Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L9/00—Supporting devices; Holding devices
  • B01L9/02—Laboratory benches or tables; Fittings therefor

Definitions

• the invention relates to a laboratory device according to the preamble of patent claim 1.
• Such a laboratory device is used, for example, to operate a preparative high-pressure liquid chromatography (HPLC) system in which, for example, flow rates of up to 100 ml / min and more usually occur in the research laboratory.
• HPLC high-pressure liquid chromatography
• the liquids used are usually volatile organic solvents which can be toxic and explosive.
• a laboratory device which has three connected service towers, wherein at least one movable table extends adjacent to a side edge of the towers connecting substructure.
• a device for the disposal of liquid waste at a laboratory workstation comprises a receptacle associated with the laboratory workstation and / or laboratory bench and having an inlet for the waste, a suction port and a venting port. Furthermore, this device has arranged on a carriage collecting container.
• a laboratory table which is designed to be mobile and has a work surface and a storage space. Furthermore, a supply device is provided in this device, which is housed in the storage space of the laboratory table.
• a laboratory device according to the preamble of claim 1 is known for example from US 3,041,957.
• the work surface has a basin-like drain, which is connected to a waste container.
• the waste container is housed in a cabinet-like substructure of the mobile, designed as a car laboratory table.
• the invention has for its object to provide a laboratory device of the type mentioned, which is safer to handle.
• the at least one working surface of the laboratory device according to the invention has a plurality of drainage grooves provided on its surface, which are connected to the at least one drain.
• any leaking solvent can not spread over the entire work surface, but only to the next drainage channel.
• the safety of the laboratory equipment according to the invention is considerably increased, since the outflowing or overflowing solvent is partly very volatile and toxic. If the solvent could spread over a larger area, more solvent would evaporate. However, because it flows into the grooves, it can only spread over a relatively limited area of the work surface.
• the drainage channels are designed and arranged distributed over the surface in such a way that a segment-like division results for the at least one working surface, wherein the drainage grooves are preferably also provided on the edge of the at least one working surface.
• the drainage grooves are preferably also provided on the edge of the at least one working surface.
• the at least one drain is located approximately in the middle of the at least one working surface, wherein a drain preferably made of Teflon drain pipe is connected to the at least one drain, which preferably below the at least one working surface to the rear, then vertically downwards and led to a waste container.
• the outflowing liquid which, as mentioned above, in the applications mainly of interest here is usually an organic solvent, therefore passes quickly through the drainage channels and the at least one drain into a closed space, so that as little solvent as possible flows into the atmospheric environment of the laboratory device g can manage. It is possible to use the storage space underneath the work surface by moving it backwards and then vertically downwards. As a result, the laboratory device according to the invention can additionally be designed to be extremely compact.
• drains per work surface are preferably each about in the middle and at the rear edge of the work surface.
• internal drainage holes lead the solvent running in the horizontal direction to the rear.
• the outflows to these drainage holes are preferably located at the intersection points of the drainage grooves with the drainage holes in the at least one working surface.
• the bores are drilled with a common rail passing from an ornate plastic, such as plastic. Teflon, which is connected via a vertically downwardly extending drain line to the waste container.
• the drainage channels are inclined towards the at least one outlet. As a result, the liquid present in the drainage channels does not have a shorter residence time, so that only little time is available for evaporating the liquid. Rather, the liquid flows off quickly and can be collected in the aforementioned waste container.
• a ventilated laboratory cabinet for liquid containers preferably solvent containers
• the laboratory cabinet is preferably made of non-combustible material and has a grounded ground made of stainless steel.
• This is also another source of solvent vapors, namely the area in which, for example, the waste container is located ventilated, i. connected to an exhaust air system.
• This refinement thus also improves the safety of the laboratory equipment according to the invention, since explosive vapors or gases are less easily formed in the stated range. Analogous versions also apply to toxic gases or vapors.
• a discharge hood is provided on the at least one working surface. This makes it possible to connect another source of solvent vapors to the exhaust air system. It is clear that the exhaust ducts of the aforementioned laboratory cabinet or the cabinets for solvent containers can be merged with those of the exhaust hood, so that ultimately only one exhaust system with multiple branches is required.
• a safety device which triggers an alarm in the case of a liquid flowing out through the drainage grooves.
• the liquid may in particular be an organic solvent.
• the triggering of an alarm can interrupt, for example, the entire power supply of the laboratory device, so that thereby possibly a threatening uncontrolled L ösungsschaustritt v prevented i st. It is also possible to operate completely automatically with the laboratory equipment in question. This is therefore a leak-proof platform on which systems can work in a state without human supervision, since the monitoring is performed electronically, for example, automatically. With this development, it is thus achieved that larger amounts of, for example, explosive solvents In the first place, vapor vapors can not form or accumulate, since the evaporation of larger amounts is already prevented.
• the at least one work surface is part of a mobile laboratory cart, which preferably has an upper and a lower work surface and a lower floor in the form of, for example, a low-lying support structure for receiving the laboratory cabinet.
• a laboratory device is therefore extremely mobile and accessible from all sides. It can improve occupational safety where this is necessary in the case of locally changing workplaces.
• the subfloor in the form of a special, low-lying supporting structure for accommodating one or more cabinets for solvent containers, it is arranged as close to the floor as possible, so that these containers are generally not completely lifted, but merely tilted. to then be pushed into the cabinet structure.
• the accessibility of the liquid - in particular solvent container is improved and their handling easier.
• the at least one working surface is composed of a plurality of advantageously three partial surfaces, each partial surface preferably having at least one outflow and a plurality of drainage grooves.
• the parts of a work surface can thus be more easily transported to the construction site of the laboratory cart.
• Fig. 1 is a schematic, front perspective view of a laboratory device
• Fig. 2 is a schematic front view of a part of the laboratory equipment
• Fig. 3 is a schematic plan view of a part of the laboratory device
• Fig. 4 is a schematic plan view of a working surface of the laboratory device; and 5 shows a schematic section along the line VV in Fig. 4th
• Fig. 1 is a schematic front view of a laboratory device 1 is shown schematically.
• the laboratory device 1 has at least one working surface 3 having at least one drain 2.
• the at least one working surface 3 is part of a mobile laboratory cart 4, which has an upper working surface 3 and a lower working surface 5 arranged underneath Underbody 6 has in the form of a low-lying support structure.
• each sub-surface 27 may have one or more outflows 2 and a surrounding drainage groove 10, so that no solvent can fall beyond a partial area addition.
• An embodiment with three partial surfaces 27 is shown schematically in FIG. 4, wherein each partial surface 27 has four segment-like subdivisions 11.
• detectors such as e.g. Mass spectrometer or UV spectrometer, as well as chromatography columns or a discharge hood 7, as shown in Fig. 1, be positioned below which sampler or fraction collector can be arranged.
• lower working surface 5 is insofar a second device level, in which preferably pumps or flat components of the system, such as a safety device 22 explained below, can be accommodated.
• the at least one working surface 3 has a plurality of drainage grooves 9, 10 provided on its surface 8, which are connected to the at least one drain 2.
• the drainage grooves 9 run transversely to the longitudinal axis of the laboratory cart 4, while the drainage grooves 10 extend according to FIG. 3 in the longitudinal direction of the laboratory cart. The latter are omitted in Fig. 1 for the sake of clarity.
• FIG. 1 shows a schematic plan view of the laboratory device 1
• the drainage grooves 9, 10 are designed and arranged distributed over the surface 8 such that for the work surfaces 3, 5 each results in a previously mentioned in the sub-areas 27 segmental subdivision 11.
• the drainage grooves 9, 10 are also provided on the edge 26 of each work surface 3, 5, as can be seen from FIG. 3; Here they form a groove enclosing the respective working area.
• the drains 2 are according to a first embodiment in the middle or approximately in the middle of each working surface 3, 5 and are indicated in Fig. 1 only schematically.
• a drain line 12 (see FIG. 2) is connected, which is preferably made of Teflon.
• Each drain line 12 is guided below the respective working surface 3, 5 to the rear, then vertically downwards and to a in Fig. 2 schematically indicated waste container 13.
• FIG. 2 shows a schematic, partial front view of the laboratory device 1.
• the at least one working surface 3, 5 has a plurality of outflows 2, which are preferably arranged in each outflow groove 9 running transversely to the longitudinal axis of the at least one working surface 3, 5 and in the rearmost flow-off groove 10.
• the at least one working surface in its interior preferably has a plurality of drain holes 28 extending horizontally to the rear, connected to the at least one drain 2 of a drainage groove 9, 10.
• These drainage bores 28 are horizontal in the working surface 3, 5 and extend horizontally to the rear the drain or drains 2 at or near intersection points 29 of the respective drainage bore 28 with the drainage grooves 9 preferably approximately in the middle and the rearmost drainage groove 10.
• only one drainage bore 28 is schematically indicated in FIG.
• the drainage holes 28 are connected internally to the edge 30 of the working surface with a horizontally extending collecting line (not shown), which is connected to the waste container via a discharge conduit (see FIG. All lines are preferably made of Teflon.
• FIG. 5 A section along the line VV in Fig. 4 is shown schematically in Fig. 5. This figure illustrates that the drainage hole 28 embedded in the respective working surface 3, 5 and extends within this.
• the drainage hole 28 is connected via outlets 2 with the drainage grooves 9, 10 in connection.
• an angular connection piece 31 is provided and screwed into the drainage hole 28, for example.
• the free end of this connection piece 31 is connected to the not shown s ummeltechnisch and ie in FIG. 2 d arachi drain line 12 connected.
• each connector 31 is located in a recess 32 at the rear edge 30 of the respective working surface 3, 5.
• each connector 31 is housed well protected. It is clear that each work surface 3, 5 and also each partial surface 27 of the relevant work surface can have one or more internal drainage holes 28.
• the drainage grooves 9, 10 are inclined to the respective outflow 2 and approximately horizontally draining drain lines 12 to the waste container 13. This can be done, for example, by the fact that the plate of the working surface is slightly bulged apart from its surface 8, wherein at the hole for the drain 2 is the lowest point. It is also possible that the entire surface 8 of the respective working surface 3, 5 including the drainage groove 9, 10 is slightly inclined to the respective outflow 2. It is also possible that the drainage channels are formed deeper becoming drain points.
• Each work surface 3, 5 may for example be a polypropylene plate.
• one of the liquid containers 15 is the aforementioned waste container 13.
• the laboratory cabinet 14 is made of non-combustible material and has a grounded bottom 16 made of stainless steel sheet. This reduces the risk of electrostatic charging.
• the laboratory cabinet 14 has two front-opening doors 17, 18 on, wherein the right door 18 is lockable with a lock 19.
• further storage space is available on the subfloor 6 in the form of the low-lying support structure, in which case, for example, another cabinet for receiving liquid containers can be mounted.
• the exhaust hood 7 is provided on the left half of the upper work surface 3, which can be provided via a feed opening 20 with the various sample and fraction carriers.
• the extraction hood can also have an upwardly slidable front window.
• a sliding door 21 is provided which also allows access to the inside of the extraction hood.
• the laboratory device 1 may contain the previously mentioned safety device 22, which is indicated only by dashed lines in FIG. 1.
• the safety device is designed such that it triggers an alarm in the case of a liquid flowing out through the drainage grooves 9, 10.
• the safety device 22 can interrupt, for example, the entire power supply of the laboratory device 1 and thus prevent further liquid from flowing out and through the drainage channels 9, 10 and the drain lines 12.
• the laboratory cart 4 has ultimately three levels, namely the upper working surface 3, including the lower working surface 5 and finally including the below the upper edges of the wheels 23 arranged subfloor 6 in the form of low-lying support structure for ventilated laboratory cabinets.
• the support structure is open towards the front, so that the or the laboratory cabinets 14 tilted slightly forward with its trailing edge placed on the support structure and then can be pushed into the support structure without complete lifting into it.
• Equivalent embodiments for the liquid container 1 5 are based on the respective laboratory cabinet 14 arranged on the underbody 6.
• the two working surfaces 3, 5 are also at their edge 26 with the inventive drainage grooves 9 , 10 provided.
• the laboratory device 1 is only partly shown in comparison to the embodiment shown in FIG.
• the cabinet 14 and the hood 7 are omitted, for example.
• the drain lines 12 each extend from the drain 2 through each work surface 3, 5, as mentioned, first below the respective working surface to the rear and then down and finally open via a common line 24 in the liquid container 15, which here designed as a waste container 13 is.
• a common line 24 in the liquid container 15 which here designed as a waste container 13 is.
• the working surface drain lines 12 instead of the downwardly extending below the respective working surface drain lines 12, as described above, in the working surface drilled drainage holes 28 are present, which open into a running at the rear edge 30 of the working surface manifold, which connected via a downwardly leading drain line 12 to the waste container is.
• the exhaust hood 7 is indicated only by dashed lines.
• the drain grooves 9 and 10 extend around the individual segment-like subdivisions 11.
• the drain 2 is located at an intersection of the drain grooves 9 and 10. It is clear that several drains can also be provided on each work surface.
• the drainage grooves 9 and 10 and the segmental subdivisions 11 are also located in the region and in particular below the extraction hood 7, as indicated in phantom in FIG. 3, so that the safety device 22 (see FIG. 1) can also respond if a liquid in the region of the discharge hood 7 flows into one of the drainage grooves 9 or 10 and from there to the drain and via the drain lines 12 to the waste container 13 passes.
• Fig. 3 can also be seen that are on the rear side of the work surface designed as a table top recesses 25, for example, for cables and wires.
• a liquid flowing out on one of the work surfaces 3, 5 can propagate only on the surface of a single segment-like partition 11, since it flows at the edge of each partition into one or more of the drainage grooves 9, 10.
• the liquid then flows via the drainage channels to the at least one drain 2 and from there, as mentioned, via drainage bores 28 and / or drainage lines 12 into the waste container 13.
• a liquid flowing out of the working surfaces can not be uncontrolled. spread, whereby the risk of formation of solvent vapors and / or explosive mixtures is greatly reduced.

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• Health & Medical Sciences (AREA)
• Clinical Laboratory Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Devices For Use In Laboratory Experiments (AREA)
• Knives (AREA)
• Stringed Musical Instruments (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Water Treatment By Sorption (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (5)

Family Cites Families (13)

• 2003
  • 2003-03-26 CH CH00522/03A patent/CH696232A5/de not_active IP Right Cessation
• 2004
  • 2004-03-16 AT AT04720836T patent/ATE347445T1/de not_active IP Right Cessation
  • 2004-03-16 EP EP04720836A patent/EP1603675B1/fr not_active Expired - Lifetime
  • 2004-03-16 DE DE502004002235T patent/DE502004002235D1/de not_active Expired - Fee Related
  • 2004-03-16 WO PCT/CH2004/000154 patent/WO2004085066A1/fr active IP Right Grant
  • 2004-03-16 US US10/549,244 patent/US20060150317A1/en not_active Abandoned

Non-Patent Citations (1)

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