CN101625043B - high-pressure reducing valve - Google Patents
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- CN101625043B CN101625043B CN2009103055838A CN200910305583A CN101625043B CN 101625043 B CN101625043 B CN 101625043B CN 2009103055838 A CN2009103055838 A CN 2009103055838A CN 200910305583 A CN200910305583 A CN 200910305583A CN 101625043 B CN101625043 B CN 101625043B
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Abstract
The invention relates to a high-pressure reducing valve. A throttling hole which is communicated with an air inlet cavity and an air outlet cavity and a valve core which axially and movably penetrates through the throttling hole are arranged in a valve seat; the valve core is provided with a throttling conical surface which is in movable and sealing fit with a lower hole opening of the throttling hole in the air inlet cavity; the upper end of the valve core supports against a piston in a matching mode; the lower end of the valve core is elastically assembled in the valve body through an offsetting spring; the throttling conical surface of the valve core is axially arranged at the middle part of the air inlet cavity just opposite to the an air inlet; the lower end of the valve core is provided with a lower valve post which is assembled in the valve seat in a sliding and sealing mode; and the diameter of the lower valve post is equal to the aperture of the throttling hole of the valve seat. In the invention, the diameter of the lower valve post is equal to the aperture of the throttling hole of the valve seat so that an axial action force of inlet pressure acting on the valve core is zero so as to eliminate the influence of the fluctuation of inlet pressure on outlet pressure and improve the pressure stabilizing precision.
Description
Technical field
The present invention relates to a kind of high-pressure pressure-reducing valve.
Background technique
In gas control system, reduction valve is the key element in the atmospheric control, and nearly all atmospheric control all will be used reduction valve, and the effect of reduction valve is that the upstream inlet high pressure is reduced to the required pressure output of lower exit, uses very extensive.Existing high pressure direct acting pressure, its air-inlet cavity is communicated with the bottom of spool, the lower end surface of spool is subjected to the axial force that air inlet air pressure and Returnning spring make progress jointly simultaneously, the upper end of the spool axial force under pressing to that is subjected to working off one's feeling vent one's spleen, being delivered on the piston by spool with joint efforts of these three power, make piston be subjected to active force upwards, simultaneously piston also is subjected to the active force of working off one's feeling vent one's spleen and pressing to, and these two act on the downward active force that upwards active force on the piston and pressure adjusting spring act on the piston and balance each other.When the restriction of air inlet air pressure stream through spool and valve seat formation, because the expenditure and pressure effect of restriction, an outlet pressure output that is lower than inlet pressure is arranged, and when a certain reason caused that outlet pressure changes, the variation of outlet pressure fed back on the piston, the stress balance of piston changes, piston is moved, and spool moves with piston under the effect of Returnning spring, the mobile orifice size that changed of spool, make the outlet pressure inverse change, thereby make outlet return to set pressure.Regulate adjusting pressuring knob, change the decrement of pressure adjusting spring, just can change the reduction valve outlet pressure.Be found in disclosed a kind of high-pressure pressure-reducing valve among the Chinese patent CN2789543Y with the similar document of above-mentioned structure of relief pressure valve, all there is following problem in high-pressure pressure-reducing valve of the prior art:
1. when the inlet pressure fluctuation was big, the inlet pressure fluctuation was delivered on the piston by the power that acts on the spool, made piston drive spool and moved together, had changed the orifice size of restriction, and outlet pressure is changed, and influenced the stable of outlet pressure.
2. when the outlet pressure of reduction valve is had relatively high expectations, piston and pressure adjusting spring difficult design, the rigidity of pressure adjusting spring is very hard, makes the outlet pressure fluctuation bigger, and the precision of voltage regulation is low; Pressure adjusting spring boundary dimension is huge, and when rotating adjusting pressuring knob, not only regulating wastes time and energy, and makes whole reduction valve overall volume, weight bigger, be not suitable for requiring precision of voltage regulation height, highly sensitive, volume is little, lightweight working environment.
3. at the initialization state, reduction valve import moment connection high-pressure air source exports the pressure peak that can produce far above setting pressure, and this high-pressure peak might injure the bigger impact of system's generation in outlet downstream.
And existing high-pressure high-flow reduction valve is bulky mostly, and the precision of voltage regulation is low, and adjusting is wasted time and energy.More inapplicable to volume, weight requirement restriction, simultaneously to pressure, flow, the high use occasion of pressure regulation required precision.
Summary of the invention
The purpose of this invention is to provide a kind of high-pressure pressure-reducing valve that upstream and downstream pressure influence is little, the precision of voltage regulation is higher that is subjected to.
For achieving the above object, the present invention adopts following technological scheme: a kind of high-pressure pressure-reducing valve, comprise and having into, the valve body of air outlet, valve body top is provided with piston and spring regulator, valve body lower portion is provided with valve seat, be in the air-inlet cavity of valve seat below, be in the outlet chamber between valve seat and the piston bottom end, be provided with the throttle orifice that is communicated with air-inlet cavity and outlet chamber and axial activity in the valve seat and be located in spool in the throttle orifice, in air-inlet cavity, be provided with the throttling conical surface that cooperates with the following aperture movable sealing of throttle orifice on the spool, top, spool upper end fits on the piston, the spool lower end is assemblied in the valve body by Returnning spring elasticity, the throttling conical surface of described spool is located at the air-inlet cavity middle part over against suction port in the axial direction, the spool lower end has slipper seal and is assemblied in lower valve column in the valve seat, and the diameter of lower valve column equates with the aperture of valve seat throttle orifice.
Described valve body bottom is provided with the lower valve chamber of the lower valve column insertion that supplies spool that communicates with the air outlet, the logical valve rod mounting hole that cooperates with the lower valve column slipper seal of spool that is provided with between lower valve chamber and the air-inlet cavity, described Returnning spring top are contained in bottom the lower valve chamber and between the lower valve column bottom.
Described lower valve column is provided with the multiple tracks annular groove with the cylinder that the slipper seal of valve rod mounting hole cooperates.
Axially offer the overflow through hole that the upper end communicates with ambient atmosphere, the lower end communicates with outlet chamber in the described piston, described spool upper end is provided with the spheric structure that is sealed and matched with the following aperture of overflow through hole when roof pressure contacts.Described piston lower end is provided with nonmetal overflow seat, and the following aperture of described overflow through hole is opened in the lower end surface of nonmetal overflow seat.
The piston mounting hole slipper seal of corresponding setting cooperates in described piston and the valve body, and piston is provided with the O type circle that is sealed and matched with the piston mounting hole, and the piston of O type circle below offers at least three road circular grooves.
Logically between air outlet and ambient atmosphere in the described valve body be provided with safe overflow ducts, be provided with safe overflow mechanism in the safe overflow ducts.
Described safe overflow mechanism comprises the look nut that is bolted in the safe overflow ducts, is contained in the steel ball that ball seat on the look nut and top are assigned in corresponding seal orifice place in ball seat and the safe overflow ducts by the safety spring top, and described ball seat and steel ball are located at a side of the close air outlet of look nut.
Be bolted with the top in the safe overflow ducts of described look nut away from a side of air outlet and debug the locking nut of pressing on the nut.
Described spring regulator comprises adjusting pressuring knob and the pressure adjusting spring of roof pressure between adjusting pressuring knob and piston head that the valve body top is provided with, described pressure adjusting spring is connected between pressure adjusting spring seat and the piston seat at two ends up and down, rotate assembling, piston seat lower end and piston head press fit by thrust ball bearing between described adjusting pressuring knob lower end and the pressure adjusting spring seat.
The end face of described piston upper end is a sphere, and the piston seat lower end is provided with the sphere line contact matching of taper hole face and piston upper end.
Described valve body is to be connected and composed by upper and lower two-part valve seal, be located in the upper valve body on described piston and the spring regulator, valve seat is located at down in the valve body, described outlet chamber is located between the opposing end surface of upper and lower valve inner, and upper and lower valve body has the adjustment pad near support assemblies between the opposing end surface of outer surface.
High-pressure pressure-reducing valve provided by the invention, because the throttling conical surface of spool is located at the air-inlet cavity middle part over against suction port in the axial direction, inlet pressure can be acted on simultaneously from the above and below of the throttling spool conical surface, and the diameter of lower valve column equates with the aperture of valve seat throttle orifice, the useful area that makes inlet pressure act on throttling conical surface upper and lower equates, thereby the axial force that makes inlet pressure act on the spool is zero, can eliminate the influence of inlet pressure fluctuation, improve the precision of voltage regulation of this reduction valve outlet pressure.
In addition, the present invention is provided with the lower valve chamber that communicates with the air outlet at the place of plugging of spool lower valve column lower end, thereby make outlet pressure act on the top and bottom of spool simultaneously, when acting on the spool useful area in outlet pressure hour, the influence to the responsive to axial force on the spool in the time of can making the outlet pressure fluctuation drops to minimum.
Further, be provided with the overflow through hole in the piston of the present invention, and with being sealed and matched of spool top.This structure can allow small part gas be discharged to the outside of valve body by the overflow through hole when outlet pressure raises suddenly, and outlet pressure is descended rapidly, thereby reduces the influence of outlet pressure fluctuation to piston, the precision of voltage regulation and the voltage stabilizing sensitivity that improve valve.In addition, the limited area that this overflow through-hole structure makes outlet pressure act on the spool simultaneously is the aperture of overflow through hole and the sealing area of spool, thereby make inlet pressure active force upwards be arranged to spool, but because the overflow through-hole aperture is very little, this active force not quite and not can produce appreciable impact to spool.
In addition, the safe overflow mechanism that the present invention is installed additional in outlet, the one-way valve structures of this device for communicating with the external world, bleed off falls too high outlet pressure automatically, prevents the instantaneous too high infringement to down-stream system of outlet pressure.
In addition, the diameter of axle of piston of the present invention is provided with O type circle mounting groove, and the below of O type circle mounting groove offers at least three circular grooves, and circular groove makes the better to neutrality of piston, under the prerequisite that guarantees sealing, make the decrement of O type circle less, frictional force when helping reducing piston motion, the sphere of piston head contacts with the taper hole upper thread of piston seat bottom, makes that the diameter of piston is less, lighter weight, inertia is less, and frictional force is little, and motion flexibly; Simultaneously, reducing of piston area also makes the rigidity of pressure adjusting spring reduce, and helps improving the outlet pressure regulation precision and the sensitivity of reduction valve, accelerated speed of response.
In addition, be equiped with thrust ball bearing between the pressure regulating axis of pressure adjusting spring device of the present invention and the pressure adjusting spring seat, make pressure regulation more flexible, comparatively time saving and energy saving.
Further, valve body of the present invention is a valve body up and down, upper and lower valve body is by being threaded, contact end at upper and lower valve body is provided with the adjustment pad, can come the initial throttle window open area between regulating spool and the valve seat by the adjustment pad of changing different-thickness, so that satisfy different peak rate of flow demands.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the sectional view of A-A among Fig. 1.
Embodiment
As Fig. 1, shown in Figure 2, what arrow showed among the figure is gas flow direction, high-pressure pressure-reducing valve provided by the invention comprises by on being threaded, following valve body 7,14, be inserted with piston 9 by the slipper seal of piston mounting hole in the upper valve body 7, piston 9 tops are provided with the spring regulator, and the spring regulator comprises the adjusting pressuring knob 1 of spinning in upper valve body 7 tops, the pressure regulating axis 3 that is connected with adjusting pressuring knob 1, rotation is assemblied in the pressure adjusting spring seat 5 of pressure regulating axis 3 lower ends, be assemblied in the piston seat 8 on piston 9 tops, be mounted on the pressure adjusting spring 6 between pressure adjusting spring seat 5 and the piston seat 8.Be equiped with thrust ball bearing 4 between described pressure regulating axis 3 and the pressure adjusting spring seat 5, pressure adjusting spring 6 is connected between pressure adjusting spring seat 5 and the piston seat 8; The underpart build-in of piston 9 has nonmetal overflow seat 22, piston 9 axle center are provided with the overflow through hole, be processed with multiple tracks annular groove and seal with O ring device on piston 9 external diameters, annular groove makes the good to neutrality of piston 9, under the prerequisite that guarantees sealing, make the decrement of O type circle less, frictional force when helping reducing piston 9 motions, piston 9 external diameters match with piston mounting hole on the upper valve body 7, the sphere on piston 9 tops contacts with taper hole upper thread on the piston seat 8, this structural design can make the diameter of piston 9 less, light weight, inertia is little, frictional force is little, and motion flexibly.While is owing to piston area reducing, make that the design of pressure adjusting spring 6 is easy, spring rate is less, help improving outlet pressure regulation precision height, the raising sensitivity of reduction valve and improve speed of response, simultaneously because the dimensional structure of pressure adjusting spring 6 is little, make that the volume of whole reduction valve is little, light weight, compact structure.Piston seat 8 is being pressed under the effect of pressure adjusting spring 6 on the seat surface of upper valve body 7, and the upper end of pressure adjusting spring 6 is a pressure adjusting spring seat 5, between pressure adjusting spring seat 5 and pressure regulating axis 3 thrust ball bearing 3 is installed, and thrust ball bearing 3 makes pressure regulation flexible, and is time saving and energy saving.Adjusting pressuring knob 1 connects firmly with pressure regulating axis 3 is in the same place, and pressure regulating axis 3 and upper valve base 2 are adjusted the decrement of pressure adjusting spring 6 by the screw thread transmission.
Be provided with suction port in the following valve body 14, the air outlet and with advance, the air-inlet cavity that the air outlet is communicated with respectively, outlet chamber, the bottom of described piston 9 is located in the outlet chamber of top, between the outlet chamber of the air-inlet cavity of below and top, be provided with valve seat 12 in the following valve body 14, be provided with the logical air-inlet cavity of being located in the valve seat 12, throttle orifice between the outlet chamber, intert in the throttle orifice and be combined with spool 11, last valve rod and lower valve column 21 that spool 11 comprises the frustum structure that cooperates with the following aperture of throttle orifice and is connected the frustum top bottom, the throttling conical surface of frustum is located at the air-inlet cavity middle part over against suction port in the axial direction, the sharp edge cutting edge in aperture forms the throttle window mouth under the throttling conical surface of frustum and valve seat 12 throttle orifices, and valve rod top roof pressure is in the bottom of piston 9 and be in the outlet chamber on the spool 11.Spool 11 belows are provided with lower valve chamber and communicate with the air outlet, lower valve column 21 slipper seal insertings in the valve rod mounting hole of following valve body 14 and straight cutting go in the lower valve chamber.Lower valve column 21 diameters of axle equate with the aperture D size of the throttle orifice of valve seat 12, lower valve column 21 is the very little sliding fit of matching gap with the valve rod mounting hole, have a plurality of annular grooves on the diameter of axle of lower valve column 21, annular groove plays sealing and all pressure effects, clamping force and frictional force when moving to reduce lower valve column 21, make spool 11 motion flexibly, the axial force that the Returnning spring 13 that lower valve column 21 lower ends are subjected to assemble in the lower valve chamber makes progress.Because the upper and lower of spool 11 all communicates with outlet plenum, the axial force that this structure makes inlet pressure act on the spool 11 is zero.Outlet pressure acts on the spool 11, the axial force resultant direction of bottom upwards, the useful area that outlet air pressure acts on spool 11 is spool 11 top spheres and the sealing area that is mounted in the nonmetal overflow seat 22 contact aperture D0 formation on the piston 9, because overflow aperture D0 is very little, it is little that outlet pressure acts on the axial force that spool 11 makes progress, because between spool 11 and the following valve body 14 is the gap sliding fit, frictional force is very little with respect to the active force of Returnning spring 13, can ignore, spool 11 is subjected to the axial force that Returnning spring 13 and outlet air pressure make progress, and spool 11 top spheres are compressed on the hole in the nonmetal overflow seat 22 that is mounted on the piston 9.
Shown in 2, also be provided with the logical safe overflow ducts of being located between air outlet and the ambient atmosphere 20 on the following valve body 14, be provided with safe overflow mechanism in the safe overflow ducts.Described safe overflow mechanism comprises the look nut 16 that is bolted in the safe overflow ducts, is contained in the steel ball 19 that ball seat 18 on the look nut 16 and top are assigned in corresponding seal orifice place in ball seat 18 and the safe overflow ducts by safety spring 17 tops, and described ball seat 18 and steel ball 19 are located at a side of the close valve body air outlet of look nut 16.Be bolted with in the safe overflow ducts of described look nut 16 away from a side of valve body air outlet and push up the locking nut 15 that is contained on the look nut 16.This safe overflow mechanism in use, look nut 16 compressing secure springs 17, compressing secure spring 17 is pressed in down steel ball 19 on the throttling round platform of valve body by ball seat 18, play seal action, taper hole communicates with outlet, outlet air pressure acts on the steel ball 19, when outlet air pressure acts on the safety pressure that pressure that steel ball 19 is sets greater than safety spring 17, steel ball 19 is separated with the taper hole face by air pressure jack-up, air-flow comes out from the gap overflow between steel ball 19 and the taper hole face, makes outlet pressure reduce the force value that returns to setting rapidly.When look nut 16 was adjusted to suitable safety pressure, it was locking to tighten locking nut 15.
Be provided with between described upper and lower valve body 7, the 14 contact end faces and adjust pad 10.Valve body is when work, the sword limit, aperture of the conical surface of spool 11 and valve seat 12 throttle orifice lower end surfaces has formed the initial throttling window of a normal opening, this initial throttle window open area has determined the peak rate of flow of reduction valve, by changing the adjustment pad 10 of different-thickness, can regulating spool 11 and valve seat 12 between initial throttle window open area, to satisfy different peak rate of flow demands.
The reduction valve of the embodiment of the invention is when work, the pressure regulating axis 3 that turn and adjusting pressuring knob 1 connect firmly, by thrust ball bearing 4 and pressure adjusting spring seat 5 compression pressure adjusting springs 6, the active force of pressure adjusting spring 6 is delivered to by piston seat 8 on the seat surface of upper valve body 7, and the decrement of pressure adjusting spring 6 has determined the reduction valve outlet pressure.When the reduction valve import does not have the pressure input, Returnning spring 13 upwards pushes spool 11, by spool 11 active force is applied on the piston 9, the upper end sphere of piston 9 contacts with piston seat 8, because the active force that Returnning spring 13 acts on the piston seat 8 acts on active force on the piston seat 8 less than pressure adjusting spring 6, piston seat 8 can not move upward, at this moment the sword limit, aperture of the conical surface of spool 11 and lower end surface, valve seat 12 hole has formed the initial throttling window of a normal opening, this initial throttle window open area has determined the peak rate of flow of reduction valve, can change initial throttle window open area size by changing the thickness of adjusting pad 10, to satisfy the demand of different peak rate of flow.When the reduction valve import has the pressure input, inlet air flow flows into outlet by the throttling window, the pressure that outlet is set up raises gradually, when pressure that outlet pressure is set near pressure adjusting spring 6, when acting on Returnning spring 13 on the piston 9 upwards active force and outlet air pressure acting on upward pressure sum on piston 9 lower end surfaces greater than the downward active force of 6 pairs of pistons 9 of pressure adjusting spring, piston 9 moves up, this moment spool 11 under the active force of Returnning spring 13 along with piston 9 moves up, the throttle window open area reduces, the expenditure and pressure effect strengthens, when outlet pressure reaches the pressure of setting, the equilibrium of forces that piston 9 is subjected to up and down, piston 9 and spool 11 stop motions, outlet have a pressure stable output.When rate of discharge becomes big suddenly, when the throttle window open area does not change, outlet pressure must reduce, and at this moment the pressure that acts on the piston 9 of outlet pressure reduces, and pressure adjusting spring 6 presses pistons 9 to move down, piston 9 presses spool 11 to move down, the throttle window open area increases, and throttling action weakens, and outlet pressure is risen to some extent, return to the pressure of setting, the throttle window open area of increase also can satisfy the demand of augmented flow.In like manner, when rate of discharge reduced suddenly, reduction valve also can make delivery pressure keep stable.
Closely contact with overflow seat 22 on being mounted in piston 9 at the upper end sphere of the effect lower valve core 11 of Returnning spring 13, when outlet pressure raises suddenly, there is small part gas to be discharged to the outside of reduction valve by the inner aperture of overflow seat 22 and piston 9, outlet pressure is lowered rapidly, help improving the precision of voltage regulation and voltage stabilizing sensitivity.
In addition because the axial force that the inlet pressure of reduction valve acts on the spool 11 is zero, the fluctuation of inlet pressure can not be delivered on the sensing element piston 9, therefore can not exert an influence to outlet pressure, as long as inlet pressure greater than or a little more than outlet pressure, reduction valve just can well proper functioning, the range of regulation of this reduction valve is wide, and the highest outlet setting pressure is slightly less than inlet pressure.
Claims (12)
1. high-pressure pressure-reducing valve, comprise and having into, the valve body of air outlet, valve body top is provided with piston and spring regulator, valve body lower portion is provided with valve seat, be in the air-inlet cavity of valve seat below, be in the outlet chamber between valve seat and the piston bottom end, be provided with the throttle orifice that is communicated with air-inlet cavity and outlet chamber and axial activity in the valve seat and be located in spool in the throttle orifice, in air-inlet cavity, be provided with the throttling conical surface that cooperates with the following aperture movable sealing of throttle orifice on the spool, top, spool upper end fits on the piston, the spool lower end is assemblied in the valve body by Returnning spring elasticity, it is characterized in that: the throttling conical surface of described spool is located at the air-inlet cavity middle part over against suction port in the axial direction, spool upper end has activity and is arranged in last valve rod in the throttle orifice, thereby make the place, throttling conical surface place of spool form annular conical surface, the spool lower end has slipper seal and is assemblied in lower valve column in the valve body, thereby make being in of spool locate to form anchor ring under the throttling conical surface, the diameter of lower valve column equates with the aperture of valve seat throttle orifice, and what the annular conical surface of described spool and the anchor ring of spool were subjected to that gas pressure produces respectively upwards cancels out each other with downward axial force.
2. high-pressure pressure-reducing valve according to claim 1, it is characterized in that: described valve body bottom is provided with the lower valve chamber of the lower valve column insertion that supplies spool that communicates with the air outlet, be provided with the valve rod mounting hole that is communicated with lower valve chamber and air-inlet cavity between lower valve chamber and the air-inlet cavity, the valve rod mounting hole cooperates with the lower valve column slipper seal of spool, and described Returnning spring top is contained between lower valve chamber bottom and the lower valve column bottom.
3. high-pressure pressure-reducing valve according to claim 2 is characterized in that: described lower valve column is provided with the multiple tracks annular groove with the cylinder that the slipper seal of valve rod mounting hole cooperates.
4. high-pressure pressure-reducing valve according to claim 1, it is characterized in that: axially offer the overflow through hole that the upper end communicates with ambient atmosphere, the lower end communicates with outlet chamber in the described piston, described spool upper end is provided with the spheric structure that is sealed and matched with the following aperture of overflow through hole when roof pressure contacts.
5. high-pressure pressure-reducing valve according to claim 4 is characterized in that: described piston lower end is provided with nonmetal overflow seat, and the following aperture of described overflow through hole is opened in the lower end surface of nonmetal overflow seat.
6. high-pressure pressure-reducing valve according to claim 1, it is characterized in that: the piston mounting hole slipper seal of corresponding setting cooperates in described piston and the valve body, piston is provided with the O type circle that is sealed and matched with the piston mounting hole, and the piston of O type circle below offers at least three road circular grooves.
7. high-pressure pressure-reducing valve according to claim 1 is characterized in that: logically between air outlet and ambient atmosphere in the described valve body be provided with safe overflow ducts, be provided with safe overflow mechanism in the safe overflow ducts.
8. high-pressure pressure-reducing valve according to claim 7, it is characterized in that: described safe overflow mechanism comprises the look nut that is bolted in the safe overflow ducts, is contained in the steel ball that ball seat on the look nut and top are assigned in corresponding seal orifice place in ball seat and the safe overflow ducts by the safety spring top, and described ball seat and steel ball are located at a side of the close air outlet of look nut.
9. high-pressure pressure-reducing valve according to claim 8 is characterized in that: be bolted with in the safe overflow ducts of described look nut away from a side of air outlet and push up the locking nut that is contained on the look nut.
10. high-pressure pressure-reducing valve according to claim 1, it is characterized in that: the pressure regulating axis that described spring regulator comprises adjusting pressuring knob that the valve body top is provided with, be connected with adjusting pressuring knob, pressure adjusting spring seat, the piston seat that is assemblied in piston tip that rotation is assemblied in the pressure regulating axis lower end, be mounted on the pressure adjusting spring between pressure adjusting spring seat and the piston seat, described pressure adjusting spring is connected between pressure adjusting spring seat and the piston seat at two ends up and down, rotate assembling, piston seat lower end and piston head press fit by thrust ball bearing between described pressure regulating axis lower end and the pressure adjusting spring seat.
11. high-pressure pressure-reducing valve according to claim 10 is characterized in that: the end face of described piston upper end is a sphere, and the piston seat lower end is provided with the sphere line contact matching of taper hole face and piston upper end.
12. according to any described high-pressure pressure-reducing valve in the claim 1～11, it is characterized in that: described valve body is to be connected and composed by upper and lower two-part valve seal, be located in the upper valve body on described piston and the spring regulator, valve seat is located at down in the valve body, described outlet chamber is located between the opposing end surface of upper and lower valve inner, and upper and lower valve body has the adjustment pad near support assemblies between the opposing end surface of outer surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103055838A CN101625043B (en) | 2009-08-13 | 2009-08-13 | high-pressure reducing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103055838A CN101625043B (en) | 2009-08-13 | 2009-08-13 | high-pressure reducing valve |
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| CN101625043A CN101625043A (en) | 2010-01-13 |
| CN101625043B true CN101625043B (en) | 2011-12-21 |
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| CN2009103055838A Active CN101625043B (en) | 2009-08-13 | 2009-08-13 | high-pressure reducing valve |
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-
2009
- 2009-08-13 CN CN2009103055838A patent/CN101625043B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101625043A (en) | 2010-01-13 |
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