CN103727254B - A kind of High Temperature High Pressure self balancing modulating valve - Google Patents
A kind of High Temperature High Pressure self balancing modulating valve Download PDFInfo
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- CN103727254B CN103727254B CN201410038107.5A CN201410038107A CN103727254B CN 103727254 B CN103727254 B CN 103727254B CN 201410038107 A CN201410038107 A CN 201410038107A CN 103727254 B CN103727254 B CN 103727254B
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- valve
- flap
- high temperature
- valve pocket
- packing washer
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/265—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a sleeve sliding in the direction of the flow line
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/04—Devices for relieving the pressure on the sealing faces for sliding valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention discloses a kind of High Temperature High Pressure self balancing modulating valve, comprises valve body, flap, valve pocket, packing washer, seal ring, valve gap, valve rod and equalizing orifice; Flap is arranged in valve pocket; Valve pocket is arranged in the cavity of valve body, along the adjustment hole be circumferentially provided with for adjust flux of valve pocket bottom; Packing washer is arranged between the top of flap and valve pocket; Valve gap and valve body are fixedly connected; Valve rod is through valve gap, and its underpart and flap are actively coupled; Seal ring is arranged in the annular groove that forms between flap and packing washer and valve pocket; Shape bottom the lower end surface of packing washer and flap annular groove is to the conical surface of circular direction crush seal circle in valve pocket, inclined-plane or sphere.By pulling flap to open valve pocket flow regulating orifices circumferentially to regulate rate-of flow, the Flow-rate adjustment under high-temperature and high-pressure conditions can be realized simultaneously and cut off completely.
Description
Technical field
The present invention relates to a kind of valve, particularly relate under one is applicable to high temperature, high pressure or corrosive environment, there is the High Temperature High Pressure self balancing modulating valve of Flow-rate adjustment and complete cutting function.
Background technique
Modulating valve is flow control valve important on petrochemical industry, oil field, metallurgy, thermoelectricity plant's equal pressure pipeline, and when valve is used for high temperature, high pressure and big orifice pipeline, must overcome the pressure medium that open-shut device bears could operated valve.
Pressure self-balancing modulating valve can pass through pressure self-balancing principle, makes the pressure medium self balancing acted on open-shut device, has become the main direction of studying of existing big orifice high-temperature high-pressure regulating valve.Existing pressure self-balancing modulating valve, the seal rings such as usual employing " O " type, " Y " type seal, due to the pressure self-sealing that such seal ring can utilize pressure medium to be formed seal ring, the seal degree of seal ring and the height of pressure medium are had nothing to do, also have nothing to do with the size of seal preload during installation seal ring, its seal degree does not change with causing the decline of seal preload after ring wear, therefore has lasting airtight quality and sealing life reliably.Because the seal rings such as " O " type, " Y " type must adopt highdensity elastic material to make, the material that can be used in making the seal ring such as " O " type, " Y " type is at present rubber, the plastic or other material of non-refractory.Due to the restriction of sealing ring material, when pressure self-balancing modulating valve is used for less than 200 DEG C, can not only Flow-rate adjustment be carried out, also there is good medium cutting function, but during for various lots of high temperature pressure pipeline, no longer there is the cutting function of high temperature media.
Research finds, some low-density sealing materials have high temperature resistant, corrosion resistant performance.Such as, Expanded graphite is exactly a kind of loose Low-density high temperature resistant material, works, do not decompose under high temperature, high pressure or radiation condition, and distortion or aging, stable chemical nature, is generally used for the stuffing box packing of high temperature rod member.Because Expanded graphite is not high-density sealed material, be not therefore suitable for the seal ring such as making " O " type, " Y " type.High-temperature-resistant flexible graphite in resistant to elevated temperatures pressure self-balancing stop valve, can be applied to self-balance stop valve as sealing material in the patent (CN2637835Y) of application in 2003 by inventor, solves the resistant to elevated temperatures problem of sealing material.In that patent, valve adopts the high temperature sealing materials such as Expanded graphite to make seal ring, and is made up the low density problem of such high temperature sealing material by the method arranging pressure ring press seal circle, realizes seal ring to the sealing between flap cylindrical and valve body.Because the encapsulating method in this structure does not have pressure self-sealing characteristic, the seal degree of seal ring to flap places one's entire reliance upon pressure ring to the seal preload produced after seal ring compression, in using process, its seal degree can decline to the wearing and tearing of seal ring along with flap, therefore can't meet application request the sealing life of this patent.
