CN103322252B - Regulating valve for central air conditioning system - Google Patents
Regulating valve for central air conditioning system Download PDFInfo
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- CN103322252B CN103322252B CN201310192729.9A CN201310192729A CN103322252B CN 103322252 B CN103322252 B CN 103322252B CN 201310192729 A CN201310192729 A CN 201310192729A CN 103322252 B CN103322252 B CN 103322252B
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- valve
- rod
- plug portion
- conditioning system
- central air
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Abstract
The invention discloses a regulating valve for a central air conditioning system. The regulating valve for the central air conditioning system comprises a valve body which is provided with an inlet end and an outlet end, a valve seat which is provided with a circulating channel, a valve core and a valve rod; one end of the valve rod is connected with an executing mechanism; an extension portion, a ladder portion and a valve plug portion are sequentially arranged on the valve core along the direction from the inlet end to the outlet end; the extension portion and the ladder portion are arranged in the valve seat; the valve plug portion is externally arranged on the valve seat; an outer diameter of the valve plug portion is larger than an inner diameter of the valve seat; the other end of the valve rod is arranged inside a valve body portion which is arranged between the valve plug portion and the outlet end; an L-shaped ejection rod is arranged on the valve rod; a long arm end of the ejection rod is fixed on the valve rod; a short arm end of the ejection rod is abut against the external surface of the valve plug portion. The regulating valve for the central air conditioning system has the advantages of being convenient to machine, reducing requirements for machining accuracy and field installation due to the facts that the valve core and the valve rod are separately arranged, power transmits through the ejection rod, and axial overlap ratio of the valve core and the valve seat is high and being good in sealing effect, small in driving torque and low in whole energy consumption.
Description
Technical field
The present invention relates to technical field of central air, especially relate to the modulating valve used in a kind of central air-conditioning system.
Background technique
Central air-conditioning system comprises freezing unit, chilled water circulation loop, cooling water circulation loop and each end-equipment, the cold that freezing unit produces is delivered to end-equipment by chilled water circulation loop, the temperature controller connected by end-equipment compares according to desired temperature and actual temperature value, regulable control is carried out to the valve of chilled water pipeline, thus realizes the control to the output of end-equipment heat exchange amount.In order to ensure the needs of each end-equipment heat exchange amount, the pressure of chilled water circulation pipe network needs to ensure that the end-equipment of chilled water pump outlet distalmost end also can have enough hydraulic pressure, therefore, the outlet pressure of chilled water pump is higher, in addition, because each end-equipment is not need to carry out heat exchange simultaneously, therefore always there is the modulating valve at portion distal end equipment place to need to close, cause the pressure reduction of part modulating valve both sides higher.
The existing common modulating valve for central air-conditioning system comprises stop valve, ball valve and butterfly valve, its structure includes valve body, valve seat, spool, valve rod and actuator, wherein valve seat is arranged in valve body, its inside is provided with circulation passage, spool is positioned at valve seat, and can circulation passage be closed, one end of valve rod is connected on spool, and the other end connects actuator.The signal that actuator exports according to final controlling element, is rotated by motor or pneumatic mode actuate valve stem or is moved, and band movable valve plug rotates or displacement in circulation passage, realizes the effect of control flow check flux.
The circulation passage of stop valve is vertical with the flow direction of cooling medium, the opening and closing of control flow check circulation passage is carried out by the lifting of spool, cooling medium needs to turn to just by valve seat through twice, the pressure loss in runner is larger, in addition actuator needs to be connected with valve rod, spool, the impact that the degree of adaptability of spool and circulation passage can be installed by actuator, therefore higher to the requirement on machining accuracy of each parts, also need accurately to locate respectively spool and actuator when installing at the scene, otherwise be easy to occur mismatch error, easily produce leakage.
The circulation passage of ball valve is identical with the flow direction of cooling medium, the pressure loss in runner is little, its spool is provided with through hole, by regulating the area of overlap of through hole and circulation passage, realize the adjustment to flow, for Leakage prevention, spool needs to be located by valve seat, coordinating between valve seat with spool is comparatively tight, drive the moment of valve core rotation comparatively large, in addition for ensureing the structural strength of spool, the area of through hole is less, through hole just can be made after causing spool needs to turn an angle overlapping with circulation passage, there is hysteresis quality in Flow-rate adjustment.
Butterfly valve circulation passage is identical with the flow direction of cooling medium, and the pressure loss in runner is little, and its spool is the circular butterfly plate be arranged in circulation passage, is changed the area of circulation passage, realize the adjustment of flow by rotational valve core.Because valve core rotation needs to overcome washing away of fluid, driving moment is higher, after valve closing, also needs to keep enough driving forces, otherwise is easy to occur leaking.
Summary of the invention
The object of this invention is to provide a kind of structure simple, install easily and close tighter central air-conditioning system modulating valve.
Technical solution of the present invention is: a kind of central air-conditioning system modulating valve, comprise the valve body being provided with entrance point and outlet end, inside is provided with the valve seat of circulation passage, the valve rod that spool and one end are connected with actuator, along described entrance point to outlet end direction, described spool is provided with extension part in turn, end difference and valve plug portion, wherein extension part and end difference are positioned at described valve seat, valve plug portion is positioned at outside described valve seat, the external diameter of valve plug portion is greater than the internal diameter of described valve seat, in the other end of the described valve rod described valve body between valve plug portion and described outlet end, the other end of described valve rod is provided with the push rod of L-type, the long arm end of push rod is fixed on described valve rod, galianconism end is pressed on the outer surface of valve plug portion.
The valve plug portion of spool is positioned at outside the valve seat of outlet end side, the plane of valve plug portion can be fitted on valve seat end plane, valve seat is sealed, extension part and end difference are positioned at the valve seat of entrance point side, can slide axially in valve seat, gap between end difference outer surface and valve seat port changes the rate-of flow that can adjust and flow through valve seat, media flow direction and valve core movement direction basically identical, runner internal resistance is less, the long arm end of push rod is fixed on valve rod, galianconism end can axially be pressed on the outer surface of valve plug portion, when valve rod rotates, the long-armed portion of push rod can servo-actuatedly rotate, thus change the moment size of galianconism portion axial compression at valve plug portion outer surface, under the promotion of flowing medium, valve plug portion keeps the trend to the movement of outlet end direction, under the extruding in push rod galianconism portion, valve plug portion can move to entrance point, by changing the angle that valve rod rotates, regulate push rod galianconism portion to the extruding moment size of valve plug portion, thus make spool change the axial position in valve seat, realize the adjustment to flow.Because the motion of spool and the motion of valve rod are separated, so spool and valve rod degree of adaptability require to decline, alleviate machining accuracy and field erected requirement, the dead in line degree of spool and valve seat is high, the repeatability of surface of contact improves, and is not easy to produce to leak, and its sealing effect is better, driving force required for throttle down is not high, and overall energy consumption declines.
Described end difference is provided with the first end difference be connected with described valve plug portion and the second end difference be connected with described extension part.Spool face between first end difference and the second end difference can be used for being arranged to different surface curve according to the flow curve of different operating mode.
Described first end difference is provided with seal ring.The sealing effect of further raising spool.
Described extension part is arranged with the guiding rib of at least three axis.Realize the smooth sliding of spool in valve seat by symmetrically arranged axial guiding rib, the volume that extension part itself takies circulation passage can also be reduced simultaneously, reduce flow passage resistance force of waterproof further.
Be provided with recess in the middle part of the outer surface of described valve plug portion, the free end of described push rod is pressed in recess.Recess is arranged on the middle part of valve plug portion, and the axial moment suffered by valve plug portion is more concentrated, is conducive to keeping compressing the equilibrium of valve seat end plane.
The vertical cross-section semicircular in shape of described recess or triangle.Recess is hemisphere or taper shape, makes push rod more easily move to the central position of recess, plays the effect of location.
Advantage of the present invention is: spool and valve rod split are arranged, power is transmitted by push rod, spool high with the dead in line degree of valve seat, processing is easier, and reduce machining accuracy and field erected requirement, its obturation effect is better, driving moment is little, and overall energy consumption is low.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention;
Accompanying drawing 2 is the plan view of spool in the embodiment of the present invention;
Accompanying drawing 3 be in Fig. 2 A-A to sectional view;
Accompanying drawing 4 is contrast experiment's system diagram;
1, valve body, 2, entrance point, 3, outlet end, 4, valve seat, 5, circulation passage, 6, spool, 7, valve plug portion, 8, end difference, 9, extension part, the 10, first end difference, the 11, second end difference, 12, valve rod, 13, push rod, 14, recess, 15, guiding rib, 16, seal ring, 17, inlet valve, 18, inlet gage, 19, testing valve, 20, torsiometer, 21, discharge pressure table, 22, outlet valve.
Embodiment
Embodiment:
Consult Fig. 1-3, a kind of central air-conditioning system modulating valve, can be used on the chilled water water return pipeline of end-equipment, it comprises the valve body 1 being provided with entrance point 2 and outlet end 3, inside is provided with the valve seat 4 of circulation passage 5, the valve rod 12 that spool 6 and one end are connected with actuator (not shown), in the present embodiment, the entrance point 2 of valve body 1 and outlet end 3 are yi word pattern setting, along entrance point 2 to outlet end 3 direction, spool 6 is provided with extension part 9 in turn, end difference 8 and valve plug portion 7, wherein extension part 9 and end difference 8 are positioned at valve seat 4, valve plug portion 7 is positioned at outside valve seat 4, the external diameter of valve plug portion 7 is greater than the internal diameter of valve seat 4, in the other end of valve rod 12 valve body 1 between valve plug portion 7 and outlet end 3, which is provided with the push rod 13 of L-type, the long arm end of push rod 13 is fixed on valve rod 12, galianconism end is pressed on the outer surface of valve plug portion 7.
Be provided with recess 14 in the middle part of the outer surface of valve plug portion 7, the galianconism end of push rod 13 is pressed in recess 14.In the present embodiment, the vertical cross-section semicircular in shape of recess 14, also can be triangular in shape, and such recess 14 itself, in hemisphere or taper, facilitates the galianconism end of push rod 13 to locate the center being pressed on recess 14, ensures the equalising torque compressed valve plug portion 7.End difference 8 is provided with the first end difference 10 be connected with institute valve plug portion 7 and the second end difference 11 be connected with extension part 9, between the first end difference 10 and valve plug portion 7, is provided with seal ring 16, improve the sealing effect to valve seat 4 end plane further.Spool 6 surface between first end difference 10 and the second end difference 11 can be used for arranging different surface curve according to different working condition requirement.
The external diameter of three constituent elements of spool 6 is different, the valve plug portion 7 that wherein external diameter is larger is positioned at outside the valve seat 4 of outlet end 3 side, the plane of valve plug portion 7 can be fitted in valve seat 4 on the end plane of outlet end side, the circulation passage 5 of valve seat 4 is closed, extension part 9 and end difference 8 are positioned at the valve seat 4 of entrance point 2 side, can slide axially in valve seat 4, extension part 9 can ensure that spool 6 can not depart from outside valve seat 4, plays the effect of guiding when sliding simultaneously.End difference 8 outer surface curve can adjust, thus changes the gap between valve seat 4 port, and different surface curve can realize the adjustment of different flow characteristic.When there is pressure reduction between entrance point 2 and outlet end 3, spool 6 keeps the trend of sliding to outlet end 3 direction, compressing due to push rod 13 simultaneously, spool 6 can be limited in the state of airtight valve seat 4 end, by rotation valve rod 12, adjustment push rod 13 free end compresses power to valve plug lid 7, controllable valve core 6 distance in axial sliding in valve seat 4.Due to valve rod 12 with spool 6 for split is arranged, the motion mode of spool 6 is for sliding axially, valve rod 12 can be set to vertical with spool 6, the rotation of valve rod 12 being transmitted by push rod 13 is the end thrust applied spool 6, spool 6 is high with the dead in line degree of valve seat 4, when valve closing, the surface of contact of spool 6 and valve seat 4 can not move, the repeatability of surface of contact is high, be not easy to produce and leak, and can also realize by the setting angle of adjustment push rod 13 on valve rod 12 adjustment spool 6 being compressed to power, thus improve the obturation effect of spool 6 pairs of circulation passages 5.
In the present embodiment, extension part 9 is arranged with the guiding rib 15 of three axis.The volume that extension part 9 itself takies circulation passage 5 can be reduced, reduce flow passage resistance force of waterproof.The quantity of guiding rib 15 can also be four or five, as long as be symmetrical arranged, can ensure the uniform force of spool 6, slide axially more steady.Certainly, the quantity of guiding rib 15 is more, and the resistance in runner is larger, and therefore preferred version is symmetrically arranged three guiding ribs 15.
The beneficial effect of the technology of the present invention is now further illustrated by comparative tests.
One, experimental setup:
With reference to machinery industry JB/T5296-1991 " test method of general inventive flow coefficient and flow resistance coefficient ", chilled water pipeloop is provided with experimental system as shown in Figure 4, inlet valve 17, testing valve 19 and outlet valve 22 is provided with from water intake to water outlet in sequential series, inlet pressure gauge 18 is provided with between inlet valve 18 and testing valve 19, between testing valve 19 and outlet valve 22, be provided with delivery gauge 21, the valve rod of testing valve 19 is provided with torsiometer 20.Wherein inlet pressure gauge 18 and delivery gauge 21 are the precision pressure gauge that instrument and meter for automation Co., Ltd of HuaPu of Jinhu County produces, the DB6N4 type torque spanner that torsiometer 20 selects Tohnichi Mfg Co., Ltd. to produce.
Two, experimental facilities:
1, ball valve: bore DN50mm, model: NRU24-SR, Switzerland is rich tries hard to the manufacture of final controlling element Co., Ltd;
2, butterfly valve: bore DN50mm, model: SRVU24-SR-5, Switzerland is rich tries hard to the manufacture of final controlling element Co., Ltd;
3, embodiment of the present invention valve: bore: DN50mm.
Three, experimental technique: regulate the hydrodynamic pressure and the flow that flow through testing valve 19 by inlet valve 17 and outlet valve 22.In the whole process of testing valve 19 by " opening completely " to " completely close ", measure the moment of torsion acted in valve rod rotating shaft respectively with torsiometer 20, and record Maximum Torque.
Four, experimental result:
Through test, the moment of torsion under the identical bore of various valve and power consumption contrast are as following table:
Usual valve is when closing completely, and required moment of torsion is maximum, as can be seen from the above table, adopt invention of the present invention when closing completely, Maximum Torque much smaller than existing ball valve and butterfly valve, one way power consumption also much smaller than existing ball valve and butterfly valve, therefore, adopt the modulating valve of structure of the present invention, its driving moment is little, and overall power is low, under similar circumstances, airtight tightr, be less likely to occur to leak.
Above-listed detailed description is illustrating for one of the present invention possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (6)
1. a central air-conditioning system modulating valve, comprise the valve body being provided with entrance point and outlet end, inside is provided with the valve seat of circulation passage, the valve rod that spool and one end are connected with actuator, it is characterized in that: along described entrance point to outlet end direction, described spool is provided with extension part in turn, end difference and valve plug portion, wherein extension part and end difference are positioned at described valve seat, valve plug portion is positioned at outside described valve seat, the external diameter of valve plug portion is greater than the internal diameter of described valve seat, in the other end of the described valve rod described valve body between valve plug portion and described outlet end, the other end of described valve rod is provided with the push rod of L-type, the long arm end of push rod is fixed on described valve rod, galianconism end is pressed on the outer surface of valve plug portion.
2. a kind of central air-conditioning system modulating valve according to claim 1, is characterized in that: on described end difference, be provided with the first end difference be connected with described valve plug portion and the second end difference be connected with described extension part.
3. a kind of central air-conditioning system modulating valve according to claim 2, is characterized in that: on described first end difference, be provided with seal ring.
4. a kind of central air-conditioning system modulating valve according to claim 1 or 2 or 3, is characterized in that: the guiding rib being arranged with at least three axis on described extension part.
5. a kind of central air-conditioning system modulating valve according to claim 4, is characterized in that: be provided with recess in the middle part of the outer surface of described valve plug portion, the free end of described push rod is pressed in recess.
6. a kind of central air-conditioning system modulating valve according to claim 5, is characterized in that: the vertical cross-section semicircular in shape of described recess or triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310192729.9A CN103322252B (en) | 2013-01-25 | 2013-05-22 | Regulating valve for central air conditioning system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320044165X | 2013-01-25 | ||
| CN201320044165 | 2013-01-25 | ||
| CN201320044165.X | 2013-01-25 | ||
| CN201310192729.9A CN103322252B (en) | 2013-01-25 | 2013-05-22 | Regulating valve for central air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322252A CN103322252A (en) | 2013-09-25 |
| CN103322252B true CN103322252B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310192729.9A Active CN103322252B (en) | 2013-01-25 | 2013-05-22 | Regulating valve for central air conditioning system |
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| CN (1) | CN103322252B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2396037A (en) * | 1943-06-29 | 1946-03-05 | Air Reduction | Double-acting check valve |
| GB1117488A (en) * | 1965-10-02 | 1968-06-19 | Milwaukee Valve | Improvements in or relating to valve assemblies |
| US3807442A (en) * | 1972-03-08 | 1974-04-30 | Fisher Controls Co | Excess flow check valve with variable closing flow rate |
| CN1251642A (en) * | 1997-04-01 | 2000-04-26 | 桑德斯阀公司 | Safety filtering valve with adjustable closing flow rate setting |
| CN2599355Y (en) * | 2003-01-21 | 2004-01-14 | 谭仲禧 | Electrically operated valve fof fan coiled pipe |
| CN200946677Y (en) * | 2006-09-15 | 2007-09-12 | 四川省科能工业设备制造有限公司 | Millstone type ceramic valve for material conveying |
| CN201462015U (en) * | 2009-06-15 | 2010-05-12 | 周根章 | Wear-resistant ceramic pneumatic side slide valve |
| CN201561136U (en) * | 2009-12-31 | 2010-08-25 | 赵云辉 | Rotary ceramic abrasion resistant feeding valve |
| KR20100010863U (en) * | 2009-04-27 | 2010-11-04 | 황기연 | Valve |
| CN102384279A (en) * | 2011-11-16 | 2012-03-21 | 北京航天动力研究所 | Single-disk valve |
-
2013
- 2013-05-22 CN CN201310192729.9A patent/CN103322252B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2396037A (en) * | 1943-06-29 | 1946-03-05 | Air Reduction | Double-acting check valve |
| GB1117488A (en) * | 1965-10-02 | 1968-06-19 | Milwaukee Valve | Improvements in or relating to valve assemblies |
| US3807442A (en) * | 1972-03-08 | 1974-04-30 | Fisher Controls Co | Excess flow check valve with variable closing flow rate |
| CN1251642A (en) * | 1997-04-01 | 2000-04-26 | 桑德斯阀公司 | Safety filtering valve with adjustable closing flow rate setting |
| CN2599355Y (en) * | 2003-01-21 | 2004-01-14 | 谭仲禧 | Electrically operated valve fof fan coiled pipe |
| CN200946677Y (en) * | 2006-09-15 | 2007-09-12 | 四川省科能工业设备制造有限公司 | Millstone type ceramic valve for material conveying |
| KR20100010863U (en) * | 2009-04-27 | 2010-11-04 | 황기연 | Valve |
| CN201462015U (en) * | 2009-06-15 | 2010-05-12 | 周根章 | Wear-resistant ceramic pneumatic side slide valve |
| CN201561136U (en) * | 2009-12-31 | 2010-08-25 | 赵云辉 | Rotary ceramic abrasion resistant feeding valve |
| CN102384279A (en) * | 2011-11-16 | 2012-03-21 | 北京航天动力研究所 | Single-disk valve |
Non-Patent Citations (1)
| Title |
|---|
| 流量调节阀在满负荷长输管道均衡供气中的作用;肖平;《石油化工应用》;20071225;第26卷(第6期);50-52 * |
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| CN103322252A (en) | 2013-09-25 |
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