Safety system of electrically driven hoisting machine

FIELD: transport.

SUBSTANCE: proposed system comprises digital computer with memory, hoisting machine parametre pickups connected to digital computer data inputs and incorporating at least one pickup of load and/or hoisting machine components spatial position, and/or machine drive speed. It comprises also device to measure supply voltage parametres connected to digital computer and actuator unit coupled with hoisting machine control system and digital computer. Digital computer can compare measured parametres of supply voltage with tolerable values stored in memory and generate inhibit instructions in case supply voltage parametres fall beyond tolerances. Digital computer and actuator unit generate signal to cut off separate drives of hoisting machine in case supply voltage parametres fall beyond tolerances for machine drives and control system.

EFFECT: higher safety, efficiency and reliability.

9 cl, 1 dwg

 

The invention relates to the field of lifting and transport machinery and can be used in systems for the protection and management of load-lifting machines with electric drive.

Lifting machine, according to the standard industrial safety requirements, equipped with appliances and security systems to limit their working movements, limiting the carrying capacity or load moment for fall protection cargo and arrows at the breakage of any of the three phases of the mains, etc.

Famous crane cover type E (DC) and type In (AC), which measure voltage and current on three phases. They provide disconnection of the motors drives the lifting machines (cranes) at short circuit, invalid overload, invalid asymmetry of mains voltage and lower than the acceptable limit [1].

Their disadvantages include:

- the inability to control the parameters of the supply voltage (u pit) for relay automatic lifting machines, as these panels provide the only protection for the motors. This is due to the presence of conflicting claims to the voltage level for certain types of electrical equipment hoisting machines. For electric motors Pets, as a rule, the distortion of f is C to 0.7 ulo, where UN is the nominal voltage, and a symmetric voltage reduction to 0.5 ulo, and of relaying the permissible range of supply voltage is typically in the range 0,9U<u pit<1,1U;

- the inability to determine the specific phase, in which there is misalignment. For this reason, short-term voltage drops disables all drives of hoisting machines with superimposed brakes, including drives its rotation and movement, which in itself can lead to an emergency situation, in particular, due to swinging of the cargo when stopping;

- no registration required voltage level. When blocking tripping circuits crane panel by the operator or service personnel by unauthorized closure of its Executive contacts, with the subsequent removal of this lock, it is impossible to objectively determine why the accident occurred hoisting machines.

Also known safety system hoisting machine (crane), a digital computing unit, to the information input of which is connected to the sensors of the machine parameters, including the speed sensor of the motor shaft of the lifting mechanism of the cargo, the current sensor supply network and the sensor phase mains voltage, timer, display units, the block I inform the tion and the Executive block. This system contains an external storage device is connected to the digital computing unit two-way channel for the exchange of data and configured to store data about the maximum permissible values of the parameters of the mains [2].

Disabling lifting mechanisms on signals from the current sensors and the phase voltage of the supply network allows for more effective protection of the hoisting machine from hazards.

However, this system suffers from the same disadvantages as the crane panel.

The closest to the invention is a security system lifting machines (cranes) with electric drive containing digital computer (computing unit), to the information input of which is connected to the outputs of the sensors parameters of the crane and to the outputs - Registrar settings of lifting machine with timer real-time, block a visual indication that the unit alarms and Executive block. This system contains an external storage device is connected to the digital computing unit two-way channel for the exchange of data and contains information about the maximum allowable values of the parameters of the supply voltage for the control system and for the individual drives of hoisting machines. The system also includes measuring parameters Pete the subsequent voltage electrical hoisting machine, the outputs are connected to the supplementary information to the digital inputs of the computing unit, Registrar settings of the crane and block visual indication. When the system digital computing unit compares the measured values of the supply voltage with valid parameters of this voltage to the control system of the lifting machine, and generates signals to ban all lifting movements of the machine when the deviation is within the permissible limits. This block also performs the comparison of measured parameters supply voltage with its valid values for drives of hoisting machines and, in the case of their permissible values, generates signals disable certain types of movements of the hoisting machine while forming light and sound warning signals [3].

This system is also check settings hoisting machine and separate formation signals disable the control system and actuators lifting machines at different values of the supply voltage, thereby increasing the safety of hoisting machines.

However, this increase security significantly enough, because in this system is carried out simultaneously disconnect all drives, grusome yemei machine when the supply voltage parameters of the control system for the specified range.

As mentioned above, for electric motors Pets, as a rule, the phase distortion to 0.7 UN and symmetrical voltage reduction to 0.5 ulo, while relay automatics are designed for a narrower range of supply voltage, for example, in the interval 0,9U<u pit<1,1U.

When the parameters of the supply voltage exceeding the permissible limits for the control system, known in the security system is a power management system that makes it stop at the same time all the drives of hoisting machines. However, the fact that the motors can operate at a significant phase distortion and significant symmetrical voltage reduction (up to 0.5 ulo), does not matter, because the system power-off control turns off all power contactors (starters) and, accordingly, to stop all the drives of the machine.

Simultaneous stopping of all the drives of hoisting machines with superimposed brakes leads to the summation of the dynamic loads caused by the stop of each drive individually, and consequently may lead to accident hoisting machines.

This stop can occur at those points in time when the movement of the actuator is directed downward load (for example, when the standpipe is Sri cargo) or in a side collision prevention equipment machine with any obstacle (for example, deleting a lifting machine or its arrows from obstacles, moving in her direction). This stop can also create an emergency situation.

In a moment of relief from the hoisting machine can move with high speed and with a load large enough mass. In this case, the sudden stop of the drives can also lead to an emergency situation, both due to high dynamic loads on the machine and swing the cargo during a sudden stop.

The maximum permissible values of the supply voltage, at which the disabling of the control system and actuators of the machine, known in the security system are installed without regard to the load and speed modes of operation of the lifting machine. This leads to unnecessary disabling of the control system and actuators in cases where, for example, due to a light load or low speed machine equipment, reducing the supply voltage can lead to malfunction of the actuator. Doing so also reduces the safety of hoisting machines.

Unnecessary emergency stop actuators and control systems lead to downtime of hoisting machines and thus to reduce the performance of its work.

To the ome, storage of maximum permissible values of the supply voltage in this security system is in an external storage device connected to the digital computing unit two-way channel of communication.

It is known that the reliability of electronic devices largely depends on the number and design of electrical connections. The smallest number of failures observed during the implementation of the compounds of the storage device with a digital computer directly on the crystal inside the chip, for example a microcontroller.

In the known system, due to the use of external storage devices, a reduction in reliability due to the presence of solder mass storage device with a digital computing unit, as well as due to the presence of failures in digital transmitter, caused by electrical interference resistance on the connection line. Such interference, impairing the performance security, in particular, often lifting machines it with an electric drive. Their consequence is to reduce the reliability and efficiency of the security system and, accordingly, decrease the safety of operation of the machine.

Technical results, seeks to achieve the invention, are the I:

- improving the safety of hoisting machines by eliminating unnecessary shutdowns of its individual drives with variations of the supply voltage and when exposed to electrical noise, distorting read from the storage device, the maximum permissible values of the supply voltage;

- improving the performance of load-lifting machines by reducing the downtime caused by the unreasonable outages;

- increase system reliability and security by combining the digital computing unit (transmitter) and a storage device.

Security hoisting machine with electric drive containing digital computer, to the information input of which is connected sensors parameters hoisting machine including at least one load sensor, and/or the spatial position of the lifting equipment of the machine, and/or the speed of the actuator, and a device to measure parameters supply voltage its electrical storage device and the Executive unit connected to the drive control system of the lifting machine with a digital computer, which is configured to compare the measured parameters supply voltage with a valid, written to remember the m device, and with the possibility of generating signals prohibition movements of the lifting machine when the deviation of the supply voltage within the acceptable levels specified technical result is achieved due to the fact that the storage device is made as an integral part of the digital computer, digital computer and the Executive unit is configured to generate signals disable individual drives of hoisting machine when the deviation of the supply voltage within the acceptable levels for drives of hoisting machine and its control system.

In this system, to achieve these technical results, in particular:

in the storage device is written to a different value of the supply voltage parameters for the individual actuators lifting machines, as well as different values lower tolerance parameter supply voltage for control system installed, respectively, of the trigger conditions and hold in the on state of the electromagnetic relay of the control system. Digital computer in the last case is made with a choice of applicable value depending on the consequences of reducing the supply voltage of the control system is the absence of actuation or nesanktsionirovanno the th off, at least one electromagnetic relay;

- digital computer is based on a microcontroller that contains a processor, a storage device for storing data and programs of his work, the clock generator and peripherals;

the security system further comprises at least one current sensor, at least one electric motor connected to a digital computer is further configured to protect the motor in case of absence of at least one of the phases, reducing the supply voltage below an acceptable level, invalid asymmetry voltage on the motor and/or break in the neutral wire;

the security system further comprises Registrar settings of lifting machine with a real time clock, the operator panel and the unit alarms, which are made in the form of a separate device or part of the digital computer;

- each device parameter measurement voltage electrical hoisting machine made in the form of series-connected divider, integrator and an analog-to-digital Converter whose output is the output of the meter.

The values of allowable parameters supply voltage, in order to achieve the above t is hanicheskih results may be recorded in a storage device different for different values of the output signals of the sensors parameters hoisting machine or for different values of freight time of departure, the speed of rotation of the machine, the speed of the lifting/lowering, speed lifting/lowering of the boom and/or other parameter, generated or calculated using the output signals of these sensors. Digital computer can be made to perform a comparison of measured parameters supply voltage permissible with additional additive and/or multiplicative transformation, at least one of the compared values using the parameters (coefficients) of this conversion set (calculated) based on the output signals of the sensors parameters hoisting machine or of the value of freight time of departure, the speed of rotation of the machine, the speed of the lifting/lowering, speed lifting/lowering of the boom and/or other parameter, generated or calculated by using an output signal of at least one of these sensors. When this additive conversion involves the addition or subtraction of one of the compared values with a coefficient (parameter) this transformation, multiplicative - its multiplication.

The realization of the situation of these features of the invention eliminates unnecessary emergency stop actuators lifting machine with variations of the supply voltage and when the effects of electrical noise from these drives, to increase the productivity of the machine by reducing it downtime and increase system reliability and security by eliminating external connection digital computer and a storage device. Accordingly, these characteristics are in direct causal relationship with achievable technical results.

The drawing shows a functional diagram of the security system.

The security system includes a digital computer 1 that is implemented mainly by the microcontroller 2 and includes a storage device 3, the Registrar settings of lifting machine with a real time clock 4, the operator panel (driver) 5, block alarm 6, the Executive unit 7, the sensor parameters of the hoisting machine 8, including, in particular, the load sensor 9, the sensors in the speed of the actuator 10, the displacement sensors 11 (for example, displacement transducer lifting machine (crane) crane path, the sensor moving cargo truck (carriage) along the guide belts arrows, gauge the length of the boom and so on) and, optionally, other sensors (azimuth angle, boom angle, proximity to power lines, maximum lift hauling, etc.), conventionally not shown in the drawing, and measuring devices line parameters e.g. the supply of the electric machine 12.

Digital computer 1 may be a single unit or multi-unit performance and contains at least one microcontroller 2. Its a separate unit may be cited as the controller, the data processing unit, a display unit, information and control or computing unit, etc. that does not matter.

The microcontroller 2, in addition to the storage device 3 to store data and programs may contain, in particular, the processor clock and peripheral devices.

The digital transmitter device 1 contains coordination with the sensors of the machine parameters 8 and the measuring device parameter supply voltage 12 embedded in the microcontroller 2 or made as a separate unit and connected to it (in the drawing conventionally not shown).

The sensors parameters hoisting machine 8 and the device (s) measurement voltage 12 to the digital computer 1 can be performed by a multiplex channel of communication (CAN, LIN, etc) or using separate wires.

Registrar settings of lifting machine with a real time clock 4, the operator panel 5, block alarm 6 and, if necessary, other functional blocks of the system security is, made as a separate device or part of the digital computer 1. The logger parameters with real-time clock 4 may be part of the microcontroller 2.

The operator panel 5 is made in the form of a set of controls (buttons, switches, keys and indicator LEDs and digital, alphanumeric and/or graphical indicators, mainly liquid.

Executive (closed) unit 7, is made, in particular, in the form of multi-channel electronic or relay power amplifier (block output relays). It may contain a microcontroller and means for connection to a digital computer 1 via separate wires, separate multiplex communication channel, or a single multiplex communication channel, designed, including, for connecting sensors parameters hoisting machine 8.

The sensors 8, which may be referred to the peripheral recording devices, peripheral controllers, measuring devices, etc. placed in different zones of hoisting machines and include analog sensors with analog-to-digital converters and digital sensors. Analog sensors measure the smoothly changing parameters of hoisting machines and used to measure sensitive items about itionally output signal. Digital sensors measure the discrete parameters of the lifting machine.

Each meter parameters supply voltage electrical hoisting machine 12 includes, in particular, connected in series divider, integrator, an analog-to-digital Converter and device matching with the transmission line. The outputs of the probes 12 is connected to the digital computer 1 by means of a separate communication lines or multiplex channel of data exchange, in particular, the common multiplex channel sensors 8.

The system works as follows.

Before you begin hoisting machine operator using the operator panel 5 introduces the security settings of the parameters of the coordinate protection and boom system, number of hoist winch part of the polyspast and other parameters, if their input included in the construction of lifting the machine or system protection and control.

Using this panel in the security system can also enter the maximum allowable values current in phases, "skew" (asymmetry) of the phase values of the phase voltage and other voltage for each actuator lifting machine and its control system. The entered parameters are saved in the storage device 3.

When lifting machine on tchiki 8 provide measurements of the parameters, characterizing the load lifting machine (via the load sensor 9) and the position of her lifting equipment. Values of measured parameters from sensors 8 are transmitted in digital computer 1, which, working on the program, particular when designing security systems and pre-recorded in the storage device 3 of the microcontroller 2, compares the actual load lifting machine with the maximum allowable, as well as comparing the actual position of the lifting equipment from the zone of acceptable provisions specified by using the operator panel 5. Digital computer 1, depending on the results of these comparisons, gives the Executive unit 7 signals to allow or deny certain types of movements of the lifting machine. At the same time using the operator panel 5 and unit alarms 6 for the driver are formed the necessary information and warning signals. Because of this, protection is lifting the machine from overload and from collisions with obstacles (coordinate protection).

Parameters supply voltage actuators and control system of the lifting machine is determined by the measuring devices 12 and fed to the microcontroller 2 digital transmitter 1. The microcontroller 2 implementing TVset comparison the current levels of parameters supply voltages of the individual drives of hoisting machine and its control system with maximum permissible levels, recorded in the storage device 3. If the permissible maximum and minimum levels, the microcontroller 2 digital transmitter 1 generates signals prohibition of certain movements of the hoisting machine, which, through the Executive unit 7 receives the control system of the lifting machine and disables its individual drives.

For the various drives of the lifting machine in the storage device 3 is recorded for different values of permissible parameters supply voltage. Their values are determined when designing a security system or hoisting machine and depend on the functionality of an actuator and, accordingly, the degree of danger it off.

In the low voltage of the induction motor drive hoisting machine reduces torque on its shaft and accordingly the size of its maximum point, called the critical (MCR). If the torque applied to the shaft of the asynchronous electric motor exceeds the MCR, is the so-called "rollover", which is manifested in a sharp reduction in its speed and torque.

This "rollover" without applying the brakes, actuators lifting and changes to departure may result in an accident - falling load or boom due to rscr is zivania motors under load. At the same time "rollover" electric motor drives the movement and rotation of the hoisting machine more secure. Therefore, the lower limit value of the supply voltage for the motor lift and change the departure is set at a higher level than for motor movement and rotation of the machine.

The control system of the lifting machine, generally contains relay-contact device. Voltage operation of electromagnetic relays (contactors, contactors, etc.) significantly exceeds the voltage retention in an enabled state. This gives the opportunity to implement a differentiated approach to the choice of the lower limit values of the supply voltage for the control system. It lies in the fact that the digital transmitter 1 carries out the analysis of the state of the electromagnetic relay of the control system and selects the appropriate valid value for the voltage supply of the control system depending on the consequences of this decline is the absence of actuation or unauthorized disabling at least one electromagnetic relay.

In addition to the protection of hoisting machines from accidents, security is implemented protection of electric motors, in particular, from overheating. When the specified control parameters supply voltage is agenia, in General, controlled not only the value of the supply voltage for individual phases, but also the absence (open circuit) at least one of the phases, invalid asymmetry voltage on the motor and open circuit neutral wire. When implementing these functions of protective switching-off of electric motors can optionally be used current sensors that are installed, in particular, in certain phases of the motor (in the drawing conventionally not shown).

To increase the effectiveness of the protection of hoisting machines and improve its performance, the value of the supply voltage parameters can be recorded in the storage device 3 is different for different speed and load modes of operation of the hoisting machine, which is determined using the sensor parameters of the machine 8.

If, for example, hoisting machine performs lifting and moving cargo low mass or low speed, the load it drives small. In this case, the security system allows for significant deviations of the marginal values of supply voltages (voltage, phase imbalance, and so on) from the nominal (normal).

To do this, in the storage device 3 stores the values of the limiting values parameter supply voltage for different values of the output signals is tchikov parameters hoisting machine or of any parameters, calculated by the digital computer 1 using the signals of these sensors (load moment of departure, the speed of rotation of the machine, the speed of the lifting/lowering, speed lift/lower arrows etc). To reduce the amount of memory in your storage device 3 digital computer 1 can also change levels shutdowns drives of hoisting machine parameters supply voltage at different speed and load modes of operation of the hoisting machine by converting the compared current or limiting parameters of this tension.

All kinds and directions of movements of the lifting machine, the levels of load and parameters supply voltage of the microcontroller 2 digital transmitter 1 is transmitted in Registrar settings of 4 and recorded it in real time for further monitoring and analysis of load-lifting machines. This allows you to carry out routine maintenance and increases reliability and safety of its work.

In the digital block 1 is also determined by the approximation of the hoisting machine to the maximum load, approaching its equipment to any boundary position, in particular, coordinate the protection, as well as the approximation of any parameter supply voltage to its limit in which owny, display information about this on the operator panel 5, and by issuing unit 6 warning signal for the driver. This provides the possibility of acceptance by the engineer measures to prevent exceeding these levels and thus also increases the safety of hoisting machines.

The claimed security system lifting electric cars can be manufactured with the use of modern components and technology. The invention allows for various options to implement this system on the basis of the characteristics set forth in the formula.

Sources of information

1. Ushakov NS electric Bridge cranes. - 4th ed., perab. and extra - L.: engineering, 1980. - str, 188.

2. EN 41460 U1, B66C 23/90, 27.10.2004.

3. EN 2333881 C1, B66C 13/18, B66C 23/88, 20.09.2008.

1. Security system lifting machine with electric drive containing digital computer with a memory device, the sensor parameters of the lifting machine, connected to information inputs of the digital computer and includes at least one load sensor and/or the spatial position of the lifting equipment of the machine, and/or the speed of the drive device for measuring parameters supply voltage electrical hoisting machine, connected to digital Vacha is slitely, and the Executive unit, coupled to the control system of the lifting machine, and a digital computer, which is configured to compare the measured parameters supply voltage with a valid, recorded in a storage device and with the possibility of generating signals prohibition movements of the lifting machine when the deviation of the supply voltage within the acceptable levels, wherein the digital computer and the Executive unit is configured to generate signals disable individual drives of hoisting machine when the deviation of the supply voltage beyond the various allowed values of these parameters for the various drives of hoisting machine and its control system.

2. The security system according to claim 1, characterized in that the storage device is written to a different value of the supply voltage parameters for the various drives of hoisting machines.

3. The security system according to claim 1, characterized in that the storage device is written to a different value of the lower allowable voltage control system installed, respectively, of the trigger conditions and hold in the on state of the electromagnetic relay of the control system and digital computer made with available the STU select the appropriate valid values depending on the consequences of reducing voltage system power management - no operation or unauthorized disabling at least one electromagnetic relay.

4. The security system according to claim 1, wherein the digital computer is based on a microcontroller that contains a processor, a storage device for storing data and programs of his work, the clock generator and peripherals.

5. The security system according to claim 1, characterized in that it further comprises Registrar settings of lifting machine with a real time clock, the operator panel and the unit alarms, which are made in the form of a separate device or part of the digital computer.

6. The security system according to claim 1, characterized in that the measuring device parameter supply voltage electrical loading means includes serially connected divider, integrator and an analog-to-digital Converter.

7. The security system according to claim 1, characterized in that it further comprises at least one current sensor, at least one electric motor, the output of which is connected to a digital computer is further configured to implement the functions of the signal formation of protective switching-off of the electric motor in the absence of at least one of the phases and/or with whom igenii supply voltage below an acceptable level, and/or invalid asymmetry voltage on the motor, and/or break in the neutral wire.

8. The security system according to any one of claims 1 to 7, characterized in that the value of the supply voltage parameters recorded in a storage device different for different values of the output signal, at least one of the sensors parameters hoisting machine or for different values of freight time and/or departure, and/or speed of rotation of the machine, and/or speed lifting/lowering of the load and/or speed lifting/lowering of the boom, and/or other parameter, generated or calculated by using an output signal of at least one of these sensors.

9. The security system according to any one of claims 1 to 7, characterized in that the digital transmitter is adapted to compare the measured parameters supply voltage with a valid, additionally made with the possibility of implementation of this comparison from additive and/or multiplicative transformation, at least one of the compared values using this transformation, at least one factor of this transformation-dependent output signal, at least one of the sensors parameters hoisting machine or of the value of freight time and/or departure, and/or speed of rotation m of the tire, and/or speed lifting/lowering of the load and/or speed lifting/lowering of the boom, and/or other parameter, generated or calculated by using an output signal of at least one of these sensors.



 

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1 dwg

FIELD: machine-building.

SUBSTANCE: invention related to device versions for using in hoisting machines control and protection systems. Detector has an activator with constant magnet, installed with rotation ability in case of controlled device displacement, two sealed contacts, installed with ability of actuation under constant magnets field effect, in order defined with magnets circular displacement or rotation direction, output device and self-contained power supply source, connected to the sealed contact first outputs. According to first version device contains diode-condenser block and micro controller. Micro controllers output/input connected to input or bi-directional output/input of the output device. The second sealed contacts outputs connected to the micro controller inputs via the diode-condenser block, and diode-condenser block executed with ability of micro controller supply voltage generation or control of this supply. According to the second version the second sealed contacts outputs connected, directly of via filtrating chains, to micro controller outputs, which supply outputs connected to the self-contained power supply source.

EFFECT: bigger time interval betwen technical maintainance procedures, safety during increase hoisting machine operation, detector lifetime increase.

25 cl, 2 dwg

FIELD: load lifting equipment.

SUBSTANCE: proposed device comprises machine operator work station, machine hydraulic or electric drives incorporating control elements connected to operator control instruction transmission means. The latter included control handle and safety electronic device to lock machine drives, if required. In compliance with first version, device comprises one control handle angular position/travel rate pickup, while one safety device input and output are connected to one output of said pickup and one input of hydraulic system unloading means. In compliance with second version, device comprises operator hand motion and/or spatial position pickup built around micromechanical accelerometre, or capacitative, or ultrasound, or radio-wave metre, while safety device input and output are connected with pickup output and one input of hydraulic system unloading means or other means of interlocking machine hydraulic drives. In compliance with third version, device comprises at least one permitted manual control member travel direction indicator, while one safety device output is connected with one input of indicator. In compliance with fourth version, device comprises pickups of drive control member travel and/or drive control elements, together with safety device, allows wireless data transmission from pickups to proposed device.

EFFECT: higher reliability and safety.

23 cl, 1 dwg

FIELD: transport.

SUBSTANCE: proposed control system contains the onboard microprocessor control unit with actuators connected thereto, crane operating parameters pickups and controls. The proposed system incorporates means identifying lifted and moved cargo representing a reader of bar codes applied on the cargo, or a radiolabel attached to the cargo, to allow locking the cargo, exceeding the crane lifting capacity, lift and move. The system can contain cargo position pickups to automatically guide the tool to be clamped to the cargo. In compliance with the second version, manual input of the identifier or cargo parameters into this system, and, if required, the coordinates of a final point cargo transfer cargo. Note here that the system incorporates appropriate means preventing the crane overload and optimising cargo transfer trajectories. In compliance with the third version of the control system, the said system can block releasing the cargo from the clamping tool depending on current value of the crane load, speed of move and/or spatial position. In compliance with the fourth version, the control system is equipped with wire or wireless means of transmitting signals from a person, outside the load-lifting crane, to the onboard microprocessor control unit for them to be converted into warning light and/or sound data signals and/or to signals blocking the crane motion.

EFFECT: increase in safety of crane operation, its efficiency and ease of control.

24 cl, 1 dwg

FIELD: transport.

SUBSTANCE: method envisages preliminary determining or setting of admissible values of parameters characterising loading and/or attitude position of outrigger or crane cargo-handling device, memorising this data, measuring of these parameters during crane operation, comparing of measured values with admissible values, and further forming of control signals or blocking of control by execution units in order to prevent exceeding of admissible values. Prior to commencement of crane work or in process of lifting and movement of cargoes crane-operator additionally performs preliminary visual control of crane operation condition or presence of people along way of crane or cargo movement or automatic control of correctness of slinging (securing) of cargo, or automatic check of correctness of crane installation on outriggers or optical measurement of crane performance parameters or automatic change of coordinate parity parameters using GPS receivers, radio-frequency or inertial determination of position devices located on obstacles, clothing or equipment of people. Results of this check or control ensue implementation of additional control or information signals.

EFFECT: enhancement of safety of crane operation and of crane efficiency.

24 cl, 1 dwg

FIELD: transport.

SUBSTANCE: system contains hydraulic, electrohydraulic and/or electric drives of crane mechanisms, control device for these drives, and fuel supply control device connected to it. In process of crane operation automatic fuel supply change is performed depending on load position and/or speed of cargo relocation. In second version of system fuel supply change is automatically related to approach or touch of crane operator's hand to drive control handle. Drive control is made as control unit containing control handle, handle position sensor, and controller with outputs connected immediately, or via additional output device, to control drives' inputs and to device controlling fuel supply. Level of fuel supply in general case is different for different drives and directions of crane movement. After handles of crane drive control are returned to neutral position or after hands are removed from handles, value of motor angular velocity is preserved within preset interval after which minimum preset velocity of motor blank cycle is automatically established.

EFFECT: decrease of specific fuel consumption, efficiency increase, enhancement of usability of crane control and of safety of its operation.

17 cl, 2 dwg

FIELD: transport.

SUBSTANCE: system contains electronic module made on basis of microcontroller with attached device for information input-output, display device, protection system controls located outside electronic module, and execution unit, and cargo-hoisting machine performance sensors connected with device for information input-output. Protection system controls and electronic module perform changing type of display of machine performance indicators and changes in both parameters and performance mode of work of machine protection system - scheduling sequence of telescopic boom sections extension, permitting/forbidding lifting operations mix, release of blocking of movement of cargo-hoisting machine in respect of overload and , blocking of cushioning of machine carrier, cargo-hoisting mechanism mode of braking, or boom extension change, position of bracing jack, etc. Display device may be located outside electronic module and it is made as graphic display.

EFFECT: safety enhancement.

13 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: crane protection system contains working conditions transmitters, actuator and data-control unit made on the base of microcontroller with possibility of wire or wireless connecting to it above mentioned transmitters and actuator and with possibility for actuator to generate control signals aimed to prevent working conditions to exceed their permitted values. In the system parameter is revealed for which permitted value exceeding is the most probable at current time, whereupon priority limiting of this parameter value. To do so, the main load carrying member of crane is determined or inhibition of it's stability under working conditions margin is revealed. In the second version of protection system, warning, detection and/or correction of operator wrong actions during setting parameters for jib equipment and/or support contour is performed. In the third system version, changing of permitted values for crane operation parameters is provisioned depending on error of used transmitters.

EFFECT: improvement of operation safety for lifting crane; reducing the value of its travels after achieving the rating value for any parameter and blocking the crane movements by protection system; increase of this system reliability and reduction of requirement to transmitters accuracy.

25 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to handling machinery and can be used in the systems of control and protection of climbing cranes. The safety system incorporates digital computing unit (1) with its data inputs receiving, via a data exchange multiplexer channel, the outputs of the crane parameter recording peripherals (71...7m) comprising, at least, one crane equipment travel pickup, and with outputs wired to crane parameter recorder (3) with real-time counter, display unit (4), preventive signaling unit (5), actuator (6) and external memory (2) communicating, via a two-way data exchange channel, with the digital computing unit. The system comprises, at least, one indicator (8) of the crane equipment crossing of, at least, one check point within the crane operating range, the said indicator being connected to the digital computing unit additional data input adapted to correct the crane equipment travel pickup readings in compliance with the signals generated by the aforesaid indicator.

EFFECT: higher reliability of the crane coordinate protection system operation.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used in control protection systems of electrically-driven load lifting machinery. The system incorporates a digital computing unit (1) with its data inputs connected, a multiplexer data exchange channel, with the crane parameter recording peripherals, while its outputs are connected with crane parameter recorder (3) with a real-time counter, display unit (4), nonurgent alarm unit (5), actuator unit (6) and external memory unit (2) connected to the digital computing unit by a duplex data exchange channel. The system comprises the crane supply voltage parameter meters (81...8n) with their outputs connected, via the multiplex data exchange channel, to additional crane parameter recorder data inputs, those of the computing unit and the display. The digital computing unit is designed to compare the measured voltage with tolerable supply voltage parameters, to generate crane motions inhibiting signals in the case of the supply voltage parameters falling beyond tolerances for crane control system, to generate signals inhibiting certain types of the cranes motions in the case of the crane drives supply voltage falling beyond tolerances and to generate sound and light nonurgent alarm signals under the aforesaid conditions.

EFFECT: higher reliability of the crane operation.

2 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: activator with a permanent magnet is fitted on the shaft for the magnet to rotate with the controlled equipment changing its position. Two hermetic contacts are arranged to be operated by the permanent magnet field effect in compliance with the shaft rotation direction. The count direction determination unit defines, proceeding from the hermetic contacts operation sequence, the shaft direction of rotation, i.e. direction of the equipment position change, and the reversing counter content increase or decrease pulses are generated to be sent to the aforesaid counter. The counter content current values defines the hoisting machine grid point to be sent to the output characteristic shaper. The latter, to comply with the values and parameters set by output characteristic controller 8, generates the pickup output signals, discrete, analog or digital. The supervisor controls the availability of the pickup outside power supply. With the pickup operated from the outside source, the supervisor switches over the switcher so that the hermetic contacts, count direction determination unit reversing counter are fed from the power supply circuit. In case the machine supply circuit voltage downs below the tolerance, the supervisor switches over the switcher so that the aforesaid units are supplied from the independent power source (storage battery) to allow controlling the equipment position change without outside power supply. In case the machine power supply is OK, the supervisor instructs the charger to charge the independent power source.

EFFECT: higher reliability of the position pickup and its expanded potentialities.

5 cl, 1 dwg

FIELD: mechanical engineering; material handling machinery.

SUBSTANCE: proposed method includes measuring or crane loads, traveling of crane with load and time of operation of crane mechanisms, recording of data and comparing them with normal characteristics of crane. In process o measurement, crane operating cycle is found. Beginning of cycle is determined by switching on any other mechanism after switching on load lifting mechanism at G>Gnl and L>Lnl where G is actual load from load on crane hook, Gnl is load at no load on crane hook, ZL is displacement of center of gravity of hook casing relative to center of gravity of load, Lnl is maximum tolerable displacement of center of gravity of hook casing relative to center of gravity of load. End of cycle is found by beginning of following cycle after execution of load lifting in case of no load on crane hook at G>Gnl and operation of any mechanism of horizontal displacement of load at L>Lnl. Simultaneously with determination of beginning and end of cycle, load G is measured at beginning of load lifting in period from moment of exceeding of load Gnl to moment of switching on any other load horizontal displacement mechanism. Current mean value of load is calculated within time interval Δt. Maximum value of current mean load is determined also within said period. Basing on maximum value of current mean load, mass of load is determined, and crane cycle with obtained mass of load is recorded. Then cycles with corresponding load masses are summed up. According to obtained data crane is classified to group of class, data obtained in each group of class are compared with normal characteristics of crane according to specifications and , basing of results on comparing, crane is placed in operation, or crane operator is warned or operation of crane is prohibited. Proposed device contains sensors of load and horizontal displacements, processing unit and comparing unit. Device includes also crane operation cycle revealing unit, cycle recording unit, load mass metering unit, AND and OR units and crane state evaluation unit.

EFFECT: provision of reliable data on conditions of crane, improved safety.

3 cl, 1 dwg

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