CN211779046U - Ultralow-temperature low-leakage high-pressure balanced type regulating valve - Google Patents
Ultralow-temperature low-leakage high-pressure balanced type regulating valve Download PDFInfo
- Publication number
- CN211779046U CN211779046U CN202020357098.7U CN202020357098U CN211779046U CN 211779046 U CN211779046 U CN 211779046U CN 202020357098 U CN202020357098 U CN 202020357098U CN 211779046 U CN211779046 U CN 211779046U
- Authority
- CN
- China
- Prior art keywords
- wedge
- valve
- shaped
- pctfe
- valve rod
- 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.)
- Active
Links
Images
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model relates to an ultra-low temperature low leakage high pressure balance type regulating valve, which comprises a flange type upper sleeve, a lower sleeve and a valve core; the valve core is fixedly connected with one end of the valve rod, and the other end of the valve rod penetrates through the upper valve cover to be connected with the actuating mechanism; an annular groove is formed in the upper end face of the lower sleeve, and a guide wedge-shaped retaining ring and a disc spring group are placed in the annular groove; a PCTFE wedge-shaped sealing element is sleeved on the outer wall of the valve core, a wedge-shaped surface of the outer side surface of the PCTFE wedge-shaped sealing element is abutted against a wedge-shaped surface of the guide wedge-shaped retaining ring, and the inner side surface of the PCTFE wedge-shaped sealing element is attached to and sealed with the outer wall of the valve core; through set up PCTFE wedge sealing member outside the case, keep off the ascending holding power of direction wedge fender with dish spring group and trun into the power that PCTFE wedge sealing member level laminated the case to through the wedge face for the case is laminated sealed with PCTFE wedge sealing member all the time at the lift in-process, has solved the big problem of leakage of balanced sealing washer under the ultra-low temperature environment.
Description
Technical Field
The utility model relates to a valve body specifically is an ultra-low temperature low leakage high pressure balanced type governing valve.
Background
Along with the continuous expansion of China's LNG and air separation plant market, the demand for low-temperature valves is more and more, and the requirement for low-temperature valve pressure grade is also higher, and the big problem of interior hourglass, outer hourglass that follow the traditional low temperature high pressure governing valve exists is also more obvious, awaits the solution urgently. Most of domestic low-temperature and high-pressure valves are imported, and in the field of domestic low-temperature industrial automation control, the sealing performance and reliability of the traditional single low-temperature balance sealing ring are limited, so that the requirements of users on ultralow temperature, low leakage and high pressure difference are difficult to meet, and the ubiquitous phenomenon greatly restricts the research and development of domestic ultralow-temperature and high-pressure valves.
In conclusion, in order to meet the requirements of high pressure difference, low leakage and ultralow temperature, the problem that the leakage of the domestic balance sealing ring is large in the ultralow temperature environment is urgently needed to be solved by researchers of the company.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the leakage of the balance sealing ring in the ultralow temperature environment is large;
in order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model relates to an ultra-low temperature low leakage high pressure balance type regulating valve, which comprises an upper sleeve and a lower sleeve which are mutually clamped; the upper sleeve and the lower sleeve are provided with through holes for lifting the valve core; the valve core is fixedly connected with one end of the valve rod, and the other end of the valve rod penetrates through the upper valve cover to be connected with the actuating mechanism; an annular groove is formed in the upper end face of the lower sleeve, and a guide wedge-shaped retaining ring and a disc spring group used for supporting the guide wedge-shaped retaining ring are placed in the annular groove; a PCTFE wedge-shaped sealing element is sleeved on the outer wall of the valve core, a wedge-shaped surface of the outer side surface of the PCTFE wedge-shaped sealing element is abutted against a wedge-shaped surface of the guide wedge-shaped retaining ring, and the inner side surface of the PCTFE wedge-shaped sealing element is attached to and sealed with the outer wall of the valve core;
the traditional single low-temperature high-pressure balance sealing ring deforms at ultralow temperature, so that a medium leaks from the balance sealing ring. The utility model adopts the wedge-shaped sealing element made of PCTFE, and the PCTFE wedge-shaped sealing element is not easy to deform at low temperature; the annular groove has been seted up on lower sleeve, is provided with dish spring group in the annular groove, and dish spring group is used for supporting the direction wedge and keeps off the ring, and the wedge face that the direction wedge kept off a side of ring cooperates with the wedge face of PCTFE wedge sealing member a side, keeps off ascending holding power with dish spring group to the direction wedge and truns into the power of PCTFE wedge sealing member level laminating case through the wedge face for the case is in the lift in-process and is laminated sealed all the time with PCTFE wedge sealing member.
