JP5996450B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine having a connection device for connecting an engine and piping connected to the engine.

  Conventionally, in construction machines such as a hydraulic excavator equipped with a diesel engine (hereinafter simply referred to as an engine), an exhaust gas treatment device is installed in the exhaust system of the engine, and exhaust gas from the engine is provided downstream of the exhaust pipe. In addition, suspended particulate matter (PM), nitrogen oxides (NOx), and the like are removed by the exhaust gas processing apparatus and then released into the atmosphere.

  Conventionally, this exhaust gas treatment device has been configured to be integrally attached to an engine. Further, as shown in FIGS. 5 and 6 of Patent Document 1, the diesel particulate filter (DPF) and the selective reduction catalyst (SCR) constituting the exhaust gas treatment device are separated and each is attached to the engine in parallel. Things were also done.

JP 2009-184558 A

  However, in recent years, higher-order exhaust gas regulations have been demanded, and the exhaust gas processing devices (DPF and SCR) tend to be larger and heavier in order to comply with these higher-order exhaust gas regulations. When the exhaust gas processing device becomes larger and heavier, it is difficult to support it in the engine. For this reason, the structure which supports an exhaust-gas processing apparatus in the house frame provided in the turning body is proposed.

  By the way, the engine and the exhaust gas treatment device are connected using an exhaust gas pipe. In the configuration in which the exhaust gas processing device is integrally attached to the engine as in the prior art, an assembly error that occurs when connecting the exhaust gas pipe attached to the engine to the exhaust gas processing device is small.

  However, when the exhaust gas treatment device is attached to the house frame, the engine and the exhaust gas treatment device are completely separated from each other, so that an assembly error that occurs when the exhaust gas pipe is connected to the exhaust gas treatment device becomes large. End up.

  Further, if the exhaust gas pipe is attached to the exhaust gas processing apparatus with this assembly error, the vibration of the engine and the vibration of the house frame are different, so that stress may be generated at the attachment position.

  The present invention has been made in view of the above points, and there is provided a construction machine capable of suppressing the occurrence of assembly errors and leakage of exhaust gas at the connection position of the exhaust gas pipe even when the exhaust gas processing device is provided in the house frame. The purpose is to provide.

From the first point of view, the above problem is
A lower traveling body,
An upper revolving unit mounted on the lower traveling unit so as to be able to swivel;
An exhaust gas treatment device for treating exhaust gas discharged from the engine;
A house frame that supports the exhaust gas treatment device installed on the revolving frame of the upper revolving structure;
A first pipe having one end connected to one of the engine and the exhaust gas processing device; and a second pipe having one end connected to the other of the engine or the exhaust gas processing device. A connection device to connect,
The engine is supported on a top of an engine mounting seat disposed on the revolving frame via a mount;
The connecting device is
Provided at the other end of the first pipe, and provided with a first flange through which a fastening member is inserted, and at the other end of the second pipe, and at the fastening A second flange formed with a second hole through which the member is inserted,
The diameter of the first hole and the diameter of the second hole are the same or different ;
Of the first pipe and the second pipe, the inner diameter of the pipe located downstream with respect to the flow direction of the exhaust gas is made larger than the inner diameter of the pipe located upstream.
The diameter of the first flange is different from the diameter of the second flange;
Of the first flange and the second flange, the diameter of the flange located upstream with respect to the flow direction of the exhaust gas is made larger than the diameter of the flange located downstream.
It can be solved by a construction machine characterized by the above.

  According to the disclosed invention, an assembly error can be absorbed between the first flange and the second flange of the connection device, so that an assembly error or exhaust gas leakage occurs at the connection position of the exhaust gas pipe. This can be suppressed.

FIG. 1 is a side view of a construction machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of an engine room of a construction machine according to an embodiment of the present invention. FIG. 3 is a partially enlarged perspective view of the engine room of the construction machine according to the embodiment of the present invention. FIG. 4 is a perspective view showing a house frame disposed on a construction machine according to an embodiment of the present invention. FIG. 5 is a side view showing a house frame disposed on a construction machine according to an embodiment of the present invention. FIG. 6 is a front view showing a house frame disposed in a construction machine according to an embodiment of the present invention. FIG. 7 is a cross-sectional view showing a connection device disposed in a construction machine according to an embodiment of the present invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a construction machine according to an embodiment of the present invention. In the present embodiment, a hydraulic excavator 1 will be described as an example of a construction machine.

