Pneumatic butterfly valve

Abstract

The pneumatic butterfly valve comprises a valve body, a valve rod and a pneumatic device, the pneumatic device comprises an air cylinder and a transmission rod, the transmission rod is connected with the valve rod, a threaded rod is connected to the left end of a threaded pipe in an inserted mode, a bearing is fixedly arranged at the position, close to the right end, of the edge of the outer side of the threaded pipe in a sleeved mode, and a fixing shaft movably penetrates through adjacent flange holes. According to the pneumatic butterfly valve, in the using process, when an external pipeline needs to be connected with the valve body, a flange plate of the external pipeline is moved, the flange plate of the external pipeline is placed on the inner sides of the three limiting plates, the three limiting plates limit the flange plate of the external pipeline, and at the moment, the flange plate of the external pipeline corresponds to a flange plate of the valve body; and then the fixing bolts penetrate through the flange plate of the valve body and the flange holes in the flange plate of the external pipeline, so that connection of the external pipeline and the valve body is completed, the device can be conveniently installed by a single person, and the labor cost during installation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a pneumatic butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the switch control of low-pressure pipeline media. It refers to a valve with a closing member as a disc that rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling on the pipeline. The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve stem to open and close to achieve the enabling action. It is mainly used as a shut-off valve, and can also be designed to have the function of regulating or section valve and regulating. The main advantages of the pneumatic butterfly valve are simple structure, small size, light weight, and low cost. This feature is particularly significant for the pneumatic butterfly valve. The existing butterfly valve needs to be fixed to the pipeline by bolts during use, but during the installation process, the valve needs to be aligned with the pipeline, and then the bolts and nuts need to be matched. During installation, a single person cannot operate at the same time, resulting in an increase in installation costs. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a pneumatic butterfly valve.

[0004] One of the purposes of the utility model is achieved by the following technical solution:

[0005] A pneumatic butterfly valve comprises a valve body, a valve stem and a pneumatic device, wherein the pneumatic device comprises a cylinder and a transmission rod, and the transmission rod is connected to the valve stem. The outer edge of the valve body is fixedly sleeved with flanges near the left and right sides, and the flanges are provided with four flange holes. The outer edge of the valve body is provided with three threaded tubes, and a threaded rod is inserted into the left end of the threaded tube. A bearing is fixedly sleeved at the outer edge of the threaded tube near the right end, and the right side of the bearing and the left end of the threaded rod are fixedly connected to a limit plate, and the inner side of the limit plate is fixedly connected to a fixed shaft.

[0006] Furthermore, two operating rods are fixedly connected to the outer edge of the threaded tube, and the two operating rods are symmetrically arranged up and down with the central axis of the threaded tube as the symmetry axis.

[0007] Furthermore, the fixed shaft movably passes through the adjacent flange holes, and the fixed shaft and the flange holes match each other.

[0008] Furthermore, the threaded tube and the threaded rod are threadedly connected, and the threaded tube and the threaded rod match each other.

[0009] Furthermore, an anti-skid pad is fixedly connected to the inner side of the limit plate, and the anti-skid pad is in contact with a side of the flange close to the valve body.

[0010] Furthermore, the cross section of the limiting plate is U-shaped, and the U-shaped opening faces the flange.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model is a pneumatic butterfly valve. During use, when it is necessary to connect an external pipe to a valve body, the flange of the external pipe is moved and placed on the inner side of three limit plates. The three limit plates limit the flange of the external pipe. At this time, the flange of the external pipe corresponds to the flange of the valve body. Then, the fixing bolts are passed through the flange holes on the flange of the valve body and the flange of the external pipe to complete the connection between the external pipe and the valve body. The device can be easily installed by a single person, reducing the labor cost during installation;

[0013] 2. The utility model provides a pneumatic butterfly valve. During use, the limit plate of the device can be disassembled. When disassembling, it is only necessary to drive the threaded tube to rotate through the operating rod. The threaded tube rotates in the inner cavity of the threaded rod and the bearing. The threaded rod moves toward the inner cavity of the threaded tube under the action of the thread, thereby reducing the distance between the two limit plates, so that the limit plate drives the anti-slip pad away from the flange. In this way, the limit plate can be removed and installed on the valve body to be installed with the external pipeline, which greatly improves the application range of the device.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 A three-dimensional diagram of a flange component of the utility model;

[0017] Figure 3 It is a stereoscopic view of the threaded pipe component of the utility model.

[0018] Numbers in the figure: 1. valve body; 2. pneumatic device; 3. flange; 4. flange hole; 5. limit plate; 6. fixed shaft; 7. anti-slip pad; 8. threaded rod; 9. threaded pipe; 10. operating lever; 11. bearing; 12. valve stem. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0020] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] See also Figure 1-3 The utility model provides a technical solution: a pneumatic butterfly valve, including a valve body 1, a valve stem 12 and a pneumatic device 2, the pneumatic device 2 includes a cylinder and a transmission rod, and the transmission rod is connected to the valve stem 12, the outer edge of the valve body 1 is fixedly sleeved with a flange 3 near the left and right sides, and the flange 3 is provided with four flange holes 4, the outer edge of the valve body 1 is provided with three threaded tubes 9, and the outer edge of the threaded tube 9 is fixedly connected to two operating rods 10, and the two operating rods 10 are symmetrically arranged up and down with the central axis of the threaded tube 9 as the symmetry axis, and the left end of the threaded tube 9 is plugged with a threaded rod 8 The threaded tube 9 and the threaded rod 8 are threadedly connected, and the threaded tube 9 and the threaded rod 8 match each other. A bearing 11 is fixedly sleeved near the right end of the outer edge of the threaded tube 9. The right side of the bearing 11 and the left end of the threaded rod 8 are fixedly connected to a limiting plate 5. A fixed shaft 6 is fixedly connected to the inner side of the limiting plate 5. The fixed shaft 6 movably passes through the adjacent flange hole 4. The fixed shaft 6 and the flange hole 4 match each other. An anti-skid pad 7 is fixedly connected to the inner side of the limiting plate 5. The anti-skid pad 7 fits the side of the flange 3 close to the valve body 1. The cross-section of the limiting plate 5 is U-shaped, and the U-shaped opening faces the flange 3.

[0023] Working principle: During use, when it is necessary to connect the external pipe to the valve body 1, move the flange of the external pipe and place the flange of the external pipe on the inner side of the three limit plates 5. The three limit plates 5 limit the flange of the external pipe. At this time, the flange of the external pipe corresponds to the flange 2 of the valve body 1. Then, the fixing bolts are passed through the flange 2 of the valve body 1 and the flange hole 4 on the flange of the external pipe to complete the connection between the external pipe and the valve body 1. The device can be easily installed by one person, reducing the labor cost during installation;

[0024] Moreover, the limit plate 5 of the device can be disassembled. When disassembling, it is only necessary to drive the threaded tube 9 to rotate through the operating rod 10. The threaded tube 9 rotates in the inner cavity of the threaded rod 8 and the bearing 11. The threaded rod 8 moves toward the inner cavity of the threaded tube 9 under the action of the thread, thereby reducing the distance between the two limit plates 5, so that the limit plate 5 drives the anti-slip pad 7 away from the flange 3, so that the limit plate 5 is removed and installed on the valve body 1 to be installed with the external pipeline, which greatly improves the application range of the device;

[0025] 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", "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.

[0026] 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 at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pneumatic butterfly valve, comprising a valve body, a valve stem and a pneumatic device, characterized in that: The pneumatic device includes a cylinder and a transmission rod, and the transmission rod is connected to the valve stem. The outer edge of the valve body is fixedly sleeved with flanges near the left and right sides, and the flanges are provided with four flange holes. The outer edge of the valve body is provided with three threaded tubes, and a threaded rod is inserted into the left end of the threaded tube. A bearing is fixedly sleeved at the outer edge of the threaded tube near the right end. The right side of the bearing and the left end of the threaded rod are fixedly connected to a limit plate, and the inner side of the limit plate is fixedly connected to a fixed shaft.

2. A pneumatic butterfly valve according to claim 1, characterized in that: Two operating rods are fixedly connected to the outer edge of the threaded tube, and the two operating rods are symmetrically arranged up and down with the central axis of the threaded tube as the symmetry axis.

3. A pneumatic butterfly valve according to claim 1, characterized in that: The fixed shaft movably passes through the adjacent flange holes, and the fixed shaft and the flange holes match each other.

4. A pneumatic butterfly valve according to claim 1, characterized in that: The threaded tube and the threaded rod are threadedly connected, and the threaded tube and the threaded rod match each other.

5. A pneumatic butterfly valve according to claim 1, characterized in that: An anti-skid pad is fixedly connected to the inner side of the limit plate, and the anti-skid pad is in contact with a side of the flange close to the valve body.

6. A pneumatic butterfly valve according to claim 1, characterized in that: The cross section of the limiting plate is U-shaped, and the U-shaped opening faces the flange.

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