JP2016108968A - Recovery portion of after-cooler drainage in compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contamination of a peripheral environment in accompany with discharge of drainage by surely recovering after-cooler drainage collected by a drainage separator without discharging the same to the outside of a compressor.SOLUTION: In a compressor 1 including an after-cooler 40 for cooling a compressed gas produced in a compressor body 5, and a drainage separator 41 for collecting drainage generated in cooling, a frame 20 configuring a bottom portion of a soundproof box 10 accommodating components of the compressor 1 is provided with a bottomed box-shaped oil retaining weir for storing an oil and a fuel leaking out from the components and preventing their leakage to the outside of the machine. A drainage tank 50 for recovering the drainage of the drainage separator 41 is disposed inside of the soundproof box 10, the drainage tank 50 is provided with an outlet 52 for allowing the drainage over a prescribed amount to overflow, and the outlet 52 is communicated with a space S inside of the oil retaining weir to recover the overflowing drainage to the space S in the oil retaining weir.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an aftercooler drain recovery unit in a compressor, and more specifically, an aftercooler that cools compressed gas to dry the compressed gas generated by the compressor body and supply the compressed gas to the consumer side, and the aftercooler The present invention relates to a structure of a recovery unit that recovers the drain collected by the drain separator in a compressor including a drain separator that collects steam condensed by cooling as drain.

  A compressor that generates a compressed gas by compressing a compressed gas such as air is used in various situations as a supply source of the compressed gas to an air working machine or the like.

  As an example of such a compressor, an oil-cooled screw compressor will be described as an example. In this oil-cooled screw compressor, the compression working space of the compressor body is lubricated, sealed and cooled. The cooling oil is introduced into the compression working space, and the compressor body discharges compressed gas as a gas-liquid mixed fluid with the cooling oil.

  Therefore, the compressed gas discharged from the compressor body together with the cooling oil is introduced into the separator receiver tank, and after the primary separation of the cooling oil is performed in the separator receiver tank, the oil content contained in the compressed gas by the oil separator is further reduced. Is secondarily separated and then supplied to the consumer.

  In such a compressor, when it is required to supply dry compressed gas to the consumer side, the compressed gas after passing through the oil separator is further introduced into the aftercooler and cooled, so that the compressed gas is introduced into the compressed gas. Condensed water vapor is condensed and the condensed water vapor is separated and collected as a drain by a drain separator, so that dried compressed gas from which moisture has been removed can be supplied to the consumer side.

  A drain pipe composed of a hose or the like is connected to the lower part of the drain separator. By extending the drain pipe to the outside of the machine, the drain collected by the drain separator is removed from the machine by the pressure of the compressed gas. In general, a configuration for discharging is used.

  However, since the cooling oil that could not be removed by the oil separator is also collected with the drain collected by the drain separator, the drain is discharged directly to the outside via the drain pipe and absorbed by the ground. In this case, there is a problem that the area around the compressor is contaminated by the cooling oil contained in the drain.

  In order to prevent such contamination due to aftercool drain drain, the drain discharged outside the machine via the drain pipe can be recovered in the storage tank to prevent contamination due to after cool drain drain. Such a compressor has also been proposed (see FIG. 1, [0020] column, etc. of Patent Document 1).

JP 2004-19443 A

  In the compressor introduced as the above-mentioned Patent Document 1, although the aftercooler drain is discharged outside the machine through the drain pipe, a configuration is adopted in which the discharged drain is collected in the storage tank. By appropriately discarding the collected drain, it is possible to prevent the surrounding environment of the compressor from being contaminated by the drain.

  However, since there is a limit to the amount of drain that can be collected in the storage tank, the drain accumulated in the storage tank must be periodically discarded. It may overflow and contaminate the surroundings.

  In particular, when the humidity of the compressed gas is high, a large amount of drainage may occur beyond expectations. In the configuration described in Patent Document 1, a storage tank opened upward is disposed outside the machine. In addition, since the drain is collected (Figure 1, [0020] column of Patent Document 1), rainwater and the like are collected in the storage tank in addition to the drain. Even if the operator pays attention, such as when the storage tank fills up in a short time and the drain overflows, it is not possible to completely prevent drain leakage.

  Since the drain collected by the drain separator is discharged into the storage tank through the drain pipe due to the pressure of the compressed gas generated by the compressor body, the drain pipe is extended outside the machine. In the configuration of the compressor, during the operation of the compressor, since the compressed gas discharged through the drain pipe continues to generate a discharged sound, this discharged sound becomes noise.

  Therefore, the present invention was made to eliminate the above-mentioned drawbacks of the prior art, and adopted a configuration in which the aftercooler drain collected by the drain separator was recovered without being discharged outside the apparatus and recovered. Even if the drain is neglected, there is no risk of the drain leaking out of the machine, so that it is possible to reliably prevent the compressor installation site and its surroundings from being contaminated, and at the time of collecting the drain that generates noise. An object of the present invention is to provide a compressor in which further consideration is given to the environment by providing an aftercooler drain recovery part of the compressor that can reduce the exhaust air noise.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This code is used to clarify the correspondence between the description of the scope of claims and the description of the mode for carrying out the invention. Needless to say, it is used in a limited manner for the interpretation of the technical scope of the present invention. It is not a thing.

In order to achieve the above object, the aftercooler drain recovery part in the compressor of the present invention comprises:
A compressor main body 5 that compresses a gas to be compressed to generate a compressed gas, an aftercooler 40 that cools the compressed gas generated by the compressor main body 5, and a drain that is cooled by the aftercooler 40, and drain is separated from the compressed gas. In the compressor including the drain separator 41 to be collected in the component equipment, and housing the component device in the soundproof box 10,
The soundproof box 10 is formed by a frame 20 that forms the bottom of the soundproof box 10, and a bonnet 30 that covers the frame 20, and
An oil-proof weir (oil fence or oil pan) formed in a box shape with a bottom is formed on the frame 20 to prevent oil from leaking out of the machine by accumulating oil and / or fuel leaked from the components. ,
A drain tank 50 that collects the drain collected by the drain separator 41 is disposed in the soundproof box 10, and
The drain tank 50 is provided with an outlet 52 that overflows when the drain recovered in the drain tank 50 exceeds a predetermined amount, and the drain discharged through the outlet 52 is placed in the space S in the oil proof weir. It can be introduced (claim 1).

  The drain tank 50 may be provided with an inlet 51 communicating with the drain separator 41, and the drain tank 50 may be hermetically sealed except for the inlet 51 and the outlet 52 portions (Claim 2).

  With the configuration of the present invention described above, the following remarkable effects can be obtained in the compressor 1 including the aftercool drain recovery unit of the present invention.

  The drain collected by the drain separator 41 is collected in a drain tank 50 disposed in the soundproof box 10 and an outlet 52 provided in the drain tank 50 when the drain amount in the drain tank 50 exceeds a predetermined amount. The drain that has overflowed through the drainage dam is collected in the space S in the oil proof weir, so that the drain that exceeds the capacity is discarded in the drain tank 50, such as forgetting to discard the drain collected in the drain tank 50. Even if it was introduced, there was no concern of drain leaking outside the machine, and it was possible to prevent the compressor installation site from being contaminated with drain.

  In addition, unlike the configuration described in Patent Document 1 in which a tank for collecting drain (storage tank) is disposed outside the apparatus, the drain tank 50 is disposed in the soundproof box 10 in the present invention. In addition, it is possible to reduce the noise accompanying the air release by shielding the air released from the compressor body with the soundproof box 10 and making it difficult to leak out of the machine. Even when an open structure was used, it was possible to prevent the drain tank 50 from overflowing due to accumulation of rainwater or the like.

  When the drain tank 50 is attached to the compressor 1, the drain tank 50 is sealed except for the inlet 51 and outlet 52 portions, so that the drain collected in the drain tank 50 is discharged from other than the outlet 52. For example, when the compressor is tilted or swayed, such as when the compressor 1 is suspended by a crane with the drain accumulated in the drain tank 50, or transported or moved by a truck, etc. Even so, the drain recovered in the drain tank 50 could be prevented from leaking out of the machine.

  In addition, by adopting the drain tank 50 having the above-described configuration, the compressed gas released together with the drain via the drain separator 41 is once expanded in volume in the drain tank 50 and then in the oil-proof weir via the outlet 52. Since the drain tank plays the role of a silencer (expansion chamber) that reduces the aeration noise, the noise associated with the aeration of the compressed gas can be further reduced. It was.

The front perspective view of the compressor provided with the aftercool drain collection structure of the present invention. The plane perspective view of the compressor provided with the aftercool drain collection structure of the present invention. The enlarged view of the broken-line part shown by the arrow A in FIG. The aftercooler drain collection | recovery part seen from the arrow B direction of FIG. The perspective view of a lower frame.

  Hereinafter, a configuration of a compressor provided with an aftercooler drain recovery unit of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a front perspective view of a compressor provided with an aftercooler drain recovery part of the present invention. The compressor 1 shown in FIG. 1 is necessary in a soundproof box 10 constituted by a frame 20 and a bonnet 30. It is configured as a soundproof type engine driven compressor 1 that houses equipment.

  The above-described frame 20 constituting the soundproof box 10 functions as a base for mounting the components of the compressor 1, and oil-proofing prevents oil and fuel leaking from the components from leaking out of the machine. It has a function as a weir (generally called an oil fence or an oil pan). In the illustrated embodiment, a flat surface is formed on the lower frame 21 formed in a bottomed box shape. The frame 20 is formed by mounting and fixing an upper frame 25 made of a channel material combined in a rectangular shape.

  The above-described lower frame 21 mainly gives the frame 20 a function as an oil proof weir. As an example, as shown in FIG. 5, the bottom plate 211 having a rectangular shape in plan view and 4 raised from above the bottom plate 211. It is formed by the side wall 212-215 of a sheet | seat, and is comprised as an oil-proof dam which can store the leaked oil and fuel in the space S enclosed by the baseplate 211 and the four side wall 212-215.

  In the illustrated embodiment, the fuel tank 4 storing the fuel to be supplied to the engine 3 is accommodated in the space S of the oil proof weir so that even if the fuel leaks from the fuel tank 4, The fuel can be prevented from leaking outside the oil proof weir, and the space for accommodating the fuel tank 4 in the soundproof box 10 is not required, so that the compressor 1 can be downsized.

  In the illustrated example, the side walls 212, 213, and 214 are raised from two sides in the longitudinal direction of the bottom plate 211 and one side in the width direction, and inside a predetermined length with respect to one side 211 a in the width direction of the bottom plate 211. The side wall 215 is raised from the entered position, and the space S surrounded by the bottom plate 211 and the side walls 212 to 215 is configured as an oil-proof dam for storing leaked oil and fuel, and the side 211a of the side wall 215 and the bottom plate 211 is formed. A drain tank accommodating portion 27 for accommodating a drain tank 50 described later is formed in the space formed therebetween.

  The above-described upper frame 25 gives the frame 20 a function as a base for mainly mounting components. In this embodiment, four channel members having a U-shaped cross section are used as the above-mentioned U-shaped channel material. The upper frame 25 is formed by assembling into a frame shape so as to open inward, and the upper frame 25 is placed on the side walls 212 to 215 of the lower frame and fixed detachably with bolts or the like. The side walls 212 to 215 of the frame 21 are extended upward, and the engine 3, the compressor body 5, the receiver tank 7, the oil separator 9, the radiator 6, the engine exhaust system on the upper frame 25 in the compressor components. 8, components such as an aftercooler 40, a drain separator 41, and the like can be mounted.

  In the present embodiment, the floor plate 251 is provided on the upper frame 25 described above, and an opening 252 is formed in the floor plate 251 at the lower part of the mounting position of the engine 3, thereby forming a space formed on the floor plate 251. And the space S formed below the floor plate 251 communicate with each other so that oil and fuel leaked from the equipment such as the engine 3 can be introduced into the space S in the oil proof weir.

  Thus, by configuring the frame 20 by the combination of the upper frame 25 and the lower frame 21, it is possible to exert a function as a base on which the component device is mounted only by the upper frame 25. The upper frame 25 can be easily separated from the lower frame 21 by lifting the upper frame 25 together with equipment mounted on the upper frame 25 and the bonnet 30 with the crane, etc., with the bolts for fixing the frame 21 removed. In this way, by allowing the lower frame 21 to be separated, the space S formed in the lower frame 21 is exposed to facilitate maintenance work such as cleaning of the space S and inspection of the fuel tank. Yes.

  Of the spaces formed in the soundproof box 10, the space formed above the frame 20 (above the floor plate 251) is the other configuration of the compressor except for the fuel tank 4 and the drain tank 50 described above. Forms a space for housing equipment.

  As shown in FIG. 1, this space is divided into two chambers, a work machine room 10a and a wind exhaust room 10b, by a partition wall 13. Preferably, the work machine room 10a is divided into the above-described drain tank housing portion. 27 is formed on the same side as the side provided with 27, and in this working machine room 10a, there are an engine 3, a compressor body 5 which is an oil-cooled screw compressor, a receiver tank 7, an oil separator 9, an aftercooler 40, a drain separator. 41 and other devices are accommodated.

  The arrangement of the components in the working machine room 10a is not particularly limited, but preferably, the drain separator 41 of the storage device is directly above the drain tank storage portion 27 described above, or on this. The devices are arranged in the work machine room 10a so as to be arranged in close proximity, and the drain collected by the drain separator 41 is introduced into the drain tank 50 downward, in a short distance and linearly. Configure as you can.

  On the other hand, a muffler 8a, a tail pipe 8b, and the like constituting the exhaust system 8 of the engine are accommodated in the above-described exhaust chamber 10b.

  Furthermore, a communication port 14 that connects the work machine chamber 10a and the exhaust chamber 10b is formed in the partition wall 13 that divides the work machine chamber 10a and the exhaust chamber 10b, and is opposed to the communication port 14. A radiator 6 for exchanging heat of the cooling water that has cooled the engine 3 is arranged, and a cooling fan provided in the engine 3 is arranged toward the radiator 6, and when the cooling fan rotates to generate cooling air, After the air in 10a passes through the radiator 6 and is heat-exchanged with the cooling water in the radiator 6, it is introduced into the air exhaust chamber 10b and is passed through the air outlet 15 provided in the upper portion of the air exhaust chamber 10b. The soundproof box 10 is configured to be discharged outside.

  The drain tank 50 accommodated in the drain tank accommodating portion 27 provided in the frame 20 collects and stores the drain collected by the drain separator 41 accommodated in the work machine room 10a. When the drain collected in the tank exceeds a predetermined amount, it is allowed to overflow and be collected in the space S in the oil proof weir.

  In the present embodiment, the drain tank 50 is configured to include an inlet 51 that communicates with the drain separator 41 and an outlet 52 that communicates with the space S in the oil proof weir. 1 is formed in a sealed structure except for the two places of the inlet 51 and the outlet 52.

  As shown in FIG. 3, the drain pipe 42 communicating with the lower end of the drain separator 41 is communicated with the aforementioned inlet 51, and the oil proof weir is penetrated through the side wall 255 of the upper frame 25 with the aforementioned outlet 52. The other end of the overflow pipe 44 that opens at one end on the inner space S is communicated.

  In the illustrated embodiment, both the inlet 51 and the outlet 52 described above are opened in the top plate of the drain tank 50, but the inlet 51 and the outlet 52 are opened in the side wall of the drain tank 50. Alternatively, the outlet 52 may be an opening at the tip of a pipe projecting into the drain tank 50 through the outer wall of the drain tank 50. In this configuration, the outlet 52 is used as the drain tank. The drain recovery amount at which the overflow starts is determined depending on which position in the height direction 50 is opened.

  As described above, when the drain tank 50 is sealed except for the inlet 51 and the outlet 52 when the compressor 1 is mounted, the drain pipe 42, the drain pipe 42, When the drain is introduced into the drain tank 50 through the inlet 51 and the compressed gas, the drain is collected at the bottom of the drain tank 50, while the compressed gas is oil-proofed through the outlet 52 and the overflow pipe 44. It is discharged into the space S in the weir.

  Then, when the amount of drain recovered in the drain tank 50 increases and the liquid level in the drain tank 50 rises and the drain liquid level reaches the position where the outlet 52 is formed, the drain via the outlet 52 is drained. The overflow drain that has not been fully recovered in the drain tank 50 is recovered in the space S in the oil proof weir.

  Therefore, even when the drain collected in the drain tank 50 is neglected, the drain is overflowed into the space S in the oil proof weir and leaked outside the machine. By avoiding this, it is possible to prevent the periphery of the compressor 1 from being contaminated by the aftercool drain.

  In addition, with the above configuration, the drain tank 50 functions as an expansion chamber for expanding the introduced compressed gas in a state before the overflow starts, and the compression once expanded in the drain tank 50. Since the gas is discharged through the outlet 52 and the overflow pipe 44, the drain tank 50 can also function as a silencer (expansion chamber) for reducing the exhaust sound of the compressed gas.

  Further, even if the compressor 1 itself is tilted or shaken, the drain does not leak from the sealed drain tank 50, and even if a part of the drain leaks through the outlet 52. Since this drain is collected in the space S in the oil proof weir, when the compressor 1 is lifted by a crane with the drain remaining in the drain tank 50 and loaded on a truck or the like for transportation Even so, drain does not leak out of the machine.

  3 to 5, reference numeral 53 denotes a cap. By removing the cap 53, the drain port 54 can be opened, and the collected drain can be drained through the drain port 54. It is configured.

  The drain may be discharged by, for example, pumping out the collected drain through the drain port 54. However, in this embodiment, the drain tank 50 can be taken out from the drain tank housing portion 27. The drain tank 50 that has been taken out is transported to a drain disposal site so that it can be drained.

  In order to facilitate the removal of such a drain tank 50, in the present embodiment, a part of the drain pipe 42 and the overflow pipe 44 arranged in the drain tank accommodating portion 27 is connected to a male joint and a female joint. Are formed by hose joints 421 and 441 that are detachably combined, and the drain pipe 42 and the overflow pipe 44 can be divided into two at this position, so that when the drain tank 50 is taken out and attached, each pipe 42 , 44 can be easily attached and detached.

  As shown in FIG. 3, the side surface of the frame at the position where the drain tank accommodating portion 27 is formed is provided with an opening / closing door 28 so that the inlet of the drain tank accommodating portion 27 can be closed by this opening / closing door 28. The noise generated in the soundproof box 10 can be prevented from leaking outside the machine through this portion, and the presence of the drain tank 50 can be hidden from outside the machine, so that the appearance of the compressor 1 is improved.

  An elastic material such as elastic rubber 29 that is pressed against the side wall of the drain tank 50 when the open / close door 28 is closed is attached to the inner surface of the open / close door 28, and a door handle ( (Not shown) is provided so that the door 28 is engaged with or released from the frame 20 by the operation of the door handle, whereby the drain tank 50 is disposed in the drain tank housing portion 27 and then opened and closed. By simply closing the door 28, the drain tank 50 can be fixed so as not to move to a predetermined position in the drain tank accommodating portion 27 without bolting or the like.

