CA1222137A - Device for proportioning and feeding powder into barrel of detonation unit - Google Patents
Device for proportioning and feeding powder into barrel of detonation unitInfo
- Publication number
- CA1222137A CA1222137A CA000459966A CA459966A CA1222137A CA 1222137 A CA1222137 A CA 1222137A CA 000459966 A CA000459966 A CA 000459966A CA 459966 A CA459966 A CA 459966A CA 1222137 A CA1222137 A CA 1222137A
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- powder
- nozzle
- barrel
- neutral gas
- 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.)
- Expired
Links
Landscapes
- Nozzles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A device for proportioning and feeding powder into a barrel of a detonation unit comprises a powder con-tainer communicating with a neutral gas pressure source, a bin accommodating two pipes which are coaxial during a powder feed cycle, the first pipe communicat-ing with the powder container and being movable in re-lation to the second pipe which communicates with the barrel of the detonation unit, and a duct for the supply of a neutral gas to the inlet of the second pipe after proportioning of powder is over, which duct ends with a nozzle arranged at the inlet of the second pipe at an angle to its geometrical axis and is provided with a branch pipe whose first end is con-nected to the nozzle, while its second end is connected to the second pipe at some distance from its inlet, the first pipe being designed and arranged so that it is acted on by the neutral gas jet exiting from the nozzle and is thus displaced in relation to the second pipe.
A device for proportioning and feeding powder into a barrel of a detonation unit comprises a powder con-tainer communicating with a neutral gas pressure source, a bin accommodating two pipes which are coaxial during a powder feed cycle, the first pipe communicat-ing with the powder container and being movable in re-lation to the second pipe which communicates with the barrel of the detonation unit, and a duct for the supply of a neutral gas to the inlet of the second pipe after proportioning of powder is over, which duct ends with a nozzle arranged at the inlet of the second pipe at an angle to its geometrical axis and is provided with a branch pipe whose first end is con-nected to the nozzle, while its second end is connected to the second pipe at some distance from its inlet, the first pipe being designed and arranged so that it is acted on by the neutral gas jet exiting from the nozzle and is thus displaced in relation to the second pipe.
Description
~2Z2137 The present invention relates to powder metallurg~
and is more specifically concerned with a device for proportioning and feeding powder into the barrel of a detonation unit.
The device according to the invention is beast applicable to th~ ship-building, aircraft, instru~ent-m~king and other industries where flame spra~ing and detonation spragin~ are used.
~ here is known a device for feeding powder into the barrel of a detonation unit, which comprises a pow-der container communicating with a neutral gas pressure source and connected through a pipe to ~he barrel of the detonation unit. ~he powder is proportioned by an intermittent flow of neutral ~as.
The pipe is provided with an open branch verti-cally arranged in a covered bin and communicating with the atmo-sphere through a throttle (cf. USSR Inven-tor's Certi~icate No 1,007,747).
The device is disadvantageous in that some part o~ the detonation products is directed fro~ the barrel into the powder container. This affects the accuracy of proportioning.
t ~
There is known another device for proportioning and feeding powder into the barrel of a detonation :` ~
~ unit, comprising a powder conta~ner permanently co~-.`~
-- -1222~37 municating with a neutral gas pressure source, a bi~
accommodating two pipes which are coaxial during a powder feed cycle, whereof the first communicates with the powder container, while the second communicates with the barrel of the detonation unit. A neutral air duct is arranged parallel to the two pipes and serves to supply a neutral gas to the inlet o~ the pipe com-municating with the barrel of the detonation unit. The p~pe communicating with the powder container and the neutral gas duct are movable so that they can be al-ternately brought to the pipe communicating with the barrel, for which purpose they are kinematically coupl-ed to a mechanical drive (cf. A.I. Zverev, S.Yu. Shariv-ker, E.A. AstaKhov, "Detonatsionnoye nap~leniye pokry-tiy" /"Detonation Spraying of Coatings"/, Sudostroye~iye Publishers, ~e~ingrad, 1979, pp. 193-194). ~he latter device i8 regarded as the prototype of the one in ac-cordance with the invention.
The prototype device is disadvantageous in that it incorporates a number of movable parts, considering that it contains a mechanical drive kinematically coupl-ed to the pipe communic~ting with the powder container and the neutral ~as duct. Having a number of movable parts, the device is too complicated. The presence of movable parts affects the reliability of the device.
It is an object of the present inve~tion to 3impli~y the design of the device for proportioning and ~eeding ;~ :.::
.:~
lZ2Z~3'7 powder into the barrel of a detonation unit.
It is another object of tne inventio~ to e~hance the relia~ility of the device for proportioning and feeding powder into the barrel of a deto~ation unit.
It is still another object oY the in~ention to imDrove the quality of spray coatings.
~ he i~vention provides a device for proportioning and feeding powder into a barrel of a detonation unit, which comprises a powder container communicating with a neutral ~as pressure source, a bin accommodati~g two pipes which are coaxial during a powder ~eed cycle, whe-reof t~e first communicates with the powder container and is movable in relation to the second pipe communicat-ing with the barrel tof the detonation unit, and a duct for supplying a neutral gas to the inlet o~ the second pipe after a powder proportio~ing operation, which device is c h a r a c t e r i z e d in that the ~eutral gas duct end~ with a nozzle arranged at the iDlet of the second pipe at an angle to its geometrical axis and is provided with a branch whose first end is connected to the nozzle, while its second end is connected to the second pipe at some di~tance from ~ts inlet, the first plpe being arranged s~ that it is acted on by the neutral ~as jet exiting from the nozzle a~d is thus displaced in relatio~ to the Qecond pipe.
~ t i8 preferred that the pipe communicating with the powder container have at its end a member interacting with the neutral gas aet exiting from the nozzle.
This member may be of any geometrical shape. It may be an ellipse, a circle, a triangle, or a sguare.
It may also be of' an irre~ular shape. ~he member inc-reases the area over ~hich the jet of neutral gas acts on the pipe, and thus provides Ior an accurate and trouble-free displacement of the pipe.
It is also preferred that the nozzle be arranged at an angle equal to or greater than 90 to the geometrical axis of the second pipe.
This provides for highly effective purgi~g of the pipe communicating with the barrel.
The device ~ccording to the invention for proportion-ing and feedin~ po~der to a barrel o a detonation unit is simpler in design and more reliable than the proto-type device. It ensures more accurate proportioning of powdered materials than the prototype device.
Other objects and advantages of the present inven-tion w~ll become more apparent from a consideration of the ~ollowing detailed description of a preferred em-bodiment thereof, taken in ~onjunction with the accompan-ying drawings, wherein:
~ IG. 1 is an elevation view of a device in accordance with the invention ~or proportioning and feedi~g powder to a barrel of a detonation unit;
..
~22Z13'7 FIG. 2 is a Yiew taken in the direction of the arrow A i n FIG . 1 .
Referring to the accompanying drawings, the device according to the invention for proportioning and feed-ing powder into ~ barrel of a detonation unit comprises a powder container 1 ~FIG. 1) into which extends a pipe 2 connected to a neutral gas pressure source (not shown). Arran~ed next to the ~owder container 1 is a bin 3 covered with a lid 4 a~d accommodating two pipes, 5 and 6, wnich are coaxial during a powder ~eed cycle. The first pipe 5 com~unicates with the container 1. The se-cond pipe 6 communicates with a barrel 7 of a detonati-on unit (not shown). The pipe 5 is composed of two parts, 5a and 5b, which are interconnected by a sealin~ collar 8 o~ an elastic material. The sealing 8 may also be a bel-lows, a spherical coupling, etc. The part 5b of the pipe 5 is interposed between guide stops 9 and 10 mounted on the lid 4 and the bin 3, respectively. The part 5b is loaded by a spring 11 which allow~ a displacement of the end of the pipe 5. Extendin~ into the bin 3 is a nozzle 12 mounted at the e~d of a duct 13 communicating with the neutral gas pressure source. The nozzle 12 is arranged at the inlet of the second pipe 6 at an angle ~ to a geometrical axis 14. In the embodiment un~er review, the angle ~ is equal to 90. The neutral gas iet exiting fro~ the nozzle 12 purges the pipe 6 and also ser~es to .
~2~2~
displace th~ end of the pipe 5 i~ order to discontinue the suppl~ of pou~der to the pipe 6. The proportioning of powder is made more accurate through the use of a member 15 (FIG. ~) mounted on the end of the pipe 5. The member 15 is a flast strip with one end bent upward. The member 15 prevents stalling of the flow at the end of the pipe 5, directing tne flow upward and reducing its effect on the flow o~ powder from the pipe 5 into the bin 3.
One and of` a branch pipe 16 is connected to the nozzle 12. ~he opposite end of the branch pipe 16 is con-nected to the pipe 6.at some distance from its inlet.
The branch pipe 16 serves ~or additional purging of the .
:~ pipe 6.
~ he pipes 5 and 6 are arran~ed so that a gap ~ is allowed between their ends facing each other. The gap ~: allows a free displacement of the end of the pipe 5.
: The bin 3 is vented through an opening 17 provided in the lid 4.
. The device according to the invention for propor-tioning and feeding powder into a barrel o~ a detonation ~: :
unit operates as follows.
: During the entire period of operation, a neutral gas i~ conti~uously fed under pressure into the pipe 2.
he flow of neutral gas produces a powder-in-gas sus-pe~sio~ in the powder container 1. ~nder the pressure of ~ :
~222~37 neutral gas, the suspension is co~tinuously directed into the pipe 5 which at this ~ange of operation is coaxial with the pipe 6. rThrough the pipe 6, powder is ~ed into the barrel 7 of the detonation unit.
By an instruction from a c~ntrol console (~o~ S`QOWn) neutral gas is fed under pressur2 for a specified period of ti~e into t~e nozzle 12 and duct 13. On exiting from the nozzle 12, the gas acts on the member 15 and def-lects the pipe 5 so that the latter is no longer coaxial with the pipe 6 communicating with the barrel 7 of the detonation unit.
~ s a result, the feeding of powder into the barrel 7 discontinues, pre~enting the effects of detonation pro-ducts on the continuous flow of po~dèr through the pipe 5.
The ~eutral gas exiting from the nozzle 12 purges the pipe 6 communicating with the barrel 7 of the letonation unit. The purging is also done by neutral ~as supplied through the branch pipe 16.
The operation of the nozzle 12 is more effective if it is arran~ed at an angle ~ =90 to the geometrical axis 14 o~ the pipe 6. If ~ = 90, the purging of the pipe 6 prior to a detonation of the gas mi~ture in tne barrel is mora effective. At this point, a firing instruc-tion i~ sent from the control console, and the gas mix-ture detonates in the sprayi~g tip 7~
After the detonation, the supp}y of neutral gas ~ .
, 12Z213'7 through the nozzle 12 and duct 13 discontinues. Thespring 11 returns the pipe 5 to its original position so that it is again coaxial with the pipe 6. powder is again supplied through the pipe 6 into the barrel 7 o~
the deto~ation unit.
Thus a specified dose o~ powder is supplied to the barrel o~ the detonation unit prior to a detonation of the gas ~ixture.
The above seguence of events is then repeated, the first step being a feeding of neutral gas into the duct 13 and nozzle 12 as described above.
The device according to the i~vention provides for more accurate and reliable proportioning and feedi~g of powder into the barrel of a detonation unit. A pilot device in accordance with the invention was installed in :
a detonation coating unit. In the course o~ operation, the device ensured a highly accurate proportioning of powder ~ed into the barrel. The device also eliminated the effect of the back pressure of the explosive mixture on the powder flow. The result is a better quality and durability of spra~ coatings.
g : ~ :
and is more specifically concerned with a device for proportioning and feeding powder into the barrel of a detonation unit.
The device according to the invention is beast applicable to th~ ship-building, aircraft, instru~ent-m~king and other industries where flame spra~ing and detonation spragin~ are used.
~ here is known a device for feeding powder into the barrel of a detonation unit, which comprises a pow-der container communicating with a neutral gas pressure source and connected through a pipe to ~he barrel of the detonation unit. ~he powder is proportioned by an intermittent flow of neutral ~as.
The pipe is provided with an open branch verti-cally arranged in a covered bin and communicating with the atmo-sphere through a throttle (cf. USSR Inven-tor's Certi~icate No 1,007,747).
The device is disadvantageous in that some part o~ the detonation products is directed fro~ the barrel into the powder container. This affects the accuracy of proportioning.
t ~
There is known another device for proportioning and feeding powder into the barrel of a detonation :` ~
~ unit, comprising a powder conta~ner permanently co~-.`~
-- -1222~37 municating with a neutral gas pressure source, a bi~
accommodating two pipes which are coaxial during a powder feed cycle, whereof the first communicates with the powder container, while the second communicates with the barrel of the detonation unit. A neutral air duct is arranged parallel to the two pipes and serves to supply a neutral gas to the inlet o~ the pipe com-municating with the barrel of the detonation unit. The p~pe communicating with the powder container and the neutral gas duct are movable so that they can be al-ternately brought to the pipe communicating with the barrel, for which purpose they are kinematically coupl-ed to a mechanical drive (cf. A.I. Zverev, S.Yu. Shariv-ker, E.A. AstaKhov, "Detonatsionnoye nap~leniye pokry-tiy" /"Detonation Spraying of Coatings"/, Sudostroye~iye Publishers, ~e~ingrad, 1979, pp. 193-194). ~he latter device i8 regarded as the prototype of the one in ac-cordance with the invention.
The prototype device is disadvantageous in that it incorporates a number of movable parts, considering that it contains a mechanical drive kinematically coupl-ed to the pipe communic~ting with the powder container and the neutral ~as duct. Having a number of movable parts, the device is too complicated. The presence of movable parts affects the reliability of the device.
It is an object of the present inve~tion to 3impli~y the design of the device for proportioning and ~eeding ;~ :.::
.:~
lZ2Z~3'7 powder into the barrel of a detonation unit.
It is another object of tne inventio~ to e~hance the relia~ility of the device for proportioning and feeding powder into the barrel of a deto~ation unit.
It is still another object oY the in~ention to imDrove the quality of spray coatings.
~ he i~vention provides a device for proportioning and feeding powder into a barrel of a detonation unit, which comprises a powder container communicating with a neutral ~as pressure source, a bin accommodati~g two pipes which are coaxial during a powder ~eed cycle, whe-reof t~e first communicates with the powder container and is movable in relation to the second pipe communicat-ing with the barrel tof the detonation unit, and a duct for supplying a neutral gas to the inlet o~ the second pipe after a powder proportio~ing operation, which device is c h a r a c t e r i z e d in that the ~eutral gas duct end~ with a nozzle arranged at the iDlet of the second pipe at an angle to its geometrical axis and is provided with a branch whose first end is connected to the nozzle, while its second end is connected to the second pipe at some di~tance from ~ts inlet, the first plpe being arranged s~ that it is acted on by the neutral ~as jet exiting from the nozzle a~d is thus displaced in relatio~ to the Qecond pipe.
~ t i8 preferred that the pipe communicating with the powder container have at its end a member interacting with the neutral gas aet exiting from the nozzle.
This member may be of any geometrical shape. It may be an ellipse, a circle, a triangle, or a sguare.
It may also be of' an irre~ular shape. ~he member inc-reases the area over ~hich the jet of neutral gas acts on the pipe, and thus provides Ior an accurate and trouble-free displacement of the pipe.
It is also preferred that the nozzle be arranged at an angle equal to or greater than 90 to the geometrical axis of the second pipe.
This provides for highly effective purgi~g of the pipe communicating with the barrel.
The device ~ccording to the invention for proportion-ing and feedin~ po~der to a barrel o a detonation unit is simpler in design and more reliable than the proto-type device. It ensures more accurate proportioning of powdered materials than the prototype device.
Other objects and advantages of the present inven-tion w~ll become more apparent from a consideration of the ~ollowing detailed description of a preferred em-bodiment thereof, taken in ~onjunction with the accompan-ying drawings, wherein:
~ IG. 1 is an elevation view of a device in accordance with the invention ~or proportioning and feedi~g powder to a barrel of a detonation unit;
..
~22Z13'7 FIG. 2 is a Yiew taken in the direction of the arrow A i n FIG . 1 .
Referring to the accompanying drawings, the device according to the invention for proportioning and feed-ing powder into ~ barrel of a detonation unit comprises a powder container 1 ~FIG. 1) into which extends a pipe 2 connected to a neutral gas pressure source (not shown). Arran~ed next to the ~owder container 1 is a bin 3 covered with a lid 4 a~d accommodating two pipes, 5 and 6, wnich are coaxial during a powder ~eed cycle. The first pipe 5 com~unicates with the container 1. The se-cond pipe 6 communicates with a barrel 7 of a detonati-on unit (not shown). The pipe 5 is composed of two parts, 5a and 5b, which are interconnected by a sealin~ collar 8 o~ an elastic material. The sealing 8 may also be a bel-lows, a spherical coupling, etc. The part 5b of the pipe 5 is interposed between guide stops 9 and 10 mounted on the lid 4 and the bin 3, respectively. The part 5b is loaded by a spring 11 which allow~ a displacement of the end of the pipe 5. Extendin~ into the bin 3 is a nozzle 12 mounted at the e~d of a duct 13 communicating with the neutral gas pressure source. The nozzle 12 is arranged at the inlet of the second pipe 6 at an angle ~ to a geometrical axis 14. In the embodiment un~er review, the angle ~ is equal to 90. The neutral gas iet exiting fro~ the nozzle 12 purges the pipe 6 and also ser~es to .
~2~2~
displace th~ end of the pipe 5 i~ order to discontinue the suppl~ of pou~der to the pipe 6. The proportioning of powder is made more accurate through the use of a member 15 (FIG. ~) mounted on the end of the pipe 5. The member 15 is a flast strip with one end bent upward. The member 15 prevents stalling of the flow at the end of the pipe 5, directing tne flow upward and reducing its effect on the flow o~ powder from the pipe 5 into the bin 3.
One and of` a branch pipe 16 is connected to the nozzle 12. ~he opposite end of the branch pipe 16 is con-nected to the pipe 6.at some distance from its inlet.
The branch pipe 16 serves ~or additional purging of the .
:~ pipe 6.
~ he pipes 5 and 6 are arran~ed so that a gap ~ is allowed between their ends facing each other. The gap ~: allows a free displacement of the end of the pipe 5.
: The bin 3 is vented through an opening 17 provided in the lid 4.
. The device according to the invention for propor-tioning and feeding powder into a barrel o~ a detonation ~: :
unit operates as follows.
: During the entire period of operation, a neutral gas i~ conti~uously fed under pressure into the pipe 2.
he flow of neutral gas produces a powder-in-gas sus-pe~sio~ in the powder container 1. ~nder the pressure of ~ :
~222~37 neutral gas, the suspension is co~tinuously directed into the pipe 5 which at this ~ange of operation is coaxial with the pipe 6. rThrough the pipe 6, powder is ~ed into the barrel 7 of the detonation unit.
By an instruction from a c~ntrol console (~o~ S`QOWn) neutral gas is fed under pressur2 for a specified period of ti~e into t~e nozzle 12 and duct 13. On exiting from the nozzle 12, the gas acts on the member 15 and def-lects the pipe 5 so that the latter is no longer coaxial with the pipe 6 communicating with the barrel 7 of the detonation unit.
~ s a result, the feeding of powder into the barrel 7 discontinues, pre~enting the effects of detonation pro-ducts on the continuous flow of po~dèr through the pipe 5.
The ~eutral gas exiting from the nozzle 12 purges the pipe 6 communicating with the barrel 7 of the letonation unit. The purging is also done by neutral ~as supplied through the branch pipe 16.
The operation of the nozzle 12 is more effective if it is arran~ed at an angle ~ =90 to the geometrical axis 14 o~ the pipe 6. If ~ = 90, the purging of the pipe 6 prior to a detonation of the gas mi~ture in tne barrel is mora effective. At this point, a firing instruc-tion i~ sent from the control console, and the gas mix-ture detonates in the sprayi~g tip 7~
After the detonation, the supp}y of neutral gas ~ .
, 12Z213'7 through the nozzle 12 and duct 13 discontinues. Thespring 11 returns the pipe 5 to its original position so that it is again coaxial with the pipe 6. powder is again supplied through the pipe 6 into the barrel 7 o~
the deto~ation unit.
Thus a specified dose o~ powder is supplied to the barrel o~ the detonation unit prior to a detonation of the gas ~ixture.
The above seguence of events is then repeated, the first step being a feeding of neutral gas into the duct 13 and nozzle 12 as described above.
The device according to the i~vention provides for more accurate and reliable proportioning and feedi~g of powder into the barrel of a detonation unit. A pilot device in accordance with the invention was installed in :
a detonation coating unit. In the course o~ operation, the device ensured a highly accurate proportioning of powder ~ed into the barrel. The device also eliminated the effect of the back pressure of the explosive mixture on the powder flow. The result is a better quality and durability of spra~ coatings.
g : ~ :
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for proportioning and feeding powder into a barrel of a detonation unit, comprising: a powder con-tainer; a neutral gas pressure source permanently com-municating with said powder container; a bin; a first pipe whose first end is in said powder container and second end is in said bin; a second pipe whose first end communicates with said barrel of said detonation unit, while its second end is in said bin at some distance from the second end of said first pipe; said first and second pipes being coaxially arranged during a powder feed cycle; a duct for supplying a neutral gas after the end of powder proportioning; a nozzle arranged at the end of said neutral gas supply duct in said bin in proximity to said second end of said second pipe at an angle to its geometrical axis; a branch pipe whose first end is connected to said nozzle, while its second end is con-nected to said second pipe at some distance from its in-let; said first pipe being designed and arranged so that it is acted on by the neutral gas jet exiting from the nozzle and is thus displaced in relation to said second pipe after powder has been fed into said spraying tip of said detonation unit; a means for bringing said first pipe into a position coaxial with said second pipe.
2. A device as claimed in claim 1, wherein a member interacting with the neutral gas jet exiting from said nozzle is mounted on the end of said first pipe communica-ting with said powder container.
3. A device as claimed in claim 1, wherein said nozzle is arranged at an angle equal to or greater than 90° to the geometrical axis of said second pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000459966A CA1222137A (en) | 1984-07-30 | 1984-07-30 | Device for proportioning and feeding powder into barrel of detonation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000459966A CA1222137A (en) | 1984-07-30 | 1984-07-30 | Device for proportioning and feeding powder into barrel of detonation unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1222137A true CA1222137A (en) | 1987-05-26 |
Family
ID=4128420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000459966A Expired CA1222137A (en) | 1984-07-30 | 1984-07-30 | Device for proportioning and feeding powder into barrel of detonation unit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1222137A (en) |
-
1984
- 1984-07-30 CA CA000459966A patent/CA1222137A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |