JP2014108064A - Combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heating of a urea water tank included in an emission purification device.SOLUTION: This combine includes: a grain tank (5) loaded on a machine body frame (1); an SCR catalyst part (52) for purifying nitrogen oxide in exhaust gas by jetting urea water to a fluid channel of exhaust gas exhausted from an engine (E); and a urea water tank (56) for storing urea water to supply to the SCR catalyst part (52). A rear inclination surface (5C) inclining downward to the front is formed on the rear side lower part of the grain tank (5), the urea water tank (56) is arranged below the rear inclination surface (5C), and the urea water tank (56) is supported on the grain tank (5).

Description

  The present invention relates to a combine equipped with an exhaust purification device that purifies exhaust gas from an engine.

  Conventionally, a technique is known in which an exhaust purification device is arranged between a threshing device mounted on a combine body and a glen tank (Patent Document 1).

JP 2011-24510 A

  However, the exhaust emission control device according to the invention described in Patent Document 1 supplies a DPF that collects particulate matter contained in exhaust gas, an SCR catalyst unit that purifies nitrogen oxides in the exhaust gas, and the SCR catalyst unit. Since the urea water tank for storing the urea water to be stored is arranged in the space between the threshing device and the Glen tank, the urea water tank becomes hot due to the hot air flowing from the engine side to the rear by the traveling wind or the hot air of the DPF As a result, the internal pressure of the urea water tank increases and may be damaged, or the urea water may be altered.

  Therefore, the main problem of the present invention is to eliminate such problems.

The present invention that has solved the above problems is as follows.
According to the first aspect of the present invention, a nitrogen tank in the exhaust gas is injected by injecting urea water into a Glen tank (5) mounted on the fuselage frame (1) and a flow path of the exhaust gas discharged from the engine (E). An SCR catalyst part (52) for purifying oxides, and a urea water tank (56) for storing urea water to be supplied to the SCR catalyst part (52), at the lower rear side of the Glen tank (5), It is a combine in which a rear inclined surface (5C) that inclines forward is formed, and the urea water tank (56) is disposed below the rear inclined surface (5C).

The invention according to claim 2 is the combine according to claim 1, wherein the urea water tank (56) is supported by a Glen tank (5).
According to a third aspect of the present invention, an intermediate part of a supply hose (58) connecting the urea water tank (56) and the SCR catalyst part (52) is provided with a glen tank (5) with respect to the body frame (1). The combine according to claim 2, wherein the combine is supported on a support frame (40) that is rotatably supported.

  According to a fourth aspect of the present invention, a threshing device (3) is mounted on a side part of the grain tank (5) on the body frame (1), and the SCR catalyst part (52) is threshed with the grain tank (5). The combine according to claim 1, 2 or 3, wherein the combine is arranged at a position between the devices (3) and behind the second threshing device (27) provided in the threshing device (3). .

  According to a fifth aspect of the present invention, there is provided a DPF (51) for collecting particulate matter contained in exhaust gas discharged from the engine (E), and a first exhaust for connecting the engine (E) and the DPF (51). A second exhaust pipe (54) connecting the pipe (53), the DPF (51), and the SCR catalyst section (52), and the threshing device (3) is disposed on the front side of the second cerealing device (27). The first cerealing device (26) is provided, and the DPF (51) is located between the grain tank (5) and the threshing device, at the front side of the first cerealing device (26). Item 4. A combine according to item 4.

The invention according to claim 6 is the combine according to claim 5, wherein the DPF (51) is arranged so as to overlap with the first cerealing device (26) in front of the machine body.
The invention according to claim 7 is the combine according to claim 4, claim 5, or claim 6, wherein the SCR catalyst part (52) is arranged so as to overlap with the second cerealing device (27) in the body front view. is there.

  According to the first aspect of the present invention, since the urea water tank (56) is disposed below the rear inclined surface (5C) formed in the lower rear portion of the Glen tank (5), the Glen tank (5) By blocking the hot air, it is possible to prevent the urea water tank (56) from being heated and prevent damage or alteration of the urea water.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the urea water tank (56) is supported by the glen tank (5), so that the urea water tank (56) It is possible to prevent the urea water tank (56) from being damaged by the vibration of the machine body frame (1). When the Glen tank (5) is rotatably supported with respect to the machine body frame (1), the urea water tank (56) can be moved from the machine body together with the Glen tank (5). Replenishment of urea water and maintenance of the urea water tank (56) can be easily performed.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the supply hose (58) is bent or caught when the urea water tank (56) is moved from the fuselage together with the glen tank (5). As a result, the durability of the supply hose (58) is increased, the supply state of urea water to the SCR catalyst unit (52) is stabilized, and the exhaust gas purification efficiency of the SCR catalyst unit (52) is improved. Can be kept high.

  According to invention of Claim 4, in addition to the effect of the invention of Claim 1 or Claim 2 or Claim 3, the SCR catalyst part (52) is placed between the grain tank (5) and the threshing device (3). Since it is located at a position behind the second threshing device (27) provided in the threshing device (3), the urea water tank (56) and the SCR catalyst part (52) are brought close to each other, The urea water supply pipe can be shortened so that the urea water can be smoothly supplied to the SCR catalyst section (52).

  According to the invention of claim 5, in addition to the effect of the invention of claim 4, the DPF (51) is a position between the grain tank (5) and the threshing device, and the first cerealing device (26). It can suppress that the hot air which generate | occur | produces from DPF (51) used as high temperature toward back is arrange | positioned by the position of the front side of this, and can prevent the deterioration of urea water more effectively.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the DPF (51) is arranged so as to overlap the first cerealing device (26) when viewed from the front of the machine body. The movement of the hot air (51) to the urea water tank (56) side can be further suppressed, and alteration of the urea water can be prevented. Moreover, the width of the airframe in the left-right direction can be narrowed to make it compact.

  According to the invention described in claim 7, in addition to the effect of the invention described in claim 4 or claim 5 or claim 6, the SCR catalyst part (52) is connected to the second cerealing device (27) in the body front view. Since it arrange | positions so that it may overlap, the heating of the urea water tank (56) by the hot air of a SCR catalyst part (52) can be suppressed.

It is a side view of a combine. It is a top view of a combine. It is a side view of a combine. It is a front view which shows the principal part of a combine. It is a side view which shows the principal part of a combine. It is a rear view which shows the principal part of a combine. It is a side view which shows the principal part of a combine. It is a top view which shows the principal part of a combine. It is a top view which shows the principal part of a combine.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, although the direction is shown and demonstrated for convenience for easy understanding, the configuration is not limited by these.

  As shown in FIGS. 1 to 3, the combine is a so-called normal combine that throws all the harvested culm into a thresh, and as shown in FIG. A traveling device 2 composed of a pair of left and right crawlers is provided, and a threshing device 3 that performs threshing / sorting is provided on the upper left side of the machine body frame 1. A mowing device 4 is provided. The cereals harvested by the reaping device 4 are transferred to the full culling type threshing device 3 by the transport elevator 7 arranged on the rear side of the reaping device 4, and the grains threshed and sorted by the threshing device 3 Is stored in a Glen tank 5 provided on the right side of the threshing device 3. The grains temporarily stored in the Glen tank 5 are discharged out of the machine by the discharge device 8.

Further, a control unit 6 on which an operator gets on is provided on the upper right side of the body frame 1, and an engine room in which an engine E is stored is provided below the control unit 6.
Note that the traveling speed of the traveling device 2 can be changed steplessly by the shift lever of the control unit 6.

The reaping device 4 is movable up and down with respect to the machine body, and has a weed body on both the left and right sides for weeding cereals to be planted in a field, and a reaping object introduced between the left and right weed bodies A table 11 for receiving the cereals and a scraping reel 13 for scraping the cereals that have been weeded with the weeds into the table 11. The table 11 has a cutting blade device 12 that cuts the cereals at a predetermined height at the bottom thereof, and the cereals that have been scraped by the scraping reel 13 and cut by the cutting blade device 12 are transported from the table 11 to the elevator. 7 is provided with a scraping auger that is fed to the front end portion of 7.
<Threshering device>
As shown in FIG. 3, the threshing apparatus 3 includes a handling chamber 20 that threshs the cereal at the top, and a sorting chamber 21 that sorts the threshed grains below the handling chamber 20.

  The handling chamber 20 has a conveying spiral 25A that conveys the cereals thrown into the front part backward, and a handling cylinder 25 having a plurality of handling teeth 25B from the middle part to the rear part is pivoted on the front and rear walls. It is rotatably supported on the trunk shaft.

  A swing sorting device 22 is provided in the upper part of the sorting chamber 21, and a lower part of the sorting chamber 21 leaks from the swing sorting device 22, and a red pepper 23 </ b> A that blows air to the sheave at the front of the swing sorting device 22. A first grain collecting device 23B that collects the grain to be lowered and a second grain collecting device 23C that collects the grain to which the branch raft leaking from the swing sorting device is attached are installed in order from the front side.

  The grains collected by the first cerealing device 23B are pumped to the glen tank 6 by the first cerealing device 66 installed on the right side of the threshing device 3. The first cerealing device 26 includes an intake unit 26A that takes in the grain from the first cerealing device 23B, an elevating unit 26B that conveys the grain from the lower part to the upper part, and a discharge unit 26C that communicates with the elevating part 26B. The discharge portion 26 </ b> C communicates with the charging port 5 </ b> A of the Glen tank 5. Moreover, the 1st cerealing apparatus 26 is installed substantially perpendicularly toward the upper part from the base to the space pinched | interposed by the threshing apparatus 3 and the glen tank 5. FIG.

The cereal grains to which branch branches and the like collected by the second cerealing device 23C are attached are transported to the front and rear intermediate portions of the handling chamber 20 by the second cerealing device 27 installed on the right side of the threshing device 5. The second cerealing device 27 includes an intake portion 27A that takes in the grain from the second cerealing device 23C, an elevating unit 27B that conveys the grain from the lower part to the upper part, and a discharge part 27C that communicates with the elevating part 27B. The discharge part 27 </ b> C communicates with the handling chamber 20. Moreover, the 2nd cerealing apparatus 27 is installed substantially perpendicularly toward the upper part from the base to the space pinched | interposed by the threshing apparatus 3 and the glen tank 5. FIG.
<Glentank>
The Glen tank 5 is a container for storing the grains released from the discharge part 26C of the first cerealing device 26 toward the input port 5A. In the lower part of the grain tank 5, a feeding device 30 for sending the stored grain to the discharge device 8 is provided. In order to smoothly guide the grain to the feeding device 30 side, the lower part of the grain tank 5 Is formed with an inclined surface.

Specifically, the front inclined surface 5B that is disposed at the front and slopes rearwardly downward, the rear inclined surface 5C that is disposed at the rear and slopes forwardly downward, and is disposed on the right side (outer side) and is leftwardly lowered. The inclined right portion inclined surface 5D and the left inclined surface 5E arranged on the left side (inner side) and inclined downward to the right guide the grain to the feeding device 30 side.
<Discharge device>
The discharge device 8 is connected to the vertical transfer unit 8A that transfers the grain sent out from the feeding device 30 upward, and the horizontal transfer unit 8B that is connected to the transfer terminal end of the vertical transfer unit 8A and transfers the grain in the horizontal direction. A flexible transfer tube is provided inside the vertical transfer unit 8A and the horizontal transfer unit 8B. In addition, the discharge end for discharging | emitting a grain to the loading platform etc. of a grain transporter vehicle is formed in the transfer termination | terminus part of the horizontal transfer part 8B.

  The lower part of the feeding device 30 communicates with the pressure feeding passage 31. By driving the feeding device 30, the grains are fed into the pressure-feeding passage 31 by a certain amount, and the grains in the pressure-feeding passage 31 are compressed by the compressed air fed from the blower 32 arranged on the front side of the feeding device 30. It is sent out to the vertical transfer unit 8A side.

