CN203585476U - Low-noise high pressure difference regulating valve - Google Patents
Low-noise high pressure difference regulating valve Download PDFInfo
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- CN203585476U CN203585476U CN201320714832.0U CN201320714832U CN203585476U CN 203585476 U CN203585476 U CN 203585476U CN 201320714832 U CN201320714832 U CN 201320714832U CN 203585476 U CN203585476 U CN 203585476U
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- high pressure
- valve
- sleeve
- low noise
- noise high
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Abstract
The utility model provides a low-noise high pressure difference regulating valve. The low-noise high pressure difference regulating valve comprises a valve body, a valve bonnet, a sleeve, a valve core and a valve stem, wherein the valve bonnet is connected to the top of the valve body via bolts, the sleeve is arranged between the valve bonnet and the valve body in a clamped manner, a plurality of first regulating holes are formed in the upper portion of a sidewall face of the sleeve, a plurality of second regulating holes are formed in the lower portion of the sidewall face of the sleeve as well as a bottom face of the sleeve, the valve core is arranged in an inner cavity of the sleeve and can move up and down to realize closing and opening of the low-noise high pressure difference regulating valve, a plurality of pressure balancing holes are axially formed inside the valve core, and the valve stem penetrates through a through hole formed in the valve bonnet and is connected with the valve core. The low-noise high pressure difference regulating valve has the advantages of simple, compact and reasonable structure, small size, light weight and capability of bearing high pressure difference and high leakage grades under the condition of same driving sources.
Description
Technical field
The utility model relates to a kind of valve, designs especially a kind of low noise high pressure differential regulating valve.
Background technique
In industrial automatic control, in industrial automatic control, often need control flow, temperature, pressure with modulating valve; With regard to the small-sized modulating valve of current essence, due to standardization, modularization is not enough, use that pressure reduction is low, versatility is poor.In the prior art, the main problem existing has: single seat regulates owing to being single seat sealing, spool is uneven form, in the situation that upstream pressure is greater than downstream pressure greatly, at spool, can form very large unbalanced force up and down, modulating valve needs very large driving source just can overcome the unbalanced force being produced by medium, therefore single seat type modulating valve is not suitable for the operating mode of High Pressure Difference, and cage type balancing adjustable valve is to have metering orifice at upper bush, therefore in High Pressure Difference situation, can not reduce noise and cavitation erosion.On the other hand, when using existing modulating valve, also unavoidablely occurred that the leakage of modulating valve filler, airborne dust, foreign material easily bring the problem of stuffing box into along with the motion of valve rod, the appearance of this this problem will soon cause the sealing of stuffing box destroyed.
Model utility content
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple, compact and reasonable for structure; Volume is little, lightweight, and one time assembly qualified rate is high, has under the condition of equal driving source, can bear High Pressure Difference and the high poor low noise high pressure differential regulating valve of low noise high pressure of revealing grade.
For achieving the above object, described low noise high pressure differential regulating valve of the present utility model, include valve body, valve gap, sleeve, spool and valve rod, wherein, described valve gap is bolted the top in described valve body, on dividing plate between the import inner chamber of described valve body and outlet inner chamber, offer through hole, for described sleeve, be arranged in wherein, described sleeve top is resisted against described valve gap, the top of described sleeve lateral wall face offers the first kind adjustment hole of a plurality of connections described valve body import inner chamber and barrel bore, the bottom surface of the bottom of described sleeve lateral wall face and institute's sleeve offers respectively the Equations of The Second Kind adjustment hole of a plurality of connection valve outlet inner chambers and barrel bore, described spool is arranged in barrel bore, and on can be in described barrel bore, lower movement, so that described first kind adjustment hole seals or opens, thereby realize the closed of described low noise high pressure differential regulating valve or open, the outer side wall of described spool and the madial wall of described sleeve fit tightly, and described valve core inside offers a plurality of pressure compensation openings to be communicated with the upper of described barrel bore along its axial direction, lower two, described valve rod is through being opened in the central through bore on described valve gap and being connected with described spool.
