CN100489358C - High differential pressure high accuracy cage type pressure regulating device - Google Patents
High differential pressure high accuracy cage type pressure regulating device Download PDFInfo
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- CN100489358C CN100489358C CNB2004100401183A CN200410040118A CN100489358C CN 100489358 C CN100489358 C CN 100489358C CN B2004100401183 A CNB2004100401183 A CN B2004100401183A CN 200410040118 A CN200410040118 A CN 200410040118A CN 100489358 C CN100489358 C CN 100489358C
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Abstract
This invention relates to a high pressure accurate basket booster used in gas transmission and to adjust gas pressure, which comprises main valve, stabilizing valve, bossing valve, wherein the main valve uses rubber film as drive structure and uses valve bar, core and socket as execution structure; the stabilizing valve is composed of valve case between upper and down covers and valve bar in the case and spring and rubber film; the main valve cover and core are matched with column steps designed as screw shape; the inner chamber is opened with ring gas tank without terminating sealed requirement.
Description
Technical field
The present invention relates to valve, particularly a kind of High Pressure Difference highi degree of accuracy cage pressure governor that is used for gas transmission and distribution system adjusting gaseous-pressure.
Background technique
At present, in gas transmission and distribution system, mostly adopt self-powering type pressure governor, axial flow pressure regulator and meander formula pressure governor to make gaseous-pressure and regulate.These pressure governors all be with rubber film as transmission device, when voltage regulator operation, self-powering type, axial flow pressure regulator are to utilize upper and lower film constant pressure difference to overcome spring sealed specific pressure to realize that pressure balance regulates; Meander formula pressure governor is to utilize upper and lower film constant pressure difference to overcome the spring reset effect to realize the pressure balance adjusting, and simultaneously, rubber film also will satisfy the shear action by seal action and medium channel hole of film pad passway.Like this, the pressure regulation range and the degree of regulation of pressure governor just are subjected to bigger limitation, also are subjected to very big influence working life, and particularly when regulating range of working pressure at the 6.3Mpa pressure level, rubber film intensity is difficult to satisfy usage requirement.
Summary of the invention
The objective of the invention is on the existing pressure governor basis that with the rubber film is transmission device, for further satisfying the degree of regulation and the regulation range of high pressure, big latus rectum pressure governor, prolong the working life of pressure governor, improve the work stress condition and the upper and lower film constant pressure difference equilibrium relation of rubber film, by to the improvement on traditional pressure governor principle design and the structural design, a kind of High Pressure Difference highi degree of accuracy cage pressure governor of regulating and blocking dual functions safely that possesses is proposed.The technological scheme that adopts is:
High Pressure Difference highi degree of accuracy cage pressure governor, form by main valve, pressure maintaining valve, command valve, wherein the valve pocket of main valve top is provided with the film pad, with the elastomer diaphragm is driving mechanism, valve rod, spool, valve seat are actuator, and valve core of main valve is a cylinder step plunger shape spool, and its upper and lower end face is communicated with by equalizing orifice, bottom end is embedded with nonmetal annular sealing gasket, forms sealing with valve seat conical surface raised head face and pays; Pressure maintaining valve wherein is mainly by the valve cap that is located between the upper and lower cover, and valve rod, spring, the elastomer diaphragm of device formed in the valve cap, pressure maintaining valve utilizes the effect of pressure medium and spring force, allow the variation of main valve inlet and outlet pressure that the pilot pressure of main valve film chamber is changed to the pressure stability direction that is tending towards setting, increase regulation range, reduce and regulate the surplus difference of pressure, improve degree of regulation; Command valve wherein is the variation according to the main valve inlet and outlet pressure, feeds back to command valve film chamber by signal tube, changes valve opening degree and changes, and realizes that pressure is regulated commander's control after and before the valve, it is characterized in that:
A. the valve pocket inner chamber of described main valve and spool are supporting is the cylinder stepped shape, valve pocket upper-end surface and upper end and valve rod external diameter cooperation place are respectively equipped with O shape circle, area pressure reduction when valve base cavity channel size and valve pocket cylinder step microcephaly consistent size, main valve are regulated pressure work is in state of equilibrium;
B. the film pad of described main valve is designed to the butterfly disk, the middle part perforate, film pad inner chamber has annular air storing duct, do not establish the medium channel hole on the film pad, pore is offered in annular air storing duct lateral part on the film pad, and during high-pressure regulation, pressure medium passes through pore, under the effect of valve pocket and valve rod cooperation place O shape circle, make elastomer diaphragm lower end and valve pocket upper-end surface and air inlet pressure medium constitute sealed air chamber;
C. described pressure maintaining valve constitutes two air chambers by top inner chamber, loam cake, upper diaphragm, the upper spring of last valve cap, by lower cover, down valve cap, diaphragm, lower spring and the lower lumen that goes up valve cap are formed two balance air chambers under the connection effect of the blind hole of valve rod and the lower-side hole that communicates with blind hole, upper-side hole down, the upper and lower diaphragm of valve rod and upper and lower valve cap and spring interaction fuse.
The technical characteristics that the present invention can also have is: can not establish pore on the film pad of described main valve, at the other through hole of establishing up/down perforation of valve pocket upper end mesopore side, when mesolow is regulated, pressure medium makes elastomer diaphragm lower end and spool upper end and air inlet pressure medium constitute sealed air chamber by spool equalizing orifice and valve pocket upper end through hole.
The present invention compared with prior art has following outstanding advantage and technique effect:
One, there is not the medium channel hole on the film pad, elastomer diaphragm is not done by seal request, when having avoided closing in the sealing channel hole suffered sealing shearing force, butterfly film pad inner chamber has annular air storing duct, be beneficial to and realize that main valve opens, for elastomer diaphragm in the balance air chamber that not washed away by medium, realize transmission agency, basic operating conditions is provided, has prolonged the working life of elastomer diaphragm.
Pressure reduction was little when two, the elastomer diaphragm transmission was worked, its value is that Returnning spring power is divided by effective diaphragm area, operating pressure differential is not subjected to the inlet and outlet pressure variable effect, can satisfy high pressure inlet and outlet pressure regulatory function, regulates range of working pressure and can reach more than the 6.3Mpa pressure level.
Three, the main valve film pad lower chamber balance that communicates with inlet pressure, the air chamber medium does not flow, the turbulent phenomenon of having avoided media flow to cause, when making the upper and lower air chamber adjustment of main valve film pad, good stability, it is little to fluctuate, the degree of regulation height.
Four, valve core of main valve, valve seat adopt matched seal to pay, under the effect of spool equalizing orifice, and spool upper and lower end stress balance, very little seal pressure power can realize sealing zero leakage.
Five, main valve is according to pressure medium height and usage requirement; utilizing the different medium flow direction and structural feature to satisfy other pressure of different pressures level respectively regulates; and when being implemented in the work of high and low pressure medium, as the elastomer diaphragm damaged condition appears, main valve still can block protection by automatic safe.
Six, pressure maintaining valve can make main valve upper film chamber pilot pressure always be tending towards the downstream pressure stabilising direction and change according to changes in flow rate behind upstream pressure variation and the valve.Pressure characteristics and Flow characteristics advantage are outstanding, and the adjusting pressure range is wide.Precision of voltage regulation height, closing pressure is much smaller than conventional regulator.
The above, pressure governor of the present invention is by the scientific and reasonable design of main valve drive mechanism and execution architecture, the innovation of Principles of Regulation, regulate the stable compensation of pressure, pressure governor of the present invention is compared all with traditional pressure governor at aspects such as regulating latus rectum, adjusting pressure, regulation range, degree of regulation and working life to be had than quantum jump.
