Active adjusting gate valve

Abstract

The utility model discloses an initiative regulation gate valve, including: valve body, bonnet, valve plate and valve stem, the valve body is provided with inlet runner and outlet runner, the valve plate is provided in the valve body and is used for controlling the opening or closing between the inlet runner and outlet runner, bonnet is provided on the valve body through fastener, the bonnet is provided on the valve body through the fastener, the bonnet is provided on the valve body through the fastener. The inner end of the valve rod is in transmission connection with the valve rod, the outer end of the valve rod penetrates through the valve cover to be connected with a power device, two mounting holes are formed in the valve body and symmetrically formed in the two sides, with the valve plate as the center, of the valve body, and the two mounting holes are communicated with the valve cover. According to the arrangement, the active sealing device is arranged at the position, corresponding to the gate valve plate, of the valve body, so that under the condition that the medium pressure is small, the active sealing device can be actively adjusted, and the sealing effect on the gate valve plate is achieved. And the sealing effect between the valve plate and the valve seat is kept.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to an active regulating gate valve. Background Art

[0002] The gate valve is an opening and closing part, in which the movement direction of the gate is perpendicular to the direction of the fluid, and is used to fully open and fully close the pipeline, that is, to release and intercept the fluid in the pipeline. Unlike other valves, the gate valve cannot regulate and throttle the medium. Most gate valves use forced sealing, that is, when the valve is closed, it is necessary to rely on external force to force the valve plate to the valve seat to ensure the sealing of the matching surface.

[0003] In the prior art, the gate forms a seal with the valve seat through the action of the medium during its movement, and the overall sealing performance is relatively dependent on the pressure of the medium. When the medium pressure is low, the sealing performance will weaken. Therefore, there is room for improvement. Summary of the invention

[0004] In view of the above problems, the present application proposes an active regulating gate valve, by installing an active sealing device on the valve body corresponding to the position of the gate valve plate, so that when the medium pressure is relatively low, the active sealing device can be actively adjusted to maintain the sealing effect between the valve plate and the valve seat. The active regulating gate valve is specifically implemented by the following technical solutions:

[0005] An active regulating gate valve comprises: a valve body, a valve cover, a valve plate and a valve stem, the valve body is provided with an inlet flow channel and an outlet flow channel, the valve plate is arranged in the valve body and is used to control the conduction or closure between the inlet flow channel and the outlet flow channel, the valve cover is arranged on the valve body through a fastener, the inner end of the valve stem is transmission-connected to the valve stem and the outer end of the valve stem passes through the valve cover and is connected to a power device, a mounting hole is opened on the valve body, the mounting holes are provided with two, symmetrically arranged on both sides of the valve body with the valve plate as the center, and an active sealing device for loosening or tightening the valve plate is installed in the mounting hole.

[0006] It is further configured that the active sealing device includes a buffer head, a spring and a plug, and the buffer head, spring and plug are axially slidably arranged in the mounting hole from the inner end to the outer end in sequence. Through this configuration, the active sealing device is installed in the mounting hole to realize the basic function, and the overall structure is tight.

[0007] It is further arranged that a first limiting flange is provided at the inner end of the mounting hole, and the buffer head is limited in the mounting hole by the first limiting flange. Through this arrangement, the position of the buffer head is stabilized, so that the overall structure is tight and stable.

[0008] It is further configured that an outer wall of the buffer head in contact with the inner wall of the mounting hole is provided with a first sealing groove, and a first sealing ring is provided in the first sealing groove. Through this configuration, leakage between the mounting hole and the active sealing device is prevented, thereby further improving the sealing performance.

[0009] It is further configured that a buffer gasket is also provided at the inner end of the buffer head, the buffer gasket is connected to the buffer head by mortise and tenon, and the buffer gasket is not limited by the first limiting flange. Through this configuration, there is a certain buffer when the buffer head is pressed against the valve plate, thereby preventing wear and increasing the service life.

[0010] It is further configured that the outer periphery of the inner end of the plug is provided with a thread, and the outer end of the plug is provided with a second limiting flange. The plug is connected to the outer end of the mounting hole by a thread and is limited and fixed by the second limiting flange. Through this configuration, the plug applies force to tighten the spring to achieve basic functions, and the second limiting flange plays a certain limiting function to prevent damage caused by over-tightening.

