JPS6218202Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, threshing machines were equipped with a suction fan on one side of the dust extraction chamber at the rear of the handling room to suck and discharge straw waste from the dust extraction chamber to the outside of the machine. Since the suction was performed while generating a vortex in front of the suction port, the straw waste that was sucked up backwards and upwards as shown by arrow A in Figure 1, swirled around greatly and moved toward the handling room as shown by arrow B. As it descends and joins the following straw waste,
If the threshing conditions are poor, such as when threshing wet standing grain culms, there is a drawback that the straw waste discharge performance and the separation and sorting performance between waste and grain are significantly reduced.

The present invention provides a dust removal device for a threshing machine that is capable of accurately suctioning and discharging straw waste even under poor threshing conditions, and is capable of preventing deterioration in the separation and sorting performance of straw waste and grains. In a threshing machine that is equipped with a suction fan that rotates upward at the rear side on one side of the dust removal chamber at the rear of the handling room, there are The guide plates that cross the dust extraction chamber are arranged opposite each other so that the lower part is open to form a dust suction chamber whose peripheral wall is spaced outward from the suction port when viewed from the side. A baffle plate is provided on the inner surface of the front guide plate, which is bent so as to be directed toward the center of the suction port when viewed from the side while tilting downward, and which intrudes into a region where the vortex flow in the dust suction chamber descends. It is characterized by being worn.

The embodiment shown in the drawings will be explained below.1
is a handling cylinder mounted on a shaft in the handling room 2, and a feed chain 3 and a clamping rail 4 are provided along the handling port, and a blowing fan 6 installed below the supply port 5 is installed below the receiving net 7. The main sorting air passage 10 goes from the top of the first receiving gutter 8 to the dust removal chamber 9, and the dust exhaust port 1 passes from the bottom of the first receiving gutter 8 to the upper part of the second receiving gutter 11 and the lower part of the dust evacuation chamber 9.
A sub-selecting air passage 13 is formed which blows out to the air.

Reference numeral 14 denotes a swinging sorting body supported on the sorting air path so as to be able to swing back and forth, and includes a flow plate 15 facing the lower surface of the receiving net 7, a series of sorting nets 16, a stroke rack 18 following the flow plate 15, and a dust inlet 19. It is composed of a transfer plate 20 directed from the bottom to the top of the dust removal chamber 9, and a series of dust transfer and sorting bodies 21 consisting of racks.

A suction fan 22 is provided on the side wall of the dust removal chamber 9 opposite to the handling opening.
The front and rear portions of the intake port 23 of No. 2 are provided with a front guide plate 24 whose lower part is bent so as to point toward the lower edge of the intake port 23, and a front guide plate 24 with a forward V-shaped groove (ridge line portion 25a and its upper part). The rear guide plate 25 is formed so that the ridge line part 25a and the upper edge part 25b are inclined so that the side opposite to the suction fan 22 side is in the forward position. By fixing them to both side walls and covering their upper surfaces with the top plate 26, the peripheral wall forms a dust suction chamber formed by the rear guide plate 25, the top plate 26, and the front guide plate 24, and the front guide plate 24 An opening 27 is formed between the lower end of the rear guide plate 25 and the front guide plate 25.
4, an air guide plate 28 is provided on the inner surface of the middle part of the air guide plate 28, which is inclined downwardly and directed toward the approximate center of the intake port 23 when viewed from the side.
is provided protrudingly, and the baffle plate 28 is caused to enter the descending side of the vortex formed by the suction fan 22, which rotates upward at the rear and rotates downward at the front.

Reference numeral 29 denotes an arc-shaped guide plate having both ends screwed to the lower ends of the front guide plate 24 and rear guide plate 25 on the suction fan side, and has an opening 2 connected to the suction port 23.
Part of 7 is closed.

Further, the lower end of the rear guide plate 25 is formed into a receiving guide plate 30 which is inclined diagonally rearward and downward and faces the rear end of the stroller rack 21, and the lower end thereof and the lower edge of the dust exhaust port 12 A dust guide plate 30a is provided in series between the two.

Furthermore, the rear part of the swinging sorter 14 is supported on both side walls by swinging arms 31a, and the base of the swinging arm 31b, which supported the front part, is fixed to a support shaft 32 rotatably supported on the both sides walls. , the tip of the arm 33 that is integral with the boss of the swinging arm 31b is connected to the helical shaft 8a.
A connecting rod 35 is attached to the crank arm 34 attached to the end of the
are connected via.

Reference numeral 36 denotes a baffle plate provided between the upper edge of the outlet of the blower fan 6 and the lower end of the flow plate 15, and a U-shaped cover 37 surrounding the support shaft 32 is welded to the upper surface of the baffle plate. .

Reference numeral 38 denotes a straw discharging chain with a guide rail 39 disposed oppositely on the conveying surface, 40 a swash plate of the No. 4 funnel, and 41 a No. 2 thrower, the discharge port of which is connected to the No. 2 reduction passage leading above the flow plate 15. It is open towards.

Next, to explain the operation, the grain culms that are pinched and conveyed by the feed chain 3 and the pinching rail 4 are threshed by the handling drum 1, and the grains and small straw waste are removed from the receiving net 7 to the flow plate 15. The grains leak upward and are screened by a sorting net 16, while only the grains fall first into the receiving trough 8.

The second material and straw waste remaining on the sorting net 16 are transferred to the transfer plate 18a, where they are sieved and screened by the stroke rack 18, the second material is returned by the second thrower 41, and the straw waste is removed. The dust is discharged from the dust port 12 to the outside of the machine.

Further, the long straw, ear scraps, etc. discharged from the dust port 19 are transferred rearward by a transfer plate 20, and are sieved and sorted by a dust transfer sorting body 21. 18 and joins with the transferred matter from the sorting net 16, and the straw on the dust transfer sorting body 21 is thrown from the rear end.

Most of the straw debris from the dust transfer sorting body 21 and the straw debris blown up from the main sorting air passage 10 are discharged out of the machine by the suction fan 22, and some of them fall onto the stroke rack 18.

At this time, a swirl is generated in the dust suction chamber surrounded by the guide plate 24 and the rear guide plate 25 through the opening 27 and directed toward the suction port 23 of the suction fan 22, and the wind force is generated from the suction port 23. It gets weaker as you get further away.

However, since the feed chain 3 side of the dust suction chamber is gradually narrowed by the rear guide plate 25, the necessary suction and transfer is performed, and the wind force increases as it approaches the suction fan 22, and accordingly the dust suction The chamber is also enlarged, and the straw waste that is sucked in from the opening 27 and sequentially merges into the suction port 2 of the suction fan 22.
It is attracted towards 3. During this suction, the portion of the guiding plate 25 that is separated from the suction fan 22 gradually becomes steeply sloped, so that straw debris does not accumulate even if the wind force becomes weak.

Further, since the guide plate 29 closes the opening 27 near the suction fan 22, the suction air strongly spreads to the other side, and the straw waste below the guide plate 29 bypasses the guide plate 29 and is sucked in. .

When the straw waste sucked into the dust suction chamber from the opening 27 is sucked into the suction port 23, grains that have been primarily sorted and mixed in between the suction port 23 and the rear guide plate during the ascending process are removed. The straw waste falls, passes above the suction port 23, and descends while being guided by the front guide plate 24.

During this descending process, the air guide plate 24 receives the descending straw waste and the vortex generated by the suction fan 22 and guides it into the suction port 23 while sliding it down. That is, opening 2
It will be suctioned and discharged before reaching 7.
Even if the straw waste is wet, it can be reliably discharged to the outside of the machine, and the straw waste in the dust removal chamber 9 can be sucked and discharged without delay without interfering with suction from the opening 27.

Further, some of the long straw and a small amount of grains thrown backward from the rear end of the dust transfer sorting body 21 above collide with the guide receiving plate 30 and disperse while being scattered into the straw rack 18 below. fall on top.

As mentioned above, the present invention is a thresher in which a suction fan that rotates upward at the rear is attached to one side of the dust removal chamber at the rear of the handling room, and the suction fan is installed at the front and rear of the suction port of the suction fan. The guide plates that cross the dust chamber are arranged opposite each other so that the lower part is open to form a dust suction chamber whose peripheral wall is spaced outward from the inlet when viewed from the side, and the lower part of the front guide plate is placed at the lower edge of the inlet. A wind guide plate is attached to the inner surface of the front guide plate, which bends in a downward direction and directs toward the approximate center of the suction port when viewed from the side, and penetrates into the area where the vortex flow in the dust suction chamber descends. Therefore, the straw waste that was inhaled from the opening at the bottom of the front and rear guide plates was caused by the fact that the lower part of the front guide plate was oriented toward the lower edge of the inlet, and the direction of rotation of the suction fan. The grains are sorted by specific gravity while rising along a guide plate spaced backward from the suction port, and the grains remaining in the straw waste can be collected by falling. ,
The straw that has bypassed the area corresponding to the upper part of the inlet is caught by the baffle plate and directed into the inlet in the process of descending along the front guide plate and before reaching the lower end of the rear guide plate. The straw can be reliably introduced and discharged outside the machine, and the dust removal performance can be improved since the straw waste is not carried around by the vortex.

In addition, since the straw waste sucked into the dust suction chamber is not carried around to the lower end of the front guide plate, straw waste can be easily sucked in from the lower end opening of the front and rear guide plates, and the dust can be removed. It is possible to prevent straw waste from stagnation in the chamber and improve the dust sorting performance.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a longitudinal sectional side view of the thresher, and FIG. 2 is a plan sectional view of the same. 2... handling room, 6... blower fan, 14... rocking sorter, 22... suction fan, 24... front guide plate, 25... rear guide plate, 28... wind guide plate.

Claims (1)

[Scope of utility model registration request] In a threshing machine equipped with a suction fan that rotates upward on the rear side on one side of the dust extraction chamber at the rear of the handling room, guide plates that cross the dust extraction chamber are installed at the front and rear of the suction port of the suction fan, respectively. are arranged oppositely so that the lower part thereof is open to form a dust suction chamber in which the peripheral wall is spaced outward from the suction port when viewed from the side, and the lower part of the front guide plate is bent so as to be directed toward the lower edge of the suction port, The threshing device is characterized in that an air guide plate is attached to the inner surface of the front guide plate, and the air guide plate is tilted downward and is directed toward the approximate center of the suction port when viewed from the side, and also penetrates into the part where the vortex flow descends in the dust suction chamber. Machine dust removal device.