CN203023511U - High-pressure and high-pressure-difference balanced valve - Google Patents
High-pressure and high-pressure-difference balanced valve Download PDFInfo
- Publication number
- CN203023511U CN203023511U CN 201320029037 CN201320029037U CN203023511U CN 203023511 U CN203023511 U CN 203023511U CN 201320029037 CN201320029037 CN 201320029037 CN 201320029037 U CN201320029037 U CN 201320029037U CN 203023511 U CN203023511 U CN 203023511U
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- valve
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- lining
- balanced
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Abstract
The utility model discloses a high-pressure and high-pressure-difference balanced valve which is characterized in that a valve seat is provided with a piston; the piston is externally provided with a bushing; the middle part of the bushing is provided with a flow rate regulating hole; a valve seal pair is formed at the contact surface of the valve seat and the piston; a medium flow channel is formed between the piston and the bushing; the flow rate regulating hole is formed in the upper ends of the valve seal pair and the medium flow channel; the piston, the bushing, the valve cover and the valve rod form a balanced cavity; the piston is internally provided with a balanced hole which runs through the balanced cavity; the middle part of the piston and the lower part of the bushing throttling hole are matched so as to form a protection layer; the length of the protection layer is longer than the matched length of the lower end of the bushing and the lower end of the piston; the step end surface at the middle part of the piston and the regulating flow rate hole form a throttling mechanism; the seal of the valve is separated from the throttling part, the seal surface is not flushed by media; the seal performance is good; the service life is long; and the high-pressure and high-pressure-difference balanced valve is suitable for pipelines for conveying high-pressure media in fields of petroleum, chemical engineering and the like and is used for stopping and regulating the flow rate. The high-pressure and high-pressure-difference balanced valve is especially suitable for the working conditions of regulating the flow rate through high pressure and high pressure difference.
Description
Technical field
The utility model provides a kind of industry conveying high-pressure medium pipeline valves such as oil, chemical industry, especially a kind of high-differential-pressure regulating valve of being applicable to.
Background technique
At present, domestic stop valve, adjust flux valve generally are comprised of major parts such as valve body, valve gap, valve rod, valve seat, flaps, and its seal form has plane, the conical surface etc.Its disadvantage is that valve seal and adjust flux position are that realize at same position, and the sealing surface close contact during throttle down on valve seat and flap is realized sealing.During the valve opening adjust flux, high-pressure medium flows out at valve seat and two sealing surface gaps of flap, realizes the adjusting of flow.The direct erosion sealing surface of high-pressure medium, sealing surface very easily damages, and causes the valve seal performance failure.Particularly shorter in the situation lower valve life-span of High Pressure Difference adjust flux.The 2nd, most valve does not have the design pressure balanced controls, and opening/shutting valve will overcome high-pressure medium to the thrust of flap, and valve switch is very difficult.
Summary of the invention
The purpose of this utility model is to overcome that in prior art, valve seal and adjust flux position is that realize at same position, the direct erosion sealing surface of high-pressure medium when adjust flux, sealing surface very easily damages, the valve seal poor performance, the deficiency that working life is short, valve switch is very difficult provides a kind of high pressure, High Pressure Difference, balanced-type valve.
the technological scheme that the utility model technical solution problem adopts is: the utility model is by handle, valve rod, Stem Mut, valve body, valve gap, valve seat, piston, lining forms, piston is housed on valve seat, piston is equipped with lining outward, the middle part of lining is provided with the adjust flux hole, it is secondary that valve seat and piston surface of contact form valve seal, be provided with the media flow passage between piston and lining, the adjust flux hole is arranged on the valve seal pair, the upper end of media flow passage, piston, lining, valve gap, valve rod forms counter balance pocket, be provided with equalizing orifice in piston, equalizing orifice and counter balance pocket connect.
Piston middle part coordinates formation one segment protect layer with lining throttle orifice bottom, and the length of protective layer is greater than lining lower end and piston lower end length of thread engagement.
Piston middle bench end face and adjust flux hole formation throttle mechanism.
The utility model has the advantages that: valve mechanism is simple, switch is flexible, good seal performance, long service life, is specially adapted to the operating mode of high pressure, High Pressure Difference adjust flux.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Accompanying drawing is the utility model embodiment's main sectional view.
1 valve rod in figure, 2 Stem Muts, 3 handles, 4 seal rings, 5 valve gaps, 6 seal rings, 7 pistons, 8 seal rings, 9 linings, 10 valve bodies, 11 valve seats, A counter balance pocket, B equalizing orifice, C adjust flux hole, D sealing pair, E protective layer, F media flow passage.
Embodiment
In the accompanying drawings, a kind of high pressure, High Pressure Difference, balanced-type valve are by being comprised of handle (3), valve rod (1), Stem Mut (2), valve body (10), valve gap (5), valve seat (11), piston (7), lining (9).Piston (7) is housed on valve seat (11), piston is equipped with lining (9) outward, the middle part of lining is provided with adjust flux hole (C), valve seat and piston surface of contact form valve seal secondary (D), be provided with media flow passage (F) between piston and lining, adjust flux hole (C) is arranged on the upper end of valve seal pair (D), media flow passage (F), piston, lining, valve gap, valve rod form counter balance pocket (A), be provided with equalizing orifice (B) in piston, equalizing orifice (B) connects with counter balance pocket (A).Piston (7) middle part coordinates formation one segment protect layer (E) with lining throttle orifice (C) bottom, and the length of protective layer (E) is greater than lining lower end and piston lower end length of thread engagement.Piston middle bench end face and adjust flux hole (C) form throttle mechanism.
