Check valve

Abstract

The check valve comprises a valve body, a shaft body is rotationally connected to the valve body, a rotating piece is fixedly connected to the outer wall of the shaft body in a penetrating and inserting mode, an overhaul groove is formed in the top of the valve body, and a sealing cover is installed at the top of the valve body. The side portion of the valve element is fixedly connected with a stud, and the outer wall of the stud is connected with a nut in a threaded penetrating mode. A positioning mechanism is arranged in the valve body and comprises a positioning frame, and a mounting column is slidably arranged at the top of the positioning frame; a supporting plate and a positioning plate. The positioning frame, the supporting plate, the positioning plate and the spring are matched with one another, the supporting plate and the positioning plate are driven to rotate at the same time, the positioning plate is connected with the interior of the positioning frame, the mounting column limits the relative position of the positioning plate and the positioning frame, and then the valve element can drive the nut to rotate to the maximum position; and the nut faces the inner cavity of the overhauling groove, so that the nut can be screwed conveniently, and the valve element can be taken down to be cleaned, maintained or replaced.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and in particular to a check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve core, and which relies on its own weight and the pressure of the medium to generate action in order to prevent the backflow of the medium. Check valves have a wide range of applications.

[0003] Existing check valves typically include a valve body, a valve core, a rotating component, and a shaft. The shaft is rotatably connected to the valve body, the rotating component is located on the shaft, and the valve core is mounted on the rotating component via studs and nuts. The valve core and the rotating component are located inside the valve body. When the flowing medium enters the interior of the valve body, it pushes the valve core to rotate, which in turn causes the rotating component to rotate in a circle around the shaft.

[0004] The valve body is usually equipped with a maintenance groove on the top. The maintenance groove is sealed with a sealing cover on the top of the valve body, so that the valve core can be removed for maintenance operations through the inside of the maintenance groove. However, when the valve core is disassembled, it is usually in a closed state. The disassembly depth of the valve core will affect the tightening of the nut. Therefore, it is not convenient to rotate and position the valve core to tighten the nut when the valve core is disassembled, which has certain limitations. Utility Model Content

[0005] The purpose of this invention is to provide a check valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a check valve, comprising:

[0007] A valve body, on which a shaft is rotatably connected, and a rotating component is fixedly inserted into the outer wall of the shaft. A maintenance groove is provided on the top of the valve body, and a sealing cover is installed on the top of the valve body.

[0008] A valve core is located inside the valve body. A stud is fixedly connected to the side of the valve core. The stud is located on a rotating part. A nut is threaded through the outer wall of the stud.

[0009] The valve body is internally provided with a positioning mechanism for locking the maximum rotation position of the rotating component. The positioning mechanism includes:

[0010] A positioning frame, wherein a mounting post is slidably provided on the top of the positioning frame;

[0011] The support plate and the positioning plate are fixedly connected to the support plate. The rotating component is connected to the positioning frame through the support plate and the positioning plate. The mounting column is used to lock the relative position of the positioning plate and the positioning frame.

[0012] Preferably, the end of the support plate is fixedly connected to the rotating component, the positioning plate is slidably inserted into the inner cavity of the positioning frame, and the side of the positioning plate is provided with a limiting groove that cooperates with the mounting column.

[0013] Preferably, the side of the positioning frame is fixedly connected to the inner wall of the valve body, the side of the positioning frame is provided with an installation groove, the inner cavity of the installation groove is provided with a connecting block, and the top of the positioning frame is threadedly connected with a positioning bolt, one end of the positioning bolt being threadedly connected to the connecting block.

[0014] Preferably, the top of the positioning frame is provided with a through groove, the mounting post is slidably inserted into the inner cavity of the through groove, a movable ring is sleeved on the outside of the mounting post, a locking bolt is threadedly inserted into the outside of the movable ring, and one end of the locking bolt is threadedly inserted into the mounting post.

[0015] Preferably, the top of the positioning frame is provided with an annular groove, and an installation cylinder is threadedly connected to the inner cavity of the annular groove. The outer wall of the installation column is slidably connected to the top of the installation cylinder.

[0016] Preferably, a spring is sleeved on the outside of the mounting column, one end of the spring is in contact with the inner wall of the mounting cylinder, and the other end of the spring is in contact with the moving ring.

[0017] The technical effects and advantages of this utility model are:

[0018] This invention utilizes the cooperation of a positioning frame, a support plate, a mounting cylinder, a mounting column, a moving ring, and a spring. The rotating component drives the valve core to rotate, simultaneously driving the support plate and the positioning plate to rotate. This connects the positioning plate to the interior of the positioning frame. The mounting column limits the relative position of the positioning plate and the positioning frame, thereby facilitating the valve core to rotate the nut to its maximum position, aligning the nut with the inner cavity of the inspection slot. This allows for the tightening of the nut, enabling the valve core to be removed for cleaning, maintenance, or replacement, thus improving the valve core's closing effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram showing the separation of the positioning frame and the positioning plate of this utility model.

[0021] Figure 3 This is a schematic diagram of the positioning frame and positioning plate of this utility model.

[0022] Figure 4 This is a front cross-sectional view of the positioning frame of this utility model.

[0023] In the diagram: 1. Valve body; 2. Sealing cover; 3. Rotating component; 4. Shaft; 5. Valve core; 6. Positioning mechanism; 61. Positioning frame; 62. Support plate; 63. Positioning plate; 64. Mounting cylinder; 65. Mounting column; 66. Moving ring; 67. Spring; 68. Connecting block; 69. Locking bolt. Detailed Implementation

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] This utility model provides, for example Figure 1-4 The check valve shown includes a valve body 1 and a valve core 5. A shaft 4 is rotatably connected to the valve body 1, and a rotating component 3 is fixedly inserted through the outer wall of the shaft 4. A maintenance groove is provided on the top of the valve body 1, and a sealing cover 2 is installed on the top of the valve body 1. The valve core 5 is located inside the valve body 1, and a stud is fixedly connected to the side of the valve core 5. The stud and nut facilitate the installation and disassembly of the valve core 5 for cleaning. The stud is located on the rotating component 3, and the nut is threaded through the outer wall of the stud.

[0026] Furthermore, the valve body 1 is internally provided with a positioning mechanism 6 for locking the rotating part 3 to its maximum rotation position. The positioning mechanism 6 includes a positioning frame 61, a support plate 62, and a positioning plate 63. The positioning frame 61 is convenient to connect with the positioning plate 63, so that after the rotating part 3 drives the valve core 5 to rotate to its maximum position, the valve core 5 can be connected and positioned so that the nut is close to the inside of the inspection groove, making it convenient to rotate the nut. The support plate 62 is convenient to support the positioning plate 63, and the positioning plate 63 is convenient to connect with the positioning frame 61. The top of the positioning frame 61 is slidably provided with a mounting post 65. The positioning plate 63 is fixedly connected to the support plate 62. The rotating part 3 is connected to the positioning frame 61 through the support plate 62 and the positioning plate 63. The mounting post 65 is used to lock the relative position of the positioning plate 63 and the positioning frame 61. The end of the support plate 62 is fixedly connected to the rotating part 3. The positioning plate 63 is slidably inserted into the inner cavity of the positioning frame 61. The side of the positioning plate 63 is provided with a limiting groove that cooperates with the mounting post 65.

[0027] Specifically, the side of the positioning frame 61 is fixedly connected to the inner wall of the valve body 1. A mounting groove is provided on the side of the positioning frame 61, and a connecting block 68 is provided in the inner cavity of the mounting groove, facilitating connection with the positioning frame 61 and thus facilitating positioning and installation of the positioning frame 61. A positioning bolt is threadedly connected to the top of the positioning frame 61, facilitating installation and disassembly of the positioning frame 61. One end of the positioning bolt is threadedly connected to the connecting block 68. A through groove is provided on the top of the positioning frame 61, and the mounting column 65 is slidably connected to the inner cavity of the through groove. A moving ring 66 is sleeved on the outside of the mounting column 65, facilitating movement of the mounting column 65 and enabling traction operation of the mounting column 65. A locking bolt 6 is threadedly connected to the outside of the moving ring 66. 9. Facilitates the installation and disassembly of the moving ring 66. One end of the locking bolt 69 is threadedly connected to the mounting post 65. The top of the positioning frame 61 has an annular groove, and the inner cavity of the annular groove is threadedly connected to the mounting cylinder 64, which facilitates the vertical guidance of the sliding of the mounting post 65 and also facilitates the compression of the spring 67. The outer wall of the mounting post 65 is slidably connected to the top of the mounting cylinder 64. The spring 67 is sleeved on the outside of the mounting post 65. The elasticity of the spring 67 facilitates the movement of the moving ring 66, making it easy for the mounting post 65 to return to its original position after movement, and facilitating repeated operation of the mounting post 65. One end of the spring 67 is in contact with the inner wall of the mounting cylinder 64, and the other end of the spring 67 is in contact with the moving ring 66.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A check valve, comprising: A valve body (1) is rotatably connected to a shaft (4), and a rotating part (3) is fixedly inserted into the outer wall of the shaft (4). A maintenance groove is provided on the top of the valve body (1), and a sealing cover (2) is installed on the top of the valve body (1). Valve core (5), the valve core (5) is located inside the valve body (1), the side of the valve core (5) is fixedly connected to a stud, the stud is located on the rotating part (3), and the outer wall of the stud is threaded to connect to a nut; The valve body (1) is characterized by having a positioning mechanism (6) inside for locking the maximum rotation position of the rotating member (3), the positioning mechanism (6) comprising: Positioning frame (61), the top of which is slidably provided with mounting post (65); The support plate (62) and the positioning plate (63) are fixedly connected to the support plate (62). The rotating part (3) is connected to the positioning frame (61) through the support plate (62) and the positioning plate (63). The mounting column (65) is used to lock the relative position of the positioning plate (63) and the positioning frame (61).

2. A check valve according to claim 1, characterized in that, The end of the support plate (62) is fixedly connected to the rotating part (3), the positioning plate (63) is slidably inserted into the inner cavity of the positioning frame (61), and the side of the positioning plate (63) is provided with a limiting groove that cooperates with the mounting column (65).

3. A check valve according to claim 1, characterized in that, The side of the positioning frame (61) is fixedly connected to the inner wall of the valve body (1). The side of the positioning frame (61) is provided with an installation groove. The inner cavity of the installation groove is provided with a connecting block (68). The top of the positioning frame (61) is threadedly connected with a positioning bolt. One end of the positioning bolt is threadedly connected to the connecting block (68).

4. A check valve according to claim 1, characterized in that, The top of the positioning frame (61) is provided with a through groove, and the mounting post (65) is slidably inserted into the inner cavity of the through groove. A movable ring (66) is sleeved on the outside of the mounting post (65), and a locking bolt (69) is threadedly inserted into the outside of the movable ring (66). One end of the locking bolt (69) is threadedly inserted into the mounting post (65).

5. A check valve according to claim 1, characterized in that, The top of the positioning frame (61) is provided with an annular groove, and the inner cavity of the annular groove is threadedly connected to the mounting cylinder (64). The outer wall of the mounting column (65) is slidably connected to the top of the mounting cylinder (64).

6. A check valve according to claim 1, characterized in that, A spring (67) is sleeved on the outside of the mounting post (65). One end of the spring (67) is in contact with the inner wall of the mounting cylinder (64), and the other end of the spring (67) is in contact with the moving ring (66).

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