CN214662196U - Gasket for ball valve and ball valve - Google Patents
Gasket for ball valve and ball valve Download PDFInfo
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- CN214662196U CN214662196U CN202120717298.3U CN202120717298U CN214662196U CN 214662196 U CN214662196 U CN 214662196U CN 202120717298 U CN202120717298 U CN 202120717298U CN 214662196 U CN214662196 U CN 214662196U
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Abstract
The utility model relates to a gasket for ball valve, which is cylindrical and is provided with a through hole along the direction of the cylindrical axis; the through hole is in a herringbone shape, the minimum opening position of the herringbone shape is a convex first arc, the maximum opening position of the herringbone shape is a convex second arc, and an inwards concave arc surface is arranged on one side of the gasket. The utility model has the advantages that the herringbone ceramic wafer is arranged, so that the processing on the metal valve core is avoided, the processing flow is simplified, the cost is saved, and the processing consistency is enhanced; by adopting the herringbone through holes, the small-opening of the herringbone through holes is an inscribed circle, and the diameter of the inscribed circle is preferably 1/10 of the diameter of the circumscribed circle with the maximum opening. The area of the through hole changes greatly when the opening degree is small and changes slightly when the opening degree is large. When the opening degree is small, the flow area is large, and the defect of sharp whistle at the acute angle of the V-shaped through hole is overcome.
Description
Technical Field
The utility model belongs to the technical field of flow control equipment and accessory, concretely relates to gasket and novel ball valve for the ball valve.
Background
The V-shaped ball valve has high adjustable ratio, and can realize the adjustment of the flow rate approaching to linearity from large to small through adjusting the opening of the valve, thereby being widely applied.
In the scheme of patent CN 210949990U a novel V type flow control ball valve, add the gasket through at metal valve core both ends, process on the gasket of end of intaking, process out V style of calligraphy through-hole to reach flow control's purpose. In the scheme, the V-shaped tip machined on the gasket has a small acute angle, the opening degree is small, and a squeaking sound is generated when the flow speed of the fluid is high; in addition, in terms of flow regulation, the valve opening plays a role in flow regulation in the area of the V-shaped opening S1 (shown in fig. 1), and assuming that the triangular bottom of the fan-shaped hole of the V-shaped valve is d, the height is h, the side is r, the area is S1, the vertex angle is θ, and the vertex angle θ and the side r are fixed values. Since the valve is opened and closed, it reciprocates from the 0 point along the X axis, and the area of the triangle is expressed as a function of X. r and theta are selected constants. The area S1 of the triangular region is expressed as:
the area function is a linear function of the argument xHowever, since the flow rate and the flow area of the same valve are approximately linearly proportional to each other under ideal conditions, the flow rate variation with opening degree of the valve is in accordance with the variation of the opening area with x, and is a linear relationship, so that the flow rate variation and the opening degree are approximately linearly related (as shown in fig. 2 b). Especially when the valve is applied to pipeline flow regulation, the heat dissipating capacity/refrigerating capacity and the flow change of the regulating system are in a lower parabolic characteristic (as shown in fig. 2 a), so that the actual regulating effect is approximate to a quick opening type (as shown in fig. 2 c), and therefore, the actual flow regulating curve of the V-shaped valve is not appropriate, and the valve is difficult to play a good regulating role in practical application.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model provides an it flows effectual gasket for ball valve and uses the ball valve of this kind of gasket to transfer.
A gasket for a ball valve is cylindrical, and a through hole is formed in the direction of the axis of the cylindrical body; the through hole is in a herringbone shape, the minimum opening position of the herringbone shape is a convex first arc, the maximum opening position of the herringbone shape is a convex second arc, and an inwards concave arc surface is arranged on one side of the gasket.
On the basis of the scheme, the diameter of the first circular arc is 1/20-1/5, preferably 1/10, of the diameter of the second circular arc.
On the basis of the scheme, two sides of the through hole in the shape of the Chinese character 'ren' are inwards concave curves.
On the basis of the scheme, the other side of the gasket is provided with an annular boss coaxial with the cylindrical gasket.
On the basis of the scheme, the gasket is made of ceramic or polytetrafluoroethylene.
A ball valve comprises a first valve body, a second valve body, a valve core ball and a valve rod, wherein the first valve body is in threaded connection with the second valve body, a water flow channel is formed between the first valve body and the second valve body, and the valve core ball is arranged between the first valve body and the second valve body; the valve rod is matched with the valve core ball, and the valve core ball is driven to rotate through the rotation of the valve rod so as to realize flow regulation; the valve core ball is provided with a cylindrical through hole, one side of the valve core ball is provided with a first gasket, the other side of the valve core ball is provided with a second gasket, and the inner side of the second gasket is provided with an arc-shaped surface matched with the spherical surface of the valve core ball; the first gasket and the second gasket are respectively connected with the corresponding first valve body and the second valve body in a sealing way through sealing rings; the first gasket is cylindrical, and a through hole is formed in the direction of the axis of the cylindrical gasket; the through hole is in a herringbone shape, the minimum opening position of the herringbone shape is a convex first arc, the maximum opening position of the herringbone shape is a convex second arc, and one side of the gasket is provided with a concave arc surface; the cambered surface is matched with the spherical surface of the valve core ball.
On the basis of the scheme, the diameter of the first circular arc is 1/20-1/5, preferably 1/10, of the diameter of the second circular arc.
On the basis of the scheme, two sides of the through hole in the shape of the Chinese character 'ren' are inwards concave curves.
On the basis of the scheme, the other side of the first gasket is provided with an annular boss coaxial with the first gasket.
On the basis of the scheme, the aperture area of the herringbone through hole accounts for 3/5-3/4 of the aperture area of the cylindrical through hole.
The utility model has the advantages that:
the utility model has the advantages that the herringbone ceramic wafer is arranged, so that the processing on the metal valve core is avoided, the processing flow is simplified, the cost is saved, and the processing consistency is enhanced; by adopting the herringbone through holes, the small-opening of the herringbone through holes is an inscribed circle, and the diameter of the inscribed circle is preferably 1/10 of the diameter of the circumscribed circle with the maximum opening. The area of the through hole changes greatly when the opening degree is small and changes slightly when the opening degree is large. When the opening degree is small, the flow area is large, and the defect of sharp whistle at the acute angle of the V-shaped through hole is overcome.
Drawings
FIG. 1 is a schematic view of a flow area of a V-shaped flow channel;
FIG. 2 is a characteristic diagram of V-shaped flow channel flow regulation;
FIG. 3 is a characteristic diagram of the flow regulation of the herringbone flow channel of the present invention;
FIG. 4 is a schematic view of a herringbone flow channel flow area;
FIG. 5 is a schematic view of a slope of a first arc of the herringbone flow channel;
FIG. 6 is a schematic perspective view of a gasket according to example 1;
FIG. 7 is a schematic perspective view of the other side of the gasket according to example 1;
FIG. 8 is a schematic view of the gasket of embodiment 1;
FIG. 9 is a schematic view of the overall structure of the ball valve according to embodiment 2;
FIG. 10 is a schematic cross-sectional view taken along line A-A of FIG. 9;
fig. 11 is a schematic view of an exploded structure of the ball valve according to embodiment 2.
Detailed Description
The terms used in the present invention have the meanings commonly understood by those of ordinary skill in the art, unless otherwise specified.
The present invention will be described in further detail with reference to the following data in conjunction with specific embodiments. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
Referring to fig. 6 to 8, a gasket for a ball valve is illustrated, wherein the gasket is cylindrical and is provided with a through hole 51 along the direction of the axis of the cylindrical shape; the through hole 51 is in a herringbone shape, the minimum opening position of the herringbone shape is a convex first circular arc 52, the maximum opening position of the herringbone shape is a convex second circular arc 53, and a concave cambered surface 55 is arranged on one side of the gasket.
Preferably, the diameter of the first circular arc 52 is 1/20-1/5 of the diameter of the second circular arc 53, and preferably, the diameter of the first circular arc 52 is 1/10 of the diameter of the second circular arc 53.
Preferably, the diameter of the second circular arc 53 is smaller than the diameter of the gasket.
Preferably, the two sides 54 of the through hole 51 in the shape of a Chinese character 'ren' are curved inwardly.
As a preferred scheme, the other side of the gasket is provided with an annular boss 56 which is coaxial with the cylindrical gasket, the thickness of the boss 56 is not less than the thickness of the body of the gasket, and the raised thickening step is arranged on the gasket, so that the strength of the herringbone flow channel can be increased, the water flow impact resistance of the herringbone flow channel is improved, and the deformation of the herringbone flow channel is ensured;
the gasket is made of ceramic or polytetrafluoroethylene.
Example 2
Referring to fig. 9 to 11, a ball valve is illustrated, wherein the gasket (in this embodiment, the first gasket 5) of embodiment 1 is used, and comprises a first valve body 1, a second valve body 2, a spool ball 3 and a valve rod 4, wherein the first valve body 1 is in threaded connection with the second valve body 2, a water flow channel is formed between the first valve body 1 and the second valve body 2, the spool ball 3 is arranged between the first valve body 1 and the second valve body 2, the valve rod 4 is connected with the spool ball 3, and the spool ball 3 is driven to rotate by the rotation of the valve rod 4 to realize flow regulation; the valve core ball 3 is provided with a cylindrical through hole 31, one side of the valve core ball 3 is provided with a first gasket 5, the other side of the valve core ball 3 is provided with a second gasket 6, and the inner side of the second gasket 6 is provided with an arc-shaped surface matched with the spherical surface of the valve core ball 3; the first gasket 5 and the second gasket 6 are respectively connected with the corresponding first valve body 1 and the second valve body 2 in a sealing way through a sealing ring 7; the arc surface 55 matches the spherical surface of the valve core ball 3. 6, the first gasket 5 and the second gasket 6 are respectively connected with the first valve body 1 and the second valve body 2 in a sealing way through corresponding sealing rings 8.
Preferably, the diameter of the first circular arc 52 is 1/10 of the diameter of the second circular arc 53.
Preferably, the diameter of the second circular arc 53 is smaller than the diameter of the first gasket 5.
Preferably, the two sides 54 of the through hole 51 in the shape of a Chinese character 'ren' are curved inwardly.
As a preferred solution, the other side of said first gasket 5 is provided with an annular boss 56 coaxial with the cylindrical first gasket 5.
Preferably, the second gasket 6 is made of ceramic or teflon.
In order to detect the temperature and/or pressure in the channel, a first detection channel 71 is arranged on the first valve body 1, a second detection channel 72 is arranged on the valve core ball 3, the first detection channel 71 corresponds to the second detection channel 72 after the ball valve is installed, and a temperature sensor and/or a pressure sensor can be installed in the first detection channel 71 and the second detection channel 72; if no sensor is used, the first detection channel 71 can be blocked off using the bolt 7.
The area of the through hole 51 changes along with the opening degree, when the opening degree is small, the flow area is the area clamped by the inscribed circle 52 along the X-axis direction, the area change rate is approximate to the slope of an inscribed circle curve, the slope is larger as the position is closer to the point O (see the change of the slope of the tangent line in figure 5, and tends to be infinite at the point O), so that when the opening degree is small, the flow area quickly reaches the limit area of the inscribed circle, and the defects that when the opening degree at the acute angle of the V-shaped through hole is small, the flow area is too small and the sharp noise appears at the acute angle are overcome; meanwhile, in the aspect of flow regulation, the valve opening degree plays a role in flow regulation at the part of the herringbone opening S1 (as shown in FIG. 4), in an adjustable area of the herringbone opening interval, a coordinate 0 point is located on a coaxial tangent of the center of a semicircular tangent circle of the herringbone valve, and the curved side r1 of the herringbone valve has the following curve equation:
the curved equation of the curved side r2 of the human-shaped valve is as follows:
in both equations, a and h are selected constants. Since the valve is opened and closed, and reciprocates from the 0 point along the X axis, the area of the human valve should be expressed as a function of X. The area of the half-circle is negligible, and the area of the "man" shaped area of the man-shaped valve, S1, can be expressed as:
the area function is a logarithmic function of the independent variable x, and because the flow rate and the flow area of the same valve are in approximate linear proportional relation under ideal conditions, the flow rate of the valve changes along with the opening degree and the opening holeThe area is consistent with the change of x and is logarithmic, i.e. equal percentage relation, so that the relation between the valve opening and the flow is equal percentage characteristic (as shown in fig. 3 b), and particularly when the area is applied to pipeline flow regulation, the heat radiation amount/cooling amount and the flow change of a regulation system are lower parabolic characteristic (as shown in fig. 3 a), so that the regulation characteristic of the valve is equal percentage characteristic change in actual flow regulation. Thus, as shown in fig. 3, the regulation characteristic is the best, and the optimal solution, in the practical application of flow regulation, as long as the valve chevron curve is selected appropriately.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (12)
1. A gasket for a ball valve is cylindrical, and is provided with a through hole (51) along the direction of the axis of the cylinder; the gasket is characterized in that the through hole (51) is in a herringbone shape, the minimum opening of the herringbone shape is a convex first arc (52), the maximum opening of the herringbone shape is a convex second arc (53), and a concave arc surface (55) is arranged on one side of the gasket.