The sealing mechanism of a kind of high pressure, High Pressure Difference, balanced-type valve is the valve seal secondary (D) that valve seat and piston surface of contact form, and the secondary close contact of valve seal is realized sealing when valve closing.If plunger designs becomes the upper end bearing area greater than the bearing area of lower end sealing pair (D), the pressure between sealing pair can increase, and sealing effect is better.
The adjust flux mechanism of a kind of high pressure, High Pressure Difference, balanced-type valve is by the adjust flux hole (C) on lining, the protective layer (E) at piston and lining middle part, and the media flow passage (F) between piston and lining, piston (7) forms.When valve is opened a little; piston (7) moves up; the gap of valve seal secondary (D) begins to increase; medium is by the valve inlet end sealing pair (D) of flowing through; arrive media flow passage (F); protective layer this moment (E) is not also opened, and valve flow is the clearance flow of protective layer (E), not erosion of medium sealing surface.Valve continues to open; the gap of sealing pair (D) continues to increase; the size of protective layer (E) reduces continuing; when continuing Open valve, piston (7) middle bench face arrives the adjust flux hole (C) on lining, and namely protective layer (E) is not when existing; valve begins adjust flux; medium arrives media flow passage (F) by the valve inlet end valve seal pair (D) of flowing through, through adjust flux hole (C) output valve body.At this moment; the unlatching sectional area of the sealing pair of valve (D) is greater than the sectional area of adjust flux (C) hole unlatching; a medium erosion adjust flux hole (C) and piston (7) way station terrace; it is adjust flux mechanism; the sealing pair of valve (D) is not subjected to the medium erosion, and sealing surface is protected.Medium is in the process of adjust flux hole (C) output valve body; medium is by sealing pair (D), media flow passage (F), protective layer (E), adjust flux (C) time; through the variation that direction changes and cross section of fluid channel is long-pending repeatedly; pressure medium descends; the vaporization phenomenon of medium reduces, and has avoided sealing pair and adjust flux mechanism place that the phenomenon of cavitation erosion occurs.
A kind of high pressure, High Pressure Difference, balanced-type valve pressure balance mechanism are comprised of the equalizing orifice (B) on piston (7), lining (9), valve gap (5), valve rod (1), seal ring (6), seal ring (4), piston.When MEDIA FLOW during in valve inlet, medium arrives counter balance pocket (A) by the equalizing orifice (B) on piston (7), two ends, piston (7) up and down are subjected to the pressure of medium substantially equal, and the open and close valve only overcomes resistance and gets final product, and opening/shutting valve is very laborsaving.
Working principle of the present utility model is: rotate counterclockwise handle (3), Stem Mut (2) rotates, and band ovable valve stem (1), piston (7) move up, the valve opening adjust flux.Clockwise rotate handle (3), Stem Mut (2) rotates, and band ovable valve stem (1), piston (7) move down, and valve begins to close and can carry out adjust flux.
Claims (3)
1. high pressure, High Pressure Difference, balanced-type valve, by handle (3), valve rod (1), Stem Mut (2), valve body (10), valve gap (5), valve seat (11), piston (7), lining (9) forms, it is characterized in that: piston (7) is housed on valve seat (11), piston is equipped with lining (9) outward, the middle part of lining is provided with adjust flux hole (C), valve seat and piston surface of contact form valve seal secondary (D), be provided with media flow passage (F) between piston and lining, adjust flux hole (C) is arranged on valve seal pair (D), the upper end of media flow passage (F), piston, lining, valve gap, valve rod forms counter balance pocket (A), be provided with equalizing orifice (B) in piston, equalizing orifice (B) connects with counter balance pocket (A).
2. high pressure according to claim 1, High Pressure Difference, balanced-type valve; it is characterized in that: piston (7) middle part coordinates formation one segment protect layer (E) with lining throttle orifice (C) bottom, and the length of protective layer (E) is greater than lining lower end and piston lower end length of thread engagement.
3. high pressure according to claim 1 and 2, High Pressure Difference, balanced-type valve, is characterized in that: piston middle bench end face and adjust flux hole (C) formation throttle mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029037 CN203023511U (en) | 2013-01-11 | 2013-01-11 | High-pressure and high-pressure-difference balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029037 CN203023511U (en) | 2013-01-11 | 2013-01-11 | High-pressure and high-pressure-difference balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203023511U true CN203023511U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029037 Expired - Fee Related CN203023511U (en) | 2013-01-11 | 2013-01-11 | High-pressure and high-pressure-difference balanced valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203023511U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653797A (en) * | 2015-02-12 | 2015-05-27 | 宣达实业集团有限公司 | High-pressure self-balancing and self-sealing piston type throttle regulation stop valve |
| CN105090534A (en) * | 2014-04-30 | 2015-11-25 | 浙江三花股份有限公司 | Direct-acting electric valve |
| CN108825867A (en) * | 2018-09-10 | 2018-11-16 | 四川滨大阀门有限责任公司 | A kind of High Pressure Difference sleeve adjusting valve |
-
2013
- 2013-01-11 CN CN 201320029037 patent/CN203023511U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090534A (en) * | 2014-04-30 | 2015-11-25 | 浙江三花股份有限公司 | Direct-acting electric valve |
| CN104653797A (en) * | 2015-02-12 | 2015-05-27 | 宣达实业集团有限公司 | High-pressure self-balancing and self-sealing piston type throttle regulation stop valve |
| CN108825867A (en) * | 2018-09-10 | 2018-11-16 | 四川滨大阀门有限责任公司 | A kind of High Pressure Difference sleeve adjusting valve |
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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 |
Granted publication date: 20130626 Termination date: 20160111 |