CN102996559B - Rotary control valve, rotary control system and hoist - Google Patents
Rotary control valve, rotary control system and hoist Download PDFInfo
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- CN102996559B CN102996559B CN201210581251.4A CN201210581251A CN102996559B CN 102996559 B CN102996559 B CN 102996559B CN 201210581251 A CN201210581251 A CN 201210581251A CN 102996559 B CN102996559 B CN 102996559B
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Abstract
The invention discloses a kind of rotary control valve, rotary control system and hoist, relate to technical field of engineering machinery, solve prior art and there is the poor technical problem of system reliability.This rotary control valve comprises the first valve, the second valve and the 3rd valve, and when the second valve is in the first state, the first valve is connected with fuel tank by the first asphalt channel; When second valve is in the second state, the first valve is connected with the 3rd valve by the second asphalt channel; When 3rd valve is on state, the 3rd valve is connected with the second asphalt channel of the second valve, the first working connection port and the second working connection port respectively; When 3rd valve is in cut-off state, the oil circuit between the second asphalt channel of the 3rd valve and the second valve, the first working connection port and the second working connection port ends.This rotary control system, hoist include rotary control valve provided by the invention.The present invention is for improving the reliability of rotary control system.
Description
Technical field
The present invention relates to technical field of engineering machinery, be specifically related to a kind of rotary control valve, the rotary control system of this rotary control valve be set and the hoist of this rotary control system is set.
Background technique
Crane is primarily of lazy arm telescopic mechanism, turntable rotating mechanism, winding lifting mechanism three movement mechanism composition.
As shown in Figure 1, turntable rotating mechanism 13 Main Function drives arm 14, turntable 15 with the center line of turntable 15 for benchmark rotates, thus laid in a desired direction by hung weight.Turntable rotating mechanism 13, primarily of rotary motor 3 and speed reducer composition, realizes controlling turntable 15 rotating speed and gyratory directions with turning to by the rotating speed controlling rotary motor 3.The control of rotary motor 3 is realized by rotary control system, is the Security of guarantee rotary system, stationarity and reliability simultaneously, and rotary control system need possess control hoist and realize several the functions such as rotary braking, revolution buffering and free rotary.
In prior art, rotary control system is closed system, closed system refers to that the hydraulic oil that oil pump exports directly enters executive component by pipeline, the oil suction of executive component with pump hydraulic fluid port and be connected, the oil return of executive component is connected with the oil suction of oil hydraulic pump, thus forms the closed circuit between pump-actuator.Oil pump in closed system uses two-way variable displacement pump usually, can be controlled the speed of executive component by adjustment bidirectional variable pump delivery.
As shown in Figure 2, existing rotary control system comprises slippage pump 1, two-way variable displacement pump 2, rotary motor 3, Controlling solenoid valve 4, wherein: two-way variable displacement pump 2 provides required pressure oil for executive component and rotary motor 3, Controlling solenoid valve 4 is used for controlling the displacement variation of two-way variable displacement pump 2 in order to realize the control of rotary motor 3 rotating speed.Slippage pump 1 Main Function supplements in time in closed circuit because each element leaks the flow loss caused.
At present, large-tonnage closed rotary control system generally uses principle as shown in Figure 3 and Figure 4, namely on the basis of above-mentioned closed system, import and export on hydraulic fluid port working connection at two-way variable displacement pump 2 and A1, B1 position directly connects rotary control valve 5, and use break 6 to brake for rotary motor 3 in systems in which.By cooperatively interacting between Controlling solenoid valve 4, rotary control valve 5 and break 6, realize the functions such as the rotation of rotary motor 3, stopping, emergency braking and revolution buffering, thus realize hoister in large tonnage revolution action safety, reliable operation.
When revolution Joystick returns meta (now, Controlling solenoid valve electric current is 0), though without flow in system, but because inertia exists, rotary motor 3 and rotating platform of crane will be rotated further as shown in Figure 3 and Figure 4, now for ensureing that rotary motor 3 stops operating in time, the closedown along with Joystick closes to realize braking by break 6 in time.In addition, running under urgency or dangerous situation, user can make break 6 close in time by controlling rotary control valve 5, realizes emergency braking, to prevent unexpected generation.