The utility model is simple, compact and reasonable for structure, volume is little, lightweight, and one time assembly qualified rate is high, also has under the condition of equal driving source, can bear High Pressure Difference and the high feature of revealing grade, because spool valve seat adopts balance type structure, on sleeve, be equipped with adjustment hole, under modulating valve working state, processing medium by modulating valve upstream through the adjustment hole of sleeve and spool and pressure compensation opening the downstream to modulating valve, under modulating valve closed condition, because upstream pressure is greater than downstream pressure greatly, processing medium by modulating valve cavity of resorption through the pressure compensation opening of spool the upstream position to modulating valve barrel bore, make spool up and down under pressure balance, unbalanced force is the limited part that the upper and lower two sealing surface area difference of spool produce, greatly reduced the ouput force of driving source, owing to adopting single valve seat structure, greatly reduce the leakage rate of modulating valve, meanwhile, owing to having adopted throttling window, effectively reduce the kinetic noise of modulating valve, also reduced the probability that cavitation erosion and cavitation phenomenon produce.
Accompanying drawing explanation
From to the following description of the preferred embodiments and drawings of purport of the present utility model and use thereof is described, above and other objects, features and advantages of the present utility model will be apparent, in the accompanying drawings:
Fig. 1 is the structural representation of low noise high pressure differential regulating valve described in the utility model;
Fig. 2 is the enlarged diagram of A portion in Fig. 1;
Fig. 3 is the sleeve spool valve of low noise high pressure differential regulating valve described in the utility model and the partial schematic diagram of valve rod;
Fig. 4 is the enlarged diagram of the balanced seal ring of low noise high pressure differential regulating valve described in the utility model;
Fig. 5 A is the schematic diagram of the sleeve bottom surface that offers Equations of The Second Kind adjustment hole of low noise high pressure differential regulating valve described in the utility model;
Fig. 5 B is the another schematic diagram of the sleeve bottom surface that offers Equations of The Second Kind adjustment hole of low noise high pressure differential regulating valve described in the utility model;
Fig. 6 is the worm's eye view of the cover core that offers pressure compensation opening of low noise high pressure differential regulating valve described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, low noise high pressure differential regulating valve described in the utility model is described.
As shown in Figure 1, low noise high pressure differential regulating valve described in the utility model, include valve body 1, valve gap 2, sleeve 3, spool 4 and valve rod 5, wherein, described valve gap 2 is connected in the top of described valve body 1 by bolt 22, on dividing plate 13 between the import inner chamber 11 of described valve body and outlet inner chamber 12, offer through hole 130, for described sleeve 3, be arranged in wherein, the top of described sleeve 3 is resisted against described valve gap 1, on the top of the side wall surface of described sleeve 3, offer the first kind adjustment hole 32 of the described valve body import of a plurality of connections inner chamber 11 and barrel bore 31, the bottom of described sleeve lateral wall face and institute's sleeve bottom surface offer respectively the Equations of The Second Kind adjustment hole 34 of a plurality of connection valve outlet inner chambers 12 and barrel bore 31, described spool 4 is arranged in barrel bore 31, and on can be in described barrel bore 31, lower movement, so that described first kind adjustment hole 32 seals or opens, thereby realize the closed of described low noise high pressure differential regulating valve or open, the madial wall of the outer side wall of described spool 4 and described sleeve 3 fits tightly, and described spool 4 inside offer a plurality of pressure compensation openings 41 to be communicated with the upper of described barrel bore along its axial direction, lower two, , described valve rod 5 is through being opened in the central through bore 21 on described valve gap 2 and being connected with described spool 4.
