CN111940204B - Automatic device and method for spraying inner wall of circular tube - Google Patents
Automatic device and method for spraying inner wall of circular tube Download PDFInfo
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- CN111940204B CN111940204B CN202010666056.6A CN202010666056A CN111940204B CN 111940204 B CN111940204 B CN 111940204B CN 202010666056 A CN202010666056 A CN 202010666056A CN 111940204 B CN111940204 B CN 111940204B
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- 238000001035 drying Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
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Classifications
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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
- 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
- B05B13/0654—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 a treating nozzles being translated through the hollow bodies in a direction essentially 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
- B05B16/00—Spray booths
- B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
-
- 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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- Spray Control Apparatus (AREA)
Abstract
The invention relates to the technical field of pipeline surface spraying equipment, and particularly provides a device and a method for spraying a coating on the inner wall of a single-section round pipe.
Description
Technical Field
The invention relates to the technical field of pipeline surface spraying equipment, and particularly provides a device and a method for spraying a coating on the inner wall of a single-section circular pipe.
Background
At present, conveying pipes in the field of sewage treatment plants and fire-fighting circular pipes are connected by a single large-diameter circular pipe with the length of 10-20 meters, and the problems of corrosion resistance, abrasion resistance, pollutant condensation on the pipe wall and the like can be solved by an inner coating (such as PU (polyurethane) coating, UV (ultraviolet) coating, paint, gum and the like) of the circular pipe, so that the service life of the circular pipe is effectively prolonged. At present, the method of spraying the coating is mostly adopted, technicians design some in-pipe traveling trolleys capable of traveling in a round pipe, the in-pipe traveling trolleys drive a spray gun to travel in the statically placed round pipe for spraying, and in the pipe with a circular cross section, the traveling speed of the traveling trolleys in the pipe and the like are difficult to accurately control, so that the problem of uneven spraying is easily caused. In the circular tube spraying, two ports of the circular tube are in an open state, and coating droplets generated in the spraying process are diffused in the air to cause environmental pollution, so that the spraying device is not beneficial to the health of an operator and causes coating waste. Meanwhile, after spraying, the coating is sprayed and dried in a static state, so that the problem that the non-dried coating flows and gathers easily occurs.
Disclosure of Invention
Aiming at the technical problem of spraying the coating on the inner wall of the circular tube, the invention provides an automatic device suitable for spraying the coating on the inner wall of the circular tube so as to improve the spraying quality and efficiency.
In order to achieve the above object, the present invention provides an automatic device for spraying the inner wall of a circular tube, comprising a rotary supporting unit, an end closing unit, a spraying unit and a drying unit.
The rotary supporting unit is used for driving circular pipes needing spraying to rotate in the circumferential direction and comprises a supporting roller set arranged on a base.
The tip seals the unit for the tip seal of spraying and stoving in-process pipe, including relative arrangement at base both ends and can transversely slide preceding activity pedestal and back activity pedestal, the upper end of preceding activity pedestal and back activity pedestal all is connected with the tip matched with port connecting piece with the pipe through rotary seal, and the upper end of preceding activity pedestal is provided with the horizontal through-hole of arranging with the axle center with the port connecting piece, preceding activity pedestal outside is provided with along the horizontal outside section of thick bamboo that holds that extends, hold the intercommunication of the horizontal through-hole of a section of thick bamboo and preceding activity pedestal upper end, it is provided with the switch part that is used for controlling to hold a section of thick bamboo front end and opens and shuts to hold near the front end of a section of thick bamboo, the back end plate that holds a section of thick bamboo is provided with horizontal central through-hole.
The spraying unit is used for spraying a coating on the inner wall of the circular tube and comprises a spraying head, a supporting tube, a moving trolley for driving the spraying head to move along the circular tube and a coating conveying pump for conveying the coating to the spraying head; the coating machine is characterized in that the movable trolley is arranged on the base and can move in a reciprocating mode in the transverse direction, the coating head is connected to the movable trolley through a supporting pipe which is movably penetrated through a central through hole of a rear end plate of the containing cylinder, and the coating delivery pump is connected with the coating head through the supporting pipe.
The drying unit is used for drying the coating on the inner wall of the circular tube and comprises an air conveying pump, an air heating component and an air filtering component, wherein the rear movable base body is connected with an air inlet tube, the front movable base body is connected with an air outlet tube, the discharge end of the air conveying pump is connected with the air inlet tube, the air heating component is arranged on the air inlet tube, and the air filtering component is arranged on the air outlet tube.
Optionally, the spraying unit further comprises a rotary driving mechanism for driving the spraying head to rotate circumferentially, and the output port of the coating material delivery pump is connected with the rear end of the support pipe in a rotary sealing manner.
Optionally, the rotary driving mechanism is disposed on the moving trolley, and includes a first gear, a second gear, and a rotary power component, the first gear is engaged with the second gear, the support tube is fixedly connected to the first gear, and the second gear is driven by the rotary power component.
Optionally, the rotary driving mechanism is arranged on the front movable base and comprises a transmission turntable, a third gear and a rotary power part, gear teeth meshed with the third gear are uniformly distributed on the outer circumference of the transmission turntable, the support tube penetrates through the transmission turntable and is matched with the central through hole of the transmission turntable in a circumferential fixed manner in an axially sliding manner, and the rotary power part drives the third gear to rotate.
Optionally, the spraying head includes a spraying shell with an inner cavity communicated with the support tube and nozzles circumferentially and uniformly distributed outside the spraying shell, and one end of the spraying shell, which is close to the support tube, circumferentially and uniformly distributed is provided with a plurality of universal support wheels for supporting the inner wall of the circular tube.
Optionally, the rear movable seat body is of a shell structure with an inner cavity, the inner cavity of the rear movable seat body is provided with an air heating part, and the output end of the air delivery pump is communicated with the inner cavity of the rear movable seat body.
Optionally, the exhaust end of the air delivery pump is connected with the air inlet pipe, and the intake end of the air delivery pump is connected with the air outlet pipe, so that hot air flowing through the circular pipe can be recycled, and the utilization efficiency of air heat is improved.
Further, the invention provides a spraying machine for spraying inner walls of a plurality of circular tubes simultaneously, which is characterized in that: the automatic device comprises a plurality of automatic devices for spraying the inner walls of the circular tubes which are longitudinally arranged in parallel, wherein each automatic device for spraying the inner walls of the circular tubes shares one set of drying unit, each drying unit comprises an air delivery pump, an air heating component and an air filtering component, and the rotary supporting unit, the end sealing unit and the spraying unit of each automatic device for spraying the inner walls of the circular tubes can independently act relative to the rotary supporting unit, the end sealing unit and the spraying unit of other automatic devices for spraying the inner walls of the circular tubes.
Meanwhile, the invention provides a method for spraying the inner wall of the circular tube, which comprises the following steps:
placing a circular tube on the supporting roller group along the transverse direction, wherein the front movable seat body and the rear movable seat body move inwards respectively, the port connecting piece of the front movable seat body seals the front end of the circular tube, and the port connecting piece of the rear movable seat body seals the rear end of the circular tube;
the movable trolley drives the spraying head to move to the rear end of the circular tube in the circular tube through the supporting tube;
the supporting roller group drives the circular tube to rotate in the circumferential direction, the movable trolley drives the spraying head to move towards the front end of the circular tube through the supporting tube, the coating conveying pump conveys coating to the spraying head, and the coating is sprayed out from the nozzle to spray the inner wall of the circular tube;
after the spraying is finished, the movable trolley drives the spraying head to enter the containing cylinder of the front movable seat body, and the switch part at the front end of the containing cylinder is closed;
the air flow passing through the air heating part is driven by the air conveying pump to pass through the inner cavity of the circular tube, and the circular tube is driven by the supporting roller group to rotate circumferentially to heat and dry the coating.
Optionally, the support roller group is set to be in a high-speed rotation state and a low-speed rotation state, and in the spraying process, the support roller group drives the circular tube to rotate at a high speed; in the drying process, the support roller group drives the round pipe to rotate at a low speed.
The technical advantages of the invention are mainly reflected in that:
1. the spraying device is provided with a front movable base body and a rear movable base body, the two ends of a round pipe in a rotating state are blocked, a moving trolley outside the round pipe drives a spraying head at the front end of a supporting pipe to axially move through a supporting pipe movably penetrating through the front movable base body, the rotating state of the round pipe and the moving speed of the spraying head are accurate, and a uniform coating can be formed; in the spraying process, the circular tube is in a closed state, so that the coating droplets are prevented from flying to the outside to cause environmental pollution in the spraying process.
2. Under the pipe end closed state, the air that drives the heating through the air delivery pump flows through in the pipe of rotation state and carries out the coating stoving, and the drying speed piece of coating, body rotate and prevent that the coating from flowing the problem emergence to be favorable to the homogeneity of drying, go out the tuber pipe and have set up the air filter component of filtering coating droplet, prevent that the coating droplet is discharged and cause environmental pollution.
3. The movable base body is provided with the containing cylinder, and in the drying process, the spraying head enters the containing cylinder and closes the switch component for containing the front end opening of the cylinder, so that the problem that the hot air in the drying process heats the spraying head to cause the drying and solidification of the coating at the position of the nozzle to block the nozzle is avoided, and the spraying head is convenient to use in the next spraying work.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
Fig. 1 is a schematic three-dimensional structure diagram of an automatic circular tube inner wall spraying device.
FIG. 2 is a system configuration diagram of an automatic circular tube inner wall coating apparatus.
Fig. 3, a schematic structural view of the front movable end cap.
Fig. 4 is a schematic view of the apparatus in a spray process.
Fig. 5 is a schematic view of the device in a drying process.
Fig. 6 is a schematic structural diagram of a first embodiment of a rotary drive mechanism of the spray head.
Fig. 7 is a schematic structural diagram of a second embodiment of a rotary drive mechanism of the spray head.
Fig. 8 is a schematic structural view of a coating machine for simultaneously coating the inner walls of a plurality of circular tubes.
Fig. 9 is an operation schematic diagram of the coating machine for simultaneously coating the inner walls of a plurality of circular tubes.
In the figure, 11-a base, 12-a support roller group, 21-a front movable base, 22-a rotary sealing part, 23-a port connecting piece, 24-a containing cylinder, 25-a switch component, 31-a rear movable base, 41-a spraying head, 411-a spraying shell, 412-a nozzle, 413-a universal supporting wheel, 42-a supporting tube, 43-a moving trolley, 44-a coating conveying pump, 45-a coating containing box, 51-an air conveying pump, 52-an air heating component, 53-an air filtering component, 54-a valve, 61-a first gear, 62-a second gear, 63-a transmission turntable, 64-a third gear and 7-a round tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic three-dimensional structure diagram of an automatic circular tube inner wall spraying device. FIG. 2 is a system configuration diagram of an automatic circular tube inner wall coating apparatus.
The invention provides an automatic device for spraying the inner wall of a round tube, which comprises a base 11, a rotary supporting unit arranged on the base 11, an end part sealing unit, a spraying unit and a drying unit.
The rotary supporting unit is used for supporting and circumferentially rotating the transversely placed round pipe 7 and comprises a plurality of supporting roller sets 12 which are longitudinally arranged on a base 11 at intervals, each supporting roller set 12 comprises supporting rollers which are longitudinally arranged at intervals and a rotary power part for driving the supporting rollers to rotate, and in some embodiments, a pressing roller set for pressing the pipe fitting to ensure that the pipe fitting is kept stable in a rotating state is arranged above the base.
The end part sealing unit is used for sealing the end part of the circular tube 7 in the spraying and drying processes and comprises a front movable seat body 21 and a rear movable seat body 31, transverse guide rails are respectively arranged at the front end and the rear end of the base 11 positioned at the supporting roller set 11, the front movable seat body 21 is arranged on the transverse guide rails at the front end of the supporting roller set in a sliding manner, and an air cylinder used for pushing the front movable seat body to slide is arranged between the base 11 and the front movable seat body 21; the rear movable seat body 31 is slidably arranged on a transverse guide rail at the rear end of the support roller group, and another cylinder for pushing the rear movable seat body 31 to slide is arranged between the base 11 and the rear movable seat body 31.
The spraying unit is used for spraying a coating on the inner wall of a round pipe and comprises a spraying head 41, a coating conveying pump 44, a coating containing box 45 and a moving trolley 43, wherein the input end of the coating conveying pump 44 is communicated with a nozzle 412 of the spraying head 41 through a supporting pipe 42. The rear end of the supporting roller group 12 on the base 11 is provided with a transverse guide rail, the moving trolley 43 is arranged outside the circular tube, wheels of the moving trolley 43 are arranged on the transverse guide rail in a crossing mode and driven by a motor to enable the moving trolley to move along the transverse rail, the supporting tube 42 is horizontally arranged along the transverse direction, the front end of the supporting tube 42 is fixedly connected with the spraying head 41, and the rear end of the supporting tube 42 is fixedly installed on the moving trolley 43.
The spraying head 41 comprises a spraying shell 411 body provided with an inner cavity and nozzles 412, the inner hole of the supporting pipe 42 is communicated with the inner cavity of the spraying shell 411, and the nozzles 412 communicated with the inner cavity are uniformly distributed on the periphery of the spraying shell 411. In some embodiments, a plurality of universal support wheels 413 are uniformly distributed on the circumference of the end of the spraying housing 411 close to the support tube 42, and when the spraying head 41 enters the circular tube 7, each universal support wheel 413 is supported on the inner wall of the circular tube 7.
In this embodiment, the paint delivery pump 44 is a jet pump, which belongs to a product commonly used in the industry and comprises a nozzle, a mixing chamber, an expansion pipe, etc., the jet pump uses compressed air as a power source, the compressed air is ejected from the nozzle at a high speed, and low pressure is formed in the vacuum chamber, so that the paint is sucked into the vacuum chamber and then enters the mixing chamber. The high-energy compressed air and the low-energy coating are fully mixed in the mixing chamber, so that the energy is mutually exchanged, the speed is gradually consistent, the mixture enters the diffusion chamber from the throat, the speed is slowed down, and the static pressure is increased again, so that the aim of conveying liquid is fulfilled, and the mixing chamber is suitable for various inflammable and explosive places and has an explosion-proof effect.
The jet pump utilizes the jet action of high-pressure working fluid to convey fluid, adjusts the input air pressure of the jet pump, can realize stepless speed regulation of the conveying capacity, and changes the thickness of the coating sprayed by the spraying head 41 under the condition that the circumferential rotating speed of the circular tube 7 and the advancing speed of the movable trolley 43 are not changed so as to meet the thickness requirements of different coatings.
The drying unit is used for drying the coating on the inner wall of the circular tube, and comprises an air conveying pump 51, an air heating component 52 and an air filtering component 53, wherein the air heating component 52 is arranged in an air inlet pipe, the air filtering component 53 is arranged in an air outlet pipe of the front movable seat body, the air conveying pump is connected with the air inlet pipe, the air conveying pump pumps external air into the air inlet pipe and heats the air through the air heating component 52, then the air enters the circular tube 7 through the front movable seat body 21, the coating which is newly sprayed on the inner surface of the circular tube 7 is heated and dried, and then the air is discharged from the air filtering component 53 of the air outlet pipe.
Fig. 3, a schematic structural view of the front movable end cap.
As shown in the figure, a port connector 23 is connected to the front end of the front movable seat body 21 through a rotary seal 22, so that the port connector 23 can rotate relative to the front movable seat body 21 to maintain a state of sealing engagement with the end of the circular pipe in a rotating state. The front end of port connecting piece 23 is provided with the hole with 7 external diameter complex of pipe, use the internal diameter to be 430mm, the external diameter is 460 mm's pipe as an example, the internal diameter of hole is for setting for between 465 ~ 470mm, the degree of depth is 25 ~ 30mm, when the cylinder promoted movable base 21 and moves to 7 tip on the pipe, make the front end of pipe 7 get into in the hole, and the terminal surface of pipe 7 and the bottom surface of hole and tightly form static seal, for convenience 7 front ends on the pipe get into the hole, the outward flange in hole sets up the chamfer structure. When the round tube 7 is driven to rotate circumferentially by the support roller group, the port connecting piece 23 rotates together with the round tube 7, and the front movable seat body is in a static state. In this embodiment, a 500mm skeleton seal ring is used as the rotary seal member 22, and the skeleton seal ring is a general product in the mechanical industry.
The upper end of preceding activity pedestal is provided with the horizontal through-hole of arranging with the axle center with the port connecting piece, and preceding activity pedestal 21 rear end is connected with along horizontal arrangement hold a section of thick bamboo 24, hold a section of thick bamboo 24 and preceding activity pedestal 21's horizontal through-hole intercommunication and the internal diameter is close with the pipe 7 internal diameter that needs the spraying, hold a section of thick bamboo 24 front end and preceding activity pedestal 21 fixed connection and arrange with the axle center with horizontal through-hole, hold a section of thick bamboo 24 rear end plate and be provided with horizontal central through-hole.
The air outlet pipe of the front movable seat body 21 is arranged at the position of the front end of the containing cylinder 24 close to the front movable seat body 21. The switch component 25 is arranged near the front end of the containing barrel 24 and used for controlling the opening and closing of the front end of the containing barrel 24, the switch component 25 comprises a vertical guide groove and a movable insertion plate, the vertical guide groove is arranged in the end baffle plate along the cross section of the axial inner cavity, the movable insertion plate is slidably arranged in the vertical guide groove, when the movable insertion plate moves outwards along the vertical guide groove, the front end of the containing barrel is opened, and when the insertion plate moves inwards along the vertical sliding groove, the front end of the containing barrel is closed.
The port connector of the rear movable seat body 31 has the same structure as the port connector of the front movable seat body 21, and the rotary sealing connection mode is also the same, which is not described herein again. When the cylinder pushes the rear movable seat body 31 to move towards the rear end of the circular tube 7, the rear end of the circular tube 7 enters the inner hole of the port connecting piece of the rear movable seat body 31, and the rear end surface of the circular tube 7 and the bottom surface of the inner hole of the port connecting piece of the rear movable seat body 31 form static seal. As the pipe is driven in circumferential rotation by the set of support rollers 12, the port connections rotate with the pipe under the action of friction.
In some embodiments, the rear movable seat body is a shell structure having a central inner cavity, the central inner cavity is provided with an electric heating wire for heating air, the output end of the air delivery pump is connected with the rear end of the rear movable seat body 31, the front end of the rear movable seat body is uniformly provided with vent holes, and the air delivered into the central inner cavity by the air delivery pump is heated by the electric heating wire and then delivered into the circular tube 7 through the vent holes.
In some embodiments, the electric heating element 52 is disposed on the air inlet duct outside the rear movable housing 31.
The method for spraying the coating on the inner wall of the circular tube is described below with reference to fig. 4 and 5:
fig. 4 is a schematic view of the apparatus in a spray process.
As shown in the figure, the round tube 7 is placed on the supporting roller set 12 in the horizontal direction, the front movable seat body 21 and the rear movable seat body 31 move inwards respectively, the port connecting piece of the front movable seat body 21 forms a static seal fit with the front end of the round tube 7, and the port connecting piece of the rear movable seat body 21 forms a static seal fit with the rear end of the round tube.
The movable trolley 43 moves forwards along the transverse guide rail, the support pipe 42 drives the spraying head 41 to move to the rear end of the circular pipe 7, the support roller group 12 drives the circular pipe 7 to rotate in the circumferential direction and starts to work as a jet pump of the coating conveying pump 44, coating is supplied to the spraying head 41 from the output port of the jet pump through the support pipe 42, the coating is sprayed onto the pipe wall of the circular pipe through the nozzle 412, and the movable trolley drives the spraying head to retreat and move to the front end of the circular pipe to finish spraying of the inner wall of the circular pipe 7.
In the spraying process, the universal support wheel 413 of the spraying head 41 is supported on the inner wall of the circular tube 7, the spraying head 41 is supported, so that the spraying head 41 is always located at the center of the circular tube 7, and the support tube 43 drives the spraying head to move backwards, and the nozzle 412 is located at the front end of the spraying head 41, so that the universal support wheel 413 located at the rear end of the spraying head 41 cannot roll on the coating sprayed on the inner wall of the circular tube 7, and the integrity of the coating is kept.
After the spraying is finished, the moving trolley 43 drives the spraying head 41 to enter the containing cylinder 24 of the front movable seat body 21, and the switch part 25 at the front end of the containing cylinder 24 is closed, that is, when the inserting plate moves inwards along the vertical sliding groove, the front end of the containing cylinder 24 is closed and is separated from the circular tube 7 to form a closed space.
Fig. 5 is a schematic view of the device in a drying process.
As shown in the figure, the air delivery pump 51 drives the external air to enter the circular tube 7 from the rear movable seat body 21, and the air passing through the air heating part 52 flows through the inner cavity of the circular tube 7 to heat and dry the coating. The round pipe 7 is driven to be in a circumferential rotation state all the time by the supporting roller group 12, so that the phenomenon that the coating flows from the top surface to the bottom surface under the action of gravity can be prevented, and the nonuniformity of the coating is avoided.
Meanwhile, in the process of heating and drying the coating, the switch part 25 at the front end of the containing cylinder 24 is closed, so that the containing cylinder 24 and the circular tube 7 are isolated from each other to form an independent closed space, and the dried hot air cannot enter the containing cylinder 24, so that the phenomenon that the coating at the nozzle 412 is dried and solidified to block the nozzle due to the heating of the hot air on the spraying head 41 is avoided.
The supporting roller group 12 is driven by a motor, the motor is provided with a high-speed rotating speed and a low-speed rotating speed, and the supporting roller group runs at a high speed in the spraying process, so that the spraying uniformity is facilitated; in the drying process, the supporting roller group rotates at a low speed, so that the coating is prevented from flowing, and the electric power consumption required by the low-speed operation is reduced.
Fig. 6 is a schematic structural diagram of a first embodiment of a rotary drive mechanism of the spray head.
As shown in the drawing, in the present embodiment, a rotary drive mechanism for driving the spray head 41 to rotate is provided on the traveling carriage 43.
The rotary driving mechanism comprises a first gear 61, a second gear 62 and a rotary power component which are arranged on the movable trolley 43, the first gear 61 is meshed with the second gear 62, the support pipe 42 is fixedly connected with the first gear 61, and the second gear 62 is driven by the rotary power component.
In the spraying process, the moving trolley 43 drives the spraying head 41 to axially move in the circular tube 7 through the support tube 42, the motor serving as a rotary driving mechanism drives the second gear 62 to rotate and the first gear 61 to rotate, the support tube 42 and the spraying head 41 are driven to rotate due to the fixed connection between the first gear 61 and the support tube 42, the rotating direction of the spraying head 41 is opposite to that of the circular tube 7, and the spraying mode that the spraying head 41 axially moves and circumferentially rotates is realized.
The round tube 7 is driven by the supporting roller group to rotate clockwise at the rotating speed of 90 revolutions per minute, the spraying head 41 rotates anticlockwise at the rotating speed of 150 revolutions per minute, and the rotating speed of the spraying head 41 relative to the round tube 7 is 240 revolutions per minute. If the spray head 41 is not rotating, the spray head 41 rotates at 90 revolutions per minute relative to the barrel 7. Can derive, the shower nozzle 41 obviously increases for pipe 7 rotational speed for the shower nozzle 41 sprays the coating in pipe 7 more even, is favorable to forming even coating, improves the spraying degree of consistency.
Fig. 7 is a schematic structural diagram of a second embodiment of a rotary drive mechanism of the spray head.
As shown, in this embodiment, a rotary drive mechanism for driving the spray head to rotate is disposed outside the front movable seat.
The rotary driving mechanism comprises a transmission turntable 63, a third gear 64 and a rotary power part which are arranged on the front movable seat body 21, gear teeth meshed with the third gear are uniformly distributed on the outer circumference of the transmission turntable, the supporting tube 42 penetrates through the transmission turntable 63 and is matched with a central through hole of the transmission turntable 63 in a circumferential fixed manner in an axial sliding manner, and the rotary power part drives the third gear to rotate.
The cross-section of stay tube 42 is circular and the outside is provided with the spline groove, and the radial through-hole department of transmission carousel 63 is fixed with the spline hole with spline groove sliding fit, through the sliding fit of spline groove and spline hole for transmission carousel 63 and stay tube 42 circumference are fixed and axial slip is free. The motor as the rotary power part drives the third gear to rotate, which drives the transmission turntable 63 to rotate, thereby driving the support tube 42 to rotate circumferentially.
The embodiment can also realize the spraying mode that the spraying head 41 axially moves and circumferentially rotates, and is matched with the rotation of the circular tube, so that the uniform coating is favorably formed, and the spraying uniformity is improved. Moreover, the transmission turntable 63 and the motor are both arranged on the front movable seat body 21, so that the circumferential rotation and the axial sliding of the supporting tube 42 are smoother, the transmission turntable and the motor do not occupy the space of the base any more, the length of the base is reduced, and the occupied space is reduced.
Fig. 8 is a schematic structural view of a coating machine for simultaneously coating the inner walls of a plurality of circular tubes. Fig. 9 is an operation schematic diagram of the coating machine for simultaneously coating the inner walls of a plurality of circular tubes.
As shown in the figure, a plurality of individually matched rotary supporting units, end closing units, spraying units and drying units are arranged on the base 11 at intervals along the longitudinal direction, so that the inner wall coating of a plurality of round pipes 7 can be sprayed at the same time.
The automatic circular pipe inner wall spraying device comprises a plurality of circular pipe inner wall spraying automatic devices which are longitudinally arranged in parallel, wherein each circular pipe inner wall spraying automatic device shares one set of drying unit, each drying unit comprises an air conveying pump 51, an air heating part 52 and an air filtering part 53, different air inlet pipes are respectively connected with each rear movable base body at the air heating part 52 in order to realize independent control, different air outlet pipes are respectively connected between the front movable base body and an air filter, and valves 54 for controlling the on-off of channels are arranged on each air inlet pipe and each air outlet pipe. The rotation support unit, the end closing unit, and the spraying unit of each of the circular tube inner wall spraying automation devices can be independently operated with respect to the rotation support unit, the end closing unit, and the spraying unit of the other circular tube inner wall spraying automation devices. The design mode can save the occupied area and improve the centralized management degree.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (3)
1. The circular tube inner wall spraying method is used for a circular tube inner wall spraying automation device, and the circular tube inner wall spraying automation device comprises a rotary supporting unit, an end part sealing unit, a spraying unit and a drying unit; the rotary supporting unit is used for driving a circular tube (7) to be sprayed to rotate circumferentially and comprises a supporting roller set (12) arranged on a base (11); the end part sealing unit is used for sealing the end part of a round pipe (7) in the spraying and drying processes and comprises a front movable seat body (21) and a rear movable seat body (31) which are oppositely arranged at two ends of a base and can transversely slide, the upper ends of the front movable seat body (21) and the rear movable seat body (31) are connected with a port connecting piece (23) which is matched and connected with the end part of the round pipe (7) through a rotary sealing piece (22), a containing cylinder (24) which extends outwards along the transverse direction is arranged on the outer side of the front movable seat body (21), the containing cylinder (24) is communicated with a transverse through hole (26) at the upper end of the front movable seat body (21), a switch component (25) which is used for controlling the opening and closing of the front end of the containing cylinder (24) is arranged near the front end of the containing cylinder (24), and a transverse central through hole is arranged on the rear end plate of the containing cylinder (24); the spraying unit is used for spraying a coating on the inner wall of the circular tube and comprises a spraying head (41), a support tube (42), a movable trolley (43) for driving the spraying head (41) to move along the circular tube (7) and a coating conveying pump (44) for conveying a coating to the spraying head (41); the movable trolley (43) is arranged on the base (11) and can move in a reciprocating mode along the transverse direction, the spraying head (41) is connected to the movable trolley (43) through a supporting pipe (42) which is movably penetrated through a central through hole of the rear end plate of the containing cylinder (24), and the coating material conveying pump (44) is connected with the spraying head (41) through the supporting pipe (42); the drying unit is used for drying a coating on the inner wall of a circular tube and comprises an air conveying pump (51), an air heating part (52) and an air filtering part (53), wherein the rear movable seat body (31) is connected with an air inlet pipe, the front movable seat body is connected with an air outlet pipe, the discharge end of the air conveying pump (51) is connected with the air inlet pipe, the air heating part (52) is arranged on the air inlet pipe, and the air filtering part (53) is arranged on the air outlet pipe; the method is characterized in that: placing a circular tube (7) on the supporting roller set (12) along the transverse direction, wherein the front movable seat body (21) and the rear movable seat body (31) move inwards respectively, the port connecting piece of the front movable seat body (21) seals the front end of the circular tube, and the port connecting piece of the rear movable seat body (31) seals the rear end of the circular tube; the movable trolley (43) drives the spraying head (41) to move to the rear end of the circular tube (7) through the supporting tube (42); the supporting roller group (12) drives the circular tube to rotate in the circumferential direction, the movable trolley (43) drives the spraying head (41) to move towards the front end of the circular tube through the supporting tube (42), the coating conveying pump (44) conveys coating to the spraying head (41), and the coating is sprayed out from the nozzle (412) to spray the inner wall of the circular tube; after the spraying is finished, the movable trolley (43) drives the spraying head (41) to enter the containing cylinder (24) of the front movable seat body (21), and the switch component (25) at the front end of the containing cylinder (24) is closed; the air delivery pump (51) drives the air passing through the air heating part (52) to flow through the inner cavity of the circular tube, and the supporting roller group (12) drives the circular tube to rotate circumferentially to heat and dry the coating.
2. The method for spraying the inner wall of the circular tube according to claim 1, wherein: the supporting roller set (12) is provided with a high-speed rotation state and a low-speed rotation state, and in the spraying process, the supporting roller set (12) drives the circular tube to rotate at a high speed; in the drying process, the support roller set (12) drives the round pipe to rotate at a low speed.
3. The spraying machine for simultaneously spraying the inner walls of the plurality of circular tubes comprises a plurality of automatic circular tube inner wall spraying devices which are longitudinally arranged in parallel; the automatic circular tube inner wall spraying device comprises a rotary supporting unit, an end part sealing unit, a spraying unit and a drying unit; the rotary supporting unit is used for driving a circular tube (7) to be sprayed to rotate circumferentially and comprises a supporting roller set (12) arranged on a base (11); the end part sealing unit is used for sealing the end part of a round pipe (7) in the spraying and drying processes and comprises a front movable seat body (21) and a rear movable seat body (31) which are oppositely arranged at two ends of a base and can transversely slide, the upper ends of the front movable seat body (21) and the rear movable seat body (31) are connected with a port connecting piece (23) which is matched and connected with the end part of the round pipe (7) through a rotary sealing piece (22), a containing cylinder (24) which extends outwards along the transverse direction is arranged on the outer side of the front movable seat body (21), the containing cylinder (24) is communicated with a transverse through hole (26) at the upper end of the front movable seat body (21), a switch component (25) which is used for controlling the opening and closing of the front end of the containing cylinder (24) is arranged near the front end of the containing cylinder (24), and a transverse central through hole is arranged on the rear end plate of the containing cylinder (24); the spraying unit is used for spraying a coating on the inner wall of the circular tube and comprises a spraying head (41), a support tube (42), a movable trolley (43) for driving the spraying head (41) to move along the circular tube (7) and a coating conveying pump (44) for conveying a coating to the spraying head (41); the movable trolley (43) is arranged on the base (11) and can move in a reciprocating mode along the transverse direction, the spraying head (41) is connected to the movable trolley (43) through a supporting pipe (42) which is movably penetrated through a central through hole of the rear end plate of the containing cylinder (24), and the coating material conveying pump (44) is connected with the spraying head (41) through the supporting pipe (42); the drying unit is used for drying a coating on the inner wall of a circular tube and comprises an air conveying pump (51), an air heating part (52) and an air filtering part (53), wherein the rear movable seat body (31) is connected with an air inlet pipe, the front movable seat body is connected with an air outlet pipe, the discharge end of the air conveying pump (51) is connected with the air inlet pipe, the air heating part (52) is arranged on the air inlet pipe, and the air filtering part (53) is arranged on the air outlet pipe; each round tube inner wall spraying automation equipment sharing one set of drying unit, drying unit includes air delivery pump (51), air heating part (52) and air filter part (53), its characterized in that: the rotary supporting unit, the end part sealing unit and the spraying unit of each circular tube inner wall spraying automation device can independently act relative to the rotary supporting unit, the end part sealing unit and the spraying unit of other circular tube inner wall spraying automation devices; different air inlet pipes are respectively connected between the air heating component (52) and each rear movable seat body, different air outlet pipes are respectively connected between the front movable seat body and the air filter, and valves (54) for controlling the on-off of the channels are arranged on the air inlet pipes and the air outlet pipes.
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| CN202010666056.6A CN111940204B (en) | 2020-07-12 | 2020-07-12 | Automatic device and method for spraying inner wall of circular tube |
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| CN111940204B true CN111940204B (en) | 2021-10-08 |
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| 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 |
| CN117861913A (en) * | 2024-03-11 | 2024-04-12 | 潍坊萨伯特精密转动设备有限公司 | Screw pump stator pipe inner wall spraying equipment |
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| CN102773207A (en) * | 2012-08-15 | 2012-11-14 | 黄石新兴管业有限公司 | Spraying process method and device for inner wall of small-caliber nodular cast iron pipe |
| CN104148227A (en) * | 2014-07-30 | 2014-11-19 | 新兴铸管股份有限公司 | Multicomponent medium inner-wall spraying device for nodular cast iron pipes |
| CN104209214A (en) * | 2014-09-30 | 2014-12-17 | 常州冯士节能环保科技有限公司 | Height-adjustable pipe inner wall spraying equipment |
| CN204544522U (en) * | 2014-12-19 | 2015-08-12 | 南宁职业技术学院 | A kind of automation paint spraying apparatus |
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| CN210279628U (en) * | 2019-06-01 | 2020-04-10 | 邹春怡 | Wallboard spraying device for building |
| CN111266221B (en) * | 2020-04-15 | 2020-11-27 | 温州大学激光与光电智能制造研究院 | Automatic spraying machine for steel pipes |
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Effective date of registration: 20231130 Address after: No. 248 Chengjian Road, Minhang District, Shanghai, 201100 Patentee after: Shanghai Guankang Technology Co.,Ltd. Address before: 257021 room 456-2, west block, international trade building, 53 Fuqian street, Dongying District, Dongying City, Shandong Province Patentee before: Dongying Shengzi Automation Technology Co.,Ltd. |
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