Flange butterfly valve with butterfly plate position locking structure

Abstract

The flange butterfly valve with the butterfly plate position locking structure comprises a valve body and a butterfly plate, the valve body is provided with a valve cavity, the butterfly plate is rotatably arranged in the valve cavity through tail shafts symmetrically distributed on the two sides, and the tail shafts comprise the first tail shaft close to a turbine box and the second tail shaft away from the turbine box; a tail cover is arranged at the position, right opposite to the second tail shaft, of the outer side of the valve body, the tail cover can be relatively close to or away from the valve body, a limiting groove is formed in the central axis of the tail cover, and the second tail shaft is provided with a boss matched with the limiting groove. According to the flange butterfly valve with the butterfly plate position locking structure, the position of the butterfly plate can be effectively locked, a turbine box and the like of the butterfly valve can be conveniently disassembled and maintained, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve equipment technology, and in particular to a flange butterfly valve with a butterfly plate position locking structure. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve. A flanged butterfly valve is a butterfly valve with an added flange structure. It controls the flow rate of the medium in the pipeline by rotating an internal butterfly plate. It is mainly used in water supply and drainage, metallurgy, energy systems, and light textile industries.

[0003] If a flanged butterfly valve installed horizontally on a pipeline and in normal use encounters a damaged turbine box, the turbine box needs to be replaced on-site. During the replacement process, the position of the butterfly plate may change due to water flow impact, such as changing from the original fully open position to the half-open position, or from the original fully closed position to the open position. This can pose risks to pipeline water supply or process control. Utility Model Content

[0004] This application provides a flanged butterfly valve with a butterfly plate position locking structure, which can effectively lock the position of the butterfly plate, making it convenient to disassemble, maintain and repair the turbine box of the butterfly valve, etc., and is easy to use.

[0005] This application provides a flanged butterfly valve with a butterfly plate position locking structure, including a valve body and a butterfly plate. The valve body has a valve cavity, and the butterfly plate is rotatably disposed in the valve cavity by tail shafts symmetrically distributed on both sides. The tail shafts include a first tail shaft near the turbine housing and a second tail shaft away from the turbine housing. The valve body has a tail cover on the outer side directly opposite the second tail shaft. The tail cover can be relatively close to or away from the valve body. The tail cover has a limiting groove at the central axis, and the second tail shaft has a boss that cooperates with the limiting groove.

[0006] In one possible implementation, the limiting groove is a through hole.

[0007] In one possible implementation, the limiting groove is a cross groove, and the boss is a straight boss.

[0008] In one possible implementation, the tail cap is connected to the valve body by a plurality of fastening screws evenly distributed in the circumferential direction.

[0009] In one possible implementation, the second tail shaft and the butterfly plate are connected by a pin.

[0010] Beneficial effects: Compared with the prior art, the flange butterfly valve with butterfly plate position locking structure provided in this application has a tail cover with a limiting groove on the surface of the valve body. At the same time, the second tail shaft has a boss that cooperates with the limiting groove. When the tail cover moves away from the valve body and the boss disengages from the limiting groove, the butterfly plate can rotate arbitrarily under the drive of the actuator. When the tail cover moves close to the valve body and the boss and the limiting groove are combined, the butterfly plate can be firmly locked by the tail cover through the second tail shaft. At this time, the turbine box of the butterfly valve can be disassembled, maintained and repaired, thereby ensuring that the position of the butterfly plate will not change due to water flow impact, etc.

[0011] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0012] Figure 1 A three-dimensional structural schematic diagram of the flange butterfly valve with butterfly plate position locking structure of this application is shown.

[0013] Figure 2 A side view of the flanged butterfly valve with a butterfly plate position locking structure according to this application is shown.

[0014] Figure 3 A cross-sectional view of the flange butterfly valve with a butterfly plate position locking structure according to this application is shown. Detailed Implementation

[0015] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0016] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0017] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0018] refer to Figures 1 to 3 This application provides a flanged butterfly valve with a butterfly plate position locking structure, including a valve body 10 and a butterfly plate 20. The valve body 10 has a valve cavity 101, and the butterfly plate 20 is rotatably disposed within the valve cavity 101 via tail shafts symmetrically distributed on both sides. The tail shafts include a first tail shaft 31 near the turbine housing and a second tail shaft 32 away from the turbine housing. Furthermore, the valve body 10 has a tail cover 40 on its outer side directly opposite the second tail shaft 32. The tail cover 40 can be relatively close to or away from the valve body 10, and the tail cover 40 has a limiting groove 401 at its central axis. Correspondingly, the second tail shaft 32 is provided with a boss 321 that cooperates with the limiting groove 401. In this way, when the tail cover 32 moves away from the valve body 10 and the boss 321 disengages from the limiting groove 401, the butterfly plate 20 can rotate freely under the drive of the actuator. When the tail cover 32 approaches the valve body 10 and the boss 321 and the limiting groove 401 are combined, the second tail shaft 32 is locked by the tail cover 40. Thus, the butterfly plate 20 can be firmly locked by the tail cover 40 through the second tail shaft 32. At this time, the turbine box of the butterfly valve can be disassembled, maintained and repaired. This ensures that the position of the butterfly plate 20 will not change due to water flow impact or other factors.

[0019] In one embodiment, the limiting groove 401 is a through hole.

[0020] In one embodiment, the limiting groove 401 is a cross groove, and correspondingly, the boss 321 is a straight boss, which is convenient to fit together.

[0021] Those skilled in the art will know that the limiting groove 401 can also be set to other shapes, as long as it can be combined with the boss 321 to limit the second tail shaft 32 in the rotation direction.

[0022] In one embodiment, the tail cap 40 is connected to the valve body 10 by a plurality of circumferentially evenly distributed fastening screws 41. The distance between the tail cap 40 and the valve body 10 can be changed by turning the fastening screws 41, so that the boss 321 can disengage from the limiting groove 401 or engage with the limiting groove 401.

[0023] In one embodiment, the second tail shaft 32 and the butterfly plate 20 are connected by a pin 322.

[0024] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0025] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A flanged butterfly valve with a butterfly plate position locking structure, comprising a valve body and a butterfly plate, wherein the valve body has a valve cavity, and the butterfly plate is rotatably disposed within the valve cavity via tail shafts symmetrically distributed on both sides, characterized in that, The tail shaft includes a first tail shaft near the turbine housing and a second tail shaft away from the turbine housing. The valve body has a tail cover on its outer side directly opposite the second tail shaft. The tail cover can be relatively close to or away from the valve body. The tail cover has a limiting groove at the central axis. The second tail shaft has a boss that cooperates with the limiting groove.

2. The flange butterfly valve with a butterfly plate position locking structure as described in claim 1, characterized in that, The limiting groove is a through hole.

3. The flange butterfly valve with a butterfly plate position locking structure as described in claim 2, characterized in that, The limiting groove is a cross groove, and the boss is a straight boss.

4. The flange butterfly valve with a butterfly plate position locking structure as described in claim 1, characterized in that, The tail cap is connected to the valve body by a plurality of fastening screws evenly distributed in the circumferential direction.

5. The flange butterfly valve with a butterfly plate position locking structure as described in claim 1, characterized in that, The second tail shaft and the butterfly plate are connected by a pin.

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