CN101270829A - Embedded valve container type adjustable dynamic flow equalizing valve - Google Patents
Embedded valve container type adjustable dynamic flow equalizing valve Download PDFInfo
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- CN101270829A CN101270829A CNA2008100159582A CN200810015958A CN101270829A CN 101270829 A CN101270829 A CN 101270829A CN A2008100159582 A CNA2008100159582 A CN A2008100159582A CN 200810015958 A CN200810015958 A CN 200810015958A CN 101270829 A CN101270829 A CN 101270829A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims abstract description 12
- 238000012546 transfer Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000013461 design Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 9
- 210000003027 ear inner Anatomy 0.000 description 8
- 210000000232 gallbladder Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention discloses an adjustable dynamic flow balance valve with an internal lining, which has the function of the dynamic flow balance valve and can adjust the flow capacity passing the valve within certain pressure difference according to the requirement. The invention comprises a valve body, the internal detachable valve lining, a gland cover, a connecting rod and an actuator. The valve lining is fixedly mounted inside the valve body. The connecting rod connected with the valve lining drills through the upper gland cover to be connected with an adjusting handle or the actuator. The opening degree of the valve is controlled for adjusting the flow capacity. The valve lining comprises a pressure sensing board, a pressure regulating slide sleeve, an internal spring, an external spring, the upper end cap with the correction conical surface of the valve lining, a current regulating cylinder body and a lower cylinder body. The invention has the advantages of large current regulating range, large flow capacity, high control precision, broad working pressure difference, convenient assembly, long service life, detachable valve lining and low manufacture cost. The invention can be applied to the central air conditioner, the water system of the heating network, petroleum industry, chemical industry and electric power plant, fundamentally solving the problem of hydraulic disorder and meeting the requirement of flow control.
Description
Technical field
The present invention relates to a kind of valve of control flow rate, in particular, transfer the attitude flow balance valve but relate to the built-in valve courage of a kind of highi degree of accuracy formula school.
Background technique
The phenomenon of the hydraulic misadjustment that ubiquity in the fluid transmission and distribution network will be brought following harm: (1) actual flow and design discharge are not inconsistent, and influence pipe network work effect.As in heating and central air conditioning water system, owing to there is the phenomenon of hydraulic misadjustment, cause that terminal flow is too small or excessive, cause phenomenon uneven in temperature, directly influence heating and air-conditioning effect, cause customer complaint.(2) can cause the damage of pipe network equipment, cause fault, severe patient can be accidents caused.Too high flow can produce bigger impact to pipeline and equipment, and produces vibration and noise, influences the pipe network life-span, causes the damage of pipe network equipment.Too small flow can cause the shutdown or the protection of equipment equally, makes the pipe network cisco unity malfunction.In some producibility pipe networks, as blast-furnace cooled water system of iron and steel enterprise, too small cooling water flow can cause security incident.(3) cause the lot of energy waste.Some pipeline section or equipment surpass design discharge in the pipe network, can cause the waste of energy, and some pipeline flow is too small, for satisfying need of work, often adopt the method that increases pump power, cause the increase of energy consumption.
The factor that causes the pipe network hydraulic misadjustment is a lot, mainly contain following some: (1) hydraulically balanced calculating inaccuracy.Paid attention to the resistance of index circuit, and the available pressure of other loop causes the current short circuit greater than desirable value, thus the water system disequilibrium.(2) though hydraulically balanced calculating is accurate,, can not eliminate the variation of pipe resistance by the variation of caliber owing to be subjected to the restriction of caliber specification; The local resistance of each several parts such as the valve in the pipeline, end equipment may be different with product simultaneously, also may have problems in the construction.(3) type selecting of water pump is improper, causes its actual operating point off-design operating point.(4) exist dynamic variation in the water system pipe network, the adjusting of user's water flow changes, and will cause the waterpower imbalance that whole system is effective.(4) the old system reform, be incorporated into the power networks year by year, pipe network system that the heating and cooling area enlarges year by year, disposable EQUILIBRIUM CALCULATION FOR PROCESS or auxiliary restricting orifice are impracticable, also can cause hydraulic misadjustment.
