A surface spraying equipment for civil air defense doors

Abstract

The present invention discloses a surface spraying equipment for a civil air defense door, which belongs to the technical field of civil air defense door processing, and comprises a first conveying device, a second conveying device, a spraying device, an oven and a flipping device. The first conveying device and the second conveying device are arranged side by side, and the two convey the civil air defense door in opposite directions. The first conveying device and the second conveying device have the same structure, and the first conveying device comprises a frame, a first conveying roller and a first power member. A plurality of first conveying rollers are arranged, and are rotatably arranged on the frame at equal intervals. The present invention utilizes the first conveying device, the second conveying device and the flipping device to flip the civil air defense door for transportation, and under the spraying action of the spraying device, the civil air defense door can be sprayed on both sides, and the first nozzle and the second nozzle can be rotated 90° under the drive of the first driving component, and the surrounding sides of the civil air defense door can be sprayed, so that all-round spraying can be achieved.

Description

Technical Field

[0001] The invention discloses a surface spraying device for a civil air defense door, belonging to the technical field of civil air defense door processing. Background Art

[0002] Civil defense doors are the doors at the entrances and exits of people's defense projects. There are distinct classifications of civil defense doors, including ordinary single-leaf and double-leaf protective closed doors and closed doors, movable threshold single-leaf and double-leaf protective closed doors and closed doors, and other civil defense equipment. After the civil defense doors are assembled, they need to be sprayed with fire retardant paint and other protective paints.

[0003] The patent with announcement number CN112264236B discloses an automatic spraying equipment for civil air defense doors, including an intermittent conveying device, a spraying and conveying device, an automatic spraying device, a spraying, baking and air-drying device, a conveying mechanism bracket, a civil air defense door to be sprayed, a spraying and conveying pillar, and a spraying and conveying fixed platform.

[0004] Although the above patent uses an intermittent conveying device to convey the painted civil air defense door to the bottom of the tidal flat handling and conveying device, and automatically moves the civil air defense door to the front of the automatic spraying device, the automatic spraying methods on both sides are from top to bottom and from left to right, respectively, and the front and back sides are sprayed. However, during the double-sided spraying of the civil air defense door, the civil air defense door is placed vertically on the moving conveying wheel, and its upper end is clamped by the moving fixed frame, so that when the automatic spraying device is spraying, the position of the civil air defense door corresponding to the moving fixed frame cannot be sprayed, and the surrounding sides of the civil air defense door cannot be sprayed in all directions, resulting in the need for manual secondary spraying of the position later. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to provide a surface spraying device for a civil air defense door.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a surface spraying equipment for a civil air defense door, comprising a first conveying device, a second conveying device, a spraying device, an oven and a turning device. The first conveying device and the second conveying device are arranged side by side, and the two convey the civil air defense door in opposite directions. The first conveying device and the second conveying device have the same structure, and the first conveying device comprises a frame, a first conveying roller and a first power member. A plurality of first conveying rollers are provided and are rotatably arranged on the frame at equal intervals. The first power member is provided on the frame and drives all the first conveying rollers to rotate in the same direction. The oven is provided on the frame. The spraying device is provided in the oven and is located at the front side of the conveying direction of the oven. The spraying device comprises a concave frame, a first nozzle, a second nozzle and a first driving assembly. A plurality of first nozzles are provided and are installed on the concave frame in a manner parallel to the first conveying roller. Two second nozzles are provided and are installed on both sides of the concave frame corresponding to the first nozzle. The first nozzle and The spraying direction of the second nozzle is set vertically, the first driving assembly is installed on the frame and is used to drive the concave frame to rotate 90°, the rotation axis of the concave frame is coaxially arranged with the axis of the second nozzle, a feed pipe connected with the first nozzle and the second nozzle is provided on one side of the concave frame, and one end of the feed pipe extends to the outside of the frame, the flipping device includes a fixed frame, a mounting platform, a flap, a second driving assembly and a third driving assembly, the mounting platform and the fixed frame are located on one side of the first conveying device and the second conveying device, a rotating shaft is provided at one end of the flap, and the rotating shaft is rotatably connected to the mounting platform, a cavity for accommodating a civil defense door is provided on the flap, and the opening of the cavity is arranged toward the first conveying device or the second conveying device, the second driving assembly is installed on the fixed frame, and is used to drive the flap to flip 180° with the rotating shaft as the center, the third driving assembly is installed on the flap and the mounting platform, and is used to drive the civil defense door to enter or exit the cavity, and a pair of roller conveying devices is also provided on the side of the frame close to the mounting platform.

