CN211145379U - High-temperature flue gas butterfly valve and valve rod sealing structure thereof - Google Patents
High-temperature flue gas butterfly valve and valve rod sealing structure thereof Download PDFInfo
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- CN211145379U CN211145379U CN201922170434.7U CN201922170434U CN211145379U CN 211145379 U CN211145379 U CN 211145379U CN 201922170434 U CN201922170434 U CN 201922170434U CN 211145379 U CN211145379 U CN 211145379U
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Abstract
The utility model discloses a high temperature flue gas butterfly valve and valve rod seal structure thereof relates to the valve field, solves the switch dumb of flue gas butterfly valve and butterfly valve of 1000 ℃ high temperature, and the high temperature card hinders, and the upper and lower shaft seal under the high temperature leaks flue gas and medium scheduling problem outward, and it includes axle sleeve and valve rod, the valve rod still overlaps outward and is equipped with packing layer and packing cover, the cover is equipped with a plurality of elastic seal circle by axle sleeve and packing cover centre gripping on the valve rod, elastic seal circle has and has elastic inner circle and does not take elastic outer lane to constitute, the inner circle is the arc and holds tightly the outer circumference of valve rod, elastic seal circle sets up in pairs, and the two is "people" font back to back. The utility model has the advantages of high temperature harsh flue gas medium or high temperature medium are sealed effectual, long service life.
Description
Technical Field
The utility model relates to a valve field, concretely relates to high temperature flue gas butterfly valve and valve rod seal structure thereof.
Background
At present, the flue gas butterfly valve type of industry is various, there are a great deal of unreasonable parts in current butterfly valve project organization, rubber seal part is adopted mostly to current butterfly valve, because the characteristic of rubber limits, its high temperature resistant, high pressure performance and life all are less than other valves, therefore, current flue gas butterfly valve often because the flue gas leakage of packing appears in the reason of high temperature, because the dirt, the smoke and dust that contains easy scale deposit leads to valve rod and axle sleeve in getting into valve rod and the axle sleeve box, valve rod and axle sleeve box, a large amount of scale deposits in valve rod and the valve rod hole, the phenomenon that hardens, make the valve rod just can't rotate after a period of time, lead to the unable switch of valve, the valve is inefficiently, the condition of the unable normal operating. The high temperature that exceeds more than 600 ℃ is hardly used to current flue gas butterfly valve in addition, because the valve rod packing all will use graphite material, graphite surpasss the easy high-temperature oxidation of 600 ℃, so the valve rod dynamic seal of ultrahigh temperature butterfly valve also is an industry technological problem. The valve can not be opened and closed at high temperature, so that the production of a factory is stopped, the temperature of the valve is reduced after the production is stopped, the valve can be flexibly opened and closed, and the valve force often appears at ultrahigh temperature.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of background art, the utility model provides a sealed effectual high temperature flue gas butterfly valve and valve rod seal structure thereof.
The utility model discloses the technical scheme who adopts: the utility model provides a valve rod seal structure of high temperature flue gas butterfly valve, its includes axle sleeve and valve rod, the valve rod still overlaps outward and is equipped with packing layer and axle sleeve box, the cover is equipped with a plurality of elastic seal circle by axle sleeve and axle sleeve box centre gripping on the valve rod, elastic seal circle has and has elastic inner circle and does not take elastic outer lane to constitute, the inner circle is the arc and holds tightly the outer circumference of valve rod, elastic seal circle sets up in pairs, and the two is "people" font back to back.
The elastic sealing ring is J-shaped.
The end of the shaft sleeve box is provided with a step tending to the circle center, and the side surface of the step is matched with the end surface of the shaft sleeve to clamp the outer ring of the elastic sealing ring.
The elastic sealing ring is made of metal materials.
The packing layer comprises packing, a spacer ring and a packing pad, and a first disc-shaped spring is arranged between the shaft sleeves of the packing pad.
The utility model discloses still provide another kind of technical scheme: the utility model provides a high temperature flue gas butterfly valve, its includes linking bridge, valve body, valve plate, drive mechanism and bearing frame, its characterized in that: the valve plate is arranged on the valve rod and is arranged in the inner cavity of the valve body, and the valve rod is arranged in the shaft sleeve and is positioned in the valve body.
The bearing frame is installed the valve body lower extreme, the bearing frame is equipped with fixed connection's gland, the valve rod lower extreme penetrates in the bearing frame, be equipped with the second belleville spring of contradicting the two between valve rod and the gland.
And a radiating fin is arranged outside the shaft sleeve.
The utility model has the advantages that: this technical scheme is through setting up elastic seal circle, and its inner circle self has elasticity, and the outer circumference of holding the valve rod firmly in addition, also exerts the inner circle through the pressure of medium, increases the pressure of inner circle to the valve rod, makes sealed effect better. Because the elastic sealing ring is made of all-metal materials, the elastic sealing ring has good temperature resistance, and the use temperature can be increased to about 1000 ℃ by selecting special high-temperature resistant materials. The problem of filler leakage at two ends of a valve rod when the temperature of a common smoke butterfly valve and a high-temperature butterfly valve exceeds 600 ℃ is solved; two elastic sealing ring back-to-back sets up, and the centre forms a cavity, and pressure wherein is less than the pressure of outside medium, and the medium is exerted for the pressure of an inner circle enclasping valve rod, has improved sealing performance, in addition, if one of them elastic sealing ring became invalid, another did the guarantee in addition, played the effect of dual assurance, had the advantage that sealing reliability is good.
Drawings
Fig. 1 is the utility model discloses embodiment high temperature flue gas butterfly valve's schematic structure diagram.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a cross-sectional view taken at a-a in fig. 1.
Fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.
Fig. 5 is a partially enlarged schematic view of C in fig. 1.
Fig. 6 is a process flow diagram of the elastic sealing ring.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
as shown in the figure, a valve rod seal structure of high temperature flue gas butterfly valve, it includes axle sleeve 1 and valve rod 2, 2 outer still covers of valve rod are equipped with packing layer 3 and axle sleeve box 4, the cover is equipped with a plurality of elastic seal circle 5 by axle sleeve 1 and 4 centre grippings of packing cover on the valve rod 2, elastic seal circle 5 has and has elastic inner circle 51 and does not take elastic outer lane 52 to constitute, inner circle 51 is the arc and embraces tightly the outer circumference of valve rod 2, this technical scheme is through setting up elastic seal circle, and its inner circle self has elasticity, can be firmly embrace the outer circumference of valve rod tightly, in addition, also apply for the inner circle through the pressure of medium, increase the pressure of inner circle to the valve rod, make sealed effect better.
The elastic sealing ring 5 is J-shaped, and the elastic sealing ring 5 is made of metal materials; the elastic sealing ring in the embodiment is a metal sheet, and the specific processing technology is as follows:
the outer ring is clamped by a lathe, then pressure is applied to the inner ring, so that the inner ring is pressed to be bent and deformed, the deformed inner ring automatically has elasticity, the valve rod can be tightly embraced by the inner ring sleeved on the valve rod, and the metal material can resist high temperature.
The tail end of the packing sleeve 4 is provided with a step 41 tending to the circle center, the side face of the step 41 is matched with the end face of the shaft sleeve 1 to clamp the outer ring 52 of the elastic sealing ring 5, and the step and the shaft sleeve clamp the two elastic sealing rings together, so that the elastic sealing rings can be prevented from moving and the sealing effect can be prevented from being influenced.
The packing layer 3 comprises a packing 31, a spacer ring 32 and a packing pad 33, the packing pad 33 is provided with a first disc spring 6 between the shaft sleeves 1, and because the distances between the packing layer and the shaft sleeves and the inner cavity of the valve body are different, and temperature difference exists, different expansion amounts exist, and the movement amount can be compensated by arranging the first disc spring.
The elastic sealing ring 5 and the bottom surface of the shaft sleeve are in a metal surface joint seal, the sealing force of the elastic sealing ring is provided by a packing gland 14, the packing gland is transmitted to the packing gland 14 under the pre-tightening of a nut 16 with an elastic gasket 15 and then transmitted to a packing 31, a spacer ring 32 and a packing pad 33, the packing pad 33 and a first disc-shaped spring 6 are designed with elastic compression allowance, so that enough pre-tightening force is transmitted to the shaft sleeve 1, the shaft sleeve 1 tightly presses the plane of an outer ring 52 of the elastic sealing ring 5, the necessary specific pressure of metal seal is achieved between the bottom surface of the shaft sleeve 4 and the outer ring 52, effective metal seal is formed, the leakage of a medium from the outer ring 52 and the bottom of the shaft sleeve is prevented from entering the packing sleeve at the shaft sleeve and the upper end, and the medium cannot enter gaps among components such as the valve rod, the shaft sleeve and the packing due to the elastic, the phenomenon that smoke dust and a gap of a medium easy to scale are hardened and blocked is avoided, and the gap between the outer circle of the valve rod and the 41 cylindrical surface is large and short in distance, so that a scaling clamping group is not easy to form, and the valve cannot be opened or closed.
The complete sealing between the elastic sealing ring 5 and the valve rod and the bottom of the shaft sleeve box effectively blocks high-temperature media, the high-temperature media cannot enter a gap of the shaft sleeve and the stuffing box, so the temperature at the position is lower, and in addition, the heat radiating fins are arranged outside the shaft sleeve box, the temperature is greatly reduced, so when the valve is in a working condition of 1000 ℃, the temperature of the stuffing box can be completely controlled below 600 ℃, then the stuffing sealing is only a safe second secondary sealing, and only a small amount of dust-free smoke enters the gap when trace leakage occurs after the first elastic sealing is used for a long time, and scaling and hardening are avoided. After the elastic sealing surface is processed twice, the pressure of smoke is greatly reduced, and the packing sealing effect under extremely low pressure is good.
The utility model discloses still provide another kind of technical scheme: the utility model provides a high temperature flue gas butterfly valve, its includes linking bridge 7, valve body 8, valve plate 9, drive mechanism 10 and bearing frame 11, its characterized in that: the sealing structure is distributed at the upper end and the lower end of the valve rod 2, the valve plate 9 is installed on the valve rod 2 and is arranged in the inner cavity of the valve body 8, and the valve rod 2 is arranged in the shaft sleeve 1 and is positioned in the valve body 8.
The bearing frame 11 is installed 8 lower extremes of valve body, the bearing frame is equipped with fixed connection's gland 14, 2 lower extremes of valve rod penetrate in the bearing frame 11, be equipped with the second belleville spring 12 of contradicting the two between valve rod and the gland 14, the second belleville spring can exert a thrust to the valve rod lower extreme, has a thrust left before making, makes the valve rod can not take place the drunkenness to seal structure's sealed effect has been influenced. The main function of the second butterfly spring is that the temperature of each part of the valve is not completely consistent and has a small amount of temperature difference when the valve is at ultrahigh temperature, then the valve rod has a small amount of extension towards the direction of the gland 14 when the valve rod is reacted by different thermal expansion, and the second spring group is compressed to absorb the extension amount, so that the high-temperature blockage is avoided.
The shaft sleeve 4 is externally provided with the radiating fins 13, and the radiating fins are arranged to play a role in quickly radiating, reduce the temperature and prolong the service life.
The invention provides a smoke butterfly valve which can solve the problems that the smoke butterfly valve and the butterfly valve with high temperature of 1000 ℃ are flexible to open and close and are free from high-temperature blockage, and smoke, media and the like cannot leak out when the upper shaft and the lower shaft are sealed at high temperature. The elastic sealing rings 5 are arranged at the positions, close to the inner flow channel of the valve body, of the upper end and the lower end of the valve rod, so that high-temperature media, media prone to scaling and hardening or smoke dust are effectively prevented from entering the positions, such as the shaft of the valve rod, the shaft sleeve box or the packing sleeve packing box, and the valve rod is prevented from being blocked due to inconsistent high-temperature deformation and provided with the second butterfly-shaped group.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.
Claims (8)
1. The utility model provides a valve rod seal structure of high temperature flue gas butterfly valve, its includes axle sleeve (1) and valve rod (2), valve rod (2) still overlap outward and are equipped with packing layer (3) and axle sleeve box (4), its characterized in that: the cover is equipped with a plurality of elastic sealing ring (5) by axle sleeve (1) and axle sleeve box (4) bottom centre gripping on valve rod (2), elastic sealing ring (5) have elastic inner circle (51) and do not take elastic outer lane (52) to constitute, inner circle (51) are the arc and hold tightly the outer circumference of valve rod (2), elastic sealing ring (5) set up in pairs, and the two is "people" font back to back.
2. The valve rod sealing structure of the high-temperature flue gas butterfly valve according to claim 1, characterized in that: the elastic sealing ring (5) is J-shaped.
3. The valve rod sealing structure of the high-temperature flue gas butterfly valve according to claim 1, characterized in that: the end of the shaft sleeve box (4) is provided with a step (41) tending to the circle center, and the side surface of the step (41) is matched with the end surface of the shaft sleeve (1) to clamp the outer ring (52) of the elastic sealing ring (5).
4. The valve rod sealing structure of the high-temperature flue gas butterfly valve according to claim 1, characterized in that: the elastic sealing ring (5) is made of metal materials.
5. The valve rod sealing structure of the high-temperature flue gas butterfly valve according to claim 1, characterized in that: the packing layer (3) comprises packing (31), a spacer ring (32) and a packing pad (33), wherein a first disc-shaped spring (6) is arranged between the packing pad (33) and the shaft sleeve (1).
6. The utility model provides a high temperature flue gas butterfly valve, its includes linking bridge (7), valve body (8), valve plate (9), drive mechanism (10) and bearing frame (11), its characterized in that: the sealing structure of any one of claims 1 to 5 is further comprised, the sealing structure is distributed at the upper end and the lower end of the valve rod (2), the valve plate (9) is installed on the valve rod (2) and is arranged in the inner cavity of the valve body (8), and the valve rod (2) is arranged in the shaft sleeve (1) and is positioned in the valve body (8).
7. The high-temperature flue gas butterfly valve of claim 6, wherein: bearing frame (11) are installed valve body (8) lower extreme, the bearing frame is equipped with fixed connection's gland (14), valve rod (2) lower extreme penetrates in bearing frame (11), be equipped with between valve rod and gland (14) conflict the two second belleville spring (12).
8. The high-temperature flue gas butterfly valve of claim 6, wherein: and a radiating fin (13) is arranged outside the shaft sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170434.7U CN211145379U (en) | 2019-12-06 | 2019-12-06 | High-temperature flue gas butterfly valve and valve rod sealing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170434.7U CN211145379U (en) | 2019-12-06 | 2019-12-06 | High-temperature flue gas butterfly valve and valve rod sealing structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211145379U true CN211145379U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922170434.7U Active CN211145379U (en) | 2019-12-06 | 2019-12-06 | High-temperature flue gas butterfly valve and valve rod sealing structure thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339526A (en) * | 2021-06-08 | 2021-09-03 | 法比亚阀门工业(苏州)有限公司 | High-temperature-resistant low-leakage special butterfly valve for environment-friendly exhaust system |
| CN117141710A (en) * | 2023-10-30 | 2023-12-01 | 西安现代控制技术研究所 | Hypersonic folding airfoil surface gap air flow partition structure |
-
2019
- 2019-12-06 CN CN201922170434.7U patent/CN211145379U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339526A (en) * | 2021-06-08 | 2021-09-03 | 法比亚阀门工业(苏州)有限公司 | High-temperature-resistant low-leakage special butterfly valve for environment-friendly exhaust system |
| CN117141710A (en) * | 2023-10-30 | 2023-12-01 | 西安现代控制技术研究所 | Hypersonic folding airfoil surface gap air flow partition structure |
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