CN219755355U - Pneumatic stop valve - Google Patents
Pneumatic stop valve Download PDFInfo
- Publication number
- CN219755355U CN219755355U CN202321160198.0U CN202321160198U CN219755355U CN 219755355 U CN219755355 U CN 219755355U CN 202321160198 U CN202321160198 U CN 202321160198U CN 219755355 U CN219755355 U CN 219755355U
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- China
- Prior art keywords
- valve
- valve rod
- limiting
- rod
- hoop
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- 230000000670 limiting effect Effects 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 9
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model discloses a pneumatic stop valve, which belongs to the technical field of valves and comprises: a valve body; the valve seat, the valve cover, the valve rod and the valve rod are connected with the cylinder, and the valve rod is suitable for moving under the drive of the cylinder; the valve clack is used for being connected with the valve seat to realize the sealing of the valve body; the stop valve further includes: the limiting part is arranged on the valve rod; the limiting component is used for being matched with the limiting part to limit the valve rod; the limit part includes: the diameter of the boss is larger than that of the valve rod; and the protrusion, wherein, when the limiting component is arranged between the boss and the protrusion, the valve rod can be limited and can not move up and down. When the technical scheme of the utility model is implemented, the limiting part is matched with the limiting component to limit the valve rod, and when the cylinder is in a pressure maintaining state, the limiting component is arranged between the boss and the bulge, so that the valve rod is limited and cannot be moved due to the pressure action in the valve body, and the stability of the stop valve is improved.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a pneumatic stop valve.
Background
The stop valve is a closed valve for controlling the flow of fluid in a pipeline, and generally comprises a straight-through type, a right-angle type and a straight-flow type inclined stop valve, and is widely applied to the industries of chemical industry, pharmacy, petroleum, ships and the like.
For example, chinese patent publication No. CN214404710U discloses a pneumatic stop valve, in the technical scheme of this patent, a form of providing a sealing disc and a first sealing ring between the sealing disc and a valve rod replaces the conventional packing and packing gland, and the open end of a cylinder housing is directly connected with a valve body, so that the dimension in the height direction of the pneumatic value method is reduced, and the installation space is saved.
However, in this technical scheme, the driving piece of valve rod is the cylinder, when the cylinder drive valve rod moves down, drives the valve clack and moves down, makes valve clack and sealed face closely laminate, prevents the fluid circulation in the pipeline, and in actual use, the fluid that is prevented to circulate in the pipeline can produce pressure to on acting on the valve clack, because the cylinder is in the pressurize state this moment, when the pressure that is prevented to circulate in the pipeline produced is greater than the thrust of cylinder, can lead to the cylinder to retract, and then make the valve clack and sealed face between produce the gap, can't realize sealed effect, lead to the fluid leakage in the pipeline.
It is necessary to provide a pneumatic shut-off valve to solve the above problems.
It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and, therefore, it may contain information that does not constitute prior art.
Disclosure of Invention
Based on the above problems existing in the prior art, the present utility model aims to solve the problems: the pneumatic stop valve achieves the effect of improving the stability of the stop valve.
The technical scheme adopted for solving the technical problems is as follows: a pneumatic shut-off valve comprising:
a valve body;
the valve seat is arranged in the valve body;
the valve cover is fixedly connected with the valve body;
the valve rod penetrates through the valve cover, the valve rod is connected with a cylinder, and the valve rod is suitable for moving in the valve cover under the driving of the cylinder;
the valve clack is connected with the valve rod and is used for being connected with the valve seat to realize the sealing of the valve body;
the shut-off valve further comprises:
the limiting part is arranged on the valve rod;
the limiting component is used for being matched with the limiting part to limit the valve rod;
the limit part includes:
the boss is arranged on the valve cover, and the diameter of the boss is larger than that of the valve rod;
the bulge is arranged on the valve rod;
when the limiting component is arranged between the boss and the bulge, the valve rod is limited and cannot move up and down.
When the technical scheme of the utility model is implemented, the limiting part is matched with the limiting component to limit the valve rod, and when the cylinder is in a pressure maintaining state, the limiting component is arranged between the boss and the bulge, so that the valve rod is limited and cannot be moved due to the pressure action in the valve body, and the stability of the stop valve is improved.
Further, the limiting component is a limiting hoop, and the limiting hoop is detachably connected with the valve rod.
Further, the limiting anchor ear is hinged with a fixed shaft, and the limiting anchor ear rotates around the fixed shaft;
when the limiting hoop rotates to the position of the valve rod, the limiting hoop contacts with the valve rod, so that a limiting effect is realized;
when the limit hoop rotates to a position far away from the valve rod, the limit hoop is separated from the valve rod.
Further, the limiting hoop is annular, and the diameter of the limiting hoop is the same as that of the valve rod.
Further, a sealing gasket is arranged between the valve clack and the valve seat and used for improving the sealing effect between the valve clack and the valve seat.
Further, a filler is arranged at the joint of the valve cover and the valve rod, and the filler is used for filling a gap between the valve rod and the valve cover.
The beneficial effects of the utility model are as follows: according to the pneumatic stop valve provided by the utility model, the limiting part is arranged and matched with the limiting component to limit the valve rod, when the cylinder is in a pressure maintaining state, the limiting component is arranged between the boss and the bulge, the valve rod is limited and cannot be moved by the pressure action in the valve body, so that the stability of the stop valve is improved, the limiting component is arranged to be a limiting hoop, the limiting hoop is arranged on the valve rod and is of a detachable design, and a sealing gasket is arranged between the valve clack and the valve seat, so that the sealing effect is improved.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is an overall schematic of a pneumatic shut-off valve of the present utility model;
FIG. 2 is a schematic cross-sectional view of the pneumatic shut-off valve of FIG. 1;
FIG. 3 is an enlarged schematic view of the valve cover of FIG. 1;
FIG. 4 is an enlarged schematic view of the spacing assembly of FIG. 3;
wherein, each reference sign in the figure:
1. a valve body; 2. a valve cover; 3. a cylinder; 11. an inlet; 12. an outlet; 13. a bolt; 14. a valve stem; 15. a valve flap; 16. a valve seat; 17. limiting hoops; 18. a fixed shaft; 121. a protrusion; 131. a boss.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
As shown in fig. 1-2, the utility model provides a pneumatic stop valve, which comprises a valve body 1, wherein the valve body 1 is provided with a valve cavity, two ends of the valve cavity are respectively provided with an inlet 11 and an outlet 12, wherein the inlet 11 is communicated with the outlet 12, and fluid in the stop valve flows unidirectionally along the direction from the inlet 11 to the outlet 12;
the valve body 1 is provided with a valve cover 2, the valve cover 2 is fixedly connected with the valve body through bolts, the valve cover 2 is provided with a through hole, a valve rod 14 is arranged in the through hole, the valve rod 14 is connected with the air cylinder 3, and the valve rod 14 is suitable for moving up and down under the drive of the air cylinder 3;
the other end of the valve rod 14 extends into the valve body 1, a valve clack 15 is connected to the part of the valve rod 14 extending into the valve body 1, the valve clack 15 is suitable for moving synchronously with the valve rod 14, a valve seat 16 is correspondingly arranged in the valve cavity, the valve seat 16 is arranged between the inlet 11 and the outlet 12, the valve seat 16 is matched with the valve clack 15, when the valve clack 15 moves downwards to extend into the valve seat 16 to be in full contact with the sealing surface of the valve seat 16, the inlet 11 and the outlet 12 are blocked, and fluid in a pipeline cannot flow;
in order to improve the tightness, a filling material is arranged between the valve rod 14 and the through hole, and is used for filling gaps between the valve rod 14 and the valve cover 2, so that the gaps between the valve rod 14 and the valve cover 2 in the moving process are prevented, and the sealing is prevented from being invalid; a gasket is provided between the valve flap 15 and the valve seat 16, which gasket serves to enhance the sealing effect between the valve flap 15 and the valve seat 16.
The above description of the structure of the conventional stop valve is not excessively limited in the present utility model, and will not be described in detail later.
As shown in fig. 3 to 4, the upper portion of the valve cover 13 is provided with a boss 131, the boss 131 is also provided with a through hole for receiving the valve stem 14, and the diameter of the boss 131 is larger than that of the valve stem 13 as an upper limit portion;
the valve rod 14 is provided with a bulge 121, the bulge 121 is arranged below the boss 131 and serves as a lower limit part, the upper limit part and the lower limit part form a limit part together, a limit component is arranged between the upper limit part and the lower limit part, and the limit component is matched with the upper limit part and the lower limit part to limit the valve rod 14;
the limiting assembly comprises a limiting hoop 17, wherein the limiting hoop 17 can be fixed to the side face of the valve rod 14, in the embodiment, the limiting hoop 17 is arranged between an upper limiting part and a lower limiting part, the height of the limiting hoop 17 is the same as the distance between the upper limiting part and the lower limiting part, and when the limiting hoop 17 is arranged between the upper limiting part and the lower limiting part, the valve rod 14 can be limited by the limiting hoop 17 and cannot move upwards or downwards;
the limiting hoop 17 is hinged with a fixed shaft 18, the fixed shaft 18 is arranged on the valve cover 13, and the limiting hoop 17 can be separated from the valve rod 14 by rotating the limiting hoop 17 around the fixed shaft 18, so that the limiting hoop 17 and the valve rod 14 can be detachably connected;
when the stop valve is required to be closed, the limit hoop 17 is separated from the valve rod 14, the cylinder 3 is opened, the valve rod 14 is driven to move downwards until the valve clack 15 is in full contact with the sealing surface of the valve seat 16, at the moment, the stop valve is in a closed state, and fluid entering the valve cavity from the inlet 11 stops flowing;
the limiting hoops 17 are arranged between the upper limiting part and the lower limiting part on the valve rod 14, after the air cylinder 3 is closed, fluid at the inlet 11 generates upward pressure and acts on the valve rod 14, the valve rod 14 has upward movement trend, when gaps are generated between the valve clack 15 at the tail end of the valve rod 14 and the valve seat 16, the stop valve is invalid, fluid leaks, and the limiting hoops 17 are respectively contacted with the upper limiting part and the lower limiting part, so that the valve rod 14 cannot move, and the stability of the stop valve is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. A pneumatic shut-off valve comprising:
a valve body (1);
a valve seat (16), wherein the valve seat (16) is arranged inside the valve body (1);
the valve cover (2) is fixedly connected with the valve body;
a valve rod (14), wherein the valve rod (14) penetrates through the valve cover (2), the valve rod (14) is connected with a cylinder (3), and the valve rod (14) is suitable for moving in the valve cover (2) under the driving of the cylinder (3);
the valve clack (15) is connected with the valve rod (14), and the valve clack (15) is used for being connected with the valve seat (16) to realize the sealing of the valve body (1);
the method is characterized in that: the shut-off valve further comprises:
the limiting part is arranged on the valve rod (14);
the limiting assembly is used for being matched with the limiting part to limit the valve rod (14);
the limit part includes:
a boss (131), the boss (131) being arranged on the valve cover (2), the diameter of the boss (131) being larger than the diameter of the valve stem (14);
a protrusion (121), the protrusion (121) being provided on the valve stem (14);
when the limiting component is arranged between the boss (131) and the boss (121), the valve rod (14) is limited and cannot move up and down.
2. A pneumatic shut-off valve as in claim 1 wherein: the limiting assembly is a limiting hoop (17), and the limiting hoop (17) is detachably connected with the valve rod (14).
3. A pneumatic shut-off valve as in claim 2 wherein: the limiting anchor ear (17) is hinged with a fixed shaft (18), and the limiting anchor ear (17) rotates around the fixed shaft (18);
when the limiting hoop (17) rotates to the position of the valve rod (14), the limiting hoop (17) is in contact with the valve rod (14), so that a limiting effect is achieved;
when the limit hoop (17) rotates to a position far away from the valve rod (14), the limit hoop (17) is separated from the valve rod (14).
4. A pneumatic shut-off valve as in claim 2 wherein: the limiting hoop (17) is annular, and the diameter of the limiting hoop (17) is the same as that of the valve rod (14).
5. A pneumatic shut-off valve as in claim 1 wherein: a sealing gasket is arranged between the valve clack (15) and the valve seat (16), and the sealing gasket is used for improving the sealing effect between the valve clack (15) and the valve seat (16).
6. A pneumatic shut-off valve as in claim 1 wherein: the connecting part of the valve cover (2) and the valve rod (14) is provided with a filler, and the filler is used for filling a gap between the valve rod (14) and the valve cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321160198.0U CN219755355U (en) | 2023-05-15 | 2023-05-15 | Pneumatic stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321160198.0U CN219755355U (en) | 2023-05-15 | 2023-05-15 | Pneumatic stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219755355U true CN219755355U (en) | 2023-09-26 |
Family
ID=88087396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321160198.0U Active CN219755355U (en) | 2023-05-15 | 2023-05-15 | Pneumatic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219755355U (en) |
-
2023
- 2023-05-15 CN CN202321160198.0U patent/CN219755355U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |