CN103711950A - Double block and bleed pressure balance type inverted plug valve - Google Patents
Double block and bleed pressure balance type inverted plug valve Download PDFInfo
- Publication number
- CN103711950A CN103711950A CN201410012171.6A CN201410012171A CN103711950A CN 103711950 A CN103711950 A CN 103711950A CN 201410012171 A CN201410012171 A CN 201410012171A CN 103711950 A CN103711950 A CN 103711950A
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- valve
- cock
- pressure balance
- stopcock
- balance type
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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
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
- F16K5/025—Particular coverings or materials
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
- F16K5/0257—Packings
- F16K5/0278—Packings on the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a double block and bleed pressure balance type inverted plug valve which comprises a valve body, plug cocks, valve rods and filler. The plug cocks are arranged in the inner cavity of the valve body, the valve rods drive the plug cocks to rotate, the sealing faces of the plug cocks are conical surfaces, one valve body is arranged, the two plug cocks are connected in series, a safety relief valve is arranged in a valve body middle cavity between the two plug cocks, the plug cocks are inverted conical valve plugs, the ends, connected with the valve rods, of the conical valve plugs are smaller than the other ends of the conical valve plugs, the valve rods are connected with the plug cocks through cross connectors, cylindrical springs or belleville springs are arranged between the valve rods and the plug cocks, valve covers are fixed to the lower end of the valve body, an adjusting shaft is arranged on each valve cover, the lower ends of the adjusting shafts stretch out of the valve covers, and the upper ends of the adjusting shafts abut against the plug cocks. The double block and bleed pressure balance type inverted plug valve has the DBB function, can be used at high temperature and high pressure and under severe working conditions, and has the advantages of being reliable in sealing, small in operating torque, long in service life and the like.
Description
Technical field
The invention belongs to technical field of valve manufacturing, be specifically related to a kind of having a double meaning double break pressure balance type upside-down mounting stopcock, for the control of gas, liquid conducting pipes.
Background technique
At present domestic used stopcock is all to take soft seal, small-bore, low-pressure as main, can not solve the application of stopcock under high temperature, high pressure, harsh operating mode completely, the main dependence on import of high-end stopcock product.Due to stopcock as easy as rolling off a log wearing and tearing that cause sealing surface in the process of opening and closing, to such an extent as to cause the serious problems such as valve leak, cock be stuck.So machining accuracy and quality of fit that the cock of stopcock and valve body sealing surface require are very high.In addition, API(American Petroleum Institute, API) pipeline is required to have having a double meaning double break function (Double Block & Bleed, DBB) with valve, common pressure balance type upside-down mounting stopcock does not possess this function.
Chinese utility model patent 200820127329.4 discloses a kind of having a double meaning double break valve, comprise the left and right sealing slide plate that is arranged on the cock left and right sides, during valve closing, first by operation equipment by cock and sealing slide plate half-twist, and then rotation hand wheel moves down cock, along with the motion of cock, promote the liquid entrance end face that slide plate is close to valve inner, until elastic seal ring is expressed on end face uniformly, forms and seal; During valve opening, first rotation hand wheel promotes cock, and sealing slide plate is retracted from valve body bi-side, when sealing slide plate, regains depart from after valve body sealing surface completely, at rotary operating device, makes cock and the rotation of sealing slide plate, and valve is in enable possition; This patent is to be reached and cut off two ends pipeline object completely by two sealing slide plates and setting cock therebetween, and two sealing slide plates compress and realize having a double meaning double break at valve liquid entrance two ends.But, the drawback of the valve maximum of this spline structure be cock easily stuck, easy to wear, the inconvenient maintenance of sealing slide plate, working life are short, and this valve Security is not high, when the bad seals of one end, the pressure medium of leakage is difficult to release.
Summary of the invention
In order to address the above problem, the invention provides a kind of having a double meaning double break pressure balance type upside-down mounting stopcock that can use under high temperature, high pressure and harsh operating mode, this stopcock has the advantages such as sealing is reliable, operational torque is little, long service life.
The present invention for the technological scheme that solves its technical problem and adopt is:
A kind of having a double meaning double break pressure balance type upside-down mounting stopcock, comprise valve body, cock, valve rod and filler, described cock is arranged in described body cavity, described valve rod drives described cock to rotate, and the sealing surface of cock is the conical surface, and described valve body is provided with one, described cock is provided with two, and described two cocks series connection, the valve body lumen between two cocks is provided with safety relief valve, and described cock is the cone-shaped valve plug that one end of being connected with valve rod is less than the upside-down mounting of the other end.
The present invention reaches by two cocks and a safety relief valve therebetween the object of cutting off two ends pipeline completely, close two cocks and open the Security that bleeder valve can improve system, if first cock is leaked, leakage from medium can be derived by the safety relief valve of opening, with this, realize having a double meaning double break and drainage function.
The cock mounting type of the having a double meaning double break pressure balance type of the present invention upside-down mounting stopcock is upside-down mounting type.When valve closing, the pressure medium of the upper and lower cavity of stopcock equates, because there is area difference cock lower end and upper end, therefore, it is tightr that the thrust of medium can make that cock contacts with valve body, and the sealing surface of cock and valve can better be sealed.
The present invention for the further technological scheme that solves its technical problem and adopt is:
Say further, described valve rod is connected by cross connector with described cock, and is provided with cylindrical spring or butterfly spring between described valve rod and described cock.
By cross connector, connect, the power that medium acts in cock can not be directly delivered on valve rod, effectively solve prior art valve rod and be connected with the design of cock integral type or alternate manner cock and the valve rod bulk deformation bringing, cause cock or valve rod stuck with surface tear phenomenon; Belleville spring or cylindrical spring are placed in the place being connected with cock at valve rod in addition; the elastic force of spring and the self gravitation of cock can make to occur micro-gap between cock and valve body sealing surface; so not only reduced the unlatching moment of torsion of valve; also can effectively protect sealing surface; under worst hot case; the thermal expansion of cock can be repaired by its lifting; avoid high temperature stuck phenomenon; therefore; guarantee that on the one hand cock can adjust up and down in valve body, effectively prevent that on the other hand phenomenon from appearring killing in cock and valve body.
Say further, described valve body is fixed with valve gap, and described valve gap is provided with adjustment axle, described adjustment axle can the screw on valve gap in rotation so that self lifting, one end of described adjustment axle is piercing in the stub end that the outer and the other end of described valve gap is supported cock.
By rotation, adjust the Percent of contact area of axle regulating cock and valve seal, guarantee sealing.
Say further, the stub end of described cock is provided with the first safety check.
In the moment of valve opening, because the stub end of cock has the first safety check, when the chamber pressure of cock stub end is too high, the first safety check can be opened, therefore lay down the pressure of cock stub end cavity, also can not make that cock is unconfined upwards alters, cause stuck phenomenon.
Say further, the sealing surface of described cock is provided with seal grease groove, and described valve body is provided with oil storage tank, and the oil storage tank of valve body communicates with the seal grease groove of cock, and valve body is provided with the fuel feeding valve communicating with oil storage tank outward.
The sealing surface of cock has seal grease groove, and body cavity is also provided with oil storage tank, can inject seal grease by fuel feeding valve, by rotation cock, seal grease is spread upon on the sealing surface of valve body and cock equably, form the continuous oil film of one deck, make valve reach zero leakage.Although having a double meaning double break pressure balance type upside-down mounting stopcock adopts seal grease to reduce, open and close moment and improve sealability, may the medium circulating in pipeline be produced and be polluted.Therefore, under the condition of different medium and operating mode, the seal grease that needs selection to adapt with it.
Preferably, between described fuel feeding valve and described oil storage tank, be provided with the second safety check.
Preferably, the structure that described adjustment axle is supported the stub end of cock is: described cock stub end center offers V-shape hole, be provided with spheroid and ball seat, described spheroid is positioned at described V-shape hole and ball seat, between described ball seat and described adjustment axle, be provided with seal membrane, described body cavity is provided with step, and described seal membrane edge is against described step, and is provided with seal ring between seal membrane edge and step.
Preferably, be provided with and adjust axial compression lid, it is outside that described adjustment axial compression lid is removably covered in described adjustment axle.
Say further, on the sealing surface of described cock, be coated with curing molybdenum layer, polytetrafluoroethylene floor or carburization zone, or the sealing surface of cock is carried out to nitriding processing or pile-up welding hard alloy.
