WO2013155821A1

WO2013155821A1 - Method and apparatus for controlling super-lifting system, super-lifting system and engineering machinery

Info

Publication number: WO2013155821A1
Application number: PCT/CN2012/082283
Authority: WO
Inventors: 詹纯新; 刘权; 刘永赞; 郭纪梅; 蒋应龙; 陈海霞; 龙治国
Original assignee: 中联重科股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2012-04-19
Filing date: 2012-09-28
Publication date: 2013-10-24
Also published as: CN102633190A; CN102633190B

Abstract

Disclosed is a method for controlling a super-lifting system. The method comprises: detecting whether or not a piston rod of a locking oil cylinder (51) has been retracted to a first set position; if it is detected that the piston rod has not been retracted to the first set position, executing a locking oil cylinder (51) retraction operation such that the piston rod of the locking oil cylinder (51) is retracted; if it is detected that the piston rod has already been retracted to the first set position, executing an unlocking oil cylinder (52) extension operation such that the piston rod of the unlocking oil cylinder (52) is extended and executing a cable winding operation on a super-lifting winch (55); and when the piston rod of the unlocking oil cylinder (52) is extended to a second set position, stopping the extension operation on the unlocking oil cylinder (52) and stopping the cable winding operation on the super-lifting winch (55). Further disclosed are an apparatus for controlling a super-lifting system, a control system and engineering machinery. The invention enables automatic locking and unlocking of the super-lifting system, reducing dependency on manual operations.

Description

Control method and device for super-lifting system, super-starting system and engineering machinery

Technical field

The present invention relates to the field of construction machinery, and in particular to a control method and control apparatus for a super-lift system. Background technique

With the rapid development of the social economy, the crane products are getting larger and larger, and the lifting performance requirements are getting higher and higher. In order to fundamentally improve the lifting performance, the application of the super-starting system has become increasingly widespread.

Existing large cranes usually include a main arm and a telescopic arm that can protrude from the main arm. In order to make the telescopic crane have a larger total arm length and a higher lifting height, the arm length of the telescopic arm is more and more Long, the weight of the main arm and the telescopic arm is also increasing. The increase in the length of the main arm and the telescopic arm and the increase in the weight of the arm will make the stress of the main arm worse when the heavy object is lifted, and the deflection of the main arm in the plane of the variable plane and the plane of rotation (ie, the vertical deflection of the main arm) And lateral deflection) is getting bigger and bigger. The total arm length, lifting height and maximum lifting weight of the crane are severely constrained.

In response to the above problems, the super-lifting system is applied to a large-tonnage crane. As shown in Fig. 1, the super-lifting system can generally include a super-lifting mast 60, a variable-width cylinder 70, a super-lifting 55, and a hoisting motor (not shown). , the wire rope 30, the locking device 50 and the control device. The super-lifting mast 60 is generally a cylinder having sufficient rigidity and strength, and the fixed end thereof is normally pivoted to the main arm 10 of the crane through a rotating shaft, so that the super-lifting mast 60 can be rotated about the rotating shaft, and the mast 60 and the main arm 10 are super-lifted. The defined plane is generally generally straight. A variable amplitude cylinder 70 is disposed between the super-lifting mast 60 and the main arm 10, and two ends of the variable-width cylinder 70 are normally pivotally connected to the super-lifting mast 60 and the main arm 10, respectively, to push the super-lifting mast 60 relative to the main arm 10 Rotate in the plane of the variator.

The super-lifting mast 60 has a movable end corresponding to the fixed end thereof, and an over-lifting wire rope 30 is disposed between the movable end and the extended end of any of the telescopic arms 20 of the crane; one end of the super-lifting wire rope 30 and the super-lifting mast 60 The movable end is connected, and the other end thereof can be connected to the extended end of any of the telescopic arms 20 of the crane for forming a pulling force between the movable end of the super-lifting mast 60 and the extended end of the telescopic arm 20. The movable end of the super-lifting mast 60 is provided with an hoisting 55 and a hoisting mechanism motor for driving the hoisting 55, and the hoisting rope 30 is specifically connected to the hoisting 55. An auxiliary tensioning device 40 is disposed between the movable end of the super-lifting mast 60 and the root of the main arm 10. The two ends of the auxiliary tensioning device 40 are respectively coupled to the movable end of the super-lifting mast 60 and the root of the main arm 10. The auxiliary tensioning device 40 has an appropriate length so that the auxiliary tensioning device 40 can be tensioned after the lifting mast 60 is lifted by the variable amplitude cylinder 70, so that the movable end of the super-lifting mast 60 and the main arm 10 A tensile force is formed between the roots to ensure that the mast 60 Not leaning forward.

When lifting a heavy object, the super-lifting mast 60 of the super-lifting system can be lifted from the main arm 10 of the crane by the luffing cylinder 70, and rotates around the fixed end thereof in the plane of the variable amplitude, and finally the mast 60 is overtaken. The main arm 10 can be generally vertical. Since the super-lifting wire rope 30 exerts a pulling force between the telescopic arm 20 and the movable end of the super-lifting mast 60, the pulling force can balance the partial shearing force of the heavy object, and the force state of the main arm 10 can be remarkably improved, thereby significantly lifting the telescopic arm. 20 crane's total arm length, lifting height and lifting weight.

Fig. 2 is a schematic view showing the mounting structure of the locking device 50 in the super-lifting system of a typical crane. A typical locking device 50 includes an unlocking cylinder 52 and a locking cylinder 51 pivotally coupled to the unlocking cylinder 52. The locking device 50 uses the two cylinders to cooperate to complete the tensioning and locking of the super-lifting system. The unlock cylinder 52 is responsible for controlling the lifting and lowering of the lock cylinder 51, and the lock cylinder 51 is responsible for the locking action of the hoisting 55. The end of the reel hoisting 55 that is coaxially fixed to the hoisting mechanism motor has a ratchet 54 at both ends thereof, and the end of the piston rod of the locking cylinder 51 is connected to a thick square plate through the pin shaft, and both sides of the thick square plate Locking pins 53 are mounted, and the force of the cylinders is transmitted to the ratchets 54 by the locking pins 53. When the hoisting 55 lock is required, the over-locking cylinder 51 is controlled to fall by the unlocking cylinder 52, so that the two locking pins 53 on the thick square plate are synchronized into the grooves of the ratchet 54 and then against the ratchet 54 to avoid The super-winding 55 is rotated, thereby achieving the locking of the super-winding 55, preventing the super-winding 55 from rotating under the load. When the hoisting 55 is required to be unlocked, the locking cylinder 51 is controlled by the unlocking cylinder 52 to disengage the locking pin 53 from the groove of the ratchet 54 so that the hoisting 55 can be freely rotated to unlock. The above-described operation of the unlock cylinder 52, the lock cylinder 51, and the hoist mechanism motor is generally performed by manual single-step control. The operator needs to carry out system learning and long-term practice. With the operation experience, through the system's action coordination and monitoring instructions, the locking operation of the super-start system is realized step by step. Therefore, the existing control methods are complicated to operate, require high requirements for operators, and require rich operational experience; the degree of automation is not high, the operators need to manually and step by step to complete a series of operations, and the labor intensity is large; the entire operation process is over-reliant The subjective judgment is prone to misuse; the quality of operation varies from person to person and has a certain impact on the safe use of the crane. Summary of the invention

In order to solve the above-described deficiencies in the prior art, it is an object of the present invention to provide a control method, a control device, a super-lift system, and a construction machine for a super-lift system.

In order to achieve the above object, the present invention provides a control method for a super-lifting system including an over-lifting and locking device, the locking device comprising a locking cylinder and an unlocking cylinder, the control method comprising: Detecting a position of a piston rod of the lock cylinder; and performing an unlocking operation or a locking operation of the locking device according to the detected position of the piston rod of the lock cylinder. The present invention also provides a control device for a super-lifting system, the super-lifting system comprising a super-lifting and locking device, the locking device comprising a locking cylinder and an unlocking cylinder, wherein the control device comprises: a receiving unit a position detecting signal for receiving a position of the piston rod indicating the locking cylinder; a processing unit, configured to receive the position detecting signal from the receiving unit, and send a corresponding operation signal according to the position detecting signal to execute the The unlocking operation or the locking operation of the locking device.

The present invention also provides a super-lifting system including an over-lifting and locking device, the locking device comprising a locking cylinder and an unlocking cylinder, wherein the super-lifting system further comprises: a first position detecting device And detecting whether the piston rod of the locking cylinder reaches a first set position, and issuing a first position detection signal when the piston rod reaches the first set position; and the above control for the super-lift system Device.

The present invention also provides a construction machine comprising the above-described superlift system.

Through the above technical solution, the locking or unlocking process of the super-lifting system can be automatically performed, and the dependency on the manual operation is reduced, thereby reducing labor intensity and misoperation.

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

1 is a schematic view of a super-lifting system in the prior art;

Figure 2A is a schematic view showing the structure of the locking device 50 of the super-lifting system shown in Figure 1;

Figure 2B is a perspective view of the locking cylinder 51 as viewed in the direction of the locking device 50 of Figure 2A; Figure 3 is a schematic view of the locking device 50 of the super-lifting system according to an embodiment of the present invention; Is a flowchart of a control method for a super-lift system according to an embodiment of the present invention; and FIG. 5 is a flowchart of a control method for a super-lift system according to an embodiment of the present invention.

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

Referring to FIG. 1 and FIGS. 2A-2B, in accordance with the present general inventive concept, a control method for a super-lift system is provided, which may include an over-winding 55 and a locking device 50, the locking device The 50 includes a lock cylinder 51 and an unlock cylinder 52. The control method may include: Detecting a position of a piston rod of the lock cylinder 51;

The unlocking operation or the locking operation of the locking device 50 is performed in accordance with the detected position of the piston rod of the lock cylinder 51.

According to the present general inventive concept, in the unlocking operation or the locking operation of the locking device 50, the step of detecting the position of the piston rod of the lock cylinder 51 is added, and the unlocking operation or the locking operation can be automatically performed in accordance with the detection.

Embodiments of the present invention will be described below from two aspects of an unlocking process and a locking process.

4 is a flow chart of a control method for a super-lift system in accordance with an embodiment of the present invention. The embodiment shown in Figure 4 relates to the unlocking process of the locking device 50. The hoisting system may include an hoisting 55 and a locking device 50. The locking device 50 may include a side plate 59, a locking cylinder 51 and an unlocking cylinder 52. One end of the locking cylinder 51 and the unlocking cylinder 52 may be The side plate 59 is pivotally connected, and one end of the piston rod of the unlocking cylinder 52 is pivotally connected to the locking cylinder 51. One end of the piston rod of the locking cylinder 51 is fixed with a locking pin 53. The control method may include:

Controlling the piston rod of the locking cylinder 51 to retract;

Detecting whether the piston rod of the locking cylinder 51 is retracted to the first set position;

If it is detected that the piston rod is not retracted to the first set position, the piston rod retraction of the lock cylinder 51 may be stopped, and the piston rod of the unlock cylinder 52 may be controlled to extend;

Detecting whether the piston rod of the unlock cylinder 52 extends to the second set position;

When it is detected that the piston rod of the unlock cylinder 52 reaches the second set position, the piston rod of the unlock cylinder 52 can be stopped.

Further, for safety reasons, the rope collecting operation of the super-lift hoist 55 can be performed while controlling the piston rod of the unlock cylinder 52 to extend;

The rope collecting operation of the super-winding 55 can be stopped while the piston rod of the unlock cylinder 52 is stopped. When the piston rod of the unlock cylinder 52 is stopped, the unlocking has been successful, and the operation of the super-winding 55 needs to be stopped accordingly.

The movement of the piston rod of the lock cylinder 51 can be detected by the position detecting means. For example, an inductive switch provided on the lock cylinder 51 can be utilized. When the piston rod of the lock cylinder 51 is moved to the first set position, the induction switch is triggered and actuated to generate a signal (i.e., the first position detection signal described later). The first set position can be flexibly set according to the actual situation. However, for safety reasons, when the piston rod of the locking cylinder 51 reaches the first set position, the locking pin 53 fixed at one end of the piston rod cannot be completely disengaged from the groove of the ratchet 54, and the locking pin 53 and the groove are There should also be some interaction between the two. This can prevent the lock pin 53 from being completely disengaged from the groove of the ratchet 54 and overtake the hoisting 55 to make a safety hazard caused by the rope collecting operation. If it is detected that the piston rod of the lock cylinder 51 has not contracted to the first set position, the lock cylinder 51 can be operated to retract the piston rod of the lock cylinder 51. This can be done by controlling the solenoid valve in the oil passage of the lock cylinder 51. When the piston rod is retracted to the first position, the action of the piston rod can be stopped, and the unlocking cylinder 52 can be started to operate to extend the piston rod, and the super-winding 55 is operated to perform the rope collecting operation. The unlock cylinder 52 begins to open the lock cylinder 51 so that the lock pin 53 can be completely disengaged from the groove of the ratchet 54 and the super-lift tamper 55 begins to pull up the wire rope 30. The operation of the unlock cylinder 52 can also be realized by controlling the solenoid valve in the oil passage of the unlock cylinder 52, and the operation of the superlifting hoist 55 can be realized by controlling the hydraulic motor that drives the superlifting hoist 55.

When the piston rod of the unlock cylinder 52 is extended to the second set position, the operation of the unlock cylinder 52 and the super-winding 55 can be stopped, and the state of the unlock cylinder 52 and the super-winding 55 can be maintained. The detection of the second set position is similar to the first set position. For example, a position detecting device provided on the unlock cylinder 52, such as an inductive switch, can be used to detect whether the piston rod of the unlock cylinder 52 extends to the second set position. The setting of the second set position is not strictly required as long as the lock pin 53 can be completely separated from the groove of the ratchet 54.

In one case, if it is detected that the piston rod of the lock cylinder 51 has been retracted to the first set position, the retracting operation of the lock cylinder 51 can be stopped. Of course, it is also possible to stop the retracting operation of the lock cylinder 51 without stopping. In this case, the piston rod of the lock cylinder 51 can be further retracted when it is retracted to the first set position until the maximum amount of retraction or a position deeper than the first set position is reached.

During the unlocking process, if some faults are encountered, such as a failure of the unlocking cylinder 52, the piston rod of the unlocking cylinder 52 cannot be extended, and measures for indicating or alarming the fault state in these cases are required. According to an embodiment of the present invention, the method may further include extending the piston rod of the unlocking cylinder 52 to the second set position for a predetermined time from when the piston rod of the unlocking cylinder 52 starts to protrude. , indicating that the locking device 50 is unlocked successfully; if the piston rod of the unlocking cylinder 52 does not reach the second set position within a predetermined time from when the piston rod of the unlocking cylinder 52 starts to protrude , indicating that the locking device 50 fails to unlock.

The above is described with respect to the unlocking process of the locking device 50, and the embodiment of the present invention will be described below with respect to the locking process of the locking device 50.

FIG. 5 is a flow chart of a control method for a super-lift system according to an embodiment of the present invention. Refer to Figure 1, Figure

2A-2B and FIG. 5, in accordance with an embodiment of the present invention, the lift-up system may include an overhang hoist 55 and a locking device 50 that includes a side panel 59, a lock cylinder 51, an unlock cylinder 52, and A ratchet 54 that can rotate coaxially with the super-lift hoist 55, one end of the lock cylinder 51 and the unlock cylinder 52 is pivotally connected to the side plate 59, and one end of the piston rod of the unlock cylinder 52 and the lock cylinder 51 are unlocked. The locking rod 53 is fixed to one end of the piston rod of the locking cylinder 51. The control method may include: Controlling the piston rod of the locking cylinder 51 to extend;

Detecting whether the piston rod of the lock cylinder 51 extends to the third set position;

When it is detected that the piston rod of the lock cylinder 51 reaches the third set position, the piston rod of the lock cylinder 51 is stopped.

Further, during the control of the extension of the piston rod of the lock cylinder 51, the piston rod of the unlock cylinder 52 is retracted.

Further, the control method may further include:

During the extension of the piston rod of the lock cylinder 51, the locking pressure of the lock cylinder 51 can be detected, and the lock pressure is the pressure applied by the ratchet 54 to the lock pin 53;

If it is detected that the piston rod of the locking cylinder 51 reaches the third set position before the detected locking pressure reaches the first pressure setting value, indicating that the locking device 50 fails to lock .

The movement of the piston rod of the lock cylinder 51 can be detected by the position detecting means. For example, an inductive switch provided on the lock cylinder 51 can be utilized. When the piston rod of the lock cylinder 51 is moved to the third set position, the induction switch is triggered and actuated to generate a signal (i.e., a third position detection signal described later). The third set position can be flexibly set according to the actual situation, and the lock pin 53 can finally completely enter the recess of the ratchet 54 as long as the piston rod of the lock cylinder 51 reaches the third set position.

The locking pressure is detected in order to understand how much force is applied between the groove of the ratchet 54 and the locking pin 53, since the force between the groove and the locking pin 53 needs to reach a certain value to be regarded as a successful locking. The detection of the locking pressure can be accomplished by, for example, a pressure sensor disposed in the lock cylinder 51. The pressure sensor determines the amount of force between the groove and the lock pin 53 by detecting the pressure of the hydraulic oil in the lock cylinder 51. It will be understood by those skilled in the art that the manner or means for detecting the locking pressure is not limited to the pressure sensor in the locking cylinder 51.

The first set pressure value may be the minimum value of the force between the groove of the ratchet 54 and the locking pin 53 required to successfully lock. If the piston rod of the locking cylinder 51 has reached the third set position when the locking pressure has not reached the first set pressure value, it indicates that the piston of the cylinder 51 is locked when the locking pressure has not reached the required pressure value. The lever has been extended and cannot be locked, indicating that the lock failed.

When the locking pressure reaches the first set pressure value, it is also necessary to judge whether or not the locking pin 53 can enter the recess of the ratchet 54. Therefore, according to a further embodiment of the present invention, the control method may further include:

Detecting whether the locking pin 53 enters the recess of the ratchet 54 if the locking pressure reaches the first pressure setting;

If it is detected that the locking pin 53 enters the recess of the ratchet 54, the locking device 50 is indicated The locking is successful; and if it is detected that the locking pin 53 does not enter the recess of the ratchet 54, the locking device 50 is indicated to have failed to lock.

Detection of the locking pin 53 into the recess of the ratchet 54 can also be performed by a position detecting device such as an inductive switch. When the locking pin 53 enters the recess, the inductive switch is triggered and a position detection signal is sent.

In addition, it may be necessary to tighten the super-wire rope 30 before the piston rod of the locking cylinder begins to protrude. Therefore, the method may further include:

Performing a rope collecting operation of the super-lifting 55;

Detecting the tension of the oversized wire rope 30;

In the case where the detected tensioning force reaches the second pressure set value, the rope collecting operation of the superlifting hoist 55 is stopped.

The detection of the tension of the super-wire rope 30 can be performed by a pressure detecting device such as a pressure sensor located at the hoisting 55. The second pressure setting may be the tightening force of the super-wire rope 30 required for locking.

The super-lifting system may also include a super-lifting mast and a luffing cylinder 70 for driving the super-lifting mast to rotate about the main arm 10, typically requiring the super-lifting mast to be perpendicular to the main arm 10 during the locking operation. Therefore, the control method may further include:

Detecting whether the raised mast is perpendicular to the main arm 10;

If it is detected that the overhanging mast is not perpendicular to the main arm 10, the luffing cylinder 70 is operated to maintain the superlifting mast perpendicular to the main arm 10.

The detection of whether or not the super-lifting mast is perpendicular to the main arm 10 can also be realized by a position detecting device (for example, an inductive switch provided on the main arm 10). When the overhanging mast is perpendicular to the main arm 10, the inductive switch is triggered and a position detection signal is sent indicating that the superlifting mast is perpendicular to the main arm 10.

At least a part of the above-described unlocking process and locking process can be performed by the control device, and a control device for the super-lifting system that can be used to execute the control method will be described below.

According to an embodiment of the present invention, there is provided a control device for a super-lift system, which may include an hoisting 55 and a locking device 50, which may include a side panel 59, a lock The tightening cylinder 51 and the unlocking cylinder 52, one end of the locking cylinder 51 and the unlocking cylinder 52 can be pivotally connected to the side plate 59, and one end of the piston rod of the unlocking cylinder 52 can be pivotally connected to the locking cylinder 51, the locking A locking pin 53 is fixed to one end of the piston rod of the cylinder 51, wherein the control device comprises:

a receiving unit, configured to receive a position detecting signal indicating a position of a piston rod of the locking cylinder 51; a processing unit, configured to receive the position detecting signal from the receiving unit, and send a position detection signal according to the position detecting signal A corresponding operational signal is sent to perform an unlocking operation or a locking operation of the locking device 50.

For the unlocking operation, the position detection signal may include a first position detection signal indicating that the piston rod of the locking cylinder 51 is retracted to the first set position; the processing unit may be configured to: send a third operation signal, the third The operation signal is used for controlling the retraction of the piston rod of the locking cylinder 51; when receiving the first position detection signal, stopping transmitting the third operation signal, and transmitting a first operation signal, the first operation signal A piston rod for controlling the unlock cylinder (52) is extended. The receiving unit may be further configured to receive a second position detecting signal indicating that the piston rod of the unlocking cylinder 52 extends to the second set position; and the processing unit may further be configured to receive the second position detecting When the signal is received, the transmitting of the first operation signal is stopped.

The processing unit can also be used to:

Transmitting, when transmitting the first operation signal, a second operation signal, the second operation signal being used to perform a rope collecting operation of the super-winding 55;

The transmitting of the second operation signal is stopped when the transmitting of the first operation signal is stopped.

The control device may further include a timing unit for starting timing when the processing unit transmits the first operation signal;

The processing unit may be further configured to perform at least one of the following:

And transmitting an indication signal indicating that the locking device 50 is successfully unlocked if the second position detection signal is received before the number of times of the timing unit exceeds a predetermined threshold;

An indication signal indicating that the locking device 50 has failed to be unlocked is transmitted without receiving the second position detection signal before the number of timings of the timing unit exceeds a predetermined threshold.

For example, the timer can be set to a predetermined threshold, and when the processing unit issues the first operational signal (or the second operational signal), the timing unit can be activated (or triggered) and the timing unit begins timing. If the processing unit receives the second position detection signal from the receiving unit before the number of seconds of the timing unit exceeds the predetermined threshold, the unlocking process is normal. If the second position detection signal is not received before the number of times exceeds the threshold, the unlocking cannot be performed normally, and the processing unit may send an indication signal indicating that the unlocking has failed.

For the locking process, the position detecting signal may further include a third position detecting signal indicating that the piston rod of the locking cylinder (51) extends to the third set position;

The processing unit can also be used to:

Sending a third operation signal for controlling the piston rod of the lock cylinder 51 to extend; and

When the third position detection signal is received, the transmitting of the third operation signal is stopped. The receiving unit may be further configured to receive a first pressure detecting signal indicating a locking pressure of the locking cylinder 51, the locking pressure being a pressure applied by the ratchet 54 to the locking pin 53;

The processing unit is further configured to compare the locking pressure of the locking cylinder 51 indicated by the first pressure detecting signal with a first pressure setting value, and before the locking pressure reaches the first pressure setting value When the third position detection signal is received, a first indication signal indicating that the locking device 50 has failed to be locked is transmitted.

The receiving unit is further configured to receive a fourth position detecting signal indicating that the locking pin (53) enters into a recess of the ratchet (54);

The processing unit may be further configured to: when the locking pressure reaches the first pressure setting value, send the indication that the locking device (50) is locked if the fourth position detecting signal is received A successful second indication signal, otherwise transmitting a third indication signal indicating that the locking device (50) failed to lock.

When the piston rod of the reduction cylinder is extended toward the third set position, the lock cylinder 51 itself is simultaneously pressed against the ratchet wheel 54, that is, the piston rod of the unlock cylinder 52 needs to be retracted. For this process, the unlock cylinder 52 can be active or passive. In an active implementation, the processing unit may be further configured to send a fourth operation signal for controlling the piston rod retraction of the unlocking cylinder 52 while transmitting the third operation signal. . When the piston rod of the unlock cylinder 52 is retracted by a certain distance, the processing unit can stop transmitting the fourth operation signal. It is also possible to determine when to stop transmitting the fourth operation signal by the position detecting means. When the piston rod of the unlocking cylinder 52 is retracted by a certain distance, the position detecting means is triggered to send a signal to the processing unit, and the processing unit receives the After the signal is stopped, the fourth operation signal is stopped. The magnitude of the third operational signal and/or the fourth operational signal can be adjusted to adjust the ratio between the extension speed of the piston rod of the lock cylinder 51 and the retraction speed of the piston rod of the unlock cylinder 52.

In the passive embodiment, the fourth operation signal, e.g., described above, may not be sent to the unlock cylinder 52, but an elastic member such as a spring may be added. As shown in Fig. 3, one end of the elastic member may be coupled to the side plate 59 (e.g., pivoted or hinged), and the other end may be coupled (e.g., pivoted or hinged) to the lock cylinder 51. The elastic member always applies a force to the lock cylinder 51 to the ratchet 54. In this embodiment, although it is not necessary to transmit the fourth operation signal described above to the unlock cylinder 52, it is necessary to open the oil return passage of the unlock cylinder 52 when transmitting the third operation signal, so the processing unit may also need to send the unlock cylinder 52. An operation signal that causes the oil return passage of the unlock cylinder 52 to open. When the oil return passage of the unlock cylinder 52 is opened, the lock cylinder 51 is pressed against the ratchet 54 by the restoring force of the elastic member, and the piston rod of the unlock cylinder 52 is also retracted by the restoring force. The ratio between the extension speed of the piston rod of the lock cylinder 51 and the retraction speed of the piston rod of the unlock cylinder 52 can be adjusted by adjusting the third operation signal and/or the damping of the oil return passage of the unlock cylinder 52.

In a further embodiment of the present invention, the processing unit may be further configured to send the third operation signal And transmitting a fifth operation signal for performing a rope collecting operation of the super-winding 55; the receiving unit is further configured to receive a second pressure detecting signal indicating a tension of the wire rope 30 And the processing unit is further configured to compare the tension indicated by the second pressure detection signal with a second pressure setting value, and when the tensioning force reaches the second pressure setting value In the case, the transmission of the fifth operation signal is stopped.

The super-lifting system may further include a super-lifting mast and a variable-speed cylinder for driving the super-lifting mast to rotate around the main arm 10

70;

The receiving unit may be further configured to receive a fifth position detection signal indicating that the raised mast is perpendicular to the main arm 10;

The processing unit may be further configured to send a sixth operation signal for not operating the fifth position detection signal, the sixth operation signal for operating the variator cylinder 70 to cause the super-lifting mast Rotating around the main arm 10; and stopping transmitting the sixth operational signal if the fifth position detection signal is received.

The above control device may be implemented by software, hardware or a combination of software and hardware. Suitable control devices may include, but are not limited to, a single chip microcomputer, a PLC controller, a DSP chip, an FPGA circuit, and the like.

Accordingly, an embodiment of the present invention also provides a super-lifting system that can include an over-lift hoist 55 and a locking device 50 that includes a locking cylinder 51 and an unlocking cylinder 52, The super-starting system may further include:

The first position detecting device 561 is configured to detect whether the piston rod of the locking cylinder 51 reaches the first set position, and issue a first position detecting signal when the piston rod reaches the first set position;

The above control device for the super-lift system.

In addition, the super-start system can also include:

The second position detecting device 562 is configured to detect whether the piston rod of the unlocking cylinder 52 reaches the second set position, and issue a second position detecting signal when the piston rod of the unlocking cylinder 52 reaches the second set position.

As previously described, the first position detecting means 561 and the second position detecting means 562 may be, for example, inductive switches located on the lock cylinder 51 and the unlock cylinder 52, respectively. The inductive switch can be, for example, a proximity switch.

The super-lifting system may further include a super-lifting mast, a luffing cylinder 70 for driving the super-lifting mast to rotate around the main arm 10, and the super-lifting cam 55 is provided with a ratchet 54 capable of coaxial rotation, and the locking device 50 may further include The side plate 59, one end of the locking cylinder 51 and the unlocking cylinder 52 is pivotally connected to the side plate 59, and one end of the piston rod of the unlocking cylinder 52 is pivotally connected to the locking cylinder 51, and the piston rod end of the locking cylinder 51 The locking pin 53 is fixed, wherein the super-lifting system may further include: a first pressure detecting device 571 for detecting a locking pressure of the locking cylinder 51 and transmitting a first pressure detecting signal indicating the locking pressure, the locking pressure being applied to the locking pin 53 by the ratchet 54 a second pressure detecting device 572, configured to detect a tension of the wire rope 30 and send a second pressure detecting signal indicating the tensioning force;

a third position detecting device 563, configured to detect whether the piston rod of the locking cylinder 51 extends to a third set position, and detects that the piston rod of the locking cylinder 51 extends to the third set position Sending a third position detection signal;

a fourth position detecting means 564 for detecting whether the locking pin 53 has entered the recess of the ratchet 54 and transmitting a fourth when detecting that the locking pin 53 has entered the recess of the ratchet 54 Position detection signal;

The fifth position detecting means 565 is configured to detect whether the raised mast is perpendicular to the main arm 10, and transmits a fifth position detecting signal upon detecting that the raised mast is perpendicular to the main arm 10.

The first and second pressure detecting means 572 described above may be, for example, pressure sensors; and the third, fourth, and fifth position detecting means 565 may be, for example, inductive switches. The inductive switch can be, for example, a proximity switch.

The locking device 50 can also include an elastic member as described above that can be used to bias the lock cylinder 51 toward the ratchet 54.

In addition, the pop-up system may also include other components such as an input device and a display device (not shown). The input device can be, for example, a keyboard, a mouse, and the display device can be, for example, a display screen. In some embodiments, the input device and display device can be integrated into one device, such as a touch screen. The input device can be used to input commands or parameters to the control device, such as an unlock request or a lock request. The display device can be used to receive an indication signal such as a control device, display a fault, and can display an operational status or the like.

The control method, the control device and the super-lifting system provided by the embodiments of the present invention can automatically perform the unlocking process and/or the locking process, and can promptly indicate the fault in the event of a failure in the unlocking process or the locking process.

According to an embodiment of the present invention, there is also provided a construction machine comprising the above-described super-lift system.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

In addition, it should be noted that the specific technical features described in the above specific embodiments are not spears. In the case of a shield, it can be combined in any suitable manner.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims

Rights request

A control method for an overlifting system, the superlifting system comprising an overhanging (55) and a locking device (50), the locking device (50) comprising a locking cylinder (51) and an unlocking cylinder (52), the control method includes:

Detecting a position of a piston rod of the lock cylinder (51);

The unlocking operation or the locking operation of the locking device (50) is performed in accordance with the detected position of the piston rod of the lock cylinder (51).

2. The control method according to claim 1, wherein:

The detecting the position of the piston rod of the locking cylinder (51) comprises: detecting whether the piston rod of the locking cylinder (51) is retracted to a first set position;

The unlocking operation includes:

Controlling the piston rod of the locking cylinder (51) to retract;

Stopping the piston rod retraction of the lock cylinder (51) and detecting the piston rod of the unlock cylinder (52) when detecting that the piston rod of the lock cylinder (51) is retracted to the first set position Extend

Detecting whether the piston rod of the unlocking cylinder (52) extends to a second set position;

When it is detected that the piston rod of the unlock cylinder (52) reaches the second set position, the piston rod of the unlock cylinder (52) is stopped.

The control method according to claim 2, wherein the unlocking operation further comprises:

Performing the rope lifting operation of the super-lifting (55) while controlling the piston rod of the unlock cylinder (52) to extend and

The rope retracting operation of the super-lifting (55) is stopped while the piston rod of the unlock cylinder (52) is stopped.

The control method according to claim 2 or 3, wherein the unlocking operation further comprises:

If the piston rod of the unlocking cylinder (52) reaches the second set position within a predetermined time from the start of the piston rod of the unlocking cylinder (52), indicating the locking device ( 50) the unlocking is successful; and if the piston rod of the unlocking cylinder (52) does not reach the second set position within a predetermined time from the start of the piston rod of the unlocking cylinder (52), the indication The locking device (50) failed to unlock.

5. The control method according to claim 1, wherein the locking device (50) further comprises a ratchet (54) rotatable coaxially with the super-up hoist (55), the locking cylinder ( 51) The piston rod is fixed with a locking pin at one end

(53),

The detecting the position of the piston rod of the locking cylinder (51) further comprises: detecting whether the piston rod of the locking cylinder (51) extends to a third set position;

The locking operation includes:

Controlling the piston rod of the lock cylinder (51) to extend;

When it is detected that the piston rod of the lock cylinder (51) reaches the third set position, the piston rod of the lock cylinder (51) is stopped.

6. The control method according to claim 5, wherein the locking operation further comprises at least one of: detecting the locking cylinder during the extension of the piston rod of the locking cylinder (51) (51) a locking pressure that is the pressure applied by the ratchet (54) to the locking pin (53); if the detected locking pressure reaches the first pressure setting The piston rod of the locking cylinder (51) extends to the third set position, indicating that the locking device (50) fails to lock;

In the case where the locking pressure reaches the first pressure setting value, detecting whether the locking pin (53) enters into the groove of the ratchet (54), if the locking pin is detected (53) Entering into the recess of the ratchet (54) indicates that the locking device (50) is successfully locked, otherwise indicating that the locking device (50) has failed to lock.

The control method according to claim 5, wherein the locking operation further comprises:

The piston rod of the unlock cylinder (52) is retracted during control of the piston rod of the lock cylinder (51).

8. The control method according to claim 5, wherein the locking operation further comprises before controlling the piston rod of the lock cylinder (51) to extend:

Performing a rope collecting operation of the super-lifting (55);

Detecting the tension of the oversized wire rope (30);

In the case where the detected tensioning force reaches the second pressure set value, the rope collecting operation of the super-lifting (55) is stopped.

9. The control method according to claim 8, wherein the super-lifting system further comprises a super-lifting mast and a luffing cylinder (70) for driving the super-lifting mast to rotate around the main arm (10), the locking The operation also includes before performing the take-up operation of the super-lifting (55):

Detecting whether the raised mast is perpendicular to the main arm (10);

If it is detected that the overhanging mast is not perpendicular to the main arm (10), the luffing cylinder (70) is operated to maintain the superlifting mast perpendicular to the main arm (10).

10. A control device for an overlifting system, the superlifting system comprising an overhanging (55) and a locking device (50), the locking device (50) comprising a locking cylinder (51) and an unlocking cylinder (52), characterized in that the control device comprises: a receiving unit for receiving a position detecting signal indicating a position of a piston rod of the locking cylinder (51); and a processing unit for receiving the receiving unit from the receiving unit The position detecting signal transmits a corresponding operation signal according to the position detecting signal to perform an unlocking operation or a locking operation of the locking device (50).

11. The control device according to claim 10, wherein the position detection signal comprises a first position detection signal indicating that the piston rod of the lock cylinder (51) is retracted to a first set position;

During the unlocking operation:

The processing unit is used to:

Sending a third operation signal for controlling the piston rod retraction of the lock cylinder (51);

Receiving, when the first position detection signal is received, stopping transmitting the third operation signal, and transmitting a first operation signal, wherein the first operation signal is used to control a piston rod of the unlocking cylinder (52) to extend;

The receiving unit is further configured to receive a second position detecting signal indicating that the piston rod of the unlocking cylinder (52) extends to the second set position;

The processing unit is further configured to stop transmitting the first operation signal when the second position detection signal is received.

The control device according to claim 11, wherein the processing unit is further configured to:

Transmitting, when transmitting the first operation signal, a second operation signal for performing a rope collecting operation of the super-lifting (55);

The control device according to claim 11 or 12, further comprising a timing unit, wherein the timing unit is configured to start timing when the processing unit transmits the first operation signal;

The processing unit is further configured to perform at least one of the following:

Sending an indication signal indicating that the locking device (50) is successfully unlocked if the second position detection signal is received before the number of timings of the timing unit exceeds a predetermined threshold;

An indication signal indicating that the locking device (50) has failed to be unlocked is transmitted without receiving the second position detection signal before the number of timings of the timing unit exceeds a predetermined threshold.

14. The control device according to claim 11, wherein the locking device (50) further comprises a ratchet (54) rotatable coaxially with the super-up hoist (55), the locking cylinder (51) ) The piston rod is fixed with a locking pin at one end

(53),

The position detecting signal further includes a third position detecting signal indicating that the piston rod of the locking cylinder (51) extends to the third set position;

During the locking operation,

The processing unit is further configured to:

Transmitting a third operation signal for controlling a piston rod of the lock cylinder (51) to extend;

When the third position detection signal is received, the transmitting of the third operation signal is stopped.

15. The control device according to claim 14, wherein: during the locking operation: the receiving unit is further configured to receive a first pressure detection signal indicating a locking pressure of the locking cylinder (51), the lock Tight pressure is the pressure applied by the ratchet (54) to the locking pin (53);

The processing unit is further configured to compare a locking pressure of the locking cylinder (51) indicated by the first pressure detecting signal with a first pressure setting value, and reach a first pressure setting at the locking pressure In the case where the value is received before the third position detection signal, a first indication signal indicating that the locking device (50) has failed to be locked is transmitted.

16. The control device according to claim 15, wherein: during the locking operation: the receiving unit is further configured to receive a recess indicating that the locking pin (53) enters the ratchet (54) Fourth position detection signal;

The processing unit is further configured to: if the locking pressure reaches the first pressure setting value, if receiving To the fourth position detection signal, a second indication signal indicating that the locking device (50) is successfully locked is transmitted, otherwise a third indication signal indicating that the locking device (50) has failed to be locked is transmitted.

The control device according to claim 14, wherein the processing unit is further configured to send a fourth operation signal for transmitting the unlocking cylinder while transmitting the third operation signal ( 52) The piston rod is retracted.

18. The control device according to claim 14, wherein the locking device (50) further comprises an elastic member for biasing the locking cylinder (51) toward the ratchet (54) The processing unit is further configured to send an operation signal for opening an oil return passage of the unlocking cylinder (52) while transmitting the third operation signal.

The control device according to claim 14, wherein the processing unit is further configured to send a fifth operation signal, before the transmitting the third operation signal, the fifth operation signal is used to perform the super-lifting (55) the rope collection operation;

The receiving unit is further configured to receive a second pressure detection signal indicating a tension of the wire rope (30); and

The processing unit is further configured to compare the tension force indicated by the second pressure detection signal with a second pressure setting value, and in a case where the tensioning force reaches the second pressure setting value Stop transmitting the fifth operation signal.

20. The control device according to claim 15, wherein the super-lifting system further comprises a super-lifting mast and a luffing cylinder (70) for driving the super-lifting mast to rotate around the main arm (10), During the lock operation:

The receiving unit is further configured to receive a fifth position detecting signal indicating that the super-lifting mast is perpendicular to the main arm (10);

The processing unit is further configured to send a sixth operation signal, when the fifth position detection signal is not received, for operating the luffing cylinder (70) to cause the super-start The mast rotates about the main arm (10); and stops transmitting the sixth operation signal if the fifth position detection signal is received.

21. A super-lifting system comprising an over-lifting (55) and a locking device (50), the locking device (50) comprising a locking cylinder (51) and an unlocking cylinder (52), The super-lifting system further includes: a first position detecting device (561), configured to detect whether the piston rod of the locking cylinder (51) reaches the first position Positioning, and issuing a first position detection signal when the piston rod reaches the first set position;

A control device for a super-lift system according to any one of claims 10-20.

22. A construction machine, characterized in that the construction machine comprises a super-lift system according to claim 21.