2. Gasket for ball valves according to claim 1, characterized in that the diameter of the first circular arc (52) is 1/20-1/5 of the diameter of the second circular arc (53).
3. Gasket for ball valves according to claim 2, characterized in that the diameter of the first circular arc (52) is 1/10 of the diameter of the second circular arc (53).
4. Gasket for ball valves according to claim 1, characterized in that the two sides (54) of the through hole (51) in the shape of a herringbone are curved inwardly.
5. Gasket for a ball valve according to claim 1, characterized in that the other side of the gasket is provided with an annular boss (56) coaxial with the cylindrical gasket.
6. The gasket for a ball valve according to claim 1, wherein said gasket is made of ceramic or teflon.
7. A ball valve comprises a first valve body (1), a second valve body (2), a valve core ball (3) and a valve rod (4), wherein the first valve body (1) is in threaded connection with the second valve body (2), a water flow channel is formed between the first valve body (1) and the second valve body (2), and the valve core ball (3) is arranged between the first valve body (1) and the second valve body (2); the valve rod (4) is matched with the valve core ball (3), and the valve core ball (3) is driven to rotate through the rotation of the valve rod (4) to realize flow regulation; a cylindrical through hole (31) is formed in the valve core ball (3), a first gasket (5) is arranged on one side of the valve core ball (3), a second gasket (6) is arranged on the other side of the valve core ball (3), and an arc-shaped surface matched with the spherical surface of the valve core ball (3) is arranged on the inner side of the second gasket (6); the first gasket (5) and the second gasket (6) are respectively connected with the corresponding first valve body (1) and the second valve body (2) in a sealing way through a sealing ring (7); characterized in that the first gasket (5) is the gasket of claim 1, and the cambered surface (55) is matched with the spherical surface of the valve core ball (3).
8. The ball valve according to claim 7, characterized in that the diameter of the first circular arc (52) is 1/20-1/5 of the diameter of the second circular arc (53).
9. The ball valve according to claim 8, characterized in that the diameter of the first circular arc (52) is 1/10 of the diameter of the second circular arc (53).
10. The ball valve according to claim 7, characterized in that the two sides (54) of the through hole (51) in the shape of a herringbone are curved inwardly.
11. A ball valve according to claim 7, characterized in that the other side of the first gasket (5) is provided with an annular boss (56) coaxial with the first gasket (5).
12. The ball valve according to claim 7, wherein the aperture area of the herringbone through hole (51) occupies 3/5-3/4 of the aperture area of the cylindrical through hole (31).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021203586392 | 2021-02-09 | ||
| CN202120358639 | 2021-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214662196U true CN214662196U (en) | 2021-11-09 |
Family
ID=78460299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120717298.3U Active CN214662196U (en) | 2021-02-09 | 2021-04-09 | Gasket for ball valve and ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214662196U (en) |
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2021
- 2021-04-09 CN CN202120717298.3U patent/CN214662196U/en active Active
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