Description of drawings
Fig. 1 is the structural representation of one of embodiment of the invention;
Fig. 2 is two a structural representation of the embodiment of the invention;
Fig. 3 is the pressure maintaining valve structural representation among Fig. 1, Fig. 2.
Fig. 1, label shown in Figure 2 (main valve partly): 1-bonnet, 2-spring, 3-elastomer diaphragm, 4-O shape circle, 5-pipe joint, 6-pipe joint, the 7-signal tube, 8-valve pocket, 9-spool, the 10-valve seat, 11-valve body, 12-lower cover, the 13-bolt, 14-sleeve gasket, 15-Gask-O-Seal, the 16-equalizing orifice, 17-O shape circle, 18-valve rod, 19-O shape circle, 20-O shape circle, 21-film pad, the 22-press table, 23-top board, 24-signal pole, 40-annular air storing duct, 41-pressure maintaining valve, 42-command valve, φ 1-pore, φ 2-side opening, φ 3-through hole.
Label shown in Figure 3 (pressure maintaining valve partly): 25-loam cake, 26-spring seat, 27-upper diaphragm, the last valve cap of 28-, 29-O shape circle, 30-lower spring, valve cap under the 31-, 32-lower cover, 33-filter screen, diaphragm under the 34-, 35-blind hole, 36-valve rod, 37-O shape circle, 38-upper spring, 39-adjusting screw rod, φ 4-lower-side hole, φ 5-upper-side hole.
Embodiment
The invention will be further described according to accompanying drawing embodiment below:
Figure 1 shows that one of embodiments of the invention, pressure governor of the present invention is by main valve and be located at pressure maintaining valve 41 on the main valve and command valve 42 3 is partly formed, wherein valve pocket 8 tops of main valve are provided with film pad 21, with elastomer diaphragm 3 is driving mechanism, valve rod 18, spool 9, valve seat 10 is an actuator, spool 9 is a cylinder step plunger shape spool, on it, the lower end surface is communicated with by equalizing orifice 16, bottom end is embedded with nonmetal annular sealing gasket 15, form sealing with the conical surface raised head face of valve seat 10 and pay, pressure maintaining valve 41 wherein is mainly by on being located at, the valve rod of device in valve cap between the lower cover and the valve cap, spring, compositions such as elastomer diaphragm.
The effect of pressure maintaining valve 41 is the effects that utilize pressure medium and spring force, allow the variation of main valve inlet and outlet pressure that the pilot pressure of main valve film chamber is changed to the pressure stability direction that is tending towards setting, increase regulation range, reduce and regulate the surplus difference of pressure, improve degree of regulation; The effect of command valve is the variation according to the main valve inlet and outlet pressure, feed back to command valve film chamber by signal tube, changing valve opening degree changes, realize that pressure is regulated commander's control after and before the valve, basic identical in view of the working principle and the structure characteristic of command valve of the present invention and existing like product, omit description in the embodiments of the invention to its structure characteristic.
Main valve is made up of main members such as valve body 11, valve seat 10, spool 9, valve rod 18, valve pocket 8, film pad 21, elastomer diaphragms 3, the lower end of valve body 11 is by lower cover 12 sealings, the upper end of valve body 11 connects bonnet 1, and and elastomer diaphragm 3 form the control air chambers, film pad 21 and annular air storing duct 40 and elastomer diaphragm 3 Compositional balance air chambers, the main valve import connects pressure maintaining valve 41, and outlet connects command valve 42.
Spool 9 is a cylinder step piston structure, have equalizing orifice 16 on the spool 9, spool bottom and upper end are communicated, spool 9 bottom inner chambers are embedded with Gask-O-Seal 15, form sealing with valve seat 10 raised head faces and pay, Gask-O-Seal 15 is selected nonmetallic material such as rubber or fluoroplastic for use.
