CN101380622A - Polymers material cold spraying system and preparation method of coatings - Google Patents
Polymers material cold spraying system and preparation method of coatings Download PDFInfo
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- CN101380622A CN101380622A CNA2008102317769A CN200810231776A CN101380622A CN 101380622 A CN101380622 A CN 101380622A CN A2008102317769 A CNA2008102317769 A CN A2008102317769A CN 200810231776 A CN200810231776 A CN 200810231776A CN 101380622 A CN101380622 A CN 101380622A
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Abstract
The invention discloses a polymer material cold spraying system and a method for preparing the coating. The system comprises a powder feeding pipeline, a preheating pipeline and a spraying solidifying pipeline which are arranged in parallel, wherein, the powder feeding pipeline is provided with a gas flow controller A, a powder hopper and an extension type spraying gun which is particularly manufactured for the system; the preheating pipeline is provided with a gas flow controller B and an air heater A; the spraying pipeline is provided with an air heater B; and an air flow controller C and the extension type spraying gun are respectively connected with the air heater B. With the system, polymer material powder can be plasticized in thermal current, and can be sprayed on the surface of a pretreated workpiece by the function of the thermal current, thereby forming a polymer material coating after cooling. The system can be used in corrosion prevention of a chemical vessel and corrosion prevention job site of oil and gas pipeline, thereby reducing heating temperature of spraying, avoiding oxidation, burning loss, degradation and other phenomena of polymer material powder particles, at the same time, reducing the temperature for preheating the workpiece and avoiding the change of matrix organization structure.
Description
Technical field
The invention belongs to field of polymer material preparing technology, relate to a kind of preparation system of macromolecular material, be specifically related to a kind of polymers material cold spraying system, the invention still further relates to the method for utilizing this systems produce coating.
Background technology
Macromolecular material is widely used industrial as a kind of corrosion-inhibiting coating effectively.Particularly in recent years, macromolecular materials such as high density polyethylene (HDPE) are used for the anticorrosion of oil pipeline, make tubing avoid the corrosion of pipeline inner fluid and the corrosion of the outer soil of pipeline.
At present, macromolecular material is coated on the method for the matrix surface that need take anti-corrosion measure, flame spraying and electrostatic spray are arranged.Flame spraying is had relatively high expectations to the preheat temperature of matrix, influences the matrix structure easily, sprays scaling loss and degraded that flame easily causes macromolecular material such as high density polyethylene (HDPE), epoxy powder etc. simultaneously.The electrostatic coating system that electrostatic spray adopts can't be used for the scene of pressure vessels for the chemical industry and oil and gas pipeline anticorrosive construction, parts such as joint, threeway anticorrosion that makes the on-the-spot welding of oil and gas pipeline, can only adopt spread coating at its surface preparation corrosion-inhibiting coating, the macromolecular material of brushing is generally epoxy coating, contain organic solvent in the epoxy coating, after the organic solvent volatilization, cause corrosion-inhibiting coating micropore to occur, form the hidden danger of coating corrosion, and the coating of brushing is thinner, need through repeatedly brushing, coating layer thickness just can reach 1mm, long construction period; Simultaneously, coating layer thickness, quality heterogeneity that the method for the corrosion-inhibiting coating of oil transportation gas transmission trunk line spraying and pipe joint place brushing obtains make the places such as joint, valve and threeway of pipeline become the weak link of corrosion protection.
Summary of the invention
The purpose of this invention is to provide a kind of polymers material cold spraying system, the scene that can be used for the anticorrosion of pressure vessels for the chemical industry and oil and gas pipeline anticorrosive construction, at a lower temperature macromolecular material is sprayed at pipe surface, formation has the coating of anti-corrosion function, avoid oxidation, scaling loss and the degraded of macromolecular material, do not need that matrix is carried out high temperature preheating and handle, avoid the variation of matrix structure.
Another object of the present invention provides a kind of method that adopts above-mentioned polymers material cold spraying system to prepare coating.
The technical solution adopted in the present invention is, a kind of polymers material cold spraying system, comprise the powder feeding pipeline that is arranged in parallel, pipeline is solidified in preheating pipeline and spraying, these three pipelines communicate with the gas inlet pipe road respectively, described powder feeding pipeline is disposed with gas flow controller A by gas flow direction, powder bucket and bushing type spray gun, the preheating pipeline is disposed with gas flow controller B and air heater A by gas flow direction, air heater A is connected with voltage controller A, the spraying pipeline is provided with air heater B, air heater B is connected with voltage controller B, the spraying pipeline is divided into the branch road of two parallel connections after by air heater B, article one, branch road is by gas flow controller D, it is terminal affixed with the bushing type spray gun, and another branch road is provided with gas flow controller C.
Another technical scheme of the present invention is, utilizes above-mentioned polymers material cold spraying system to prepare the method for coating, carries out according to the following steps:
Step 1: handle on the surface to the workpiece of need spray-on coating
To the surface of the workpiece of need spray-on coating, carry out oil removing, rust cleaning and sandblast roughening treatment according to a conventional method, then, clean with acetone;
Step 2: the surface of the work spraying solidified coating after processing
Adopt a polymers material cold spraying system, this system comprises the powder feeding pipeline that is arranged in parallel, pipeline is solidified in preheating pipeline and spraying, these three pipelines communicate with the gas inlet pipe road respectively, described powder feeding pipeline is disposed with gas flow controller A by gas flow direction, powder bucket and bushing type spray gun, the bushing type spray gun is fixed in the end of powder feeding pipeline, the preheating pipeline is disposed with gas flow controller B and air heater A by gas flow direction, air heater A is connected with voltage controller A, the spraying pipeline is provided with air heater B, air heater B is connected with voltage controller B, the spraying pipeline is divided into the branch road of two parallel connections after by air heater B, article one, branch road is by gas flow controller D, it is terminal affixed with the bushing type spray gun, and another branch road is provided with gas flow controller C
Open the air heater in the preheating pipeline, controlling its voltage is 220V, air by this air heater is heated, the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after step 1 is handled is that 0.8MPa～1.0MPa, gas flow are 1.8m
3/ h～2.0m
3/ h, gas temperature are 200 ℃～240 ℃, make that the temperature of workpiece is 80 ℃～120 ℃ after the preheating;
Open the powder feeding pipeline, regulate the gas flow controller that is provided with in the powder feeding pipeline, the control gas flow is 2.3m
3/ h～2.5m
3/ h, this gas will be sent in the powder feeding pipe in the bushing type spray gun that is fixed in the powder feeding pipe way outlet by the macromolecule material powder that powder bucket bottom enters pipeline,
Open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 260V～280V, air by this gas heater is heated, the temperature of the air after the heating is 160 ℃～200 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.3m
3/ h～2.5m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtain incomplete levelling cured coating, the adopting process parameter is in the spraying process: spray distance 50mm～80mm, 85 °～95 ° of spray angles, spraying rate 8cm/s～10cm/s
Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.0m
3/ h～1.2m
3/ h sprays to coating, to the coating heating, makes its levelling crosslinking curing, obtains the coating that thickness is 0.6mm～1.0mm.
The beneficial effect of system of the present invention is:
1. adopt thermal current as thermal source, pass through regulation voltage, control gas flow, temperature and speed, the spraying temperature when reducing the preheat temperature of matrix and spraying is avoided too high and the degraded that the changes in microstructure that causes and powder are heated and cause of substrate preheating temperature.
2. equipment volume is little, but site operation.
3. coating performance is better, and it is suitable with electrostatic spraying with high base strength, and the coating of 0.3mm detects pore-free with electric spark leak detector.
Description of drawings
Fig. 1 is the structural representation of system of the present invention;
Fig. 2 is the structural representation of system of the present invention middle sleeve formula spray gun; Wherein, a is a front view, and b is a vertical view, the A-A cutaway view of c front view.
Among the figure, 1. gas flow controller A, 2. gas flow controller B, 3. air heater A, 4. powder bucket, 5. gas flow controller C, 6. bushing type spray gun, 7. gas flow controller D, 8. air heater B, 9. voltage controller A, 10. voltage controller B, 11. workpiece.
Wherein, 6-1. spout cover, 6-2. support, 6-3. gun body, 6-4. sleeve pipe, 6-5. connection cover, 6-6. powder feeding pipe, 6-7. baffle plate, 6-8. air inlet.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The structure of system of the present invention, as shown in Figure 1.Comprise the powder feeding pipeline, preheating pipeline and the spraying curing pipeline that are arranged in parallel, these three pipelines communicate with the gas inlet pipe road respectively.Be disposed with gas flow controller A1, powder bucket 4 and bushing type spray gun 6 by gas flow direction on the powder feeding pipeline, bushing type spray gun 6 is fixed in the end of powder feeding pipeline, and its spout is towards workpiece 11; Be disposed with gas flow controller B2 and air heater A3 by gas flow direction on the preheating pipeline, air heater A3 is connected with voltage controller A9, and the outlet of preheating pipeline is towards workpiece 11; The spraying pipeline is provided with air heater B8, air heater B8 is connected with voltage controller B10, the spraying pipeline is divided into the branch road of two parallel connections after by air heater B8, wherein a branch road is by behind the gas flow controller D7, it is terminal affixed with bushing type spray gun 6, another branch road is provided with gas flow controller C5, and the outlet of this branch road is towards workpiece 11.
The structure of system of the present invention middle sleeve formula spray gun is shown in Fig. 2 a, 2b, 2c.The gun body 6-3 that comprises ring-type, the sidewall of gun body 6-3 is provided with air inlet 6-8, the end of gun body 6-3 is fixed with spout cover 6-1, the other end of gun body 6-3 is connected with connection cover 6-5, connection cover 6-5 is fixedlyed connected with the sleeve pipe 6-4 of annular, the end of sleeve pipe 6-4 stretches in the gun body 6-3, and is fixed in the inwall of gun body 6-3 by three uniform support 6-2, and the other end of sleeve pipe 6-4 passes connection cover 6-5 and stretches out outside the bushing type spray gun; Be provided with powder feeding pipe 6-6 in the sleeve pipe 6-4 with the coaxial hollow of sleeve pipe 6-4, powder feeding pipe 6-6 is fixedlyed connected with the inwall of sleeve pipe 6-4 by two baffle plate 6-7 that are symmetrically distributed, and powder feeding pipe 6-6 and two baffle plate 6-7 are divided into not connected two parts with the endoporus of sleeve pipe 6-4.
In the system of the present invention,
The preheating pipeline is regulated the power of air heater A3 by voltage controller A9, and regulate the flow of preheating gas by gas flow controller B2, the temperature of control preheating gas is 60 ℃～300 ℃, to reach the purpose of effectively pre-hot basal body, simultaneously, pre-thermal current does not form the spraying air-flow and disturbs.
The powder feeding pipeline is by the speed of adjustments of gas flow controller A1 control powder bucket 4 powder delivery and the spraying rate of system.
Spray and solidify the input voltage of pipeline, control the temperature of gas, and pass through the flow of gas flow-control gas, realize controlled heating macromolecule material powder by voltage controller B10 adjusting air heater B8.By the gas flow of gas flow controller D7 control bushing type spray gun 6, the heat time heating time and the flying speed of regulating macromolecule material powder are sprayed at matrix surface with the macromolecule material powder of fusion; Adjustments of gas flow controller C5 can control the solid gas flow, and the fusion macromolecular material that is sprayed at matrix surface is solidified, and this gas stream is to being in the coating formation impact of solidifying in the levelling process, in order to avoid influence the coating surface quality.
Gap between bushing type spray gun 6 middle sleeve 6-4 inwalls and the powder feeding pipe 6-6 is connected with cold water, avoid macromolecule material powder to be heated attaching to the inwall of powder feeding pipe 6-6, cause powder feeding pipe 6-6 to stop up, powder feeding pipe 6-6 and baffle plate 6-7 are divided into not connected two parts with sleeve pipe 6-4 endoporus, form the intake antrum and the water chamber of cold water, constitute a cooling water circulating line, spout cover 6-1 plays the contraction air-flow, promotes the effect of spraying air velocity.
System of the present invention utilizes controlled heated air as the spraying thermal source, and by the bushing type spray gun macromolecular material is sprayed at matrix surface, forms coating.Adopt the method for this systems produce coating, specifically carry out according to the following steps:
Step 1: handle on the surface to the workpiece of need spray-on coating
To the surface of the work of need spray-on coating, carry out oil removing, rust cleaning and sandblast roughening treatment according to a conventional method, then, clean with acetone;
The sandblast roughening treatment, the angle of sand grains injection direction and substrate surface, i.e. sandblast angle is 60 °～80 °, sand grains embeds surface of the work when preventing 90 ° of direction sandblasts.
Step 2: the surface of the work spraying solidified coating after processing
Adopt a polymers material cold spraying system, open the air heater in the preheating pipeline, controlling its voltage is 220V, air by this air heater is heated, the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after step 1 is handled is that 0.8MPa～1.0MPa, gas flow are 1.8m
3/ h～2.0m
3/ h, gas temperature are 200 ℃～240 ℃, make that the temperature of workpiece is 80 ℃～120 ℃ after the preheating;
Open the powder feeding pipeline, regulate the gas flow controller that is provided with in the powder feeding pipeline, the control gas flow is 2.3m
3/ h～2.5m
3/ h, this gas is sent into the macromolecule material powder that powder bucket bottom enters pipeline in the powder feeding pipe that is connected to the bushing type spray gun.
Open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 260V～280V, air by this gas heater is heated, the temperature of the air after the heating is 160 ℃～200 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.3m
3/ h～2.5m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtain incomplete levelling cured coating, the adopting process parameter is in the spraying process: spray distance 50mm～80mm, 85 °～95 ° of spray angles, spraying rate 8cm/s～10cm/s
Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.0m
3/ h～1.2m
3/ h sprays to coating, to the coating heating, makes its levelling crosslinking curing, obtains the coating that thickness is 0.6mm～1.0mm.
Embodiment 1:
Get anticorrosion special epoxy resin powder of oil pipeline and transition zone powder, add in the powder bucket of polymers material cold spraying system.Get the X70 pipe line steel, according to a conventional method oil removing, rust cleaning and sandblast roughening treatment are carried out in its surface, then, clean with acetone; The sandblast angle of sandblast roughening treatment is 60 °～80 °.Open the air heater in the preheating pipeline, controlling its voltage is 220V, the air by this air heater is heated, and the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after the processing is that 0.8MPa, gas flow are 1.8m
3/ h, gas temperature are 200 ℃, make that the temperature of workpiece is 80 ℃ after the preheating; Open the powder feeding pipeline in the polymers material cold spraying system, regulate the gas flow controller in the powder feeding pipeline, the control gas flow is 2.3m
3/ h, this gas will be sent in the powder feeding pipe in the bushing type spray gun that is fixed in the powder feeding pipe way outlet by the macromolecule material powder that powder bucket bottom enters pipeline, open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 260V, air by this gas heater is heated, the temperature of the air after the heating is 160 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.3m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, spray distance is that 50mm, spray angle are that 85 °, spraying rate are 8cm/s, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtains levelling cured coating fully; Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.0m
3/ h sprays to uncured coating, to its heating, makes it the levelling crosslinking curing, obtains the coating that thickness is 0.6mm.
This coating is detected.Recording its bond strength by pulling method is 22.4MPa; Adopt electric spark method to detect the porosity of coating, this coating is not breakdown under 12KV voltage; Use the webster hardness of the coating of hardometer measurement to be 24.8HW; Adopt 3% NaCl and Na
2The S mixed solution, corrosion is 240 hours under 60 ℃ of conditions, and the corrosion rate of coating is less than 0.1mm/a.
Embodiment 2
Get high-density polyethylene powder, add in the powder bucket of polymers material cold spraying system.Get the X70 pipe line steel, according to a conventional method oil removing, rust cleaning and sandblast roughening treatment are carried out in its surface, then, clean with acetone; The sandblast angle of sandblast roughening treatment is 60 °～80 °.Open the air heater in the preheating pipeline, controlling its voltage is 220V, the air by this air heater is heated, and the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after the processing is that 1.0MPa, gas flow are 2.0m
3/ h, gas temperature are 240 ℃, make that the temperature of workpiece is 120 ℃ after the preheating; Open the powder feeding pipeline in the polymers material cold spraying system, regulate the gas flow controller in the powder feeding pipeline, the control gas flow is 2.5m
3/ h, this gas will be sent in the powder feeding pipe in the bushing type spray gun that is fixed in the powder feeding pipe way outlet by the macromolecule material powder that powder bucket bottom enters pipeline, open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 280V, air by this gas heater is heated, the temperature of the air after the heating is 180 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.5m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, spray distance is that 80mm, spray angle are that 95 °, spraying rate are 10cm/s, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtains levelling cured coating fully; Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.2m
3/ h sprays to uncured coating, to its heating, makes it the levelling crosslinking curing, obtains the coating that thickness is 1.0mm.
This coating is detected.Adopting pulling method to record its bond strength is that 7.67MPa adopts electric spark method to detect its porosity, does not puncture under 12KV voltage; Adopted the dichloroethanes immersion corrosion 72 hours, bubbling, warpage, phenomenon such as softening do not take place in coating; Adopt 3% NaCl and Na
2S solution, corrosion is 240 hours under 60 ℃ of conditions, and the corrosion rate of coating is less than 0.08mm/a.
Get high-density polyethylene powder, add in the powder bucket of polymers material cold spraying system.Get the X70 pipe line steel, according to a conventional method oil removing, rust cleaning and sandblast roughening treatment are carried out in its surface, then, clean with acetone; The sandblast angle of sandblast roughening treatment is 60 °～80 °.Open the air heater in the preheating pipeline, controlling its voltage is 220V, the air by this air heater is heated, and the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after the processing is that 0.9MPa, gas flow are 1.9m
3/ h, gas temperature are 220 ℃, make that the temperature of workpiece is 100 ℃ after the preheating; Open the powder feeding pipeline in the polymers material cold spraying system, regulate the gas flow controller in the powder feeding pipeline, the control gas flow is 2.4m
3/ h, this gas will be sent in the powder feeding pipe in the bushing type spray gun that is fixed in the powder feeding pipe way outlet by the macromolecule material powder that powder bucket bottom enters pipeline, open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 270V, air by this gas heater is heated, the temperature of heating back air is 200 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.4m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, spray distance is that 65mm, spray angle are that 90 °, spraying rate are 9cm/s, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtains levelling cured coating fully; Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.1m
3/ h sprays to coating, to its heating, makes it the levelling crosslinking curing, obtains the coating that thickness is 0.8mm.
This coating is detected.Adopting pulling method to record its bond strength is 10.18MPa; Adopt electric spark method to detect its porosity, under 12KV voltage, do not puncture; Adopted the dichloroethanes immersion corrosion 72 hours, bubbling, warpage, phenomenon such as softening do not take place in coating; Adopt 3% NaCl and Na
2S solution, corrosion is 240 hours under 60 ℃ of conditions, and the corrosion rate of coating is 0.1mm/a
System of the present invention adopts the thermal current of Controllable Temperature as thermal source, macromolecule material powder is fully mixed with thermal current, and plastified in thermal current, and the kinetic energy by thermal current sprays to matrix surface with macromolecular material, and cooling forms polymeric coating layer.Reduce the spraying heating-up temperature, avoided the phenomenons such as oxidation, scaling loss and degraded of macromolecule material powder particle; Simultaneously, reduce the substrate preheating temperature, avoid the variation of matrix structure.
Claims (5)
1. polymers material cold spraying system, it is characterized in that, comprise the powder feeding pipeline that is arranged in parallel, pipeline is solidified in preheating pipeline and spraying, these three pipelines communicate with the gas inlet pipe road respectively, described powder feeding pipeline is disposed with gas flow controller A (1) by gas flow direction, powder bucket (4) and bushing type spray gun (6), described preheating pipeline is disposed with gas flow controller B (2) and air heater A (3) by gas flow direction, air heater A (3) is connected with voltage controller A (9), described spraying pipeline is provided with air heater B (8), air heater B (8) is connected with voltage controller B (10), the spraying pipeline is divided into the branch road of two parallel connections after by air heater B (8), article one, branch road is by gas flow controller D (7), it is terminal affixed with bushing type spray gun (6), and another branch road is provided with gas flow controller C (5).
2. cold spraying system according to claim 1, it is characterized in that, described bushing type spray gun (6) comprises the gun body (6-3) of ring-type, the sidewall of gun body (6-3) is provided with air inlet (6-8), one end of gun body (6-3) is fixed with spout cover (6-1), the other end is connected with connection cover (6-5), connection cover (6-5) is fixedly connected with the sleeve pipe (6-4) of annular, one end of sleeve pipe (6-4) stretches in the gun body (6-3), and fixedly connected with the inwall of gun body (6-3), be provided with the powder feeding pipe (6-6) of hollow in the sleeve pipe (6-4), powder feeding pipe (6-6) is by two baffle plates (6-7) and the inwall that is fixed in sleeve pipe (6-4), and powder feeding pipe (6-6) and two baffle plates (6-7) are divided into not connected two parts with the endoporus of sleeve pipe (6-4).
3. cold spraying system according to claim 2 is characterized in that, described powder feeding pipe (6-6) is coaxial with sleeve pipe (6-4).
4. according to claim 2 or 3 described cold spraying systems, it is characterized in that described two baffle plates (6-7) are symmetrical in powder feeding pipe (6-6) setting.
5. a method of utilizing the described polymers material cold spraying system of claim 1 to prepare coating is characterized in that, carries out according to the following steps:
Step 1: handle on the surface to the workpiece of need spray-on coating
To the surface of the workpiece of need spray-on coating, carry out oil removing, rust cleaning and sandblast roughening treatment according to a conventional method, then, clean with acetone;
Step 2: the surface of the work spraying solidified coating after processing
Adopt a polymers material cold spraying system, this system comprises the powder feeding pipeline that is arranged in parallel, pipeline is solidified in preheating pipeline and spraying, these three pipelines communicate with the gas inlet pipe road respectively, described powder feeding pipeline is disposed with gas flow controller A (1) by gas flow direction, powder bucket (4) and bushing type spray gun (6), bushing type spray gun (6) is fixed in the end of powder feeding pipeline, described preheating pipeline is disposed with gas flow controller B (2) and air heater A (3) by gas flow direction, air heater A (3) is connected with voltage controller A (9), described spraying pipeline is provided with air heater B (8), air heater B (8) is connected with voltage controller B (10), the spraying pipeline is divided into the branch road of two parallel connections after by air heater B (8), article one, branch road is by gas flow controller D (7), it is terminal affixed with bushing type spray gun (6), another branch road is provided with gas flow controller C (5)
Open the air heater in the preheating pipeline, controlling its voltage is 220V, air by this air heater is heated, the adjustments of gas flow controller, the gas pressure that control sprays to the surface of the work after step 1 is handled is that 0.8MPa～1.0MPa, gas flow are 1.8m
3/ h～2.0m
3/ h, gas temperature are 200 ℃～240 ℃, make that the temperature of workpiece is 80 ℃～120 ℃ after the preheating;
Open the powder feeding pipeline, regulate the gas flow controller that is provided with in the powder feeding pipeline, the control gas flow is 2.3m
3/ h～2.5m
3/ h, this gas will be sent in the powder feeding pipe in the bushing type spray gun that is fixed in the powder feeding pipe way outlet by the macromolecule material powder that powder bucket bottom enters pipeline,
Open the gas heater in the spraying curing pipeline, voltage by voltage controller control gas heater is 260V～280V, air by this gas heater is heated, the temperature of the air after the heating is 160 ℃～200 ℃, enter the bushing type spray gun respectively and solidify branch road, the gas flow controller that adjusting links to each other with the bushing type spray gun, the hot gas flow that control enters the bushing type spray gun is 2.3m
3/ h～2.5m
3/ h, this hot gas is through gun body, the outlet ejection that the spout that is provided with from bushing type spray gun front end under the effect of gas pressure overlaps, simultaneously, enter of the outlet ejection of the macromolecule material powder of powder feeding pipe from powder feeding pipe, this powder fully mixes in the spout cover with hot gas, macromolecule material powder is plastified, and the kinetic energy by thermal current, macromolecular material is sprayed at surface of the work after the preheating, obtain incomplete levelling cured coating, the adopting process parameter is in the spraying process: spray distance 50mm～80mm, 85 °～95 ° of spray angles, spraying rate 8cm/s～10cm/s
Adjusting is arranged at the gas flow controller that solidifies branch road, and the gas flow of controlling in this branch road is 1.0m
3/ h～1.2m
3/ h sprays to coating, to the coating heating, makes its levelling crosslinking curing, obtains the coating that thickness is 0.6mm～1.0mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102317769A CN101380622B (en) | 2008-10-16 | 2008-10-16 | Polymers material cold spraying system and preparation method of coatings |
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| CN2008102317769A CN101380622B (en) | 2008-10-16 | 2008-10-16 | Polymers material cold spraying system and preparation method of coatings |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN2494708Y (en) * | 2001-09-05 | 2002-06-12 | 中国科学院金属研究所 | Cool air dynamic spraying apparatus |
| KR100515608B1 (en) * | 2003-12-24 | 2005-09-16 | 재단법인 포항산업과학연구원 | Cold spray apparatus with powder preheating apparatus |
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2008
- 2008-10-16 CN CN2008102317769A patent/CN101380622B/en not_active Expired - Fee Related
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| CN102240618A (en) * | 2011-06-27 | 2011-11-16 | 无锡西姆莱斯石油专用管制造有限公司 | Adjustable borax nozzle foundation device |
| CN102861713A (en) * | 2012-09-04 | 2013-01-09 | 河南省超贝工程设备有限公司 | Ultra-high molecular weight polyethylene coating and preparation method thereof |
| CN103451593A (en) * | 2013-09-24 | 2013-12-18 | 无锡市福莱达石油机械有限公司 | Spray gun device for avoiding spraying overheat of thin plate parts |
| CN105927822A (en) * | 2016-04-21 | 2016-09-07 | 中石化河南油建工程有限公司 | Corrosion-resistance composite pipe and manufacturing method thereof |
| CN108937605A (en) * | 2017-05-26 | 2018-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Cookware and cooking apparatus |
| CN110860440A (en) * | 2019-11-07 | 2020-03-06 | 湖南工业大学 | Polylactic acid high-barrier spraying treatment device |
| CN111085402A (en) * | 2020-01-08 | 2020-05-01 | 石河子大学 | Industrial pipeline coating preparation method and device based on cold coating method and induction cladding technology |
| CN112427160A (en) * | 2020-10-06 | 2021-03-02 | 湖北超卓航空科技股份有限公司 | Cold spray gun |
| CN113019733A (en) * | 2021-03-10 | 2021-06-25 | 中北大学 | Spraying powder feeding system and method for controlling different powder mixing ratios |
| CN114749317A (en) * | 2022-04-01 | 2022-07-15 | 中国科学院长春应用化学研究所 | Powder spraying curing system |
| CN114749317B (en) * | 2022-04-01 | 2023-12-19 | 中国科学院长春应用化学研究所 | Powder spraying curing system |
| CN116080095A (en) * | 2023-01-30 | 2023-05-09 | 浙江久石工研建材科技有限公司 | Manufacturing process of rammed-soil-imitating flexible patch stone |
| CN116080095B (en) * | 2023-01-30 | 2023-09-19 | 浙江久石工研建材科技有限公司 | Manufacturing process of rammed-soil-imitating flexible patch stone |
| CN116213153A (en) * | 2023-05-05 | 2023-06-06 | 季华实验室 | Cold spraying spray gun and cold spraying device |
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