CN103486291A - Manual control valve - Google Patents
Manual control valve Download PDFInfo
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- CN103486291A CN103486291A CN201310401456.4A CN201310401456A CN103486291A CN 103486291 A CN103486291 A CN 103486291A CN 201310401456 A CN201310401456 A CN 201310401456A CN 103486291 A CN103486291 A CN 103486291A
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- Prior art keywords
- control valve
- pilot valve
- valve
- main control
- drain pan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a manual control valve, and belongs to the field of hydraulic control valves. The manual control valve comprises a main control valve and a pilot valve. A cavity is arranged in a valve spool, the pilot valve is slidably arranged in the cavity, second oil drain grooves are formed in the pilot valve, first oil drain grooves are respectively formed in two ends of the valve spool of the main control valve, and one end of each first oil drain groove is communicated with a corresponding oil port of the main control valve; when the pilot valve is located at an initial position, the two oil ports of the main control valve are respectively communicated with two oil ports of the pilot valve, and the other end of each first oil drain groove is closed by the outer wall of the pilot valve; when the pilot valve moves towards one side by the maximum distance, the other end of each first oil drain groove on the same side of the movement direction of the pilot valve is communicated with the corresponding second oil drain groove, and the other end of each first oil drain groove on the side opposite to the movement direction of the pilot valve is closed by the outer wall of the pilot valve; through holes which are respectively communicated with the second oil drain grooves and a return oil port of the main control valve are formed in the pilot valve. The manual control valve has the advantages that the pilot valve structure is added to the manual control valve, so that the manual control valve can be manually controlled, the integral main control valve does not need to be replaced, or a decompression device can be omitted.
Description
Technical field
The present invention relates to field of hydraulic control, particularly a kind of hand behaviour control valve.
Background technique
Hand behaviour control valve, as the control unit of hydraulic system, requires it to control accurate, compact structure and simple to operate usually.
At present, generally by hand control and the crank mechanism of hand behaviour control valve inside or the handle that shifting fork mechanism is connected, directly overcome hand behaviour control valve frictional force, clamping force, spring reset power and hand in the course of the work with manpower and grasp the hydraulic power in the valve core movement process of control valve, and then realize the manual control of hand behaviour control valve.In the main body parameter (as flow and pressure etc.) of hydraulic system, require hour, the spool size of hand behaviour control valve is less, making a concerted effort of frictional force, clamping force, spring reset power and the hydraulic power of valve member motion is relative also less, and the strength of people's hand can overcome, and realizes hand behaviour.
In realizing process of the present invention, the inventor finds that at least there is following problem in prior art:
Along with improving constantly of hydraulic system main body parameter, the physical dimension of hand behaviour control valve also constantly strengthens, the reposition force of the frictional force produced during its work, clamping force, spring and hydraulic power all significantly improve, now, staff direct manipulation hand behaviour control valve, just need to use very large steering force, if reduce this steering force, just very huge effort-saving mechanism need to be arranged, so can not meet again the requirement of hand behaviour control valve to compactedness.Therefore, with the increase of the physical dimension of setting about controlling valve processed, conventional hand is controlled valve arrangement processed and is difficult to meet the requirement of compact structure again of little while of steering force.
Summary of the invention
Can not meet compactedness and the little problem of steering force in order to solve hand behaviour control valve in prior art, the embodiment of the present invention provides a kind of hand behaviour control valve simultaneously.Described technological scheme is as follows:
The invention provides a kind of hand behaviour control valve, comprise main control valve and operating grip, described main control valve comprises: housing, protecgulum, bonnet and slip are arranged in described housing, the rear and front end of described spool forms two main control valve hydraulic fluid ports with described protecgulum and described bonnet respectively, it is characterized in that, be provided with cavity in described spool, slide and be provided with pilot valve in described cavity, described pilot valve and described operating grip are in transmission connection, be provided with the second drain pan on described pilot valve, the spool two ends of described main control valve arrange respectively the first drain pan, one end of described the first drain pan is communicated with described main control valve hydraulic fluid port, when described pilot valve during in initial position, two described main control valve hydraulic fluid ports are communicated with two described pilot valve hydraulic fluid ports respectively, the other end of described the first drain pan is by the closed front of described pilot valve, when described pilot valve arrives ultimate range to a lateral movement, with the other end of described first drain pan of described pilot valve moving direction homonymy, with described the second drain pan, be communicated with, the other end of described first drain pan of tossing about with described pilot valve moving direction is by the closed front of described pilot valve, be provided with the through hole be communicated with described the second drain pan and main control valve return opening respectively on described pilot valve.
Alternatively, the minimum range of the notch of the notch of described the first drain pan and described the second drain pan is X
1, the minimum range of the spool of the hydraulic fluid port of described pilot valve and the described main control valve of homonymy is X
1, and X
0>X
1.
Alternatively, when described spool is positioned at initial position, the cross sectional area equal and opposite in direction of two described main control valve hydraulic fluid ports and corresponding described pilot valve hydraulic fluid port connectivity part.
Alternatively, between described protecgulum and described spool, be provided with for the automatically reset valve core reseting spring assembly of described spool, one end of described valve core reseting spring assembly band spring is fixedly mounted on the end face of described spool, and the described valve core reseting spring assembly the other end is actively plugged in described protecgulum.
Alternatively, described valve core reseting spring assembly is two.
Alternatively, between described protecgulum and described pilot valve, be provided with for the automatically reset pilot valve return spring assembly of described pilot valve, one end of described pilot valve return spring assembly band spring is fixedly mounted in described pilot valve, and the described pilot valve return spring assembly the other end is actively plugged in described protecgulum.
Alternatively, be provided with the first Remote mouth on described protecgulum, the front end of described pilot valve is positioned at described the first Remote mouth, is provided with the second Remote mouth on described bonnet, and the rear end of described pilot valve is positioned at described the second Remote mouth.
Alternatively, described the first drain pan is L-type.
Alternatively, described the second drain pan is arranged on the outer surface of described pilot valve.
Alternatively, described pilot valve and described operating grip are in transmission connection by transmitting assemblies, described transmitting assemblies comprises thrust link, connecting rod and crank, one end of described thrust link is inserted in described pilot valve, the other end of described thrust link is hinged through an end of the interlayer of described bonnet and described connecting rod, one end of the other end of described connecting rod and described crank is hinged, and the other end of described crank and the connecting end of described operating grip are hinged.
The beneficial effect that the technological scheme that the embodiment of the present invention provides is brought is: hand behaviour control valve provided by the invention by having increased the pilot valve structure in the hollow cavity of main control valve, high pressure oil is incorporated into to the two ends of main control valve, force balance, send the high pressure oil at main control valve two ends back to low pressure port T by pilot valve again, thereby realize that the controlled movement of main control valve is in pilot valve, because the pilot valve structure is little stressed little, handle simply, hand behaviour control valve therefore provided by the invention meets the requirement of compact structure again of little while of steering force.
The accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is hand that the embodiment of the present invention the provides structural representation when controlling valve processed and being positioned at initial position;
Fig. 2 is hand that the embodiment of the present invention the provides structural representation when controlling valve processed and being positioned at positive operation;
Fig. 3 is hand that the embodiment of the present invention the provides structural representation when controlling valve processed and being positioned at reverse operating.
In figure: the 1-main control valve, the spool of 101-main control valve, the 2-pilot valve, the 3-protecgulum, the 4-bonnet, 5-the first drain pan, 6-the second drain pan, the 7-through hole, 8-valve core reseting spring assembly, 9-pilot valve return spring assembly, the 10-thrust link, the 11-connecting rod, the 12-crank, the 13-operating grip, the 14-one-way valve, the 15-throttle valve, 16-pilot valve stop collar, the 17-housing, X-the first Remote mouth, Y-the second Remote mouth, P-system filler opening, P1-main control valve hydraulic fluid port, P2-pilot valve hydraulic fluid port, T-main control valve return opening.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment
The embodiment of the present invention provides a kind of hand behaviour control valve, as Fig. 1, shown in Fig. 2 and Fig. 3, this hand behaviour control valve comprises main control valve 1 and operating grip 13, main control valve 1 comprises: housing 17, protecgulum 3, bonnet 4 and slip are arranged at the spool 101 in housing 17, the rear and front end of spool 101 forms two main control valve hydraulic fluid port P1 with protecgulum 3 and bonnet 4 respectively, be provided with cavity in spool 101, slide and be provided with pilot valve 2 in this cavity, pilot valve 2 is in transmission connection with operating grip 13, be provided with the second drain pan 6 on pilot valve 2, the two ends of spool 101 are respectively arranged with the first drain pan 5, one end of the first drain pan 5 is communicated with main control valve hydraulic fluid port P1, when pilot valve 2 during in initial position, two main control valve hydraulic fluid port P1 are communicated with two pilot valve hydraulic fluid port P2 of pilot valve 2 respectively, wherein, pilot valve hydraulic fluid port P2 is by determining the position of pilot valve 2 motions, determine that again pilot valve hydraulic fluid port P2 is for being communicated with or closing, the other end of the first drain pan 5 is by the closed front of pilot valve 2, when pilot valve 2 arrives ultimate range to a lateral movement, with the other end of the first drain pan 5 of pilot valve 2 moving direction homonymies, with the second drain pan 6, be communicated with, the other end of first drain pan 5 of tossing about with pilot valve 2 moving direction is by the closed front of pilot valve 2, on pilot valve 2, be provided with respectively with the second drain pan 6 and main control valve oil return inlet T by the through hole 7 be communicated with, wherein through hole 7 can be realized being communicated with by connecting pipeline with the main control valve oil return inlet T, mode of communicating should not only limit to pipeline connection yet herein.In addition, the initial position of pilot valve 2 refers to: pilot valve hydraulic fluid port P2 is the residing position of pilot valve 2 during oil-feed not.
Preferably, this first drain pan 5 is four, and the second drain pan 6 is two simultaneously.In addition, this second drain pan 6 also can be one, and this second drain pan 6 is along the outer wall circumference of pilot valve 2, and simultaneously, the first drain pan 5 can be arranged symmetrically with on the spool 101 of main control valve 1.
Alternatively, as shown in Figure 2, the minimum range of the first drain pan 5 and the second drain pan 6 is X
1, the minimum range of the main control valve hydraulic fluid port P1 of pilot valve hydraulic fluid port P2 and homonymy is X
0, and X
0>X
1.Only has the X of working as
0>X
1during valve port, the first drain pan 5 just may be linked up with the second drain pan 6, makes the spool 101 of main control valve 1 with pilot valve 2 motions.
Alternatively, when spool 101 is positioned at initial position, two main control valve hydraulic fluid port P1 equate with the cross sectional area of corresponding pilot valve hydraulic fluid port P2 connectivity part.Wherein, the initial position of spool 101 is the not residing neutral position of spool 101 during oil-feed of main control valve hydraulic fluid port P1, and operating grip 13 now also is positioned at neutral position.
Alternatively, between protecgulum 3 and spool 101, be provided with for the automatically reset valve core reseting spring assembly 8 of spool 101, valve core reseting spring assembly 8 is fixedly mounted on the end face of spool 101 with an end of spring, valve core reseting spring assembly 8 the other ends are actively plugged in protecgulum 3.
Alternatively, valve core reseting spring assembly 8 is two.Valve core reseting spring assembly 8 can be guaranteed spool 101 automatically and get back to exactly initial position.
Alternatively, between protecgulum 3 and pilot valve 2, be provided with for the automatically reset pilot valve return spring assembly 9 of pilot valve 2, pilot valve return spring assembly 9 is fixedly mounted in pilot valve 2 with an end of spring, and pilot valve return spring assembly 9 the other ends are actively plugged in protecgulum 3.
Alternatively, be provided with the first Remote mouth X on protecgulum 3, the front end of pilot valve 2 is positioned at the first Remote mouth X, is provided with the second Remote mouth Y on bonnet 4, and the rear end of pilot valve 2 is positioned at the second Remote mouth Y.The first Remote mouth X and the second Remote mouth Y and pilot valve 2 all are tightly connected, the first Remote mouth X and the second Remote mouth Y, when not using remote control, can or take back respectively fuel tank separately by the first Remote mouth X and the second Remote mouth Y connection; When the needs Remote is controlled, this Remote interface access remote control hydraulic system just can be realized to long-range hydraulic control replaces the other manually-operable of machine.
Alternatively, the first drain pan 5 is L-type.
Alternatively, the second drain pan 6 is arranged on the outer surface of pilot valve 2.
Alternatively, pilot valve 2 is in transmission connection by transmitting assemblies with operating grip 13, transmitting assemblies comprises thrust link 10, connecting rod 11 and crank 12, one end of thrust link 10 is inserted in pilot valve 2, the other end of thrust link 10 is hinged through an end of the interlayer of bonnet 4 and connecting rod 11, one end of the other end of connecting rod 11 and crank 12 is hinged, and the connecting end of the other end of crank 12 and operating grip 13 is hinged.In addition, connecting rod 11, crank 12 and operating grip 13 are positioned at the main control valve oil return inlet T.
Alternatively, be provided with pilot valve stop collar 16 on the surface of contact of pilot valve 2 and the second Remote mouth Y.
The control valve that hand is grasped that the embodiment of the present invention provides is connected in pressure duct, and its working principle is as follows:
As shown in Figure 2, two main control valve hydraulic fluid port P1 are communicated with pressure duct respectively, the positive operation of hand behaviour control valve, operating grip 13 is driven to pilot valve 2 to be moved to the left, now first drain pan 5 in left side is communicated with the second drain pan 6, first drain pan 5 on right side is by the closed front of pilot valve 2, high pressure oil first drain pan 5 of flowing through successively in the main control valve hydraulic fluid port P1 in left side so, the second drain pan 6 and through hole 7 enter in the main control valve oil return inlet T of low pressure, thereby make spool 101 stress balances be broken, make spool 101 with pilot valve 2 to left movement, realize handling pilot valve 2 and driven the purpose of spool 101 to left movement.
As shown in Figure 3, the reverse operating of hand behaviour control valve, operating grip 13 is driven to pilot valve 2 to be moved to the right, now first drain pan 5 on right side is communicated with the second drain pan 6, first drain pan 5 in left side is by the closed front of pilot valve 2, high pressure oil in pressure duct is flowed into the pilot valve hydraulic fluid port P2 on pilot valve 2 right sides by the main control valve hydraulic fluid port P1 on right side, high pressure oil in the main control valve hydraulic fluid port P1 on right side first drain pan 5 of flowing through successively so, the second drain pan 6 and through hole 7 enter in the main control valve oil return inlet T of low pressure, thereby make spool 101 stress balances be broken, make the spool 101 of main control valve 1 move right with pilot valve 2, realize handling pilot valve 2 and driven the purpose of the spool 101 of main control valve 1 to left movement.
When pilot valve 2 moves to certain position, now, people's steering force no longer applies, due to, the existence of pilot valve return spring assembly 9, pilot valve 2 meeting positive return, spool 101 motions that equally also can order about main control valve 1 reset.If spool 101 movement travels of main control valve 1 surpass pilot valve 2, stressed meeting is balance or hinder it and further travel forward again, make the spool 101 of main control valve 1 must be according to the movement position equilibrium establishment position of pilot valve 2, now, when if pilot valve 2 no longer moves in a certain position, the spool 101 of main control valve 1 will be followed its corresponding position of moving, and under the effect of high pressure oil rebalancing guarantee that two main control valve hydraulic fluid port P1 all are not communicated with the main control valve oil return inlet T.For guaranteeing that the spool 101 of main control valve 1 also can be got back to initial position automatically, avoids the initial start-up misoperation under logical high pressure oil condition, in addition, main valve Returnning spring group 8 also can guarantee that main control valve 1 gets back to initial position automatically.The first Remote mouth X and the second Remote mouth Y, when not using remote control, can or take back alone respectively fuel tank by the first Remote mouth X and the second Remote mouth Y connection; When the needs Remote is controlled, this Remote interface X, Y access remote control hydraulic system just can be realized to long-range hydraulic control replaces the other manually-operable of machine.
Hand behaviour's control valve application in practice that the embodiment of the present invention provides:
The specified through-current capability of main control valve 1 is 6000L/min, maximum delivery pressure 8Mpa, and the range of main control valve 1 is 60mm, the end face diameter of the spool 101 of main control valve 1 is 250mm, flow velocity ν=5.7m/s, spool 101 deadweight 160KG, and the meta of main control valve 1 is H type Median Function.
Particularly, the stressed F of main control valve 1
mainby following components, formed:
F
main=F
reset+ F
clamping force+ F
hydraulic power+ F
frictional force
F
reset---the Returnning spring power of main control valve 1 is specially 3000N;
F
clamping force---the oil pressure chucking caused because of the foozle (circularity and straightness error) of the valve body of main control valve 1 and valve opening (hole of offering on this valve opening general reference main control valve 1), can't directly calculate, in related domain in computational methods commonly used, by 10% of spring reset power, estimated, the actual value here is 300N;
F
hydraulic power---mainly refer to the steady-state fluid force of the spool 101 of main control valve 1.
F
frictional force---during spool 101 motion of main control valve 1, the surface friction drag of the valve body of main control valve 1 and valve opening (due to the spool 101 Action of Gravity Fields generations of the surface roughness of valve opening and main control valve 1).
Substitution formula: F
hydraulic power=ρ q ν cos α, wherein:
The density of ρ---high pressure oil is 800kg/m here
3;
Q---the flow of the valve port of the main control valve 1 of flowing through is 6000L/min here;
ν---flow velocity, get ν=5.7m/s here;
The valve port efflux angle of α---main control valve 1, generally get α=69 °;
By calculating:
F
hydraulic power=163N
F
frictional force=μ mg
The spool 101 of μ---main control valve 1 and the friction factor of housing 17, get 0.3 here;
Spool 101 deadweights of m---main control valve 1 are 160KG here;
Substitution calculates: F
frictional force=470N
According to the stress balance of motion, obtain:
The end face diameter of the spool 101 of d---main control valve 1 is 250mm here;
△ p---the pressure difference value that drives main control valve 1 motion to produce by draining;
Substitution calculates: △ p=0.08MPa.
In actual use, because high pressure oil all will be subject to the throttling of main control valve 1, will inevitably produce certain pressure loss could flow out, usually this pressure loss value is at 0.3-0.5Mpa, and main control valve 1 is while existing load, this pressure loss value can, considerably beyond 0.3-0.5Mpa, therefore, need fully to meet the required pressure reduction of main control valve 1 motion in actual use.
The same main valve of the force analysis of pilot valve 2:
F
main=f
reset+ f
clamping force+ f
hydraulic power+ f
frictional force
Because pilot valve 2 does not have the high pressure oil effect substantially, so hydraulic power can not consider, the maximum reset power of pilot valve return spring assembly 9 is 500N here, and the weight of pilot valve 2 is 30kg, and substitution is calculated to be had: f
main=638N, the velocity ratio of supposing crank mechanism is definite value, from above-mentioned calculating, not adopting steering force that the hand control valve of pilot valve 2 needs is 6.2 times of hand control valve that adopt pilot valve 2, i.e. F
main/ f
main≈ 6.2.As can be seen here, adopt hand behaviour control valve provided by the invention can significantly reduce the size of steering force.
The hand behaviour control valve that the embodiment of the present invention provides by having increased the pilot valve structure in the hollow cavity of main control valve, high pressure oil is incorporated into to the two ends of main control valve, force balance, send the high pressure oil at main control valve two ends back to low pressure port by pilot valve again, thereby realize that the controlled movement of main control valve is in pilot valve, because the pilot valve structure is little stressed little, handle simple, hand behaviour control valve therefore provided by the invention meets the requirement of compact structure again of little while of steering force, simultaneously, install at existing main control valve the manipulation that pilot valve can be realized staff additional, without changing whole main control valve or installing decompressor additional, the hand behaviour control valve that the embodiment of the present invention provides, if the spool size of main control valve increases a lot, the operating mechanism of its main control valve still can meet the requirement of manipulation without corresponding increase.In addition, hand that the embodiment of the present invention provides behaviour control valve, the position at the spool place of the reaction main control valve that the position of operating grip can be similar to, i.e. the aperture of valve port, and, without extra power equipment, reduced cost.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a hand is grasped control valve, comprise main control valve and operating grip, described main control valve comprises: housing, protecgulum, bonnet and slip are arranged in described housing, the rear and front end of described spool forms two main control valve hydraulic fluid ports with described protecgulum and described bonnet respectively, it is characterized in that, be provided with cavity in described spool, slide and be provided with pilot valve in described cavity, described pilot valve and described operating grip are in transmission connection, be provided with the second drain pan on described pilot valve, the spool two ends of described main control valve arrange respectively the first drain pan, one end of described the first drain pan is communicated with described main control valve hydraulic fluid port, when described pilot valve during in initial position, two described main control valve hydraulic fluid ports are communicated with two described pilot valve hydraulic fluid ports respectively, the other end of described the first drain pan is by the closed front of described pilot valve, when described pilot valve arrives ultimate range to a lateral movement, with the other end of described first drain pan of described pilot valve moving direction homonymy, with described the second drain pan, be communicated with, the other end of described first drain pan of tossing about with described pilot valve moving direction is by the closed front of described pilot valve, be provided with the through hole be communicated with described the second drain pan and main control valve return opening respectively on described pilot valve.
2. hand behaviour control valve according to claim 1, is characterized in that, the minimum range of the notch of the notch of described the first drain pan and described the second drain pan is X
1, the minimum range of the spool of the hydraulic fluid port of described pilot valve and the described main control valve of homonymy is X
1, and X
0>X
1.
3. hand according to claim 1 behaviour control valve, is characterized in that, when described spool is positioned at initial position, and the cross sectional area equal and opposite in direction of two described main control valve hydraulic fluid ports and corresponding described pilot valve hydraulic fluid port connectivity part.
4. hand according to claim 1 is grasped control valve, it is characterized in that, between described protecgulum and described spool, be provided with for the automatically reset valve core reseting spring assembly of described spool, one end of described valve core reseting spring assembly band spring is fixedly mounted on the end face of described spool, and the described valve core reseting spring assembly the other end is actively plugged in described protecgulum.
5. hand behaviour control valve according to claim 4, is characterized in that, described valve core reseting spring assembly is two.
6. hand according to claim 1 is grasped control valve, it is characterized in that, between described protecgulum and described pilot valve, be provided with for the automatically reset pilot valve return spring assembly of described pilot valve, one end of described pilot valve return spring assembly band spring is fixedly mounted in described pilot valve, and the described pilot valve return spring assembly the other end is actively plugged in described protecgulum.
7. hand according to claim 1 is grasped control valve, it is characterized in that, be provided with the first Remote mouth on described protecgulum, the front end of described pilot valve is positioned at described the first Remote mouth, be provided with the second Remote mouth on described bonnet, the rear end of described pilot valve is positioned at described the second Remote mouth.
8. hand behaviour control valve according to claim 1, is characterized in that, described the first drain pan is L-type.
9. hand behaviour control valve according to claim 1, is characterized in that, described the second drain pan is arranged on the outer surface of described pilot valve.
10. hand according to claim 1 is grasped control valve, it is characterized in that, described pilot valve and described operating grip are in transmission connection by transmitting assemblies, described transmitting assemblies comprises thrust link, connecting rod and crank, one end of described thrust link is inserted in described pilot valve, the other end of described thrust link is hinged through an end of the interlayer of described bonnet and described connecting rod, one end of the other end of described connecting rod and described crank is hinged, and the other end of described crank and the connecting end of described operating grip are hinged.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776075A (en) * | 2014-01-14 | 2015-07-15 | 卡特彼勒（青州）有限公司 | Hydraulic valve and loader including same |
| CN106438538A (en) * | 2016-07-11 | 2017-02-22 | 润琛液压机械南通有限公司 | Hydraulic valve for caterpillar band harvester |
| CN108105189A (en) * | 2017-11-09 | 2018-06-01 | 武汉船用机械有限责任公司 | A kind of proportional direction valve |
| CN114060344A (en) * | 2021-11-22 | 2022-02-18 | 山东临工工程机械有限公司 | Pilot handle valve, hydraulic system of excavator and control method of hydraulic system |
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| US5236015A (en) * | 1989-12-13 | 1993-08-17 | Hydrolux S.A.R.L. | Position-controlled proportional directional valve |
| JP4052881B2 (en) * | 2002-06-04 | 2008-02-27 | 株式会社テージーケー | 3-way selector valve |
| CN1766384A (en) * | 2004-10-25 | 2006-05-03 | Smc株式会社 | Electromagnetic pilot type directional control valve |
| CN201269329Y (en) * | 2008-08-21 | 2009-07-08 | 上海立新液压有限公司 | Three-way pressure reducing valve |
| CN201851708U (en) * | 2010-10-29 | 2011-06-01 | 胡安方 | Double-power switching valve |
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| CN104776075A (en) * | 2014-01-14 | 2015-07-15 | 卡特彼勒（青州）有限公司 | Hydraulic valve and loader including same |
| CN106438538A (en) * | 2016-07-11 | 2017-02-22 | 润琛液压机械南通有限公司 | Hydraulic valve for caterpillar band harvester |
| CN108105189A (en) * | 2017-11-09 | 2018-06-01 | 武汉船用机械有限责任公司 | A kind of proportional direction valve |
| CN108105189B (en) * | 2017-11-09 | 2020-04-14 | 武汉船用机械有限责任公司 | Proportional direction valve |
| CN114060344A (en) * | 2021-11-22 | 2022-02-18 | 山东临工工程机械有限公司 | Pilot handle valve, hydraulic system of excavator and control method of hydraulic system |
| CN114060344B (en) * | 2021-11-22 | 2023-06-02 | 山东临工工程机械有限公司 | Pilot handle valve, hydraulic system of excavator and control method of hydraulic system |
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