CN115585279A - Tiny flow regulating valve for capillary channel gas - Google Patents
Tiny flow regulating valve for capillary channel gas Download PDFInfo
- Publication number
- CN115585279A CN115585279A CN202211206501.6A CN202211206501A CN115585279A CN 115585279 A CN115585279 A CN 115585279A CN 202211206501 A CN202211206501 A CN 202211206501A CN 115585279 A CN115585279 A CN 115585279A
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- valve
- cylindrical surface
- capillary
- valve core
- valve body
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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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
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/065—Construction of housing; Use of materials therefor of taps or cocks with cylindrical plugs
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/12—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a capillary channel gas micro-flow regulating valve, which belongs to the technical field of flow regulating valves and comprises a valve body, a valve core, a valve cover and a hand wheel, wherein the valve core is matched and connected with the valve body, the valve cover is fixed on the valve body, the cylindrical surface of the valve core comprises a capillary groove part, an integral groove part and a sealing part, a plurality of parallel capillary grooves are circumferentially arranged on the cylindrical surface of the valve core, the inner cylindrical surface of the valve body is matched with the outer cylindrical surface of the valve core to form a plurality of parallel capillary channels, the tail end opening of each capillary channel is communicated with the integral groove part, and the integral groove part is communicated with an outlet flow channel of the valve body. When the valve works, airflow enters from one side of the valve and flows out from the other side of the valve after flowing through the capillary channel, and the length and the number of the capillary channels in a working state can be changed by rotating the hand wheel, so that the flow of the gas flowing through the valve is changed. The regulating characteristics of the regulating valve in small opening degree and large opening degree range can be greatly changed, and the regulating valve has the characteristics of large flow regulating range and stable and reliable regulating performance.
Description
Technical Field
The invention relates to the technical field of flow regulating valves, in particular to a capillary channel gas micro flow regulating valve.
Background
The gas micro-flow regulating valve is widely applied to the fields of semiconductors, pharmacy, chemical engineering and the like. The working principle of the existing flow regulating valve is that the size of the flow area of a valve port is changed by changing the position of a valve core, so that the passing flow is changed. For a micro flow regulating valve, the valve port is small in size, the effective regulating distance is short, and the problems of narrow effective regulating range, large return deviation, non-linear regulation and the like generally exist.
The regulating valve can be divided into manual, electric and pneumatic according to different driving modes. In an automatic flow control system, an electric control valve is used more frequently. Since the flow rate is not only related to the valve opening, but also related to factors such as the physical properties of the fluid medium and the driving differential pressure, feedback control is generally required for flow rate adjustment. Because the existing micro flow regulating valve has the defects of narrow regulating range, large return deviation and the like, stable and reliable flow regulation is difficult to realize.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a capillary channel gas micro flow regulating valve.
The technical scheme of the invention is as follows: the valve core is matched and connected with the valve body, the valve cover is fixed on the valve body, the inner side of the valve body is a cylindrical surface, the axis of the cylindrical surface is perpendicular to the axis of the valve, the inlet and outlet flow channel is in a long strip shape at the cylindrical surface, the valve core is a cylinder, the cylindrical surface of the valve core comprises a capillary groove part, an integral groove part and a sealing part, a plurality of parallel capillary grooves are circumferentially arranged on the cylindrical surface of the valve core, the inner cylindrical surface of the valve body is matched with the outer cylindrical surface of the valve core to form a plurality of parallel capillary channels, the tail end openings of the capillary channels are communicated with the integral groove part, and the integral groove part is communicated with an outlet flow channel of the valve body.
The length of the integral groove of the valve core is 1/2 of the circumference of the cylindrical surface of the valve core, and the depth of the integral groove is 2-6 times of that of the capillary groove.
The length of the sealing part of the cylindrical surface of the valve core is 1/12 of the total circumferential length of the cylindrical surface, and the length is larger than the width of an opening of the inlet flow passage of the valve body at the cylindrical surface.
