CN115350852B - Offset type large-caliber bent pipe inner spraying inner and outer side uniform mixing device and application method thereof - Google Patents
Offset type large-caliber bent pipe inner spraying inner and outer side uniform mixing device and application method thereof Download PDFInfo
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- CN115350852B CN115350852B CN202211157019.8A CN202211157019A CN115350852B CN 115350852 B CN115350852 B CN 115350852B CN 202211157019 A CN202211157019 A CN 202211157019A CN 115350852 B CN115350852 B CN 115350852B
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- snake bone
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- 238000005507 spraying Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 76
- 241000270295 Serpentes Species 0.000 claims abstract description 67
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 67
- 239000000843 powder Substances 0.000 claims abstract description 44
- 239000011248 coating agent Substances 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000004429 Calibre Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Spray Control Apparatus (AREA)
Abstract
The invention discloses an inner and outer spray coating uniform mixing device for an offset large-caliber bent pipe and an application method thereof, which are suitable for the bent pipe, wherein the inner and outer spray coating uniform mixing device for the offset large-caliber bent pipe comprises a machine head, the machine head comprises a spray head unit with a spray nozzle and a motor unit, the spray head unit is positioned at the outer side of the bent pipe after the machine head enters the bent pipe, and the motor unit is positioned at the inner side of the bent pipe; the spray head unit and the motor unit are arranged on the balance rack in parallel and are in driving connection through a transmission chain, and the bottom of the balance rack is connected with a machine head vertical support rod with a roller; the balancing rack is connected with the snake bone section, a cable connected with a power supply and a powder conveying pipe connected with the powder supply mechanism are arranged in the snake bone section, the cable is connected with the motor unit, and the powder conveying pipe is connected with the nozzle. According to the invention, the spray head unit is biased, the powder receiving amount of the inner side and the outer side of the elbow is regulated under the condition that the rotary spraying mode is not changed, the problem of the thickness difference of the inner side coating and the outer side coating generated when the spray head is used for spraying in the middle is solved, and the problem of the thickness difference of the inner side coating and the outer side coating in the inner spraying process of the large-caliber elbow is solved.
Description
Technical Field
The invention belongs to the field of conveying pipe bend spraying, and particularly relates to an offset type inner and outer side uniform spraying device for a large-caliber bend and an application method thereof.
Background
Elbows are an important component of a transfer line. The bent pipe is generally made of steel, and the corrosion problem of a conveying medium to a pipe body can be effectively solved by spraying the bent pipe, wherein spraying in the bent pipe comprises phenolic primer spraying and sintering epoxy powder spraying.
In recent years, automatic control technology using PLC as a core is gradually applied in the field of elbow spraying. The automation of spraying in the bent pipe needs to solve the problem of turning and walking of the spraying device in the bent pipe. In this regard, technicians designed a "snake bone joint + vertical support rod + horizontal restraint rod" device, and the gyro wheel was installed to the tip of vertical support rod, horizontal restraint rod. The device can ensure that the spraying device freely passes through and centers in the bent pipe, so that the spraying efficiency in the bent pipe is obviously improved.
The above-mentioned "snake bone knot + vertical support pole + horizontal restriction pole" device has the problem that: as shown in FIG. 1, because the spray head is positioned at the pipe center line, the vertical bisector of the end face circle of the spray head coincides with the vertical bisector of the cross section circle of the corresponding bent pipe, and when the spraying device works at a constant speed (the spray head rotates at a constant speed and the device walks at a constant speed), the powder receiving amount of the inner side and the outer side of the bent pipe section is the same; the central angle and the arc length which are passed through in unit time are the same, the area of the inner surface of the outer side of the bent pipe and the area of the inner surface of the inner side of the bent pipe which correspond to the same central angle are different, and the powder sprayed from the spray head to the inner surface of the inner side and the outer side of the bent pipe in uniform rotation are the same, so that the coating thickness obtained by the inner wall and the outer side of the bent pipe is different even though the spray device walks at uniform speed and the spray head rotates at uniform speed in the process of spraying the inside of the bent pipe, and the difference is more obvious along with the increase of the diameter of the bent pipe. The inner and outer coating thickness differences lead to problems in terms of quality: when the thickness of the coating on the inner wall of the inner side of the bent pipe is moderate, the thickness of the coating on the outer side inner wall is not enough; when the thickness of the coating on the inner wall of the outer side of the bent pipe is moderate, the thickness of the inner wall coating exceeds the standard. The coating is unqualified when the thickness is insufficient, and the problems of powder falling, incomplete sintering and the like are often caused by the excessive thickness.
Some technicians design a fan-shaped area swing type spraying mechanism, and the spraying amount of the inner side spray gun is small and the spraying amount of the outer side spray gun is large by respectively arranging independent powder conveying pipelines of spray guns corresponding to the inner side spray and the outer side spray, so that the problem of thickness deviation of the inner wall coating of the inner side and the outer side of the bent pipe is solved. However, the method needs a powder supply pipeline and a control system which are mutually independent, and has high cost and high implementation difficulty.
Disclosure of Invention
The invention aims to provide a device for uniformly mixing the inner side and the outer side of a large-caliber bent pipe in the inner spraying process of the large-caliber bent pipe and an application method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the inner and outer side spraying and uniformly mixing device for the offset large-caliber bent pipe comprises a machine head, wherein the machine head comprises a spray head unit with a spray nozzle and a motor unit, the spray head unit is positioned at the outer side of the bent pipe after the machine head enters the bent pipe, and the motor unit is positioned at the inner side of the bent pipe; the spray head unit and the motor unit are arranged on the balance rack in parallel and are in driving connection through a transmission chain, and the bottom of the balance rack is connected with a machine head vertical supporting rod with a roller; the balancing stand is connected with a snake bone section, a cable connected with a power supply and a powder conveying pipe connected with a powder supply mechanism are arranged in the snake bone section, the cable is connected with a motor unit, and the powder conveying pipe is connected with a nozzle.
Preferably, the snake bone section is connected with a pushing mechanism, the pushing mechanism is controlled and driven by the control system, and the control system controls the pushing mechanism to drive the snake bone section to realize forward or backward movement.
Preferably, the snake bone section comprises a plurality of snake bone sections with snake bone section supporting rods, and adjacent snake bone sections in the plurality of snake bone sections are movably connected through connecting plates.
Preferably, two ends of the connecting plate for connecting the plurality of snake bone segments are symmetrically provided with snake bone segment horizontal constraint rods, and the snake bone segment horizontal constraint rods are provided with rollers.
Preferably, the nozzle unit and the motor unit are respectively provided with a machine head horizontal constraint rod, the machine head horizontal constraint rods comprise a first machine head horizontal constraint rod and a second machine head horizontal constraint rod, the first machine head horizontal constraint rod and the second machine head horizontal constraint rod are symmetrically arranged on two sides of the nozzle unit and the motor unit, and the first machine head horizontal constraint rod and the second machine head horizontal constraint rod are respectively positioned on the inner side and the outer side of the bent pipe.
Preferably, the first machine head horizontal constraint rod and the second machine head horizontal constraint rod are respectively provided with a roller, and the balance rack of the machine head can be ensured to freely pass through and center in the bent pipe through the rollers.
Preferably, the spray head unit and the motor unit are installed in a mode of adjustable groove rails, and the adjustment of the offset of the spray head unit is achieved by adjusting the distance between the spray head unit and the motor unit.
Preferably, the nozzles are uniformly distributed around the circumference of the nozzle unit with the center of the nozzle unit as the center.
The invention also discloses an application method of the offset type large-caliber bent pipe inner spraying inner and outer spraying uniform mixing device, which comprises the following steps:
S1: determining the offset of the nozzle unit according to the specification of the target elbow, and determining that the sizes of the nozzle unit, the motor unit, the vertical support rod of the machine head, the horizontal constraint rod of the machine head, the snake bone segments, the support rod of the snake bone segments and the horizontal constraint rod of the snake bone segments are matched with the diameter and the length of the target elbow;
S2: the distance between the nozzle unit and the motor unit is regulated to enable the offset of the nozzle unit to meet the requirement, and the nozzle unit, the motor unit, the balance rack, the vertical support rod of the machine head and the horizontal constraint rod of the machine head are regulated to be in a balanced state;
s3: the bent pipe is in place, and the bent pipe subjected to rust removal on the inner wall and heat treatment on the pipe body is placed in a coating construction station;
s4: the control system starts a pushing mechanism, and the pushing mechanism pushes the snake bone section together with the machine head to advance from one end of the bent pipe to the other end of the bent pipe;
S5: checking the biasing effect of the spray head unit and whether the spraying distance between the spray nozzle and the bent pipe on the spray head unit meets the requirement or not, and entering the next step after the spray head unit is qualified;
s6: starting a motor unit, wherein the motor unit drives the spray head unit to rotate through a transmission chain, and meanwhile, the powder supply device is connected with a nozzle through a powder conveying pipe to start powder spraying and coating;
S7: starting the propelling device, and enabling the snake bone segments to drive the machine head to retreat at a constant speed until the machine head retreats to one end of the bent pipe, so that powder spraying and coating of the bent pipe are completed.
Preferably, in the step S4, when the pushing mechanism pushes the snake bone segment and the handpiece to advance from one end of the elbow to the other end of the elbow, the end face of the nozzle unit slightly exceeds the end face of the elbow.
According to the invention, the spray head unit is biased, the powder receiving amount of the inner side and the outer side of the elbow is regulated under the condition that the rotary spraying mode is not changed, the problem of the thickness difference of the inner side coating and the outer side coating generated when the spray head is used for spraying in the middle is solved, and the problem of the thickness difference of the inner side coating and the outer side coating in the inner spraying process of the large-caliber elbow is solved.
Drawings
FIG. 1 is a schematic view of a cross-section of the position in a pipe when a spray head unit is centered in a prior art in-pipe spray device;
FIG. 2 is a schematic diagram of the structure of a machine head of an offset type inner and outer side mixing device for spraying a large-caliber bent pipe, which is provided by the invention, in front view;
FIG. 3 is a schematic top view of a device for uniformly spraying the inner side and the outer side of a large-caliber bent pipe according to the present invention;
fig. 4 is a schematic structural diagram of a cross section of a position in a pipe when a spray head unit in the spray-coating inner-outer-side uniform-mixing device in a bias type large-caliber bent pipe provided by the invention is biased.
The numbers in the figure are as follows:
1. A head unit; 2. a nozzle; 3. a motor unit; 4. a drive chain; 5. bending the pipe; 6. a machine head vertical support rod; 7. a balancing stand; 8. a first head horizontal constraint rod; 9. a second head horizontal constraint rod; 10. a snake bone segment horizontal restraint rod; 11. a cable; 12. a powder delivery tube; 13. snake bone segments; 14. a connecting plate; 15. a machine head; 16. a snake bone segment supporting rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 2 to 4, the invention provides an offset type inner and outer side spraying uniform device for a large-caliber bent pipe and an application method thereof, which are suitable for spraying the bent pipe 5, wherein the shorter arc length of the bent pipe 5 is defined as the inner side, and the longer arc length of the bent pipe 5 is defined as the outer side; and defines the left side of the bent pipe 5 as the outside and the right side of the bent pipe 5 as the inside in fig. 1.
The invention relates to an offset type inner and outer side spraying uniform mixing device for a large-caliber bent pipe, which comprises a machine head 15, wherein the machine head 15 comprises a spray head unit 1 with a spray nozzle 2 and a motor unit 3, the spray head unit 1 is arranged at the outer side of the bent pipe 5, and the motor unit 3 is arranged at the inner side of the bent pipe 5; the spray head unit 1 and the motor unit 3 are arranged on the balance rack 7 in parallel and are in driving connection through the transmission chain 4, and the bottom of the balance rack 7 is connected with the machine head vertical support rod 6 with the roller; the balancing stand 7 is connected with a snake bone section, the snake bone section adopts a hollow structure, the snake bone section comprises a plurality of snake bone sections 13 with snake bone section supporting rods 16, and adjacent snake bone sections 13 in the plurality of snake bone sections 13 are movably connected through connecting plates 14. These snake bone segments can be bent by the connecting plates 14; the snake bone joints 13 are provided with a cable 11 connected with a power supply and a powder conveying pipe 12 connected with a powder supply mechanism; wherein the cable 11 is connected with the motor unit 3, the powder conveying pipe 12 is connected with the nozzle 2, and the nozzle 2 is uniformly and dispersedly arranged on the circumference of the nozzle unit 1 by taking the center of the nozzle unit 1 as the center.
Furthermore, the pushing mechanism is connected to the snake bone section, the pushing mechanism is controlled and driven by the control system, and the control system controls the pushing mechanism to drive the snake bone section to move forwards or backwards, so that automatic spraying can be realized.
Further, the nozzle unit 1 and the motor unit 3 provided by the invention are respectively provided with a machine head horizontal constraint rod, the machine head horizontal constraint rods comprise a first machine head horizontal constraint rod 8 and a second machine head horizontal constraint rod 9, the first machine head horizontal constraint rod 8 and the second machine head horizontal constraint rod 9 are symmetrically arranged at two sides of the nozzle unit 1 and the motor unit 3, the first machine head horizontal constraint rod 8 and the second machine head horizontal constraint rod 9 are respectively positioned at the inner side and the outer side of the bent pipe 5, and rollers are respectively arranged on the first machine head horizontal constraint rod 8 and the second machine head horizontal constraint rod 9. The two ends of the connecting plate 14 for connecting the plurality of snake bone segments 13 are symmetrically provided with snake bone segment horizontal constraint rods 10, and the snake bone segment horizontal constraint rods 10 are provided with rollers. The free passage and centering of the balancing stand 7 and the snake bone segments of the handpiece 15 in the elbow is ensured by these rollers.
Furthermore, the spray head unit 1 and the motor unit 3 provided by the invention are installed in a mode of adjustable groove rails, and the offset of the spray head unit 1 is adjusted by adjusting the distance between the spray head unit 1 and the motor unit 3.
Further, the invention provides a lifting block under the motor unit 3, which is used for auxiliary adjustment of the balancing stand.
The invention also provides an application method of the offset type large-caliber bent pipe inner spraying inner and outer spraying uniform mixing device, which comprises the following steps:
S1: according to the specification of the target elbow 5, determining the offset of the nozzle unit 1, and determining that the sizes of the nozzle unit 1, the motor unit 3, the vertical support rod 6 of the machine head, the horizontal constraint rod of the machine head, the snake bone segments 13, the support rod 16 of the snake bone segments and the horizontal constraint rod 10 of the snake bone segments are matched with the diameter and the length of the target elbow 5;
S2: the distance between the nozzle unit 1 and the motor unit 3 is regulated to enable the offset of the nozzle unit 1 to meet the requirement, and the nozzle unit 1, the motor unit 3, the balance stand 7, the machine head vertical support rod 6 and the machine head horizontal constraint rod are regulated to be in a balance state;
s3: the bent pipe 5 is in place, and the bent pipe 5 subjected to rust removal on the inner wall and heat treatment on the pipe body is placed in a coating construction station;
s4: the control system starts the pushing mechanism, the pushing mechanism pushes the snake bone section together with the machine head 15 to advance from one end of the bent pipe 5 to the other end of the bent pipe 5, and the end face of the spray head unit 1 slightly exceeds the end face of the bent pipe 5.
S5: checking: at this time, the vertical supporting rod 6 of the machine head is vertical to the horizontal plane, and the roller at the end part of the vertical supporting rod 6 of the machine head is positioned at the lowest part of the inner circle of the bent pipe 5, and no contact pressure exists between the horizontal restraining rod of the machine head and the inner wall (namely the outer side and the inner side) of the bent pipe 5. Meanwhile, checking the biasing effect of the spray head unit 1 and whether the spraying distance between the spray nozzle 2 and the bent pipe 5 on the spray head unit 1 meets the requirement or not, and entering the next step after the spray head unit 1 is checked to be qualified;
S6: starting the motor unit 3, wherein the motor unit 3 drives the spray head unit 1 to rotate through the transmission chain 4, and meanwhile, the powder supply device is connected with the spray nozzle 2 through the powder conveying pipe 12 to start powder spraying and coating;
s7: starting the propelling device, and driving the nose 15 to retreat at a constant speed by the snake bone segments 13 until the nose 15 retreats to one end of the bent pipe 5, and finishing powder spraying and coating of the bent pipe.
The working principle of the invention is as follows: as shown in fig. 4, the distance between the nozzle unit 1 and the motor unit 3 is defined as L, the distance from the center of the end face circle of the nozzle unit 1 to the vertical tangent line on the left side of the corresponding elbow cross section circle is defined as L2, when the distance L between the nozzle unit 1 and the motor unit 3 is adjusted, the nozzle unit 1 is offset to the outside of the elbow 5, and the vertical bisector of the end face circle of the nozzle unit 1 is located on the left side of the vertical bisector of the corresponding elbow cross section circle of the elbow 5 (i.e., the nozzle unit 1 is offset to the outside of the elbow 5, and the center of the nozzle unit 1 is offset to the left). Compared with the central arrangement of the spray head unit 1 in fig. 1, the inner surface area of the bent pipe 5 to be sprayed corresponding to the left side (the outer side of the bent pipe) of the end face circle perpendicular bisector of the spray head unit 1 is reduced, and the inner surface area of the bent pipe 5 to be sprayed corresponding to the right side (the inner side of the bent pipe) of the end face circle perpendicular bisector of the spray head unit 1 is increased. In unit time, the powder spraying amounts at two sides of the perpendicular bisector of the end face circle of the nozzle unit 1 are equal, so that the coating of the inner wall of the outer side of the corresponding bent pipe is thickened, and the coating of the inner wall of the inner side of the corresponding bent pipe is thinned.
The above technical solution is described in more detail below in connection with specific parameters.
Examples
In this embodiment, a seamless bent pipe bent by D1016 x 12.5mm and 90 ° will be taken as an example, and the implementation effect of the technology of this patent will be described.
D1016 x 12.5mm, inside diameter of the 90 ° bent seamless bend is 991mm; firstly performing shot blasting, rust removal and heating of a pipe body, and then sequentially performing phenolic primer spraying and sintering epoxy powder spraying on the inner wall of the bent pipe. The patent of the invention will be described below by taking a sintered epoxy powder spraying step as an example.
The first step: the offset amount of the head unit 1 is determined. D1016×12.5mm, 90 ° bent pipe, and the offset of the head unit 1 was determined to be 150m. The dimensions of the matched head vertical support bar 6, head horizontal restraint bar, snake bone segment support bar 16 and snake bone segment horizontal restraint bar 10 are selected.
And a second step of: the distance between the spray head unit 1 and the motor unit 3 is adjusted, so that the offset of the spray head unit reaches 150mm, and the spray head unit, the motor unit, the balance rack, the machine head vertical support rod, the machine head horizontal constraint rod and the like all reach an equilibrium state.
And a third step of: the elbow 5 is in place. And (3) placing the seamless bent pipe subjected to inner wall rust removal, pipe body heating and phenolic primer spraying, wherein the diameter of the seamless bent pipe is 12.5mm and bent at 90 degrees, to an FBE coating construction station.
Fourth step: the spraying device pushing mechanism in the elbow pipe 5 is started through the control system, the snake bone segments are pushed, and the machine head 15 is advanced to the far end of the elbow pipe 5 from the near end of the elbow pipe 5, and then the end face of the spray head unit 1 exceeds the far end face of the elbow pipe 5 by 100mm.
Fifth step: and checking the biasing effect of the spray head unit 1 and whether the spraying distance of the spray head unit 1 meets the requirement, and if the biasing error of the spray head unit 1 is less than or equal to 15mm, considering the biasing to be qualified. After checking that the nozzles 2 of the nozzle unit are all spraying powder normally, the next step is performed.
Sixth step: the control system is started, the control system controls the starting motor unit 3 to rotate, and meanwhile, the powder supply device is connected with the nozzle 2 through the powder conveying pipe 12 to start powder spraying and coating.
Seventh step: the pushing device is started by the control system, and the running direction of the pushing device is opposite to that of the fourth step, the snake bone section drives the machine head 15 to retreat at a constant speed until the machine head 15 retreats to the near end of the bent pipe 5, and the powder spraying and coating of the bent pipe is completed.
After the inner spraying of the bent pipe is finished, the surface quality detection and the thickness detection are carried out on the spraying effect. The results show that the appearance spray coating quality is smooth and attractive, powder falling and powder piling are avoided, the thickness detection value of the inner side coating of the bent pipe is 150 microns, and the thickness detection value of the outer side coating is 152 microns. The difference in thickness between the inner and outer coating layers was 2 microns and was substantially eliminated.
According to the invention, the spray head unit is biased, the powder receiving amount of the inner side and the outer side of the elbow is regulated under the condition that the rotary spraying mode is not changed, the problem of the thickness difference of the inner side coating and the outer side coating generated when the spray head is used for spraying in the middle is solved, and the problem of the thickness difference of the inner side coating and the outer side coating in the inner spraying process of the large-caliber elbow is solved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a bias formula heavy-calibre return bend inner spray coating inside and outside mixing device, is applicable to return bend (5), includes aircraft nose (15), its characterized in that, aircraft nose (15) are including shower nozzle unit (1) and motor unit (3) of taking nozzle (2), after the aircraft nose gets into the return bend, shower nozzle unit (1) are located the outside of return bend (5), motor unit (3) are located the inboard of return bend (5); the spray head unit (1) and the motor unit (3) are arranged on the balance rack (7) in parallel and are in driving connection through the transmission chain (4), and the bottom of the balance rack (7) is connected with the machine head vertical support rod (6) with the idler wheels; one end of the balancing stand (7) is connected with a snake bone section, a cable (11) connected with a power supply and a powder conveying pipe (12) connected with a powder supply mechanism are arranged in the snake bone section, the cable (11) is connected with the motor unit (3), and the powder conveying pipe (12) is connected with the nozzle (2);
The snake bone segments comprise a plurality of snake bone segments (13) with snake bone segment supporting rods (16), and adjacent snake bone segments (13) in the plurality of snake bone segments (13) are movably connected through connecting plates (14);
two ends of a connecting plate (14) for connecting a plurality of snake bone segments (13) are symmetrically provided with snake bone segment horizontal constraint rods (10), and idler wheels are arranged on the snake bone segment horizontal constraint rods (10);
The spray head unit (1) and the motor unit (3) are respectively provided with a machine head horizontal constraint rod, the machine head horizontal constraint rods comprise a first machine head horizontal constraint rod (8) and a second machine head horizontal constraint rod (9), the first machine head horizontal constraint rod (8) and the second machine head horizontal constraint rod (9) are symmetrically arranged on two sides of the spray head unit (1) and the motor unit (3), and the first machine head horizontal constraint rod (8) and the second machine head horizontal constraint rod (9) are respectively positioned on the inner side and the outer side of the bent pipe (5);
The first machine head horizontal constraint rod (8) and the second machine head horizontal constraint rod (9) are respectively provided with a roller, and the machine head (15) and the balance rack (7) can be ensured to freely pass through and center in the bent pipe through the rollers.
2. The offset type inner and outer side uniform spraying device for the large-caliber bent pipe, which is disclosed in claim 1, is characterized in that a pushing mechanism is connected to the snake bone section, the pushing mechanism is controlled and driven by a control system, and the pushing mechanism is controlled by the control system to drive the snake bone section to realize forward or backward movement.
3. The device for uniformly adjusting the inner side and the outer side of the offset type large-caliber bent pipe in the spraying mode according to claim 1 is characterized in that the spray head unit (1) and the motor unit (3) are installed in an adjustable groove rail mode, and the offset of the spray head unit (1) is adjusted by adjusting the distance between the spray head unit (1) and the motor unit (3).
4. The device for uniformly mixing the inner side and the outer side of the offset type large-caliber bent pipe in the spraying process according to claim 1, wherein the nozzles (2) are uniformly distributed and arranged on the circumference of the spray head unit (1) by taking the center of the spray head unit (1) as the center.
5. An application method of an internal and external spray coating uniform device for a large-caliber bent pipe is characterized by adopting the internal and external spray coating uniform device for the large-caliber bent pipe, which is implemented by adopting the internal and external spray coating uniform device for the large-caliber bent pipe, and comprises the following steps of:
S1: according to the specification of the target elbow pipe (5), determining the offset of the nozzle unit (1), and determining that the sizes of the nozzle unit (1), the motor unit (3), the machine head vertical support rod (6), the machine head horizontal constraint rod, the snake bone segment (13), the snake bone segment support rod (16) and the snake bone segment horizontal constraint rod (10) are matched with the diameter and the length of the target elbow pipe (5);
s2: the distance between the spray head unit (1) and the motor unit (3) is regulated to enable the offset of the spray head unit (1) to meet the requirement, and the spray head unit (1), the motor unit (3), the balance rack (7), the machine head vertical support rod (6) and the machine head horizontal constraint rod are regulated to be in a balance state;
S3: the bent pipe (5) is in place, and the bent pipe (5) subjected to rust removal on the inner wall and heat treatment on the pipe body is placed in a coating construction station;
s4: the control system starts a pushing mechanism, and the pushing mechanism pushes the snake bone section together with the machine head (15) to advance from one end of the bent pipe (5) to the other end of the bent pipe (5);
S5: checking whether the biasing effect of the spray head unit (1) and the spraying distance between the spray nozzle (2) and the bent pipe (5) on the spray head unit (1) meet the requirements or not, and entering the next step after the spray head unit (1) is checked to be qualified;
S6: starting a motor unit (3), wherein the motor unit (3) drives the spray head unit (1) to rotate through a transmission chain (4), and meanwhile, the powder supply device is connected with a nozzle (2) through a powder conveying pipe (12) to start powder spraying and coating;
s7: starting the propelling device, and driving the machine head (15) to retreat at a constant speed by the snake bone segments (13) until the machine head (15) retreats to one end of the bent pipe (5), and finishing powder spraying and coating of the bent pipe.
6. The method for applying the offset type large-caliber elbow inner and outer spraying uniform mixing device according to claim 5, wherein in the step S4, when the pushing mechanism pushes the snake bone segment together with the nose (15) to advance from one end of the elbow (5) to the other end of the elbow (5), the end face of the nozzle unit (1) slightly exceeds the end face of the elbow (5).
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| CN202211157019.8A CN115350852B (en) | 2022-09-22 | 2022-09-22 | Offset type large-caliber bent pipe inner spraying inner and outer side uniform mixing device and application method thereof |
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| CN202211157019.8A CN115350852B (en) | 2022-09-22 | 2022-09-22 | Offset type large-caliber bent pipe inner spraying inner and outer side uniform mixing device and application method thereof |
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|---|---|---|---|---|
| JPS57127469A (en) * | 1981-01-28 | 1982-08-07 | Eikou Sangyo Kk | Device for lining internal surface of arc-shaped bent pipe with paste-like or paint-like lining material by spraying |
| KR100815838B1 (en) * | 2006-12-27 | 2008-03-21 | 덕원산업개발주식회사 | Old pipe rehabilitation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH024477A (en) * | 1988-06-22 | 1990-01-09 | Kubota Ltd | Internal surface coating |
| JP2003013197A (en) * | 2001-06-28 | 2003-01-15 | Shinwa Kogyo Kk | Method for forming thermal spray coating on inner surface of bent pipe, and device therefor |
| KR101280022B1 (en) * | 2013-03-25 | 2013-06-28 | (주)이젠리버텍 | Lining method for straight pipe and bent pipe |
| KR101547232B1 (en) * | 2014-11-24 | 2015-08-26 | 한국과학기술원 | Spray-lining Mobile Apparatus for Rehabilitation of Deteriorated Pipes |
| CN105478285B (en) * | 2016-02-14 | 2017-08-25 | 中国人民解放军后勤工程学院 | A kind of irregular curved tube inwall thick coating method for planning track of aerial spraying |
| KR101688369B1 (en) * | 2016-05-24 | 2016-12-20 | 주식회사 현대알비 | A inside diameter coating apparatus |
| CN108397638A (en) * | 2018-03-12 | 2018-08-14 | 哈尔滨工业大学（威海） | A kind of creeping motion type pipe robot |
| CN212856330U (en) * | 2020-06-29 | 2021-04-02 | 济宁市兖州区恒升机械有限公司 | Anticorrosive spraying device of return bend inner wall |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127469A (en) * | 1981-01-28 | 1982-08-07 | Eikou Sangyo Kk | Device for lining internal surface of arc-shaped bent pipe with paste-like or paint-like lining material by spraying |
| KR100815838B1 (en) * | 2006-12-27 | 2008-03-21 | 덕원산업개발주식회사 | Old pipe rehabilitation method |
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| CN115350852A (en) | 2022-11-18 |
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