Method to protect boom crane with maneuvering boom

FIELD: mechanical engineering; lifting and transportation machine building.

SUBSTANCE: invention can be used in control and protection system of load-lifting cranes. Proposed system contains load pickups 1, boom tilting angle pickups 5, parameters indicator 6 and series-connected tolerable load setting unit 8, comparator 9 and actuating unit 10 whose output is connected to first input of parameters recorder 11, unit to record designed values of parameters 12, correction unit 3, load weight check unit 2, scaling unit 4, variable coefficients unit 14, change-over switch 15, boom deflection recording unit 13 and boom reach calculating unit 7.

EFFECT: improved safety of crane owing to increased accuracy of control of its parameters.

2 cl, 2 dwg

 

The invention relates to hoisting and transport machinery and can be used in security systems, cranes boom type with a steerable boom overload and collision with obstacles and to control the usage of the crane.

There are ways to protect crane boom type with a steerable boom, including preliminary, for example, by calculation in the design of the crane, the determination of loads that are valid for different spatial positions of its arrows, their learning, identifying in the process of faucet direct or indirect method of operating parameters that characterize the current load and the current spatial position of the boom (the efforts ropes on cranes with flexible suspension arrows, or pressure in the lift cylinder boom cranes with rigid suspension boom length and boom angle, the angle of rotation of the platform and others), comparing the current load with the stored valid load for the current spatial position of the boom and the subsequent formation of a warning information signal and/or control signal, in particular a switch-off signal, at least one mechanism of the crane, if the current load exceeds the allowable, or when the limit positions of the tip of the boom.

This method is PE is litvan, for example, the protection device of a crane, is protected by certificate of the Russian Federation for useful model No. 11191, VS 23/90, 16.09.1999. The known device comprises a load sensor, angle and length of the boom, the indicator parameters and consistently connected unit assignments permissible load, the comparator, the Executive unit, the output of which is connected to the first input of the recorder settings. These method and apparatus are most similar to the claimed invention.

A disadvantage of the known technical solutions is the low accuracy of the control parameters of the crane, primarily due to significant deviations of these parameters from their estimated values, and the difficulties of accounting for some of them (primarily deformation of the structure under various loads) in the design and configuration of the crane protective characteristics of the device.

The task, which directed the claimed invention, is to develop a way to protect the crane boom type with a steerable shaft and device for its implementation, which would provide increased safety in the operation of loading crane at the expense of increasing the accuracy of control of its parameters.

The goal of the project is achieved by the well known method of protecting the load-lifting crane boom type maneuver the howling arrow including preliminary, for example, by calculation in the design of the crane, the determination of loads that are valid for different spatial positions of its arrows, their learning, identifying in the process of faucet direct or indirect method of operating parameters that characterize the current load and the current spatial position of the boom, the comparison of the current load with the stored allowable load for the current spatial position of the boom and the subsequent formation of a warning information signal and/or control signal, in particular a switch-off signal, at least one mechanism of the crane, if the current load exceeds the allowable, or when the limit positions of the tip of the boom, according to the invention before the crane is measured under a known load, and then with no load, direct or indirect method operating parameters characterizing the load and the current spatial position of the boom, memorize them, to measure external calibrated instruments specified parameters, memorize them and in the process of the crane used in the determination of the actual and allowable load and the actual position of the tip of the boom.

With respect to the system implementing the claimed method of protection of the crane, the technical is does is achieved by in a known system of protection of the crane boom type with shunting arrow containing the load sensor boom angle indicator parameters and consistently connected unit assignments permissible load, the comparator and the Executive unit, the output of which is connected to the first input of the Registrar of parameters, according to the invention introduced the unit records the estimated parameter values, the error correction block, the block definition load mass unit scale, the variable block of coefficients, the switch, the unit records the deflection of the boom and the computing unit departure, while the output of the load sensor is connected to the first inputs of the block definition load mass error correction block and the block scale, the output of the sensor boom angle is connected to the second input of the error correction block, the first input of the indicator parameters and the first input of the computing unit departure, the output of which is connected to the input of block job permissible load, the output unit records the estimated values of the parameters connected with the third input of the error correction block, the first output of which is connected to the second input of the block definition load mass and the second output - through unit records the deflection of the boom to the second input of the computing unit departure, the input unit variable coefficients connected to the switch, and the output to the second input of the scaler,the output of which is connected with the second input record block deflection of the boom, the output of the block definition of the load connected to the second input of the comparator, the second input of the Registrar of parameters and the second input of indicator parameters, a third input connected to the output unit job allowable load, and the fourth input - output computing unit departure, the output of the sensor boom angle is also connected to the third input of the Registrar of parameters, a fourth input connected to the output of the load cell, the fifth input with the output of the comparator, the sixth input - output unit job allowable load, and the seventh output - output computing unit departure.

The security system can be equipped with a sensor length of the boom and functional Converter, while the output of the sensor the length of the boom is connected to the fourth input of the error correction block and to the first input of the functional inverter, the second input is connected to the third output of the correction block, and the output to the third input of the scaler, the third input of the computing unit departure, to the fifth input of the indicator parameters and for the eighth sign of the Registrar of parameters.

The invention consists in that the sensor length and boom angle (and, if necessary, depending on the type of crane, additional sensors for other parameters, such as sensor azimuth for jib cranes or height gauge is the rise of the hook for tower cranes, etc.) recording and follow up of the coordinates of obstacles, consequently their impact on the control accuracy of the coordinates is not relevant. Significant is the impact of deviations and changes under load parameters of the equipment of the crane that takes place in the vertical plane of the boom (and towers). In the context of this application proposed technical implementation of the alignment system on the crane in the channels of load control and change parameters of the equipment in the vertical plane of the boom, i.e. the channels of load sensors, the length and boom angle. To do this, before the crane is measured under a known load, and then with no load, direct or indirect method operating parameters characterizing the load and the current spatial position of the boom, memorize them, to measure external calibrated instruments specified parameters, memorize them, and in the process of the crane used in the determination of the actual and allowable load and the actual position of the tip of the boom.

The technical result of the invention is to improve the safety of crane due to the increased accuracy of control of its parameters.

Figure 1 and 2 shows the functional diagram of the proposed system protection cranes boom type with fixed length boom and telescopic boom, respectively.

The system is and protect the crane includes a sensor 1 load unit 2 determine the mass of the cargo, the correction unit 3, unit 4 zoom, sensor 5 boom angle relative to the gravitational vertical, indicator 6 parameters, block 7 calculation of departure, block 8 job permissible load, the comparator 9, the actuating unit 10, the Registrar 11 parameters, unit 12 records the estimated parameter values, unit 13 records the deflection of the boom, block 14 variables coefficients and the switch 15.

The output of the sensor 1 load connected to the first input unit 2 determine the mass of the cargo, the correction unit 3 and unit 4 zoom.

The output of the sensor 5 of the boom angle is connected to the second input of the correction unit 3, the first input indicator 6 parameters and through serially connected unit 7 calculation of departure, block 8 job permissible load, the comparator 9 and the actuating unit 10 to the first input of the Registrar on 11 parameters of the crane.

The output unit 12 records the estimated values of the parameters connected with the third input of the correction unit 3, the first output of which is connected to the second input of the unit 2 determine the mass of the load and the second output - through unit 13 records the deflection of the boom to the second input unit 7 calculation of departure.

The input unit 14 variables coefficients connected to the switch 15 and the output to the second input unit 4 scaling, the output of which is connected with the second input unit 13 records ol the bending of the boom.

The output of block 2 determine the mass of the load is connected to the second input of the comparator 9, the second input of the Registrar on 11 parameters and the second input indicator 6 parameters, a third input connected to the output unit 8 job allowable load, and the fourth input - output unit 7 calculation of departure.

The output of the sensor 5 of the boom angle is also connected to the third input of the Registrar on 11 parameters, a fourth input connected to the output of the sensor 1 load, the fifth input with the output of the comparator 9, the sixth input - output unit 8 job allowable load, and the seventh output from the output unit 7 calculation of departure.

To the output of the control unit are connected actuators.

On tap with flexible (on the ropes) suspension boom of fixed length sensor 1 load is installed in the gear streaptese rope, that reduce the effort on the specified sensor, and is a force sensor. The boom is located the sensor 5 of the boom angle.

Unit 2 determine the mass of the cargo is intended for conversion of the signal, controlled by the sensor 1 load, a signal proportional to the weight of the cargo.

The correction unit 3 consists of electromagneticwave storage device, in which when setting up the crane are recorded as estimated (or measured external metering is tion devices high precision) values of monitored parameters, and the respective indicators are determined by the signals of the sensors 1 and 5; on the basis of these data, we calculate the correction to the readings of the sensors, measured in operating system mode.

Unit 4 scaling is designed to adjust the values of the deflection of the boom depending on its length, in particular for valves with fixed boom sections and tower cranes - signal block 14 variables coefficients determined by the switch 15, depending on the crane type.

Unit 7 calculation of departure is designed to convert the sensor signal 5 angle relative to the vertical in the value of the sine of this angle, i.e. in an amount proportional to the departure, and the block 8 job allowable load is designed to convert the signal of departure in the signal allowable load. Blocks 7 and 8 may be made in the form of permanent storage devices (ROM), address inputs are inputs respectively of blocks 7 and 8, and the outputs of these blocks is a data bus ROM with the recorded values, respectively departures and allowable loads (for certain flights).

The system has the indicator 6 and 11 Registrar settings of a crane to analyze his work. The recorded parameters can be ongoing to assess, for example, emergency situations and long-term statistics to estimate p the resource indices of the crane, including the need for it maintenance. Registrar 11 parameters consists of a processor and electromagneticwave storage device, the inputs of which are connected respectively to the outputs of the sensors 1 and 5, and the functional units of the system for the registration performance of the crane and the system itself. If the system itself is performed by means of digital technology, the Registrar may not contain a processor.

Unit 12 records the estimated parameter values includes a keyboard for manual input unit 3 correction of calculated values of effort, lengths and angles, the corresponding measured by sensors 1 and 5.

Unit 13 records the deflection of the boom is designed to record the difference of the values of flights at no load and at a known (calibrated) the mass of the goods produced by the alignment device on the crane.

Unit 14 variables coefficients can be used to record sensitive data design features and the number of boom sections or tower crane.

The switch 15 is preferably performed by means of digital technology and is an electronic switch.

The system of protection of hoisting crane with telescopic boom, presented in figure 2, includes a sensor 101, the load block 102 to determine the mass of cargo unit 103 correction unit 104 scaling, sensor 05 boom angle relative to the gravitational vertical, the indicator 106 parameters, block 107 calculation of departure, block 108 job permissible load, the comparator 109, the Executive unit 110, the Registrar 111 parameters, unit 112 records the estimated parameter values, unit 113 records the deflection of the boom, block 114 variable coefficients, the switch 115, the sensor length of the arrows 116 and functional Converter 117.

The output of the sensor 101 of the load connected to the first inputs of the block 102 to determine the mass of cargo unit 103 and correction unit 104 scaling.

The output of the sensor 105 boom angle is connected to the second input unit 103 correction, the first input of the indicator 106 settings and through serially connected unit 107 calculation of departure, block 108 job permissible load, the comparator 109 and the Executive unit 110 to the first input of the Registrar 111 parameters of the crane.

The output unit 112 records the estimated values of the parameters connected with the third input unit 103 correction, the first output of which is connected to the second input of the block 102 to determine the mass of the load and the second output - through unit 113 records the deflection of the boom to the second input unit 107 calculation of departure.

The input unit 114 of variable factors connected to the switch 115 and the output to the second input unit 104 scaling, the output of which is connected with the second input unit 113 records the deflection of the boom.

The output of block 102 to determine the mass of the load is connected to the second input of the comparator 109, the second input of the Registrar 111 parameters and the second input of the indicator 106 parameters, a third input connected to the output unit 108 job allowable load, and the fourth input - output unit 107 calculation of departure.

The output of the sensor 105 boom angle is also connected to the third input of the Registrar 111 parameters, a fourth input connected to the output of the sensor 101 of the load, the fifth input with the output of the comparator 109, the sixth input - output unit 108 job allowable load, and the seventh output from the output unit 107 calculation of departure.

The output of the sensor 116, the length of the boom is connected to the fourth input unit 103 correction and to the first input of the functional Converter 117, the second input is connected to the third output unit 103 correction, and output to the third input unit 10 scale, the third input unit 107 calculation of departure, to the fifth input of the indicator 106 parameters and for the eighth sign of the Registrar 111 parameters.

To the output of the control unit 110 are connected actuators.

For telescopic boom crane and hydraulic equipment sensor 101 load control effort in the lift cylinder boom and is a combination of two pressure sensors piston and rod cavities, the signals which are processed by the appropriate formula. On stelarastelara sensor 116 the length of the boom and the sensor 105 boom angle.

Block 102 to determine the mass of the cargo is intended for conversion of the signal, controlled by the sensor 101 of the load, a signal proportional to the weight of the cargo.

Block 103 correction consists of electromagneticwave storage device, in which when setting up the crane are recorded as estimated (or measured external measuring devices high precision) values of monitored parameters and the corresponding parameters determined by the sensor signals 101, 105, 116. Based on these data, we calculate the correction to the readings of the sensors, measured in operating system mode.

Functional Converter 117 is designed to convert the sensor signal 116 the length of the boom in the quantity proportional to the length of the boom, and performed on the means of digital technology, but can be performed on blocks of nonlinearities or specialized mechanical element.

Block 104 scaling is designed to adjust the values of the deflection of the boom depending on its length in a functional signal Converter 117 and advanced signal block 114 of variable rates determined by the switch 115 depending on the type of crane, for example, when the extendable section of the jib extension or Guskov. In the absence of such elements, the switch 115 is set at the position at which oterom block variable factors does not influence the calculation.

Block 107 calculation of departure is designed to convert the sensor signal 105 boom angle relative to the gravitational vertical in the value of the sine of this angle, i.e. in an amount proportional to the departure, and the block 108 job allowable load is designed to convert the signal of departure in the signal allowable load. Block 107 calculation of departure, as well as block 108 job allowable load can be made in the form of permanent storage devices (ROM), address inputs are inputs respectively of blocks 107 and 108, and outputs of these blocks is a data bus ROM with the recorded values, respectively departures and allowable loads (for certain flights).

The system has the indicator 106 and the Registrar 111 parameters of the crane to analyze his work. The recorded parameters can be ongoing to assess, for example, emergency situations and long-term statistics to assess the resource indices of the crane, including the need for it maintenance. The Registrar 111 parameters consists of a processor and electromagneticwave storage device, the inputs of which are connected respectively to the outputs of all sensors and functional units of the system for the registration performance of the crane and the system itself. If the system runs with what edstam digital technology, the Registrar may not contain a processor.

Unit 112 records the estimated parameter values includes a keyboard for manual input in block 103 the correction of the calculated values of effort, lengths and angles, the corresponding measured by the sensors 101, 116, 105.

Unit 113 records the deflection of the boom is designed to record the difference of the values of flights at no load and at a known (calibrated) the mass of the goods produced by the alignment device on the crane.

The switch 115 is preferably performed by means of digital technology and is an electronic switch.

Functional Converter 117 is made by means of digital technology, but can be performed on blocks of nonlinearities or specialized mechanical element.

The method is as follows.

During the initial installation of the system make it the setting (adjustment) on the crane to minimize errors as the system itself (primarily the sensors and nodes of their installation), and errors caused by the deviation of the crane from the calculated values.

For this purpose, the crane boom is installed in multiple positions, the angles which are measured by the sensor 5 (105) for different values of the lengths of the arrows, as measured by the sensor 116, if the device is used on a crane with a telescopic boom. If the crane has to deducing the second section of the jib additional structural elements fixed length (extension or jib), or performed with fixed boom sections when the sensor length of the arrows is missing, before beginning the alignment should switch 15 (115) set in block 14 (114) variables coefficients an amount that depends on the design features of the crane, for example, the number of boom sections or tower crane.

After this you need to hang on a hook gauge cargo, set the arrow on the departure of the calibrated point and enter this value in block 3 (103). In "memory" device information is written to the sensor 1 (101) and the load effect of the calibration load.

At the same time at this point, the sensor 5 (105) boom angle automatically measuring and recording unit 3 (103) correction angle, which is calculated departure (subject of boom deflection from exposure to the crane loaded arrows).

After entering the data, you should lower the load to the ground, avoiding manipulation of the boom to measure roulette real departure in an unloaded boom (without load on the hook), and block 12 (112) specifying the estimated parameter values to gain the measured number.

Block 3 (103) correction of records in memory the value of the measured departure. At the same time at this point adjustment sensor 1 (101) load automatically measuring and recording unit 3 (103) correction value of the load about the impact on the sensor unloaded boom with a hook.

This is followed by similar operations for installing the boom of the crane to the next angular position measurement and introduction to the memory block 3 (103) correction of the numerical values of sorties without load and under the influence of the cargo of the calibration mass.

Thus, in block 3 (103) correction of the recorded data to calculate amendments and correction of the reading system. All amendments are stored in the correction block during the entire time of operation of the crane (or until re-alignment).

In block 13 (113) recording of boom deflection is recorded the difference between the values of departures, i.e. the deflection of the boom under the influence of the cargo of the calibration mass.

Further during operation of the crane and in the calculation of the departure of the magnitude of the deflection of the boom (or tower), transmitted by a block 13 (113) in block 7 (107) calculation of departure, scaled unit 4 (104) according to the signals of the sensor 1 (101) and the load sensor 116 the length of the boom.

The signals of all sensors during the working cycle pass block 3 (103) correction block 13 (113) recording the deflection of the boom, in which these sensor signals are added amended.

The allowable load value is determined by the boom and constantly in the automatic mode is controlled by the sensors 116 and 5 (105) and the functional Converter 117 and block 7 (107) calculation of departure, creating the input unit 8 (108) allowable load signal is l, depending on the position of the boom, and causing the output of block the appearance of the signal allowable load.

During operation of the crane, actuators which are connected to the Executive unit 10 (110), in the case of excess of the sensor signal 1 (101) actual load and accordingly the block definition load mass 2 (102) valid values defined by the signal block 8 (108), is the triggering of the comparator 9 (109) and disable the appropriate actuators.

At the same time sensors 1 (101), 116, 5 (105) and functional units of the device creates a signal on indicator 6 (106), creating informational redundancy protection device, and the Registrar 11 (111) parameters. Record the current settings of the crane is made within a certain period of time, the data is saved during this period, and then updated; these data are used for analysis in the event of an accident.

The system for implementing the method of the protection of the crane can be manufactured with the use of modern components and technology. Specialist in the art should be obvious that the present invention there are a variety of modifications and changes. Accordingly, it is assumed that the present invention covers these modificat and and changes and cash equivalents without departure from the essence and scope of the invention disclosed in the accompanying claims.

1. Protection system crane boom type with shunting arrow containing the load sensor boom angle indicator parameters and consistently connected unit assignments permissible load, the comparator and the Executive unit, the output of which is connected to the first input of the Registrar of parameters, characterized in that it introduced the unit records the estimated parameter values, the error correction block, the block definition load mass unit scale, the variable block of coefficients, the switch, the unit records the deflection of the boom and the computing unit departure, while the output of the load sensor is connected to the first inputs of the block definition load mass error correction block and the block scale the output of sensor boom angle is connected to the second input of the error correction block, the first input of the indicator parameters and the first input of the computing unit departure, the output of which is connected to the input of block job permissible load, the output unit records the estimated values of the parameters connected with the third input of the error correction block, the first output of which is connected to the second input of the block definition load mass and the second output through the recording unit deflection of the boom to the second input of the computing unit howled the same the input unit variable coefficients connected to the switch, and the output to the second input of the scaler, the output of which is connected with the second input of the recording unit of boom deflection, the output of block determine the mass of the load is connected to the second input of the comparator, the second input of the Registrar of parameters and the second input of indicator parameters, a third input connected to the output unit job allowable load, and the fourth input - output computing unit departure, the output of the sensor boom angle is also connected to the third input of the Registrar of parameters, a fourth input connected to the output of the load cell, the fifth input with the output of the comparator, the sixth the input - output unit job allowable load, and the seventh output - output computing unit departure.

2. The system according to claim 1, characterized in that it is equipped with a sensor length of the boom and functional Converter, while the output of the sensor the length of the boom is connected to the fourth input of the error correction block and to the first input of the functional inverter, the second input is connected to the third output of the correction block, and the output to the third input of the scaler, the third input of the computing unit departure, to the fifth input of the indicator parameters and for the eighth sign of the Registrar of parameters.



 

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20 cl, 1 dwg

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

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

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: hoisting and transportation machinery, particularly to control and protect hoisting machines against overload.

SUBSTANCE: system comprises the first control means group installed on support structure or on equipment parts not to be separated from structure. The first control means group includes digital data processing unit 2 having output connected to executive and signaling device 4, 5 units, the first data input-output unit 3 linked to digital data processing unit with two-directional data exchange channel, crane 6 parameter sensors and power supply unit 1. Power supply unit 1 has one clamp connected to load-lifting machine body and another clamp secured to power supply system bus. The second control means group is supported by movable structure or equipment to be demounted and includes crane parameter sensors 10. The first and the second control means groups are linked one to another through two-directional radioline. The first control means group is provided with the first receiving/transmitting radio station, independent power source 15 and switchboard 16.

EFFECT: increased safety system reliability, simplified assemblage and installation thereof on load-lifting machine.

1 dwg

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

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

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