When hoist does revolution action stopping, because swirl gear own wt is larger, rotary inertia is larger, larger impact will be produced during stopping, causing car load to rock, time serious, security incident will occur, therefore hydraulic system need possess revolution pooling feature, when revolution is stopped, action is tried one's best gently on the one hand, and the inertial force on the other hand this process being produced is converted into the earth pressure release of hydraulic system, thus steady, safety when realizing revolution action stopping.
During craning weight of same operation, because lifted weight shape, material are had nothing in common with each other, therefore can not ensure that the center of gravity of weight is positioned at (namely weight center of gravity is consistent with hoist center of gravity) immediately below suspension hook, now just have unbalance loading to produce, just likely cause hoist to tilt when offset loading force arrives greatly certain value, even turn on one's side time serious.For head it off, turntable also needs to have free rotary function, for realizing free rotary function, when hoist does lift heavy trainstop open, rotary motor oil inlet and oil return mouth be communicated with, make rotary motor be in free floating state, now turntable can freely rotate.Under offset loading force effect, hoist center of gravity is overlapped on same vertical line with weight center of gravity automatically, thus eliminate offset loading force, play safety protection effect.
The control procedure of existing rotary control system is as shown in Figure 4 as follows:
1, when the turntable of hoist does revolution action (Controlling solenoid valve 4 carrys out control pump discharge capacity according to Joystick position), solenoid valve 51 in rotary control valve 5 obtains electric, the X mouth of break 6 and rotary control valve 5 connected by external oil sources pressure oil simultaneously, break 6 is opened, selector valve (being specially guiding valve) 52 spool commutates to right position, high pressure oil is made to enter the spring chamber of cartridge valve 54 through selector valve 52, cartridge valve 54 is closed, therefore two-way variable displacement pump 2 imports and exports A1 on hydraulic fluid port working connection, the oil circuit at B1 place is obstructed, and hoist does revolution action.
2, the turntable of hoist is in pivotal process, if solenoid valve 51 power-off, now the spool of selector valve 52 gets back to left position, and cartridge valve 54 is opened, and A, B mouth that two-way variable displacement pump 2 is imported and exported on hydraulic fluid port working connection is communicated with; Break 6 pressure oil is by one-way throttle valve 9 oil sump tank, and break 6 is braked, and realizes revolution emergency braking.
3, the turntable of hoist under static state, make solenoid valve 53 and solenoid valve 51 obtain electric simultaneously, hydraulic oil in cartridge valve 54 spring chamber is by oil sump tank rapid after selector valve 52 and solenoid valve 53, now break 6 is opened, and A, B mouth that two-way variable displacement pump 2 is imported and exported on hydraulic fluid port working connection is communicated with, thus realize free rotary action.
At least there is following technical problem in prior art as shown in Figure 4 rotary control system:
1, in rotary control system rotary control valve 5 and break 6 all by the control of the hydraulic oil of the output of external oil sources (or claim: external control oil sources) 10, because rotary control valve 5 and both breaks 6 exist contact, so each several part fault is comparatively large on the impact of other functions, cause the reliability of system poor.
2, in rotary control valve 5, selector valve 52 spool is subject to the pressure of external oil sources 10, flow effect larger, revolution action corresponding delay may be caused when external oil sources 10 pressure, underfed, and when external oil sources 10 pressure, flow may cause revolution corresponding too fast time larger, cause system shock, make action not steady.
If in 3 braking system after one-way throttle valve 9 hair fastener, break 6 oil return will be caused freely cannot not to close, selector valve 52 can not Hui Zuowei completely, now will produce turntable and independently rotate by self gravitation in operatorless situation, influential system Security.
4, the program uses break 6 buffering method to provide revolution cushioning control function, and the method cushioning effect is undesirable.In the program, buffering is the slowly closing being realized break by the flow control of the throttle valve in individual event throttle valve 9, thus realize pivotal pooling feature, the cushioning effect of the program is only relevant with the restriction size of individual event throttle valve 9, have nothing to do with the factor such as rotating speed, rotary inertia, under high rotating speed or the larger operating mode of rotary inertia, cushioning effect is limited.
