JP4203309B2 - Experimental bench - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an experimental bench that handles solutions and the like, and more particularly, to an experimental bench that can efficiently handle harmful waste liquids generated by experiments in university experimental laboratories, public offices, private research / analysis / inspection laboratories and the like.
[0002]
[Prior art]
In an experimental bench set up in an experimental laboratory, an examination room, or the like, various experimental instruments are set on the bench, and sample pretreatment, mixing, weighing, and experiments are performed. FIG. 3 shows a general-purpose laboratory table 30 that has been conventionally used. FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a side view. The experimental table 30 is a central experimental table for a rectangular research experiment that can be operated from both sides. It is assembled with a painted steel square pipe frame or double-sided decorative board, and a top plate 33 made of a ceramic plate, synthetic resin, stainless steel or the like is used on the upper surface of the work. A storage box is provided in which the door 35 can be opened to store laboratory instruments and the like, and a drawer 36 that can store reagents, samples, and the like is provided on both sides of the lower part. Furthermore, an electrical outlet is provided on the top surface of the top plate 33 or the side surface of the experimental table 30 in order to perform an experiment with the experimental instrument placed on the top plate 33 (see, for example, Non-Patent Document 1).
The experimental table 30 includes a stainless steel sink 31 and a drain pipe 34 and a tap faucet 32 used for sample processing, if necessary, and a local exhaust device such as an exhaust hood for exhausting harmful gases generated during the experiment and processing. A ceramic top plate 33 for chemical treatment and high-temperature experiments, a pure water production device storage unit, and the like are required for the experimental bench 30 and are installed according to the purpose.
[0003]
The waste liquid generated during the work performed on the experimental table 30 and the cleaning of the experimental instruments and instruments are performed on a sink 31 attached to the experimental table 30.
The conventional experimental table 30 is generally a fixed type in which a sink 31 is disposed at the end or center of the top plate 33. For this reason, there is an advantage that cleaning of various devices etc. can be performed near the experimental place, but depending on the content of the experiment, if it is not necessary to always wash or add water during the experiment, the area used on the surface of the experimental bench 30 is reduced. Sometimes it is necessary to use it widely. On the other hand, there is a type in which the sink 31 adjacent to the top plate 33 is tilted, the upper part of the sink 31 is covered with a cover plate, and the sink 31 can be used as the experimental table 30 when the sink 31 is not used (for example, Patent Documents). 1).
[0004]
In general, if the waste liquid generated in the experiment is not harmful, it is directly flowed to the sink 31 after the experiment, or is sucked by using the water flow aspirator 44 shown in FIG. 46. In this method, when tap water from a tap faucet 43 is flowed to a water flow aspirator 44, waste liquid is introduced into the water flow aspirator 44 from a capillary (capillary pipe) 40 through a glass pipette 41 and a flexible tube 42. It is sucked in by a viscous flow from the formed nozzle, and a suction pressure of up to about 4 kPa is generated and drained to the sink 45 together with tap water. The water flow aspirator 44 has chemical resistance such as glass, metal, and fluororesin, and is used for an exhaust system mixed with water such as suction filtration (for example, see Non-Patent Document 2).
Further, normally, when waste liquid generated in an experiment is harmful, a portable vacuum pump aspirator device or the like shown in FIG. 5 is placed on the experiment table 30 or the floor, and the waste liquid 58 is sucked from the capillary 50 and collected. It is stored in the container 55 and processed separately. In this method, a waste liquid collection container 55 such as a collection bottle is sealed, and a vacuum is drawn by a diaphragm type vacuum pump 57 through an adjustment valve 56 whose opening degree can be adjusted, and a glass pipette 51 and a flexible tube 53 are drawn from the capillary 50. The waste liquid 58 is sucked and stored in the waste liquid collecting container 55 through the valve 54. The adjustment valve 56 is operated by the operation switch 52, and the pressure in the waste liquid collecting container 55 is detected by the pressure gauge 59, and a predetermined degree of vacuum is set, and the valve 54 is opened for use. When the surface of the waste liquid 58 of the waste liquid collection container 55 reaches a predetermined height, the waste liquid is taken out and separately subjected to waste liquid treatment (for example, see Non-Patent Document 3).
[0005]
[Non-Patent Document 1]
Shimadzu Rika Instruments Co., Ltd., “Central Laboratory”, [online], [Search October 1, 2002], Internet <URL: http://www.shimadzu-rika.co.jp/product/543009.html >
[Patent Document 1]
JP-A-5-38456 (Page 1-4, Fig. 1-4)
[Non-Patent Document 2]
"EYELA catalog" Tokyo Rika Kikai Co., Ltd., published in 2001, p274, aspirator: AS type, AT type [Non-patent Document 3]
"Science 2000 catalog" Shimadzu Rika Instrument Co., Ltd., published in 2000, p235, portable aspirator: MDA series [0006]
[Problems to be solved by the invention]
The conventional experimental bench is configured as described above. As a method for treating the waste liquid generated by the experiment, the waste liquid suction method using the water flow aspirator 44 is a tap water from a tap faucet 43 provided in the sink 45. There is a problem that the amount of water used becomes enormous because it does not function unless water is supplied at a predetermined flow rate or higher. The waste liquid is drained with an organic solvent or the like mixed therein, and there is a problem of environmental pollution. In addition, the suction method using the portable vacuum pump aspirator equipped with the vacuum pump 57 causes the work to be hindered because the vacuum pump aspirator is installed on the top plate 33 of the experimental table 30 or the floor of the laboratory. And there is a problem with danger. Further, there are problems that it is difficult to separate and manage the waste liquid that is generated, and that a plurality of suction operations are difficult at the same time.
[0007]
The present invention has been made in view of such circumstances, and an object thereof is to provide an experimental table with an aspirator that can safely manage and inhale waste liquid in a space with good workability.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the experimental bench of the present invention includes a plurality of drain tanks for collecting waste liquid, a suction pipe connected to the drain tank for sucking waste liquid, and connected to the drain tank via a suction pipe. In the laboratory table equipped with a vacuum pump, a switching / operation mechanism for switching the flow path of the suction pipe and evacuation operation is further provided, and waste liquid can be switched and stored in each drain tank. To do.
[0009]
Further, bench of the present invention is characterized in that the suction pipe is plural.
Further, the experimental bench of the present invention is characterized in that a switching / operation mechanism is provided for each suction pipe.
The experimental bench of the present invention is characterized in that the tip of the suction pipe is a capillary.
Furthermore, the experimental bench of the present invention is characterized in that the drain tank is provided with a level detection mechanism for detecting the liquid level.
[0010]
Since the experimental bench of the present invention is configured as described above , the waste liquid can be collected and stored in a plurality of drain tanks and managed easily by the switching / operation mechanism.
In addition, by providing a plurality of suction pipes, a plurality of workers can perform a waste liquid suction work at each place, and the work efficiency of the experiment can be improved. The tip of the suction pipe is a capillary (capillary) , so that a very small amount of waste liquid can be sucked .
Further, since the amount of waste liquid stored in the drain tank can be detected, it is easy for the operator to grasp the processing time of the waste liquid in the tank.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the experimental bench of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a flow path of waste liquid sucked in an experimental bench of the present invention. FIG. 2 shows the appearance of the experimental bench of the present invention, (a) is a front view, (b) is a plan view, and (c) is a side view.
[0012]
The experimental bench of the present invention includes a plurality of flexible tubes 3 that are provided with a glass pipette 2 at the tip thereof and a capillary 1 for sucking waste liquid, and can be drawn out from the experimental bench, and are connected to the flexible tubes 3 and multi-valves (switching valves) 6 and 7. A plurality of suction pipes 62, a plurality of drain tanks 8 and 9 connected to the suction pipes 62 for storing the waste liquids 13 and 14, and connected to reduce the internal pressure of the drain tanks 8 and 9, respectively, for vacuum A suction pipe 63 having electromagnetic valves 10 and 11, a vacuum pump 12 connected to the suction pipe 63, a plurality of changeover switches 4 for operating the multi-valves 6 and 7 at the hands of the experimental table, and a hand of the experimental table And a plurality of operation switches 5 for operating the vacuum solenoid valves 10 and 11, and level meters 18 and 15 for detecting the liquid levels of the waste liquids 13 and 14 stored in the drain tanks 8 and 9. Bisore the composed full indicator 17 and an external processing unit for drainage solenoid valve 16 for draining the for issuing an alarm.
[0013]
Next, the structure of the experimental bench and the arrangement of each part will be described. This experimental bench is an experimental bench for a rectangular research experiment in which the experimental bench 19 can be operated from both sides, and the main body of the experimental bench 19 is assembled by a painted steel square pipe frame or a double-sided decorative board, and is an upper surface to work on. A top plate 21 made of a ceramic plate, synthetic resin, stainless steel or the like is used, and a vertical panel is provided in the center. A plurality of change-over switches 4 and operation switches 5 are provided on the vertical panel. Correspondingly, a plurality of flexible tubes which are provided with a capillary 1 for inhaling waste liquid at the tip of the glass pipette 2 in the vicinity thereof and which can be taken in and out of the experimental table 19. 3 is stored.
[0014]
In the center of the lower part, a storage box is provided in which an openable / closable door is opened from the front and back to store laboratory instruments and the like, and drawers that can store reagents, samples, etc. are provided on both sides of the lower part. A stainless steel sink 20 is attached to the right end of the experimental table 19 for sample processing performed on the experimental table 19, harmless waste liquid generated during the experiment, and cleaning of experimental instruments and equipment. A faucet 22 is provided. An electrical outlet is provided on the top surface of the top plate 21 or the side surface of the experimental table 19 in order to perform the experiment by placing the experimental device on the top plate 21.
[0015]
Inside the experimental table 19, the vacuum pump 12 is set to be movable when the lower left central door is opened, and the vacuum suction pipe 63 from the vacuum pump 12 is set below the sink 20. The drain tanks 8 and 9 are evacuated to a low pressure by the vacuum pump 12 via the vacuum solenoid valves 10 and 11 connected to the valves 10 and 11. On the other hand, a flexible tube 3 that is set so as to be freely inserted into and removed from the upper portion of the experimental table 19 and that is equipped with a glass pipette 2 with a capillary 1 for suctioning waste liquid is housed at the tip, and each flexible tube 3 is connected to a sink 20 of the experimental table 19. Is connected to the multi-valves 6 and 7 attached to the suction pipes 62 of the drain tanks 8 and 9 which are set below the waste water, and the waste liquid is sucked into the drain tanks 8 and 9 through the multi-valves 6 and 7. Can be stored.
[0016]
The drain tanks 8 and 9 are provided with level meters 15 and 18 for detecting the liquid levels of the various waste liquids 13 and 14, and a full tank indicator 17 for issuing an alarm if the liquid level exceeds the limit depth. In addition, a drain electromagnetic valve 16 is provided for draining to the outside in response to the signal.
The above operation is performed by a plurality of change-over switches 4 and operation switches 5 provided on the vertical panel in the center of the experimental table 19, and the multi-valves 6 and 7 are selected by the change-over switch 4, and the vacuum switch The valves 10 and 11 are selected for operation, the drain tanks 8 and 9 are selected, and the waste liquids 13 and 14 are separated and stored.
[0017]
Next, the operation of the experimental bench and the waste liquid flow path will be described. In order to inhale the unnecessary solution generated by the experiment, first, the flexible tube 3 including the glass pipette 2 with the capillary 1 housed in the upper vertical panel of the experimental table 19 is pulled out. Whether an unnecessary solution is stored in the drain tank 8 as the waste liquid 13 or in the drain tank 9 as the waste liquid 14 is determined, and the multi-valve 6 or 7 is operated and selected by the changeover switch 4 provided on the vertical panel.
[0018]
Next, the operation switch 5 mounted on the vertical panel is turned on to operate the vacuum electromagnetic valve 10 or 11 connected to the drain tank 8 or 9 on the selected side to operate the vacuum pump 12, so that the drain tank Evacuate 8 or 9 to vacuum. Then, when the glass pipette 2 is grasped and the tip of the capillary 1 is put into an unnecessary solution, the solution is sucked into the drain tank 8 or 9 via the capillary 1, the glass pipette 2, the flexible tube 3, and the multi-valve 6 or 7. It is stored as waste liquid 13 or 14.
[0019]
When the waste liquid 13 or 14 stored in the drain tank 8 or 9 exceeds the limit depth, the level gauges 18 and 15 detect the depth, and a full tank display provided outside by the level gauge 18 signal. The device 17 issues an alarm, for example, an alarm lamp is lit and an alarm sound is emitted. In addition, the electromagnetic valve 16 for drainage is opened by a signal from the level meter 15, and the waste liquid 13 is drained to a waste liquid treatment apparatus provided outside.
[0020]
In this experiment table, the flexible tube 3 is housed in a plurality of locations on the upper vertical panel of the experiment table 19 so that the flexible tube 3 can be inserted and removed freely. The operator pulls out the flexible tube 3 from a location closer to the need, and the tip is capillary (capillary) processing. The formed glass pipette 2 can be easily replaced and used. Therefore, the thing of the various capillary dimensions according to a solution can be used.
The vacuum pump 12 and the drain tanks 8 and 9 are accommodated in the experimental table 19, and the flexible tube 3 for suction can be taken in and out, so that the work space on the experimental table 19 is wide and obstructs the work. It can be used effectively.
[0021]
Further, in order to cope with complicated research, a plurality of workers can pull out the flexible tube 3 at each place and simultaneously perform an aspirator inhaling operation. This improves the work efficiency of the experiment.
Further, the drain tank 8 or 9 can be selected by the change-over switch 4 provided on the vertical panel on the experimental table 19, and the power supply operation of the vacuum pump 12 can be performed by the operation switch 5. As a result, harmful solutions can be separated and managed in separate drain tanks 8 or 9 according to the experiment contents. Since the aspirator function by the vacuum pump 12 is used, useless water is not used, and organic solvents and the like are not directly drained by being mixed with water.
[0022]
In addition, the drain tanks 8 and 9 are equipped with level meters 15 and 18 that can detect the liquid levels of the waste liquids 13 and 14, respectively, and when the limit depth is exceeded, a signal is generated and the full indicator 17 issues an alarm. As an alarm, an alarm lamp is lit on the experiment table 19 and an alarm sound is generated to notify the operator. In addition, the electromagnetic valve 16 for drainage is opened by a signal from the level meter 15 and is automatically drained to a waste liquid treatment unit provided outside. For this reason, management of harmful waste liquid can be performed reliably. Moreover, the drain tanks 8 and 9 can be taken out individually, and the waste liquids 13 and 14 can be arbitrarily treated.
[0023]
The present invention has the features as described above, but the configuration is not limited to the above and illustrated examples. For example, although a type equipped with a plurality of aspirators and a multi-valve type switching system are used, a system in which each is turned on and off by a solenoid valve can also be used. Further, the present invention includes the case where only one is installed instead of a plurality.
[0024]
Bench of the present invention is constituted as described above, the suction pipe, the drain tank and the vacuum pump is accommodated in the bench, that impede the operator to work with without safe large space be able to. Further, the waste liquid can be easily collected and managed in a plurality of drain tanks by a switching / operation mechanism.
[0025]
By using a capillary at the tip of the suction tube, a very small amount of waste liquid can be sucked.
Further, since the amount of waste liquid stored in the drain tank can be detected, it is easy for the operator to grasp the processing time of the waste liquid in the tank.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a flow path configuration of an experimental bench according to the present invention.
FIG. 2 is a diagram showing the appearance of an experimental bench according to the present invention.
FIG. 3 is a view showing the appearance of a conventional experimental bench.
FIG. 4 is a view for explaining a conventional water flow aspirator.
FIG. 5 is a diagram for explaining a conventional vacuum aspirator.
[Explanation of symbols]
1, 40, 50 Capillary 2, 41, 51 Glass pipette 3, 42, 53 Flexible tube 4 Changeover switch 5, 52 Operation switch 6, 7 Multi valve 8, 9 Drain tank 10, 11 Vacuum solenoid valve 12, 57 Vacuum pump 13, 14, 58 Waste liquid 15 Level meter 16 Drainage solenoid valve 17 Fill indicator 18 Level meter 19, 30 Laboratory table 20, 31, 45 Sink table 21, 33 Top plate 22, 32, 43 Tap faucet 34 Drain pipe 35 Door 36 Drawer 44 Water flow aspirator 46 Drain pipe 54 Valve 55 Waste liquid collection container 56 Control valve 59 Pressure gauge 62, 63 Suction pipe

Claims (5)

A plurality of drain tanks for collecting waste liquid;
A suction pipe connected to the drain tank for sucking waste liquid;
A vacuum pump connected to the drain tank via a suction pipe;
An experimental bench equipped with
It further includes a switching / operation mechanism for switching the suction pipe flow path and evacuation operation,
An experimental bench characterized in that waste liquid can be switched and stored in each drain tank. 2. The experimental bench according to claim 1, wherein there are a plurality of suction pipes. 3. The test bench according to claim 2, wherein the switching / operation mechanism is provided for each suction pipe. 4. The experimental table according to claim 1, wherein the drain tank is provided with a level detection mechanism for detecting the liquid level. The experimental bench according to any one of claims 1 to 4, wherein a tip of the suction pipe is a capillary.

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