CN109869489B - Ventilation cut-off valve group - Google Patents
Ventilation cut-off valve group Download PDFInfo
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- CN109869489B CN109869489B CN201910191818.9A CN201910191818A CN109869489B CN 109869489 B CN109869489 B CN 109869489B CN 201910191818 A CN201910191818 A CN 201910191818A CN 109869489 B CN109869489 B CN 109869489B
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Abstract
The invention discloses a ventilation cut-off valve group, which comprises a plurality of valve bodies arranged in parallel and a common cavity connected with the valve bodies, wherein the valve bodies comprise a valve shell, a valve rod and a valve rod supporting frame; the valve rod supporting frame is sleeved on the periphery of the valve rod and is positioned in the valve cavity; the valve rod support is provided with a sealing support and a sealing assembly. The advantages are that: the buffer spring is arranged between the first valve cover and the second valve cover, and the flexible sealing element is arranged in the sealing groove, so that the damage of the first valve cover to the sealing part is reduced, and the service life of the valve group is prolonged; meanwhile, the sealing assembly is arranged, so that the sealing performance between the valve rod and the valve rod supporting frame is ensured, and the gas stored between the valve rod and the valve rod supporting frame is prevented from leaking.
Description
Technical Field
The invention relates to the field of valves, in particular to a ventilation cut-off valve group.
Background
Along with economic development, the industrial automation control level is continuously improved, the working condition is more and more complex, and the requirements on the reliability and the economy of the cut-off valve in process control are also continuously improved. Therefore, higher demands are also placed on the valve body structure.
The gap between the valve body and the valve rod is sealed by adopting packing, the packing is seriously abraded, and the packing is troublesome to replace. The valve cover plate is sealed by adopting a sealing ring, so that the valve cover plate is easy to corrode and age, especially when corrosive gas exists. The existing shut-off valve technology is generally high in cost. Therefore, it is necessary to develop a shut-off valve which is convenient to use, good in sealing effect and economical.
Disclosure of Invention
It is an object of the present invention to provide a breather shutoff valve assembly that solves the aforementioned problems of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a vent cut-off valve group comprises a plurality of valve bodies arranged side by side and a common chamber connected with the valve bodies, wherein the valve bodies comprise a valve casing, a valve rod and a valve rod supporting frame, the valve casing is hollow to form a valve chamber, a vent hole connected with the common chamber is formed in the top of the valve casing, a first end of the valve rod penetrates through the vent hole to be connected with a first valve cover, the first valve cover moves away from or covers the vent hole along with the valve rod, and a second end of the valve rod penetrates through the bottom of the valve casing to be connected with a driving device; the valve rod supporting frame is sleeved on the periphery of the valve rod and is positioned in the valve cavity; the valve rod support frame is close to the week side of the one end of blow vent, be provided with the coaxial seal holder of valve rod support frame, seal holder week in be provided with the coaxial seal assembly of seal holder, seal assembly internal perisporium with the periphery wall of valve rod corresponds the laminating, the seal assembly top be provided with the coaxial piece that compresses tightly of seal assembly, the lower extreme that compresses tightly with the upper end of seal assembly closely laminates.
Preferably, the sealing assembly comprises a first sealing element, a second sealing element and an elastic element which are sequentially and coaxially arranged from top to bottom, and the upper end and the lower end of the elastic element are respectively in contact with and fixed to the first sealing element and the second sealing element.
Preferably, the top end of the sealing support exceeds the upper end face of the valve rod support frame, and the circumferential edge of the top end of the sealing support protrudes outwards along the radial direction of the valve rod to form a first folding edge; the top end of the pressing piece exceeds a horizontal plane where the first folding edge is located, the circumferential edge of the top end of the pressing piece protrudes outwards in the radial direction of the valve rod to extend to form a second folding edge, the lower end of the pressing piece is in contact with the upper end of the first sealing piece, and the fastening piece penetrates through the first folding edge, the second folding edge and the valve rod supporting frame to fixedly connect the sealing support, the pressing piece and the valve rod supporting frame.
