CN201554883U - Inside screw non-rising stem type gate valve - Google Patents
Inside screw non-rising stem type gate valve Download PDFInfo
- Publication number
- CN201554883U CN201554883U CN2009202678894U CN200920267889U CN201554883U CN 201554883 U CN201554883 U CN 201554883U CN 2009202678894 U CN2009202678894 U CN 2009202678894U CN 200920267889 U CN200920267889 U CN 200920267889U CN 201554883 U CN201554883 U CN 201554883U
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- valve
- flange
- seal ring
- gland
- flashboard
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Abstract
The utility model relates to an inside screw non-rising stem type gate valve which mainly comprises a handwheel, a gland, an eccentric valve cover, a valve stem, flanges, a gate plate, a soft seal ring, a valve seat, a valve body, a hard seal ring, a bearing and a filler, wherein a fluid inlet and a fluid outlet are arranged in the valve body, the gate plate is arranged between the fluid inlet and the fluid outlet, the upper end of the gate plate is connected with the valve stem through a copper bolt, the handwheel is arranged at the upper end of the valve stem, and the handwheel is fixed at the upper end of the valve stem through a first bolt; the part of the fluid inlet on the left side of the gate plate is provided with the soft seal ring, the part of the fluid outlet on the right side of the gate plate is provided with the hard seal ring, and the valve seat is arranged at one end of the soft seal ring; the middle flange is arranged at the upper end of the valve body, the flange of the valve cover is arranged at the upper end of the middle flange, the eccentric valve cover is arranged at the upper end of the flange of the valve cover, and a middle flange gasket is arranged between the middle flange and the flange of the valve core; the gland is arranged at the upper end of the eccentric valve cover, the filler is arranged at the lower end of the gland, the bearing is arranged at the lower end of the filler; and a rubber seal ring is arranged in the gland, and a gasket is arranged at the joint of the gland and the eccentric valve cover.
Description
Technical field
The utility model relates to a kind of inside screw non-rising stem type gate valve, relates to a kind of valve that uses on water, oil, gas, the corrosive fluid pipeline that is installed in specifically, belongs to valve technology field.
Background technique
Existing inside screw non-rising stem type gate valve mainly is by valve body, valve gap, valve seat, valve rod, flashboard, sealing pair, gland, nut, the handwheel critical piece constitutes, wherein, the critical piece that plays seal action between flashboard and valve seat is a sealing pair, the sealing pair that uses on the existing inside screw non-rising stem type gate valve mainly contains secondary two kinds of hard sealing pair and soft seal, hard sealing pair is the import at the valve seat fluid, outlet port (the contacted sealing surface of flashboard and valve seat) is inlayed with metallic material or built-up welding forms, its sealing surface of hard sealing pair that this use metallic material is made damages easily, the reparation difficulty is big, is not easy to change, maintenance; In addition, the coefficient of thermal expansion and contraction of the hard sealing pair that metallic material is made is bigger, when running into than hot fluid, flashboard and hard sealing pair can expand simultaneously, cause flashboard stuck in valve seat, open difficulty, when running into the lower fluid of temperature, the shrinkage simultaneously of flashboard and hard sealing pair causes producing the gap between flashboard and the valve seat, causes the leakage of fluid easily.
The soft seal pair then is direct coated outside one deck rubber material at flashboard, and seal action is played at the inlet/outlet surface of contact place between flashboard and valve seat.Because the soft seal pair generally is to be made by rubber material, during the flashboard open and close, often move up and down friction, make the rubber layer wear and aging easily, come off, especially when running into the increase of high temperature fluid or manifold pressure, soft seal is secondary can't stand increased pressure owing to holding, and damages easily, thereby causes fluid to reveal.
Because existing inside screw non-rising stem type gate valve volume is big, heaviness, complex structure, cost of production is higher, and installing/dismounting inconvenience is because the connection length of its valve body is oversize, can not exchange general (butterfly valve that is connected as flange-type etc.) with the valve of other type, make its application area be subjected to certain restriction.
The model utility content
The purpose of this utility model is the defective that exists at background technique, design provides a kind of inside screw non-rising stem type gate valve, this inside screw non-rising stem type gate valve volume is little, in light weight, long service life, be convenient to installing/dismounting and maintenance, the driving handwheel of gate valve can be with the keying of valve lifting or change the position, dwindled the volume of gate valve; Because the sealing pair of gate valve is to use two kinds of different materials to make, no matter gate valve is in still low temperature environment use down under the high temperature fluid environment, all can reach the better seal effect, and this gate valve can also exchange general with the flange-type butterfly valve, enlarge the using scope of gate valve, reduced the maintenance expenses and the cost of production of valve.
In order to achieve the above object, the utility model is realized by following technological means:
A kind of inside screw non-rising stem type gate valve, it is made up of handwheel, gland, eccentric valve gap, valve rod, flange, flashboard, soft seal ring, valve seat, valve body, hard seal ring, bearing, filler; It is characterized in that: be provided with fluid inlet and fluid output in the inside of valve body, between fluid inlet and fluid output, be provided with flashboard, upper end at flashboard is connected with valve rod by brass bolt, and the upper end of valve rod is provided with handwheel, handwheel is fixed on the upper end of valve rod by first bolt; Fluid inlet position in the flashboard left side is provided with soft seal ring, is provided with the hard seal ring at the fluid output position on flashboard right side, and an end of soft seal ring is provided with valve seat; Be provided with middle flange in the upper end of valve body, be provided with bonnet flange in middle flange upper end, the bonnet flange upper end is provided with eccentric valve gap, is provided with middle flange gasket between middle flange and the bonnet flange, and middle flange and bonnet flange are connected and fixed by second bolt and the 3rd bolt; The upper end of eccentric valve gap is provided with gland, and the lower end of gland is a filler, and the lower end of filler is provided with bearing; Inside at gland is provided with rubber seal, and gland is provided with pad with the position that is connected of eccentric valve gap.
Described soft seal ring adopts polytetrafluoroethylene PTFE or contraposition polyphenyl material to make.
The inner side surface of described fluid inlet, fluid output is provided with positioning bar, and the both sides of flashboard are provided with locating slot, and positioning bar and locating slot match, and can guarantee the steady keying of flashboard.
Described valve seat is a hard sealing pair of being made by alloy welding deposit or machining, and its wedge surface is a single face, and gradient is 3 degree, and the wedge surface gradient of flashboard is 3 degree.The valve seat of inside screw non-rising stem type gate valve of the present invention is the fixing separated type valve seat of screw thread, can change, and need not grind after changing, because this valve seat is resilient soft sealing face, can does trace to the wedge surface angle defective of flashboard and revise voluntarily.
Described soft seal ring is rich in better elastic, under high temperature or low temperature condition, can not produce the phenomenon of significantly expanding with heat and contract with cold, thereby the situation that the flashboard of having avoided valve pocket inside when the gate valve expanded by heating is stuck, when flashboard is met cold contraction, the soft seal ring of valve pocket inside is because of rich elasticity preferably, remedied micro-variation, can guarantee that sealing is tight, can not leak.
Novel major technique feature and the beneficial effect of the present invention is:
1, little, in light weight, the long service life of this inside screw non-rising stem type gate valve volume, be convenient to installing/dismounting and maintenance, the driving handwheel of gate valve can be with the keying of valve lifting or change the position, dwindled the volume of gate valve.
2, because the sealing pair of gate valve is to use two kinds of different materials to make, no matter gate valve is in still low temperature environment use down under the high temperature fluid environment, all can reach the better seal effect, and this gate valve can also exchange general with the flange-type butterfly valve, enlarge the using scope of gate valve, reduced the maintenance expenses and the cost of production of valve.
Description of drawings
Accompanying drawing is the vertical section structure schematic representation of the utility model inside screw non-rising stem type gate valve.
As shown in the figure, each structure division of above-mentioned inside screw non-rising stem type gate valve is represented by following Arabic numerals:
1. first bolt, 2. handwheel, 3. gland, 4. eccentric valve gap, 5. second bolt, 6. valve rod, 7. flange, 8. flashboard, 9. fluid inlet, 10. flange gasket, 19. bonnet flange, 20. the 3rd bolts, 21. bearings, 22. fillers, 23. rubber seal, 24. pads in the flange, 18. in soft seal ring, 11. valve seats, 12. valve bodies, 13. hard seal rings, 14. fluid outputs, 15. brass bolts, 16. flange screws, 17..
The utility model is described in further detail below in conjunction with embodiment and Figure of description:
Embodiment
Embodiment
As shown in the figure, a kind of inside screw non-rising stem type gate valve, it is made up of handwheel 2, gland 3, eccentric valve gap 4, valve rod 6, flange 7, flashboard 8, soft seal ring 10, valve seat 11, valve body 12, hard seal ring 13, bearing 21, filler 22.
As shown in the figure, be provided with fluid inlet 9 and fluid output 14 in the inside of valve body 12, between fluid inlet 9 and fluid output 14, be provided with flashboard 8, upper end at flashboard 8 is connected with valve rod 6 by brass bolt 15, the upper end of valve rod 6 is provided with handwheel 2, handwheel 2 is fixed on the upper end of valve rod 6 by first bolt 1; Fluid inlet 9 positions in flashboard 8 left sides are provided with soft seal ring 10, are provided with hard seal ring 13 at fluid output 14 positions on flashboard 8 right sides, and an end of soft seal ring 10 is provided with valve seat 11.
As shown in the figure, flange 17 in the upper end of valve body 12 is provided with, be provided with bonnet flange 19 in middle flange 17 upper ends, bonnet flange 19 upper ends are provided with eccentric valve gap 4, flange gasket 18 in being provided with between middle flange 17 and the bonnet flange 19, middle flange 17 is connected and fixed by second bolt 5 and the 3rd bolt 20 with bonnet flange 19; The upper end of eccentric valve gap 4 is provided with gland 3, and the lower end of gland 3 is fillers 22, and the lower end of filler 22 is provided with bearing 21; Be provided with rubber seal 23 in the inside of gland 3, gland 3 is provided with pad 24 with the position that is connected of eccentric valve gap 4.
As shown in the figure, described soft seal ring 10 adopts polytetrafluoroethylene (PTFE) or contraposition polyphenyl material to make.
As shown in the figure, the inner side surface of described fluid inlet 9, fluid output 14 is provided with positioning bar, and the both sides of flashboard 8 are provided with locating slot, and positioning bar and locating slot match, and can guarantee the steady keying of flashboard 8.
As shown in the figure, described valve seat 11 is hard sealing pairs being made by alloy welding deposit or machining, and its wedge surface is a single face, and gradient is 3 degree, and the wedge surface gradient of flashboard 8 is 3 degree.The valve seat 11 of inside screw non-rising stem type gate valve of the present invention is the fixing separated type valve seat of screw thread, can change, and need not grind after changing, because this valve seat is resilient soft sealing face, can does trace to the wedge surface angle defective of flashboard and revise voluntarily.
As shown in the figure, described soft seal ring 10 is rich in better elastic, under high temperature or low temperature condition, can not produce the phenomenon of significantly expanding with heat and contract with cold, thereby the situation that the flashboard 8 of having avoided valve pocket inside when the gate valve expanded by heating is stuck, when flashboard 8 was met cold contraction, the soft seal ring 10 of valve pocket inside had remedied micro-variation because of rich elasticity preferably, can guarantee that sealing is tight, can not leak.
Claims (2)
1. inside screw non-rising stem type gate valve, it is made up of handwheel (2), gland (3), eccentric valve gap (4), valve rod (6), flange (7), flashboard (8), soft seal ring (10), valve seat (11), valve body (12), hard seal ring (13), bearing (21), filler (22); It is characterized in that: be provided with fluid inlet (9) and fluid output (14) in the inside of valve body (12), between fluid inlet (9) and fluid output (14), be provided with flashboard (8), upper end at flashboard (8) is connected with valve rod (6) by brass bolt (15), the upper end of valve rod (6) is provided with handwheel (2), handwheel (2) is fixed on the upper end of valve rod (6) by first bolt (1); Fluid inlet (9) position in flashboard (8) left side is provided with soft seal ring (10), is provided with hard seal ring (13) at fluid output (14) position on flashboard (8) right side, and an end of soft seal ring (10) is provided with valve seat (11); Be provided with middle flange (17) in the upper end of valve body (12), be provided with bonnet flange (19) in middle flange (17) upper end, bonnet flange (19) upper end is provided with eccentric valve gap (4), be provided with middle flange gasket (18) between middle flange (17) and the bonnet flange (19), middle flange (17) is connected and fixed by second bolt (5) and the 3rd bolt (20) with bonnet flange (19); The upper end of eccentric valve gap (4) is provided with gland (3), and the lower end of gland (3) is filler (22), and the lower end of filler (22) is provided with bearing (21); Be provided with rubber seal (23) in the inside of gland (3), gland (3) is provided with pad (24) with the position that is connected of eccentric valve gap (4).
2. a kind of inside screw non-rising stem type gate valve according to claim 1 is characterized in that: described soft seal ring (10) adopts polytetrafluoroethylene PTFE or contraposition polyphenyl material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202678894U CN201554883U (en) | 2009-10-24 | 2009-10-24 | Inside screw non-rising stem type gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202678894U CN201554883U (en) | 2009-10-24 | 2009-10-24 | Inside screw non-rising stem type gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201554883U true CN201554883U (en) | 2010-08-18 |
Family
ID=42614565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202678894U Expired - Fee Related CN201554883U (en) | 2009-10-24 | 2009-10-24 | Inside screw non-rising stem type gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201554883U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423470A (en) * | 2013-08-29 | 2013-12-04 | 南通捷瑞阀门有限公司 | Manual non-rising stem type gate valve and heat treatment process of valve body thereof |
| CN108662181A (en) * | 2018-07-14 | 2018-10-16 | 温州市欧睿阀门有限公司 | A kind of gate valve of installation easy to disassemble |
| CN112392976A (en) * | 2020-10-16 | 2021-02-23 | 温州奇胜阀门制造有限公司 | One-way full-sealing concealed rod type knife gate valve with cover |
| CN116066582A (en) * | 2023-03-07 | 2023-05-05 | 山东宏丰智能装备有限公司 | Automatic pressure relief single valve seat gate valve |
-
2009
- 2009-10-24 CN CN2009202678894U patent/CN201554883U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423470A (en) * | 2013-08-29 | 2013-12-04 | 南通捷瑞阀门有限公司 | Manual non-rising stem type gate valve and heat treatment process of valve body thereof |
| CN108662181A (en) * | 2018-07-14 | 2018-10-16 | 温州市欧睿阀门有限公司 | A kind of gate valve of installation easy to disassemble |
| CN112392976A (en) * | 2020-10-16 | 2021-02-23 | 温州奇胜阀门制造有限公司 | One-way full-sealing concealed rod type knife gate valve with cover |
| CN116066582A (en) * | 2023-03-07 | 2023-05-05 | 山东宏丰智能装备有限公司 | Automatic pressure relief single valve seat gate valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20131024 |