5, by Controlling solenoid valve 51, realize braking after then making selector valve 52 go back tos left positions, this process affects by hydraulic response system performance, causes having time delay during braking and produces.
Summary of the invention
The object of the invention is to propose a kind of rotary control valve, the rotary control system of this rotary control valve is set and the hoist of this rotary control system is set, solve prior art and there is the poor technical problem of system reliability.In addition, optimal technical scheme of the present invention also solves the technical problem that postponing, revolution action is uneven surely, rotary control system reliability is poor easily appears in prior art existence revolution action.
For achieving the above object, the invention provides following technological scheme:
The rotary control valve that the embodiment of the present invention provides, comprises the first valve, the second valve and the 3rd valve, wherein:
Described first valve comprises the first working connection port, the second working connection port and oil circuit control port, and described second valve comprises the first asphalt channel and the second asphalt channel;
When described oil circuit control port is connected with described first asphalt channel of described second valve, described first working connection port is connected with described second working connection port;
When described second valve is in the first state, described first valve is connected with fuel tank by described first asphalt channel; When described second valve is in the second state, described first valve is connected with described 3rd valve by described second asphalt channel;
When described 3rd valve is on state, described 3rd valve is connected with described second asphalt channel of described second valve, described first working connection port and described second working connection port respectively; When described 3rd valve is in cut-off state, the oil circuit between described second asphalt channel of described 3rd valve and described second valve, described first working connection port and described second working connection port ends.
In one alternatively or preferably embodiment, described second valve and described 3rd valve are solenoid valve.
In one alternatively or preferably embodiment, described second valve is two position four-way solenoid valves.
In one alternatively or preferably embodiment, described 3rd valve is 2/2-way solenoid valve.
In one alternatively or preferably embodiment, described first valve is cartridge valve.
In one alternatively or preferably embodiment, this rotary control valve also comprises relief valve or damping member, wherein:
The filler opening of described relief valve or the filler opening of described damping member are connected with described 3rd valve;
The oil outlet of described relief valve or the oil outlet of described damping member are connected with described first working connection port and described second working connection port respectively.
In one alternatively or preferably embodiment, this rotary control valve comprises described relief valve, and this rotary control valve also comprises the first one-way valve and the second one-way valve, wherein:
Described first one-way valve and described second one-way valve filler opening separately are all connected with the oil outlet of described relief valve;
The oil outlet of described first one-way valve is connected with described first working connection port;
The oil outlet of described second one-way valve is connected with described second working connection port.
In one alternatively or preferably embodiment, this rotary control valve also comprises shuttle valve, wherein:
The oil outlet of described shuttle valve is connected with described second asphalt channel of described second valve and described 3rd valve respectively, two filler openings of described shuttle valve one of them be connected with described first working connection port, wherein another is connected with described second working connection port two filler openings of described shuttle valve.
The rotary control system that the embodiment of the present invention provides, comprises the rotary control valve that two-way variable displacement pump, rotary motor, the first oil circuit, the second oil circuit, break, braking valve and the arbitrary technological scheme of the present invention provide, wherein:
By described first oil circuit and described second oil circuit, one of them is connected with the filler opening of described rotary motor the oil outlet of described two-way variable displacement pump, and by described first oil circuit, wherein another is connected with the oil outlet of described rotary motor the filler opening of described two-way variable displacement pump with described second oil circuit;
Described two-way variable displacement pump is the power fluid force feed that described rotary motor supply drives described rotary motor to operate by described first oil circuit or described second oil circuit;
Described first oil circuit is connected with the first working connection port of the first valve described in described rotary control valve, and described second oil circuit is connected with the second working connection port of described first valve;
Described braking valve (being preferably two position four-way solenoid valves) comprises the first hydraulic oil channel and the second hydraulic oil channel, when described braking valve is in the first state, the rod chamber of described break is connected with fuel tank by described first hydraulic oil channel, when described braking valve is in the second state, external oil sources is connected with the rod chamber of described break by described second hydraulic oil channel.