In order to ensure that the supporting force of the disc spring group acting on the guide wedge-shaped retaining ring is kept consistent, the utility model adopts a limiting ring which is arranged by extending the guide wedge-shaped retaining ring downwards, the limiting ring is arranged in the annular groove, and the disc spring group is sleeved on the limiting ring;
the limiting ring enables the guide wedge-shaped retaining ring and the valve core to be concentrically arranged, and the limiting ring is limited by the disc spring group and can only move up and down, so that the PCTFE wedge-shaped sealing element is guaranteed to act everywhere to be equal, and the moving coaxiality of the valve core can be guaranteed.
In order to prevent rainwater and condensed water from entering the heat-insulating layer, the utility model adopts the structure that at least one water dripping plate is horizontally welded on the outer wall of the upper valve cover;
the water dripping plate can prevent rainwater and condensate water from entering the heat insulation layer and can relieve the upward transmission of the temperature of the valve body. Theoretical research and experimental verification, the utility model discloses welded two drip boards on last valve gap, can effectively reduce the extension length of last valve gap, its benefit has two points: the lengthening length of the upper valve cover is reduced, the consumption of materials is reduced, and the temperature of the filler is always kept to be higher than 0 ℃; and secondly, the length of the upper valve cover is reduced, the length of the valve rod is correspondingly shortened, the deformation deflection of the valve rod is correspondingly reduced, and the excellent coaxiality between the valve core and the valve rod is ensured, so that the aim of low leakage of the valve is fulfilled.
In order to ensure the sealing of the valve rod and the upper valve cover, the utility model adopts the technical scheme that a filler bottom pad is arranged at the gap between the valve rod and the upper valve cover, and an O-shaped ring is arranged outside the filler bottom pad and is attached to the inner wall of the upper valve cover; a valve rod sealing ring is arranged on the inner side of the packing bottom pad and is attached to the outer wall of the valve rod; the bottom of the packing bottom pad is provided with a packing flat pad which prevents the valve rod sealing ring from deforming and being clamped into the gap between the valve rod and the upper valve cover.
The traditional stuffing box is sealed only by compressing the stuffing to prevent the leakage of the medium, so that the requirement on the quality of the stuffing is high, and the friction force of the valve rod is greatly increased after the stuffing is compressed excessively. Aiming at the problem, a valve rod balance sealing ring is added in an inner hole of a packing bottom pad, and an O-shaped ring is additionally arranged at the outer edge of the packing bottom pad, so that the friction force of the valve rod is effectively reduced, the characteristic of micro leakage inside and outside a packing box is realized, and the reliability and the safety of the valve are greatly improved; in conclusion, the inner side and the outer side of the packing base gasket are respectively provided with the O-shaped ring and the valve rod sealing ring, so that the medium flowing into the gap between the valve rod and the upper valve cover can be internally and externally sealed; in order to prevent the valve rod sealing ring from being deformed and clamped into the gap between the valve rod and the upper valve cover, the filler flat gasket is additionally arranged on the filler base gasket, and the filler flat gasket cannot be deformed in the valve rod movement process, so that the valve rod sealing ring can be prevented from being clamped into the gap between the valve rod and the upper valve cover; in addition to this, the present invention is,
in order to explain the connection relationship of the valve body, the upper valve cover, the upper sleeve and the lower sleeve, the utility model adopts the technical scheme that the upper valve cover is fixedly connected with the valve body, the top of the upper sleeve is provided with an annular support lug, the upper end surface and the lower end surface of the support lug are both provided with sealing gaskets, and the sealing gaskets are clamped at the connection part of the upper valve cover and the valve body; a notch is arranged at the bottom of the lower sleeve, and a boss for supporting the notch is arranged in the middle of the valve body;
the utility model adopts the bolt and the nut to connect the upper valve cover with the valve body, and the top of the upper sleeve is provided with the support lug which is provided with the sealing gasket and is clamped at the joint of the upper valve cover and the valve body, thereby preventing the medium from leaking from the joint of the upper valve cover and the valve body;
to sum up, the boss of valve body is used for supporting lower sleeve, and upper and lower mutual joint of sleeve goes up the sleeve and is connected with the valve body through journal stirrup and last valve bonnet, has realized valve body, upper valve bonnet, upper sleeve, lower telescopic connection.
