CN102190247A - Hydraulic pilot control system and hydraulic pilot crane provided with same - Google Patents

Hydraulic pilot control system and hydraulic pilot crane provided with same Download PDF

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Publication number
CN102190247A
CN102190247A CN2011101214076A CN201110121407A CN102190247A CN 102190247 A CN102190247 A CN 102190247A CN 2011101214076 A CN2011101214076 A CN 2011101214076A CN 201110121407 A CN201110121407 A CN 201110121407A CN 102190247 A CN102190247 A CN 102190247A
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CN
China
Prior art keywords
hydraulic pilot
control
handle
transduser
conductive
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Granted
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CN2011101214076A
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Chinese (zh)
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CN102190247B (en
Inventor
李丰
周斌
颜理
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Sany Automobile Hoisting Machinery Co Ltd
Sany Mobile Cranes Co Ltd
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Sany Mobile Cranes Co Ltd
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Priority to CN 201110121407 priority Critical patent/CN102190247B/en
Publication of CN102190247A publication Critical patent/CN102190247A/en
Application granted granted Critical
Publication of CN102190247B publication Critical patent/CN102190247B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a hydraulic pilot control system and a hydraulic pilot crane provided with the same. The hydraulic pilot control system comprises a plurality of main oilways, a plurality of control oilways, one or a plurality of hydraulic pilot handles, a master control electromagnetic valve and a plurality of position sensors, wherein the plurality of main oilways are respectively connected to corresponding execution mechanisms, and a main valve is arranged in each main oilway; a hydraulic pilot valve is arranged in each control oilway which is connected to one main valve; each hydraulic pilot handle is connected to the hydraulic pilot valve and respectively conducts the control oilway where one hydraulic pilot valve is in when the hydraulic pilot handle is in each conduction position state; the master control electromagnetic valve is connected with all the control oilways; each position sensor is used for sensing one conduction position state of the hydraulic pilot handles and triggering a handle position signal. By means of the hydraulic control system disclosed by the invention, the cost of the hydraulic control system is reduced, the manufacturing and installing time of wire harnesses for protecting the electromagnetic valve is shorted, and fault points are also reduced.

Description

Hydraulic pilot control system and be provided with the hydraulic pilot hoisting crane of this system
Technical field
The present invention relates to the fluid control field, relate in particular to a kind of hydraulic pilot control system and be provided with the hydraulic pilot hoisting crane of this system.
Background technology
At present, the little tonnage hoisting crane major part of the market mainstream is to adopt hydraulic way control, is exactly a kind of applications maturation, hoisting crane hydraulic control system widely as the control system of hydraulic pilot hoisting crane.As depicted in figs. 1 and 2, its core constituent elements is hydraulic pilot handle, main valve 1 ', hydraulic pilot valve 2 ' and corresponding protection electromagnetic valve 4 '.Wherein, each main valve 1 ' is arranged in every working connection, and the conducting meeting of every working connection makes the corresponding mechanics of hoisting crane carry out corresponding actions.Single hydraulic pilot handle can move to four direction in the plane, and produces four conduction position states.The hydraulic pilot handle is connected with hydraulic pilot valve 2 ', the hydraulic pilot handle when each conduction position state, the control oil channel at a place in the conducting hydraulic pilot valve 2 '; And each hydraulic pilot valve 2 ' is connected with a main valve 1 ' respectively, controls the action of this main valve 1 ', and then controls the conducting of corresponding working connection and end.Wherein the a1 ' among Fig. 1, a3 ', b1 ', b3 ' point is communicated with a1 ', a3 ', b1 ', b3 ' point among Fig. 2 respectively.Dotted line among Fig. 1 is represented control oil channel.
