CN102126678B - Crane and super-lifting and tensioning control system and method thereof - Google Patents
Crane and super-lifting and tensioning control system and method thereof Download PDFInfo
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- CN102126678B CN102126678B CN 201010620507 CN201010620507A CN102126678B CN 102126678 B CN102126678 B CN 102126678B CN 201010620507 CN201010620507 CN 201010620507 CN 201010620507 A CN201010620507 A CN 201010620507A CN 102126678 B CN102126678 B CN 102126678B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
- B66C23/821—Bracing equipment for booms
- B66C23/823—Bracing equipment acting in vertical direction
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Abstract
The invention discloses a super-lifting and tensioning control system of a crane, comprising a tension device, a first detection device, a locking device and a control device, wherein, the tension device is used for tensioning a super-lifting device through a superlift winch; the first detection device is used for detecting the tensioning state of the tension device, and sending the obtained tensioning state signals; the locking device is used for locking the tension device; the control device is used for receiving the tensioning state signals and controlling the locking device according to the tensioning state signals; and the locking device comprises ratchet wheels coaxially and fixedly connected on the superlift winch, a track circumference of a groove of the ratchet wheel over against an axis, and an extension valve which can be connected in the groove in an insertion manner; when the tensioning state signals conforming to the preset value are received by the control device, a locking stop pin in the extension valve is commanded to extend out, and the superlift winch is commanded to stop operating after the locking stop pin extends out, and when the tensioning state signals conforming to the preset value are not received by the control device, the superlift winch is controlled to continuously operate.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of crane super lifting tensioning control system, a kind of hoisting crane and a kind of crane super lifting tensioning control method that comprises this crane super lifting tensioning control system.
Background technology
Along with the fast development of China's economic construction, market is for the particularly increasing demand increase of large-tonnage telescopic arm crane of telescopic arm crane.The camp site for the total arm length of telescopic arm crane, lifting altitude and play liter weight require increasingly highly, telescopic arm crane therefore commonly used just develops towards the direction that maximizes, maximization is an important design goal of telescopic arm crane.
Existing large-scale telescopic arm crane generally includes basic arm and the telescopic boom that can from this basic arm, stretch out; The basic arm length overall is longer, usually all greater than 50 meters, simultaneously; In order to make telescopic arm crane have the lifting altitude of bigger total arm length and Geng Gao; The brachium of telescopic boom is also more and more longer, can reach 20 meters～70 meters usually, and the deadweight of basic arm and telescopic boom is also increasing; On goliath, the weight of crane arm often accounts for more than 23% of complete machine weight.Thing followed problem is; Basic arm and telescopic boom brachium, the increase that arm is heavy; With making when hanging loads the stressing conditions of basic arm more and more abominable, the amount of deflection (be vertical amount of deflection and the transverse deflection of basic arm) of basic arm in luffing plane and plane of rotation is increasing.The total arm length of hoisting crane, lifting altitude and the maximum liter weight that rises all receive serious restriction.
To above problem, super lifting device is applied to hoister in large tonnage, super lifting device generally include surpassed mast, amplitude oil cylinder, surpassed elevator, hoist motor, take-up device, blocking device and control setup.Surpassed mast and be generally the cylinder with enough rigidity and intensity, its fixed end articulates through the basic arm of rotating shaft and hoisting crane usually, can rotate around this rotating shaft so that surpassed mast, has surpassed the determined plane of mast and basic arm and has been roughly vertical plane usually.Surpassed between mast and the basic arm and be provided with amplitude oil cylinder, the two ends of amplitude oil cylinder usually respectively with surpassed mast and basic arm is articulated, in the luffing plane, rotate with respect to basic arm to promote having surpassed mast.
Surpassed mast and had and the corresponding movable end of its fixed end, a take-up device has been set between the external part of this movable end and the arbitrary telescopic boom of hoisting crane; One end of this take-up device is connected with the movable end that has surpassed mast, and its other end can be connected with the external part of the arbitrary telescopic boom of hoisting crane, and this take-up device is used between the external part of movable end that has surpassed mast and telescopic boom, forming pulling force.The movable end that has surpassed mast is provided with and has surpassed elevator and driven the hoist motor that has surpassed elevator, and take-up device specifically is connected in this and has surpassed elevator.
Surpassed between the root of movable end and basic arm of mast and be provided with auxiliary take-up device, the two ends of this auxiliary take-up device are connected to the movable end that surpassed mast and the root of basic arm.Auxiliary take-up device has suitable length, so as to have surpassed mast should auxiliary take-up device after hoisting under the effect of luffing oil 2 can tensioning, thereby between the root of movable end that surpass mast and basic arm, form pulling force, assurance has surpassed mast and has not leaned forward.