The film pad 21 of main valve is designed to the butterfly disk, the middle part perforate, butterfly film pad inner chamber has annular air storing duct 40, do not establish the medium channel hole on the film pad 21, pore φ 1 is offered in annular air storing duct 40 lateral parts on the film pad 21, and during high-pressure regulation, pressure medium is by pore φ 1, enclose under 19 effects the O shape of valve pocket 8, make elastomer diaphragm 3 lower ends and valve pocket 8 upper-end surfaces and air inlet pressure medium constitute sealed air chamber with valve rod 18 cooperation places.
When high pressure is regulated; for avoiding medium washing away and protect the sealing reliability of main valve when safety is blocked protective action to spool 9 soft sealing faces; medium is from the main valve high in and low out; the O shape of valve pocket 8 upper ends circle 19,20 can satisfy that pressure medium forms sealed air chamber in valve pocket 8 structures upper end when film cushion steam hole φ 1 enters elastomer diaphragm 3 cavity of resorptions and medium does not flow, and air chamber pressure equals the air inlet pressure medium.The downward directed force F of the control air chamber that elastomer diaphragm 3 upper ends and bonnet 1 are formed
DownWith control air chamber pressure P
3, elastomer diaphragm 3 useful area S, Returnning spring power F
Bullet, spool 9 microcephaly's end area S
1, valve rod area S
Bar, main valve outlet pressure P
2Relevant, i.e. F
Down=P
3S+F
Bullet+ P
2(S
1-S
Bar).The sealed air chamber that elastomer diaphragm 3 and valve pocket 8 upper ends the are formed directed force F that makes progress
OnWith air inlet pressure medium P
1, Effective Area of Rubber Film S, valve rod area S
BarRelevant, i.e. F
On=P
1(S-S
Bar)+P
2S
1Regulate command valve 42 and make outlet pressure reach setting value, regulate pressure maintaining valve 41 again and make it satisfy suction pressure variation and rate of discharge variation P
2Stablize constant, elastomer diaphragm 3 upper and lower air chamber balance, i.e. P at this moment
1(S-S
Bar)+P
2S
1=P
3S+F
Bullet+ P
2(S
1-S
Bar).Because S
BarMuch smaller than S, S
BarWhen area is ignored, its equilibrium conditions P
1S+P
2S
1=P
3S+F
Bullet+ P
2S
1Lower chamber pressure differential deltap P=P on the elastomer diaphragm 3
1-P
3=F
Bullet/ S.Lower chamber pressure reduction is main relevant with the useful area of Returnning spring power and elastomer diaphragm 3 on the elastomer diaphragm 3, can satisfy the long lifetime service condition of elastomer diaphragm under the high pressure adjusting situation during designing and calculating fully, makes Δ P value much smaller than traditional pressure governor specified value.
When the downstream end subscriber quits work, pressure governor outlet pressure medium P
2Raise P
2The variation of value feeds back to command valve 42 by signal tube 7, works as P
2Command valve was closed when value was elevated to the closing pressure value, and the lower chamber medium does not flow on the main valve elastomer diaphragm 3, and its pressure equals the air inlet pressure medium.Under Returnning spring 2 effects, nonmetallic ring pad 15 end faces that valve core of main valve 9 lower end inner chambers embed are close to the raised head face of valve seat 10.Main valve air inlet pressure medium acts on the downward lifting surface area of cylinder step plungers valve core 9 greater than the lifting surface area that makes progress, and the medium high in and low out, is beneficial to main valve and realizes self-energized seal under condition of high voltage, and main valve is closed automatically.If elastomer diaphragm 3 damages in the high-pressure regulation work; upper and lower air chamber communicates; upper and lower air chamber pressure equals the air inlet pressure medium; to close the principle that upper and lower air chamber pressure equates identical with command valve 42; main valve blocks automatically under Returnning spring 2 effects and closes, thereby has satisfied the high pressure pressure regulation and blocked the realization of protecting dual functions safely.
The pressure governor main valve is closed when opening again, because the butterfly end face of film pad 21 has annular air storing duct 40, makes the stress balance condition when opening or closing constant, can guarantee to open and close light and flexible in the High Pressure Difference regulation range.