The utility model has the advantages that: the utility model relates to an ultra-low temperature low leakage high pressure balanced type governing valve through set up PCTFE wedge sealing member outside the case to and keep off the ring with the direction wedge that PCTFE wedge sealing member offseted, keep off ascending holding power of direction wedge group and trun into the power of PCTFE wedge sealing member level laminating case through the wedge face, make the case laminate throughout sealedly with PCTFE wedge sealing member at the lift in-process, solved the big problem of leakage of balanced sealing washer under the ultra-low temperature environment.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged view of FIG. 1 II;
FIG. 3 is an enlarged view of FIG. 1I;
FIG. 4 is an enlarged view of FIG. 1 III;
in the figure: 1-upper sleeve, 2-lower sleeve, 3-valve core, 4-valve rod, 5-upper valve cover, 6-annular groove, 7-guide wedge-shaped baffle ring, 8-disc spring group, 9-PCTFE wedge-shaped sealing element, 10-spacing ring, 11-water dropping plate, 12-packing bottom pad, 13-O-shaped ring, 14-valve rod sealing ring, 15-packing flat pad, 16-valve body, 17-annular support lug and 18-notch.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1-2, the utility model relates to an ultralow temperature low leakage high pressure balance type regulating valve, which comprises an upper sleeve 1 and a lower sleeve 2 which are mutually clamped; the upper sleeve 1 and the lower sleeve 2 are provided with through holes for the valve core 3 to lift and descend; the valve core 3 is fixedly connected with one end of a valve rod 4, and the other end of the valve rod 4 penetrates through an upper valve cover 5 to be connected with an actuating mechanism; an annular groove 6 is formed in the upper end face of the lower sleeve 2, and a guide wedge-shaped retaining ring 7 and a disc spring group 8 for supporting the guide wedge-shaped retaining ring 7 are placed in the annular groove 6; a PCTFE wedge-shaped sealing element 9 is sleeved on the outer wall of the valve core 3, a wedge-shaped surface of the outer side surface of the PCTFE wedge-shaped sealing element 9 is abutted against a wedge-shaped surface of the guide wedge-shaped baffle ring 7, and the inner side surface of the PCTFE wedge-shaped sealing element 9 is attached to and sealed with the outer wall of the valve core 3;
the traditional single low-temperature high-pressure balance sealing ring deforms at ultralow temperature, so that a medium leaks from the balance sealing ring. The utility model adopts the wedge-shaped sealing element made of PCTFE, and the PCTFE wedge-shaped sealing element is not easy to deform at low temperature; the annular groove has been seted up on lower sleeve, is provided with dish spring group in the annular groove, and dish spring group is used for supporting the direction wedge and keeps off the ring, and the wedge face that the direction wedge kept off a side of ring cooperates with the wedge face of PCTFE wedge sealing member a side, keeps off ascending holding power with dish spring group to the direction wedge and truns into the power of PCTFE wedge sealing member level laminating case through the wedge face for the case is in the lift in-process and is laminated sealed all the time with PCTFE wedge sealing member.
As shown in fig. 2, in order to ensure that the supporting force of the disc spring set acting on the guide wedge-shaped retaining ring is kept consistent, the utility model adopts a limiting ring 10 which is arranged by extending the guide wedge-shaped retaining ring 8 downwards, the limiting ring 10 is arranged in the annular groove 6, and the disc spring set 7 is sleeved on the limiting ring 10;
the limiting ring enables the guide wedge-shaped retaining ring and the valve core to be concentrically arranged, and the limiting ring is limited by the disc spring group and can only move up and down, so that the PCTFE wedge-shaped sealing element is guaranteed to act everywhere to be equal, and the moving coaxiality of the valve core can be guaranteed.
As shown in fig. 1, in order to prevent rainwater and condensed water from entering the heat insulation layer, the utility model adopts the structure that at least one water dropping plate 11 is horizontally welded on the outer wall of the upper valve cover 5;
the water dripping plate can prevent rainwater and condensate water from entering the heat insulation layer and can relieve the upward transmission of the temperature of the valve body. Theoretical research and experimental verification, the utility model discloses welded two drip boards on last valve gap, can effectively reduce the extension length of last valve gap, its benefit has two points: the lengthening length of the upper valve cover is reduced, the consumption of materials is reduced, and the temperature of the filler is always kept to be higher than 0 ℃; and secondly, the length of the upper valve cover is reduced, the length of the valve rod is correspondingly shortened, the deformation deflection of the valve rod is correspondingly reduced, and the excellent coaxiality between the valve core and the valve rod is ensured, so that the aim of low leakage of the valve is fulfilled.
As shown in fig. 3, in order to ensure the sealing between the valve rod and the upper bonnet, a packing bottom pad 12 is arranged at the gap between the valve rod 4 and the upper bonnet 5, and an O-ring 13 is arranged outside the packing bottom pad 12 and attached to the inner wall of the upper bonnet 5; a valve rod sealing ring 14 is arranged on the inner side of the packing bottom pad 12 and is attached to the outer wall of the valve rod 4; the bottom of the packing bottom pad 12 is provided with a packing flat pad 15 which prevents the valve rod sealing ring 14 from deforming and being clamped into the gap between the valve rod 4 and the upper valve cover 5.
The traditional stuffing box is sealed only by compressing the stuffing to prevent the leakage of the medium, so that the requirement on the quality of the stuffing is high, and the friction force of the valve rod is greatly increased after the stuffing is compressed excessively. Aiming at the problem, a valve rod balance sealing ring is added in an inner hole of a packing bottom pad, and an O-shaped ring is additionally arranged at the outer edge of the packing bottom pad, so that the friction force of the valve rod is effectively reduced, the characteristic of micro leakage inside and outside a packing box is realized, and the reliability and the safety of the valve are greatly improved; in conclusion, the inner side and the outer side of the packing base gasket are respectively provided with the O-shaped ring and the valve rod sealing ring, so that the medium flowing into the gap between the valve rod and the upper valve cover can be internally and externally sealed; in order to prevent the valve rod sealing ring from being deformed and clamped into the gap between the valve rod and the upper valve cover, the filler flat gasket is additionally arranged on the filler base gasket, and the filler flat gasket cannot be deformed in the valve rod movement process, so that the valve rod sealing ring can be prevented from being clamped into the gap between the valve rod and the upper valve cover; in addition to this, the present invention is,
as shown in fig. 4, in order to illustrate the connection relationship between the valve body, the upper valve cover, the upper sleeve and the lower sleeve, the upper valve cover 5 is fixedly connected with the valve body 16, the top of the upper sleeve 1 is provided with an annular support lug 17, the upper end surface and the lower end surface of the support lug 17 are both provided with a sealing gasket 18, and the sealing gaskets are clamped at the connection position of the upper valve cover 5 and the valve body 16; a notch 18 is arranged at the bottom of the lower sleeve 2, and a boss for supporting the notch 18 is arranged at the middle part in the valve body 1;
the utility model adopts the bolt and the nut to connect the upper valve cover with the valve body, and the top of the upper sleeve is provided with the support lug which is provided with the sealing gasket and is clamped at the joint of the upper valve cover and the valve body, thereby preventing the medium from leaking from the joint of the upper valve cover and the valve body;
to sum up, the boss of valve body is used for supporting lower sleeve, and upper and lower mutual joint of sleeve goes up the sleeve and is connected with the valve body through journal stirrup and last valve bonnet, has realized valve body, upper valve bonnet, upper sleeve, lower telescopic connection.
The utility model relates to an ultra-low temperature low leakage high pressure balanced type governing valve through set up PCTFE wedge sealing member outside the case to and keep off the ring with the direction wedge that PCTFE wedge sealing member offseted, keep off ascending holding power of direction wedge group and trun into the power of PCTFE wedge sealing member level laminating case through the wedge face, make the case laminate throughout sealedly with PCTFE wedge sealing member at the lift in-process, solved the big problem of leakage of balanced sealing washer under the ultra-low temperature environment.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides an ultra-low temperature low leakage high pressure balanced type governing valve which characterized in that: comprises a flange type upper sleeve, a lower sleeve and a valve core;
the valve core is fixedly connected with one end of the valve rod, and the other end of the valve rod penetrates through the upper valve cover to be connected with the actuating mechanism;
an annular groove is formed in the upper end face of the lower sleeve, and a guide wedge-shaped retaining ring and a disc spring group used for supporting the guide wedge-shaped retaining ring are placed in the annular groove;
the outer wall of the valve core is sleeved with a PCTFE wedge-shaped sealing element, a wedge-shaped surface of the outer side surface of the PCTFE wedge-shaped sealing element is abutted to a wedge-shaped surface of the guide wedge-shaped retaining ring, and the inner side surface of the PCTFE wedge-shaped sealing element is attached to the outer wall of the valve core in a sealing mode.
