CN202158025U - Cushion valve - Google Patents
Cushion valve Download PDFInfo
- Publication number
- CN202158025U CN202158025U CN2011202327984U CN201120232798U CN202158025U CN 202158025 U CN202158025 U CN 202158025U CN 2011202327984 U CN2011202327984 U CN 2011202327984U CN 201120232798 U CN201120232798 U CN 201120232798U CN 202158025 U CN202158025 U CN 202158025U
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- Prior art keywords
- valve
- hole
- oil
- inner core
- trimmer
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- Withdrawn - After Issue
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Abstract
The utility model relates to a cushion valve used in a hydraulic system of a crane and has the advantages that the moment when the crane falls from a hanging state, high-flow oil pressure can be effectively divided; and after a short time cushion, the cushion valve is automatically closed to ensure that the rotating speed of a motor can be accurately adjusted along with the oil pressure. The cushion valve comprises a shell, a head cover and a valve core which is arranged in the shell, wherein the valve core comprises a slide valve, a valve seat, a spring and an inner core; a wedge-shaped hole is arranged on the end socket of the slide valve and communicated with a flow guiding hole on the side wall of the valve seat; an one-way valve is arranged in the inner core; a damping hole is arranged on the side wall of the inner core; under high pressure, oil slowly enters an oil cavity between the slide valve and the head cover through the damping hole to ensure that the slide valve is driven to downwards slide in the valve seat until the cushion valve is gradually closed; and when the hung object falls to the ground, the oil pressure in an oil line drops, the oil in the oil cavity is rapidly discharged from the inner core, and the cushion valve is automatically restored to an open state.
Description
Affiliated technical field
The utility model relates to a kind of hydraulic control component, refers more particularly on a kind of crane to use the trimmer valve that can close voluntarily.
Background technique
In traditional hydraulic control system, like the hydraulic system of crane, the clockwise and anticlockwise loop of oil hydraulic motor is a symmetrical structure.Crane lifting when oil hydraulic motor is just changeing; Crane descends when oil hydraulic motor reverses.After crane was sling weight, the moment that descends from hovering to, the load of weight leaned on the high pressure oil in the oil hydraulic motor to support, because the oil hydraulic motor pressure change can produce once serious impact to hydraulic system and oil hydraulic motor in moment, the life-span of infringement oil hydraulic motor.Common solution is trimmer valve or trimmer valve that absorbs overflow of parallel connection of a current limliting amount of series connection on the oil circuit of oil hydraulic motor.
For example CN 200920224318 " is used for the trimmer valve on hydraulic support and the hydraulic jack ", is one and adopts many liquid pass holes structure, plays the trimmer valve of metering function.When oil circuit big flow attack of moment, trimmer valve withstands shocks, and reduces the impact to other hydraulic element.
For example CN 96246819 " hydraulic buffering valve " is exactly a kind of through parallel connection, absorbs the trimmer valve of overflow, can absorb the big flow of moment about 1 second, after oil pressure is returned to working state, progressively discharges the oil mass of its storage, plays the effect of buffering.The shoe cream room space is limited in its structure, and in a single day shoe cream room is full of oil, and trimmer valve promptly lost efficacy.
And for hydraulic systems such as cranes, above-mentioned two kinds of trimmer valves have been installed after, the oil pressure of part is cushioned valve shunting or current limliting, during the crane lifting, the moment of torsion when having reduced the startup of oil hydraulic motor is unfavorable for the weight of slinging.And behind the motor operation, the buffer function of trimmer valve also can influence the handling to motor rotary speed.
Summary of the invention
The utility model technical problem to be solved is: trimmer valve and the oil hydraulic motor parallel connection used on a kind of crane are provided, and crane can effectively be shunted oil shock from the moment that suspended state falls; After the short time buffering, trimmer valve cuts out automatically, and motor rotary speed can accurately be adjusted with oil pressure.
The utility model addresses the above problem the technological scheme that is adopted: a kind of trimmer valve, form by housing, top cover and the spool that is installed in the housing, and filler opening a mouth and oil outlet b mouth are arranged on the housing; Annular groove in a mouth and the housing communicates, and it is characterized in that said spool comprises guiding valve, valve seat, spring and inner core; Valve seat and housing are slidingly connected; Have pod apertures and annular groove to communicate on the sidewall of valve seat, valve seat has sliding valve hole in the middle of the bottom, and the b mouth on sliding valve hole and the housing communicates; Guiding valve is installed in the valve seat, is with spring on the guiding valve, and stretch in the sliding valve hole, an end of spring withstands on the step in the valve seat; Inner core embeds guiding valve inside and is fixedly connected with guiding valve, and the inner core center is a through hole, has a damping hole and through hole to communicate on the sidewall of inner core, and via bottoms is an one-way valve, and one-way valve communicates through the pod apertures at conduction hole and guiding valve sidewall middle part.
The lower end of said guiding valve has a plurality of wedged holes, and wedged hole quantity is identical with pod apertures quantity on the valve seat sidewall.
There is adjustment hole at said top cover center, regulates bolt and screws in the adjustment hole, and when the trimmer valve complete opening, the end face of inner core is withstood in the bottom surface of regulating bolt.
Said adjusting bolt top is equipped with a sealing plug.
Said damping hole is a tubaeform through hole, and end that the aperture is bigger and the pod apertures on the guiding valve communicate, and the inner through hole of end that the aperture is less and inner core communicates.
Be with back-up ring on the said inner core, it is inner that back-up ring embeds guiding valve, and inner core is fixedly connected with guiding valve.
Compared with prior art, the advantage of the utility model is:
Trimmer valve has not only played protective action to the moment impact of crane system, has overcome the drawback that existing trimmer valve influences crane behaviour performance again.Fall moment at the crane weight, the high pressure oil impact of big flow is shunted to moment, and after the short period, trimmer valve becomes closed condition, does not influence the handling of crane; After the crane weight hovers or lands; The oil pressure of filler opening and oil outlet is near consistent, and under the effect of spring, the pressure oil between guiding valve and the top cover in the oil pocket is discharged from; Trimmer valve is opened again; Because the one-way valve effect in the inner core can be accelerated oil extraction speed through conduction hole, shorten the Recovery time of trimmer valve; Use can also connect an one-way valve at the b mouth when the hydraulic system of crane, pressure oil makes oil hydraulic motor obtain bigger oil pressure through the trimmer valve shunting when stoping the crane lifting, and enough moments of torsion are provided.
Description of drawings
Fig. 1 is the structural drawing (state of a mouth and the equal low pressure of b mouth) of the utility model
Fig. 2 is the structural drawing (state of a mouth high pressure, b mouth low pressure) of the utility model
Fig. 3 is the structural drawing (state of b mouth high pressure, a mouth low pressure) of the utility model
Fig. 4 is that the utility model is applied in the schematic diagram in the crane system.
Embodiment
Embodiment to the utility model further describes below in conjunction with accompanying drawing.
Like Fig. 1, shown in Figure 2, a kind of trimmer valve is made up of housing 1, top cover 10 and the guiding valve 2, valve seat 3, spring 4 and the inner core 6 that are installed in the housing, and filler opening a mouth is arranged on the sidewall of housing 1, and oil outlet b mouth is arranged at the bottom.One annular groove 11 is arranged in the housing, and annular groove and a mouth are communicated with.
In the valve seat orifice in the housing 1 valve seat 3 is installed, valve seat can slide up and down in valve seat orifice.There is a sliding valve hole 32 that has ladder at the center of valve seat 3, and four pod apertures 31 are arranged on the sidewall, respectively with housing on annular groove 11 be communicated with sliding valve hole 32.
The top of inner core 6 is equipped with back-up ring 8, and the steel ball 5 of in funnel hole, packing into is packed inner core in the guiding valve 2 into, and back-up ring 8 blocks the locating slot in the guiding valve 2, and inner core is fixedly connected with guiding valve.
Guiding valve 2 stage casings have four pod apertures 22, and pod apertures 22 is through the gap between guiding valve and the inner core, and the damping hole 62 on while and the inner core, conduction hole 63 are communicated with; The bottom of guiding valve has 4 wedged holes 21; Wedged hole is triangular in shape, and is up-small and down-big, pod apertures 31 correspondences on position and the valve seat.
On guiding valve 2, overlap Upper gasket 7 and spring 4 successively, in the housing 1 that installs valve seat 3 of packing into, have an end of wedged hole 21 to stretch in the sliding valve hole 32 of valve seat on the guiding valve.Because wedged hole 21 is different with highly, cross-section area is different, therefore, increases the thickness of pad 7 and reduces the guiding valve height, can change the maximum pump discharge of trimmer valve.
After installing guiding valve 2, top cover 10 puts seal ring and housing 1 drive fit.In the adjustment hole of regulating on the bolt 91 screw-in top covers 10, regulate bolt 91 and can stretch out adjustment hole, withstand the end face of inner core 6.It is low more to regulate bolt 91 positions, and the speed that trimmer valve cuts out is fast more.Above regulating bolt, increase a sealing plug 92, played the effect that bolt 91 is regulated in protection.
Fig. 4 is applied in the schematic diagram in the crane system for the utility model.Motor 103 is connected with oil pump 101 through axle sleeve 102, and the oil pump outlet is connected to an one-way valve 104 and a four-hole selector valve 105, gets into the oil transportation road.Oil hydraulic motor 111 connects the strand arm 112 of crane; Pressure adjusting group that constitutes by one-way valve 110 and normally closed equilibrium valve 109 of series connection before oil hydraulic motor 111, the oil hydraulic motor that makes crane is when counter-rotating, when promptly crane falls; Keep enough oil pressure in the oil circuit, prevent that crane is out of control.The Buffer Unit that is parallel with bidirectional relief valve 108 on the oil circuit and forms by trimmer valve 106 series connection one one-way valve 107.Pressure release is carried out in safety valve 108 conducting when oil pressure is excessive, prevents destruction equipment.
Behind one-way valve 107 of trimmer valve 106 series connection and oil hydraulic motor 111 parallel connections.
When crane lifted by crane, because the effect of one-way valve 106, high pressure oil acted directly on the oil hydraulic motor without trimmer valve, to provide oil hydraulic motor maximum moment of torsion.
When crane when floating state falls, the oil hydraulic motor counter-rotating produces oil shock, this moment, trimmer valve was in open mode, the oil of a part has reduced the impact to oil hydraulic motor and oil circuit through the trimmer valve shunting.As shown in Figure 1, pressure oil gets into trimmer valve from a mouth, this moment a mouth high pressure, b mouth low pressure, a part of high pressure oil is directly discharged from the b mouth through wedged hole 21, sliding valve hole 32, a part of high pressure oil along spring 4 upwards gets into the pod apertures 22 of guiding valve.After shunting, a part is full of conduction hole 63 and funnel hole rapidly, with steel ball 5 jack-up upwards, blocks funnel hole.Another part high pressure oil slowly gets in the through hole 61 along damping hole 62, because the through hole below is blocked by steel ball 5, high pressure oil upwards gets into the oil pocket C between top cover 10 and the guiding valve 2.Along with high pressure oil constantly gets into, the oil pressure in the oil pocket C is increasing, and behind the elastic force of oil pressure greater than spring 4, guiding valve 2 descends with inner core 6 together, because the wedged hole 21 on the guiding valve is up-small and down-big, a mouth is progressively shut to the oil circuit between the b mouth.
Through after a while, after trimmer valve 106 is fully closed, the variation of oil pressure will act directly on the oil hydraulic motor 111 in the oil circuit, make the oil hydraulic motor rotating speed accurately controlled by oil pressure, and start-stop is accurate.
After the weight on the crane landed, the pressure in the in-line was low pressure, and as shown in Figure 2, a mouth and b mouth all are low pressure.Because a mouth oil pressure descends, the oil pressure in oil pocket C and the through hole 61 is owing to damping hole 62 effects, and pressure is greater than the oil pressure of a mouth; Because the lower end of funnel hole is consistent through conduction hole 63 and a mouth oil pressure, less than the oil pressure in the through hole 61, so steel ball 5 is washed open; Oil in the oil pocket C is discharged from through hole 61 rapidly, and the oil pocket internal pressure descends, behind the elastic force less than spring 4; Guiding valve 2 rises, and a mouth and b mouth are communicated with through wedged hole 21 again.
Can know that by said structure trimmer valve can be protected oil hydraulic motor and oil circuit effectively, reduce the influence of moment impact, in the process that crane descends and rises, close trimmer valve automatically, not influence the handling of oil hydraulic motor system.Through the pad 7 and adjusting bolt 91 of changing different-thickness, can adjust trimmer valve discharge capacity and buffering time.
The one-way valve 107 if the b mouth of trimmer valve 106 is not connected is when using separately, when the b mouth receives high pressure; When a mouth was in low pressure, high pressure oil directly impacted the bottom surface of guiding valve 2 and valve seat 3, and b mouth oil pressure is greater than the elastic force of spring 4; Spool integral body moves upward, and the oil in the oil pocket C is discharged from through hole 61 rapidly, the high pressure oil of b mouth through the annular groove 11 in the housing 1 fast to a mouth earial drainage; The flow of this moment is greater than the flow of state shown in Figure 1, and trimmer valve 106 can play the function of one-way valve, pressure release rapidly; The pressure difference of balance a, b mouth can be protected oil circuit, reduces the damage that oil shock causes system.
When the high pressure end of b mouth, after the recovery low pressure, under the thrust of spring 4, valve seat 3 moves downward, and returns to the state of Fig. 1, and the b mouth communicates through wedged hole 21 and a mouth.
Claims (6)
1. trimmer valve is made up of housing (1), top cover (10) and the spool that is installed in the housing, and filler opening a mouth and oil outlet b mouth are arranged on the housing (1); Annular groove (11) in a mouth and the housing communicates, and it is characterized in that said spool comprises guiding valve (2), valve seat (3), spring (4) and inner core (6); Valve seat (3) is slidingly connected with housing (1); Have pod apertures (31) and annular groove (11) to communicate on the sidewall of valve seat, valve seat has sliding valve hole (32) in the middle of the bottom, and the b mouth on sliding valve hole and the housing communicates; Guiding valve (2) is installed in the valve seat, is with spring (4) on the guiding valve, and stretch in the sliding valve hole (32), an end of spring (4) withstands on the step in the valve seat; Inner core (6) embeds guiding valve inside and is fixedly connected with guiding valve; The inner core center is a through hole (61); Have a damping hole (62) and through hole to communicate on the sidewall of inner core, via bottoms is an one-way valve, and one-way valve communicates through the pod apertures (22) at conduction hole (63) and guiding valve sidewall middle part.
2. trimmer valve according to claim 1 is characterized in that the lower end of said guiding valve (2) has a plurality of wedged holes (21), and the quantity of wedged hole is identical with pod apertures (31) quantity on the valve seat sidewall.
3. trimmer valve according to claim 1 is characterized in that there is adjustment hole at said top cover (10) center, regulates bolt (91) and screws in the adjustment hole, when the trimmer valve complete opening, regulates the bottom surface of bolt (91) and withstands the end face of inner core (6).
4. according to claim 1 or the described trimmer valve of claim 3, it is characterized in that said adjusting bolt (91) top is equipped with a sealing plug (92).
5. trimmer valve according to claim 1 is characterized in that said damping hole (62), is a tubaeform through hole, and end that the aperture is bigger and the pod apertures (22) on the guiding valve communicate, and the inner through hole (61) of end that the aperture is less and inner core communicates.
6. trimmer valve according to claim 1 is characterized in that being with on the said inner core (6) back-up ring (8), and back-up ring (8) embeds guiding valve (2) inside, and inner core is fixedly connected with guiding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202327984U CN202158025U (en) | 2011-07-01 | 2011-07-01 | Cushion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202327984U CN202158025U (en) | 2011-07-01 | 2011-07-01 | Cushion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202158025U true CN202158025U (en) | 2012-03-07 |
Family
ID=45765665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202327984U Withdrawn - After Issue CN202158025U (en) | 2011-07-01 | 2011-07-01 | Cushion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202158025U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200148A (en) * | 2011-07-01 | 2011-09-28 | 宁波市恒通液压科技有限公司 | Buffer valve |
| CN107013524A (en) * | 2017-05-31 | 2017-08-04 | 江苏柳工机械有限公司 | Loading machine movable arm cylinder trimmer valve and its steerable system |
| CN109826840A (en) * | 2019-04-02 | 2019-05-31 | 江苏汇智高端工程机械创新中心有限公司 | A kind of dynamic power shift gear box pressure buffer valve |
| CN112392790A (en) * | 2020-11-16 | 2021-02-23 | 邵玉强 | Leakage-free hydraulic reversing valve |
-
2011
- 2011-07-01 CN CN2011202327984U patent/CN202158025U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200148A (en) * | 2011-07-01 | 2011-09-28 | 宁波市恒通液压科技有限公司 | Buffer valve |
| CN102200148B (en) * | 2011-07-01 | 2013-07-31 | 宁波市恒通液压科技有限公司 | Buffer valve |
| CN107013524A (en) * | 2017-05-31 | 2017-08-04 | 江苏柳工机械有限公司 | Loading machine movable arm cylinder trimmer valve and its steerable system |
| CN109826840A (en) * | 2019-04-02 | 2019-05-31 | 江苏汇智高端工程机械创新中心有限公司 | A kind of dynamic power shift gear box pressure buffer valve |
| CN112392790A (en) * | 2020-11-16 | 2021-02-23 | 邵玉强 | Leakage-free hydraulic reversing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120307 Effective date of abandoning: 20130731 |
|
| RGAV | Abandon patent right to avoid regrant |