Anti-rotation structure of high-frequency pneumatic ball valve

Abstract

The utility model relates to the technical field of valves, and provides an anti-rotation structure of a high-frequency pneumatic ball valve, which comprises a first female spigot, a second female spigot, a third female spigot and a fourth female spigot, the first male spigot is arranged on a second flange at the upper end of the valve cover; when the first flange is connected with the second flange, the first male spigot can be inserted into the first female spigot to be clamped and matched with the first female spigot so as to form first anti-rotation limiting. When the first flange is connected with the second flange, the first male seam allowance is clamped into the first female seam allowance to form a first anti-rotation limit, so that the first flange and the second flange cannot axially rotate relative to each other, and the situation that a connecting bolt between the first flange and the second flange is loosened when the pneumatic ball valve acts at high frequency is avoided; and therefore, the valve can be fully opened or fully closed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-frequency pneumatic ball valve anti-rotation structure. Background Art

[0002] A ball valve is a valve whose opening and closing part (ball) is driven by a valve stem and rotates around the axis of the ball valve. According to the driving method, it is divided into: pneumatic ball valve, electric ball valve and manual ball valve. It is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It is a new type of valve that has been widely used in recent years.

[0003] At present, the existing pneumatic ball valves specially used for polysilicon powder conveying systems have high switching frequency (about 20 times per hour) and short time due to work requirements, and are high-frequency operation valves. This high-frequency pneumatic ball valve has the following problems in operation:

[0004] 1. High-frequency switching action can easily cause the connecting bolts at the upper and lower flanges of the packing chamber in the valve cover to loosen;

[0005] 2. The valve stem is connected to the ball using a traditional square key, which will cause a gap during operation;

[0006] The above two points will make it impossible for the high-frequency pneumatic ball valve to be fully opened or fully closed during operation, seriously affecting the backflush effect of the polysilicon powder conveying system. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model provides a high-frequency pneumatic ball valve anti-rotation structure to solve the problem that the existing high-frequency pneumatic ball valve cannot be fully opened or fully closed during operation, seriously affecting the backblowing effect of the polysilicon powder conveying system.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A high-frequency pneumatic ball valve anti-rotation structure, comprising:

[0010] A first female stopper is provided on a first flange connected to the pneumatic actuator; and

[0011] A first male stop is provided on a second flange at the upper end of the valve cover;

[0012] Wherein, when the first flange is connected to the second flange, the first male stop can be inserted into the first female stop and snap-fitted therewith to form a first anti-rotation limiter.

[0013] In one embodiment disclosed in the present application, the cross section of the first female stopper is an L-shaped structure, extending along the chord direction of the first flange;

[0014] The first male stop is in a strip-shaped structure and extends along the chord direction of the second flange.

[0015] In one embodiment disclosed in the present application, two first female stoppers are symmetrically provided at an interval of 180° to form a first flange with a flat square structure;

[0016] Two of the first male ends are symmetrically arranged at an interval of 180° to form a second flange with a flat square structure.

[0017] In one embodiment disclosed in the present application, the second male stop is provided on the third flange at the lower end of the valve cover; and

[0018] The second female stop is arranged on the fourth flange of the valve body;

[0019] Wherein, when the third flange is connected to the fourth flange, the second male stop can be inserted into the second female stop and snap-fitted therewith to form a second anti-rotation limiter.

[0020] In one embodiment disclosed in the present application, the second male stopper is in a strip-shaped structure and extends along the chord direction of the third flange;

[0021] The cross section of the second female stop is L-shaped and extends along the chord direction of the fourth flange.

[0022] In one embodiment disclosed in the present application, two second male flanges are symmetrically provided at an interval of 180° to form a third flange of a flat square structure;

[0023] The second female stoppers are provided with two symmetrically spaced 180 degrees apart to form a fourth flange with a flat square structure.

[0024] In one embodiment disclosed in the present application, the valve stem, the lower end of which passes through the first flange, the valve cover and the fourth flange in sequence, and is provided with a special-shaped spline; and

[0025] A spherical body, the top of which is provided with a boss with a special-shaped countersunk hole;

[0026] Wherein, the special-shaped spline can be inserted into the special-shaped countersunk hole of the boss and snap-fitted therewith to form a third anti-rotation limiter.

[0027] In one embodiment disclosed in the present application, the special-shaped spline is mainly composed of a large cylinder and four small cylinders with the same axis;

[0028] The large cylinder is coaxial with the valve stem;

[0029] The four small cylinders are evenly distributed around the circumference of the axis of the large cylinder and are intersectingly connected with the latter.

[0030] Compared with the prior art, the beneficial effects of the utility model are:

[0031] 1. When the first flange is connected to the second flange, the first male stopper is inserted into the first female stopper to form a first anti-rotation limiter, which can prevent the first flange and the second flange from relative axial rotation, thereby preventing the connecting bolts between the first flange and the second flange from loosening when the pneumatic ball valve is operated at a high frequency, thereby ensuring that the valve can be fully opened or fully closed.

[0032] 2. When the third flange is connected to the fourth flange, the second male stop is inserted into the second female stop to form a second anti-rotation limiter, which can prevent the third flange and the fourth flange from relative axial rotation, thereby preventing the connecting bolts between the third flange and the fourth flange from loosening when the pneumatic ball valve is operated at a high frequency, thereby further ensuring that the valve can be fully opened or fully closed.

[0033] 3. The special-shaped spline is inserted into the special-shaped countersunk hole of the boss, which can increase the contact area and tightness between the valve stem and the ball, thereby avoiding the loose gap between the valve stem and the ball after high-frequency operation of the pneumatic ball valve, and then ensuring that the valve can be fully opened or fully closed again.

[0034] 4. The first to third anti-rotation limiters can prevent the connecting bolts at the upper and lower flanges of the packing chamber in the valve cover from loosening when the pneumatic ball valve is in high-frequency operation, thereby ensuring that the valve can be fully opened or fully closed to ensure the backblowing effect of the high-frequency pneumatic ball valve, reducing the open-loop risk caused by offline valve maintenance, and can effectively reduce the frequency of shutdowns and maintenance hours of personnel, thereby improving the stability of production operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0037] Figure 2 This is a schematic diagram of the explosion structure of the utility model after the ball and the valve stem are hidden;

[0038] Figure 3 for Figure 2 Schematic diagram of the main structure;

[0039] Figure 4 Schematic diagram of the three-dimensional structure of the valve stem;

[0040] Figure 5 Schematic diagram of the three-dimensional structure of a sphere. DETAILED DESCRIPTION

[0041] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0047] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0048] See also Figure 1 to Figure 5 As shown, the utility model provides a high-frequency pneumatic ball valve anti-rotation structure, comprising:

[0049] A first female stop 11 is provided on a first flange 10 connected to a pneumatic actuator (not shown in the figure); and

[0050] The first male stop 21 is provided on the second flange 22 at the upper end of the valve cover 20;

[0051] When the first flange 10 is connected to the second flange 22 , the first male stop 21 can be inserted into the first female stop 11 and snap-fitted therewith to form a first anti-rotation limiter.

[0052] Specifically, when the first flange 10 is connected to the second flange 22, the first male stop 21 is inserted into the first female stop 11 to form a first anti-rotation limiter, which can prevent the first flange 10 and the second flange 22 from relative axial rotation, thereby preventing the connecting bolts between the first flange 10 and the second flange 22 from loosening when the pneumatic ball valve is operated at a high frequency, thereby ensuring that the valve can be fully opened or fully closed.

[0053] The first female stop 11 has an L-shaped cross section and extends along the chord direction of the first flange 10 ; the first male stop 21 has a strip-shaped structure and extends along the chord direction of the second flange 22 .

[0054] See also Figure 2 and Figure 3 As shown, two first female stoppers 11 are symmetrically provided at an interval of 180° to form a first flange 10 of a flat square structure; two first male stoppers 21 are symmetrically provided at an interval of 180° to form a second flange 22 of a flat square structure.

[0055] The above-mentioned high-frequency pneumatic ball valve anti-rotation structure also includes:

[0056] The second male stop 23 is provided on the third flange 24 at the lower end of the valve cover 20; and

[0057] A second female stop 31 is provided on a fourth flange 30 of the valve body (not shown in the figure);

[0058] When the third flange 24 is connected to the fourth flange 30 , the second male stop 23 can be inserted into the second female stop 31 and snap-fitted therewith to form a second anti-rotation limiter.

[0059] Specifically, when the third flange 24 is connected to the fourth flange 30, the second male stop 23 is inserted into the second female stop 31 to form a second anti-rotation limit, which can prevent the third flange 24 and the fourth flange 30 from relative axial rotation, thereby preventing the connecting bolts between the third flange 24 and the fourth flange 30 from loosening when the pneumatic ball valve is operated at a high frequency, thereby further ensuring that the valve can be fully opened or fully closed.

[0060] The second male stop 23 is in a strip-shaped structure, extending along the chord direction of the third flange 24 ; the second female stop 31 has an L-shaped cross-section, extending along the chord direction of the fourth flange 30 .

[0061] See also Figure 2 and Figure 3 As shown, two second male stops 23 are symmetrically provided at an interval of 180° to form a third flange 24 of a flat square structure; two second female stops 31 are symmetrically provided at an interval of 180° to form a fourth flange 30 of a flat square structure.

[0062] See also Figure 1 , Figure 4 and Figure 5 As shown, the above-mentioned high-frequency pneumatic ball valve anti-rotation structure also includes:

[0063] The valve stem 40 has a lower end which passes through the first flange 10, the valve cover 20 and the fourth flange 30 in sequence and is provided with a special-shaped spline 41; and

[0064] The sphere 50 has a boss 51 with a special-shaped countersunk hole on its top;

[0065] The special-shaped spline 41 can be inserted into the special-shaped countersunk hole of the boss 51 and snap-fitted therewith to form a third anti-rotation limiter.

[0066] Specifically, the stuffing chamber is located between the inside of the valve cover 20 and the valve stem 40, and the special-shaped spline 41 is inserted into the special-shaped countersunk hole of the boss 51, which can increase the contact area and tightness between the valve stem 40 and the ball 50, thereby avoiding the generation of loose gaps between the valve stem 40 and the ball 50 after high-frequency operation of the pneumatic ball valve, and then ensuring again that the valve can be fully opened or fully closed.

[0067] In this embodiment, the special-shaped spline 41 is mainly composed of a large cylinder and four small cylinders with the same axis. The large cylinder is coaxial with the valve stem 40, and the four small cylinders are evenly distributed around the circumference of the large cylinder axis and intersectingly connected with the latter.

[0068] To sum up, the utility model can prevent the connecting bolts at the upper and lower flanges of the stuffing chamber in the valve cover 20 from loosening when the pneumatic ball valve is in high-frequency operation through the first to third anti-rotation limiters, thereby ensuring that the valve can be fully opened or fully closed to ensure the backblowing effect of the high-frequency pneumatic ball valve, reduce the open loop risk caused by offline valve maintenance, effectively reduce the frequency of shutdowns and personnel maintenance hours, and improve the stability of production operations.

[0069] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A high-frequency pneumatic ball valve anti-rotation structure, characterized in that: include: A first female stopper is provided on a first flange connected to the pneumatic actuator; and A first male stop is provided on a second flange at the upper end of the valve cover; Wherein, when the first flange is connected to the second flange, the first male stop can be inserted into the first female stop and snap-fitted therewith to form a first anti-rotation limiter.

2. The high-frequency pneumatic ball valve anti-rotation structure according to claim 1 is characterized in that: The first female stop has an L-shaped cross section and extends along the chord direction of the first flange; The first male stop is in a strip-shaped structure and extends along the chord direction of the second flange.

3. The high-frequency pneumatic ball valve anti-rotation structure according to claim 1 or 2, characterized in that: The first female stoppers are provided with two symmetrical first flanges spaced 180 degrees apart to form a first flange with a flat square structure; Two of the first male ends are symmetrically arranged at an interval of 180° to form a second flange with a flat square structure.

4. The high-frequency pneumatic ball valve anti-rotation structure according to claim 3 is characterized in that: Also includes: The second male stop is provided on the third flange at the lower end of the valve cover; and The second female stop is arranged on the fourth flange of the valve body; Wherein, when the third flange is connected to the fourth flange, the second male stop can be inserted into the second female stop and snap-fitted therewith to form a second anti-rotation limiter.

5. The high-frequency pneumatic ball valve anti-rotation structure according to claim 4 is characterized in that: The second male stop is in a strip-shaped structure and extends along the chord direction of the third flange; The cross section of the second female stop is L-shaped and extends along the chord direction of the fourth flange.

6. The high-frequency pneumatic ball valve anti-rotation structure according to claim 4 or 5, characterized in that: The second male stopper is provided with two symmetrical flanges spaced 180 degrees apart to form a third flange with a flat square structure; The second female stoppers are provided with two symmetrically spaced 180 degrees apart to form a fourth flange with a flat square structure.

7. The high-frequency pneumatic ball valve anti-rotation structure according to claim 6 is characterized in that: Also includes: A valve stem, the lower end of which passes through the first flange, the valve cover and the fourth flange in sequence and is provided with a special-shaped spline; and A spherical body, the top of which is provided with a boss with a special-shaped countersunk hole; Wherein, the special-shaped spline can be inserted into the special-shaped countersunk hole of the boss and snap-fitted therewith to form a third anti-rotation limiter.

8. The high-frequency pneumatic ball valve anti-rotation structure according to claim 7 is characterized in that: The special-shaped spline is mainly composed of a large cylinder and four small cylinders with the same axis. The large cylinder is coaxial with the valve stem; The four small cylinders are evenly distributed around the circumference of the axis of the large cylinder and are intersectingly connected with the latter.

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