CN202381719U - Straight-flow high-pressure stop valve - Google Patents
Straight-flow high-pressure stop valve Download PDFInfo
- Publication number
- CN202381719U CN202381719U CN2011204258207U CN201120425820U CN202381719U CN 202381719 U CN202381719 U CN 202381719U CN 2011204258207 U CN2011204258207 U CN 2011204258207U CN 201120425820 U CN201120425820 U CN 201120425820U CN 202381719 U CN202381719 U CN 202381719U
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- flap
- pressure stop
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a straight-flow high-pressure stop valve, which comprises a doubling ring, a valve stem nut, a support, a packing pressure plate, a packing box, a valve clack, a valve body, an upper valve stem and a lower valve stem. A sealing ring and a sealing compression ring are disposed on the outside of the packing box, the sealing compression ring is positioned above the sealing ring, the upper valve stem is connected with the lower valve stem by a valve stem connector, the lower valve stem and the valve clack are integrally connected, an upper sealing surface with a cone angle is disposed on the upper surface of the valve clack, and a lower sealing surface with a cone angle is arranged on the lower surface of the valve clack. By the aid of a sealing structure, packing in the packing box is sufficiently protected against carrying pressure for a long period when the valve is opened, and is effectively protected, and the service life of the packing is prolonged. In addition, the sealing compression ring and the sealing ring on the lower portion of threads of the lower end of the support can generate sealing force under the effect of the pressure of the valve, and a channel for leaking media to the outside of the valve body via a middle cavity of the valve body is blocked. Besides, the generated sealing force is increased along with increase of the pressure, and a self-tightening sealing effect is realized.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of direct current type high-pressure stop valve.
Background technique
In fields such as oil, chemical industry; As the conveying of system's mesohigh medium with close the use valve; Its structure has and is easy to its common high-pressure stop valve, have characteristics such as safe and reliable, long service life, but the Stuffing box of existing stop valve usually stands long-term pressure effect; Make and the lost of life cause leakage.
The model utility content
To above-mentioned existing technology, the technical problem that the utility model will solve provides a kind of high temperature, high pressure that can bear system media, and can guarantee the long period direct current type high-pressure stop valve in working life.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of direct current type high-pressure stop valve; Comprise also wire ring, Stem Mut, support, hold-down grid, Stuffing box, flap, valve body, upper valve rod, lower valve rod; It is characterized in that: said Stuffing box outer shroud is provided with the inclined-plane of evagination, and the place, inclined-plane is provided with seal ring and seal joint, and seal joint is positioned at the seal ring top; Said upper valve rod links to each other with lower valve rod through the valve rod connector; Said lower valve rod is connected with the flap one, and the upper surface of flap is made as the last sealing surface of band conical surface angle, and lower surface is made as the lower sealing surface of band conical surface angle.
Further, the outside of said flap is provided with hard alloy layer.
Further, the bevel angle of the outer installment of said Stuffing box is 45 °.
Further, the said conical surface angle that goes up sealing surface and lower sealing surface is made as 60 ° or 90 °.
Further, valve body is formed by shaped steel or steel billet fine finishing after forging.
Further, said Stem Mut, support, Stuffing box, flap form for section bar fine finishing.
Further, said seal ring is to be formed by the Expanded graphite compacting, and seal joint is formed by section bar fine finishing.
Through last sealing configuration, the valve filler in the Stuffing box under opening state that adequately protects does not bear macrocyclic pressure effect, protects filler effectively, thereby increases the working life of filler.The seal joint and the seal ring structure of screw thread bottom, support lower end can produce a sealing force under the valve pressure effect, the blocking-up medium is leaked to the outside passage of valve body through the valve body lumen.The high more sealing force that produces of pressure is big more, realizes self-tightening sealing.
Compared with prior art, the utlity model has following beneficial effect: 1. adopt self-tightening sealing, sealing thoroughly stops to leak in the increase.2. good seal performance, taper is fully hard matter sealing surface guarantees excellent sealability and long working life.3. the housing pressure part is all strict guarantees the material zero defect through nondestructive flaw detection examination, thereby guarantees security of products.4. adopt connector to connect lower valve rod and flap that upper valve rod is connected with one, realized reducing the wearing and tearing of flap upper valve rod section and filler.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the last sealing surface and the lower sealing surface structural representation of the utility model flap.
Embodiment
To combine accompanying drawing and embodiment that the utility model is done further to describe below.
Referring to Fig. 1, Fig. 2, a kind of direct current type high-pressure stop valve comprises valve body 10, support 3 and is arranged on Stem Mut 2 and the upper valve rod 12 on the support; Said support 3 middle parts are porose, two ends have screw thread and valve body 10 with and wire ring 1 link to each other, Stem Mut 2 by and wire ring 1 fix its axial position; Top also links to each other with Stem Mut 2, and Stuffing box 6 is equipped with in support 3 bottoms, 45 ° of inclined-planes of Stuffing box 6 outer installment evaginations; Be connected with seal ring 8 and seal joint 7 through the inclined-plane, Stuffing box 6 middle parts are provided with filler, compress through filler gland 11 and hold-down grid 5; Be connected with on the flap 9 lower valve rod then the lower valve rod section be connected with upper valve rod 12 through valve rod connector 4; Flap 9 is provided with cemented carbide, and is provided with lower sealing surface 14 and last sealing surface 13 two seals faces, and two sealing surface conical surface angles are made as 60 ° or 90 °.
The working principle of the utility model: valve rotates counterclockwise handwheel in use, and upper valve rod 12 rises, and drives flap 9 and moves.Flap moves up, Open valve; When sealing surface 13 on the flap 9 with after sealing surface on the Stuffing box 6 contacts, last hermetically closing, medium can not get in the stuffing box of Stuffing box.When clockwise rotating, upper valve rod 12 descends, and drives flap 9 and moves, and flap 9 moves down, and when the lower sealing surface 14 of flap 9 contacts with sealing surface on the valve body 10, valve closing blocks ducted flowing medium.
As preferably, said support 3, Stem Mut 2, upper valve rod 12 and wire ring 1 are to be formed through fine finishing by shaped steel,
Stuffing box 6 is to be formed by section bar fine finishing; Be processed with sealing surface above, seal ring 8 is to be formed by the Expanded graphite compacting, and seal joint 7 is to be formed by section bar fine finishing; Filler gland 11 is formed by section bar fine finishing; Hold-down grid 5 is formed by section bar fine finishing, and flap 9 is to be formed by shaped steel fine finishing, is welded with cemented carbide.
When clockwise rotating, flap 9 moves down, flap 9 conical surfaces contact valve body sealing surface; Throttle down, when rotating counterclockwise handwheel, the flap 9 flap conical surface that moves up leaves valve body sealing surface; Valve opening; Flap 9 continues to move up, sealing surface on the last sealing surface 13 contact Stuffing boxes of flap 9, last hermetically closing.
Claims (7)
1. direct current type high-pressure stop valve; Comprise also wire ring (1), Stem Mut (2), support (3), hold-down grid (5), Stuffing box (6), flap (9), valve body (10), upper valve rod (12), lower valve rod; It is characterized in that: said Stuffing box (6) outer shroud is provided with the inclined-plane of evagination; The place, inclined-plane is provided with seal ring (8) and seal joint (7); Seal joint (7) is positioned at seal ring (8) top, and said upper valve rod (12) links to each other with lower valve rod through valve rod connector (4), and said lower valve rod is connected with flap (9) one; The upper surface of flap (9) is made as the last sealing surface of band conical surface angle, and lower surface is made as the lower sealing surface of band conical surface angle.
2. direct current type high-pressure stop valve according to claim 1 is characterized in that: the outside of said flap (9) is provided with hard alloy layer.
3. direct current type high-pressure stop valve according to claim 1 is characterized in that: the bevel angle of the outer installment of said Stuffing box (6) is 45 °.
4. according to claim 1 or 2 or 3 described direct current type high-pressure stop valves, it is characterized in that: the said conical surface angle that goes up sealing surface and lower sealing surface is made as 60 ° or 90 °.
5. according to claim 1 or 2 or 3 described direct current type high-pressure stop valves, it is characterized in that: valve body (10) is to be formed by shaped steel or steel billet fine finishing after forging.
6. according to claim 1 or 2 or 3 described direct current type high-pressure stop valves, it is characterized in that: said Stem Mut (2), support (3), Stuffing box (6), flap (9) form for section bar fine finishing.
7. according to claim 1 or 2 or 3 described direct current type high-pressure stop valves, it is characterized in that: said seal ring (8) is to be formed by the Expanded graphite compacting, and seal joint (7) is formed by section bar fine finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204258207U CN202381719U (en) | 2011-11-01 | 2011-11-01 | Straight-flow high-pressure stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204258207U CN202381719U (en) | 2011-11-01 | 2011-11-01 | Straight-flow high-pressure stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381719U true CN202381719U (en) | 2012-08-15 |
Family
ID=46630223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204258207U Expired - Fee Related CN202381719U (en) | 2011-11-01 | 2011-11-01 | Straight-flow high-pressure stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381719U (en) |
-
2011
- 2011-11-01 CN CN2011204258207U patent/CN202381719U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20161101 |