CN204083312U - A kind of temperature-decreased pressure reducer improveing spool - Google Patents

A kind of temperature-decreased pressure reducer improveing spool Download PDF

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Publication number
CN204083312U
CN204083312U CN201420520262.6U CN201420520262U CN204083312U CN 204083312 U CN204083312 U CN 204083312U CN 201420520262 U CN201420520262 U CN 201420520262U CN 204083312 U CN204083312 U CN 204083312U
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China
Prior art keywords
sleeve
valve
ring
spool
outer sleeve
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CN201420520262.6U
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Chinese (zh)
Inventor
蒋化勇
李胜果
高玉民
周学刚
李静
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Yan Kuang Xinjiang Coal Chemical Industry Co Ltd
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Yan Kuang Xinjiang Coal Chemical Industry Co Ltd
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Abstract

The utility model relates to a kind of temperature-decreased pressure reducer improveing spool, this decompressor is by valve body, valve seat, sleeve-type valve core, outer sleeve, pilot valve, spool pressure ring, back-up ring, pressure sealing ring, sealing environment protecting protection pad, segmentation ring, selfsealings trim ring, selfsealings nut, packing bushing, shaped filler, filler pressing sleeve, Gland, filler screw, small sleeve and throttle orifice composition, by the improvement to the main valve plug in sleeve-type valve core, the small sleeve of primary spools is made to extend in valve seat, in whole service process, there is guiding up and down, avoid producing surging phenomenon.The small sleeve of the main valve plug simultaneously in sleeve-type valve core having the throttle orifice of several symmetries, also playing certain throttling and step-down, noise reduction when regulating.Turn improve small flow aperture simultaneously, avoid valve to work under low aperture for a long time, reduce washing away and destroying spool valve seat, thus also extend the working life of valve.

Description

A kind of temperature-decreased pressure reducer improveing spool
Technical field
The utility model relates to a kind of temperature-decreased pressure reducer improveing spool, is for thermoelectricity pipe network or turbine bypass system mesohigh superheated steam temperature reduction decompressor.
Background technique
Thermoelectricity pipe network or turbine bypass system mesohigh superheated steam temperature reduction decompressor dependence on import product always for a long time, because temperature-decreased pressure reducer requires higher, substantially be all telescoping valve structure, there is High Pressure Difference, high temperature, horizontal installation, degree of regulation high, because be superhigh pressure difference use occasion, so multistage sleeve can only be used could to meet the usage requirement of High Pressure Difference.But this valve is except having and regulating requirement, also needs the target realizing tightly turning off even zero leakage when closing, owing to being applied at elevated temperature occasion, can not soft sealing structure be used, under shape metallic leak-proof structure, carry out tight shutoff difficulty really by the power of actuator.And easily sealing surface of seat is damaged during actuator's quick closedown of high thrust.In actual use, often there will be the surging phenomenon of valve under a certain aperture, causing cannot regulating valve, therefore fundamentally addresses this problem most important.
Because valve is in horizontally-mounted, valve is when standard-sized sheet, and the guiding all by spool top leads, and adds the effect of side direction pressure medium, and spool to skew, can cause having lateral force to produce.
The deficiency that the utility model exists at existing temperature-decreased pressure reducer, a kind of temperature-decreased pressure reducer improveing spool is provided, by to spool architecture advances can solve surge in valve running well, ensure that the continuous operation of temperature-decreased pressure reducer, meet onsite application requirement.
Summary of the invention
The utility model object is, a kind of temperature-decreased pressure reducer improveing spool is provided, this decompressor is by valve body, valve seat, sleeve-type valve core, outer sleeve, pilot valve, spool pressure ring, back-up ring, pressure sealing ring, sealing environment protecting protection pad, segmentation ring, selfsealings trim ring, selfsealings nut, packing bushing, shaped filler, filler pressing sleeve, Gland, filler screw, small sleeve and throttle orifice composition, by the improvement to the main valve plug in sleeve-type valve core, the small sleeve of primary spools is made to extend in valve seat, in whole service process, there is guiding up and down, avoid producing surging phenomenon.The small sleeve of the main valve plug simultaneously in sleeve-type valve core having the throttle orifice of several symmetries, also playing certain throttling and step-down, noise reduction when regulating.Turn improve small flow aperture simultaneously, avoid valve to work under low aperture for a long time, reduce washing away and destroying spool valve seat, thus also extend the working life of valve.
A kind of temperature-decreased pressure reducer improveing spool described in the utility model, this decompressor is by valve body, valve seat, sleeve-type valve core, outer sleeve, pilot valve, spool pressure ring, back-up ring, pressure sealing ring, sealing environment protecting protection pad, segmentation ring, selfsealings trim ring, selfsealings nut, packing bushing, shaped filler, filler pressing sleeve, Gland, filler screw, small sleeve and throttle orifice composition, fixed valve base (2) in valve body (1), outer sleeve (4) integral installation is in valve body (1), and the lower end of outer sleeve (4) is stuck on valve seat (2), at outer sleeve (4) internal fixtion by main valve plug (3), pilot valve (5), the sleeve-type valve core that spool pressure ring (6) and small sleeve (18) form, pilot valve (5) is fixed in main valve plug (3) by spool pressure ring (6), pilot valve (5) moves up and down in main valve plug (3), sleeve-type valve core moves up and down in outer sleeve (4), Gland (16) is threaded connection at outer sleeve (4) top, be connected with filler pressing sleeve (15) by filler screw (17) again, it is upper with selfsealings trim ring (11) with split ring (10) and be connected that selfsealings nut (12) is fixed on outer sleeve (4) by screw thread, the bottom of segmentation ring (10) is provided with sealing environment protecting protection pad (9), and the bottom of sealing environment protecting protection pad (9) is provided with pressure sealing ring (8).
The segmentation ring (10) above arranged at outer sleeve (4) is 4 pieces, and the side of segmentation ring (10) is embedded in valve body (1) segmentation annular groove.
Pressure sealing ring (8) is adopted to seal between outer sleeve (4) and valve body (1).
Shaped filler (14) and packing bushing (13) is provided with between outer sleeve (4) top and pilot valve (5).
The small sleeve (18) of main valve plug (3) lower end in sleeve-type valve core has the throttle orifice (19) of several symmetries, small sleeve (18) extends in valve seat (2).
The top of pilot valve (5) is connected with electric actuator or pneumatic actuator.
A kind of temperature-decreased pressure reducer improveing spool described in the utility model, this temperature-decreased pressure reducer has following technical characterstic:
(1) modified node method is lengthened bottom spool, and Excircle machining throttle orifice on the small sleeve of sleeve-type valve core bottom, after medium enters into outer sleeve from the side, small sleeve through sleeve-type valve core bottom flows out, after twice step-down, pressure can be distributed on each sleeve, improves former buck configuration, avoid that the noise originally only having a sleeve step-down to bring exceeds standard, local eddy currents increase causes valve to occur surging phenomenon under low aperture, extend the working life of valve.
(2) owing to adopting bottom sleeves formula valve core structure, and have the sleeve aperture of regulating flow quantity bottom spool, enter the end due to the flow direction for side and go out, the small sleeve of such sleeve-type valve core bottom will bear the pressure drop exceeding half.
(3) because steam is compressible fluid, before valve core structure does not improve, steam is by the step-down of outer sleeve, all pressure drops are all completed by outer sleeve, therefore substantially drop to downstream pressure by the pressure at spool sealing surface of seat place, pressure is less, and density is also less, therefore larger at the velocity of medium at spool sealing surface of seat place, cause the impact to spool sealing surface of seat and destruction.After valve core structure improves, steam is by after the step-down of outer sleeve, after continuing through spool sealing surface of seat, just valve is flowed out again by the porous sleeve of spool bottom, therefore pressure reduction greatly shared by the sleeve of spool bottom, therefore the pressure of MEDIA FLOW through spool sealing surface of seat place is just than large before transformation, pressure is larger, density is larger, therefore will reduce at the velocity of medium at spool sealing surface of seat place, thus substantially improve the media environment at spool sealing surface of seat place, avoid the destruction of high velocity vapor fluid to spool sealing surface of seat, thus extend the working life of valve.
(4) valve core structure after improving, because the small sleeve of sleeve-type valve core bottom can as the guiding of spool bottom, make in whole stroke, all there is the guiding of upper and lower in spool, guiding ensure that the smooth running of spool up and down, thus ensure that the safety and stability of equipment is run continuously, fundamentally eliminate surging phenomenon.
(5) ladder spool design, ensure that the structure accuracy that pilot valve designs.During valve open, pilot valve is opened in advance, and after opening, main valve plug two-way pressure balances, and easily opens; During valve closing, main valve plug is first closed, and then closes pilot valve, utilizes the pressure of high-pressure medium to realize zero leakage, additionally reduces actuator's size, reduce cost.
(6) due to ladder spool design, spool bottom is larger than upper dimension, when valve is closed downwards, spool will produce a unbalanced force, because bottom is large, therefore unbalanced force is downward, forces main valve plug first to be closed like this, and then closed by actuator's promotion pilot valve, ensure that the Long-Time Service of valve.
(7) owing to considering that temperature-decreased pressure reducer is mostly horizontally-mounted, therefore, the gap of spool and sleeve is very little, and in order to avoid there is thermal expansion stuck phenomenon, the cylindrical place of spool machined a lot of sulculus, avoids occurring stuck phenomenon to give expansion room.
(8) owing to being High Temperature High Pressure structure, what valve gap adopted is self sealing structure, and adopt flexible graphite sealing ring, the inside interlayer stainless steel strengthens.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is model utility sleeve-type valve core structural drawing;
Fig. 3 is model utility pilot valve and main valve plug assembly structure figure;
Fig. 4 is model utility selfsealings valve gap structural drawing.
1-valve body in figure, 2-valve seat, 3-main valve plug, 4-outer sleeve; 5-pilot valve, 6-spool pressure ring, 7-back-up ring, 8-pressure sealing ring; 9-sealing environment protecting protection pad, 10-splits ring, 11-selfsealings trim ring, 12-selfsealings nut; 13-packing bushing, 14-shaped filler, 15-filler pressing sleeve; 16-Gland, 17-filler screw, 18-small sleeve; 19-throttle orifice, 20-primary sealing area, 21-secondary sealing area.
Embodiment
Further illustrate the feature of the utility model structure by reference to the accompanying drawings, and provide embodiment:
A kind of temperature-decreased pressure reducer improveing spool described in the utility model, this decompressor is by valve body, valve seat, sleeve-type valve core, outer sleeve, pilot valve, spool pressure ring, back-up ring, pressure sealing ring, sealing environment protecting protection pad, segmentation ring, selfsealings trim ring, selfsealings nut, packing bushing, shaped filler, filler pressing sleeve, Gland, filler screw, small sleeve and throttle orifice composition, fixed valve base 2 in valve body 1, outer sleeve 4 integral installation is in valve body 1, and the lower end of outer sleeve 4 is stuck on valve seat 2, at outer sleeve 4 internal fixtion by main valve plug 3, pilot valve 5, the sleeve-type valve core that spool pressure ring 6 and small sleeve 18 form, the small sleeve 18 of main valve plug 3 lower end in sleeve-type valve core has the throttle orifice 19 of several symmetries, small sleeve 18 extends in valve seat 2, the segmentation ring 10 that outer sleeve 4 is arranged is 4 pieces, the side of segmentation ring 10 is embedded in valve body 1 and splits in annular groove, pressure sealing ring 8 is adopted to seal between outer sleeve 4 and valve body 1, shaped filler 14 and packing bushing 13 is provided with between outer sleeve 4 top and pilot valve 5, pilot valve 5 is fixed in main valve plug 3 by spool pressure ring 6, pilot valve 5 moves up and down in main valve plug 3, main valve plug 3 moves up and down in outer sleeve 4, Gland 16 is threaded connection at outer sleeve 4 top, be connected with filler pressing sleeve 15 by filler screw 17 again, selfsealings nut 12 to be fixed on outer sleeve 4 with selfsealings trim ring 11 by screw thread and to split ring 10 and be connected, the bottom of segmentation ring 10 is provided with sealing environment protecting protection pad 9, the bottom of sealing environment protecting protection pad 9 is provided with pressure sealing ring 8, the top of pilot valve 5 is connected with electric actuator or pneumatic actuator,
In use, Gland 16 is threaded connection at outer sleeve 4 top, again by screwing filler screw 17, compress Gland 16 successively, filler pressing sleeve 15, shaped filler 14 and packing bushing 13, and be fastened in outer sleeve 4, realize the sealing between pilot valve 5 and outer sleeve 4, valve seat 2 is fixed in valve body 1, outer sleeve 4 integral installation is in valve body 1, and be stuck on valve seat 2, pressure sealing ring 8 is adopted to seal between outer sleeve 4 and valve body 1, segmentation totally 4 pieces, ring 10, being embedded in valve body 1 splits in annular groove, screwed by selfsealings nut 12, compress selfsealings trim ring 11 successively, segmentation ring 10, sealing environment protecting protection pad 9, pressure sealing ring 8, for the sealing of pressure sealing ring 8 provides pretightening force, slightly mention outer sleeve 4 simultaneously, tightly be fixed on valve body 1 by segmentation ring 10, sleeve-type valve core is by main valve plug 3, small sleeve 18, pilot valve 5 and spool pressure ring 6 form, main valve plug 3 and small sleeve 18 are welded as a whole, pilot valve 5 is fixed on inside main valve plug 3 by spool pressure ring 6, can move up and down in stroke range, whole sleeve-type valve core is arranged in outer sleeve 4, bottom sleeve-type valve core, small sleeve 18 extend in valve seat 2, length is greater than the stroke of sleeve-type valve core in outer sleeve 4, to ensure that valve is when fully open position, small sleeve 18 does not depart from valve seat 2,
When valve opening: valve is closed condition, pilot valve 5 is under the pulling of electric actuator or pneumatic actuator, upwards mention, pilot valve 5 have left the secondary sealing area 21 with main valve plug 3, when above rising to pilot valve 5 when the range of main valve plug 3, drive main valve plug 3 to move upward simultaneously, main valve plug 3 have left the primary sealing area 20 with valve seat 2, until stop at the maximum travel position of main valve plug 3 in outer sleeve 4, now, length because of small sleeve 18 is greater than the range of main valve plug 3 in outer sleeve 4, so, small sleeve 18 is still in valve seat 2, do not lift off a seat 2,
Close valve: valve is full-gear, pilot valve 5 is under the promotion of electric actuator or pneumatic actuator, move downward, due to the effect of high temperature and high pressure steam, make will to produce a downward unbalanced force on main valve plug 3, main valve plug 3 is forced to move downward together with pilot valve 5, until main valve plug 3 is first closed, and then closed by electric actuator or pneumatic actuator promotion pilot valve 5, now, small sleeve 18 bottom main valve plug 3 is all deep in valve seat 2, under the thrust of electric actuator or pneumatic actuator, main valve plug 3 is compressed with the primary sealing area 20 of valve seat 2 and the secondary sealing area 21 of pilot valve 5 and main valve plug 3 simultaneously, cut off the circulation of high temperature and high pressure steam medium,
Small sleeve 18 Excircle machining throttle orifice 19 bottom main valve plug 3, when main valve plug 3 is opened, medium enters into outer sleeve 4 from the side, through the primary sealing area 20 of spool 3 valve seat 2, and then enter into the small sleeve 18 of spool (3) bottom, after finally flowing out valve from spool 3 bottom, medium is after the step-down of two-layer sleeve flows to valve again, high-pressure medium, through the step-down of two-layer sleeve, is just in the intermediate value of inlet pressure and outlet pressure at the pressure at primary sealing area 20 place of spool 3 valve seat 2, sleeve-type valve core adopts leading type spool 5 structure, namely main valve plug 3 diameter is greater than the diameter of pilot valve 5, when such sleeve-type valve core is closed downwards, due to the effect of high temperature and high pressure steam, main valve plug 3 will produce a downward unbalanced force, main valve plug 3 is forced first to be closed, and then closed by electric actuator or pneumatic actuator promotion pilot valve 5, owing to being small sleeve 18 bottom main valve plug 3, serve leading role, sleeve-type valve core has guiding in whole service process, which adds the stability of operation, completely eliminate the surging phenomenon of valve in running, fundamentally eliminate use hidden danger.

Claims (6)

1. improve a temperature-decreased pressure reducer for spool, it is characterized in that this decompressor is by valve body, valve seat, sleeve-type valve core, outer sleeve, pilot valve, spool pressure ring, back-up ring, pressure sealing ring, sealing environment protecting protection pad, segmentation ring, selfsealings trim ring, selfsealings nut, packing bushing, shaped filler, filler pressing sleeve, Gland, filler screw, small sleeve and throttle orifice composition, fixed valve base (2) in valve body (1), outer sleeve (4) integral installation is in valve body (1), and the lower end of outer sleeve (4) is stuck on valve seat (2), at outer sleeve (4) internal fixtion by main valve plug (3), pilot valve (5), the sleeve-type valve core that spool pressure ring (6) and small sleeve (18) form, pilot valve (5) is fixed in main valve plug (3) by spool pressure ring (6), pilot valve (5) moves up and down in main valve plug (3), sleeve-type valve core moves up and down in outer sleeve (4), Gland (16) is threaded connection at outer sleeve (4) top, be connected with filler pressing sleeve (15) by filler screw (17) again, it is upper with selfsealings trim ring (11) with split ring (10) and be connected that selfsealings nut (12) is fixed on outer sleeve (4) by screw thread, the bottom of segmentation ring (10) is provided with sealing environment protecting protection pad (9), and the bottom of sealing environment protecting protection pad (9) is provided with pressure sealing ring (8).
2. the temperature-decreased pressure reducer of improvement spool according to claim 1, it is characterized in that at the upper segmentation ring (10) arranged of outer sleeve (4) be 4 pieces, the side of segmentation ring (10) is embedded in valve body (1) segmentation annular groove.
3. the temperature-decreased pressure reducer of improvement spool according to claim 1, is characterized in that adopting pressure sealing ring (8) to seal between outer sleeve (4) and valve body (1).
4. the temperature-decreased pressure reducer of improvement spool according to claim 1, is characterized in that between outer sleeve (4) top and pilot valve (5), be provided with shaped filler (14) and packing bushing (13).
5. the temperature-decreased pressure reducer of improvement spool according to claim 1, the small sleeve (18) that it is characterized in that main valve plug (3) lower end in sleeve-type valve core has the throttle orifice (19) of several symmetries, small sleeve (18) extends in valve seat (2).
6. the temperature-decreased pressure reducer of improvement spool according to claim 1, is characterized in that the top of pilot valve (5) is connected with electric actuator or pneumatic actuator.
CN201420520262.6U 2014-09-11 2014-09-11 A kind of temperature-decreased pressure reducer improveing spool Active CN204083312U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108317298A (en) * 2018-03-04 2018-07-24 江苏江进泵业有限公司 Low leakage pilot-operated type single-seat adjusting valve spool
CN109654242A (en) * 2019-02-19 2019-04-19 成都乘风阀门有限责任公司 High-pressure angle type throttle valve
CN109780314A (en) * 2019-03-21 2019-05-21 无锡智能自控工程股份有限公司 A kind of suspension type labyrinth tube-in-tube structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108317298A (en) * 2018-03-04 2018-07-24 江苏江进泵业有限公司 Low leakage pilot-operated type single-seat adjusting valve spool
CN109654242A (en) * 2019-02-19 2019-04-19 成都乘风阀门有限责任公司 High-pressure angle type throttle valve
CN109780314A (en) * 2019-03-21 2019-05-21 无锡智能自控工程股份有限公司 A kind of suspension type labyrinth tube-in-tube structure

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