JP2012091084A - Self-travelling recycling machine - Google Patents

Abstract

A self-propelled recycling machine capable of suppressing a temperature rise of a liquid reducing agent in a liquid reducing agent tank is provided.
A liquid reductant tank mounting portion 17 is located upstream of a diesel engine 12 of cooling air generated by a cooling fan 12a provided in the diesel engine 12 and below the machine room 4 and in the lateral width. The space in the machine room 4 and the liquid reductant tank mounting portion 17 are provided so that at least a part of the cooling air flowing toward the diesel engine 12 passes through the space for mounting the liquid reductant tank 20. The cooling air that passes through the periphery of the liquid reducing agent tank 20 promotes heat dissipation of the liquid reducing agent tank 20.
[Selection] Figure 2

Description

  The present invention relates to a self-propelled recycling machine equipped with an engine having a NOx reduction catalyst.

  In recent years, various techniques for detoxifying NOx contained in exhaust gas of a diesel engine have been developed. For example, a NOx reduction catalyst is provided in an exhaust gas flow path and a reducing agent for promoting a reduction reaction is supplied. As a result, there are some which make NOx in the exhaust gas harmless. Nitrogen compounds, carbon monoxide, and the like are used as a reducing agent for the NOx reduction catalyst. Recently, a technique using urea water (urea aqueous solution) as a reducing agent has attracted attention.

  As a conventional technique using a urea aqueous solution as a reducing agent in this way, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2003-20936) discloses a liquid in a vehicle or machine using an NOx reduction catalyst-equipped engine that uses a liquid reducing agent. An arrangement is known in which a liquid reducing agent tank for storing a reducing agent is disposed at a location where heat can be kept in a vehicle or a machine.

JP 2003-20936 A

  In the prior art described in Patent Document 1, the liquid reductant tank frozen by the heat generated by the liquid reductant tank is disposed near the portion where the liquid reductant tank can be kept warm, that is, near the engine or motor. Thaw or keep warm.

  However, the operating environment of a self-propelled recycling machine equipped with an engine having a NOx reduction catalyst is not limited to a cold climate in which the liquid reducing agent freezes. In a warm operating environment, the liquid reducing agent tank There is a possibility that the liquid reducing agent in the inside is overheated and deteriorated, or gas is generated from the liquid reducing agent.

  The present invention has been made in view of the above, and an object of the present invention is to provide a self-propelled recycling machine capable of suppressing the temperature rise of the liquid reducing agent in the liquid reducing agent tank.

  (1) In order to achieve the above object, the present invention relates to a crawler-type left traveling device and a right traveling device that are paired in parallel, a left traveling frame that forms a skeleton of the left traveling device, and a right traveling device. A main body frame coupled above a right traveling frame forming a skeleton, a processing device installed on the main body frame, and inserted between the left traveling frame and the right traveling frame in the front-rear direction and discharged from the processing device; An unloading conveyor for unloading the processed material, an engine having a NOx reduction catalyst that is installed horizontally on the main body frame so as to extend a drive shaft in the left-right direction, and a mounting device including the engine A machine room formed on the main body frame by an exterior cover for covering the main body frame, and a liquid reducing agent tank containing a liquid reducing agent used for the NOx reduction catalyst. In the type recycle machine, the liquid reducing agent tank is upstream of the engine of cooling air generated by a cooling fan provided in the engine and below the machine room and inside the left and right width. It is assumed that the liquid reducing agent tank mounting portion formed continuously with the space in the machine room is provided.

  Thus, the liquid reducing agent tank mounting part is formed continuously with the space in the machine room, and at least part of the cooling air flowing toward the engine around the liquid reducing agent tank mounted in the liquid reducing agent tank mounting part Therefore, heat radiation of the liquid reducing agent tank is promoted by the cooling air, and an increase in the temperature of the liquid reducing agent in the liquid reducing agent tank can be suppressed.

  (2) In the above (1), preferably, the liquid reducing agent tank mounting portion is arranged so that at least a part thereof overlaps with the engine in a vertical direction in a side view.