Preferably, the first end of the valve rod vertically penetrates through the first valve cover to be fixedly connected with the second valve cover, the second valve cover is arranged in parallel with the first valve cover, and the first valve cover and the second valve cover are coaxially arranged with the valve rod; and a plurality of buffer springs are arranged between the first valve cover and the second valve cover along the circumferential direction of the valve rod, and two ends of each buffer spring are fixedly connected with the first valve cover and the second valve cover respectively.
Preferably, a blocking member is arranged on the valve rod, and the blocking member is arranged below the first valve cover and close to the first valve cover.
Preferably, the valve casing top is followed vent circumference is provided with cyclic annular sealing, the sealing is followed the axis direction of valve rod upwards protrusion extends, the circumference edge of first valve gap be provided with the cyclic annular seal groove that the sealing corresponds, the sealing corresponds and stretches into in the seal groove.
Preferably, a flexible sealing element is arranged in the sealing groove.
The invention has the beneficial effects that: 1. the setting of buffer spring can reduce the damage that first valve gap caused the valve body at the in-process that falls back, prolongs the life-span of valves. 2. The sealing assembly arranged on the valve rod supporting frame can effectively ensure that gas between the valve rod and the valve rod supporting frame is not leaked. 3. The traditional packing that has replaced sealing assembly's setting is sealed, can effectively reduce the maintenance number of times of sealed department, makes the life of valves longer, and partial sealing material can be saved in the setting of elastic component, and is more economical. 4. Set up flexible sealing member in the seal groove, can effectively strengthen the leakproofness of first valve gap and blow vent, increase the valves gas tightness.
Drawings
FIG. 1 is a schematic view of a shut-off valve in an embodiment of the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C in an embodiment of the present invention;
fig. 5 is a partial enlarged view of fig. 1 at D in the embodiment of the present invention.
In the figure: 1. a valve housing; 2. a valve cavity; 3. a valve stem; 4. a valve stem support frame; 5. sealing the bracket; 6. a first folded edge; 7. a compression member; 8. a second folded edge; 9. a first seal member; 10. an elastic member; 11. a second seal member; 12. a first valve cover; 13. a sealing groove; 14. a second valve cover; 15. a buffer spring; 16. a blocking member; 17. a fastener; 18. a vent; 19. a sealing part; 20. a common chamber; 21. a drive device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, the present invention provides a gas-permeable shut-off valve group, the shut-off valve group comprises a plurality of valve bodies arranged side by side and a common chamber 20 connected with each valve body, the valve body comprises a valve housing 1, a valve rod 3 and a valve rod support frame 4, the valve housing 1 is hollow to form a valve cavity 2, the top of the valve housing 1 is provided with a vent 18 connected with the common chamber 20, a first end of the valve rod 3 passes through the vent 18 to be connected with a first valve cover 12, the first valve cover 12 moves away from or covers the vent 18 with the valve rod 3, and a second end of the valve rod 3 passes through the bottom of the valve housing 1 to be connected with a driving device 21; the valve rod support frame 4 is sleeved on the periphery of the valve rod 3 and is positioned in the valve cavity 2; valve rod support frame 4 is close to the interior week side of the one end of blow vent 18 be provided with valve rod support frame 4 coaxial seal carrier 5, seal carrier 5 interior week be provided with the coaxial seal assembly of seal carrier 5, the laminating is corresponded with the periphery wall of valve rod 3 to the internal perisporium of seal assembly, the seal assembly top be provided with the coaxial piece 7 that compresses tightly of seal assembly, the lower extreme that compresses tightly 7 with the upper end of seal assembly closely laminates. The cut-off valve group can effectively realize the flow of air current between each valve body and the public chamber 20, and the valve rod 3 and the valve rod support frame 4 are sealed by adopting a sealing component to replace the traditional packing seal, thereby fundamentally avoiding the troubles of packing abrasion and packing replacement.
Example one
As shown in fig. 2, in this embodiment, the sealing assembly includes a first sealing element 9, a second sealing element 11, and an elastic element 10, which are coaxially disposed in sequence from top to bottom, and an upper end and a lower end of the elastic element 10 are respectively fixed in contact with the first sealing element 9 and the second sealing element 11. The lower end of the first sealing element 9 is fixedly connected with the upper end of the elastic element 10, the lower end of the elastic element 10 is fixedly connected with the upper end of the second sealing element 11, so that the first sealing element 9, the elastic element 10 and the second sealing element 11 form a sealing assembly, and the first sealing element 9, the elastic element 10 and the second sealing element 11 are respectively and independently arranged and fixedly connected or are integrally formed.
In this embodiment, the top end of the sealing support 5 exceeds the upper end face of the valve rod support frame 4, and the circumferential edge of the top end of the sealing support 5 protrudes and extends outwards along the radial direction of the valve rod 3 to form a first folding edge 6; the top end of the pressing piece 7 exceeds the horizontal plane where the first folding edge 6 is located, the circumferential edge of the top end of the pressing piece 7 protrudes outwards along the radial direction of the valve rod 3 to form a second folding edge 8, the lower end of the pressing piece 7 is in contact with the upper end of the first sealing piece 9, and the fastening piece 17 penetrates through the first folding edge 6, the second folding edge 8 and the valve rod supporting frame 4 to fixedly connect the sealing support 5, the pressing piece 7 and the valve rod supporting frame 4. The gas stored in the cavity formed between the valve rod 3 and the valve rod support frame 4 can not leak out to pollute the gas in the valve cavity 2.
In this embodiment, traditional packing seal has been replaced in sealing assembly's setting, not only can be less the maintenance frequency, still has good sealed effect of saying, effectively avoids the gas leakage between valve rod 3 and the valve rod support frame 4 to get into in the valve chamber 2. Simultaneously, the setting that compresses tightly 7 can make and closely laminate between seal assembly and the valve rod 3, further improves the sealing performance between valve rod 3 and the valve rod support frame 4, avoids the gas between valve rod 3 and the valve rod support frame 4 to leak.
Example two
As shown in fig. 3 to 4, in the present embodiment, a first end of the valve rod 3 vertically penetrates through the first valve cover 12 and is fixedly connected with the second valve cover 14, the second valve cover 14 is arranged parallel to the first valve cover 12, and both the first valve cover 12 and the second valve cover 14 are arranged coaxially with the valve rod 3; a plurality of buffer springs 15 are arranged between the first valve cover 12 and the second valve cover 14 along the circumferential direction of the valve rod 3, and two ends of each buffer spring 15 are fixedly connected with the first valve cover 12 and the second valve cover 14 respectively. The setting of buffer spring 15 can make first valve gap 12 can not produce great damage to the flexible sealing material in valve casing 1 top and the seal groove 13 to the in-process that falls back to valve casing 1 top, under buffer spring 15's effect, can make the slow cover vent 18 of first valve gap 12, avoids first valve gap 12 and the violent striking in valve casing 1 top, makes the slow atress of sealing material, the life of extension valves. Fig. 3 shows the valve body in an open state, and fig. 4 shows the valve body in a closed state.
In this embodiment, the valve rod 3 is provided with a blocking member 16, the blocking member 16 is disposed under the first valve cap 12 in close proximity to the first valve cap 12, and the blocking member 16 can not only provide support for the first valve cap 12, but also limit the descending position of the second valve cap 14 in the descending process of the first valve cap 12, so as to ensure that the first valve cap 12 can effectively keep away from or cover the vent 18.
In this embodiment, the common chamber 20 completely covers the vent 18, and the first and second valve caps 12, 14 are both disposed in the common chamber 20.
EXAMPLE III
As shown in fig. 5, in the present embodiment, an annular sealing portion 19 is provided at the top of the valve housing 1 along the circumferential direction of the vent 18, the sealing portion 19 extends in an upward protruding manner along the axial direction of the valve rod 3, an annular sealing groove 13 corresponding to the sealing portion 19 is provided at the circumferential edge of the first bonnet 12, and the sealing portion 19 correspondingly extends into the sealing groove 13. When the first bonnet 12 moves upward with the valve stem 3 and away from the vent 18, the seal 19 separates from the seal groove 13 and the gas in the valve cavity 2 of each valve body exchanges with the gas in the common chamber 20.
In this embodiment, be provided with flexible sealing element in the seal groove 13, when sealing 19 corresponds when stretching into in the seal groove 13, flexible sealing element can improve the sealing performance between sealing 19 and the seal groove 13, guarantees the sealing performance between first valve gap 12 and the vent 18 between the two, avoids gaseous exchange. Meanwhile, due to the arrangement of the flexible sealing element, when the first valve cover 12 falls back to the vent 18, the impact between the first valve cover 12 and the valve shell 1 is weakened, the valve body is prevented from being damaged by the impact, and the service life of the valve group is prolonged.
In this embodiment, the working process of the valve group is as follows: as shown in fig. 3, the driving device 21 drives the valve rod 3 to move upwards, the valve rod 3 moves to drive the first valve cover 12 and the second valve cover 14 to move upwards, the sealing groove 13 on the first valve cover 12 is separated from the sealing part 19 at the vent 18, the vent 18 is opened, and the gas in the common chamber 20 is exchanged with the gas in the valve cavity 2; as shown in fig. 4, the driving device 21 drives the valve rod 3 to move downward again, the first bonnet 12 and the second bonnet 14 move downward along with the valve rod 3, the first bonnet 12 correspondingly covers the vent 18, the sealing groove 13 and the sealing portion 19 are correspondingly clamped, the sealing material in the sealing groove 13 can enable the sealing groove 13 and the sealing portion 19 to be matched and attached together, the sealing performance between the sealing groove 13 and the sealing portion 19 is ensured, and the first bonnet 12 blocks the valve body from exchanging with the gas in the common chamber 20.
In this embodiment, buffer spring 15 is at the in-process that first valve gap 12 falls back to air vent 18, and when first valve gap 12 contacted with valve casing 1, buffer spring 15 provided a cushioning power for first valve gap 12, guarantees that first valve gap 12 can be stable cover in air vent 18 department, can not strike the flexible sealing material in valve casing 1 and the seal groove 13 when making first valve gap 12 move down, causes the damage of first valve gap 12, second valve gap 14 and valve casing 1, the life of extension valves simultaneously.
In this embodiment, when the valve group is used, the plurality of valve bodies are arranged in parallel, no gap is formed between the valve bodies, when the vent holes on the valve bodies are opened, gas exchange can be performed between the valve cavity 2 and the valve cavity 2, gas exchange can also be performed between the valve cavity 2 and the common chamber 20, and gas exchange between the plurality of valve bodies and the common chamber 20 is realized.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
according to the air-vent cut-off valve bank, the traditional packing sealing is replaced by the sealing assembly, so that the maintenance frequency of the valve bank is reduced, and the service life of the valve bank is prolonged; the impact force between the first valve cover and the valve shell can be effectively reduced by arranging the buffer spring, the service life of the valve body is prolonged, and the noise generated when the first valve cover is far away from or covers the air vent is also reduced; meanwhile, the arrangement of the elastic piece in the sealing assembly can save part of sealing materials, and when the first sealing piece and the second sealing piece are damaged a little, the sealing assembly can still be used under the action of the elastic piece, so that the economic benefit is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (2)
1. A vent shut off valve assembly, comprising: the valve block comprises a plurality of valve bodies arranged in parallel and a common cavity connected with the valve bodies, each valve body comprises a valve casing, a valve rod and a valve rod supporting frame, the valve casing is hollow to form a valve cavity, the top of the valve casing is provided with a vent connected with the common cavity, the first end of the valve rod penetrates through the vent to be connected with a first valve cover, the first valve cover moves away from or covers the vent along with the valve rod, and the second end of the valve rod penetrates through the bottom of the valve casing to be connected with a driving device; the valve rod supporting frame is sleeved on the periphery of the valve rod and is positioned in the valve cavity; a sealing support which is coaxial with the valve rod support is arranged on the inner periphery of one end, close to the air vent, of the valve rod support, a sealing assembly which is coaxial with the sealing support is arranged on the inner periphery of the sealing support, the inner peripheral wall of the sealing assembly is correspondingly attached to the outer peripheral wall of the valve rod, a pressing piece which is coaxial with the sealing assembly is arranged above the sealing assembly, and the lower end of the pressing piece is tightly attached to the upper end of the sealing assembly;
