CN219841059U - Poppet valve sealing structure for RTO - Google Patents
Poppet valve sealing structure for RTO Download PDFInfo
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- CN219841059U CN219841059U CN202321102631.5U CN202321102631U CN219841059U CN 219841059 U CN219841059 U CN 219841059U CN 202321102631 U CN202321102631 U CN 202321102631U CN 219841059 U CN219841059 U CN 219841059U
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- 238000007789 sealing Methods 0.000 title claims abstract description 77
- 230000007774 longterm Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 230000009975 flexible effect Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model relates to a poppet valve, in particular to a poppet valve sealing structure for RTO. The utility model relates to a lifting valve sealing structure for RTO, which comprises an upper layer valve plate, wherein the bottom surface of the upper layer valve plate is connected with a lower layer valve plate, an upper tightening assembly and a lower tightening assembly are clamped between the upper surface and the lower surface of the upper layer valve plate and are connected with a pneumatic valve actuator, and the bottom surface of the lower layer valve plate is abutted with a fixed annular sealing surface. The annular sealing surface is provided with an annular groove, the inside of the annular groove is provided with a seal Fang Sheng, and the height of the square sealing rope is greater than the depth of the annular groove. The sealing square rope is in a protruding state in an uncompressed state, and a good sealing structure can be formed with the bottom surface of the lower valve plate when the pneumatic valve actuator compresses and seals the sealing square rope. The utility model provides a double-layer valve plate and double-sealing structure, wherein the valve plate can realize sealing compensation on a sealing surface, and the double-sealing further ensures the sealing degree, thereby realizing the sealing requirement of an RTO process on the long-term operation of a lift valve.
Description
Technical Field
The utility model relates to a poppet valve, in particular to a poppet valve sealing structure for RTO.
Background
In the environment-friendly treatment of VOCs, a heat accumulating type thermal incinerator (RTO) is an efficient organic waste gas treatment device, and the VOCs removal efficiency is required to be more than or equal to 99%, so that the leakage rate of a valve is important in the whole system, and the purification efficiency of the whole device is determined to a great extent due to the fact that the concentration of pollutants in waste gas is generally high, and the final treatment effect of the device is directly influenced.
The core factor influencing the leakage rate of the poppet valve is the contact sealing degree of the valve plate and the sealing surface. Currently, a poppet valve plate used by RTO generally adopts a single-piece valve plate, and plays a role in sealing through contact between the valve plate and a sealing surface; however, due to the thicker single-piece valve plate, the flatness in long-term operation cannot be ensured, and the contact compactness with the sealing surface is further affected, so that the leakage of the poppet valve is caused. Still other poppet sealing surfaces typically employ a single form of sealing surface, either a hard seal or a soft seal. Most RTO lifting valves are sealed in a soft sealing mode of glass fiber or polytetrafluoroethylene square ropes made of high-temperature resistant materials, contact surfaces are in plane contact, and valve plates are tightly contacted after being compressed on the upper planes of the square ropes, so that the sealing effect is achieved, but in actual use, the valve in the form still has a trace amount of air leakage, and the treatment efficiency is affected. The valve plate and the sealing end face of the other poppet valve realize hard sealing through direct contact, and the following problems exist in operation: after the valve plate is closed, the sealing is not tight due to low machining and assembly precision, or the valve plate and the sealing end face of the poppet valve are corroded and damaged to different degrees due to long-term operation, waste gas flows under the pressure effect, a small amount of internal leakage is formed at the valve plate, the waste gas is not directly discharged through the heat accumulator and the combustion chamber, and the discharge index is more strict due to the fact that even a small amount of leakage can greatly influence the discharge index, the sealing performance, the corrosion resistance and the durability of the valve are improved through transformation, and the device can meet the requirement of long-term stable operation under the existing working condition.
Disclosure of Invention
The utility model provides a sealing structure of a poppet valve for RTO, which aims to solve the problem that the poppet valve is easy to leak.
In order to solve the problems, the technical scheme of the utility model is as follows:
the utility model relates to a lifting valve sealing structure for RTO, which comprises an upper layer valve plate, wherein the bottom surface of the upper layer valve plate is connected with a lower layer valve plate, an upper tightening assembly and a lower tightening assembly are clamped between the upper surface and the lower surface of the upper layer valve plate and are connected with a pneumatic valve actuator, and the bottom surface of the lower layer valve plate is abutted with a fixed annular sealing surface.
The upper layer valve plate can play a role in guaranteeing the strength of the whole valve plate.
When the lower-layer valve plate is in contact with the fixed annular sealing surface, flexible deformation occurs under the action of the tension force of the pneumatic valve actuator, and the sealing effect can be ensured under the condition that the fixed annular sealing surface is uneven by utilizing the flexible action of the lower-layer valve plate, so that the problem of uneven sealing surface caused by inaccurate machining or long-term operation can be solved.
Further, the diameter of the upper layer valve plate is smaller than that of the lower layer valve plate.
Further, the diameter of the lower valve plate is larger than the outer diameter of the fixed annular sealing surface.
Further, the annular sealing surface is provided with an annular groove.
Further, a seal Fang Sheng is arranged inside the annular groove.
Further, the height of the sealing square rope is larger than the depth of the annular groove.
The sealing square rope is in a protruding state in an uncompressed state, and a good sealing structure can be formed with the bottom surface of the lower valve plate when the pneumatic valve actuator compresses and seals the sealing square rope.