  (3) In the above (1), preferably, the liquid reducing agent tank mounting portion is provided above a region where the ground passes relative to the fuselage when the transport vehicle is raised and lowered. To do.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature rise of the liquid reducing agent in a liquid reducing agent tank can be suppressed.

It is a side view which shows the whole structure of the self-propelled crusher which concerns on one embodiment of this invention. It is sectional drawing seen from the arrow II-II direction in the self-propelled crusher shown in FIG. It is an enlarged view which shows the liquid reducing agent tank mounting part vicinity of the self-propelled crusher shown in FIG. It is an enlarged view which removes and shows the cover of the machine room of the self-propelled crusher shown in FIG. 1, and the door of a liquid reducing agent tank mounting part. It is a figure which shows the mode at the time of raising / lowering with respect to the trailer of a self-propelled crusher.

  Hereinafter, a self-propelled crusher will be described as an example of a self-propelled recycling machine according to an embodiment of the present invention and will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing an overall configuration of a self-propelled crusher that is a self-propelled recycling machine according to the present embodiment, and FIG. 2 is an arrow II-II in the self-propelled crusher shown in FIG. It is sectional drawing seen from the direction. In addition, below, let the direction corresponding to right and left in FIG. 1 be the front and back of a self-propelled crusher.

  In FIG. 1, a self-propelled crusher 100 as a self-propelled recycling machine according to an embodiment of the present invention includes a traveling body 1, a hopper (input hopper) 2, a grizzly feeder (not shown), A crushing device 3, a machine room 4, and a discharge conveyor 5 are roughly provided. As described above, the discharge side of the discharge conveyor 5 is referred to as the front, and the hopper 2 side is referred to as the rear.

  The traveling body 2 is configured by hanging a footwear 7 around each of a pair of left and right traveling frames 6. A driven wheel (not shown) and a drive wheel 8 are provided at the end of the traveling frame 6. A pair of connecting frames 9 (9a, 9b) (see FIG. 2) is connected to each of the pair of traveling frames 6. A main body frame 10 is attached above the pair of connecting frames 9. Horizontal members 10a and 10b arranged so as to extend in the length direction of the main body frame 10 are attached above the connection frames 9a and 9b, respectively. The horizontal members 10 a and 10 b constitute a part of the main body frame 10.

  The hopper 2 receives a material to be crushed and expands upward. The hopper 2 is disposed on the main body frame 10 via the support member 11. Although not shown, a grizzly feeder (not shown) that conveys the object to be crushed received by the hopper 2 to the crushing device 3 is provided below the hopper 2, and inside the feeder is a feeder. A plurality of grizzly rivers that convey the object to be crushed toward the crushing device 3 using vibrations applied by a vibrator such as a hydraulic motor are housed. The grizzly bar is provided with a plurality of combs arranged in the width direction of the main body frame 10, and the fine particles dropped from the comb teeth are screened out by smashing objects to be crushed (fine grains (so-called slur)) smaller than the interval between the combs. Etc. are guided onto the discharge conveyor 5 via a chute provided below the grizzly river.

  The crushing device 3 crushes the object to be crushed in the hopper 2, is located in front of and below the hopper 2, and is mounted near the longitudinal center of the main body frame 10. As the crushing device 3, for example, a crushing chamber is formed by fixed teeth and oscillating moving teeth, and a material to be crushed introduced into the crushing chamber is crushed so as to be crushed by the fixed teeth and moving teeth. And a jaw crusher in a form of discharging from the discharge port.

  The machine room 4 is provided so as to be positioned on the main body frame 10 further forward than the crushing device 3, and is formed so as to separate the internal space from the outside by an exterior cover 40 that covers the outside. In the internal space of the machine room 4, a hydraulic pump (not shown) as a hydraulic source that drives each hydraulic actuator provided in the traveling body 1, the hopper 2, the crushing device 3, and the diesel that drives them. An engine 12 and the like are incorporated. The diesel engine 12 is disposed horizontally so that the drive shaft extends in the left-right direction of the airframe.

  The diesel engine 12 is provided with an exhaust pipe 19. The exhaust pipe 19 is disposed toward an exhaust hole provided in the exterior cover 40 on the upper surface portion of the diesel engine 12 in the machine room 4, and exhaust gas from the diesel engine 12 is discharged above the machine room 4. is doing. A NOx reduction catalyst 19a for detoxifying NOx contained in the exhaust gas is provided in the exhaust pipe 19, and the exhaust gas added with the reducing agent is passed through the NOx reduction catalyst 19a, so that the exhaust gas NOx is reduced and detoxified. In the present embodiment, urea is used as the reducing agent, and an NOx reduction catalyst 19a is passed through the NOx reduction catalyst 19a while injecting an aqueous solution of urea (urea aqueous solution) stored in a liquid reducing agent tank 20 described later into the exhaust gas. It is detoxified by reducing to N2 (nitrogen gas) and H2O (water vapor).

  An operation panel 16 on which a key switch, an engine control dial, or an operation control switch for the crushing device 3 is disposed is provided below the main body frame 10 above the front side of the traveling body 1.

  The operator places the crushing device 3 or the like at a position where the crushing device 3 or the like is provided and adjacent to the rear side of the operation panel 16, that is, above the traveling body 1 at the side surface near the center in the front-rear direction of the machine body. A maintenance ladder 14 is provided for accessing the access point. A maintenance ladder 15 for an operator to access the machine room 4 is provided at a position adjacent to the front side of the traveling body 1 and the operation panel 16 and below the machine room 4. A liquid reductant tank 20 for storing a liquid reductant used in the NOx reduction catalyst 19a (in this embodiment, an aqueous urea solution) is located below the machine room 4 and adjacent to the front side of the maintenance ladder 15. Is provided with a liquid reducing agent tank mounting portion 17.

  The discharge conveyor 5 conveys the crushed material discharged from the crushing device 3 to the front of the machine body by a conveyor belt 13 (see FIG. 2) housed in the frame and discharges the crushed material to the outside of the machine. The discharge conveyor 5 is provided below the crushing device 3 so as to pass between the pair of traveling frames 1 and below the machine room 4, and from there to a height similar to that of the upper ends of the hopper 2 and the machine room 4. It is formed ascending to rise diagonally toward the front of the aircraft. The conveyor belt 13 is wound around driven wheels and drive wheels (both not shown) provided at both ends of the discharge conveyor 5 in the front-rear direction, and is circulated by the drive wheels to convey crushed material to the front side of the machine body. To do. In addition, as shown in FIG. 5, the rising slope of the discharge conveyor 5 does not contact the ground when the self-propelled crusher moves up and down with respect to the transport vehicle (for example, a trailer) (when the road plate is climbing up and down). Similarly, the liquid reducing agent tank mounting portion 17 is also provided above a region through which the ground passes relative to the airframe when the transport vehicle is raised and lowered. Thereby, since interference with the ground or the like is prevented, the loading operation can be easily performed.

  3 is an enlarged view showing the vicinity of the liquid reducing agent tank mounting portion 17 of the self-propelled crusher 100 shown in FIG. 1, and FIG. 4 is a left side portion of the exterior cover 40 of the machine room 4 and the liquid reducing agent tank mounting portion. It is an enlarged view which removes and shows 17 doors.

  As shown in FIGS. 2 and 4, in the machine room 4, in addition to the hydraulic pump and the diesel engine 12, a plurality of heat exchangers, that is, an oil cooler 18a, a radiator 18b, and an intercooler 18c (hereinafter referred to as heat exchange). Are also arranged side by side in the front-rear direction. The internal space of the machine room 4 is partitioned by the heat exchanger group 18, and a cooling fan 12 a provided in the diesel engine 12 located in one space is disposed to face the heat exchanger group 18. . The cooling fan 12a is rotated by power transmitted from a diesel engine 12 or the like by a mechanism (not shown), and the heat exchanger group 18 side (left side of the fuselage) is upstream with respect to the cooling fan 12a, and the diesel engine 12 side (right side of the fuselage). ) Is generated downstream (hereinafter also referred to as cooling air). The exterior cover 40 on the upper left side of the machine room 4 is formed with an intake port 40a, and an exhaust port (not shown) is formed on the right side and the upper right side. Flows as cooling air in this order from the air inlet 40a to the heat exchanger group 18, the cooling fan 12a, the diesel engine 12 and the outside of the machine room 4 through the exhaust port, thereby causing the heat exchanger group 18 and the diesel engine 12 to flow. Promotes heat dissipation. In FIG. 2, the flow of cooling air from the intake port 40a to the heat exchanger group 18 is a flow path 21a, and the flow of cooling air from the periphery of the diesel engine 12 to the outside of the machine room 4 through the exhaust port is a flow path. 22.

  As described above, the liquid reducing agent tank mounting portion 17 for mounting the liquid reducing agent tank 20 is provided below the machine room 4 and adjacent to the front side of the maintenance ladder 15. 2 and FIG. 3, the liquid reducing agent tank mounting portion 17 is upstream of the diesel engine 12 of the cooling air generated by the cooling fan 12a provided in the diesel engine 12 (that is, The left side of the machine body, which is provided below the machine room and inside the left and right widths, so that at least a part of the cooling air flowing toward the diesel engine 12 passes through the space (that is, the machine room 4). And a space for mounting the liquid reducing agent tank 20 formed continuously with the outer cover 40). That is, the space in the machine chamber 4 and the space in the liquid reducing agent tank mounting portion 17 are continuously provided so that the cooling air efficiently passes, but the machine chamber 4 and the liquid reducing agent tank mounting portion 17 It is formed as a continuous space bent at the connecting portion.

  As shown in FIG. 4, in the side view, the engine room 4 occupies most of the internal space of the diesel engine 12. Therefore, the liquid reducing agent tank mounting portion 17 is disposed below the diesel engine 12. It can be said that.

  The liquid reductant tank mounting portion 17 includes a door 17c that can be opened and closed by a hinge 17d provided on the front side of the opening that opens toward the side of the machine body. A plurality of vent holes 21 a and 21 b as cooling air intakes are provided on the side surface (that is, the door 17 c) and the lower surface of the liquid reducing agent tank mounting portion 17. Then, at least a part of the cooling air generated by the cooling fan 12a provided in the diesel engine 12 passes through the air holes 17a and 17b through the liquid reducing agent tank mounting portion 17 as shown by flow paths 21b and 21c in FIG. The heat exchanger group 18 flows in the order of the periphery of the liquid reducing agent tank 20 mounted therein, the heat exchanger group 18, the cooling fan 12 a, the diesel engine 12, and the outside of the machine room 4 through the exhaust port. In addition, while accelerating the heat radiation of the diesel engine 12, the heat radiation of the liquid reductant tank 20 is also promoted and the temperature increase of the liquid reductant in the liquid reductant tank can be suppressed.

  In the liquid reducing agent tank 20 mounted on the liquid reducing agent tank mounting unit 17, for example, a 32.5% urea aqueous solution is stored as a liquid reducing agent used in the NOx reduction catalyst 19a. The liquid reducing agent tank 20 itself and accessories such as a cap are made of a corrosion resistant material such as stainless steel in order to prevent corrosion due to the adhesion of the liquid reducing agent.

  The effect in this Embodiment comprised as mentioned above is demonstrated.

  In recent years, nitrogen compounds, carbon monoxide, and the like are used as reducing agents for NOx reduction catalysts. Recently, a technique using urea water (urea aqueous solution) as a reducing agent has attracted attention. For example, in a vehicle or machine using a NOx reduction catalyst-equipped engine that uses a liquid reducing agent, a portion where the liquid reducing agent tank that stores the liquid reducing agent can be kept warm in the vehicle or machine, that is, an engine or motor Some of the liquid reductants frozen in the liquid reductant tank are thawed or kept warm by being arranged in the vicinity.

  However, the operating environment of a self-propelled recycling machine equipped with an engine having a NOx reduction catalyst is not limited to a cold climate in which the liquid reducing agent freezes. In a warm operating environment, the liquid reducing agent tank There is a risk that the liquid reducing agent in the inside is deteriorated by overheating, or gas is generated from the liquid reducing agent.

  On the other hand, in the present embodiment, the liquid reducing agent tank mounting portion 17 is upstream of the diesel engine 12 of the cooling air generated by the cooling fan 12a provided in the diesel engine 12, The space in the machine chamber 4 and the liquid are provided below the chamber 4 and inside the lateral width so that at least a part of the cooling air flowing toward the diesel engine 12 passes through the space for mounting the liquid reducing agent tank 20. Since the space in the reducing agent tank mounting portion 17 is continuously formed, heat radiation is promoted by the cooling air passing around the liquid reducing agent tank 20, and the temperature of the liquid reducing agent in the liquid reducing agent tank 20 is increased. Can be suppressed. Therefore, it is possible to suppress the liquid reducing agent in the liquid reducing agent tank 20 from being overheated and deteriorated, or the generation of gas from the liquid reducing agent.

  Further, since the liquid reducing agent tank mounting portion 17 for mounting the liquid reducing agent tank 20 is provided below the machine chamber 4 and inside the left and right widths, the liquid reducing agent tank mounting portion 17 receives light from above. The area and the light receiving angle are reduced, and the temperature increase in the liquid reductant tank mounting portion 17 due to sunlight can be suppressed. Therefore, the temperature increase of the liquid reductant in the liquid reductant tank 20 is more effectively suppressed. can do.

  Furthermore, while continuously configuring the space in the machine room 4 and the space in the liquid reducing agent tank mounting part 17 so that the cooling air efficiently passes, Since it is formed as a continuous space bent at the connecting portion, it is possible to suppress the temperature increase of the liquid reducing agent tank 20 and its liquid reducing agent due to the radiant heat from the diesel engine 12 and the heat exchanger group 18. The temperature increase of the liquid reducing agent in the agent tank 20 can be more effectively suppressed.

  Further, since the liquid reducing agent tank mounting portion 17 is disposed below the machine room 4, it is easy for the operator to access from the ground level, and the liquid reducing agent tank 20 of the urea aqueous solution that is a liquid reducing agent is provided. Labor such as replenishment can be reduced.

  In this embodiment, a self-propelled crusher has been described as an example of a self-propelled recycling machine. However, the present invention is not limited to this, and various self-propelled recycling machines equipped with an engine having a NOx reduction catalyst are also described. Applicable.

1 traveling body 2 hopper 3 crushing device 4 machine room 5 discharge conveyor 6 traveling frame 7 footwear 7
8 Driving wheel 9 Coupling frame 10 Main body frame 10a, 10b Horizontal member 11 Support member 12 Diesel engine 13 Conveyor belts 14, 15 Ladder 16 for operation panel 17 Liquid reducing agent tank mounting portion 17a, 17b Vent hole 17c Door 17d Hinge 18 Heat Exchanger group 18a Oil cooler 18b Radiator 18c Intercooler 19 Exhaust pipe 19a NOx reduction catalyst 20 Liquid reducing agent tank 40 Exterior cover 40a Inlet 100 Self-propelled crusher (self-propelled recycling machine)

Claims (3)

A crawler-type left traveling device and a right traveling device paired in parallel;
A main body frame coupled above a left traveling frame forming a skeleton of the left traveling device and a right traveling frame forming a skeleton of the right traveling device;
A processing device installed on the main body frame;
An unloading conveyor for unloading processed material inserted between the left traveling frame and the right traveling frame in the front-rear direction and discharged from the processing device;
An engine having a NOx reduction catalyst that is installed horizontally so that the drive shaft extends in the left-right direction on the main body frame, and that processes exhaust gas;
A machine room formed on the main body frame by an exterior cover for covering the mounted device including the engine;
In a self-propelled recycling machine provided with a liquid reducing agent tank containing a liquid reducing agent used for the NOx reduction catalyst,
The liquid reducing agent tank is a space in the machine room upstream of the cooling air generated by a cooling fan provided in the engine and below the machine room and inside the left and right width. A self-propelled recycling machine, which is provided in a liquid reducing agent tank mounting portion formed continuously. In the self-propelled recycling machine according to claim 1,
The self-propelled recycling machine, wherein the liquid reducing agent tank mounting portion is arranged so that at least a part thereof overlaps with the engine in a vertical direction in a side view. In the self-propelled recycling machine according to claim 1,
The self-propelled recycling machine, wherein the liquid reductant tank mounting portion is provided above a region where the ground passes relative to the airframe when the transport vehicle is raised and lowered.

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