Figure 2 shows that two of embodiments of the invention, be that the present invention is used for the example that mesolow is regulated, its main structure feature is identical with embodiment one, when pressure medium is low, medium is not obvious especially to the souring of the nonmetal annular sealing gasket 15 of spool, it is important that degree of regulation more seems when gas transmission and distribution, the medium low in and high out.At this moment, the microcephaly of valve core of main valve 9 holds diameter and valve seat 10 bore passages consistent size, film pad 21 is not offered the bypass pore except that mesopore, valve pocket 8 does not have O shape groove with valve rod 18 cooperation places, the other through hole φ 3 that offers of valve pocket 8 upper ends and valve rod 18 mesopore sides, medium enters elastomer diaphragm 3 lower ends and spool 9 upper ends by spool equalizing orifice 16, side opening φ 2, through hole φ 3, constitute sealed air chamber with the air inlet pressure medium, and pressure medium equals the air inlet pressure medium.Spool 9 upper and lower end pressure complete equilibriums, the stressed useful area of lower chamber is equal fully on the elastomer diaphragm 3.Regulate command valve 42 and pressure maintaining valve 41, main valve outlet pressure P
2Stable, elastomer diaphragm 3 upper gas chamber active forces are pilot pressure P
3Multiply by elastomer diaphragm 3 useful area S and add spring force, elastomer diaphragm 3 lower chambers are air inlet pressure medium P
1Multiply by elastomer diaphragm 3 useful area S, during upper and lower air chamber balance, P
3S+F
Bullet=P
1S, upper and lower air chamber pressure differential deltap P=P
1-P
3=F
Bullet/ S.This shows, during the pressure medium low in and high out, lower chamber pressure reduction is only relevant with elastomer diaphragm 3 useful area with spring force on the elastomer diaphragm 3, irrelevant with the import and export pressure medium, the design load of its elastomer diaphragm pressure difference Δ P is much smaller than traditional pressure governor master gage definite value, the operating conditions of elastomer diaphragm improves fully, manufactures and designs the easier long lifetime usage requirement of satisfying, and also more can guarantee High Pressure Difference, highi degree of accuracy adjusting usage requirement.
If elastomer diaphragm 3 damaged conditions, because pressure medium is lower, seal pressure power is less, and under Returnning spring 2 effects, the main valve automatic safe blocks.
Fig. 3 is the structural diagrams of pressure maintaining valve 41, pressure maintaining valve 41 mainly is made up of lower cover 32, time valve cap 31, last valve cap 28, valve rod 36, loam cake 25, upper diaphragm 27, following diaphragm 34, adjusting screw rod 39, the valve rod bottom is the conical surface, the centre has blind hole 35, and the upper and lower end of corresponding blind hole has upper-side hole φ 5 and lower-side hole φ 4.The lower lumen of last valve cap 28 is formed two balance air chambers under the connection effect of valve rod blind hole 35 and lower-side hole φ 4, upper-side hole φ 5, constitute two air chambers by top inner chamber, loam cake 25, upper diaphragm 27, the upper spring 38 of last valve cap 28.Valve rod 36 passes through upper diaphragm 27 and following diaphragm 34, under lower spring 30 and upper spring 38 effects, and can be with suction pressure P
1With main valve outlet pressure P
2Variation produce upper and lower displacement, the regulating valve stem 36 bottom conical surfaces and lower cover upper-end surface aperture change, and make the pilot pressure that enters main valve upper end air chamber always to being tending towards making main valve outlet pressure P
2Stabilising direction changes.
Suction pressure P
1During variation, break the balanced action power of lower spring 30 and upper spring 38 and upper diaphragm 27 and following diaphragm 34, move or move down on the valve rod 36, change, enter the suction pressure P of main valve elastomer diaphragm 3 upper ends by valve rod 36 bottom conical surface apertures
3Change, main valve elastomer diaphragm 3 upper and lower end air chamber pressures are balance again, and the valve core of main valve bottom is moved or moved down on the aperture of valve seat 10 raised head faces, main valve outlet pressure P
2Change to being tending towards former setting outlet pressure value direction, under command valve 42 actings in conjunction, main valve outlet pressure P
2Surplus difference is minimum, substantially not with P
1Change and change, still keep former setup pressure value.
When the main valve rate of discharge changes, cause main valve outlet pressure P
2Change, by outlet pressure P
2Connect pressure maintaining valve 41 air chambers, under pressure maintaining valve upper diaphragm 27 and upper spring 38 acted on, valve rod 36 bottom end apertures changed, and enter the suction pressure P of main valve elastomer diaphragm 3 upper ends
3Change, in like manner, main valve outlet pressure P
2Do not change, still keep former setup pressure value with rate of discharge.
This shows that the effect of pressure maintaining valve 41 is further auxiliary command valves 42, has realized main valve outlet pressure P
2Be not subjected to inlet pressure P
1Influence with rate of discharge changes can realize the highi degree of accuracy adjusting in the big range of regulation of main valve inlet/outlet.Pressure maintaining valve all feeds back to the main valve pilot pressure to the variation in pressure after and before the valve of main valve, the main valve pilot pressure again at command valve according to outlet pressure P
2Under the feedback effect, make the variation of pilot pressure always be tending towards the P of former setting
2The value stabilization direction changes, and it is idealized that the Pressure characteristics of pressure governor and Flow characteristics more are tending towards, and makes regulation range wideer, and degree of regulation is higher.
Claims (2)
1, a kind of High Pressure Difference highi degree of accuracy cage pressure governor, by main valve and be located at pressure maintaining valve (41) on the main valve, command valve (42) is formed, wherein the valve pocket of main valve (8) top is provided with film pad (21), with elastomer diaphragm (3) is driving mechanism, valve rod (18), spool (9), valve seat (10) is an actuator, spool (9) is a cylinder step plunger shape spool, on it, the lower end surface is communicated with by equalizing orifice (16), bottom end is embedded with nonmetal annular sealing gasket (15), forming sealing with the conical surface raised head face of valve seat (10) pays, pressure maintaining valve wherein (41) is mainly by on being located at, valve cap between the lower cover, and the valve rod that is provided with in the valve cap, spring, elastomer diaphragm is formed, and it is characterized in that:
A. the valve pocket of described main valve (8) inner chamber and spool (9) are supporting is the cylinder stepped shape, valve seat (10) bore passages size and valve pocket (8) cylinder step microcephaly consistent size, and the area pressure reduction when main valve is regulated pressure work is in state of equilibrium;
B. the film pad (21) of described main valve is the butterfly disk, the middle part perforate, and film pad (21) inner chamber has annular air storing duct (40), and the film pad is not established the medium channel hole on (21), and the lateral part that film pad (21) is gone up annular air storing duct (40) is provided with pore (φ 1);
C. described pressure maintaining valve (41) constitutes two air chambers by the top inner chamber of last valve cap (28), loam cake (25), upper diaphragm (27), upper spring (38), by lower cover (32), down valve cap (31), diaphragm (34), lower spring (30) and the lower lumen that goes up valve cap (28) are formed two balance air chambers under the connection effect of the blind hole (35) of valve rod (36) and lower-side hole (φ 4), upper-side hole (φ 5) down.
2, a kind of High Pressure Difference highi degree of accuracy cage pressure governor, by main valve and be located at pressure maintaining valve (41) on the main valve, command valve (42) is formed, wherein the valve pocket of main valve (8) top is provided with film pad (21), with elastomer diaphragm (3) is driving mechanism, valve rod (18), spool (9), valve seat (10) is an actuator, spool (9) is a cylinder step plunger shape spool, on it, the lower end surface is communicated with by equalizing orifice (16), bottom end is embedded with nonmetal annular sealing gasket (15), forming sealing with the conical surface raised head face of valve seat (10) pays, pressure maintaining valve wherein (41) is mainly by on being located at, valve cap between the lower cover, and the valve rod that is provided with in the valve cap, spring, elastomer diaphragm is formed, and it is characterized in that:
A. the valve pocket of described main valve (8) inner chamber and spool (9) are supporting is the cylinder stepped shape, valve seat (10) bore passages size and valve pocket (8) cylinder step microcephaly consistent size, and the area pressure reduction when main valve is regulated pressure work is in state of equilibrium;
B. the film pad (21) of described main valve is the butterfly disk, the middle part perforate, and film pad (21) inner chamber has annular air storing duct (40), and the film pad is not established the medium channel hole on (21);
C. described pressure maintaining valve (41) constitutes two air chambers by the top inner chamber of last valve cap (28), loam cake (25), upper diaphragm (27), upper spring (38), by lower cover (32), down valve cap (31), diaphragm (34), lower spring (30) and the lower lumen that goes up valve cap (28) are formed two balance air chambers under the connection effect of the blind hole (35) of valve rod (36) and lower-side hole (φ 4), upper-side hole (φ 5) down;
D. the film pad (21) of described main valve is not upward established pore (φ 1) in the lateral part of annular air storing duct (40), the other through hole (φ 3) of offering of valve pocket (8) upper end mesopore side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401183A CN100489358C (en) | 2004-07-05 | 2004-07-05 | High differential pressure high accuracy cage type pressure regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401183A CN100489358C (en) | 2004-07-05 | 2004-07-05 | High differential pressure high accuracy cage type pressure regulating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1721750A CN1721750A (en) | 2006-01-18 |
| CN100489358C true CN100489358C (en) | 2009-05-20 |
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ID=35912258
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100401183A Active CN100489358C (en) | 2004-07-05 | 2004-07-05 | High differential pressure high accuracy cage type pressure regulating device |
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| CN (1) | CN100489358C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520136C (en) * | 2007-06-26 | 2009-07-29 | 河海大学 | Batch pressure-differential controlling valve |
| CN101709801B (en) * | 2009-11-19 | 2011-05-04 | 浙江沃尔达铜业有限公司 | Dynamic differential pressure balanced control valve |
| CN104500800A (en) * | 2014-12-30 | 2015-04-08 | 特瑞斯能源装备股份有限公司 | Axial flow pressure regulator |
| CN109340446B (en) * | 2018-11-26 | 2023-12-22 | 乐山川天燃气输配设备有限公司 | Indirect acting voltage regulator |
| CN111998090B (en) * | 2020-08-31 | 2022-04-12 | 江苏亿阀股份有限公司 | Integrated internal bypass high-pressure low-torque opening and closing ball valve and installation method thereof |
-
2004
- 2004-07-05 CN CNB2004100401183A patent/CN100489358C/en active Active
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| CN1721750A (en) | 2006-01-18 |
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Assignee: Leshan Changyi Valve Manufacturing Co., Ltd. Assignor: Wang Yuanqing|Wang Yuanyi Contract record no.: 2011510000228 Denomination of invention: High differential pressure high accuracy cage type pressure regulating device Granted publication date: 20090520 License type: Exclusive License Open date: 20060118 Record date: 20110828 |
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| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: WANG YUANYI Effective date: 20140402 Owner name: SICHUAN CHANGYI OIL-GAS GATHERING TRANSPORTAION EQ Free format text: FORMER OWNER: WANG YUANQING Effective date: 20140402 |
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Effective date of registration: 20140402 Address after: 614000 Leshan City, Central District, Sichuan Le Lok Road, No. 16 Patentee after: SICHUAN CHANGYI OIL-GAS CATHERING TRANSPORTATION EQUIPMENT CO., LTD. Address before: 614000 Sichuan Province, Leshan City District Road No. 56 hundred Changyi valve company Patentee before: Wang Yuanqing Patentee before: Wang Yuanyi |