CN202867371U - Cushion valve - Google Patents

Cushion valve Download PDF

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Publication number
CN202867371U
CN202867371U CN 201220408795 CN201220408795U CN202867371U CN 202867371 U CN202867371 U CN 202867371U CN 201220408795 CN201220408795 CN 201220408795 CN 201220408795 U CN201220408795 U CN 201220408795U CN 202867371 U CN202867371 U CN 202867371U
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China
Prior art keywords
valve
oil
way
throttle valve
way throttle
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CN 201220408795
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Chinese (zh)
Inventor
贾靖
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LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd
Guangxi Liugong Machinery Co Ltd
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LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd
Guangxi Liugong Machinery Co Ltd
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Application filed by LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd, Guangxi Liugong Machinery Co Ltd filed Critical LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd
Priority to CN 201220408795 priority Critical patent/CN202867371U/en
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Abstract

The utility model relates to a cushion valve. The cushion valve aims at overcoming the defects that a start motion and preheating of an existing cushion valve are slow. Provided is the cushion valve. The cushion valve comprises a valve body. An oil changing oil channel and two groups of cushion oil channels are arranged in the valve body. Each group of the cushion oil channels comprises a first one-way throttle valve, a second one-way throttle valve and a three-position tee joint reversing valve. A left control oil port and a right control oil port of each three-position tee joint reversing valve are respectively communicated with an oil inlet end pipeline of each first one-way throttle valve and an oil inlet end pipeline of each second one-way throttle valve. Each left oil inlet and each right oil inlet are communicated with an oil outlet end pipeline of each first one-way throttle valve and an oil outlet end pipeline of each second one-way throttle valve. The oil changing oil channel comprises four one-way valves. Oil outlets of the four one-way valves are communicated in a one-to-one correspondence mode with each of the oil outlet end pipelines of each of the first one-way throttle valves and each of the oil outlet end pipelines of each of the second one-way throttle valves in the two groups of the cushion oil channels. After each of the oil inlets are mutually communicated, each of the oil inlets is communicated with oil changing oil inlets in the surface of the valve body. According to the cushion valve, the functions that impact generated when a motion of a hydraulic operating device stops can be prevented, the slow start motion is eliminated, and speed of preheating of guide hydraulic oil is accelerated are achieved.

Description

Trimmer valve
Technical field
The utility model relates to a kind of trimmer valve, relates in particular to a kind of for having the trimmer valve of buffering and the function of changing oil on the pilot control hydraulic circuit.
Background technique
For hydraulically powered equipment, usually be all to drive the control multi-way valve by the guide, action by multi-way valve realizes the control of hydraulic work device action, in order to reduce when multi-way valve is closed the hydraulic shock produced, thereby access trimmer valve on guide's oil circuit control, slow down the reset speed of multi-way valve, reduce and impact.Existing trimmer valve as shown in Figure 1, is provided with the first one-way throttle valve 10, the second one-way throttle valves 20 in valve body 9, and first, second one-way throttle valve accesses respectively the left and right pipeline in the pilot control oil circuit.Its principle of buffer function that realizes the guide oil road is as follows: when the guide controls, have action to make hydraulic oil flow into and flow to the first one-way throttle valve oil outlet 12 through the first one-way throttle valve 10 and enter the left chamber of selector valve pilot control multi-way valve from trimmer valve the first one-way throttle valve filler opening 11, the right chamber of the pilot control of selector valve hydraulic oil through the second one-way throttle valve oil outlet 22 flow into through the second one-way throttle valve 2 flow to the second one-way throttle valve filler opening 21, pilot-actuated valve enters the fuel tank loop.Thereby realize that the spool that promotes selector valve moves and makes selector valve move; When the guide stops moving, the spool of multi-way valve returns meta, and the hydraulic oil in the left chamber of the pilot control of selector valve, through the first one-way throttle valve of this side, enters fuel tank.The hydraulic oil in the right chamber of pilot control of multi-way valve is supplemented by the second one-way throttle valve 2 .when the pilot valve counteragent, hydraulic oil flows to oppositely.Due to the throttling action that one-way throttle valve is arranged, can slow down the reset speed of multi-way valve spool, thereby the impact that stops action being reduced.
Use guide's hydraulic circuit of sort buffer structure usually also to have such problem, although hydraulic oil can arrive the pilot control chamber of a side of selector valve fast through one-way throttle valve, but the hydraulic oil in the pilot control chamber of selector valve opposite side must flow to hydraulic oil container by the one-way throttle valve of this side, the one-way throttle valve of this side can reduce the speed of the outflow of hydraulic oil, also just affect the toggle speed of selector valve, made the machine startup slow movement.The another kind of shortcoming of this structure is when the cold snap operation, while after machine startup, the hydraulic system of machine being carried out to preheating, due to the oil circuit of the pipeline between pilot valve and multi-way valve for sealing, the hydraulic oil of this part is difficult in the hydraulic system with machine hydraulic oil and circulate and exchange and obtain preheating, thereby affects the pre-thermal efficiency of machine to hydraulic system.
The model utility content
The technical problems to be solved in the utility model is the shortcoming for the trimmer valve used on existing pilot control hydraulic circuit, and a kind of buffering that has is provided, and eliminates and starts slow, as to accelerate the pre-thermal efficiency of hydraulic oil in pilot control hydraulic circuit trimmer valve.
Technical solution adopted in the utility model is a kind of trimmer valve of structure, comprise valve body, be provided with two groups of buffering oil circuits in valve body, every group of buffering oil circuit comprises the first one-way throttle valve and the second one-way throttle valve, the first one-way throttle valve and the second one-way throttle valve all have filler opening and oil outlet separately in valve body surface, also comprise the oil circuit of changing oil in valve body, every group of buffering oil circuit also comprises a three position three-way change valve, the left control port of three position three-way change valve and the oil inlet end pipeline connection of the first one-way throttle valve, the right control port of three position three-way change valve and the oil inlet end pipeline connection of the second one-way throttle valve, the oil outlet end pipeline connection of the left oil inleting port of three position three-way change valve and the first one-way throttle valve, the right filler opening of three position three-way change valve and the oil outlet end pipeline connection of the second one-way throttle valve, the fuel-displaced pipeline that is provided with three position three-way change valve in valve body is communicated with the 3-position-3-way oil outlet of valve body surface, the oil circuit of changing oil comprises four one-way valves, in the oil outlet of four one-way valves and two groups buffering oil circuit first, the oil outlet end pipeline of the second one-way throttle valve is communicated with one to one, after being interconnected, the filler opening of four one-way valves is communicated with the filler opening of changing oil in valve body surface, the filler opening of changing oil connects the hydraulic fluid pressure oil sources.When the trimmer valve in the utility model is used for the pilot control hydraulic system, two groups of buffering oil circuits access respectively a road pilot control oil circuit, the filler opening of first, second one-way throttle valve in each group buffering oil circuit is communicated with 1 mouthful and 2 mouthfuls of pilot-actuated valve respectively, and the oil outlet of first, second one-way throttle valve in each group buffering oil circuit is communicated with the two ends control oil pocket of selector valve in multi-way valve respectively.The fuel tank circuit communication of the oil outlet of three position three-way change valve and hydraulic system.The spool that the controlling rod of operated pilot control valve makes hydraulic oil can arrive the left control oil pocket of the selector valve multi-way valve and promote selector valve through the first one-way throttle valve from its 1 mouthful of outflow moves, also make right filler opening and the oil outlet conducting of three position three-way change valve simultaneously, the hydraulic oil of the right control oil pocket of selector valve enters the fuel tank loop and, without the throttle orifice in the second one-way throttle valve, therefore can start fast through right oil-feed, the oil outlet of three position three-way change valve.When shut-down operation, the spool of three position three-way change valve returns meta and closes, change-over valve core in multi-way valve returns meta promotion hydraulic oil and flows to pilot-actuated valve through one-way throttle valve, due to needs process one-way throttle valve, can slow down the reset speed of the change-over valve core in multi-way valve, thereby play the effect of buffering protecting against shock.When machine during in the cold region operation, first carry out heat engine before the action of machine startup rear working device, improve the temperature of hydraulic oil in hydraulic system, the hydraulic oil be preheated enters through the filler opening of changing oil, flow through the throttle orifice of first, second one-way throttle valve, 1 mouthful and the 2 mouthfuls of mouths of the T from pilot-actuated valve inflow fuel tank loops of pilot-actuated valve, make just can be to pilot-actuated valve and selector valve before pilot-actuated valve has action between the hydraulic oil of oil circuit replaced preheating, the pre-thermal efficiency of raising hydraulic oil.
In the utility model, after being interconnected, the fuel-displaced pipeline of the three position three-way change valve of two groups of bufferings in oil circuit is communicated with the 3-position-3-way oil outlet of valve body surface.Can simplify the oil circuit of guide's hydraulic control system like this.
In the utility model, the filler opening of changing oil is provided with decompressing or throttling device, and the filler opening of changing oil like this can directly be connected with the high pressure fuel source of hydraulic system the pressure oil-source that obtains preheating by decompressing or throttling device.
In the utility model, decompressing or throttling device comprises that two ends are provided with externally threaded pipe joint body, in the pipe joint body, establishes pod apertures, is provided with the throttling chamber in the oil inlet end of pod apertures, and throttling is provided with throttle valve in chamber.Can also be provided with filter screen in the throttling chamber, filter screen is fixed on the oily direction side of throttle valve.Filter screen can prevent that the foreign material in hydraulic oil from entering into the pilot control oil circuit by the oil circuit of changing oil.Also be provided with detachable plug in the throttling chamber, the throttling cavity wall is provided with internal thread, and the plug outer wall is established outside thread, and plug for being threaded, is provided with the perforation that is communicated with its both sides with pipe joint in plug, and filter screen is fixed between throttle valve and plug.The bore a hole cross section of outer side of plug is polygonal.Throttle valve be provided with the groove that holds filter screen between plug contacts, filter screen is arranged in groove.Or groove can be arranged on the end face of the contiguous throttle valve of plug and be arranged on throttle valve near on the end face of plug.Pod apertures is stepped, and its enlarged diameter section is the throttling chamber.
The beneficial effect that the utility model compared with prior art has is: in this trimmer valve access pilot control oil circuit, have the function of shock absorbing when the operation that stops pilot-actuated valve, can eliminate the slow effect of startup during start-up operation simultaneously, can shorten the preheat time of hydraulic oil in the pilot control oil circuit during heat engine before the cold zone operation, improve the pre-thermal efficiency.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing trimmer valve;
Fig. 2 is the sectional drawing of trimmer valve at place, first group of buffering oil circuit position;
Fig. 3 is the sectional drawing of trimmer valve at place, second group of buffering oil circuit position;
Fig. 4 is that trimmer valve is at the sectional drawing at place, oil circuit position of changing oil;
Fig. 5 is the structural representation of trimmer valve decompressing or throttling device.
Reference character:
Valve body 9, the first one-way throttle valve 10, the first one-way throttle valve filler opening 11, the first one-way throttle valve oil outlet 12, the second one-way throttle valve 20, the second one-way throttle valve filler opening 21, the second one-way throttle valve oil outlet 22, three position three-way change valve 30, three position three-way change valve oil outlet 31, second group of first one-way throttle valve 10b, second group of first one-way throttle valve filler opening 11b, second group of first one-way throttle valve oil outlet 12b, second group of second one-way throttle valve 20b, second group of second one-way throttle valve filler opening 21b, second group of second one-way throttle valve oil outlet 22b, second group of three position three-way change valve 30b, the first one-way valve 81, the second one-way valve 82, the 3rd one-way valve 83, the 4th one-way valve 84, pipe joint body 85, throttle valve 86, filter screen 87, plug 88.
Embodiment
Below in conjunction with accompanying drawing explanation specific embodiments.
Trimmer valve in the present embodiment has two groups of buffering oil circuits, wherein first group of buffering oil circuit as shown in Figure 2, comprise the first one-way throttle valve 10 and the second one-way throttle valve 20 at first group of buffering oil circuit, three position three-way change valve 30, the first one-way throttle valve 10 has the first one-way throttle valve filler opening 11 and the first one-way throttle valve oil outlet 12 on valve body 9 surfaces, the second one-way throttle valve 20 has the second one-way throttle valve filler opening 21 and the second one-way throttle valve oil outlet 22 on valve body 9 surfaces, the oil inlet end pipeline connection of the left control port of three position three-way change valve 30 and the first one-way throttle valve 10, the oil inlet end pipeline connection of the right control port of three position three-way change valve 30 and the second one-way throttle valve 20, the oil outlet end pipeline connection of the left oil inleting port C of three position three-way change valve 30 and the first one-way throttle valve 10, the right filler opening d of three position three-way change valve 30 and the oil outlet end pipeline connection of the second one-way throttle valve 20, the fuel-displaced pipeline f of three position three-way change valve 30 is communicated with the 3-position-3-way oil outlet 31 that is positioned at valve body 9 surfaces.Second group of buffering oil circuit as shown in Figure 3, second group of buffering oil circuit has and first group of structure that the buffering oil circuit is identical, it comprises second group of first one-way throttle valve 10b and the second one-way throttle valve 20b, second group of three position three-way change valve 30b, second group of first one-way throttle valve 10b has second group of first one-way throttle valve filler opening 11b and second group of first one-way throttle valve oil outlet 12b on valve body 9 surfaces, second group of second one-way throttle valve 20b has second group of second one-way throttle valve filler opening 21b and second group of second one-way throttle valve oil outlet 22b on valve body 9 surfaces, the left control port of second group of three position three-way change valve 30b and the oil inlet end pipeline connection of second group of first one-way throttle valve, the right control port of second group of three position three-way change valve and the oil inlet end pipeline connection of second group of second one-way throttle valve, the left oil inleting port a of second group of three position three-way change valve and the oil outlet end pipeline connection of second group of first one-way throttle valve, the right filler opening b of second group of three position three-way change valve and the oil outlet end pipeline connection of second group of second one-way throttle valve, the fuel-displaced pipeline e of second group of three position three-way change valve is communicated with first group of fuel-displaced pipeline f that cushions the three position three-way change valve in oil circuit with the pipeline by valve body.Be provided with the oil circuit of changing oil in valve body 9, as shown in Figure 4, the oil circuit of changing oil comprises four one-way valves 81,82,83,84, these four one-way valve oil outlets are communicated with one to one with the oil outlet end pipeline that first, second group cushions first, second one-way throttle valve in oil circuit, the filler opening of these four one-way valves is interconnected, and with one have the decompression throttling with the pipe joint of filtering function, be connected.As shown in Figure 5, this pipe joint comprises pipe joint body 85, its two ends are provided with outside thread, one end is threaded with valve body 9, the other end is for connecting outside oil feed line, establish stair-stepping pod apertures in pipe joint body 85, the enlarged diameter section of pod apertures is the throttling chamber, is disposed with plug 88, filter screen 87, throttle valve 86 in the throttling chamber from the oil inlet end of pipe joint body.The throttling cavity wall is provided with internal thread, and plug 88 outer walls are established outside thread, and plug 88 is threaded with outside thread by the internal thread cooperatively interacted with pipe joint body 85, and throttle valve 86 is fixed in the throttling chamber.Close at plug 88 on the end face of throttle valve 86 and be provided with the groove that holds filter screen 87, filter screen 87 is contained in groove, perforation is set plug 88 is interior this perforation so that hydraulic oil can be flowed through, filter 87, throttle valve 86 and be communicated with oil-feed and the fuel-displaced two ends of throttle pipe joint.The cross section of perforation outboard end is regular hexagon, is rendered as inner hexagonal hole, in order to can facilitate installation and removal by tool using.
When this trimmer valve formerly uses in the drain pressure control system, wherein the first one-way throttle valve filler opening 11, the second one-way throttle valve filler opening 21 of first group connect respectively 1 mouthful and 2 mouthfuls of pilot-actuated valve in this road pilot control oil circuit, and oil pocket is controlled in the selector valve both sides that the first one-way throttle valve oil outlet 12,22 of the second one-way throttle valve oil outlets are communicated with respectively in the multi-way valve that this pilot control oil circuit controls.Second group of buffering oil circuit is connected an other road pilot control oil circuit with same Placement.The filler opening of changing oil for example is communicated with the fuel-displaced pipeline of guide's oil pump or is communicated with the hydraulic circuit of machinery equipment equipment with pressure oil-source by pipeline.31 of the oil outlets of three position three-way change valve and fuel tank circuit communication.

Claims (10)

1. a trimmer valve, comprise valve body, be provided with two groups of buffering oil circuits in valve body, every group of buffering oil circuit comprises the first one-way throttle valve and the second one-way throttle valve, described the first one-way throttle valve and the second one-way throttle valve all have filler opening and oil outlet separately in valve body surface, it is characterized in that also comprising the oil circuit of changing oil in valve body, every group of buffering oil circuit also comprises a three position three-way change valve, the left control port of described three position three-way change valve and the oil inlet end pipeline connection of the first one-way throttle valve, the right control port of three position three-way change valve and the oil inlet end pipeline connection of the second one-way throttle valve, the oil outlet end pipeline connection of the left oil inleting port of three position three-way change valve and the first one-way throttle valve, the right filler opening of three position three-way change valve and the oil outlet end pipeline connection of the second one-way throttle valve, the fuel-displaced pipeline that is provided with three position three-way change valve in valve body is communicated with the 3-position-3-way oil outlet of valve body surface, the described oil circuit of changing oil comprises four one-way valves, in the oil outlet of described four one-way valves and two groups buffering oil circuit first, the oil outlet end pipeline of the second one-way throttle valve is communicated with one to one, after being interconnected, the filler opening of described four one-way valves is communicated with the filler opening of changing oil in valve body surface.
2. trimmer valve according to claim 1, be communicated with a 3-position-3-way oil outlet of valve body surface after the fuel-displaced pipeline that it is characterized in that the three position three-way change valve in described two groups of buffering oil circuits is interconnected.
3. trimmer valve according to claim 1 and 2, is characterized in that the described filler opening of changing oil is provided with decompressing or throttling device.
4. trimmer valve according to claim 3, is characterized in that described decompressing or throttling device comprises that two ends are provided with externally threaded pipe joint body, in the pipe joint body, establishes pod apertures, is provided with the throttling chamber in the oil inlet end of pod apertures, and throttling is provided with throttle valve in chamber.
5. trimmer valve according to claim 4, is characterized in that being provided with filter screen in the throttling chamber, and described filter screen is fixed on the oily direction side of throttle valve.
6. trimmer valve according to claim 5, it is characterized in that also being provided with detachable plug in the throttling chamber, described throttling cavity wall is provided with internal thread, described plug outer wall is established outside thread, described plug with pipe joint for being threaded, be provided with the perforation that is communicated with its both sides in described plug, described filter screen is fixed between throttle valve and plug.
7. trimmer valve according to claim 6, is characterized in that the bore a hole cross section of outer side of described plug is polygonal.
8. according to the described trimmer valve of claim 6 or 7, it is characterized in that throttle valve be provided with the groove that holds filter screen between plug contacts, described filter screen is arranged in groove.
9. trimmer valve according to claim 8, is characterized in that described groove is arranged on the end face of the contiguous throttle valve of plug.
10. trimmer valve according to claim 4, is characterized in that described pod apertures is stepped, and its enlarged diameter section is the throttling chamber.
CN 201220408795 2012-08-17 2012-08-17 Cushion valve Active CN202867371U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220408795 CN202867371U (en) 2012-08-17 2012-08-17 Cushion valve

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Application Number Priority Date Filing Date Title
CN 201220408795 CN202867371U (en) 2012-08-17 2012-08-17 Cushion valve

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697011A (en) * 2013-12-24 2014-04-02 江阴机械制造有限公司 Cushion valve for pipe bending machine
CN106050778A (en) * 2016-07-11 2016-10-26 润琛液压机械南通有限公司 Manifold valve block for static pile pressing machine
CN106870499A (en) * 2017-04-28 2017-06-20 太原科技大学 A kind of damping buffering valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697011A (en) * 2013-12-24 2014-04-02 江阴机械制造有限公司 Cushion valve for pipe bending machine
CN103697011B (en) * 2013-12-24 2015-09-09 江阴机械制造有限公司 Tube bender trimmer valve
CN106050778A (en) * 2016-07-11 2016-10-26 润琛液压机械南通有限公司 Manifold valve block for static pile pressing machine
CN106870499A (en) * 2017-04-28 2017-06-20 太原科技大学 A kind of damping buffering valve

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