Pneumatic lifting gear and method for detecting and recording operating statuses and parameters of a pneumatic lifting gear

Abstract

The invention relates to a pneumatic lifting gear and a method for detecting and recording operating statuses and parameters of a pneumatic lifting gear. In order to provide a pneumatic lifting gear and a method for detecting and recording operating statuses and parameters of a pneumatic lifting gear, which constructionally easily allows for operating statuses and parameters of the lifting gear to be reliably determined with a high level of accuracy, according to the invention, the pneumatic lifting gear comprises a pneumatic motor for lifting and lowering a load, a first fluid inlet of the motor for lifting the load, a second fluid inlet of the motor for lowering the load, and a fluid outlet out of the motor, wherein at least one, preferably two, pressure sensors are arranged in the region of the first and / or the second fluid inlet and at least one further pressure sensor is arranged in the region of the fluid outlet. Furthermore, the pneumatic lifting gear comprises a data processing unit which is designed to detect the pressure values of the pressure sensors and to calculate operating statuses and parameters of the lifting gear therefrom, and a load spectrum recorder for recording the operating statuses and parameters of the lifting gear.

Description

[0001] Description

[0002] PNEUMATIC LIFTING EQUIPMENT AND METHOD FOR RECORDING AND STORING OPERATING STATES AND PARAMETERS

[0003] A PNEUMATIC HOIST

[0004] The invention relates to a pneumatic lifting device and a method for detecting and storing operating states and parameters of a pneumatic lifting device.

[0005] Hoists are known in a wide variety of designs from the state of the art and are used particularly in industrial applications for the suspended lifting and moving of loads. For this purpose, the load is typically secured to a chain, rope, or similar device using a hook or other attachment, and the chain or rope is moved by a drive. The drive comprises a motor, possibly a gearbox, and other components. The motor is typically driven either electrically or by an operating fluid, particularly hydraulically or pneumatically.

[0006] In order to assess the current condition of the hoist and determine various operating states and parameters, hoists with an electric motor and an electric control system can be equipped with a central control unit that monitors the operating processes, including the motor control and the lifted loads, and provides corresponding information on current and past operating states and parameters. Due to the components present in electrically operated hoists, such evaluation, storage, and provision of operating states and parameters is easily possible.

[0007] However, hoists operated by compressed air or another operating fluid typically have a pneumatic or hydraulic control system and a pneumatic or hydraulic motor, making it difficult to evaluate and provide operating states and parameters. While such an evaluation can be performed relatively easily with a hydraulic hoist that is connected and operated in a closed hydraulic circuit and typically has only two motor connections for the hydraulic fluid, pneumatic hoists have the problem that one fluid inlet is provided for each direction of rotation of the motor, and the hoist's motor is not operated in a closed pneumatic fluid circuit.Instead, the compressed air used for propulsion is typically discharged into the environment through a fluid outlet separate from the inlets. This results in a significantly greater dependence on ambient conditions, such as ambient air pressure or dynamic pressure at the fluid outlet, making reliable analysis significantly more difficult. Finally, storing information is not readily possible with a purely fluid-driven hoist, meaning that information about past operating states and parameters of the fluid-driven hoist is not accessible.

[0008] The invention is therefore based on the object of providing a pneumatic lifting device and a method for detecting and storing operating states and parameters of a pneumatic lifting device, which allow the operating states and parameters of the lifting device to be reliably determined with a high degree of accuracy in a structurally simple manner.

[0009] The object is achieved according to the invention by a pneumatic lifting device according to claim 1 and a method for detecting and storing operating states and parameters of a pneumatic lifting device according to claim 10. Advantageous developments of the invention are specified in the dependent claims.

[0010] The pneumatic hoist according to the invention comprises a pneumatic motor for lifting and lowering a load, a first fluid inlet of the motor for lifting the load, a second fluid inlet of the motor for lowering the load, and a fluid outlet from the motor. At least one, preferably at least two, pressure sensors are arranged in the region of the first and / or second fluid inlet and at least one further pressure sensor is arranged in the region of the fluid outlet. Furthermore, the pneumatic hoist comprises a data processing unit designed to record the pressure values ​​of the pressure sensors and to calculate operating states and parameters of the hoist therefrom. Finally, the pneumatic hoist according to the invention comprises a load spectrum memory for storing the operating states and parameters of the hoist.

[0011] The method according to the invention for detecting and storing operating states and parameters of a pneumatic lifting device with a pneumatic motor for lifting and lowering a load, a first fluid inlet of the motor for lifting the load, a second fluid inlet of the motor for lowering the load and a fluid outlet from the motor as well as at least one, preferably at least two pressure sensors which are arranged in the region of the first and / or the second fluid inlet and a further pressure sensor which is arranged at the fluid outlet, comprises the steps of detecting the pressure values ​​of the pressure sensors during operation of the lifting device by means of a data processing unit, followed by calculating operating states and parameters of the lifting device using the detected pressure values ​​of the pressure sensors, and finally storing the operating states and parameters of the lifting device by means of a load spectrum memory.

[0012] The inventors have recognized that using at least two pressure sensors, one at at least one of the fluid inlets and another at the fluid outlet of the motor, the operating states and parameters of a pneumatic hoist can be recorded very precisely in a particularly simple manner, and the corresponding operating states and parameters can be calculated particularly easily based on the obtained pressure values. Furthermore, storing the operating states and parameters in the hoist is particularly advantageous in order to enable long-term, economical operation and needs-based maintenance.

[0013] A pneumatic hoist is fundamentally a hoist for lifting and lowering loads, in which at least the motor provided for lifting and / or lowering the load is driven by the pneumatic operating fluid, in particular by compressed air. The hoist is preferably operated exclusively by the operating fluid and particularly preferably exclusively by compressed air. Likewise preferably, the pneumatic hoist has no external electrical connection, at least for an electric motor, and / or does not require an external power supply for operation. Furthermore, the pneumatic hoist is preferably of modular construction, with the pressure sensors and / or the electronic components, in particular the data processing unit and / or the load spectrum memory, particularly preferably being part of a modular motor unit of the hoist.

[0014] The operating fluid can, in principle, be any gas, for example, air, nitrogen, or a gas mixture. The operating fluid is particularly preferably compressed air, with compressed ambient air being even more preferred. However, the compressed air can also have a different chemical composition than the ambient air. The pressure of the compressed air is generally higher than ambient or normal pressure and is preferably between 1.5 bar and 50 bar, more preferably between 2 bar and 30 bar, even more preferably between 3 bar and 15 bar, and especially preferably between 4 bar and 10 bar.

[0015] The motor of the pneumatic hoist can initially be any gas-powered fluid motor. It is preferably an expansion motor, and particularly preferably a gas expansion motor. Most preferably, the motor is a pneumatically operated vane motor or a compressed air vane motor. Furthermore, the vane motor is preferably provided for driving the hoist and, in particular, a chain of the hoist.

[0016] According to the invention, the motor has a fluid inlet for lifting and lowering a load, as well as a fluid outlet. The fluid inlets lead to or into the pneumatic motor and, when a corresponding operating pressure is applied, enable the load to be raised or lowered by the motor. During lifting, the operating fluid flows through the inlet for lifting through the motor to the outlet, while during lowering, the operating fluid flows through the inlet for lowering through the motor to the outlet.

[0017] Furthermore, the unused inlet can also be used in addition to the motor outlet to discharge a portion of the supplied operating fluid. For example, when using a vane motor, the inlet for lowering also vents the compression chamber during lifting, and the inlet for lifting also vents the compression chamber of the vane motor during lowering. Alternatively, the operating fluid can also be discharged exclusively through a common outlet channel for the lifting and lowering operations. Furthermore, the outlet preferably serves essentially only to discharge the operating fluid away from the motor after the work has been performed, with a silencer preferably being arranged at the outlet to keep the noise emission of the motor as low as possible. In addition, the outlet can have an outlet line of any length for discharging the discharged operating fluid away from the location of the lifting gear.Such an outlet line and / or a silencer and / or a filter and / or the fluid outlet itself can generate a significant back pressure, which should preferably be taken into account when calculating the operating conditions and parameters of the lifting device, in particular by means of a pressure sensor arranged at the outlet.

[0018] In this case, the fluid inlet refers not only to the intake port of the engine itself, but also to the directly connected compressed air line that supplies the pressurized operating fluid to the engine. The compressed air line can be any component or assembly and can be either part of the engine or a separate component. In principle, the compressed air line only needs to be suitable for permanently holding and / or conveying a pressurized, gaseous operating fluid.

[0019] The invention is fundamentally based on monitoring the motor operating pressures of the pneumatic hoist using at least two pressure sensors, and preferably using as many pressure sensors as the number of fluid inlets and the fluid outlet(s). According to the invention, a pressure sensor is arranged in the region of the first and / or second fluid inlet, with at least one further pressure sensor being arranged at the outlet. Furthermore, it is also conceivable to arrange additional pressure sensors on other fluid-carrying parts of the hoist.

[0020] A pressure sensor can in principle be any device for detecting the pressure of the operating fluid. Preferably, the detection is quantitative, and very particularly preferably absolute pressure values ​​are detected. Very particularly preferably, the pressure sensors provide temperature-compensated pressure values. Likewise preferably, all pressure sensors of the pneumatic lifting device are identical to one another. In order to be able to use the detected pressure values ​​for further calculation of the operating states and parameters, the at least two pressure sensors, preferably at least three, very preferably all pressure sensors are connected directly or indirectly to the data processing unit, wherein it is very particularly preferred that the pressure sensors transmit the pressure data directly to the data processing unit. The calculation of the operating states and parameters can take place immediately after the pressure values ​​have been detected.Alternatively, the recorded pressure values ​​and / or other sensor values ​​and / or data can also be initially temporarily stored and then subsequently read out, in particular at periodic time intervals and / or on an ad hoc basis, and used for calculations.

[0021] The data processing unit is an electronic device designed to receive and process data. Preferably, the data processing unit also enables data transmission and, particularly preferably, bidirectional communication with an external component. The data processing unit can also be used as a control unit for the pneumatic lifting device, in particular for controlling valves, especially electropneumatic valves, electrical loads, sensors, and / or other computing units.

[0022] According to the invention, the load spectrum memory is provided for storing the calculated and / or measured operating states and parameters, with permanent storage preferably being possible, particularly even in the event of an interruption in the power supply, by means of the load spectrum memory. The load spectrum memory can, in principle, be any data storage device and / or have any data storage medium, which, however, is preferably non-volatile. Furthermore, the load spectrum memory can be either part of the data processing unit or an independent component. Thus, the load spectrum memory can be either a function of the data processing unit or an independent device.According to the invention, the function of the load spectrum memory is to store the operating states and parameters of the specific hoist at least over a longer period of time and preferably over the entire operating period of the hoist from its first commissioning, so that particularly preferably a complete data set, e.g. on the use and / or load, of the respective hoist is available.

[0023] In general, all electronic components, in particular the data processing unit and the load spectrum memory, as well as any other electronic components, can be arranged at any position in the area of ​​the hoist and / or directly on and / or in the hoist. In a preferred embodiment, the electronic components, possibly with the exception of the pressure sensors, are arranged entirely in a manual control of the hoist, making them easily accessible to a user. Alternatively, it is also conceivable for all electronic components and / or the logic to be arranged in the hoist or in the part of the hoist containing the motor and / or a gearbox, and / or for the manual control to have means for data and / or signal outputs and / or inputs.

[0024] The operating states and parameters can be the recorded pressure itself, values ​​calculated and / or derived from it, and other parameters of the hoist or its operation. The operating states and / or parameters can be, in particular, the current load on the hoist, the motor torque, the previous load hours or operating time, and in particular the previous full load cycles of the hoist. However, information about the operating times, the lifting and / or lowering speed, the lifting and / or lowering distance, maintenance that has been carried out, omitted, and / or required in the future, the applied operating fluid pressure, the operating temperature and / or temperatures within the hoist, and / or other data relating to the operation of the hoist can also be operating states and parameters within the meaning of this invention.

[0025] In principle, the operating states and parameters can be determined and / or calculated in any desired manner. Preferably, the operating states and parameters are calculated at least partially based on a characteristic map determined for the respective hoist type, and particularly preferably for the respective hoist. The characteristic map can be determined externally for the respective hoist and programmed into the data processing unit, or it can be determined during operation by the data processing unit itself.

[0026] In a further preferred embodiment of the pneumatic hoist according to the invention, a pressure sensor is arranged in the region of each of the first and second fluid inlets, so that, together with the pressure sensor at the fluid outlet, three pressure values ​​can be recorded at any time at the motor openings relevant to the operating fluid and thus to operation. Accordingly, this enables a particularly precise determination or calculation of the operating states and parameters of the hoist.

[0027] In a further preferred embodiment of the pneumatic hoist according to the invention, the data processing unit evaluates the pressures of the at least two pressure sensors, and preferably all three pressure sensors, and / or performs a quantitative evaluation to calculate the operating states and parameters. In particular, an evaluation of pressure differences is preferred. The evaluation can advantageously not only provide information about the exceedance of specified limit values, but also enables precise recording of the current operating state and the current operating parameters of the hoist.

[0028] In a likewise preferred embodiment of the pneumatic lifting device according to the invention, at least one, preferably several, and particularly preferably all of the operating states and parameters from the group of the current load or load of the lifting device, the speed of lifting and / or lowering, the number of usage cycles, and / or the service life are calculated by means of the data processing unit and / or on the basis of the recorded pressure values, in particular the pressure difference and / or the pressure fluctuations. The current load or the currently suspended load is preferably calculated directly from the pressure difference, since the pressure difference results directly from the suspended load. The pressure sensors are preferably at least sufficiently accurate to be able to determine the suspended load to within a deviation of 20%, particularly preferably of 10%, and most particularly preferably of 5%.Furthermore, it is preferred that the pneumatic lifting device has a real-time clock or a real-time clock module in order to be able to record the exact time and duration of operation.

[0029] A pressure analysis for determining the speed of raising and / or lowering is preferably carried out based on pressure fluctuations that occur when an engine vane or other engine component moves past at least one of the fluid inlets and / or the fluid outlet. The number of revolutions or the speed of the engine can be determined accordingly, which also allows the raised and lowered distance and, in particular, the chain stroke or service life to be directly determined, and the chain lowering can be calculated. The number of usage cycles can also be determined accordingly.

[0030] Furthermore, the data processing unit and / or the recorded pressure values ​​can also be used to monitor whether the pneumatic hoist is operating within permissible limits, in particular the maximum load and / or maximum speed. If one of these values ​​is exceeded, in particular an overload, this can be stored, reported to another data processing unit, and / or displayed to the user. Furthermore, it is also possible to monitor whether the fluid pressure is sufficiently high to operate the pneumatic hoist.

[0031] In order to be able to better assess the loading of the hoist to date, a preferred embodiment of the pneumatic hoist according to the invention is one in which the total load of the hoist is calculated and / or stored by means of the data processing unit and / or on the basis of the recorded pressure values ​​and by means of the load spectrum memory, wherein the theoretical full load hours and / or a calculation is preferably carried out based on the previous full load cycles and / or the total load is stored as theoretical full load hours and / or as completed full load cycles. In this case, the degree of loading relative to the full load, in particular the full load intended for the specific hoist, is preferably determined and the actual usage time is scaled down to a full load or corrected, if necessary taking into account a correction factor.

[0032] In particular, by comparing current and past operating states and parameters, not only can the current operating state be recorded, but a forecast of the future operating state can also be made with a defined and / or constant load on the hoist. Accordingly, a maintenance interval can be determined, and the next required maintenance time can be at least estimated or even determined. Furthermore, current error states and irregularities can be recorded using the data processing unit and / or based on the recorded pressure values ​​and reported to a user or an external data processing unit if necessary. Furthermore, necessary or imminent maintenance and / or the need to lubricate or oil a component of the hoist, in particular the motor and / or chain, can also be reported to a user.Such a message can be provided as a text output, graphically, in particular on a display, and / or visually, in particular by means of an indicator lamp and / or an LED. Finally, it is preferred that performed activities, such as maintenance, repair, or replacement of a component of the hoist, can be reported by a user and then, particularly preferably, subsequently stored in the hoist, in particular in the load spectrum memory.

[0033] In a preferred embodiment of the pneumatic lifting device according to the invention, the load spectrum memory has at least one, preferably at least two long-term data memories, wherein the data storage of at least some of the operating states and parameters is particularly preferably carried out redundantly in at least two long-term data memories, whereby the operating states and parameters can be stored permanently and in particular reliably and tamper-proof.

[0034] Furthermore, the pneumatic hoist preferably has a digital communication interface for reading the operating states and parameters on the hoist and / or on the manual control. The communication interface is provided for reading and / or transmitting at least some of the operating states and parameters, preferably all data from the data processing unit and / or the load spectrum memory. Both purely one-way communication, i.e., reading the operating states and parameters, and bidirectional and / or interactive communication, in particular with feedback and / or for controlling the data processing unit, are conceivable.However, it is particularly preferred that the load spectrum memory and / or the operating states and / or parameters stored therein can only be accessed for reading and not writing, in order to ensure the reliability of the operating states and / or parameters stored therein. The communication interface can also be used to inform a user and / or for access by a service technician and / or for connection to an external control system. Furthermore, a communication interface can also be provided via a program for a computer or a mobile device, in particular a tablet or a mobile phone.

[0035] In particular, a communication interface to a higher-level controller and / or a central control room is preferred. A communication interface to a PLC controller is also preferred. The communication interface can be designed as desired, although a standardized design is preferred. Communication can take place via any data cable or protocol, such as an Ethernet, bus, modem, or USB cable, or wirelessly, such as via radio, GSM, WLAN, NFC, RFID, Bluetooth, or other protocols.

[0036] A preferred embodiment of the method according to the invention for detecting and storing operating states and parameters of a pneumatic lifting device provides that the operating states are calculated based on the pressure difference between two pressure sensors. The pressure difference is particularly preferably evaluated by comparing the pressure on the lifting side of the motor and the lowering side of the motor. The pressure difference can be used to determine, among other things, the current load and / or the motor's rotational speed and the lifting or lowering speed of the load from pressure fluctuations.

[0037] It is also preferred that a third pressure value, in particular from a pressure sensor arranged in the region of the fluid outlet of the motor, is also taken into account when calculating the operating states and parameters and is particularly preferably used to standardize or correct hoist-specific and / or environment-specific factors. Hoist-specific factors can be, for example, power losses due to mechanical friction in components of the hoist, the dead weight of the hook and / or chain, the design or length of a fluid outlet and factors due to the respective design of the hoist and in particular of the motor. Environment-specific factors include the ambient temperature, the ambient pressure, the air humidity and also the type and properties of the operating fluid used for operation, in particular compressed air.

[0038] In addition, a further development of the method according to the invention for detecting and storing operating states and parameters of a pneumatic lifting device is preferred, in which the engine torque and / or an engine speed is calculated based on the ratio and particularly preferably exclusively based on the ratio of the three pressure values ​​of all three pressure sensors.

[0039] An embodiment of a pneumatic lifting device according to the invention is explained in more detail below with reference to the drawing.

[0040] Fig. 1 is a schematic view of a structure of a pneumatic lifting device with a pneumatic control.

[0041] A pneumatically operated hoist 1, shown in Fig. 1, is mounted on a hall ceiling for lifting and lowering loads using a hook on a chain. Hoist 1 has a pneumatic vane motor 2 as the drive. Accordingly, hoist 1 is connected to the hall ceiling with at least one compressed air line, with the compressed air line being connected to a compressed air supply line 17 of hoist 1. There is no electrical connection, since a pneumatically operated hoist 1 usually does not require a power supply.

[0042] In order to be able to lift and lower a load by means of the hoist 1 when an appropriate operating pressure is applied to a compressed air supply line 17, the motor 2 has a fluid inlet 3, 4 for lifting and for lowering, as well as a fluid outlet 13. During lifting, the compressed air flows through the first fluid inlet 3 for lifting through the motor 2 to the fluid outlet 13, while during lowering, the compressed air flows through the second fluid inlet 4 for lowering through the motor 2 to the fluid outlet 13. Due to the use of a vane motor 2, the second fluid inlet 4 also vents a compression chamber of the motor 2 for lowering during lifting, and the first fluid inlet 3 vents the compression chamber of the vane motor 2 for lifting during lowering. The fluid outlet 13 primarily serves only to discharge the compressed air and has a silencer (not shown) in order to keep the noise emission of the motor 2 as low as possible.The opening and closing of the two fluid inlets 3, 4 is controlled by a pneumatic valve 19, 20 arranged in the fluid inlets 3, 4.

[0043] In order to determine various operating states and parameters, including the currently lifted load, the lifting or lowering speed, the total service life to date, and the full-load cycles performed by the hoist 1, a pressure sensor 5, 6 is arranged in each of the two fluid inlets 3, 4. In addition, another pressure sensor 14 is also arranged at the fluid outlet 13 of the motor 2.

[0044] The evaluation of the pressure values ​​determined by the pressure sensors 5, 6, 14 for calculating the operating states and parameters then takes place in a data processing unit 7, to which the pressure sensors 5, 6, 14 are connected. The calculated operating states and parameters are also stored in a non-volatile load spectrum memory 8, particularly for summing the continuously determined operating states and parameters, such as the total service life and the theoretically calculated full-load cycles.

[0045] For operation by a user, the hoist 1 has a hand control 9, by means of which the lowering and lifting of a load on the hook of the chain can be controlled. For this purpose, the hand control 9 has two actuation buttons as a control element 11. The hand control 9 is connected to the hoist 1 via compressed air lines and controls the two valves 19, 20 at the fluid inlets 3, 4 via a pneumatic control line 15, each, in particular via one of the actuation buttons.

[0046] Furthermore, the pneumatic hoist has a display on a housing as a display element 12, on which the operating states and parameters can be called up and on which errors and warnings can be displayed.

[0047] 1 pneumatic hoist

[0048] 2 pneumatic motor

[0049] 3 first fluid inlet

[0050] 4 second fluid inlet

[0051] 5 first pressure sensor

[0052] 6 second pressure sensor

[0053] 7 Data processing unit

[0054] 8 load spectrum storage

[0055] 9 Hand control

[0056] 11 Controls

[0057] 12 display elements

[0058] 13 Fluid outlet

[0059] 14 additional pressure sensors

[0060] 15 pneumatic control line

[0061] 16 Communication interface

[0062] 17 Compressed air supply line

[0063] 19 first valve

[0064] 20 second valve

Claims

Claims 1. Pneumatic hoist (i) comprising a pneumatic motor (2) for raising and lowering a load, a first fluid inlet (3) of the motor (2) for raising the load, a second fluid inlet (4) of the motor (2) for lowering the load, and a fluid outlet (13) from the motor (2), at least one pressure sensor (5, 6) arranged in the region of the first and / or the second fluid inlet (3, 4), at least one further pressure sensor (14) arranged in the region of the fluid outlet (13), a data processing unit (7) formed to acquire the pressure values ​​of the pressure sensors (5, 6, 14) and to calculate operating states and parameters of the hoist (1) from them, and a load collective memory (8) for storing the operating states and parameters of the hoist (1).

2. Pneumatic lifting device according to claim 1, characterized in that a pressure sensor (5, 6) is arranged in the area of ​​the first and the second fluid inlet (3, 4).

3. Pneumatic lifting device according to claim 1 or 2, characterized in that the data processing unit (7) is used to evaluate the pressure difference from at least two pressure sensors (5, 6) to calculate the operating states and parameters.

4. Pneumatic lifting device according to at least one of the preceding claims, characterized in that the operating states and parameters of the current load of the lifting device (1), the lifting speed and the lowering speed are determined by means of the data processing unit (7) and / or on the basis of the recorded pressure values. The number of usage cycles and the service life are calculated based on kens.

5. Pneumatic lifting device according to at least one of the preceding claims, characterized in that the total load of the lifting device (1) is calculated and stored by means of the data processing unit (7) and / or on the basis of the recorded pressure values ​​and by means of the load collective storage (8), wherein a calculation of the full load cycles is carried out and the total load is stored as the number of full load cycles.

6. Pneumatic lifting device according to at least one of the preceding claims, characterized in that the degree of wear of the lifting device (1) or of a component of the lifting device (1) and / or a remaining time until the next maintenance is calculated by means of the data processing unit (7) and on the basis of the recorded pressure values.

7. Pneumatic lifting device according to at least one of the preceding claims, characterized in that the load collective memory (8) has at least two long-term data storage devices, wherein the data storage of at least a part of the operating states and parameters is redundant in the at least two long-term data storage devices.

8. Pneumatic lifting device according to at least one of the preceding claims, characterized in that the pneumatic motor (2) is a vane motor.

9. Pneumatic lifting device according to at least one of the preceding claims, characterized by a digital communication interface (14) for reading the operating states and parameters on the lifting device (1) and / or on the hand control (9).

10. Method for recording and storing operating states and parameters of a pneumatic hoist (1) with a pneumatic motor (2) for lifting and lowering a load, a first fluid inlet (3) of the motor (2) for lifting the load, a second fluid inlet (4) of the motor (2) for lowering the load and a fluid outlet (13) from the motor (2), at least one pressure sensor (5, 6) located in the area of ​​the first and / or the second fluid inlet (3, 4) and a further pressure sensor (14) located at the fluid outlet (13), comprising the steps: Acquisition of the pressure values ​​of the pressure sensors (5, 6, 14) during operation of the hoist (1) by means of a data processing unit (7), Calculation of operating states and parameters of the hoist (1) using the recorded pressure values ​​of the pressure sensors (5, 6, 14), Storing the operating states and parameters of the lifting device (1) using a load collective memory (8). Method for acquiring and storing operating states and parameters of a pneumatic lifting device (1) according to claim 10, characterized in that the calculation of the operating states is based on the pressure difference of at least two pressure sensors (5, 6, 14). Method for acquiring and storing operating states and parameters of a pneumatic lifting device (1) according to claim 10 or 11, characterized in that the calculation of the operating states is based on the pressure difference between the two pressure sensors (5, 6) at the two fluid inlets (3, 4), taking into account the pressure measured by the pressure sensor (14) at the fluid outlet (13) of the motor (2).

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