CN205533498U - Hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof - Google Patents
Hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof Download PDFInfo
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- CN205533498U CN205533498U CN201620085583.7U CN201620085583U CN205533498U CN 205533498 U CN205533498 U CN 205533498U CN 201620085583 U CN201620085583 U CN 201620085583U CN 205533498 U CN205533498 U CN 205533498U
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Abstract
The utility model discloses a hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof, one of them control chamber of flat valve then is used for communicateing guide control circuit as case oil feed chamber, another control chamber, intercommunication stroke Z1 between the case oil return chamber is greater than the wall stroke Z2 between case oil feed chamber and the case oil return chamber, join in marriage class control system and will control actuating mechanism's the hydraulic cylinder and oil feed chamber, oil return chamber and the guide control circuit intercommunication of flat valve, form the stroke position feedback control system of a hydraulic cylinder piston and flat valve case. The utility model discloses a control valve compact structure, succinct, case, valve body handling ease, case light in weight can improve overall efficiency. Furthermore, the utility model discloses a processing, assembly precision can obtain guaranteeing to the case removes smoothly, has overcome especially because the untimely hydraulic shock that causes of position sigual feedback responds in time, and sensitivity is high, plays the effect of protection organism, and can absorb the return stroke energy, provides the peak value flow, has improved energy utilization.
Description
Technical field
The utility model relates to rock drill field, a kind of hydraulic gate flat valve and the flow control system of application thereof, it is possible to achieve the travel position FEEDBACK CONTROL of piston and flat valve and motion match.
Background technology
Hydraulic gate is widely used in the broken rock and soil fields such as mine, water power, tunnel traffic, and hydraulic impact mechanism is the critical component of hydraulic gate, including piston, flat valve, accumulator and the duct connecting them.Whole motion process is: flat valve promotes spool to commutate under the effect of telltale hole pressure oil, it is achieved the switching of oil circuit, piston then makees well-regulated stroke, drawback movement with fuel supply rate curve.So, flat valve is the important component part of hydraulic impact mechanism.From the point of view of having valve-type hydraulic gate both at home and abroad at present, a lot of for its kind of flat valve of flow direction control or flow-control, mainly have column valve, cylinder valve and sleeving valve, set valve-type and core valve-type can be divided into by the structure of valve, divide by maneuverability pattern have electronic, surge and the electro-hydraulic various ways such as dynamic.
There is following defect in the flat valve of prior art:
The structure of column valve and cylinder valve is complicated, and weight is big, and machining accuracy, smoothness requirements are high, and difficulty of processing is big, and oil circuit is more complicated；Sleeving valve only one of which valve pocket, is enclosed within piston and joins oil with piston as moved in coaxial, bigger by piston restriction, and size is relatively big, and oil consumption is many, and leakage loss is big, and the difficulty of processing of cylinder body is relatively big, such as the H series of Montabert company, the HD series of Furukawa；Traditional core valve core and valve body cooperate, machining accuracy it is difficult to ensure that, it is difficult to ensure that less required by assembling and uniform gap, if the leakage rate that excesssive gap is easily caused between internal chamber increases, affect the service behaviour of flat valve, if gap is too small, easily make spool hair fastener, causing commutating abnormal, and spool is easily affected by the impurity in hydraulic oil and causes clamping stagnation, stain resistance is poor.Additionally, some maneuverability pattern at present, due to flat valve feedback not in time, easily cause the biggest hydraulic shock, response speed is the most delayed.
Utility model content
The utility model solves the technical problem that and is: provide a kind of hydraulic gate flat valve that can overcome defect existing for above-mentioned prior art and the flow control system of application thereof.
The technical solution of the utility model includes a kind of hydraulic gate flat valve, including left end cap, valve body, spool, right end cap, described spool left part, valve body and left end cap complement each other to form spool left control chamber, described spool right part, valve body and right end cap complement each other to form spool right control chamber, one of them controls chamber as spool oil suction chamber, another controls chamber and is then used for connecting pilot control oil circuit, and the stage casing of described valve body and spool forms two spool oil back chambers；
During spool moves in valve body, connection stroke (Z1) between described spool oil back chamber is more than the partition stroke (Z2) between spool oil suction chamber and spool oil back chamber, described connection stroke (Z1) refers to remain the segment distance being interconnected between spool oil back chamber, and described partition stroke (Z2) refers to that spool oil suction chamber remains a segment distance of mutually partition with adjacent spool oil back chamber.
Further, one section of all-pass stroke is had between described spool oil suction chamber and all of spool oil back chamber, described all-pass stroke refers to that keeping one end distance of all-pass state, described all-pass stroke between spool oil suction chamber and all spool oil back chambers is connection stroke Z1 and the range difference cutting off stroke Z2.
Further, described spool uses cylindrical valve spool, which is provided with the annular boss for separating each oil pocket.
The technical solution of the utility model also includes a kind of rock drill flow control system applying above-mentioned flat valve, including hydraulic jack and above-mentioned flat valve, the piston nose of described hydraulic jack, cylinder body and front sealing shroud complement each other to form piston ante-chamber, piston stage casing arranges groove, and complementing each other to form piston oil back chamber with cylinder body, piston rear end, cylinder body and rear sealing shroud complement each other to form piston back cavity；
The spool oil suction chamber of described flat valve is directly communicated with piston ante-chamber by oil duct, and two spool oil back chambers are communicated with piston oil back chamber, piston back cavity respectively by oil duct；
The pilot control oil circuit of described flat valve switches over connection by the feedback oil duct arranged in cylinder body between piston ante-chamber or piston oil back chamber, travel position according to piston is controlled, and forms a hydraulic cylinder piston and the travel position feedback control system of flat valve spool.
Further, described hydraulic jack is double-rod double acting hydraulic cylinder, is connected with the executing agency of rock drill.
Further, the piston nose of described hydraulic jack effective hydraulic action area is less than piston rear end effective hydraulic action area.
In the utility model, the spool oil-in of described flat valve is connected by the oil pump of pipeline with supply hydraulic gate pressure oil, and described spool oil return opening is connected with fuel tank by pipeline.
Further, the piston ante-chamber of described hydraulic jack is parallel with accumulator by oil duct.
A kind of hydraulic gate flat valve that the utility model provides, can solve spool in flat valve and coordinate with valve body face length, precision to be difficult to ensure that, processing, the problem of assembling inconvenience, and flat valve hydraulic fault can be repaired, and parts interchangeability is good, spool is difficult to hair fastener, and stain resistance is strong.
Using rock drill flat valve and the flow control system of application thereof of the utility model technique scheme, compared with prior art, the utility model has the advantage that
1, in flat valve of the present utility model, spool uses cylindrical spool to combine annular boss structure, with valve body coordinate face shorter, precision is easily guaranteed that, processing, easy to assembly, and spool is not easy hair fastener, and interchangeability is good, and bulk life time greatly extends；
2, in rock drill flow control system of the present utility model, flat valve spool and hydraulic cylinder piston form a travel position feedback control system, and the position of spool and piston is mutually controlled by position each other, and response is in time, highly sensitive；
3, the opening design of flat valve of the present utility model, it is possible to have the state that three of short duration chambeies are all linked up, it is possible to reduce system pressure peak value, body is had certain protective effect；
4, rock drill flow control system of the present utility model is arranged in parallel high pressure accumulator in piston nose, it is possible to absorb unnecessary energy during drawback movement and energy storage, and peak flow can be supplied when stroke movement, improve capacity usage ratio.
Control valve compact conformation of the present utility model, succinct, spool, valve body are easy to processing, and spool is lightweight, can improve overall efficiency.And; processing of the present utility model, assembly precision can be guaranteed; and spool moves smooth and easy; emphasis overcomes owing to position signalling feeds back the hydraulic shock caused not in time, and response is in time, highly sensitive; play the effect of protection body; and backhaul energy can be absorbed, it is provided that peak flow, improve capacity usage ratio.
Accompanying drawing explanation
Fig. 1 is the hydraulic gate flat valve sectional view in embodiment 1.
Fig. 2 is the hydraulic gate flow control system connection diagram in embodiment 2.
Label in figure: 1-left end cap, 2-valve body, 3-spool, 4-right end cap, 5-spool left control chamber, 6-the first spool oil back chamber, 7-the second spool oil back chamber, 8-spool right control chamber, 9-piston, sealing shroud after 10-, 11-piston back cavity, 12-piston oil back chamber, 13-high pressure accumulator, 14-piston ante-chamber, 15-cylinder body, sealing shroud before 16-.
Detailed description of the invention
It should be noted that in the case of not conflicting, the feature in embodiment in the utility model can be mutually combined.Below in conjunction with accompanying drawing and specific embodiment with the utility model is described in further detail.
Embodiment 1
See Fig. 1, it figure is rock drill flat valve, including left end cap 1, valve body 2, spool 3, right end cap 4, valve body 2, left end cap 1 and spool 3 complement each other to form spool left control chamber 5, valve body 2, right end cap 4 and spool 3 complement each other to form spool right control chamber 8, spool 3 uses cylindrical spool, which is provided with two annulus boss, valve body 2 and spool 3 complement each other to form the first spool oil back chamber 6, second spool oil back chamber 7, oil-in A and oil return opening B it is provided with in valve body 2, in the present embodiment, spool right control chamber 8 is spool oil suction chamber, spool left control chamber 5 connects the control signal oil circuit of spool, in other Application Examples, the position of oil suction chamber can be exchanged according to actual requirement.
In conjunction with seeing Fig. 2, cylinder body 15, piston 9 front end and front sealing shroud 16 complement each other to form piston ante-chamber 14, groove fit on cylinder body 15 and piston 9 body forms piston oil back chamber 12, cylinder body 15, piston 9 rear end and rear sealing shroud 10 complement each other to form piston back cavity 11, set feedback oil duct d in cylinder body 15.In the flow control system of rock drill, spool right control chamber 8 is directly communicated with piston ante-chamber 14 by oil duct a, first spool oil back chamber the 6, second spool oil back chamber 7 oil duct communicates with piston oil back chamber 12, piston back cavity 11 respectively, spool left control chamber 5 is communicated by the oil back chamber 12 of feedback oil duct d and the ante-chamber 14 of piston or piston, describes in detail in the concrete situation that communicates embodiment under connecing.Spool oil-in A is connected by the pump of pipeline with supply hydraulic gate pressure oil, and spool oil return opening B is connected with fuel tank by pipeline.
Embodiment 2
Referring specifically to Fig. 2, during piston rod backhaul, the pressure oil of supply hydraulic gate system enters spool right control chamber 8 from spool oil-in A by the road, now spool 3 is in left position, transfixion, from the structure in embodiment 1, piston ante-chamber 14 leads to hydraulic oil, piston oil back chamber 12, piston back cavity the 11, first spool oil back chamber 6 and the second spool oil back chamber 7 oil return, piston 9 backhaul under the effect of hydraulic coupling is accelerated.After backhaul control stroke Sc is passed by piston 9 backhaul acceleration, opening the feedback oil duct d of valve, pressure oil feeds back to spool left control chamber 5 from piston ante-chamber 14, and such spool 3, just under the effect of hydraulic coupling, makees to the right backhaul commutation.Oil circuit is not yet switched at spool 3, when i.e. the displacement of spool 3 is less than the Z2 shown in Fig. 2, piston back cavity 11 still communicates with the second spool oil back chamber 7, continue oil return, but the impact due to valve port throttling, the return pressure of piston back cavity 11 is gradually increased, and the hydraulic coupling suffered by piston 9 goes to zero, but still is to make to the right backhaul accelerated motion.
During spool 3 enters positive opening; due to the partition stroke Z2 between connection stroke Z1 ＞ the second spool oil back chamber and the spool right control chamber between the first spool oil back chamber shown in Fig. 1 and the second spool oil back chamber; piston ante-chamber 14, piston back cavity 11 are linked up with piston oil back chamber 12 3 chamber; this is time the shortest but the most special duty; piston 9 starts backhaul braking; now can reduce system pressure peak value; have certain protective effect to body, the distance of this LAP is Z2-Z1.Along with the continuation backhaul of spool 3 commutates, second spool oil back chamber 7 and spool right control chamber 8 are linked up, piston ante-chamber 14 and piston back cavity 11 all lead to pressure oil, form differential connection, effective active area A1 due to piston back cavity 11 is more than the effective active area A2 of piston ante-chamber 14, and piston 9 continues backhaul braking.When spool 3 completes backhaul commutation, it is in right position static.Piston 9 continues backhaul braking, until speed will be zero, ready for stroke, the distance of this process piston movement is the stroke Sp of piston.
Embodiment 3
Referring specifically to Fig. 2, after embodiment 2 completes, spool 3 is in right position, transfixion, piston ante-chamber 14 and the most differential connection of piston back cavity 11, but the effective active area A1 of piston back cavity 11 is more than front end more than the effective active area A2 of piston ante-chamber 14, the hydraulic coupling of piston rear end effect, piston 9 starts stroke and accelerates.When piston 9 covers Sp-Sic, open the feedback oil duct d of valve, piston oil back chamber 12 control left with spool chamber 5 communicates, spool 3 starts stroke commutation to the left under the effect of the oil-feed hydraulic coupling of oil-in A, piston 9 continues stroke and accelerates, here it is considered that and cover Sic at spool, and during completing impact with bit shank, the displacement of spool 3 is less than the half of its stroke.Piston 9 seizes up state after completing impact, and now spool 3 continues stroke commutation.Under normal circumstances, spool 3, in the state that piston 9 pauses, should complete stroke commutation so that piston back cavity 11 can unimpeded oil return.
Embodiment 4
In embodiment 2 and embodiment 3, high pressure accumulator 13 is communicated by oil duct a control right with spool chamber 8, piston ante-chamber 14, it is possible to absorbs unnecessary flow when backhaul and carries out energy storage, provides peak flow when stroke, improves capacity usage ratio.
These are only preferred embodiment of the present utility model, and limit the utility model never in any form, for a person skilled in the art, the utility model can have various change and modification.All within spirit of the present utility model and principle, any change of being made, equivalent, modification, improvement etc., within should be included in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (8)
1. a hydraulic gate flat valve, it is characterised in that: include left end cap, valve body, spool, right end cap,
Described spool left part, valve body and left end cap complement each other to form spool left control chamber, described spool right part,
Valve body and right end cap complement each other to form spool right control chamber, one of them control chamber as spool oil suction chamber,
Another controls chamber and is then used for connecting pilot control oil circuit, and the stage casing of described valve body and spool forms two spools and returns
Oil pocket；
During spool moves in valve body, the connection stroke (Z1) between described spool oil back chamber is more than
Partition stroke (Z2) between spool oil suction chamber and spool oil back chamber, described connection stroke (Z1) refers to spool
Remain between oil back chamber that the segment distance being interconnected, described partition stroke (Z2) refer to spool oil-feed
Chamber remains a segment distance of mutually partition with adjacent spool oil back chamber.
A kind of hydraulic gate flat valve, described spool oil suction chamber and all of spool
One section of all-pass stroke, described all-pass stroke is had to refer to spool oil suction chamber and all spool oil back chambers between oil back chamber
Between keep all-pass state one end distance, described all-pass stroke for connection stroke (Z1) and partition stroke (Z2)
Range difference.
A kind of hydraulic gate flat valve the most according to claim 1 or claim 2, described spool uses cylindrical valve spool,
Which is provided with the annular boss for separating each oil pocket.
4. a hydraulic gate flow control system, it is characterised in that: include hydraulic jack and claim 1-3
In flat valve, before the piston nose of described hydraulic jack, cylinder body and front sealing shroud complement each other to form piston
Chamber, piston stage casing arranges groove, and complements each other to form piston oil back chamber, piston rear end, cylinder body with cylinder body
Piston back cavity is complemented each other to form with rear sealing shroud；
The spool oil suction chamber of described flat valve is directly communicated with piston ante-chamber by oil duct, two spool oil back chambers
Communicated with piston oil back chamber, piston back cavity respectively by oil duct；
The feedback oil duct that the pilot control oil circuit of described flat valve is arranged in passing through cylinder body is at piston ante-chamber or piston
Switch over connection between oil back chamber, be controlled according to the travel position of piston, form a hydraulic jack
The travel position feedback control system of piston and flat valve spool.
The most according to claim 4, a kind of hydraulic gate flow control system, described hydraulic jack is that double-rod is double
Acting cylinder.
The most according to claim 5, a kind of hydraulic gate flow control system, before the piston of described hydraulic jack
Hold effective hydraulic action area less than piston rear end effective hydraulic action area.
7. according to hydraulic gate flow control system a kind of described in claim 4 or 5 or 6, described flat valve
Spool oil-in is connected by the oil pump of pipeline with supply hydraulic gate pressure oil, and described spool oil return opening leads to
Cross pipeline to be connected with fuel tank.
The most according to claim 7, a kind of hydraulic gate flow control system, before the piston of described hydraulic jack
Chamber is parallel with accumulator by oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620085583.7U CN205533498U (en) | 2016-01-28 | 2016-01-28 | Hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620085583.7U CN205533498U (en) | 2016-01-28 | 2016-01-28 | Hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN205533498U true CN205533498U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620085583.7U Active CN205533498U (en) | 2016-01-28 | 2016-01-28 | Hydraulic rock drill flat valve and that uses joins in marriage a class control system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526207A (en) * | 2016-01-28 | 2016-04-27 | 山河智能装备股份有限公司 | Distributing valve for hydraulic rock drill and distributing control system applied to hydraulic rock drill |
-
2016
- 2016-01-28 CN CN201620085583.7U patent/CN205533498U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526207A (en) * | 2016-01-28 | 2016-04-27 | 山河智能装备股份有限公司 | Distributing valve for hydraulic rock drill and distributing control system applied to hydraulic rock drill |
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