Leak-proof structure of valve rod of valve

Abstract

The utility model discloses a valve rod leakproof structure, which comprises a valve body, two sides of the valve body are provided with connecting assemblies, each connecting assembly comprises a connecting pipe communicated with two sides of the valve body, the exteriors of the two connecting pipes are fixedly connected with flanges, and the valve body can be connected with a pipeline through the connecting pipes and the flanges. A shell is fixedly connected to the top of the valve body, the shell is round, a valve assembly is arranged in the valve body and comprises a valve rod body rotationally connected to the top of the shell, the valve rod body extends into the valve body, and a sealing assembly is arranged in the shell. Therefore, the valve rod body and the shell can be sealed, the defect that liquid in a pipeline leaks through the connecting position between the valve rod body and the valve body when the valve rod body is rotated traditionally is overcome, the sealing effect is good, and use by workers is greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stems, in particular to a valve stem anti-leakage structure. Background Art

[0002] Valves include gate valves, globe valves, butterfly valves, ball valves, plug valves, check valves, pressure reducing valves, and steam traps. A butterfly valve, also known as a flap valve or flap valve, is a relatively simple regulating valve. Its key component resembles a butterfly facing the wind, allowing it to rotate freely. It is used for on / off control of low-pressure pipeline media, opening and closing via the rotation of the valve disc around the valve shaft.

[0003] The valve stem is a key component in the valve. The main function of the valve stem is to transmit the force and torque from the actuator (such as handwheel, electric device, etc.) to move the valve core in the valve body, thereby realizing the function of opening, closing or regulating the flow of the valve.

[0004] Most of the existing valve stems do not have the function of preventing leakage when in use. After long-term use, the valve stem will suffer severe wear due to the rigid contact between the contact surface of the valve stem and the valve, and the sealing performance will begin to decline. The fluid is prone to leakage, which affects the use effect and safety of the valve and is not conducive to the use of staff. For this reason, we propose a valve stem anti-leakage structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a valve stem anti-leakage structure for solving the above problems.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A valve stem leakage prevention structure includes a valve body, connecting components are provided on both sides of the valve body, the top of the valve body is fixedly connected to a shell, the shell is circular in shape, a valve component is provided inside the valve body, a sealing component is provided inside the shell, and a lifting component is provided inside the shell.

[0008] Preferably, the connecting assembly includes connecting pipes connected to both sides of the valve body, and flanges are fixedly connected to the outside of the two connecting pipes. The valve body and the pipeline can be connected through the provided connecting pipes and flanges.

[0009] Preferably, the valve assembly includes a valve stem body rotatably connected to the top of the shell, the valve stem body extends to the interior of the valve body, and the outside of the valve stem body is fixedly connected to a valve plate. By setting the valve assembly, the valve body can be opened to allow the liquid inside the pipeline to flow.

[0010] Preferably, a handle is fixedly connected to the top of the valve stem body, and the handle is made of rubber material, thereby improving the comfort of the staff when holding the handle.

[0011] Preferably, the sealing assembly includes a first fixing plate fixedly connected to the interior of the shell, and a second fixing plate is fixedly connected to the interior of the shell, and the second fixing plate is located below the first fixing plate.

[0012] Preferably, a first sealing gasket is fixedly connected to the bottom of the first fixing plate, and a second sealing gasket is fixedly connected to the top of the second fixing plate. The valve stem body and the housing can be sealed by the provided sealing assembly.

[0013] Preferably, the lifting assembly includes a threaded groove opened on the outside of the valve stem body, the external thread of the threaded groove is connected to a threaded sleeve, and the outside of the threaded sleeve is fixedly connected to a pressure plate. Through the setting of the lifting assembly, the pressure plate can be moved up and down to contact the first sealing gasket and the second sealing gasket.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the valve body and the pipeline can be connected by the provided connecting pipe and flange, and the valve stem body can be driven to rotate by holding the handle and rotating it. At this time, the valve stem body drives the valve plate to rotate when rotating, and the interior of the valve body can be opened. The threaded groove can be rotated by rotating the valve stem body, and the threaded sleeve starts to move. The threaded sleeve drives the pressure plate to move when moving, and the pressure plate moves to the connection with the first sealing gasket. At this time, the first sealing gasket and the pressure plate can form a seal, and the reversal of the handle can make the pressure plate contact with the second sealing gasket. At this time, the pressure plate and the second sealing gasket form a seal. Through the above structure, the valve stem body and the shell can be sealed, which avoids the traditional problem that the liquid inside the pipeline leaks through the connection between the valve stem body and the valve body when the valve stem body is rotated. The sealing effect is better, which greatly facilitates the use of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-section structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of part A.

[0018] In the figure: 1. valve body; 2. connecting pipe; 3. flange; 4. housing; 5. valve stem body; 6. handle; 7. valve plate; 8. thread groove; 9. threaded sleeve; 10. pressure plate; 11. first fixing plate; 12. first sealing gasket; 13. second fixing plate; 14. second sealing gasket. DETAILED DESCRIPTION

[0019] 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.