The measure that solves hydraulic misadjustment has following several usually: (1) installs manual modulation valve (common regulating valve, quiescent flow equilibrium valve).Before using, system needs to say capable preconditioning.Flow instrument differential pressure controller one-level one-level by special use is carried out, and must guarantee that having only upper level to debug just can carry out the debugging of next stage simultaneously.The debugging of system bothers very much.Particularly big system.And.Water system can not change after debugging was finished, otherwise needed debugging again, and obviously this is impossible.(2) restricting orifice is installed.Eliminate certain pressure by restricting orifice, keep hydraulic equilibrium, but this method can not solve the hydraulic misadjustment phenomenon fully, restricting orifice is used also inconvenience simultaneously.Hole I:1 easily stops up, can not adjusted drainage the dynamic change of system.(3) this method of flow of increasing water pump makes water system be in big flow, the running state of the little temperature difference. and pump power is greater than design power, and it is more to consume energy, and only just can use under unavoidable situation.(4) dynamic flow balance valve is installed.It does not need system is carried out just regulating, according to design discharge and type selecting.The reference product chart can be once or automatic setting stream clamor, satisfy usage requirement, save design and adjusting time, hydraulic stability is good, degree of regulation maintains ± 5% this type of valve has the use practical experience in 30 years abroad, just use at home.
At present, the dynamic flow balance valve technology is designed department gradually and accepts, and will be used for actual engineering more and more widely, and dynamic flow balance valve is called self-operated flow control valve again, have higher technical requirements and content, belong to a neocategory in the modulating valve.Current, only there are American-European three companies grasping the core technology of dynamic flow balance valve in the world, the dynamic flow balance valve product of other brands all provides critical component by this three company.Owing to relate to the technical protection problem, the paper of discussing the dynamic flow balance valve structural design abroad is less.The main dependence on import in domestic automatic flow control valve market, price is very high, part manufacturer production imitation products is also arranged, but owing to do not have the theory of system as guidance, its product operating pressure differential scope is little, flow control accuracy is low, and has serious vibrating noise, can't satisfy the needs of actual engineering.Domestic have many researchs, is confined to application mostly, and structure, flow field and motion thereof and the dynamic property research of valve itself is belonged to blank.Fixed dynamic flow balance valve, keep a normal value though can effectively control the flow that passes through, but because flow value is locked, therefore only be applicable in constant flow rate and its design discharge known pipeline and equipment, under the situation that pipeline unsteady flow amount design at present increases gradually, its application area is restricted.Though occurred the dynamic balance motor-driven modulating valve of foreign brand name now on the market, it is easy to generate vibration, lacks working life, and the easy fatigue failure of its inner elastomer diaphragm becomes its bottleneck of applying of restriction.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, but propose a kind of built-in valve courage formula school and transfer the attitude flow balance valve, this equilibrium valve can be by the aperture of lever regulated valve courage, set required flow, guarantee that simultaneously this corresponding flow is constant in the pressure differential range that allows, be not subjected to other loops or terminal water flow to change the influence that causes that system pressure changes, make the transient equiliblium design of flow-changing water system be achieved.
For achieving the above object, the present invention adopts following technological scheme:
But the attitude flow balance valve is transferred in a kind of built-in valve courage formula school, it comprises valve body, valve courage, top cover labyrinth, sealing gland and connecting rod, stretch out valve after wherein connecting rod connection valve courage passes top cover labyrinth and sealing gland successively, be connected aperture with regulating handle or final controlling element with control valve.
Described valve courage connects firmly by fastening screw trip bolt and valve body.
Described top cover labyrinth and valve body screw thread are installed, and sealing gland and top cover labyrinth screw thread are installed.
