flow passages which are arranged along the circumferential direction of the first molded line cylinder in an equal angle manner; the valve body middle flow channel comprises a pair of gaps penetrating through the wall thickness direction of the first molded line cylinder body, the gaps are parallel to each other and are arranged along the vertical direction, and the bottom ends of the gaps penetrate through the first molded line cylinder body.
2. An anti-cavitation valve body structure according to claim 1, characterized in that: the total length of an upper end inclined section and a vertical transition section of the epsilon-shaped head-tail connection structure is 4/5-9/10 of the whole length of the epsilon-shaped head-tail connection structure.
3. An anti-cavitation valve body structure according to claim 1, characterized in that: the distance between the vertical transition sections of the inner flow channel of the valve body is 5/21-2/7 of the length of the bottom edge of the outer flow channel of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778645.3A CN111828704B (en) | 2020-08-05 | 2020-08-05 | Cavitation-proof valve body structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778645.3A CN111828704B (en) | 2020-08-05 | 2020-08-05 | Cavitation-proof valve body structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111828704A CN111828704A (en) | 2020-10-27 |
| CN111828704B true CN111828704B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010778645.3A Active CN111828704B (en) | 2020-08-05 | 2020-08-05 | Cavitation-proof valve body structure |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6394134B1 (en) * | 1998-07-14 | 2002-05-28 | Kab-Ju Kwon | Control valve trim for high-pressure fluid flow |
| CN2530109Y (en) * | 2001-12-27 | 2003-01-08 | 工装自控工程（无锡）有限公司 | High pressure-gradient valve |
| CN101140032A (en) * | 2006-09-05 | 2008-03-12 | 中核苏阀科技实业股份有限公司 | Flash evaporation prevention valve |
| CN104819147A (en) * | 2015-04-24 | 2015-08-05 | 吴忠中创自控阀有限公司 | Online replacement pressure loss part valve |
| CN206310066U (en) * | 2016-12-21 | 2017-07-07 | 苏州艾尔泰流体控制有限公司 | A kind of valve element, valve and water-carriage system |
| CN209196273U (en) * | 2018-12-07 | 2019-08-02 | 无锡斯考尔自动控制设备有限公司 | A kind of cage guiding type regulating valve |
| CN209262394U (en) * | 2018-10-31 | 2019-08-16 | 维都利阀门有限公司 | Special material cavitation-preventive low noise adjustable valve |
-
2020
- 2020-08-05 CN CN202010778645.3A patent/CN111828704B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6394134B1 (en) * | 1998-07-14 | 2002-05-28 | Kab-Ju Kwon | Control valve trim for high-pressure fluid flow |
| CN2530109Y (en) * | 2001-12-27 | 2003-01-08 | 工装自控工程（无锡）有限公司 | High pressure-gradient valve |
| CN101140032A (en) * | 2006-09-05 | 2008-03-12 | 中核苏阀科技实业股份有限公司 | Flash evaporation prevention valve |
| CN104819147A (en) * | 2015-04-24 | 2015-08-05 | 吴忠中创自控阀有限公司 | Online replacement pressure loss part valve |
| CN206310066U (en) * | 2016-12-21 | 2017-07-07 | 苏州艾尔泰流体控制有限公司 | A kind of valve element, valve and water-carriage system |
| CN209262394U (en) * | 2018-10-31 | 2019-08-16 | 维都利阀门有限公司 | Special material cavitation-preventive low noise adjustable valve |
| CN209196273U (en) * | 2018-12-07 | 2019-08-02 | 无锡斯考尔自动控制设备有限公司 | A kind of cage guiding type regulating valve |
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| Publication number | Publication date |
|---|---|
| CN111828704A (en) | 2020-10-27 |
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