[0020] Example: Refer to Figure 1-3 , a valve stem leakage prevention structure includes a valve body 1, and connecting components are provided on both sides of the valve body 1. The connecting component includes connecting pipes 2 connected on both sides of the valve body 1, and the outsides of the two connecting pipes 2 are fixedly connected to flanges 3. The valve body 1 can be connected to the pipeline through the provided connecting pipes 2 and flanges 3. The top of the valve body 1 is fixedly connected to a shell 4, and the shell 4 is circular in shape. A valve assembly is provided inside the valve body 1, and the valve assembly includes a valve stem body 5 rotatably connected to the top of the shell 4. The valve stem body 5 extends to the interior of the valve body 1, and the outside of the valve stem body 5 is fixedly connected to a valve plate 7. The valve body 1 can be opened by the provided valve assembly to allow the liquid inside the pipeline to circulate. The top of the valve stem body 5 is fixedly connected to a handle 6. The provided rubber handle 6 improves the comfort of the staff when holding the handle 6.

[0021] Specifically, a sealing assembly is provided inside the shell 4, and the sealing assembly includes a first fixing plate 11 fixedly connected to the inside of the shell 4, a second fixing plate 13 fixedly connected to the inside of the shell 4, the second fixing plate 13 is located below the first fixing plate 11, and a first sealing gasket 12 is fixedly connected to the bottom of the first fixing plate 11, and a second sealing gasket 14 is fixedly connected to the top of the second fixing plate 13. Through the provided sealing assembly, the valve stem body 5 and the shell 4 can be sealed.

[0022] Specifically, a lifting assembly is provided inside the shell 4, and the lifting assembly includes a threaded groove 8 opened on the outside of the valve stem body 5, the external thread of the threaded groove 8 is connected to a threaded sleeve 9, and the outside of the threaded sleeve 9 is fixedly connected to a pressure plate 10. Through the setting of the lifting assembly, the pressure plate 10 can be moved up and down to contact the first sealing gasket 12 and the second sealing gasket 14.

[0023] When in use: the valve body 1 can be connected to the pipeline through the provided connecting pipe 2 and flange 3, and the valve stem body 5 can be rotated by holding the handle 6, and then the valve stem body 5 is driven to rotate. At this time, the valve stem body 5 drives the valve plate 7 to rotate when rotating, and the interior of the valve body 1 can be opened. By rotating the valve stem body 5, the threaded groove 8 can be rotated, and the threaded sleeve 9 starts to move. The threaded sleeve 9 drives the pressure plate 10 to move when moving, and the pressure plate 10 moves to the connection with the first sealing gasket 12. At this time, the first sealing gasket 12 and the pressure plate 10 can form a seal, and the handle 6 is reversed to make the pressure plate 10 contact with the second sealing gasket 14. At this time, the pressure plate 10 and the second sealing gasket 14 form a seal. Through the above structure, the valve stem body 5 and the housing 4 can be sealed, avoiding the traditional problem that when the valve stem body 5 is rotated, the liquid inside the pipeline will leak through the connection between the valve stem body 5 and the valve body 1. The sealing effect is better, which greatly facilitates the use of the staff.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve stem anti-leakage structure, comprising a valve body (1), characterized in that: Connecting assemblies are provided on both sides of the valve body (1), a shell (4) is fixedly connected to the top of the valve body (1), the shell (4) is circular in shape, a valve assembly is provided inside the valve body (1), a sealing assembly is provided inside the shell (4), and a lifting assembly is provided inside the shell (4).

2. A valve stem anti-leakage structure according to claim 1, characterized in that: The connection assembly comprises connection pipes (2) communicating with both sides of the valve body (1), and flanges (3) are fixedly connected to the outsides of the two connection pipes (2).

3. The valve stem anti-leakage structure according to claim 1, characterized in that: The valve assembly comprises a valve stem body (5) rotatably connected to the top of the housing (4), the valve stem body (5) extending into the interior of the valve body (1), and a valve plate (7) fixedly connected to the exterior of the valve stem body (5).

4. A valve stem anti-leakage structure according to claim 3, characterized in that: The top of the valve stem body (5) is fixedly connected with a handle (6).

5. The valve stem anti-leakage structure according to claim 1, characterized in that: The sealing assembly comprises a first fixing plate (11) fixedly connected to the interior of a housing (4); a second fixing plate (13) is fixedly connected to the interior of the housing (4); and the second fixing plate (13) is located below the first fixing plate (11).

6. A valve stem anti-leakage structure according to claim 5, characterized in that: The bottom of the first fixing plate (11) is fixedly connected to a first sealing gasket (12), and the top of the second fixing plate (13) is fixedly connected to a second sealing gasket (14).

7. The valve stem anti-leakage structure according to claim 1, characterized in that: The lifting assembly comprises a threaded groove (8) provided on the outside of the valve stem body (5); the external thread of the threaded groove (8) is connected to a threaded sleeve (9); and the external of the threaded sleeve (9) is fixedly connected to a pressure plate (10).

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