Described valve courage is made up of valve courage upper end cap, pressure-sensitive plate, fastening screw trip bolt, flow-stopping plate, positioning shaft, accent stream cylindrical shell, inner spring, outer spring, lower cylinder body, pressure regulation slide cartridge, location lining.Valve courage upper end cap with transfer the stream cylindrical shell to connect firmly to form to transfer the stream tube by Cock screw, by regulating the position of stream tube, can change the relative position of transferring between stream tube and the valve courage lower cylinder body, thereby change the circulation area of its side-wall hole, reach the purpose of adjusting flow.
Described pressure-sensitive plate and pressure regulation slide cartridge connect firmly by the location lining, are sleeved on the positioning shaft; Suit inner spring on axle, suit outer spring outside pressure-sensitive plate lining; Pressure reduction between pressure-sensitive plate Inductance valve gallbladder intracavity and the last exocoel, with inside and outside spring action equilibrium of forces, when pressure reduction changes, spring takes place flexible, the pressure-sensitive Board position changes, drive the pressure regulation slide cartridge and slide, change the circulation area of lower cylinder body side-wall hole, reach the purpose of regulating pressure along the lower cylinder body inwall.
Between pressure-sensitive plate and valve gallbladder intracavity, establish flow-stopping plate and transfer the current plate that flows cylindrical shell, be used for the stable cavity internal pressure, have some apertures on the current plate.
Described positioning shaft and lower cylinder body connect firmly by nut, and positioning shaft has a step to be used for the inner spring location.
Described valve courage upper end cap inwall is processed into the conical surface, when the pressure-sensitive Board position changes, changes the circulation area between the pressure-sensitive plate and the conical surface, plays the effect of modified flow rate.
The invention has the beneficial effects as follows: the flow accuracy height, the operating pressure differential scope is wide, and is simple and reliable for structure, and the life-span is long, and installation, maintenance is convenient.Remedy blank both at home and abroad, can satisfy requirement of engineering, have the bigger prospect of promoting the use of.
Description of drawings
Ssembly drawing when Fig. 1 is valve courage aperture 100%;
Fig. 2 is the ssembly drawing of valve;
Fig. 3 is the flow-pressure differential performance schematic representation of valve.
Among the figure: 1. valve courage upper end cap, 2. pressure-sensitive plate, 3. fastening screw trip bolt, 4. flow-stopping plate, 5. positioning shaft is 6. transferred the stream cylindrical shell, 7. inner spring, 8. outer spring, 9. lower cylinder body, 10. pressure regulation slide cartridge, 11. location linings, 12. connecting rods, 13. sealing gland, 14. top cover labyrinths, 15. valve bodies, 16. fastening screw trip bolt, 17. valve courages.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, the dynamic flow balance valve of built-in valve courage formula, it comprises compositions such as valve body 15, valve courage 17, top cover labyrinth 14, sealing gland 13, connecting rod 12, fastening screw trip bolt 16.Valve courage 17 is fixed on valve body 15 inside by fastening screw trip bolt 16, and dismounting is separately stretched out top cover labyrinth 14 and sealing gland 13 by connecting rod 12, can regulate by regulating 12 pairs of valve courage 17 apertures of connecting rod.The valve courage 17 usefulness fastening screw trip bolts 16 of this valve are fixed on valve body 15 inner chambers, and extension connecting rod 12 utilizes sealing gland 13 and V-type seal with elastometic washer connecting rod so that the aperture of regulating valve has top cover labyrinth 14 usefulness screw threads and valve body 15 fit sealings together on it.Valve courage 17 is critical components of this valve.
Among Fig. 2, have flowing hole on the lower cylinder body 9 of valve courage 17 and the accent stream cylindrical shell 6, have the conical surface replenishing and finely tuning on the valve courage upper end cap 1 as water outlet through calculating.
Valve courage upper end cap 1 in the valve courage 17, transfer stream cylindrical shell 6, pressure-sensitive plate 2, flow-stopping plate 4, pressure regulation slide cartridge 10, inner spring 7, outer springs 8 to link together, when connecting rod 12 was up and down, its assembly was also up and down, the aperture of regulating valve.
Be a coaxial hollow body in the valve courage 17, transferring spiral inner spring 7, the outer spring 8 that accurate Calculation is arranged respectively between stream cylindrical shell 6 and the pressure regulation slide cartridge 10.
