Pneumatic butterfly valve

Abstract

The utility model belongs to the technical field of butterfly valves, and particularly relates to a pneumatic butterfly valve which is characterized in that extrusion cavities on two sides of a driving piston are inflated, so that pressure difference is formed in the extrusion cavities on the two sides, the driving piston is controlled to move left and right, a valve rod is connected with the driving piston through a connecting piece, and the driving piston moves left and right to drive the valve rod to rotate. The valve plate can be driven only by inflating and exhausting the extrusion cavity, the opening and closing efficiency of the butterfly valve is improved, meanwhile, an electrical structure is avoided, and the fault rate of the butterfly valve is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and specifically relates to a butterfly valve, 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 on-off control of pipeline media. The valve body is opened and closed by rotating the valve disc around the valve stem.

[0003] The existing butterfly valve has a stem drive mechanism that includes manual and electric control. Manual adjustment has a low opening and closing efficiency, while electric adjustment usually requires connecting the rotating shaft of the drive motor to the valve stem. However, the drive motor includes a mechanical structure and an electrical structure. If one of the two structures fails, the valve will not be able to open and close normally.

[0004] Therefore, how to avoid the low opening and closing efficiency of the butterfly valve and the inability of the butterfly valve drive mechanism to open and close due to motor failure is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Utility Model Content

[0006] The embodiments of the present disclosure at least provide a pneumatic butterfly valve.

[0007] In a first aspect, an embodiment of the present disclosure provides a pneumatic butterfly valve, comprising: a valve body, in which a seal is provided; a valve stem, which is rotatably provided in the valve body, and the end of the valve stem extends out of the valve body; a valve plate, which is mounted on the side wall of the valve stem, and the valve plate can be rotated to fit the seal so that the valve body is closed; a driving mechanism, which comprises a driving shell, a through hole is provided in the driving shell, a driving piston is provided in the through hole, the length of the driving piston is smaller than the length of the through hole, so that an extrusion cavity is formed on both sides of the driving piston, wherein the driving piston is made to slide by changing the air pressure in the extrusion cavity, and; the protruding end of the valve stem is inserted into the driving shell, and the valve stem and the driving piston are connected by a connecting piece, so that the valve stem is driven to rotate by the driving piston.

[0008] In an optional embodiment, the driving piston includes a connecting column and piston rings arranged at both ends of the connecting column; the side wall of the piston ring fits the inner wall of the extrusion chamber, the side wall of the connecting column is integrally provided with a driving rack, and the valve stem is provided with a driving gear that meshes with the driving rack.

[0009] In an optional embodiment, a sealing ring groove is provided on the side wall of the piston ring to install a sealing ring.

[0010] In an optional embodiment, the extrusion cavity is cylindrical.

[0011] In an optional embodiment, end covers are provided at both ends of the drive housing, an adjusting bolt is inserted into the end cover, one end of the adjusting bolt extends into the extrusion chamber, a volume block is provided at the extending end of the adjusting bolt, and the adjusting bolt can extend into the drive piston to adjust the volume of the extrusion chamber.

[0012] In an optional embodiment, the adjusting bolt is threadedly connected to the end cover, the other end of the adjusting bolt always extends out of the end cover, and the extended end of the adjusting bolt is threadedly connected to a sealing nut.

[0013] In an optional embodiment, a vent hole is provided on the side wall of the extrusion chamber.

[0014] In the second aspect, the embodiment of the present disclosure also provides a pneumatic butterfly valve, including: a driving shell, which is provided with a through hole, and a driving piston is provided in the through hole, and the length of the driving piston is smaller than the length of the through hole, so that extrusion chambers are formed on both sides of the driving piston, and the extrusion chambers are respectively connected to an air source; a valve stem, the valve stem is inserted into the driving shell, and the valve stem is connected to the driving piston through a connecting piece, so that the driving piston can drive the valve stem to rotate.

