一种防渗漏的蝶阀

Abstract

本实用新型提供了一种防渗漏的蝶阀，属于阀门技术领域。它解决了如何提高蝶阀的密封性的问题。本防渗漏的蝶阀包括蝶板、呈筒状的阀座以及开设有安装口的阀体，阀座嵌设于安装口中，蝶板转动连接在阀座内，阀体内转动连接有穿过安装口的阀杆，蝶板套设在阀杆外并能够相对于阀杆周向保持定位，阀座的一端外侧壁上具有卡接凸部，安装口内壁上开设有定位槽，定位槽贯穿安装口的一端端口设置，卡接凸部嵌设于定位槽中使阀座沿周向定位于阀体内，阀杆穿过阀座使阀座沿所述安装口轴向定位于阀体内。本防渗漏的蝶阀能够有效提高自身的密封性。

Claims

1. A leak-proof butterfly valve, comprising a butterfly plate (1), a cylindrical valve seat (2), and a valve body (3) having an installation port (31), wherein the valve seat (2) is embedded in the installation port (31), the butterfly plate (1) is rotatably connected within the valve seat (2), and a valve stem (32) passing through the installation port (31) is rotatably connected within the valve body (3), wherein the butterfly plate (1) is sleeved over the valve stem (32) and can maintain a circumferential position relative to the valve stem (32), characterized in that, The valve seat (2) has a snap-fit ​​protrusion (21) on one side of its outer wall. The mounting port (31) has a positioning groove (311) on its inner wall. The positioning groove (311) passes through one end of the mounting port (31). The snap-fit ​​protrusion (21) is embedded in the positioning groove (311) so that the valve seat (2) is circumferentially positioned in the valve body (3). The valve stem (32) passes through the valve seat (2) so that the valve seat (2) is axially positioned in the valve body (3) along the mounting port (31).

2. The leak-proof butterfly valve of claim 1, wherein, The valve body (3) is disc-shaped, and the mounting port (31) is circular and extends through both sides of the valve body (3). There are two positioning grooves (311), and the two positioning grooves (311) are arranged circumferentially around the mounting port (31). There are two snap-fit ​​protrusions (21) on the outer side wall of one end of the valve seat (2). The two snap-fit ​​protrusions (21) are arranged circumferentially around the valve seat (2), and the two snap-fit ​​protrusions (21) are embedded in the two positioning grooves (311) one by one.

3. The leak-proof butterfly valve of claim 2, wherein, The inner wall of the mounting port (31) is also provided with two limiting grooves (312), each limiting groove (312) is provided through both ends of the mounting port (31), and the outer wall of the valve seat (2) has two limiting protrusions (22), the two limiting protrusions (22) are arranged at intervals along the circumference of the valve seat (2), and the two limiting protrusions (22) are embedded in the two limiting grooves (312) one to one.

4. The leak-proof butterfly valve of claim 3, wherein, The two limiting grooves (312) and the two positioning grooves (311) are alternately arranged along the circumferential direction of the inner wall of the mounting port (31), and the two snap-fit ​​protrusions (21) and the two limiting protrusions (22) are alternately arranged along the circumferential direction of the outer wall of the valve seat (2).

5. The leak-tight butterfly valve according to any one of claims 1-4, characterized in that The valve seat (2) has a plurality of reinforcing ribs (23) on its outer peripheral wall. The plurality of reinforcing ribs (23) are spaced apart along the height direction of the valve seat (2), and each reinforcing rib (23) is arranged circumferentially along the outer peripheral wall of the valve seat (2).

6. The leak-proof butterfly valve of claim 5, wherein, The height of the valve seat (2) is the same as the depth of the mounting port (31). Both ends of the valve seat (2) are provided with annular grooves (24) for assembling sealing rings, and the annular grooves (24) are arranged around the port of the valve seat (2).

7. The containment butterfly valve of claim 6, wherein, The butterfly plate (1) has a square perforation 1 (11) radially opened. The valve seat (2) has two perforations 2 (25) radially facing each other on its side wall. The valve body (3) has a main mounting seat (33) and a secondary mounting seat (34) facing each other on its side wall. A positioning sleeve (341) is rotatably connected in the secondary mounting seat (34). A handle (331) is rotatably connected in the main mounting seat (33). The valve stem (32) is a quadrangular prism and one end is inserted into the connecting end of the handle (331) and circumferentially positioned. The other end of the valve stem (32) passes through the main mounting seat (33), one of the perforations 2 (25), the perforation 1 (11), and the other perforation 2 (25) in sequence and extends into the secondary mounting seat (34) and the positioning sleeve (341) for connection and fixation.

8. The containment butterfly valve of claim 7, wherein, Two bushings (321) are fitted on the valve stem (32), and two stepped grooves (12) are correspondingly opened on the butterfly plate (1). The two stepped grooves (12) are opened around the two ends of the through hole (11) one by one. One end of the two bushings (321) is embedded and positioned in the corresponding stepped groove (12). The other end of one bushing (321) passes through one of the through holes (25) and extends into the connection end of the main mounting seat (33) and the handle (331) to abut against it. The other end of the other bushing (321) passes through the other through hole (25) and extends into the auxiliary mounting seat (34) and the positioning sleeve (341) to abut against it.

9. The containment butterfly valve of claim 8, wherein, The outer wall of each bushing (321) is in contact with the inner peripheral wall of the corresponding perforation (25).

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