HYDRAULIC DRIVE SYSTEM FOR A BUILDING MATERIAL AND / OR CONCENTRATE PUMP SYSTEM, ... METHOD FOR OPERATION OF HYDRAULIC DRIVE SYSTEM AND / OR BUILDING MATERIAL AND / OR CONCENTRATE PUMP SYSTEM

Abstract

The present invention relates to a hydraulic drive system (1) for a building material and / or thick material pump system (2), the hydraulic drive system (1) comprising a first drive cylinder (3) and a second drive cylinder (4), a first directional control valve (5) and a second directional control valve (6) and a flushing hydraulic fluid device (7), the first directional control valve (5) being configured to connect the first drive cylinder (3) to the second directional control valve (6) in a first switching position (5S1) and to connect the second directional control valve (6) to the flushing hydraulic fluid device (7) in a second switching position (5S2), the second directional control valve (6) being configured to connect the second drive cylinder (4) to the first directional control valve (5) in a first switching position (6S1) and to connect the first directional control valve (5) to the flushing hydraulic fluid device (7) in a second switching position (6S2).

Description

[Technical field]

[0001] The present invention relates to a hydraulic drive system for a building material and / or thick materials pump system, a building material and / or thick materials pump system comprising such a hydraulic drive system, and a method for operating such a hydraulic drive system and / or a building material and / or thick materials pump system. Summary of the Invention

[0002] The present invention is based on the object of providing a hydraulic drive system for a building material and / or thick material pump system, a building material and / or thick material pump system comprising such a hydraulic drive system, a method for operating such a hydraulic drive system and / or a building material and / or thick material pump system, each having improved characteristics.

[0003] The present invention solves the above problem by providing a hydraulic drive system having the features of claim 1, a building material and / or dense material pump system having the features of claim 14 and a method having the features of claim 15. Advantageous developments and / or embodiments of the invention are set out in the dependent claims.

[0004] The hydraulic drive system for a building material and / or thick material pump system according to the invention comprises a first drive cylinder and a second drive cylinder, a first directional control valve and a second directional control valve, and a flushing hydraulic fluid device. The first directional control valve, in particular itself, is configured to connect the first drive cylinder to the second directional control valve by or in a first switching position or to connect the first drive cylinder and the second directional control valve to each other. Furthermore, the first directional control valve, in particular itself, is configured to connect the second directional control valve to the flushing hydraulic fluid device by or in a second switching position or to connect the second directional control valve to the flushing hydraulic fluid device to each other. The second directional control valve, in particular itself, is configured to connect the second drive cylinder to the first directional control valve by or in a first switching position or to connect the second drive cylinder and the first directional control valve to each other. Furthermore, the second directional control valve, in particular itself, is configured to connect the first directional control valve to the flushing hydraulic fluid device by or in the second switching position, or to connect the first directional control valve and the flushing hydraulic fluid device to each other.

[0005] This allows in particular switching positions and connections for various functions of the hydraulic drive system using the first and second directional control valves, in particular for the first drive cylinder and / or the second drive cylinder, in particular only using the first and second directional control valves, thus allowing a low-cost construction of the hydraulic drive system.

[0006] In particular, the first drive cylinder and the second drive cylinder may be similar and / or different.

[0007] The first directional control valve and the second directional control valve can be similar and / or different.

[0008] The first switching position, in particular the respective first switching position, and the second switching position, in particular the respective second switching position, may be different.

[0009] At a given time, the first directional control valve may be in the first switching position or in the second switching position, in particular in either the first switching position or in the second switching position. Additionally or alternatively, at a given time, the second directional control valve may be in the first switching position or in the second switching position, in particular in either the first switching position or in the second switching position.

[0010] The first directional control valve and / or the second directional control valve may be switchable or adjustable or controllable or controllable.

[0011] The first directional control valve may be connected or coupled to the first drive cylinder, the second directional control valve, and the flushing hydraulic fluid device. Additionally or alternatively, the first directional control valve may not or need not be connected or coupled to the second drive cylinder, particularly without the second directional control valve.

[0012] The second directional control valve may be connected or coupled to the second drive cylinder, the first directional control valve, and the flushing hydraulic fluid device. Additionally or alternatively, the second directional control valve may not be or need not be connected or coupled to the first drive cylinder, particularly without the first directional control valve.

[0013] The connection can be made continuous in time and / or independent of the first switching position, in particular the respective first switching position, and the second switching position, in particular the respective second switching position.

[0014] The connection, in particular the respective connection, may in particular connect and / or be connected such that via a line, in particular just one line, in particular the respective line, and / or directly, and / or hydraulic fluid flows, in particular from the respectively first mentioned element to the respectively second mentioned element and / or between the mentioned elements.

[0015] The hydraulic fluid may include, and in particular may be, oil.

[0016] The word component "Ausspeis" can be used synonymously with the word component "Ausspuel".

[0017] In one development of the invention, the first directional control valve is configured in a first switching position not to connect the first drive cylinder to the flushing hydraulic fluid device, in particular without the second directional control valve, not to connect the second directional control valve to the flushing hydraulic fluid device, or not to connect them to each other. Additionally or alternatively, the first directional control valve is configured in a second switching position not to connect the first drive cylinder to the second directional control valve, not to connect the first drive cylinder to the flushing hydraulic fluid device, or not to connect them to each other. Still additionally or alternatively, the second directional control valve is configured in a first switching position not to connect the second drive cylinder to the flushing hydraulic fluid device, in particular without the first directional control valve, not to connect the first directional control valve to the flushing hydraulic fluid device, or not to connect them to each other. Additionally or alternatively, the second directional control valve is configured such that in the second switching position the second drive cylinder is not connected to the first directional control valve, the second drive cylinder is not connected to the flushing hydraulic fluid device, or they are not connected to each other, which in particular the switching position and the non-connection allows for various functions.

[0018] In one development of the invention, a first cylinder connection of the first directional control valve is connected to a first drive cylinder. A second cylinder connection of the second directional control valve is connected to a second drive cylinder. A first flushing connection of the first directional control valve is connected to a flushing hydraulic fluid device. A second flushing connection of the second directional control valve is connected to a flushing hydraulic fluid device. A first valve connection of the first directional control valve and a second valve connection of the second directional control valve are connected to each other. The first directional control valve is configured to connect the first cylinder connection to the first valve connection or to connect them to each other by means of a first switching position. Furthermore, the first directional control valve is configured to connect the first valve connection to the first flushing connection or to connect them to each other by means of a second switching position. The second directional control valve is configured to connect the second cylinder connection to the second valve connection or to connect them to each other by means of a first switching position. Furthermore, the second directional control valve is configured to connect the second valve connection to the second flushing connection or to each other by means of the second switching position. In particular, the first cylinder connection, the second cylinder connection, the first flushing connection, the second flushing connection, the first valve connection and / or the second valve connection may be different. Additionally or alternatively, the first directional control valve may not be or need not be configured to connect the first cylinder connection to the first flushing connection and the first valve connection to the first flushing connection by means of the first switching position, or they may not be or need not be connected to each other. Additionally or alternatively, the first directional control valve may not, and does not need to, be configured to connect the first cylinder connection to the first valve connection and the first cylinder connection to the first flushing connection by means of the second switching position, or they may not, and do not need to be connected to each other.Additionally or alternatively, the second directional control valve may not be, does not have to be, or does not have to be configured to connect the second cylinder connection to the second flushing connection and the second valve connection to the first flushing connection by means of the first switching position, and they do not have to be connected to each other. Additionally or alternatively, the second directional control valve may not be, does not have to be, or does not have to be configured to connect the second cylinder connection to the second valve connection and the second cylinder connection to the second flushing connection by means of the second switching position, and they do not have to be connected to each other.

[0019] In one development of the invention, the first directional control valve is an at least 3-way / at least 2-way first directional control valve, in particular a 4-way / 2-way first directional control valve, in particular with a first unused connection. Additionally or alternatively, the second directional control valve is an at least 3-way / at least 2-way second directional control valve, in particular a 4-way / 2-way second directional control valve, in particular with a second unused connection. This allows for switching positions and connections. In particular, the 4-way / 2-way first directional control valve and / or the 4-way / 2-way second directional control valve allow the use of at least one standard component. This therefore allows for a low-cost construction of the hydraulic drive system.

[0020] In one development of the invention, the first directional control valve is a first cartridge valve and / or a first assembly valve. Additionally or alternatively, the second directional control valve is a second cartridge valve and / or a second assembly valve. This allows for a high flow rate and / or a high pressure of the hydraulic fluid.

[0021] In one development of the invention, the first directional control valve and / or the second directional control valve are configured to be electrically switchable. In particular, the first directional control valve and / or the second directional control valve are configured to be independently switchable to the second switching position, in particular to the respective second switching position, when de-energized. This allows for easy switching of the first directional control valve and / or the second directional control valve. In particular, this allows for a flushing hydraulic fluid cut-off function, in particular of the first directional control valve in the second switching position and the second directional control valve in the second switching position. In particular, the first directional control valve and / or the second directional control valve do not have to be configured to be hydraulically switchable or designed to be hydraulically switchable. Additionally or alternatively, the phrase "in a de-energized state" can be used as a synonym for the term "de-energized". Alternatively, the first directional control valve and / or the second directional control valve may be configured to switch independently to the first switching position, in particular to the respective first switching position, when de-energized.

[0022] In one development of the invention, the first directional control valve is configured to connect one side, in particular the bottom side, of the first drive cylinder to the second directional control valve by means of the first switching position. The second directional control valve is configured to connect a side, in particular the bottom side, of the second drive cylinder that is the same, in particular similar to the one side of the first drive cylinder to the first directional control valve by means of the first switching position. This makes it possible, in particular, for the first directional control valve in the first switching position and the second directional control valve in the first switching position to connect the same side of the first drive cylinder and the second drive cylinder to each other. This therefore makes it possible to advantageously enable a cylinder locking function in particular when connecting the bottom sides of the first drive cylinder and the second drive cylinder to each other.

[0023] In one development of the invention, the hydraulic drive system comprises a first drive piston and a second drive piston, a first piston rod and a second piston rod and at least one, in particular only one, in particular a single water tank. The first drive piston is arranged in a first drive cylinder. The second drive piston is arranged in a second drive cylinder. The first piston rod is attached to the first drive piston. The second piston rod is attached to the second drive piston. Furthermore, the first piston rod and the second piston rod are guided through the at least one water tank. The cylinder locking function, in particular in the case of connecting the bottoms of the first drive cylinder and the second drive cylinder, makes it possible to prevent the at least one water tank from overflowing, in particular when the drive cylinder is pushed back. In particular, the first drive piston and the second drive piston can be similar and / or different. Additionally or alternatively, the first piston rod and the second piston rod can be similar and / or different.

[0024] In one development of the invention, the hydraulic drive system has a swing connection, which connects the first drive cylinder and the second drive cylinder to one another. This is advantageous if the first drive cylinder and the second drive cylinder are connected to each other at the same side, in particular the bottom side. In particular, the swing connection can connect a different side, in particular the rod side, of the first drive cylinder to a different side, in particular the rod side, of the second drive cylinder to one another. Additionally or alternatively, the swing connection can have a swing line, in particular be a swing line.

[0025] In particular, the rod side may refer to the side of the drive cylinder where a piston rod can be attached to the drive piston. Additionally or alternatively, the bottom side may refer to the opposite or opposing side of the drive cylinder. Additionally or alternatively, the first and second drive pistons may be connected by a swing connection, in particular in antiphase.

[0026] In one development of the invention, the flushing hydraulic fluid device comprises a hydraulic fluid tank, in particular and a hydraulic fluid cooler and / or a hydraulic fluid purifier. This allows for the storage or storage, in particular and cooling and / or purification of the hydraulic fluid, in particular the flushed hydraulic fluid. In particular the hydraulic fluid purifier can comprise a filter, in particular can be a filter.

[0027] In one development of the invention, the first and second directional control valves can be switched independently of each other. This allows for a number of functions. In particular, the term "separately" can be used as a synonym for the term "independent".

[0028] In one development of the invention, the hydraulic drive system has a control device. The control device is configured to switch the first directional control valve into a first and / or second switching position and the second directional control valve into a first and / or second switching position, in particular for an alternating flushing function, a flushing hydraulic fluid cut-off function, in particular a known flushing hydraulic fluid cut-off function, and / or a cylinder locking function, in particular a known cylinder locking function. This allows for a good, in particular simple and / or low-cost operation of the hydraulic drive system and / or in particular of the building material and / or thick material pump system thereby. In particular, the control device can be electrical. Additionally or alternatively, the control device can have a processor and / or a memory device, in particular a processor and / or a memory device. Furthermore additionally or alternatively, the term "regulating device" or "control device" can be used as synonyms of the term "control device". Furthermore additionally or alternatively, the terms "regulating", "controlling" or "controlling" can be used as synonyms of the term "switching". Additionally or alternatively, the switching may be automatic.

[0029] In particular, the alternating flushing function allows, in particular realises, a flushing of hydraulic fluid, in particular of the first drive cylinder and / or the second drive cylinder.

[0030] Additionally or alternatively, the flushing hydraulic fluid cut-off function allows, in particular, realizing, flushing of the hydraulic fluid and in particular avoiding a connection between the first and second drive cylinders, in particular such a side-to-side connection of the first and second drive cylinders. Additionally or alternatively, the flushing hydraulic fluid cut-off function allows delaying the switching of the valve during the reversing process. In particular, the reversing process may be a critical moment at which low breakdown pressures may occur. A flushing hydraulic fluid cut-off function immediately before reversing can significantly reduce or even prevent this low breakdown pressure. This may have an advantageous effect on the useful life of the main pump of the hydraulic drive system.

[0031] Additionally or alternatively, the cylinder locking function makes it possible, in particular when connecting the bottom sides of the first and second drive cylinders, to prevent overflow of the at least one water tank, in particular when the drive cylinders are pushed back, and in particular to avoid flushing of hydraulic fluid.

[0032] In one embodiment of the invention, the hydraulic drive system comprises at least one sensor. The at least one sensor is configured to detect the temperature, in particular the value of the temperature, or a temperature variable dependent on the temperature, in particular the value of the temperature variable, and / or the degree of contamination, in particular the value of the degree of contamination, or a degree of contamination variable dependent on the degree of contamination, in particular the value of the degree of contamination variable, of the hydraulic drive system and / or the hydraulic fluid. The control device is configured to switch depending on the detected temperature or the detected temperature variable and / or the detected degree of contamination or the detected degree of contamination variable, in particular for the alternate flushing function. This allows for switching, in particular flushing, as required. This therefore allows for a faster warm-up of the hydraulic drive system and / or in particular thereby reduced wear. This therefore allows for a good, in particular reliable and / or low-cost operation of the hydraulic drive system and / or in particular thereby of the building material and / or thick material pump. In particular, the sensor can be electrical. Additionally or alternatively, the detection can be automatic. Furthermore additionally or alternatively, the hydraulic fluid does not have to be flushed.

[0033] The building material and / or thick material pumping system according to the invention comprises a building material and / or thick material conveying system and a hydraulic drive system, in particular a hydraulic drive system as described above. The building material and / or thick material conveying system is configured to convey the building material and / or thick material. The hydraulic drive system is configured to drive the building material and / or thick material conveying system. In particular, the conveying and / or the driving can be automatic. Additionally or alternatively, the thick material can be sludge. Additionally or alternatively, the building material and / or thick material can be mortar, cement, screed, concrete and / or plaster. In particular, the building material and / or thick material pumping system can be called a concrete pumping system. Additionally or alternatively, the building material and / or thick material pumping system can be configured to be mobile, in particular as an automatic building material and / or thick material pumping system, in particular as a lorry.

[0034] The method according to the invention for operating a hydraulic drive system, in particular a hydraulic drive system as described above, and / or a building material and / or thick material pump system, in particular a building material and / or thick material pump system as described above, in particular comprises the step of switching the first directional control valve into the first or second switching position and the second directional control valve into the first or second switching position, in particular for an alternating flushing function, in particular a known alternating flushing function, a flushing hydraulic fluid cut-off function, in particular a known flushing hydraulic fluid cut-off function, or a cylinder locking function, in particular a known cylinder locking function. In particular the method and / or the operation and / or the switching may be automatic.

[0035] Other advantages and aspects of the invention will become apparent from the appended claims and from the following detailed description of exemplary embodiments of the invention, taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0036] [Figure 1] 1 shows a schematic circuit diagram of a hydraulic drive system according to the invention for a building material and / or thick material pump system according to the invention; [Diagram 2] 2 shows a schematic circuit diagram of a part of the building material and / or concentrate conveying system of the hydraulic drive system of FIG. 1 and the building material and / or concentrate pump system according to the present invention; [Diagram 3] 2 shows a schematic perspective view of a portion of the hydraulic drive system of FIG. 1 having a separate valve block; [Figure 4] 2 shows a schematic perspective view of a portion of the hydraulic drive system of FIG. 1 with an integrated valve block; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] 1 to 4 show a hydraulic drive system 1 according to the invention for a building material and / or thick material pump system 2. The hydraulic drive system 1 comprises a first drive cylinder 3 and a second drive cylinder 4, a first directional control valve 5 and a second directional control valve 6 and a flushing hydraulic fluid device 7. The first directional control valve 5 is designed to connect the first drive cylinder 3 to the second directional control valve 6 by means of a first switching position 5S1, in particular connecting them to each other. Furthermore, the first directional control valve 5 is designed to connect the second directional control valve 6 to the flushing hydraulic fluid device 7 by means of a second switching position 5S2, in particular connecting them to each other. The second directional control valve 6 is designed to connect the second drive cylinder 4 to the first directional control valve 5 by means of a first switching position 6S1, in particular connecting them to each other. Furthermore, the second directional control valve 6 is designed to connect the first directional control valve 5 with the flushing hydraulic fluid device 7 by means of the second switching position 6S2, in particular to connect them with each other.

[0038] In particular, the first directional control valve 5 is designed in a first switching position 5S1 such that it does not connect the first drive cylinder 3 to the flushing hydraulic fluid device 7 and does not connect the second directional control valve 6 to the flushing hydraulic fluid device 7, in particular does not connect them to each other. Additionally or alternatively, the first directional control valve 5 is designed in a second switching position 5S2 such that it does not connect the first drive cylinder 3 to the second directional control valve 6 and does not connect the first drive cylinder 3 to the flushing hydraulic fluid device 7, in particular does not connect them to each other. Still additionally or alternatively, the second directional control valve 6 is designed in a first switching position 6S1 such that it does not connect the second drive cylinder 4 to the flushing hydraulic fluid device 7 and does not connect the first directional control valve 5 to the flushing hydraulic fluid device 7, in particular does not connect them to each other. Additionally or alternatively, the second directional control valve 6 is designed in such a way that in the second switching position 6S2 it does not connect the second drive cylinder 4 to the first directional control valve 5 and does not connect the second drive cylinder 4 to the flushing hydraulic fluid device 7, in particular not connecting them to each other.

[0039] In addition, the first cylinder connection 51 of the first directional control valve 5 is connected to the first drive cylinder 3. The second cylinder connection 61 of the second directional control valve 6 is connected to the second drive cylinder 4. The first flushing connection 52 of the first directional control valve 5 is connected to the flushing hydraulic fluid device 7. The second flushing connection 62 of the second directional control valve 6 is connected to the flushing hydraulic fluid device 7. The first valve connection 53 of the first directional control valve 5 and the second valve connection 63 of the second directional control valve 6 are connected to each other. The first directional control valve 5 is designed to connect the first cylinder connection 51 to the first valve connection 53 by means of the first switching position 5S1, in particular to connect them to each other. Furthermore, the first directional control valve 5 is designed to connect the first valve connection 53 to the first flushing connection 52 by means of the second switching position 5S2, in particular to connect them to each other. The second directional control valve 6 is designed to connect the second cylinder connection 61 to the second valve connection 63, in particular to connect them to one another, by means of a first switching position 6S1. Furthermore, the second directional control valve 6 is designed to connect the second valve connection 63 to the second flushing connection 62, in particular to connect them to one another, by means of a second switching position 6S2.

[0040] Furthermore, the first directional control valve 5 is an at least 3-way / at least 2-way first directional control valve 5', in particular a 4-way / 2-way first directional control valve 5'', in particular having a first unused connection 54. Additionally or alternatively, the second directional control valve 6 is an at least 3-way / at least 2-way second directional control valve 6', in particular a 4-way / 2-way second directional control valve 6'', in particular having a second unused connection 64.

[0041] Additionally, the first directional control valve 5 is a first cartridge valve 5''' and / or a first assembled valve 5''''. Additionally or alternatively, the second directional control valve 6 is a second cartridge valve 6''' and / or a second assembled valve 6''''.

[0042] Furthermore, the first directional control valve 5 and / or the second directional control valve 6 are designed to be electrically switchable. In particular, the first directional control valve 5 and / or the second directional control valve 6 are designed to be independently switchable to the second switching positions 5S2, 6S2 when de-energized.

[0043] Furthermore, the first directional control valve 5 is designed to connect one side 3S, in particular the bottom side 3BS, of the first drive cylinder 3 to the second directional control valve 6 by means of a first switching position 5S1. The second directional control valve 6 is designed to connect one side 3S of the first drive cylinder 3 and a side 4S, in particular the bottom side 4BS, of the same second drive cylinder 4 to the first directional control valve 5 by means of a first switching position 6S1.

[0044] Furthermore, the hydraulic drive system 1 comprises a first drive piston 11 and a second drive piston 12, a first piston rod 13 and a second piston rod 14 and at least one water tank 15. The first drive piston 11 is arranged in a first drive cylinder 3. The second drive piston 12 is arranged in a second drive cylinder 4. The first piston rod 13 is attached to the first drive piston 11. The second piston rod 14 is attached to the second drive piston 12. Furthermore, the first piston rod 13 and the second piston rod 14 are guided through the at least one water tank 15.

[0045] In addition, the hydraulic drive system 1 comprises a swing connection 16. The swing connection 16 connects the first drive cylinder 3 and the second drive cylinder 4 to one another.

[0046] In particular, the swing connection 16 connects the rod side 3TS of the first drive cylinder 3 and the rod side 4TS of the second drive cylinder 4 to one another.

[0047] Furthermore, the flushing hydraulic fluid device 7 comprises a hydraulic fluid tank 17 and in particular also a hydraulic fluid cooler 18 and / or a hydraulic fluid purifier 19 .

[0048] Furthermore, the first directional control valve 3 and the second directional control valve 4 are switchable independently of each other.

[0049] Furthermore, the hydraulic drive system 1 comprises a control device 20. The control device 20 is designed to switch, in particular to switch, the first directional control valve 5 into a first switching position 5S1 and / or into a second switching position and the second directional control valve 6 into a first switching position 6S1 and / or into a second switching position, in particular for an alternating flushing function WAF, a flushing hydraulic fluid shut-off function AHAF and / or a cylinder locking function ZSF.

[0050] In particular, the first directional control valve 5 in the first switching position 5S1 and the second directional control valve 6 in the second switching position 6S2 enable and in particular realize an alternating flushing function WAF, in particular for the first drive cylinder 3. The alternating flushing function WAF enables and in particular realizes a flushing of the hydraulic fluid HF, in particular a flushing of a flow of the hydraulic fluid HF, in particular from the first drive cylinder 3 to the first directional control valve 5, from the first directional control valve 5 to the second directional control valve 6 and from the second directional control valve 6 to the flushing hydraulic fluid device 7, in particular a flushing of a flow of the hydraulic fluid HF.

[0051] Additionally or alternatively, the first directional control valve 5 in the second switching position 5S2 and the second directional control valve 6 in the first switching position 6S2 enable and in particular realize an alternating flushing function WAF, in particular for the second drive cylinder 4. The alternating flushing function WAF enables and in particular realizes a flushing of the hydraulic fluid HF, in particular a flushing of a flow of the hydraulic fluid HF, in particular from the second drive cylinder 4 to the second directional control valve 6, from the second directional control valve 6 to the first directional control valve 5 and from the first directional control valve 5 to the flushing hydraulic fluid device 7, in particular a flushing of a flow of the hydraulic fluid HF.

[0052] In particular, the control device 20 is designed to switch the alternating flushing function WAF between the first drive cylinder 3 and the second drive cylinder 4 periodically, in particular during operation of the hydraulic drive system 1 and / or the building material and / or thick material pump system 2.

[0053] Additionally or alternatively, the first directional control valve 5 in the second switching position 5S2 and the second directional control valve 6 in the second switching position 6S2 enable and in particular realize a flushing hydraulic fluid shut-off function AHAF. The flushing hydraulic fluid shut-off function AHAF enables and in particular realizes the avoidance of flushing of the hydraulic fluid HF, in particular of a flow of the hydraulic fluid HF, in particular enables and in particular realizes the avoidance of flushing of the hydraulic fluid HF, in particular of a flow of the hydraulic fluid HF, from the first drive cylinder 3 and / or the second drive cylinder 4 to the flushing hydraulic fluid device 7.

[0054] Additionally or alternatively, the first directional control valve 5 in the first switching position 5S1 and the second directional control valve 6 in the first switching position 6S1 enable and in particular realize a cylinder locking function ZSF which enables and in particular realizes a connection of the same sides 3S, 4S, in particular the bottom sides 3BS, 4BS, of the first drive cylinder 3 and the second drive cylinder 4 and / or in particular thereby enables and in particular realizes a flow of hydraulic fluid HF from the first drive cylinder 3 to the first directional control valve 5, from the first directional control valve 5 to the second directional control valve 6 and from the second directional control valve 6 to the second drive cylinder 4 and / or from the second drive cylinder 4 to the second directional control valve 6, from the second directional control valve 6 to the first directional control valve 5 and from the first directional control valve 5 to the first drive cylinder 3.

[0055] In particular, the control device 20 is designed not to switch the cylinder lock function ZSF during operation of the hydraulic drive system 1 and / or the building material and / or thick material pump system 2, in particular when the diesel engine of the truck is stopped.

[0056] Furthermore, the hydraulic drive system 1 comprises at least one sensor 21. The at least one sensor 21 is designed to detect, in particular detects, a temperature T or a temperature-dependent temperature variable and / or a contamination degree VG or a contamination degree-dependent contamination degree variable of the hydraulic drive system 1 and / or of the hydraulic fluid HF. The control device is designed to switch, in particular for an alternating flushing function WAF, in dependence on the detected temperature T or the detected temperature variable and / or the detected contamination degree VG or the detected contamination degree variable.

[0057] Furthermore, the hydraulic drive system 1 comprises at least one supply pump 22 and / or at least one drive pump 23. The supply pump 22 is designed and in particular for supplying, in particular for automatically supplying, a hydraulic fluid flow, of hydraulic fluid HF from the flushing hydraulic fluid device 7, and is designed and in particular for supplying, in particular for automatically supplying, a hydraulic fluid flow, of hydraulic fluid HF from the hydraulic fluid tank 17 and / or to the first drive cylinder 3 and / or the second drive cylinder 4. Additionally or alternatively, the drive pump 23 is designed and in particular for generating, in particular for automatically generating, in particular for generating and moving a flow of hydraulic fluid HF, in particular a drive flow (in particular for automatically moving the first drive piston 11 and / or the second drive piston 12).

[0058] In particular, the flushing hydraulic fluid device 7, in particular the hydraulic fluid tank 17, the supply pump 22, the drive pump 23, the first drive cylinder 3 and the second drive cylinder 4 (in particular by means of the swing connection 16), the first directional control valve 5 and the second directional control valve 6 and / or the flushing hydraulic fluid device 7, in particular the hydraulic fluid tank 17, form a drive circuit for the hydraulic fluid HF.

[0059] Furthermore, in the illustrated exemplary embodiment, the first directional control valve 5 and the second directional control valve 6 are integrated or assembled into a valve or control block, in particular into a common valve or control block. In alternative exemplary embodiments, the first directional control valve and the second directional control valve may not or need not be integrated into a valve block.

[0060] In FIG. 3 the valve block is separate or separated from the first drive cylinder 3 and the second drive cylinder 4 .

[0061] In FIG. 4 the valve block, the first drive cylinder 3 and the second drive cylinder 4 are integrated. In other words the first directional control valve 5 and the second directional control valve 6 are integrated in a connection block which is directly connected to the first drive cylinder 3 and the second drive cylinder 4. This makes it possible to save on connection lines and additional blocks. In particular all holes are integrated directly in the "large connection block" which is directly connected to the first drive cylinder 3 and the second drive cylinder 4. There is one, in particular only one, connection to the outside leading to the flushing hydraulic fluid device 7, in particular to the hydraulic fluid tank 17 and / or to the hydraulic fluid cooler 18 and / or the hydraulic fluid purifier 19.

[0062] Figures 1 to 4 show a building material and / or thick materials pumping system 2 according to the invention. The building material and / or thick materials pumping system 2 comprises a building material and / or thick materials conveying system 30 and a hydraulic drive system 1. The building material and / or thick materials conveying system 30 is designed to convey, in particular to convey, building materials and / or thick materials. The hydraulic drive system 1 is designed to drive, in particular to drive, the building material and / or thick materials conveying system 30.

[0063] In detail, the building material and / or dense material conveying system 30 comprises a first conveying cylinder and a second conveying cylinder and a first conveying piston and a second conveying piston. The first conveying piston is arranged in the first conveying cylinder. The second conveying piston is arranged in the second conveying cylinder. The first conveying piston is fitted with a first piston rod 13 for a movement connection to the first drive piston 11. The second conveying piston is fitted with a second piston rod 14 for a movement connection to the second drive piston 12.

[0064] Further reference is made to the technical literature relating to the hydraulic drive system 1, the building material and / or dense material pump system 2 and / or the building material and / or dense material conveying system 30.

[0065] 1 shows a method according to the invention for operating a hydraulic drive system 1 and / or a building material and / or thick material pump system 2. The method comprises switching, in particular by means of a control device 20, a first directional control valve 5 into a first switching position 5S1 or into a second switching position 5S2 and a second directional control valve 6 into a first switching position 6S1 or into a second switching position 6S2, in particular for an alternating flushing function WAF, a flushing hydraulic fluid shut-off function AHAF or a cylinder locking function ZSF.

[0066] Furthermore, the control device 20 has connections, in particular electrical connections, in particular switching connections or signal connections, with, in particular respectively to, the first directional control valve 5 and / or the second directional control valve 6 and / or at least one sensor 21 and / or the supply pump 22 and / or the drive pump 23.

[0067] As the illustrated and described above exemplary embodiments make clear, the present invention provides advantageous hydraulic drive systems for building material and / or thick materials pump systems, advantageous building material and / or thick materials pump systems comprising such hydraulic drive systems, and advantageous methods of operating such hydraulic drive systems and / or building material and / or thick materials pump systems, each having improved characteristics.

Claims

1. A hydraulic drive system (1) for a construction material and / or thick material pump system (2), wherein the hydraulic drive system (1) comprises: a first drive cylinder (3) and a second drive cylinder (4); a first direction control valve (5) and a second direction control valve (6); a flushing hydraulic fluid device (7), and is configured such that: the first direction control valve (5) connects the first drive cylinder (3) to the second direction control valve (6) at a first switching position (5S1), and connects the second direction control valve (6) to the flushing hydraulic fluid device (7) at a second switching position (5S2); the second direction control valve (6) connects the second drive cylinder (4) to the first direction control valve (5) at a first switching position (6S1), and connects the first direction control valve (5) to the flushing hydraulic fluid device (7) at a second switching position (6S2). A hydraulic drive system

2. the first direction control valve (5) is configured such that at the first switching position (5S1), it does not connect the first drive cylinder (3) to the flushing hydraulic fluid device (7) nor connect the second direction control valve (6) to the flushing hydraulic fluid device (7), and / or at the second switching position (5S2), it does not connect the first drive cylinder (3) to the second direction control valve (6) nor connect the first drive cylinder (3) to the flushing hydraulic fluid device (7), and / or the second direction control valve (6) is configured such that at the first switching position (6S1), it does not connect the second drive cylinder (4) to the flushing hydraulic fluid device (7) nor connect the first direction control valve (5) to the flushing hydraulic fluid device (7), and / or at the second switching position (6S2), it does not connect the second drive cylinder (4) to the first direction control valve (5) nor connect the second drive cylinder (4) to the flushing hydraulic fluid device (7); The hydraulic drive system (1) according to Claim 1.

3. a first cylinder connection portion (51) of the first direction control valve (5) is connected to the first drive cylinder (3), and a second cylinder connection portion (61) of the second direction control valve (6) is connected to the second drive cylinder (4), The first flushing connection portion (52) of the first direction control valve (5) is connected to the flushing hydraulic fluid device (7), and the second flushing connection portion (62) of the second direction control valve (6) is connected to the flushing hydraulic fluid device (7). The first valve connection portion (53) of the first direction control valve (5) and the second valve connection portion (63) of the second direction control valve (6) are connected to each other. The first direction control valve (5) is configured to connect the first cylinder connection portion (51) to the first valve connection portion (53) by the first switching position (5S1), and to connect the first valve connection portion (53) to the first flushing connection portion (52) by the second switching position (5S2). The second direction control valve (6) is configured to connect the second cylinder connection portion (61) to the second valve connection portion (63) by the first switching position (6S1), and to connect the second valve connection portion (63) to the second flushing connection portion (62) by the second switching position (6S2). The hydraulic drive system (1) according to claim 1.

4. The first direction control valve (5) is a first direction control valve (5') of at least three-way / at least two-way, and / or The second direction control valve (6) is a second direction control valve (6') of at least three-way / at least two-way. The hydraulic drive system (1) according to claim 1.

5. The first direction control valve (5) is a four-way / two-way first direction control valve (5'') having a first unused connection portion (54), and / or The second direction control valve (6) is a four-way / two-way second direction control valve (6'') having a second unused connection portion (64), and the hydraulic drive system (1) according to claim 4.

6. The first direction control valve (5) is a first cartridge valve (5''') and / or a first assembled valve (5''''); and / or The second direction control valve (6) is a second cartridge valve (6''') and / or a second assembled valve (6''''). The hydraulic drive system (1) according to claim 1.

7. The first direction control valve (5) and / or the second direction control valve (6) is configured to be electrically switchable. The hydraulic drive system (1) according to claim 1.

8. The hydraulic drive system (1) according to claim 7, wherein the first direction control valve (5) and / or the second direction control valve (6) is configured to be independently switched to the second switching position (5S2, 6S2) when de-energized.

9. The first direction control valve (5) is configured to connect one side (3S) of the first drive cylinder (3) to the second direction control valve (6) by the first switching position (5S1), The second direction control valve (6) is configured to connect the side (4S) of the second drive cylinder (4) that is the same as the side (3S) of the first drive cylinder (3) to the first direction control valve (5) by the first switching position (6S1). The hydraulic drive system (1) according to claim 1.

10. The first direction control valve (5) is configured to connect the bottom side (3BS) of the first drive cylinder (3) to the second direction control valve (6), The second direction control valve (6) is configured to connect the bottom side (4BS) of the second drive cylinder (4) to the first direction control valve (5). The hydraulic drive system (1) according to claim 9.

11. The hydraulic drive system (1) includes a first drive piston (11) and a second drive piston (12), wherein the first drive piston (11) is disposed in the first drive cylinder (3) and the second drive piston (12) is disposed in the second drive cylinder (4); the first drive piston (11) and the second drive piston (12); a first piston rod (13) and a second piston rod (14), wherein the first piston rod (13) is attached to the first drive piston (11) and the second piston rod (14) is attached to the second drive piston (12); the first piston rod (13) and the second piston rod (14); at least one water tank (15), wherein the first piston rod (13) and the second piston rod (14) are guided through the at least one water tank (15); and at least one water tank (15) The hydraulic drive system (1) according to claim 1, comprising.

12. The hydraulic drive system (1) is provided with a swing connection part (16), and the swing connection part (16) connects the first drive cylinder (3) and the second drive cylinder (4) to each other. The hydraulic drive system (1) according to claim 1.

13. The flushing hydraulic fluid device (7) has a hydraulic fluid tank (17). The hydraulic drive system (1) according to claim 1.

14. The flushing hydraulic fluid device (7) of the hydraulic drive system (1) according to claim 13 has a hydraulic fluid cooler (18) and / or a hydraulic fluid purifier (19).

15. The first direction control valve (3) and the second direction control valve (4) can be switched independently of each other. The hydraulic drive system (1) according to claim 1.

16. The hydraulic drive system (1) is provided with a control device (20), and the control device (20) is configured to switch the first direction control valve (5) to the first switching position (5S1) and / or the second switching position, and switch the second direction control valve (6) to the first switching position (6S1) and / or the second switching position. The hydraulic drive system (1) according to claim 1.

17. The control device of the hydraulic drive system (1) according to claim 16 is configured to switch for an alternating flushing function (WAF), a flushing hydraulic fluid shut-off function (AHAF), and / or a cylinder lock function (ZSF).

18. The hydraulic drive system (1) is provided with at least one sensor (21), and the at least one sensor (21) is configured to detect the temperature (T) or a temperature variable depending on the temperature, and / or the contamination degree (VG) or a contamination degree variable depending on the contamination degree of the hydraulic drive system (1) and / or the hydraulic fluid (HF). The control device (20) is configured to switch depending on the detected temperature (T) or the detected temperature variable and / or the detected contamination degree (VG) or the detected contamination degree variable. The hydraulic drive system (1) according to claim 16.

19. The hydraulic drive system (1) according to claim 18, wherein the control device (20) is configured to switch depending on the detected temperature (T) or the detected temperature variable and / or the detected contamination level (VG) or the detected contamination level variable for the alternating flushing function (WAF).

20. A building material and / or thick material pump system (2), wherein the building material and / or thick material pump system (2) A conveying system (30) for building materials and / or thick materials, configured to convey building materials and / or thick materials (BDS), the conveying system (30) for building materials and / or thick materials A hydraulic drive system (1) according to any one of claims 1 to 19, configured to drive the building material and / or thick material conveying system (30), the hydraulic drive system (1) A building material and / or thick material pump system (2) comprising the same.

21. A method of operating a hydraulic drive system (1) according to any one of claims 1 to 19, the method comprising Switching the first direction control valve (5) to a first switching position (5S1) or a second switching position (5S2), and switching the second direction control valve (6) to a first switching position (6S1) or a second switching position (6S2). A method including the above.

22. The method according to claim 21, wherein switching the first direction control valve (5) to a first switching position (5S1) or a second switching position (5S2), and switching the second direction control valve (6) to a first switching position (6S1) or a second switching position (6S2) is performed for an alternating flushing function (WAF), a flushing hydraulic fluid shut-off function (AHAF), or a cylinder lock function (ZSF).

23. A method of operating a building material and / or thick material pump system (2) according to claim 20, the method comprising Switching the first direction control valve (5) to a first switching position (5S1) or a second switching position (5S2), and switching the second direction control valve (6) to a first switching position (6S1) or a second switching position (6S2). A method including the above. The method according to claim 23, wherein switching the first direction control valve (5) to the first switching position (5S1) or the second switching position (5S2) and switching the second direction control valve (6) to the first switching position (6S1) or the second switching position (6S2) is performed for an alternating flushing function (WAF), a flushing hydraulic fluid shut-off function (AHAF), or a cylinder lock function (ZSF).

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