Automatic locking butterfly valve

Abstract

The utility model discloses an automatic locking butterfly valve which comprises a valve seat, a shaft sleeve is fixedly installed on the top of the valve seat, a valve rod penetrates through the interior of the shaft sleeve and is rotationally connected with the shaft sleeve through a bearing, a valve plate is fixedly connected to the end, located in the valve seat, of the valve rod, and a top shell is fixedly installed on the top of the shaft sleeve. A driving assembly for driving the valve rod to rotate is arranged in the top shell, and a positioning assembly is fixed to the top end of the valve rod. The valve seat, the valve rod, the valve plate, the top shell, the driving assembly and the positioning assembly are arranged, the driving assembly comprises the worm gear, the transverse shaft and the worm, the worm drives the worm gear to rotate to drive the valve rod to rotate, finally rotation of the valve plate is achieved, first-step locking of the valve plate is achieved, and meanwhile the valve rod can be further fixed through the positioning assembly; and further locking of the valve plate in the opening or closing state is achieved, and the stability of the valve plate in the opening or closing state is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an automatic locking butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by its closing element (valve disc or butterfly plate) being a disk that rotates around a valve shaft to open and close. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body, thereby achieving opening, closing, or regulation.

[0003] A butterfly valve generally includes a valve seat, valve stem, valve plate, and drive mechanism. The valve stem and valve plate are rotated by operating the drive mechanism externally, thus opening and closing the butterfly valve. However, current butterfly valves lack a self-locking function in both open and closed states, resulting in poor stability of the valve plate. Therefore, to address these shortcomings, this invention proposes an automatically locking butterfly valve. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic locking butterfly valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic locking butterfly valve, including a valve seat, a bushing fixedly installed on the top of the valve seat, a valve stem rotatably connected through the bushing via a bearing, a valve plate fixedly connected to one end of the valve stem located inside the valve seat, a top shell fixedly installed on the top of the bushing, a drive assembly for driving the valve stem to rotate inside the top shell, a positioning assembly fixedly installed at the top of the valve stem, and two positioning holes for fixing the positioning assembly on the top wall of the top shell.

[0006] Furthermore, a sealing strip is fixed to the side of the valve plate.

[0007] Furthermore, flanges are fixed at both ends of the valve seat side, and a base is fixed at the bottom of the flange.

[0008] Furthermore, the drive assembly includes a worm gear fixed to the surface of the valve stem and a horizontal shaft penetrating the side wall of the top housing. The horizontal shaft is rotatably connected to the side wall of the top housing via a bearing. A worm is fixedly connected to one end of the horizontal shaft inside the top housing, and the worm meshes with the worm gear. A handle is fixedly connected to one end of the horizontal shaft outside the top housing.

[0009] Furthermore, a sealing ring is provided between the valve stem and the bushing.

[0010] Furthermore, two stops are fixed on both sides of the inner wall of the valve seat, and the two stops are respectively located on both sides of the valve plate.

[0011] Furthermore, the positioning component includes a turntable fixed to the top of the valve stem, a groove is provided on the top side of the turntable, a spring is fixed to the bottom wall of the groove, and a locking tooth is fixedly connected to the top of the spring, the top of the locking tooth can be engaged with any positioning hole.

[0012] The beneficial effects of this utility model are:

[0013] In use, this utility model is an automatically locking butterfly valve, which includes a valve seat, valve stem, valve plate, top shell, drive assembly, and positioning assembly. The drive assembly includes a worm gear, a horizontal shaft, and a worm. The worm gear drives the worm wheel to rotate, which in turn drives the valve stem to rotate, ultimately rotating the valve plate and thus achieving the first step of locking the valve plate. At the same time, the positioning assembly can further fix the valve stem, achieving further locking of the valve plate in the open or closed state and ensuring the stability of the valve plate in the open and closed states. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 : Overall perspective view of this utility model;

[0016] Figure 2 : Overall sectional view of this utility model;

[0017] Figure 3 The present utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 : A schematic diagram of the valve plate of this utility model after it is opened.

[0019] The attached figures are labeled as follows:

[0020] 1. Valve seat; 2. Bushing; 3. Valve stem; 31. Sealing ring; 4. Valve plate; 5. Top shell; 51. Positioning hole; 6. Drive assembly; 61. Worm gear; 62. Horizontal shaft; 63. Worm; 64. Handle; 7. Positioning assembly; 71. Turntable; 72. Groove; 73. Spring; 74. Clamping tooth; 8. Stop; 9. Flange; 10. Base. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-4 As shown, an automatic locking butterfly valve is disclosed, comprising a valve seat 1, a bushing 2 fixedly mounted on the top of the valve seat 1, a valve stem 3 rotatably connected through the bushing 2 via a bearing, a valve plate 4 fixedly connected to one end of the valve stem 3 located inside the valve seat 1, a top shell 5 fixedly mounted on the top of the bushing 2, a drive assembly 6 for driving the valve stem 3 to rotate inside the top shell 5, a positioning assembly 7 fixedly mounted on the top of the valve stem 3, and two positioning holes 51 for fixing the positioning assembly 7 on the top wall of the top shell 5.

[0023] Sealing strips are fixed on the four sides of the valve plate.

[0024] In this embodiment, the valve plate 4 is provided with a groove on its side, and the sealing strip is snapped into the groove. The sealing strip can increase the sealing between the valve plate 4 and the inner wall of the valve seat 1, thereby ensuring the sealing when the valve plate 4 is closed.

[0025] Flanges 9 are fixed at both ends of the side of valve seat 1, and base 10 is fixed at the bottom of flange 9.