In order to improve the effect of flexible graphite packing, Liu Wangyou once disclosed a kind of stop valve of new structure, and disclose following technical characteristics (see chemical fertilizer industry, 2nd phase in 1989, the 39th page of right hurdle the 11st walked to the 24th row, new structure stop valve schematic diagram): be provided with Gland, filler, pad successively from top to bottom in valve, Gland and pad co-extrusion filler can be made by the handwheel screwing valve.The surface of contact of Gland and filler is sphere, and tightness is improved greatly, and the effect of sphere can also make the wearing and tearing on filler top be compensated at any time.Mention in this article,, by arranging Gland, impacting force is applied to filler, obtain the sealing of filler to valve head bar portion, and by adopting the surface of contact of Gland and filler to be sphere, carry out the impacting force of reinforcing filler to valve head bar portion, thus improve filler inner circle further to the sealing in valve head bar portion.But in practical application, to the sealing of valve head, not only depend on the sealing of filler inner circle to valve head bar portion, also depend on the sealing between filler cylindrical and stuffing box, along with valve head bar portion in using process is to the wearing and tearing of filler inner circle, the seal preload of the inside and outside circle of filler must be caused to decline, when seal preload is lower than pressure medium thereupon, between the cylindrical that leakage occurs in the relatively low filler of seal preload immediately and stuffing box, and flow out along between the cylindrical and stuffing box of Gland.Also mention in this article: " filler have within one or two months, all need not compress ", the stop valve mentioned in this article as can be seen here not only sealing life short, and repeatedly and timely must compress the sealing that filler could keep valve head, technological scheme disclosed in this article is not suitable for the sealed environment of pressure self-balancing modulating valve.
Inventor is at " a kind of uniaxial pressure self-balance stop valve " of application in 2011, disclose one and can realize high temperature high voltage resistant, corrosion resistant uniaxial pressure self-balance stop valve, this structure fundamentally solves the technical barrier that pressure self-balancing stop valve cannot be used for high temperature media environment so far, makes this product be applicable to the high temperature of more than 650 DEG C one-way flow media, the blocking or opening of high pressure pipe line.But this product cannot realize the adjustment of flow, existing pressure self-balancing structure adjusting valve is not suitable for the Flow-rate adjustment of high-temperature high-pressure medium yet.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provides a kind of long service life, has the High Temperature High Pressure self balancing modulating valve of Flow-rate adjustment and complete cutting function.
Technological scheme: High Temperature High Pressure self balancing modulating valve of the present invention, comprises valve body, flap, valve pocket, packing washer, seal ring, valve gap, valve rod and equalizing orifice; Flap is arranged in valve pocket; Valve pocket is arranged in the cavity of valve body, valve pocket bottom be circumferentially provided with flow regulating orifices; Packing washer is arranged between the top of flap and described valve pocket; Seal ring is arranged in the annular groove that forms between flap and packing washer and valve pocket internal circular surfaces; Seal ring is made up of high temperature resistant or corrosion resistant sealing material; Shape bottom the lower end surface of packing washer and described flap annular groove is extrude the conical surface of described seal ring, inclined-plane or sphere to circular direction in valve pocket; Valve gap and valve body are fixedly connected; Valve rod is through valve gap, and its underpart and flap are actively coupled.
During work, by outwards crush seal circle common bottom the underpart of packing washer and flap annular groove, under the stop of valve pocket internal circular surfaces, seal ring with outer surface is made to obtain the seal preload larger compared with its internal circular surfaces, and bottom flap annular groove, obtain enough sealed extruded power, the medium infiltrating seal ring internal circular surfaces can be blocked reliably and flow out medium channel bottom flap annular groove.Along with the flap that pulls of valve rod is mentioned gradually, be arranged on valve pocket flow regulating orifices to be circumferentially opened gradually, rate-of flow becomes large gradually until reach the flow value of operating mode needs, when valve is opened completely, rate-of flow reaches maximum value, when needs cut off flowing medium completely, flap moves down gradually under the promotion of valve rod, seals until valve clack sealing surface and sealing surface of seat are adjacent to form.
High temperature sealing material of the present invention is preferably flexible graphite material, corrosion-resistant sealing material is preferably polytetrafluoroethylmaterial material, along with the progress of science and technology, increasing sealing material is found, is synthesized, any have high temperature resistant or corrosion-resistant or other the sealing material of function and can adopt structure of the present invention, realizes selfsealings effect; Described rigid material can be metallic material or stupalith, also can be other any rigid materials that can realize goal of the invention.
Preferably, the cylindrical of described packing washer and described flap and the inner circle Spielpassung of described valve pocket.
Packing washer of the present invention can by being also other any connecting mode that can realize packing washer press seal circle with flap scyewed joint, and packing washer can make a part, also can make two or more independently part combination respectively.
On the upper-end surface that described equalizing orifice can be arranged on described flap or described valve rod.
Preferably, described valve body is provided with valve seat, is combined by sealing gasket between valve seat and valve body, be convenient to the maintenance of valve seat, replacing.
Described valve seat is provided with the primary sealing area with described flap gluing, sealing, its shape is plane, conical surface or sphere.
Described flap is provided with the secondary sealing area with described valve seat gluing, sealing, its shape is plane, conical surface or sphere.
The present invention compared with prior art, its beneficial effect is: 1, the pressure self-sealing structure of High Temperature High Pressure self balancing modulating valve of the present invention, adopt low density, high temperature resistant or corrosion resistant sealing material, such as Expanded graphite etc., also the pressure self-sealing characteristic of " O " type that is similar to, " Y " RunddichtringO can be obtained, make it have lasting airtight quality and sealing life reliably, especially for up under the high temperature and high pressure environment of 650 DEG C, still there is the complete cutting function of medium that prior art pressure self-balancing modulating valve cannot realize; Meanwhile, by pulling flap to open valve pocket flow regulating orifices circumferentially to regulate rate-of flow, the Flow-rate adjustment under high-temperature and high-pressure conditions can be realized simultaneously and cut off completely; 2, High Temperature High Pressure self balancing modulating valve of the present invention, makes the pressure medium self balancing that flap bears, and significantly reduces energy consumption that is electronic, Pneumatic actuator, is specially adapted to the Flow-rate adjustment of big orifice pipeline high-temperature high-pressure medium; 3, adopt different materials to make, various high temperature, high pressure and Korrosionsmedium pipeline can be widely used in.The present invention is by a large amount of High Temperature High Pressure sealabilities and failtests, and the practical application test of high-temperature and pressure pipeline shows, the present invention has fairly obvious technical advantage compared with existing valve, has very broad prospect of application.
Accompanying drawing explanation
Fig. 1 is the structural representation of High Temperature High Pressure self balancing modulating valve of the present invention.
Fig. 2 is the pretightening force schematic diagram of seal ring.
Fig. 3 is the pressure medium selfsealings schematic diagram of seal ring.
Embodiment
Below technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:as shown in Figure 1, High Temperature High Pressure self balancing modulating valve of the present invention, comprises valve body 1, flap 4, valve pocket 10, packing washer 9, seal ring 8, valve gap 11, valve rod 13 and equalizing orifice 15; Be provided with upper channel 3, lower channel 22 and internal channel 24 in valve body 1, the upper-end surface of internal channel 24 is provided with the primary sealing area 2 that valve seat 21 seals with described flap 4, and its shape is plane, conical surface or sphere; Described flap 4 is arranged in described valve pocket 10; The lower end surface 23 of flap 4 is provided with the secondary sealing area 20 sealed with described valve seat 21, and its shape is plane, conical surface or sphere; Described valve pocket 10 is arranged in the cavity 7 of valve body 1, the adjustment hole 5 being circumferentially provided with adjust flux of described valve pocket 10 bottom; Described packing washer 9 is threaded connection the top being arranged on described flap 4; Described seal ring 8 is arranged in the annular groove that forms between described flap 4 and the internal circular surfaces 6 of described packing washer 9 and described valve pocket 10; Described valve gap 11 is fixedly connected with described valve body 1; Described valve rod 13 is through described valve gap 11, and its underpart and described flap 4 are actively coupled, and valve rod 13 can carry flap 4 and move up and down in valve pocket 10, form Flow-rate adjustment of the present invention or throttle down; Described equalizing orifice 15 is arranged on described flap 4 or described valve rod 13, makes valve body 1 lower channel 22 be placed in below flap 4 lower end surface 23 connect chamber 12 with the valve body 1 be placed in above flap 4 upper-end surface 14, valve gap 11 and links up; Described seal ring 8 adopts sealing material to make, and can adopt different sealing materials as required, and the present embodiment is in order to reach resistant to elevated temperatures object, and the sealing material of employing is Expanded graphite; Described packing washer 9 adopts metallic material to make, and bottom the lower end surface 16 of packing washer 9 and described flap 4 annular groove, the shape of 19 is extrude the conical surface of described seal ring 8, inclined-plane or sphere to valve pocket 10 inner circle 6 direction.