Say further, the passage of described cock is straight cylinder type or Venturi type, and the cross section of the passage of described cock is circular or trapezoidal.
Say further, the cone angle of the sealing surface of the cone-shaped of described cock is 9 °.
Say further, described the first safety check is provided with two.
The invention has the beneficial effects as follows:
1) by two cocks and a safety relief valve therebetween, reach the object of cutting off two ends pipeline completely, close two cocks and open the Security that bleeder valve can improve system, if first cock is leaked, leakage from medium can be derived by the safety relief valve of opening, with this, realize having a double meaning double break and drainage function;
2) cock mounting type is upside-down mounting type, and when valve closing, the pressure medium of the upper and lower cavity of stopcock equates, because there is area difference cock lower end and upper end, therefore, it is tightr that the thrust of medium can make that cock contacts with valve body, and the sealing surface of cock and valve can better be sealed;
3) at valve rod and cock place, place one group of belleville spring or cylindrical spring, guarantee that on the one hand cock can adjust up and down in valve body, effectively prevent that on the other hand phenomenon from appearring killing in cock and valve body;
4) between valve rod and cock, by cross connector, connected, effectively solve the design of valve rod and cock integral type or alternate manner and is connected cock and the valve rod bulk deformation bringing, cause cock or valve rod stuck with surface tear phenomenon;
5) stub end of cock has the first safety check, effectively avoids the stuck phenomenon causing because of cock stub end chamber pressure;
6) design of closed oil groove, reduces seal grease as far as possible and enters in pipeline, and medium is polluted;
7) adjust the design of axle, reliable sealing is provided;
8) according to different operating modes, cock surface is processed, as spraying molybdenum disulfide or PTFE, reduce friction factor, reduce moment of torsion, increase the service life; Pile-up welding hard alloy or spraying carbide or nitriding are processed, and improve cock surface hardness, and corrosion-proof wear is applicable to harsh operating mode.
Accompanying drawing explanation
Fig. 1 is one of schematic diagram of a kind of having a double meaning double break pressure balance type upside-down mounting stopcock structure of the present invention (two valve rods are equidirectional);
Fig. 2 be a kind of having a double meaning double break pressure balance type upside-down mounting stopcock structure of the present invention (two valve rods are equidirectional) schematic diagram two;
Fig. 3 is one of schematic diagram of the having a double meaning double break pressure balance type of another kind of the present invention upside-down mounting stopcock structure (two valve rod different direction);
Fig. 4 is the schematic diagram that valve rod of the present invention is connected with cock;
Fig. 5 is the schematic diagram of cock oil groove of the present invention;
Fig. 6 is the schematic diagram that the present invention adjusts axle;
Description of reference numerals:
1-valve body; 2-valve rod; 3-butterfly spring; 4-cross connector; 5-cock;
6-fuel feeding valve; 7-the second safety check; 8-filler; 9-valve gap; 10-spheroid;
11-seal membrane; 12-adjusts axle; 13-adjusts axial compression lid;
14-the second safety check; 15-safety relief valve.
Embodiment
Below, by specific instantiation explanation the specific embodiment of the present invention, those skilled in the art can understand advantage of the present invention and effect easily by content disclosed in the present specification.The present invention also can other different mode be implemented, and, under not departing from disclosed category, can give different modifications and change that is.
Embodiment: refer to shown in accompanying drawing, the invention will be further elaborated.
As shown in Figure 1, Figure 2 and Figure 3, the invention provides a kind of having a double meaning double break pressure balance type upside-down mounting stopcock that cock is stuck that seals reliably, prevents.Comprising important spare parts such as valve body 1, valve rod 2, butterfly spring 3, cross connector 4, cock 5, fuel feeding valve 6, the second safety check 7, filler 8, valve gap 9, spheroid 10, seal membrane 11, adjustment axle 12, adjustment axial compression lid the 13 and second safety check 14.Form by cock runner hole can be divided into conventional straight cylinder type or Venturi type.Valve body and internals material select kind many, and applied range is applicable to various media.Cock of the present invention is the cone-shaped valve plug that one end of being connected with valve rod is less than the upside-down mounting of the other end, can change online easily worn part, convenient for maintaining and maintenance.DBB is the abbreviation of Double block and bleed, i.e. having a double meaning double break.Having a double meaning double break pressure balance type upside-down mounting stopcock of the present invention, its cock is arranged in described body cavity, and valve rod drives cock to rotate, and valve body is provided with one, cock is provided with two, and two cock series connection, the valve body lumen between two cocks is provided with safety relief valve 15, can realize DBB function, this type of stopcock can not only be arranged on conventional pipeline and use, also can installing and using requiring to have on the pipeline of DBB function, under harsh operating mode, is the best alternative of DBB pipeline ball-valve.Fig. 1 and Fig. 2 are that a kind of two valve rods are at unidirectional having a double meaning double break pressure balance type upside-down mounting stopcock; Fig. 3 be a kind of two valve rods not at unidirectional having a double meaning double break pressure balance type upside-down mounting stopcock, structure is different, function is just the same.Having a double meaning double break pressure balance type upside-down mounting stopcock also has advantages of other, if one of them cock goes wrong, can not seal, a cock is not in addition affected by it, can guarantee that pipeline continues operation, leak from medium can be derived by the safety relief valve of opening.Also can cock be changed online and be keeped in repair according to actual conditions.
As shown in Figure 4, between valve rod 2 and cock 5, adopt cross connector 4 to be connected; Between valve rod 2 and cock 5, there is butterfly spring 3, prevent that cock 5 and valve body 1 from killing, solve under high-temperature condition the stuck phenomenon that the thermal expansion by cock causes; By cross connector 4, connect, the power that medium acts in cock 5 can not be directly delivered on valve rod 2, causes valve rod 2 stress deformations, even with filler 8, stuck phenomenon occurs.
As shown in Figure 5, the sealing surface of cock has seal grease groove, and body cavity is also provided with oil storage tank, can inject seal grease by fuel feeding valve 6, by rotation cock 5, seal grease be spread upon on the sealing surface of valve body 1 and cock 5 equably, form the continuous oil film of one deck, make valve reach zero leakage.According to different operating modes, cock 5 surfaces are processed, as spraying molybdenum disulfide or PTFE, reduce friction factor, reduce moment of torsion, increase the service life; Pile-up welding hard alloy or spraying carbide, improve cock 5 surface hardnesses, and corrosion-proof wear, is applicable to harsh operating mode;
As shown in Figure 6, by adjusting the Percent of contact area of axle 12 regulating cocks 5 and valve body 1 sealing, guarantee sealing.Described cock 5 stub end centers offer V-shape hole, be provided with spheroid 10 and ball seat, described spheroid is positioned at described V-shape hole and ball seat, between described ball seat and described adjustment axle, be provided with seal membrane 11, described body cavity is provided with step, described seal membrane edge is against described step, and is provided with seal ring between seal membrane edge and step.Seal membrane 11 has certain elasticity and ductility, and making to adjust axle 12 can up-down adjustment, adjusts between axle 12 and cock 5 and adopts spheroid 10 to support, and in adjustment process, the thrust that cock 5 is subject to is even, guarantees that cock 5 is concentric with valve body 1.After mixing up, install adjustment axial compression lid 13 and not only can prevent random adjustment, also can prevent that dust from entering.Stub end in cock 5 arranges the first safety check 14, mainly prevents that the pressure of the cavity of cock 5 stub ends from raising to the excessive stuck phenomenon causing of the thrust making progress of cock.Common greasing stopcock is not placed safety check, causes like this runner hole directly to communicate with cock major part cavity, for some temperature influences, changes medium greatly, is easily filled in cock major part cavity the inside, causes the cock can not up-down adjustment.
Claims (10)
1. a having a double meaning double break pressure balance type upside-down mounting stopcock, comprise valve body (1), cock (5), valve rod (2) and filler (8), described cock is arranged in described body cavity, described valve rod drives described cock to rotate, the sealing surface of cock is the conical surface, it is characterized in that: described valve body is provided with one, described cock is provided with two, and described two cocks series connection, valve body lumen between two cocks is provided with safety relief valve (15), and described cock is the cone-shaped valve plug that one end of being connected with valve rod is less than the upside-down mounting of the other end.
2. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 1, is characterized in that: described valve rod is connected by cross connector (4) with described cock, and between described valve rod and described cock, is provided with cylindrical spring or butterfly spring (3).
3. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 2, it is characterized in that: described valve body is fixed with valve gap (9), described valve gap is provided with adjusts axle (12), described adjustment axle can the screw on valve gap in rotation so that self lifting, one end of described adjustment axle is piercing in the stub end that the outer and the other end of described valve gap is supported cock.
4. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 2, is characterized in that: the stub end of described cock is provided with the first safety check (14).
5. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 1, it is characterized in that: the sealing surface of described cock is provided with seal grease groove, described valve body is provided with oil storage tank, the oil storage tank of valve body communicates with the seal grease groove of cock, and valve body is provided with the fuel feeding valve (6) communicating with oil storage tank outward.
6. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 5, is characterized in that: between described fuel feeding valve and described oil storage tank, be provided with the second safety check (7).
7. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 3, it is characterized in that: the structure that described adjustment axle is supported the stub end of cock is: the stub end center of described cock offers V-shape hole, be provided with spheroid (10) and ball seat, described spheroid is positioned at described V-shape hole and ball seat, between described ball seat and described adjustment axle, be provided with seal membrane (11), described body cavity is provided with step, described seal membrane edge is against described step, and is provided with seal ring between seal membrane edge and step.
8. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 7, is characterized in that: be provided with and adjust axial compression lid (13), it is outside that described adjustment axial compression lid is removably covered in described adjustment axle.
9. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 1, it is characterized in that: on the sealing surface of described cock, be coated with curing molybdenum layer, polytetrafluoroethylene floor or carburization zone, or the sealing surface of cock is carried out to nitriding processing or pile-up welding hard alloy.
10. having a double meaning double break pressure balance type upside-down mounting stopcock as claimed in claim 1, is characterized in that: the passage of described cock is straight cylinder type or Venturi type, and the cross section of the passage of described cock is circular or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012171.6A CN103711950A (en) | 2014-01-10 | 2014-01-10 | Double block and bleed pressure balance type inverted plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012171.6A CN103711950A (en) | 2014-01-10 | 2014-01-10 | Double block and bleed pressure balance type inverted plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103711950A true CN103711950A (en) | 2014-04-09 |
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ID=50405171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410012171.6A Pending CN103711950A (en) | 2014-01-10 | 2014-01-10 | Double block and bleed pressure balance type inverted plug valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN103711950A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435751A (en) * | 2017-07-26 | 2017-12-05 | 四川华林阀仪表科技有限公司 | A kind of power-saving balanced formula quick high-pressure valve and design method |
| CN108119663A (en) * | 2017-12-26 | 2018-06-05 | 福斯流体控制（苏州）有限公司 | Metal hard-sealing high temperature high pressure stop cock |
| WO2018188500A1 (en) * | 2017-04-12 | 2018-10-18 | 杭州三花研究院有限公司 | Electronic expansion valve |
| CN112576775A (en) * | 2020-12-11 | 2021-03-30 | 超达阀门集团股份有限公司 | Adjust simple and convenient reliable back taper plug valve that seals |
-
2014
- 2014-01-10 CN CN201410012171.6A patent/CN103711950A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018188500A1 (en) * | 2017-04-12 | 2018-10-18 | 杭州三花研究院有限公司 | Electronic expansion valve |
| US11703258B2 (en) | 2017-04-12 | 2023-07-18 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electronic expansion valve |
| CN107435751A (en) * | 2017-07-26 | 2017-12-05 | 四川华林阀仪表科技有限公司 | A kind of power-saving balanced formula quick high-pressure valve and design method |
| CN107435751B (en) * | 2017-07-26 | 2019-03-12 | 四川华林阀仪表科技有限公司 | A kind of balanced type quick high-pressure valve and design method |
| CN108119663A (en) * | 2017-12-26 | 2018-06-05 | 福斯流体控制（苏州）有限公司 | Metal hard-sealing high temperature high pressure stop cock |
| CN112576775A (en) * | 2020-12-11 | 2021-03-30 | 超达阀门集团股份有限公司 | Adjust simple and convenient reliable back taper plug valve that seals |
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Application publication date: 20140409 |