CN106523725A - Cascaded type zero-leakage valve interior assembly - Google Patents
Cascaded type zero-leakage valve interior assembly Download PDFInfo
- Publication number
- CN106523725A CN106523725A CN201611163374.0A CN201611163374A CN106523725A CN 106523725 A CN106523725 A CN 106523725A CN 201611163374 A CN201611163374 A CN 201611163374A CN 106523725 A CN106523725 A CN 106523725A
- Authority
- CN
- China
- Prior art keywords
- valve core
- valve element
- sleeve
- small
- soft
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 238000004146 energy storage Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 3
- 208000032843 Hemorrhage Diseases 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000008733 trauma Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
- F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Details Of Valves (AREA)
Abstract
Disclosed is a cascaded type zero-leakage valve interior assembly. The lower end of a guide sleeve is connected with an upper sleeve in a butting mode. The external diameter of a large valve element is matched with the internal diameter of the upper sleeve. A circumferential groove is formed in the inner side of the lower end of the guide sleeve, and a sealing ring which makes contact with the upper end of the upper sleeve and the large valve element is arranged in the circumferential groove. A valve element cavity is formed below the top wall of the large valve element, a disk spring is arranged in the valve element cavity, and the lower end of the disk spring makes contact with a small valve element. The small valve element is divided by a sealing surface into an upper portion and a lower portion, the upper portion of the small valve element is located in the valve element cavity, a circumferential groove is formed in the side wall of the upper portion of the small valve element, and a sealing ring is arranged in the circumferential groove. The internal diameter of an opening formed in the top end of a lower sleeve is smaller than that of the upper sleeve, a circumferential groove is downwards formed in the top end of the lower sleeve, a soft valve seat is arranged in the groove, the outer ring of the soft valve seat is kept making contact with the lower end of the upper sleeve, and the width of the inner ring of the soft valve seat is larger than the wall thickness of the lower end of the large valve element. According to the cascaded type zero-leakage valve interior assembly, a dual-sealing structure with a protecting function is adopted, a soft seal is closed after a hard sealing surface makes contact with water, and therefore internal leakage of a valve can be effectively avoided, and the scour damage to a soft sealing surface in a short period can be avoided.
Description
Technical field：
The present invention relates to regulating valve technical field, more particularly to a kind of Cascade zero-leakage valve inner assembly.
Background technology：
Current feed pump recirculation regulating valve, using pressure reduction in 25MPa or even under 30MPa pressure reduction, hard sealing surface is easy
Internal hemorrhage due to trauma, but soft seal and not enough resistance to erosion；Along with high pressure saturation water is easiest to produce flash distillation, cavitation damage, therefore at present
Feed pump recirculation regulating valve service life it is very short.
The content of the invention：
In consideration of it, being necessary a kind of Cascade zero-leakage valve inner assembly that can overcome problem above of design.
A kind of Cascade zero-leakage valve inner assembly, including：Big valve core, small valve core, disc spring, fairlead, upper bush, trap
Cylinder, the first spring energy-storage sealing ring, second spring accumulation of energy sealing ring, soft valve seat；Wherein, fairlead lower end is docked with upper bush,
Upper bush lower end is docked with lower sleeve, fairlead, upper bush, lower sleeve three's dead in line, fairlead and upper bush internal diameter phase
Together, big valve core external diameter is matched with upper bush internal diameter, be provided with the inside of fairlead lower end one week be oriented to grooving, be oriented to grooving be provided with
Upper bush upper end and the first spring energy-storage sealing ring of big valve core contact, are connected with valve rod at the top of big valve core, under big valve core roof
It is just spool chamber, disc spring is arranged on the valve element intracavity, and disc spring lower end is contacted with small valve core upper end, and small valve core is with sealing surface as boundary
It is divided into upper and lower two parts, small valve core top is located at the valve element intracavity of big valve core, and small valve core upper portion side wall is provided with one week valve element groove, valve
The second spring accumulation of energy sealing ring for keeping sealing with big valve core, the sealing surface position corresponding with small valve core sealing surface is provided with core groove
At lower sleeve top end opening, the internal diameter at lower sleeve top end opening is less than upper bush internal diameter, is opened on lower sleeve top downwards
There is one week sleeve groove, in sleeve groove, be provided with soft valve seat, the outer ring of soft valve seat keeps and end in contact under upper bush, the inner ring of soft valve seat
More than the wall thickness at big valve core lower end, when closing valve, big valve core lower end closely can keep contacting width with soft valve seat,
So as to improve sealing effectiveness；Upper bush is provided with inlet opening on the side wall at lower end, and big valve core roof is provided with up/down perforation
Balance pipe, is also provided with the balance pipe of up/down perforation at small valve core axis, make medium pass through small valve core balance pipe Jing spool chambers, big valve
Core balance pipe, eventually arrives above big valve core to keep pressure balance；Small valve core bottom and lower sleeve adopt the multistage section of Cascade
Stream design.