  3 to 5 is a sliding material made of a plate material made of a material having a low coefficient of friction, such as a nylon plate, for example. By attaching to the floor surface (bottom plate 211 of the lower frame 21) of the drain tank housing portion 27 at a position in contact with the bottom surface, the drain tank 50 that has become heavy due to the collection of drain can be easily pulled out from the drain tank housing portion 27. I can do it.

  In the configuration shown in FIGS. 1 and 3, the configuration in which the lower portion of the drain separator 41 is communicated only with the drain tank 50 is shown. However, for example, as shown in FIGS. A drain cock 45, which is a switching valve, is attached to the provided outlet to branch the drain flow path in two directions, one of which is the drain pipe 42 communicating with the drain tank 50, and the other is directly connected to the outside of the machine. It may be configured as a drain discharge pipe 42 ′ that discharges, and may be configured so that it can be selected by switching the drain cock 45 through which path the drain is discharged.

  With this configuration, for example, when the drain in the drain tank 50 is frozen due to use in an extremely cold region and the drain cannot be collected, or the drain is collected due to clogging at the inlet or the outlet of the drain tank 50. If this is not possible, it may be possible to select to discharge the drain directly without collecting the drain.

  When the engine 3 of the engine-driven compressor provided with the aftercooler drain recovery part of the present invention described above is started and the compressor body 5 is driven, the compressor body 5 starts to compress the compressed gas.

  In this embodiment that employs an oil-cooled screw compressor as the compressor body 5, the compressor body 5 compresses the gas to be compressed together with the cooling oil. Compressed gas is discharged, and the compressed gas discharged together with the cooling oil is introduced into the receiver tank 7, and after the cooling oil is primarily separated in the receiver tank 7, the compressed gas is further introduced into the oil separator 9. The oil remaining in the compressed gas is secondarily separated.

  The compressed gas after the secondary separation of the cooling oil by the oil separator 9 is introduced into the aftercooler 40 and cooled, and the drain produced by the condensation of water vapor in the compressed gas is removed by the drain separator 41 during this cooling. Thereafter, the dried compressed gas from which the drain has been removed is supplied to the consuming side to which an air working device (not shown) is connected.

  The drain collected by the drain separator 41 is introduced into the drain tank 50 and collected together with the compressed gas via the drain pipe 42 communicating with the lower portion of the drain separator 41.

  On the other hand, the compressed gas introduced into the drain tank 50 together with the drain is discharged to the space S in the oil proof weir through the outlet 52 and the overflow pipe 44.

  Thus, in the aftercooler drain recovery part of the present invention, the compressed gas released together with the drain via the drain separator 41 expands when introduced into the drain tank 50, and then the space in the oil proof weir. Since it is discharged to S, the drain tank 50 also functions as a silencer (expansion chamber) that reduces the discharge sound of the compressed gas, so that the noise accompanying the discharge of the compressed gas is reduced.

  By continuing the operation of the compressor, drain gradually accumulates in the drain tank 50. In this way, the drain accumulated in the drain tank 50 is removed from the drain tank 50 before the overflow occurs. It is preferable to take out and discard more.

  For such drainage, the open / close door 28 covering the drain tank housing 27 is opened, the drain pipe 42 communicating between the drain tank 50 and the drain separator 41 is disconnected at the hose joint 421, and the drain tank 50 and the oilproof The overflow pipe 44 communicating with the space S in the weir is cut off at the hose joint 441, and in this state, the drain tank 50 is pulled out from the drain tank housing part 27.

  In the configuration of the present embodiment in which the sliding member 55 is attached on the bottom plate 211 at a position in contact with the bottom surface of the drain tank 50, even if the drain tank 50 becomes heavy by collecting drain, The drain tank 50 pulled out in this way is carried to the drain disposal position by gripping the handle 56 and the like, and the cap 53 is removed and the drain tank 54 is discharged.

  After draining the drain, the drain tank 50 closes the drain port 54 with the cap 53 and then is accommodated in the drain tank accommodating portion 27 again to connect the hose joints 421 and 441 of the drain pipe 42 and the overflow pipe 44. Thereafter, when the open / close door 28 is closed, the side surface of the drain tank 50 is pressed by the elastic rubber 29 for pressing provided on the open / close door 28, and the drain tank 50 is fixed at a predetermined position in the drain tank housing portion 27. , Installation of the drain tank 50 to the compressor 1 is completed.

  If the drain in the drain tank 50 accumulates to a predetermined amount or more by neglecting the above-described operation of discarding the drain accumulated in the drain tank 50, the drain accumulated in the drain tank 50 is connected to the outlet 52 and the overflow pipe 44. It is introduced into the space S in the oilproof weir and collected.

  In the illustrated embodiment in which the outlet 52 is opened in the top plate of the drain tank 50, the overflow 52 does not occur until the drain is fully accumulated up to the top plate position of the drain tank 50. By providing it at a predetermined height position on the side surface of the drain tank 50, it is possible to cause an overflow when the drain tank 50 is accumulated up to a predetermined amount before the drain tank 50 is full.

  In this way, even if the drain tank 50 is filled with drain due to neglecting to discard the drain collected in the drain tank 50, the overflowed drain will enter the space S in the oil proof weir. Since it is recovered and does not leak out of the machine, it is possible to provide a compressor with further consideration for the surrounding environment without being contaminated by the cooling oil mixed in the drain, etc. We were able to.

  The drain recovered in the space S in the oil proof weir can be discharged to a separately prepared tray by removing the plug 58 of the discharge port 57 provided at the bottom of the oil proof weir.

1 Compressor (Soundproof engine driven compressor)
3 Engine 4 Fuel tank 5 Compressor body 6 Radiator 7 Receiver tank 8 Exhaust system 8a Muffler 8b Tail pipe 9 Oil separator 10 Soundproof box 10a Work machine room 10b Exhaust chamber 13 Partition wall 14 Communication port 15 Air outlet 20 Frame 21 Below Frame 211 Bottom plate 211a One side in width direction (of bottom plate 211)
212 to 215 Side plate 25 Upper frame 251 Floor plate 252 Opening 255 Side wall 27 Drain tank accommodating portion 28 Open / close door 29 Elastic rubber 30 Bonnet 40 After cooler 41 Drain separator 42 Drain pipe 421 Hose joint 42 'Drain discharge pipe 44 Overflow pipe 441 Hose joint 50 Drain Tank 51 Inlet 52 Outlet 53 Cap 54 Drainage port 55 Sliding material 56 Handle 57 Drainage port 58 Plug

Claims (2)

A compressor body that compresses the gas to be compressed to generate a compressed gas, an aftercooler that cools the compressed gas generated by the compressor body, and separates and collects the drain from the compressed gas that has been cooled by the aftercooler. In a compressor including a drain separator as a component device and housing the component device in a soundproof box,
The soundproof box is formed by a frame that forms the bottom of the soundproof box and a bonnet that covers the frame,
An oil-proof weir formed in a box shape with a bottom is formed in the frame to prevent oil from leaking out of the machine by storing oil and / or fuel leaked from the component equipment,
A drain tank for collecting the drain collected by the drain separator is disposed in the soundproof box, and
The drain tank is provided with an outlet that overflows when the drain recovered in the drain tank exceeds a predetermined amount, and the drain discharged through the outlet can be introduced into the space inside the oil proof weir. Aftercooler drain recovery unit in a compressor characterized by the above.   2. The compressor according to claim 1, wherein the drain tank is provided with an inlet communicating with the drain separator, and the drain tank is sealed except for the inlet and the outlet when the compressor is mounted. Aftercool drain collection section.

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