JP2019080520A - Grain tank of combine - Google Patents

Abstract

To provide a grain tank of a combine in which the deposit of waste straw to a DOC and an SCR catalyst and the effect of hot air to a steering unit can be reduced, the reduction of grain storage capacity with mounting of the DOC and the SCR catalyst is decreased, and thereby the working efficiency can be increased.SOLUTION: A grain tank of a combine is mounted at left and right one side of a machine body frame (1) provided with an engine (E). A recess (19) which a DOC (21) for oxidizing non-combustion gas in an exhaust-gas in the engine (E) invades with a posture having an exhaust-gas flow direction being directed to the vertical direction is formed in a lower front side of this grain tank (7). Also, on the lower side of the recess (19), an SCR catalyst (22) for reducing and purifying a nitrogen oxide in an exhaust-gas after passing through the DOC (21) using ammonia is configured to be arranged with a posture having the exhaust-gas flow direction being directed in the longitudinal direction of the machine body.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a grain tank of a combine equipped with an exhaust gas purification device.

  In the conventional combine, an exhaust gas purification apparatus provided with a DOC having a catalyst for oxidizing unburned gas in exhaust gas burned by an engine and an SCR catalyst for purifying nitrogen oxides in the exhaust gas after passing through the DOC is provided. Technology is known. (Patent Document 1)

Unexamined-Japanese-Patent No. 2016-131547

  However, in the technique of Patent Document 1, the DOC is disposed opposite to the threshing device in a posture in which the exhaust gas flow direction is directed in the vertical direction, and the SCR catalyst is arranged on the upper side of the grain tank storing the grain. Because it is oriented in the width direction (left and right direction) of the fuselage, the high temperature DOC and SCR catalyst are exposed at the high position of the fuselage, and there is a problem in the accumulation of scale and the influence of hot air on the control part. In addition, there is a problem that it becomes difficult to mount DOC and SCR catalyst to the airframe.

  On the other hand, when DOC and the SCR catalyst are arranged at the lower part on the airframe frame between the threshing device and the grain tank, the space between the threshing device and the grain tank is narrow. It is possible to do.

  However, in this case, it is necessary to make the inclined bottom wall formed in the lower part of the gren tank largely indented in the front and rear direction and the left and right direction, and to insert the DOC and the SCR catalyst into this concavity. There is a problem that the capacity of the tank decreases and the efficiency of harvesting and threshing operations decreases.

  Therefore, the main object of the present invention is to reduce deposition of scale on DOC and SCR catalyst and the influence of hot air on the control unit, and to reduce the reduction in grain storage capacity accompanying the loading of DOC and SCR catalyst. It is about providing the grain tank of the combine which can improve efficiency.

  The present invention which solved the above-mentioned subject is as follows.

  That is, the invention according to claim 1 is the grain tank of the combine mounted on the left and right sides of the machine body frame (1) provided with the engine (E), and the above-mentioned lower part of the grain tank (7) The DOC (21) for oxidizing the unburned gas in the exhaust gas of the engine (E) forms a recess (19) in which the exhaust gas is directed in the vertical direction, and the recess (19) is formed. It is a gren tank.

  The invention according to claim 2 is characterized in that the SCR catalyst (22) for reducing and purifying nitrogen oxides in the exhaust gas after passing through the DOC (21) with ammonia under the recess (19) is the exhaust gas. It is a gren tank of the combine according to claim 1 which is arranged in the posture which turned the direction of gas circulation to the direction of the body back and forth.

  The invention according to claim 3 is characterized in that a connecting pipe (12) for connecting the exhaust outlet of the DOC (21) and the exhaust inlet of the SCR catalyst (22) is disposed in the recess (19). It is a grain tank of the combine according to claim 2 which is.

  The invention as set forth in claim 4 is characterized in that the lower part of the exhaust pipe (26) connected to the exhaust outlet of the SCR catalyst (22) is disposed in the recess (19). The gren tank of

  The invention according to claim 5 is the glen tank of the combine according to claim 4, wherein the lower portion of the exhaust pipe (26) and the connection pipe (12) intersect in a plan view in the recess (19). .

