CN221034001U - Butterfly valve rod bearing sealing structure of marine high-temperature flue - Google Patents
Butterfly valve rod bearing sealing structure of marine high-temperature flue Download PDFInfo
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- CN221034001U CN221034001U CN202322935583.4U CN202322935583U CN221034001U CN 221034001 U CN221034001 U CN 221034001U CN 202322935583 U CN202322935583 U CN 202322935583U CN 221034001 U CN221034001 U CN 221034001U
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- valve rod
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- packing
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- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 238000012856 packing Methods 0.000 claims abstract description 27
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
A marine high temperature flue butterfly valve rod holds seal structure, its characteristics lie in: the device comprises a circular valve body, a circular butterfly plate, a bearing sealing assembly and a connecting assembly; the bearing seal assembly consists of a bearing seal adjusting pad, a disc spring, a packing gasket, a packing pressing sleeve and a packing pressing plate, the connecting assembly consists of a welding bracket, a conversion bracket and a nut in sequence, two ends of a circular valve body and a circular butterfly plate are fixed with two ends of a valve rod through hexagon head hinging bolts, two ends of the valve body and two ends of the valve rod are connected with the conversion bracket and the welding bracket through the nuts, the bearing seal adjusting pad is arranged at the joint of the circular valve body and the circular butterfly plate, and hexagon head hinging bolts, the bearing seal adjusting pad, the disc spring, the packing gasket, the packing pressing sleeve, the packing pressing plate, the nuts, the conversion bracket and the welding bracket are sequentially arranged along the valve rod from inside to outside. The utility model reduces the rotation torque of the valve rod in design, also avoids the phenomenon of blocking caused by the damage of the transmission part due to the long-term high torque action of the transmission part, solves the problem of transverse medium leakage caused by horizontal movement on the valve rod, and simultaneously avoids the problem of shaft end tightness caused by the rotation of the valve rod and the expansion of the high-temperature valve body.
Description
Technical Field
The utility model relates to the field of marine valves, in particular to a butterfly valve rod bearing sealing structure of a marine high-temperature flue.
Background
In the field of marine valves, butterfly valves are one of the most widely used. Particularly, the triple offset butterfly valve is widely used in pipelines with high temperature, large caliber and high sealing requirement. The triple offset butterfly valve has the greatest characteristics that the sealing structure is fundamentally changed, the sealing structure is not position sealing any more, but torsion sealing, and the sealing effect is achieved by completely depending on the contact surface pressure of the valve seat, so that the problem of zero leakage of the metal valve seat is solved at one time. However, the triple offset butterfly valve has the defects that the requirement on machining precision is high, the requirement on size fit clearance is severe, the valve sealing performance is reduced due to the influence of high-temperature deformation and fatigue loss after a certain period of use, the theoretical zero sealing effect is difficult to achieve, and the like.
Therefore, the development of the novel butterfly valve with low processing technology requirements and good sealing effect and high temperature resistance has very important practical significance, the butterfly valve has the functions of adjusting and cutting off sealing, the adjusting process and the cutting off sealing process of the valve are separated, the blocking and interference of the butterfly valve under the high-temperature working condition are avoided, the sealing of the valve is realized, and the service life of the valve is prolonged.
Most of the existing high-temperature triple offset butterfly valves adopt metal sealing structures, and have the advantages of being capable of adapting to working condition environments of high temperature and high pressure, but poor in sealing performance, and capable of causing metal deformation, increasing friction and easily causing clamping conditions in long-term high-temperature working environments. Thereby increasing maintenance cost and reducing work efficiency.
Disclosure of utility model
In order to overcome the defect of sealing of the rod end of the existing marine high-temperature three-eccentric butterfly valve, the utility model provides a sealing structure of a butterfly valve rod bearing of a marine high-temperature flue.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
A marine high temperature flue butterfly valve rod holds seal structure, its characteristics lie in: comprises a circular valve body, a circular butterfly plate, a bearing sealing component and a connecting component,
The bearing seal assembly consists of a bearing seal adjusting pad, a disc spring, a packing gasket, a packing pressing sleeve and a packing pressing plate, the connecting assembly consists of a welding bracket, a conversion bracket and a nut in sequence, the two ends of the circular valve body, the circular butterfly plate and the two ends of a valve rod are fixed through hexagon head hinging bolts, the two ends of the valve body and the two ends of the valve rod are connected with the conversion bracket and the welding bracket through the nuts, the bearing seal adjusting pad is arranged at the joint of the circular valve body and the circular butterfly plate,
The valve rod is sequentially provided with a hexagon head hinged bolt, a bearing sealing adjusting pad, a disc spring, a packing gasket, a packing pressing sleeve, a packing pressing plate, a nut, a conversion support and a welding support from inside to outside, and the disc spring has good rebound resilience.
Compared with the prior art, the utility model has the beneficial effects that
1) The structure of the bearing sealing adjusting pad in the packing assembly is changed, the disc spring is added, the smaller deformation can bear larger load, the axial space is compact, and particularly when the packing assembly is combined, the effects of absorbing impact energy and dissipating energy are more remarkable due to surface friction damping.
2) The sealing structure can be automatically compensated under the condition of high temperature, so that the leakage is reduced.
3) The maintenance is simple, the disassembly is convenient, the service life of the valve is prolonged, and unnecessary shutdown maintenance time and leakage loss are reduced.
