AU595798B2 - Improvements in air seeders - Google Patents
Improvements in air seeders Download PDFInfo
- Publication number
- AU595798B2 AU595798B2 AU56525/86A AU5652586A AU595798B2 AU 595798 B2 AU595798 B2 AU 595798B2 AU 56525/86 A AU56525/86 A AU 56525/86A AU 5652586 A AU5652586 A AU 5652586A AU 595798 B2 AU595798 B2 AU 595798B2
- Authority
- AU
- Australia
- Prior art keywords
- air
- delivery tube
- vent
- air seeder
- seeder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000003337 fertilizer Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009331 sowing Methods 0.000 description 6
- 230000002411 adverse Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000009416 shuttering Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/04—Fertiliser distributors using blowers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Sowing (AREA)
Description
-1 1 i ii rr*.
COMMONWEALTH OF AUSTRALIA Patents Act 1952 COMPLETE SPECIFICATION (Original) FOR OFFICE USE Application Number: PH00519 Lodged: 10/05/85 Complete Specification Lodged: Accepted: Published: Priority: Class Int. Class 5 Q 7 Q o J is dcument contains the anendments made un der u" nder Siecton 49 and Is correct for printing.
Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: Actual Inventor: Address for Service:- CHAMBERLAIN JOHN DEERE PTY LTD 72-83 Welshpool Road, Welshpool, in the State of Western Australia, Commonwealth of Australia.
RAYMOND JOHN HILL Wray Associates Primary Industry House 239 Adelaide Terrace Perth Western Australia 6000.
Complete Specification for the invention entitled: "AN AIR SEEDER" The following statement is a full description of this invention, including the best method of performing it known to me:- -1t iul .i 2 THIS INVENTION relates to air seeders.
Throughout the specification the term delivery tube shall be taken as the tube or duct provided in an air seeder between the air inlet and the primary divider which is located downstream from the air inlet which in turn is connected to a plurality of hoses or ducts for delivery of the seed and/or fertilizer which is entrained in the air flow to the cultivating tools.
In designing air flow seeders the air delivery parameters a2:e generally chosen such that the seeder may be used with sowing implements having the maximum sowing capacities.
When such seeders however are used with implements having Sea lower sowing capacity the flow of air through the delivery tube is impeded due to the reduced number of oi outlets on the implement and thus the back pressure in the delivery tube increases. This increase of back pressure tt. has in the past caused difficulties when it is desired to
C
deliver material into the delivery tube for distribution to the seed outlets. The back pressure created at this delivery point can produce a positive air flow out of the delivery tube at the point of delivery which causes the fines material from the seed and/or fertilizer which is S: deposited in the delivery tube being blown from the delivery tube into the surrounding environment. This ccCC ejected fines material is usually deposited on the surrounding components of the air seeder which can ultimately lead to failure of such components.
6CC C C C It is an object of this invention to provide a means in an air flow seeder whereby the connection of the air seeder to sowing implements of varying capacities may be readily accommodated without producing an adverse back pressure in _L i i ii 2a the delivery tube which results in a positive air flow out of the delivery tube at the point of delivery for said fertilizer and/or seed.
In one form the invention resides in an air seeder having a delivery tube, a vent located in the wall of the delivery tube downstream from the delivery point for seed and/or fertilizer material into said tube and wherein said vent is variable in its degree of opening whereby the velocity of the air flow downstream of the delivery point can be controlled to reduce back pressure that may be created at the delivery point.
4 9 09 9c c c It E Stt C C C C t C I- I -S 11 1 1 1 I 1 3 According to a further preferred feature means are provided across said vent to limit the flow of seed and/or coarse fertilizer material from the delivery tube.
According to a preferred feature of the above feature wherein said means comprises vanes located across said vent which are, transverse to the fluid flow, directed inwardly into the delivery tube and inclined in the direction of the fluid flow.
According to a further preferred feature of the invention the vent is associated with an exhaust duct which directs any air flow from said vent away from said air seeder.
The invention will be more fully understood in the light of the following description of one specific embodiment.
L ,The description is made with reference to the accompanying drawings of which: It 4e tt Figure 1 is a sectional elevation of a delivery tube of an air seeder having the embodiment mounted thereto; and Figure 2 is a plan view of the delivery tube of e6|, Figure 1 showing the ducting of the vent.
The embodiment is directed to air seeders having a delivery tube 11 into which seed and/or fertilizer is introduced into the air stream via a venturi 12. The ,venturi 12 comprises a restriction 13 in the delivery tube 11 having an opening 14 formed at the upper side '"il n-P
~I
-II 1:1-- 4 thereof which is associated with a delivery hopper into which seed and/or fertilizer is deposited from a conveyor 16. The delivery tube 11 is connected to the primary dividing head of the sowing implement 17.
In the past there has been a difficulty with air seeders of the type referred to above when it is desired to use the air seeder with an implement, having less than the maximum number of outlets. The resultant reduction in the number of outlets to which the delivery tube 11 is connected results in an increased back pressure being produced at the downstream side of the venturi 12. When seed and/or fertilizer is introduced into the venturi 12 the introduction of such material produces a further back pressure in the delivery tube 11 downstream from the venturi which in turn produces a positive air flow from the delivery tube 11 through the outlet 14 and the hopper 15 at the venturi 12. This positive air flow causes fine particulate material from the seed and/or fertilizer material being deposited into the hopper 20 being blown upwardly out of the hopper 15 into the surrounding environment.
4: 4: 4 4: 4: 14 4 1 4: :4 4:4:C 4: 4: 4:4: 4:44:4 4: 4:4 4:4 4: 4:
I
44t The embodiment provides a vent 18 which is formed in the walls of the delivery tube 11 downstream from the venturi 12 at a location where the effects of the t 4: venturi on the flow of the air and the material within the delivery tube 11 have substantially diminished. The vent 18 is associated with a set of vanes 19 which are mounted across the vent opening, transverse to the direction of fluid flow. The vanes 19 are directed inwardly into the delivery tube and are inclined in the direction of the fluid flow through the delivery tube 11. The vent 18 as associated with a duct 20 located transversely on the exterior wall of the delivery tube 11. Each end of the duct which is associated with an I: i I~ 5 outlet 21, having a shuttering means (not shown) whereby the degree of opening of the outlets 21 can be varied to vary the degree of venting of the delivery tube through the vent 18 and duct 20. If desired the outlets 21 may be associated with a hose or similar ducting by which the air flow from the outlets 21 may be exhausted at some point remote from the delivery tube 11 and the air seeder.
In use the degree of opening of the outlets 21 is adjusted in accordance with the size of the sowing implement with which the air seeder is used and such that the back pressure within the delivery tube 11 is o optimised in order that there is no positive air flow out of the delivery tube at the venturi 12. The presence of the vanes 19 serve to prevent the escape of any seed and/or fertilizer material from the delivery tube 11 while allowing the escape of some air.
It should be appreciated that the scope of the present invention need not be limited to the particular scope of S, 20 the embodiment described above.
t C t C£ L 'c t r:~t~h~cV *,*ili N
Claims (4)
- 2. An air seeder as claimed at claim 1 wherein means are provided across said vent to limit the flow of seed and/or coarse fertilizer material from the delivery tube.
- 3. An air seeder as claimed at claim 2 wherein said means comprises vanes located across said vent transverse to the fluid flow where said vanes are directed inwardly into the delivery tube and are inclined in the direction of the fluid flow.
- 4. An air seeder as claimed at any one of the preceding claims wherein the vent is associated with an exhaust duct which directs any air flow from said vent away from said air seeder. An air seeder as claimed at claim 4 wherein the outlet of said duct has an opening which is variable in its degree of opening.
- 6. An air seeder in air seeders substantially as herein described with reference to the accompanying drawings. DATED this EIGHTEENTH day of JANUARY 1990. CHAMBERLAIN JOHN DEERE PTY LTD Applicant. Wray Associates Perth, Western Australia, Patent Attorneys' for Applicant. ~,r~'-rrcr.vC
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU56525/86A AU595798B2 (en) | 1985-05-10 | 1986-04-23 | Improvements in air seeders |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPH051985 | 1985-05-10 | ||
| AUPH0519 | 1985-05-10 | ||
| AU56525/86A AU595798B2 (en) | 1985-05-10 | 1986-04-23 | Improvements in air seeders |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU5652586A AU5652586A (en) | 1987-11-12 |
| AU595798B2 true AU595798B2 (en) | 1990-04-12 |
Family
ID=25631357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU56525/86A Ceased AU595798B2 (en) | 1985-05-10 | 1986-04-23 | Improvements in air seeders |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU595798B2 (en) |
-
1986
- 1986-04-23 AU AU56525/86A patent/AU595798B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU5652586A (en) | 1987-11-12 |
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