CN1223350A - Insert for flow throttling ball valves - Google Patents
Insert for flow throttling ball valves Download PDFInfo
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- CN1223350A CN1223350A CN 99100143 CN99100143A CN1223350A CN 1223350 A CN1223350 A CN 1223350A CN 99100143 CN99100143 CN 99100143 CN 99100143 A CN99100143 A CN 99100143A CN 1223350 A CN1223350 A CN 1223350A
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Abstract
A volume control insert for a ball valve that is attachable in a fluid passage of the ball valve to provide a predetermined flow condition therethrough. The insert has a convex shape, and has a connector disposed on its periphery to attach the insert across the fluid passage. The insert has an elongate slot through it, adapted to provide the predetermined flow condition. A plurality of such inserts may be furnished with a ball valve to provide a range of predetermined flow conditions. Preferably, each of the inserts include a parabolic opening therethrough.
Description
The present invention relates generally to a kind of ball valve that is used for pipeline fluid flow capacity control, more particularly, is a kind of plug that is used for ball valve and a cover plug that alternative flow conditions is provided in HVAC and air-conditioning system.
No matter be manually, hydraulic ball valve, still electric ball valve, they all comprise be fixed in the valve body two seal between embedded ball.One driver rotates the ball in the valve body by the seal bar of stretching out from ball between standard-sized sheet and full close position.
To the typical ball valve shown in Fig. 1 D,, has the penetration hole of unified diameter on the ball as Figure 1A corresponding to the same passage that passes each end of valve body.When ball valve was in fully open position, the hole axially aligned, resistance minimum when fluid flows through passage thus.When progressively turning the handle (or other driver) that connects seal bar, the exposed zone of ball and the sealing that matches thereof can be similar to little " nail " shape or a moon shape, and the degree that moves along with handle sharply broadens, shown in Figure 1B and Fig. 1 C." exposure " zone that the formed intersecting area of two circumferential channels produces unforeseen and convection cell extreme sensitivity, thereby the very difficult flow that obtains wanting with ball valve.
For example, ball valve is through being commonly used for balance circulation heating (HVAC and air-conditioning or " HVAC ") closed-circuit system.The Venturi meter of dress and/or the mouth that tests the speed were so that the accurate flow that flows through ball valve of measuring in ball valve had usually.But the normal structure of ball valve is owing to its receptance that handle is moved is unfavorable for accurate setting.Therefore, might carry out that several steps are whole just to reach desired flow in each side of last driver.
In order to reduce sensitive question, some ball valves offer the hole of relative reduced size to slow down the low discharge adjustment.Although these ball valves have volume controlled performance preferably, in the system that when ball valve is opened fully, need be the high flow capacity state, can produce bad height wearing and tearing.
Selectively, in the passage of ball valve interchangeable aperture can be housed so that improve throttling and control.For example, Japanese Toyo company has issued the ball valve of the ball with diamond-shaped through hole.In addition, the U. S. Patent that Lester etc. have discloses a kind of ball valve with plastics ball of the most cylindrical hole that passes ball for the 5th, 593, No. 135.And an end in hole is used as the throttling wall partial closure of the part of ball.This throttling wall has oblong openings, and when ball was rotated in valve body, this opening can provide more linear flox condition.
Yet these ball valves need cast inblock or mach ball to be used to obtain desirable various flox condition or " Cv value ".In addition, diamond-shaped or other special opening may not be provided for the linear of specific use or other desirable volume flow control.And, when using the conventional material manufacturing such as copper or stainless steel and processing these special-purpose ball valves, to make more difficultly, cost is higher.
Therefore, be necessary to provide a kind of ball valve that can carry out volume flow control than conventional ball valve more accurately.
In addition, also need a kind of providing to have flox condition that plurality of optional selects, and easy to manufacture, do not need the ball valve of special-purpose mould-forming method.
The present invention relates to a kind of ball valve and a kind ofly be used for the plug of ball valve so that provide accurate, substantial linear, and/or to the control of the equal percentage flow characteristic of the capacity of the fluid by ball valve.The present invention also relates to the plug that multiple predetermined flox condition is provided that an a kind of volume controlled plug and a cover are used for ball valve.
An aspect of of the present present invention provides a kind of plug device, and it is attached at and is used to provide the predetermined flox condition by ball valve on the valve member of ball valve.Plug device has and the corresponding basic shape of convex surface that is of the outer surface of valve member.A connector is placed in around the plug so that plug is connected across on the passage by valve member.Plug device has the slit of elongation, as rectangular or parabola shaped opening, can provide predetermined flox condition by valve member passage by this slit.
Universal flow control apparatus is provided in another aspect of this invention, comprises a ball valve and a series of a plurality of volume controlled plugs that pass through the predetermined flox condition of ball valve can be provided.Ball valve has valve casing, has the adverse current and the following current passage that put in valve seat and therefrom pass in valve casing, defines a longitudinal axis that passes valve casing thus.
One has rotating being installed in the valve seat of valve member in the hole of passing its whole body, thus hole and axis alignment.When valve member during in the conversion of standard-sized sheet and full close position, hole and adverse current and following current passage define an adjustable rectification body passage by valve casing together.
A plurality of plugs are crossover passage respectively, and each plug has an elongated opening, is used to provide the predetermined flox condition by the fluid passage.Valve member and each plug comprise that one is used for plug by pack into the connector of valve member of hole, as leg and depression.
The ball valve that third aspect present invention provides can be realized being the FLOW CONTROL of linear volume substantially.Ball valve comprises valve casing, and valve casing has longitudinally the passage that axle passes its whole body.One valve member with hole of passing its whole body is placed in the valve casing, hole and channel alignment.Valve member can rotate around lateral shaft between the Kai Heguan position, and like this, when valve member rotated between its open and close position respectively, hole and passage defined the fluid passage that can adjust between peak rate of flow state and minimum discharge state.
Ball valve comprises that one passes the volume controlled part with parabola opening of fluid passage elongation substantially.The parabola opening has parabolic shape so that be provided at the flow characteristic of basic equal extent between maximum flow state and the minimum flow state mobile between the Kai Heguan position by valve member when valve member rotates.Preferably the volume controlled part is a kind of volume controlled plug that is installed in as mentioned above in the described passage.
Therefore, main purpose of the present invention provides a kind of volume controlled plug and a cover optionally is installed in this kind plug on the ball valve so that predetermined flox condition by ball valve is provided.
Another object of the present invention is to produce a kind ofly ball valve accurate and/or linear predetermined flox condition substantially to be provided and not to need special machining or casting.
The other objects and features of the invention below can be clearer in the description taken together with the accompanying drawings.
Figure 1A is a kind of end sectional view of ball valve of routine to Fig. 1 D, has shown the ball that moves between standard-sized sheet and full close position among the figure;
Fig. 2 A is the cross-sectional view of a ball valve of the present invention;
Fig. 2 B is the front view of a volume controlled plug of the present invention;
Fig. 2 C is another embodiment's of the ball valve among Fig. 2 A a partial sectional view;
Fig. 3 A is the end sectional view of the ball valve among Fig. 2 A to Fig. 3 D, has shown the valve member that moves between standard-sized sheet and full close position;
Fig. 4 is the end elevation with ball valve of the parabola opening by the ball valve fluid passage of the present invention;
Fig. 5 A is the end sectional view of the ball valve among Fig. 4 to Fig. 5 D;
Fig. 6 is an another embodiment's of a ball valve of the present invention cross-sectional view;
Fig. 7 is the table that the flow characteristic of the flow characteristic of ball valve of a routine and ball valve opening of the present invention is compared.
Fig. 2 A has shown a ball valve 10 of the present invention.Ball valve 10 generally includes valve casing 12, valve seat 14, valve member 16, and volume controlled plug 18.The valve casing 12 of available conventional material manufacturing has cavity 20, one passages 22 that are used to hold valve seat 14 and valve member 16 and axially puts in the cavity 20 and from wherein stretching out along the longitudinal axis 23.Passage 22 defines a pipeline, and in the time of in ball valve 10 is contained in such as the fluid delivery system of hydronic HVAC system (not shown) etc., the fluid such as air-conditioning gas can flow by this pipeline.
Valve member 16 is generally ball 24, and cylindrical hole 26 axially passes ball 24.Cylindrical hole 26 has the diameter of cardinal principle corresponding to the diameter of the passage 22 that passes valve casing 12 usually.Will illustrate that as following ball 24 comprises that also depression 28 among the hole 26 is with fixed capacity control plug 18.A plurality of depressions 28 are preferably opened in the precalculated position around the hole 26 of closing on an end and are sentenced dismountable fixed capacity control plug 18 on predetermined direction, certainly, also offer the circular groove (not shown) on the valve member 16 and replace depression.
Valve member 16 is made by the durability ball valve material that can in use stand flow condition and fluid collision of routine usually.The most handy metal such as copper or stainless steel of valve member is made, so that compare and have accurate tolerance with the operation such as casting.Yet valve member 16 also can be made such as cylinder or flat cone shape structure, and/or the method for using the same domain person skilled in the art to be familiar with is made.
In addition, valve member 16 comprises a valve rod 30, and the bar hole 32 that valve rod 30 passes in the valve casing 12 is stretched from valve member.Valve rod 30 preferably is installed on the ball 28 along the transverse axis 34 of cardinal principle perpendicular to the longitudinal axis 23.One handle 36, or electric power, hydraulic pressure and other mechanization driver (not shown) are installed on the valve rod 30 to rotate the valve member 16 in valve seat 14 and the cavity 20.
Interchangeable is that volume controlled plug 18 can have other shapes, as becoming the shape (not shown) of rectangle substantially.In the present embodiment, volume controlled plug 18 should be little to can inserting in the passage 22, and its periphery should be installed in the shape in the hole 26 of valve member 16 positions substantially with volume controlled plug 18.Yet for ease of making, plate-like volume controlled plug 18 preferably can use the processing methods of general routine as valve member 16, and needn't be with special design and processing method manufacturing.
In addition, corresponding to the similar pocket shapes (not shown) on the valve member 16, one or more legs 48 can have unique shape, and are big as the size than other legs.This leg shape can guarantee opening 46 alignment of volume controlled plug 18 in hole 26.
Removable, connector that other match and/or annex or correcting mechanism can be placed in volume controlled plug 18 and valve member 16 around, as the viscose that matches, tackiness agent etc.For example, shown in Fig. 2 B and Fig. 2 C, discoid pieces 40 can comprise calibration handle 52 so that it is held in the corresponding slit 54 in the valve member 16 into.
At last, discoid pieces 40 comprises the elongate slit or the opening of an axial elongation.In first most preferred embodiment, opening 46 is rectangular (seeing Fig. 3 A-3D), and in second embodiment, opening 46 is parabola shaped (seeing Fig. 5 A-5D).When volume controlled plug 18 normal mounting were on valve member 16, opening 46 was preferably along the planar extension of cardinal principle perpendicular to transverse axis 34.Opening 46 preferably has predetermined width, height and shape of cross section are so that provide previously selected flox condition, and the minimum discharge when promptly peak rate of flow when valve member 16 is in fully open position and valve member 16 are in full close position provides accurate volume controlled between (typical zero point).
The conventional material that volume controlled plug 18 can adopt the operation of various routines to make, as plastics or metal, the also operation of available various routines.The most handy injection moulded plastics is because they can provide high tolerance plug and make the efficient height.This plastics also can guarantee the deformation behavior of leg 48, help the installation of volume controlled plug.
Leg 48 best existing stiffness are flexible again can be compressed when being pressed into passage 22 and hole 26 with convenient volume controlled plug 18 and elasticity sticks in the depression 28 with fixed capacity control plug 18.Leg 48 also fully deflection help from depression 28, taking out leg 48 with the instrument (not shown), volume controlled plug 18 can be disassembled and not damage any element of ball valve 10 from valve member 16 thus.
In order to install and use ball valve 10 of the present invention, can not have the ball valve that has assembled 10 of volume controlled plug 18 with the manufacturing procedure processing of routine.Except the connector such as depression 28 and/or 54 (Fig. 2 C) can be contained in the China and foreign countries, hole 26 of valve member 16, the broadly similar that the outward appearance of ball valve 10 and manufacture method are best and conventional.Removable, to improved application, the ball valve 410 of the routine shown in Figure 1A-1D is Belt connector not, and connector can be formed on the valve member 416, for example machining depression (not shown) within it.
One cover volume controlled plug can be installed, the volume controlled plug 18 as shown in Fig. 2 A.Each volume controlled plug 18 has same diameter or the cross section corresponding to the hole 26 of valve member 16.Yet corresponding to the highest flox condition, each volume controlled plug 18 has different opening 46, as has the rectangular or parabola opening of different in width and height.Therefore, this cover volume controlled plug can provide a plurality of flox conditions, and promptly the user can select the flow of a prespecified range between standard-sized sheet and full close position.
Be used for providing the volume controlled plug of a predetermined flox condition to select a volume controlled plug 18 from that cover to the given behaviour in service of ball valve 10.When valve member 16 was in fully open position, volume controlled plug 18 was imported in the passage 22.Opening 46 can be calibrated along the plane perpendicular to transverse axis 34, for example, by a calibrating device, as the orientation of the leg (not shown) that amplifies that has, the depression (not shown) of the amplification of a correspondence is arranged simultaneously on volume controlled plug 18 on valve member 16.When in volume controlled plug 18 inlet passages 22 and/or the hole 26, as mentioned above, can compress into leg 48 gently and extend to depression 28 up to the volume controlled plug.So leg 48 and depression 28 engagement or interlocks are passed hole 26 volume controlled plug 18 are fixed on the valve member 16.
When handle 35 and valve member 16 were rotated, rectangular opening 146 progressively withdrawed from (seeing Fig. 3 B and 3C) and reaches full close position (seeing Fig. 3 D) up to valve member 16 from passage 22, closed fully and sealed at this upper channel 22, so that did not have fluid to flow through ball valve 10.Therefore, valve member 16 can to shown in Fig. 3 C, provide selectable flow velocity as Fig. 3 B thus in any location positioning shown in Fig. 3 A and Fig. 3 D.
A key character of ball valve 10 is to rotate along with each degree of valve member 16, the linear segment distance that moves of the arc that rectangular opening 146 limits along the periphery 38 by valve member 16.Therefore, when valve member 16 was closed, the cross section of flow channel 22 shrank in the mode of generally linear.
On the contrary, to shown in the 1D, when valve member 416 rotated, the flow channel 422 of conventional ball valve 410 experienced a unexpected and violent throttling as Figure 1A.This receptance may worsen the stability that ball valve 410 is set in a flow of wishing, because when valve member 416 rotates, may therefore cause ball valve 416 to be difficult to realize desirable setting location fast through realizing the exact position of desirable flow.
To 5D, second most preferred embodiment of volume controlled plug 118 has a parabola opening 246 referring to Fig. 4 and Fig. 5 A.Except the volume controlled plug 118 with a parabola opening 246, other elements of ball valve 10 are with described above identical.The height h of parabola opening 246 changes and is parabola shaped along its width w, does not resemble to have constant substantially height the oblong openings 146.Similar with top oblong openings 146, parabola opening 246 has improved volume controlled on the basis of conventional ball valve, and a kind of equal percentage flow characteristic that uses in the automatic temperature-adjusting control system that is preferably in especially is provided.
As shown in Figure 7, parabola opening 246 and oblong openings 146 have been improved volume flow control on the ball valve of routine.Curve 60,62 and 64 respectively expression when the bar position of ball valve between minimum value (0) and maximum value (1) during changes of function, promptly when valve rotates between full cut-off (0) and standard-sized sheet (1) position, conventional ball valve opening, the flow of oblong openings and parabola opening.
As mentioned above, the arcuate movement that limits along periphery 38 of opening 46 by valve member 16.Because fluid is by passage 22 axial flow, this arc can effectively be given prominence on the cross section of the passage 22 that passes through ball valve 10.Therefore, when valve member 16 forwarded a specific angle to, passage 22 can not blocked to live by real linear mode.
Although above-mentioned oblong openings 146 is controlled near linear capacity, but parabola opening 246 more accurate arc or nonlinear paths that compensated 118 operations of volume controlled plug are because parabola opening 246 provides a mode passage 22 with the cardinal principle equal percentage flow characteristic when the outstanding cross section of passage 22 forwards a specific angle to convenient valve member 116.Therefore, the height h of parabola opening 246 can determine based on the diameter of valve member 16 and the flox condition range computation of hope.
For example, shown in Fig. 5 A and Fig. 5 B, when valve member 16 began from its fully open position rotation, more perpendicular to the axle of passage 22, therefore, passage 22 can very fast throttling in the motion of parabola opening 246.In Fig. 5 B and 5C, passage 22 throttlings are slower, and this is because the arcuate movement of opening 146 more is tangential to the longitudinal axis 23 (not shown in Fig. 5 A-5D) of passage 22.Therefore, the valve member of Chang Gui ball valve may have to twist just can the pass comparable minimizing speed of fluid flow of its passage of bigger angle.When valve member is turned, thereby the transverse cross-sectional area of the exposure by reducing parabola opening 246 has compensated above-mentioned defective, realizes the changes in flow rate of generally linear thus along with each rotation angle.
Referring to Fig. 6, the ball valve 310 in an alternative embodiment of the invention comprises valve casing 312, one valve seats, 314, one valve members 316 and a volume controlled plug 318.Valve casing 312 is usually with previously described identical, has a passage 322 that puts in and pass middle cavity 320.Valve member 316 is preferably the conventional ball 324 with an axially extended cylindrical hole.Valve member 316 rotates around the transverse axis 334 in the valve casing 312 by the driver of a valve rod 330 and such as handle.
Do not resemble aforesaid embodiment, on valve seat 314 rather than the valve member 316 volume controlled plug 318 is housed.Usually, valve seat 314 comprises that one is installed in the permanent part 350 in the cavity 320 so that sealably valve member 316 is fixed in the cavity 320.Volume controlled plug 318 can be installed on the valve seat 314 and/or make the part of valve seat 314.Volume controlled plug 318 comprises an opening 46, oblong openings 146 as described above or parabola shaped opening 246, and have the internal surface that is spill substantially 342 corresponding to the outer surface 338 of valve member 316.
As shown in Figure 6, volume controlled plug 318 can be taked the form of an appendage of valve seat 314.Valve casing 312 can comprise that the one or more depression (not shown) around the passage 22 are used to be contained in leg or other connector (not shown) of the one or more correspondences on the volume controlled plug 318.When volume controlled plug 318 was installed on the valve casing 312, its internal surface 342 preferably and outer surface 338 sealed engagement of valve member 318 helped to support valve member 316 like this and reaches a fluid tightening seal is provided between passage 322 and hole 326.
Interchangeable, the volume controlled plug can be attached to valve seat self (not shown).For example, valve seat and volume controlled plug are except comprising that the connector that matches such as leg and depression is used for being fixed on valve seat rather than the valve member to the volume controlled plug, all with shown identical of Fig. 2 A.
Therefore, a key character of the present invention is that a cover volume controlled plug can offer a single ball valve.This cover plug can provide a series of flox conditions, allow the user to select a plug so that the predetermined flox condition under the special behaviour in service to be provided, plug is easily installed on the ball valve, and work as plug with the old times or along with the change of the flox condition of using can be pulled down old plug and be loaded onto new plug, do not need to change whole ball valve.
Therefore, the summation of each ball valve be can replace, multiple choices and convenience provided to the user according to of the present invention one single ball valve.And, can use conventional method manufacturing corresponding to ball valve of the present invention.Need not process or molded a plurality of special-purpose valve member or each ball valve one provide a series of flow status.
At last, plug of the present invention generally includes an opening, as rectangular or parabola shaped opening, so that improved and/or linear substantially volume flow control to be provided, does not resemble conventional ball valve.Therefore, when a ball valve of the present invention was contained in the fluid system, ball valve is easier to be set on the desirable flow rate.
Described concrete example of the present invention above in conjunction with the accompanying drawings, but the present invention can have various modifications and variations, be not limited to disclosed form and method, these are revised, and modification all falls among the category of appended claim with being equal to substitute.
Claims (27)
1, be used to provide the plug device of predetermined flox condition by ball valve on a kind of valve member that is installed in ball valve, it is characterized in that described plug device comprises:
One plug spare has basically and the corresponding convex shape of the outer surface of its accompanying valve member;
A connector is placed in around the described plug spare, and described connector is pacified described plug spare cross-over connection
Be contained on the passage by valve member;
One elongate slit is by described plug spare, and described elongate slit can provide the predetermined flox condition by the valve member passage that described plug spare is housed.
2, plug device as claimed in claim 1 is characterized in that, described connector comprises a plurality of legs that stretch out from the described periphery of described plug spare, and the depression in the valve member of described leg and correspondence is meshed.
3, plug device as claimed in claim 1 is characterized in that, described connector comprises that a calibrating device is used for providing the predetermined direction of a described elongated open when described plug spare cross-over connection is installed on the passage of valve member.
4, plug device as claimed in claim 1 is characterized in that, described plug spare comprises that one has the disk of cardinal principle corresponding to the diameter of the passage of scurrying valve member.
5, plug device as claimed in claim 4 is characterized in that, the described convex shape of described disk is corresponding to the part of a spheroid, and described spheroid has the outer peripheral surface that is similar to the valve member outer surface substantially.
6, plug device as claimed in claim 1 is characterized in that, described plug spare can be made of plastics.
7, plug device as claimed in claim 1 is characterized in that, described elongate slit can be an oblong openings.
8. plug device as claimed in claim 1 is characterized in that, described elongated slot can be a parabola shaped opening.
9, a kind of ball valves that a plurality of predetermined flox conditions by wherein are provided is characterized in that described ball valve comprises:
One valve casing has adverse current and following current passage by its extension, described adverse current and following current passage put in the described valve casing valve seat and from wherein passing, formed the longitudinal axis by described valve seat thus;
A rotating valve member that is installed in the described valve seat, described valve member has the hole by its extension, and described hole and described adverse current and following current passage define a fluid passage by described valve casing together; And
A plurality of plugs cross-over connection respectively are installed in the described fluid passage, and each in described a plurality of plugs has an opening so that the predetermined flox condition by described fluid passage to be provided.
10. ball valve as claimed in claim 9 is characterized in that, described valve member and described a plurality of plug comprise that one that a connector is used for described a plurality of plugs is installed in the described valve member that passes described hole.
11, ball valve as claimed in claim 10 is characterized in that, described connector comprises leg and the depression that matches, and described leg and depression are formed in described valve member and the described a plurality of plug.
12. ball valve as claimed in claim 9 is characterized in that, described valve seat and described a plurality of plug comprise that a connector is used for described a plurality of plugs one and is installed in described valve seat by described fluid passage.
13, ball valve as claimed in claim 9 is characterized in that, described opening comprises one along the elongated open that extends perpendicular to the plane of a transverse axis, and described valve member rotates around this transverse axis in described valve casing.
14, ball valve as claimed in claim 13 is characterized in that, described elongated open comprises a parabola opening so that provide an equal percentage Flow characteristics for described valve member.
15, ball valve as claimed in claim 9, it is characterized in that, described adverse current and following current passage have with described hole and become columnar cross section substantially, and a plurality of openings in wherein said a plurality of plug have the cross section of the described fluid passage of the partial occlusion of being adapted to, and described predetermined flox condition is provided thus.
16, ball valve as claimed in claim 9 is characterized in that, described valve member is made with copper or stainless steel.
17, ball valve as claimed in claim 9 is characterized in that, described a plurality of plugs are made of plastics.
18, a kind ofly provide basic, it is characterized in that described ball valve comprises for the ball valve of linear capacity FLOW CONTROL:
One has the valve casing that passes the passage that wherein extends along its longitudinal shaft;
One valve member is contained in the described valve casing, and have pass wherein extend and and the hole of described channel alignment, described valve member rotates around a transverse axis between the Kai Heguan position, like this, open and close when rotating between the position described respectively when described valve member, described hole and described passage define the fluid passage that can adjust between maximum flow rates and minimal flow speed; And
One strides across the volume controlled part with parabola opening of described fluid passage elongation substantially, described parabola opening have parabolic shape with the described valve member of box lunch when described each move angle of opening and close between the position rotates, equal percentage flow characteristic substantially is provided between described maximum flow rates and minimal flow speed.
19, ball valve as claimed in claim 18 is characterized in that, described volume controlled part comprises that a cross-over connection is installed in the volume controlled plug in the described fluid passage.
20. ball valve as claimed in claim 19 is characterized in that, described volume controlled plug and described valve member comprise a connector, are used for that described volume controlled plug is passed described hole and are installed in described valve member.
21. ball valve as claimed in claim 19 is characterized in that, described volume controlled plug and described valve seat comprise that a connector is used for described volume controlled plug is installed in described valve seat by described passage.
22. ball valve as claimed in claim 19 is characterized in that, described connector is included in leg on the described volume controlled plug to be used for being accommodated in the depression of described valve member.
23. ball valve as claimed in claim 19 is characterized in that, described connector comprise a calibrating device be used for when described volume controlled plug is installed on the described valve member along perpendicular to the plane of described transverse axis with described parabolic shape opening orientation.
24. ball valve as claimed in claim 18, it is characterized in that, described volume controlled part comprises that overlapping cross-over connection respectively is installed in volume controlled plug on the described fluid passage, each volume controlled plug comprises the parabolic shape opening of the different size that passes it, and described thus this cover volume controlled plug can provide a series of predetermined flox conditions by described fluid passage.
25. one kind can provide by it predetermined flox condition ball valve, it is characterized in that described ball valve comprises:
One has by the adverse current of wherein extending and the valve casing of following current passage, described adverse current and following current passage put in the described valve casing valve seat and from wherein passing, formed the longitudinal axis by described valve seat thus;
One is installed in rotation on the valve member in the described valve seat, and described valve member has the hole by its extension, and the described longitudinal axis is aimed in described hole, and described hole and described adverse current and following current passage define a fluid passage by described valve casing jointly; And
The part of described valve seat strides across the stretching, extension of described fluid passage and has an elongated open to be used to provide the predetermined flox condition by described fluid passage.
26. ball valve as claimed in claim 25 is characterized in that, the described part that strides across the described valve seat that extends described fluid passage is dismountable.
27. one kind is attached to a plug that is installed in rotation on the valve member on the ball valve, and the cardinal principle equal percentage flow characteristic by the fluid passage of stretching through ball valve is provided, and it is characterized in that plug comprises:
One has the discoid pieces that becomes convex shape substantially corresponding to the outer surface of valve member; And
One is in the opening in the described discoid pieces, described opening has parabolic shape to be opened and closes between the position when rotating with each move angle at it when valve member being adapted to, and provides the Flow characteristics of equal percentage substantially between maximum flow rates by the fluid passage and minimal flow speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100143 CN1223350A (en) | 1998-01-09 | 1999-01-11 | Insert for flow throttling ball valves |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/004,946 | 1998-01-09 | ||
| CN 99100143 CN1223350A (en) | 1998-01-09 | 1999-01-11 | Insert for flow throttling ball valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1223350A true CN1223350A (en) | 1999-07-21 |
Family
ID=5269822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100143 Pending CN1223350A (en) | 1998-01-09 | 1999-01-11 | Insert for flow throttling ball valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1223350A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102947630A (en) * | 2010-04-30 | 2013-02-27 | 阿斯顿约翰逊公司 | Vacuum control valve for vacuum drainage system |
| CN103791117A (en) * | 2014-01-24 | 2014-05-14 | 北京航空航天大学 | High-adjustable-ratio small-flow linear control regulating valve |
| CN104067007A (en) * | 2012-05-28 | 2014-09-24 | 美卓自动化有限公司 | Attachment ring and valve |
| CN105221817A (en) * | 2015-10-16 | 2016-01-06 | 歌思（天津）低温设备有限公司 | A kind of rock gas pneumatic ball valve switch speed control device |
| CN108662186A (en) * | 2017-03-31 | 2018-10-16 | 浙江三花汽车零部件有限公司 | A kind of motor-driven valve |
| CN109681661A (en) * | 2018-12-27 | 2019-04-26 | 海宁市英德赛电子有限公司 | The control valve of special gas steel cylinder |
-
1999
- 1999-01-11 CN CN 99100143 patent/CN1223350A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947630A (en) * | 2010-04-30 | 2013-02-27 | 阿斯顿约翰逊公司 | Vacuum control valve for vacuum drainage system |
| CN102947630B (en) * | 2010-04-30 | 2015-01-21 | 阿斯顿约翰逊公司 | Vacuum control valve for vacuum drainage system |
| CN104067007A (en) * | 2012-05-28 | 2014-09-24 | 美卓自动化有限公司 | Attachment ring and valve |
| CN104067007B (en) * | 2012-05-28 | 2016-05-25 | 美卓流控有限公司 | Attached ring and valve |
| CN103791117A (en) * | 2014-01-24 | 2014-05-14 | 北京航空航天大学 | High-adjustable-ratio small-flow linear control regulating valve |
| CN105221817A (en) * | 2015-10-16 | 2016-01-06 | 歌思（天津）低温设备有限公司 | A kind of rock gas pneumatic ball valve switch speed control device |
| CN108662186A (en) * | 2017-03-31 | 2018-10-16 | 浙江三花汽车零部件有限公司 | A kind of motor-driven valve |
| CN109681661A (en) * | 2018-12-27 | 2019-04-26 | 海宁市英德赛电子有限公司 | The control valve of special gas steel cylinder |
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