JP2014108065A - Combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the temperature of exhaust gas discharged from an exhaust gas cleaning device.SOLUTION: A combine includes: a grain tank (5) mounted on a machine body frame (1); a discharge device (8) for discharging grains accumulated in the grain tank (5) to the outside of the machine; a blower (32) for supplying compressed air for conveying grains to the discharge device (8); a DPF (51) for collecting a particulate material contained in exhaust gas discharged from an engine (E); an exhaust pipe (55) for discharging the exhaust gas purified by the DPF (51) to the outside of the machine; an exhaust gas dilution part (60) for mixing the exhaust gas discharged from the exhaust pipe (55) with ambient air and lowering the temperature of the exhaust gas; and a switch valve (70) that can be switched between a state in which the compressed air from the blower (32) is supplied to a discharge device (8) side and a state in which it is supplied to an exhaust gas dilution part (60) side.

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 gas purification apparatus according to the invention described in Patent Document 1 has a problem that safety is low in the vicinity of the exhaust pipe end portion because the exhaust gas is discharged at a high temperature from the exhaust gas purification apparatus.

  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.
The invention according to claim 1 is a Glen tank (5) mounted on the fuselage frame (1), a discharge device (8) for discharging grains stored in the Glen tank (5) to the outside of the machine, A blower (32) for supplying compressed air for conveying the grain to the discharge device (8), a DPF (51) for collecting particulate matter contained in the exhaust gas discharged from the engine (E), and the DPF An exhaust pipe (55) for exhausting the exhaust gas purified in (51) to the outside of the apparatus, and an exhaust dilution section (60) for reducing the temperature by mixing outside air with the exhaust gas exhausted from the exhaust pipe (55) And a combiner having a switching valve (70) that can be switched between a state in which compressed air from the blower (32) is supplied to the exhaust device (8) and a state in which the compressed air is supplied to the exhaust dilution section (60). is there.

  In the invention according to claim 2, when the regeneration control for removing the particulate matter collected by the DPF (51) is executed, the switching valve (70) removes compressed air from the exhaust dilution part (60) side. The combine according to claim 1, wherein the combine is automatically switched to a state to be supplied to the vehicle.

  According to a third aspect of the present invention, when the ambient temperature of the DPF (51) becomes equal to or higher than a predetermined temperature, the switching valve (70) automatically supplies compressed air to the exhaust dilution section (60). The combine according to claim 1, wherein the combine is configured to be switched to.

  The invention according to claim 4 includes an actuator (73) made of a shape memory alloy for switching the switching valve (70) to a state in which compressed air is supplied to the exhaust dilution section (60), and the actuator (73) is The arrangement is such that the actuator is installed in the vicinity of the DPF (51) and the switching valve (70) is switched when the ambient temperature of the DPF (51) exceeds a predetermined temperature. Or it is a combine of Claim 3.

  The invention according to claim 5 is the combine according to any one of claims 1 to 4, further comprising a manual operation section (71A) for manually switching the switching valve (70).

  According to the first aspect of the present invention, the exhaust dilution unit (60) for reducing the temperature by mixing the outside air with the exhaust gas discharged from the exhaust pipe (55), and the discharge device for the compressed air from the blower (32) (8) Since it has the switching valve (70) which can be switched to the state supplied to the side and the state supplied to the exhaust dilution part (60), it is discharged out of the machine by the exhaust dilution part (60). The discharge temperature can be lowered, and the safety around the exhaust pipe (55) can be increased. Further, the blower mechanism for supplying air to the exhaust dilution section (60) is also used as the grain discharge blower (32) of the discharge device (8), thereby reducing the cost of the exhaust dilution mechanism and making it compact. Can be provided inexpensively.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, when the regeneration control of the DPF (51) is executed, the switching valve (70) supplies the compressed air to the exhaust dilution section (60). ) Is automatically switched to the state of supply to the exhaust gas side, so that when the temperature of the exhaust gas discharged from the exhaust pipe (55) rises, exhaust dilution is performed to further increase the safety around the exhaust pipe (55). Can do.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, when the ambient temperature of the DPF (51) becomes a predetermined temperature or higher, the switching valve (70) supplies the compressed air to the exhaust dilution section. Since it automatically switches to the state of supplying to the (60) side, exhaust dilution is performed when the temperature of the exhaust gas discharged from the exhaust pipe (55) increases to further enhance the safety around the exhaust pipe (55). Can be increased.

  According to the invention of claim 4, in addition to the effect of the invention of claim 1 or claim 3, when the ambient temperature of the DPF (51) becomes a predetermined temperature or higher, the actuator (73 made of shape memory alloy) ) Is activated to switch the switching valve (70), so that a configuration in which the switching valve (70) is automatically switched can be realized at low cost, and an electric temperature sensor that is likely to fail due to hot air of the DPF (51). As compared with the case of using an actuator that operates based on this, durability is high, and switching of the switching valve (70) can be ensured.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, it is possible to manually switch the switching valve (70). When combustibles are present, such as when cutting vines or when branches of trees are overhanging in the field, switch the compressed air to the exhaust dilution section (60) side for safe operation by switching the compressed air (70). It can be carried out.

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 has a detection sensor for detecting the amount of nitrogen oxide in the pipe and a nozzle for injecting urea water into the pipe according to the amount of nitrogen oxide detected by the detection sensor. The injected urea water 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.

1 Airframe Frame 5 Glen Tank 8 Discharge Device 32 Blower 51 DPF
55 Third exhaust pipe (exhaust pipe)
58 Supply hose 70 Switching valve 71A Manual operation unit 73 Actuator

Claims (5)

Glen tank (5) mounted on the fuselage frame (1),
A discharge device (8) for discharging the grains stored in the Glen tank (5) to the outside of the machine;
A blower (32) for supplying compressed air for conveying the grain to the discharge device (8);
A DPF (51) that collects particulate matter contained in exhaust gas discharged from the engine (E), an exhaust pipe (55) that discharges exhaust gas purified by the DPF (51) to the outside of the machine,
An exhaust dilution section (60) for reducing the temperature by mixing outside air with the exhaust gas discharged from the exhaust pipe (55);
A combine having a switching valve (70) capable of switching between a state in which compressed air from the blower (32) is supplied to the discharge device (8) side and a state in which the compressed air is supplied to the exhaust dilution part (60) side. When the regeneration control for removing the particulate matter collected by the DPF (51) is executed, the switching valve (70) automatically supplies compressed air to the exhaust dilution section (60). The combine according to claim 1, wherein the combiner is configured to be switched. The configuration in which the switching valve (70) automatically switches to a state in which compressed air is supplied to the exhaust dilution section (60) when the ambient temperature of the DPF (51) becomes equal to or higher than a predetermined temperature. Combine according to 1. An actuator (73) made of a shape memory alloy that switches the switching valve (70) to a state in which compressed air is supplied to the exhaust dilution section (60) is provided, and the actuator (73) is disposed in the vicinity of the DPF (51). And
The combine according to claim 1 or 3, wherein when the ambient temperature of the DPF (51) becomes equal to or higher than a predetermined temperature, the actuator (73) is operated to switch the switching valve (70). The combine according to any one of claims 1 to 4, further comprising a manual operation section (71A) for manually switching the switching valve (70).

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