CN204267742U - Control valve for small flows - Google Patents
Control valve for small flows Download PDFInfo
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- CN204267742U CN204267742U CN201420654464.XU CN201420654464U CN204267742U CN 204267742 U CN204267742 U CN 204267742U CN 201420654464 U CN201420654464 U CN 201420654464U CN 204267742 U CN204267742 U CN 204267742U
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Abstract
The utility model relates to control valve for small flows.Guide sleeve to be contained in valve pocket and to be placed on spacer, and liner clamp to be contained in the endoporus of guide sleeve and to be placed on valve seat and by guide sleeve pushing down; Sealing soft lining is contained in the inner chamber of liner clamp, and liner clamp is provided with the center of the soft lining of sealing and axially runs through the bush assembly central through bore be communicated with; Spool activity is assemblied in guide sleeve endoporus, spacer endoporus, bush assembly central through bore and valve base center hole, the periphery wall on spool top and the inner hole wall of guide sleeve seal and are slidably matched, and the outer wall of spool bottom and the inner wall sealing of bush assembly central through bore and valve base center hole are slidably matched; The outer wall of the spool bottom V-arrangement be provided with along valve core length direction trend is cut sth. askew groove, and V-arrangement groove of cutting sth. askew has oblique angle α at length direction, and V-arrangement groove of cutting sth. askew has angle β in cross-sectional direction.The utility model, by meeting onsite application requirement well, solves tiny flow quantity and regulates, reduce manufacture cost, improve control accuracy.
Description
Technical field
The utility model relates to a kind of control valve for small flows, belongs to valve manufacturing technical field.
Background technique
At the control valve for small flows that tiny flow quantity control valve field is used, the structure of what domestic a lot of producers adopted is mostly aciculiform spool, by meeting the requirement of Flow characteristics to the spool shape correction of aciculiform spool, general aciculiform spool is of a size of very little, only has 1 ~ 2mm, although the small flow valve arrangement of this aciculiform spool can meet the usage requirement of small flow valve, but there will be some intrinsic shortcomings in the using process of reality: aciculiform spool easily ruptures, because size is less, so be easy in actual use occur phenomenon of rupture, easily wash away, because size is less, fluid flow velocity is herein very fast, be easy to produce destructiveness to aciculiform spool wash away, destroy aciculiform spool, degree of regulation is poor, because the curve of aciculiform spool by flow test data then workman grind out by hand, result in each all different, make poor stability, and regulate unstable, precision is poor, manufacture cost is high, because the correction of small flow spool is by manually having come, once manually correct mistakes, again spool will be made, and in the process revised, the manpower and materials of meeting at substantial, be difficult to the object meeting High-efficient Production.
In order to improve the domestic technique level of this occasion lower valve, simultaneously also for my company enters rapidly this high-end field, my company is through creationary design, have developed a kind of control valve for small flows, unborn problem is thoroughly eliminated, both meet above working condition requirement, extend again the working life of valve.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of control valve for small flows is provided, it can meet onsite application requirement well by novel structural design, fundamentally solve tiny flow quantity to regulate, reduce manufacture cost, improve control accuracy, both meet above usage requirement, extend again the working life of valve, provide cost savings to domestic production enterprise and provide necessary guarantee to continuous seepage.
Technological scheme according to the utility model provides: control valve for small flows, comprise valve body, valve gap, spool, valve rod, valve seat and spacer, valve pocket is provided with in described valve body, valve seat is contained in valve pocket, valve seat is supported by the step in valve body valve pocket, the contact position of valve seat and valve body is in being tightly connected, and valve seat is provided with valve base center hole, and described valve gap fixing seal is arranged on body top; Described spacer to be contained in valve pocket and to be placed on valve seat, offsets, spacer perisporium is evenly provided with several through holes bottom spacer with valve seat top; Described valve rod is through valve gap, and utilize sealing configuration to seal between valve rod and valve gap, valve rod lower end is connected with spool; Described valve body is provided with medium inlet and media outlet, and medium inlet is communicated with valve seat mounting hole lower end, and media outlet is communicated with spacer space outerpace with valve seat; It is characterized in that: described control valve for small flows also comprises the soft lining of guide sleeve, liner clamp and sealing, described guide sleeve to be contained in valve pocket and to be placed on spacer, offsets bottom guide sleeve with spacer top; Described liner clamp to be contained in the endoporus of guide sleeve and to be placed on valve seat, and liner clamp edge is pushed down by guide sleeve lower end; The soft lining of described sealing is contained in the inner chamber of liner clamp, and liner clamp is provided with the center of the soft lining of sealing and axially runs through the bush assembly central through bore be communicated with; Described spool activity is assemblied in guide sleeve endoporus, spacer endoporus, bush assembly central through bore and valve base center hole, the periphery wall on spool top and the inner hole wall of guide sleeve seal and are slidably matched, and the outer wall of spool bottom and the inner wall sealing of bush assembly central through bore and valve base center hole are slidably matched; The outer wall of the described spool bottom V-arrangement be provided with along valve core length direction trend is cut sth. askew groove, described V-arrangement groove of cutting sth. askew has oblique angle α at length direction, namely the cut sth. askew degree of depth of groove of V-arrangement becomes large by spool upper end gradually to spool lower end, and the cut sth. askew trough line of groove and the central axis of spool of V-arrangement has angle α; Described V-arrangement groove of cutting sth. askew has angle β in cross-sectional direction, namely V-arrangement cut sth. askew groove two madial walls between there is angle β.
As further improvement of the utility model, the soft lining of described sealing adopts polytetrafluoroethylene (PTFE) material to make.
As further improvement of the utility model, described valve cup bottom end face is provided with valve base sealing annular groove, in valve base sealing annular groove, be provided with valve washer; Described valve gap bottom end is provided with valve bonnet seal annular groove, is provided with valve gap packing ring in valve bonnet seal annular groove.
As further improvement of the utility model, described valve washer and valve gap packing ring all adopt winding packing ring.
As further improvement of the utility model, described sealing configuration comprises matrix liner, filler, filler spacer, filler pressing sleeve and Gland, stem outer circumference in described valve gap is provided with filler, matrix liner is provided with below filler, be provided with above filler spacer, filler in the middle of filler and be provided with filler pressing sleeve, filler pressing sleeve is pushed down by the Gland of side disposed thereon, and described Gland is fixedly connected with by the second fastening connection piece with between valve gap.
As further improvement of the utility model, described second fastening connection piece comprises the second stud and the second hexagon nut, and described second stud lower end is connected on gland, and the second stud upper end fills the second hexagon nut through spiral shell after Gland.
As further improvement of the utility model, described filler pressing sleeve inwall is provided with inner seal ring groove, and inner seal ring groove is built with an O RunddichtringO; Described filler pressing sleeve outer wall is provided with external sealed annular groove, and external sealed annular groove is built with the 2nd O RunddichtringO.
compared with prior art, tool has the following advantages the utility model:the utility model can meet onsite application requirement well by novel structural design, fundamentally solve tiny flow quantity to regulate, reduce manufacture cost, improve control accuracy, both above usage requirement had been met, extend again the working life of valve, provide cost savings to domestic production enterprise and provide necessary guarantee to continuous seepage.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of the utility model embodiment control valve for small flows.
Fig. 2 is the structural representation of spool in Fig. 1.
Fig. 3 is the B direction view of Fig. 2.
Fig. 4 is the A portion structure for amplifying schematic diagram in Fig. 1.
Description of reference numerals: 1-valve body, 1a-medium inlet, 1b-media outlet, 2-valve gap, 3-spool, 3a-V shape is cut sth. askew groove, 4-valve rod, 5-valve seat, 6-spacer, 7-guide sleeve, 8-first stud, 9-first hexagon nut, 10-filler spacer, 11-matrix liner, 12-filler, 13-filler pressing sleeve, 14-Gland, 15-second stud, 16-valve washer, 17-second hexagon nut, 18-the one O RunddichtringO, 19-the 2nd O RunddichtringO, 20-valve gap packing ring, 21-liner clamp, 22-seals soft lining.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in the figure: the control valve for small flows in embodiment is primarily of valve body 1, valve gap 2, spool 3, valve rod 4, valve seat 5, spacer 6, guide sleeve 7, first stud 8, first hexagon nut 9, filler spacer 10, matrix liner 11, filler 12, filler pressing sleeve 13, Gland 14, second stud 15, valve washer 16, second hexagon nut 17, an O RunddichtringO 18, the 2nd O RunddichtringO 19, valve gap packing ring 20, liner clamp 21 and seal the compositions such as soft lining 22.
As shown in Fig. 1 ~ Fig. 4, be provided with valve pocket in described valve body 1, valve seat 5 is contained in valve pocket, valve seat 5 is supported by the step in valve body 1 valve pocket, the contact position of valve seat 5 and valve body 1 is in being tightly connected, and valve seat 5 is provided with valve seat 5 center hole, and described valve gap 2 fixing seal is arranged on valve body 1 top; Described spacer 6 to be contained in valve pocket and to be placed on valve seat 5, offsets, spacer 6 perisporium is evenly provided with several through holes bottom spacer 6 with valve seat 5 top; Described valve rod 4 is through valve gap 2, and utilize sealing configuration to seal between valve rod 4 and valve gap 2, valve rod 4 lower end is connected with spool 3; Described valve body 1 is provided with medium inlet 1a and media outlet 1b, and medium inlet 1a is communicated with valve seat 5 mounting hole lower end, and medium inlet 1a is communicated with spacer 6 space outerpace with valve seat 5; Described guide sleeve 7 to be contained in valve pocket and to be placed on spacer 6, offsets bottom guide sleeve 7 with spacer 6 top; Described liner clamp 21 to be contained in the endoporus of guide sleeve 7 and to be placed on valve seat 5, and liner clamp 21 edge is pushed down by guide sleeve 7 lower ends; The soft lining 22 of described sealing is contained in the inner chamber of liner clamp 21, and liner clamp 21 is provided with the center of the soft lining 22 of sealing and axially runs through the bush assembly central through bore be communicated with; The activity of described spool 3 is assemblied in guide sleeve 7 endoporus, spacer 6 endoporus, bush assembly central through bore and valve seat 5 center hole, the periphery wall on spool 3 top and the inner hole wall of guide sleeve 7 seal and are slidably matched, and the inner wall sealing of the outer wall of spool 3 bottom and bush assembly central through bore and valve seat 5 center hole is slidably matched; The outer wall of the described spool 3 bottom V-arrangement be provided with along spool 3 length direction trend is cut sth. askew groove 3a, the described V-arrangement groove 3a that cuts sth. askew has oblique angle α at length direction, namely the cut sth. askew degree of depth of groove 3a of V-arrangement becomes large by spool 3 upper end gradually to spool 3 lower end, and the cut sth. askew trough line of groove 3a and the central axis of spool 3 of V-arrangement has angle α; The described V-arrangement groove 3a that cuts sth. askew has angle β in cross-sectional direction, namely V-arrangement cut sth. askew groove 3a two madial walls between there is angle β.
Technological standpoint is in the past thought, for control valve for small flows, want some shortcomings avoiding generation aciculiform spool 3 to produce, just consider to increase spool 3 size, but increase spool 3 size certainly will there will be again the problem being difficult to meet small flow adjustment.The utility model have employed a kind of structural design of novelty, namely to cut sth. askew groove 3a by processing V-arrangement on the surface at spool 3, controls minimum discharge with the V-arrangement oblique angle α of groove 3a length direction and the angle β of cross-sectional direction that cuts sth. askew.Namely described V-arrangement cut sth. askew the oblique angle of groove 3a length direction and the angle of cross-sectional direction size will according to the flow coefficient of spool 3 minimum discharge [Cv value] require design.
From Fig. 2, Fig. 3 can find out, on described spool 3, the cut sth. askew otch area of groove 3a of V-arrangement is the length L of groove 3a of being cut sth. askew by V-arrangement, the diameter D of spool 3 bottom, V-arrangement cut sth. askew cross-sectional direction angle β tetra-parameters of groove 3a of the length direction oblique angle α of groove 3a and V-arrangement of cutting sth. askew determine, different Cv values can be designed by these four parameters, and the size of diameter D also can increase, effectively can avoid the situation of domestic use aciculiform spool 3 easy-rupturing like this, four above-mentioned parameters only need machining accuracy to ensure, common process technique can meet the demands, dramatically saves on cost of production, as long as these four parameters of all spools 3 are consistent, interchangeability can be possessed, quick-replaceable can be realized, long service life easy to maintenance, greatly reduce manpower, material resources, financial resources.
To cut sth. askew groove 3a owing to spool 3 devising V-arrangement, bring the sealing problem between spool 3 and valve seat 5 thus, the utility model devises the soft lining 22 of sealing to realize the sealing of this part for this reason.As can be seen from Figure 3, sealing soft lining 22 fits closely in liner clamp 21, and liner clamp 21 is tightly pressed on valve seat 5 by spacer 6 again, and spool 3 periphery is all embraced by the soft lining 22 of sealing, control the diameter and length that seal soft lining 22 well, spool 3 tightly will be embraced by the soft lining 22 of sealing.Seal the more of soft lining 22 compression, spool 3 is just tighter by what embrace, but the decrement sealing soft lining 22 must be controlled well, otherwise there will be locking situation, brings great inconvenience, or cannot debug at all debugging later.When sealing soft lining 22 and holding spool 3 tightly, medium can only flow out through the V-arrangement of the spool 3 groove 3a that cuts sth. askew, and effectively prevents medium from flowing out from the gap between spool 3 and valve seat 5, thus realize the object of small flow adjustment.And place is metal sealing due to spool 3 sealing surface, so just substantially increase media-resistant performance of flushing.In the utility model, the soft lining 22 of described sealing preferably adopts teflon [PTFE] material to make.
For the utility model, the calculating of the flow coefficient [Cv value] of spool 3 is also very important, the utility model is by first estimating a flow coefficient, then design V-arrangement according to this flow coefficient to cut sth. askew groove 3a, the result drawn finally by flow test, to calculate actual discharge coefficient, just the design on new spool 3 can be closed V-arrangement that symbol requires and to cut sth. askew groove 3a according to new flow coefficient.The like, also can design the small flow spool 3 of other different Cv values, even if it is also no problem no longer to do flow test.Just can find out rule through overtesting like this, obtain the Cv value computer program of complete set, different Cv value can be designed to meet onsite application requirement according to actual conditions.
As shown in Figure 1, described valve gap 2 with between valve body 1 by being fixedly connected with by the fastening connection piece of the first stud 8 with the first hexagon nut 9, first stud 8 lower end is threaded on valve body 1, and the first stud 8 upper end fills the first hexagon nut 9 through spiral shell after valve gap 2.
As shown in Figure 1,3, described valve seat 5 bottom end is provided with valve seat 5 closure gasket groove, in valve seat 5 closure gasket groove, be provided with valve washer 16; Described valve gap 2 bottom end is provided with valve gap 2 closure gasket groove, in valve gap 2 closure gasket groove, be provided with valve gap packing ring 20; Valve seat 5 can be ensured like this, between valve gap 2 and valve body 1, there is more excellent sealability.Described valve washer 16 and valve gap packing ring 20 preferably adopt and are wound around packing ring.
As shown in Figure 1, Figure 3, in the utility model, described sealing configuration forms primarily of matrix liner 11, filler 12, filler spacer 106, filler pressing sleeve 13 and Gland 14, valve rod 4 periphery in described valve gap 2 is provided with filler 12, matrix liner 11 is provided with below filler 12, be provided with above filler spacer 106, filler 12 in the middle of filler 12 and be provided with filler pressing sleeve 13, filler pressing sleeve 13 is pushed down by the Gland 14 of side disposed thereon, and described Gland 14 is fixedly connected with by the second fastening connection piece with between valve gap 2.Described second fastening connection piece forms primarily of the second stud 15 and the second hexagon nut 17, and described second stud 15 lower end is connected on gland, and the second stud 15 upper end fills the second hexagon nut 17 through spiral shell after Gland 14.
As shown in Figure 1, in the utility model, described filler pressing sleeve 13 inwall is provided with inner seal ring groove, and inner seal ring groove is built with an O RunddichtringO 18; Described filler pressing sleeve 13 outer wall is provided with external sealed annular groove, and external sealed annular groove is built with the 2nd O RunddichtringO 19.A described O RunddichtringO 18 is for improving the sealing between filler pressing sleeve 13 and valve rod 4, and described 2nd O RunddichtringO 19 is for improving the sealing between filler pressing sleeve 13 and valve gap 2.
Working principle of the present utility model and working procedure as follows:
During embody rule, medium flows into from medium inlet 1a, directly enter into below valve seat 5, if spool 3 is positioned at open position, V-arrangement on spool 3 groove 3a upper end of cutting sth. askew exceeds the upper end of bush assembly central through bore, medium will flow in spacer 6 by the groove 3a that cuts sth. askew of the V-arrangement on spool 3, and the through hole then on spacer 6 flow to media outlet 1b and flows out.If spool 3 is in the closed position, V-arrangement on spool 3 is cut sth. askew the upper end of groove 3a upper end lower than bush assembly central through bore, medium inflow V-arrangement cut sth. askew groove 3a be can give sealing soft lining 22 apply pressure, the soft lining 22 of sealing is compressed, seal the compression of soft lining 22 and will hold spool 3 tightly, ensure that sealing.
Claims (7)
1. control valve for small flows, comprise valve body (1), valve gap (2), spool (3), valve rod (4), valve seat (5) and spacer (6), described valve body is provided with valve pocket in (1), valve seat (5) is contained in valve pocket, valve seat (5) is supported by the step in valve body (1) valve pocket, the contact position of valve seat (5) and valve body (1) is in being tightly connected, and valve seat (5) is provided with valve seat (5) center hole, and described valve gap (2) fixing seal is arranged on valve body (1) top; Described spacer (6) to be contained in valve pocket and to be placed on valve seat (5), and spacer (6) bottom offsets with valve seat (5) top, and spacer (6) perisporium is evenly provided with several through holes; Described valve rod (4), through valve gap (2), utilizes sealing configuration to seal between valve rod (4) and valve gap (2), and valve rod (4) lower end is connected with spool (3); Described valve body (1) is provided with medium inlet (1a) and media outlet (1b), and medium inlet (1a) is communicated with valve seat (5) mounting hole lower end, and media outlet (1b) is communicated with spacer (6) space outerpace with valve seat (5); It is characterized in that: described control valve for small flows also comprises guide sleeve (7), liner clamp (21) and the soft lining of sealing (22), described guide sleeve (7) to be contained in valve pocket and to be placed on spacer (6), and guide sleeve (7) bottom offsets with spacer (6) top; Described liner clamp (21) to be contained in the endoporus of guide sleeve (7) and to be placed on valve seat (5), and liner clamp (21) edge is pushed down by guide sleeve (7) lower end; The soft lining of described sealing (22) is contained in the inner chamber of liner clamp (21), and liner clamp (21) is provided with the center of the soft lining of sealing (22) and axially runs through the bush assembly central through bore be communicated with; Described spool (3) activity is assemblied in guide sleeve (7) endoporus, spacer (6) endoporus, bush assembly central through bore and valve seat (5) center hole, the periphery wall on spool (3) top and the inner hole wall of guide sleeve (7) seal and are slidably matched, and the inner wall sealing of the outer wall of spool (3) bottom and bush assembly central through bore and valve seat (5) center hole is slidably matched; The outer wall of described spool (3) the bottom V-arrangement be provided with along spool (3) length direction trend is cut sth. askew groove (3a), described V-arrangement groove (3a) of cutting sth. askew has oblique angle α at length direction, namely the cut sth. askew degree of depth of groove (3a) of V-arrangement becomes large by spool (3) upper end gradually to spool (3) lower end, and the cut sth. askew trough line of groove (3a) and the central axis of spool (3) of V-arrangement has angle α; Described V-arrangement groove (3a) of cutting sth. askew has angle β in cross-sectional direction, namely V-arrangement cut sth. askew groove (3a) two madial walls between there is angle β.
2. control valve for small flows as claimed in claim 1, is characterized in that: the soft lining of described sealing (22) adopts polytetrafluoroethylene (PTFE) material to make.
3. control valve for small flows as claimed in claim 1, is characterized in that: described valve seat (5) bottom end is provided with valve seat (5) closure gasket groove, is provided with valve washer (16) in valve seat (5) closure gasket groove; Described valve gap (2) bottom end is provided with valve gap (2) closure gasket groove, is provided with valve gap packing ring (20) in valve gap (2) closure gasket groove.
4. control valve for small flows as claimed in claim 3, is characterized in that: described valve washer (16) and valve gap packing ring (20) all adopt and be wound around packing ring.
5. control valve for small flows as claimed in claim 1, it is characterized in that: described sealing configuration comprises matrix liner (11), filler (12), filler spacer (10) (6), filler pressing sleeve (13) and Gland (14), valve rod (4) periphery in described valve gap (2) is provided with filler (12), filler (12) below is provided with matrix liner (11), be provided with filler spacer (10) (6) in the middle of filler (12), filler (12) top is provided with filler pressing sleeve (13), filler pressing sleeve (13) is pushed down by the Gland (14) of side disposed thereon, be fixedly connected with by the second fastening connection piece between described Gland (14) with valve gap (2).
6. control valve for small flows as claimed in claim 5, it is characterized in that: described second fastening connection piece comprises the second stud (15) and the second hexagon nut (17), described second stud (15) lower end is connected on gland, the second stud (15) upper end through Gland (14) afterwards spiral shell fill the second hexagon nut (17).
7. control valve for small flows as claimed in claim 5, it is characterized in that: described filler pressing sleeve (13) inwall is provided with inner seal ring groove, inner seal ring groove is built with an O RunddichtringO (18); Described filler pressing sleeve (13) outer wall is provided with external sealed annular groove, and external sealed annular groove is built with the 2nd O RunddichtringO (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654464.XU CN204267742U (en) | 2014-11-04 | 2014-11-04 | Control valve for small flows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654464.XU CN204267742U (en) | 2014-11-04 | 2014-11-04 | Control valve for small flows |
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| Publication Number | Publication Date |
|---|---|
| CN204267742U true CN204267742U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420654464.XU Active CN204267742U (en) | 2014-11-04 | 2014-11-04 | Control valve for small flows |
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| Country | Link |
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| CN (1) | CN204267742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390015A (en) * | 2014-11-04 | 2015-03-04 | 无锡市亚迪流体控制技术有限公司 | Small-flow control valve |
-
2014
- 2014-11-04 CN CN201420654464.XU patent/CN204267742U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390015A (en) * | 2014-11-04 | 2015-03-04 | 无锡市亚迪流体控制技术有限公司 | Small-flow control valve |
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