JP2013249663A - Rolling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling machine in which a liquid reducing agent tank for storing a liquid reducing agent for reducing NOx by a NOx catalyst device is suitably disposed without the freezing and overheating of the liquid reducing agent.SOLUTION: A reducing agent tank compartment (2b) is provided adjacently to an engine compartment with a bulkhead (36) in between on a front side with respect to the engine compartment (2a) of a rolling machine. A cover member (34) for covering both the engine compartment and the reducing agent tank compartment is provided in such a manner as to abut on an upper edge of the bulkhead in a closed state. A reducing agent tank (24) for storing a liquid reducing agent for reducing and removing NOx, which are discharged from a diesel engine, by a NOx catalyst device (22) is disposed inside the reducing agent tank compartment (2b).

Description

  The present invention relates to a rolling compactor used for road construction, and more specifically, stores a liquid reducing agent supplied to a NOx catalyst device for purifying NOx discharged from a diesel engine mounted on the compacting machine. The present invention relates to an arrangement structure of a reducing agent tank.

In recent years, various NOx purification devices have been used to purify NOx discharged from diesel engines. For example, supplying a liquid reducing agent such as urea water to the exhaust upstream side of a NOx catalyst device (SCR catalyst, etc.). NOx purification technology for reducing NOx with a NOx catalyst device has been developed.
Since diesel engines are also widely used in construction machines, NOx catalyst devices configured to supply the liquid reducing agent are being widely adopted. In such construction machines, liquid reduction of urea water or the like is carried on the vehicle body. A liquid reducing agent tank for storing the agent is provided.

By the way, since the construction machine is used outdoors, there is a problem that the liquid reducing agent such as urea water in the liquid reducing agent tank is frozen and cannot be used under a low temperature condition such as winter.
Therefore, for example, in a hydraulic excavator, the liquid reducing agent tank is disposed close to the diesel engine so that the liquid reducing agent can be prevented from freezing or can be easily thawed even if the liquid reducing agent freezes. It is disclosed (see Patent Document 1).

JP 2003-20936 A

The diesel engine is also mounted on a compacting machine used for road construction among construction machines. In this compacting machine as well, it is desirable to arrange a liquid reducing agent tank in the vicinity of the diesel engine.
However, a rolling machine such as a vibrating roller vehicle is smaller than a large construction machine such as a hydraulic excavator as shown in Patent Document 1, and a liquid reducing agent tank is simply installed in an engine room of a diesel engine. If it is arranged in the vicinity, there is a problem that it is too close to the diesel engine and overheated.

For example, when the liquid reducing agent is urea water, the temperature of the urea water that can ensure a so-called pot life (usable period) is about 40 ° C., whereas the temperature in the engine room of the rolling press machine is about 50-70. The temperature of urea water in the liquid reducing agent tank provided in the vicinity of the diesel engine exceeds about 40 ° C., which is a temperature that can secure the pot life, and the function as a reducing agent of the liquid reducing agent. There is a problem that is greatly damaged.
The present invention has been made to solve such problems, and the object of the present invention is to provide a liquid reducing agent tank for storing a liquid reducing agent for reducing NOx in a NOx catalyst device. An object of the present invention is to provide a compacting machine suitably disposed without freezing or overheating.

  In order to achieve the above object, a compaction machine according to claim 1 is a diesel engine, a NOx catalyst device for purifying NOx discharged from the diesel engine, and supplied to the NOx catalyst device to reduce NOx. And a reducing agent tank that stores a liquid reducing agent to perform, and in a rolling machine that performs rolling of the road surface, an engine room that houses the diesel engine, and a front side of the engine room of the rolling machine, A reductant tank chamber located adjacent to the engine chamber across the partition; and a lid member that can be opened and closed so as to cover both the engine chamber and the reductant tank chamber. In the closed state, it contacts the upper edge of the partition wall, and the reducing agent tank is housed in the reducing agent tank chamber.