[0011] It is further arranged that the plug is provided with a pressure-stabilizing hole along the axial direction for stabilizing the pressure balance between the inside of the mounting hole and the outside. Through this arrangement, the operation of the active sealing device during operation, which is caused by excessive pressure changes in the mounting hole and leads to operational difficulties, can be operated more smoothly.

[0012] It is further arranged that a second sealing groove is arranged on the outer periphery where the plug contacts the inner wall of the mounting hole, and a second sealing ring is arranged in the second sealing groove. Through this arrangement, further sealing is achieved to prevent leakage and improve the sealing performance of the valve.

[0013] It is further arranged that the outer end of the buffer head and the inner end of the plug are both provided with limiting protrusions, and the spring is limited in the mounting hole by the limiting protrusions. Through this arrangement, a limiting effect is exerted on the spring, and the overall structure is more stable.

[0014] The active regulating gate valve described above, when the gate valve is closed, can apply thrust to the inner end by rotating the plug in the mounting hole, act on the spring, and be transmitted to the buffer head by the spring, and finally act on the valve plate to achieve further sealing, which can supplement the small sealing force caused by the small medium pressure and improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A front cross-sectional view of an active regulating gate valve provided in an embodiment of the present application;

[0017] Figure 2 Active regulating gate valve provided in the embodiment of the present application Figure 1 Magnified view of part A.

[0018] Among them, the reference numerals in the figure are:

[0019] 1. Valve body; 2. Valve cover; 3. Valve plate; 4. Valve stem; 5. Inlet flow channel; 6. Outlet flow channel; 7. Power device; 8. Mounting hole; 9. Active sealing device; 10. Buffer head; 11. Spring; 12. Plug; 13. First limiting flange; 14. First sealing groove; 15. First sealing ring; 16. Buffer gasket; 17. Second limiting flange; 18. Thread; 19. Pressure stabilizing hole; 20. Second sealing groove; 21. Second sealing ring; 22. Limiting bump. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] The present application is further described with reference to the accompanying drawings and specific implementation methods:

[0023] Please also read Figure 1 to Figure 2 An active regulating gate valve comprises: a valve body 1, a valve cover 2, a valve plate 3 and a valve stem 4, wherein the valve body 1 is provided with an inlet flow channel 5 and an outlet flow channel 6, the valve plate 3 is arranged in the valve body 1 and is used to control the conduction or closure between the inlet flow channel 5 and the outlet flow channel 6, the valve cover 2 is arranged on the valve body 1 through a fastener, the inner end of the valve stem 4 is transmission-connected with the valve stem 4 and the outer end of the valve stem 4 passes through the valve cover 2 and is connected to a power device 7, a mounting hole 8 is opened on the valve body 1, and the mounting holes 8 are arranged in two, symmetrically arranged on both sides of the valve body 1 with the valve plate 3 as the center, and an active sealing device 9 for tightening and loosening the valve plate 3 is installed in the mounting hole 8.

[0024] See also Figure 1 and Figure 2In this embodiment, the active sealing device 9 includes a buffer head 10, a spring 11 and a plug 12. The buffer head 10, the spring 11 and the plug 12 are sequentially axially slidably arranged in the mounting hole 8 from the inner end to the outer end. In this way, the buffer head 10, the spring 11 and the plug 12 are all adapted to the inner diameter of the mounting hole 8, and can just slide along the extension direction of the mounting hole 8 without being too small to cause looseness; the inner end of the mounting hole 8 is provided with a first limiting flange 13, and the buffer head 10 is limited in the mounting hole 8 by the first limiting flange 13. In this way, the buffer head 10 is prevented from being squeezed by the spring 11. when it comes out of the mounting hole 8; the outer wall of the buffer head 10 that contacts the inner wall of the mounting hole 8 is provided with a first sealing groove 14, and a first sealing ring 15 is provided in the first sealing groove 14. The sealing ring is conventionally provided and can be provided on the buffer head 10 or on the inner wall of the mounting hole 8, mainly playing a sealing role between the mounting hole 8 and the buffer head 10; the inner end of the buffer head 10 is also provided with a buffer gasket 16, and the buffer gasket 16 is connected with the buffer head 10 by mortise and tenon joints, and the buffer gasket 16 is not limited by the first limiting flange 13, so that the buffer gasket 16 is made of rubber material, and the buffer gasket 1 6 is in direct contact with the valve plate 3, so the rubber buffer gasket 16 is helpful to protect the valve plate 3 from being impacted and worn, thereby avoiding the resulting reduction in sealing performance; the outer periphery of the inner end of the plug 12 is provided with a thread 18, and the outer end of the plug 12 is provided with a second limiting flange 17, and the plug 12 is connected to the outer end of the mounting hole 8 through the thread 18 and is fixed by the second limiting flange 17. The more precise the thread 18 is, the more precise the adjustment of the tightness of the valve plate 3 can be, so the strength and precision of the thread 18 are as high as possible; the plug 12 is axially penetrated with a thread for stabilizing the mounting hole 8 A pressure-stabilizing hole 19 that balances the internal and external pressures can ensure that the plug 12 can be operated smoothly during adjustment, because the pressure-stabilizing hole 19 connects the sealed space inside the mounting hole 8 with the atmospheric pressure, and no negative pressure or high pressure is generated to affect the sliding of the plug 12; a second sealing groove 20 is provided on the outer periphery of the plug 12 that contacts the inner wall of the mounting hole 8, and a second sealing ring 21 is provided in the second sealing groove 20; a limiting protrusion 22 is provided on the outer end of the buffer head 10 and the inner end of the plug 12, and the spring 11 is limited in the mounting hole 8 by the limiting protrusion 22, so that the spring 11 is positioned.