Preferably, small valve core bottom is the polyhedral structure for cutting out on the cylinder, along the side of small valve core axial direction
To a flow restriction control face is provided with a certain distance, the cross-sectional area in flow restriction control face is more than before the machining of small valve core bottom
Cross-sectional area 2/3, between adjacent flow restriction control face the cross-sectional area of part be respectively less than flow restriction control face cross-sectional area；Under
Sleeve two ends and inwall have several to the raised ring-type rib structure of lower sleeve axis, and the rib structure is flow conciliation unit, adjacent
Space between its corresponding adjacent flow restriction control face of interference fit between flow conciliation unit forms throttling buffering area.
Using using the double sealing structure with protection, soft seal after hard sealing surface is first contacted is turned off the present invention, on the one hand
The internal hemorrhage due to trauma of valve can be effectively prevented, the erosion damage of soft sealing face short time on the other hand can be prevented；Secondly, by multistage section
Flow structure is designed in the lower section of sealing surface, even if medium has a small amount of flass after sealing surface, is also betided by restriction
Below sealing surface, destruction will not be produced to sealing surface；Additionally, adopting spring energy-storage sealing ring, the bigger sealing property of pressure medium
Better；Valve element adopts balance type structure so that open, closing forces are substantially reduced.
Description of the drawings：
Accompanying drawing 1 is the structural representation of the Cascade zero-leakage valve inner assembly of a width better embodiment.
Accompanying drawing 2 is the structural representation of the upper bush of a width better embodiment.
Accompanying drawing 3 is the structural representation of the big valve core of a width better embodiment.
Accompanying drawing 4 is the structural representation of the lower sleeve of a width better embodiment.
Accompanying drawing 5 is the structural representation of the small valve core of a width better embodiment.
In figure：Big valve core 1, small valve core 2, disc spring 3, fairlead 4, upper bush 5, lower sleeve 6, the first spring energy-storage sealing ring
71st, second spring accumulation of energy sealing ring 72, soft valve seat 73, valve rod 8, spool chamber 11, sealing surface 21, inlet opening 51, balance pipe 12, flat
Weighing apparatus hole 22, flow restriction control face 23, flow conciliation unit 61.
