CN112589683A - Method for pretreating surface of rail transit wagon door - Google Patents
Method for pretreating surface of rail transit wagon door Download PDFInfo
- Publication number
- CN112589683A CN112589683A CN202011400948.8A CN202011400948A CN112589683A CN 112589683 A CN112589683 A CN 112589683A CN 202011400948 A CN202011400948 A CN 202011400948A CN 112589683 A CN112589683 A CN 112589683A
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- Prior art keywords
- shot blasting
- chamber
- shot
- workpiece
- rail transit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
- B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
- B24C3/14—Apparatus using impellers
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- 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
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
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- 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
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- 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
- B05D3/0413—Heating with air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
- B24C3/083—Transfer or feeding devices; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/003—Removing abrasive powder out of the blasting machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
Abstract
The invention discloses a method for pretreating the surface of a rail transit wagon door. The method comprises the following steps: conveying the workpiece; the workpiece conveying system sequentially conveys the workpieces to be processed into a shot blasting chamber, a paint spraying chamber, a drying chamber and a dust removal chamber; step two: shot blasting cleaning; the shot blasting device performs shot blasting treatment on the workpiece entering the shot blasting chamber, and the treated shot enters two sides of the shot blasting chamber body and flows into the sand sliding hopper along the shot blasting chamber body; the shot materials in the sand sliding hopper are conveyed to a top transverse screw through a bucket elevator, and then are cleaned through a cleaner and enter a shot blasting machine through a fan-shaped distribution valve; step three: painting; an automatic spray gun in the spray booth sprays paint on the upper surface and the lower surface of the workpiece subjected to shot blasting cleaning simultaneously; step four: drying; and the drying chamber is used for drying the painted workpiece. The invention has the advantages of carrying out shot blasting and rust removing treatment on the surface of the door of the rail transit railway wagon, and ensuring the installation precision and the use effect of the door of the rail transit railway wagon.
Description
Technical Field
The invention relates to a method for pretreating the surface of a rail transit wagon door.
Background
The door of the rail transit railway wagon is easy to rust when exposed in the air before use, the size of the door of the rail transit railway wagon after rusting is greatly different from that before rusting, the installation precision and the use effect of the door of the rail transit railway wagon are influenced, and meanwhile, the appearance of the door of the rail transit railway wagon is influenced by rusting. Therefore, it is necessary to remove rust from the doors of rail transit railway freight cars before use.
Disclosure of Invention
The invention aims to provide a method for pretreating the surface of a rail transit wagon door, which is used for performing shot blasting and rust removal treatment on the surface of the rail transit wagon door so as to ensure the installation precision and the use effect of the rail transit wagon door; and meanwhile, the surface of the door of the rail transit railway wagon is strengthened, and the door is prevented from rusting.
In order to achieve the purpose, the technical scheme of the invention is as follows: the rail transit wagon door surface pretreatment method is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
the method comprises the following steps: conveying the workpiece;
the workpiece conveying system sequentially conveys the workpieces to be processed into a shot blasting chamber, a paint spraying chamber, a drying chamber and a dust removal chamber; the shot blasting cleaning chamber comprises a shot blasting chamber and a cleaning chamber;
step two: shot blasting cleaning;
starting a dust removal system before and after opening the shot blasting chamber and the cleaning chamber; the dust removal system sucks out dust in the shot blasting chamber and the cleaning chamber through an air suction pipeline, then the dust is settled through a pre-separator A7, and the dust is filtered and finally the waste gas is discharged in high altitude;
the detection device controls the opening and closing time and the starting number of the shot blasting devices according to the width and the conveying speed of the workpiece;
the charging hopper supplies shots to the shot blasting device, the shot blasting device performs shot blasting treatment on the workpieces entering the shot blasting chamber, and the treated shots enter two sides of the shot blasting chamber body and flow into the sand sliding hopper along the shot blasting chamber body; the shot materials in the sand sliding hopper are conveyed to a top transverse screw through a bucket elevator, and then are cleaned through a cleaner and enter a shot blasting machine through a fan-shaped distribution valve; the shot blasting machines are divided into an upper layer and a lower layer, and the shot blasting machines on the upper layer and the shot blasting machines on the lower layer are arranged on different sections and are arranged in a staggered manner;
the cleaning chamber cleans the shot materials on the shot-blasted workpiece, so that the upper surface of the output workpiece has no residual shot materials and dust;
step three: painting;
an automatic spray gun in the spray booth sprays paint on the upper surface and the lower surface of the workpiece subjected to shot blasting cleaning simultaneously;
step four: drying;
and the drying chamber is used for drying the painted workpiece.
In the technical scheme, in the second step, the detection device is arranged at the inlet of the shot blasting chamber; the detection device has a plurality of sets.
In the technical scheme, in the second step, when the width of the workpiece is less than 1 m, the workpiece enters the shot blasting chamber close to one side of the shot blasting chamber body, and at the moment, the fan-shaped valves of the pair of shot blasting devices are opened;
when the width of the workpiece is more than 1 meter and less than 2 meters, the workpiece enters the shot blasting chamber close to the other side of the shot blasting chamber body, and the workpiece presses down the other group of detection devices; at the moment, the fan-shaped valves of the two pairs of impeller heads are opened;
when the width of the workpiece is more than 2 meters or the section steel is processed, pressing down two sets of detection devices; at the moment, all the sector valves of the three pairs of impeller heads are opened, and the six impeller heads work simultaneously.
In the technical scheme, in the second step, the dust concentration in the waste gas discharged by the dust removal system is less than 80mg/m3；
After being treated by the dust removal system, the dust concentration in the shot blasting chamber and the cleaning chamber is less than 10mg/m3。
In the technical scheme, the bucket elevator is arranged outside the cleaning chamber.
In the above technical scheme, in the second step, the shot materials for performing shot blasting on the workpiece are cast steel shots and steel wire cut shots.
In the technical scheme, the shot materials are 0.8mm cast steel shots and steel wire cut shots; wherein, when the shot material is added into the shot blasting device for the first time, the ratio of the cast steel shot to the steel wire cut shot in the shot material is 1: 1.
In the above technical scheme, in the fourth step, the drying chamber comprises a drying chamber body, a circulating fan, a filter box and a heater; the heater, the circulating fan, the filter box and the drying chamber body are sequentially connected; and the drying chamber body is connected with the heater through an air supply pipe.
In the technical scheme, the paint spraying room comprises an exhaust system, a paint spraying room body, a paint spraying system, a spray gun motion system and a paint supply system; the exhaust system is arranged at the upper end of the paint spraying chamber body; the spray gun motion system is arranged in the spray chamber body; the paint supply system is connected with the paint spraying system; the paint spraying system is connected with the spray gun moving system.
The invention has the following advantages:
(1) the invention can carry out shot blasting and rust removing treatment on the surface of the door of the rail transit wagon, and has certain strengthening effect on the surface of the door of the rail transit wagon; the invention can also be used for carrying out shot blasting rust removal on the surfaces of other steel plates and door plates and strengthening the surfaces of the steel plates and the door plates;
(2) the workpiece conveying system continuously conveys workpieces, the shot blasting cleaning chamber continuously performs shot blasting and cleaning on the workpieces, the automatic paint spraying chamber automatically sprays paint on the workpieces after shot blasting, the drying chamber continuously dries the painted workpieces entering the drying chamber, and all the systems continuously work in sequence, so that the workpieces (namely rail transit wagon doors) are continuously and stably subjected to shot blasting and rust removal and strengthening, the rust removal and strengthening effects of the workpieces are ensured, and the treatment efficiency of the workpieces is improved;
(3) the workpiece conveying system, the shot blasting cleaning chamber, the automatic paint spraying chamber, the drying chamber and the like are provided with the observation windows and the emergency stop buttons, so that the operation condition of each section can be monitored conveniently, and the safety of maintainers and the timely shutdown of the system when problems occur are ensured.
Drawings
Fig. 1 is a schematic front view of a shot blasting cleaning chamber according to the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a front view schematically showing the structure of the spray booth of the present invention.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a left side view of fig. 3.
Fig. 6 is a front view of a drying chamber in the present invention.
Fig. 7 is a top view of fig. 6.
Fig. 8 is a left side view of fig. 6.
Fig. 9 is a partial perspective view of the bucket elevator of the present invention.
Fig. 10 is a schematic structural view of a roller way of the shot blasting chamber in the invention.
Fig. 11 is a schematic view of a feeding roller path structure in the workpiece conveying system according to the present invention.
Fig. 12 is a schematic view of a blanking roller way structure in the workpiece conveying system according to the present invention.
In the figure, A-shot blasting cleaning chamber, A1-isolation chamber, A1.1-rubber curtain suspension, A2-shot blasting chamber, A2.1-shot blasting chamber body, A2.11-shot blasting chamber upper body, A2.12-shot blasting chamber lower body, A2.2-shot blasting chamber door, A3-cleaning chamber, A3.1-shot blasting chamber upper body, A3.2-shot blasting chamber lower body, A4-shot circulating system, A4.1-sand slide hopper, A4.2-bucket elevator, 4.21-top lifting cover plate, 4.22-upper wheel, 4.23-upper shaft, 4.24-hopper, 4.25-lower wheel, 4.26-lower shaft, 4.27-bucket elevator belt, 4.28-shot lifting speed reducer, A4.3-top horizontal spiral, A4.4-shot cleaner, A4.41-wind power roller way structure, A5-sorting chamber, A6-shot blasting chamber, A6.6-shot blasting chamber A6-shot blasting machine, A2-shot blasting machine, second shot blasting chamber door, A3-upper wheel, a6.3-a third impeller head, A6.4-a fourth impeller head, A7-a pre-separator, A8-a loading hopper, A9-an air suction pipeline, A10-a ladder, A11-an upper platform, A12-a guardrail, A13-a guard board, A14-a pill collecting hopper, B-a spray booth, B1-an exhaust system, B2-a spray booth body, B3-a spray painting system, B3.1-an automatic spray head, B4-a lampshade, B5-a lamp, B6-a spray gun motion system, B6.1-a trolley, B6.2-a drag chain, B6.3-a trolley drive, B7-a paint supply system, B8-a cover plate system, B9-a spray painting roller table, B10-a grid floor, B11-a filter system, C-a drying booth, C1-a heat preservation booth body, C36 2-a ladder, C3-a hose, C4-a circulating fan, c5-elbow, C6-filter box, C7-heater, C8-blast pipe, C9-axial conveying chain, C10-driving chain wheel shaft component, C11-cycloidal pin wheel speed reducer, C12-outer layer heat insulation board, C13-cycloidal pin wheel speed reducer, C14-driven chain wheel shaft component, C15-joist component, D-dedusting system and E-workpiece conveying system.
