CN101737370B - Fast hydraulic change-over valve - Google Patents
Fast hydraulic change-over valve Download PDFInfo
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- CN101737370B CN101737370B CN2010101046362A CN201010104636A CN101737370B CN 101737370 B CN101737370 B CN 101737370B CN 2010101046362 A CN2010101046362 A CN 2010101046362A CN 201010104636 A CN201010104636 A CN 201010104636A CN 101737370 B CN101737370 B CN 101737370B
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- valve
- spool
- spring
- valve opening
- chamber
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- 238000013016 damping Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The invention discloses a fast hydraulic change-over valve which comprises a valve body, a sleeve and a valve core; the valve core is arranged in the valve hole of the valve body; one end of the valve body is provided with an external thread and connected with the thread of the sleeve; the sleeve is provided with a spring cavity, the spring cavity is internally provided with a spring, and the spring is also arranged in the valve hole and contacted with the valve core; the wall of the valve body is provided with an oil inlet cavity, a working oil cavity and an returning cavity which are all communicated with the valve hole and arranged in sequence along the direction from the end provided with the external thread to the other end far away from the external thread; the valve core is provided with blind holes along the central axis of the valve core beginning from the end face opposite to the spring cavity; the shaft neck of the valve core is provided with radial holes communicated with the blind holes, the entrances of the blind holes are in thread connection with damping thread plugs, and the damping thread plugs are internally provided with throttle holes. The invention has the advantages that the valve core can be fast reset, and has short motion distance during resetting; the requirement on rigidity of the spring is low, and the valve core opening speed is accelerated; the volume of the control cavity is reduced, and the valve core has fast change-over speed; the structure is simple, the assembly and disassembly are convenient, and the assembly space is saved efficiently.
Description
Technical field
The present invention relates to a kind of hydraulicchange-over valve, belong to the hydraulic control field.
Background technique
Traditional hydraulicchange-over valve uses Returnning spring to reset mostly, application for high frequency sound, in order to accelerate the valve core reset speed of hydraulicchange-over valve, need to improve the spring rate of Returnning spring, the required spring force that overcomes when yet raising Returnning spring rigidity can strengthen the hydraulicchange-over valve unlatching, thereby the opening speed of the hydraulicchange-over valve that slowed down, the unlatching of therefore traditional hydraulicchange-over valve and reset speed be mutual contradiction often, and when being in the enable possition owing to traditional hydraulicchange-over valve, Returnning spring is compressed to limit position, therefore spool needs one section long idle stroke of motion earlier when hydraulicchange-over valve resets, cause resetting time longer, commutating speed is slow.
Summary of the invention
The purpose of this invention is to provide the fast hydraulicchange-over valve of a kind of commutating speed, to overcome the shortcoming that traditional hydraulicchange-over valve commutation action lags behind.
For achieving the above object, the technological means that the present invention taked is: this fast hydraulic change-over valve mainly comprises valve body, sleeve and spool, and spool places in the valve opening of valve body; One end of valve body is provided with outside thread and connects with bush whorl, is provided with spring chamber in the sleeve, and spring chamber is built-in with spring, and this spring places simultaneously in the valve opening and with spool and contacts; On the wall of valve body, be provided with oil suction chamber, working oil chamber, the oil back chamber that all communicates successively to direction with valve opening away from this externally threaded the other end from being provided with an externally threaded end, wherein, central axis along spool is provided with blind hole to described spool from itself and spring chamber opposing end faces, the axle journal place of described spool is provided with radial hole, this radial hole is communicated with blind hole, inlet's scyewed joint of described blind hole has the damping screw plug, is provided with throttle orifice in the described damping screw plug.
Further, be provided with spring seat in the spring chamber of sleeve of the present invention, there are the gap in spring seat and spool, be provided with a round taper hole separately on the end face of the bottom of spring chamber and spring seat, clamping has steel ball between described two round taper holes, and the central axis of described round taper hole, spring seat and spool is overlapping.
Further, valve opening of the present invention stepped away from an externally threaded end, spool places the part than large diameter of having of valve opening, and the part with less internal diameter of valve opening is equipped with the control push rod, the part Spielpassung with less internal diameter of this control push rod and valve opening; Also be provided with the draining chamber that communicates with valve opening on the wall of valve body, this draining chamber is between ladder surface spool and control push rod opposing end faces and valve opening.
Further, the present invention described valve body away from an externally threaded end in be provided with counterbore, sealing and fixing has the support guide pin bushing on the inwall of counterbore, this center hole that supports guide pin bushing is communicated with valve opening and is coaxial, the center hole that supports guide pin bushing is built-in with the control push rod, this control push rod and the center hole Spielpassung that supports guide pin bushing; Also be provided with the draining chamber that communicates with valve opening on the wall of valve body, this draining chamber is between counterbore bottom surface spool and control push rod opposing end faces and valve body.
Another kind of fast hydraulic change-over valve of the present invention mainly comprises valve body, sleeve and spool, and spool places in the valve opening of valve body; One end of valve body is provided with outside thread and connects with bush whorl, is provided with spring chamber in the sleeve, and spring chamber is built-in with spring, and this spring places simultaneously in the valve opening and with spool and contacts; On the wall of valve body, be provided with oil suction chamber, working oil chamber, the oil back chamber that all communicates successively to direction with valve opening away from this externally threaded the other end from being provided with an externally threaded end, wherein, described valve opening stepped away from an externally threaded end, spool places the part than large diameter of having of valve opening, the part with less internal diameter of valve opening is equipped with the control push rod, the part Spielpassung with less internal diameter of this control push rod and valve opening; Also be provided with the draining chamber that communicates with valve opening on the wall of valve body, this draining chamber is between ladder surface spool and control push rod opposing end faces and valve opening.
In addition, fast hydraulic change-over valve of the present invention can also be to comprise valve body, sleeve and spool, and spool places in the valve opening of valve body; One end of valve body is provided with outside thread and connects with bush whorl, is provided with spring chamber in the sleeve, and spring chamber is built-in with spring, and this spring places simultaneously in the valve opening and with spool and contacts; On the wall of valve body, be provided with oil suction chamber, working oil chamber, the oil back chamber that all communicates successively to direction with valve opening away from this externally threaded the other end from being provided with an externally threaded end, wherein, described valve body away from an externally threaded end in be provided with counterbore, sealing and fixing has the support guide pin bushing on the inwall of counterbore, this through hole that supports guide pin bushing is communicated with valve opening and is coaxial, support guide pin bushing and be built-in with the control push rod, this control push rod and support guide pin bushing Spielpassung; Also be provided with the draining chamber that communicates with valve opening on the wall of valve body, this draining chamber is between counterbore bottom surface spool and control push rod opposing end faces and valve body.
Compared with prior art, advantage of the present invention is:
(1) the part high pressure oil that will flow into active chamber is introduced spring chamber by the feedback oil circuit, and the spool end that spool is contacted with spring when resetting is subjected to the acting in conjunction of high pressure oil pressure and spring force, and valve core reset speed is fast; Spool is in the equilibrium position under the force action of control oily active force, feedback high pressure oil active force and spring force, thus the distance that need move when having shortened valve core reset.
(2) since during the valve core reset of hydraulicchange-over valve by feedback high pressure oil active force, reduced requirement to spring rate, can select the spring of less spring rate during practical application, the required spring force that overcomes when having reduced spool and opening, thus accelerated the opening speed of spool.
(3) by the control push rod is set in valve opening, make control oil act on control push rod end face, promote the spool commutation by the control push rod, reduced the volume of control chamber, the spool commutating speed is fast.
(4) adopt discrete component, simple in structure, easy accessibility, the mounting type of fast hydraulic change-over valve are the thread cartridge formula, effectively save installing space.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of fast hydraulic change-over valve in the embodiment of the invention 1;
Fig. 2 is the structure cross-sectional schematic of fast hydraulic change-over valve in the embodiment of the invention 2;
Fig. 3 is the structure cross-sectional schematic of fast hydraulic change-over valve in the embodiment of the invention 3;
Fig. 4 is the structure cross-sectional schematic of the damping screw plug of fast hydraulic change-over valve of the present invention;
Fig. 5 is the structure cross-sectional schematic of the described spring seat of fast hydraulic change-over valve of the present invention.
Embodiment
As Fig. 1, Fig. 4, shown in Figure 5, fast hydraulic change-over valve of the present invention mainly comprises a valve body 16 and sleeve 25.One end of valve body 16 is shaped on outside thread (in Fig. 1 to Fig. 3, this outside thread is at the right-hand member of valve body 16), the inside of sleeve 25 is machined grooves and be shaped on internal thread in groove correspondingly, so that valve body 16 and sleeve 25 are carried out scyewed joint, and the end face that makes valve body 16 be shaped on outside thread one end is close to the groove surface of sleeve 25.Valve body 16 inside are provided with a through hole as valve opening 6, and spool 9 is installed in the valve opening 6, and the external diameter match grinding processing of the internal diameter of valve opening 6 and spool 9 when pilot operated directional control valve is worked, makes spool 9 left and right sides to-and-fro motion in valve opening 6, to realize the switching of oil circuit.On the wall of valve body 16 from being provided with an externally threaded end to being provided with the oil suction chamber 14, working oil chamber 10, the oil back chamber 7 that all communicate successively with valve opening 6 away from the direction of this externally threaded the other end (in Fig. 1 to Fig. 3, being) from the right-hand member of valve body 16 direction to left end.The axle journal place of spool 9 is processed with radial hole 12, is processed with blind hole 13 along the central axis of spool 9, and working oil chamber 10 and spring chamber 21 are connected by radial hole 12 and blind hole 13.Inlet in blind hole 13 is shaped on screw 19, and the inside of screw 19 is equipped with damping screw plug 18, and the inside of damping screw plug 18 also is provided with throttle orifice 17.The effect that damping screw plug 18 is installed is that the throttling action by throttle orifice 17 makes spool 9 motions steadily, the impact when reducing spool 9 commutations.Be processed with 2 compensating grooves 15 in each compartment of terrain, the both sides of axle journal on the outer side wall of spool 9, each compensating groove 15 is offered along the outer side wall circumferencial direction of spool 9, compensating groove 15 can reduce hydraulic card clamping force, and reduces the oil liquid leakage of spool 9 and valve body 16 cooperation places, makes spool 9 work more reliable.
120 ° of round taper holes of processing on the bottom end face of the spring chamber 21 of sleeve 25,120 ° of round taper holes of processing on the end face of the stub end bottom of spring seat 23, steel ball 24 is put into this two round taper holes, and steel ball 24 grips by these two round taper holes; And in the spring chamber 21 of sleeve 25 mounting spring seat 23, there is the gap in spring seat 23 with spool 9, again spring 20 is enclosed within outside the spring seat 23, makes the central axis of above-mentioned two round taper holes, spring seat 23 and spool 9 overlapping simultaneously, guarantee spool 9 stressed be vertically thrust.One end of spring 20 is against on the spring seat 23, and the other end is against on the spool 9, valve body 16 and sleeve 25 are carried out scyewed joint after, spring 20 is by precompression, spring force guarantees that spool 9 is in definite initial position, and provides deboost when spool 9 resets.The purpose of steel ball 24 of packing into is by the compensating action of steel ball 24 with the conical surface, makes spring seat 23 centerings, and makes the spring force stepless action on spool 9, and the angle design of round taper hole becomes 120 ° can improve processing circularity. O type circle 3,8,11 is housed on valve body 16, O type circle 22 is housed on sleeve 25, be used to seal fluid and prevent to leak.
As shown in Figure 2, valve opening 6 stepped away from an externally threaded end (in Fig. 2, being the left end of valve opening 6), the ladder surface 27 of valve opening 6 is distinguished into two-part with this end valve hole 6.Wherein, as shown in Figure 2, the valve opening internal diameter of the left part of ladder surface 27 is little with respect to the valve opening internal diameter of the right side part of ladder surface 27, and is built-in with control push rod 2 at the valve opening of the left part of ladder surface 27, this control push rod 2 and this part valve opening 6 Spielpassung; The valve opening internal diameter of the right side part of ladder surface 27 is bigger, and it is built-in with spool 9.As preferred implementation of the present invention, control push rod 2 also is provided with convex shoulder, this convex shoulder is positioned at the valve opening of the right side part of ladder surface 27, and the convex shoulder part of control push rod 2 can contact with ladder surface 27, promote control push rod 2 when spool 9 resets and be moved to the left, by the left-hand of the convex shoulder of control push rod 2 and 27 pairs of control of ladder surface push rod 2 move carry out spacing.
As shown in Figure 3, further, valve body 16 away from an externally threaded end (in Fig. 3, be the left end of valve opening 6) in be provided with counterbore, sealing and fixing has the guide pin bushing 5 of support on the inwall of counterbore, this center hole that supports guide pin bushing 5 is communicated with valve opening 6 and is coaxial, the center hole that supports guide pin bushing 5 is built-in with control push rod 2, and this control push rod 2 and the center hole Spielpassung that supports guide pin bushing 5 will be controlled push rod 2 and pack into and support the center hole of guide pin bushing 5 during installation, and in the counterbore of the whole valve body 16 of packing into, in the outside of supporting guide pin bushing 5 circlip 1 is installed, is used for fixing and supports guide pin bushing 5, prevent to become flexible, support on the guide pin bushing O type circle 4 is housed, be used to seal fluid.Also be provided with the draining chamber 26 that communicates with valve opening 6 on the wall of valve body 16, this draining chamber 26 is between counterbore bottom surface 28 spool 9 and control push rod 2 opposing end faces and valve body 16.
The working procedure of selector valve of the present invention is as follows:
As shown in Figure 1, under the original state, do not have pressure oil to enter in the valve opening 6, spool 9 remains on position, a left side under the effect of spring force, and active chamber 10 is linked up by the axle journal place of spool 9 with oil back chamber 7, and oil suction chamber 14 draining chambeies are sealed by the shoulder of spool 9.When cut-in pressure in the valve opening 6 is oily, pressure oil acts on the left end end face of spool 9, making spool 9 overcome spring force moves right with other resistances, oil back chamber 7 is sealed by the shoulder of spool 9, oil suction chamber 14 is linked up by the axle journal place of spool 9 with active chamber 10, simultaneously, part high pressure oil is earlier after radial hole 12, throttle orifice 17 in blind hole 13 and the damping screw plug 18 enters the spring chamber 21 of sleeve 25 inside, this part feedback high pressure oil acts on the deboost that forms on the right side of spool 9 left, the thrust that spool 9 is subjected on the left end end face, be in an equilibrium position under the force action of spring force and feedback high pressure oil active force, this moment, hydraulicchange-over valve was in the enable possition.When the moment that removes pressure oil, still accumulate spring chamber 21 inside the feedback high pressure oil, under the effect of feedback high pressure oil active force and spring force, spool 9 is pushed to the left end initial position rapidly, make oil suction chamber 14 by the sealing of the shoulder of spool 9, oil back chamber 7 is linked up mutually with active chamber 10, and the fluid of active chamber 10 flows back to fuel tank by oil back chamber 7, fluid in the valve opening 6 flows back to fuel tank by the outside oil circuit of valve body 16, and this moment, hydraulicchange-over valve was in the closed position.
Further, as shown in Figure 2, be built-in with control push rod 2 at valve opening 6, pressure oil acts on the left side of control push rod 2, because the left side area of control push rod 2 is less, the cavity volume that makes fluid only need be full of small volume just can promote control push rod 2 and move right, and promotes spool 9 by control push rod 2 and commutates to the right, has accelerated the commutating speed of spool 9.The leakage fluid of valve opening 6 inside flows back to fuel tank by draining chamber 26.
Further, as shown in Figure 3, be provided with dismountable support guide pin bushing 5 in the counterbore of valve body 16, change the occasion of the face area of control push rod 2 for needs, only need to change to support guide pin bushing 5 and push rod 2, needn't dismantle valve body 16 and process valve opening 6 again, improved working efficiency.
Claims (4)
1. fast hydraulic change-over valve, it comprises valve body (16), sleeve (25) and spool (9), spool (9) places in the valve opening (6) of valve body (16); One end of valve body (16) be provided with outside thread and with sleeve (25) scyewed joint, be provided with spring chamber (21) in the sleeve (25), spring chamber (21) is built-in with spring (20), this spring (20) places in the valve opening (6) simultaneously and contacts with spool (9); On the wall of valve body (16), be provided with the oil suction chamber (14) that all communicates successively to direction with valve opening (6) away from this externally threaded the other end from being provided with an externally threaded end, working oil chamber (10), oil back chamber (7), it is characterized in that: the central axis along spool is provided with blind hole (13) to described spool (9) from itself and spring chamber (21) opposing end faces, the axle journal place of described spool (9) is provided with radial hole (12), this radial hole (12) is communicated with blind hole (13), inlet's scyewed joint of described blind hole (13) has damping screw plug (18), is provided with throttle orifice (17) in the described damping screw plug (18).
2. a kind of fast hydraulic change-over valve according to claim 1, it is characterized in that: be provided with spring seat (23) in the spring chamber (21) of described sleeve (25), there is the gap in spring seat (23) with spool (9), be provided with a round taper hole separately on the end face of the bottom of spring chamber (21) and spring seat (23), clamping has steel ball (24) between described two round taper holes, and the central axis of described round taper hole, spring seat (23) and spool (9) is overlapping.
3. a kind of fast hydraulic change-over valve according to claim 1 and 2, it is characterized in that: described valve opening (6) stepped away from an externally threaded end, spool (9) places the part than large diameter of having of valve opening (6), the part with less internal diameter of valve opening (6) is equipped with control push rod (2), the part Spielpassung with less internal diameter of this control push rod (2) and valve opening (6); Also be provided with the draining chamber (26) that communicates with valve opening (6) on the wall of valve body (16), this draining chamber (26) is positioned between the ladder surface (27) spool (9) and control push rod (2) opposing end faces and valve opening (6).
4. a kind of fast hydraulic change-over valve according to claim 1 and 2, it is characterized in that: described valve body (16) away from an externally threaded end in be provided with counterbore, sealing and fixing has support guide pin bushing (5) on the inwall of counterbore, this center hole that supports guide pin bushing (5) is communicated with valve opening (6) and is coaxial, the center hole that supports guide pin bushing (5) is built-in with control push rod (2), this control push rod (2) and the center hole Spielpassung that supports guide pin bushing (5); Also be provided with the draining chamber (26) that communicates with valve opening (6) on the wall of valve body (16), this draining chamber (26) is positioned between the counterbore bottom surface (28) spool (9) and control push rod (2) opposing end faces and valve body (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101046362A CN101737370B (en) | 2010-01-29 | 2010-01-29 | Fast hydraulic change-over valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101046362A CN101737370B (en) | 2010-01-29 | 2010-01-29 | Fast hydraulic change-over valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737370A CN101737370A (en) | 2010-06-16 |
| CN101737370B true CN101737370B (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101046362A Active CN101737370B (en) | 2010-01-29 | 2010-01-29 | Fast hydraulic change-over valve |
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| Country | Link |
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| CN (1) | CN101737370B (en) |
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| CN108518378A (en) * | 2018-05-18 | 2018-09-11 | 宁波真格液压科技有限公司 | A kind of automatic diverter valve for explosion-proof environment |
| CN108691835B (en) * | 2018-06-14 | 2019-10-25 | 江苏艾伦弗罗机械制造有限公司 | Hydraulic control-hand-operated double controlled reversal valve |
| CN110748528B (en) * | 2019-10-28 | 2021-05-14 | 杭州青流液压设备制造有限公司 | Control valve for oil cylinder |
| CN111188801B (en) * | 2020-01-13 | 2022-06-10 | 宝鸡石油机械有限责任公司 | Two-position six-way hydraulic control reversing valve |
| CN114382736A (en) * | 2021-12-07 | 2022-04-22 | 宁波雪隆王液压科技有限公司 | Novel flow gathering valve and valve group system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3786827A (en) * | 1973-03-16 | 1974-01-22 | Caterpillar Tractor Co | Flow control valve |
| CN2206391Y (en) * | 1993-05-03 | 1995-08-30 | 朴龙奎 | Three-way change valve |
| EP1054163A1 (en) * | 1998-12-02 | 2000-11-22 | Hitachi Construction Machinery Co., Ltd. | Directional control valve device |
| CN1072323C (en) * | 1994-09-13 | 2001-10-03 | 速睦喜股份有限公司 | Pilot operated directional control valve |
| CN2751169Y (en) * | 2004-11-19 | 2006-01-11 | 中国农业大学 | Hydraulic controlled reversing valve |
| CN201621119U (en) * | 2010-01-29 | 2010-11-03 | 浙江大学 | Quick hydraulic changeover valve |
-
2010
- 2010-01-29 CN CN2010101046362A patent/CN101737370B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3786827A (en) * | 1973-03-16 | 1974-01-22 | Caterpillar Tractor Co | Flow control valve |
| CN2206391Y (en) * | 1993-05-03 | 1995-08-30 | 朴龙奎 | Three-way change valve |
| CN1072323C (en) * | 1994-09-13 | 2001-10-03 | 速睦喜股份有限公司 | Pilot operated directional control valve |
| EP1054163A1 (en) * | 1998-12-02 | 2000-11-22 | Hitachi Construction Machinery Co., Ltd. | Directional control valve device |
| CN2751169Y (en) * | 2004-11-19 | 2006-01-11 | 中国农业大学 | Hydraulic controlled reversing valve |
| CN201621119U (en) * | 2010-01-29 | 2010-11-03 | 浙江大学 | Quick hydraulic changeover valve |
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| Publication number | Publication date |
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| CN101737370A (en) | 2010-06-16 |
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