[0025] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An active regulating gate valve, include: A valve body (1), a valve cover (2), a valve plate (3) and a valve stem (4), wherein the valve body (1) is provided with an inlet flow channel (5) and an outlet flow channel (6), the valve plate (3) is arranged in the valve body (1) and is used to control the conduction or closure between the inlet flow channel (5) and the outlet flow channel (6), the valve cover (2) is arranged on the valve body (1) through a fastener, the inner end of the valve stem (4) is transmission-connected to the valve stem (4), and the outer end of the valve stem (4) passes through the valve cover (2) and is connected to a power device (7), characterized in that: a mounting hole (8) is opened on the valve body (1), and the mounting holes (8) are arranged in two, symmetrically arranged on both sides of the valve body (1) with the valve plate (3) as the center, and an active sealing device (9) for tightening and loosening the valve plate (3) is installed in the mounting hole (8).

2. An active regulating gate valve according to claim 1, Features The active sealing device (9) comprises a buffer head (10), a spring (11) and a plug (12), wherein the buffer head (10), the spring (11) and the plug (12) are sequentially arranged in the mounting hole (8) in an axially sliding manner along the mounting hole (8) from the inner end to the outer end.

3. An active regulating gate valve according to claim 2, Features: A first limiting flange (13) is provided at the inner end of the mounting hole (8), and the buffer head (10) is limited in the mounting hole (8) by the first limiting flange (13).

4. An active regulating gate valve according to claim 3, Features: The outer wall of the buffer head (10) in contact with the inner wall of the mounting hole (8) is provided with a first sealing groove (14), and a first sealing ring (15) is provided in the first sealing groove (14).

5. An active regulating gate valve according to claim 3, Features: A buffer gasket (16) is also provided at the inner end of the buffer head (10), the buffer gasket (16) being connected to the buffer head (10) by mortise and tenon joints, and the buffer gasket (16) is not limited by the first limiting flange (13).

6. An active regulating gate valve according to claim 2, Features The outer periphery of the inner end of the plug (12) is provided with a thread (18), and the outer end of the plug (12) is provided with a second limiting flange (17); the plug (12) is connected to the outer end of the mounting hole (8) via the thread (18) and is fixed in position via the second limiting flange (17).

7. An active regulating gate valve according to claim 6, Features The plug (12) is provided with a pressure-stabilizing hole (19) extending through the plug (12) in the axial direction and used for stabilizing the pressure balance between the inside of the mounting hole (8) and the outside.

8. An active regulating gate valve according to claim 7, Features A second sealing groove (20) is provided at the outer periphery of the plug (12) in contact with the inner wall of the mounting hole (8), and a second sealing ring (21) is provided in the second sealing groove (20).

9. An active regulating gate valve according to claim 2, Features The outer end of the buffer head (10) and the inner end of the plug (12) are both provided with a limiting protrusion (22), and the spring (11) is limitedly arranged in the mounting hole (8) by the limiting protrusion (22).

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