In a word, the utility model reduces the rotation torque of the valve rod in design, also avoids the phenomenon of blocking caused by the damage of the transmission part due to the long-term high torque action of the transmission part, solves the problem of transverse medium leakage caused by horizontal movement on the valve rod, and simultaneously avoids the problem of shaft end tightness caused by the rotation of the valve rod and the expansion of the high-temperature valve body.
Description of the drawings:
FIG. 1 is a schematic structural view of a butterfly valve rod bearing seal structure of a marine high temperature flue.
Fig. 2 is an enlarged partial cross-sectional view of the upper end of fig. 1N-N.
Detailed Description
The utility model is further illustrated in the following figures and examples, which should not be taken to limit the scope of the utility model.
Examples
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a butterfly valve stem bearing seal structure of a high temperature flue for a ship according to the present utility model, and fig. 2 is an enlarged partial sectional view of an upper end of fig. 1N-N. The utility model discloses a sealing structure of a butterfly valve rod of a marine high-temperature flue, which comprises a circular valve body 101, a circular butterfly plate 102, a bearing sealing assembly and a connecting assembly, wherein the circular butterfly plate is arranged on the circular valve body:
The bearing seal assembly consists of a bearing seal adjusting pad 9, a disc spring 8, a packing gasket 7, a packing pressing sleeve 6 and a packing pressing plate 5, the connecting assembly consists of a welding bracket 1, a conversion bracket 2 and a nut 3, the circular valve body 101, the circular butterfly plate 102 and two ends of the valve rod 4 are fixed through hexagon head hinging bolts 10, the two ends of the valve body 101 and the valve rod 4 are connected with the conversion bracket 2 and the welding bracket 1 through the nut 3, and the bearing seal adjusting pad 9 is arranged at the joint of the circular valve body 101 and the circular butterfly plate 102;
The valve rod 4 is sequentially provided with a hexagon head hinging bolt 10, a bearing sealing adjusting pad 9, a disc spring 8, a packing gasket 7, a packing pressing sleeve 6, a packing pressing plate 5, a nut 3, a conversion bracket 2 and a welding bracket 1 from inside to outside, wherein the disc spring 8 has good rebound resilience.
The valve rod 4 and the butterfly plate 102 are fixed through a hexagonal head twisting bolt 10 and are matched with a twisting bolt anti-loosening pad 9. The valve has simple structure, is convenient to assemble and disassemble, and is high-temperature and high-pressure resistant. The maintenance cost is reduced, and the working efficiency is increased.
In the high-temperature working condition, the high-temperature medium causes thermal expansion of the valve body 101 and the butterfly plate 102, so that the end seal of the valve rod 4 leaks, and the disc spring 8 generates thrust in a compressed state, so that the sealing structure is automatically compensated, and the gap of the bearing sealing structure is reduced. The disc spring 8 has good shock absorbing capacity, particularly when the laminated combination is adopted, the impact absorbing and energy dissipating effects are more remarkable due to the surface friction resistance effect, static or dynamic loads acting along the axial direction are born at the upper inner edge and the lower outer edge, and the disc spring is compressed and deformed until being flattened, so that the disc spring can store energy as a live load. The automatic conversion to additional compressive load required for sealing is necessary to reduce the continuous need for tightening in gasket, packing use.
The utility model reduces the rotation torque of the valve rod in design, also avoids the phenomenon of blocking caused by the damage of the transmission part due to the long-term high torque action of the transmission part, solves the problem of transverse medium leakage caused by horizontal movement on the valve rod, and simultaneously avoids the problem of shaft end tightness caused by the rotation of the valve rod and the expansion of the high-temperature valve body.
Claims (2)
1. A marine high temperature flue butterfly valve rod holds seal structure, its characterized in that: including circular valve body (101), circle formula butterfly plate (102), bearing seal assembly and coupling assembling:
The bearing sealing assembly consists of a bearing sealing adjusting pad (9), a disc spring (8), a packing gasket (7), a packing pressing sleeve (6) and a packing pressing plate (5), and the connecting assembly consists of a welding bracket (1), a conversion bracket (2) and a nut (3);
The circular valve body (101), the circular butterfly plate (102) and two ends of the valve rod (4) are fixed through hexagon head hinging bolts (10), the two ends of the valve body (101) and the valve rod (4) are connected with the conversion bracket (2) and the welding bracket (1) through nuts (3), and the bearing sealing adjusting pad (9) is arranged at the joint of the circular valve body (101) and the circular butterfly plate (102);
the valve rod (4) is sequentially provided with a hexagon head hinging bolt (10), a bearing sealing adjusting pad (9), a disc spring (8), a packing gasket (7), a packing pressing sleeve (6), a packing pressing plate (5), a nut (3), a conversion bracket (2) and a welding bracket (1) from inside to outside.
2. The marine high temperature flue butterfly valve rod bearing seal structure according to claim 1, wherein the disc spring (8) has high rebound resilience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322935583.4U CN221034001U (en) | 2023-10-31 | 2023-10-31 | Butterfly valve rod bearing sealing structure of marine high-temperature flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322935583.4U CN221034001U (en) | 2023-10-31 | 2023-10-31 | Butterfly valve rod bearing sealing structure of marine high-temperature flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221034001U true CN221034001U (en) | 2024-05-28 |
Family
ID=91167097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322935583.4U Active CN221034001U (en) | 2023-10-31 | 2023-10-31 | Butterfly valve rod bearing sealing structure of marine high-temperature flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221034001U (en) |
-
2023
- 2023-10-31 CN CN202322935583.4U patent/CN221034001U/en active Active
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