According to a second aspect of the present invention, there is provided a compaction machine according to the first aspect of the present invention, wherein an opening hole is provided in the chamber wall on the front side of the reducing agent tank chamber of the compaction machine so as to be able to introduce outside air, and the opening hole is opened and closed. An opening hole closing member, a communication hole provided in the partition wall, and a communication hole closing member that covers the communication hole so as to be openable and closable are provided.
According to a third aspect of the present invention, in the compaction machine according to the second aspect, during the operation of the compaction machine, when the communication hole is closed by the communication hole closing member, the opening hole is closed by the opening hole closing member. When the opening hole is closed by the opening hole closing member, the communication hole is opened without being closed by the communication hole closing member.

In the rolling machine of claim 4, in claim 3, the opening hole closing member and the communication hole closing member share one detachable common closing member, and during operation of the rolling machine, Only one of the opening hole and the communication hole is selectively closed using the common closing member.
In the rolling machine according to claim 5, in any one of claims 2 to 4, a side wall of the reducing agent tank chamber is provided with an exhaust hole separately from the opening hole and the communication hole. To do.
According to a sixth aspect of the present invention, there is provided a compaction machine according to any one of the first to fifth aspects, wherein the compaction machine has a front compaction roller that compacts a road surface at a front portion, and the engine chamber is formed of the compaction machine. The reducing agent tank chamber is located above the front pressure roller, and is provided behind the front pressure roller.

According to the rolling machine of claim 1, the reducing agent tank chamber is provided adjacent to the engine chamber and the partition wall in front of the engine chamber of the rolling press machine, and both the engine chamber and the reducing agent tank chamber are provided. A cover member that can be opened and closed is provided in contact with the upper edge of the partition wall in the closed state, and a liquid reducing agent that reduces and removes NOx discharged from the diesel engine by the NOx catalyst device is stored in the reducing agent tank chamber. The reductant tank is accommodated.
Therefore, the reducing agent tank is isolated from the diesel engine by the upper edge of the partition wall and the lid member coming into contact with each other, so that the heat generated by the diesel engine cannot be directly received, and the liquid reducing agent in the reducing agent tank Can be prevented from overheating by the heat generated by the diesel engine. Thereby, the function as a reducing agent of a liquid reducing agent is securable.

According to the rolling machine of claim 2, an opening hole closing member that covers the opening hole so as to be opened and closed is provided in the chamber wall on the front side of the reducing agent tank chamber of the rolling pressure machine so that the outside air can be introduced. Further, a communication hole is provided in the partition wall, and a communication hole closing member that covers the communication hole so as to be opened and closed is provided.
Therefore, by opening and closing these opening holes and communication holes, outside air can be taken into the reducing agent tank chamber through the opening holes, and warm air in the engine chamber can be taken in through the communication hole, and the inside of the reducing agent tank It is possible to adjust the temperature of the liquid reducing agent to an appropriate temperature.

According to the rolling machine of claim 3, during the operation of the rolling machine, when the communicating hole is closed by the communicating hole closing member, the opening hole is opened without being closed by the opening hole closing member, and the opening hole is opened. Is closed by the opening hole closing member, the communication hole is opened without being closed by the communication hole closing member.
Therefore, by opening the opening hole when the communication hole is closed, while taking in the outside air into the reducing agent tank chamber, it is possible to block the inflow of warm air from the engine chamber into the reducing agent tank chamber, When the opening hole is closed, the communication hole is opened, so that the inflow of outside air into the reducing agent tank chamber can be blocked, while warm air in the engine chamber can be taken into the reducing agent tank chamber.