The hoist that the embodiment of the present invention provides, comprises the rotary control system that the arbitrary technological scheme of turntable, Joystick and the present invention provides, wherein:
Described Joystick is connected with described second valve, described 3rd valve and described braking valve, and described Joystick can switch described second valve, described braking valve when moving between the first state and the second state, and described 3rd valve can be switched between on state and cut-off state.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
The rotary control valve provided due to the embodiment of the present invention comprises the second valve (being preferably two position four-way solenoid valves) and the 3rd valve (being preferably 2/2-way solenoid valve), can by realizing oil circuit i.e. the first oil circuit be communicated with the second working connection port the first working connection port of the first valve to the switching of the second valve and the 3rd valve state, the switching of the second oil circuit, whether the first working connection port that can control the first valve is thus communicated with the second working connection port, whether the first oil circuit is communicated with the second oil circuit, when rotary control valve provided by the invention is applied in rotary control system, first oil circuit that can control between two-way variable displacement pump and rotary motor by the mode of control second valve and the 3rd valve, whether be communicated with the second oil circuit.Simultaneously, braking valve in rotary control system provided by the invention can realize the control to the break for brake rotary motor, and then the function of emergency braking and free rotary can be realized by rotary control system, preferred version of the present invention can also realize the function of revolution buffering preferably.
Compared with prior art, in rotary control system for controlling the first oil circuit between two-way variable displacement pump with rotary motor, the rotary control valve that whether is communicated with the second oil circuit and the break oil circuit control whether braked for control brake relatively independent, thus reduce the impact of each several part fault on other functions, and then improve the reliability of system, so solve prior art to there is the poor technical problem of system reliability.Optimal technical scheme provided by the invention at least achieves following advantage:
1, in rotary control system provided by the invention, each oil circuit logical relation controls by controlling the opening and closing of associated solenoid valve, function precise control and realize convenient;
2, in rotary control system provided by the invention rotary control valve and break oil circuit control separate between the two, reduce each several part fault to the impact of other functions, the reliability of elevator system;
3, in rotary control valve, the second valve and the 3rd valve preferably adopt solenoid valve directly to control, timely to handle action response, can reach braking object timely and effectively for during emergency braking.
4, after Joystick returns meta, working connection adopts buffer overflow valve to realize turning round pooling feature in the mode of overflow, and cushioning effect is better, and facilitates adjustable.
5, revolution emergency braking, revolution buffering and free rotary function are integrated in one by this control valve;
6, adopt electromagnetic valve switch control logic to realize revolution emergency braking, revolution buffering and free rotary function, in time, not easily there is time delay in function precise control, response, and easy to maintenance.
7, buffer overflow valve mode is adopted to realize turning round pooling feature.The present invention adopts relief valve to cushion, the program is by buffering working connection pressure mode, and realize pressure when working connection pressure stops from pressure maximum slow releasing to action, buffering course is steady, and relevant with the factor such as rotating speed and rotary inertia, the revolution buffering under various operating mode can be realized.
8, by using the oil circuit control of cartridge valve 7 to realize revolution pooling feature, compact structure.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of a kind of hoist in prior art;
Fig. 2 is the schematic diagram of a kind of closed rotary control system in prior art;
Fig. 3 is the schematic diagram of another closed rotary control system in prior art;
Fig. 4 is the schematic diagram of the closed rotary control system applying rotary control valve in prior art;
The schematic diagram of the rotary control valve that Fig. 5 provides for embodiment of the present invention preferred implementation;
The schematic diagram of the rotary control system of the rotary control valve that Fig. 6 provides for application embodiment of the present invention preferred implementation;
Mark in figure: 1, slippage pump; 2, two-way variable displacement pump; 3, rotary motor; 4, Controlling solenoid valve; 5, rotary control valve; 51, solenoid valve; 52, selector valve; 53, solenoid valve; 54, cartridge valve; 6, break; 7, rotary control valve; 71, the first valve; A2, the first working connection port; B2, the second working connection port; X, oil circuit control port; 72, the second valve; 73, the 3rd valve; 74, relief valve; 751, the first one-way valve; 752, the second one-way valve; 76, shuttle valve; 8, braking valve; 9, one-way throttle valve; 10, external oil sources; 11, fuel tank; 12, break oil circuit control; 13, turntable rotating mechanism; 14, arm; 15, turntable; 161, the first oil circuit; 162, the second oil circuit.
