JP4364677B2 - Liquid removal system - Google Patents

Description

  The present invention relates to a method for draining liquid contained in a closed container, a drainage system, and an attachment used for the drainage method.

  Electrical devices such as transformers and capacitors are configured by housing a core in a container and filling the container with insulating oil. For a long time, polychlorinated biphenyl (PCB) added as an insulating oil with high electrical insulation (hereinafter referred to as PCB-containing insulating oil) has become widespread. However, as is well known, it has been a long time since PCB was found to be an environmental pollutant and its use was prohibited.

  For this reason, the production of electrical devices filled with PCB insulating oil in the container has been discontinued, and those that have already been produced and installed are sequentially collected when the equipment is updated. The recovered electrical equipment needs to carefully recover the PCB-containing insulating oil that is filled during disassembly. A general dismantling operation is a method in which a drain valve provided at the bottom of a container is first opened, and the PCB-containing insulating oil that flows out is recovered in a recovery container, and then the container and the core are disassembled.

  However, many of the containers of electrical equipment that have been used outdoors for many years are rusted on the outside or are more corroded. The drain valve of such a container cannot be fixed and cannot be opened, and if it is rotated forcibly, the valve body or the like may be damaged and the PCB-containing insulating oil may be ejected around.

  Therefore, conventionally, for electrical equipment that is difficult to recover PCB-containing insulating oil using a drain valve, or for electrical equipment that does not have a drain valve, a hole is drilled in the bottom of the container with a tool such as a drill, and then the PCB-containing insulating oil is used. Is discharged and collected in a collection container. However, when a hole is opened with a tool, a part of the PCB-containing insulating oil is scattered due to the head pressure in the container, which may cause PCB contamination to the surrounding environment and workers.

The same problem as described above applies to the dismantling of a container containing a liquid containing a dangerous chemical component if it leaks to the surroundings.
Therefore, the present invention has an object to solve the problem of draining a container containing such a liquid having environmental pollution or danger, and a new draining method, a draining system for that purpose, and an attachment used for the draining method. The purpose is to provide.

The liquid draining system according to the present invention is a liquid draining system for the liquid 2a contained in the closed container 2,
A support 3 for supporting the container 2, a drill device 4 having a drill 14 that can be raised and lowered , a liquid draining device 5, and a support 11 that supports the drill device 4 and the liquid draining device 5 in a laterally movable manner,
A cap-like attachment 40 having a gate portion 42 that opens only when pressed by the drill 14 or the drain pipe 19 ;
The drill device 4 includes a vertically movable drill 14, the liquid draining device 5 includes a vertically movable liquid drain pipe 19, and the attachment 40 is fixed to an outer surface above the liquid surface of the container 2. The drill 14 or the drainage pipe 19 can be inserted through the gate part 42 ( Claim 1 ).

In the liquid draining system, a cylindrical body having a gate at a tip end portion of the drill is supported so as to be slidable relative to the drill 14, and when the drill is lowered, the cylindrical body abuts on the attachment to cause the drill. When the gate portion is opened at the tip and the drill is raised, the gate portion can be configured to close by separating the cylinder from the attachment ( claim 2 ).

In any one of the above-described liquid draining systems, the drill device and the liquid draining device are supported by a common main body, and the main body is supported by the support body so as to be laterally movable. The rotary cylinder is composed of a rotary cylinder that is driven by a rotary elevator that can be moved up and down on the main body, and a drill that constitutes a drill device is provided at the tip of the rotary cylinder. A flow hole can be formed in the ( Claim 3 ).

Furthermore, in any one of the above-described liquid draining systems, the support base that supports the container can be tilted freely ( claim 4 ).

By using the liquid draining system according to the present invention, liquid draining can be performed quickly .
That is, a support 11 that supports the drill device 4 and the liquid draining device 5 in a laterally movable manner, and a cap-shaped attachment 40 having a gate portion 42 that opens only when pressed by the drill 14 or the liquid draining tube 19, The liquid draining device 5 has a vertically movable liquid drain pipe 19, and the attachment 40 is fixed to the outer surface above the liquid surface of the container 2, and the drill 14 or the liquid drain pipe 19 is passed through the gate portion 42 thereof. Since it is configured to be inserted,
When the through hole is opened in the container 2, the attachment gate portion 42 is automatically opened as the drill is pressed, and when the drill is pulled out, the gate portion 42 is automatically closed accordingly, and then the drainage pipe 19 is inserted and removed. Accordingly, the gate part 42 can be opened and closed in the same manner.
Since the drill device 4 and the liquid draining device 5 are provided on a support 11 that is supported so as to be laterally movable, the switching between the two can be performed quickly.
And the liquid in the container is extracted from above by using the through-hole on the outer surface above the liquid level of the container, so that the liquid does not leak to the surroundings at the time of extraction, and even if it is a dangerous liquid, the environment and work There is no fear of contamination.
Further, since the formation of the through hole and the draining of the liquid are performed through the attachment with the gate, it is possible to prevent the liquid in the container or the vapor thereof from scattering or diffusing around when forming the through hole or draining the liquid.
Furthermore, the posture of the drill for forming a through hole and the drainage pipe can be stabilized by using the attachment.
Further, in the case where the cylindrical body having the gate at the tip of the drill is slidably supported as described above, the drill is closed when the drill is lifted after the through hole is opened, The liquid can be prevented from dripping from the tip portion and being scattered around.

  Furthermore, when the drill device and the liquid draining device are supported by a common main body as described above and configured to support the main body so as to be laterally movable with respect to the support body, the device can be reduced in size and weight, Since the through hole can be formed and the liquid can be drained only by lifting and lowering the liquid drain pipe provided with a drill at the tip, the time spent for the liquid draining process can be greatly reduced.

  In any one of the above-described liquid draining systems, by tilting the support base that supports the container, the container can be tilted at a time near the end of the liquid draining operation, and the amount of liquid remaining at the bottom can be efficiently extracted. .

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a system for carrying out the liquid draining method of the present invention. FIG. 1 shows an example in which the liquid draining system of the present invention is applied to a transformer filled with PCB-containing insulating oil in a container, but the present invention can be similarly applied to a container containing other harmful or dangerous liquids.

  The liquid draining system is configured with a support base 3 that supports the container 2 of the transformer 1, a drill device 4, and a liquid draining device 5 as main parts. The support 3 is installed, for example, in a pit 6 formed on a concrete floor, and has an upper plate 7 that supports the transformer 1 and two columns 8 that support the lower side of the upper plate 7 (arranged in a direction perpendicular to the plane of the drawing). ), And two jack devices 9 that rotatably support the lower portion of the upper plate 7, and the bottoms of the two columns 8 are rotatably fixed to the floor of the pit. The driving operation of each jack device 9 is performed by an operation signal from an operation unit 10 including a computer device, a display device, an operation switch, and the like.

  The drill device 4 is supported by a support 11 formed of a frame so as to be movable laterally. The drill device 4 includes a main body 12 provided with a lifting drive unit, a rotation drive unit 13 connected to the main body 12, and a drill 14 rotated by the rotation drive unit 13. In addition, the raising / lowering drive part provided in the main body can be comprised by a rack and pinion mechanism, a cylinder, etc. The lifting mechanism and the rotation driving unit 13 are driven by an operation signal from the operation unit 10.

  The main body 12 of the drill device 4 is supported on the support 11 in a lateral direction by a moving unit 15 such as an LM guide mechanism or a wheel. The moving unit 15 is driven by a driving unit (not shown) housed in the main body 12, and the driving operation is performed by an operation signal from the operation unit 10. If desired, the drill device 4 can also be made horizontal in a direction perpendicular to the paper surface of FIG. In that case, another moving unit that moves in a direction orthogonal to the moving unit 15 is provided on the moving unit 15. A cylindrical body 17 having a gate is slidably supported at the tip of the drill 14 as desired. The specific structure will be described later.

  Similarly to the drill device 4, the liquid draining device 5 is also supported by the support 11 so as to be movable laterally. The liquid draining device 5 includes a main body 20 that houses an elevating drive unit (not shown), an elevating body 18 connected to the main body 20, and a liquid draining tube 19 connected to the elevating body 18. The main body 20 is supported on the support 11 so as to freely move in the lateral direction by a moving unit 21 such as an LM guide mechanism or wheels.

  The raising / lowering drive part provided in the main body 20 can be comprised by raising / lowering mechanisms, such as a rack and pinion mechanism and a cylinder, The drive operation is performed by the operation signal from the operation part 10. FIG. If desired, the liquid draining device 5 can be moved horizontally in a direction perpendicular to the paper surface. In that case, another moving unit that moves in a direction orthogonal to the moving unit 21 is provided on the moving unit 21.

  A flexible pipe 22 such as a hose is connected to the upper end of the drain pipe 19. The pipe 22 is connected to a liquid recovery pipe 27 provided with electromagnetic open / close valves 23 and 24, an electromagnetic three-way switching valve 25 and a pump 26, and the tip of the liquid recovery pipe 27 communicates with a liquid recovery tank 28. Further, a cleaning liquid supply pipe 31 provided with an electromagnetic on-off valve 29 and a pump 30 is connected to the pipe 22, and the tip of the cleaning liquid supply pipe 31 communicates with a cleaning liquid tank 34.

  A purge pipe 35 for supplying an inert gas such as nitrogen gas is connected to the main body 41 of the attachment 40 shown in FIG. 2, and the electromagnetic open / close valve 36 shown in FIG. For example, when explosive gas is present inside the container 2, the internal gas leaks into the main body 41 when the through hole is opened, but an inert gas is injected into the main body 41 from the purge pipe 35. Therefore, the explosion-proof measures can be taken.

  Further, a liquid discharge pipe 37 is connected to the main body 41 (FIG. 2) of the attachment 40, and the tip of the liquid discharge pipe 37 communicates with the liquid recovery tank 28 (FIG. 1). For example, when the inside of the container 2 is filled with PCB vapor and the internal pressure is higher than atmospheric pressure, the PCB-containing insulating oil may be ejected into the main body 41 by the internal pressure when the through hole is opened. When the discharge pipe 37 is connected to the main body 41, the ejected PCB-containing insulating oil can be recovered in the liquid recovery tank 28 without leaking outside.

  FIG. 2 is an enlarged view of the drill 14 and the cylindrical body 17 shown in FIG. A drill blade 14 a is formed at the tip of the drill 14, and a stopper 14 b is provided in the middle of the drill 14. And the upper end part of the cylinder 17 is latched by the stopper 14b. The cross section of the lower part of the cylindrical body 17 is enlarged, and a gate portion 17a made of a valve plate with a spring is provided inside the enlarged portion.

  When the valve plate of the gate portion 17a is not pressed downward by the drill 14, the spring tension is in a horizontal state as shown in FIG. 28A, that is, the upper opening is closed. When the drill 14 is pressed downward, it is rotated as indicated by a dotted line, and a vertical state as shown in FIG. 2B, that is, an upper opening is opened.

  On the other hand, the container 2 is filled with the liquid 2a which is a PCB-containing insulating oil, and the attachment 40 is attached to the outer surface above the liquid surface, specifically, the lid 2b of the container 2 with the adhesive 40b or the adhesive. It is fixed by etc. The attachment 40 can be removed and reused after use. The attachment 40 includes a cap-shaped main body 41 and a gate portion 42 formed of a valve plate with a spring provided on the main body 41. An annular housing 43 extending outward is formed on the upper edge of the main body 41, and the lower surface of the cylindrical body 17 lowered as shown in FIG. Yes. Further, the ends of the purge pipe 35 and the liquid discharge pipe 37 communicate with each other through the side wall of the main body 41.

  When the valve plate of the gate portion 42 is not pressed downward by the drill 14, the spring tension is in a horizontal state as shown in FIG. 2A, that is, the upper opening is closed. When the drill 14 is pressed downward, it rotates like a dotted line, and is in a vertical state as shown in FIG. 2B, that is, an upper opening is opened, and the tip of the drill 14 is brought into the main body 41. enter in.

  Next, a method for forming a through hole in the container 2 of the transformer 1 with the drill device 4 will be described. First, in FIG. 1, the transformer 1 is placed on a support base 3 with the upper plate 7 in a horizontal state. Next, the attachment 40 is fixed to the position of the lid portion 2b forming the through hole for drainage shown in FIG. 2 with an adhesive 40b or an adhesive (FIG. 2A). Further, another attachment 40 (not shown) is fixed in the same manner at a position where a through hole for venting (air venting or air entry) is formed as desired.

  Next, a movement operation signal is output from the operation unit 10 to the drill device 4, and the movement unit 15 is driven to move the drill device 4 to above the attachment 40 fixed at the formation position of the drainage through hole (see FIG. 2 (a)). Next, a lowering operation signal is output from the operation unit 10 to the drill device 4, and the lift drive unit is driven to lower the drill 14. Then, as shown in FIGS. 2A and 2B, the cylindrical body 17 slidably provided at the tip of the drill 14 descends together with the drill 14, but the lower edge of the cylindrical body 17 is provided on the attachment 40. After coming into contact with 43, only the drill 14 descends as shown in FIG.

  When the drill 14 is lowered, first, the gate portion 17a provided on the cylindrical body 17 is pressed and opened downward by the tip of the drill 14, and when further lowered, the gate portion 42 of the attachment 40 is pushed downward by the tip of the drill 14. Finally, the tip of the drill 14 comes into contact with the upper surface of the lid 2b. Next, a rotation operation signal is output from the operation unit 10 to the drill device 4, and the rotation driving unit 13 is driven to rotate the drill 14. Then, by lowering the drill 14 while rotating, a through hole for drainage is formed in the lid 2b of the container 2 as shown in FIG.

  When it is confirmed that the through hole for draining is formed in the lid 2b, an ascending operation signal is output from the operation unit 10 to the drill device 4, and the lift driving unit is driven to raise the drill 14. When the drill 14 is raised to the position shown in FIG. 2 (a), an ascending stop signal and a rotation stopping signal are output from the operation unit 10 to the drill device 4, and the drill 14 is stopped from ascending and rotating, thereby penetrating the liquid. The hole forming operation is completed.

  When the tip of the drill 14 passes through the gate portion 42 of the attachment 40 when the drill 14 is lifted, the gate portion 42 pressed by the drill 14 is closed by the restoring force of the spring. Further, when the tip of the drill 14 passes through the gate portion 17a of the cylindrical body 17, the gate portion 17a pressed by the drill 14 is closed by the restoring force of the spring. Finally, when the stopper 14 b of the drill 14 comes into contact with the upper end portion of the cylindrical body 17, the cylindrical body 17 rises together with the drill 14 and separates from the attachment 40. Next, a through-hole for venting is formed in the lid portion 2b by the same operation, and finally, a movement operation signal is output from the operation portion 10 to the drill device 4, and the drill device 4 is returned to the original position.

  Next, a method for draining liquid using the through holes formed as described above will be described. First, in FIG. 1, a movement operation signal is output from the operation unit 10 to the liquid draining device 5, and the liquid draining device 5 is moved above the attachment 40 in which the liquid draining through hole is formed by driving the moving unit 21. To do. Next, a lowering operation signal is output from the operation unit 10 to the liquid draining device 5, and the lifting body 18 is driven to lower the liquid draining pipe 19.

  When the tip of the drain pipe 19 reaches the gate part 42 of the attachment 40, the gate part 42 is pressed and opened downward (inward). When the liquid draining pipe 19 is further lowered, it passes through the liquid draining through hole and reaches the liquid in the container 2. FIG. 3 shows this state.

  Next, a liquid draining operation signal is output from the operation unit 10, the pump 26 shown in FIG. 1 is operated, the on-off valves 23 and 24 are opened, and the three-way switching valve 25 is driven to connect the ports to ac. Switch between a and b. Then, the liquid 2 a in the container 2 is pumped up by the pump 26 and is recovered from the liquid draining pipe 19 to the liquid recovery tank 28 via the liquid recovery pipe 27. In the case where the vent through hole is provided, it is possible to effectively prevent the outside air from being sucked through the through hole and the inside to become a negative pressure.

  If the draining is continued, the level of the liquid 2a in the container 2 gradually decreases. When the level of the liquid 2a reaches near the bottom of the container 2, the liquid may be insufficiently discharged. In this case, the liquid is further drained after the container 2 is inclined at an appropriate angle. For this purpose, an inclination operation signal is output from the operation unit 10 to the jack device 9 of the support base 3, and the jack apparatus 9 is driven to incline the support base 3 from a horizontal state at a predetermined angle. When it is confirmed that the liquid draining operation is completed, a liquid drain stop signal is output from the operation unit 10, the on-off valves 23 and 24 are closed, and the communication of the port of the three-way switching valve 25 is returned between the ports ac.

  Next, a method for cleaning the container 2 after the liquid draining operation is completed will be described. First, a cleaning liquid supply operation signal is output from the operation unit 10, the pump 30 shown in FIG. 1 is operated, and the on-off valve 29 is opened. Then, the cleaning liquid in the cleaning liquid tank 34 is pumped up by the pump 30 and supplied from the cleaning liquid supply pipe 31 through the liquid drain pipe 19 into the container 2. When the cleaning liquid is filled in the container 2, a cleaning liquid stop signal is output from the operation unit 10, the pump 30 is stopped, the on-off valve 29 is closed, and the supply of the cleaning liquid is stopped.

  After the supply of the cleaning liquid is stopped, the container 2 is kept still for a while, or the support 3 is moved between the tilt and the horizontal as described above and shaken. Next, when a predetermined time has elapsed, a cleaning liquid recovery operation signal is output from the operation unit 10, the pump 26 is operated, and the on-off valve 23 is opened. Then, the cleaning liquid in the container 2 is pumped up by the pump 26 and recovered from the liquid draining pipe 19 to the cleaning liquid tank 34 via the liquid recovery pipe 27. These operations complete one cleaning operation, but the same cleaning operation is repeated an appropriate number of times for the same container 2 as necessary.

  FIG. 4 is a partial sectional view showing another example of a drill device and a liquid draining device used in the liquid draining method of the present invention. In the present embodiment, the drill device 4 and the liquid draining device 5 are supported by a common main body 50, and the main body 50 is supported by the support body 11 through the moving portion 51 so as to be laterally movable. The main body 50 is provided with an up-and-down rotation drive unit (not shown), and an up-and-down rotation body 52 is connected to the up-and-down rotation drive unit. The liquid draining pipe 19 constituting the liquid draining device 5 is constituted by a rotating cylinder 53 from its intermediate part to the tip part, and the rotating cylinder 53 is rotationally driven by an ascending / descending rotary body 52.

  A drill 14 constituting the drill device 4 is provided at the tip of the rotary cylinder 53, and a flow hole 54 penetrating the side wall is provided in the rotary cylinder 53 near the drill 14. Further, the cylindrical body 17 is slidably provided at the distal end portion of the rotating cylinder 53, and a gate portion 17a formed of a valve plate with a spring is provided at an intermediate portion of the cylindrical body 17. Further, a stopper 53a is provided at an intermediate portion of the rotating cylinder 53, and the upper end portion of the cylinder 17 is locked to the stopper 53a.

  FIG. 5 is an enlarged sectional view of the ascending / descending rotary body 52 shown in FIG. The ascending / descending rotator 52 includes a case 55, a bearing portion 56 and a pulley 57 disposed in the case 55. The bearing portion 56 has an upper member 58 provided at the end of the liquid draining pipe 19, a lower member 59 provided on the upper side of the pulley 57, and a bearing 60 supported by the upper and lower sides thereof. An annular packing 61 is attached to ensure the above. An endless rotating belt 62 connected to a rotating pulley in a lifting / lowering driving unit of the main body 50 (see FIG. 4) is suspended from the pulley 57, and only the rotating cylinder 53 is rotationally driven by the rotation of the rotating belt 62.

  In the embodiment shown in FIG. 4, as in the example of FIG. 2, the attachment 40 is fixed to the lid portion 2 b of the container 2 with an adhesive or a pressure-sensitive adhesive, and through holes are formed and drained using the attachment 40. . The attachment 40 includes two gate portions 42 and 42a arranged in parallel in the vertical direction, and the structure and operation of the lower gate portion 42 are the same as in the example of FIG. On the other hand, the upper gate portion 42a does not have a spring, but instead has a drive projection 42b connected to the end of the valve plate. Since this attachment 40 has a double gate portion, it is possible to more effectively prevent liquid and vapor from splashing and diffusing in the process of through-hole formation and liquid draining operation.

  Next, through-hole formation and liquid draining operation to the container 2 will be described using the apparatus shown in FIG. First, a lowering operation signal is output from the operation unit 10 to the main body 50 to drive the lifting rotary body 52 to lower. When the lower edge of the cylindrical body 17 provided at the tip of the drill 14 pushes down the drive projection 42b of the attachment 40, the upper gate part 42a is pivoted upward to open, and the drill 14 is further lowered to the side. When pressing the lower gate portion 42, the gate portion 42 opens downward.

  Next, a rotation operation signal is output from the operation unit 10 to rotate the rotating cylinder 53. Then, a through hole is formed in the lid portion 2 b of the container 2 by the rotation of the drill 14 provided at the distal end portion of the rotating cylinder 53. In the embodiment of FIG. 4, the suction port 40a is provided in the attachment 40, and the suction port 40a and a suction part (not shown) provided with a dust bag and a suction blower provided in the main body 50 are connected by a pipe 40c such as a hose. ing. Then, fine cutting waste generated when the through hole is formed is sucked into the main body 50 so that the cutting waste does not stay in the main body 41 of the attachment 40.

When the formation of the through hole is completed, a rotation stop signal is output from the operation unit 10 and the rotation of the rotary cylinder 53 is stopped. Next, a liquid drain operation signal is output from the operation unit 10 and the liquid drain operation similar to the example of FIG. 1 is performed. The liquid 2 a in the container 2 is sucked into a through hole 54 provided in the rotary cylinder 53 and pumped out to the pipe 22 via the liquid drain pipe 19 communicating with the rotary cylinder 53. The subsequent processing is in accordance with the example of FIG.
Of course, the present invention is not limited to the above-described embodiment. For example, the attachment 40 and the gate portions 42 and 17a of the cylindrical body 17 may be opened and closed by other methods. As an example, an electromagnetic actuator can be attached to the gate portion and opened and closed by an electrical signal.

  The liquid draining method and the liquid draining system of the present invention can be used for draining a transformer container or the like containing PCB-containing insulating oil. Moreover, the attachment of this invention can be utilized for the said liquid removal method.

Explanatory drawing of the system which implements the liquid draining method of this invention. The enlarged view of the drill 14 shown in FIG. The figure explaining the state which has drained using the apparatus of FIG. The fragmentary sectional view which shows the other example of the drill apparatus used for the liquid draining method of this invention, and a liquid draining apparatus. The expanded sectional view of the raising / lowering rotary body 52 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transformer 2 Container 2a Liquid 2b Cover part 3 Support stand 4 Drill apparatus 5 Liquid removal apparatus 6 Pit 7 Upper board 8 Support | pillar 9 Jack apparatus 10 Operation part

DESCRIPTION OF SYMBOLS 11 Support body 12 Main body 13 Rotation drive part 14 Drill 14a Drill blade 14b Stopper 15 Moving part 17 Cylindrical body 17a Gate part 18 Lifting body 19 Drain pipe 20 Main body

DESCRIPTION OF SYMBOLS 21 Moving part 22 Piping 23,24 On-off valve 25 3 way switching valve 26 Pump 27 Liquid recovery pipe 28 Liquid recovery tank 29 On-off valve 30 Pump

31 Cleaning liquid supply pipe 34 Cleaning liquid tank 35 Purge pipe 36 On-off valve 37 Liquid discharge pipe 40 Attachment 40a Suction port 40b Adhesive 40c Piping 41 Main body 42, 42a Gate part 42b Drive protrusion 43 Housing 50 Main body

REFERENCE SIGNS LIST 51 Moving part 52 Elevating rotary body 53 Rotating cylinder 53a Stopper 54 Flow hole 55 Case 56 Bearing part 57 Pulley 58 Upper member 59 Lower member 60 Bearing 61 Packing 62 Rotating belt

Claims (4)

In the liquid draining system for the liquid 2a contained in the closed container 2,
A support 3 for supporting the container 2, a drill device 4 having a drill 14 that can be raised and lowered , a liquid draining device 5, and a support 11 that supports the drill device 4 and the liquid draining device 5 in a laterally movable manner,
A cap-like attachment 40 having a gate portion 42 that opens only when pressed by the drill 14 or the drain pipe 19 ;
The liquid draining device 5 has a vertically movable liquid drain pipe 19, and the attachment 40 is fixed to the outer surface above the liquid surface of the container 2, and the drill 14 or the liquid drain pipe 19 is passed through the gate portion 42. A liquid draining system configured to be able to insert a liquid. In claim 1 ,
A cylindrical body 17 having a gate 17a is supported slidably relative to the drill 4 at the tip of the drill 14, and when the drill 14 is lowered, the cylindrical body 17 comes into contact with the attachment 40 to cause the drill. The liquid draining system is configured such that when the gate portion is opened at the tip and the drill is raised, the cylindrical body 17 is separated from the attachment 40 and the gate portion is closed. In claim 1 or 2 ,
The drill device 4 and the liquid draining device 5 are supported by a common main body 50, the main body 50 is supported by the support 11 so as to be movable laterally, and the liquid draining pipe 19 constituting the liquid draining device 5 is inserted from the middle portion to the tip. The rotating cylinder 53 is rotationally driven by an ascending / descending rotary body 52 provided on the main body 50 so as to be movable up and down, and a drill 14 constituting the drill device 4 is provided at the tip thereof. A fluid draining system, wherein a flow hole is formed in a rotary cylinder 53 in the vicinity of a drill. In any of claims 1 to 3 ,
The liquid draining system according to claim 1, wherein the support table 3 for supporting the container 2 is tiltable.

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