Specific embodiment：
As shown in accompanying drawing 1～5, a kind of Cascade zero-leakage valve inner assembly, including：Big valve core 1, small valve core 2, disc spring 3, lead
To set 4, upper bush 5, lower sleeve 6, the first spring energy-storage sealing ring 71, second spring accumulation of energy sealing ring 72, soft valve seat 73；Its
In, 4 lower end of fairlead is docked with upper bush 5, and 5 lower end of upper bush is docked with lower sleeve 6, fairlead 4, upper bush 5, lower sleeve 6
Three's dead in line, fairlead 4 are identical with 5 internal diameter of upper bush, and 1 external diameter of big valve core is matched with 5 internal diameter of upper bush, under fairlead 4
It is provided with the inside of end one week and is oriented to grooving, is oriented to grooving and is provided with the first spring energy-storage contacted with 5 upper end of upper bush and big valve core 1
Sealing ring 71, is connected with valve rod 8 at the top of big valve core 1, is spool chamber 11 below 1 roof of big valve core, and disc spring sets 3 and puts in the spool chamber
In 11,3 lower end of disc spring is contacted with 2 upper end of small valve core, and small valve core 2 is divided into upper and lower two parts, small valve core 2 by boundary of sealing surface 21
Top is located in the spool chamber 11 of big valve core 1, and 2 upper portion side wall of small valve core is provided with one week valve element groove, is provided with and big valve in valve element groove
Core 1 keeps the second spring accumulation of energy sealing ring 72 of sealing, the sealing surface corresponding with 2 sealing surface 21 of small valve core to be located at lower sleeve 6
At top end opening, the internal diameter at 6 top end opening of lower sleeve is less than 5 internal diameter of upper bush, on 6 top of lower sleeve is provided with downwards one week
Sleeve groove, is provided with soft valve seat 73 in sleeve groove, the outer ring of soft valve seat 73 keeps and 5 times end in contact of upper bush, soft valve seat 73 it is interior
Circle width more than the wall thickness at 1 lower end of big valve core, when closing valve, closely can be protected with soft valve seat 73 by 1 lower end of big valve core
Contact is held, so as to improve sealing effectiveness；Upper bush 5 is provided with inlet opening 51 on the side wall at lower end, 1 roof of big valve core is provided with
The balance pipe 12 of up/down perforation, is also provided with the balance pipe 22 of up/down perforation at 2 axis of small valve core, make medium flat by small valve core 2
Weighing apparatus 22 Jing spool chambers 11 of hole, 1 balance pipe 12 of big valve core, eventually arrive above big valve core 1 to keep pressure balance；Under small valve core 2
Portion and lower sleeve 6 are designed using Cascade multi-level throttle.
In the present embodiment, 2 bottom of small valve core is the polyhedral structure for cutting out on the cylinder, along small valve core
2 axially directions are provided with a flow restriction control face 23 at a certain distance, and the cross-sectional area in flow restriction control face 23 is more than small valve core 2
2/3 of cross-sectional area before the machining of bottom, between adjacent flow restriction control face 23, the cross-sectional area of part respectively less than throttles and adjusts
The cross-sectional area of nodal section 23；6 two ends of lower sleeve and inwall have several to the raised ring-type rib structure of 6 axis of lower sleeve, and the rib is tied
Structure be flow conciliation unit 61, its corresponding adjacent flow restriction control face 23 of the interference fit between adjacent flow conciliation unit 61 it
Between space form throttling buffering area.
Claims (2)
1. a kind of Cascade zero-leakage valve inner assembly, it is characterised in that include：Big valve core, small valve core, disc spring, fairlead, upper set
Cylinder, lower sleeve, the first spring energy-storage sealing ring, second spring accumulation of energy sealing ring, soft valve seat；Wherein, fairlead lower end and upper set
Cylinder docking, upper bush lower end are docked with lower sleeve, fairlead, upper bush, lower sleeve three's dead in line, fairlead and upper bush
Internal diameter is identical, and big valve core external diameter is matched with upper bush internal diameter, is provided with one week and is oriented to grooving, be oriented to grooving on the inside of fairlead lower end
The the first spring energy-storage sealing ring contacted with upper bush upper end and big valve core is provided with, is connected with valve rod at the top of big valve core, big valve core
It is spool chamber below roof, disc spring is arranged on the valve element intracavity, disc spring lower end is contacted with small valve core upper end, small valve core is sealing
Face is divided into upper and lower two parts for boundary, and small valve core top is located at the valve element intracavity of big valve core, and small valve core upper portion side wall is provided with one week valve
Core groove, is provided with the second spring accumulation of energy sealing ring for keeping sealing with big valve core in valve element groove, corresponding with small valve core sealing surface
Sealing surface is located at lower sleeve top end opening, and the internal diameter at lower sleeve top end opening is less than upper bush internal diameter, on lower sleeve top
On be provided with downwards one week sleeve groove, be provided with soft valve seat in sleeve groove, the outer ring of soft valve seat keeps and end in contact under upper bush, soft valve
The inner race width of seat is provided with inlet opening, big valve core more than the wall thickness at big valve core lower end, upper bush on the side wall at lower end
Roof is provided with the balance pipe of up/down perforation, is also provided with the balance pipe of up/down perforation at small valve core axis, small valve core bottom and traps
Cylinder is designed using Cascade multi-level throttle.