As a result, when the outside air temperature is high (summer season, etc.), it is possible to cool the liquid reducing agent in the reducing agent tank by introducing outside air into the reducing agent tank chamber from the opening hole. Where there is a temperature that can ensure life (usable period) (about 40 ° C with urea water), even when the outside air temperature is high (summer, etc.), the temperature of the liquid reducing agent ensures the pot life. It is possible to avoid exceeding the possible temperature as much as possible, and to ensure a good function as a reducing agent of the liquid reducing agent.
In addition, when the outside air temperature is low (such as in the winter), warm air in the engine room due to the heat generated by the diesel engine can be introduced into the reducing agent tank room to prevent freezing due to a decrease in the temperature of the liquid reducing agent in the reducing agent tank. Alternatively, for example, when the liquid reducing agent in the reducing agent tank is frozen during the warm-up operation of the diesel engine, the liquid reducing agent in the reducing agent tank can be quickly thawed by the warm air in the engine room. Even when the outside air temperature is low (such as in winter), the function of the liquid reducing agent as a reducing agent can be secured well.

According to the rolling machine of the fourth aspect, during the operation of the rolling machine, only one of the opening hole and the communication hole is selectively closed using the common closing member, so that it communicates with the opening hole closing member. The hole closing member can be used in common to reduce the manufacturing cost and improve the working efficiency, while ensuring the function of the liquid reducing agent as the reducing agent.
According to the compaction machine of the fifth aspect, since the exhaust hole is provided in the side wall of the reducing agent tank chamber, when the outside air temperature is high (summer season, etc.), the exhaust hole extends from the opening hole into the reducing agent tank chamber. Can be used to cool the liquid reductant in the reductant tank well, or when the outside air temperature is low (such as in winter), the engine room flows from the communication hole to the exhaust hole in the reductant tank room. Thus, freezing due to a temperature drop of the liquid reducing agent in the reducing agent tank can be satisfactorily prevented.

According to the compaction machine of claim 6, since the reducing agent tank chamber is provided above the front rolling roller, the reducing agent tank chamber is grounded by at least the diameter of the front rolling roller. The liquid reductant in the reductant tank can be prevented from being heated by reflected heat from the ground, even when the outside air temperature is high (summer, etc.). The temperature can be prevented from rising due to the reflected heat of the ground.
In addition, when the reducing agent tank chamber is at a high position separated from the ground by at least the diameter of the front rolling roller, the reducing agent tank chamber located at the front end portion of the rolling machine has a small height dimension. Although the volume is very small and it tends to become a dead space, this dead space can also be used effectively.

It is a side view of the vibration roller vehicle concerning the present invention. It is the front view which looked at the vibration roller vehicle concerning the present invention from the front. It is a cross-sectional view of the front vehicle body of the vibration roller vehicle along the AA line of FIG. It is a longitudinal cross-sectional view of the front vehicle body of the vibration roller vehicle which follows the BB line of FIG. It is sectional drawing (b) of the front wall which followed the CC line of the enlarged view (a) and (a) which looked at the opening hole from the reducing agent tank chamber side. It is the front view (a) and top view (b) of a closure member. It is sectional drawing (b) of the front wall which follows the DD line | wire of the front view (a) of the state which covered the opening hole with the closing member, and (a). It is sectional drawing (b) of the partition along the EE line of the enlarged view (a) and (a) which looked at the communicating hole from the reducing agent tank chamber side.

Hereinafter, an embodiment of a rolling machine according to the present invention will be described with reference to the drawings.
The rolling machine according to the present invention is, for example, a vibration roller vehicle that performs a paving operation, and the vibration roller vehicle will be described below.
FIG. 1 is a side view showing an entire vibration roller vehicle according to the present invention, and FIG. 2 is a front view of the vibration roller vehicle as viewed from the front. 3 is a transverse sectional view taken along line AA in FIG. 1, and FIG. 4 is a longitudinal sectional view taken along line BB in FIG.