By screwing packing washer 9, extruding force N is applied to seal ring
extruding force, make 19 common outwards crush seal circles 8 bottom the lower end surface 16 of packing washer 9 and flap 4 annular groove, under the stop of valve pocket internal circular surfaces, make the outer round surface 17 of seal ring 8 obtain the seal preload N larger compared with its internal circular surfaces 18
seal preload, and the sealed extruded power N ' that 19 acquisitions are enough bottom flap 4 annular groove
extruding force, the medium channel that the medium infiltrating seal ring 8 internal circular surfaces 18 flows out bottom flap 4 annular groove 19 can be blocked reliably.The pretightening force schematic diagram of seal ring 8 as shown in Figure 2.
Packing washer 9 can by being arranged on flap 4 with flap 4 scyewed joint or other mode that can extrude seal ring 8, and packing washer 9 can make a part, also can make multiple independently part combination.
Working principle of the present invention is as follows: after modulating valve of the present invention connects with pressure piping, medium enters from valve body lower channel, while pressure medium acts on the lower end surface of flap, be passed to valve body by equalizing orifice set on flap or valve rod again, valve gap connects chamber and act on the upper-end surface of flap, axis along flap forms the axial force that a pair direction is contrary, cancel out each other, and achieves the pressure medium self balancing to flap.When the present invention is in adjustment state, along with the flap that pulls of valve rod is mentioned gradually, be arranged on valve pocket adjust flux adjustment hole to be circumferentially opened gradually, rate-of flow becomes large gradually until reach the flow value of operating mode needs, when valve is opened completely, rate-of flow reaches maximum value, when needs cut off flowing medium completely, flap moves down gradually under the promotion of valve rod, seals until valve clack sealing surface and sealing surface of seat are adjacent to form.
Below by the present invention's regulation the MEDIA FLOW entered from valve body lower channel to, describe the pressure medium selfsealings principle of modulating valve seal ring of the present invention in detail:
When pressure medium enters from valve body lower channel, pressure medium selfsealings principle as shown in Figure 3:
Pressure medium is passed to valve body, valve gap connection chamber by equalizing orifice set on flap or valve rod, the internal circular surfaces of the less seal ring of pretightening force is infiltrated again, because the sealing blocked force formed bottom flap annular groove is longitudinally N along the gap between packing washer and flap
extruding forcewith N
pressure mediumsummation, the medium infiltrating seal ring internal circular surfaces can be blocked reliably and flow out medium channel bottom flap annular groove.The pressure medium infiltrating seal ring internal circular surfaces is forced to form extruding to the internal circular surfaces of seal ring, i.e. horizontal N
pressure medium, and force the outer round surface of seal ring and the internal circular surfaces of valve pocket to be adjacent to further, form seal ring to the pressure self-sealing of valve pocket.
The outer round surface of seal ring of the present invention is to the sealing force of the internal circular surfaces of valve pocket, mainly form extruding by pressure medium at the internal circular surfaces of seal ring, and then between the cylindrical and the internal circular surfaces of valve pocket of seal ring, form medium be adjacent to power, the selfsealings power formed by pressure medium self because this medium is adjacent to power, and it is further reliable along with the rising of pressure medium, resistant to elevated temperatures low density sealing material is possessed and is similar to " O " type, the pressure medium self-sealing characteristics of " Y " RunddichtringO, its seal degree does not decline with the wearing and tearing of seal ring, therefore, the present invention is not by simply arranging part and Sealing carries out extruding to realize sealing, the present invention only need by suitably screwing packing washer, the cylindrical of seal ring and the internal circular surfaces of valve pocket obtain the seal preload much smaller than pressure medium, just can obtain lasting airtight quality and sealing life reliably.
The present invention tests valve: latus rectum DN100mm, valves test pressure P N63.0MPa, on November 24th, 2013 by " national pump valve products quality supervision inspection center " Hefei general valve seal Performance Detection, testing result is zero leakage.
As mentioned above, although represented with reference to specific preferred embodiment and described the present invention, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (6)
1. a High Temperature High Pressure self balancing modulating valve, comprises valve body (1), flap (4), packing washer (9), seal ring (8), valve gap (11), valve rod (13) and equalizing orifice (15); It is characterized in that: also comprise valve pocket (10), described flap (4) is arranged in described valve pocket (10); Described valve pocket (10) is arranged in the cavity (7) of described valve body (1); Described valve pocket (10) bottom be circumferentially provided with flow regulating orifices (5); Described packing washer (9) is arranged between the top of described flap (4) and described valve pocket (10), the cylindrical of described packing washer (9) and described flap (4) and inner circle (6) Spielpassung of described valve pocket (10); Described seal ring (8) is arranged in the annular groove that forms between inner circle (6) surface of described flap (4) and described packing washer (9) and described valve pocket (10); Described seal ring (8) is made up of high temperature resistant or corrosion resistant sealing material, and described high temperature resistant or corrosion resistant sealing material is flexible graphite material or polytetrafluoroethylmaterial material; Bottom the lower end surface (16) of described packing washer (9) and described flap (4) annular groove, the shape of (19) is extrude the conical surface of described seal ring (8), inclined-plane or sphere to described valve pocket (10) inner circle (6) direction; Described valve gap (11) and described valve body (1) are fixedly connected; Described valve rod (13) is through described valve gap (11), and its underpart and described flap (4) are actively coupled.
2. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: described packing washer (9) is by one or more part combination.
3. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: on the upper-end surface that described equalizing orifice (15) is arranged on described flap (4) or described valve rod (13).
4. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: described valve body (1) is provided with valve seat (21), is combined or with as a whole between described valve seat (21) and valve body (1) by sealing gasket.
5. High Temperature High Pressure self balancing modulating valve according to claim 4, is characterized in that: described valve seat (21) is provided with the primary sealing area (2) with described flap (4) gluing, sealing, its shape is plane, conical surface or sphere.
6. High Temperature High Pressure self balancing modulating valve according to claim 4, is characterized in that: described flap (4) is provided with the secondary sealing area (20) with described valve seat (21) gluing, sealing, its shape is plane, conical surface or sphere.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410038107.5A CN103727254B (en) | 2014-01-26 | 2014-01-26 | A kind of High Temperature High Pressure self balancing modulating valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410038107.5A CN103727254B (en) | 2014-01-26 | 2014-01-26 | A kind of High Temperature High Pressure self balancing modulating valve |
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| CN103727254A CN103727254A (en) | 2014-04-16 |
| CN103727254B true CN103727254B (en) | 2016-02-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134989A (en) * | 2015-08-24 | 2015-12-09 | 河南省中原大化集团有限责任公司 | Novel double-flow-direction cut-off regulating valve sealing device and application method |
| CN110094513B (en) * | 2018-01-31 | 2022-12-16 | 浙江三花商用制冷有限公司 | Electric valve |
| CN110094524B (en) * | 2018-01-31 | 2022-12-20 | 浙江三花商用制冷有限公司 | Electric valve |
| CN109469765A (en) * | 2018-03-26 | 2019-03-15 | 冯光 | Antiscour high-differential-pressure regulating valve self-sealing work valve seat |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
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| CN101806363A (en) * | 2010-04-30 | 2010-08-18 | 南京理工大学 | High-pressure high-temperature two-way balance stop valve |
| CN202381720U (en) * | 2011-08-25 | 2012-08-15 | 周君 | Unidirectional pressure self-balance stop valve |
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| CN203730808U (en) * | 2014-01-26 | 2014-07-23 | 周君 | High-temperature and high-pressure self-balancing control valve |
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| SE524115C2 (en) * | 2002-04-30 | 2004-06-29 | Cci Valve Technology Ab | Valve for pressure and flow control of a gas or liquid |
| CN201547254U (en) * | 2009-12-11 | 2010-08-11 | 天津精通控制仪表技术有限公司 | High-pressure cage adjusting valve |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806363A (en) * | 2010-04-30 | 2010-08-18 | 南京理工大学 | High-pressure high-temperature two-way balance stop valve |
| CN202381720U (en) * | 2011-08-25 | 2012-08-15 | 周君 | Unidirectional pressure self-balance stop valve |
| CN202867871U (en) * | 2012-11-22 | 2013-04-10 | 浙江贝尔控制阀门有限公司 | High-temperature high-pressure corrugated-pipe adjusting valve |
| CN202914778U (en) * | 2012-11-22 | 2013-05-01 | 浙江贝尔控制阀门有限公司 | High temperature sleeve adjustment valve |
| CN203730808U (en) * | 2014-01-26 | 2014-07-23 | 周君 | High-temperature and high-pressure self-balancing control valve |
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