The poppet valve sealing structure for RTO is positioned in the air distribution chamber of the RTO device.
The beneficial effects of the utility model are as follows:
(1) The utility model provides a double-layer valve plate and double-sealing structure, the valve plate can realize sealing compensation to a certain degree on a sealing surface, and the double-sealing further ensures the sealing degree, thereby realizing the sealing requirement of an RTO process on the long-term operation of a lift valve.
(2) The upper-layer valve plate can play a role in guaranteeing the strength of the whole valve plate.
(3) When the lower-layer valve plate is in contact with the annular sealing surface, the lower-layer valve plate flexibly deforms under the action of the tensile force of the pneumatic valve actuator, and the sealing effect of the lower-layer valve plate can be ensured under the condition that the annular sealing surface is uneven by utilizing the flexible action of the lower-layer valve plate, so that the problem of uneven sealing surface caused by inaccurate machining or long-term operation can be solved.
(4) The sealing square rope is in a protruding state in an uncompressed state, and can form a good sealing structure with the bottom surface of the lower valve plate when the pneumatic valve actuator compresses and seals the sealing square rope.
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 and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic diagram of a closed seal condition of a poppet valve seal structure for RTO according to the present utility model;
FIG. 2 is a schematic diagram of the opening state of the poppet valve seal structure for RTO according to the present utility model;
FIG. 3 is a top view of the poppet stationary annular sealing surface for RTO according to the present utility model;
in the figure: 1. an upper layer valve plate; 2. a lower valve plate; 3. a tightening assembly; 4. a stationary annular sealing surface; 5. a seal Fang Sheng; 6. an air distribution chamber of the RTO device; 7. a pneumatic valve actuator.
Detailed Description
The utility model will be described in more detail with reference to examples.
In one embodiment, as shown in fig. 1-3, a poppet valve sealing structure for RTO comprises an upper layer valve plate 1, wherein the bottom surface of the upper layer valve plate 1 is connected with a lower layer valve plate 2, an upper tightening component 3 is clamped between the upper surface and the lower surface of the upper layer valve plate 1 and the lower layer valve plate 2, the lower end of the upper tightening component 3 is connected with a pneumatic valve actuator 7, and the bottom surface of the lower layer valve plate 2 is abutted with a fixed annular sealing surface 4.
The upper layer valve plate 1 can play a role in guaranteeing the strength of the whole valve plate.
When the lower-layer valve plate 2 is in contact with the fixed annular sealing surface 4, flexible deformation occurs under the action of the tension force of the pneumatic valve actuator 7, and the sealing effect can be ensured under the condition that the fixed annular sealing surface 4 is uneven by utilizing the flexible action of the lower-layer valve plate 2, so that the problem of uneven sealing surface caused by inaccurate machining or long-term operation can be solved.
It will be appreciated that the diameter of the upper valve plate 1 is smaller than the diameter of the lower valve plate 2.
It will be appreciated that the diameter of the lower valve plate 2 is greater than the outer diameter of the stationary annular sealing surface 4.
It will be appreciated that the annular sealing surface is provided with an annular groove.
It will be appreciated that the annular groove is internally provided with a sealing square rope 5.
It will be appreciated that the height of the sealing square rope 5 is greater than the depth of the annular groove.
The sealing square rope 5 is in a convex state in an uncompressed state, and can form a good sealing structure with the bottom surface of the lower valve plate 2 when the pneumatic valve actuator 7 compresses and seals the sealing square rope.
The poppet valve sealing structure for RTO is positioned in the air distribution chamber 6 of the RTO device.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.
Claims (6)
1. The utility model provides a poppet valve seal structure for RTO, its characterized in that includes upper valve plate (1), lower floor valve plate (2) are connected to upper valve plate (1) bottom surface, and upper and lower tight subassembly (3) are held to upper and lower two sides of upper valve plate (1) and lower floor valve plate (2), pneumatic valve executor (7) are connected to upper and lower tight subassembly (3) lower extreme, lower floor valve plate (2) bottom surface and fixed annular seal face (4) butt.
2. Poppet valve sealing arrangement for RTO according to claim 1, characterized in that the diameter of the upper valve plate (1) is smaller than the diameter of the lower valve plate (2).
3. Poppet valve seal arrangement for RTO according to claim 2, characterized in that the diameter of the lower valve plate (2) is larger than the outer diameter of the stationary annular sealing surface (4).
4. A poppet valve seal arrangement for RTO according to claim 3, characterized in that the stationary annular sealing surface (4) is provided with an annular groove.
5. The poppet valve seal structure for RTO of claim 4, wherein a seal Fang Sheng (5) is provided inside the annular groove.
6. The poppet valve seal structure for RTO of claim 5, wherein a height of the seal Fang Sheng (5) is greater than a depth of the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321102631.5U CN219841059U (en) | 2023-05-06 | 2023-05-06 | Poppet valve sealing structure for RTO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321102631.5U CN219841059U (en) | 2023-05-06 | 2023-05-06 | Poppet valve sealing structure for RTO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219841059U true CN219841059U (en) | 2023-10-17 |
Family
ID=88303170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321102631.5U Active CN219841059U (en) | 2023-05-06 | 2023-05-06 | Poppet valve sealing structure for RTO |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219841059U (en) |
-
2023
- 2023-05-06 CN CN202321102631.5U patent/CN219841059U/en active Active
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