Embodiment
Below by accompanying drawing Fig. 5 ~ Fig. 6 and the mode enumerating embodiment more of the present invention, technological scheme of the present invention (comprising optimal technical scheme) is described in further detail.It should be noted that: any technical characteristics in the present embodiment (can use comma between technical characteristics, fullstop, pause mark or branch etc. arbitrarily punctuation mark separate), any technological scheme is all one or more in the technical characteristics of plurality of optional or optional technological scheme, cannot exhaustive all alternative technical characteristicss of the present invention and alternative technological scheme in order to describe succinct to need in presents, also the mode of execution being not easy to each technical characteristics all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characteristics in the present embodiment and any technological scheme all do not limit the scope of the invention, protection scope of the present invention should comprise those skilled in the art and not pay the thinkable any alternate embodiments of creative work.
Embodiments provide a kind of system reliability good, revolution action not easily occur postpone, revolution stable action, the good rotary control valve of rotary control system reliability, the rotary control system of this rotary control valve is set and the hoist of this rotary control system is set.
Below in conjunction with the elaboration that Fig. 5 ~ Fig. 6 carries out specifically to technological scheme provided by the invention, the technological scheme of arbitrary technological means provided by the invention being carried out replacing or two or more technological means provided by the invention being carried out mutually combining and obtain all should within protection scope of the present invention.
As shown in figures 5 and 6, the rotary control valve 7 that the embodiment of the present invention provides, comprises the first valve (being preferably cartridge valve) the 71, second valve (being preferably two position four-way solenoid valves) 72 and the 3rd valve (being preferably 2/2-way solenoid valve) 73, wherein:
First valve 71 comprises the first working connection port A2, the second working connection port B2 and oil circuit control port X.
Second valve 72 comprises the first asphalt channel and the second asphalt channel.In this example the first asphalt channel be preferably the second valve 72 that is two position four-way solenoid valve dead electricity time the asphalt channel that formed, the second asphalt channel is preferably the asphalt channel that the second valve 72 is formed when that is two position four-way solenoid valves obtain electric.
When oil circuit control port X is connected with the first asphalt channel of the second valve 72, the first working connection port A2 is connected with the second working connection port B2.
When second valve 72 is in the first state (being preferably electric), the first valve 71 is connected with fuel tank 11 by the first asphalt channel.When second valve 72 is in the second state (being preferably dead electricity), the first valve 71 is connected with the 3rd valve 73 by the second asphalt channel.
When 3rd valve 73 is on state (be preferably dead electricity), the 3rd valve 73 is connected with the second asphalt channel of the second valve 72, the first working connection port A2 and the second working connection port B2 respectively.When 3rd valve 73 is in cut-off state (being preferably electric), the oil circuit between the second asphalt channel of the 3rd valve 73 and the second valve 72, the first working connection port A2 and the second working connection port B2 ends.
The rotary control valve 7 provided due to the embodiment of the present invention comprises the second valve 72 and the 3rd valve 73, oil circuit i.e. the first oil circuit 161 that the first working connection port A2 of the first valve 71 is communicated with the second working connection port B2 can be realized by switching to the second valve 72 and the 3rd valve 73 state (such as control its whether electric), the switching of the second oil circuit 162, the first oil circuit 161 can be controlled thus whether be communicated with the second oil circuit 162, when rotary control valve 7 provided by the invention is applied in rotary control system, first oil circuit 161 that can control between two-way variable displacement pump 2 and rotary motor 3 by the mode of control second valve 72 and the 3rd valve 73, whether be communicated with the second oil circuit 162.Simultaneously, braking valve 8 in rotary control system provided by the invention can realize the control to the break for brake rotary motor 3, and then the function of emergency braking and free rotary can be realized by rotary control system, preferred version of the present invention can also realize the function of revolution buffering preferably.
In rotary control system for controlling the first oil circuit 161 between two-way variable displacement pump 2 with rotary motor 3, the rotary control valve 7 that whether is communicated with the second oil circuit 162 and both the break oil circuit controls 12 for control brake relatively independent, thus reduce the impact of each several part fault on other functions, and then improve the reliability of system.
