CN104561879A - Device for exploding and spraying liquid fuels - Google Patents
Device for exploding and spraying liquid fuels Download PDFInfo
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- CN104561879A CN104561879A CN201410719741.5A CN201410719741A CN104561879A CN 104561879 A CN104561879 A CN 104561879A CN 201410719741 A CN201410719741 A CN 201410719741A CN 104561879 A CN104561879 A CN 104561879A
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- liquid fuel
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Abstract
The invention discloses a device for exploding and spraying liquid fuels. The device is characterized in that the fuels generating an explosive wave are liquid fuels such as gasoline and are convenient to carry and are safe; air is used as an oxidant and is inexpensive and is easy to obtain; air enters an explosion chamber in a tangential air inlet manner so that good blending and atomization effects of the fuels are achieved; the method for controlling air inlet and oil injection is realized by the change in the pressure difference between both sides of two one-way valves and is called as a self-adaption pulse explosive wave generation technology and the device is simplified; and under the action of high-temperature high-pressure environment formed in the explosion chamber, particle powder is rapidly molten, accelerated and sprayed on the surface of a workpiece with a relatively low temperature to form a coating. Due to the operating characteristics of pulse explosion, the spraying process is long in operation time and high in continuity, the varieties of the particle powder material are multiple, the device can be used for the surface treatment of an article made of multiple materials, the bonding strength between the particle powder and the workpiece is high, the surface of the coating of the workpiece is uniform and dense and the porosity is low.
Description
Technical field
The invention belongs to field of surface treatment, relate to the liquid fuel detonation flame spraying method and apparatus of a class particle powder material.
Background technology
Many high temperature in industrial and life, high corrosion, the severe environment needs such as high wearing and tearing cover one deck protecting materials film at workpiece surface.Explosive spray coating is that a kind of energy of blast that utilizes needs to do on surface-treated workpiece by being ejected into after the solid powder particle heating and melting of high-quality protecting materials.Have three kinds of methods at present: electrical explosion, high pressure gas impact and pulse explosion.The relative first two of pulse explosion method has longevity of service simultaneously, continuity is high, the Material selec-tion kind of particle powder is many, the temperature that object needs is low, and can be used for the surface treatment of the object of various material, the bonding strength of particle powder and workpiece is high, workpiece coatingsurface even compact, the advantages such as void content is low, easy to carry, cheap.In recent years, comprise a lot of country of China all studying it.
At present, the technical study overwhelming majority of international and domestic paired pulses detonation flame spraying uses gaseous fuel acetylene and oxygen, and need to use magnetic valve and rotary valve to carry out work, reason is that gaseous fuel and oxygen are easy to even blend, and gaseous fuel and oxygen mix are easy to detonate in addition.And liquid fuel energy density is high, and store and easy to carry, price is relatively cheap, easy acquisition, storage security, operating pressure is lower, have larger advantage relative to gaseous fuel in actual applications, air also more easily obtains relative to oxygen simultaneously, safer in storage, even can instant compression produce, finally, exploded by a kind of self-adaptation of new exploration, magnetic valve or rotary valve can be removed, only need two check valves just can to work use, enormously simplify the complexity of equipment.So far, yet there are no and use liquid fuel and air to combine with adaptive technique to produce the report of the detonation flame spraying technique of pulse explosion ripple and the detailed protocol of device.
Summary of the invention
Technical problem to be solved by this invention proposes a kind of use material extensively, and Application Areas is wide, and working efficiency is high, the device of the detonation flame spraying of the measured liquid fuel of matter and air.The wave of explosion that this device utilizes liquid fuel and air combustion to produce carrys out heating and melting powder particle and is ejected into need surface-treated workpiece surface.
Technical scheme
A kind of device of liquid fuel detonation flame spraying: comprise explosion chamber (1), cooling chamber (2), powder reserve tank (3), valve (4), spark plug igniter (5), air inlet (6), air subtube (71), air main road (72), oil nozzle (8), the first check valve (91), pressure-oil tank (10), second check valve (92), air compressor (11), entrance of cooling water (12), powder spout (13), cooling water outlet (14), workpiece (15).
Explosion chamber (1) is an open circles endless tube, and internal diameter variation range is 10-100mm, length variations scope 200-2000mm, and an end head is closed, and the other end afterbody is opening.The closed head position of center line of explosion chamber (1) is provided with a nozzle burner (8), the outlet of nozzle burner (8) is in explosion chamber (1), and the import of nozzle burner (8) in explosion chamber (1) outward.Be full of the liquid fuel of pressurization in pressure-oil tank (10), as gasoline, kerosene or other can quick-fried liquid fuel etc.The import of nozzle burner (8) is connected with pressure-oil tank (10).Between the import of nozzle burner (8) and pressure-oil tank (10), the first check valve (91) is installed.First check valve (91) is a kind of uniflux valve, installation direction requires when the pressure of pressure-oil tank (10) side is greater than nozzle burner (8) wall pressure, liquid fuel can by pressure-oil tank (10) side inflow to nozzle burner (8) side, and not allow nozzle burner (8) effluent to pressure-oil tank (10) side in any situation.At the distance range of nozzle burner (8) downstream 0-50mm, explosion chamber (1) has the air inlet (6) of some amount, the air subtube (71) be connected with air inlet (6) tangentially enters into explosion chamber.The medullary ray of air subtube (71) is not crossing with the medullary ray of explosion chamber (1), the air entered is tangential rotating state, air inlet (6) is not limited in four with the number of air subtube (71), it can circumferentially be evenly arranged 1-8 root in explosion chamber (1), and its cutting angle of entering can in the range of 0-90 degree, sense of rotation has left-handed or dextrorotation two kinds selection.All air subtubes (71) are connected with air main road (72) with parallel way.The air that air compressor (11) compresses directly takes from atmospheric environment, with the oxygenant being made in explosive combustion in explosion chamber (1).Air main road (72) is connected with air compressor (11), is provided with the second check valve (92) between air main road (72) and air compressor (11).Second check valve (92) is also a kind of uniflux valve, installation direction requires when the pressure of air compressor (11) side is greater than air main road (72) wall pressure, air can by air compressor (11) side inflow to air main road (7) side, and not allow air main road (7) effluent to air compressor (11) side in any situation.In the position explosion chamber (1) of spark plug igniter (5), in the 0-50mm position, downstream of air inlet.In the downstream position of spark plug igniter (5), explosion chamber is provided with a powder spout (13), powder spout (13) can discharge powder particle coating at reasonable time under the effect of valve (4), and other times then stop release powder particle coating.Cooling chamber (2) is a cavity of isolating with explosion chamber (1), and centre is filled with water coolant, only has two openings, entrance of cooling water (12) and cooling water outlet (14).
Powder reserve tank (3) and the middle powdered material kind used of powder spout (13) mainly comprise 5 kinds: metal species: (Al, Zn, Cu, Fe, Ti, V, Co, Ni); Oxide compound: (Al
2o
3, Cr
2o
3, MgAl
2o
4, TiO
2) carbide: (WC, Cr
3c
2, TiC, SiC, 91WC-9Co, 85Cr
3c
2-15 [Ni-Cr]); Alloy: (20Cr-80Ni, 30Al-0.2Fe-69.8NI, 53Nb-47Ti); Other: (TiB2, ZrB
2).
During device work, unloading phase, air inlet (6) air inlet, nozzle burner (8) oil atomizing, spark plug igniter (5) is lighted a fire, powder spout (13) release powder particle coating, gas-oil mixture burns, be High Temperature High Pressure supersonic speed shock wave to Way out communication development, the first and second closed check valves, stop air inlet.Powder melts acceleration in the supersonic speed shock wave of High Temperature High Pressure, and export away from explosion chamber (1) and beat on workpiece (15) surface, cooled and solidified completes spraying.Shock wave go out from explosion chamber (1) after pressure reduce, so air intlet (6) can air inlet again, combustion exhaust in explosion chamber is blown down clean, and oil spout again, enter next ignition process or circulation, this mode is called self-adaptation air inlet and exhaust, controls air inlet and exhaust, also referred to as valveless air inlet and exhaust without magnetic valve or rotary valve.
Spark plug igniter (5) work spark rate is consistent with the frequency of release sprayed particle, and spark rate will mate mutually with the frequency of adaptive air inlet and exhaust, and just current this stabilized frequency of research conditions can between 2-200 hertz.
Beneficial effect
Compared with prior art, after advantage of the present invention is employing apparatus of the present invention, air compressor is draw air from air directly, by pipeline, air pressure is delivered to the air inlet of explosion chamber, eddy flow is formed at the head of explosion chamber, in liquid fuel fuel tank, pressurized fuel forms combustible oil gas mixture by nozzle burner after explosion chamber head and rotary air blending are atomized, lighter for ignition works, combustion gas forms High Temperature High Pressure supersonic speed shock wave, air door and fuel check valve withstand by the combustion gas of high pressure, stop supply air, workpiece surface is ejected into from explosion chamber outlet after powder coating fusing being accelerated.Pressure reduces afterwards, air inlet and fuel feeding again, and the waste gas in explosion chamber blows down by the air feed newly entered, and completes gas replenishment process, automatically enters next working cycle.Because the air using safe liquid fuel easy to carry and cheapness easily to get explodes, and due to air inlet and exhaust be all the adaptive technique not adopting magnetic valve and rotary valve, enormously simplify the complexity of device.Simultaneously, it is high that the effect of powder spraying has continuity, the selectivity of particle powder is high, and the temperature that object needs is low, can be used for the object of more material, the bonding strength of particle powder and workpiece is high, workpiece coatingsurface even compact, void content is low, easy to carry, cheap, the advantage such as safe and reliable.
Accompanying drawing explanation
Fig. 1: the present invention partly cuts open figure
Fig. 2: figure partly cuts open in air inlet place
(1) explosion chamber in figure, (2) cooling chamber, (3) powder reserve tank, (4) valve, (5) spark plug igniter, (6) air inlet, (71) air subtube, (72) air main road, (8) oil nozzle, (91) first check valves, (10) pressure-oil tank, (92) second check valves, (11) air compressor, (12) entrance of cooling water, (13) powder spout, (14) cooling water outlet, (15) workpiece.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
As shown in Figure 1, the invention provides a kind of device of liquid fuel detonation flame spraying, comprise explosion chamber (1), be enclosed within the cooling chamber (2) outside explosion chamber, cooling chamber has an entrance of cooling water (12) and a cooling water outlet (14), the nozzle burner (8) that pressure-oil tank is installed with explosion chamber head by the first check valve (91) is connected, air compressor (11) is connected with air main road (72) by the second check valve (92), air main road (72) is connected with the air intlet gas (6) of the respective numbers in explosion chamber after being divided into many air subtubes (71), spark plug igniter (5) is arranged on the downstream of air inlet (6), powder reserve tank has powder coating in (3), the valve (4) be attached thereto can be controlled powder and be flowed out in explosion chamber (1) by powder spout (13).
Embodiment 1 as shown in Figure 1, a kind of liquid fuel detonation flame spraying device, during device work, unloading phase, air pressure in air compressor (11) is greater than pressure in air subtube (71) and explosion chamber (1), in pressure-oil tank (10), oil pressure is greater than the pressure in explosion chamber (1), so the first check valve (91) and the second check valve (92) are in open mode, the head of explosion chamber (1) is flowed into from air inlet (6) air out, air draught in the turning effort of air inlet (6) so in rotating state, nozzle burner (8) is in the liquid fuel of explosion chamber (1) head ejection primary atomization, fuel oil continues blending and is atomized and forms flammable gas-oil mixture under the effect of swirling eddy with air, the igniting of spark plug igniter (5) work afterwards, powder spout (13) release powder particle coating, combustible oil gas mixture is lighted, gas-oil mixture Thorough combustion, High Temperature High Pressure supersonic speed shock wave is developed into Way out fast propagation, now because pressure in explosion chamber raises, the first check valve (91) and the second check valve (92) is caused to be closed, stop air inlet and oil spout.Powder melts acceleration in the supersonic speed shock wave of High Temperature High Pressure, and finally from explosion chamber (1) outlet ejection, beat on lower workpiece (15) surface of temperature, cooled and solidified forms coating.Shock wave causes pressure to reduce after going out from explosion chamber (1), so air inlet (6) can air inlet again, is blown down by the combustion exhaust in explosion chamber clean, and oil spout again, enter next ignition process or circulation.This mode is called self-adaptation air inlet and exhaust in blast research, does not need magnetic valve or rotary valve to control air inlet and exhaust, also referred to as valveless air inlet and exhaust.
Claims (8)
1. the device of a liquid fuel detonation flame spraying, it is characterized in that: comprise explosion chamber (1), cooling chamber (2), powder reserve tank (3), valve (4), spark plug igniter (5), air inlet (6), air subtube (71), air main road (72), oil nozzle (8), first check valve (91), pressure-oil tank (10), second check valve (92), air compressor (11), entrance of cooling water (12), powder spout (13), cooling water outlet (14), workpiece (15).
2. the device of a kind of liquid fuel detonation flame spraying according to claim 1, it is characterized in that: explosion chamber (1) is an open circles endless tube, internal diameter variation range is 10-100mm, length variations scope is 200-2000mm, one end head is closed, and the other end afterbody is opening.The closed head position of center line of explosion chamber (1) is provided with a nozzle burner (8), the outlet of nozzle burner (8) is in explosion chamber (1), and the import of nozzle burner (8) in explosion chamber (1) outward.The import of nozzle burner (8) is connected with pressure-oil tank (10).Between the import of nozzle burner (8) and pressure-oil tank (10), the first check valve (91) is installed.At the distance range of nozzle burner (8) downstream 0-50mm, explosion chamber (1) has the air inlet (6) of some amount, the air subtube (71) be connected with air inlet (6) tangentially enters into explosion chamber.All air subtubes (71) are connected with air main road (72) with parallel way.Air main road (72) is connected with air compressor (11), is provided with the second check valve (92) between air main road (72) and air compressor (11).In the position explosion chamber (1) of spark plug igniter (5), in the 0-50mm position, downstream of air inlet.In the downstream position of spark plug igniter (5), explosion chamber is provided with a powder spout (13), powder spout (13) can discharge powder particle coating at reasonable time under the effect of valve (4), and other times then stop release powder particle coating.Cooling chamber (2) is a cavity of isolating with explosion chamber (1), and centre is filled with water coolant, only has two openings, entrance of cooling water (12) and cooling water outlet (14).
3. the device of a kind of liquid fuel detonation flame spraying according to claim 1 and 2, is characterized in that: the liquid fuel being full of pressurization in pressure-oil tank (10), as gasoline, kerosene or other can quick-fried liquid fuel etc.The air that air compressor (11) compresses directly takes from atmospheric environment, with the oxygenant being made in explosive combustion in explosion chamber (1).
4. the device of a kind of liquid fuel detonation flame spraying according to claim 1,2 or 3, it is characterized in that: the medullary ray of air subtube (71) is not crossing with the medullary ray of explosion chamber (1), the air entered is tangential rotating state, air inlet (6) is not limited in four with the number of air subtube (71), it can circumferentially be evenly arranged 1-8 root in explosion chamber (1), and its cutting angle of entering can in the range of 0-90 degree, sense of rotation has left-handed or dextrorotation two kinds selection.
5. the device of a kind of liquid fuel detonation flame spraying according to claim 1,2,3 or 4, it is characterized in that: the first check valve (91) is a kind of uniflux valve, installation direction requires when the pressure of pressure-oil tank (10) side is greater than nozzle burner (8) wall pressure, liquid fuel can by pressure-oil tank (10) side inflow to nozzle burner (8) side, and not allow nozzle burner (8) effluent to pressure-oil tank (10) side in any situation.Second check valve (92) is also a kind of uniflux valve, installation direction requires when the pressure of air compressor (11) side is greater than air main road (72) wall pressure, air can by air compressor (11) side inflow to air main road (7) side, and not allow air main road (7) effluent to air compressor (11) side in any situation.
6. the device of a kind of liquid fuel detonation flame spraying according to claim 1,2,3,4 or 5, it is characterized in that: powder reserve tank (3) and the middle powdered material kind used of powder spout (13) mainly comprise 5 kinds: metal species: (Al, Zn, Cu, Fe, Ti, V, Co, Ni); Oxide compound: (Al2O3, Cr2O3, MgAl2O4, TiO2) carbide: (WC, Cr3C2, TiC, SiC, 91WC-9Co, 85Cr3C2-15 [Ni-Cr]); Alloy: (20Cr-80Ni, 30Al-0.2Fe-69.8NI, 53Nb-47Ti); Other: (TiB2, ZrB2).
7. the device of a kind of liquid fuel detonation flame spraying according to claim 1,2,3,4,5 or 6, it is characterized in that: during device work, unloading phase, air inlet (6) air inlet, nozzle burner (8) oil atomizing, spark plug igniter (5) is lighted a fire, powder spout (13) release powder particle coating, gas-oil mixture burns, be High Temperature High Pressure supersonic speed shock wave to Way out communication development, first and second closed check valves, stop air inlet.Powder melts acceleration in the supersonic speed shock wave of High Temperature High Pressure, and export away from explosion chamber (1) and beat on workpiece (15) surface, cooled and solidified completes spraying.Shock wave go out from explosion chamber (1) after pressure reduce, so air intlet (6) can air inlet again, combustion exhaust in explosion chamber is blown down clean, and oil spout again, enter next ignition process or circulation, this mode is called self-adaptation air inlet and exhaust, controls air inlet and exhaust, also referred to as valveless air inlet and exhaust without magnetic valve or rotary valve.
8. the device of a kind of liquid fuel detonation flame spraying according to claim 1,2,3,4,5,6 or 7 is characterized in that: spark plug igniter (5) work spark rate is consistent with the frequency of release sprayed particle, spark rate will mate mutually with the frequency of adaptive air inlet and exhaust, and just current this stabilized frequency of research conditions can between 2-200 hertz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410719741.5A CN104561879A (en) | 2014-11-25 | 2014-11-25 | Device for exploding and spraying liquid fuels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410719741.5A CN104561879A (en) | 2014-11-25 | 2014-11-25 | Device for exploding and spraying liquid fuels |
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| Publication Number | Publication Date |
|---|---|
| CN104561879A true CN104561879A (en) | 2015-04-29 |
Family
ID=53078940
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410719741.5A Pending CN104561879A (en) | 2014-11-25 | 2014-11-25 | Device for exploding and spraying liquid fuels |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535446A (en) * | 2018-04-19 | 2018-09-14 | 河南工程学院 | Pipeline gas explosion causes the experimental provision and method that deposit coal dust subsequent explosion |
| CN113088861A (en) * | 2021-04-07 | 2021-07-09 | 西北工业大学 | Small-size explosion spraying device of efficient |
| CN114525464A (en) * | 2022-01-22 | 2022-05-24 | 西北工业大学 | Spraying device based on rotatory knockings |
| CN115233140A (en) * | 2022-07-29 | 2022-10-25 | 西安热工研究院有限公司 | Explosion spraying device suitable for hydrogen diffusion combustion |
| CN117948610A (en) * | 2024-03-21 | 2024-04-30 | 大同知了科技有限公司 | Shock wave device, shock wave gasification burner and combustion method |
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| US2774625A (en) * | 1954-10-21 | 1956-12-18 | Union Carbide & Carbon Corp | Apparatus utilizing detonation waves for spraying powders |
| CN1078272A (en) * | 1993-05-22 | 1993-11-10 | 北京钛得新工艺材料有限公司 | Detonation flame spraying method and equipment thereof |
| CN2560436Y (en) * | 2002-03-21 | 2003-07-16 | 中国人民解放军第二炮兵工程学院技术开发中心 | Low-temperature ultrasonic flame spraying equipment |
| CN101297057A (en) * | 2005-11-04 | 2008-10-29 | 乔治·杰伊·利希特布劳 | Flame spraying process and apparatus |
-
2014
- 2014-11-25 CN CN201410719741.5A patent/CN104561879A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2774625A (en) * | 1954-10-21 | 1956-12-18 | Union Carbide & Carbon Corp | Apparatus utilizing detonation waves for spraying powders |
| CN1078272A (en) * | 1993-05-22 | 1993-11-10 | 北京钛得新工艺材料有限公司 | Detonation flame spraying method and equipment thereof |
| CN2560436Y (en) * | 2002-03-21 | 2003-07-16 | 中国人民解放军第二炮兵工程学院技术开发中心 | Low-temperature ultrasonic flame spraying equipment |
| CN101297057A (en) * | 2005-11-04 | 2008-10-29 | 乔治·杰伊·利希特布劳 | Flame spraying process and apparatus |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535446A (en) * | 2018-04-19 | 2018-09-14 | 河南工程学院 | Pipeline gas explosion causes the experimental provision and method that deposit coal dust subsequent explosion |
| CN108535446B (en) * | 2018-04-19 | 2023-08-22 | 河南工程学院 | Experimental device and method for secondary explosion of deposited coal dust caused by gas explosion of pipeline |
| CN113088861A (en) * | 2021-04-07 | 2021-07-09 | 西北工业大学 | Small-size explosion spraying device of efficient |
| CN114525464A (en) * | 2022-01-22 | 2022-05-24 | 西北工业大学 | Spraying device based on rotatory knockings |
| CN114525464B (en) * | 2022-01-22 | 2024-01-26 | 西北工业大学 | Spraying device based on rotatory knocking |
| CN115233140A (en) * | 2022-07-29 | 2022-10-25 | 西安热工研究院有限公司 | Explosion spraying device suitable for hydrogen diffusion combustion |
| CN115233140B (en) * | 2022-07-29 | 2023-11-03 | 西安热工研究院有限公司 | Explosion spraying device suitable for hydrogen diffusion combustion |
| CN117948610A (en) * | 2024-03-21 | 2024-04-30 | 大同知了科技有限公司 | Shock wave device, shock wave gasification burner and combustion method |
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