Method of and device for supply of measuring and control component part of load-lifting crane safety and control system arranged on boom or on tackle block

FIELD: mechanical engineering.

SUBSTANCE: invention relates to safety and control systems of load lifting cranes. Proposed method of supply of measuring and control component part of safety and control system arranged on boom or tackle block of load-lifting crane comes to use of self-contained supply source with automatic charging the source from generator - converter of mechanical energy of moving load or boom wire rope of load-lifting crane or block directing or supporting the wire, rope, into electric energy. According to invention, said component part of safety and control system of crane provides measuring of at least one operating parameter and control of loads, particularly, marker light and/or headlight. To charge self-contained supply source, in additional of wire rope motion energy, use can be made of energy of external mechanical actions, solar energy or heat energy of surrounding medium. Transmission of data between component parts of system can be provided by wireless data exchange channel.

EFFECT: facilitated maintenance, increased reliability, provision of serviceability of safety and control system of crane.

16 cl, 2 dwg

 

The invention relates to mechanical engineering and can be used in the protection system, crane and its load - marker lamp, spotlights, etc. located on the boom or on strelba or freight polyspast crane.

There is a method of power electronic systems protection, crane, consisting of interconnected electronic components and sensors, by passing the supply voltage from the vehicle crane in each electronic unit and the sensor, stabilize the transmitted voltage and its subsequent use to power the electronics of the unit or sensor [1].

A device for implementing this method - stable device power system protection valve contains voltage regulators installed in each unit and each sensor system, and the inputs of the stabilizer is connected to the power supply lines connected to the onboard network load-lifting crane, and outputs connected to the power pins of the electronic circuits of blocks and sensors [1].

The need for wiring of power supply to each block and the sensor increases the complexity of the repair and installation of security system on the crane and to decrease its reliability. In addition, the power units and sensors in this technical is the information and communications technology is only after submission of security-voltage on-Board network load-lifting crane. This eliminates the possibility of measuring operating parameters of the crane is disabled when the total voltage of the protection system.

The closest to the invention is a method of power system protection and control crane, composed of electronic components and sensors operating parameters of the crane, which consists in storing electrical energy, at least one auxiliary power source, the equipment of this power source sensor parameters crane and use of electrical energy independent source to power the electronics of the sensor [2].

A device for implementing the known method of power system protection and control crane, composed of electronic components and sensors includes at least one Autonomous power supply - galvanic cell galvanic battery, the battery and/or solar cell, is placed in the sensor setting crane and connected to the power supply circuit of the electronic circuit of the sensor [2].

In this technical solution, due to the use of independent sources of supply and the wireless communication channel between the components of system protection and control crane, provided the reduction of wired communication lines and, accordingly, the higher is their reliability and ease of installation of this system on the crane.

However, the application as a stand-alone power sources primary cells and primary batteries leads to complication of the technical maintenance of the system due to the need periodic replacement. When untimely replacement of galvanic cells or batteries is unacceptable reduction of the supply voltage of the electronic circuit of the sensor, which reduces the reliability of the protection system and control valve. Similar disadvantages also has a system with Autonomous power sources in the form of batteries. In this case, due to the lack of automatic recharging, it is also necessary system maintenance - periodic charging of batteries, and their gradual discharge and accordingly, the low stability of the supply voltage of the electronic circuit also lead to reduced reliability of the system.

If in the known technical solution used batteries in combination with solar cells, it also does not eliminate the need for maintenance of the system, because when the crane required periodic cleaning of solar cells from contamination. Late cleaning of solar cells leads to a decrease in the efficiency of their work and thus to an unacceptably high discharge batteries, and to decrease n the reliability of system operation, protection and control of the crane.

In addition, in the known technical solution, because of the limited capacity of batteries, galvanic batteries and accumulators, it is not possible to provide an Autonomous electrical supply those components that provide control power loads, such as Parking light and headlight. This eliminates the possibility of creating a sensor length of the boom without the cable drum, as the drum in protecting cranes traditionally used not only to measure the length of the boom, but also to transfer energy at its tip.

Another disadvantage of the known technical solution is a malfunction of the system protection and control valve when disconnected total voltage of its power.

Technical results, seeks to achieve the proposed solution, are

- expand the functionality of the system protection and control of the crane by providing opportunities electric power marker light, lights working lighting and other electrical loads placed on the boom or on the polyspast crane;

- increase system reliability by eliminating the cable drum while maintaining the possibility of measuring the length of the boom and load management;

- simplification of the unit is a mini-maintenance system protection and control valve due to the automatic recharging stand-alone power source directly in the process of hoisting crane;

- enable system operation disabled when the total supply voltage.

In the proposed method of power measurement and control components of the system protection and control crane, placed on the boom or on the variable geometry mechanism, consisting in the storage of electrical energy in the auxiliary power source, the equipment of this power source specified components of the system protection and control, and using this electrical energy to power electronic circuits, loads and sensors this part of the system, specified technical result is achieved due to the fact that in this way additionally convert the mechanical energy of the moving truck or boom rope hoisting crane or block the sending or supporting the rope, into electrical energy, which pass in an Autonomous power supply, in which its accumulation. As loads are used, in particular, marker light and/or Faro, and as sensors of sensor load cargo or strelba the rope and/or the proximity sensor to the transmission line.

To achieve these technical results indicated integral part of the system protection and control can be additionally equipped with a device for converting solar energy to the AI, energy external mechanical impact or heat energy of the environment into electrical energy that is passed in an Autonomous power supply.

Transfer the measurement parameters crane from the specified components of the system protection and control at its other part, and reverse signaling load management can be implemented using a wireless communication channel. This channel can be used to measure the length of the boom crane, which, in particular, is measuring the time of propagation (transmission) signal over a wireless communication channel.

In the apparatus for implementing a power measuring and control components of the system protection and control crane, placed on the boom or on the polyspast and made in the form of an electronic circuit connected to the sensors parameters crane and load containing the independent source of power connected to the power supply circuit of the electronic circuit, this technical result is achieved in that the device further comprises an electric generator made with the possibility of mechanical interaction with cargo and/or loaded by a rope, or with a block guides or p is derivagem this rope, and with the ability to convert mechanical energy of movement of the rope or block into electrical energy, the generator output directly or through a transformer current or voltage connected to independent power supply, made in the form of a battery or a capacitor.

In this case the electric generator can be performed using electromagnetic induction or piezoelectric effect. As loads can be used overall flashlight and/or headlamp, and as sensors - strain gauge force sensor in the cargo or strelba the rope, the force sensor in the axis of the guide or support unit or proximity sensor to the transmission line.

To achieve these technical results, the device may further comprise a solar energy Converter, or energy external mechanical impact or heat energy of the environment into electrical energy, the output of which is directly or through an additional inverter current or voltage connected to independent power source.

The electronic circuit may include a wireless communications interface, at least one other part of the system protection and control, and measuring the transmission time of a signal is specified on the wireless communication channel, and then calculating the length of the boom crane on the basis of measurement results this time. To facilitate the technical implementation of measuring the length of the boom wireless interface can be performed using radiation of different physical nature for receiving and transmitting data, in particular electromagnetic and ultrasonic radiation.

Sales of electric power measuring and control components of the system protection and control crane, placed on the boom or on the polyspast, with these distinctive features provides automatic charging a standalone power source (battery or capacitor) directly in the process of hoisting crane. This eliminates the need for maintenance of the system protection and control valve in its power and allows you to get the normal value of the electric voltage to the electronic circuits of the system in all operating conditions. This leads to increased system reliability and allows it to work while disconnected from the common power supply voltage, including a faulty on-Board network load-lifting crane.

The conversion of mechanical energy of a moving truck or boom rope into electrical energy on the boom or on the cargo or strelba the variable geometry mechanism allows to obtain a powerful source of energy for the devil is Romagnolo power powerful loads, posted on remote parts of the crane, in particular for power marker light and floodlights attached to the crane. This provides increased functionality of the system protection and control the crane.

Therefore, the distinguishing features of the claimed technical solution are in direct causal connection with the achievement of the following technical results.

Explain the technical essence of the proposed method of power measurement and control components of the system protection and control crane by describing the work of the implementing device.

Figure 1 shows an example functional diagram of the system of protection and management of crane, which has a suggested way of eating. Figure 2 - an example of the placement on the head of the jib crane of the force sensor in strelba the rope and electric generator that converts the mechanical energy of motion of the rope into electrical energy.

System protection and control crane in the General case consists of N (1.1, 1.2 ... 1.N), in the General case, different parts, made in the form of an electronic device carrying out measurement of the operating parameters of the load-lifting crane, information processing and management of the load tap - ispolnitel the mechanisms of actuators, lights working lights, marker lamps, etc. of these components are measurement and control, i.e., as a measurement of operating parameters of the crane, and the management of its loads.

Components of the system can be named controllers, modules, peripherals and control, etc. that does not matter. One of these parts installed in the cabin of the crane and is equipped with controls and display, is used generally as the host or master device system protection and control the crane.

At least one measuring and managing part of this system placed on the boom or on the variable geometry mechanism of the crane and made in the form of analog-to-digital electronic circuit 2 is connected to at least one sensor operating parameters crane 3 and at least one load 4. Load connected to the electronic circuit 2, if necessary, through the output device 5 (power switches, amplifiers and so on). The output device 5 can also be included in the electronic circuit 2.

The electronic circuit 2 is made, usually based on a microcontroller that is connected (or its members) operational and non-volatile (program memory) memory devices and interface the data schema, and also, if necessary, real-time clock, a memory unit Registrar, parameters, etc.

Power electronic circuits 2, sensor 3 and the load 4 (output devices 5) is executed from Autonomous power source 6, is made in the form of a battery or a capacitor.

An integral part of the system 1.1, 1.2 ... 1.N are interconnected using wired or wireless communication channel 7. Accordingly, the composition of the interface circuits of each of the electronic circuit 2 includes a transceiver, a controller, or driver serial multiplex communication channel - CAN, UN, etc. or wireless communication channel, Wi-Fi, Bluetooth, ZigBee and the like, or the communication channel on a separate wire.

An integral part of the system, which is located on the boom or on the polyspast crane, has a predominantly wireless communication channel.

Part of the leading components of the system include controls and/or display 8 (a set of buttons, keys, character and single indicators and the like). If necessary, these bodies can be part of any other system components 1.1, 1.2 ... 1.N.

The sensors 3 can be made in the form of strain gauge force sensor or strain gauge pressure sensors installed in the rod and piston cavities of the lift cylinder, the potentiometric sensor ug is and azimuth and length of the arrows (angle sensor cable drum), micromechanical accelerometer - sensor boom angle sensor proximity to power lines, etc. Required set of sensors 3 and, accordingly, the operating parameters of the crane is to be measured, is determined by the specific design of the lifting crane and the requirements for its protection and management. Amplifier-Converter devices required for the operation of the sensors 3 can be embedded either in the sensors or in the electronic circuit 2, for example, in the form of analog-to-digital Converter of the microcontroller.

Charging a standalone power source 6 is supplied from the electric generator or the energy Converter 9, the output of which is, if necessary, must be converted by the level of the output voltage or current using a current transformer or a voltage of 10 made in the form of the charging unit stand-alone power source 6.

The generator 9 is designed to convert the mechanical energy of the linear displacement of the cargo or the boom rope 11 or rotation of the unit 12-14, directing or supporting the rope, into electrical energy (figure 2). This generator 9 and the sensor 3, in this example, the force sensor in strelba the rope can be placed on the head of the boom 15 crane.

Cargo Kahn is t 11, around the guide pulley 12 mounted on the axis between the cheeks of the head arrows, enters the second guide pulley 14. The rope 11 communicates with the deflecting unit (roller) 13. The force F acting on the block (video) 13 proportional to the force in the cargo rope 10 and is measured using a strain gauge 3 embedded in the axis of the deflecting unit 13.

The drive shaft of the generator 9 directly or through reduction gearing, is connected, for example, with the axis of the guide block 12. The movement of the rope 11 during lifting/lowering valve results in rotation of the block 12 and the drive shaft of the generator and the electric power generation, which directly or through an additional inverter current/voltage 10 enters the power source 6, through its charging. In the end, the mechanical energy of the periodic movements of the rope 11, converted into electrical energy, provides a continuous supply of the electronic circuit 2, the sensor (sensors) 3 and 4 loads the corresponding integral part 1.1...1.N system protection and control of the crane.

Measuring and managing part 1.1...1.N system protection and control valve can be installed in any other part of the crane, in particular on the lower movable holder cargo polyspast 16. is this case the drive shaft of the generator 9 is connected with one of the blocks of the variable geometry mechanism, for example, with a block having the largest speed when lifting/lowering of the load.

The crane is a crane operator by acting on the manual controls actuators crane (on the drawings conventionally not shown) and controls 8. The microcontroller of the electronic circuit 2 components of the system protection and control valve, acting as the Central unit of this system, working on the program recorded in the memory of the microcontroller, after receiving information about the values of the parameters crane and managing the impacts of the operator, generates the control signals crane (with the exception of the control actions generated in manual mode). The control signals on the communication channel 7 receives the output devices 5 parts 1.1...1.N system protection and control valve, by enabling/disabling the corresponding 4 loads (solenoids, lamps etc). At the same time, the Central microcontroller unit determines the current load of the crane and lifting his position (boom) equipment. Allowable loads of the crane for different spatial positions of its arrows are stored in the memory of the Central unit in the form of cargo characteristics of the crane. The area of the valid provisions of the boom system of the crane is entered by the operator using controls 8 when setting modes and parameters to coordinate protection of the crane and is also stored in the memory of the microcontroller of the Central block.

After comparing the actual load of the crane with maximum and comparison of actual position of the boom system with zone settings valid provisions of the Central unit transmits the control signals 4 loads (e.g. solenoid valves), by allowing or blocking the work of the Executive mechanisms of the crane. This provides protection valve overload and coordinate protection.

In some cases, the energy received from the generator 9, is insufficient to power the load 4. This occurs when, for example, crane for a long time is in the transport mode with the included marker lamp, and the operation of lifting/lowering of the load is not carried out and, accordingly, the cargo and : ropes remain motionless. In these cases, the system may use more solar energy Converter, or energy external mechanical impact or heat energy of the environment into electrical energy (in the drawings conventionally not shown). The output of the additional transducer directly or through an additional inverter current or voltage is also connected to a standalone power source 6 and is used for recharging. Principles of construction of such preobrazovala is known to her. For example, the Converter of mechanical energy transport vibrations into electrical energy may be in the form of inertial mass on an elastic suspension with electromagnetic or piezoelectric energy Converter vibrations or movements of this mass into electrical energy.

Implementation is powerful enough the power generator 9 on the head of the boom 15 allows electric powered marker light and headlight work light located on this head, without using a cable drum traditionally used for energy transfer to the head of the boom.

Measure the length of the boom in previously known systems, protection and control of the crane is carried out, usually by measuring the angle of rotation of the cable drum for winding the cable when the extension/retraction of the telescopic boom. In the proposed technical solution, in the case of exclusion of the cable drum, it is necessary to implement alternative methods for the contactless measurement of the length of the boom.

One such method is based on measuring the travel time of signals between the two constituent parts of the system protection and control crane mounted on the stationary and movable sections of the telescopic boom. In this case, these components of the system equipped with the Xia respective receivers/transmitters radiation, which should be implemented as a wireless communication interface between the constituent parts of the system. I.e. the measurement of the length of the boom, it is advisable to combine with data transmission in the system.

In this case, to simplify the measurement of the length of the boom the exchange of data between components of the system can be implemented using radiation of different physical nature. For example, data from the head to the root section of the boom you can use electromagnetic radiation (radio signal), and in the opposite direction of the ultrasonic radiation. In this case, to measure the length of the boom will be used for the measurement of the propagation time of the ultrasonic signal between the component parts of the system protection and control valve. This time, due to the lower velocity of propagation of ultrasound in comparison with the radio signal has a value that is convenient for direct measurement using microcontroller analog-to-digital electronic circuits 2.

From the above it follows that in the proposed technical solution is to increase reliability and simplify maintenance system protection and control valve due to its implementation without the cable drum, as well as expanding the functionality of the system by providing electrical power and control g is baritem lantern, the spotlights and other loads placed on the boom or on the polyspast crane.

Sources of information used in the compilation of the application

1. JP 59074895, MPK B66C 23/90; G05F 1/58, 27.04.1984.

2. EN 2251524 C2, MPK7 B66C 13/18, 15/00, 23/88, 10.05.2005.

1. The method of power measurement and control components of the system protection and control crane, placed on the boom or on the variable geometry mechanism, consisting in the storage of electrical energy in the auxiliary power source, the equipment of this power source specified components of the system protection and control, and using this electrical energy to power electronic circuits and at least one load and one sensor of this part of the system protection and control, characterized in that it further carry out the conversion of mechanical energy of a moving truck or boom rope or block the sending or supporting the rope, into electrical energy, which is passed in stand-alone power source, in which its accumulation.

2. The method according to claim 1, characterized in that used as a load marker light and/or Faro.

3. The method according to claim 1, characterized in that the sensor is used as the load sensor in the cargo or strelba the rope and/or the sensor privlige the Oia to the line.

4. The method according to claim 1, characterized in that the above integral part of the system protection and control is additionally equipped with a device for energy conversion external mechanical impacts, or solar energy, or thermal energy of the environment into electrical energy that is passed in an Autonomous power supply.

5. The method according to claim 1, characterized in that the transmission of the results of measuring at least one parameter of operation of the lifting crane from the specified components of the system protection and control at its other part, and reverse control signal, at least one load is performed with the use of the wireless communication channel.

6. The method according to claim 5, characterized in that the wireless communication channel is used to measure the length of the boom crane.

7. The method according to claim 6, characterized in that the measurement of the length of the boom is carried out by measuring the propagation time of a signal over a wireless communication channel.

8. Apparatus for implementing a power measuring and control components of the system protection and control crane, placed on the boom or on the polyspast and made in the form of an electronic circuit, connected to at least one sensor parameter works Protodyakonov the crane and at least one load, containing the independent source of power connected to the power supply circuit of the specified electronic circuit, characterized in that it further comprises an electric generator made with the possibility of mechanical interaction with cargo and/or loaded by a rope or block, guiding or supporting the rope, and with the ability to convert mechanical energy of the moving rope or block into electrical energy, the electrical output of the generator directly or via the inverter current or voltage connected to independent power source, which is made in the form of a battery or a capacitor.

9. The device according to claim 8, characterized in that the electric generator is designed using electromagnetic induction or piezoelectric effect.

10. The device according to claim 8, characterized in that the load is made in the form of a marker light and/or lights.

11. The device according to claim 8, characterized in that the sensor is made in the form of a strain gauge force sensor in the cargo or strelba the rope, or the force sensor in the axis of the guide or support unit, or the proximity sensor to the transmission line.

12. The device according to claim 8, characterized in that it further comprises an energy Converter external mechanical in the of deistvii, or solar energy, or thermal energy of the environment into electrical energy, the output of which is directly or through an additional inverter current or voltage connected to independent power source.

13. Device according to one of p-12, characterized in that the electronic circuit of the specified components of the system protection and control includes a wireless communications interface, at least one other part of the system protection and control.

14. The device according to item 13, wherein the electronic circuit, at least one part of the system protection and control includes means for measuring the propagation time of signals between the component parts of this system at the specified wireless communication channel, and then calculating the length of the boom crane on the basis of measurement results this time.

16. The device according to 14, wherein the wireless interface of the electronic circuit components of the system protection and control crane performed using radiation of different physical nature for receiving and transmitting data, in particular electromagnetic and ultrasonic radiation.



 

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23 cl, 1 dwg

FIELD: materials handling facilities; crane safeguards.

SUBSTANCE: invention relates to overload and damage protection of load-lifting cranes and cranes-pipelayers. Proposed method comes to adjusting at least one signal in at least one load measuring channels and/or reach, and/or luffing angle to provide correspondence of safeguard switch off characteristic to preset load characteristic of crane by adding and/or multiplying results of direct or indirect measurement of at least one of crane operating parameters and signals corresponding to adjustment parameters whose values are stored in non-volatile memory of safeguard. Values of adjustment parameters are determined to provide independent switching off characteristic of safeguard from direction and/or speed of boom movement or speed of movement of crane load gripping members. Different adjustment parameters for different directions and/or speeds of boom and/or load-gripping member can be set.

EFFECT: simplified mounting and servicing of safeguards on crane, improved accuracy of realization of protection functions.

18 cl, 2 dwg

FIELD: mechanical engineering; load-lifting equipment.

SUBSTANCE: invention relates to overload and damage protection device of load-lifting cranes and pipelayer cranes. Proposed method comes to adjusting at least one signal in load measuring channels and/or reach, and /or angle of boom tilting by adding and/or multiplying said signal with at least one signal corresponding to at least one adjusting parameter whose value is preliminarily determined and kept in nonvolatile memory of safeguard. Signal is adjusted at no load-gripping member of load-lifting crane at zero value of mass of lifted load or load moment in lifting crane load limiting channel. For this purpose value of at least one of said adjusting parameters is determined at no load on load-gripping member of load-lifting crane.

EFFECT: improved accuracy of safeguard and efficiency of protection of load-lifting crane.

10 cl, 1 dwg

FIELD: materials handling facilities.

SUBSTANCE: group of inventions relates to devices for checking condition of safeguards of load-lifting machines and reading parameters of built-in parameters recorders. Proposed method comes to revealing output signals of separate components of safeguard and transmitting signals to control device, processing signals and their recording in control device according to prestored signals determining sequence of processing and recording and forming, by control device, in case of necessity, replacement test signals in compliance with prestored signals determining sequence of forming of replacement test signals and transmitting the latter to separate components of safeguard. Revealing of output signals and forming of replacement test signals is done by receiving and transmitting sequential digital signals by multiplexed communication line at asynchronous or synchronous modes by algorithms specified by sequential protocols. Proposed device to control safeguard of load-lifting machine contains control unit, data input-output module and memory module. Data input-output module is made in form of transceivers of multiplexed communication line CAN, LIN, RS-232, USB or IrDA of interface. Group of invention provides both control of safety of safeguard and reading of data of built-in parameters recorder making it possible to reveal troubles of connecting bundles, control and diagnosing of condition of safeguard directly on load-lifting crane, improve safety of crane at partial failures of safeguard owing to automatic or manual program disconnection and subsequent replacement of any defective functional unit of safeguard without its physical disconnection and without complete disconnection of partially failing safeguard.

EFFECT: improved control of safeguard.

12 cl, 1 dwg

FIELD: materials handling equipment.

SUBSTANCE: invention relates to methods of protection of boom load-lifting cranes and pipelayer cranes from overloads and damage. Adjustment is carried out by lifting calibrated load of preset mass in points of load characteristic with known parameters of boom equipment and regulating signals in load, reach and/or boom tilt angle measuring channels to provide correspondence of safeguard characteristic to preset load characteristic of crane. In process of regulation of signals in load, reach and/or boom tilt angle measuring channels, values of output signals of corresponding sensors are kept constant and regulation is done by adding and/or multiplying output signals from sensors and signals corresponding to adjusting parameters. Values of the latter are preliminarily determined and kept in nonvolatile memory of safeguard.

EFFECT: reduced labor input in adjustment of safeguard on load-lifting crane, provision of interchangeability of all components, possibility of adjustment of device on any type of load-lifting crane with unspecified mounting of load sensor.

6 cl, 2 dwg

FIELD: mechanical engineering; materials handling facilities.

SUBSTANCE: invention can be used in load-lifting crane control and protection system. Proposed protection system of load-lifting crane contains digital calculator 1, external memory 2, actuator unit 3 and crane parameter pickups 12 - 14. Digital calculator contains boom reach calculating unit 5, unit 6 to calculate load on load-lifting member, torque metering unit 7, three comparators 8, 9 and 10 and OR gate 11. Outputs of crane parameters pickups are connected to first input of digital calculator, and external memory is connected to second input. Corresponding input of actuator unit are connected to first and second outputs. Invention provides safe and effective operation of crane at small reaches owing to disconnection at overloads the motion which might lead to rise of load. Moreover, requirements to accuracy of calculation of load on hook at operation in zone of large reaches are reduced.

EFFECT: simplified production and reduced cost of operation and maintenance of protection system.

2 dwg

FIELD: mechanical engineering; lifting and transportation equipment.

SUBSTANCE: invention relates to protection devices for load-lifting machines used in construction engineering. According to proposed method, by successive polling of signals of first complex of pickups by data processing base unit and by transmitting of commands through drum with current carrying ring to controller of extendable part for connection of technical devices and receiving information from second complex of pickups, drives of load-lifting machine mechanisms are switched off when actual characteristics exceed tolerable values. Provision is made for connecting current-carrying ring of drum through marker light switch of one terminal of supply source whose second terminal is connected with metal structure of load-lifting machine.

EFFECT: enlarged functional capabilities of load-lifting machine, provision of convenient and reliable transmission of commands for selective connection of devices arranged on extendable part and reception of information from pickups arranged on said part.

7 cl, 2 dwg

FIELD: mechanical engineering: materials handling facilities.

SUBSTANCE: invention can be used in control and safety systems of boom-type load-lifting cranes. Proposed system contains main controller to outputs of which input of emergency signaling module, first control input of travel motion interlock module, dangerous voltage protection unit and maximum height pickup of load grip whose output is connected to information input of main controller. System contains boom head controller and pickup of load grip lowering mechanism, and travel motion interlock module is provided with second and third control inputs. Boom head controller is connected by two-way communication line with dangerous voltage protection unit and is connected with main controller by two-way or wireless data exchange channel. Connected to second and third control inputs of travel motion interlock module are, respectively, maximum height pickup of load grip and pickup of load grip lowering mechanism.

EFFECT: improved safety under abnormal conditions owing to preservation of function of limiting of hook maximum lifting height at interlocking of functional of disconnection of crane travel motion by main controller.

8 cl, 4 dwg

FIELD: mechanical engineering; load-lifting and transporting facilities.

SUBSTANCE: according to proposed method, drives of mechanisms providing operation of crane equipment are started and cut off by action onto crane controls. In proposed method, use is made of wire rope angular position sensor. Hook holder is suspended from said wire ropes. Signal from said sensor is compared with tolerable value. To control tension of load wire ropes, load is measured and change in wire rope tension is calculated which is compared with signal of tolerable level of change. At no change of wire rope tension before starting load lifting or when load is lifted from ground, possibility of lifting mode is provided, and at change of tension of wire ropes. Load lifting from ground and angular displacement of boom in vertical plane for constant holding of wire ropes in vertical position are provided. Direction of boom shifting is determined by direction of angular deflection of wire ropes detected by three-position comparator, and at displacement of boom lowering or weakening of wire rope tension is provided. If crane operates with girder boom, travel of trolley is checked for maintaining wire ropes in vertical position.

EFFECT: improved reliability.

4 cl, 1 dwg

FIELD: mechanical engineering; load-lifting cranes.

SUBSTANCE: invention can be used in control and protection system of load lifting cranes to preclude overloads and damage in crane mechanisms. Proposed system consists of separate parts made in form of at least one electronic unit and pickups measuring parameters of load-lifting crane. To supply electronic circuit of any component of safety system use is made of self-contained supply source which is constantly or periodically charged. Conversion of mechanical energy of load or boom rope, or energy of measured parameter of operation of load-lifting crane, mechanical energy of measured load in boom or load rope, angle of azimuth length of boom, etc or hydraulic energy of measured pressure in hydraulic cylinder or in hydraulic boom lifting/lowering motor, load-gripping member or slewing platform of load-lifting crane or energy of external mechanical, acoustic or heat ambient medium onto parameter pickup of load lifting crane into electric energy is provided.

EFFECT: simplified servicing, improved reliability, provision of serviceability of safety system at cut off supply.

23 cl, 1 dwg

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