a blocking piece is arranged on the valve rod and is arranged below the first valve cover in the mode of being close to the first valve cover;
the top of the valve shell is provided with an annular sealing part along the circumferential direction of the vent, the sealing part extends upwards in a protruding manner along the axial direction of the valve rod, the circumferential edge of the first valve cover is provided with an annular sealing groove corresponding to the sealing part, and the sealing part correspondingly extends into the sealing groove;
a flexible sealing element is arranged in the sealing groove;
the sealing assembly comprises a first sealing element, a second sealing element and an elastic element which are coaxially arranged from top to bottom in sequence, wherein the upper end and the lower end of the elastic element are respectively in contact with and fixed with the first sealing element and the second sealing element;
the top end of the sealing support exceeds the upper end face of the valve rod support frame, and the circumferential edge of the top end of the sealing support protrudes outwards along the radial direction of the valve rod to form a first folded edge; the top end of the pressing piece exceeds a horizontal plane where the first folding edge is located, the circumferential edge of the top end of the pressing piece protrudes outwards in the radial direction of the valve rod to extend to form a second folding edge, the lower end of the pressing piece is in contact with the upper end of the first sealing piece, and the fastening piece penetrates through the first folding edge, the second folding edge and the valve rod supporting frame to fixedly connect the sealing support, the pressing piece and the valve rod supporting frame.
2. The set of air vent shut off valves of claim 1, wherein: the first end of the valve rod vertically penetrates through the first valve cover and is fixedly connected with the second valve cover, the second valve cover is arranged in parallel with the first valve cover, and the first valve cover and the second valve cover are coaxially arranged with the valve rod; and a plurality of buffer springs are arranged between the first valve cover and the second valve cover along the circumferential direction of the valve rod, and two ends of each buffer spring are fixedly connected with the first valve cover and the second valve cover respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191818.9A CN109869489B (en) | 2019-03-14 | 2019-03-14 | Ventilation cut-off valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191818.9A CN109869489B (en) | 2019-03-14 | 2019-03-14 | Ventilation cut-off valve group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109869489A CN109869489A (en) | 2019-06-11 |
| CN109869489B true CN109869489B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910191818.9A Active CN109869489B (en) | 2019-03-14 | 2019-03-14 | Ventilation cut-off valve group |
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| CN (1) | CN109869489B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3834662A (en) * | 1972-05-31 | 1974-09-10 | American Air Filter Co | Damper |
| CN2039777U (en) * | 1988-09-23 | 1989-06-21 | 刘文成 | All sealing valve |
| CN2648219Y (en) * | 2003-09-08 | 2004-10-13 | 洪元生 | Spring type valve rod sealing structure |
| CN201507657U (en) * | 2009-08-17 | 2010-06-16 | 江苏亿金环保设备工程有限公司 | Bypass valve |
| CN203297635U (en) * | 2013-06-09 | 2013-11-20 | 中国能建集团装备有限公司北京技术中心 | Lifting-type fully-sealed valve |
| CN206369001U (en) * | 2016-12-26 | 2017-08-01 | 佛山市三叶环保设备工程有限公司 | Lower sealing stage valve built in a kind of sack cleaner |
| CN107339469B (en) * | 2017-08-14 | 2023-09-05 | 维珂瑞（北京）环境科技有限公司 | Maintenance-free multi-cavity type cutoff valve group |
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2019
- 2019-03-14 CN CN201910191818.9A patent/CN109869489B/en active Active
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| CN109869489A (en) | 2019-06-11 |
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