When needing the lifting weight, surpass mast and can on the basic arm of hoisting crane, rising under the promotion of amplitude oil cylinder of super lifting device, and in the luffing plane, rotating around its fixed end, final to have surpassed mast and basic arm can cardinal principle perpendicular.Because take-up device is at telescopic boom and surpassed between the movable end of mast and apply pulling force; This pulling force can weight equalizer the part shearing force; Can significantly improve the strained condition of principal arm, and then significantly promote the performances such as total arm length, lifting altitude and a liter weight of telescopic arm crane.
Please refer to Fig. 1, Fig. 1 is the mounting structure scheme drawing of the blocking device in a kind of super lifting device of representative type hoisting crane.
A kind of representative type blocking device comprises hoist cylinder 01 and the locking cylinder 02 that articulates with this hoist cylinder 01, and blocking device adopts these two oil cylinder interoperations to accomplish the tensioning and the locking of super lifting device.Wherein hoist cylinder 01 is responsible for rising and falling of control lock locking oil cylinder 02; Locking cylinder 02 is responsible for having surpassed the locking action of elevator 04; The coaxial reel two ends that surpassed elevator 04 that are fixed on the hoist motor 05 have ratchet 03; The piston rod end that has surpassed locking cylinder 02 is connected with thick side's plate through bearing pin, and thick side's plate both sides all are equipped with semiaxis 021, are delivered on the ratchet 03 through the power of semiaxis 021 with oil cylinder.When needs have surpassed elevator 04 locking; Having surpassed locking cylinder 02 through hoist cylinder 01 control falls; Make in the groove of two semiaxis 021 synchronous insertion ratchets 03 on thick side's plate, withstand ratchet 03 then, avoid having surpassed elevator 04 and rotate; Thereby the locking that realization has surpassed elevator 04 prevents to have surpassed elevator 04 and under the effect of load, rotates.When needs have surpassed elevator 04 release, through 02 of hoist cylinder 01 control lock locking oil cylinder, make semiaxis 021 throw off the groove of ratchet 03, can freely rotate thereby surpassed elevator 04, realize release.The action of above-mentioned hoist cylinder 01, locking cylinder 02 and hoist motor 05 all is that the control through control setup realizes.
Blocking device adopts hoist cylinder 01 and locking cylinder 02 interoperation to accomplish the tensioning and the locking of super lifting device; Need the impression orbit detection of stretching full reduced state detection and ratchet 03 entirely of these two oil cylinders etc. in the control process; Detection signal is more; Control is complicated, occurs the situation in the groove that semiaxis 021 can not insert the ratchet 03 that has surpassed on the elevator 04 in the operating process easily.In addition, existing blocking device flexible control is difficulty comparatively, when hoist cylinder 01 drives locking cylinder 02 retraction, can bring impact to the ratchet on the elevator 03.
Therefore, how to improve super lifting device on this basis, make it have control simply, the locking accuracy rate is high, and tensioning realizes characteristics easily, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
First technical matters that the present invention will solve is for providing a kind of crane super lifting tensioning control system, and it is simple that this system has control, and the locking accuracy rate is high, and tensioning realizes characteristics easily.Second technical matters that the present invention will solve is that a kind of hoisting crane that comprises above-mentioned crane super lifting tensioning control system is provided.The 3rd technical matters that the present invention will solve is for providing a kind of crane super lifting tensioning control method, and it is simple that this method has control, and the locking accuracy rate is high, and tensioning realizes characteristics easily.
For solving above-mentioned first technical matters, the invention provides a kind of crane super lifting tensioning control system, comprising:
Take-up device carries out tensioning through the elevator that surpassed in the super lifting device of hoisting crane to said super lifting device;
First detecting device is used to detect the tensioning state of said take-up device, and sends the tensioning state signal that it obtains;
Blocking device is used to lock said take-up device;
Control setup is used to receive said tensioning state signal, and according to the said blocking device of said tensioning state signal control;
Said blocking device comprises that coaxial being fixed in saidly surpassed ratchet and axis on the elevator over against the track circumference of the groove of said ratchet and can be plugged in the flexible valve in the said groove;
When said control setup receives the said tensioning state signal that meets predetermined value, instruct the lock pin in the said flexible valve to stretch out, and stretching out the back instruction at said lock pin, said to have surpassed elevator out of service;
When said control setup does not receive the said tensioning state signal that meets predetermined value, control the said elevator that surpassed and continue operation.
Preferably, also comprise:
Second detecting device is used to detect the flexible state of said lock pin, and sends the flexible status signal that it obtains;
Said control setup is used to receive said flexible status signal, and judges that according to said flexible status signal said blocking device is in the lock state or released state;
When said blocking device was in said lock-out state, the instruction of said control setup is said, and to have surpassed elevator out of service;
When said blocking device was in said released state, the said elevator that surpassed of said control setup control continued operation.
Preferably, said flexible valve comprises valve body, lock pin and spring; Said valve body is provided with inner cavity chamber; The inner of said lock pin is nested in said inner cavity chamber, and its outer end can stretch out in said valve body from the opening of said inner cavity chamber; One end of said spring touches the inner to said lock pin, the other end touch to the inwall of the inner relative said inner cavity chamber of said lock pin; Said valve body is provided with oil inlet and oil outlet.
Preferably; The inner sidewall of said lock pin is provided with detection faces; Said second detecting device comprises and stretches out detector switch and shrink detector switch; Said detector switch and the said contraction detector switch of stretching out, the relevant position of the said detection faces when corresponding respectively to said lock pin and stretching out and shrink is provided with;
When said control setup receives the said signal that stretches out detector switch, judge that said blocking device is in said lock-out state;
When said control setup receives the signal of said contraction detector switch, judge that said blocking device is in said released state.
Preferably, the electromagnetic valve that also comprises said oil inlet of control and said oil outlet.
Preferably, said first detecting device is the sensor that is arranged on the said take-up device.
For solving above-mentioned second technical matters; The present invention also provides a kind of hoisting crane; Comprise basic arm, the telescopic boom that can from said basic arm, stretch out; With the super lifting device that is arranged on said basic arm and the said telescopic boom, said hoisting crane comprises above-described crane super lifting tensioning control system.
For solving above-mentioned the 3rd technical matters; The present invention also provides a kind of crane super lifting tensioning control method; The blocking device of said hoisting crane comprises that the coaxial ratchet that surpassed on the elevator and the axis of being fixed in is over against the track circumference of the groove of said ratchet and can be plugged in the flexible valve in the said groove; May further comprise the steps:
1) detects the tensioning state of take-up device in the super lifting device of said hoisting crane in real time;
2) judge whether said tensioning state reaches predetermined value, if not, then turn to step 31), if turn to step 32);
31) lock pin in the flexible valve of blocking device is in retracted mode in the super lifting device of the said hoisting crane of control, and moves the elevator that surpassed in the super lifting device of said hoisting crane;
32) the flexible valve of blocking device is in the state of stretching out in the super lifting device of the said hoisting crane of control, and execution in step 4 then);
4) said to have surpassed elevator out of service in instruction.
Preferably, said step 32) be specially:
321) in the super lifting device of said hoisting crane the lock pin in the flexible valve of blocking device (8 send and stretch out order;
322) state of the said lock pin of detection;
323) existing condition of judging said lock pin is for stretching out state or retracted mode, when the existing condition of said lock pin when stretching out state, execution in step 4), when the existing condition of said lock pin is retracted mode, then turn to step 321).
Crane super lifting tensioning control system provided by the invention, blocking device comprise that the coaxial ratchet that surpassed on the elevator and the axis of being fixed in is over against the track circumference of the groove of ratchet and can be plugged in the flexible valve in this groove; When control setup received the tensioning state signal that meets predetermined value, the lock pin in the flexible valve of instruction stretched out, and stretching out the back instruction at lock pin, to have surpassed elevator out of service; When control setup did not receive the tensioning state signal that meets predetermined value, control had surpassed elevator and has continued operation.
In the time need carrying out tensioning to the super lifting device of hoisting crane, startup has surpassed elevator take-up device has been carried out tensioning, and first detecting device detects the tensioning state of take-up device, and the tensioning state signal that is obtained is sent to control setup; When control setup received the tensioning state signal that meets predetermined value, the lock pin in the flexible valve of instruction stretched out, and lock pin stretches out the take-up device locking, and it is out of service that the control setup instruction has surpassed elevator, the tensioning success; When control setup did not receive the tensioning state signal that meets predetermined value, control had surpassed elevator and has continued operation, until the tensioning state that reaches predetermined value; After first detecting device detects this tensioning state, this tensioning state signal is sent to control setup, after control setup receives this tensioning state signal; Lock pin in the flexible valve of instruction stretches out; Lock pin stretches out the take-up device locking, and it is out of service that the control setup instruction has surpassed elevator, the tensioning success.
More than accomplish a working cycle, first detecting device detects the tensioning state of take-up device in real time, in the time need carrying out tensioning to the super lifting device of hoisting crane, promptly starts said procedure.
This shows that crane super lifting tensioning control system provided by the invention is with the axis of the lock pin on the flexible valve in the blocking device track circumference over against the groove of ratchet; And can be plugged in this groove; Through the stretching out and withdraw of lock pin, realize the locking and unlocking to take-up device, it is simple that this system has control; The locking accuracy rate is high, and tensioning realizes characteristics easily.
The hoisting crane that comprises above-mentioned crane super lifting tensioning control system provided by the present invention, and crane super lifting tensioning control method have similar technique effect with this crane super lifting tensioning control system, repeat no more at this.
Description of drawings
Fig. 1 is the mounting structure scheme drawing of the blocking device in a kind of super lifting device of representative type hoisting crane;
Fig. 2 is the structural representation of a kind of specific embodiment of crane super lifting tensioning control system provided by the present invention;
Fig. 3 is the partial left TV structure scheme drawing of Fig. 2;
Fig. 4 is the local detail enlarged diagram of Fig. 3;
Fig. 5 is the mounting structure scheme drawing of flexible valve in a kind of specific embodiment of crane super lifting tensioning control system provided by the present invention;
Fig. 6 is the part-structure cross-sectional schematic of a kind of specific embodiment of blocking device in the crane super lifting tensioning control system provided by the present invention;
Fig. 7 is the structural representation of a kind of specific embodiment of hoisting crane provided by the present invention;
Fig. 8 is the schematic flow sheet of a kind of specific embodiment of crane super lifting tensioning control method provided by the present invention;
Fig. 9 is the schematic flow sheet of the another kind of specific embodiment of crane super lifting tensioning control method provided by the present invention.
The specific embodiment
First core of the present invention is for providing a kind of crane super lifting tensioning control system, and it is simple that this system has control, and the locking accuracy rate is high, and tensioning realizes characteristics easily.Second core of the present invention is that a kind of hoisting crane that comprises above-mentioned crane super lifting tensioning control system is provided.The 3rd core of the present invention is for providing a kind of crane super lifting tensioning control method, and it is simple that this method has control, and the locking accuracy rate is high, and tensioning realizes characteristics easily.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2, Fig. 3, Fig. 4 and Fig. 5; Fig. 2 is the structural representation of a kind of specific embodiment of crane super lifting tensioning control system provided by the present invention; Fig. 3 is the partial left TV structure scheme drawing of Fig. 2; Fig. 4 is the local detail enlarged diagram of Fig. 3, and Fig. 5 is the mounting structure scheme drawing of flexible valve in a kind of specific embodiment of crane super lifting tensioning control system provided by the present invention.
In a kind of specific embodiment, crane super lifting tensioning control system provided by the present invention comprises: take-up device 5, carry out tensioning through the 9 pairs of super lifting devices of elevator that surpassed in the crane super lifting device; First detecting device 6 is used to detect the tensioning state of take-up device 5, and sends the tensioning state signal that it obtains; Blocking device 8 is used to lock take-up device 5; The control setup (not shown) is used to receive the tensioning state signal of first detecting device 6, and according to this tensioning state signal control blocking device 8.
Blocking device 8 comprises that the coaxial ratchet 82 that surpassed on the elevator 9 and the axis of being fixed in is over against the track circumference of the groove of ratchet 82 and can be plugged in the flexible valve 81 in this groove; When control setup received the tensioning state signal that meets predetermined value, the lock pin 812 in the flexible valve 81 of instruction stretched out, and stretching out the back instruction at lock pin 812, to have surpassed elevator 9 out of service; When control setup did not receive the tensioning state signal that meets predetermined value, control had surpassed elevator 9 and has continued operation.
The axis of flexible valve 81 as herein described refers to the axis of lock pin 812 in the flexible valve 81.Axis is over against the track circumference of the groove of ratchet 82, and the axis normal that had both comprised lock pin 812 also comprises the approximately perpendicular situation of wheel face of the axis and the ratchet 82 of lock pin 812 in the situation of the wheel face of ratchet 82.
In the super lifting device of hoisting crane, it is coaxial affixed with the output shaft of hoist motor usually to have surpassed elevator 9, and hoist motor is connected with HM Hydraulic Motor usually; Take-up device 5 is generally stay cord; The one of which end usually is connected with the external part of the telescopic boom 2 of hoisting crane, and its other end is wound in usually and has surpassed on the elevator 9, the rotation of fluid motor-driven hoist motor; The pulling force that has surpassed elevator 9 drive take-up devices 5 raises, and realizes tensioning function.
First detecting device 6 is used to detect the tensioning state of take-up device 5, and sends the tensioning state signal that it obtains; First detecting device 6 can send its detected all tensioning state signals, also can only send the tensioning state signal that meets predetermined value.
The tensioning state signal that meets predetermined value as herein described; Refer to take-up device 5 when reaching tensioning state; The pairing status signal of the value of thrust of take-up device 5, this status signal has certain scope usually, and this status signal can be set as required.
Control setup can receive whole tensioning state signals of first detecting device 6, and judges whether this tensioning state signal meets predetermined value, according to the kind instruction blocking device 8 and the action that has surpassed elevator 9 of the tensioning state signal after judging; Control setup also can receive only the tensioning state signal that meets predetermined value that first detecting device 6 sends, and according to whether receiving the tensioning state signal that this meets predetermined value, the action of instructing blocking device 8 and having surpassed elevator 9.
Surpassed mast 3 and can be provided with two usually, one of them movable end that has surpassed mast 3 can be used for being connected with an end of take-up device 5, and wherein another movable end that has surpassed mast 3 can be used for being connected with an end of auxiliary take-up device 5.The set-up mode that has surpassed mast 3 is not limited to this; Also can be provided with one and surpass mast 3; Be provided with two above that and surpassed elevator 9, one of them has surpassed elevator 9 and has been connected with an end of take-up device 5, and wherein another has surpassed elevator 9 and is connected with an end of auxiliary take-up device 5; Perhaps also can be other set-up mode.
The two ends that surpassed elevator 9 can be provided with side plate 91; The output shaft of hoist motor and this side plate 91 are articulated; This side plate 91 can be fixed in the movable end that has surpassed mast 3 usually; This side plate 91 can limit the position of the stay cord that is wound in the take-up device 5 that has surpassed elevator 9, and can the valve 81 that stretch be arranged on this side plate 91.The support 84 that flexible valve 81 is installed can be set, this support 84 can be fixed on the side plate 91, the valve 81 that will stretch is fixed on this support 84.
Blocking device 8 mainly comprises ratchet 82 and flexible valve 81; Ratchet 82 is with to have surpassed elevator 9 coaxial affixed; The peripheral part of ratchet 82 is along circumferentially being provided with groove; Flexible valve 81 is arranged on the track circumference of groove of ratchet 82, can inject each groove of ratchet 82 with the flexible end that guarantees flexible valve 81.
Can be provided with ratchet 82 at the two ends that surpassed elevator 9, can ratchet 82 be placed the inboard of side plate 91, on side plate 91, can be correspondingly provided with two flexible valves 81 that can be plugged in ratchet 82 grooves.Flexible valve 81 also can be wholely set, and the flexible valve 81 that is wholely set has two flexible ends.
Crane super lifting tensioning control system provided by the invention need be carried out following dead work usually before work: surpassed elevator 9 releases; Make and surpassed elevator 9 and be in quick condition; Be wound in the take-up device 5 that has surpassed elevator 9, after telescopic boom 2 reaches predetermined telescopic location, for reducing the distortion of telescopic boom 2 along with stretching out of telescopic boom 2; Improve the lift heavy performance, need before the lift heavy take-up device 5 tensionings and maintenance.At this moment crane super lifting tensioning control system provided by the invention is started working.
In the time need carrying out tensioning to the super lifting device of hoisting crane, startup has surpassed 9 pairs of take-up devices of elevator 5 and has carried out tensioning, and the tensioning state of 6 pairs of take-up devices 5 of first detecting device detects, and the tensioning state signal that is obtained is sent to control setup.
When control setup received the tensioning state signal that meets predetermined value, the lock pin 812 in the flexible valve 81 of instruction stretched out, and lock pin 812 stretches out take-up device 5 lockings, and it is out of service that the control setup instruction has surpassed elevator 9, the tensioning success.
When control setup did not receive the tensioning state signal that meets predetermined value, control had surpassed elevator 9 and has continued operation, until the tensioning state that reaches predetermined value; After first detecting device 6 detects this tensioning state, this tensioning state signal is sent to control setup, after control setup receives this tensioning state signal; Lock pin 812 in the flexible valve 81 of instruction stretches out; Lock pin 812 stretches out take-up device 5 lockings, and it is out of service that the control setup instruction has surpassed elevator 9, the tensioning success.
More than accomplish a working cycle, first detecting device 6 detects the tensioning state of take-up device 5 in real time, in the time need carrying out tensioning to the super lifting device of hoisting crane, promptly starts said procedure.
It is to be noted; When crane super lifting tensioning control system provided by the present invention is started working; After the completion of perhaps working reaches lock-out state; Amplitude oil cylinder 4 also is in the lock state, because the pulling force that take-up device 5 is born during lift heavy can reach tens tons, relies on the locking of blocking device 8 dangerous merely.This is the precondition of crane super lifting tensioning control system provided by the invention work.
This shows that crane super lifting tensioning control system provided by the invention is with the axis of the lock pin 812 on the flexible valve 81 in the blocking device 8 track circumference over against the groove of ratchet 82; And can be plugged in this groove; Through the stretching out and withdraw of lock pin 812, realize the locking and unlocking to take-up device 5, it is simple that this system has control; The locking accuracy rate is high, and tensioning realizes characteristics easily.
Need to prove that super lifting device does not under normal circumstances promptly carry out under the situation of tensioning, the locking and unlocking action, is protection super lifting device safety, super lifting device all is in the lock state.So, crane super lifting tensioning control system provided by the invention, the first step of work need be carried out release to having surpassed elevator 9.
Can surpass elevator 9 through control setup control earlier, give the direction delivery pressure that has surpassed 9 of elevators, remove the pressure of 82 pairs of flexible valves 81 of ratchet, reduce or removed the friction force of flexible valve 81 motions; Shrink from the groove of ratchet 82 through the flexible valve 81 of control setup control then, after the locking of the 8 pairs of take-up devices 5 of device that unlock, drive again and surpassed 9 pairs of take-up devices of elevator 5 and carry out tensioning.Be in order to prevent that having surpassed elevator 9 loses coupling mechanism force suddenly like this, cause the potential safety hazard that the power of take-up device 5 suddenly disappears and brings.
In the another kind of specific embodiment, crane super lifting tensioning control system provided by the present invention can be provided with second detecting device 83, is used for detecting the flexible state of the lock pin 812 of flexible valve 81, and sends the flexible status signal that it obtains; Control setup can receive this flexible status signal, and judges that according to this flexible status signal blocking device 8 is in the lock state or released state; When blocking device 8 was in the lock state, it is out of service that the control setup instruction has surpassed elevator 9; When blocking device 8 was in released state, control setup control had surpassed elevator 9 and has continued operation.
When the tensile force of take-up device 5 reached predetermined value, the flexible valve 81 of control setup instruction stretched out in the groove of ratchet 82, so that take-up device 5 is locked, at this moment, second detecting device 83 can be set, to detect the process of stretching out of flexible valve 81.
When second detecting device 83 detect flexible valve 81 stretch out state the time; This is stretched out status signal send to control setup, control setup receives after this stretches out status signal, judges that promptly blocking device 8 is in the lock state; It is out of service that the control setup instruction has surpassed elevator 9, and tensioning work is accomplished.
When second detecting device 83 detects the contraction state of flexible valve 81; This contraction state signal is sent to control setup, after control setup receives this contraction state signal, judge that promptly blocking device 8 is in released state; Control setup control has surpassed elevator 9 and has continued operation; Receive the contraction state signal that second detecting device 83 sends until control setup, control setup instructs just that surpass elevator 9 out of service, tensioning work completion.
The process of stretching out that 83 pairs of flexible valves 81 of second detecting device are set detects, and can further improve the reliability of this system works.
Please further with reference to figure 6, Fig. 6 is the part-structure cross-sectional schematic of a kind of specific embodiment of blocking device in the crane super lifting tensioning control system provided by the present invention.
About the concrete structure of flexible valve 81, in a kind of concrete embodiment, flexible valve 81 can comprise valve body, lock pin 812 and spring 813; Valve body can be provided with inner cavity chamber; The inner of pin shotpin can be nested in this inner cavity chamber, and its outer end can stretch out in valve body from the opening of this inner cavity chamber; One end of spring 813 can touch to the inner of lock pin 812, the other end can touch to the inwall of the inner relative inner cavity chamber of lock pin 812; Can be provided with oil inlet 814 and oil outlet 815 on the valve body.
The flexible valve 81 of this structure is driven by hydraulic pressure and spring 813 as the flexible of the flexible valve 81 flexible lock pins of holding 812, and through fluid control, the elastic force by spring 813 when stretching out provides power during lock pin 812 withdrawals.The flexible valve 81 of this set mode is simple in structure, reliable operation.
On the basis of the flexible valve 81 of this kind structure; Can be provided with detection faces 8121 by lock pin 812 inner sidewalls; Second detecting device 83 can comprise and stretches out detector switch 831 and shrink detector switch 832; Stretch out detector switch 831 and shrink detector switch 832, the relevant position setting of the detection faces 8121 when corresponding respectively to lock pin 812 and stretching out and shrinks; When control setup receives the signal that stretches out detector switch 831, judge that blocking device 8 is in the lock state; When control setup receives the signal that shrinks detector switch 832, judge that blocking device 8 is in released state.In this set mode, the flexible valve 81 and second detecting device 83 can be set to one, are provided with simple, easy to detect.
In the specific embodiment of above two kinds of flexible valves 81, the electromagnetic valve of control oil inlet 814 and oil outlet 815 can be set all.Control setup is through the oil circuit of solenoid control oil inlet 814 and oil outlet 815, with stretching out and contraction of further control lock shotpin 812.When needs carried out the tensioning of take-up device 5, the control setup electromagnetic valve of instruction was opened oil circuit, and lock pin 812 is withdrawn under the effect of oil circuit; After contraction detector switch 832 detects the contraction state signal; This contraction state signal is sent to control setup, and control setup thinks that promptly lock pin 812 withdraws successfully, and electromagnetic valve of instruction is closed oil circuit; To keep retracted mode; Do not detect the contraction state signal otherwise shrink detector switch 832, think that promptly lock pin 812 does not have withdrawal, and can not carry out next step action.
After lock pin 812 reached contraction state, control setup drove through oil circuit and has surpassed elevator 9 to playing the direction motion, and take-up device 5 is carried out tensioning.Take-up device 5 is carried out slack-free process, and the tensioning similar process with take-up device 5 in the previous embodiment repeats no more at this.It is simple that solenoid control is set, simple and easy to do.
In above each embodiment, first detecting device 6 can be for being arranged at the sensor on the take-up device 5.Through sensor being arranged on the take-up device 5,, simple and easy to do to realize the measuring ability of first detecting device 6.
Please refer to Fig. 7, Fig. 7 is the structural representation of a kind of specific embodiment of hoisting crane provided by the present invention.
The present invention also provides a kind of hoisting crane, comprises basic arm 1, the telescopic boom 2 that can from basic arm 1, stretch out and is arranged at the super lifting device on basic arm 1 and the telescopic boom 2, and this hoisting crane comprises above-described crane super lifting tensioning control system.Because this hoisting crane comprises above-described crane super lifting tensioning control system, its also corresponding technique effect with this crane super lifting tensioning control system repeats no more at this.
Please refer to Fig. 8, Fig. 8 is the schematic flow sheet of a kind of specific embodiment of crane super lifting tensioning control method provided by the present invention.
Except above-mentioned crane super lifting tensioning control system; And comprise beyond the hoisting crane of this system; The present invention also provides a kind of crane super lifting tensioning control method; The blocking device 8 of hoisting crane comprises that coaxial being fixed in surpassed ratchet 82 and axis on the elevator 9 over against the track circumference of the groove of ratchet 82 and can be plugged in the flexible valve 81 in this groove in the crane super lifting device; May further comprise the steps:
1) detects the tensioning state of take-up device 5 in the super lifting device of hoisting crane in real time;
2) judge whether this tensioning state reaches predetermined value, if not, then turn to step 31), if turn to step 32);
31) lock pin 812 in the flexible valve 81 of blocking device 8 is in retracted mode in the super lifting device of control hoisting crane, and has surpassed elevator 9 in the super lifting device of operation hoisting crane;
32) the flexible valve 81 of blocking device 8 is in the state of stretching out in the super lifting device of control hoisting crane, and execution in step 4 then);
4) to have surpassed elevator 9 out of service in instruction.
Further, step 32) can be specially:
321) lock pin 812 in the flexible valve 81 of blocking device 8 sends and stretches out order in the super lifting device of hoisting crane;
322) state of detection lock pin 812;
323) existing condition of judging lock pin 812 is for stretching out state or retracted mode, when the existing condition of lock pin 812 when stretching out state, execution in step 4), when the existing condition of lock pin 812 is retracted mode, then turn to step 321).
Crane super lifting tensioning control method provided by the present invention has similar technique effect with crane super lifting tensioning control system, repeats no more at this.
More than to hoisting crane provided by the present invention and surpassed the tensioning control system, method has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (9)
1. crane super lifting tensioning control system comprises:
Take-up device (5) carries out tensioning through the elevator (9) that surpassed in the super lifting device of hoisting crane to said super lifting device;
First detecting device (6) is used to detect the tensioning state of said take-up device (5), and sends the tensioning state signal that it obtains;
Blocking device (8) is used to lock said take-up device (5);
Control setup is used to receive said tensioning state signal, and according to the said blocking device of said tensioning state signal control (8);
It is characterized in that said blocking device (8) comprises that coaxial being fixed in saidly surpassed ratchet (82) and axis on the elevator (9) over against the track circumference of the groove of said ratchet (82) and can be plugged in the flexible valve (81) in the said groove;
When said control setup receives the said tensioning state signal that meets predetermined value, instruct the lock pin (812) in the said flexible valve (81) to stretch out, and stretching out the back instruction at said lock pin (812), said to have surpassed elevator (9) out of service;
When said control setup does not receive the said tensioning state signal that meets predetermined value, control the said elevator (9) that surpassed and continue operation.
2. crane super lifting tensioning control system according to claim 1 is characterized in that, also comprises:
Second detecting device (83) is used to detect the flexible state of said lock pin (812), and sends the flexible status signal that it obtains;
Said control setup is used to receive said flexible status signal, and judges that according to said flexible status signal said blocking device (8) is in the lock state or released state;
When said blocking device (8) when being in said lock-out state, said control setup instruction is said, and to have surpassed elevator (9) out of service;
When said blocking device (8) when being in said released state, said control setup control is said surpass elevator (9) continuation and to have moved.
3. crane super lifting tensioning control system according to claim 2 is characterized in that, said flexible valve (81) comprises valve body, lock pin (812) and spring (813); Said valve body is provided with inner cavity chamber; The inner of said lock pin (812) is nested in said inner cavity chamber, and the outer end of said lock pin (812) can stretch out in said valve body from the opening of said inner cavity chamber; One end of said spring (813) touches to the inner of said lock pin (812), the other end touch to the inwall of the inner relative said inner cavity chamber of said lock pin (812); Said valve body is provided with oil inlet (814) and oil outlet (815).
4. crane super lifting tensioning control system according to claim 3; It is characterized in that; The inner sidewall of said lock pin (812) is provided with detection faces (8121); Said second detecting device (83) comprises and stretches out detector switch (831) and shrink detector switch (832), said detector switch (831) and the said contraction detector switch (832) of stretching out, the relevant position setting of the said detection faces (8121) when corresponding respectively to said lock pin (812) and stretching out and shrink;
When said control setup receives the said signal that stretches out detector switch (831), judge that said blocking device (8) is in said lock-out state;
When said control setup receives the signal of said contraction detector switch (832), judge that said blocking device (8) is in said released state.
5. crane super lifting tensioning control system according to claim 4 is characterized in that, also comprises the electromagnetic valve of control said oil inlet (814) and said oil outlet (815).
6. according to each described crane super lifting tensioning control system of claim 1 to 5, it is characterized in that said first detecting device (6) is for being arranged at the sensor on the said take-up device (5).
7. hoisting crane; Comprise basic arm (1), the telescopic boom (2) that can from said basic arm (1), stretch out; With the super lifting device that is arranged on said basic arm and the said telescopic boom; It is characterized in that said hoisting crane comprises each described crane super lifting tensioning control system of claim 1 to 6.
8. crane super lifting tensioning control method; The blocking device of said hoisting crane (8) comprises that the coaxial ratchet (82) that surpassed on the elevator (9) and the axis of being fixed in is over against the track circumference of the groove of said ratchet (82) and can be plugged in the flexible valve (81) in the said groove; It is characterized in that, may further comprise the steps:
1) detects the tensioning state of take-up device (5) in the super lifting device of said hoisting crane in real time;
2) judge whether said tensioning state reaches predetermined value, if not, then turn to step 31), if turn to step 32);
31) lock pin (812) in the flexible valve (81) of blocking device (8) is in retracted mode in the super lifting device of the said hoisting crane of control, and moves and surpassed elevator (9) in the super lifting device of said hoisting crane;
32) the flexible valve (81) of blocking device (8) is in the state of stretching out in the super lifting device of the said hoisting crane of control, and execution in step 4 then);
4) said to have surpassed elevator (9) out of service in instruction.
9. crane super lifting tensioning control method according to claim 8 is characterized in that said step 32) be specially:
321) lock pin (812) in the flexible valve (81) of blocking device (8) sends and stretches out order in the super lifting device of said hoisting crane;
322) detect the state of said lock pin (812);
323) existing condition of judging said lock pin (812) is for stretching out state or retracted mode; When the existing condition of said lock pin (812) when stretching out state; Execution in step 4), when the existing condition of said lock pin (812) is retracted mode, then turn to step 321).
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