CN212377323U - High-temperature zero-leakage all-metal welding butterfly valve - Google Patents
High-temperature zero-leakage all-metal welding butterfly valve Download PDFInfo
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- CN212377323U CN212377323U CN202021064247.7U CN202021064247U CN212377323U CN 212377323 U CN212377323 U CN 212377323U CN 202021064247 U CN202021064247 U CN 202021064247U CN 212377323 U CN212377323 U CN 212377323U
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Abstract
The utility model relates to a high-temperature zero-leakage all-metal welded butterfly valve, which comprises a valve body, a valve seat, a butterfly plate, a valve rod and a transmission mechanism, wherein a valve body channel is connected by welding, and a metal sealing structure is adopted between the valve seat and the butterfly plate; the method is characterized in that: the middle cavity between the valve rod and the valve body is sealed by adopting a composite sealing device, the composite sealing device consists of graphite filler and a grease sealing ring, the graphite filler consists of an upper graphite ring and a lower graphite ring, the grease sealing ring is arranged between the upper graphite ring and the lower graphite ring, and a check valve is arranged between an oil filling cavity of the grease sealing ring and an oil filling port on the valve body. The cavity sealing adopts a composite sealing device consisting of graphite packing and a grease sealing ring, so that the sealing performance of the middle cavity is improved, and zero leakage of the middle cavity is realized; the valve body channel adopts welded connection, and leakage points generated by flange connection are eliminated. The sealing device has the characteristics of good sealing performance, zero leakage and the like, and safety accidents caused by leakage of dangerous media are eliminated.
Description
Technical Field
The utility model belongs to the valve field especially relates to a high temperature resistant butterfly valve. The utility model discloses dangerous medium operating mode of ultra-temperature.
Background
The structure of the high-temperature butterfly valve generally comprises a valve body, a valve seat, a butterfly plate, a valve rod and a transmission mechanism, wherein the transmission mechanism drives the valve rod to rotate for 90 degrees in a shaft hole of the valve body, so that the opening and closing operation between the butterfly plate and the valve seat is realized, and a sealing surface of the butterfly plate and a sealing surface of the valve seat are mutually matched by a metal sealing surface. However, in the existing high-temperature metal sealing butterfly valve, the middle cavity of the valve body generally needs to be sealed by graphite packing, the graphite packing is easily worn by the rotation of the valve rod under the high-temperature working condition, the middle cavity leaks, the sealing performance is poor, and the dangerous medium leaks to cause safety accidents.
Disclosure of Invention
The utility model discloses shortcoming to prior art exists provides a sealing performance is good, the zero all-metal welding butterfly valve that leaks of high temperature that does not have the external leakage.
The technical scheme of the utility model comprises a valve body, a valve seat, a butterfly plate, a valve rod and a transmission mechanism, wherein the valve body channel is connected by welding, and a metal sealing structure is adopted between the valve seat and the butterfly plate; the method is characterized in that: the middle cavity between the valve rod and the valve body is sealed by adopting a composite sealing device, the composite sealing device consists of graphite filler and a grease sealing ring, the graphite filler consists of an upper graphite ring and a lower graphite ring, the grease sealing ring is arranged between the upper graphite ring and the lower graphite ring, and a check valve is arranged between an oil filling cavity of the grease sealing ring and an oil filling port on the valve body.
Preferably, a split ring is arranged in an annular groove on the outer circumferential surface of the lower end of the valve rod, and the lower annular surface of the split ring is pressed on an annular table surface on the upper end of the tail cover.
Preferably, the lower part of the composite sealing device is provided with a heat insulation ring which is arranged between the lower graphite ring and the bottom surface of the sealing cavity.
Compared with the prior art, the utility model beneficial effect be: the middle cavity is sealed by adopting a composite sealing device consisting of graphite packing and a grease sealing ring, so that the sealing performance of the middle cavity is improved, and zero leakage of the middle cavity is realized; the valve body channel adopts welded connection, and leakage points generated by flange connection are eliminated. The sealing device has the characteristics of good sealing performance, zero leakage and the like, and safety accidents caused by leakage of dangerous media are eliminated.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The valve comprises a tail cover 1, a screw 2, a sealing gasket 3, a split ring 4, a valve body 5, a butterfly plate 6, a pressing plate 7, a locking tooth gasket 8, a hexagon socket head cap screw 9, a sealing ring 10, a valve seat 11, a valve seat sealing surface 12, a gasket 13, a temperature-isolating ring 14, graphite packing 15, a grease sealing ring 16, a gland 17, a support 18, a cylindrical pin 19, a valve rod 20, a shaft sleeve 21 and a transmission mechanism 22.
Detailed Description
The high-temperature zero-leakage all-metal welded butterfly valve shown in fig. 1 comprises a valve body 5, a valve seat 11, a butterfly plate 6, a valve rod 20 and a transmission mechanism 22, wherein a channel of the valve body 5 is connected in a welding manner, a metal sealing structure is adopted between the valve seat 11 and the butterfly plate 6, the metal sealing structure is formed by mutually matching a sealing ring 10 arranged on the butterfly plate 6 and a valve seat sealing surface 12 welded on the valve seat 11 in a surfacing manner, the sealing ring 10 is fixedly arranged on the butterfly plate 6 through a pressure plate 7 and an inner hexagon bolt 9, and an anti-loosening tooth pad 8 is arranged between the pressure plate 7 and the inner hexagon bolt 9 to prevent the inner hexagon; the method is characterized in that: the middle cavity between the valve rod 20 and the valve body 5 is sealed by adopting a composite sealing device, the composite sealing device consists of a graphite filler 15 and a grease sealing ring 16, the graphite filler 15 consists of an upper graphite ring and a lower graphite ring, the grease sealing ring 16 is arranged between the upper graphite ring and the lower graphite ring, a one-way valve is arranged between an oil injection cavity of the grease sealing ring 16 and an oil injection port on the valve body 5, when oil is injected, high-temperature-resistant grease enters from the oil injection port on the valve body 5, the one-way valve is opened and is injected into the oil injection cavity of the grease sealing ring 16, and grease sealing is formed between the outer circular surface of the valve rod 20 and the valve body 5, so that the sealing performance of the middle; meanwhile, the lubricating function is realized between the valve rod 20 and the graphite packing 15, the abrasion of the graphite packing 15 is reduced, and the opening and closing torque is reduced.
A split ring 4 is arranged in an annular groove on the outer circular surface of the lower end of a valve rod 20, the lower annular surface of the split ring 4 is pressed on an annular table surface at the upper end of a tail cover 1, a sealing gasket 3 is arranged between the tail cover 1 and a valve body 5, and the tail cover 1 is fixedly arranged on the valve body 5 through a screw 2.
The lower part of the composite sealing device is provided with a heat insulation ring 14 for reducing the upward conduction of the medium temperature, the heat insulation ring 14 is arranged between the lower graphite ring and the bottom surface of a sealing cavity, the sealing cavity is a cavity for installing the composite sealing device between the outer circular surface of the valve rod 20 and the valve body 5, and a gasket 13 is arranged between the heat insulation ring 14 and the bottom surface of the sealing cavity.
The butterfly plate 6 is fixedly arranged on a valve rod 20 through a cylindrical pin 19, a shaft sleeve 21 is arranged in a shaft hole between the valve rod 20 and the valve body 5 on the lower side of the sealing cavity, the composite sealing device is arranged in the sealing cavity through a gland 17 in a pressing mode, and a transmission mechanism 22 is arranged on the valve body 5 through a support 18.
Claims (3)
1. A high-temperature zero-leakage all-metal welded butterfly valve comprises a valve body (5), a valve seat (11), a butterfly plate (6), a valve rod (20) and a transmission mechanism (22), wherein a channel of the valve body (5) is connected in a welding manner, and a metal sealing structure is adopted between the valve seat (11) and the butterfly plate (6); the method is characterized in that: the middle cavity between the valve rod (20) and the valve body (5) is sealed by adopting a composite sealing device, the composite sealing device is composed of graphite packing (15) and a grease sealing ring (16), the graphite packing (15) is composed of an upper graphite ring and a lower graphite ring, the grease sealing ring (16) is installed between the upper graphite ring and the lower graphite ring, and a one-way valve is installed between an oil injection cavity of the grease sealing ring (16) and an oil injection port on the valve body (5).
2. The high temperature zero leakage all-metal welded butterfly valve of claim 1, further comprising: a split ring (4) is arranged in an annular groove on the outer circular surface of the lower end of the valve rod (20), and the lower annular surface of the split ring (4) is pressed on an annular table surface at the upper end of the tail cover (1).
3. The high temperature zero leakage all-metal welded butterfly valve of claim 1 or 2, wherein: and a heat insulation ring (14) is arranged at the lower part of the composite sealing device, and the heat insulation ring (14) is arranged between the lower graphite ring and the bottom surface of the sealing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021064247.7U CN212377323U (en) | 2020-06-11 | 2020-06-11 | High-temperature zero-leakage all-metal welding butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021064247.7U CN212377323U (en) | 2020-06-11 | 2020-06-11 | High-temperature zero-leakage all-metal welding butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212377323U true CN212377323U (en) | 2021-01-19 |
Family
ID=74162236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021064247.7U Active CN212377323U (en) | 2020-06-11 | 2020-06-11 | High-temperature zero-leakage all-metal welding butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212377323U (en) |
-
2020
- 2020-06-11 CN CN202021064247.7U patent/CN212377323U/en active Active
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