[0015] On the third aspect, the embodiment of the present disclosure also provides a pneumatic butterfly valve, including: a drive shell, in which a drive piston is slidably arranged, and both ends of the drive piston can be subjected to force to drive the drive piston to reciprocate; a valve stem, which is connected to the drive piston through a connecting piece to enable the valve stem to rotate.

[0016] The beneficial effect of the present utility model is that the pneumatic butterfly valve inflates the extrusion chambers on both sides of the driving piston to form a pressure difference in the extrusion chambers on both sides, thereby controlling the left and right movement of the driving piston, and the valve stem is connected to the driving piston through a connecting piece. The left and right movement of the driving piston drives the valve stem to rotate, so that the valve plate connected to the valve stem rotates to fit the sealing member to open and close the butterfly valve, wherein only the extrusion chamber needs to be inflated and exhausted to complete the driving of the valve plate, thereby improving the opening and closing efficiency of the butterfly valve, while avoiding the use of electrical structure and reducing the failure rate of the butterfly valve.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A front view of a pneumatic butterfly valve provided in an embodiment of the present disclosure;

[0021] Figure 2 A cross-sectional view of a pneumatic butterfly valve provided in an embodiment of the present disclosure.

[0022] In the picture:

[0023] 1. Valve body; 11. Seal;

[0024] 2. Valve stem; 21. Drive gear;

[0025] 3. Valve plate;

[0026] 4. Driving mechanism; 41. Driving housing; 41a. Extrusion chamber; 41b. End cover; 41c. Adjusting bolt; 41d. Volume block; 41e. Sealing nut; 41f. Vent; 42. Driving piston; 42a. Connecting column; 42b. Piston ring; 42c. Driving rack; 42d. Sealing ring groove. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or that a third component may be interposed between the first component and the second component. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe technical content.

[0029] As used herein, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." when following a list of elements modify the entire list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0031] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include plural forms, unless otherwise clearly indicated herein. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0032] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0033] Based on the above research, the embodiments of the present disclosure provide a pneumatic butterfly valve, which reduces its failure rate while ensuring the opening and closing efficiency and improves the stability of the valve opening and closing.

[0034] The defects in the above solutions are the results obtained by the utility model inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article should be the contributions made by the utility model inventor to the present invention during the disclosure process.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0037] refer to Figure 1-2 , Figure 1-2 The invention discloses a pneumatic butterfly valve, comprising: a valve body 1, in which a sealing member 11 is provided; a valve stem 2, which is rotatably provided in the valve body 1, and the end of the valve stem 2 extends out of the valve body 1; a valve plate 3, which is mounted on the side wall of the valve stem 2, and the valve plate 3 can be rotated to fit the sealing member 11 so that the valve body 1 is closed; a driving mechanism 4, which comprises a driving housing 41, a through hole is provided in the driving housing 41, a driving piston 42 is provided in the through hole, the length of the driving piston 42 is smaller than the length of the through hole, so that an extrusion cavity 41a is formed on both sides of the driving piston 42, wherein the air pressure in the extrusion cavity 41a is changed to make the driving piston 42 slide, and the extension of the valve stem 2 The outlet end is plugged into the drive housing 41, and the valve stem 2 is connected to the drive piston 42 by a connecting piece, so that the valve stem 2 is driven to rotate by the drive piston 42; in short, the pneumatic butterfly valve controls the left and right movement of the drive piston 42 by inflating the extrusion chamber 41a on both sides of the drive piston 42 to form a pressure difference in the extrusion chamber 41a on both sides, and the valve stem 2 is connected to the drive piston 42 by a connecting piece. The left and right movement of the drive piston 42 drives the valve stem 2 to rotate, so that the valve plate 3 connected to the valve stem 2 rotates to fit the seal 11 to open and close the butterfly valve, wherein only the extrusion chamber 41a needs to be inflated and exhausted to complete the driving of the valve plate 3, thereby improving the opening and closing efficiency of the butterfly valve, while avoiding the use of electrical structure and reducing the failure rate of the butterfly valve.

[0038] refer to Figure 2In some embodiments, the driving piston 42 includes a connecting column 42a and piston rings 42b arranged at both ends of the connecting column 42a; the side wall of the piston ring 42b fits the inner wall of the extrusion chamber 41a, and the side wall of the connecting column 42a is integrally provided with a driving rack 42c, and the valve stem 2 is provided with a driving gear 21 engaged with the driving rack 42c; in short, the piston ring 42b is connected through the connecting column 42a, and the driving rack 42c is provided on the connecting column 42a, which cooperates with the driving gear 21 mounted on the valve stem 2 to convert the linear motion of the driving piston 42 into the rotational motion of the valve stem 2, thereby realizing the rotation of the valve plate 3.

[0039] refer to Figure 2 In some embodiments, a sealing ring groove 42d is provided on the side wall of the piston ring 42b to install a sealing ring; in short, by providing a sealing ring groove 42d on the side wall of the piston ring 42b, the sealing ring can be prevented so that the gap between the piston ring 42b and the extrusion chamber 41a is sealed, thereby ensuring the stable push of the piston ring 42b.

[0040] refer to Figure 2 In some embodiments, the extrusion chamber 41a is cylindrical; in short, the extrusion chamber 41a is cylindrical and the piston ring 42b is circular, which can reduce the difficulty of processing the piston ring 42b and the extrusion chamber 41a.

[0041] refer to Figure 2 In some embodiments, end covers 41b are provided at both ends of the drive housing 41, and an adjusting bolt 41c is inserted into the end cover 41b, one end of the adjusting bolt 41c extends into the extrusion chamber 41a, and a volume block 41d is provided at the extending end of the adjusting bolt 41c, and the adjusting bolt 41c can extend into the drive piston 42 to adjust the volume of the extrusion chamber 41a; in short, the adjusting bolt 41c is inserted into the end cover 41b, and a volume block 41d is provided at the extending end of the adjusting bolt 41c, and the volume of the volume block 41d is controlled by adjusting the extending amount of the adjusting bolt 41c. When using a gas source with a fixed air pressure, the pressure in the extrusion chamber 41a can be adjusted to control the formation of the drive piston 42, so as to adjust the angle of the valve plate 3 so that the butterfly valve can be well closed.

[0042] refer to Figure 2 In some embodiments, the adjusting bolt 41c is threadedly connected to the end cover 41b, the other end of the adjusting bolt 41c always extends out of the end cover 41b, and the extended end of the adjusting bolt 41c is threadedly connected with a sealing nut 41e; in short, the adjusting bolt 41c is threadedly connected to the end cover 41b, the structure is simple and reliable, and it is convenient to adjust the extension amount of the adjusting bolt 41c, and a sealing nut 41e is provided on the extended end of the adjusting bolt 41c, which can press the adjusting bolt 41c when the adjusting bolt 41c is in a suitable position.

[0043] refer to Figure 2 In some embodiments, a vent hole 41f is provided on the side wall of the extrusion cavity 41a; in short, air can be taken in and out of the extrusion cavity 41a through the vent hole 41f.

[0044] refer to Figure 1-2 , Figure 1-2 A pneumatic butterfly valve is shown, comprising: a drive housing 41, in which a through hole is provided, a drive piston 42 is provided in the through hole, the length of the drive piston 42 is smaller than the length of the through hole, so that extrusion chambers 41a are formed on both sides of the drive piston 42, and the extrusion chambers 41a are respectively connected to an air source; a valve stem 2, the valve stem 2 is inserted into the drive housing 41, and the valve stem 2 is connected to the drive piston 42 through a connecting piece, so that the drive piston 42 can drive the valve stem 2 to rotate.

[0045] refer to Figure 1-2 , Figure 1-2 A pneumatic butterfly valve is shown, comprising: a drive housing 41, in which a drive piston 42 is slidably arranged, and both ends of the drive piston 42 can be subjected to force to drive the drive piston 42 to reciprocate; a valve stem 2, which is connected to the drive piston 42 through a connecting piece to enable the valve stem 2 to rotate.

[0046] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein unless expressly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0048] Spatially relative terms, such as "inside," "outside," "below," "beneath," "down," "above," "on," etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "below" or "below" other elements or features will be oriented to be "above" the other elements or features. Thus, the example term "below" may encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0049] In the above discussion, unless otherwise indicated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0050] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A pneumatic butterfly valve, characterized in that: include: A valve body (1) having a sealing member (11) disposed therein; a valve stem (2) rotatably disposed within the valve body (1), with an end portion of the valve stem (2) extending out of the valve body (1); a valve plate (3) mounted on a side wall of the valve stem (2), wherein the valve plate (3) is capable of rotating to engage with the sealing member (11) so that the valve body (1) is closed; A drive mechanism (4), comprising a drive housing (41), wherein a through hole is provided in the drive housing (41), a drive piston (42) is provided in the through hole, and the length of the drive piston (42) is smaller than the length of the through hole, so that an extrusion cavity (41a) is formed on both sides of the drive piston (42), wherein the drive piston (42) is caused to slide by changing the air pressure in the extrusion cavity (41a); and The extended end of the valve stem (2) is inserted into the drive housing (41), and the valve stem (2) is connected to the drive piston (42) via a connecting piece, so that the valve stem (2) is driven to rotate by the drive piston (42).

2. The pneumatic butterfly valve according to claim 1, characterized in that: The driving piston (42) comprises a connecting column (42a) and piston rings (42b) arranged at both ends of the connecting column (42a); The side wall of the piston ring (42b) fits the inner wall of the extrusion chamber (41a), the side wall of the connecting column (42a) is integrally provided with a driving rack (42c), and the valve stem (2) is sleeved with a driving gear (21) meshing with the driving rack (42c).

3. The pneumatic butterfly valve according to claim 2, characterized in that: A sealing ring groove (42d) is provided on the side wall of the piston ring (42b) for installing a sealing ring.

4. The pneumatic butterfly valve according to claim 3, characterized in that: The extrusion cavity (41a) is cylindrical.

5. The pneumatic butterfly valve according to claim 4, characterized in that: End covers (41b) are provided at both ends of the drive housing (41), an adjusting bolt (41c) is plugged into the end cover (41b), one end of the adjusting bolt (41c) extends into the extrusion chamber (41a), a volume block (41d) is provided at the extending end of the adjusting bolt (41c), and the adjusting bolt (41c) can extend into the drive piston (42) to adjust the volume of the extrusion chamber (41a).

6. The pneumatic butterfly valve according to claim 5, characterized in that: The adjusting bolt (41c) is threadedly connected to the end cover (41b), the other end of the adjusting bolt (41c) always extends out of the end cover (41b), and the extended end of the adjusting bolt (41c) is threadedly connected to a sealing nut (41e).

7. The pneumatic butterfly valve according to claim 6, characterized in that: A vent hole (41f) is provided on the side wall of the extrusion cavity (41a).

8. A pneumatic butterfly valve, characterized in that: include: A drive housing (41) is provided with a through hole therein, a drive piston (42) is provided in the through hole, the length of the drive piston (42) is smaller than the length of the through hole, so that extrusion chambers (41a) are formed on both sides of the drive piston (42), and the extrusion chambers (41a) are respectively connected to a gas source; A valve stem (2) is inserted into the drive housing (41), and the valve stem (2) is connected to the drive piston (42) via a connecting piece, so that the drive piston (42) can drive the valve stem (2) to rotate.

9. A pneumatic butterfly valve, characterized in that: include: A driving housing (41) in which a driving piston (42) is slidably disposed, and both ends of the driving piston (42) can be subjected to force to drive the driving piston (42) to reciprocate; A valve stem (2) is connected to the driving piston (42) via a connecting piece so as to rotate the valve stem (2).

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