The lengths of all the capillary grooves on the valve core are different and are sequentially arranged according to the length, the longest length is not more than 5/12 of the cylindrical surface of the valve core, the shortest length is about 1/4 of the circumference of the cylindrical surface of the valve core, the depth and the width of the capillary grooves are equivalent, and the tail ends of the capillary grooves are flush and connected with the integral grooves.
The tail end of each capillary groove on the valve core is in a gradually expanding shape.
The sealing part of the valve core is provided with a sealing groove, a sealing strip is arranged in the sealing groove, and the sealing strip is tightly contacted with the inner cylindrical surface of the valve body.
The valve cover is fixed on the valve body through a bolt, sealing filler is arranged between the valve cover and the valve core, and the sealing filler is tightly pressed by the valve cover.
The valve body is characterized in that a conical pit is arranged in the center of the bottom surface inside the valve body, a conical protrusion is arranged in the center of the bottom of the valve core, and the conical pit and the conical protrusion are matched with each other.
And a hand wheel is arranged at the top of the valve core.
The invention has the beneficial effects that:
1) The length and the number of the capillary channels are changed to change the impedance of the valve, the length of the capillary channels is reduced along with the increase of the opening degree of the valve, the number of the capillary channels is increased, the impedance of the valve is reduced, and the wide-range flow regulation can be realized.
2) At the stage of small opening degree, the number of the communicated capillary channels is small, the valve resistance is large, when the number is not changed, the flow rate and the opening degree are in inverse proportion, and precise adjustment can be realized at the time of small opening degree.
3) The total stroke of the valve is not more than 1/2 week, the relation between the opening and the rotation angle is simple and clear, and the repeatability of the opening of the valve is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a valve body;
FIG. 4 is a schematic structural view of a valve body;
FIG. 5 is a schematic structural view of the valve cartridge;
FIG. 6 is a schematic view of the valve core in the direction A;
FIG. 7 is a schematic cross-sectional view of the valve cartridge B-B;
FIG. 8 is an expanded plan view of the cylindrical surface of the valve core;
in the figure: 1-a valve body; 2-a valve core; 3-valve cover; 4-a hand wheel; 5-a bolt; 6-sealing packing; 7-sealing strips; 8-conical protrusion; 9-capillary groove portions; 10-an integral recessed portion; 11-a sealing portion; 12-capillary grooves; 13-an integral groove; 14-a seal groove; 15-a gradually expanding groove; 16-conical projection.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-4, a capillary channel gas micro-flow regulating valve comprises a valve body 1, a valve core 2, a valve cover 3, a hand wheel 4, a bolt 5, a sealing filler 6 and a sealing strip 7, wherein the valve core 2 is connected with the valve body 1 in a matching manner, the valve cover 3 is fixed on the valve body 1, the hand wheel 4 is arranged at the top of the valve core 2, the valve cover 3 is fixed on the valve body 1 through the bolt 5, the sealing filler 6 is arranged between the valve cover 3 and the valve core 2, and the sealing filler 6 is compressed by the valve cover 3 to achieve a sealing effect.
As shown in fig. 5-8, the inner side of the valve body 1 is a cylindrical surface, the axis of the cylindrical surface is perpendicular to the axis of the valve, and the inlet and outlet flow passages are elongated at the cylindrical surface. The valve core 2 is a cylinder, the cylindrical surface of the valve core 2 comprises a capillary groove part 9, an integral groove part 10 and a sealing part 11, a plurality of parallel capillary grooves 12 are formed in the circumferential direction of the cylindrical surface of the valve core 2, the inner cylindrical surface of the valve body 1 is matched with the outer cylindrical surface of the valve core 2 to form a plurality of parallel capillary channels, the tail end openings of the capillary channels are communicated with the integral groove part 10, and the integral groove part 10 is communicated with the outlet flow channel of the valve body 1.
The length of the integral groove of the valve core 2 is 1/2 of the circumference of the cylindrical surface of the valve core, and the depth of the integral groove is 2-6 times of that of the capillary groove 12.
The length of the cylindrical sealing part 11 of the valve core is about 1/12 of the total circumferential length of the cylindrical surface, and the length is required to be larger than the width of the opening of the inlet flow passage of the valve body at the cylindrical surface so as to ensure that complete sealing can be realized. The valve core cylindrical surface sealing part 11 is provided with a sealing groove 14 along the cylindrical surface in the longitudinal direction, a sealing strip 7 is arranged in the sealing groove 14, and the sealing strip 7 is tightly contacted with the inner cylindrical surface of the valve body after the valve is assembled, so that the air flow is prevented from directly entering the integral groove 13 without passing through a capillary channel to cause the internal leakage of the valve. The lengths of the capillary grooves 12 on the valve core 2 are different, and the capillary grooves are sequentially arranged according to the length, the longest length does not exceed 5/12 of the cylindrical surface of the valve core, the shortest length is about 1/4 of the circumference of the cylindrical surface of the valve core, the depths and the widths of the capillary grooves 12 are equivalent, the tail ends of the capillary grooves are gradually widened, and the tail ends of the capillary grooves are flush and communicated with the integral grooves. The length of the integral groove part 10 is 1/2 of the circumference of the cylindrical surface of the valve core, and the depth is gradually increased from front to back and is 2-6 times of the depth 12 of the capillary groove.
The center of the bottom surface in the valve body 1 is provided with a conical pit, the center of the bottom of the valve core 2 is provided with a conical protrusion 16, the conical pit is matched with the conical protrusion 16, and the conical pit and the conical protrusion are matched with each other to reduce the friction force between the bottom and the valve body when the valve core rotates.
The length and the number of the capillary channels in the working state can be changed by rotating the handwheel 4. The rotation range of the valve core 2 is about 1/2 of a circle, the valve can be in a turn-off or connection state by rotating the hand wheel 4 to adjust the relative positions of the valve core 2 and the valve body 1, namely when the sealing part of the valve core 2 is in the opening position of the inlet flow passage of the valve body, the valve is turned off, and when the capillary groove part of the valve core 2 is in the opening position of the inlet flow passage of the valve body 1, the valve is in the connection state. The total stroke of the valve is not more than 1/2 week, the relation between the opening and the rotation angle is simple and clear, and the repeatability of the opening of the valve is good.
When the valve works, airflow enters from one side of the valve and flows out from the other side of the valve after flowing through the capillary channel, and the length and the number of the capillary channels in a working state can be changed by rotating the hand wheel 4, so that the flow of the gas flowing through the valve is changed. When the valve works, the capillary channels sequentially enter a connection state from long to short along with the increase of the opening degree of the valve, the length of the working sections of the capillary channels is gradually shortened, the flow impedance of the valve is reduced, and the flow capacity is increased, so that the effect of flow regulation is achieved. In the stage of small opening degree, the number of the communicated capillary channels is small, the valve resistance is large, when the number is unchanged, the flow rate and the opening degree are in inverse proportion, and precise adjustment can be realized in the case of small opening degree. The regulating characteristics of the regulating valve in small opening degree and large opening degree range can be greatly changed, and the regulating valve has the characteristics of large flow regulating range and stable and reliable regulating performance.
Analyzing the valve characteristics according to the laminar flow of the flow in the capillary channel:
when the valve opening is x, the flow through the valve is:
wherein n is the number of capillary channels; d is the capillary channel diameter; l max Maximum capillary channel length (opening x = 0); x is the opening degree and is defined as the length of an axis rotated by the valve core; μ is the hydrodynamic viscosity.
At the time of the maximum opening degree,
in the formula I min The length of the capillary channel when the valve is opened to the maximum.
When the number of capillary channels is not changed,
in the formula, X is the maximum opening degree.
Equation (4) shows that the relative flow change caused by the relative opening change of the valve is not in a direct proportion relation with the relative flow at the point, namely, the valve is not an equal percentage type regulating valve. As the valve opening x increases, the relative flow changes faster. When the number of the capillary channels changes, namely, as the opening degree of the valve increases, the number of the capillary channels also increases, the flow rate changes more quickly. The regulating valve according to the invention can therefore be designed with the following characteristics: at small opening, the valve characteristic is close to equal percentage type, and in large opening range, the regulating valve changes faster than equal percentage regulating valve.
The invention is to be considered as limited only by the spirit and scope of the appended claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The utility model provides a little flow control valve of capillary passage gas, includes valve body (1), case (2) and valve gap (3), case (2) are connected with valve body (1) cooperation, and valve gap (3) are fixed on valve body (1), its characterized in that: the inner side of the valve body (1) is a cylindrical surface, the axis of the cylindrical surface is perpendicular to that of the valve, the inlet and outlet flow channels are long-strip-shaped on the cylindrical surface, the valve core (2) is a cylinder, the cylindrical surface of the valve core (2) comprises a capillary groove part (9), an integral groove part (10) and a sealing part (11), a plurality of parallel capillary grooves (12) are formed in the circumferential direction of the cylindrical surface of the valve core (2), the inner cylindrical surface of the valve body (1) is matched with the outer cylindrical surface of the valve core (2) to form a plurality of parallel capillary channels, the tail end of each capillary channel is opened and communicated with the integral groove part (10), and the integral groove part (10) is communicated with the outlet flow channel of the valve body (1).
2. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the length of the integral groove of the valve core (2) is 1/2 of the circumference of the cylindrical surface of the valve core, and the depth of the integral groove is 2-6 times of that of the capillary groove (12).
3. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the length of the sealing part (11) on the cylindrical surface of the valve core is 1/12 of the total circumferential length of the cylindrical surface, and the length is larger than the width of an opening of the inlet flow passage of the valve body on the cylindrical surface.
4. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the lengths of the capillary grooves (12) on the valve core (2) are different, the capillary grooves are sequentially arranged according to the length, the longest length does not exceed 5/12 of the cylindrical surface of the valve core, the shortest length is about 1/4 of the circumference of the cylindrical surface of the valve core, the depths and the widths of the capillary grooves (12) are equivalent, and the tail ends of the capillary grooves (12) are flush and connected with the integral grooves (13).
5. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the tail ends of all the capillary grooves (12) on the valve core (2) are in a gradually expanding shape.
6. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: a sealing part of the valve core (2) is provided with a sealing groove (14), a sealing strip (7) is installed in the sealing groove (14), and the sealing strip (7) is in tight contact with the inner cylindrical surface of the valve body (1).
7. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the valve cover (3) is fixed on the valve body (1) through a bolt (5), a sealing filler (6) is arranged between the valve cover (3) and the valve core (2), and the sealing filler (6) is compressed by the valve cover (3).
8. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the valve is characterized in that a conical pit is arranged in the center of the bottom surface in the valve body (1), a conical protrusion (16) is arranged in the center of the bottom of the valve core (2), and the conical pit is matched with the conical protrusion (16).
9. The fine channel gas minute flow rate regulating valve according to claim 1, characterized in that: the top of the valve core (2) is provided with a hand wheel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211206501.6A CN115585279A (en) | 2022-09-28 | 2022-09-28 | Tiny flow regulating valve for capillary channel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211206501.6A CN115585279A (en) | 2022-09-28 | 2022-09-28 | Tiny flow regulating valve for capillary channel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115585279A true CN115585279A (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211206501.6A Pending CN115585279A (en) | 2022-09-28 | 2022-09-28 | Tiny flow regulating valve for capillary channel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115585279A (en) |
-
2022
- 2022-09-28 CN CN202211206501.6A patent/CN115585279A/en active Pending
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