CN203730808U - High-temperature and high-pressure self-balancing control valve - Google Patents
High-temperature and high-pressure self-balancing control valve Download PDFInfo
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- CN203730808U CN203730808U CN201420050270.9U CN201420050270U CN203730808U CN 203730808 U CN203730808 U CN 203730808U CN 201420050270 U CN201420050270 U CN 201420050270U CN 203730808 U CN203730808 U CN 203730808U
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- valve
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- high temperature
- packing washer
- pressure self
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Abstract
The utility model discloses a high-temperature and high-pressure self-balancing control valve which comprises a valve body, a valve clack, a valve sleeve, a packing washer, a sealing ring, a valve deck, a valve rod and a balancing hole. The valve clack is arranged in the valve sleeve arranged in a cavity of the valve body. An adjusting hole used for adjusting flow is formed in the circumference of the lower portion of the valve sleeve. The packing washer is arranged between the upper portion of the valve clack and the valve sleeve. The valve deck is fixedly connected with the valve body. The valve rod penetrates through the valve deck, and the lower end portion of the valve rod is movably connected with the valve clack. The sealing ring is arranged in an annular groove formed among the valve clack, the packing washer and the valve sleeve. The lower end face of the packing washer and the bottom of the annular groove of the valve clack are of circular conical surface shapes or slope shapes or spherical surfaces extruding the sealing ring towards the inner circle direction of the valve sleeve. The flow adjusting hole in the circumference of the valve sleeve can be opened by pulling the valve clack to adjust the medium flow, and adjusting and complete cutting off of the flow under the high-temperature and high-pressure conditions can be achieved at the same time.
Description
Technical field
The present invention relates to a kind of valve, relate in particular to one and be applicable under 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 important flow control valve on petrochemical industry, oil field, metallurgy, thermoelectricity plant's equal pressure pipeline, and in the time that valve is used for high temperature, high pressure and large drift diameter pipeline, must overcome the pressure medium bearing on open-shut device could operated valve.
Pressure self-balancing modulating valve can pass through pressure self-balancing principle, makes to act on the pressure medium self balancing on open-shut device, has become the main direction of studying of existing large latus rectum high-temperature high-pressure regulating valve.Existing pressure self-balancing modulating valve, conventionally adopt the seal rings such as " O " type, " Y " type to seal, because such seal ring can utilize the pressure self-sealing of pressure medium to seal ring formation, make the seal degree of seal ring and the height of pressure medium irrelevant, the size of the seal preload during also with installation seal ring is irrelevant, its seal degree does not change with the decline that causes 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 at present the seal rings such as making " O " type, " Y " type is rubber, the plastic or other material of non-refractory.Due to the restriction of sealing ring material, when pressure self-balancing modulating valve is following for 200 DEG C, not only can carry out Flow-rate adjustment, 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 discovery, some low-density sealing materials have high temperature resistant, corrosion resistant performance.For example, Expanded graphite is exactly a kind of loose low density exotic material, under high temperature, high pressure or radiation condition, works, do not decompose, 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 rings such as making " O " type, " Y " type.Inventor, in the patent (CN 2637835Y) of application in 2003 can resistant to elevated temperatures pressure self-balancing stop valve, is applied to self-balance stop valve using high-temperature-resistant flexible graphite as sealing material, solves the resistant to elevated temperatures problem of sealing material.In this patent, valve adopts the high temperature sealing materials such as Expanded graphite to make seal ring, and makes up the low density problem of such high temperature sealing material by the method for pressure ring press seal circle is set, and 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, seal ring places one's entire reliance upon pressure ring to the rear seal preload producing of seal ring compression to the seal degree of flap, in using process, its seal degree can be along with the wearing and tearing of flap to seal ring and decline, and 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 following technical characteristics is disclosed (referring to chemical fertilizer industry, the 2nd phase in 1989, the 39th page of right hurdle the 11st walked to the 24th row, new structure stop valve schematic diagram): in valve, be provided with successively Gland, filler, pad from top to bottom, can make Gland and pad co-extrusion filler by screwing the handwheel of 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.In this article, mention,, by Gland is set, filler is applied to impacting force, obtain the sealing of filler to valve head bar portion, and be sphere by the surface of contact that adopts Gland and filler, carry out the impacting force of reinforcing filler to valve head bar portion, thereby further improve the sealing of filler inner circle to 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 the wearing and tearing of valve head bar portion to filler inner circle in using process, must cause the seal preload of the inside and outside circle of filler to decline, when seal preload is during lower than pressure medium thereupon, leak and occur in immediately between the cylindrical and stuffing box of the relatively low filler of seal preload, and flow out between the cylindrical of Gland and stuffing box.In this article, also mention: " filler have within one or two months, all need not compress ", the stop valve of mentioning in this article as can be seen here not only sealing life short, and must repeatedly and timely compress filler and could keep the sealing to valve head, in this article, disclosed technological scheme 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 has fundamentally solved 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 blocking or opening of high temperature, high pressure pipe line of more than 650 DEG C one-way flow medium.But this product cannot be realized the adjusting 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, a kind of long service life is provided, there is Flow-rate adjustment and the complete High Temperature High Pressure self balancing modulating valve of 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, and the circumference of valve pocket bottom is provided with Flow-rate adjustment hole; Packing washer is arranged between the top and described valve pocket of flap; Seal ring is arranged in the annular groove forming 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; The lower end surface of packing washer and described flap annular groove bottom be shaped as the conical surface from described seal ring to circular direction in valve pocket, inclined-plane or the sphere that push; Valve gap and valve body are fixedly connected; Valve rod is through valve gap, and its underpart and flap are actively coupled.
When work, by the common outwards crush seal circle in underpart and flap annular groove bottom of packing washer, under the stopping of valve pocket internal circular surfaces, make seal ring with outer surface obtain the seal preload larger compared with its internal circular surfaces, and obtain enough sealed extruded power in flap annular groove bottom, can block reliably the medium channel of the medium outflow flap annular groove bottom of infiltrating seal ring internal circular surfaces.Along with the flap that pulls of valve rod is mentioned gradually, the Flow-rate adjustment hole being arranged on valve pocket circumference is opened gradually, rate-of flow becomes large gradually until reach the flow value that operating mode needs, when valve is opened completely, rate-of flow reaches maximum value, in the time that needs cut off flowing medium completely, flap moves down gradually under the promotion of valve rod, forms sealing until valve clack sealing surface and sealing surface of seat are adjacent to.
High temperature sealing material of the present invention is preferably flexible graphite material, corrosion-resistant sealing material is preferably polytetrafluoroethylmaterial material, along with scientific and technological progress, 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, can be also other any rigid materials that can realize goal of the invention.
Preferably, the inner circle Spielpassung of the cylindrical of described packing washer and described flap and described valve pocket.
Packing washer of the present invention can be by also can be for other any connecting mode that can realize packing washer press seal circle with flap scyewed joint, and packing washer can be made a part, also can make respectively two or more independently parts combinations.
Described equalizing orifice can be arranged on the upper-end surface or described valve rod of described flap.
Preferably, on described valve body, be provided with valve seat, between valve seat and valve body, combine by sealing gasket, be convenient to maintenance, the replacing of valve seat.
On described valve seat, be provided with and the primary sealing area of described flap gluing, sealing, it is shaped as plane, conical surface or sphere.
On described flap, be provided with and the secondary sealing area of described valve seat gluing, sealing, it is shaped as 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 can obtain the pressure self-sealing characteristic of " O " type that is similar to, " Y " RunddichtringO, make it have lasting airtight quality and sealing life reliably, under the high temperature and high pressure environment up to 650 DEG C, still there is the complete cutting function of medium that prior art pressure self-balancing modulating valve cannot be realized; Meanwhile, can regulate rate-of flow by the Flow-rate adjustment hole that pulls flap to open on valve pocket circumference, can realize the Flow-rate adjustment under high-temperature and high-pressure conditions simultaneously and cut off completely; 2, High Temperature High Pressure self balancing modulating valve of the present invention, makes the pressure medium self balancing of bearing on flap, has significantly reduced energy consumption electronic, Pneumatic actuator, is specially adapted to the Flow-rate adjustment of large drift diameter pipeline high-temperature high-pressure medium; 3, adopt different materials to make, can be widely used in various high temperature, high pressure and Korrosionsmedium pipeline.The present invention is by a large amount of High Temperature High Pressure sealability and failtests, and the practical application of high-temperature and pressure pipeline test shows, the present invention has fairly obvious technical advantage compared with existing valve, has very broad prospect of application.
Brief description of the drawings
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 elaborated, 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; In valve body 1, be provided with upper channel 3, lower channel 22 and internal channel 24, be provided with the primary sealing area 2 that valve seat 21 and described flap 4 seal on the upper-end surface of internal channel 24, it is shaped as 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 sealing with described valve seat 21, and it is shaped as plane, conical surface or sphere; Described valve pocket 10 is arranged in the cavity 7 of valve body 1, and the circumference of described valve pocket 10 bottoms is provided with the adjustment hole 5 of adjust flux; Described packing washer 9 is threaded connection the top that is arranged on described flap 4; Described seal ring 8 is arranged in the annular groove forming 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 portability flaps 4 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, and valve body 1 lower channel 22 that makes to be placed in 23 belows, flap 4 lower end surface connects chamber 12 with the valve body 1, the valve gap 11 that are placed in 14 tops, flap 4 upper-end surface and links up; Described seal ring 8 adopts sealing material to make, and can adopt as required different sealing materials, 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, the lower end surface 16 of packing washer 9 and described flap 4 annular grooves bottoms 19 be shaped as the conical surface from described seal ring 8 to valve pocket 10 inner circle 6 directions, inclined-plane or the sphere that push.
By screwing packing washer 9, seal ring is applied to extruding force N
extruding force, make the lower end surface 16 of packing washer 9 and the flap 4 common outwards crush seal circles 8 in annular grooves bottom 19, under the stopping 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 obtain enough sealed extruded power N ' in flap 4 annular groove bottoms 19
extruding force, can block reliably the medium channel of the medium outflow flap 4 annular grooves bottoms 19 of infiltrating seal ring 8 internal circular surfaces 18.The pretightening force schematic diagram of seal ring 8 as shown in Figure 2.
Packing washer 9 can be by being arranged on flap 4 with flap 4 scyewed joint or other mode that can push seal ring 8, and packing washer 9 can be made a part, also can make multiple independently part combinations.
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, when pressure medium acts on the lower end surface of flap, be passed to by set equalizing orifice on flap or valve rod the upper-end surface that valve body, valve gap connect chamber and act on flap again, along a pair of opposite direction of axial formation of flap, the axial force of cancelling out each other, realize the pressure medium self balancing to flap.The present invention is in the time of adjustment state, along with the flap that pulls of valve rod is mentioned gradually, the adjust flux adjustment hole being arranged on valve pocket circumference is opened gradually, rate-of flow becomes large gradually until reach the flow value that operating mode needs, when valve is opened completely, rate-of flow reaches maximum value, in the time that needs cut off flowing medium completely, flap moves down gradually under the promotion of valve rod, forms sealing until valve clack sealing surface and sealing surface of seat are adjacent to.
Below by the MEDIA FLOW entering from valve body lower channel of the present invention regulation to, describe the pressure medium selfsealings principle of modulating valve seal ring of the present invention in detail:
In the time that 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 set equalizing orifice on flap or valve rod, infiltrate again the internal circular surfaces of the seal ring that pretightening force is less along gap between packing washer and flap, because the sealing blocked force forming in flap annular groove bottom is N longitudinally
extruding forcewith N
pressure mediumsummation, can block reliably the medium that infiltrates seal ring internal circular surfaces and flow out the medium channel of flap annular groove bottom.Force the pressure medium that infiltrates seal ring internal circular surfaces 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 further adjacent to, form the pressure self-sealing of seal ring to valve pocket.
The sealing force of the internal circular surfaces of the outer round surface of seal ring of the present invention to valve pocket, mainly to form extruding by pressure medium at the internal circular surfaces of seal ring, and then between the cylindrical of seal ring and the internal circular surfaces of valve pocket, form medium and be adjacent to power, the selfsealings power being formed by pressure medium self because this medium is adjacent to power, and further reliable along with the rising of pressure medium, resistant to elevated temperatures low density sealing material is possessed and be similar to " O " type, the pressure medium selfsealings characteristic of " Y " RunddichtringO, its seal degree does not decline with the wearing and tearing of seal ring, therefore, the present invention pushes to realize sealing by part and Sealing are simply set, the present invention only need be by suitably screwing packing washer, on 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 and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.
Claims (8)
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); On the circumference of described valve pocket (10) bottom, be provided with Flow-rate adjustment hole (5); Described packing washer (9) is arranged between the top and described valve pocket (10) of described flap (4); Described seal ring (8) is arranged in the annular groove forming between described flap (4) and the internal circular surfaces (6) of 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; The lower end surface (16) of described packing washer (9) and described flap (4) annular groove bottom (19) be shaped as the conical surface from described seal ring (8) to the interior circular direction of described valve pocket (10), inclined-plane or the sphere that push; 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.
2. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: described high temperature resistant or corrosion resistant sealing material is flexible graphite material or polytetrafluoroethylmaterial material.
3. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: inner circle (6) Spielpassung of the cylindrical of described packing washer (9) and described flap (4) and described valve pocket (10).
4. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: described packing washer (9) is combined by one or more parts.
5. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: described equalizing orifice (15) is arranged on the upper-end surface or described valve rod (13) of described flap (4).
6. High Temperature High Pressure self balancing modulating valve according to claim 1, is characterized in that: on described valve body (1), be provided with valve seat (21), combine or with as a whole between described valve seat (21) and valve body (1) by sealing gasket.
7. High Temperature High Pressure self balancing modulating valve according to claim 6, is characterized in that: on described valve seat (21), be provided with and the primary sealing area (2) of described flap (4) gluing, sealing, it is shaped as plane, conical surface or sphere.
8. High Temperature High Pressure self balancing modulating valve according to claim 6, is characterized in that: on described flap (4), be provided with and the secondary sealing area (20) of described valve seat (21) gluing, sealing, it is shaped as plane, conical surface or sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050270.9U CN203730808U (en) | 2014-01-26 | 2014-01-26 | High-temperature and high-pressure self-balancing control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050270.9U CN203730808U (en) | 2014-01-26 | 2014-01-26 | High-temperature and high-pressure self-balancing control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730808U true CN203730808U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050270.9U Expired - Fee Related CN203730808U (en) | 2014-01-26 | 2014-01-26 | High-temperature and high-pressure self-balancing control valve |
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| CN (1) | CN203730808U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727254A (en) * | 2014-01-26 | 2014-04-16 | 周君 | High-temperature high-pressure self-balanced regulating valve |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN109099166A (en) * | 2018-10-19 | 2018-12-28 | 江苏高特阀业有限公司 | A kind of big pressure-difference valve of high temperature and pressure |
-
2014
- 2014-01-26 CN CN201420050270.9U patent/CN203730808U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727254A (en) * | 2014-01-26 | 2014-04-16 | 周君 | High-temperature high-pressure self-balanced regulating valve |
| CN103727254B (en) * | 2014-01-26 | 2016-02-03 | 周君 | A kind of High Temperature High Pressure self balancing modulating valve |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN109099166A (en) * | 2018-10-19 | 2018-12-28 | 江苏高特阀业有限公司 | A kind of big pressure-difference valve of high temperature and pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20210126 |