In fig. 1, AA denotes an electric cabinet; and AB indicates the line of the hopper supplying shots to the impeller.
In fig. 2, shot blasting machine A6 includes a first shot blasting machine a6.1, a second shot blasting machine a6.2, a third shot blasting machine a6.3, and a fourth shot blasting machine a 6.4; the first impeller A6.1, the second impeller A6.2, the third impeller A6.3 and the fourth impeller A6.4 are arranged on different sections and are arranged in a staggered manner; the first impeller A6.1 and the third impeller A6.3 are ejected in a left-handed manner, and the second impeller A6.2 and the fourth impeller A6.4 are ejected in a right-handed manner.
G in fig. 2 represents a workpiece to be polished; the polishing workpiece G is positioned on a shot blasting chamber roller way A5, is positioned between the first shot blasting machine A6.1 and the third shot blasting machine A6.3, and is positioned between the second shot blasting machine A6.2 and the fourth shot blasting machine A6.4.
In fig. 3, BD indicates the smoke discharge direction of the exhaust system.
In fig. 4, BA denotes an air supply system; BB denotes the air supply direction of the air supply system; BC denotes the paint supply direction of the paint supply system; and BD represents an electric control cabinet.
In fig. 5, BA denotes the direction in which the workpiece enters the paint spray booth.
In fig. 8, L denotes a chain.
In fig. 10, a denotes a chain; b represents a sizing roller; c represents a cycloidal-pin gear reducer; h denotes shot blast chamber rollers.
In fig. 11, a denotes a roller of the charging roller table; b represents a chain; and C represents a cycloidal pin gear reducer.
In fig. 12, a denotes a cycloidal-pin gear reducer; b represents a chain; c represents a roller of a blanking roller way.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.
With reference to the accompanying drawings: the surface pretreatment method of the rail transit wagon door comprises the following steps,
the method comprises the following steps: conveying the workpiece;
the workpiece conveying system sequentially conveys the workpieces to be processed into a shot blasting cleaning chamber A, a paint spraying chamber B, a drying chamber C and a dust removal system D; the shot blasting cleaning chamber A comprises a shot blasting chamber A2 and a cleaning chamber A3;
step two: shot blasting cleaning;
starting a dust removal system D before and after opening the shot blasting chamber and the cleaning chamber A; the dust removal system D sucks dust in the shot blasting chamber A2 and the cleaning chamber A3 through an air suction pipeline A9, and then the dust is settled by the pre-separator 5, filtered and finally discharged at high altitude;
the detection device controls the opening and closing time and the starting number of the shot blasting devices A6 according to the width and the conveying speed of the workpiece;
the loading hopper A8 supplies shots to the shot blasting machine A6, the shot blasting machine A6 performs shot blasting treatment on the workpieces entering the shot blasting chamber A2, and the treated shots enter two sides of a shot blasting chamber body A2.1 and flow into the sand sliding hopper A4.1 along the shot blasting chamber body A2.1 through the shot collecting hopper A14; the shot in the sand sliding hopper A4.1 is conveyed to a top transverse screw A4.3 through a bucket elevator A4.2, is cleaned through a shot cleaner A4.4 and then is fed to a shot blasting device A6 through a feeding hopper A8; a sand sliding hopper A4.1, a bucket elevator A4.2, a top transverse screw A4.3, a pill material cleaner A4.4 (a pill dust separation device and a pill storage hopper), a feeding hopper A8 and a shot blasting device A6 form a pill material circulating system;
the pill cleaner A4.4 combines screen separation and wind separation, when pills slide down along an inclined plate of an upper horizontal spiral section in the pill cleaner A4.4 to form a waterfall shape, the adsorption effect of transverse airflow is utilized, fine dust in the pills is taken away by air, the pills enter a pill collecting hopper and filter parts and impurities in the pills through screens, and two layers of screens are adopted to complete separation and purification in order to clean the impurities; the fine abrasive particles separated from the pellet cleaner flow out of the lower connecting pipe and are discharged into a waste hopper. In order to ensure the sorting quality, the pill cleaner A4.4 is provided with an air quantity regulating gate and an air quantity regulating baffle.
The bucket elevator A4.2 is of a centrifugal discharging type structure, and a speed measuring device is arranged on a driven wheel of the bucket elevator A4.2; when the bucket elevator cannot work normally due to the breakage or the slippage of the belt, the bucket elevator can automatically stop supplying pills to the shot blasting device A6; the bucket elevator A4.2 is driven by a bucket elevator driving device, and the bucket elevator driving device is provided with a backstop mechanism for preventing the bucket elevator from reversing due to power failure and other reasons; the belt thickness of the bucket elevator A4.2 is 10mm, the lower part of the elevator bucket is provided with an inspection hole, the top of the elevator bucket is provided with an inspection platform and an observation hole; the sand discharge pipe is made of a seamless steel pipe with the wall thickness of 8 mm.
The bucket elevator A4.2 comprises a bucket elevator top cover plate A4.21, an upper wheel A4.22, an upper shaft A4.23, a shell, a bucket elevator belt A4.27, a lower wheel A4.25, a lower shaft A4.26, a bucket elevator speed reducer A4.28, a bucket elevator driving chain wheel, a chain and a bucket elevator driven chain wheel;
the shell is of a hollow structure; the upper end of the shell is provided with a bucket lifting top cover plate A4.21, and the lower part of the shell is provided with a bucket lifting plugboard;
the upper wheel A4.22 and the lower wheel A4.25 are both arranged in the shell; wherein, the upper wheel A4.22 is positioned at the upper part of the shell, and the lower wheel A4.25 is positioned at the lower part of the shell; the upper wheel A4.22 is connected with the lower wheel A4.25 through a belt A4.27 for the bucket elevator; the hopper A4.24 is arranged on the belt A4.27 for the bucket elevator and is positioned in the shell;
the sand sliding hopper A4.1 is positioned below the shell side;
the bucket elevator speed reducer A4.28 is positioned outside the shell; the bucket lifting speed reducer A4.28 is connected with a bucket lifting driving chain wheel, and the bucket lifting driving chain wheel is connected with a bucket lifting driven chain wheel through a chain; the bucket lifting driven chain wheel is arranged on the upper shaft A4.23; the upper shaft A4.23 is connected with an upper wheel A4.22, and the lower wheel A4.25 is connected with a lower shaft A4.26.
A plurality of hoppers A4.24 are provided; a plurality of hoppers A4.24 are arranged on the belt A4.27 for the bucket elevator at intervals; the shot materials in the sand sliding hopper A4.1 are continuously conveyed to the shot blasting machine through the plurality of hoppers A4.24 to perform shot blasting operation on the workpiece, so that the working efficiency is high, and the time and the labor are saved.
The pill collecting bucket A14 is connected with the sand sliding bucket A4.1.
A branch air pipe system is arranged in the pill material cleaner A4.4; the branch air pipe system comprises a plurality of branch air pipes; the branch air pipe is formed by rolling a steel plate with the thickness of 3 mm; the branch air pipes are connected through flanges, and the joints are sealed through flame-retardant sealing tapes, so that dust is prevented from escaping;
the shot blasting machines A6 are provided with a plurality of shot blasting machines A6 which are arranged up and down; the impeller head A6 positioned on the upper layer and the impeller head A6 positioned on the lower layer are arranged on different sections and are arranged in a staggered manner;
the cleaning chamber A3 cleans the shot materials on the shot-blasted workpiece, so that the upper surface of the output workpiece has no residual shot materials and dust;
step three: painting;
an automatic spray gun B3.1 arranged in the spray booth B simultaneously sprays paint on the upper surface and the lower surface of the workpiece after shot blasting cleaning;
step four: drying;
and the drying chamber C is used for drying the workpiece after paint spraying.
Further, in the second step, the detection device is arranged at the inlet of the shot blasting chamber A2; the detection device has a plurality of sets; two detection devices are arranged at an inlet of a shot blasting chamber A2, and the detection devices can control the opening time and the opening number of a shot blasting machine A6 and shot valves (namely fan-shaped valves) thereof by combining with a speed measuring mechanism according to the width of a processed workpiece; when the width of the steel plate to be processed is less than 1 meter, the workpiece enters a shot blasting chamber A2 close to one side of a shot blasting chamber body A2.1, and only a fan-shaped valve of a pair of shot blasting machines A6 (namely one shot blasting machine A6 positioned above the workpiece and one shot blasting machine A6 positioned below the workpiece) is opened; when the width of the workpiece is more than 1 meter and less than 2 meters, the workpiece enters a shot blasting chamber A2 close to the other side of a shot blasting chamber A2.1, the workpiece presses down another group of detection devices, sector valves of two pairs of shot blasting devices A6 (namely two shot blasting devices A6 positioned above the workpiece and two shot blasting devices A6 positioned below the workpiece) are opened simultaneously, and four shot blasting devices A6 work up and down; when the width of the steel plate is more than 2 meters or profile steel is processed, the workpiece presses down two sets of detection devices, all fan-shaped valves of three pairs of impeller heads A6 (namely three impeller heads A6 positioned above the workpiece and three impeller heads A6 positioned below the workpiece) are opened, and six impeller heads A6 work simultaneously; in order to prevent the shots of the shot blasting device A6 from colliding with each other to influence the shot blasting efficiency and prevent the shot blasting device from wearing too fast caused by shot blasting, the upper shot blasting device and the lower shot blasting device are arranged on different cross sections and staggered at an angle with each other, so that the shot blasting efficiency is improved, the wearing is reduced, the service life of the equipment is greatly prolonged, the maintenance workload is reduced, the downtime caused by maintenance is shortened, the efficiency of the equipment is improved, and the maintenance cost is reduced.
A spiral groove, a nylon rotary brush and a high-pressure blowpipe are arranged in the cleaning chamber A3; after shot blasting, the shot on the workpiece is swept into the groove screw by the nylon rotary brush, the shot is conveyed to two sides of the shot blasting chamber body by the groove screw, and the shot flows into the lower sand slide along the shot blasting chamber body; blowing the workpiece through high-pressure air of the high-pressure air blowing pipe to ensure that no steel shot and dust remain on the upper surface of the output workpiece; the nylon is revolved the promotion of brush and groove spiral and is adopted the worm gear reduction unit, utilizes the auto-lock performance of worm gear reduction unit to adjust the nylon and revolves the height of brush and groove spiral, and is convenient, swift, reliable.
The nylon rotary brush is of a combined structure and comprises brush filaments and a brush seat; the bending strength of the brush filaments is greater than or equal to 780kg/cm2(ii) a Tensile strength of 500kg/cm or more2(ii) a Unnotched impact strength of 100kg/cm or more2(ii) a The product can be used for a long time at the temperature of below 80 ℃, can not become brittle at the temperature of minus 60 ℃, and can be used for a short time at an adaptive temperature of 120 ℃; the brush seat is made of aluminum alloy which is cast by a metal mold under pressure, has no casting defects such as air holes and cracks, and is high in strength and durable.
Further, in the second step, the dust removal system D comprises a pre-separator a7, a filter cartridge type dust remover, a centrifugal fan, an air suction pipeline a9 and a dust exhaust chimney; when the dust removal system D works, indoor dust is sucked out through air suction ports of the shot blasting chamber A2 and the cleaning chamber A3 through an air suction pipeline A9, then is settled through a preseparator A7, then is filtered through a filter cartridge type dust remover, and finally, waste gas is discharged in high altitude; the dust concentration in the waste gas discharged by the dust removal system D is less than 80mg/m3；
After being processed by a dust removal system DThe dust concentration in the shot blasting chamber A2 and the cleaning chamber A3 is less than 10mg/m3(ii) a Negative pressure devices are arranged in the shot blasting chamber A2 and the cleaning chamber A3, so that certain negative pressure is ensured in the shot blasting chamber and the cleaning chamber, and dust is prevented from escaping;
before the impeller head A6 is started and the shot materials are added each time, the dust removal system D is started firstly; when the shot blasting machine is stopped every time, the dust removal system D continues to operate for a period of time, and dust in the shot blasting chamber and the cleaning chamber is thoroughly removed;
the cleaning mode of the filter cartridge type dust remover is the compressed air back blowing, and the frequency of the compressed air back blowing is controlled by the pulse controller, so that the dust removing effect is ensured.
Further, the bucket elevator A4.2 is installed outside the cleaning chamber A3, moving parts and bearings are completely isolated from steel shots and dust, and the problem that a moving mechanism is blocked is thoroughly solved.
Further, in the second step, shot materials for performing shot blasting treatment on the workpiece are cast steel shots and steel wire cut shots;
the shot blasting chamber comprises a shot blasting chamber body, an isolation chamber, a cleaning chamber, a shot circulating system and an air suction pipeline A9;
four impeller heads are arranged in the impeller blasting chamber body, and two impeller heads are arranged at the upper part and the lower part;
the shot blasting chamber body adopts a plate welding three-layer structure, namely: a housing, a backing strip, and a guard plate; the shell adopts high Cr cast iron with the thickness of 12mm as a protective plate (the hardness is more than HRC 60), and the abrasion plate is fixed on the shot blasting chamber body by a protective plate nut to protect the whole shot blasting chamber body; the shot blasting chamber door adopts a lap joint type sealing mode, when the shot blasting chamber body protective plate is laid, the protective plate extends to the door and window opening by about 50mm, and steel shots are prevented from leaking from the door seam; the impeller head is the prior art.
The isolation chamber comprises a front isolation chamber and a middle isolation chamber, and wear-resistant rubber curtains are hung in the front isolation chamber and the middle isolation chamber respectively to prevent shot materials from splashing and dust from escaping; the rubber curtain is hung and welded on the hook of the isolation chamber body, and is easy to detach and replace.
A plurality of access doors are arranged in the shot blasting chamber A2; each access door is provided with a safety protection limit switch and an emergency stop button for ensuring the safety of the maintainers and timely shutting down when problems occur.
A step A10 is arranged outside the shot blasting chamber A2; the landing A10 is an inclined ladder, which is divided into an upper layer and a lower layer; the step A10 on the lower layer is arranged outside the lower body A2.12 of the shot blasting chamber, and the step A10 on the upper layer is arranged outside the upper body A2.11 of the shot blasting chamber; the shot blasting chamber upper body 2.11 can be conveniently reached through the ladder A10 positioned on the lower layer, and then the upper platform A11 of the shot blasting chamber A2 can be conveniently reached from the shot blasting chamber upper body 2.11 through the ladder A10 positioned on the upper layer, so that the tool is convenient to carry and overhaul.
Furthermore, the shot materials are generally selected from cast steel shots and steel wire cut shots with the size of about 0.8 mm; when the shot material is added into the shot blasting device for the first time, the ratio of cast steel shots to steel wire cut shots in the shot material is 1:1, so that the steel shots are ensured to have good fluidity; after a period of use, the cast steel shots are consumed and the cut steel wire shots are rounded, and when the cast steel shots are added, the rounded cut steel wire shots are directly added.
Further, in the fourth step, the drying chamber C is of a closed circulating structure, and includes a drying chamber body C1, a circulating fan C4, a heater C7, a filter box C6, a connecting hose, a filter box and a blast pipe; the heater C7, the circulating fan C4, the filter box C6 and the drying chamber body C1 are connected in sequence; and the drying chamber body C1 is connected to the heater C7 through the blast pipe C8.
A ladder-shaped pipe is arranged between the heater C7 and the circulating fan C4; the trapezoid pipe C2 is connected with the circulating fan C4 through a connecting hose; the circulating fan C4 is connected with the filter box C6 through an elbow C5, and the filter box C6 is connected with the drying chamber body C1 through a connecting pipe fitting;
the drying chamber body C1 adopts a light steel structure as a frame, the outer-layer heat-insulation board of the drying chamber body C1 adopts a double-sided colored rock wool sandwich board, the outer layer of the sandwich board is a 0.5mm blue colored steel plate, the inner-layer colored plate is 0.5mm, and delta 75mm aluminum silicate fiber is sandwiched in the middle of the sandwich board to serve as a heat-insulation layer;
the circulating fan C4 adopts a low-noise multi-wing centrifugal fan, and has the characteristics of high temperature resistance, low noise, small vibration and the like;
a heating controller is arranged in the drying chamber C; the heating controller comprises a full-automatic thermal resistor and a heater controller; the heating controller adjusts the heater according to the input signal of the full-automatic thermal resistor, so that the aim of controlling the temperature in the drying chamber C is fulfilled.
Further, the workpiece conveying system is driven by a motor and is subjected to variable-frequency segmented speed regulation;
the workpiece conveying system comprises an input roller way (namely a feeding roller way), a shot blasting chamber roller way, a middle roller way, a drying chamber conveying mechanism and an output roller way (namely a discharging roller way); the input roller way, the shot blasting chamber roller way, the middle roller way, the drying chamber conveying mechanism and the output roller way are conveying roller ways, and the input roller way, the shot blasting chamber roller way, the middle roller way, the drying chamber conveying mechanism and the output roller way are connected in sequence. The rollers of the input roller way, the middle roller way and the output roller way are all made of high-strength sleeves, and the roller table has the characteristics of impact resistance and high outer diameter size precision; the roller bearings of the run-in roller way, the middle roller way and the run-out roller way adopt high-quality self-aligning bearings with seats, so that the installation and the disassembly are convenient, and the maintenance is convenient (as shown in figures 10, 11 and 12). The distance between roller ways of the shot blasting chamber is reasonably designed, the direct throwing of steel shots is completely avoided, the secondary rebounding blasting of the shots is reduced to the maximum extent, and the internal maintenance is convenient (as shown in figure 10). In the invention, the roller ways of the shot blasting chamber are protected by a sheath made of high Cr cast iron, for sealing, the roller way holes of the shot blasting chamber are sealed by an inner connecting plate and an outer connecting plate, the inner plate is welded on the body of the shot blasting chamber, and the outer plate is connected with the inner plate through bolts; the self-aligning bearing with the seat adopts a vertical bearing, and is installed on the bearing seat frame after leaving the shot blasting chamber body, so that even if dust passes through the protection device, the dust cannot enter the self-aligning bearing with the seat to abrade the bearing, thereby protecting the bearing and preventing the bearing from being abraded to the maximum extent.
End part sheaths are arranged at two ends of a roller way of the shot blasting chamber and used for protecting a shaft head; according to the invention, the sand blocking sheath is arranged at the shaft end of the roller, so that the shaft head is protected, and the sand blocking sheath and the end part sheath form a closed-loop protection, thereby preventing steel shots from flying out of a shot blasting chamber body from the shaft hole and ensuring that the steel shots cannot hit the shaft head at any time (as shown in figures 10, 11 and 12).
The middle roller way is a middle transition roller way and is positioned between the shot blasting chamber and the paint spraying machine, and the steel plate and the section bar after shot blasting cleaning are checked for derusting effect on the middle roller way.
The drying chamber C adopts international standard conveying chain transmission, and the drying chamber conveying mechanism adopts a drying chamber conveying roller; the drying chamber conveying rollers are fixed on the conveying chains on two sides of the drying chamber body and move along with the conveying chains; the conveying chain runs on guide rails on two sides of the drying chamber body, and the pitch of the chain is 125 mm; the diameter of a roller of the drying chamber conveying roller is 36cm, a carrier roller is arranged at intervals of 300mm, and the carrier roller is formed by assembling and welding seamless steel pipes with the outer diameter of 60mm and the wall thickness of 10mm and angle steel; the structure has good rigidity, strong bearing capacity, tensile resistance, difficult deformation and difficult bending; the angle steel on the carrier roller forms an inverted V-shaped structure, the painted workpiece and the carrier roller form line contact and are conveyed in parallel, and the carrier roller and the workpiece do not move relatively, so that the damage of a paint film on the surface of the workpiece is reduced to the minimum.
The middle roller way and the roller way of the shot blasting chamber share one set of driving motor, and the input roller way, the drying chamber conveying mechanism and the output roller way are provided with independent driving motors; the conveying roller ways can be linked and independently moved, and the speed is regulated in a full-line stepless manner; when the device normally works, the full-line roller ways are linked and stepless speed regulation is realized through frequency conversion; when the manual control is carried out, each section of roller way can be controlled respectively, so that the adjustment and the maintenance of the roller ways are convenient; when the conveying roller way is automatically controlled and manually controlled, the speed of the conveying roller way can be directly adjusted and observed on the main control table.
Further, the paint spray booth B includes an exhaust system B1, a paint spray booth body B2, a paint spray system B3, a spray gun movement system B6, a paint supply system B7, and a filter system B11; the exhaust system B1 is arranged at the upper end of the paint spraying chamber body B2; the spray gun motion system B6 is arranged in the spray booth body B2; the paint supply system B7 is connected with the paint spraying system B3; the paint spraying system B3 is connected with a spray gun moving system B6, and an automatic spray gun B3.1 in the paint spraying system B3 is used for spraying paint to the upper and lower surfaces of the workpiece.
The spray gun motion system B6 comprises a trolley B6.1, a drag chain B6.2 and a spray gun power drive B6.3; the power of the spray gun drives B6.3 to drive the trolley B6.1 to move through a drag chain B6.2.
The paint spraying chamber body B2 is formed by profiling a square steel pipe and a steel plate, and has beautiful appearance and durability; the paint spraying chamber B body is provided with an observation and maintenance door; the paint spraying chamber body is of an open structure, and all parts and places needing maintenance which are arranged in the paint spraying chamber body can be maintained outside by opening doors;
the paint spraying system B3 comprises a high-pressure airless paint spraying pump, an automatic spray gun, a pneumatic stirrer, a paint filter and a connecting pipeline;
an automatic detection device is arranged at the front end of the paint spraying chamber body and is used for detecting incoming materials; the workpieces (steel materials) are continuously conveyed forwards, and an upper automatic spray gun and a lower automatic spray gun which are arranged on a trolley of a spray gun motion system are driven by a chain and are used for spraying the upper surface and the lower surface of the workpieces (steel plates) in a reciprocating way; when the upper automatic spray gun and the lower automatic spray gun move to the outside of two ends of the workpiece or the workpiece is conveyed, the automatic spray guns automatically stop spraying, so that the waste of paint can be reduced, the cleanness in the paint spraying chamber B is kept, and the spraying quality is ensured.
Furthermore, a shot supply system for supplying the shot to the shot blasting device A6 is provided with a plurality of control gates, so that the shot supply amount can be conveniently adjusted, and the shot supply amount of each throwing head is ensured to be consistent.
Other parts not described belong to the prior art.
Claims (9)
1. The rail transit wagon door surface pretreatment method is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
the method comprises the following steps: conveying the workpiece;
the workpiece conveying system (D) sequentially conveys the workpieces to be processed into a shot blasting cleaning chamber (A), a paint spraying chamber (B) and a drying chamber (C); wherein the shot blasting cleaning chamber (A) comprises a shot blasting chamber (A2) and a cleaning chamber (A3);
step two: shot blasting cleaning;
starting a dust removal system (D) before and after the shot blasting cleaning chamber (A) is opened; the dust removal system (D) sucks dust in the shot blasting cleaning chamber (A) out through an air suction pipeline (A9), and then the dust is settled through a pre-separator (A7), filtered and finally discharged at high altitude;
the detection device controls the opening and closing time and the starting number of the shot blasting devices (A6) according to the width and the conveying speed of the workpiece;
the charging hopper (A8) supplies shots to the shot blasting machine (A6), the shot blasting machine (A6) performs shot blasting treatment on the workpieces entering the shot blasting chamber (A2), and the treated shots enter two sides of the shot blasting chamber (A2) and flow into the sand sliding hopper along the shot blasting chamber (A2); the shot materials in the sand sliding hopper (A4.1) are conveyed to a top transverse screw (A4.3) through a bucket elevator (A4.2), and then are cleaned by a cleaner and then enter a shot blasting machine (A6) through a sector distribution valve; the shot blasting machines (A6) are provided with a plurality of shot blasting machines (A6) which are arranged in an upper layer and a lower layer, and the shot blasting machine (A6) positioned on the upper layer and the shot blasting machine (A6) positioned on the lower layer are arranged on different sections and are arranged in a staggered manner;
the cleaning chamber (A3) cleans the shot materials on the shot-blasted workpiece, so that the upper surface of the output workpiece has no residual shot materials and dust;
step three: painting;
an automatic spray gun in the spray booth (B) simultaneously sprays paint on the upper surface and the lower surface of the workpiece after shot blasting;
step four: drying;
and the drying chamber (C) is used for drying the workpiece after paint spraying.
2. The rail transit railway wagon door surface pretreatment method according to claim 1, wherein: in the second step, the detection device is arranged at the entrance of the shot blasting chamber; the detection device has a plurality of sets.
3. The rail transit railway wagon door surface pretreatment method as claimed in claim 2, wherein: in the second step, when the width of the workpiece is less than 1 meter, the workpiece enters the shot blasting chamber close to one side of the shot blasting chamber body (A2.1), and at the moment, the fan-shaped valves of a pair of shot blasting devices (A6) are opened;
when the width of the workpiece is more than 1 meter and less than 2 meters, the workpiece enters the shot blasting chamber (A2) close to the other side of the shot blasting chamber body (A2.1), and the workpiece presses down the other group of detection devices; at the moment, the sector valves of the two pairs of impeller heads (A6) are opened;
when the width of the workpiece is more than 2 meters or the section steel is processed, pressing down two sets of detection devices; at this time, all the sector valves of the three pairs of the blasting machines (A6) are opened, and six blasting machines (A6) work simultaneously.
4. A rail transit railway wagon door surface preparation as defined in claim 3The processing method is characterized by comprising the following steps: in the second step, the dust concentration in the waste gas discharged by the dust removal system D is less than 80mg/m3；
After being treated by the dust removal system (D), the dust concentration in the shot blasting chamber (A2) and the cleaning chamber (A3) is less than 10mg/m3。
5. The rail transit railway wagon door surface pretreatment method according to claim 4, wherein: the bucket elevator (A4.2) is installed outside the cleaning chamber (A3).
6. The rail transit railway wagon door surface pretreatment method according to claim 5, wherein: in the second step, the shot materials for shot blasting treatment of the workpiece are cast steel shots and steel wire cut shots.
7. The rail transit railway wagon door surface pretreatment method according to claim 6, wherein: the shot material is 0.8mm cast steel shot and steel wire cut shot; wherein, when the shot material is added into the shot blasting device (A6) for the first time, the ratio of cast steel shots to steel wire cut shots in the shot material is 1: 1.
8. The rail transit railway wagon door surface pretreatment method as claimed in claim 7, wherein: in the fourth step, the drying chamber (C) comprises a drying chamber body (C1), a circulating fan (C4), a heater (C7) and a filter box (C6); the heater (C7), the circulating fan (C4), the filter box (C6) and the drying chamber body (C1) are connected in sequence; and the drying chamber body (C1) is connected with the heater (C7) through the blast pipe (C8).
9. The rail transit railway wagon door surface pretreatment method according to claim 8, wherein: the paint spraying chamber (B) comprises an exhaust system (B1), a paint spraying chamber body (B2), a paint spraying system (B3), a spray gun moving system (B6) and a paint supply system (B7); the exhaust system (B1) is arranged at the upper end of the paint spraying chamber body (B2); the spray gun motion system (B6) is arranged in the spray booth body (B2); the paint supply system (B7) is connected with the paint spraying system (B3); the paint spraying system (B3) is connected with the spray gun moving system (B6).
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Cited By (1)
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| CN115445832A (en) * | 2022-08-31 | 2022-12-09 | 中车眉山车辆有限公司 | Spraying system for railway wagon |
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