CN111359814B - Pipeline inner wall paint spraying system - Google Patents
Pipeline inner wall paint spraying system Download PDFInfo
- Publication number
- CN111359814B CN111359814B CN202010242705.XA CN202010242705A CN111359814B CN 111359814 B CN111359814 B CN 111359814B CN 202010242705 A CN202010242705 A CN 202010242705A CN 111359814 B CN111359814 B CN 111359814B
- Authority
- CN
- China
- Prior art keywords
- sprayer
- pipe
- spraying
- nozzle
- sprayed
- 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.)
- Active
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 122
- 239000003973 paint Substances 0.000 title claims abstract description 83
- 238000000576 coating method Methods 0.000 claims abstract description 69
- 239000011248 coating agent Substances 0.000 claims abstract description 63
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000000605 extraction Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000008602 contraction Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 22
- 238000012360 testing method Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 9
- 238000011056 performance test Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0663—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and the hollow bodies being translated in a direction parallel to the rotational axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
Landscapes
- Spray Control Apparatus (AREA)
Abstract
The invention discloses a coating spraying system for the inner wall of a pipeline, and relates to the technical field of pipeline spraying. The invention comprises a supporting unit, a spraying unit and a supply unit; the support unit supports the spraying unit, and the supply unit is used for supplying an air source and paint; the spraying unit comprises a first sprayer, a heater and a second sprayer, and the first sprayer, the heater and the second sprayer are sequentially arranged on the supporting rod; the first sprayer, the sprayer and the second sprayer are communicated with the supply unit; in the invention, in the process of reversely moving the pipe to be sprayed along the arrangement direction of the first sprayer, the heater and the second sprayer, the first paint spraying is performed; then the sprayer sprays the non-tightly combined paint at the position; then the primary coating spray coating is heated and strengthened through a heater, and finally the secondary coating spray coating is carried out on the position by a second sprayer; the bonding strength of the coating on the inner wall of the pipe to be sprayed is improved through the process.
Description
Technical Field
The invention relates to the technical field of pipeline spraying, in particular to a pipeline inner wall paint spraying system.
Background
Pipelines are an important component of industrial and domestic facilities, and are also the main facilities in pipeline transportation. With the rapid development of the industry in China and the improvement of the construction speed of urban public facilities, pipeline construction is also rapidly developed; transport pipelines are in service in a relatively harsh environment in some cases, and corrosion and protection problems thereof are always key factors related to the reliability and service life of the pipeline.
At present, aiming at the protection of the inner wall of a metal pipeline, the method adopted generally is to coat anti-corrosion and non-stick paint on the inner wall of the pipeline, the anti-corrosion and non-stick paint on the inner wall of the pipeline has the advantages of low cost, easy realization, good adhesiveness and the like, but the spraying equipment of the inner wall of the existing metal pipeline is mostly a long-rod spray gun, an operator has to hold the long-rod spray gun to spray the inner wall of the metal pipeline in the spraying process, the coating is easy to spray unevenly in the spraying process, the fluctuation of the thickness of the fired coating is larger, and the bonding stability of the spray paint on the inner wall of the pipeline is poor.
The automatic spraying is a spraying method which is automatically controlled by using an electric appliance or a mechanical principle (a mechanical arm or a robot), the automatic spraying is mainly controlled and monitored by an industrial control computer (PLC) program, an automatic spraying production line is generally arranged in a closed space and comprises a conveying unit, a dust removing unit, a spraying unit, an exhaust unit and a drying unit, the dust removing unit, the spraying unit and the drying unit are arranged in each partition, the exhaust unit is arranged in each partition, the conveying mechanism penetrates through the whole automatic spraying production line, a workpiece or a product enters a spraying chamber or a spraying room of the spraying unit for spraying through the conveying mechanism after dust removal of the dust removing unit, is dried after being sprayed, enters a baking unit for drying, and is output through a finished product of the conveying mechanism, and industrial waste gas which is diffused in each partition and contains dust and atomized paint waste gas is discharged through the exhaust unit. Although the uniformity of spraying can be improved in the spraying process of the automatic coating spraying unit at present, the spraying coating is difficult to be effectively combined with the inner wall of the pipeline.
Through retrieval, patent publication No. CN110314792A discloses an automatic spraying unit for workpieces with long and thin structures, a box-shaped cover with a closed inner cavity is arranged at the butt joint position of two adjacent sections of conveying sections of a conveying line in a butt joint connection end to end in a straddling manner, the length dimension of the box-shaped cover along the front and back direction is smaller than the length dimension of the workpieces with long and thin structures, and a spraying input port and a spraying output port are arranged at the positions of the box-shaped cover corresponding to the conveying line; the butt joint position of two adjacent conveying sections of the conveying line is also provided with a transition carrying wheel matched with the bottom of the pallet; although the technical scheme of the patent can improve the uniformity degree of pipeline inner wall coating spraying to a certain extent, the coating is sprayed to the pipeline inner wall only through a one-time spraying mode, so that the combination degree of the coating on the inner wall is difficult to ensure, and the service life prolonging effect of the pipeline after spraying is influenced to a certain extent.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problem of low bonding strength of a coating sprayed by a device for spraying the inner wall of a pipeline in the prior art, and provides a pipeline inner wall coating spraying system.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The invention relates to a coating spraying system for the inner wall of a pipeline, which comprises a supporting unit, a spraying unit and a supply unit; the support unit comprises a support table, 2 support frames, a support rod and a moving table, wherein the support rod is horizontally arranged above the support table, and two ends of the support rod are respectively supported by the support frames; a movable table is translatably arranged on the supporting table, a pipe to be sprayed is rotatably arranged on the movable table, and the supporting rod is positioned in the pipe to be sprayed; the support rod is provided with a spraying unit; the spraying unit comprises a first sprayer, a heater and a second sprayer, and the first sprayer, the heater and the second sprayer are sequentially arranged on the supporting rod; the first sprayer, the sprayer and the second sprayer are communicated with the supply unit; the supply unit comprises a coating tank and a gas tank, wherein the coating tank is connected with the first sprayer, the sprayer and the second sprayer through pipelines, and the gas tank is connected with the sprayer through pipelines.
Preferably, the movable table is provided with a support bearing, and the support bearing is used for installing the pipe to be sprayed so that the pipe to be sprayed can axially rotate; the movable table is also provided with a driver for driving the axis of the to-be-sprayed pipe to rotate.
Preferably, the sprayer comprises a first sprayer, a first sprayer nozzle is arranged on the first sprayer, the spraying direction of the first sprayer nozzle is obliquely arranged, and the oblique direction of the first sprayer nozzle faces the direction of the first sprayer nozzle, which is close to the first sprayer.
Preferably, the sprayer includes first sprayer, is provided with first jetting nozzle on the first sprayer, and first jetting nozzle is the lapel spray tube, including shrink section and expansion section, the shrink initiating terminal of shrink section passes through the coating pipeline and links to each other with the coating jar, and the lateral part of expansion section passes through the vent line and links to each other with the gas pitcher.
Preferably, an air extraction opening is arranged between the first sprayer and the first sprayer, and the air extraction direction of the air extraction opening faces the first sprayer; the air extraction opening is communicated to the air exhaust opening through a pipeline.
Preferably, the heater is an infrared heating pipe, and the length of the heater along the axial direction of the supporting rod is L, wherein L is more than or equal to 9.5m and less than or equal to 10m; the distance from the blowing nozzle on the blower to the heater is d2, wherein d2 is more than or equal to 0.3m and less than or equal to 0.35m; the distance from the second nozzle to the heater on the second sprayer is d3, wherein d3 is more than or equal to 0.3m and less than or equal to 0.35m.
Preferably, the paint tank is connected with the first sprayer, the sprayer and the second sprayer through a spraying pump, and the air tank is connected with the sprayer through an air pump.
Preferably, the inclination angle of the first spray nozzle is alpha, the distance from the first spray nozzle to the inner wall of the pipe to be sprayed is h, and the inclination angle alpha meets the following conditions: tan α=k·h, where 0 < k+.1.
Preferably, the sprayer further comprises a second sprayer, and the second sprayer is arranged on one side of the first sprayer close to the first sprayer; the second jetting device is provided with a second jetting nozzle which is connected with the gas tank through a pipeline.
Preferably, the distance from the first nozzle on the first sprayer to the first nozzle on the first sprayer is d1, wherein d1 is 0.2 m.ltoreq.d1.ltoreq.0.3 m.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) The invention relates to a coating spraying system for the inner wall of a pipeline, which comprises a supporting unit, a spraying unit and a supply unit; the support unit comprises a support table, 2 support frames, a support rod and a moving table, wherein the support rod is horizontally arranged above the support table, and two ends of the support rod are respectively supported by the support frames; a movable table is translatably arranged on the supporting table, a pipe to be sprayed is rotatably arranged on the movable table, and the supporting rod is positioned in the pipe to be sprayed; the support rod is provided with a spraying unit; the spraying unit comprises a first sprayer, a heater and a second sprayer, and the first sprayer, the heater and the second sprayer are sequentially arranged on the supporting rod; the first sprayer, the sprayer and the second sprayer are communicated with the supply unit; the supply unit comprises a coating tank and a gas tank, the coating tank is connected with the first sprayer, the sprayer and the second sprayer through pipelines, and the gas tank is connected with the sprayer through pipelines; the to-be-sprayed pipe rotates on a moving table of the supporting unit, and the moving table drives the to-be-sprayed pipe to spray paint once in the process of passing a certain position on the inner wall of the to-be-sprayed pipe in the process of driving the to-be-sprayed pipe to reversely move along the arrangement directions of the first sprayer, the heater and the second sprayer; then the sprayer sprays the paint to remove the paint which is not tightly combined with the outer surface of the primary paint spraying coating; then the primary coating spray coating is heated and strengthened through a heater, and finally the secondary coating spray coating is carried out on the position by a second sprayer; the bonding strength of the coating on the inner wall of the pipe to be sprayed can be greatly improved through the process.
(2) The invention relates to a paint spraying system for the inner wall of a pipeline, which comprises a first sprayer, wherein a first spraying nozzle is arranged on the first sprayer, the spraying direction of the first spraying nozzle is obliquely arranged, the oblique direction of the first spraying nozzle faces to the direction of the first sprayer, which is close to the first sprayer, the first spraying nozzle can better realize the blowing effect of the primary paint spraying coating, which is not tightly combined with the paint, on the outer surface of the primary paint spraying coating, and can reduce the damage of the primary paint spraying coating with better combination in the process, thereby being beneficial to improving the combination effect of the subsequent paint on the inner wall of the pipeline to be sprayed.
Drawings
FIG. 1 is a schematic diagram of a system for coating the inner wall of a pipe according to the present invention;
FIG. 2 is a schematic diagram of the arrangement of a spray unit in a pipeline inner wall paint spray system according to the present invention;
fig. 3 is a schematic structural view of a first nozzle according to the present invention.
Reference numerals in the schematic drawings illustrate:
110. A support table; 120. a support frame; 130. a support rod; 140. a mobile station; 141. a support bearing; 142. a driver; 150. a pipe to be sprayed;
210. A first sprayer; 211. a first nozzle; 220. a first blower; 221. an extraction opening; 222. a first nozzle; 223. an expansion section; 224. a constriction section; 225. a ventilation duct; 226. a paint pipe; 230. a heater; 240. a second sprayer; 241. a second nozzle; 250. a second blower; 251. a second nozzle;
310. A paint tank; 311. a stirrer; 312. a spray pump; 320. a gas tank; 321. an air pump; 330. and an exhaust port.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the invention, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the invention, without affecting the effect or achievement of the objective. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, but the changes or modifications of the relative relationship thereof are also regarded as the scope of the present invention which can be implemented without substantial modification to the technical content; in addition, the embodiments of the present invention are not independent of each other, but may be combined.
Example 1
As shown in fig. 1, a coating material spraying system for an inner wall of a pipe according to the present embodiment includes a supporting unit, a spraying unit, and a supplying unit; the supporting unit comprises a supporting table 110, 2 supporting frames 120, a supporting rod 130 and a moving table 140, wherein the supporting rod 130 is horizontally arranged above the supporting table 110, and two ends of the supporting rod 130 are respectively supported by the supporting frames 120; and at least one of the two ends of the support rod 130 is separately disposed from the support frame 120, so that the pipe 150 to be sprayed can be sleeved outside the support rod 130 when in use.
The support table 110 is provided with a moving table 140, the moving table 140 rotatably places the pipe 150 to be sprayed, specifically, the moving table 140 is provided with support bearings 141, the support bearings 141 are used for mounting the pipe 150 to be sprayed, in this embodiment, at least 2 support bearings 141 are provided, and when in use, the support bearings 141 are mounted at two ends of the pipe 150 to be sprayed, so that the pipe 150 to be sprayed can rotate axially; a driver 142 is further provided on the moving stage 140 for driving the pipe 150 to be sprayed to axially rotate. In this embodiment, the driver 142 includes a motor and a rotating wheel driven by the motor, where the surface of the rotating wheel may be made of a material with relatively large friction and flexible, such as a rubber material, and the surface of the rotating wheel contacts with the outer surface of the pipe 150 to be sprayed, and the rotating wheel rotates to drive the pipe 150 to be sprayed to rotate, and the rotating speed of the pipe 150 to be sprayed and the spraying unit relatively rotate axially is 10-100 r/min; in this embodiment, the rotational speed of the tube 150 to be sprayed is 75r/min.
In addition, the moving table 140 is arranged on the supporting table 110 in a translatable manner, in this embodiment, the moving table 140 translates on the supporting table 110 in a worm transmission manner, the supporting rod 130 is provided with a spraying unit, the supporting rod 130 is located in the pipe 150 to be sprayed, the moving table 140 drives the pipe 150 to be sprayed thereon to move, and the spraying unit sprays the inner wall of the pipe 150 to be sprayed in the pipe 150 to be sprayed.
The spraying unit includes a first sprayer 210, a sprayer, a heater 230, and a second sprayer 240, and the first sprayer 210, the sprayer, the heater 230, and the second sprayer 240 are sequentially disposed on the support bar 130; as shown in fig. 2, before the inner wall of the pipe 150 to be sprayed starts to be sprayed, the pipe 150 to be sprayed is positioned at the first sprayer 210 at the leftmost end in fig. 2 under the driving of the moving table 140, and when the pipe 150 to be sprayed starts to be sprayed, the moving table 140 drives the pipe 150 to be sprayed to move rightward in fig. 2, that is, the pipe 150 to be sprayed moves in a direction opposite to the direction in which the first sprayer 210, the blower, the heater 230 and the second sprayer 240 are arranged at the support bar 130; the relative translational speed of the pipe 150 to be sprayed and the spraying unit along the axial direction is 80-800 mm/min, and the movement speed in the embodiment is 370mm/min.
The first sprayer 210, the blower, and the second sprayer 240 are in communication with a supply unit; the supply unit is used to supply the first sprayer 210, the sprayer, and the second sprayer 240 with the spray paint or gas. The supply unit includes a paint tank 310 and a gas tank 320, the paint tank 310 being connected to the first sprayer 210, the sprayer, and the second sprayer 240 through pipes, and the gas tank 320 being connected to the sprayer through pipes. And the paint tank 310 is connected to the first sprayer 210, the sprayer and the second sprayer 240 by a spraying pump 312, the spraying pump 312 serving to pump paint in the paint tank 310 into the first sprayer 210 and/or the sprayer and/or the second sprayer 240; the gas tank 320 is connected to the blower by a gas pump 321, and the gas pump 321 functions to pump the gas in the gas tank 320 into the blower.
During the movement of the pipe 150 to be sprayed, for a certain spraying position on the inner wall of the pipe 150 to be sprayed, the first sprayer 210 first sprays the paint on the position, and the first nozzle 211 of the first sprayer 210 sprays the paint on the spraying position to form a primary paint spraying coating, wherein the thickness of the primary paint spraying coating is 0.4-0.6mm, and in the embodiment, the thickness of the primary paint spraying coating is 0.5mm. The rotating pipe 150 to be sprayed is advantageous in that the primary paint spray coating is coated more uniformly on the one hand, and on the other hand, the primary paint spray coating is adhered to the inner wall of the pipe 150 to be sprayed, and the combination effect of the primary paint spray coating and the inner wall of the pipe 150 to be sprayed is further improved under the centrifugal force effect due to the rotation of the pipe 150 to be sprayed. However, there is a problem that the surface layer of the formed primary paint spray coating still has poor bonding strength, and the presence of the low bonding strength paint still causes deterioration of the coating quality.
After primary spraying, the spraying position moves to the corresponding position of the sprayer, the sprayer comprises a first sprayer 220, a first sprayer nozzle 222 is arranged on the first sprayer 220, the spraying direction of the first sprayer nozzle 222 is obliquely arranged, the direction of the oblique direction of the first sprayer nozzle 222 faces the direction of the first sprayer 220, which is close to the first sprayer 210, and the first sprayer nozzle 222 can better realize the blowing effect of the coating, which is not tightly combined with the coating, of the primary coating, on the outer surface of the sprayed coating through oblique spraying.
In addition, as shown in fig. 3, the first blowing nozzle 222 is a raoul nozzle, and includes a contraction section 224 and an expansion section 223, wherein a contraction start end of the contraction section 224 is connected to the gas tank 320 through a gas pipe 225, and a side portion of the expansion section 223 is connected to the paint tank 310 through a paint pipe 226. The gas blows the primary paint spraying coating at a higher speed under the action of the Raoult nozzle, and meanwhile, the paint entering from the side part of the expansion section 223 is impacted by the high-speed gas in the expansion section 223 to form fog drops, and the paint fog drops are blown to the inner wall of the pipe 150 to be sprayed together with the high-speed gas flow, so that the paint fog drops are combined with the primary paint spraying coating in a better strength; in addition, the first nozzle 222 has an inclination angle α, the first nozzle 222 has a distance h from the inner wall of the pipe 150 to be sprayed, and the inclination angle α satisfies: tan α=k·h, where 0 < k+.1, in this example k is 0.45; the arrangement can reduce the damage of primary paint spray coating with better combination in the process on the premise of ensuring the spraying effect, and is beneficial to improving the combination effect of the subsequent coating on the inner wall of the pipe 150 to be sprayed.
It should be noted that, in the process of spraying the primary paint spray coating, the first spraying nozzle 222 also atomizes and splashes the paint with weak bonding force on the original surface layer of the primary paint spray coating, so that the sprayer in this embodiment further includes a second sprayer 250, and the second sprayer 250 is disposed on one side of the first sprayer 220 close to the first sprayer 210; the second blower 250 is provided with a second blower nozzle 251, and the second blower nozzle 251 is connected with the gas tank 320 through a pipe; the spraying of the second spraying nozzle 251 can make the first spraying nozzle 222 spray the paint that generates atomized and splashed to be recombined to the surface of the primary paint spray coating, at this time, it can be fully combined with the primary paint spray coating, and the effect of strengthening the coating is achieved.
An air extraction opening 221 is arranged between the first sprayer 220 and the first sprayer 210, and the air extraction direction of the air extraction opening 221 faces the first sprayer 220; the pumping port 221 is communicated to the exhaust port 330 through a pipe; the suction opening 221 serves to discharge the residual atomized and splashed paint from the interior of the pipe 150 to be sprayed.
In addition, the distance from the first blowing nozzle 222 on the first blower 220 to the first nozzle 211 on the first sprayer 210 is d1, where 0.2 m.ltoreq.d1.ltoreq.0.3 m.
After the primary paint spray coating is subjected to spraying treatment, the primary paint spray coating is heated and strengthened by the heater 230, the heater 230 is an infrared heating pipe, the length of the heater 230 along the axial direction of the supporting rod 130 is L, wherein L is more than or equal to 9.5m and less than or equal to 10m, the heating temperature of the heater 230 is 45-80 ℃, and the heating temperature in the embodiment is 65 ℃. The primary paint spray coating can be primarily strengthened by heating the primary paint spray coating. The primary paint after the heating and strengthening is sprayed with the coating and then is sprayed with the secondary paint to the second sprayer 240 to form a secondary paint sprayed coating, and the overall thickness of the coating is 0.8-1.2 mm, namely, the overall thickness of the primary paint sprayed coating and the secondary paint sprayed coating is 0.8-1.2 mm, and in the embodiment, 1.0mm. The corrosion resistance of the coating formed by combining the primary coating spray coating and the secondary coating spray coating is better, and the distance from a spray nozzle on a sprayer to the heater 230 is d2, wherein d2 is more than or equal to 0.3m and less than or equal to 0.35m; the distance from the second nozzle 241 to the heater 230 on the second sprayer 240 is d3, where 0.3 m.ltoreq.d3.ltoreq.0.35 m.
Taking a sample of the inner wall of the pipeline, and performing the following performance tests:
Impact strength test: drop hammer test (small area punch) according to ISO 6272-2e 2002;
Abrasion resistance test: abrasion resistance rating method for organic coatings tested according to astm d 968-93 (2001) shakeout method;
Weather resistance test: according to GB/T1865-1997;
The results of the performance test are shown in Table 1.
Comparative example 1
The present embodiment is basically the same as embodiment 1, except that the spraying unit in this embodiment includes only the first sprayer 210, the heater 230 and the second sprayer 240, no sprayer is provided, other device parameters are the same as those in embodiment 1, and the first sprayer 210 sprays a primary paint coating on the inner wall of the pipe, and the thickness of the primary paint coating is 0.5mm; heating by the heater 230 until the second sprayer 240 is sprayed to form a secondary paint spray coating, wherein the total thickness of the secondary paint spray coating and the primary paint spray coating is 1.0mm; there is no blowing process in the middle.
Taking a sample of the inner wall of the pipeline, and performing the following performance tests:
Impact strength test: drop hammer test (small area punch) according to ISO 6272-2e 2002;
Abrasion resistance test: abrasion resistance rating method for organic coatings tested according to astm d 968-93 (2001) shakeout method;
Weather resistance test: according to GB/T1865-1997;
The results of the performance test are shown in Table 1.
Comparative example 2
The present embodiment is basically the same as embodiment 1, except that the spraying unit in this embodiment includes only the first sprayer 210, the blower and the second sprayer 240, the heater 230 is not provided, other parameters of the apparatus are the same as those in embodiment 1, and the first sprayer 210 sprays a primary paint coating on the inner wall of the pipe, and the thickness of the primary paint coating is 0.5mm; then spraying by a sprayer, wherein the spraying parameters are the same as those of the embodiment 1, and spraying at the position of the second sprayer 240 to form a secondary paint spraying coating, and the total thickness of the secondary paint spraying coating and the primary paint spraying coating is 1.0mm; there is no heating process in between. Taking a sample of the inner wall of the pipeline, and performing the following performance tests:
Impact strength test: drop hammer test (small area punch) according to ISO 6272-2e 2002;
Abrasion resistance test: abrasion resistance rating method for organic coatings tested according to astm d 968-93 (2001) shakeout method;
Weather resistance test: according to GB/T1865-1997;
The results of the performance test are shown in Table 1.
Comparative example 3
The present embodiment is basically the same as embodiment 1, except that the spraying unit in this embodiment includes only the first sprayer 210, the sprayer and the heater 230, the second sprayer 240 is not provided, other parameters of the apparatus are the same as those of embodiment 1, and the first sprayer 210 sprays a primary paint coating on the inner wall of the pipe, and the thickness of the primary paint coating is 1.0mm; blowing by a blower, and heating and curing after blowing; the blowing preheating parameters were the same as in example 1; there is no secondary spraying. Taking a sample of the inner wall of the pipeline, and performing the following performance tests:
Impact strength test: drop hammer test (small area punch) according to ISO 6272-2e 2002;
Abrasion resistance test: abrasion resistance rating method for organic coatings tested according to astm d 968-93 (2001) shakeout method;
Weather resistance test: according to GB/T1865-1997;
The results of the performance test are shown in Table 1.
Table 1 comparative performance graphs for various examples
As can be seen from table 1, the coatings formed in example 1 have significantly improved impact strength, abrasion resistance, and weatherability compared to the coatings in comparative examples 1-3.
The application has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will be understood that various modifications and changes may be made without departing from the scope of the application as defined by the following claims. The detailed description and drawings are to be regarded in an illustrative rather than a restrictive sense, and if any such modifications and variations are desired to be included within the scope of the application described herein. Furthermore, the background art is intended to illustrate the state of the art and the meaning of the development and is not intended to limit the application or the field of application of the application.
More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments, but includes any and all embodiments that have been modified, omitted, e.g., combined, adapted, and/or substituted between the various embodiments, as would be recognized by those skilled in the art in light of the foregoing detailed description. The limitations in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the invention should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.
Claims (7)
1. A pipeline inner wall paint spraying system is characterized by comprising a supporting unit, a spraying unit and a supply unit;
The supporting unit comprises a supporting table (110), 2 supporting frames (120), a supporting rod (130) and a moving table (140), wherein the supporting rod (130) is horizontally arranged above the supporting table (110), and two ends of the supporting rod (130) are respectively supported by the supporting frames (120); a movable table (140) is translatably arranged on the supporting table (110), a pipe (150) to be sprayed is rotatably arranged on the movable table (140), and the supporting rod (130) is positioned in the pipe (150) to be sprayed; the support rod (130) is provided with a spraying unit;
The spraying unit comprises a first sprayer (210), a sprayer, a heater (230) and a second sprayer (240), and the first sprayer (210), the sprayer, the heater (230) and the second sprayer (240) are sequentially arranged on the supporting rod (130); the first sprayer (210), the sprayer and the second sprayer (240) are communicated with a supply unit;
The supply unit comprises a coating tank (310) and an air tank (320), wherein the coating tank (310) is connected with the first sprayer (210), the sprayer and the second sprayer (240) through pipelines, and the air tank (320) is connected with the sprayer through pipelines;
The sprayer comprises a first sprayer (220), a first sprayer nozzle (222) is arranged on the first sprayer (220), the spraying direction of the first sprayer nozzle (222) is obliquely arranged, and the oblique direction of the first sprayer nozzle is towards the direction of the first sprayer (220) approaching to the first sprayer (210);
the sprayer comprises a first sprayer (220), a first sprayer nozzle (222) is arranged on the first sprayer (220), the first sprayer nozzle (222) is a Raoult spray pipe and comprises a contraction section (224) and an expansion section (223), the contraction starting end of the contraction section (224) is connected with a gas tank (320) through a ventilation pipeline (225), and the side part of the expansion section (223) is connected with a paint tank (310) through a paint pipeline (226);
an extraction opening (221) is arranged between the first sprayer (210) and the first sprayer (220), and the extraction direction of the extraction opening (221) faces the first sprayer (220); the air extraction opening (221) is communicated to the air exhaust opening (330) through a pipeline.
2. A pipe inner wall paint spraying system as claimed in claim 1 wherein the moving stage (140) is provided with a support bearing (141), the support bearing (141) being adapted to mount the pipe (150) to be sprayed such that the pipe (150) to be sprayed is axially rotatable; the movable table (140) is also provided with a driver (142) for driving the pipe (150) to be sprayed to axially rotate.
3. The system for coating an inner wall of a pipe according to claim 1, wherein the heater (230) is an infrared heating pipe, and the length of the heater (230) along the axial direction of the support rod (130) is L, wherein L is 9.5 m.ltoreq.l.ltoreq.10m; the distance from the blowing nozzle on the blower to the heater (230) is d2, wherein d2 is more than or equal to 0.3m and less than or equal to 0.35m; the distance from the second nozzle (241) to the heater (230) on the second sprayer (240) is d3, wherein d3 is more than or equal to 0.3m and less than or equal to 0.35m.
4. A pipe inner wall paint spray system according to claim 1, characterized in that the paint tank (310) is connected to the first sprayer (210), the sprayer and the second sprayer (240) by means of a spray pump (312), and the gas tank (320) is connected to the sprayer by means of a gas pump (321).
5. The system for spraying a coating material on an inner wall of a pipe according to claim 1, wherein the first nozzle (222) has an inclination angle α, and the first nozzle (222) is spaced from the inner wall of the pipe (150) to be sprayed by a distance h, and the inclination angle α satisfies: tan α=k·h, where 0< k+.1.
6. The system of claim 1, wherein the sprayer further comprises a second sprayer (250), the second sprayer (250) being disposed on a side of the first sprayer (220) adjacent to the first sprayer (210); the second jetting device (250) is provided with a second jetting nozzle (251), and the second jetting nozzle (251) is connected with the gas tank (320) through a pipeline.
7. A pipe inner wall paint spray system as claimed in claim 1, wherein the first spray nozzle (222) on the first sprayer (220) is spaced from the first spray nozzle (211) on the first sprayer (210) by a distance d1, wherein 0.2 m.ltoreq.d1.ltoreq.0.3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242705.XA CN111359814B (en) | 2020-03-31 | 2020-03-31 | Pipeline inner wall paint spraying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242705.XA CN111359814B (en) | 2020-03-31 | 2020-03-31 | Pipeline inner wall paint spraying system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111359814A CN111359814A (en) | 2020-07-03 |
| CN111359814B true CN111359814B (en) | 2024-07-26 |
Family
ID=71201164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010242705.XA Active CN111359814B (en) | 2020-03-31 | 2020-03-31 | Pipeline inner wall paint spraying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111359814B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458451B (en) * | 2020-10-27 | 2023-06-23 | 江苏众信绿色管业科技有限公司 | Inner wall strengthening process and strengthening equipment for composite stainless steel pipe with inner lining |
| CN112691875A (en) * | 2020-12-20 | 2021-04-23 | 李占群 | Urban sewer pipeline anticorrosion process method |
| CN117282584B (en) * | 2023-11-22 | 2024-02-09 | 天成涂装系统(常州)有限公司 | Engineering machinery rust-proof coating device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212167920U (en) * | 2020-03-31 | 2020-12-18 | 北京博研中能科技有限公司 | Pipeline inner wall coating spraying system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003265990A (en) * | 2002-03-13 | 2003-09-24 | Kurimoto Ltd | Pipe outside surface coating method and apparatus for the same |
| US8529992B2 (en) * | 2007-03-23 | 2013-09-10 | Duct Seal Technologies, Llc | Method and apparatus for coating ducts |
| KR102593063B1 (en) * | 2015-10-12 | 2023-10-25 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Layer coating apparatus and method |
| CN110314792B (en) * | 2019-05-30 | 2020-07-03 | 浩德重工科技(江苏)有限公司 | Spraying method of automatic spraying unit for workpiece with long and thin structure |
-
2020
- 2020-03-31 CN CN202010242705.XA patent/CN111359814B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212167920U (en) * | 2020-03-31 | 2020-12-18 | 北京博研中能科技有限公司 | Pipeline inner wall coating spraying system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111359814A (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111482346A (en) | Pipeline inner wall spraying method based on reinforced primer coating | |
| CN111359814B (en) | Pipeline inner wall paint spraying system | |
| JP3173913U (en) | Automatic painting production line for anti-corrosion coating on large steel pipes | |
| CN110773365A (en) | Multi-angle automatic paint spraying equipment for machining mechanical parts | |
| CN113578631B (en) | Cable intelligence spraying production line | |
| CN212167920U (en) | Pipeline inner wall coating spraying system | |
| CN101862725A (en) | Steel-plastic composite pipe spraying device | |
| CN108465577A (en) | A kind of paint line and its production method of suitable assembled pipe-line system | |
| CN108525897A (en) | A kind of auto parts paint-spraying production line | |
| CN103770011A (en) | Sand blasting rust removal device | |
| CN207770125U (en) | A kind of pcb board spraying equipment | |
| CN105312181A (en) | Automatic spraying equipment of large-diameter plastic-coated steel pipe | |
| CN117772495A (en) | Ultraviolet curing steel pipe painting equipment | |
| CN110102431A (en) | One kind is for spray equipment used in engineering shop | |
| CN108504982A (en) | Paint finishing | |
| CN205341143U (en) | A segmented variable speed and flexible butt joint spraying intelligent assembly line | |
| CN110756367A (en) | A equipment for auto-parts surface sprays paint | |
| CN220825002U (en) | Paint spraying and cleaning mechanism for vehicle brake drum | |
| CN114751657A (en) | Coated toughened glass and production process thereof | |
| CN111470100B (en) | Steel drum film covering machine set and using method | |
| CN210846902U (en) | Automatic spraying device for inner wall of bent pipe | |
| CN114192321A (en) | Curtain coating device and process of heat-insulating flame-retardant coating for PC (polycarbonate) plate | |
| KR100336991B1 (en) | Equipment and painting method of in line manufacturing process for steel pipe | |
| CN206474784U (en) | The equipment that connector removes solder mechanism except solder mechanism and with connector | |
| CN223010931U (en) | A coating equipment for automobile parts manufacturing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |