System for collecting drilling mud

Abstract

The invention relates to a system for collecting drilling mud generated during operation of a core drilling machine, where the system comprises a collecting device as a functional unit, where the collecting device can be attached to a substrate by means of a vacuum, where the vacuum can be generated by a vacuum pump as part of a drive unit of the system. The drive unit additionally comprises a power supply unit for supplying power to the drive unit and components thereof.

Description

Technical Field

[0001] The present invention relates to a system for collecting drilling mud generated during operation of a core drilling machine, wherein the system comprises a collecting device as a functional unit, wherein the collecting device is attachable to a substrate by means of a vacuum, wherein the vacuum can be generated by a vacuum pump as part of a drive unit of the system. The drive unit additionally comprises a power supply unit for supplying electrical power to the drive unit and its components. Background Art

[0002] In the field of core drilling machines, various devices for collecting drilling mud generated during the execution of the core drilling operation are known. For example, water collecting rings that can be attached to the substrate using mechanical fastening devices (such as clamps or clamping devices) are known. Other devices are attached to the substrate by means of a vacuum generated by a suction device. However, mechanical fastening devices are associated with the disadvantage that they cannot usually be removed from the substrate non-destructively and therefore minor damage to the substrate cannot be excluded.

[0003] When attaching the water collecting rings by means of vacuum, the problem is that the water collecting rings can only be attached to the substrate and remain on the substrate when the suction device is turned on and in operation. However, continuous operation of the suction device is not required to carry out core drilling, and the suction device consumes a particularly large amount of electricity, especially when idle. This disadvantage is even more serious when using battery-powered suction devices, which have only a limited amount of on-board power due to the fact that they supply electricity from batteries or the like. However, even when using mains-powered suction devices, it is obvious that attaching conventional water collecting rings by means of suction devices leads to unnecessarily high energy consumption. In addition, continuous operation of the suction device may lead to increased noise pollution on the construction site.

[0004] Furthermore, if the water collecting ring can only be attached to the substrate when the suction device is in operation, a further disadvantage is that the drilling site or the construction site cannot be prepared for the core drilling to be carried out. However, this would be desirable for an efficient workflow on the construction site.

[0005] When using a suction device with automatic false air cleaning of the filter, there is a risk that the water collecting ring will become detached from the wall or the base, since the suction capacity of the suction device may be reduced during the filter cleaning.

[0006] The object on which the present invention is based is to overcome the above-mentioned drawbacks and disadvantages of the prior art and to provide a system for collecting drilling mud, with which the performance of the core drilling operation can be assisted in a time- and energy-efficient manner. In particular, when the system to be provided is used in conjunction with a battery-powered suction device in order to remove drilling mud from the working area of ​​a core drilling machine, the system is not intended to shorten the operating time of the battery-powered suction device, but rather to help increase the "battery charge" run-time. Furthermore, the system should be easy and simple to attach to a substrate and should ensure good adhesion to different surfaces, including rough surfaces. In addition, the person skilled in the art will welcome the fact that the system to be provided can be used for many different sizes of drill bits for core drilling machines.

[0007] This object is achieved by the subject matter of independent claim 1. Advantageous embodiments of the subject matter of independent claim 1 can be found in the dependent claims. Summary of the invention

[0008] According to the invention, a system for collecting drilling mud generated during operation of a core drilling machine is provided. The collecting system comprises a collecting device as a functional unit, wherein the collecting device is attachable to a substrate by means of a vacuum, wherein the vacuum can be generated by a vacuum pump as part of a drive unit of the system, wherein the drive unit additionally comprises a power supply unit for supplying power to the drive unit and its components.

[0009] The invention can provide a collecting system which can be attached to a substrate independently of the core drilling machine and / or an external suction device. Application tests have shown that the system can be attached to a substrate particularly easily and quickly at the operating site, making it possible to ensure rapid preparation for use. In particular, the system can be attached to a substrate before the actual start of core drilling, since the vacuum for attaching the system is generated by the system itself or its vacuum pump. In this respect, the attachment of the proposed collecting system is independent of the use or operation of the suction device for extracting the drilling mud. Furthermore, the invention can reduce noise emissions at the construction site and can also reduce energy consumption.

[0010] The system comprises a drive unit and a functional unit, wherein the functional unit has a collecting device, which can be arranged around the drill head of the core drilling machine or the drilling site. When the core drilling is carried out, the drilling mud is collected in the inner space of the collecting device, wherein this drilling mud can be extracted from the inner space of the collecting device by a suction device. For this purpose, the collecting device can have an extraction opening, which is open to the inner space of the collecting device and can be connected to the suction device via a suction hose. The functional unit comprises a vacuum pump and a power supply device, wherein the power supply device is arranged to supply power to the vacuum pump.

[0011] In the context of the present invention, it is preferred that the drive device can be detachably fastened to the functional unit. In other words, the drive unit and the functional unit represent two separately formed units, wherein the proposed collection system can therefore have a modular design. In the context of the present invention, the term "modular" preferably means that the collection system comprises a drive unit with a power supply device and a vacuum pump and a functional unit with a collection device and an optional vacuum plate, wherein the functional unit and the drive unit are designed to be detachable from each other and can be used separately. For example, the functional unit can be used at different construction sites together with different drive units. Alternatively, if, for example, smaller or larger boreholes are to be created, preferably with drill bits of different sizes, the same drive unit may be used with different functional units at the same construction site. By separating the drive unit from the functional unit, the user can use the separated units in a particularly flexible manner, and the system can be used to cover a wide range of drill bits of different sizes.

[0012] In one embodiment of the invention, the functional unit comprises a vacuum plate for transferring vacuum to the substrate. In the operating state of the proposed collection system, the functional unit and the drive unit are attached to each other so that a vacuum can be generated by the vacuum pump of the drive unit and the vacuum can be transferred to the substrate on which the collection system is to be mounted by means of the vacuum plate. In the context of the present invention, the concept of transferring vacuum to the substrate by means of the vacuum plate preferably means that the vacuum plate has voids and / or cavities on the bottom side, wherein the voids and / or cavities can be evacuated, i.e. evacuated, by means of a vacuum pump. When the vacuum plate (preferably with its bottom side) rests on the substrate to which the collection system is to be attached, the substrate closes the previously open voids and / or cavities so that an evacuable space is created. This can be evacuated by means of a vacuum pump so that there is a lower pressure in the voids and / or cavities of the vacuum plate than in the environment of the collection system. This lower pressure (which is also preferably referred to as negative pressure or vacuum in the context of the present invention) allows the collection system to be attached to the substrate. It is preferred in the context of the present invention that the proposed collecting system is pressed against the substrate by the pressure difference between the pressure in the environment of the system and the pressure in the vacuum chamber and is thereby securely fastened.

[0013] The proposed collection system can also be used with a core drilling machine. The core drilling machine is designed to cut a substantially cylindrical drill core from a substrate. The substrate can be, for example, stone, masonry or concrete, but is not limited thereto. After the drill core has been cut out, a hollow cylindrical hole is retained in the substrate to be processed, in which, for example, a cable shaft, a pipe or a pipeline can be laid. In the context of the present invention, the location where the drill hole is to be introduced into the substrate is called a "drilling location" or "drilling site". In order to cut out a substantially cylindrical drill core, the core drilling machine can include a drill bit, which can be attached to the core drilling machine by a tool holder. On its front side, the drill bit can include cutting segments, which can be inlaid with, for example, artificial diamonds or diamond sheets in order to increase the cutting capacity of the drill bit. In this case, the term "diamond drill bit" is generally used. The core drilling machine can be a handheld core drilling machine, which is held by a user and driven into the substrate. However, it can also be preferred in the context of the present invention that the core drilling machine is attached to a drilling rig during its operation so that the drilling rig holds the core drilling machine. In this case, the propulsion can be generated by a so-called feed device. The feed device can, for example, be formed by an automatic additional module, which can be connected to a core drilling machine and / or a drilling machine. However, the feed device can also be formed as a hand wheel, which is used to drive the core drilling machine into the substrate. In addition, the proposed system can be used with a hammer drill. The functional unit can, for example, comprise a dust collecting device or can be formed by a dust collecting device.

[0014] In a very particularly preferred embodiment, the proposed collection system can be operated with a core drilling machine and connected to the core drilling machine if necessary. It is preferred in the context of the present invention that the collection device of the collection system is designed as a collection ring, wherein the collection ring can be placed around the drill head of the core drilling machine or around the drilling site. The collection ring preferably has an inner side, which faces the drill head of the core drilling machine when the collection system interacts with the core drilling machine. On this inner side of the collection ring, an extraction opening can be provided, through which drilling mud or the like can be extracted from the inner space of the collection ring. Drilling mud is, for example, generated during the operation of the core drilling machine when dust or particles are drilled out, released when the drill core is cut off, mixed with water. Water is used during core drilling, on the one hand, in order to cool the drill head, and on the other hand, in order to bind the drilling dust generated during drilling and prevent the dust from entering the respiratory tract of the user of the core drilling machine. If a drilling mud collection system is not used during core drilling, the drilling mud may spread or disperse unhindered around the drilling site or on the construction site, resulting in large-scale pollution and water damage. By means of the proposed collecting system, the drilling mud can be extracted at the origin, preferably in the inner space of the collecting ring, and thus removed directly. This prevents large-scale contamination and possible water damage right from the start and significantly reduces the cleaning and disposal effort after the core work is completed.

[0015] After the core drilling work has been completed, the proposed collection system can be disassembled and transported away from the site. For this purpose, the drive unit and the functional unit of the system can be disassembled and stored and / or transported separately. The core drilling operation is usually carried out with drill bits of different diameters, depending on how large the desired borehole is. Therefore, it is convenient that the proposed collection system includes collecting rings of different sizes and different diameters. In this way, optimal drilling mud extraction can be ensured, wherein the size of the collecting ring is advantageously matched to the diameter of the drill bit. In other words, the size of the collecting ring can correspond to the diameter of the collecting ring. Therefore, the collection system can advantageously be provided as a kit including collecting rings of different sizes. By separating the drive unit and the functional unit of the system, the possibility of providing the proposed collection system as a kit is possible. By making the drive unit and the functional unit detachable from each other, the drive unit can be used with different collecting rings and / or vacuum plates. In particular, only the service provider performing the core drilling work needs to purchase a cost-intensive drive unit, which can then be used with different collecting rings and / or vacuum plates, wherein the collecting ring and / or vacuum plate are the cheapest to purchase.

[0016] The collecting ring and the vacuum plate can be designed to be detachably connected. However, the collecting ring and the vacuum plate can also form a unit with each other. For example, the first end of the suction hose can lead into the vacuum plate, wherein an opening to the extraction opening of the collecting ring is provided in the vacuum plate. The extracted drilling mud is then sucked from the extraction opening through the line and through the suction hose in the direction of the suction device.

[0017] The drilling mud is preferably extracted by means of a suction device, which can be connected to the collection system, in particular to the functional unit or the collecting ring, via a suction hose. For example, a first end of the suction hose leads to an extraction opening of the collecting ring, while a second end of the suction hose is connected to the suction device. The suction device may comprise a receiving container for receiving the drilling mud. In the context of the present invention, it may be preferred to filter the drilling mud and reuse the filtered water.

[0018] In the context of the present invention, it is preferred that the functional unit comprises a vacuum plate for transferring the vacuum to the substrate. Preferably, the vacuum plate has a lower side and an upper side. On its bottom side, the vacuum plate may have a gap and / or a cavity that may form a vacuum chamber in the context of the present invention. A vacuum may be generated in the vacuum chamber of the vacuum plate by means of a vacuum pump of the drive unit, wherein the vacuum is preferably lower than the ambient pressure or atmospheric pressure surrounding the collection system. As a result, the collection system may be attached to the substrate, wherein the substrate may be processed using a core drilling machine, for example by drilling holes in the substrate. The drive unit may, for example, be provided as a separate, detachably attached unit on a preferably planar surface of the vacuum plate. In the context of the present invention, it is preferred that an interface is used to attach the drive unit to the functional unit or the vacuum plate. In other words, the drive unit may be attached to the functional unit and / or to the vacuum plate of the functional unit by means of an interface. The interface is preferably a mechanical interface for connecting the drive unit to the functional unit or the vacuum plate.

[0019] It is preferred in the context of the present invention that the vacuum panel is formed in several parts. According to the present invention, it is preferred that the functional unit comprises at least one vacuum panel. In the context of the present invention, the at least one vacuum panel can be referred to as a central vacuum panel or main vacuum panel of the functional unit or of the collection system. The central vacuum panel or main vacuum panel is preferably designed to support the drive unit and / or guide the suction hose so that the suction hose passes into the extraction opening of the extraction ring. In addition to the central vacuum panel, the functional unit can include further vacuum panels, which can be arranged, for example, on the circumference of the collection ring. For the purposes of the present invention, the use of multiple vacuum panels is preferably referred to as the use of "multi-part vacuum panels". In an exemplary embodiment of the present invention, the functional unit can include, for example, a central vacuum panel or main vacuum panel and two additional auxiliary vacuum panels. The existing vacuum panels can be distributed, for example, at regular intervals around the circumference of the collection ring. It can also be preferred in the context of the present invention that the existing central vacuum panel or main vacuum panel is arranged on a first side of the collection ring, while the auxiliary vacuum panels are arranged on a second side or on the opposite side of the collection ring.

[0020] In the context of the present invention, it is preferred that the vacuum panels can be connected to each other via vacuum lines. In the context of the present invention, it is preferred that the additional vacuum panels or auxiliary vacuum panels also have vacuum chambers, which can be formed as voids and / or cavities. Preferably, the vacuum chambers are arranged on the bottom side of the vacuum panel, wherein the bottom side of the vacuum panel rests on the substrate to be processed by the core drilling machine. This allows the vacuum panel to suck itself to the substrate, so that the collection system can be attached to the substrate. The vacuum for attaching the collection system is preferably generated by a vacuum pump as part of a drive unit. The existing drive unit is preferably arranged on a central vacuum panel or a main vacuum panel, and preferably there is a fluid connection between at least one vacuum chamber of the central vacuum panel or the main vacuum panel and the vacuum pump of the drive unit. Through the fluid connection, the vacuum generated by the vacuum pump is transmitted to the vacuum chamber. In the context of the present invention, this preferably means that at least one vacuum chamber of the vacuum panel can be emptied or exhausted via a fluid connection to the vacuum pump. At least one vacuum chamber of the central vacuum panel or the main vacuum panel and / or the vacuum pump of the drive unit of the collection system can be connected to other auxiliary vacuum panels or their vacuum chambers via vacuum lines. This allows the vacuum generated by the vacuum pump of the drive unit to be transferred to the vacuum chamber of the auxiliary vacuum plate. In the context of the invention, this preferably means that the vacuum chamber of the auxiliary vacuum plate can be evacuated or exhausted via the vacuum line. For this purpose, the vacuum is generated by means of the vacuum pump of the drive unit and distributed preferably evenly in the vacuum chambers of the vacuum plates of the functional units by means of the vacuum lines. Due to the preferably even distribution of the vacuum to the different vacuum plates and the associated application of the vacuum at several locations, a particularly good even attachment of the collecting system to the substrate in which the core hole is to be produced can be achieved.

[0021] In addition, providing multiple vacuum panels can advantageously increase the available space for attaching other items to the substrate. For example, the vacuum panels of the proposed collection system can be used to attach tools, auxiliary equipment or other items used on the construction site to the substrate. For example, measurement equipment or laser line equipment can be attached to the vacuum panels. The attachment of tools, auxiliary equipment or other items is particularly useful when the collection system is attached to a vertical wall and the items can then be located at, for example, the working or eye level of the user of the collection system. In addition, the use of multiple vacuum panels can increase the load capacity of the system, especially in the case where a higher number of vacuum panels is accompanied by an increase in the vacuum area.

[0022] It is noted that in the context of the present invention, two different vacuum systems are distinguished from each other. First, a first vacuum generated by a vacuum pump of a drive unit of the collecting system is provided, wherein this first vacuum generated by the vacuum pump is used to attach the vacuum plate or the collecting system or parts thereof to the substrate. The first vacuum can be distributed below the vacuum plate of the collecting system by means of a vacuum line, so that the collecting system can be attached to the substrate in a particularly uniform and effective manner. In addition, in the context of the present invention, a second vacuum generated by a suction device can be provided. With this second vacuum, drilling mud can be extracted from the collecting ring, the second vacuum being transferred from the suction device to the collecting system by means of a suction hose. In the context of the present invention, this preferably means that the suction hose connects the suction device with a functional unit of the collecting system, wherein the suction hose leads into the vacuum plate or is guided through the vacuum plate in such a way that drilling mud can be extracted from the inner space of the collecting ring through the extraction opening. The drilling mud is preferably extracted by means of the second vacuum generated by the suction device, wherein the collecting system can be connected to the suction device as an external auxiliary device. Preferably, the suction device does not constitute part of the proposed collecting system. Preferably, the core drilling machine mentioned above is also not part of the proposed collecting system. Preferably, the proposed collecting system comprises a functional unit with the collecting device and optionally at least one vacuum plate, and a drive unit with a vacuum pump for generating a first vacuum for fastening the system to a substrate and with a power supply.

[0023] By providing two different vacuum systems, the proposed collection system can be attached to the substrate independently of the operation of the suction device. This is not the case in many systems known from the prior art. Instead, conventional systems involve attaching a water or drilling mud collection device to the substrate using the same vacuum that is also used to extract drilling mud. However, this method has several disadvantages. First, the attachment of the collection device to the substrate can only be ensured when the suction device is turned on and running. However, this means that when the suction device is started, the collection device must be constantly removed from the substrate or reattached to the substrate. This is cumbersome and laborious, and therefore expensive. Alternatively, the suction device can be kept open even when it is not in use. However, this method is associated with very high unnecessary energy consumption, which is particularly disadvantageous if the suction device is also a battery-powered suction device. This is because the described method significantly reduces the operating time of the power supply device of the suction device, or significantly shortens the interval between two battery replacement operations. In this respect, a significant advantage of the present invention is that the second vacuum of the suction device is used to extract drilling mud, while the first vacuum for the attached collection system is generated by the vacuum pump of the collection system and thus does not load or shorten the operating time of the power supply device of the suction device. In the context of the present invention, the vacuum chamber of the vacuum panel in which the first vacuum for the attached collection system prevails is referred to as the first vacuum chamber.

[0024] The collecting device (from whose interior space the drilling mud is extracted) may also have at least one vacuum chamber, wherein in the context of the present invention, the at least one vacuum chamber of the collecting device is preferably referred to as a "second vacuum chamber". The second vacuum chamber may be formed, for example, by closing the interior space of the collecting device not only downwardly by the base but also upwardly relative to the environment. For this purpose, the collecting device may, for example, have a covering device that closes the second vacuum chamber upwardly. The covering device preferably has an opening through which a drill bit of a core drilling machine can be guided. If the covering device comprises a compliant elastic material, drill bits of different sizes can be used with the same diameter of the opening and still achieve an acceptable sealing and suction effect of the suction device. The compliant elastic material may, for example, form a sealing disc through which the drill bit is guided when core drilling is ready. Then there is no need to use a different collecting device for each individual drill bit, but the compliant elastic material of which the covering device of the collecting device is at least partially made allows a range of different drill bits to be used with a specific extraction ring. This means that if a user wants to perform several core drilling operations with different diameters, the user does not have to carry so many different collecting devices. Of course, the second vacuum chamber can also be sealed downwardly, i.e. towards the base, by a seal. This prevents air from flowing into or out of the second vacuum chamber from the surroundings of the collecting system, so that the vacuum in the second vacuum chamber can be maintained with less work.

[0025] In the context of the present invention, the second vacuum chamber may also preferably be referred to as an extraction chamber. The terms "top" and "bottom" are not unclear terms for a person skilled in the art, since the terms "bottom" or "bottom side" or the spatial direction "downward" are used in the context of the present invention for the side of the collection system facing the substrate, while the terms "top" or "upper side" or the spatial direction "upward" are used in the context of the present invention for the side of the collection system facing away from the substrate. In this way, these terms are clearly defined not only when the collection system is used on the ground and on a horizontal substrate, but also when the proposed collection system is used on a vertical substrate, such as an outer wall or an inner wall.

[0026] In the context of the present invention, the separation of extraction and attachment is achieved in particular by providing at least two vacuum chambers in the system: a first vacuum chamber, which is formed by the interstices and / or cavities of the vacuum plate and is evacuated by means of a vacuum pump of the drive unit; and a second vacuum chamber, which is formed by the inner space of the collecting device and from which the drilling mud is extracted by means of an external suction device. For this purpose, the collecting device can include a suction channel or a suction nozzle, to which the external suction device can be connected. Preferably, the two vacuum chambers are fluidically separated from each other so that no air can flow from one vacuum chamber to the other, or vice versa. Likewise, drilling mud or water should not be able to enter the first vacuum chamber from the second vacuum chamber, as this would contaminate the first vacuum chamber. This could impair the attachment of the proposed system. The fluid separation of the two vacuum chambers can be further improved by seals or the like.

[0027] The power supply device of the drive unit is preferably provided for supplying power to the drive unit or components of the collection system. In the context of the present invention, it is preferred that the collection system has a vacuum pump. However, it may also be preferred in the context of the present invention that the collection system comprises more than one vacuum pump or also comprises an additional pump. The pump represents an electrical load that draws the power required for its operation from the power supply device of the drive unit. The power supply device may be a rechargeable battery with a plurality of energy storage units. Preferably, the power supply device may also be referred to as a battery pack or a "battery". In the context of the present invention, it is preferred that the power supply device of the drive unit is charged while it remains in the proposed collection system or its drive unit. For this purpose, the power supply device may be connected to a charger or to a public power supply or a construction site power supply. However, it may also be preferred in the context of the present invention that the power supply device for charging is removed from the system and connected to an external charger.

[0028] In addition to the vacuum pump and the power supply, the drive unit may include electronics for controlling the drive unit of the collection system. The electronics of the drive unit may also preferably obtain the energy required for its operation from the power supply of the drive unit of the collection system. In this respect, in the context of the present invention, the electronics of the drive unit preferably also constitute a consumer. For example, the electronics of the system may be used for closed-loop control and / or open-loop control of active components of the system, such as the vacuum pump. For example, the system may include a two-point controller, which may be used to maintain the vacuum in the first vacuum chamber of the vacuum panel within a predetermined pressure range. The proposed open-loop control and closed-loop control of the collection system may include a two-point controller, which is designed to maintain the first vacuum in the vacuum chamber of the vacuum panel between the desired lower limit and the desired upper limit of the vacuum. It is preferred in the context of the present invention that the vacuum pump of the proposed system is turned on or off when these thresholds of the desired pressure range are exceeded or fallen below. Preferably, the vacuum pump is turned on to increase the vacuum, i.e. the difference from the pressure of = 0 bar, while the vacuum continues to decrease when the vacuum pump is turned off. In the context of the present invention, "reduction of vacuum" means an increase in pressure in the form of an absolute value, wherein the difference with the pressure of = 0 bar decreases, while in the context of the present invention, "increase of vacuum" means a decrease in pressure in the form of an absolute value, wherein the difference with the pressure of = 0 bar increases.

[0029] Furthermore, the drive unit may comprise a switching device for switching the collection system or the drive unit on and off. The switch may be a switch, for example a slide switch or a pressure switch. This enables the collection system to be operated independently of the core drilling machine and / or the suction device. For example, the user can prepare the collection system before use of the proposed collection system and before operating the core drilling machine, and can already attach the collection device to the substrate in which the core hole is to be drilled. The suction device for extracting the drilling mud only needs to be switched on afterwards, for example only when core drilling is being carried out, so that the entire core drilling process can be carried out in a time- and energy-optimized manner.

[0030] In the context of the present invention, it is preferred that at least one vacuum panel has a seal. Preferably, the seal of the vacuum panel is arranged on the bottom side of the vacuum panel and is designed to seal at least one vacuum chamber of the vacuum panel. While normal pressure or atmospheric pressure prevails in the environment of the collecting system, the collecting system is attached to the substrate by a vacuum, wherein the vacuum is generated by a vacuum pump of the collecting system and prevails in the at least one vacuum chamber of the vacuum panel in the attached state of the system. In order to prevent air from the environment from flowing into or out of the vacuum chamber of the vacuum panel, a seal can be used to seal the vacuum chamber relative to the environment of the collecting system. Advantageously, the seal helps the collecting system to adhere particularly well even to rough surfaces.

[0031] In the context of the present invention, it is preferred that the seal has a nonlinear sealing profile. When the collection system is connected to the substrate in which the core hole is to be drilled, the vacuum plate is first placed on the substrate, around the drilling location. At this point, the average distance between the vacuum plate and the substrate is, for example, 1. If the vacuum pump of the collection system is now turned on and the vacuum chamber of the vacuum plate is evacuated, the vacuum plate is further sucked and further towards the substrate, and the average distance between the vacuum plate and the substrate decreases, i.e. becomes less than 1. In the context of the present invention, the distance or path over which the distance between the vacuum plate and the substrate becomes smaller can preferably be referred to as the suction path l. In the context of the present invention, it is preferred that the sealing effect or the suction force F changes with increasing suction path, wherein these changes of the sealing effect or the suction force F depend on the suction path l, which is referred to as the sealing profile. In the context of the present invention, it is very particularly preferred that the sealing profile is nonlinear. In the context of the present invention, this preferably means that the sealing effect or the suction force F does not increase linearly with increasing suction path l, but that the sealing effect or the suction force F increases, for example, faster or more strongly with increasing suction path l. In this case, the function of the sealing effect or the suction force F depending on the suction path l can represent, for example, a polynomial function of degree n, an exponential function or a function consisting of different, for example, linear parts (for example, a first part with a first gradient m1 and a second part m2, wherein the second gradient m2 is preferably greater than the first gradient m1). In the context of the present invention, it is preferred that the composite function with linear parts of different gradients itself is called a "non-linear" function.

[0032] A nonlinear sealing profile can be achieved, for example, by not using a conventional sealing ring, but by combining two sealing rings, for example, with different sealing and / or material properties, for example by placing them one above the other. Alternatively, a sealing ring having a non-circular shape or a cut-out area in a profile section can be used. Such a sealing ring can have, for example, a triangular shape in profile, wherein the shape of the sealing ring profile preferably tapers from top to bottom. In addition, two sealing rings with different heights can also be combined with each other, for example by placing these sealing rings close to each other. Preferably, the first sealing ring can have a first height h1 and the second sealing ring can have a second height h2, wherein the first height h1 is greater than the second height h2. When the vacuum chamber of the vacuum panel is evacuated, the higher first sealing ring with the first height h1 then initially contributes to sealing the vacuum chamber. The sealing effect or suction force F is determined by the first sealing ring in this first area, in which only the first sealing ring contributes to the sealing. When the suction increases, the distance between the vacuum panel and the substrate becomes smaller and smaller, so that at a certain point, the lower second sealing ring with the second height h2 also contributes to the sealing. In this second area where both the first sealing ring and the second sealing ring contribute to the seal, the sealing effect or the suction force F is advantageously determined by the two sealing rings. Preferably, the sealing effects of the sealing rings in this second area are added so that the sealing effect or the suction force F in the second area is greater than the sealing effect or the suction force in the first area. This results in a function having a substantially linear first area with a first gradient m1 and a substantially linear second area with a second gradient m2, wherein the second gradient m2 is greater than the first gradient m1 due to the increased sealing effect of the sealing rings. In the context of the present invention, such a function or sealing profile extended in this way is referred to as a "non-linear sealing profile". Preferably, such a non-linear sealing profile can be achieved by a sealing effect or a suction force F that changes nonlinearly during the suction process, for example by changing the stiffness of the sealing material during the extraction process or by using a sealing ring or material with a corresponding customized shape.

[0033] In the context of the present invention, it is preferred that the system has an interface for connecting the drive unit and the functional unit, wherein the interface comprises a line interface for transferring the vacuum from the drive unit to the functional unit. Preferably, the interface can comprise a line interface for transferring the vacuum from the vacuum pump of the drive unit to the vacuum chamber of the functional unit. Preferably, the line interface is designed as a detachable, quickly installable and leakproof fluid line, with which the vacuum generated by the vacuum pump can be transferred from the drive unit to the vacuum panel of the functional unit. In the context of the present invention, it is preferred that the air present in the vacuum chamber of the vacuum panel can be extracted towards the vacuum pump via the line interface.

[0034] In an embodiment also disclosed herein, the functional unit of the collection system can also be used without a drive unit, wherein, in this case, the functional unit side of the line interface can be connected to an external suction device, such as a vacuum cleaner or a wet-dry vacuum cleaner, wherein, in this embodiment, the suction device can be used to evacuate the vacuum chamber of the vacuum panel of the functional unit. It is preferred in the context of the present invention that the line interface is designed to be self-locking on its functional unit side. Thus, even when the drive unit is disassembled, i.e. when the functional unit is used without the drive unit, the vacuum chamber of the vacuum panel of the functional unit is then well sealed relative to the environment.

[0035] In the context of the present invention, it is preferred that the vacuum plate is part of the drive unit. In this embodiment of the present invention, it is preferred that the vacuum plate is not part of the functional unit, but part of the drive unit. In this embodiment of the present invention, the functional unit comprises a collecting device, which is particularly designed as a collecting ring or as a water collecting ring. In this embodiment, the vacuum plate is preferably referred to as a vacuum fixed substrate. In this embodiment of the present invention, the existing vacuum plate is firmly connected to the drive unit, wherein the drive unit can exist, for example, as an independent module arranged on the upper side of the upper side of the preferred plane of the vacuum fixed substrate. Also in this embodiment of the present invention, the drive unit comprises a vacuum pump and a power supply device for supplying power to the vacuum pump. In addition, the drive unit can include a switch for opening and closing and an electronic device. In this embodiment, the fluid line between the drive unit and the vacuum fixed substrate can be a single fluid line, because in this embodiment it is not intended that the vacuum fixed substrate and the drive unit are separated from each other. In particular, the fluid line between the vacuum pump and the vacuum chamber of the vacuum fixed substrate can be designed to be particularly strong and easy to implement technically. The fluid line extracts air from the vacuum chamber of the vacuum fixed substrate towards the vacuum pump and evacuates the vacuum chamber in this way. The vacuum generated in the vacuum chamber causes the vacuum fixed substrate to be sucked against the substrate, thereby fixing the vacuum fixed substrate to the substrate. In an embodiment in which the vacuum fixed substrate is part of a drive unit, the system formed by the collecting device and the drive unit with the vacuum fixed substrate may include a mechanical interface for connecting the vacuum fixed substrate to the collecting device. The mechanical interface is preferably designed so that the drive unit with the vacuum fixed substrate can be connected to collecting devices of different sizes. Preferably, the connection between the collecting device and the vacuum fixed substrate is performed without tools. For example, the water collecting ring can be clamped to the vacuum fixed substrate. In an embodiment of the present invention in which the vacuum fixed substrate is part of the drive unit, the evacuation of at least one vacuum chamber of the vacuum fixed substrate is performed by means of a first vacuum generated by a vacuum pump of the drive unit. The drilling mud is extracted by means of a second vacuum generated by an external suction device (such as a vacuum cleaner or a wet-dry vacuum cleaner). The collecting device or the water collecting ring may have a suction nozzle for attaching a suction hose, or may have other devices for connecting a suction hose of the suction device.

[0036] Furthermore, in this embodiment of the invention, the vacuum-mounted substrate may be formed in several parts. Furthermore, the vacuum-mounted substrate as part of the drive unit may also have a seal relative to the base, wherein the seal has a non-linear sealing profile.

[0037] Additional advantages will become apparent from the following description of the drawings. The drawings, the specification and the claims contain many combined features. Those skilled in the art will also readily consider these features individually and combine them to form reasonable further combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In the figures, identical and functionally identical components are denoted by the same reference symbols.

[0039] In the attached picture:

[0040] Figure 1 A view showing a preferred embodiment of a collection system with a functional unit and a drive unit in a connected state;

[0041] Figure 2 A view showing a preferred embodiment of a collection system with a functional unit and a drive unit in a separated state;

[0042] Figure 3 A schematic top view of a preferred embodiment of a collection system is shown;

[0043] Figure 4 shows a schematic side view of a preferred embodiment of a collection system;

[0044] Figure 5 shows a schematic top view of a preferred embodiment of a collection system having several vacuum panels;

[0045] Figure 6 Schematic representations of different non-linear sealing profiles are shown;

[0046] Figure 7 A top view of a preferred embodiment of the collection system is shown, wherein the vacuum plate is part of the drive unit. DETAILED DESCRIPTION

[0047] Figure 1 A preferred embodiment of a collection system 10 is shown with a functional unit 20 and a drive unit 30 in a connected state. Figure 1 In the exemplary embodiment of the invention shown in FIG. 1 , the functional unit 20 comprises a water collecting ring 20 as a collecting device 20 and a vacuum plate 40, with which the collecting system can be attached to a substrate U. The substrate U can be processed by a core drilling machine 100 in the sense that core holes are drilled into the substrate U. For this purpose, the core drilling machine 100 may include a Figure 1is shown as representing a drill bit of the core drilling machine 100. When the core drilling operation is performed, drilling mud B is generated as a mixture of cooling water or flushing water, dust, and drilled material. The drilling mud B is collected in the internal space 26 of the collecting device 22. The internal space 26 of the collecting device 22 can be connected to an external suction device 80 via a suction nozzle 84 and a suction hose 82, so that the drilling mud B can be extracted from the internal space 26 of the collecting device 22 by vacuum. This means that the internal space 26 of the collecting device 22 can be subjected to the vacuum generated by the suction device 80. As a result, the internal space 26 of the collecting device 22 becomes a vacuum chamber, which in the context of the present invention is referred to as the second vacuum chamber 26. Possible paths for the drilling mud B are in Figure 1 Indicated by arrows in the figure. The inner space 26 of the collecting device 22 can be closed by means of a covering device 28 to form a vacuum chamber 26. The inner space 26 of the collecting device 22 can therefore be closed downwardly by the substrate U itself, i.e. in the direction of the substrate U, wherein the seal 24 contributes to a particularly effective sealing of the vacuum chamber 26. In the spatial direction "upwards", i.e. on the side of the collecting device 22 facing away from the substrate U, a covering device 28 is preferably provided. The covering device 28 can comprise, for example, a compliant elastic material, which can form, for example, a sealing disk. The covering device 28 can have an opening through which a drill bit of the core drilling machine 100 can be guided in order to perform core drilling, the opening being surrounded by the collecting device 22.

[0048] exist Figure 1 In the embodiment of the present invention shown in , the vacuum plate 40 is part of the functional device 20. The vacuum plate 40 also has a vacuum chamber 46, wherein in the context of the present invention, the vacuum chamber 46 of the vacuum plate 40 is referred to as a first vacuum chamber 46. The first vacuum chamber 46 can be subjected to a vacuum that can be generated by the vacuum pump 32 of the drive unit 30 of the collection system 10. Figure 1 In the exemplary embodiment of the present invention shown in FIG. 1 , the functional unit 20 and the drive unit 30 of the system 10 represent separate units 20, 30, wherein these units 20, 30 are connected to each other in a Figure 1 are connected to each other and Figure 2 This separation allows, for example, the use of the drive unit 30 in combination with different functional units 20, wherein the functional units 20 differ, for example, in the diameter of the collecting ring 22. In this way, the collecting system 10 can be adapted in a particularly simple and user-friendly manner to the core drilling machine 100 and drill bits with different diameters.

[0049] The vacuum plate 40 can be sealed with respect to the substrate U using a seal 44, while the collecting device 22 can be sealed with respect to the substrate using a seal 24. The seal can also be arranged in the transition area between the vacuum plate 40 and the collecting device 22, and is referred to as "seal 24, 44" in the context of the present invention. The seals 24, 44 ensure that there is no exchange of air or drilling mud between the first vacuum chamber 46 of the vacuum plate 40 and the second vacuum chamber 24 of the collecting device 22. In other words, the seals 24, 44 seal the vacuum chambers 26, 46 with respect to each other. The seal 24 seals the second vacuum chamber 26 of the collecting device 22 with respect to the ambient pressure or atmospheric pressure in the environment of the collecting system 10, while the seal 44 seals the first vacuum chamber 46 of the vacuum plate 40 with respect to the ambient pressure or atmospheric pressure in the environment of the collecting system 10. The first vacuum in the first vacuum chamber 46 is used to attach the system 10 to the substrate U, while the second vacuum in the second vacuum chamber 26 is used to evacuate the drilling mud B from the inner space 26 of the collecting device 22. The first vacuum may be generated by the vacuum pump 32 of the drive unit 30, and the second vacuum may be generated by the external suction device 80. The seal 24, 44 may have a non-linear sealing profile, so that an improved sealing effect of the seal 24, 44 may be achieved.

[0050] In addition to the vacuum pump 32, the drive unit 30 of the collection system 10 includes a power supply 34 for supplying power to the vacuum pump 32. Wires 37 can be routed within the drive unit 30 and, for example, connect the power supply 34, the vacuum pump 32, the switch 36, and / or the electronic device 38 of the drive unit 30 to each other in an electrically conductive manner. The switch 36 can be used to turn on or off the system 10 or the drive unit 30 and its components (e.g., the vacuum pump 32). The electronic device 38 of the drive unit 30 can be used for closed-loop control and / or open-loop control of the drive unit 30 and / or the vacuum pump 32. For example, the operation of the vacuum pump 32 can be controlled to ensure that the vacuum in the first vacuum chamber 46 of the vacuum panel 40 is always maintained within the desired pressure range. This can ensure that the vacuum panel 40 and the water collecting ring 22 connected to the vacuum panel 40 are always firmly attached to the substrate U. The power supply 34 is preferably a rechargeable battery with multiple energy storage units. The power supply 34 may be in the form of a battery pack (“battery”) that may be recharged with electricity in the drive unit 30 or in an external charger (not shown).

[0051] The fluid line 33 may be present between the vacuum pump 32 and the first vacuum chamber 46 of the vacuum panel 40 and may include a line interface 52. The line interface 52 may be part of a mechanical interface 50 for connecting the functional unit 20 to the drive unit 30. The interface 50 allows easy separation of the drive unit 30 from the functional unit 20 without tools, while the line interface 52 allows easy separation of the fluid line 33. The line interface 52 may be self-locking on the vacuum panel 40 side and / or the drive unit 30 side, so that the fluid line 33 is sealed when the units 20, 30 are separated.

[0052] Figure 2 A preferred embodiment of a collecting system 10 is shown with the functional unit 20 and the drive unit 30 in a separated state.

[0053] Figure 3 A schematic top view of a preferred embodiment of a collecting system 10 is shown. A functional unit 20 with a collecting device 22 and a drive unit 30 is shown. The collecting device 22 can be annular, so that an inner space 26 is formed. When core drilling is carried out, drilling mud B collects in this inner space 26 and can be extracted via the extraction opening 23 of the collecting device 22 by means of a suction device 80. For this purpose, the collecting device 22 can be connected to the suction device 80 via a suction hose 82. The suction device 80 is designed to generate a vacuum for extracting the drilling mud B, wherein the inner space 26 of the collecting device 22 is subjected to the vacuum and thus serves as an extraction chamber or vacuum chamber 26. The inner space 26 of the collecting device 22 can be covered at the top by a covering device 28 (see Figure 1 and Figure 2 ). The interior space 26 of the collecting device 22 is closed downwardly by the substrate U in which the core hole is to be produced. The suction hose 82 can be extended through the functional unit 20 until it opens into the interior space 26 of the collecting device 22 in the region of the extraction opening 23. This extension of the suction hose 82 inside the functional unit 20 is Figures 3 to 5 Shown by dotted lines.

[0054] The drive unit 30 of the collection system 10 may include electronics 38 for closed-loop control and / or open-loop control of components of the drive unit 30. For example, the vacuum pump 32 and / or the power supply 34 or their respective operations may be subject to open-loop control and / or closed-loop control by the electronics 38 of the drive unit 30. Figure 3 In the embodiment of the collection system 10 shown in FIG. 1 , the vacuum panel 40 is part of the functional unit 20 . Figure 3 In the exemplary embodiment of the invention shown in FIG. 1 , the vacuum panel 40 is formed in one piece, wherein Figure 3 The one vacuum panel 40 of the exemplary embodiment of the present invention shown in is preferably referred to as a central vacuum panel or main vacuum panel 40 .

[0055] Figure 4 A preferred embodiment of the collection system 10 is shown (particularly Figure 3 1 . In particular, a possible arrangement of the drive unit 30 of the system 10 on the functional unit 20 is shown. For example, the drive unit 30 can be arranged on the upper side of the functional unit 20 or on the upper side of the vacuum plate 40 of the functional unit 20. Figure 4 In the figure, the inner space 26 of the collecting device 22 and the extension of the suction hose 82 inside the functional unit 20 are indicated by dashed lines, because they are not visible from the outside in the side view. The drive unit 30 and the functional unit 20 can be connected to each other by means of an interface 50, wherein the interface 50 is preferably a mechanical interface. The interface 50 may include a pipeline interface 52, which is designed to connect the fluid pipeline 33 on the side of the drive unit 30 and the side of the vacuum plate 40 of the functional unit 20 to each other, or in a separated state, the fluid pipeline 33 on the side of the drive unit 30 and the side of the functional unit 20 is tightly sealed.

[0056] Figure 5 A schematic top view of a preferred embodiment of a collection system 10 having a plurality of vacuum panels 40, 48 is shown. Figure 5 In the exemplary embodiment of the invention shown in FIG. 4 , the vacuum panels 40 , 48 are part of the functional unit 20 . The functional unit 20 comprises a main vacuum panel 40 , on which, for example, the drive unit 30 can be arranged. In addition, Figure 5 The exemplary embodiment of the collection system 10 shown in FIG. 4 comprises further vacuum panels 48 which can be arranged, for example, on the opposite side of the functional unit 20 of the collection system 10 . As a result, Figure 5 The vacuum panels 40, 48 of the exemplary embodiment of the collection system 10 shown in FIG. 1 have a multi-part design, namely, Figure 5 The collection system 10 shown in FIG. 1 has a plurality of vacuum panels 40, 48, wherein Figure 5 The collecting system 10 shown in FIG. 1 has in particular a central vacuum plate or main vacuum plate 40 and two further vacuum plates 48. The further vacuum plates 48 also have vacuum chambers 46 which can be evacuated by means of the vacuum pump 32 of the drive unit 30. The vacuum plates 40, 48 can be connected to each other and / or to the vacuum pump 32 of the drive unit 30 via vacuum lines 42. The vacuum chambers 46 of the vacuum plates 40, 48 can be evacuated or subjected to vacuum via the vacuum lines 42. In this way, the collecting system 10 can be attached to the substrate U.

[0057] In order to extract drilling mud B from the interior space 26 of the collecting device 22, the collecting system 10 can be connected to an external suction device 80, wherein a suction hose 82 can be used for this connection. The functional unit 20 or the collecting device 22 can have a suction nozzle 84 (see Figure 1 and Figure 2 ), on which a suction hose 82 can be mounted. The vacuum for extracting the drilling mud B can be brought into the region of the extraction opening 23 of the collecting device 22 via the suction hose 82 and a possible extension of the suction hose 82 through the functional unit 20, so that the drilling mud B can be extracted from the interior space 26 of the collecting device 22 through the extraction opening 23.

[0058] Figure 6 Schematic representations of various nonlinear sealing profiles are shown. Figure 6 On the left half of FIG. , a cross section through a schematic exemplary sealing arrangement is shown. Figure 6 The right half of shows the associated sealing profile, wherein the sealing effect or suction force F is plotted in each case relative to the suction path l. In the context of the present invention, the suction path l is preferably a path in which the distance between the vacuum plate and the substrate decreases when the vacuum pump 32 of the collection system 10 is turned on and the vacuum chamber 46 of the vacuum plate 40 is evacuated. This is because by applying a vacuum to the vacuum chamber 46 of the vacuum plate 40, the vacuum plate 40 is sucked towards the substrate U and thereby attached to the substrate U. Figure 6 In the upper right quarter of FIG. 1 , a sealing profile F(l) having, for example, an exponential or quadratic course is shown. The sealing effect and the suction force F increase first slowly and then more and more rapidly as the suction path increases. Such a course of the sealing profile can be achieved, for example, with a gradually tapering sealing arrangement (schematically: a triangular cross-sectional profile of the sealing arrangement) or by two sealing rings placed one above the other, wherein the sealing rings can, for example, consist of different materials or can have different material compositions.

[0059] exist Figure 6 In the lower right quarter of , a sealing profile F(l) is shown which consists of two essentially linear parts with different gradients m. The gradient m2 of the larger suction path l is greater than or higher than the gradient m1 of the smaller or shorter suction path l. The sealing effect and the suction force F first increase slowly with a gradient m1 and then increase from the inflection point with a gradient m2, wherein m2>m1. Such a course of the sealing profile can be achieved, for example, with a sealing arrangement consisting of two sealing rings placed close to each other, wherein the sealing rings can have different heights h1 and h2. However, in the case of the smaller suction path l, initially only the first sealing ring with the height h1 contributes to the sealing effect, starting from the inflection point, both sealing rings contribute to the sealing effect, so that the sealing effects of the individual sealing rings are added and therefore the sealing effect increases faster from the inflection point. Figure 6In the example shown at the bottom of the , the height h1 of the first sealing ring is greater than the height h2 of the second sealing ring. It has been shown that by using a sealing arrangement with a nonlinear sealing profile, a particularly effectively sealed vacuum chamber 46 can be obtained, making it possible to make a particularly stable, strong and secure attachment of the collection system 10 to the substrate U to be processed.

[0060] Figure 7 A schematic side view of a preferred embodiment of a collection system 10 is shown, in which the vacuum plate 40 is part of the drive unit 30. In this embodiment of the invention, the collection device 22 of the system 10 can be kept particularly simple. The water collecting ring 22 can be covered by a covering device 28 and sealed relative to the base U and / or the vacuum chamber 46 of the vacuum plate 40 by a water collecting seal 24. The water collecting ring 22 can be connected to an external suction device 80 via a suction nozzle 84 and a suction hose 82, so that the drilling mud B generated during the execution of the core drilling operation can be extracted from the inner space 26 of the water collecting ring 22. The water collecting ring 22 can be formed by means of an interface 60 to the drive unit 30, in particular the vacuum plate 40 of the drive unit 30, so as to form the collection system 10. In this exemplary embodiment of the invention, the vacuum plate 40 of the drive unit 30 can preferably be referred to as a vacuum fixed base plate 40. The vacuum fixed base plate 40 can be sealed relative to the base U by a seal 44, and its vacuum chamber 46 can be subjected to the vacuum from the vacuum pump 32 of the drive unit 30. As a result, the vacuum fixing base plate 40 adheres to the substrate U, and the collection system 10 can be fixed to the substrate U in this way. In addition to the vacuum pump 32, the drive unit 30 of the system 10 also includes a power supply 34, and optionally includes an on / off switch 36 and / or an electronic device 38 for open-loop control and / or closed-loop control of the collection system 10 or its active components (such as the vacuum pump 32 or the power supply 34). The electrical components of the drive unit 30 (such as the power supply 34, the switch 36, the vacuum pump 32 or the electronic device 38) can be conductively connected to each other via electrical wires 37. The vacuum pump 32 and the vacuum chamber 46 of the vacuum plate 40 can be fluidly connected to each other via a fluid line 33.

[0061] List of Reference Numerals

[0062] 10 Collection System

[0063] 20 functional units

[0064] 22 Collection device

[0065] 23 Extraction opening

[0066] 24 Collection device seal

[0067] 26. Second vacuum chamber of the collection device

[0068] 28 Covering device

[0069] 30 Drivers

[0070] 32 Vacuum pump

[0071] 33 Fluid pipeline

[0072] 34 Power supply device

[0073] 36 Switching device

[0074] 37 Wire

[0075] 38 Electronic devices

[0076] 40 Vacuum Plate

[0077] 42 Vacuum lines

[0078] 44 Vacuum plate seal

[0079] 46 Vacuum plate first vacuum chamber

[0080] 48 Additional vacuum panels

[0081] 50 Interface between functional unit and drive unit

[0082] 52 Pipeline interface

[0083] 60 Interface between the collection device and the vacuum plate

[0084] 80 Suction device

[0085] 82 Suction hose

[0086] 84 Suction nozzle on the collection unit

[0087] 100 Core drilling machines, especially drill bits

[0088] B Drilling Mud U Base

Claims

1. A system (10) for collecting drilling mud (B) produced during operation of a core drilling machine (100), It is characterized in that The system (10) comprises a collecting device (22) as a functional unit (20), wherein the collecting device (22) can be attached to a substrate (U) by means of a vacuum, wherein the vacuum can be generated by a vacuum pump (32) as part of a drive unit (30) of the system (10), wherein the drive unit (30) additionally comprises a power supply device (34) for supplying electrical power to the drive unit (30).

2. The system (10) as claimed in claim 1, It is characterized in that The drive unit (30) is detachably attached to the functional unit (20).

3. The system (10) according to claim 1 or 2, It is characterized in that The functional unit (20) comprises at least one vacuum plate (40) for transmitting the vacuum to the substrate (U).

4. The system (10) as claimed in claim 3, It is characterized in that The system (10) comprises an interface (50) for connecting the drive unit (30) and the functional unit (20), wherein the interface (50) comprises a pipeline interface (52) for transmitting the vacuum from the drive unit (30) to the functional unit (20).

5. The system (10) as claimed in any one of claims 1 and 2, It is characterized in that The system (10) comprises at least one vacuum plate (40) for transmitting the vacuum to the substrate, wherein the vacuum plate (40) is part of the drive unit (30).

6. The system (10) according to any one of the preceding claims 3 to 5, It is characterized in that The vacuum panel (40) is made of several parts.

7. The system (10) as claimed in claim 6, It is characterized in that The vacuum panels (40) can be connected to each other and / or to the vacuum pump (32) via vacuum lines (42).

8. The system (10) as claimed in one of the preceding claims, It is characterized in that The at least one vacuum panel (40) has a seal (44).

9. The system (10) as claimed in claim 8, It is characterized in that The seal (24, 44) has a non-linear sealing profile.

Images