Optional or preferred embodiment as one, the second valve 72 and the 3rd valve 73 are all preferably solenoid valve.Solenoid valve not only takes up room little, and controls sensitivity, validity all better and realize convenient, is convenient to connect.Certainly, other valves are used with the technological scheme of replacement of solenoid valve also within protection scope of the present invention.
Optional or preferred embodiment, the first valve 71 is preferably cartridge valve as one.Cartridge valve takes up room little, uses cartridge valve that rotary control valve 7 structure can be made more compact.
Optional or preferred embodiment, this rotary control valve 7 also comprises relief valve 74 or damping member, preferably comprises relief valve 74 as one, wherein:
The filler opening of relief valve 74 or the filler opening of damping member are connected with the 3rd valve 73.
The oil outlet of relief valve 74 or the oil outlet of damping member are connected with the first working connection port A2 and the second working connection port B2 respectively.
Relief valve 74 and damping member all can play the effect of buffering at the hydraulic oil flowed out the first valve 71 oil circuit control port X, and then can improve the stability of whole hydraulic system.
Certainly, other elements are used with the technological scheme of alternative relief valve 74 or damping member also within protection scope of the present invention.
Optional or preferred embodiment, this rotary control valve 7 comprises relief valve 74 as one, this rotary control valve 7 also comprises the first one-way valve 751 and the second one-way valve 752, wherein:
First one-way valve 751 and the respective filler opening of the second one-way valve 752 are all connected with the oil outlet of relief valve 74.
The oil outlet of the first one-way valve 751 is connected with the first working connection port A2.
The oil outlet of the second one-way valve 752 is connected with the second working connection port B2.
The setting of the first one-way valve 751 and the second one-way valve 752 not only can play the effect of buffering to the hydraulic oil of the first valve 71 oil circuit control port X outflow, and hydraulic oil can be avoided in the first oil circuit 161, second oil circuit 162 to blow back into relief valve 74 or damping member.
Optional or preferred embodiment as one, this rotary control valve 7 also comprises shuttle valve 76, wherein: the oil outlet of shuttle valve 76 is connected with the second oil circuit 162 passage of the second valve 72 and the 3rd valve 73 respectively, two filler openings of shuttle valve 76 one of them be connected with the first working connection port A2, wherein another is connected with the second working connection port B2 two filler openings of shuttle valve 76.
Shuttle valve 76 can when the first oil circuit 161, second oil circuit 162 hydraulic fluid pressure be excessive, release portion hydraulic oil, thus the effect reaching buffering, and then contributes to the Stability and dependability of raising system.
As shown in figures 5 and 6, the rotary control system that the embodiment of the present invention provides comprises the rotary control valve 7 that two-way variable displacement pump 2, rotary motor 3, first oil circuit 161, second oil circuit 162, break 6, braking valve 8 and the arbitrary technological scheme of the present invention provide, wherein:
By the first oil circuit 161 and the second oil circuit 162, one of them is connected with the filler opening of rotary motor 3 oil outlet of two-way variable displacement pump 2, and by the first oil circuit 161, wherein another is connected with the oil outlet of rotary motor 3 filler opening of two-way variable displacement pump 2 with the second oil circuit 162.
Two-way variable displacement pump 2 is that the power fluid force feed driving rotary motor 3 to operate supplied by rotary motor 3 by the first oil circuit 161 or the second oil circuit 162.Two-way variable displacement pump 2 is by driving rotary motor 3 to operate to the mode of rotary motor 3 input power hydraulic oil.
First oil circuit 161 is connected with the first working connection port A2 of the first valve 71 in rotary control valve 7, and the second oil circuit 162 is connected with the second working connection port B2 of the first valve 71.
Braking valve 8(is preferably two position four-way solenoid valves) comprise the first hydraulic oil channel and the second hydraulic oil channel, the first hydraulic oil channel and the second hydraulic oil channel are the hydraulic oil channel that braking valve 8 is formed when being in different state (such as dead electricity, electric).When braking valve 8 is in the first state (two position four-way solenoid valve dead electricity), the rod chamber of break is connected with fuel tank 11 by the first hydraulic oil channel.Now, break implements braking maneuver to rotary motor 3.
When braking valve 8 is in the second state (two position four-way solenoid valves obtain electric), external oil sources 10 is connected with the rod chamber of break by the second hydraulic oil channel.Now, break is opened, and no longer implements braking maneuver to rotary motor 3.
In rotary control system provided by the invention, rotary control valve 5 is separate between the two with break oil circuit control 12, reduces the impact of each several part fault on other functions, so improve the reliability of system.
As shown in figures 5 and 6, the hoist that the embodiment of the present invention provides, comprises the rotary control system that the arbitrary technological scheme of turntable, Joystick and the present invention provides, wherein:
Joystick is connected with the second valve 72, the 3rd valve 73 and braking valve 8, and Joystick can switch the second valve 72, braking valve 8 when moving between the first state and the second state, and the 3rd valve 73 can be switched between on state and cut-off state.
Joystick is also referred to as crane rotation handle, it has three position: Zuo Wei, meta and right position, when Joystick is in left position, the turntable of hoist turns round toward left direction, and when Joystick is in right position, the turntable of hoist turns round toward right direction, when Joystick is in meta, the rotation of rotary table of hoist stops.The control to the second valve 72, the 3rd valve 73 and braking valve 8 can be realized by operating control handle.
The process of the control rotating platform of crane of the rotary control system in the hoist that the embodiment of the present invention provides is as follows:
1, when Joystick is opened, braking valve 8(is preferably two position four-way solenoid valves) must be electric, break 6 is opened; Meanwhile, the 3rd valve 73(is made to be preferably 2/2-way solenoid valve) must be electric, first valve 71(is preferably cartridge valve) close, the oil circuit cut-off between the first valve 71 first working connection port A2 and the second working connection port B2, now the turntable of hoist starts to do revolution action;
2, when hoist carries out revolution action, the second valve 72(is made to be preferably two position four-way solenoid valves) must be electric, make braking valve 8 power-off simultaneously, realize the revolution emergency braking of the turntable of hoist;
3, after Joystick returns meta, braking valve 8, the power-off simultaneously of the 3rd valve 73, break 6 slowly closing under the throttling action of one-way throttle valve 9; High pressure liquid force feed, by arriving buffer overflow valve 74 place through the 3rd valve 73 after shuttle valve 76, utilizes relief valve 74 to realize revolution pooling feature;
4, when braking valve 8, second valve 72 simultaneously electric time, the turntable of hoist can realize free rotary.
Certainly, the rotary control system that the arbitrary technological scheme of the present invention provides also can be applied on the Other Engineering vehicle outside hoist.
Arbitrary technological scheme disclosed in the invention described above unless otherwise stated, if the number range of it discloses, so disclosed number range is preferred number range, anyly it should be appreciated by those skilled in the art: preferred number range is only the numerical value that in many enforceable numerical value, technique effect is obvious or representative.Because numerical value is more, cannot be exhaustive, so the present invention just discloses component values to illustrate technological scheme of the present invention, and the above-mentioned numerical value enumerated should not form the restriction to the invention protection domain.
Simultaneously, if the invention described above discloses or relate to component or the structural member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can releasably be fixedly connected with (such as using bolt or screw to connect), also can be understood as: to be non-removablely fixedly connected with (such as rivet, weld), certainly, connection fastened to each other also can be replaced by integral type structure (such as use casting, forging or Shooting Technique is integrally formed creates) (obviously cannot adopt except integrally formed technique).
In addition, if there is term for representing position relationship or shape in arbitrary technological scheme disclosed in the invention described above, so the applied term for representing position relationship or shape unless otherwise stated its implication comprises approximate with it, similar or close state or shape.Arbitrary parts provided by the invention both can be assembled by multiple independent constituent element, and also can be one of the forming manufacture technics separate part out.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope of request of the present invention protection.
Claims (10)
1. a rotary control valve, is characterized in that, comprises the first valve, the second valve and the 3rd valve, wherein:
Described first valve comprises the first working connection port, the second working connection port and oil circuit control port, and described second valve comprises the first asphalt channel and the second asphalt channel;
When described oil circuit control port is connected with described first asphalt channel of described second valve, described first working connection port is connected with described second working connection port;
When described second valve is in the first state, described first valve is connected with fuel tank by described first asphalt channel; When described second valve is in the second state, described first valve is connected with described 3rd valve by described second asphalt channel;
When described 3rd valve is on state, described 3rd valve is connected with described second asphalt channel of described second valve, described first working connection port and described second working connection port respectively; When described 3rd valve is in cut-off state, the oil circuit between described second asphalt channel of described 3rd valve and described second valve, described first working connection port and described second working connection port ends.