[0026] In this embodiment, the base 10 is also provided with a connection hole. The butterfly valve can be fixedly connected to the pipeline through the flange 9, and the butterfly valve can be fixedly installed through the base 10.

[0027] The drive assembly 6 includes a worm gear 61 fixed to the surface of the valve stem 3 and a horizontal shaft 62 penetrating the side wall of the top shell 5. The horizontal shaft 62 is rotatably connected to the side wall of the top shell 5 via bearings. A worm 63 is fixedly connected to one end of the horizontal shaft 62 inside the top shell 5. The worm 63 meshes with the worm gear 61. A handle 64 is fixedly connected to one end of the horizontal shaft 62 outside the top shell 5.

[0028] Since the worm 63 and the worm wheel 61 can transmit power, and the worm 63 and the worm wheel 61 have self-locking properties, when the horizontal shaft 62 is rotated by the handle 64 outside the top shell 5, the horizontal shaft 62 can drive the valve stem 3 to rotate, and the valve stem 3 can only be driven to rotate by the horizontal shaft 62, while the valve stem 3 cannot drive the horizontal shaft 62 to rotate.

[0029] A sealing ring 31 is provided between the valve stem 3 and the bushing 2.

[0030] In this embodiment, the sealing ring 31 can improve the sealing performance between the valve stem 3 and the bushing 2.

[0031] Two blocks 8 are fixed on both sides of the inner wall of the valve seat 1, and the two blocks 8 are located on both sides of the valve plate 4 respectively.

[0032] By setting the stop 8, the valve plate 4 can only rotate in one direction and cannot be opened in the opposite direction. This is mainly used for the locking and positioning of the matching positioning component 7 and the positioning hole 51.

[0033] The positioning component 7 includes a turntable 71 fixed to the top of the valve stem 3. A groove 72 is provided on the top side of the turntable 71. A spring 73 is fixed to the bottom wall of the groove 72. A locking tooth 74 is fixedly connected to the top of the spring 73. The top of the locking tooth 74 can be engaged with the inside of any positioning hole 51.

[0034] In this embodiment, the valve stem 3 rotates, causing the turntable 71 to rotate. When the groove 72 on the turntable 71 aligns with any of the positioning holes 51, the spring 73 presses the retaining tooth 74 upward and engages with the currently aligned positioning hole 51, thus fixing the turntable 71 and further fixing the valve stem 3. When the valve stem 3 needs to be rotated again by the drive assembly 6, the retaining tooth 74 can be pressed downward to disengage it from the currently engaged positioning hole 51. Then, the handle 64 can be rotated in the opposite direction to rotate the valve stem 3 and the valve plate 4 in the opposite direction, causing the retaining tooth 74 to engage with the other positioning hole 51. The angle between the lines connecting the two positioning holes 51 to the center of the top shell 5 is a right angle, and the positions of the two positioning holes 51 correspond exactly to the open and closed positions of the valve plate 4, thereby further locking the valve plate 4 in the open and closed states.

[0035] Working principle: When the valve needs to be opened or closed, first, the retaining tooth 74 is disengaged from the current positioning hole 51. Then, the horizontal shaft 62 is rotated by the handle 64, which drives the valve stem 3 to rotate. The valve stem 3 then drives the valve plate 4 to rotate, thus opening or closing the valve plate 4. When the valve plate 4 is rotated to the open or closed state, the retaining tooth 74 is engaged with the other positioning hole 51. Furthermore, the valve plate 4 is in contact with the stop block 8 when closed.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An automatically locking butterfly valve, comprising a valve seat (1), characterized in that: A bushing (2) is fixedly installed on the top of the valve seat (1). A valve stem (3) is rotatably connected through the bushing (2) via a bearing. A valve plate (4) is fixedly connected to one end of the valve stem (3) inside the valve seat (1). A top shell (5) is fixedly installed on the top of the bushing (2). A drive assembly (6) for driving the valve stem (3) to rotate is provided inside the top shell (5). A positioning assembly (7) is fixed on the top of the valve stem (3). Two positioning holes (51) for fixing the positioning assembly (7) are opened on the top wall of the top shell (5).

2. The automatically locking butterfly valve according to claim 1, characterized in that: A sealing strip is fixed to the side of the valve plate (4).

3. The automatically locking butterfly valve according to claim 1, characterized in that: The valve seat (1) has flanges (9) fixed at both ends of its side, and a base (10) is fixed at the bottom of the flanges (9).

4. The automatically locking butterfly valve according to claim 1, characterized in that: The drive assembly (6) includes a worm gear (61) fixed to the surface of the valve stem (3) and a horizontal shaft (62) penetrating the side wall of the top shell (5). The horizontal shaft (62) is rotatably connected to the side wall of the top shell (5) through a bearing. A worm (63) is fixedly connected to one end of the horizontal shaft (62) inside the top shell (5). The worm (63) meshes with the worm gear (61). A handle (64) is fixedly connected to one end of the horizontal shaft (62) outside the top shell (5).

5. The automatically locking butterfly valve according to claim 1, characterized in that: A sealing ring (31) is provided between the valve stem (3) and the bushing (2).

6. The automatically locking butterfly valve according to claim 1, characterized in that: Two blocks (8) are fixed on both sides of the inner wall of the valve seat (1), and the two blocks (8) are located on both sides of the valve plate (4).

7. The automatically locking butterfly valve according to claim 1, characterized in that: The positioning component (7) includes a turntable (71) fixed to the top of the valve stem (3). The turntable (71) has a groove (72) on its top side. A spring (73) is fixed to the bottom wall of the groove (72). A locking tooth (74) is fixedly connected to the top of the spring (73). The top of the locking tooth (74) can be engaged with any positioning hole (51).

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