The vibration roller vehicle is roughly composed of a front vehicle body 2 provided with a front rolling roller 1 and a rear vehicle body 4 provided with a rear rolling roller 3. The front vehicle body 2 and the rear vehicle body 4 are connected in an articulated manner that can be bent in the horizontal direction via a center pin 5, and the vibration roller vehicle bends the front vehicle body 2 and the rear vehicle body 4 to each other. Thus, the vehicle can be turned.
The front rolling roller 1 is composed of a metal drum having a length substantially corresponding to the vehicle width, and is rotatably supported by a pair of left and right support arms 6 extending downward from the front vehicle body 2. On the other hand, the rear rolling roller 3 includes a pair of two rubber tires 3a and 3a and a pair of left and right rubber tires 3a. The rear rolling roller 3 includes a total of four rubber tires 3a, and is rotatably supported by an axle 7 provided on the rear vehicle body 4. Yes.

  As shown in FIGS. 3 and 4, the front body 2 has a body frame surrounded by a rear wall 30 made of a metal plate, a pair of side walls 31, 31, a front wall 32, and a bottom wall 33 to form an outer shell, A hood (lid member) 34 made of a metal plate is placed on the top so as to be openable and closable. A partition wall 36 is provided between the rear wall 30 and the front wall 32 so as to be located closer to the front of the front vehicle body 2. Thus, the space surrounded by the rear wall 30, the pair of side walls 31, 31 and the partition wall 36 functions as the engine room (engine room) 2 a, while being surrounded by the partition wall 36, the pair of side walls 31, 31 and the front wall 32. The broken space functions as the reducing agent tank chamber 2b. Specifically, the front rolling roller 1 is positioned in front of the engine room 2a, and the front end portion of the front vehicle body 2 on which the headlights 39 and 39 are disposed is a hood for improving the operator's forward visibility. 34, the reducing agent tank chamber 2b positioned at the front end portion of the front vehicle body 2 is separated from the ground by at least the diameter of the front rolling roller 1 and is high. The vertical dimension is considerably small and narrow.

In the engine room 2a, devices such as a diesel engine (hereinafter simply referred to as an engine) 20 and a hydraulic pump (not shown) are mounted as a power unit, and the driving force of the engine 20 is applied to the rear roller 3 via the axle 7. Communicated. Although not shown, the hydraulic oil discharged from the hydraulic pump by driving the engine 20 is supplied to, for example, a vibration motor provided in the front rolling roller 1, and the vibration motor is supplied to the road surface by the supply of hydraulic oil. The front rolling roller 1 is vibrated at the time of rolling.
An operation console 9 having a steering 8 is installed at a front position on the rear vehicle body 4, and a seat 10 is installed on the rear side of the operation console 9. An operator seated on the seat 10 runs the vibration roller vehicle by operating the steering 8 and the accelerator pedal or the brake pedal under the feet, and performs rolling of the road surface by the front roller 1 and the rear roller 3 during paving. .

  The vehicle body frame 12 constituting the rear vehicle body 4 forms a box-shaped water tank accommodating portion 13 immediately below and behind the seat 10, and the water tank 14 is installed in the water tank accommodating portion 13. The water storage tank 14 is connected to a roller spray nozzle 15 disposed in the vicinity of the front roller 1 and the rear roller 3 via a pipe. Specifically, the roller water spray nozzle 15 is attached to scraper devices 26 and 28 to be described later. Thus, during pavement work, water stored in the water storage tank 14 is forward-rolled from the roller water spray nozzle 15 so that pavement materials such as gravel and asphalt do not adhere to the front rolling roller 1 and the rear rolling roller 3. Water can be sprayed on the roller 1 and the rear rolling roller 3 and the road surface.

The front vehicle body 2 is provided with scraper devices 26 and 27 extending toward the front pressure roller 1 and extending along the rotation axis of the front pressure roller 1. Pavement materials such as gravel and asphalt attached to the pressure roller 1 can be scraped off. The rear vehicle body 4 is provided with a scraper device 28 that extends toward the rear rolling roller 3 and extends in the direction along the rotational axis of the rear rolling roller 3. Pavement materials such as gravel and asphalt attached to the roller 3 can be scraped off.
3 and 4, a NOx catalyst device 22 is interposed in the exhaust passage of the engine 20 in order to purify NOx discharged from the engine 20. The NOx catalyst device 22 is composed of a selective reduction type NOx catalyst device such as an SCR catalyst (Selective Catalytic Reduction catalyst), for example. By supplying urea water (liquid reducing agent) to the exhaust upstream side of the NOx catalyst device 22, the NOx catalyst device 22 is provided. The NOx exhausted from the engine 20 can be selectively reduced.