  The hydraulic excavator 1 is roughly constituted by a crawler-type lower traveling body 2 that can be self-propelled and an upper revolving body 3 that is rotatably mounted on the lower traveling body 2. A work attachment 4 is provided on the front side of the upper swing body 3.

  The work attachment 4 includes a boom 6, an arm 9, a bucket 10, and the like. The boom 6 is attached to a turning frame 5 described later so as to be able to move up and down. The arm 9 is rotatably attached to the tip end side of the boom 6. Moreover, the bucket 10 is attached to the front end side of the arm 9 so that rotation is possible.

  The boom cylinder 12 is disposed between the turning frame 5 and the boom 6. The boom 6 moves up and down with respect to the revolving frame 5 by the boom cylinder 12. The arm cylinder 13 is disposed between the boom 6 and the arm 9. The arm 9 rotates with respect to the boom 6 by the arm cylinder 13. Further, the bucket cylinder 14 is disposed between the bucket 10 and the arm 9. The bucket 10 is rotated with respect to the arm 9 by the bucket cylinder 14.

  The upper revolving unit 3 is installed on the lower traveling unit 2 through a revolving mechanism 16 so as to be able to revolve. As shown in FIG. 2 in addition to FIG. 1, the upper swing body 3 includes a swing frame 5, a cab 8, a counterweight 15, an exterior cover (exterior body) 18, an engine hood 17 a, an engine 20, a heat exchange device 24, An exhaust gas treatment device 30, a house frame 35, connection devices 50A and 50B, and the like are disposed.

  The cab 8 is provided on the revolving frame 5, and a driver's seat (not shown) is provided therein. The operator sits on the driver's seat in the cab 8 and operates the hydraulic excavator 1.

  The counterweight 15 has a function of balancing the weight with the work attachment 4. The exterior cover 18 and the engine hood 17a cover the engine 20, the heat exchange device 24, the exhaust gas processing device 30 and the like disposed in the engine chamber 17.

  Next, the configuration inside the engine chamber 17 will be described.

  FIG. 2 is a schematic configuration diagram showing the internal configuration of the engine chamber 17, and FIG. 3 is an enlarged perspective view showing the vicinity of the engine 20 in the engine chamber 17.

  In the engine chamber 17, an engine 20, a heat exchange device 24, an exhaust gas processing device 30, a house frame 35, and the like are disposed.

  The engine 20 is supported on an upper part of an engine mounting seat 21 disposed on the revolving frame 5 via a mount 22. The mount 22 is an anti-vibration mount and prevents vibration generated by the engine 20 from being transmitted to the turning frame 5.

  A cooling fan 23 is disposed on the X1 direction side (left side in the figure) of the engine 20. A heat exchange device 24 is disposed on the X1 direction side of the cooling fan 23.

  The cooling fan 23 is rotationally driven by the engine 20. When the cooling fan 23 is driven to rotate, outside air is taken into the engine chamber 17 as cooling air 39. The heat exchange device 24 performs heat exchange processing with the cooling air 39 taken into the engine chamber 17.

  The cooling air 39 flows in the right direction in the figure as indicated by an arrow in FIG. Therefore, the arrow X1 direction side in the figure is the cooling air upstream side, and the arrow X2 direction in the figure is the cooling air downstream side.

  The heat exchanging device 24 is supplied to an oil cooler and an engine for dissipating hydraulic fluid from hydraulic equipment such as a radiator that cools cooling water flowing in the engine 20, a boom cylinder 12, an arm cylinder 13, and a bucket cylinder 14. A radiator unit 24A provided with an intercooler for cooling the supercharged air, a fuel cooler 24B for cooling excess fuel returning to a fuel tank (not shown), and a condenser 24C for an air conditioner are provided. .

  The cooling water, hydraulic oil, supercharged air, surplus fuel, and the like are cooled by the cooling air 39. Therefore, the temperature of the cooling air 39 rises as it passes through the heat exchange device 24.

  A hydraulic pump 27 is integrally attached to the X2 direction side of the engine 20. The hydraulic pump 27 is a hydraulic source such as the boom cylinder 12, the arm cylinder 13, and the bucket cylinder 14 that drive the work attachment 4. This hydraulic pump 27 is also driven by the engine 20.

  Exhaust gas discharged from the engine 20 is purified by the exhaust gas processing device 30. The exhaust gas discharged from the engine 20 may contain harmful substances such as nitrogen oxides (NOx), and an exhaust gas processing device 30 is connected to the engine 20 to purify them.

  The exhaust gas treatment device 30 includes a diesel particulate filter 31 (hereinafter referred to as DPF) that collects particulate matter (PM) contained in exhaust gas, and selective reduction that reduces and removes nitrogen oxides (NOx). A selective reduction type catalyst 32 (hereinafter referred to as SCR) or the like for reducing and removing using an agent (for example, urea or the like) is provided. Further, the DPF 31 includes a front-stage oxidation catalyst on the upstream side, and the SCR 32 includes a rear-stage oxidation catalyst on the downstream side. The DPF 31 may be an oxidation catalyst-carrying filter (CSF).

  The exhaust gas treatment device 30 and the house frame 35 that supports the exhaust gas treatment device 30 are shown in FIGS. 4 to 6 in addition to FIG.

  Since the exhaust gas treatment device 30 purifies the exhaust gas exhausted from the engine 20 as described above, the exhaust gas treatment device 30 is disposed in the vicinity of the engine 20. Further, since the heat exchanging device 24 is disposed on the upstream side of the engine 20 with respect to the flow direction of the cooling air 39, the exhaust gas processing device 30 is disposed downstream of the engine 20 with respect to the flow direction of the cooling air 39 (X2 (Direction side).

  In addition, as described above, in recent years, higher-order exhaust gas regulations have been demanded, and the DPF 31 and the SCR 32 constituting the exhaust gas treatment device 30 have become larger and heavier in order to comply with these higher-order exhaust gas regulations. For this reason, it is difficult to attach the exhaust gas treatment device 30 to the engine 20 as in the prior art. Therefore, in this embodiment, the exhaust gas treatment device 30 is attached to the house frame 35 and supported by the house frame 35.

  Further, when the DPF 31 and the SCR 32 constituting the exhaust gas processing device 30 are arranged in a line, the length becomes longer than the engine width, and the engine chamber 17 cannot be made compact. For this reason, in this embodiment, the DPF 31 and the SCR 32 are separated, and the DPF 31 and the SCR 32 are arranged side by side so as to be substantially parallel.

  The exhaust gas discharged from the engine 20 is introduced into the DPF 31 via the exhaust gas pipe 29 and subjected to the first stage purification process, and then sent to the SCR 32 via a pipe (not shown) to perform the second stage purification process. And then discharged to the outside of the aircraft through the exhaust pipe 41 and the tail pipe 25. An engine hood 17 a is provided on the upper part of the engine 20 and the exhaust gas treatment device 30.

  The house frame 35 has a function of supporting the exhaust gas processing device 30 as described above. The house frame 35 is provided on the revolving frame 5. Further, the position of the house frame 35 is set on the downstream side (X2 direction side) of the engine 20 with respect to the flow direction of the cooling air 39.

  The house frame 35 includes a frame main body 36 and a support body 37. The lower part of the frame body 36 is fixed to the revolving frame 5. In addition, hydraulic parts connected to the hydraulic pump 27 are disposed inside the frame body 36. Therefore, the frame main body 36 is provided with a firewall 42 for shielding these hydraulic components and the engine 20.

  The support 37 is disposed on the upper portion of the frame body 36. The support 37 has a box shape as shown in FIGS. 3, 4, and 6. The DPF 31 constituting the exhaust gas processing device 30 is attached to the side portion of the support body 37. The DPF 31 is attached to the upper part of the support body 37.

  Thus, the exhaust gas processing device 30 is separated from the engine 20 by attaching the exhaust gas processing device 30 to the house frame 35. The exhaust gas treatment device 30 is configured to be mounted on the revolving frame 5 via the house frame 35.

  Here, the first connection device 50A and the second connection device 50B attached to the exhaust gas pipe 29 will be described in more detail.

  As described above, the engine 20 and the exhaust gas treatment device 30 are connected by the exhaust gas pipe 29. The exhaust gas pipe 29 extends from the engine 20 to the side of the DPF 31 on the Y1 side, further extends along the side of the DPF 31, extends substantially parallel to the DPF 31, and then connected to the DPF 31. It has been configured.

By the way, in the present embodiment, the exhaust gas treatment device 30 is attached to a house frame 35 provided in the revolving frame 5. On the other hand, the engine 20 is attached to an upper portion of an engine mounting seat 21 disposed on the revolving frame 5 via a prevention mount 22 for preventing engine vibration from being transmitted to the revolving frame 5.

  When the exhaust gas processing device 30 is attached to the house frame 35 as described above, the engine 20 and the exhaust gas processing device 30 are completely separated from each other. Therefore, when the exhaust gas pipe 29 is connected to the exhaust gas processing device 30. As described above, the assembly error may increase.

  Therefore, in the present embodiment, the first connecting device 50A and the second connecting device 50B absorb the assembly error when the exhaust gas pipe 29 is connected to the exhaust gas processing device 30.

  Hereinafter, specific configurations of the first connection device 50A and the second connection device 50B will be described with reference to FIG. Since the first connection device 50A and the second connection device 50B have the same configuration, the first and second connection devices 50A and 50B are collectively referred to as the connection device 50 and described. To do.

  FIG. 7 is a cross-sectional view of the connection device 50. The connection device 50 includes a first flange 52 and a second flange 53. The first flange 52 and the second flange 53 are fastened by a fastening member constituted by a fastening bolt 60 and a fastening nut 61, whereby the first flange 52 and the second flange 53 are connected.

  The first flange 52 is connected to an end portion of an exhaust gas pipe 29 on the side close to the engine 20 (hereinafter referred to as an engine side pipe 29A). The second flange 53 is connected to an end of an exhaust gas pipe 29 (hereinafter, a processing apparatus pipe 29B) on the side close to the exhaust gas processing apparatus 30.

  The first flange 52 has a circular shape in plan view (as viewed from the direction indicated by the arrow S in FIG. 7). The first flange 52 has a plurality of first bolt holes 55 through which the fastening bolts 60 are inserted. Furthermore, the engine side pipe 29A connected to the first flange 52 has a first flow path hole 58 through which exhaust gas flows.

  Similarly, the second flange 53 has a circular shape in plan view. The second flange 53 has a plurality of second bolt holes 56 through which the fastening bolts 60 are inserted. The formation position of the second bolt hole 56 is configured to correspond to the formation position of the first bolt hole 55 formed in the first flange 52. Furthermore, the processing apparatus pipe 29B connected to the second flange 53 has a second flow path hole 59 through which exhaust gas flows.

Here, the diameter of the first flange 52 and _{L F1,} the first flow path hole 58 of a diameter of the first bolt hole 55 formed in the first flange 52 and _{L B1,} further engine-side pipe 29A Let L _P1 be the inner diameter of the _plate . Further, the diameter of the second flange 53 and _{L F2,} the second flow path hole 59 of a diameter of the second bolt holes 56 formed in the second flange 53 and _{L B2,} further processor pipeline 29B The inner diameter is L _P2 .

First, paying attention to the first bolt hole 55 and the second bolt hole 56, in this embodiment, the diameter L _{B1 of} the first bolt hole 55 formed in the first flange 52 and the second flange 53 The diameter L _B2 of the formed second bolt hole 56 is set to be larger than the diameter of the screw portion 60a of the fastening bolt 60 (hereinafter referred to as a bolt outer diameter L _BB ) (L _B1 > L _BB , L _B2 > L _BB ).

Further, the diameter _{L B1} in the first bolt hole 55 diameter _{L B2} of the second bolt hole 56 is set different from _{(L B1} ≠ _L B2). Specifically, the diameter L _B1 of the first bolt hole 55 is set larger than the diameter L _{B2 of} the second bolt hole 56 (L _B1 > L _B2 ). Also as described above, the diameter L _B2 of a first diameter L _B1 and second bolt hole 55 of the bolt hole 56 is set larger than the bolt outside diameter L _BB.

For this reason, when the fastening bolt 60 is inserted through the first and second bolt holes 55 and 56, a difference in diameter between the diameter L _{B1 of} the first bolt hole 55 and the outer diameter L _{BB of} the first bolt hole 55 with respect to the bolt 60. The first flange 52 can be moved. Similarly, the second flange 53 can be moved with respect to the bolt 60 by the difference in diameter between the diameter L _{B2 of} the second bolt hole 56 and the outer diameter L _BB of the bolt.

  As a result, even when there is an assembly error between the engine side pipe 29A and the processing apparatus pipe 29B when the first flange 52 and the second flange 53 are connected, this error will be reduced to the first flange 52 and the second flange 53. It is possible to absorb by moving the second flange 53 relatively.

In particular, in the case of the present embodiment, the diameter L _B1 of the first bolt hole 55 is set larger than the diameter L _{B2 of} the second bolt hole 56 (L _B1 > L _B2 ). For this reason, the movable amount of the first flange 52 with respect to the fastening bolt 60 is larger than the movable amount of the second flange 53 with respect to the fastening bolt 60. Therefore, in the configuration of the present embodiment, the assembly error can be greatly absorbed by the movement of the first flange 52.

Although not shown, the diameter L _B1 of the first bolt hole 55 can be set smaller than the diameter L _B2 of the second bolt hole 56 (L _B1 <L _B2 ). In this case, the movable amount of the second flange 53 with respect to the fastening bolt 60 is larger than the moving amount of the first flange 52 with respect to the fastening bolt 60.

Furthermore, it is possible to set equal to the diameter _{L B1} in the first bolt hole 55 and the diameter _{L B2} of the second bolt holes _{56 (L B1 = L B2)} . In this configuration, the movable amount of the first flange 52 relative to the fastening bolt 60 and the movable amount of the second flange 53 relative to the fastening bolt 60 are equal.

Thus, it is possible to set the diameter L _B1 and diameter L _B2 of the second bolt holes 56 of the first bolt holes 55 for fastening bolts 60 as appropriate, thereby having the flexibility to absorb the assembly error Can be done.

  Moreover, since the connection apparatus 50 which concerns on this embodiment connects the 1st flange 52 and the 2nd flange 53 in the state without an assembly error as mentioned above, it suppresses that a stress generate | occur | produces in a connection position. be able to.

  As described above, in the present embodiment, the engine 20 is attached to the revolving frame 5 via the engine mounting seat 21 having the mount 22, so that engine vibration is not transmitted to the revolving frame 5. Therefore, the exhaust gas treatment device 30 attached to the house frame 35 and the engine 20 constitute a different vibration system.

  However, since there is no assembly error at the connection position between the first flange 52 and the second flange 53 as described above, even if the vibration system between the engine 20 and the exhaust gas treatment device 30 is different, stress is not generated at the connection position. Therefore, the exhaust gas does not leak in the connecting device 50.

Attention is now directed to the inner diameter _{L P1} of the first channel hole 58 on the inner diameter _{L P2} of the second flow path hole 59. In the present embodiment, the inner diameter L _{P1 of} the first flow path hole 58 formed in the engine side pipe 29A that is a pipe close to the engine 20 is a pipe close to the exhaust gas processing device 30 (that is, downstream of the exhaust gas flow). Is set smaller than the inner diameter L _{P2 of the} pipes arranged on the side (L _P1 <L _P2 ).

Further, the difference in diameter (| L _P1 −L _P2 |) between the first channel hole 58 and the second channel hole 59 is the difference in diameter between the first bolt hole 55 and the second bolt hole 56 ( It is set larger than | L _B1 −L _B2 |) (| L _P1 −L _P2 |> | L _B1 −L _B2 |).

  Therefore, in order to absorb the assembly error, even if the fastening bolt moves within the range of the diameter difference between the first bolt hole 55 and the second bolt hole 56 as described above, the first flow path hole 58 is always in the first position. The two channel holes 59 face each other. Thereby, when exhaust gas flows toward the processing apparatus piping 29B from the engine side piping 29A, it can prevent that a pressure loss generate | occur | produces in the connection apparatus 50. FIG.

Next, attention is focused on the diameter L _F1 of the first flange 52 and the diameter L _F2 of the second flange 53. In the present embodiment, the diameter L _F1 of the first flange 52 and the diameter L _F2 of the second flange 53 are different (L _F1 ≠ L _F2 ). Specifically, the diameter L _F1 of the first flange 52 is set larger than the diameter L _F2 of the second flange 53 (L _F1 > L _F2 ).

Further, the difference in diameter between the first flange 52 and the second flange 53 (| L _F1 −L _F2 |) is the difference in diameter between the first bolt hole 55 and the second bolt hole 56 (| L _B1 − It is set larger than L _B2 |) (| L _F1 −L _F2 |> | L _B1 −L _B2 |).

  Therefore, even if the first flange 52 and the second flange 53 are relatively moved in order to absorb assembly errors, the second flange 53 is positioned inside the first flange 52, No one flange 52 sticks out. Therefore, even if the first and second flanges 52 and 53 are relatively movable to absorb assembly errors, the appearance can be improved.

  As shown in FIGS. 3 and 6, two connection devices 50 are preferably provided for the exhaust gas pipe 29. In the present embodiment, the first connection device 50A is arranged in the exhaust gas pipe 29 extending in the Y1 and Y2 directions, and the second connection device 50B is arranged in the exhaust gas pipe 29 extending in the X1 and X2 directions. The configuration is set up.

  With this configuration, the first connecting device 50A can absorb the assembly error generated in the plane direction including the arrows X1 and X2 and the arrows Z1 and Z2, and the second connecting device 50B Assembly errors occurring with respect to the plane direction including the arrows Y1, Y2 and the arrows Z1, Z2 can be absorbed. Therefore, even if an assembly error occurs in any direction, it is possible to reliably absorb this.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

In the embodiment described above, both the diameter LB2 first diameter LB1 of bolt holes 55 and the second bolt holes 56 showed greater example than the bolt outside diameter L _BB of the fastening bolts 60. However, either one of the first bolt hole 55 and the second bolt hole 56 is a screw hole that is screwed with the screw portion 60a, and the diameter of the other bolt hole is larger than the bolt outer diameter _LBB. It is also possible.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Upper turning body 4 Attachment 5 Turning frame 17 Engine chamber 17a Engine hood 18 Exterior cover 19 Turning frame 20 Engine 23 Cooling fan 24 Heat exchange device 27 Hydraulic pump 29 Exhaust gas piping 29A Engine side piping 29B Processing Equipment piping 30 Exhaust gas treatment equipment 31 DPF
32 SCR
35 House frame 36 Frame body 37 Support body 38 Air guide path 39 Cooling air 40 Partition plate 42 Firewall 50 Connection device 50A First connection device 50B Second connection device 52 First flange 53 Second flange 55 First Bolt hole 56 second bolt hole 58 first channel hole 59 second channel hole 60 fastening bolt

Claims (2)

A lower traveling body,
An upper revolving unit mounted on the lower traveling unit so as to be able to swivel;
An exhaust gas treatment device for treating exhaust gas discharged from the engine;
A house frame that supports the exhaust gas treatment device installed on the revolving frame of the upper revolving structure;
A first pipe having one end connected to one of the engine and the exhaust gas processing device; and a second pipe having one end connected to the other of the engine or the exhaust gas processing device. A connection device to connect,
The engine is supported on a top of an engine mounting seat disposed on the revolving frame via a mount;
The connecting device is
Provided at the other end of the first pipe, and provided with a first flange through which a fastening member is inserted, and at the other end of the second pipe, and at the fastening A second flange formed with a second hole through which the member is inserted,
The diameter of the first hole and the diameter of the second hole are the same or different ;
Of the first pipe and the second pipe, the inner diameter of the pipe located downstream with respect to the flow direction of the exhaust gas is made larger than the inner diameter of the pipe located upstream.
The diameter of the first flange is different from the diameter of the second flange;
Of the first flange and the second flange, the diameter of the flange located upstream with respect to the flow direction of the exhaust gas is made larger than the diameter of the flange located downstream.
Construction machine characterized by. The exhaust gas processing device includes a first exhaust gas processing unit and a second exhaust gas processing unit, and the first exhaust gas processing unit and the second exhaust gas processing unit are arranged in parallel with the house frame. The construction machine according to claim 1, wherein

Images