2. rotary control valve according to claim 1, is characterized in that, described second valve and described 3rd valve are solenoid valve.
3. rotary control valve according to claim 1, is characterized in that, described second valve is two position four-way solenoid valves.
4. rotary control valve according to claim 1, is characterized in that, described 3rd valve is 2/2-way solenoid valve.
5. rotary control valve according to claim 1, is characterized in that, described first valve is cartridge valve.
6. rotary control valve according to claim 1, is characterized in that, this rotary control valve also comprises relief valve or damping member, wherein:
The filler opening of described relief valve or the filler opening of described damping member are connected with described 3rd valve;
The oil outlet of described relief valve or the oil outlet of described damping member are connected with described first working connection port and described second working connection port respectively.
7. rotary control valve according to claim 1, is characterized in that, this rotary control valve also comprises relief valve, wherein:
The filler opening of described relief valve is connected with described 3rd valve;
The oil outlet of described relief valve is connected with described first working connection port and described second working connection port respectively;
This rotary control valve also comprises the first one-way valve and the second one-way valve, wherein:
Described first one-way valve and described second one-way valve filler opening separately are all connected with the oil outlet of described relief valve;
The oil outlet of described first one-way valve is connected with described first working connection port;
The oil outlet of described second one-way valve is connected with described second working connection port.
8., according to the arbitrary described rotary control valve of claim 1-7, it is characterized in that, this rotary control valve also comprises shuttle valve, wherein:
The oil outlet of described shuttle valve is connected with described second asphalt channel of described second valve and described 3rd valve respectively, two filler openings of described shuttle valve one of them be connected with described first working connection port, wherein another is connected with described second working connection port two filler openings of described shuttle valve.
9. a rotary control system, is characterized in that, comprises the arbitrary described rotary control valve of two-way variable displacement pump, rotary motor, the first oil circuit, the second oil circuit, break, braking valve and claim 1-8, wherein:
By described first oil circuit and described second oil circuit, one of them is connected with the filler opening of described rotary motor the oil outlet of described two-way variable displacement pump, and by described first oil circuit, wherein another is connected with the oil outlet of described rotary motor the filler opening of described two-way variable displacement pump with described second oil circuit;
Described two-way variable displacement pump is the power fluid force feed that described rotary motor supply drives described rotary motor to operate by described first oil circuit or described second oil circuit;
Described first oil circuit is connected with the first working connection port of the first valve described in described rotary control valve, and described second oil circuit is connected with the second working connection port of described first valve;
Described braking valve comprises the first hydraulic oil channel and the second hydraulic oil channel, when described braking valve is in the first state, the rod chamber of described break is connected with fuel tank by described first hydraulic oil channel, when described braking valve is in the second state, external oil sources is connected with the rod chamber of described break by described second hydraulic oil channel.
10. a hoist, is characterized in that, comprises turntable, Joystick and rotary control system according to claim 9, wherein:
Described Joystick is connected with described second valve, described 3rd valve and described braking valve, and described Joystick can switch described second valve, described braking valve when moving between the first state and the second state, and described 3rd valve can be switched between on state and cut-off state.
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| CN201210581251.4A CN102996559B (en) | 2012-12-28 | 2012-12-28 | Rotary control valve, rotary control system and hoist |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103527536B (en) * | 2013-10-22 | 2016-08-17 | 中联重科股份有限公司 | Hydraulic motor governing system and speed regulating method, crane gear |
| CN103613011B (en) * | 2013-11-28 | 2015-07-22 | 徐州重型机械有限公司 | Autonomous control system for crane |
| CN103803443B (en) * | 2014-03-12 | 2016-06-29 | 徐州重型机械有限公司 | Crane and elevator braking control system thereof |
| CN112922912B (en) * | 2021-02-03 | 2022-04-12 | 山东大学 | Wave compensation type closed rotary hydraulic control system for marine trestle |
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