Method of and device to protect load-lifting machine with telescopic boom

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

 

The invention relates to hoisting and transport machinery, namely, devices for operating hoisting machine, but with the greatest effect can be used for overload protection, collisions with obstacles, dangerous voltage power lines and invalid mutual displacements equipment telescopic boom crane, as well as on other machines (for example, articulated shafts)that require remote power transmission, control and information signals while limiting the dedicated lines.

Known protection device on the boom of a crane that contains the load sensors, the angle of inclination and the length of the boom, the angle of rotation of the platform and the height of the lifting hook and the control unit, thereby protecting the valve against overloading and collisions with obstacles (including power lines) [Construction and road machines No. 4, 1994, p.14-17].

The disadvantage of this device that implements the protection of the crane on the status of crane equipment (coordinates), is the lack of control over obstacles during the process cycle write valid coordinates, i.e. relative position of the crane and obstacles (including power transmission lines (PTL)), which requires manipulation of crane equipment and signaling the position of the equipment with moveable what piece of the crane (Telescopium section boom).

Known protection device of a crane with a telescopic boom, which by means of remote-control transmission through the drum and steel cable provides the connection between the group of instruments and devices installed on the rotary platform of the crane, and a group of instruments and devices that are installed on raised sections of the arrows; on the same line communication is the transfer of power to the volatile circuit devices and tools and remote-control unit transmission [application 95111291/11 (019395) from 30.05.95 with the decision on the grant of a patent for invention from 12.03.97].

The disadvantage of this device is the lack of separation of circuits when the supply voltage for the devices installed on the raised sections of the boom. As a result, for example, in the transport state of the valve when lights should be illuminated, the power supply voltage is supplied also to other devices, the functioning of which should occur only during operation of the crane.

The aim of the invention is to enhance the functionality of the protection method of lifting machine, providing convenience and reliability of the transmission of commands for selective connection of technical means, located on the raised part, and receiving information from sensors located there.

The goal is achieved t is m, for the sake of convenience and reliability of commands on the selective connection of technical means, located on the raised part, and receiving information from sensors located there way to protect hoisting machine with telescopic boom overload, collisions with obstacles, dangerous voltage power lines and invalid mutual displacements equipment, namely, that the basic data processing unit located in the cab lifting machine and containing the first computer, the first storage device and the indicator parameters by serial polling signals from the first set of sensors located on the stationary part of the hoisting machine, and by passing through the drum with current-carrying ring and located on the raised part of the hoisting machine (for example, the main boom tip) controller technical means proposed part containing the second computer and the second storage device commands to the connected hardware and reception information of the second set of sensors located on the raised part is disconnecting the drives of the lifting mechanisms of the machine, when actual performance exceeds the allowable value, provided

the connection of current-carrying ring of the drum through the loc is defined in the driver's cab body enable marker light one terminal of the source voltage, the second terminal of which is connected with the steel hoisting machine,

installation in addition to these basic data processing unit and the controller of technical means proposed part respectively of the first and second transceivers serial communication, the input/outputs are connected to the first and second computers, respectively, of the base unit, the data processing and controller of technical means of the retractable part, and the second galvanically isolated inputs/outputs connected to the conductive ring,

the connection to the first computer an extra controller (or create a subroutine of the basic data processing unit) bodies enable devices on the raised part (for example, the tip arrows)attached to the bodies enable devices on the raised part and the output of the additional control unit supply voltage, the input of which is connected to the first output in the cab lifting machine body on the device performed in accordance with the proposed method, which is also connected to the power bus of all blocks and the first set of sensors devices

connecting the second body to enable the device to the conductive ring, and the entrance of the body enable the device to a voltage source feed is,

connect the output of the second transceiver serial data transmission to the input of the control unit connection, the output of which is connected to the first input of the unit delay time, the second input is connected to the conductive ring, and the output connected to the input connection of the supply voltage, the output of which is connected to the same power bus controller technical means of the retractable part and the second set of sensors monitoring parameters, while the second power bus is connected to the metal structure of the hoisting machine, and

the output connection unit supply voltage connected to the inverter input, the output of which is connected to the first input of the logical circuit And the second input of which is connected to the conductive ring, and the output is connected to the first input of the logic circuit OR the second input of which is connected to the output of the second calculator, which also connects the input of the first amplifier, the output of which is connected to the headlight, and the output of the logic circuit OR is connected to the input of the second amplifier, the output of which is connected to the vehicle's lantern.

Another objective is to provide reliable remote transmission of commands for selective connection unit system, located on the raised part of the hoisting machine, and receive information from them is of Ignatov.

The aim is achieved in that the protection device lifting machine with telescopic boom overload, collisions with obstacles, dangerous voltage power lines and invalid mutual displacements containing equipment located on the stationary part of the hoisting machine

drum with conducting ring to which the body enable marker light located in the cab, connected to a source supply voltage,

the first set of sensors, control equipment parameters hoisting machine that is connected to the base data processing unit that includes the first computer, the first storage device and the indicator settings located in the cab lifting machine and through the body of the switch the device is connected to one terminal of the source voltage, the second terminal of which is connected with the steel hoisting machine,

located on the raised part (for example, the main boom tip) clearance lamp, spotlight and the second set of sensors monitoring parameters that are connected to the controller of technical means proposed part containing the second computer and the second storage device,

in addition to these basic data processing unit includes a first transceiver for serial data transmission, the first in the od/output of which is connected to the first computer, and second galvanically isolated input/output connected to the conductive ring, and connected to the first transmitter controller (or a subroutine of the basic data processing unit) bodies enable devices on the raised part that is connected to the bodies enable devices on the nominated side of the boom and the output control unit supply voltage, the input of which is connected to the first output of the body on the device that is connected also to the power bus of all blocks and the first set of sensors of the device, while

the second output of the body on the device connected to the conductive ring, and the entrance of the body on the device connected to the power supply voltage,

controller technical funds raised portion further comprises a second transceiver, the serial communication, the first input/output which is connected to the second transmitter, the second galvanically isolated input/output connected to the conductive ring, and the output connected to the input of control unit connection, the output of which is connected to the first input of the unit delay time, the second input is connected to the conductive ring, and the output connected to the first input unit connecting the supply voltage, the output of which is connected to the same power bus controller technical means proposed is part and second set of sensors monitoring parameters while the second power bus is connected with the steel hoisting machine;

the output connection unit supply voltage connected to the inverter input, the output of which is connected to the first input of the logical circuit And the second input of which is connected to the conductive ring, and the output connected to the first input of the logic circuit OR the second input of which is connected to the output of the second calculator, which is also connected to the input of the first amplifier, the output of which is connected to the headlight, and the output of the logic circuit OR is connected to the input of the second amplifier, the output of which is connected to the vehicle's lantern.

The next target is the device implementing the galvanically isolated I/o transceivers serial communication.

The goal is achieved that the second device is galvanically isolated inputs/outputs of the first and second transceivers serial communication can be performed through a transformer or capacitive coupling or by means of optical radiation.

An additional goal is to exercise to further improve the reliability of data transmission in accordance with the CAN Protocol.

The aim is achieved in that a method is provided for closing the electric circuit of energy transfer (power) and signalone raised portion (for example, the top arrows) do not use metal (weight) lifting machines, and an additional wire connected to the additional conductive rings of the drum.

The objective is also achieved by the fact that in the device the drum is provided with an additional conductive ring and the second terminal of the power supply and the second power bus technical means of main boom tip is isolated from the metal hoisting machine and connected to an additional (second) conductive ring of the drum.

Another secondary goal is to use to simplify circuit design device auxiliary current conducting rings.

The goal is achieved that the device is a drum provided with an additional conductive ring that is connected to the second inputs/outputs of the first and second transceivers serial communication.

The objective is also achieved by the fact that in the variant of the device, the drum is provided with an additional conductive ring that is connected to the second inputs/outputs of the first and second transceivers serial transmission of information and the second additional conductive ring and the second terminal of the power supply and the second power bus technical means of main boom tip is isolated from the metal lifting Masha is s and is connected to the second additional current-carrying ring of the drum.

Figure 1 shows the functional diagram of the device.

Figure 2 shows a variant of the logic circuit to control the turning marker light.

The proposed method is designed to allow remote activation and deactivation of each technical means, located on the raised part (for example, top arrow), independently from each other and in any combination:

- while driving on the roads should be included marker light (from the cab) when the device is turned off protection;

- during operation of the crane when required security must be enabled headlight and safety devices, and under certain conditions and marker light; for this must be provided by sending commands to the retractable part and receiving information therefrom technical means of protection devices to be included from the cab lifting machine.

The inclusion of each technical tools from the cab lifting machine must be performed by the security device on the line serial communication (multiplex lines).

For the functioning of the security must be provided for communication between the digital data processing unit and sensors.

The device (1) contains located in the cab lifting machine base unit of the processing data 1 and the first set of sensors 2 (load, length and boom angle, the angle of rotation of the platform)installed on stationary equipment hoisting machines. Basic digital data processing unit 1 comprises the first transmitter 3, the first storage device with the programme of work 4 and the display 5, and in accordance with the proposed unit 1 supplemented by the first transceiver, the serial communication 6, the first input/output which is connected to the first transmitter 3, and the second galvanically isolated input/output connected to a current-carrying ring 7, and is connected to the first transmitter controller (or a subroutine of the basic data processing unit) bodies enable devices on the raised part 8 connected to the bodies enable devices on the nominated side of the arrows 9 and the output control unit supply voltage 10.

Sensors 2 and the digital data processing unit 1 operate the security system, protecting the valve against overloading and invalid moves his equipment.

On the raised part (for example, the main boom tip) is clearance lamp 11, the lamp 12 and the second set of sensors monitoring parameters 13, which is connected to the controller of technical means of the retractable portion 14, which contains the second calculator 15 and the second storage device 16.

<> In accordance with the proposed device controller technical means of the retractable portion 14 includes a second transceiver for serial transmission information 17, the first input/output which is connected to the second calculator 15, a second galvanically isolated input/output connected to a current-carrying ring 7, and the output connected to the input of control unit connection 18, the output of which is connected to the first input of the unit delay time 19, the second input is connected to the conductive ring 7, and the output connected to the input of the unit connect the power supply 20.

The controller of technical means of the retractable portion 14 further comprises a logic circuit to control the turning marker light 11 power other devices retractable part. The logic circuit includes an inverter 21, the output of which is connected to the first input logic "And" 22, the second input of which is connected to a current-carrying ring 7, and the output connected to the first input of the logical circuit OR 23, the second input of which is connected to the output of the second calculator 15.

The output of the second transmitter 15 is connected to the input of the first amplifier 24, the output of which is connected to the lamp 12, and the output of the logic circuit OR 23 is connected to the input of the second amplifier 25, the output of which is connected to a vehicle lamp 11.

The device dopolneniya enable device 26 in two directions: the first output 27 is connected to the power bus unit 1 and the first set of sensors 2 devices, the second output 28 is connected to a current-carrying ring 7, and the entrance to the supply source 29.

Figure 1 shows also located in the cab toggle switch 30 to activate the marker light in the transport state of the hoisting machine and the signal lamp 31 of this inclusion.

Solvers 3 and 15, and is included in computing the multiplexer, ADC, RAM, storage device 4, and 16 and not shown in figure 1 the interface device are standard chipset that provides the basic data processing unit 1 and the controller 14. Indicator 5, usually digital, can be performed on the basis of led, fluorescent or liquid crystal elements.

Complexes of sensors 2 and 13 include both sensors proper protection devices (pressure, length and boom angle, rotation, and tilt of the platform, and others), and staff sensors lifting machines (for example, the oil pressure sensor in the engine part of the complex 2, or switch hook lifting part of the complex 13).

Conductive ring 7 with a current collector mounted on the spring loaded reel on it with the rope, one end of which is connected with the raised part (head arrows).

The controller organs enable devices on the raised part 8 as the device input/output DL of the transmitter 3 is controlled by the routine, recorded in the storage device 4, and serves to control bodies enable devices on the nominated side of the arrow 9, which can be toggle switches, buttons, switches of various types.

Control unit supply voltage 10 is an electrical device (circuit)that change their state when connecting voltage.

Clearance lamp 11 and the lamp 12 are permanent lifting devices of the machine.

The first 6 and second 17 transceivers are standard serial communication, or may be included in computing (3 and 15. In all cases one of their inputs/outputs must be supplemented circuit galvanic isolation (transformer, capacitive, optical) for connecting the information channel for the transmission of commands and data to the power lines (the live ring).

Control unit connection 18 is a logic diagram that change their state depending on the presence or absence of coded command signals from the base data processing unit 1.

The unit time delay 19 is a device (an electric circuit or electric element), increasing the duration of the signal control unit connection 18 to the preset value.

The connection unit power supply 20 is a e is stricescu diagram of the power source, plug-in signal of the base data processing unit 1.

Option scheme logic to control switching on / marker light when power other devices retractable part is presented in figure 2. For clarity, the diagram presented in relay performance, although it may be performed on the transistors, chips or to be an integral part of the transmitter 15.

The circuit includes a capacitor 32, performs the function of the block time delay 19 in figure 1, to which are connected in series relay 33, a normally open contact which is connected in the supply circuit of the controller of technical means of the retractable portion 14, and a normally closed contact connected in the supply circuit marker light 11.

To the unit connect the power supply 20 is connected relays 34, normally open contact which is connected in the supply circuit of the controller of technical means of the retractable portion 14 parallel to the closing of the relay contact 33 and the normally closed contact is connected in the supply circuit marker light 11 in series with the relay contact 33.

The amplifier 25 is connected in the supply circuit marker light 11 contacts 33 and 34.

The device operates as follows.

When lifting the machine is in the transport state and requires the inclusion of the marker light, the driver switches the switch 30 and applies a voltage che is ez conductive ring 7 on the raised part (head arrows), which is signaled by the lamp 31. The voltage at the time determined by the unit time delay 19, the connection unit power supply 20 (Fig 1) is fed to the controller of technical means of the retractable portion 14. During this time check the availability of the code the command and information signals. If beep codes are not available, the unit 20 removes the voltage from the controller 14.

In the same way as in the transport state, the protection device body 26 is not connected and the signals from the base data processing unit 1 to the controller of technical means of the retractable portion 14 is not received, then the output of the unit connect the power supply 20 after exposure, defined by the block 19, the voltage is missing (logic 0), the output of inverter 21 is a logical "1" and filed with the supply voltage (logic "1"through "schemes And" 22 "OR" 23 is transmitted to the amplifier 25, Savicheva clearance lamp 11. The controller 14 and the sensors 13 remain de-energized.

When lifting the machine is in working condition, the protection device body 26 is connected and transmits signals to exchange information from the base data processing unit 1 to the controller of technical means of the retractable portion 14, through the chain of the transceiver serial transmission information 17, the control unit connection 18, the unit time delay 19 is switched on, the unit is to connect the power supply 20, creating a supply voltage controller 14 and the sensors 13.

Clearance lamp 11 at the same time, as well as other devices that are enabled by the signals bodies 9 in the transmission of information to the controller 14. The start signal transmitter 15. When this clearance lamp 11 is connected through the scheme "OR" 23.

In the illustrative embodiment, (2) when the supply voltage through the conductive ring 7 at the time of charge of the capacitor 32 is activated, the relay 33, the normally open contact which connects the power supply circuit of the controller of technical means of the retractable portion 14. In this case, if the protection device is connected, the connection unit supply voltage 20 connects the relay 34, which generates a power supply voltage controller 14 even after disabling the relay 33.

Clearance lamp 11 when this is turned on by the signal amplifier 25. When the device is turned off security clearance lamp 11 receives power directly from the power source through the conductive ring 7, when the normally closed contacts of the relays 33 and 34 are closed.

1. The protection method of lifting machine with telescopic boom overload, collisions with obstacles, dangerous voltage power lines and invalid mutual displacements equipment, namely, that the basic data processing unit located in the cab lifting machines and lane containing the first computer, the first storage device and the indicator parameters by serial polling signals from the first set of sensors located on the stationary part of the hoisting machine, and by passing through the drum with current-carrying ring and located on the raised part of the hoisting machine, for example the tip of the boom, the controller of technical means proposed part containing the second computer and the second storage device commands to the connected hardware and reception information of the second set of sensors located on the raised part is disconnecting the drives of the lifting mechanisms of the machine, when actual performance exceeds the allowable value, characterized in that provided for the connection of current-carrying ring of the drum through located in the cab body enable marker light one terminal of the source voltage, the second terminal of which is connected with the steel hoisting machine, installing in addition to these basic data processing unit and the controller of technical means proposed part respectively of the first and second transceivers serial communication, the input/outputs are connected to the first and second computers, respectively, of the base unit processing the TCI data and controller of technical means of the retractable part, and second galvanically isolated inputs/outputs connected to the conductive ring, the connection to the first computer additional controller organs enable devices on the raised part, for example, the tip of the boom, or the connection routine basic data processing unit bodies enable devices on the raised parts, for example the tip of the boom to which is connected bodies enable devices on the raised part and the output control unit supply voltage, the input of which is connected to the first output in the cab lifting machine body on the device that is connected to the power bus of the base data processing unit and the first complex of the sensor device, connecting the second output of the body on the device the live ring and the entrance of the body enable the device to the power supply voltage, connect the output of the second transceiver serial data transmission to the input of the control unit connection, the output of which is connected to the first input of the unit delay time, the second input is connected to the conductive ring, and the output connected to the input connection of the supply voltage, the output of which is connected to the same power bus controller technical means of the retractable part and the second set of sensors monitoring the parameter is in, while the second power bus is connected to the metal structure of the hoisting machine, and the output unit connection voltage connected to the inverter input, the output of which is connected to the first input of the logical circuit And the second input of which is connected to the conductive ring, and the output is connected to the first input of the logic circuit OR the second input of which is connected to the output of the second calculator, which also connects the input of the first amplifier, the output of which is connected to the headlight, and the output of the logic circuit OR is connected to the input of the second amplifier, the output of which is connected to the vehicle's lantern.

2. The method according to claim 1, characterized in that in order to close the electrical circuit to transfer power and signals to the retractable part, for example the tip of the arrow is not used, the metal structure of the hoisting machine, and an additional wire connected to the additional conductive rings of the drum.

3. The protection device lifting machine with telescopic boom overload, collisions with obstacles, dangerous voltage power lines and invalid mutual displacements containing equipment located on the stationary part of the hoisting machine drum with conducting ring to which the body enable marker light located in the cab connected to a source of voltage, located in the cabin hoisting machine and through the body on the device that is connected to one terminal of the source voltage of the first set of sensors, control equipment parameters hoisting machine that is connected to the base data processing unit that includes the first computer, the first storage device and the indicator parameters, the second terminal of the supply source connected with the steel hoisting machines located on the raised part, for example, the main boom tip, marker light, spotlight and the second set of sensors monitoring parameters that are connected to the controller of technical means proposed part containing the second computer and the second storage device, characterized in that the base the data processing unit further comprises a first transceiver of the serial communication, the first input/output which is connected to the first transmitter and the second galvanically isolated input/output connected to the conductive ring, and connected to the first calculator extra controller organs enable devices on the raised part of or connected to a subroutine of the basic data processing unit bodies enable devices on the raised parts, which are connected to bodies enable devices on the move part of the boom and the output control unit supply voltage, the inlet of which is connected to the first output of the body on the device that is connected to the power bus of the base data processing unit and the first complex of the sensor device, the second output of the body on the device connected to the conductive ring, and the entrance of the body on the device connected to the power supply voltage, the controller of technical means proposed part further comprises a second transceiver, the serial communication, the first input/output which is connected to the second transmitter, the second galvanically isolated input/output connected to the conductive ring, and the output connected to the input of control unit connection, the output of which is connected to the first input of the unit delay time, the second the inlet of which is connected to the conductive ring, and the output connected to the first input unit connecting the supply voltage, the output of which is connected to the same power bus controller technical means of the retractable part and the second set of sensors monitoring parameters, while the second power bus is connected to the metal structure of the hoisting machine, and the output unit connection voltage connected to the inverter input, the output of which is connected to the first input of the logical circuit And the second input of which is connected to the conductive ring, and the output connection is to the first input of the logic circuit OR, the second input of which is connected to the output of the second calculator, which is also connected to the input of the first amplifier, the output of which is connected to the headlight, and the output of the logic circuit OR is connected to the input of the second amplifier, the output of which is connected to the vehicle's lantern.

4. The device according to claim 3, characterized in that the second galvanically isolated inputs/outputs of the first and second transceivers serial communication can be performed through a transformer or capacitive, or optical connection.

5. The device according to claim 3, characterized in that the drum is provided with an additional conductive ring and the second terminal of the power supply and the second power bus technical means of main boom tip is isolated from the metal hoisting machine and connected to an additional current-carrying ring of the drum.

6. The device according to claim 3, characterized in that the drum is provided with an additional conductive ring that is connected to the second inputs/outputs of the first and second transceivers serial communication.

7. The device according to claim 3, characterized in that the drum is provided with an additional conductive ring that is connected to the second inputs/outputs of the first and second transceivers serial transmission of information and the second additional Toko is riding ring, and the second terminal of the power supply and the second power bus technical means of main boom tip is isolated from the metal hoisting machine and connected to the second additional current-carrying ring of the drum.



 

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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

FIELD: materials handling equipment; load-lifting cranes.

SUBSTANCE: invention is designed to automatically control load-lifting crane and protect crane and load from collision with obstacles at preset capacity. According to proposed method, starting and stopping of drives of mechanisms providing movement of crane equipment is done by action onto crane controls, and disconnection of mechanism drives is carried out by processing of signals from pickups to limit motion or preclude over-load. To reduced level of load swinging, wire rope length pickup and tackle block ratio selector pickup are installed additionally whose signals are used to determine height of load hanging and period of swinging of suspended load. Moments to switch off and switch on crane drive mechanisms are calculated by signals from pickups checking position of crane movable equipment, inertia indices of equipment, actual speeds and accelerations of equipment and starting and disconnection of drives. Crane mechanism drives control mode is created at which killing of oscillations of load both at beginning and stopping of load movement is provided. Device contains travel motion control unit, amplified unit, pickups, load limiting unit, travel limiting unit, load hanging height check unit, suspended load swinging period check unit and crane actuators.

EFFECT: improved reliability of crane in operation.

3 cl, 1 dwg

FIELD: mechanical engineering.

SUBSTANCE: both versions of proposed method provide direct or indirect measurements of parameters characterizing load and/or spatial position of boom, primary processing of results of measurements, if required, and entering the results in memory with provision of possibility of read out. Measured additionally are level or amount of fuel in fuel tank of lifting machine engine, or rate of fuel consumption of load-lifting machine engine with entering of results of measurement in memory and additional processing of results on load lifting machine or in computer after reading out from memory. According to first version, excessive consumption of fuel and/or requirement of preventive or repair works of load-lifting machine is revealed by calculating ratio of fuel consumption at present period of operation of load-lifting machine to total mass of lifted and transported loads at this period of time and comparing this ratio with present values or comparing consumption of fuel when carrying out typical load-lifting and transporting cycles and revealing increase in said consumption in any cycle relative to consumption at previous cycle. According to second version, reduction of level of fuel or its amount to minimum tolerable value is revealed sufficient for carrying out load-lifting and transporting cycle of maximum possible duration, and warning signal is formed in this case. Parameter recorder of load-lifting machine contains load and/or spatial position of boom equipment pickup, engine fuel tank fuel level or fuel amount pickup of load-lifting machine and fuel flow rate pickup of load-lifting machine, calculator on base of microcontroller, memory and indicator.

EFFECT: improved safety of load-lifting machine in operation owing to monitoring presence of fuel in fuel tank.

10 cl, 1 dwg

FIELD: mechanical engineering.

SUBSTANCE: proposed system contains parameters recorder of load-lifting machine, computer and portable readout device with non-volatile memory. Parameters recorder includes load-lifting machine parameters transducers, digital calculator and memory connected to digital calculator, load-lifting machine operating parameters transducers being connected to digital calculator. Portable readout device is made in form of video camera or smartphone or cellular telephone with built-in video camera which is furnished with non-volatile memory and is made for connection to digital calculator of load-lifting machine parameters recorder and to computer. Computer is made for reading data of parameters recorder from portable readout device and subsequent processing of data, and for entering into non-volatile memory image of position of mechanisms of load-lifting machine, and/or its working zone, and/or for transmission of data of load-lifting machine parameters recorder into computer along cellular communication circuit.

EFFECT: enlarged functional capabilities of recording of load-lifting machine parameters, facilitated serving of machine, increased reliability and dependability of recording of load-lifting machine parameters.

20 cl, 1 dwg

FIELD: mechanical engineering; load-lifting cranes.

SUBSTANCE: invention relates to overload and damage protection of load-lifting cranes. According to proposed method, to prevent emergencies preliminarily determined are tolerable values of parameters characterizing load, and/or spatial position of crane boom and/or load gripping member which are memorized and, in process of operation of crane, one of said parameters is measured and compared with tolerable value, and signals are formed to control crane actuators aimed at preventing excess of tolerable value by measured parameter. Determination of parameters characterizing spatial position of boom, load-gripping member, supports, construction members of other crane or any obstacle in height is based on measuring values of barometric pressure in corresponding points and subsequent calculation of heights. Construction is simplifier, and effective protection of spatial position pickups of crane from mechanical damages if provided. Safety of load-lifting crane in operation is improved owing to accurate and effective measuring of distance between crane and obstacles and prevention of emergencies caused by tilting of fixed platform or portal of crane from horizontal position and in case of approaching thunderstorm.

EFFECT: improved safety of load-lifting crane.

25 cl, 1 dwg

FIELD: materials loading machinery.

SUBSTANCE: invention relates to load-lifting crane protection and control devices and to method of crane control after interlocking of crane motion by protection system. proposed method consists n determining tolerable values of parameters characterizing load and/or spatial position of crane boom-or load-gripping member, and/or distance to transmission line, recording the parameters and measuring in process of operation of load-lifting crane by direct or indirect method of at least of one of said parameters and comparing measured value with tolerable one and subsequent forming of control signals by at least one of operating devices of load-lifting crane designed to preclude excess of tolerable value by said parameter. Additionally, by analyzing values and/or changes of parameters of operation of load-lifting crane, prehistory of operation of load-lifting crane is revealed and recorded which leads to forming of said control signals aimed at precluding excess of tolerable value by said parameter, and order of formation of control signals after prevention of said excess is set depending on indicated prehistory.

EFFECT: improved safety of operation of load-lifting crane and provision of convenience in operation.

16 cl, 1 dwg

FIELD: overload protection, controlling and regulation systems for hoisting cranes.

SUBSTANCE: method involves preliminarily determining and memorizing allowable loading values and diagnostic parameter values characterizing technical state of crane hydraulic system; during operation of crane, measuring and comparing loading and diagnostic parameter current values with allowable values; generating warning signal or blocking crane operation; additionally determining rotational velocity of pump shaft or power unit shaft of crane and velocity of crane lever or load-handling device and/or rotary platform of crane; determining current value of diagnostic parameter, with values of these velocities being taken into consideration. System for effectuating said method has digital calculator based on microcontroller, actuating device and operating parameters sensors for hoisting crane and its hydraulic system. Method and system provide for full, reliable and operative diagnosis of hydraulic system enabled owing to controlling of said system during operation of hoisting crane in dynamic modes under loading.

EFFECT: reduced consumption of power for accomplishment of hoisting operations by preventing crane from operation at low efficiency of hydraulic drive.

13 cl, 1 dwg

FIELD: mechanical engineering; control systems of load-lifting cranes.

SUBSTANCE: control signals of load-lifting crane actuators are formed depending on movement of handle of microprocessor control device by crane operator in directions for executing different crane operations and on results of comparison of parameters of crane operation measured by pickups with tolerable values. Setting of parameters of control signals is provided by microprocessor calculator at provision of safe operation of load-lifting crane and convenience for operation of crane operator depending on crane operation, direction and value of shifting control device handle and parameters of crane operation.

EFFECT: improved efficiency of crane, safety of crane in operation and convenience in operation for crane operator.

24 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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