2. The ultra-low temperature low leakage high pressure balanced type regulator valve of claim 1, wherein: the limiting ring is arranged in the annular groove, and the disc spring group is sleeved on the limiting ring.
3. The ultra-low temperature low leakage high pressure balanced type regulator valve of claim 1, wherein: at least one water dripping plate is horizontally welded on the outer wall of the upper valve cover.
4. The ultra-low temperature low leakage high pressure balanced type regulator valve of claim 1, wherein: a filler bottom pad is arranged at the gap between the valve rod and the upper valve cover, and an O-shaped ring is arranged on the outer side of the filler bottom pad and attached to the inner wall of the upper valve cover; a valve rod sealing ring is arranged on the inner side of the packing bottom pad and is attached to the outer wall of the valve rod;
the bottom of the packing bottom pad is provided with a packing flat pad which prevents the valve rod sealing ring from being deformed and clamped into a gap between the valve rod and the upper valve cover.
5. The ultra-low temperature low leakage high pressure balanced type regulator valve of claim 1, wherein: the upper valve cover is fixedly connected with the valve body, the top of the upper sleeve is provided with an annular support lug, the upper end surface and the lower end surface of the support lug are both provided with sealing gaskets, and the upper end surface and the lower end surface of the support lug are clamped at the joint of the upper valve cover and the valve body;
the bottom of the lower sleeve is provided with a notch, and the middle part in the valve body is provided with a boss for supporting the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357098.7U CN211779046U (en) | 2020-03-19 | 2020-03-19 | Ultralow-temperature low-leakage high-pressure balanced type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357098.7U CN211779046U (en) | 2020-03-19 | 2020-03-19 | Ultralow-temperature low-leakage high-pressure balanced type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211779046U true CN211779046U (en) | 2020-10-27 |
Family
ID=72932425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020357098.7U Active CN211779046U (en) | 2020-03-19 | 2020-03-19 | Ultralow-temperature low-leakage high-pressure balanced type regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211779046U (en) |
-
2020
- 2020-03-19 CN CN202020357098.7U patent/CN211779046U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105452742A (en) | Vacuum valve | |
| CN102679414A (en) | Efficient energy-saving environment-friendly multifunctional kitchen range | |
| CN201448469U (en) | Full lining ceramic ball valve | |
| CN211779046U (en) | Ultralow-temperature low-leakage high-pressure balanced type regulating valve | |
| CN202867871U (en) | High-temperature high-pressure corrugated-pipe adjusting valve | |
| CN210087999U (en) | Double-balance type corrugated pipe pressure reducing valve | |
| CN202937823U (en) | Zero leakage regulating valve with double valve seats | |
| CN111237484A (en) | Ultralow-temperature low-leakage high-pressure balanced type regulating valve | |
| CN209622074U (en) | A kind of low form sleeve-type regulating valve sealing structure | |
| CN201159314Y (en) | High-performance full bore type safety valve | |
| CN216479140U (en) | Exempt from upper cover governing valve | |
| CN209245441U (en) | High temperature and pressure compounded mix control valve | |
| CN210599172U (en) | Water injection opening cover | |
| CN210196580U (en) | Energy regulating valve | |
| CN213271121U (en) | Four-way flange three-way control valve | |
| CN213929482U (en) | Double-sealing ring balanced type structure regulating valve | |
| CN209705319U (en) | High-performance ball valve for coal chemical industry | |
| CN109751419B (en) | Double-balance type corrugated pipe pressure reducing valve | |
| CN215172266U (en) | Pilot-operated steam pressure reducing valve | |
| CN205101570U (en) | Formula of relying on oneself low temperature governing valve | |
| CN204164452U (en) | The two diaphragm type steam reducing valve of a kind of type pilot | |
| CN220540315U (en) | Cryogenic control valve with cold box structure | |
| CN220891138U (en) | Anti-dissipation switch type ball valve | |
| CN201246597Y (en) | Adjustable precursor type steam drain valve | |
| CN219841063U (en) | Novel high-performance gas film type large adjustable ratio regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |