Butterfly plate positioning mechanism for butterfly valve with detachable angle pin

Abstract

The utility model discloses a butterfly plate positioning mechanism for a butterfly valve with a detachable angle pin, which is characterized by comprising a positioning sleeve and a positioning pin, the positioning sleeve is transversely provided with a positioning pin mounting hole, the positioning pin comprises a first positioning area and a second positioning area, and the first positioning area is provided with a first positioning hole. The first positioning area extends into the positioning pin mounting hole to be matched with the positioning pin mounting hole, the upper side and the lower side of the first positioning area abut against the positioning pin mounting hole, and gaps are reserved between the left side and the right side of the first positioning area and the positioning pin mounting hole. According to the utility model, the gaps are reserved between the two sides of the positioning sleeve and the positioning pin, so that a micro-deformation space is reserved for the positioning pin when the valve rod rotates, the positioning pin is prevented from being subjected to shearing force, the safety is improved, the size of the positioning pin can be designed to be smaller, and meanwhile, the influence on the strength of the valve rod can be reduced.

Description

Technical Field

[0001] The utility model relates to a butterfly plate positioning mechanism for a detachable oblique pin butterfly valve. Background Art

[0002] There are currently two common butterfly plate positioning structures for oblique pin detachable butterfly valves: one is to install positioning bearings above and below the butterfly plate. This structure has high processing requirements, many processing steps, and the bearings are prone to wear; the other is to drill positioning pins on the butterfly plate and the valve stem. The advantage of this structure is the simple process, and the biggest disadvantage is that the positioning pin is easily affected by the torque when the valve is switched, resulting in a huge shear force on the positioning pin, which makes the positioning pin huge in size during design, seriously affecting the strength of the valve stem. Utility Model Content

[0003] In view of the above problems, the utility model provides a butterfly plate positioning mechanism for a detachable oblique pin butterfly valve, which effectively solves the problems pointed out in the background technology.

[0004] The technical solution adopted by the utility model is:

[0005] A butterfly plate positioning mechanism for a detachable butterfly valve with an oblique pin, characterized in that it includes a positioning sleeve and a positioning pin, the positioning sleeve is laterally provided with a positioning pin mounting hole, the positioning pin includes a first positioning area and a second positioning area, the first positioning area extends into the positioning pin mounting hole and matches the positioning pin mounting hole, the upper and lower sides of the first positioning area are against the positioning pin mounting hole, and a gap is left between the left and right sides and the positioning pin mounting hole.

[0006] Preferably, both upper and lower sides of the first positioning area are flat surfaces, and both left and right sides are arc surfaces convex outwards.

[0007] Preferably, the cross section of the positioning pin mounting hole is a rectangle with four rounded corners.

[0008] The utility model leaves a gap between the two sides of the locating sleeve and the locating pin, thereby leaving space for the locating pin to deform slightly when the valve stem rotates, thereby avoiding the locating pin from being subjected to shear force. This not only improves safety, but also allows the size of the locating pin to be designed to be smaller, while also reducing the impact on the strength of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 for Figure 1 AA cross-sectional structural diagram;

[0011] Figure 3 It is a structural schematic diagram of the positioning sleeve;

[0012] Figure 4 for Figure 3 The right side structural diagram of ;

[0013] Figure 5 This is a schematic diagram of the structure of the utility model installed on a butterfly valve;

[0014] Figure 6 for Figure 5 Enlarged view of part A. DETAILED DESCRIPTION

[0015] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0017] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" 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.

[0018] 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, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] 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.

[0021] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, a butterfly plate positioning mechanism for a detachable butterfly valve with an oblique pin includes a positioning sleeve 1 and a positioning pin 2. The positioning sleeve 1 is laterally provided with a positioning pin mounting hole 3. The positioning pin 2 includes a first positioning area 21 and a second positioning area 22. The first positioning area 21 extends into the positioning pin mounting hole 3 and matches the positioning pin mounting hole 3. The upper and lower sides of the first positioning area 21 are against the positioning pin mounting hole 3, and a gap 4 is left between the left and right sides and the positioning pin mounting hole 3.

[0023] The upper and lower sides of the first positioning area 21 are both planes, and the left and right sides are both arc surfaces convex outwards.

[0024] The cross section of the positioning pin installation hole 3 is a rectangle with four rounded corners.

[0025] like Figure 5The figure shows a schematic diagram of the structure of the utility model installed on a butterfly valve, in which the second positioning area 22 of the positioning pin 2 is fixed in the valve stem 7, and the first positioning area 21 extends into the positioning pin mounting hole 3 of the positioning sleeve 1, and the positioning sleeve 1 is fixed on the butterfly plate 5, and the valve stem 7 and the butterfly plate 5 are fixed to each other in the rotation direction by the bevel pin 6, and the utility model plays a longitudinal positioning role in the butterfly valve, and when the valve stem 7 drives the butterfly plate 5 to rotate, the positioning pin 2 will not be subjected to the shear force generated by the butterfly plate 5 on it, and under the action of torque when the butterfly valve is switched, the slight deformation of the positioning pin 2 along with the valve stem 7 is offset by the pre-reserved gap 4, and such a structure is safer when used, therefore, the positioning pin 2 is only subjected to the gravity of the butterfly plate 5, and is not affected by the torque when the butterfly valve is switched, and its size can be designed to be a smaller structure.

[0026] The utility model has few processing procedures, simple process requirements and few parts. During production, a positioning hole is pre-processed on the butterfly plate 5, and then a tool sleeve is used to punch a positioning hole on the valve stem 7 after the butterfly plate 5 and the valve stem 7 are assembled. The upper and lower planes of the positioning pin mounting hole 3 on the positioning sleeve 1 are matched with the upper and lower planes of the positioning pin 2. At the same time, a gap 4 is left between the left and right sides of the positioning pin mounting hole 3 on the positioning sleeve 1 and the positioning pin 2. Under the action of torque when the butterfly valve is switched, the positioning 2 is slightly deformed with the valve stem 7 and is offset by the pre-reserved gap 4.

[0027] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A butterfly plate positioning mechanism for a detachable oblique pin butterfly valve, characterized in that: The invention comprises a positioning sleeve (1) and a positioning pin (2), wherein the positioning sleeve (1) is provided with a positioning pin mounting hole (3) in a transverse direction, and the positioning pin (2) comprises a first positioning area (21) and a second positioning area (22), wherein the first positioning area (21) extends into the positioning pin mounting hole (3) and matches the positioning pin mounting hole (3), and the upper and lower sides of the first positioning area (21) are against the positioning pin mounting hole (3), and a gap (4) is left between the left and right sides and the positioning pin mounting hole (3).

2. A butterfly plate positioning mechanism for a detachable oblique pin butterfly valve according to claim 1, characterized in that: The upper and lower sides of the first positioning area (21) are both planes, and the left and right sides are both arc surfaces convex outwards.

3. The butterfly plate positioning mechanism for a detachable oblique pin butterfly valve according to claim 2, characterized in that: The cross section of the positioning pin installation hole (3) is a rectangle with four rounded corners.

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