In the in running order lower time of low noise high pressure differential regulating valve described in the utility model, described spool 4 moves down under the drive that is attached thereto the valve rod 5 connecing, and medium passes through first kind adjustment hole 32, spool pressure compensation opening 41 and Equations of The Second Kind adjustment hole 34 to the outlet inner chamber 12 of described modulating valve successively by the import inner chamber 11 of described verdant formula valve body modulating valve.And on the contrary, when described low noise high pressure differential regulating valve in closed condition lower time, because upstream pressure is greater than downstream pressure greatly, medium by export inner chamber 12 through the pressure compensation opening 41 of spool 4 upstream position to modulating valve barrel bore, make described spool 4 up and down under pressure balance.
And in a better embodiment of the present utility model, described sleeve 3 comprises upper bush 35 and the lower sleeve 36 with same lumen diameter, when described upper bush 35 and lower sleeve 36 are bonded together, at the described upper bush 35 of described sleeve madial wall and the engagement positio of lower sleeve 36, form first ring connected in star 37, in described first ring connected in star, be provided with balanced seal ring 7, described first kind adjustment hole 32 is opened in the side wall surface of described upper bush 35, described Equations of The Second Kind adjustment hole 34 is opened on the side wall surface of described lower sleeve 36 and the bottom surface of described lower sleeve.
Preferably, described upper bush 35 bottoms are provided with ring-shaped lug 351, and accordingly, described lower sleeve 36 tops offer annular groove 361, when described upper bush and lower sleeve are bonded together, described ring-shaped lug 351 is placed in described annular groove 361, and between described ring-shaped lug 351 and annular groove 361, is formed with first ring connected in star 37, and is provided with balanced seal ring 7 in described first ring connected in star 37.
Wherein, as shown in Figure 3, described balanced seal ring 7 comprises outside seal piece 71 and the inner annular spring 72 of being made by soft sealing material, the lower surface of described outside seal piece 71 offers for the accommodating cavity 711 of described inner annular spring 72, inside and outside sleeve, pressure at both sides hour, described upper bush 35 and lower sleeve 36 are that the deformation by the inner annular spring 72 of described balanced seal ring 7 is sealed, and when the inside and outside pressure at both sides of described upper bush 35 and lower sleeve 36 is larger, liquid medium can flow in described cavity 711 and the described outside seal piece 71 of being made by soft sealing material is strutted, thereby reach sealing effect.
And in order to limit described spool 4 in the upper and lower displacement of described barrel bore inside, on described upper bush 35 madial walls, also can be provided with limit stoper.Described upper bush 35 inner chambers have minor diameter part 353 and the large-diameter portion 352 identical with the intracavity diameter of described lower sleeve 36, the madial wall of the madial wall of the outer side wall of described spool 4 and described upper bush 35 inner chamber large-diameter portions 352 and described lower sleeve 36 inner chambers fits tightly, so that described spool 4 can be in the inner chamber large-diameter portion 352 of described upper bush 35 and described lower sleeve 36 inner chambers on, lower movement, and between described minor diameter part 353 and large-diameter portion 352 by limit stoper 33 transition, when described spool 4 is moved upward to this limit stoper 33, this limit stoper 33 has stopped that this spool 4 continues to move upward, thereby certain space is left on the top at described modulating valve sleeve, when described low noise high pressure differential regulating valve in closed condition lower time, medium by export inner chamber 12 through the pressure compensation opening 41 of spool 4 upstream position to modulating valve barrel bore.
As shown in Figure 1,3, preferably, the large-diameter portion 352 that 32 of described first kind adjustment holes are communicated with described valve body import inner chambers 11 and barrel bore wherein, between described minor diameter part 353 and large-diameter portion 352 by limit stoper 33 transition.
Further, between described valve gap and described sleeve top, be provided with lid gasket 6.Preferably, described upper lid gasket metal wound gasket.
In a better embodiment of the present utility model, the described upper bush 35 side wall surfaces multiple row first kind adjustment hole 32 that has been equidistantly spaced, the number of the first kind adjustment hole 32 comprising in each row is identical or not identical.More preferably, the described upper bush side wall surface 10 row first kind adjustment holes 32 that have been equidistantly spaced, in each row, include 3 first kind adjustment holes, and each first kind adjustment hole 32 in these row aligns with first kind adjustment hole 32 corresponding in adjacent column, and the aperture of all first kind adjustment holes 32 is identical, be all 3mm, certainly, in other mode of execution of the present utility model, the aperture of described first kind adjustment hole 32 mutually can need to be for not identical according to actual design.
Further, the described lower sleeve 36 side wall surfaces multiple row Equations of The Second Kind adjustment hole 34 that has been equidistantly spaced, wherein, the number of the Equations of The Second Kind adjustment hole 34 comprising in two adjacent row Equations of The Second Kind adjustment holes is not identical, and the number of the Equations of The Second Kind adjustment hole 34 comprising in two row Equations of The Second Kind adjustment holes adjacent with a certain row Equations of The Second Kind adjustment hole is identical.Particularly, the described lower sleeve 36 side wall surfaces 10 row Equations of The Second Kind adjustment holes that have been equidistantly spaced, wherein, 5 row Equations of The Second Kind adjustment holes comprise 3 Equations of The Second Kind adjustment holes 34, and other 5 row Equations of The Second Kind adjustment holes comprise 4 Equations of The Second Kind adjustment holes, each row Equations of The Second Kind adjustment hole space that includes the Equations of The Second Kind adjustment hole 34 of varying number arranges.Wherein the aperture of all Equations of The Second Kind adjustment holes 34 is identical, is all 3mm, and certainly, in other mode of execution of the present utility model, the aperture of described Equations of The Second Kind adjustment hole 34 mutually can need to be for not identical according to actual design.
Further, a plurality of Equations of The Second Kind adjustment holes 34 of offering on the bottom surface 361 of described lower sleeve 36 surround a plurality of annular rings around the center of described lower sleeve bottom surface, and the axle center that surrounds a plurality of Equations of The Second Kind adjustment holes 3 of same annular ring is distributed on this annular ring equally spacedly.Preferably, as Fig. 5 A, shown in 5B, on described lower sleeve bottom surface 361, offer altogether 60 Equations of The Second Kind adjustment holes 34, described 60 Equations of The Second Kind adjustment holes surround 5 annular rings around the center of described lower sleeve bottom surface, wherein, from-inner-to-outer ground, the number of the Equations of The Second Kind adjustment hole comprising on described 5 annular rings is respectively 4, 8, 16, 16 and 16, wherein, the axle center that surrounds 4 Equations of The Second Kind adjustment holes 3 of interior annular circle is distributed on this interior annular circle equally spacedly, the axle center that surrounds 16 Equations of The Second Kind adjustment holes 3 of outermost annular ring is distributed on this outermost annular ring equally spacedly.Further, the aperture of all Equations of The Second Kind adjustment holes 34 is identical, is all 3mm, and certainly, in other mode of execution of the present utility model, the aperture of described Equations of The Second Kind adjustment hole 34 mutually can need to be for not identical according to actual design.
Further, as shown in Figure 6, a plurality of pressure compensation openings 41 that are opened on described spool 4 comprise a plurality of large footpaths pressure compensation opening 411 and a plurality of path pressure compensation opening 412, described a plurality of large footpaths pressure compensation opening 411 and described a plurality of path pressure compensation opening 412 surround the first annular ring and the second annular ring around the central shaft (extending along described valve shaft 5) of described spool respectively, wherein, the diameter of the first annular ring is greater than the diameter of the second annular ring.Preferably, as shown in Figure 4, the described pressure compensation opening 41 that is opened in described valve core inside comprises 8 large footpath pressure compensation openings 411 and 8 path pressure compensation openings 412, described 8 large footpath pressure compensation openings 411 are equally spaced distributed on the first annular ring being comprised of it equably, and described 8 path pressure compensation openings 412 are equally spaced distributed on the second annular ring being comprised of it equably.Further, the aperture of all large footpaths pressure compensation opening 411 is identical, it can need to have identical or not identical aperture according to actual design, certainly, in other mode of execution of the present utility model, the aperture of described large footpath pressure compensation opening 411 mutually can need to be for not identical according to actual design; And the aperture of all path pressure compensation openings 412 is also identical, it can need to have identical or not identical aperture according to actual design, certainly, in other mode of execution of the present utility model, the aperture of described path pressure compensation opening 412 mutually can need to be for not identical according to actual design.
Further, as shown in Figure 2, between the central through bore 21 of described valve gap 2 and described valve rod 5, be provided with stuffing box 8 and Gland 9, wherein, in described stuffing box, be filled with packing spring 81 and filler combination 82, preferably, described filler combination 82 is V-type filler.More preferably, between described stuffing box 8 and Gland 9, be also folded with Support cushion 85, to prevent that extraneous dust foreign material are along with the motion of valve rod is brought in described stuffing box 82.
Further, as shown in Figure 2, the madial wall of described Gland 9 bottoms and outer side wall offer respectively outer annular groove 91 and inner annular groove 92 radially.On the one hand.In described outer annular groove 91, be provided with U-shaped circle 83, to prevent that medium is from stem movement gap to outward leakage; And on the other hand, in described inner annular groove, be provided with O type circle 84, to prevent that medium side clearance from stuffing box from outwards revealing.
Again further, in order to prevent that better extraneous dust foreign material are along with the motion of valve rod is brought in described stuffing box 82, described sleeve adjusting valve is also provided with dirt-proof boot 10, and described dirt-proof boot 10 is sheathed on the periphery of described valve rod 5, and its bottom contacts with the top of described Gland 9.As shown in Figure 2, in a better embodiment of the present utility model, described Gland 9 inside top faces are provided with the 3rd annular groove 93, bottom for described dirt-proof boot 10 is arranged in wherein, like this, 10 of described dirt-proof boots are relative fixing with described Gland 9, when described valve rod 5 moves up or down, described dirt-proof boot 10 not with institute 5 motions of described valve rod, thereby can more have, prevent that dust, foreign material are brought in described stuffing box 8.
Although described the utility model at this by embodiment, but those of ordinary skills know, in the situation that not departing from spirit of the present utility model and essence, just can make the utility model have many distortion and variation, scope of the present utility model is limited to the appended claims.
Claims (21)
1. a low noise high pressure differential regulating valve, it is characterized in that, include valve body, valve gap, sleeve, spool and valve rod, wherein, described valve gap is bolted the top in described valve body, on dividing plate between the import inner chamber of described valve body and outlet inner chamber, offer through hole, for described sleeve, be arranged in wherein, described sleeve top is resisted against described valve gap, the top of described sleeve lateral wall face offers the first kind adjustment hole of a plurality of connections described valve body import inner chamber and barrel bore, the bottom surface of the bottom of described sleeve lateral wall face and institute's sleeve offers respectively the Equations of The Second Kind adjustment hole of a plurality of connection valve outlet inner chambers and barrel bore, described spool is arranged in barrel bore, and on can be in described barrel bore, lower movement, so that described first kind adjustment hole seals or opens, thereby realize the closed of described low noise high pressure differential regulating valve or open, the outer side wall of described spool and the madial wall of described sleeve fit tightly, and described valve core inside offers a plurality of pressure compensation openings to be communicated with the upper of described barrel bore along its axial direction, lower two, described valve rod is through being opened in the central through bore on described valve gap and being connected with described spool.
2. low noise high pressure differential regulating valve as claimed in claim 1, it is characterized in that, described sleeve comprises upper bush and the lower sleeve with same lumen diameter, when described upper bush and lower sleeve are bonded together, at the described upper bush of described sleeve madial wall and the engagement positio of lower sleeve, form first ring connected in star, in described first ring connected in star, be provided with balanced seal ring, described first kind adjustment hole is opened in the side wall surface of described upper bush, and described Equations of The Second Kind adjustment hole is opened in the bottom surface of side wall surface and the described lower sleeve of described lower sleeve.
3. low noise high pressure differential regulating valve as claimed in claim 2, it is characterized in that, described upper bush bottom is provided with ring-shaped lug, and accordingly, described lower sleeve top offers annular groove, when described upper bush and lower sleeve are bonded together, described ring-shaped lug is placed in described annular groove, and between described ring-shaped lug and annular groove, forms first ring connected in star.
4. low noise high pressure differential regulating valve as claimed in claim 2, is characterized in that, on described upper bush madial wall, is provided with limit stoper, to limit described spool in the movement of described barrel bore inside.
5. low noise high pressure differential regulating valve as claimed in claim 2, it is characterized in that, described upper bush inner chamber has minor diameter part and the large-diameter portion identical with described lower sleeve intracavity diameter, the madial wall of the outer side wall of described spool and described upper bush inner chamber large-diameter portion and the madial wall of described lower sleeve inner chamber fit tightly, and described first kind adjustment hole is communicated with the large-diameter portion of described valve body import inner chamber and barrel bore.
6. low noise high pressure differential regulating valve as claimed in claim 2, is characterized in that, between described valve gap and described sleeve top, is provided with lid gasket.
7. low noise high pressure differential regulating valve as claimed in claim 6, is characterized in that, described upper lid gasket is metal wound gasket.
8. the low noise high pressure differential regulating valve as described in any one claim in claim 2-7, is characterized in that, the described upper bush side wall surface multiple row first kind adjustment hole that has been equidistantly spaced, and the number of the first kind adjustment hole comprising in each row is identical.
9. low noise high pressure differential regulating valve as claimed in claim 8, is characterized in that, the described upper bush side wall surface 10 row first kind adjustment holes that have been equidistantly spaced include 3 first kind adjustment holes in each row.
10. the low noise high pressure differential regulating valve as described in any one claim in claim 2-7, it is characterized in that, the described lower sleeve side wall surface multiple row Equations of The Second Kind adjustment hole that has been equidistantly spaced, the number of the Equations of The Second Kind adjustment hole comprising in each row is identical or not identical.
11. low noise high pressure differential regulating valves as claimed in claim 10, it is characterized in that, the number of the Equations of The Second Kind adjustment hole comprising in two adjacent row Equations of The Second Kind adjustment holes is not identical, and the number of the Equations of The Second Kind adjustment hole comprising in two row Equations of The Second Kind adjustment holes adjacent with each row Equations of The Second Kind adjustment hole is identical.
12. low noise high pressure differential regulating valves as claimed in claim 11, it is characterized in that, the described lower sleeve side wall surface 10 row Equations of The Second Kind adjustment holes that have been equidistantly spaced, wherein, 5 row Equations of The Second Kind adjustment holes comprise 3 Equations of The Second Kind adjustment holes, and other 5 row Equations of The Second Kind adjustment holes comprise 4 Equations of The Second Kind adjustment holes, each row Equations of The Second Kind adjustment hole space that includes different Equations of The Second Kind adjustment holes arranges.
13. low noise high pressure differential regulating valves as described in any one claim in claim 2-7, is characterized in that, a plurality of Equations of The Second Kind adjustment holes of offering on described lower sleeve bottom surface surround a plurality of annular rings around the center of described lower sleeve bottom surface.
14. low noise high pressure differential regulating valves as claimed in claim 13, it is characterized in that, a plurality of Equations of The Second Kind adjustment holes of offering on described lower sleeve bottom surface surround 5 annular rings around the center of described lower sleeve bottom surface, wherein, from-inner-to-outer ground, the number of the Equations of The Second Kind adjustment hole comprising on described 5 annular rings is respectively 4,8,16,16 and 16, and the axle center that surrounds a plurality of Equations of The Second Kind adjustment holes of same annular ring is distributed on this annular ring equally spacedly.
15. low noise high pressure differential regulating valves as described in any one claim in claim 1-7, it is characterized in that, a plurality of pressure compensation openings that are opened in described valve core inside comprise a plurality of large footpath pressure compensation openings and a plurality of path pressure compensation opening, described a plurality of large footpath pressure compensation opening and described a plurality of path pressure compensation opening surround the first annular ring and the second annular ring respectively around the center of described spool, wherein, the diameter of the first annular ring is greater than the diameter of the second annular ring.
16. low noise high pressure differential regulating valves as claimed in claim 15, it is characterized in that, the through hole that is opened in described valve core inside comprises 8 large footpath pressure compensation openings and 8 path pressure compensation openings, described 8 large footpath pressure compensation openings are distributed on the first annular ring being comprised of it equably, and described 8 path pressure compensation openings are distributed on the second annular ring being comprised of it equably.
17. low noise high pressure differential regulating valves as claimed in claim 2, it is characterized in that, described balanced seal ring comprises outside seal piece and the inner annular spring of being made by soft sealing material, the lower surface of described outside seal piece offers for the accommodating cavity of described inner annular spring, inside and outside sleeve, pressure at both sides hour, described upper bush and lower sleeve are that the deformation by the inner annular spring of described balanced seal ring is sealed, and when the inside and outside pressure at both sides of sleeve is larger, liquid medium can flow in described cavity and the described outside seal piece of being made by soft sealing material is strutted, thereby reach sealing effect.
18. low noise high pressure differential regulating valves as claimed in claim 1, is characterized in that, between the central through bore of described valve gap and described valve rod, are provided with stuffing box and Gland, are filled with packing spring and filler combination in described stuffing box.
19. low noise high pressure differential regulating valves as claimed in claim 18, it is characterized in that, outer annular groove and the inner annular groove offering respectively radially kept away in madial wall and the outside of described Gland bottom, in described outer annular groove, be provided with U-shaped circle, and in described inner annular groove, be provided with O type circle.
20. low noise high pressure differential regulating valves as claimed in claim 18, is characterized in that, described low noise high pressure differential regulating valve is also provided with dirt-proof boot, and described dirt-proof boot is sheathed on the periphery of described valve rod, and its bottom contacts with the top of described Gland.
21. low noise high pressure differential regulating valves as claimed in claim 20, is characterized in that, described Gland inner side surface is provided with the 3rd annular groove, for the bottom of described dirt-proof boot, are located in wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320714832.0U CN203585476U (en) | 2013-11-14 | 2013-11-14 | Low-noise high pressure difference regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320714832.0U CN203585476U (en) | 2013-11-14 | 2013-11-14 | Low-noise high pressure difference regulating valve |
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| Publication Number | Publication Date |
|---|---|
| CN203585476U true CN203585476U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320714832.0U Expired - Fee Related CN203585476U (en) | 2013-11-14 | 2013-11-14 | Low-noise high pressure difference regulating valve |
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| CN (1) | CN203585476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633201A (en) * | 2013-11-14 | 2015-05-20 | 上海铂嘉控制阀门有限公司 | Low-noise high-pressure-difference adjusting valve |
| CN106286920A (en) * | 2016-08-24 | 2017-01-04 | 天津大衍天成科技有限公司 | A kind of stagewise valve |
-
2013
- 2013-11-14 CN CN201320714832.0U patent/CN203585476U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633201A (en) * | 2013-11-14 | 2015-05-20 | 上海铂嘉控制阀门有限公司 | Low-noise high-pressure-difference adjusting valve |
| CN104633201B (en) * | 2013-11-14 | 2018-01-02 | 上海铂嘉控制阀门有限公司 | Low noise high pressure differential regulating valve |
| CN106286920A (en) * | 2016-08-24 | 2017-01-04 | 天津大衍天成科技有限公司 | A kind of stagewise valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190719 Address after: Room 405, No. 12, 600 Xinyuan South Road, Nicheng, Pudong New Area, Shanghai, 201306 Patentee after: Shanghai Pungjia Valve Co.,Ltd. Address before: No. 199-1 Luji Road, Luyuan Industrial Zone, Pudong New Area, Shanghai, 201322 Patentee before: PT-BRIDGE CONTROL VALVE CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20211114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |