CN113318887A - Spraying device for processing automotive interior - Google Patents
Spraying device for processing automotive interior Download PDFInfo
- Publication number
- CN113318887A CN113318887A CN202110806129.1A CN202110806129A CN113318887A CN 113318887 A CN113318887 A CN 113318887A CN 202110806129 A CN202110806129 A CN 202110806129A CN 113318887 A CN113318887 A CN 113318887A
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- China
- Prior art keywords
- spraying
- cylinder
- drying cylinder
- automotive interior
- frame
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
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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
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0242—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects being individually presented to the spray heads by a rotating element, e.g. turntable
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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
- B05B13/0278—Arrangement or mounting of spray heads
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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
Landscapes
- Spray Control Apparatus (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the field of spraying devices, and particularly relates to a spraying device for processing automotive interiors. The device can realize the rapid conversion of multiple stations, can realize spraying, drying and feeding and discharging operations simultaneously, realizes uninterrupted operation and has high processing efficiency.
Description
Technical Field
The invention relates to the technical field of spraying devices, in particular to a spraying device for processing automotive interiors.
Background
Automotive interior mainly indicates the automobile product that the inside repacking of car was used, involves the square face of car inside, for example car steering wheel cover, car cushion, car callus on the sole, inside goods of furniture for display rather than for use, inside decorative board, clap shelves panel etc. all are automotive interior product.
At present, before the automotive interior part is processed and leaves the factory, a spraying process is required to be carried out on the automotive interior part, so that the service life can be effectively prolonged, the automotive interior part can be matched with the overall decoration of an automobile, and the attractiveness is improved.
The existing spraying device is easy to have the problems of uneven spraying or low spraying efficiency during spraying, and therefore the spraying device for processing the automotive interior is provided.
Disclosure of Invention
The invention provides a spraying device for processing automotive interiors, which solves the problems in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a spraying device for processing automotive interiors comprises a supporting frame and a fixing frame, wherein the fixing frame is provided with a first spraying cylinder, a first drying cylinder, a second spraying cylinder, a second drying cylinder and an upper feeding station and a lower feeding station which are arranged in an annular array;
angle actuating mechanism's output shaft has the dwang of rotation connection on the mount, the cross-section of dwang is the T type, the one end of dwang is passed the mount and is slided and cup jointed the loose collar, be equipped with the spring of cup jointing on the dwang between loose collar and the mount, the telescopic link that the output shaft is located loose collar one side is installed to the one end of dwang, five array arrangement's apron is installed through a plurality of connecting pieces to the outside of loose collar, it is connected with axis of rotation one to run through the rotation on the apron, the one end of axis of rotation one is connected with the link, evenly install a plurality of dead levers on the annular edge of link, movable mounting has the centre gripping frame on the dead lever, slewing mechanism is installed to the other end of axis of rotation one.
The rotating mechanism comprises a second transmission gear fixedly connected to the other end of the first rotating shaft, one side of each of the first spraying cylinder, the first drying cylinder, the second spraying cylinder and the second drying cylinder is provided with a second motor installed on the extending part of the fixing frame, and an output shaft of the second motor is connected with a first transmission gear movably meshed with the second transmission gear.
It is worth explaining that the angle driving mechanism comprises a first motor arranged on the fixing frame, an output shaft of the first motor is connected with a swing arm with an L-shaped cross section, a transmission disc is arranged at one end of the rotating rod, five transmission grooves distributed in an annular array are formed in the transmission disc, and one end of the swing arm is connected with the transmission grooves in a sliding mode.
Furthermore, the cross-section of the fixed rod is L-shaped, a second rotating shaft is rotatably connected to the side wall of one end of the fixed rod, a third transmission gear is installed at one end of the second rotating shaft, a clamping frame is installed at the other end of the second rotating shaft, toothed rings are installed on the side walls of the first spraying cylinder, the first drying cylinder, the second spraying cylinder and the second drying cylinder, and the third transmission gear is movably meshed with the toothed rings.
It is worth mentioning that the spray pipe is a pipeline with one sealed end, the outer side wall of the pipeline is provided with spray nozzles which are uniformly distributed along the linear direction, and the other end of the spray pipe is connected with a spray painting device through a conduit.
Furthermore, the heating pipe is an electrothermal pipe, and a cylindrical protective net is arranged outside the heating pipe.
Still further, a plurality of air outlets are formed in the top ends of the first drying cylinder and the second drying cylinder, and a fan communicated with the outside is installed at one end of the protective net.
Preferably, the cross section of one end of the rotating rod is rectangular, and the cross section of one end of the connecting part of the rotating rod and the fixing frame is circular.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a spraying device for processing automotive interiors, which can realize rapid multi-station conversion, can realize spraying, drying and feeding and discharging operations at the same time and realize uninterrupted operation and high processing efficiency through the arrangement of a first spraying cylinder, a first drying cylinder, a second spraying cylinder, a second drying cylinder, a feeding and discharging station and an angle driving mechanism.
2. The invention provides a spraying device for processing automotive interiors, which can drive a clamping spraying piece on a connecting frame to revolve and simultaneously drive the clamping spraying piece on the connecting frame to rotate through the arrangement of a rotating mechanism, a cover plate, the connecting frame, a clamping frame, a gear ring and a transmission gear, so that the spraying uniformity is improved, and the spraying effect is good.
Drawings
FIG. 1 is a perspective view of a painting apparatus for processing an interior of an automobile according to the present invention;
FIG. 2 is a schematic connection diagram of a support frame, a fixing frame and a plurality of stations of the spraying device for processing the automotive interior according to the present invention;
FIG. 3 is a schematic view of a partial structure of a spraying apparatus for processing an interior of an automobile according to the present invention;
FIG. 4 is a schematic structural view of a telescopic rod, a rotating rod, a spring, a movable ring, a fixed frame and an angle driving mechanism of the spraying device for processing the automotive interior according to the present invention;
fig. 5 is a schematic connection diagram of a first rotating shaft, a second transmission gear, a fixing rod and a clamping frame of the spraying device for processing the automotive interior provided by the invention.
In the figure: 1. a support frame; 2. a first spray can; 3. a cover plate; 4. a first drying drum; 5. a second spray can; 6. a fixed mount; 7. a second drying drum; 8. a loading and unloading station; 9. a spray pipe; 10. heating a tube; 11. rotating the rod; 12. a toothed ring; 13. a drive plate; 1301. a transmission groove; 14. swinging arms; 15. a first motor; 16. a spring; 17. a movable ring; 18. a connecting member; 19. a telescopic rod; 20. a second motor; 21. a first transmission gear; 22. a connecting frame; 23. rotating a first shaft; 24. a second transmission gear; 25. fixing the rod; 26. a clamping frame; 27. a third transmission gear; 28. and a second rotating shaft.
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.
Referring to fig. 1-5, a spraying device for processing automotive interiors comprises a support frame 1 and a fixing frame 6, wherein the fixing frame 6 is provided with a first spraying cylinder 2, a first drying cylinder 4, a second spraying cylinder 5, a second drying cylinder 7 and a feeding and discharging station 8 which are arranged in an annular array, the feeding and discharging station 8 is located at the lowest part, the first spraying cylinder 2 and the second drying cylinder 7 are installed on the support frame 1, spraying pipes 9 are installed inside the first spraying cylinder 2 and the second spraying cylinder 5, the spraying pipes 9 are pipelines with one sealed ends, spraying nozzles uniformly distributed in a straight line direction are installed on the outer side walls of the pipelines, and the other ends of the spraying pipes 9 are connected with spraying equipment through pipes (the spraying equipment adopts the prior art);
angle actuating mechanism's output shaft has the dwang 11 of rotation connection on mount 6, the cross-section of dwang 11 is the T type, the one end of dwang 11 is passed mount 6 and is slided and cup jointed activity ring 17, be equipped with between activity ring 17 and the mount 6 and cup joint spring 16 on dwang 11, telescopic link 19 that the output shaft is located activity ring 17 one side is installed to the one end of dwang 11, five array arrangement's apron 3 is installed through a plurality of connecting pieces 18 in the outside of activity ring 17, it is connected with axis of rotation 23 to run through on the apron 3, the one end of axis of rotation 23 is connected with link 22, evenly install a plurality of dead levers 25 on link 22's the annular edge, movable mounting has centre gripping frame 26 on the dead lever 25, slewing mechanism is installed to the other end of axis of rotation 23.
The rotating mechanism comprises a second transmission gear 24 fixedly connected to the other end of the first rotating shaft 23, one side of each of the first spraying cylinder 2, the first drying cylinder 4, the second spraying cylinder 5 and the second drying cylinder 7 is provided with a second motor 20 installed on the extending part of the fixed frame 6, and the output shaft of the second motor 20 is connected with a first transmission gear 21 movably meshed with the second transmission gear 24.
The angle driving mechanism comprises a first motor 15 installed on the fixing frame 6, an output shaft of the first motor 15 is connected with a swing arm 14 with an L-shaped cross section, a transmission disc 13 is installed at one end of the rotating rod 11, five transmission grooves 1301 arranged in an annular array are formed in the transmission disc 13, one end of the swing arm 14 is connected with the transmission grooves 1301 in a sliding mode, the angle driving mechanism is arranged, under the action of the first motor 15, each circle of rotation of the output shaft of the first motor 15 can drive the rotating rod 11 to rotate 72 degrees, and station conversion is achieved.
The cross-section of dead lever 25 is the L type, rotates on the one end lateral wall of dead lever 25 to be connected with axis of rotation two 28, and drive gear three 27 is installed to the one end of axis of rotation two 28, and centre gripping frame 26 is installed to the other end of axis of rotation two 28, all install the ring gear 12 on the inside lateral wall of first spraying section of thick bamboo 2, first drying cylinder 4, second spraying section of thick bamboo 5, second drying cylinder 7, drive gear three 27 and ring gear 12 swing joint can be when centre gripping spraying piece revolution on drive link 2, can also drive the rotation of centre gripping spraying piece on the link 2, improve the spraying homogeneity, the spraying is effectual.
The one end cross-section of dwang 11 is the rectangle, can guarantee the stability of being connected between dwang 11 and the activity ring 17, and activity ring 17 can only be on the dwang 11 side-to-side movement, and the dwang 11 is circular with the junction one end cross-section of mount 6.
When in use: fixing a plurality of automotive interior parts to be sprayed in a plurality of clamping frames 26 on a cover plate 3, then driving a movable ring 17 to move towards one side by an output shaft of a telescopic rod 19, compressing a spring 16, driving the plurality of cover plates 3 to move towards one side by the movable ring 17 through a connecting piece 18, driving parts and automotive interior parts clamped and fixed on the parts by the cover plates 3 to move into a first spraying cylinder 2, a first drying cylinder 4, a second spraying cylinder 5 and a second drying cylinder 7, meshing a transmission gear II 24 on one side of the cover plate 3 with a corresponding transmission gear I21 during movement, and after the clamping frame 26 moves into the first spraying cylinder 2, the first drying cylinder 4, the second spraying cylinder 5 and the second drying cylinder 7, meshing a transmission gear III 27 connected with a rotating shaft II 28 on the clamping frame 26 with a gear ring 12 in the cylinder, and then starting a spraying pipe 9 in the first spraying cylinder 2 to spray the automotive interior parts inside, during spraying, the output shaft of the second motor 20 drives the second transmission gear 24 to rotate through the first transmission gear 21, the second transmission gear 24 drives the connecting frame 22 to rotate through the first rotation shaft 23, so that the clamping frame 26 and the automotive interior part on the second transmission gear are driven to revolve, and during revolution, the third transmission gear 27 is meshed with the toothed ring 12, so that the clamping frame 26 and the automotive interior part on the clamping frame are driven to rotate around the fixing rod 25, and the automotive interior part is sprayed uniformly and is good in spraying effect;
after the primary spraying is finished, the output shaft of the telescopic rod 19 returns to the original position, the movable ring 17 returns to the original position under the elastic force action of the spring 16, and then the cover plates 3 and other parts on the cover plates are driven to move out of the primary spraying barrel through the connecting piece 18;
an output shaft of the first motor 15 drives the swing arm 14 to rotate, the swing arm 14 is in sliding connection with the transmission groove 1301 on the transmission disc 13 to drive the transmission disc 13 to rotate for 72 degrees, and the automotive interior part after the first spraying moves to the position on one side of the first drying cylinder 4;
an output shaft of the telescopic rod 19 drives the movable ring 17 to move towards one side, the spring 16 is compressed, the movable ring 17 drives the cover plates 3 to move towards one side through the connecting piece 18, the cover plates 3 drive the automobile interior trim parts after the first spraying to move into the first drying cylinder 4, the fan and the heating pipe 10 are started, and the automobile interior trim parts after the first spraying are dried;
after primary drying is finished, the output shaft of the telescopic rod 19 returns to the original position, the movable ring 17 returns to the original position under the elastic force action of the spring 16, and then the cover plates 3 and other parts on the cover plates are driven by the connecting piece 18 to move out of the spraying cylinder or the drying cylinder;
an output shaft of the first motor 15 drives the swing arm 14 to rotate, the swing arm 14 is in sliding connection with the transmission groove 1301 on the transmission disc 13 to drive the transmission disc 13 to rotate for 72 degrees, and the automotive interior part after the first spraying moves to the position on one side of the first drying cylinder 4;
an output shaft of the telescopic rod 19 drives the movable ring 17 to move towards one side, the spring 16 is compressed, the movable ring 17 drives the cover plates 3 to move towards one side through the connecting piece 18, the cover plates 3 drive the automobile interior trim parts dried for the first time to move into the second spraying cylinder 5, the spraying pipes 9 in the second spraying cylinder 5 spray the automobile interior trim parts again, and the automobile interior trim parts revolve and rotate in the same way as the above during spraying, so that the paint spraying effect is improved;
after the secondary spraying is finished, the output shaft of the telescopic rod 19 returns to the original position, the movable ring 17 returns to the original position under the elastic force action of the spring 16, and then the cover plates 3 and other parts on the cover plates are driven to move out of the secondary spraying cylinder through the connecting piece 18;
an output shaft of the first motor 15 drives the swing arm 14 to rotate, the swing arm 14 is in sliding connection with the transmission groove 1301 on the transmission disc 13 to drive the transmission disc 13 to rotate for 72 degrees, and the automotive interior part after being sprayed for the first time moves to the position on one side of the second drying cylinder 7;
an output shaft of the telescopic rod 19 drives the movable ring 17 to move towards one side, the spring 16 is compressed, the movable ring 17 drives the cover plates 3 to move towards one side through the connecting piece 18, the cover plates 3 drive the automobile interior trim parts after the first spraying to move into the second drying cylinder 7, the fan and the heating pipe 10 are started, and the automobile interior trim parts after the second spraying are dried;
after the secondary drying is finished, the output shaft of the telescopic rod 19 returns to the original position, the movable ring 17 returns to the original position under the elastic force action of the spring 16, and then the cover plates 3 and other components on the cover plates are driven by the connecting piece 18 to move out of the second drying cylinder 7;
an output shaft of the first motor 15 drives the swing arm 14 to rotate, the swing arm 14 is in sliding connection with the transmission groove 1301 in the transmission disc 13 to drive the transmission disc 13 to rotate for 72 degrees, the automobile interior trim part after secondary drying moves to the feeding and discharging station 8, the sprayed automobile interior trim part is discharged, then the automobile interior trim part needing spraying is installed again, and the operation is carried out in a reciprocating mode.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The spraying device for processing the automotive interior comprises a support frame (1) and a fixing frame (6), and is characterized in that a first spraying cylinder (2), a first drying cylinder (4), a second spraying cylinder (5), a second drying cylinder (7) and a feeding and discharging station (8) which are arranged in an annular array are arranged on the fixing frame (6), the feeding and discharging station (8) is located at the lowest part, the first spraying cylinder (2) and the second drying cylinder (7) are arranged on the support frame (1), spraying pipes (9) are arranged inside the first spraying cylinder (2) and the second spraying cylinder (5), heating pipes (10) are arranged inside the first drying cylinder (4) and the second drying cylinder (7), and an angle driving mechanism is arranged at one end of the fixing frame (6);
an output shaft of the angle driving mechanism is connected with a rotating rod (11) which is rotatably connected to the fixed frame (6), the cross section of the rotating rod (11) is T-shaped, one end of the rotating rod (11) penetrates through the fixed frame (6) and is slidably sleeved with a movable ring (17), a spring (16) which is sleeved on the rotating rod (11) is arranged between the movable ring (17) and the fixed frame (6), a telescopic rod (19) of which the output shaft is positioned on one side of the movable ring (17) is installed at one end of the rotating rod (11), five cover plates (3) which are arranged in an array are installed outside the movable ring (17) through a plurality of connecting pieces (18), a rotating shaft I (23) is rotatably connected on each cover plate (3) in a penetrating way, one end of each rotating shaft I (23) is connected with a connecting frame (22), a plurality of fixing rods (25) are uniformly installed on the annular edge of each connecting frame (22), and a clamping frame (26) is movably installed on each fixing rod (25), and the other end of the first rotating shaft (23) is provided with a rotating mechanism.
2. The spraying device for processing the automotive interior according to claim 1, wherein the rotating mechanism comprises a second transmission gear (24) fixedly connected to the other end of the first rotating shaft (23), one side of each of the first spraying cylinder (2), the first drying cylinder (4), the second spraying cylinder (5) and the second drying cylinder (7) is provided with a second motor (20) installed on an extension part of the fixing frame (6), and an output shaft of the second motor (20) is connected with a first transmission gear (21) movably meshed with the second transmission gear (24).
3. The spraying device for processing the automotive interior according to claim 1, wherein the angle driving mechanism comprises a first motor (15) installed on the fixing frame (6), an output shaft of the first motor (15) is connected with a swing arm (14) with an L-shaped cross section, a transmission disc (13) is installed at one end of the rotating rod (11), five transmission grooves (1301) arranged in an annular array are formed in the transmission disc (13), and one end of the swing arm (14) is slidably connected with the transmission grooves (1301).
4. The spraying device for processing the automotive interior according to claim 1, wherein the cross section of the fixing rod (25) is L-shaped, a second rotating shaft (28) is rotatably connected to one side wall of one end of the fixing rod (25), a third transmission gear (27) is installed at one end of the second rotating shaft (28), a clamping frame (26) is installed at the other end of the second rotating shaft (28), toothed rings (12) are installed on one side wall of the first spraying cylinder (2), the first drying cylinder (4), the second spraying cylinder (5) and the second drying cylinder (7), and the third transmission gear (27) is movably engaged with the toothed rings (12).
5. The spraying device for processing the automotive interior according to claim 1, wherein the spraying pipe (9) is a pipeline with one sealed end, the outer side wall of the pipeline is provided with paint spraying nozzles uniformly distributed along a straight line, and the other end of the spraying pipe (9) is connected with a paint spraying device through a conduit.
6. The spraying device for processing the automotive interior according to claim 1, wherein the heating pipe (10) is an electric heating pipe, and a cylindrical protective net is mounted on the outside of the heating pipe (10).
7. The spraying device for processing the automotive interior according to claim 6, wherein a plurality of air outlet holes are formed at the top ends of the first drying cylinder (4) and the second drying cylinder (7), and a fan communicated with the outside is installed at one end of the protective net.
8. The spraying device for processing the automotive interior according to claim 1, wherein the section of one end of the rotating rod (11) is rectangular, and the section of one end of the connecting part of the rotating rod (11) and the fixing frame (6) is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110806129.1A CN113318887A (en) | 2021-07-16 | 2021-07-16 | Spraying device for processing automotive interior |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110806129.1A CN113318887A (en) | 2021-07-16 | 2021-07-16 | Spraying device for processing automotive interior |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113318887A true CN113318887A (en) | 2021-08-31 |
Family
ID=77426349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110806129.1A Pending CN113318887A (en) | 2021-07-16 | 2021-07-16 | Spraying device for processing automotive interior |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113318887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155908A (en) * | 2022-06-21 | 2022-10-11 | 中电环宇（北京）建设工程有限公司 | Steel structure surface spraying device and method |
-
2021
- 2021-07-16 CN CN202110806129.1A patent/CN113318887A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155908A (en) * | 2022-06-21 | 2022-10-11 | 中电环宇（北京）建设工程有限公司 | Steel structure surface spraying device and method |
| CN115155908B (en) * | 2022-06-21 | 2024-01-30 | 中电环宇（北京）建设工程有限公司 | Steel structure surface spraying device and method |
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