  The front vehicle body 2 is equipped with a reducing agent tank 24 for storing urea water so that the urea water can be appropriately supplied to the NOx catalyst device 22. Specifically, the reducing agent tank 24 is provided in the reducing agent tank chamber 2b at a position substantially in the center in the vehicle width direction. That is, the reducing agent tank 24 is provided in the reducing agent tank chamber 2b located in front of the engine room 2a with the partition wall 36 interposed therebetween. Since the urea water is used at about 5% by weight with respect to the fuel (light oil) of the engine 20, if the urea water is replenished at the same time as refueling, it is reduced when the fuel tank (not shown) is 50 liters, for example. The agent tank 24 has a capacity of about 2.5 liters. Note that the reducing agent tank 24 and the NOx catalyst device 22 are connected by a urea water supply pipe 23.

As shown in FIG. 4, the upper edge of the partition wall 36 and the lower surface of the hood 34 are in contact with each other, whereby the space is completely separated between the engine room 2a and the reducing agent tank room 2b. More specifically, an insulator 35 made of a flexible rubber material or the like is attached to the hood 34 for the purpose of sound absorption, heat insulation, etc., so that the upper edge of the partition wall 36 is in close contact with the insulator 35. The engine room 2a and the reducing agent tank chamber 2b are substantially air-tightly separated at the contact portion between the upper edge of the partition wall 36 and the lower surface of the hood 34.
As shown in FIGS. 2 and 3, the front wall 32 is provided with a pair of opening holes 32 a and 32 a that are positioned symmetrically in the width direction of the front vehicle body 2. Closing members (opening hole closing members) 40 are detachably disposed on the reducing agent tank chamber 2b side of the opening holes 32a and 32a so as to cover the opening holes 32a and 32a. The holes 32a and 32a can be opened and closed.

FIG. 5 shows an enlarged view (a) of the opening hole 32a viewed from the reducing agent tank chamber 2b side, and a cross-sectional view (b) of the front wall 32 along the line CC in FIG. 6 (a). FIG. 7 shows a front view (a) and a top view (b) of the closing member 40, and FIG. 7 shows a front view (a) and a D- A cross-sectional view (b) of the front wall 32 along the line D is shown.
As shown in FIGS. 2 and 5, the opening hole 32 a is configured by, for example, a plurality of elongated (here, four) slits extending in the vertical direction. On the other hand, as shown in FIG. 6, the closing member 40 is a plate-like metal member having an end portion and a flange 41 formed thereon, and corresponds to the plurality of slits constituting the opening hole 32a. An opening hole 40a composed of a plurality of (four) slits is formed. The member width between the slits of the opening hole 32a and the opening hole 40a is set equal to or wider than the slit width. The front wall 32 is provided with a pair of upper and lower guide members 32b and 32b so as to be able to slide and hold the closing member 40 along the surface of the front wall 32 with the opening hole 32a interposed therebetween. As a result, the closing member 40 is slid in the direction of the arrow along the guide members 32b and 32b as shown by solid lines and two-dot chain lines in FIG. 7, and the relative positions of the slits of the opening hole 32a and the opening hole 40a are changed. Thus, the opening degree of the opening hole 32a can be adjusted as appropriate, and the opening hole 32a can be opened and closed.