2. Cascade zero-leakage valve inner assembly as claimed in claim 1, it is characterised in that small valve core bottom is on the cylinder
The polyhedral structure for cutting out, is provided with a flow restriction control face at a certain distance along small valve core axially direction, throttling
The cross-sectional area in regulation face more than the cross-sectional area before the machining of small valve core bottom 2/3, between adjacent flow restriction control face
The cross-sectional area for dividing is respectively less than the cross-sectional area in flow restriction control face；Lower sleeve two ends and inwall have several raised to lower sleeve axis
Ring-type rib structure, the rib structure is flow conciliation unit, the interference fit between adjacent flow conciliation unit its corresponding phase
Space between adjacent flow restriction control face forms throttling buffering area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163374.0A CN106523725B (en) | 2016-12-15 | 2016-12-15 | Cascade zero-leakage valve inner assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611163374.0A CN106523725B (en) | 2016-12-15 | 2016-12-15 | Cascade zero-leakage valve inner assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106523725A true CN106523725A (en) | 2017-03-22 |
| CN106523725B CN106523725B (en) | 2018-12-28 |
Family
ID=58339930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611163374.0A Active CN106523725B (en) | 2016-12-15 | 2016-12-15 | Cascade zero-leakage valve inner assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523725B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2324344Y (en) * | 1998-03-10 | 1999-06-16 | 王建辉 | High-pressure regulating valve spool |
| JP2002022047A (en) * | 2000-07-11 | 2002-01-23 | Smc Corp | Screw-type electric throttle valve |
| US20040217311A1 (en) * | 2003-04-29 | 2004-11-04 | Taiwan Semiconductor Manufacturing Co., Ltd. | Fully-sealing throttle valve |
| CN202646726U (en) * | 2012-07-11 | 2013-01-02 | 江苏神通阀门股份有限公司 | Axial-flow type multistage decompression anti-cavitation adjusting valve |
| CN103032580A (en) * | 2012-12-27 | 2013-04-10 | 吴忠中创自控阀有限公司 | Multi-stage throttling regulation valve |
| CN204226668U (en) * | 2014-11-06 | 2015-03-25 | 艾坦姆流体控制技术（北京）有限公司 | Modulating valve |
| CN104455469A (en) * | 2014-09-29 | 2015-03-25 | 北京航天动力研究所 | Throttling serial type multistage pressure reduction and adjustment valve |
-
2016
- 2016-12-15 CN CN201611163374.0A patent/CN106523725B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2324344Y (en) * | 1998-03-10 | 1999-06-16 | 王建辉 | High-pressure regulating valve spool |
| JP2002022047A (en) * | 2000-07-11 | 2002-01-23 | Smc Corp | Screw-type electric throttle valve |
| US20040217311A1 (en) * | 2003-04-29 | 2004-11-04 | Taiwan Semiconductor Manufacturing Co., Ltd. | Fully-sealing throttle valve |
| CN202646726U (en) * | 2012-07-11 | 2013-01-02 | 江苏神通阀门股份有限公司 | Axial-flow type multistage decompression anti-cavitation adjusting valve |
| CN103032580A (en) * | 2012-12-27 | 2013-04-10 | 吴忠中创自控阀有限公司 | Multi-stage throttling regulation valve |
| CN104455469A (en) * | 2014-09-29 | 2015-03-25 | 北京航天动力研究所 | Throttling serial type multistage pressure reduction and adjustment valve |
| CN204226668U (en) * | 2014-11-06 | 2015-03-25 | 艾坦姆流体控制技术（北京）有限公司 | Modulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106523725B (en) | 2018-12-28 |
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