Two ends, lower cylinder body 9 bottom are fixed thereon positioning shaft 5 with location lining 11 and nut; Valve courage upper end cap 1 and accent stream cylindrical shell 6 usefulness Cock screws 3 are fixed together; Pressure-sensitive plate 2 and pressure regulation slide cartridge 10 usefulness Cock screws are fixed together.
But the present invention also provides a kind of highi degree of accuracy school to transfer attitude flow balance valve computational methods.
When being a certain fixed value for demand volume:
1, the valve left side is a water intake, and in the outside of valve courage lower cylinder body 9, intake pressure is P
1Water enters the valve gallbladder intracavity from lower cylinder body 9 water inlets of valve courage bottom, and its pressure is P
2At the accent stream cylindrical shell 6 of valve courage and the outside and the water outlet place of valve courage upper end cap 1, its pressure is P
3The pressure difference Δ P=Δ P at valve two ends
12+ Δ P
23, the present invention adopts Δ P
23Be designed to definite value, Δ P
12Change with Δ P.
2, for the lower cylinder body 9 of valve courage, outside water intake pressure is P
1, valve gallbladder intracavity pressure is P
2, the pressure at two ends difference is Δ P
12, according to flow formula
Demand volume q, flow coefficient ξ are definite value, and pressure differential deltap P
12Changing, so area of passage A need change with pressure reduction with system's pressure reduction.
3, for the accent stream cylindrical shell 6 and valve courage upper end cap 1 of valve courage, valve courage internal pressure is P
2, outside water outlet pressure is P
3According to flow formula
Flow of requirement q, flow coefficient ξ are definite value, and pressure differential deltap P
23Be definite value, so area of passage A does not need to change.
When demand volume need increase or diminish:
For the accent stream cylindrical shell 6 and valve courage upper end cap 1 of valve courage, valve courage internal pressure is P
2, outside water outlet pressure is P
3According to flow formula
Flow coefficient ξ is a definite value, and pressure differential deltap P
23Be definite value, when demand volume q increases or diminishes, only need area of passage A along with becoming big or diminishing.And this valve can be by the outside the aperture of connecting rod 12 control valves reach requirement.
Structure of the present invention is Δ P at pressure reduction
a-Δ P
bIn the scope, valve is regulated in aperture 20-100% scope arbitrarily, and flow is linear change along with the variation of aperture, flow control accuracy reaches ± and 5%.
The meaning of above-mentioned parameter variable:
(1) Δ P: the instant pressure difference at valve two ends
(2) Δ P
a: the minimum working pressure power at valve two ends is poor
(3) Δ P
b: the maximum service pressure at valve two ends is poor
(4) P
1: the pressure of the valve water intake that system is given
(5) P
2: the pressure of valve gallbladder intracavity
(6) P
3: the pressure of the valve outlet that system is given
(7) Δ P
12: the pressure difference between valve water intake and the valve gallbladder intracavity
(8) Δ P
23: the pressure difference between valve gallbladder intracavity and the valve outlet
(9) q: pipeline demand volume
(10) ξ: flow coefficient, can demarcate by test, with reynolds' number R
eRelevant
(11) A
1: the area of passage of valve courage water outlet
(12) A
2: the area of passage of valve courage water intake
Fig. 3 is the flow-pressure differential performance schematic representation of valve.After being contained in valve on the pipe-line system, have a unsettled pressure difference to be applied to the import and the outlet port of valve, this pressure difference is exactly the pressure difference Δ P of valve courage water intake and water outlet.After the user is by the flow and aperture of regulating connecting rod 12 definite valves, the fixed-site of connecting rod 12 is lived, as long as pressure reduction is at Δ P
a～Δ P
bChange in the scope, valve just can satisfy the requirement of user's stability of flow.After aperture was determined well, the lower cylinder body 9 of valve was fixing, transferred stream cylindrical shell 6 to fix with respect to the position of valve courage lower cylinder body 9, and it is constant just transferring the area of passage that flows on the cylindrical shell 6.According to flow formula
As can be known, flow coefficient ξ is a definite value, and flow q demand is a definite value, transfers the area of passage A of stream cylindrical shell 6
1Be definite value, so only need pressure differential deltap P
23Be definite value.
In order to reach pressure differential deltap P
23Be the requirement of definite value, the present invention realizes in the following way.The pressure difference Δ P=Δ P at valve two ends
12+ Δ P
23, Δ P is at Δ P
a～Δ P
bChange in the scope.When Δ P increases, need Δ P
12Increase.When Δ P increases Δ P
23With Δ P
12Can moment follow increase, the balance of pressure-sensitive plate 2 both upper ends thereof can be destroyed, and according to mechanical relationship, pressure-sensitive plate 2 can drive pressure-sensitive plate 2, upwards activity of pressure regulation slide cartridge 10, up to making Δ P under the effect of differential water pressures
23Set up good new balance, i.e. Δ P
23Be stabilized in the design load scope.We notice, in the process that pressure regulation slide cartridge 10 makes progress away along with movable part 2, and the area of passage A of lower cylinder body 9
2Diminishing, according to flow formula
Demand volume q, flow coefficient ξ are constant, area of passage A
2Diminishing, then pressure differential deltap P
12Increase Δ P=Δ P
12+ Δ P
23Set up new equilibrium relation again, reach requirement.Otherwise, when pressure differential deltap P reduces too.
Fig. 1 is the ssembly drawing of valve courage aperture 100%, and when system branch changes or demand volume when diminishing, the aperture by connecting rod 12 regulating valves gets final product.Connecting rod 12 is downward, drives to transfer stream cylindrical shell 6, flow-stopping plate 4 to follow and move down, and the water intake of valve courage is the discharge area A of valve courage lower cylinder body 9 simultaneously
2Reduce, water outlet is promptly transferred the discharge area A of stream cylindrical shell 6
1Also reduce, according to flow formula
Flow coefficient ξ is a definite value, and pressure differential deltap P
23Be definite value, area of passage A
1Less, so also following, flow q reduces, reach the purpose of adjusting.Otherwise, when valve opening less than 100% the time, flow needs to increase, as long as to adjusted connecting rod 12.
Claims (10)
- But 1, a kind of built-in valve courage formula school transfer attitude flow balance valve, it is characterized in that: it comprises valve body (15), valve courage (17), top cover labyrinth (14), sealing gland (13) and connecting rod (12), stretch out valve after wherein connecting rod (12) connection valve courage (17) passes top cover labyrinth (14) and sealing gland (13) successively, be connected aperture with regulating handle or final controlling element with control valve.
- But 2, built-in valve courage formula school transfer attitude flow balance valve according to claim 1, it is characterized in that: described valve courage (17) connects firmly by fastening screw trip bolt (16) and valve body (15).
- But 3, built-in valve courage formula school transfer attitude flow balance valve according to claim 1, it is characterized in that: described top cover labyrinth (14) is installed with valve body (15) screw thread, and sealing gland (13) is installed with top cover labyrinth (14) screw thread.
- But 4, built-in valve courage formula school transfer attitude flow balance valve according to claim 1, it is characterized in that: described valve courage (17) comprises lower cylinder body (9), its inner wall sleeve is debug stream cylindrical shell (6); Pressure-sensitive plate (2) passes lower cylinder body (9) and transfers stream cylindrical shell (6); Also connect firmly positioning shaft (5) in the lower cylinder body (9), go up suit inner spring (7), suit outer spring (8) outside pressure-sensitive plate (2) at positioning shaft axle (5); Transfer stream cylindrical shell (6) top also to connect firmly with valve courage upper end cap (1); Between dividing plate top of transferring stream cylindrical shell (6) and pressure-sensitive plate (2), a flow-stopping plate (4) is arranged.
- But 5, built-in valve courage formula school transfer attitude flow balance valve according to claim 4, it is characterized in that: described positioning shaft (5) and lower cylinder body (9) connect firmly by location lining (11), and positioning shaft (5) has a step to be used for inner spring (7) location.
- 6, but built-in valve courage formula school transfer attitude flow balance valve according to claim 4 is characterized in that: have flowing hole on described lower cylinder body (9) and the accent stream cylindrical shell (6).
- But 7, built-in valve courage formula school transfer attitude flow balance valve according to claim 4, it is characterized in that: described pressure-sensitive plate (2) is installed pressure regulation slide cartridge (10) down, both are up and down under the effect of waterpower, and with the power equilibrium establishment of inner spring (7), outer spring (8) relation.
- But 8, transfer the attitude flow balance valve according to claim 1 or 4 described built-in valve courage formula schools, it is characterized in that: described accent stream cylindrical shell (6), valve courage upper end cap (1), flow-stopping plate (4) move up and down the aperture of adjustment valve by connecting rod (12).
- But 9, built-in valve courage formula school transfer attitude flow balance valve according to claim 4 is characterized in that: have in the described valve courage upper end cap (1) and proofread and correct the fine setting correction that the conical surface is used for flow.
- But 10, built-in valve courage formula school transfer attitude flow balance valve according to claim 4, it is characterized in that: there are some apertures at the intermediate clapboard place of described valve courage upper end cap (1) in order to slow down the impact of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100159582A CN101270829B (en) | 2008-05-06 | 2008-05-06 | Embedded valve container type adjustable dynamic flow equalizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100159582A CN101270829B (en) | 2008-05-06 | 2008-05-06 | Embedded valve container type adjustable dynamic flow equalizing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101270829A true CN101270829A (en) | 2008-09-24 |
| CN101270829B CN101270829B (en) | 2012-06-27 |
Family
ID=40004974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100159582A Expired - Fee Related CN101270829B (en) | 2008-05-06 | 2008-05-06 | Embedded valve container type adjustable dynamic flow equalizing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101270829B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313054A (en) * | 2011-08-19 | 2012-01-11 | 浙江盾安阀门有限公司 | Piston type pressure reducing valve |
| CN102808642A (en) * | 2011-06-01 | 2012-12-05 | 淮南矿业(集团)有限责任公司 | Cooling device |
| CN103429940A (en) * | 2010-12-07 | 2013-12-04 | Ta海卓尼克斯有限责任公司 | Improvement in balancing and control valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1084185A (en) * | 1912-12-23 | 1914-01-13 | Samuel A Whitehouse | Valve structure. |
| US2417158A (en) * | 1945-05-16 | 1947-03-11 | Speakman Co | Mixing valve |
| US2707966A (en) * | 1950-05-25 | 1955-05-10 | John F Taplin | Pressure regulator valve |
| US3348567A (en) * | 1965-01-04 | 1967-10-24 | Alexander S Volpin | Compound pressure sealant-sealed valve |
| US3908693A (en) * | 1973-05-01 | 1975-09-30 | Pall Corp | Coaxial bidirectional flow control and relief valves and hydrostat system containing the same |
| CN2866987Y (en) * | 2004-10-26 | 2007-02-07 | 株洲高新技术产业开发区华清仪器厂 | Dynamic balance valve |
-
2008
- 2008-05-06 CN CN2008100159582A patent/CN101270829B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103429940A (en) * | 2010-12-07 | 2013-12-04 | Ta海卓尼克斯有限责任公司 | Improvement in balancing and control valve |
| US9551433B2 (en) | 2010-12-07 | 2017-01-24 | Ta Hydronics S.A. | Balancing and control valves |
| CN102808642A (en) * | 2011-06-01 | 2012-12-05 | 淮南矿业(集团)有限责任公司 | Cooling device |
| CN102313054A (en) * | 2011-08-19 | 2012-01-11 | 浙江盾安阀门有限公司 | Piston type pressure reducing valve |
| CN102313054B (en) * | 2011-08-19 | 2014-04-16 | 浙江盾安阀门有限公司 | Piston type pressure reducing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101270829B (en) | 2012-06-27 |
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Granted publication date: 20120627 |