CN102261501B - Preset flow-type dynamic balance regulating valve - Google Patents
Preset flow-type dynamic balance regulating valve Download PDFInfo
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- CN102261501B CN102261501B CN 201110117146 CN201110117146A CN102261501B CN 102261501 B CN102261501 B CN 102261501B CN 201110117146 CN201110117146 CN 201110117146 CN 201110117146 A CN201110117146 A CN 201110117146A CN 102261501 B CN102261501 B CN 102261501B
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Abstract
The invention relates to a preset flow-type dynamic balance regulating valve. Unique integrated design is adopted, a rotational flow preset regulating unit, a flow regulating unit of a direct stroke regulating-type structure, a flow balance unit of a membrane-type pressure sensing structure and a valve body are integrated, thus the valve dynamic flow balance function and the flow preset regulating function are integrated into a whole, and the balance regulating valve has the characteristics of compact structure, great circulation capability, high control accuracy, wide working pressure difference range, long service life and low manufacturing cost, and is convenient to assemble and maintain, and the balance regulating valve can be applied to the industries of a central air conditioning water system, an urban pipe network water system, petroleum, chemical industry and the like.
Description
Technical field
The present invention relates to a kind of valve of controlling flow, the preset flow-type dynamic balance regulating valve that more particularly, relate to that a kind of integrated flow rate presets, Flow-rate adjustment and flow equilibrium three functions is integrated.
Background technique
In the different journey pipe network of fluid supply flow-changing water system, the resistance of often only considering index circuit during actual design calculates, when the available pressure head of system's least favorable node was guaranteed, the effect pressure head of other node may much larger than design load, cause the hydraulic misadjustment of system.And the excessive or improper operating flux off-design value that also can cause of the type selecting of water pump, the result of pipe network water force unbalance causes the increase of a large amount of wastes of the energy, running noises and the shortening of service life of equipment.The regulating valve of existing Pipeline for Carrying Fluid end use application does not generally have the function of the fluid flow that flows through valve being carried out the transient equiliblium adjusting, in case the pressure of system fluctuates, the water flow that flows through valve will change thereupon, cause the too high or too low for temperature of heating/refrigeration space, cause the waste of the energy, this variation also can cause the imbalance of each regional water system.In order to alleviate or to eliminate this pipe network energy imbalance, need to constantly debug system, not only trouble expends the plenty of time, the more important thing is that this adjusting lags behind, and consequently there is energy imbalance in the actual system time that uses.Some engineerings are used the problem of using the flow setting type equilibrium valve to solve hydraulic misadjustment, but just are very limited when flow system flow need to be regulated, only have the valve of replacing just can deal with problems, so exploitation adjustable type equilibrium valve is imperative.
Present domestic dynamic balance adjusting valve exists price high, and the product work pressure differential range is little, the shortcoming that flow control accuracy is low, and have serious vibrating noise, can't satisfy the needs of Practical Project.From product structure, these products all are simply flow balance valve and modulating valve to be combined, and the resistance coefficient of valve is very large, and structure is also very large, turn-off required power value and final controlling element electric power all very large, are unfavorable for practical implementation.
In addition, requirement according to energy-saving and emission-reduction, each terminal required flow maximum value needs restriction, that is to say that the flow of valve needs linear presetting, the valve that existing market finds no still that integrated flow presets, Flow-rate adjustment and flow equilibrium three functions are integrated.
Summary of the invention
The technical problem to be solved in the present invention is intended to overcome the deficiency of above-mentioned prior art, provide a kind of integrated flow rate to preset, the preset flow-type dynamic balance regulating valve that Flow-rate adjustment and flow equilibrium three functions are integrated, its resistance coefficient is little, reasonable in design, compact structure, Perfect in shape and function, can preset the ideal value of flow, flow by valve is controlled in the scope that is no more than this ideal value in real time, even the fluctuation of flow in the pipe network system occurs, but can guarantee and keep to be in state of equilibrium by the flow of valve, can not follow the fluctuation of pipe network flow and change, and operating pressure differential wide ranges, control accuracy is high, be mainly used on building heating ventilation air-conditioning system and industry or the civilian fluid pipe network transmission ﹠ distribution end system, with flow through equipment and user's fluid flow of control, regulate in real time, reach the pipe network dynamic flow balancing, the purpose of energy saving.
Preset flow-type dynamic balance regulating valve of the present invention is to be 201010623619.X(201020700188.8 at the application number that the applicant submitted on December 30th, 2010), name is called the further technological innovation on the basis of invention (model utility) application of " dynamic balance adjusting valve ", basis in Flow-rate adjustment and flow equilibrium function has increased the function that presets flow, and the application's technological scheme is:
Preset flow-type dynamic balance regulating valve comprises being fixedly connected with valve upper cover, upper valve body and the lower valve body that becomes one from top to bottom, it is characterized in that:
Described modulating valve also comprises all and valve upper cover concentric flow preconditioning unit, flow regulating unit and flow equilibrium unit vertical with lower valve body from top to bottom;
Described flow preconditioning unit and flow regulating unit are arranged in the upper valve body inner chamber that is surrounded by valve upper cover and upper valve body, described flow preconditioning unit and flow regulating unit are near the fluid outlet of described valve body, it is inner that described flow regulating unit is included in described flow preconditioning unit, and link into an integrated entity with described flow preconditioning unit; Described flow equilibrium unit is positioned under the described flow regulating unit, and is arranged in the inner chamber of lower valve body;
Described flow regulating unit comprises poppet shaft, ring-spring, catch and the blocking-up sheet that passes vertically downward loam cake plug and valve upper cover and enter the upper valve body inner chamber from top to bottom; Loam cake plug and poppet shaft are tightly connected; The top of described poppet shaft is exposed at outside the loam cake plug, is connected (not shown) with valve driver; Sheathed ring-spring on the outer wall at the middle part of poppet shaft; Again to downward-extension, form screw head behind the inside recessed contraction formation poppet shaft step of the outer wall of the bottom of poppet shaft, be formed with screw thread on the outer wall of screw head, screw head inserts in the blocking-up sheet after passing the catch center; Catch is pressed between described blocking-up sheet upper-end surface and the poppet shaft step;
The top of described blocking-up sheet is the cylindrical body that is hollow, and its underpart is the basin-like body that cross-section area reduces gradually, and the maximum diameter of basin-like body is formed with inside step less than the diameter of cylindrical body between basin-like body and cylindrical jointing place; The central vertical of described blocking-up sheet formation opening recessed down, opening runs through cylindrical body and extends in the basin-like body; The vertical inwall of the opening of described blocking-up sheet is provided with screw thread;
The screw head of described poppet shaft is passed down through the center of described catch and further inserts in the opening at center of described blocking-up sheet, screw thread on the vertical inwall of the screw thread that forms on the outer wall of screw head and the opening at the center of described blocking-up sheet matches, poppet shaft and blocking-up sheet are connected as a single entity, poppet shaft moves up and down under the driving of valve driving machine structure, drives up and down straight line motion of flow regulating unit;
Described flow preconditioning unit comprises regulating spool and regulates cover near the fluid outlet of described valve body;
Described regulating spool is arranged in described upper valve body inner chamber, and the top on the top of regulating spool and loam cake plug are tightly connected; The spool wall of the lower end on the top of the regulating spool formation platform that stretches out, described platform is pressed on the described valve upper cover, and the middle part of described regulating spool is close to the inwall on the top of described valve upper cover, and is tightly connected with described valve upper cover; The body cavity indentation that makes progress of the bottom of described regulating spool, its inwall and poppet shaft are tightly connected; The center of the cavity that the middle part of described poppet shaft surrounds between by described loam cake plug and regulating spool, the described ring-spring that is coated on the outer wall at middle part of described poppet shaft namely is positioned at described cavity;
Described adjusting cover is close to the inwall setting of the bottom of described valve upper cover, is connected with regulating spool by retaining ring, and further by valve core nut described flow preconditioning unit is fixedly connected with described valve upper cover and becomes one;
Described adjusting cover has annular wall vertically downward, the curvilinerar figure fluting that has common fluid to pass through on the described wall, described regulating spool drives described adjusting cover and can freely rotate in the upper valve body inner chamber, change the annular wall of regulating cover and block the area of fluid output, thereby change the flow of fluid that can be by regulating the fluting on the cover, namely described modulating valve presets flow; The shape design of the curvilinerar figure of described adjusting cover fluting makes blocks definite described of the area of fluid output because of annular wall and presets the linear variation of flow;
Corresponding adjusting scale is arranged on the platform of described regulating spool, as the scale of regulating, the fluting that indication can be by regulating cover preset flow;
Described flow equilibrium unit comprises diaphragm lid, membrane module and the lower blocking-up sheet of centres from top to bottom; Membrane module comprises diaphragm, central tube and film spring; The 2nd O type circle is embedded in the inside recessed groove on the inwall of lower valve body, guarantees the sealing between central tube and the lower valve body; The barrel on the top of described central tube stretches out and forms the platform shape, support diaphragm lid, described diaphragm lid and diaphragm central opening, diaphragm next-door neighbour diaphragm lid below arranges, the outer periphery of diaphragm lid are fixedly connected with lower valve body, and between the outer periphery that the outer periphery of diaphragm are pressed on the diaphragm lid and the lower valve body, and between diaphragm lid and described shape body the center-side of compression diaphragm, thereby diaphragm is pressed in the cavity of the sealing that is surrounded by diaphragm lid, central tube and lower valve body; Described film spring is arranged in the cavity that is surrounded by diaphragm lid, central tube and lower valve body, is set on the central tube outer wall; Described lower blocking-up sheet is fixedly connected with lower valve body.
The present invention adopts the described flow preconditioning unit of the preconditioning structure of rotation, flow regulating unit and the upper valve body of employing straight journey adjustment type structure to form a whole.
Further, technological scheme of the present invention is:
Described upper valve body is provided with the pressure guide hole of the fluid output that is communicated with flow equilibrium unit and upper valve body, and an end of described pressure guide hole is communicated with described fluid output, and the other end is communicated with the cavity that lower valve body surrounds by diaphragm lid, central tube with described.
Described diaphragm is elastomer diaphragm; Described central tube is copper.
Form the circulation road that goes out that to regulate area of passage between the diaphragm lid of the flow equilibrium unit of the blocking-up sheet of described flow regulating unit and its below; Form the circulation road that enters that to regulate area of passage between diaphragm unit and the lower blocking-up sheet.
Flow regulating unit moves up and down under the drive of poppet shaft, and the basin-like body that changes the blocking-up sheet enters the degree of depth of the inner chamber of flow equilibrium unit, thereby changes the area that the fluid that circulation road can pass through; Thereby the shape of basin-like body is designed to make because of the area generation linear change that its difference that enters the degree of depth in the inner chamber causes out Gong the fluid of circulation road to pass through the shape that is changed to linear change of flow.
Described poppet shaft moves downward under the effect of valve driver, drives the downward moving linearly of blocking-up sheet, reduces the flow by modulating valve, and the realization valve opening diminishes or closes; Be to reduce or when removing the downward thrust of valve driver, rely on the reaction force of the ring-spring ejection poppet shaft that makes progress, the aperture that increases between blocking-up sheet and the diaphragm lid is opened to realize valve.
Be fixedly connected with upper valve body again after flatly rotating to an angle after described lower valve body separates with respect to upper valve body, thereby change fluid input with respect to the direction of valve body.
On the described upper valve body with respect to being equipped with pressure measurement mouth/pressure measurement plug installation position on the wall with respect to another side valve body of fluid input on the wall of the opposite side valve body of fluid output and on the lower valve body, so that described upper valve body is connected with pressure measurement mouth or pressure measurement plug with lower valve body.
Be fixedly connected with cross recessed countersunk head sscrew between described lower blocking-up sheet and the lower valve body, thereby make the flow equilibrium unit be fixed on valve inner.
Described loam cake plug is tightly connected by o type circle with the poppet shaft of passing it; The outer wall to the plug wall of downward-extension of the inwall at the top of described regulating spool and loam cake plug is tightly connected by o type circle; The inwall on the outer wall of the regulating spool of the platform below of described regulating spool and the top of valve upper cover is tightly connected by o type circle.
The present invention adopts unique integrated design, dexterously that flow preset functions, the real-time regulatory function of flow and dynamic flow Real-time Balancing Functional Design is into a single integrated structure, compact structure, cost is low, in use, at first preset flow in certain ideal value by rotating regulation valve core regulating valve, guarantee can not surpass this ideal value by the maximum capable of regulating flow quantity of modulating valve, avoid unnecessary waste, and the design of the fluting of the annular wall of adjusting cover makes this preset the linearly adjust that is adjusted to of flow; The drive flow regulating unit that moves up and down of poppet shaft moves up and down in the upper valve body inner chamber, thereby changes the flow by modulating valve, and this flow by modulating valve is adjustable in the scope of the ideal value that presets that is no more than this modulating valve; And then, when a certain position of moving to of poppet shaft and the definite flow that passes through modulating valve one regularly, and the pressure of working as pipe network system changes, under the effect of flow equilibrium unit, the fluctuation of guaranteeing the pressure of this net system can not change the flow by valve, by optimal design and the further Optimization Balancing function of experimental analysis and service behaviour, resistance coefficient is very little, have wider operating pressure differential scope and more accurate control accuracy, flow accuracy nominal value ± 5% in, the regulatory function multimode, can change multi-form blocking-up sheet, realize the various ways such as equal percentage adjusting and linearly adjust, lower valve body can be according to the demand of actual pipe network situation, and after rotating a certain angle, the processing respective screw hole is installed, this valve body variable becomes the dynamic balance adjusting valve of angle valve type, does not preset and do not affect its flow, transient equiliblium and adjusting two functions; And the preconditioning traffic engineering capability of valve is in order to satisfy the requirement of energy-saving and emission-reduction, the required flow maximum value of each current network end-point is limited, namely the flow of valve needs linear presetting, can before the valve installation valve driver according to regulating spool on corresponding scale rotating regulation valve core, regulating spool drives regulates the cover rotation, thereby change the aperture at valve export E place, to realize the preconditioning of valve flow.Two screw holes are arranged on the platform on the top of regulating spool, interior hexagonal lock screw can be housed, behind the preconditioning valve flow, be locked, namely by interior hexagonal lock screw with regulating spool be crushed on valve upper cover fixing and locking under it.
The regulating spool of preconditioning unit with regulate between the cover be by retaining ring be connected and make four with valve core nut between be fixedly connected with and become one, the rotation of regulating spool drives regulates the cover motion, regulate the area that cover blocks fluid output thereby change, fluid is just to flow to fluid output from going out circulation road by the fluting of regulating on the cover.
And in case regulating spool and valve upper cover are locked with socket head screw, then being equivalent to stipulate can be by regulating the maximum value of the flow that covers, and this maximum value is the value of the scale indication on the platform of regulating spool namely.The locking of interior hexagonal lock screw is the mistuning joint of having stipulated that in order to prevent maximum value is later.
In addition, each assembly of preconditioning unit is fixedly connected with and becomes one, carry out being locked after the preconditioning, the vertical up-or-down movement of the poppet shaft of the flow regulating unit that is driven by final controlling element again, can drive the blocking-up sheet moves up or down, the volume of inner chamber that the bottom of blocking-up sheet enters the center of flow equilibrium unit changes, thereby change from the discharge area that Gong the fluid that goes out circulation road passes through, but, the vertical up-or-down movement of poppet shaft can not drive the action of flow preconditioning unit, do not affect the flow preconditioning unit that has been locked, that is to say, from action, flow preconditioning unit only is when mounted valve or in case of necessity, can be set in desirable position by the maximum value of valve in advance, after the locking, just in the transient equiliblium of reality is regulated, carry out again any action without flow preconditioning unit.Remain by flow regulating unit and flow equilibrium unit and jointly finish the adjusting of flow and transient equiliblium function.To do like this and to be the peak rate of flow that just determines this branch road in order installing in system first in the heating system, also too late with regard to crossing because large flow does not have actual use again, also can cause the waste of resource.Being energy-conservation needs, also is the privately adjusting that prevents the user, and the maximum opening of setting.
Described poppet shaft of the present invention also is not limited to the connection electric actuator, also can link to each other with multiple driving mechanisms such as electrical actuator, handwheels, even can connect the valve driver of wearing the anti-theft nut, to prevent lack of competence personnel's adjusting, therefore adaptability is stronger, be mainly used on building heating ventilation air-conditioning system and industry or the civilian fluid pipe network variable flow system, with flow through equipment and user's water flow of control, reach the pipe network flow equilibrium, regulate in real time, the purpose of energy saving.
Description of drawings
Fig. 1 is the surface structure schematic diagram of preset flow-type dynamic balance regulating valve of the present invention.
Fig. 2 is the sectional structure schematic diagram of preset flow-type dynamic balance regulating valve of the present invention.
Fig. 3 is the cutaway view Amplified image of blocking-up sheet of the present invention.
Fig. 4 is the cutaway view Amplified image of membrane module of the present invention.
Fig. 5 is the structural representation of valve shaft of the present invention.
Fig. 6 is the main TV structure schematic diagram of regulating spool of the present invention.
Fig. 7 is the plan view of regulating spool of the present invention.
Fig. 8 is the main TV structure schematic diagram of adjusting cover of the present invention.
Fig. 9 is the plan structure schematic diagram of adjusting cover of the present invention.
Description of reference numerals
1. descend valve body 2. socket head screws 3. spring washers 4. upper valve bodies 5. pressure measurement plug/pressure measurement mouth
6. valve upper cover 7. loam cake plugs 8. poppet shaft 9. are regulated cover 10. valve core nuts 11. retaining rings
12. regulating spool 13. pads 14. split washers 15. Sealing shield rings 16. O type circles 17. O type circles
18. O type circle 19. springs 20. O type circles 21. catch 22. O type circles 23. blocking-up sheets
24. O type circle 25. diaphragms cover 26. film springs, 27. O type circles 28. the 2nd O type circle, 29. membrane modules
30. lower blocking-up sheet 31. cross recessed countersunk head sscrews 32. pressure guide holes 33. poppet shaft steps
34. screw head outside thread 35. diaphragms 36. central tubes 37. basin-like bodies 38. regulating spool scales
39. screw hole 40. openings 41. steps 42, platform 43, annular wall 44, fluting 45, support platform 46, pressure measurement mouth/pressure measurement plug installation position 47, pressure measurement mouth/pressure measurement plug installation position 48, plug wall 49, small stair 50, recessed mouth
A. the fluid input B. channel C that becomes a mandarin. inner chamber D. goes out circulation road E. fluid output F. diaphragm lower chamber
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Preset flow-type dynamic balance regulating valve of the present invention shown in Fig. 1-9 comprises valve upper cover 6, upper valve body 4 and the lower valve body 1 that the center is coaxial, be sealedly and fixedly connected and become one from top to bottom, and modulating valve also comprises all and valve upper cover 6 and valve lower body 1 vertical concentric flow preconditioning unit, flow regulating unit and flow equilibrium unit from top to bottom.
Flow preconditioning unit and flow regulating unit are arranged in the upper valve body inner chamber that is surrounded by valve upper cover 6 and upper valve body 4, flow preconditioning unit and flow regulating unit are near the fluid output E place of the upper valve body of modulating valve, and from the space, it is inner that flow regulating unit is comprised in flow preconditioning unit, be positioned in the more close modulating valve on the D place as shown in Figure 2, and link into an integrated entity with flow preconditioning unit; The flow equilibrium unit is positioned under the flow regulating unit, and is arranged in the inner chamber of lower valve body.
Specifically, shown in Fig. 2-5, flow regulating unit comprises poppet shaft 8, spring 19, catch 21 and the blocking-up sheet 23 that passes vertically downward loam cake plug 7 and valve upper cover 6 and enter the upper valve body inner chamber from top to bottom.
The top of poppet shaft 8 is exposed at outside the loam cake plug 7, is connected (not shown) with valve driver.
Below the middle part of poppet shaft 8, be arranged in the upper valve body inner chamber, and sheathed ring-spring 19 on the outer wall at the middle part of poppet shaft 8; The inside recessed contraction of the outer wall of the bottom of poppet shaft 8 forms behind the poppet shaft step 33 again to downward-extension, form screw head 34, be formed with screw thread on the outer wall of screw head 34, screw head 34 inserts in the opening recessed down at the center of blocking sheet 23 after passing catch 21 centers; Catch 21 is pressed between the upper-end surface and poppet shaft step 33 of blocking-up sheet 23.
The top of blocking-up sheet 23 is the cylindrical shape that is hollow, and its underpart is the basin-like body 37 that cross-section area reduces gradually, and the maximum diameter of basin-like body is formed with the step 41 of inside indentation less than the diameter of cylindrical body between basin-like body and cylindrical jointing place.
The central vertical formation opening 40 recessed down of blocking-up sheet 23, opening 40 extends to and terminates in the basin-like body 37 after running through cylindrical body, and do not have the break-through basin-like body.The vertical inwall of the opening 40 at blocking-up sheet center is provided with screw thread, it is passed down through the center of catch with the bottom of poppet shaft and the screw thread that further inserts on the outer wall of screw head of opening at center of blocking-up sheet matches, poppet shaft and blocking-up sheet are connected as a single entity, move up and down under the driving of poppet shaft driving mechanism externally, drive flow regulating unit and move up and down.
Flow preconditioning unit is near the fluid outlet of upper valve body, and flow preconditioning unit comprises regulating spool 12 and regulates cover 9.
Such as Fig. 2, Fig. 6 and regulating spool 12 shown in Figure 7 are arranged in the upper valve body inner chamber, the top on the top of regulating spool 12 and loam cake plug are tightly connected, the spool wall of the lower end on the top of regulating spool 12 stretches out and forms platform 42, platform 42 is pressed on the valve upper cover 6, the inwall on the top of middle part next-door neighbour's valve upper cover 6 of regulating spool 12, and be tightly connected with valve upper cover, the body cavity indentation that makes progress of the bottom of regulating spool 12, end at the top of catch 21, and have on its inwall concave into groove, this groove is embedded with o type circle 20, regulating spool 12 is stuck in catch more than 21 with poppet shaft 8, and the outer wall of the part of close catch 21 is tightly connected by o type circle 20, and the fluid that enters in the upper valve body inner chamber can not entered by loam cake plug 7, in the chamber that regulating spool 12 and poppet shaft 8 surround.Even 20 wearing and tearing of o type circle also have the o type circle 16 and 17 at loam cake plug 7 places to form second protection.
The center of the cavity that the middle part of poppet shaft 8 namely surrounds between by loam cake plug 7 and regulating spool 12, the ring-spring 19 that is coated on the outer wall at middle part of poppet shaft 8 also is positioned at this cavity.
Regulate the inwall setting of the bottom of cover 9 next-door neighbour's valve upper covers 6, be connected with regulating spool 12 by retaining ring 11, and further by valve core nut 10 flow preconditioning unit is fixedly connected with valve upper cover and becomes one.
Regulate cover 9 annular wall 43 that have vertically downward, curvilinerar figure fluting 44 is arranged on the wall, fluid is just to flow to the E district from the D district by the fluting of regulating on the cover.Regulating spool 12 drives adjusting cover 9 and can freely rotate in the upper valve body inner chamber, changes the area that the annular wall 43 of regulating cover 9 is blocked fluid output
,Can be through going out circulation road D and the fluid output that arrives is discharged the flow of the fluid of modulating valve then by regulating the fluting on the cover 9 thereby change, be the flow that presets of modulating valve, the shape design of regulating the curvilinerar figure fluting 44 of cover make because of blocking of annular wall change the area of fluid output definite preset the linear variation of flow.
Corresponding adjusting scale 38 is arranged on the platform 42 of regulating spool 12, as the scale of regulating, the fluting that indication can be by regulating cover preset flow.At valve upper cover corresponding indicating arrow is arranged, rotating regulation valve core as required, the scale that arrow is corresponding is the flow that presets of modulating valve.This presets flow 0 linear adjustable continuously in the maximum opening scope of valve, the situation the when fluting that the maximum opening here refers to regulate cover does not block fluid output fully.
Rotate regulating spool 8, can drive and regulate cover 9 rotations, thereby change the aperture at valve export E place.Two screw holes 39 are arranged on the platform 42 of regulating spool 12, interior hexagonal lock screw can be housed, when regulating spool 12 forwards a certain location positioning to and presets flow, pass screw hole 39 with interior hexagonal lock screw, fix with it and with respect to the valve upper cover locking, thereby with the locking of flow preconditioning unit, flow preconditioning unit finally is fixed together by valve upper cover and upper valve body.
And in case regulating spool and valve upper cover are locked with socket head screw, then being equivalent to stipulate can be by regulating the maximum value of the flow that covers, and this maximum value is the value of the scale indication on the platform of regulating spool namely.The locking of interior hexagonal lock screw is the mistuning joint of having stipulated that in order to prevent maximum value is later.
In addition, each assembly of preconditioning unit is fixedly connected with and becomes one, carry out being locked after the preconditioning, the vertical up-or-down movement of the poppet shaft of the flow regulating unit that is driven by final controlling element again, can drive the blocking-up sheet moves up or down, the volume that the bottom of blocking-up sheet enters the C district changes, thereby change the discharge area that enters the D district from the C district, namely change the flow by the fluid of modulating valve, but, the vertical up-or-down movement of poppet shaft can not drive the action of preconditioning unit, do not affect the preconditioning unit that has been locked, that is to say, from action, the preconditioning unit only is when mounted valve or in case of necessity, can be set in by the maximum value of valve desirable position in advance, after the locking, just in the transient equiliblium of reality is regulated, carry out again any action without the preconditioning unit, remain adjusting and the transient equiliblium function of jointly being finished flow by flow regulating unit and flow equilibrium unit.Doing like this is the peak rate of flow that just determines this branch road in order to install in system first in the heating system, because large flow does not have actual use again, also too late with regard to crossing, also can cause the waste of resource, be energy-conservation needs, also be the privately adjusting that prevents the user, and adopt the preconditioning unit, set the peak rate of flow of valve.
The flow equilibrium unit adopts diaphragm type pressure-sensitive structure, comprises diaphragm lid 35, membrane module 29 and the lower blocking-up sheet 30 of centres from top to bottom, and membrane module 29 comprises diaphragm 35, central tube 36 and film spring 26.
The 2nd O type circle 28 is embedded in the inside recessed groove on the inwall of lower valve body 1, guarantees the sealing between central tube 36 and the lower valve body 1..
Diaphragm lid 25 outwards extends gradually, diaphragm 35 next-door neighbour's diaphragms cover 25 belows and arrange, diaphragm lid 25 and diaphragm 35 central openings, the outer periphery of diaphragm lid 25 are fixedly connected with lower valve body 1, and the outer periphery of diaphragm 35 are pressed between the outer periphery and lower valve body of diaphragm lid, the barrel on the top of central tube 36 stretches out and forms support platform 45, being pressed between the part of close central opening of support platform 45 and diaphragm lid by paracentral part of diaphragm 35, thus diaphragm 35 is pressed in the cavity of the sealing that is surrounded by diaphragm lid, central tube and lower valve body.
Film spring 26 is arranged in the cavity that is surrounded by diaphragm 35, central tube 36 and lower valve body 1, and is set on the outer wall of central tube 36.
Lower blocking-up sheet is positioned at the below of membrane module 29, and it is fixedly connected with lower valve body 1.
Flow regulating unit moves up and down under the drive of poppet shaft, and the basin-like body 37 that changes the blocking-up sheet enters the degree of depth of the inner chamber of flow equilibrium unit, thereby changes the area that the fluid that circulation road D can pass through.Thereby the shape of basin-like body is designed to make because of the area generation linear change that its difference that enters the degree of depth in the inner chamber causes out Gong the fluid of circulation road D to pass through the shape that is changed to linear change of flow.
In this example, be fixedly connected with cross recessed countersunk head sscrew 31 between lower blocking-up sheet 30 and the lower valve body 1, thereby make the flow equilibrium unit be fixed on valve inner.
In this example, upper valve body 4 is provided with the pressure guide hole 32 of the fluid output E that is communicated with flow equilibrium unit and upper valve body.One end of pressure guide hole 32 is communicated with fluid output, the other end be communicated with the cavity F that lower valve body 1 surrounds by diaphragm lid 25, central tube 36.This cavity F is positioned at the space of membrane module below, also can be referred to as diaphragm lower chamber F, and it is the enclosed space that only has pressure guide hole 32 these unique outlets, and so just the pressure with fluid output E place is passed to diaphragm lower chamber F place.
In this example, diaphragm 35 is elastomer diaphragm, and central tube is copper.
In the time of need to reducing the flow by modulating valve, poppet shaft 8 is downward moving linearly under the valve driver (not shown) promotes, refer to that generally valve driver stretches out a push rod, push rod contacts and promotes the downward moving linearly of poppet shaft with the poppet shaft upper surface, so driving blocking-up sheet 23 moves downward, the basin-like body of blocking-up sheet enters downwards in the central opening of diaphragm lid, reduces area that fluid passes through and realizes that valve closes gradually.That blocks sheet moves downward Compress Spring 19.As shown in Figure 5, the poppet shaft at the middle part of close poppet shaft is inwardly shunk and is formed small stair 49, the poppet shaft outer wall of its top inwardly further shrinks and forms recessed mouthful 50, crimping split washer 13 on this small stair, and the bottom of the plug wall of loam cake plug contacts with the end face of this split washer 13.Card is established pad 14 in recessed mouthful, like this with spring 19 owing to the restoring force that makes progress of the spring 19 that forms by compression in other words reaction force transmit by split washer 13, pad 14, to push up on the poppet shaft, poppet shaft 8 is under the effect of valve driver, can press to any required separation distance in the stroke range, and owing to the reaction force of spring keeps the fixed position, then the flow of the fluid by modulating valve namely reaches the value that needs, the i.e. desired value of valve driver.
When needing to increase the flow that passes through modulating valve, poppet shaft 8 is upwards regained at the push rod of valve driver, poppet shaft 8 moving linearly upwards under the effect of the reaction force that makes progress of spring 19, driving blocking-up sheet 23 moves upward, the basin-like body of blocking-up sheet upwards away from the central opening of diaphragm lid, increases the area that fluid passes through, the realization valve opening increases, the flow value that passes through modulating valve that obtains wishing.Valve driver pushes away under the poppet shaft only, and what poppet shaft was up moved dependence is the restoring force of spring.
In this example, lower valve body 1 is fixedly connected with upper valve body after flatly rotating to an angle after separating with respect to upper valve body again, thereby changes fluid input with respect to the direction of valve body.In actual applications, be threaded to be fixed into upper valve body 4 after angle of lower valve body 1 rotation and be integrated, this angle is slightly different according to different bore valve bodies, correspondingly, processing need to be adjusted in upper and lower valve body screw thread position, so original valve is converted to rotary motion valve by linear motion valve, thereby variable body becomes the dynamic balance adjusting valve of angle valve type, and do not affect its transient equiliblium and regulate two functions, adaptability is stronger.Angle of swing is being required under the undemanding actual conditions, can directly rotate lower valve and connect.Like this, in actual use, can particularly in the place of narrow space the dynamic balance adjusting valve that is transformed to the angle stroke be installed according to the spatial extent utilized of valve present position, realize equally transient equiliblium and regulatory function, have good Practical significance.
The present invention can select whether to install the pressure measurement mouth according to demand.In this example, also be provided with pressure measurement mouth/pressure measurement plug installation position 46 on the wall with respect to the opposite side valve body of fluid output on the upper valve body 4, so that upper valve body is connected with pressure measurement mouth/pressure measurement plug.In this example, also be provided with simultaneously pressure measurement mouth/pressure measurement plug installation position 47 on the wall with respect to another side valve body of fluid input on the lower valve body 1, so that lower valve body is connected with pressure measurement mouth/pressure measurement plug.The general paired use of pressure measurement mouth.Then load onto the pressure measurement plug when need not pressure measurement and needing.Said structure makes the structure of modulating valve of the present invention more perfect.
In this example, loam cake plug 7 is connected by o type circle sealing 16 with the poppet shaft 8 of passing it.
In this example, the outer wall to the plug wall 48 of downward-extension of the inwall at the top of regulating spool 12 and loam cake plug is tightly connected by o type circle 17.
In this example, the outer wall of the regulating spool of the platform of regulating spool 12 below is tightly connected by twice o type circle 18 with the inwall on the top of valve upper cover 6, and O type circle 18 is embedded in the groove on the outer wall of regulating spool, with the sealing between assurance regulating spool and the valve upper cover.
In this example, the outer wall of valve upper cover 6 and upper valve body 4 keep sealing by the O type circle 22 in the groove that is embedded in valve upper cover 6 outer walls.
In this example, upper valve body 4 and lower valve body 1 keep sealing by the O type circle 27 in the groove that is embedded in upper valve body 4 outer walls.
As shown in Figure 2, form between the diaphragm lid of the flow equilibrium unit of the blocking-up sheet of flow regulating unit of the present invention and its below can regulate area of passage go out circulation road D; Form the channel B that becomes a mandarin that to regulate area of passage between diaphragm unit and the lower blocking-up sheet.The sequence of flow of fluid of the present invention is A-B-C-D-E.
In this example, O type circle 28 is embedded in the inside recessed groove on the inwall of lower valve body, compression diaphragm 35 between central tube 36 support platform 45 by its top and the diaphragm lid 25, thereby guarantee that sealing between central tube 36 and the lower valve body 1 is without leakage, enter when avoiding fluid to enter inner chamber C by fluid input A via the channel B that becomes a mandarin in the cavity that the inwall by diaphragm lid 25, central tube 36 and lower valve body 1 surrounds, fluid is by behind the inner chamber C, via going out circulation road D to fluid output.
Preset flow-type dynamic balance regulating valve of the present invention adopts flow preconditioning unit with above-mentioned rotatable preconditioning structure, adopt flow regulating unit and the upper valve body 1 of the adjustment type structure that above-mentioned straight journey moves up and down in other words to form a whole compact structure.
The present invention adopts unique integrated design, dexterously that flow preset functions, the real-time regulatory function of flow and dynamic flow Real-time Balancing Functional Design is into a single integrated structure, have compact structure, negotiability is large, control accuracy is high, the operating pressure differential scope is wide, assembling is easy to maintenance, the life-span long, the characteristics of low cost of manufacture, can be applicable to the industries such as central air conditioning water system, urban pipe network water system, oil, chemical industry.
In use, at first preset flow in certain ideal value by rotating regulation valve core regulating valve, guarantee can not surpass this ideal value by the maximum capable of regulating flow quantity of modulating valve, avoid unnecessary waste, and the design of the fluting of the annular wall of adjusting cover makes this preset the linearly adjust that is adjusted to of flow; The drive flow regulating unit that moves up and down of poppet shaft moves up and down in the upper valve body inner chamber, thereby changes the flow by modulating valve, and this flow by modulating valve is adjustable in the scope internal linear of the ideal value that presets that is no more than this modulating valve; And then, when poppet shaft moves to a certain position and the definite flow that passes through modulating valve one timing, and the pressure of working as pipe network system changes, under the effect of flow equilibrium unit, the fluctuation of guaranteeing the pressure of this net system can not change the flow by valve, by optimal design and the further Optimization Balancing function of experimental analysis and service behaviour, resistance coefficient is very little, have wider operating pressure differential scope and more accurate control accuracy, flow accuracy nominal value ± 5% in, the regulatory function multimode, can change multi-form blocking-up sheet, realize the various ways such as equal percentage adjusting and linearly adjust, lower valve body can be according to the demand of actual pipe network situation, and after rotating a certain angle, the processing respective screw hole is installed, this valve body variable becomes the dynamic balance adjusting valve of angle valve type, does not preset and do not affect its flow, transient equiliblium and adjusting two functions; And the preconditioning traffic engineering capability of valve is in order to satisfy the requirement of energy-saving and emission-reduction, the required flow maximum value of each current network end-point is limited, namely the flow of valve needs linear presetting, can before the valve installation valve driver according to regulating spool on corresponding scale rotating regulation valve core, regulating spool drives regulates the cover rotation, thereby change the aperture at valve export E place, to realize the preconditioning of valve flow.
Described poppet shaft of the present invention also is not limited to the connection electric actuator, also can link to each other with multiple driving mechanisms such as electrical actuator, handwheels, even can connect the valve driver of wearing the anti-theft nut, to prevent lack of competence personnel's adjusting, therefore adaptability is stronger, be mainly used on building heating ventilation air-conditioning system and industry or the civilian fluid pipe network variable flow system, with flow through equipment and user's water flow of control, reach the pipe network flow equilibrium, regulate in real time, the purpose of energy saving.
The working principle of preset flow-type dynamic balance regulating valve of the present invention is as follows:
When valve was not worked, valve driver was without driving signal or 0, and valve driver promotes blocking-up sheet 23 downward straight line motions by poppet shaft 8, the runner between fully closed blocking-up sheet 23 and the diaphragm lid 25, and valve is in normally off.
During valve working, export control signal to valve driver by fluid hose network control system or controller, valve driver is opened according to the size of control signal, poppet shaft certain height that moves upward, driving the blocking-up sheet moves upward, after basin-like body promoted, fluid was by valve body, and pipe network system obtains required flow.
When flow system flow need to be regulated, the control system output signal made valve driver open greatly, open little or close, and drove the blocking-up sheet and moved up or down, realized flow regulating function.The effect of spring is to reduce or when removing the downward thrust of valve driver, the poppet shaft recovery that can automatically make progress.The aperture that the restitution of dependence spring 19 can increase between blocking-up sheet 23 and the diaphragm lid 25 is opened to realize valve.
During throttle down, poppet shaft is under valve driver promotes, the drive flow regulating unit moves down, blocking-up sheet 23 downward moving linearlies, along with moving down of the basin-like body of blocking sheet 23, the bottom of basin-like body enters the central opening of diaphragm lid 25, aperture between blocking-up sheet 23 and the diaphragm lid 25 reduces, the area that goes out circulation road D between basin-like body and the diaphragm lid 25 reduces gradually, until the opening periphery on the diaphragm lid 25 joins with the cylindrical lower end surface of blocking sheet 23, realizes that valve closes.
And the preconditioning traffic engineering capability of valve is in order to satisfy the requirement of energy-saving and emission-reduction, the required flow maximum value of each current network end-point is limited, namely the flow of valve needs linear presetting, can before the valve installation valve driver according to regulating spool 12 on corresponding scale 38 rotating regulation valve cores, regulating spool 12 drives regulates cover 9 rotations, thereby change the aperture at valve export E place, to realize the preconditioning of valve flow.
In the working procedure, the variation of different journey pipe network variable flow system pressure is constantly to exist, the present invention is by the effect of flow equilibrium unit, when system pressure raises, by being communicated with of the pressure-taking hole 32 on the upper valve body 4 and fluid output E, fluid can enter from the E chamber F chamber, the pressure at fluid output E place is passed to diaphragm lower chamber F, low pressure with valve outlet port is passed to the F chamber exactly, the preferred stainless steel of film spring is made, and the upper pressure of diaphragm raises, with the pressure difference Δ P increase of diaphragm lower chamber F, therefore break original state of equilibrium, diaphragm 35 drives central tube 36 and moves downward, and the distance between central tube 36 and the lower blocking-up sheet 30 reduces, so the area of water outlet reduces, the negotiability-flow coefficient kv value that is valve reduces, according to flow formula
, flow can remain unchanged.The flow here is constant, experiment and the calculating through repeatedly, the optimum state that selected suitable pretightening force and the spring of elasticity coefficient and the channel size of valve body etc. are realized, inappropriate spring or channel size meeting are so that when the pressure reduction variation at valve body two ends, flow can not remain unchanged, and deviation is arranged, but the pressure reduction variation that the pressure measurement mouth of foregoing paired usefulness then is join dependency equipment measures the valve two ends, need not to measure when requiring, then use the pressure measurement plug that it is blocked and seal.Because be relatively high pressure on the diaphragm, the relatively low pressure in this high pressure and the F chamber and spring force keep balance, realize new state of equilibrium.Vice versa, thereby reached the purpose of flow automatic balance, makes constant flow in the scope of demarcating, and eliminated the impact of system pressure fluctuation on flow.
Above-mentionedly only the specific embodiment among the present invention is illustrated; but be not that protection scope of the present invention is done any pro forma restriction; every equivalence of making according to the design spirit among the present invention changes or modifies, and all should think to fall into protection scope of the present invention.
Claims (10)
1. preset flow-type dynamic balance regulating valve comprises being fixedly connected with valve upper cover, upper valve body and the lower valve body that becomes one from top to bottom, it is characterized in that:
Described modulating valve also comprises all and valve upper cover concentric flow preconditioning unit, flow regulating unit and flow equilibrium unit vertical with lower valve body from top to bottom;
Described flow preconditioning unit and flow regulating unit are arranged in the upper valve body inner chamber that is surrounded by valve upper cover and upper valve body, described flow preconditioning unit and flow regulating unit are near the fluid outlet of described upper valve body, it is inner that described flow regulating unit is included in described flow preconditioning unit, and link into an integrated entity with described flow preconditioning unit; Described flow equilibrium unit is positioned under the described flow regulating unit, and is arranged in the inner chamber of lower valve body;
Described flow regulating unit comprises poppet shaft, ring-spring, catch and the blocking-up sheet that passes vertically downward loam cake plug and valve upper cover and enter the upper valve body inner chamber from top to bottom; Loam cake plug and poppet shaft are tightly connected; The top of described poppet shaft is exposed at outside the loam cake plug, is connected with valve driver; Sheathed ring-spring on the outer wall at the middle part of poppet shaft; Again to downward-extension, form screw head behind the inside recessed contraction formation poppet shaft step of the outer wall of the bottom of poppet shaft, be formed with screw thread on the outer wall of screw head, screw head inserts in the blocking-up sheet after passing the catch center; Catch is pressed between described blocking-up sheet upper-end surface and the poppet shaft step;
The top of described blocking-up sheet is the cylindrical body that is hollow, and its underpart is the basin-like body that cross-section area reduces gradually, and the maximum diameter of basin-like body is formed with inside step less than the diameter of cylindrical body between the jointing place of basin-like body and cylindrical body; The central vertical of described blocking-up sheet formation opening recessed down, opening runs through cylindrical body and extends in the basin-like body; The vertical inwall of the opening of described blocking-up sheet is provided with screw thread;
The screw head of described poppet shaft is passed down through the center of described catch and further inserts in the opening at center of described blocking-up sheet, screw thread on the vertical inwall of the screw thread that forms on the outer wall of screw head and the opening at the center of described blocking-up sheet matches, poppet shaft and blocking-up sheet are connected as a single entity, poppet shaft moves up and down under the driving of valve driver, drives up and down straight line motion of flow regulating unit;
Described flow preconditioning unit comprises regulating spool and regulates cover near the fluid outlet of described upper valve body;
Described regulating spool is arranged in described upper valve body inner chamber, and the top on the top of regulating spool and loam cake plug are tightly connected; The spool wall of the lower end on the top of the regulating spool formation platform that stretches out, described platform is pressed on the described valve upper cover, and the middle part of described regulating spool is close to the inwall on the top of described valve upper cover, and is tightly connected with described valve upper cover; The body cavity indentation that makes progress of the bottom of described regulating spool, its inwall and poppet shaft are tightly connected; The center of the cavity that the middle part of described poppet shaft surrounds between by described loam cake plug and regulating spool, the described ring-spring that is coated on the outer wall at middle part of described poppet shaft namely is positioned at described cavity;
Described adjusting cover is close to the inwall setting of the bottom of described valve upper cover, is connected with regulating spool by retaining ring, and further by valve core nut described flow preconditioning unit is fixedly connected with described valve upper cover and becomes one;
Described adjusting cover has annular wall vertically downward, the curvilinerar figure fluting that passes through for fluid is arranged on the described wall, described regulating spool drives described adjusting cover and can freely rotate in the upper valve body inner chamber, change the annular wall of regulating cover and block the area of fluid output, thereby change the flow of fluid that can be by regulating the fluting on the cover, namely described modulating valve presets flow; The shape design of the curvilinerar figure of described adjusting cover fluting makes blocks definite described of the area of fluid output because of annular wall and presets the linear variation of flow;
Corresponding adjusting scale is arranged on the platform of described regulating spool, as the scale of regulating, the fluting that indication can be by regulating cover preset flow;
Described flow equilibrium unit comprises diaphragm lid, membrane module and the lower blocking-up sheet of centres from top to bottom; Membrane module comprises diaphragm, central tube and film spring; O type circle is embedded in the inside recessed groove on the inwall of lower valve body, guarantees the sealing between central tube and the lower valve body; The barrel on the top of described central tube stretches out and forms platform shape body, support diaphragm lid, described diaphragm lid and diaphragm central opening, diaphragm next-door neighbour diaphragm lid below arranges, the outer periphery of diaphragm lid are fixedly connected with lower valve body, and between the outer periphery that the outer periphery of diaphragm are pressed on the diaphragm lid and the lower valve body, and between diaphragm lid and described shape body the center-side of compression diaphragm, thereby diaphragm is pressed in the cavity of the sealing that is surrounded by diaphragm lid, central tube and lower valve body; Described film spring is arranged in the cavity that is surrounded by diaphragm lid, central tube and lower valve body, is set on the central tube outer wall; Described lower blocking-up sheet is fixedly connected with lower valve body.
2. preset flow-type dynamic balance regulating valve according to claim 1 is characterized in that:
Described upper valve body is provided with the pressure guide hole of the fluid output that is communicated with flow equilibrium unit and upper valve body, and an end of described pressure guide hole is communicated with described fluid output, and the other end is communicated with the cavity that lower valve body surrounds by diaphragm lid, central tube with described.
3. preset flow-type dynamic balance regulating valve according to claim 2, it is characterized in that: described diaphragm is elastomer diaphragm; Described central tube is copper.
4. preset flow-type dynamic balance regulating valve according to claim 3 is characterized in that: form the circulation road that goes out that can regulate area of passage between the diaphragm lid of the flow equilibrium unit of the blocking-up sheet of described flow regulating unit and its below; Form the circulation road that enters that to regulate area of passage between membrane module and the lower blocking-up sheet.
5. preset flow-type dynamic balance regulating valve according to claim 4, it is characterized in that: flow regulating unit moves up and down under the drive of poppet shaft, the basin-like body that changes the blocking-up sheet enters the degree of depth of the inner chamber of flow equilibrium unit, thereby changes the area that the fluid that circulation road can pass through; Thereby the shape of basin-like body is designed to make because of the area generation linear change that its difference that enters the degree of depth in the inner chamber causes out Gong the fluid of circulation road to pass through the shape that is changed to linear change of flow.
6. preset flow-type dynamic balance regulating valve according to claim 5 is characterized in that:
Described poppet shaft moves downward under the effect of valve driver, drives the downward moving linearly of blocking-up sheet, reduces the flow by modulating valve, and the realization valve opening diminishes or closes; When reducing or remove the downward thrust of valve driver, rely on the reaction force of the ring-spring ejection poppet shaft that makes progress, the aperture that increases between blocking-up sheet and the diaphragm lid is opened to realize valve.
7. preset flow-type dynamic balance regulating valve according to claim 2, it is characterized in that: be fixedly connected with upper valve body again after flatly rotating to an angle after described lower valve body separates with respect to upper valve body, thereby change fluid input with respect to the direction of valve body.
8. preset flow-type dynamic balance regulating valve according to claim 2, it is characterized in that: on the described upper valve body with respect to being equipped with pressure measurement mouth/pressure measurement plug installation position on the wall with respect to the opposite side valve body of fluid input on the wall of the opposite side valve body of fluid output and on the lower valve body, so that described upper valve body is connected with pressure measurement mouth or pressure measurement plug with lower valve body.
9. preset flow-type dynamic balance regulating valve according to claim 2 is characterized in that: be fixedly connected with cross recessed countersunk head sscrew between described lower blocking-up sheet and the lower valve body, thereby make the flow equilibrium unit be fixed on valve inner.
10. preset flow-type dynamic balance regulating valve according to claim 2 is characterized in that:
Described loam cake plug is tightly connected by o type circle with the poppet shaft of passing it; The outer wall to the plug wall of downward-extension of the inwall at the top of described regulating spool and loam cake plug is tightly connected by o type circle; The inwall on the outer wall of the regulating spool of the platform below of described regulating spool and the top of valve upper cover is tightly connected by o type circle.
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| CN 201110117146 CN102261501B (en) | 2011-05-09 | 2011-05-09 | Preset flow-type dynamic balance regulating valve |
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| CN 201110117146 CN102261501B (en) | 2011-05-09 | 2011-05-09 | Preset flow-type dynamic balance regulating valve |
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| CN103090106A (en) * | 2013-01-28 | 2013-05-08 | 王云峰 | Valve core of nickel flotation machine regulating valve |
| WO2021134743A1 (en) * | 2020-01-02 | 2021-07-08 | 西门子瑞士有限公司 | Control valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201115A (en) * | 2006-12-02 | 2008-06-18 | 丹福斯有限公司 | Heating valve, specially insertion valve |
| CN201539611U (en) * | 2009-10-20 | 2010-08-04 | 张亚东 | Visual adjusting automatic water replenishing valve |
| CN102032376A (en) * | 2010-12-30 | 2011-04-27 | 欧文托普阀门系统(北京)有限公司 | Dynamic balance regulating valve |
| CN202012651U (en) * | 2011-05-09 | 2011-10-19 | 欧文托普阀门系统(北京)有限公司 | Preset flow type dynamic balance regulating valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102007050454B4 (en) * | 2007-10-19 | 2013-08-22 | Danfoss A/S | regulating |
| DK177066B1 (en) * | 2008-05-05 | 2011-05-23 | Frese As | Control valve |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201115A (en) * | 2006-12-02 | 2008-06-18 | 丹福斯有限公司 | Heating valve, specially insertion valve |
| CN201539611U (en) * | 2009-10-20 | 2010-08-04 | 张亚东 | Visual adjusting automatic water replenishing valve |
| CN102032376A (en) * | 2010-12-30 | 2011-04-27 | 欧文托普阀门系统(北京)有限公司 | Dynamic balance regulating valve |
| CN202012651U (en) * | 2011-05-09 | 2011-10-19 | 欧文托普阀门系统(北京)有限公司 | Preset flow type dynamic balance regulating valve |
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