Four sense of motions of hydraulic pilot handle as shown in Figure 3, comprise+Y ,-Y ,+X and-the X four direction.Action from cooresponding hoisting crane to the direction motion of-Y that suppose hydraulic pilot handle is that elevator rises, this moment, the fluid control principle of hoisting crane was: the hydraulic pilot handle is when the motion of-Y direction, the control oil channel of conducting-Y direction, on valve core of main valve, produced a difference of pressure this moment, therefore spool produces displacement under this pressure effect, corresponding working connection conducting, crane hoisting plays action.Its excess-three of hydraulic pilot handle direction action principle of work is identical therewith.Because hoisting crane can produce dangerous operating mode unavoidably in artificial nonstandard operation; therefore promptly will be when making dangerous play to the people; as produce (just sensor senses is behind height spacing alarm signal) behind the height spacing alarm, utilize the control handle handle of the output control of controller or circuit to continue to make protection and handle to avoid dangerous and take place to the motion of-Y direction.The mode that this protection is handled is generally increases a protection electromagnetic valve by controller control on the control oil channel of guide's handle; as shown in Figure 2; after the controller judgement of just above-mentioned connection protection electromagnetic valve 4 ' is about to occur dangerous operating mode; thereby this protection electromagnetic valve outage is cut off the hydraulic pilot handle in the control oil channel that this side up, reach the action protection of handle on this direction.
Because hoisting crane generally has two hydraulic pilot handles, therefore generally have the handle action of eight directions at least, therefore on control oil channel, need eight protection electromagnetic valves to carry out middle action at least and handle the safety guard-safeguard that can keep relevant action.This shows; this protected mode has caused a higher hydraulic control system cost; the assembling of hydraulic tubing, the making and the set-up time of protection electromagnetic valve wire harness have been prolonged; also increased the pin resource occupation of controller; increase the trouble point in the hoisting crane use simultaneously, also be unfavorable for the malfunction elimination in the past-sale service process.
Summary of the invention
The hydraulic pilot hoisting crane that technical matters to be solved by this invention provides a kind of hydraulic pilot control system and is provided with this system can significantly reduce the number of protecting electromagnetic valve, reduces the cost of control system, has simplified control system.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of hydraulic pilot control system, comprising: many working connections, be connected to cooresponding actuating unit respectively, be respectively arranged with a main valve in every working connection; Many control oil channel wherein are respectively arranged with a hydraulic pilot valve in every control oil channel; Every control oil channel is connected in the main valve, the conducting of control main valve with end; One or more hydraulic pilot handles, wherein each hydraulic pilot handle is connected to a plurality of hydraulic pilot valves, and has a plurality of conduction position states; When each hydraulic pilot handle is in each conduction position state, the control oil channel at a place in the difference conducting hydraulic pilot valve, this hydraulic pilot control system also comprises the master control electromagnetic valve, connects all control oil channel; A plurality of position transdusers, each position transduser are used for a conduction position state of sensing hydraulic pilot handle, and trigger the handle position signal; And electrical controller, be connected with the danger signal sensor that is provided with on the actuating unit, and be connected with the master control electromagnetic valve with position transduser, when the handle position signal of danger signal that receives the danger signal sensor and corresponding position transduser, control master control closed electromagnetic valve.
Further, position transduser is arranged on the hydraulic pilot handle.
Further, position transduser is a pressure sensor, is arranged in each bar control oil channel, in order to detect the oil pressure in each bar control oil channel.
Further, comprise also and all control oil channel bonded assembly overhead control oil circuits that the master control electromagnetic valve is arranged in the overhead control oil circuit.
Further, electrical controller also comprises controller, this controller have with each position transduser bonded assembly input pin and with master control electromagnetic valve bonded assembly output pin.
Further, each position transduser comprises: first conductive part; Second conductive part is provided with at interval with first conductive part; And interconnecting part; When the hydraulic pilot handle is in a conduction position state, contact first conductive part and second conductive part simultaneously with moving of hydraulic pilot handle corresponding to the interconnecting part in the position transduser of this conduction position state.
Further, first conductive part and second conductive part all are fixed on the handle base of hydraulic pilot handle below; Interconnecting part is connected on the handle base of hydraulic pilot handle below by spring; Position transduser also comprises triggering portion, be arranged on the hydraulic pilot handle, when the hydraulic pilot handle is in a conduction position state, relative trigger portion with moving of hydraulic pilot handle with length of spring compressed, so that interconnecting part contacts first conductive part and second conductive part simultaneously.
According to a further aspect in the invention, also provide a kind of hydraulic pilot hoisting crane, it comprises the control system of above-mentioned any hydraulic pilot hoisting crane.
The present invention has following beneficial effect:
Comprise the master control electromagnetic valve that connects all control oil channel in the hydraulic pilot control system of the present invention; also be provided with the position transduser of the conduction position state that is used for sensing hydraulic pilot handle simultaneously; like this; after the action of the pairing mechanics of conducting of a certain working connection produces warning or danger; producing pulleying when for example crane hoisting plays action reports to the police; if at this moment the conduction position state that is in to the hydraulic pilot handle of position sensors sense is the conducting corresponding to the hydraulic pilot valve in the pairing control oil channel of working connection of hoisting crane action; the just artificial operation hydraulic pilot handle that continues carries out the action of the hoisting crane of dangerous direction; then controller in the system or control circuit can cut off the power supply of above-mentioned master control electromagnetic valve, protect.That is to say, by the cooperation of above-mentioned position transduser and master control electromagnetic valve, can realize control that dangerous play is limited, and need not in each bar control oil channel, all to be provided with a protection electromagnetic valve.Like this, just reduce the cost of hydraulic control system, reduced the wire harness of protection electromagnetic valve and made and the set-up time, also reduced the required trouble point of control system.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.With reference to figure, the present invention is further detailed explanation below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the scheme drawing of control oil channel in the hydraulic pilot control system of prior art;
Fig. 2 is the scheme drawing of working connection in the hydraulic pilot control system of prior art, shows the part control oil channel among the figure in the lump;
Fig. 3 is the sense of motion scheme drawing of hydraulic pilot handle in the hydraulic pilot control system;
Fig. 4 is the structural representation according to hydraulic pilot handle in the hydraulic pilot control system of the first embodiment of the present invention;
Fig. 5 is the scheme drawing according to the control oil channel of the hydraulic pilot control system of the first embodiment of the present invention;
Fig. 6 is the scheme drawing according to the working connection of the hydraulic pilot control system of the first embodiment of the present invention, shows the part control oil channel among the figure in the lump;
Fig. 7 is according to the control relation block diagram between the each several part in the hydraulic pilot control system of the first embodiment of the present invention;
Control process figure when Fig. 8 is to use and according to the hydraulic pilot control system of the first embodiment of the present invention hydraulic pilot hoisting crane is controlled.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Hydraulic pilot control system according to the first embodiment of the present invention comprises: one or more hydraulic pilot handle 3, many control oil channel as shown in Figure 5, many working connections as shown in Figure 6 as shown in Figure 4.As can see from Figure 6, be respectively arranged with a main valve 1 in every working connection.In addition, every working connection is connected to cooresponding actuating unit respectively, and actuating unit is provided with the danger signal sensor, the action of sensing actuating unit, and when the action of actuating unit produces danger, send distress signal.As can see from Figure 5, be respectively arranged with a hydraulic pilot valve 2 in every control oil channel; Every control oil channel is connected in the main valve 1, control main valve 1 conducting with end, particularly, four control oil channel a1, a3 among Fig. 5, b1, b3 are communicated with control oil channel a1, a3, b1, b3 among Fig. 6 respectively, realize the control of each hydraulic pilot valve 2 to each main valve 1.Be appreciated that the corresponding control oil channel that only shows four working connections among Fig. 6 among Fig. 5, other working connections are controlled by the control oil channel identical with control oil channel among Fig. 5 too.Each hydraulic pilot handle is connected to a plurality of hydraulic pilot valves 2; Return Fig. 4, can see, each hydraulic pilot handle 3 has a plurality of conduction position states, for example conducting state of A direction.When each hydraulic pilot handle 3 is in each conduction position state, the control oil channel at a place in the difference conducting hydraulic pilot valve 2.In the present embodiment, the hydraulic pilot control system comprises two hydraulic pilot handles 3, each hydraulic pilot handle 3 has four conduction position states, control oil channel a1, the a3 in four conduction position states difference corresponding diagram 5 of one of them hydraulic pilot handle 3, the conducting of the hydraulic pilot valve 2 among b1, the b3.In addition, among the present invention, as shown in Figure 5, this hydraulic pilot control system also comprises master control electromagnetic valve 4, a plurality of position transduser 31 and electrical controller (not shown).This master control electromagnetic valve 4 connects all control oil channel.Each position transduser 31 is used for a conduction position state of sensing hydraulic pilot handle 3, and triggers the handle position signal.The danger signal sensor that is provided with on electrical controller and the above-mentioned corresponding bonded assembly actuating unit with working connection is connected, and be connected with master control electromagnetic valve 4 with position transduser 31, when the handle position signal of danger signal that receives the danger signal sensor and corresponding position transduser, control master control electromagnetic valve 4 is closed.
Be appreciated that; when the action of the pairing actuating unit of conducting of a certain working connection in this hydraulic pilot control system produce report to the police or danger after; with the hydraulic pilot hoisting crane is example; when for example the hoisting crane of hydraulic pilot hoisting crane moves; corresponding danger signal sensor produces pulleying and reports to the police; if at this moment to sense the conduction position state that hydraulic pilot handle 3 is in be conducting corresponding to the hydraulic pilot valve 2 in the pairing control oil channel of working connection of hoisting crane action to position transduser 31; just position transduser 31 detects artificial action and continues the action that operation hydraulic pilot handle 3 attempts to carry out the hoisting crane of dangerous direction; then the electrical controller in the system (as controller or control circuit) can cut off the power supply of above-mentioned master control electromagnetic valve 4, protects.That is to say; cooperation by above-mentioned danger signal sensor, position transduser 31 and master control electromagnetic valve 4; can realize control that dangerous play is limited, and need not in each bar control oil channel, all to be provided with a protection electromagnetic valve, with the break-make of each bar control oil channel of independent control.Like this, just reduced the cost of hydraulic component and the cost of hydraulic control system, reduced the wire harness of protection electromagnetic valve and made and the set-up time, also reduced the required trouble point of control system, the malfunction elimination during for past-sale service provides convenient.
Can find out connection and control relation between this hydraulic pilot control system various piece more intuitively by Fig. 7.As shown in Figure 7, master control electromagnetic valve 4 and hydraulic pilot valve 2 all are connected to control oil channel, and particularly, master control electromagnetic valve 4 is connected to all control oil channel controlling the break-make of all control oil channel, and each hydraulic pilot valve 2 is separately positioned in the control oil channel.Control oil channel is connected to the main valve 1 in the working connection, and particularly, each main valve 1 is separately positioned in the working connection.Every working connection is connected to cooresponding actuating unit respectively.Be provided with and electrical controller bonded assembly danger signal sensor on the actuating unit, cause danger the back corresponding danger signal of generation to electrical controller in the action that senses actuating unit.In addition, hydraulic pilot handle 3 is connected with hydraulic pilot valve 2, the opening and closing of modulated pressure priority valve 2, hydraulic pilot handle 3 is provided with and electrical controller bonded assembly position transduser 31, each position transduser 31 is used for a conduction position state of sensing hydraulic pilot handle 3, and trigger the handle position signal, the handle position signal is sent to electrical controller.Electrical controller also is connected with master control electromagnetic valve 4, and when the handle position signal of danger signal that receives the danger signal sensor and corresponding position transduser, control master control electromagnetic valve (4) is closed, to protect.
In addition, from above as can be known, because the existence of position transduser 31, the operating state of the hydraulic pilot handle 3 among the present invention can read, if use the signal of controller receiving position sensor 31, after dangerous operating mode occurring, if operating personal imperative operation corresponding actions, controller can write down the course of action of hydraulic pilot handle 3.Like this, if safety misadventure occurs, can judge accident liability side easily by above-mentioned record.
This control system is that with respect to the difference of original control system mode in use the control process of former control system is a kind of process of static state; with the control hoisting crane is example; as after producing the pulleying warning; electrical controller then cuts off the handle pulleying and moves the protection power of electromagnetic valve of pairing single control oil channel; and the control process of the control system among the present invention is after hoisting crane is producing warning; have only the hydraulic pilot handle to continue when the dangerous play direction is moved, just to cut off the power supply of the master control electromagnetic valve 4 of all control oil channel; otherwise hoisting crane still can normal operation; do not influence the use of all the other actions, dual mode control effect is similar.
As shown in Figure 4, in the present embodiment, position transduser 31 is arranged on the hydraulic pilot handle 3.Can be the sensor of any ways such as proximity transducer of the action of sensing hydraulic pilot handle 3.Position transduser is arranged on the handle, easily the location status of sensing handle.
Perhaps preferably, in practice, position transduser 31 also can be pressure sensor, is arranged in each bar control oil channel, in order to detecting the oil pressure in each bar control oil channel, and then judges the conduction position state of hydraulic pilot handle 3 indirectly.
Preferably, as shown in Figure 5, in the present embodiment, the hydraulic pilot control system comprises also and all control oil channel bonded assembly overhead control oil circuits that master control electromagnetic valve 4 is arranged in the overhead control oil circuit.The master control electromagnetic valve 4 that is arranged so that of this overhead control oil circuit is connected to all oil circuits easily.
Preferably, in the present embodiment, electrical controller comprises the controller (not shown), this controller have with each position transduser 31 bonded assembly input pins and with master control electromagnetic valve 4 bonded assembly output pins.Like this; the alerting signal that this controller can produce according to the action from the pairing mechanics of conducting of each working connection in each position transduser 31 sensed signal and this hydraulic pilot control system is controlled in good time and is closed master control electromagnetic valve 4; control protection, prevent that operating personal from carrying out maloperation and the generation accident at unsafe condition to the hydraulic pilot handle.
Preferably, in the present embodiment, as shown in Figure 4, each position transduser 31 comprises: first conductive part 311, second conductive part 312 and interconnecting part 313.Wherein, second conductive part 312 and first conductive part 311 are provided with at interval.When hydraulic pilot handle 3 is in a conduction position state, contact first conductive part 311 and second conductive part 312 of this position transduser 31 simultaneously with moving of hydraulic pilot handle 3 corresponding to the interconnecting part 313 in the position transduser 31 of this conduction position state.Such first conductive part 311 and second conductive part 312 promptly are communicated with, during practical application, the 24V+ signal that can for example the signal wire (SW) 315 at first conductive part, 311 places be connected the 24V power supply, and second conductive part 312 is connected to a switching value input pin of controller, when first conductive part 311 and 312 connections of second conductive part, this switching value input pin of controller receives has the 24V+ signal.This sensor construction is simple, and is easy for installation.Certainly, in actual applications, can also use for example sensor of any type of suitable detection handle position such as proximity transducer.
In the present embodiment, first conductive part 311 and second conductive part 312 all are fixed on the handle base of hydraulic pilot handle 3 belows; Interconnecting part 313 is connected on the handle base of hydraulic pilot handle 3 belows by spring, and spaced apart with first conductive part 311 and second conductive part 312.As shown in Figure 4, position transduser 31 also comprises triggering portion 314, this triggering portion 314 is arranged on the hydraulic pilot handle, when hydraulic pilot handle 3 is in a conduction position state, relative trigger portion 314 with moving of hydraulic pilot handle 3 with length of spring compressed, so that interconnecting part 313 contacts first conductive part 311 and second conductive part 312 simultaneously.Utilize the cooperation of triggering portion 314 and spring, realize that interconnecting part 313 is communicated with first conductive part 311 and second conductive part 312, this is simple for structure.
According to another aspect of the present invention, also provide a kind of hydraulic pilot hoisting crane, this hydraulic pilot hoisting crane comprises above-mentioned any hydraulic pilot control system.From above as can be known, the control system cost of this hydraulic pilot hoisting crane is lower, has reduced the wire harness of protection electromagnetic valve and has made and the set-up time, has also reduced the required trouble point of control system, and the malfunction elimination during for past-sale service provides convenient.
Certainly, the field of application of the hydraulic pilot control system among the present invention is not limited to the hydraulic pilot hoisting crane, and other various mechanical equipments that use hydraulic pilot system of the present invention and hydraulic pilot handle thereof to control all fall within the scope of the present invention.
In the present embodiment, choose the hydraulic pilot hoisting crane, pulleying, cross and put, overload when taking place, the control process when using hydraulic pilot control system of the present invention that it is controlled in three kinds of dangerous operating modes of easy appearance.As shown in Figure 7, this control process may further comprise the steps:
Step S101: open hoisting crane.
Step S102: the master control electromagnetic valve gets.Particularly, after the normal unlatching of hoisting crane, master control electromagnetic valve 4 gets electric and opens, thereby all control oil channel can not ended, hoisting crane is in normal working, can and then control the conducting of each bar control oil channel and each bar working connection and end by modulated pressure guide handle 3, and then the corresponding various actions of control hoisting crane.
Step S103: dangerous operating mode is judged.Particularly, be example with the situation that is provided with controller in the crane control system, report to the police if produce when hoisting crane moves, just controller receives alerting signal, and then controller is judged the kind of dangerous operating mode according to alerting signal.
1. if alerting signal is reported to the police for the hoisting crane pulleying, then enter step S104a: dangerous play 1 is judged.Particularly, this dangerous play 1 is judged, and corresponding crane hoisting that whether be the decision operation personnel make hydraulic pilot handle 3 be in to the direction of operating of handle plays the conduction position of action, just, if operating personal operation hydraulic pilot handle 3, make it to be in hydraulic pilot valve 2 conductings on the control oil channel that makes the crane hoisting action, and then the conduction position of the working connection conducting of corresponding elevator action, the position transduser 31 on the then corresponding conduction position can trigger corresponding handle position signal.If controller receives this corresponding handle position signal, then the result of this dangerous play 1 judgement is a "Yes"; If controller does not receive this corresponding handle position signal, then the result of this dangerous play 1 judgement is a "No".
If judged result is a "Yes", then enter step S105: master control electromagnetic valve dead electricity.All control oil channel are ended like this, and the action that corresponding crane hoisting rises promptly is prevented from.Of course it is to be understood that if operating personal modulated pressure guide handle 3 is to all the other conduction positions actions at this moment, then respective roll kick up the action the handle position blackout, the judged result of dangerous play 1 becomes "No", and the master control electromagnetic valve gets electric, and hoisting crane can also carry out other actions.
2. if alerting signal is that overload crane is reported to the police, then enter step S104c: dangerous play 3 is judged.Particularly, this dangerous play 3 is judged, and corresponding crane amplitude variation that whether be the decision operation personnel make hydraulic pilot handle 3 be in to the direction of operating of handle falls, big arm is stretched and is waited any one to increase the conduction position of the action of moment percentum, just, if operating personal operation hydraulic pilot handle 3, make it to be in hydraulic pilot valve 2 conductings on the control oil channel of the action that makes hoisting crane increase the moment percentum, and then the conduction position of the working connection conducting of the action of corresponding increase moment percentum, the position transduser 31 on the then corresponding conduction position can trigger corresponding handle position signal.If controller receives this corresponding handle position signal, then the result of these dangerous play 3 judgements is a "Yes"; If controller does not receive this corresponding handle position signal, then the result of these dangerous play 3 judgements is a "No".
If judged result is a "Yes", then enter step S105: master control electromagnetic valve dead electricity.All control oil channel are ended like this, and the action that corresponding hoisting crane increases the moment percentum promptly is prevented from.Of course it is to be understood that if operating personal modulated pressure guide handle 3 is to all the other conduction positions actions at this moment, then respective roll kick up the action the handle position blackout, the judged result of dangerous play 3 becomes "No", and the master control electromagnetic valve gets electric, and hoisting crane can also carry out other actions.
3. if alerting signal is that hoisting crane is crossed and put warning, then enter step S104b: dangerous play 2 is judged.Concrete judgement and control process and aforementioned two kinds of processes are similar, do not repeat them here.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. hydraulic pilot control system comprises:
Many working connections are connected to cooresponding actuating unit respectively, are respectively arranged with a main valve (1) in every described working connection;
Many control oil channel, wherein
Be respectively arranged with a hydraulic pilot valve (2) in every described control oil channel;
Every described control oil channel is connected in the described main valve (1), the conducting of controlling described main valve (1) with end;
One or more hydraulic pilot handles (3), wherein
Each described hydraulic pilot handle (3) is connected to a plurality of described hydraulic pilot valves (2), and has a plurality of conduction position states;
When each described hydraulic pilot handle (3) is in each conduction position state, the control oil channel at a place in the difference described hydraulic pilot valve of conducting (2),
It is characterized in that, also comprise:
Master control electromagnetic valve (4) connects all described control oil channel;
A plurality of position transdusers (31), each described position transduser (31) is used for a conduction position state of the described hydraulic pilot handle of sensing (3), and triggers the handle position signal; And
Electrical controller, be connected with the danger signal sensor that is provided with on the described actuating unit, and be connected with described master control electromagnetic valve (4) with described position transduser (31), when the handle position signal of danger signal that receives described danger signal sensor and corresponding described position transduser, control described master control electromagnetic valve (4) and close.
2. hydraulic pilot control system according to claim 1 is characterized in that, described position transduser (31) is arranged on the described hydraulic pilot handle (3).
3. hydraulic pilot control system according to claim 1 is characterized in that, described position transduser (31) is a pressure sensor, is arranged in described each bar control oil channel, in order to detect the oil pressure in described each bar control oil channel.
4. hydraulic pilot control system according to claim 1 is characterized in that, comprises also and all described control oil channel bonded assembly overhead control oil circuits that described master control electromagnetic valve (4) is arranged in the described overhead control oil circuit.
5. hydraulic pilot control system according to claim 1, it is characterized in that, described electrical controller comprises controller, described controller have with each described position transduser (31) bonded assembly input pin and with described master control electromagnetic valve (4) bonded assembly output pin.
6. hydraulic pilot control system according to claim 2 is characterized in that,
Each described position transduser (31) comprising:
First conductive part (311);
Second conductive part (312) is provided with at interval with described first conductive part (311); And
Interconnecting part (313);
When described hydraulic pilot handle (3) is in a conduction position state, contact first conductive part (311) and second conductive part (312) simultaneously with moving of described hydraulic pilot handle (3) corresponding to the interconnecting part (313) in the described position transduser (31) of this conduction position state.
7. hydraulic pilot control system according to claim 6 is characterized in that,
Described first conductive part (311) and described second conductive part (312) all are fixed on the handle base of described hydraulic pilot handle (3) below;
Described interconnecting part (313) is connected on the handle base of described hydraulic pilot handle (3) below by spring;
Described position transduser (31) also comprises triggering portion (314), be arranged on the described hydraulic pilot handle (3), when described hydraulic pilot handle (3) is in a conduction position state, corresponding described triggering portion (314) with moving of described hydraulic pilot handle (3) with described length of spring compressed, so that described interconnecting part (313) contacts described first conductive part (311) and described second conductive part (312) simultaneously.
8. a hydraulic pilot hoisting crane is characterized in that, comprises the control system of any one the described hydraulic pilot hoisting crane among the claim 1-7.
CN 201110121407 2011-05-11 2011-05-11 Hydraulic pilot control system and hydraulic pilot crane provided with same Expired - Fee Related CN102190247B (en)

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CN102862456B (en) * 2012-09-26 2015-03-04 中联重科股份有限公司 Suspension system, switching-on/off control system and detection method thereof
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CN103612988B (en) * 2013-11-29 2015-05-20 大连元利流体技术有限公司 Air-controlled return circuit of semiautomatic delivery system

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