The blower 32 has a suction port disposed around a DPF 51 described later.
The steering unit 6 is provided with a discharge clutch operating tool, and the operating state of the blower 32 and the feeding device 30 is switched by operating the discharge clutch operating tool.
<Glentank maintenance mechanism>
A support frame 40 that supports the Glen tank 5 so as to be rotatable around a rotation fulcrum 41 is provided at a position behind the Glen tank 5 in the body frame 1. That is, the Glen tank 5 is supported by the upper support portion 42 and the lower support portion 43 that are rotatably supported by the same axis, so that the front portion can move outward (to the left side). It is configured.

  The upper pin 42A provided on the rear wall of the grain tank 5 is fitted into the boss part 42B of the support frame 40, and the boss part 43A provided on the extending frame part 5F fixed to the rear wall of the grain tank 5 is placed below the support frame 40. The side pin 42B is fitted. Therefore, after moving the Glen tank 5 to the outside, it can be removed from the airframe by lifting it upward and separating the upper support portion 42 and the lower support portion 43.

The blower 32 and the feeding device 30 are supported on the glen tank 5 side and move integrally to the outside of the machine body.
<Exhaust treatment device>
In order to purify the exhaust gas discharged from the engine E, an exhaust treatment device 50 is provided between the threshing device 3 and the grain tank 5. The exhaust treatment device 50 includes a DPF 51 (Diesel particulate filter) that collects particulate matter contained in exhaust gas, and urea water that is supplied into a pipe line through which exhaust flows. SCR52 (Selective Catalytic Reduction, selective reduction catalyst) for reacting nitrogen oxides is included. The SCR 52 corresponding to the SCR catalyst unit of the present invention detects a nitrogen oxide amount in the pipe line, and injects urea water into the pipe line according to the amount of nitrogen oxide detected by the detection sensor. The urea water that has a nozzle and is injected into the pipe line is hydrolyzed and converted into ammonia gas, whereby nitrogen oxides are reduced to nitrogen gas and water by the ammonia.

The outer surface of the DPF 51 and the SCR 52 is covered with a heat shield.
The DPF 51 is disposed at a position between the threshing device 3 and the grain tank 5 in the left-right direction and at a position between the engine E and the first cerealing device 26 in the front-rear direction. Further, the SCR 52 is arranged at a position on the rear side of the second cerealing device 27.

Moreover, DPF51 and SCR52 are arrange | positioned so that it may overlap with the 1st cerealing apparatus 26 and the 2nd cerealing apparatus 27 in front view.
The engine E and the DPF 51 are connected by a first exhaust pipe 53, the DPF 51 and the SCR 52 are connected by a second exhaust pipe 54, and a third exhaust pipe (exhaust gas) that releases exhaust gas into the atmosphere is disposed at the rear of the SCR 52. Tube) 55 is connected.

  The second exhaust pipe 54 is connected to the SCR 52 by bypassing the lower side so as to overlap the first cerealing device 26 and the second cerealing device 27 in plan view, and the third exhaust pipe 55 is connected to the SCR 52. It rises in a substantially vertical direction from the rear and extends upward.

  The upper end portion of the third exhaust pipe 55 is preferably formed higher than the upper end portion of the threshing device 3 and lower than the upper end portion of the grain tank 5, and the discharge device 8 swirling around the vertical transfer portion 8A. In order to prevent interference, it is preferable to make it lower than the lower end part of the horizontal transfer part 8B.

Further, the upper end portion of the third exhaust pipe 55 may be curved toward the rear, and in that case, the rear end portion of the third exhaust pipe 55 is slightly rearward of the threshing device 3 from the longitudinal direction of the machine body. It is preferable to install as described above.
<Urea water tank>
A urea water tank 56 for storing urea water to be supplied to the SCR 52 is disposed below the rear part of the Glen tank 5, that is, below the rear inclined surface 5C. A mounting frame 57 that supports the urea water tank 55 is provided on the rear inclined surface.

This mounting frame is provided so as to connect the extending frame portion 5F and the intermediate portion in the vertical direction of the rear inclined surface 5C.
A supply hose 58 for supplying urea water from the urea water tank 56 to the SCR 52 extends rearward from a hole formed in the extending frame portion 5F, and an intermediate portion is supported by the support frame 40 to reach the SCR 52. That is, the intermediate portion of the supply hose 58 is supported in the vicinity of the rotation fulcrum 41 of the Glen tank 5.

  The urea water tank 56 is a first lower space S1 between the first threshing device 23B and the second threshing device 23C in the threshing device 3, or a second lower space S2 behind the second threshing device 23C. It can also be arranged.

A water supply port for replenishing urea water to the urea water tank 56 is opened from between the vertical cerealing portion 8A and the threshing device 3 to the rear together with a fuel supply port of the fuel tank of the engine E.
Moreover, when the urea water tank 56 is arrange | positioned in 1st lower space S1 and 2nd lower space S2, it can also be made to open in the vicinity of the left side surface of the threshing apparatus 3. FIG.
<DPF regeneration control>
The DPF 51 collects fine particles mainly composed of carbon by filtration using a porous filter. When the fine particles are deposited, the filter mesh is blocked, and the exhaust resistance is increased. For this reason, when a state in which a predetermined amount or more of fine particles is accumulated is detected by the differential pressure across the DPF 51, the temperature in the DPF 51 is increased by the intake throttle, engine speed increase, post injection, etc., and the fine particles are burned. (Playback control).

At the time of this regeneration control, the DPF 51 becomes high temperature, so the temperature outside the heat shield also rises.
<Exhaust temperature reduction mechanism>
As shown in FIG. 7, an outer cylinder (exhaust dilution portion) 60 is provided on the outer periphery of the third exhaust pipe 55, and the lower end portion of the outer cylinder 60 (the exhaust gas flow direction in the third exhaust pipe 55). The air duct 61 branched from the air flow path from the blower 32 is connected to the upper part).

  That is, as shown in FIG. 8, a switching valve 70 that switches the blower 32 from the blower 32 side to the blower duct 61 side is provided in the pumping passage 31 that connects the blower 32 and the feeding device 30. The switching valve 70 includes a lever portion (manual operation portion) 71A that is manually operated by the operator from the outside of the machine body, and an interlocking arm portion 71B that is connected to the actuator 73. A rotatable switching operation mechanism 71 is provided, and the air passage is switched by rotating a valve body (not shown) provided in the switching valve 70 integrally with the rotating shaft 71C.

  The actuator 73 is a string-wound spring made of a shape memory alloy, and the rod 72 connected to the interlocking arm portion 71B extends when the temperature around the DPF 51 rises above a predetermined temperature, so that the valve body in the switching valve 70 is By turning around the turning shaft 71C, the air path is switched to the air duct 61 side. The actuator 73 starts to expand from about 200 degrees Celsius.

  Although not shown, the combine has detection means for detecting the operating state of the actuator 73 or the rotation angle of the valve body around the rotation shaft 71C, and the switching valve 70 is on the air duct 61 side. Is detected (when a state in which the angle of the valve body is the angle on the side that blows air to the blower duct 61 is detected more than a predetermined value), the blower 32 is automatically driven by the driving force of the engine E ( Exhaust dilution state).

  In the state where the blower 32 is driven and the switching valve 70 is switched to the air duct 61 side, air flows from the air duct 61 into the outer cylinder 61, and the temperature around the third exhaust pipe 55 is reduced. 3 At the lower end (upper end) in the exhaust flow direction of the exhaust pipe 55, the hot exhaust gas and the relatively low temperature air from the blower 32 are mixed and discharged out of the apparatus, whereby the outlet temperature of the exhaust gas Reduce.

  Further, in the exhaust dilution state, when the operation of the discharge clutch operating tool of the control unit 6 is performed, the feeding device 30 is restrained from being driven, and the operator is notified by an alarm device or the like.

  The actuator 73 may be one that uses electric power or one that uses fluid pressure. In this case, when the temperature detected by a temperature sensor installed around the DPF 51 exceeds a predetermined value, The exhaust dilution state is preferably made to appear when the regeneration control execution is detected.

  Then, as the control mode when the operation of the exhaust clutch operating tool is performed in the exhaust dilution state, the driving of the feeding device 30 is checked as described above, or the switching valve 70 is switched to the feeding device 30 side. Either the driving device 30 is driven, or the operator is instructed to instruct whether or not the exhaust dilution state can be continued.

It is also preferable to provide forcible switching means for forcibly switching the switching valve 70 regardless of the switching state by the actuator 73.
<Second Mode of Exhaust Treatment Device>
In the second aspect, as shown in FIG. 9, the DPF 51 of the exhaust treatment device 50 is between the first cerealing device 23 </ b> B and the second cerealing device 23 </ b> C, and is formed in the lower part of the threshing device 3. It is arranged in the space S1, and the SCR 52 is behind the second threshing device 23C and is different from the first aspect in that it is arranged in the second lower space S2 formed in the lower part of the threshing device 3. . The first exhaust pipe 53 extends rearward from the engine E, passes below the first cerealing device 26, is connected to the DPF 51, and the second exhaust pipe 54 is located on the outer side (right side) of the threshing device 3. It is routed around. The third exhaust pipe 55 extends from the SCR 52 to the inside (left side) of the threshing device 3, extends upward from between the threshing device 3 and the glen tank 5, and reaches the upper side of the upper end of the threshing device 3.

DESCRIPTION OF SYMBOLS 1 Airframe frame 3 Threshing apparatus 5 Glen tank 5C Rear inclined surface 26 1st cerealing apparatus 27 2nd cerealing apparatus 51 DPF
52 SCR
53 First exhaust pipe 54 Second exhaust pipe 56 Urea water tank 58 Supply hose

Claims (7)

Glen tank (5) mounted on the fuselage frame (1),
An SCR catalyst unit (52) for purifying nitrogen oxides in the exhaust gas by injecting urea water into the flow path of the exhaust gas discharged from the engine (E), and urea water supplied to the SCR catalyst unit (52) A urea water tank (56) for storing
A combine in which a rear inclined surface (5C) inclined forward and downward is formed in a rear lower portion of the Glen tank (5), and the urea water tank (56) is arranged below the rear inclined surface (5C). The combine according to claim 1, wherein the urea water tank (56) is supported by a Glen tank (5). A support frame for rotatably supporting the glen tank (5) with respect to the fuselage frame (1), an intermediate portion of the supply hose (58) connecting the urea water tank (56) and the SCR catalyst unit (52). The combine according to claim 2 supported by (40). The threshing device (3) is mounted on the side part of the Glen tank (5) on the fuselage frame (1),
The said SCR catalyst part (52) was arrange | positioned in the position between a grain tank (5) and a threshing apparatus (3), and the back position of the 2nd cerealing apparatus (27) with which a threshing apparatus (3) is equipped. The combine according to claim 1 or claim 2 or claim 3. A DPF (51) that collects particulate matter contained in exhaust gas discharged from the engine (E), a first exhaust pipe (53) that connects the engine (E) and the DPF (51), and a DPF ( 51) and a second exhaust pipe (54) connecting the SCR catalyst part (52),
The threshing device (3) has a first threshing device (26) on the front side of the second threshing device (27),
The combine according to claim 4, wherein the DPF (51) is disposed at a position between the grain tank (5) and the threshing device and on the front side of the first threshing device (26). The combine according to claim 5, wherein the DPF (51) is arranged so as to overlap the first cerealing device (26) when the machine body is viewed from the front. The combine of Claim 4 or Claim 5 or Claim 6 arrange | positioned so that the said SCR catalyst part (52) may overlap with a 2nd cerealing apparatus (27) in an airframe front view.

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