Further, as shown in FIG. 3, the partition wall 36 is provided with a communication hole 36 a located near one side wall 31 so as to receive the air blown by the cooling fan 21 of the engine 20. A closing member (communication hole closing member) 44 is detachably disposed on the reducing agent tank chamber 2b side of the communication hole 36a so as to cover the communication hole 36a, and the communication hole 36a is opened and closed by the closing member 44. Is possible.
FIG. 8 shows an enlarged view (a) of the communication hole 36a viewed from the reducing agent tank chamber 2b side, and a cross-sectional view (b) of the partition wall 36 taken along the line E-E in FIG. As shown in FIG. 4, the communication hole 36a is configured by, for example, a plurality of long (four in this case) slits extending in the vertical direction in the same manner as the opening hole 32a. A pair of upper and lower guide members 36b, 36b are provided so as to be able to slide and hold the closing member 44 along the surface of the partition wall 36 so as to be sandwiched therebetween. As shown in FIGS. 6 and 7 together, the closing member 44 has the same structure as the closing member 40 and has an opening hole 44a. Thus, like the closing member 40, the closing member 44 is slid in the direction of the arrow along the guide member 36b as shown by a solid line and a two-dot chain line in FIG. 7, and the relative slits of the communication hole 36a and the opening hole 44a are relative to each other. By changing the position, the opening degree of the communication hole 36a can be adjusted as appropriate, and the communication hole 36a can be opened and closed.

Since the closing member 40 and the closing member 44 have the same structure, the closing member 40 can be used for opening and closing the communication hole 36a, and conversely, the closing member 44 can be used for opening and closing the opening hole 32a. The closing member 40 and the closing member 44 can be shared as a common closing member.
Further, as shown in FIG. 3, an exhaust hole 31a is provided separately from the opening hole 32a and the communication hole 36a in the portion of the reducing agent tank chamber 2b on the side wall 31 on the side separated from the communication hole 36a.
Hereinafter, the operation and effect according to the present invention generated by the reducing agent tank 24, the opening hole 32a, and the communication hole 36a arranged in the reducing agent tank chamber 2b will be described.

As described above, the space between the reducing agent tank chamber 2b and the engine room 2a is completely separated by contacting the upper edge of the partition wall 36 and the lid member 34. The reducing agent tank 24 is separated from the engine room 2a. Is also isolated from the engine 20 in the reducing agent tank chamber 2b located in the front. Therefore, the reducing agent tank 24 can be prevented from directly receiving the heat generated by the engine 20. This prevents the urea water in the reducing agent tank 24 from being overheated by the heat generated by the engine 20.
Further, as described above, the reducing agent tank chamber 2b is located at a high position separated from the ground by at least the diameter of the front roller 1, so that the urea water in the reducing agent tank 24 is reflected from the ground. It is not heated by.

Further, the front end portion of the front vehicle body 2 is thus separated from the ground by at least the diameter of the front rolling roller 1, and the front end portion of the hood 34 is inclined downward in order to improve the forward visibility of the operator. Therefore, the reducing agent tank chamber 2b located at the front end portion of the front vehicle body 2 has a small size in the height direction and a very small volume and easily becomes a dead space. By using the reducing agent tank chamber 2b as the front end portion and accommodating the reducing agent tank 24 in the reducing agent tank chamber 2b, such a dead space can be effectively utilized.
The front wall 32 has a pair of opening holes 32 a and 32 a that can be opened and closed by a closing member 40, and the partition wall 36 has a communication hole 36 a that can be opened and closed by a closing member 44. Therefore, by opening and closing these opening holes 32a and 32a and the communication hole 36a, outside air is taken into the reducing agent tank chamber 2b through the opening holes 32a and 32a, and warm air in the engine room 2a is connected through the communication hole 36a. It is possible to adjust the temperature of the urea water in the reducing agent tank 24 to an appropriate temperature. Hereinafter, the cases will be described specifically.

[When the outside temperature is high (summer, etc.)]
When the outside air temperature is high (summer season, etc.), urea water is overheated when the reducing agent tank 24 receives heat generated by the engine 20, so the communication hole 36a is closed by the closing member 44 and the opening hole is opened. 32a and 32a are opened by sliding the closing member 40 to the open position or by completely removing the closing member 40. In this case, as described above, since the closing member 40 and the closing member 44 can be shared as a common closing member, the removed one closing member 40 is shared as the closing member 44 so as to close the communication hole 36a. It may be.
As described above, when the opening holes 32a and 32a are opened while the communication hole 36a is closed, the engine room 2a and the reducing agent tank chamber 2b are completely blocked by the partition wall 36, and the warm air in the engine room 2a is reduced by the reducing agent tank. When the vibrating roller vehicle travels, in particular, when the vibrating roller vehicle moves forward, the inside of the reducing agent tank chamber 2b is opened from the opening holes 32a and 32a as indicated by solid arrows in FIG. Thus, outside air is introduced into the exhaust hole 31a and discharged from the exhaust hole 31a so that a flow of outside air can be satisfactorily generated in the reducing agent tank chamber 2b, and the urea water in the reducing agent tank 24 can be cooled and not overheated.

As a result, the temperature of the urea water can ensure a so-called pot life (usable period) is about 40 ° C., but the temperature of the urea water ensures the pot life even when the outside air temperature is high (summer, etc.) It is possible to avoid exceeding about 40 ° C. as much as possible, and it is possible to satisfactorily ensure the function as a NOx reducing agent for urea water.
At this time, if the closing member 40 and the closing member 44 are shared as a common closing member, the manufacturing cost can be reduced and the working efficiency can be improved.

[When the outside temperature is low (winter etc.)]
When the outside air temperature is low (in winter, etc.), the urea water in the reducing agent tank 24 is likely to freeze due to a drop in temperature, so the opening holes 32a and 32a are closed by the closing member 40 and the communication hole 36a is closed. Opens the closing member 44 by sliding it to the open position or removing the closing member 44 completely. In this case, as described above, since the closing member 40 and the closing member 44 can be shared as a common closing member, the removed closing member 44 is shared as the closing member 40 so as to close the opening hole 32a. Also good.
Thus, by closing the opening holes 32a and 32a while opening the communication hole 36a, it is possible to prevent low-temperature outside air from being taken into the reducing agent tank chamber 2b, and to connect the engine room 2a and the reducing agent tank chamber 2b. As shown by a broken line arrow in FIG. 3, the warm air in the engine room 2a due to the heat generated by the engine 20 is introduced into the reducing agent tank chamber 2b and discharged from the exhaust hole 31a. Thus, a good warm air flow can be created in the reducing agent tank chamber 2b, and freezing due to a decrease in the temperature of the urea water in the reducing agent tank 24 can be prevented. Alternatively, for example, even when the urea water in the reducing agent tank 24 is frozen during the warm-up operation of the engine 20, the urea water in the reducing agent tank 24 is quickly thawed by the warm air in the engine room 2a. can do.

Here, in particular, the communication hole 36 a is provided near the one side wall 31 so as to be able to receive the air blown from the cooling fan 21 of the engine 20. The warm air flowing along the side wall 31 in 2a can be satisfactorily introduced into the reducing agent tank chamber 2b, and the urea water in the reducing agent tank 24 can be rapidly heated.
Thereby, even when the outside air temperature is low (such as in winter), the function as a NOx reducing agent for urea water can be ensured satisfactorily.

At this time, by sharing the closing member 40 and the closing member 44 as a common closing member, it is possible to reduce the manufacturing cost and improve the working efficiency.
[When the outside air temperature is slightly high or slightly low (spring, autumn, etc.)]
When the outside air temperature is slightly high or slightly low (spring, autumn, etc.), the opening degree of the opening holes 32a, 32a and the communication hole 36a is adjusted by sliding the closing member 40 and the closing member 44 as appropriate.
Thereby, even when the outside air temperature is slightly high or slightly low (spring season, autumn season, etc.), the function of the urea water as a NOx reducing agent can be secured well.

The description of the embodiment is finished as above, but the aspect of the present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the opening holes 32a and 32a and the communication hole 36a are formed of the same slits, and the closing member 40 and the closing member having the same structure having the opening hole 40a and the opening hole 44a formed of the same slits. 44, the opening degree of the opening holes 32a, 32a and the communication hole 36a is adjusted to open and close the opening holes 32a, 32a and the communication hole 36a. However, the opening holes 32a, 32a and the communication hole 36a are limited to slits. It may be a simple hole, not all of them, and the closing member 40 and the closing member 44 may be composed of a simple closing plate or grommet, and all have the same structure. You don't have to. Further, the closing member 40 and the closing member 44 may be configured by opening / closing doors such as louvers that can be opened and closed.

In the above embodiment, the pair of opening holes 32a and 32a are provided in the front wall 32, and one communication hole 36a is provided in the partition wall 36. However, these may be singular or plural. In addition, one opening hole 32 a may be provided in the front wall 32, while a plurality of communication holes 36 a may be provided in the partition wall 36.
In the above embodiment, the closing member 40 and the closing member 44 are provided on the reducing agent tank chamber 2b side. However, the closing member 40 is provided on the outer side of the front wall 32 and the closing member 44 is provided on the engine room 2a side. It may be.
Further, in the above embodiment, the exhaust hole 31a is provided in the portion of the reducing agent tank chamber 2b of the side wall 31 on the side separated from the communication hole 36a. However, a plurality of exhaust holes 31a may be provided. In the case where there is a gap between the side wall 31 and the hood 34, the exhaust hole 31a may not be provided, and the gap may be used as a substitute for the exhaust hole 31a.

1 Front roller 2 Front body 2a Engine room (engine room)
2b Reducing agent tank chamber 20 Diesel engine 22 NOx catalyst device 24 Reducing agent tank 31 Side wall 31a Exhaust hole 32 Front wall 32a Opening hole 34 Hood (lid member)
36 Bulkhead 36a Communication hole 40 Closing member (opening hole closing member)
40a Opening hole 44 Closing member (communication hole closing member)
44a Opening hole

Claims (6)

A road surface comprising a diesel engine, a NOx catalyst device for purifying NOx discharged from the diesel engine, and a reductant tank for storing a liquid reductant supplied to the NOx catalyst device to reduce NOx. In the rolling machine that performs the rolling
An engine compartment housing the diesel engine;
A reducing agent tank chamber positioned adjacent to the engine chamber and the partition wall in front of the engine chamber of the compaction machine;
A lid member provided so as to be openable and closable so as to cover both the engine chamber and the reducing agent tank chamber,
The lid member is in contact with the upper edge of the partition wall in the closed state,
The reducing machine is characterized in that the reducing agent tank is accommodated in the reducing agent tank chamber. An opening provided in the chamber wall on the front side of the reducing agent tank chamber of the rolling machine so as to be able to introduce outside air;
An opening hole closing member covering the opening hole so as to be openable and closable;
A communication hole provided in the partition;
The rolling machine according to claim 1, further comprising a communication hole closing member that covers the communication hole so as to be openable and closable.   During the operation of the compaction machine, when the communication hole is closed by the communication hole closing member, the opening hole is opened without being closed by the opening hole closing member, and the opening hole is opened by the opening hole closing member. 3. The compaction machine according to claim 2, wherein the communication hole is opened without being closed by the communication hole closing member. The opening hole closing member and the communication hole closing member share a common removable closing member,
4. The rolling machine according to claim 3, wherein during the operation of the rolling machine, only one of the opening hole and the communication hole is selectively closed using the common closing member. 5.   5. The compacting machine according to claim 2, wherein an exhaust hole is provided in a side wall of the reducing agent tank chamber in addition to the opening hole and the communication hole. The rolling machine has a front rolling roller for rolling the road surface at the front,
The engine chamber is provided behind the front rolling roller of the rolling machine, and the reducing agent tank chamber is positioned above the front rolling roller. The rolling compaction machine according to any one of claims 1 to 5.

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