  According to the first aspect of the present invention, the DOC 21 which oxidizes unburned gas in the exhaust gas of the engine E in the lower part on the front side of the glen tank 7 intrudes in a posture in which the exhaust gas flow direction is vertically directed. Since 19 is formed, the high temperature DOC 21 is disposed at a low position of the airframe, and by invading into the recess 19 of the grain tank 7, it is difficult to deposit scale and the influence of the hot air on the control part is reduced. . Moreover, the reduction amount of the grain tank 7 capacity by formation of the recessed part 19 can be made small, and the efficiency of a mowing threshing operation can be raised.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the SCR catalyst 22 purifies the nitrogen oxide in the exhaust gas after passing through the DOC 21 with ammonia below the concave portion 19 to purify it. However, since the exhaust gas flow direction is arranged in a posture directed in the longitudinal direction of the airframe, the high temperature SCR catalyst 22 is arranged at a low position of the airframe, and it is difficult to deposit scale, and to the steering portion The effects of the heat of

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, the connecting pipe 12 connecting the exhaust outlet of the DOC 21 and the exhaust inlet of the SCR catalyst 22 is disposed in the recess 19 Therefore, it is difficult to deposit scale on the high temperature connecting pipe 12, and the influence of the heat on the control unit is also reduced. Further, the connecting pipe 12 can be configured to be short, and a decrease in the temperature of the exhaust flowing into the SCR catalyst 22 can be reduced, and the exhaust gas purification operation by the SCR catalyst 22 can be appropriately maintained.

  According to the fourth aspect of the invention, in addition to the effects of the third aspect of the invention, the lower portion of the exhaust pipe 26 connected to the exhaust outlet of the SCR catalyst 22 is disposed in the recess 19. The scale is less likely to deposit on the lower part of the exhaust pipe 26 which is at a high temperature, and the influence of the heat on the control unit is also reduced.

  According to the fifth aspect of the invention, in addition to the effects of the fourth aspect of the invention, the lower portion of the exhaust pipe 26 and the connection pipe 12 intersect in a plan view in the recess 19. The degree of freedom of the connection position of the connection pipe 12 is enhanced.

It is a left view of a combine. It is a right side view of a combine. It is a right side view explaining an exhaust gas purification device. It is a top view explaining an exhaust gas purification device. It is a rear view explaining an exhaust gas purification device. It is a left view explaining DOC and SCR. It is a top view of FIG. It is a bottom view of FIG. It is a front view of FIG. It is a rear view of FIG. It is a right side view explaining DOC and SCR. It is a left view explaining a crevice of a grain tank. It is a rear view explaining the crevice of a grain tank. It is a right view explaining the transmission part for conveyance spirals. It is a rear view of FIG.

  The present invention will be described with reference to the drawings. In addition, when viewed from the operator, the front is referred to as the front, the rear is referred to as the rear, the right hand is referred to as the right, and the left hand is referred to as the left.

  As shown in FIGS. 1 and 2, the combine is provided with a traveling device 2 consisting of a pair of left and right crawlers traveling on the soil surface below the body frame 1, and harvests the field bales on the front side of the body frame 1. A harvesting device 3 is provided, and a threshing device 4 for threshing and sorting off the cropped grain is provided on the rear left side of the harvesting device 3, and a control unit on which the operator boarding on the rear right side of the harvesting device 3 5 is provided.

  Under the control unit 5 is provided an engine room 6 equipped with an engine E, and on the rear side of the control unit 5 is provided a gren tank 7 for storing threshed and sorted grains. A discharge auger 8 comprising a vertical discharge cylinder 8A extending in the vertical direction for discharging the grain to the outside and a horizontal discharge cylinder 8B extending in the front-rear direction is provided on the rear side.

  As shown in FIGS. 3 to 5, the lower part of the right wall of the threshing apparatus 4 (the outlet of the first transfer spiral weir) and the upper part of the left wall 7B of the gren tank 7 Are communicated by a threshing barrel 9 for transporting the toner to the gren tank 7. In addition, a second raising grain cylinder 10 for reconveying a second thing such as a stabbing grain to the sorting device of the threshing device 4 is provided at a site on the rear side of the grain raising cylinder 9 in the right wall of the threshing device 4 .

  The exhaust gas burned by the engine E is exhausted to the outside after the exhaust gas purification device 20 purifies the impurities in the exhaust gas. The exhaust purification device 20 DOC 21 which is a catalyst for oxidizing unburned gas in the exhaust gas, and ammonia generated from a urea aqueous solution (hereinafter referred to as urea aqueous solution) nitrogen oxide in the exhaust gas exhausted from the DOC 21. Injection device for injecting urea water into a second connection pipe (claimed connection pipe) 12 that communicates with the outlet of the DOC 21 and the inlet of the SCR catalyst 22. A dosing module 23, a supply device (supply module) 24 for supplying urea water to the injection device 23, and a urea water tank 25 for storing urea water supplied to the supply device 24 are provided.

  As shown in FIGS. 6 to 11, the DOC 21 is disposed in a posture in which the longitudinal direction (the “exhaust gas flow direction” in the claims) is vertically directed, and the SCR catalyst 22 is in the longitudinal direction (the “exhaust gas The DOC 21 is disposed on the left side of the front portion of the SCR catalyst 22 in a posture in which the “flow direction” is oriented in the longitudinal direction of the airframe. The DOC 21 is fixed to a vertically extending first support member 31 provided on the right side of the DOC 21, and the SCR catalyst 22 is provided below the SCR catalyst 22 and extends in the front-rear direction. It is fixed to the support member 32.

  The lower portion of the first support member 31 is fixed to the left side portion of the front portion of the second support member 32, and forms a support member 30 having an L shape in a side view. Further, the support member 30 is detachably fixed to a portion on the upper right side in the front portion of the airframe frame 1 by fastening means such as a bolt. Thereby, the DOC 21 and the SCR catalyst 22 can be easily attached to the airframe 1 through the support member 30. In plan view, it is preferable to provide the DOC 21 in the vicinity of the right side of the center line CL in the left-right width direction of the airframe 1. Thereby, the space formed between the threshing device 4 and the grain tank 7 can be effectively utilized.

  In the front view of the airframe, a part of the right side of the DOC 21 faces the upper side of the left of the SCR catalyst 22, and the lower end of the DOC 21 is located at the middle of the SCR catalyst 22 in the vertical direction. The lower portion of the DOC 21 is provided so as to overlap the front portion of the SCR catalyst 22 in a side view of the airframe, and the middle portion in the front-rear direction of the DOC 21 is located at the front end portion of the SCR catalyst 22. Furthermore, in the plan view of the vehicle body, a part of the right side of the DOC 21 is provided to overlap with the left part of the SCR catalyst 22, and the middle part in the front-rear direction of the DOC 21 is located at the front end of the SCR catalyst 22. Thereby, the support member 30 for supporting the DOC 21 and the SCR catalyst 22 can be formed in a small size, and the space occupied by the support member 30 on the upper side of the airframe frame 1 can be reduced. In other words, the exhaust gas purification device 20 by the DOC 21 and the SCR catalyst 22 can be made compact, and the occupied space on the airframe frame 1 can be made small, for example, the capacity of the grain tank 7 can be increased.

  The exhaust port of the engine E and the exhaust gas inlet formed at the lower left portion of the DOC 21 are connected by a connecting pipe 11 having a flexible portion. The exhaust gas outlet formed at the rear side at the top of the DOC 21 and the inlet formed at the upper side at the rear of the SCR catalyst 22 are connected by a connecting pipe 12 having flexible portions at both ends. There is. In addition, the injection device 23 is provided at the upstream side of the connecting pipe 12, and the outlet formed at the upper side of the front portion of the SCR catalyst 22 is an exhaust gas purified by the DOC 21 and the SCR catalyst 22. An exhaust pipe 26 for exhausting to the outside is connected.

  As shown in FIGS. 3 to 5, in a side view of the airframe, the DOC 21 and the SCR catalyst 22 are provided between the front wall of the gren tank 7 and the threshing drum 9, and on the right side of the right wall of the threshing device 4, the DOC 21 and the SCR Almost the whole of the exhaust gas purification device 20 including the catalyst 22 is provided in a recess 19 formed on the lower front side of the left wall 7B of the glen tank 7. As a result, the DOC 21 and the SCR catalyst 22 can be disposed while suppressing a decrease in the capacity of the gren tank 7, and scale deposits on the DOC 21 and the SCR catalyst 22, rain water, direct sunlight, high pressure water at the time of car washing directly hit Can be suppressed.

  The injection device 23 is fixed to the upper portion at the front of the connection pipe 12 by being inclined rearward and downward. As a result, urea water can be efficiently injected from the injection device 23 to the connection pipe 12 provided to be inclined rearward. Further, the water supply port of the injection device 23 and the water supply port of the supply device 24 are connected by a flexible hose 13. Further, the front portion of the hose 13 is disposed above the injection device 23. As a result, even when the urea water is frozen, a predetermined amount of unfrozen urea water can be supplied to the injection device 23.

  The supply device 24 is provided in the vicinity of the right side of the lower part of the centering barrel 10. As a result, it is possible to easily place the hose 13 on the right side of the barrel 9 by diverting the barrel 9.

  The water supply port of the supply device 24 and the drainage port of the urea water tank 25 are connected by a flexible hose 14. Also, the hose 14 is disposed above the supply device 24. As a result, even when urea water is frozen, a predetermined amount of non-frozen urea water can be supplied to the supply device 24. In addition, an on-off valve is provided in an internal pipe between the water supply port and the drainage port of the supply device 24, and a harness 15 for operating the on-off valve is connected to the on-off valve. Thus, when the urea water stored in the urea water tank 25 becomes lower temperature or higher temperature than a predetermined temperature, the on-off valve is closed to stop the supply of urea water from the urea water tank 25 to the supply device 24. be able to.

  The urea water tank 25 is provided between the rear wall of the gren tank 7 and the vertical discharge cylinder 8A. Further, the urea aqueous solution tank 25 is provided at a position shifted to the right from the center in the lateral width direction of the grain tank 7, and the water supply port 25A of the urea aqueous solution tank 25 is formed at the right area It is done. Thus, urea water can be easily replenished from the water supply port 25A of the urea water tank 25, and the urea water tank 25 can be prevented from colliding with the outside and being damaged.

  At the bottom of the grain tank 7, a conveyance spiral for conveying the grain leaked from the grain tank 7 to the rear side is provided, and at the rear of the conveyance spiral, a front communication portion 16 is formed. Further, a rear communication portion 17 is formed in the lower portion of the vertical discharge cylinder 8A. When the glen tank 17 is in the storage position on the machine frame 1, the front communication portion 16 and the rear communication portion 17 are in communication, and the front portion of the gren tank 17 is in the open position moved to the right of the machine frame 1. In this case, the communication between the front communication portion 16 and the rear communication portion 17 is released.

  The urea water tank 25 is provided on the upper side of the front communication portion 16, and the outlet of the urea water tank 25 is disposed on the upper side of the water supply port of the supply device 24. Thereby, the space formed on the upper side of the front side communication portion 16 can be effectively used, and the urea water can be easily supplied from the urea water tank 25 to the supply device 24. The urea water tank 25 is mounted on a plate-like support 18 supported by a support member extending from the rear communication portion 17 to the upper front side.

  The exhaust pipe 26 extends upward from the outlet formed at the front of the SCR catalyst 22 and reaches the right of the upper part of the DOC 21, and then from the right of the upper part of the DOC 21 to the upper of the rear left And extends above the connecting pipe 12 to the front side of the substantially middle portion in the vertical direction of the grain tray 9. Then, it extends toward the front upper part along the front side of the lift barrel 9 from the front side of the substantially middle part of the lift barrel 9 in the vertical direction, and the exhaust port 26A of the exhaust pipe 26 is the upper end portion of the lift barrel 9 The grain discharge port 9A is exposed to the upper part of the grain tank 7 above the grain discharge port 9A. The exhaust pipe 26 is fixed to the raised grain cylinder 9 at a plurality of locations in the vertical direction. As a result, the length of the connecting pipe 12 can be shortened, and the exhaust pipe 26 can be fixed to the raised grain cylinder 9 to reduce the fixing member for the exhaust pipe 26.

  A fuel tank 35 for storing light oil to be supplied to the engine E is provided at the lower rear side of the threshing device 4. The fueling port 35 A of the fuel tank 35 is formed at the left side portion of the upper portion of the fuel tank 35. Thus, light oil can be easily replenished from the fuel supply port 35A of the fuel tank 35.

  With the water supply port 25A of the urea water tank 25 facing the right side of the machine and the fuel supply port 35A of the fuel tank 35 facing the left side of the machine, the water supply port 25A of the urea water tank 25 is the fuel tank 35 in the vertical direction. It is provided at a position higher than the fuel supply port 35A. As a result, it is possible to prevent the urea aqueous solution tank 25 from being erroneously replenished with light oil.

  A moisture sensor 36 for measuring the moisture content contained in the grains discharged from the grain raising barrel 9 into the grain tank 7 is provided at a portion of the rear wall of the grain tank 7 above the urea water tank 25. Thereby, the space formed above the urea aqueous solution tank 25 can be effectively utilized.

  Next, the recess 19 formed in the left wall 7B of the glen tank 7 will be described. As shown in FIGS. 12 and 13, the recess 19 is formed of a first recess 70 and a second recess 80.

  In a lower portion of the left wall 7B of the glen tank 7, a first concave portion 70 whose front side and left side are open is formed in a portion on the front side of the grain-raising cylinder 9 in the lower portion. The first recess 70 includes a first inclined wall 71 extending downward from the lower end of the front portion of the left wall 7B to the lower right, and a first vertical wall extending downward from the lower end of the first inclination wall 71 A wall 72 and a first rear wall 73 connecting the rear end of the first inclined wall 71 and the rear end of the first vertical wall 72 are formed.

  A second recess 80 is formed on the upper side of the rear of the first recess 70, that is, the upper side of the rear of the first inclined wall 71. Thereby, the rigidity of the grain tank 7, in particular, the first inclined wall 71 can be enhanced, and the deformation of the first inclined wall 71 can be prevented.

  The second recess 80 includes a second horizontal wall 81 extending from the upper end of the rear portion of the first inclined wall 71 to the right, and a second extending from the right end of the second horizontal wall 81 to the lower right An inclined wall 82, a second vertical wall 83 extending downward from the lower end of the second inclined wall 82, a front end of the second horizontal wall 81, the second inclined wall 82, and the second vertical wall 83 A second front wall 84 is connected, a second horizontal wall 81, a second inclined wall 82, and a second rear wall 85 connecting rear end portions of the second vertical wall 83. As a result, the middle portion in the vertical direction of the exhaust pipe 26 connected to the outlet of the SCR catalyst 22 can be inserted into the second recess 80. The second inclined wall 82 is preferably formed in parallel with the first inclined wall 71, and the inclination angle of the second inclined wall 82 is more preferably set to the repose angle.

  Further, as shown in FIG. 4 and FIG. 5, the DOC 21 intrudes into the recess 19 formed on the lower front side of the above-mentioned grain tank 7 in a posture in which the exhaust flow direction is directed in the vertical direction. That is, the upper portion of the DOC 21 is configured to enter the recess 19.

  This makes it difficult to deposit scale on the DOC 21 and reduces the influence of hot air on the control unit. Moreover, the reduction amount of the grain tank 7 capacity by formation of the recessed part 19 can be made small, and the efficiency of a mowing threshing operation can be raised.

  Further, the SCR catalyst 22 is disposed below the recess 19 in a posture in which the exhaust gas flow direction is directed in the longitudinal direction of the airframe.

  As a result, the SCR catalyst 22 which is at a high temperature is disposed at a low position of the airframe, scale deposits are less likely to be deposited, and the influence of hot air on the control portion is also reduced.

  Further, in the recess 19, a connection pipe 12 connecting the exhaust outlet of the DOC 21 and the exhaust inlet of the SCR catalyst 22 is disposed.

  As a result, it is difficult for scum to be deposited on the connecting pipe 12 which is at a high temperature, and the influence of the hot air on the control unit is also reduced. Further, the connecting pipe 12 can be configured to be short, and a decrease in the temperature of the exhaust flowing into the SCR catalyst 22 can be reduced, and the exhaust gas purification operation by the SCR catalyst 22 can be appropriately maintained.

  Further, in the recess 19, the lower portion of the exhaust pipe 26 connected to the exhaust outlet of the SCR catalyst 22 is disposed.

  As a result, it is difficult for scum to deposit on the lower part of the exhaust pipe 26 which is at a high temperature, and the influence of heat from the control unit is also reduced.

  Further, in the recess 19, the lower portion of the exhaust pipe 26 and the connection pipe 12 are disposed to intersect in a plan view.

  This increases the degree of freedom in the arrangement of the exhaust pipe 26 and the connection pipe 12.

  As shown in FIGS. 5 and 13, a bottom wall 7A that inclines to the left is provided at the bottom of the glen tank 7, and the space K on the lower side of the bottom wall 7A is viewed in a rear view of the machine. , SCR catalyst 22 is arranged.

  Next, the transmission part 40 which transmits rotation of the engine E to the conveyance spiral of the grain tank 7 is demonstrated.

  As shown in FIGS. 14 and 15, the rotation of the engine E is transmitted to the pulley 41 of the transmission unit 40. A belt 44 is wound around a pulley 43 fixed to the pulley 41 and the input shaft of the gear box 42.

  A support member 45 is provided on the front side of the gear box 42, and a base portion of a tension arm 46 is rotatably fixed to a support shaft 45A horizontally provided below the support member 45. Thus, the tension arm 46 can be simultaneously maintained at the time of maintenance of the gearbox 42.

  An intermediate portion in the front-rear direction of the tension arm 46 is connected to the wire 47 via a spring. The tension of the belt 44 can be adjusted by operating the tension arm 46 via the wire 47 by an operation lever (not shown) provided on the steering unit 5. The wire 47 is formed of a wire rope 47A and an outer 47B that covers the wire rope 47A.

  A support member 48 is provided on the upper side of the gear box 42, and a support shaft 48A provided horizontally on the upper portion of the support member 48 has a substantially middle portion in the front-rear direction of the lever member 49 formed in a substantially V shape. It is slidably fixed. An outer 47B is fixed to a front side portion of the lever member 49, and a connecting portion 50 which connects an operation pipe (not shown) is provided to a rear side portion of the lever member 49. Thereby, when the wire 47 can not be operated by the operation lever of the operation unit 5, the operation pipe is connected to the connecting rod 50, the lever member 49 is rotated, and the tension pulley 46 is rotated via the wire 47. The tension of the belt 44 can be adjusted by operation.

1 Aircraft frame 7 Glen tank 12 second connection pipe (connection pipe)
19 recess 21 DOC
22 SCR catalyst 26 Exhaust pipe E engine

Claims (5)

  It is a grain tank of the combine mounted on the left and right one side of the fuselage frame (1) provided with the engine (E), and not in the exhaust gas of the engine (E) at the lower front side of the grain tank (7). A grain tank for a combine, characterized in that a DOC (21) for oxidizing combustion gas forms a recess (19) which penetrates in a posture in which the exhaust gas flow direction is directed in the vertical direction.   Under the recess (19), an SCR catalyst (22) for reducing and purifying nitrogen oxides in the exhaust gas after passing through the DOC (21) with ammonia has its exhaust gas flow direction in the longitudinal direction of the machine body The combine tank according to claim 1, wherein the combine tank is arranged in a facing posture.   The combination according to claim 2, wherein a connecting pipe (12) for connecting the exhaust outlet of the DOC (21) and the exhaust inlet of the SCR catalyst (22) is disposed in the recess (19). Glen tank.   The glen tank of the combine according to claim 3, wherein the lower part of the exhaust pipe (26) connected to the exhaust outlet of said SCR catalyst (22) is arranged in said crevice (19).   The glen tank of the combine according to claim 4, wherein the lower part of the exhaust pipe (26) and the connection pipe (12) intersect in a plan view in the recess (19).

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