[0007] Preferably, a flow hole is provided in the concave frame, and the flow hole is connected with the first nozzle, the second nozzle and the feed pipe. First transmission shafts are provided on both sides of the concave frame, the first transmission shaft is coaxially arranged with the second nozzle, and the first transmission shaft is rotatably connected with the frame. One-way flow guides are provided in the first nozzle and the second nozzle, and the one-way flow guides include a sealing head and a spring. A plurality of mounting tubes are provided on the concave frame, and the first nozzle and the second nozzle are threadedly mounted on the mounting tube. The sealing head and the spring are located in the mounting tube, and the spring applies a force to the sealing head to seal the mounting tube. The frame has an arc groove for the feed tube to slide.

[0008] Preferably, the first driving assembly includes a first motor, a first driving gear and a first driven gear, a bracket is provided on the frame, the first motor is fixed on the bracket, the first driving gear is fixed on the output shaft of the first motor, and the first driven gear is fixed on the first transmission shaft and meshes with the first driving gear for transmission.

[0009] Preferably, the first power member includes a second motor, a second driving gear and a second driven gear, the output shaft of the second motor is fixedly connected to one end of one of the first conveying rollers, the second driving gear and the second driven gear are both provided in plurality, the second driving gear is fixed on the first conveying roller, the second driven gear is rotatably mounted on the frame via a fixed shaft, and the second driven gear is meshed with the second driving gear for transmission.

[0010] Preferably, the pair of roller conveying device includes a third driving gear, a third driven gear and two second conveying rollers, the two second conveying rollers are distributed up and down and are rotatably installed on the frame, the third driving gear and the third driven gear are respectively fixed on the two second conveying rollers, and the third driving gear is meshed with the second driven gear for transmission, and a second driving gear is also provided on one of the second conveying rollers.

[0011] Preferably, the second driving assembly includes a third motor, a screw, a sliding seat, a fourth motor, a pull rope and a winding wheel. The screw is rotatably installed on the upper end of the fixing frame, the output shaft of the third motor is fixedly connected to one end of the screw, the sliding seat is slidably set on the fixing frame, and the sliding seat is threadedly connected to the screw, the fourth motor, pull rope and winding wheel are each provided in two groups, fastening bolts are provided on both sides of one end of the flap, a rotating sleeve is provided on the fastening bolt, one end of the pull rope is fixedly connected to the rotating sleeve, and the other end is wound on the winding wheel, the winding wheel is fixed on the output shaft of the fourth motor, and the fourth motor is installed on the sliding seat.

[0012] Preferably, the third driving assembly includes a sliding rod, a magnet and a second power member, a mounting column is provided on the side of the flap away from the first conveying device and the second conveying device, the sliding rod is slidably arranged in the mounting column, and one end of the sliding rod passes through the flap and extends into the cavity, the magnet is fixed on the sliding rod, and the magnet is located in the cavity, the sliding rod, the magnet and the mounting column are each provided in two groups, and the second power member is provided in two groups, and drives the sliding rod to slide back and forth horizontally.

[0013] Preferably, the second power member includes a fifth motor, a second transmission shaft and a fourth driving gear, two fourth driving gears are provided and fixed on the second transmission shaft, a fixing block for installing the second transmission shaft is provided on the mounting table, the output shaft of the fifth motor is fixedly connected to the second transmission shaft, two groups of the second power members are respectively arranged side by side with the first conveying device and the second conveying device, a plurality of annular tooth grooves distributed at equal intervals are provided on the sliding rod, a through groove is provided on the mounting column, and the sliding rod is meshed with the fourth driving gear for transmission through the annular tooth groove.

[0014] Preferably, the oven includes a baffle, a first fan and a heating tube, the first fan and the heating tube are both located in the baffle, the first fan is located above the heating tube, negative pressure devices are provided on both sides of the oven, the negative pressure device includes a drainage hood and a second fan, a drainage port is provided below the drainage hood, the second fan is located above the drainage hood, a reflux chamber is provided above the baffle, and the reflux chamber is connected to the inner cavity of the drainage hood.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting up a first conveying device, a second conveying device and a flipping device, the civil air defense door is first sprayed under the conveyance of the first conveying device, and the spraying of one surface and three sides can be completed. After drying, the civil air defense door enters the flap and flips 180° under the drive of the second driving component. The third driving component pushes the civil air defense door into the second conveying device, and is transported by the second conveying device, and undergoes a second spraying to complete the spraying of another surface and another side. In this way, all-round spraying can be achieved, and automatic control can be achieved, thereby greatly improving the spraying efficiency of the civil air defense door and reducing the labor intensity of workers' manual spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a surface spraying device for a civil air defense door according to the present invention;

[0018] Figure 2 It is a schematic structural diagram of the first conveying device and the roller conveying device in the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the first conveying device and the spraying device in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the spraying device in the present invention;

[0021] Figure 5 Schematic diagram of the internal structure of the spraying device in the present invention;

[0022] Figure 6for Figure 5 A magnified view of the area at center A;

[0023] Figure 7 It is a schematic diagram of the structure of the flap and the third driving assembly in the present invention;

[0024] Figure 8 It is a schematic structural diagram of the second power member and the sliding rod in the present invention;

[0025] Figure numerals: 1, civil air defense door; 2, first conveying device; 3, negative pressure device; 4, oven; 5, fixed frame; 6, screw; 7, third drive assembly; 8, mounting table; 9, fourth motor; 10, sliding seat; 11, second drive assembly; 12, third motor; 13, winding wheel; 14, pull rope; 15, third driven gear; 16, third driving gear; 17, first drive assembly; 18, second conveying device; 19, second motor; 20, first conveying roller; 21, second driving gear; 22, second driven gear; 23, fixed shaft; 24, arc groove; 25, frame; 26, second conveying roller; 27, roller conveying device; 28, drainage hood; 29, Spraying device; 30, first fan; 31, heating tube; 32, baffle; 33, second fan; 34, first transmission shaft; 35, first driving gear; 36, first motor; 37, first driven gear; 38, feed pipe; 39, first nozzle; 40, concave frame; 41, mounting tube; 42, second nozzle; 43, flow hole; 44, spring; 45, sealing head; 46, fixing block; 47, fourth driving gear; 48, second transmission shaft; 49, fifth motor; 50, mounting column; 51, rotating sleeve; 52, fastening bolt; 53, cavity; 54, rotating shaft; 55, flap; 56, sliding rod; 57, annular tooth groove; 58, magnet; 59, through groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 8As shown, a surface spraying device for a civil air defense door comprises a first conveying device 2, a second conveying device 18, a spraying device 29, an oven 4 and a turning device. The first conveying device 2 and the second conveying device 18 are arranged side by side, and the two convey the civil air defense door 1 in opposite directions. The first conveying device 2 and the second conveying device 18 have the same structure, and the first conveying device 2 comprises a frame 25, a first conveying roller 20 and a first power member. A plurality of first conveying rollers 20 are arranged and are rotatably arranged on the frame 25 at equal intervals. The first power member is arranged on the frame 25 and drives All first conveying rollers 20 rotate in the same direction, the oven 4 is arranged on the frame 25, the spraying device 29 is arranged in the oven 4 and is located at the front side of the conveying direction of the oven 4, the spraying device 29 includes a concave frame 40, a first nozzle 39, a second nozzle 42 and a first driving assembly 17, a plurality of first nozzles 39 are arranged, and are installed on the concave frame 40 in a manner parallel to the first conveying rollers 20, two second nozzles 42 are arranged, and are installed on both sides of the concave frame 40 corresponding to the first nozzles 39, and the spraying directions of the first nozzles 39 and the second nozzles 42 are perpendicular to each other. The first driving assembly 17 is installed on the frame 25 and is used to drive the concave frame 40 to rotate 90 degrees. The rotation axis of the concave frame 40 is coaxially arranged with the axis of the second nozzle 42. A feeding pipe 38 connected with the first nozzle 39 and the second nozzle 42 is arranged on one side of the concave frame 40. One end of the feeding pipe 38 extends to the outside of the frame 25. The flipping device includes a fixed frame 5, a mounting platform 8, a flap 55, a second driving assembly 11 and a third driving assembly 7. The mounting platform 8 and the fixed frame 5 are located on one side of the first conveying device 2 and the second conveying device 18. A rotating shaft 54 ​​is provided at one end of the plate 55, and the rotating shaft 54 ​​is rotatably connected to the mounting platform 8. A cavity 53 for accommodating the civil defense door 1 is provided on the flap 55, and the opening of the cavity 53 is arranged toward the first conveying device 2 or the second conveying device 18. The second drive component 11 is installed on the fixed frame 5, and is used to drive the flap 55 to flip 180° around the rotating shaft 54. The third drive component 7 is installed on the flap 55 and the mounting platform 8, and is used to drive the civil defense door 1 to enter or exit the cavity 53. A pair of roller conveying devices 27 are also provided on the side of the frame 25 close to the mounting platform 8.

[0028] A flow hole 43 is provided in the concave frame 40, and the flow hole 43 is connected to the first nozzle 39, the second nozzle 42 and the feed pipe 38. The first transmission shaft 34 is provided on both sides of the concave frame 40, and the first transmission shaft 34 is coaxially arranged with the second nozzle 42, and the first transmission shaft 34 is rotatably connected with the frame 25. A one-way flow guide is provided in the first nozzle 39 and the second nozzle 42, and the one-way flow guide includes a sealing head 45 and a spring 44. A plurality of mounting tubes 41 are provided on the concave frame 40, and the first nozzle 39 and the second nozzle 42 are threadedly mounted on the mounting tube 41. The sealing head 45 and the spring 44 are located in the mounting tube 41, and the spring 44 applies a force to the sealing head 45 to block the mounting tube 41. The frame 25 has an arc groove 24 for the feed pipe 38 to slide. The driving component 17 includes a first motor 36, a first driving gear 35 and a first driven gear 37. A bracket is provided on the frame 25. The first motor 36 is fixed on the bracket. The first driving gear 35 is fixed on the output shaft of the first motor 36. The first driven gear 37 is fixed on the first transmission shaft 34 and meshes with the first driving gear 35 for transmission. The feed pipe 38 can deliver liquid coating to the flow hole 43 at a certain pressure, and after overcoming the elastic force of the spring 44, it is sprayed out from the first nozzle 39 and the second nozzle 42. The first motor 36 can drive the concave frame 40 to rotate 90°, so that the first nozzle 39 can be rotated to a position flush with the civil defense door 1 or above the civil defense door 1, so that the side and upper and lower surfaces of the civil defense door 1 can be sprayed.

[0029] The first power member includes a second motor 19, a second driving gear 21 and a second driven gear 22. The output shaft of the second motor 19 is fixedly connected to one end of one of the first conveying rollers 20. A plurality of second driving gears 21 and second driven gears 22 are provided. The second driving gear 21 is fixed on the first conveying roller 20. The second driven gear 22 is rotatably mounted on the frame 25 through a fixed shaft 23. The second driven gear 22 is meshed with the second driving gear 21 for transmission. The second motor 19 drives the first conveying roller 20 to rotate. At the same time, relying on the meshing of the second driving gear 21 and the second driven gear 22, all the first conveying rollers 20 rotate in the same direction, so that the civil defense door 1 can be smoothly driven to be transported in one direction.

[0030] The roller conveying device 27 includes a third driving gear 16, a third driven gear 15 and two second conveying rollers 26. The two second conveying rollers 26 are distributed up and down and are rotatably installed on the frame 25. The third driving gear 16 and the third driven gear 15 are respectively fixed on the two second conveying rollers 26, and the third driving gear 16 is meshed with the second driven gear 22 for transmission. A second driving gear 21 is also provided on one of the second conveying rollers 26. The power for the rotation of the two second conveying rollers 26 comes from the second driving gear 21 and the second driven gear 22, and the meshing of the third driving gear 16 and the third driven gear 15 can allow the two second conveying rollers 26 to rotate in opposite directions, so that the two second conveying rollers 26 have a clamping and conveying effect on the civil defense door 1, and allow it to smoothly enter or exit the flipping device.

[0031] The second driving assembly 11 includes a third motor 12, a screw rod 6, a sliding seat 10, a fourth motor 9, a pull rope 14 and a winding wheel 13. The screw rod 6 is rotatably installed on the upper end of the fixed frame 5. The output shaft of the third motor 12 is fixedly connected to one end of the screw rod 6. The sliding seat 10 is slidably set on the fixed frame 5, and the sliding seat 10 is threadedly connected to the screw 6. The fourth motor 9, the pull rope 14 and the winding wheel 13 are each provided with two groups. Fastening bolts 52 are provided on both sides of one end of the flap 55. A rotating sleeve 51 is provided on the fastening bolt 52. One end of the pull rope 14 is fixedly connected to the rotating sleeve 51, and the other end is wound on the winding wheel 13. The winding wheel 13 is fixed on the output shaft of the fourth motor 9. The fourth motor 9 is installed on the sliding seat 10. When the civil air defense door 1 enters the cavity 53, the fourth motor 9 drives the winding wheel 13 to rotate to reel in the pull rope 14. At the same time, the third motor 12 drives the screw 6 to rotate, and keeps the sliding seat 10 and the winding wheel 13 moving horizontally. In this way, one end of the flap 55 can be lifted by the pull rope 14. After the flap 55 flips 90°, the fourth motor 9 drives the winding wheel 13 to rotate in the opposite direction, thereby unwinding the pull rope 14, so that the flap 55 slowly descends. In this way, the flap 55 can be flipped 180°, so that the flap 55 can drive the civil air defense door 1 to flip over and prepare for double-sided spraying of the civil air defense door 1.

[0032] The third driving assembly 7 includes a sliding rod 56, a magnet 58 and a second power member. A mounting column 50 is provided on the side of the flap 55 away from the first conveying device 2 and the second conveying device 18. The sliding rod 56 is slidably arranged in the mounting column 50, and one end of the sliding rod 56 passes through the flap 55 and extends into the cavity 53. The magnet 58 is fixed on the sliding rod 56, and the magnet 58 is located in the cavity 53. The sliding rod 56, the magnet 58 and the mounting column 50 are each provided with two groups. The second power member is provided with two groups and drives the sliding rod 56 to slide horizontally back and forth. The second power member includes a fifth motor 49, a second transmission shaft 48 and a fourth driving gear 47. Two fourth driving gears 47 are provided and fixed on the second transmission shaft 48. A fixing block 46 for mounting the second transmission shaft 48 is provided on the mounting table 8. The output shaft of the fifth motor 49 is fixedly connected to the second transmission shaft 48 Then, the two groups of second power parts are arranged side by side with the first conveying device 2 and the second conveying device 18 respectively, and a plurality of equally spaced annular tooth grooves 57 are arranged on the sliding rod 56, and a through groove 59 is arranged on the mounting column 50. The sliding rod 56 is meshed with the fourth driving gear 47 through the annular tooth groove 57 for transmission, and the fifth motor 49 drives the fourth driving gear 47 to rotate forward and reversely. The sliding rod 56 meshes with the fourth driving gear 47 by relying on the annular tooth groove 57, and allows the sliding rod 56 to slide in the mounting column 50, thereby driving the magnet 58 to move synchronously. The magnet 58 can generate suction on the civil defense door 1 and can smoothly pull the civil defense door 1 from the first conveying device 2 into the cavity 53, and the sliding rod 56 can push the civil defense door 1 from the cavity 53 to the second conveying device 18 when sliding in the reverse direction, wherein the traction force of the roller conveying device 27 on the civil defense door 1 is greater than the ferromagnetic suction force.

[0033] The oven 4 includes a baffle 32, a first fan 30 and a heating tube 31. The first fan 30 and the heating tube 31 are both located in the baffle 32. The first fan 30 is located above the heating tube 31. Negative pressure devices 3 are arranged on both sides of the oven 4. The negative pressure device 3 includes a drainage hood 28 and a second fan 33. A drainage port is arranged below the drainage hood 28. The second fan 33 is located above the drainage hood 28. A reflux chamber is arranged above the baffle 32. The reflux chamber is connected to the inner cavity of the drainage hood 28. The first fan 30 can generate heat from the heating tube 31 and blow it toward the surface of the civil defense door 1, while the negative pressure device 3 generates a negative pressure effect on both sides of the oven 4 to suck the atomized or volatilized paint into the drainage hood 28 and then enter the reflux chamber, thereby realizing internal circulation. The air circulates and can achieve energy-saving effects. An adsorption device can be added to the oven 4 to centrally process the volatilized paint.

[0034] Working principle: First, place the civil air defense door 1 on the first conveying device 2, and start to convey it to the oven 4 under the action of the first conveying device 2. When the civil air defense door 1 enters the oven 4 and one end thereof reaches a position close to the spraying device 29, the first driving assembly 17 drives the concave frame 40 to rotate 90°, so that the first spray head 39 rotates to a position flush with the civil air defense door 1, and sprays the first side of the civil air defense door 1. After the spraying is completed, the concave frame 40 is reset. Then, during the conveying process of the civil air defense door 1, the first spray head and the second spray head 42 spray the first surface and two side surfaces of the civil air defense door 1. The civil air defense door 1 is coated and then dried in the oven 4. After drying, the civil air defense door 1 is conveyed to the cavity 53 of the flap 55 by the roller conveyor 27 and the third drive assembly 7, and the flap 55 and the civil air defense door 1 are turned 180° by the second drive assembly 11. Then, the civil air defense door 1 is pushed out of the cavity 53 and enters the second conveyor 18 under the drive of the roller conveyor 27 and the third drive assembly 7. The other surface and the last side of the civil air defense door 1 can be sprayed and dried by using the spraying device 29 and the oven 4. The use of this equipment can achieve an all-round spraying effect on the civil air defense door 1.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A surface spraying device for a civil air defense door, comprising a first conveying device (2), a second conveying device (18), a spraying device (29), an oven (4) and a turning device, characterized in that: The first conveying device (2) and the second conveying device (18) are arranged side by side, and the two convey the civil air defense door (1) in opposite directions. The first conveying device (2) and the second conveying device (18) have the same structure, and the first conveying device (2) includes a frame (25), a first conveying roller (20) and a first power member. A plurality of first conveying rollers (20) are arranged and are rotatably arranged on the frame (25) at equal intervals. The first power member is arranged on the frame (25) and drives all the first conveying rollers (20) to rotate in the same direction. The oven (4) is arranged on the frame (25). The spraying device (29) is arranged in the oven (4) and is located at the front side of the oven (4) in the conveying direction. The spraying device (2 9) comprises a concave frame (40), a first spray head (39), a second spray head (42) and a first driving assembly (17), wherein a plurality of the first spray heads (39) are provided and are installed on the concave frame (40) in a manner parallel to the first conveying roller (20), two second spray heads (42) are provided and are installed on both sides of the concave frame (40) corresponding to the first spray head (39), the spraying directions of the first spray head (39) and the second spray head (42) are arranged vertically, the first driving assembly (17) is installed on the frame (25) and is used to drive the concave frame (40) to rotate 90 degrees, the rotation axis of the concave frame (40) is coaxial with the axis of the second spray head (42), and one side of the concave frame (40) is provided with a A feed pipe (38) is connected to the first nozzle (39) and the second nozzle (42), one end of the feed pipe (38) extends to the outside of the frame (25), the turning device comprises a fixed frame (5), a mounting platform (8), a flap (55), a second drive assembly (11) and a third drive assembly (7), the mounting platform (8) and the fixed frame (5) are located on one side of the first conveying device (2) and the second conveying device (18), one end of the flap (55) is provided with a rotating shaft (54), the rotating shaft (54) is rotatably connected to the mounting platform (8), the flap (55) is provided with a cavity (53) for accommodating the civil air defense door (1), the opening of the cavity (53) is arranged toward the first conveying device (2) or the second conveying device (18), The second driving assembly (11) is mounted on the fixing frame (5) and is used to drive the flap (55) to flip 180 degrees around the rotating shaft (54). The third driving assembly (7) is mounted on the flap (55) and the mounting platform (8) and is used to drive the civil air defense door (1) to enter or exit the cavity (53). A roller conveying device (27) is also provided on the side of the frame (25) close to the mounting platform (8). A flow hole (43) is provided in the concave frame (40). The flow hole (43) is connected to the first nozzle (39), the second nozzle (42) and the feed pipe (38). First transmission shafts (34) are provided on both sides of the concave frame (40). The first transmission shaft (34) is coaxially arranged with the second nozzle (42).The first transmission shaft (34) is rotatably connected to the frame (25); a one-way flow guide is provided inside the first nozzle (39) and the second nozzle (42); the one-way flow guide includes a sealing head (45) and a spring (44); a plurality of mounting tubes (41) are provided on the concave frame (40); the first nozzle (39) and the second nozzle (42) are threadedly mounted on the mounting tube (41); the sealing head (45) and the spring (44) are located inside the mounting tube (41); the spring (44) applies a force to the sealing head (45) to block the mounting tube (41); the frame (25) has an arc groove (24) for the feed tube (38) to slide; the first driving assembly (17) drives the concave frame (40) to rotate 90 degrees, so that the first nozzle (39) can rotate to a position flush with the civil air defense door (1) or above the civil air defense door (1).

2. The surface spraying equipment for civil air defense door according to claim 1 is characterized in that: The first driving assembly (17) comprises a first motor (36), a first driving gear (35) and a first driven gear (37); a bracket is provided on the frame (25); the first motor (36) is fixed on the bracket; the first driving gear (35) is fixed on an output shaft of the first motor (36); and the first driven gear (37) is fixed on a first transmission shaft (34) and meshes with the first driving gear (35) for transmission.

3. The surface spraying equipment for civil air defense door according to claim 1 is characterized in that: The first power member comprises a second motor (19), a second driving gear (21) and a second driven gear (22); the output shaft of the second motor (19) is fixedly connected to one end of one of the first conveying rollers (20); a plurality of the second driving gear (21) and the second driven gear (22) are provided; the second driving gear (21) is fixed to the first conveying roller (20); the second driven gear (22) is rotatably mounted on the frame (25) via a fixed shaft (23); and the second driven gear (22) is meshed with the second driving gear (21) for transmission.

4. The surface spraying equipment for civil air defense door according to claim 3 is characterized in that: The roller conveying device (27) comprises a third driving gear (16), a third driven gear (15) and two second conveying rollers (26). The two second conveying rollers (26) are arranged vertically and rotatably mounted on the frame (25). The third driving gear (16) and the third driven gear (15) are respectively fixed on the two second conveying rollers (26). The third driving gear (16) and the second driven gear (22) are meshed and transmitted. One of the second conveying rollers (26) is also provided with a second driving gear (21).

5. The surface spraying equipment for civil air defense door according to claim 1 is characterized in that: The second driving assembly (11) comprises a third motor (12), a screw rod (6), a sliding seat (10), a fourth motor (9), a pull rope (14) and a winding wheel (13); the screw rod (6) is rotatably mounted on the upper end of the fixing frame (5); the output shaft of the third motor (12) is fixedly connected to one end of the screw rod (6); the sliding seat (10) is slidably mounted on the fixing frame (5), and the sliding seat (10) is threadedly connected to the screw rod (6); the fourth motor (9), the pull rope (14) and the winding wheel (13) are each provided in two groups; fastening bolts (52) are provided on both sides of one end of the flap (55); a rotating sleeve (51) is provided on the fastening bolt (52); one end of the pull rope (14) is fixedly connected to the rotating sleeve (51), and the other end is wound on the winding wheel (13); the winding wheel (13) is fixed on the output shaft of the fourth motor (9); and the fourth motor (9) is mounted on the sliding seat (10).

6. The surface spraying equipment for civil air defense door according to claim 5 is characterized in that: The third driving assembly (7) comprises a sliding rod (56), a magnet (58) and a second power member. A mounting column (50) is provided on a side of the flap (55) away from the first conveying device (2) and the second conveying device (18). The sliding rod (56) is slidably arranged in the mounting column (50), and one end of the sliding rod (56) passes through the flap (55) and extends into the cavity (53). The magnet (58) is fixed on the sliding rod (56), and the magnet (58) is located in the cavity (53). The sliding rod (56), the magnet (58) and the mounting column (50) are each provided in two groups. The second power member is provided in two groups and drives the sliding rod (56) to slide back and forth horizontally.

7. The surface spraying equipment for civil air defense door according to claim 6 is characterized in that: The second power member comprises a fifth motor (49), a second transmission shaft (48) and a fourth driving gear (47); two fourth driving gears (47) are provided and fixed on the second transmission shaft (48); a fixing block (46) for mounting the second transmission shaft (48) is provided on the mounting platform (8); an output shaft of the fifth motor (49) is fixedly connected to the second transmission shaft (48); two groups of the second power members are arranged side by side with the first conveying device (2) and the second conveying device (18), respectively; a plurality of annular tooth grooves (57) distributed at equal intervals are provided on the sliding rod (56); a through groove (59) is provided on the mounting column (50); the sliding rod (56) is meshed with the fourth driving gear (47) through the annular tooth groove (57) for transmission.

8. The surface spraying equipment for civil air defense door according to claim 1 is characterized in that: The oven (4) comprises a baffle (32), a first fan (30) and a heating tube (31); the first fan (30) and the heating tube (31) are both located in the baffle (32); the first fan (30) is located above the heating tube (31); negative pressure devices (3) are provided on both sides of the oven (4); the negative pressure devices (3) comprise a drainage hood (28) and a second fan (33); a drainage port is provided below the drainage hood (28); the second fan (33) is located above the drainage hood (28); a reflux chamber is provided above the baffle (32); the reflux chamber is communicated with the inner cavity of the drainage hood (28).

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