Spraying equipment for spraying inner coating of composite pipe and spraying method of spraying equipment

Abstract

The invention discloses spraying equipment for spraying an inner coating of a composite pipe, and belongs to the technical field of pipe processing, the spraying equipment comprises a bottom plate and a group of storage bins mounted on the bottom plate, and two groups of moving wheels are rotationally mounted below the bottom plate; an inner wall spraying part for spraying the inner wall of the pipeline is arranged on the storage bin; the inner wall spraying part comprises a supporting cylinder fixedly connected between the storage bins, an inner cylinder is slidably connected to the inner side of the supporting cylinder, and a guide bin is installed in the middle of the inner cylinder. According to the device, a group of guide plates on a hollow rod, second spray heads on the inner sides of the guide plates and first spray heads on a mounting ring are located at the same circle center, so that when an inner cylinder is pushed to extend by a hydraulic rod, the first spray heads and the second spray heads can slide and extend together, and paint guided into the guide plates and a guide bin is sprayed to the inner wall and the outer wall of a pipeline together; the material guide plate can be driven by the air cylinder to rotate, stretch and adjust to avoid a supporting component for supporting the pipeline, and therefore the spraying efficiency of the inner wall and the outer wall of the pipeline is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, in particular to a spraying device and a spraying method for spraying an inner coating of a composite pipe. Background Art

[0002] Composite pipes are based on a composite structure of metal and thermoplastics. They are lined with plastic polypropylene, polyethylene or welded with non-metallic materials such as cross-linked polyethylene. They have the advantages of both metal and non-metallic pipes.

[0003] During the processing of composite pipes, in order to improve the protective performance of the pipes themselves, it is usually necessary to apply a protective coating on the inner wall of the pipe to improve the anti-corrosion, anti-rust and wear resistance of the pipes themselves. For example, the invention patent with announcement number CN118663518A discloses an anti-rust spraying device for steel structure pipes, comprising: a base, a lower rectangular opening and an upper rectangular opening are respectively opened at the bottom and top of the base, and slide grooves are opened on the inner walls on the left and right sides of the upper rectangular opening. A clamping mechanism is provided on the base. When coating the inner wall of the pipe, the traction rope is pulled at a constant speed to make the device move along the inner wall of the pipe. Under the action of the traction rope, the pressure plate is separated from the storage tank, and the plug is pulled out from the discharge port, and the paint leaks out along the discharge port to the inner wall of the pipe. At this time, the motor is started to drive the brush to rotate, and the leaked paint is evenly applied to the inner wall of the pipe by the brush, so as to achieve the effect of painting the inner wall of the pipe, solve the problem of difficulty in painting the inner surface of the pipe, and is easy to operate and has high painting efficiency.

[0004] However, the spraying device in the above application can only spray the inner wall of the pipe during the process of spraying the anti-rust coating. Since most anti-rust coatings are not only sprayed on the inner wall of the pipe, but the inner wall of the pipe also needs to be sprayed with the anti-rust coating to increase the rust resistance of the inside and outside of the pipe, the inside and outside of the pipe need to be sprayed separately during the spraying of the anti-rust coating by the spraying device in the above application, resulting in poor spraying efficiency. Therefore, a spraying device for spraying the inner coating of a composite pipe and a spraying method thereof are proposed to solve the above problems. Summary of the Invention

[0005] (1) Purpose of the invention In order to solve the technical problems existing in the background technology, the present invention proposes a spraying equipment and a spraying method for spraying the inner coating of a composite pipe. By cooperating with the inner wall spraying parts, the entire spraying parts can spray the inner and outer walls of the pipe at the same time during the horizontal telescopic movement, which has the advantages of improving the spraying efficiency.

[0006] (2) Technical solution The present invention provides a spraying device for spraying inner coating of composite pipes, comprising a base plate and a group of storage bins installed on the base plate, wherein two groups of movable wheels are rotatably installed below the base plate; The storage bin is provided with an inner wall spraying part for spraying the inner wall of the pipeline; The inner wall spraying part includes a support cylinder fixedly connected between a group of material storage bins, the inner side of the support cylinder is slidably connected to the inner cylinder, the middle part of the inner cylinder is provided with a guide bin, one end of the support cylinder is fixedly connected to a hydraulic rod, and the output end of the hydraulic rod is fixedly connected to the guide bin of the inner cylinder, the end of the guide bin away from the hydraulic rod is fixedly connected to the motor, the output shaft of the motor is fixedly connected to the connecting disk, the other end of the support cylinder is fixedly connected to the mounting ring, the side of the connecting disk away from the motor is fixedly connected to an electric push rod, the output end of the electric push rod is fixedly connected to the support disk, and the side of the material guide bin close to the mounting ring is connected to a plurality of discharge pipes that pass through the support disk, and one end of the discharge pipe that passes through the support disk is connected to a first spray head; A cleaning piece for cleaning the inner wall of the pipeline is provided between the support plate and the mounting ring; The inner cylinder is provided with an outer wall spraying part for spraying the outer wall of the pipeline; A feeding part for feeding materials to the guide silo and the outer wall spraying part is provided on one side of the material storage silo.

[0007] Preferably, a plurality of limiting rods with one end passing through the support plate are fixedly connected to the side of the connecting plate close to the electric push rod, the discharge pipe passes through one end of the support plate and is fixedly connected to the mounting ring, and the first nozzle is located between the mounting ring and the support plate.

[0008] Preferably, the cleaning member includes a plurality of support rods, one end of which passes through the mounting ring, the support rod passing through the mounting ring is slidably connected to a brush cylinder, a spring is fixedly connected between the brush cylinder and the support rod, and the support plate is hinged to a side close to the mounting ring with a connecting rod having one end hinged to the support rod; One end of the support rod passing through the mounting ring is convex-shaped, and the end of the brush tube close to the support rod is concave-shaped, and the concave end of the brush tube is slidably connected to the convex end of the support rod, and the spring is fixedly connected between the concave end of the brush tube and the convex end of the support rod.

[0009] Preferably, the inner wall spraying part includes a hollow rod fixedly connected to the top of the inner cylinder and passing through the supporting cylinder, the end of the hollow rod away from the inner cylinder is fixedly connected to a mounting block, the mounting block is fixedly connected to a cylinder, and both sides of the connection between the hollow rod and the mounting block are connected to connecting pipes, the ends of the connecting pipes are rotatably connected to a material guide plate, the inner side of the material guide plate is connected to a plurality of second nozzles, and the output end of the cylinder is hinged to a hinged rod with one end hinged to the material guide plate.

[0010] Preferably, the hollow part of the hollow rod is connected to the connecting pipe, the material guide plate is semicircular, the material guide plate is hollow, and its hollow part is respectively connected to the second nozzle and the connecting pipe, and the end of the connecting pipe located inside the hollow part of the material guide plate is T-shaped.

[0011] Preferably, the two storage bins are provided with support members for stable support spraying; the support members include two support plates symmetrically fixedly connected to the two storage bins, a threaded rod with one end passing through the support plate is threadedly connected to the support plate, one end of the threaded rod passing through the support plate is rotatably connected to a push plate, the push plate is fixedly connected to a push rod on the side close to the mounting ring, and the upper end of the support plate is fixedly connected to a support ring slidably connected to the outside of the hollow rod.

[0012] Preferably, the support plate is convex-shaped, and its upper end is L-shaped. A threaded hole is provided at the lower end of the support plate, and the threaded hole is adapted to the thread on the outside of the threaded rod. The horizontal position of the two support rods is flush with the center of the mounting ring.

[0013] Preferably, the feeding part includes a pump body fixedly connected to the side of the two storage bins away from the mounting ring, the discharge end of the pump body is connected to two feeding pipes, which are respectively connected to the guide bin and the hollow rod, and the feed end of the pump body is connected to two conveying pipes, which are respectively connected to the two storage bins.

[0014] Preferably, both the feed pipes and the delivery pipe are connected to the output end and the input end of the pump body through a three-way valve, the feed pipes are hoses, and one of the feed pipes is connected to the hollow part of the hollow rod.

[0015] A spraying device for spraying an inner coating of a composite pipe and a spraying method thereof, comprising the following steps: S1. Support adjustment: When the threaded rod is rotated, the push plate can be driven to move toward or away from the support plate. Since a set of support rods are flush with the center of the mounting ring, the retracted support rods can clamp and fix one end of the pipe to be sprayed, so that the entire spraying equipment can be stabilized at one end of the pipe. At the same time, the support ring on the support plate can stably support the hollow rod that is movable and adjustable; S2. Inner wall spraying: The activated hydraulic rod can push the inner cylinder and the first nozzle and brush cylinder at the other end of the inner cylinder to extend into the horizontally placed pipe through the material guide bin, and the activated electric push rod pushes the connecting rod to drive the brush cylinder to touch the inner wall of the pipe, and then the material can be fed into the material guide bin, and the brush cylinder and the first nozzle are driven by the motor to rotate together to clean and spray the inner wall of the pipe; S3. External wall spraying: When the inner cylinder is pushed and extended by the hydraulic rod, the inner cylinder can drive the guide plate at its end to extend together through the hollow rod. Since a set of guide plates and the mounting ring are at the same center of a circle, they can cover the outer surface of the outer wall of the pipe and adjust with the inner cylinder to allow the paint introduced into the guide plates to spray the outer wall of the pipe. The guide plates can also be driven by the cylinder to rotate and extend to avoid the pipe support components encountered by the guide plates during the horizontal movement. S4. Feeding: Since the feeding pipe is a hose, it can be extended and retracted as the guide bin and the hollow rod move. After the activated pump body pumps the paint through the delivery pipe, it can be transported to the guide bin and the hollow rod respectively through the feeding pipe, and then sprayed through the first nozzle and the second nozzle respectively through the connecting pipe and the discharge pipe.

[0016] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects: 1. The spraying equipment and method for spraying the inner coating of the composite pipe are characterized by the following features: a set of guide plates on the hollow rod, a second nozzle on the inner side of the guide plate, and a first nozzle on the mounting ring are located at the same center. Therefore, when the inner cylinder is pushed and extended by the hydraulic rod, the first nozzle and the second nozzle can slide and extend together, so that the paint introduced into the guide plate and the guide bin is sprayed on the inner and outer walls of the pipe at the same time. At the same time, the guide plate can also be driven by the cylinder to rotate, extend and adjust to avoid the supporting structure of the pipe, thereby improving the spraying efficiency of the inner and outer walls of the pipe.

[0017] 2. The spraying equipment and spraying method for the inner coating of the composite pipe are as follows: the first nozzle and the brush cylinder located at the other end of the inner cylinder extend into the horizontally extended pipe, and the electric push rod can be started to push the connecting rod to drive the brush cylinder to elastically extend and resist the inner wall of the pipe, and then the motor drives the brush cylinder to rotate together with the first nozzle to perform rotational cleaning and rotational spraying on the inner wall of the pipe, so that the inner wall sprayed by the first nozzle is brushed and cleaned in advance by the brush cylinder, so as to improve the spraying effect of the paint on the inner wall.

[0018] 3. The spraying equipment and spraying method for spraying the inner coating of the composite pipe, in the process of rotating the adjusting threaded rod, can drive the push plate to move toward or away from the side of the support plate, and the contraction adjustment rod can clamp and fix the end of the pipe facing the mounting ring, so that the entire spraying equipment can be stabilized at the end of one end of the pipe. At the same time, the support ring located on the support plate can stably support the movable and adjustable hollow rod to improve the stability of the first nozzle and the second nozzle during the spraying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 This is a side sectional view of the inner wall spraying part structure of the present invention; Figure 3 This is a side view of the outer wall spraying part structure of the present invention; Figure 4 This is a cross-sectional view of the connection between the connecting pipe and the guide plate structure of the present invention; Figure 5 This is a schematic diagram of the support structure of the present invention; Figure 6 It is a schematic diagram of the feeding part structure of the present invention.

[0020] Reference numerals: 1, bottom plate; 2, moving wheel; 3, storage bin; 4, inner wall spraying part; 41, support cylinder; 42, inner cylinder; 43, hydraulic rod; 44, guide bin; 45, motor; 46, discharge pipe; 47, connecting plate; 48, electric push rod; 49, limit rod; 410, support plate; 411, mounting ring; 412, first nozzle; 413, support rod; 414, brush cylinder; 41 5. Spring; 416. Connecting rod; 5. Outer wall spraying part; 51. Hollow rod; 52. Mounting block; 53. Cylinder; 54. Articulated rod; 55. Connecting pipe; 56. Guide plate; 57. Second nozzle; 6. Support part; 61. Support plate; 62. Support ring; 63. Threaded rod; 64. Push plate; 65. Push rod; 7. Feeding part; 71. Pump body; 72. Feeding pipe; 73. Delivery pipe. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0022] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, such as welding, riveting, or bonding, or a detachable connection, such as threaded connection, key connection, or pin connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium, or it may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] like Figure 1-6 As shown, the present invention provides a spraying device for spraying an inner coating of a composite pipe, comprising a base plate 1 and a group of storage bins 3 mounted on the base plate 1, and two groups of movable wheels 2 are rotatably mounted below the base plate 1; The storage bin 3 is provided with an inner wall spraying part 4 for spraying the inner wall of the pipeline.

[0025] In the present invention, the spraying part on the storage bin 3 can spray the inner and outer walls of the pipe simultaneously during the horizontal telescopic movement, thereby improving the spraying efficiency of the entire spraying equipment.

[0026] In an optional embodiment, the inner wall spraying part 4 includes a support cylinder 41 fixedly connected between a group of material storage bins 3, the inner side of the support cylinder 41 is slidably connected to the inner side of the support cylinder 41, and a material guide bin 44 is installed in the middle of the inner cylinder 42, one end of the support cylinder 41 is fixedly connected to a hydraulic rod 43, and the output end of the hydraulic rod 43 is fixedly connected to the material guide bin 44 of the inner cylinder 42, the end of the material guide bin 44 away from the hydraulic rod 43 is fixedly connected to a motor 45, the output shaft of the motor 45 is fixedly connected to a connecting disk 47, the other end of the support cylinder 41 is fixedly connected to a mounting ring 411, the side of the connecting disk 47 away from the motor 45 is fixedly connected to an electric push rod 48, the output end of the electric push rod 48 is fixedly connected to a support disk 410, and the side of the material guide bin 44 close to the mounting ring 411 is connected to a plurality of discharge pipes 46 that pass through the support disk 410, and one end of the discharge pipe 46 that passes through the support disk 410 is connected to a first nozzle 412; A cleaning piece for cleaning the inner wall of the pipeline is provided between the support plate 410 and the mounting ring 411 .

[0027] In this embodiment, the activated hydraulic rod 43 can push the inner cylinder 42 and the first nozzle 412 and the brush cylinder 414 located at the other end of the inner cylinder 42 to extend into the horizontally placed pipe through the material guide bin 44, and the activated electric push rod 48 can push the connecting rod 416 to drive the brush cylinder 414 to contact the inner wall of the pipe, and then feed the material into the material guide bin 44, and cooperate with the motor 45 to drive the cleaning part to rotate together with the first nozzle 412 to perform rotational cleaning and rotational spraying on the inner wall of the pipe.

[0028] It should be noted that a plurality of limiting rods 49 with one end passing through the support plate 410 are fixedly connected to the side of the connecting plate 47 close to the electric push rod 48, so that the support plate 410 driven by the electric push rod 48 is stably supported by the limiting rods 49 passing through the support plate 410; the discharge pipe 46 passes through one end of the support plate 410 and is fixedly connected to the mounting ring 411, and the first nozzle 412 is located between the mounting ring 411 and the support plate 410, so that the first nozzle 412 can rotate with the rotation of the mounting ring 411, and the place where the first nozzle 412 sprays is the place cleaned by the cleaning part.

[0029] In an optional embodiment, the cleaning piece includes a plurality of support rods 413, one end of which passes through the mounting ring 411. The support rod 413 passes through the mounting ring 411 and is slidably connected to one end with a brush cylinder 414. A spring 415 is fixedly connected between the brush cylinder 414 and the support rod 413. A connecting rod 416 is hinged on one side of the support plate 410 close to the mounting ring 411 and is hinged to the support rod 413 at one end.

[0030] In this embodiment, the support plate 410 pushes the support rod 413 to drive the brush tube 414 on the support rod 413 to elastically contact the inner wall of the pipe. Then, the squeezed spring 415 returns to push the brush tube 414 to fit tightly against the inner wall of the pipe.

[0031] It should be noted that one end of the support rod 413 passing through the mounting ring 411 is convex in shape, and the end of the brush tube 414 close to the support rod 413 is concave in shape, and the concave end of the brush tube 414 is slidably connected to the convex end of the support rod 413, and the spring 415 is fixedly connected between the concave end of the brush tube 414 and the convex end of the support rod 413, so that the concave end of the brush tube 414 can slide on the convex end of the support rod 413, and is elastically supported by the spring 415, and is reset by the spring 415.

[0032] In an optional embodiment, an outer wall spraying part 5 for spraying the outer wall of the pipeline is provided on the inner cylinder 42; the inner wall spraying part 4 includes a hollow rod 51 fixedly connected to the top of the inner cylinder 42 and passing through the support cylinder 41, and the end of the hollow rod 51 away from the inner cylinder 42 is fixedly connected to the mounting block 52, and the mounting block 52 is fixedly connected to the cylinder 53. Both sides of the connection between the hollow rod 51 and the mounting block 52 are connected to connecting pipes 55, and the end of the connecting pipe 55 is rotatably connected to a material guide plate 56, and the inner side of the material guide plate 56 is connected to a plurality of second nozzles 57, and the output end of the cylinder 53 is hinged to a hinged rod 54 whose end is hinged to the material guide plate 56.

[0033] In this embodiment, when the inner cylinder 42 is pushed and extended by the hydraulic rod 43, the inner cylinder 42 can drive the guide plate 56 at its end to extend together through the hollow rod 51. Since a set of guide plates 56 and the mounting ring 411 are at the same center of a circle, they can cover the outer surface of the outer wall of the pipe and adjust with the inner cylinder 42 to allow the paint introduced into the guide plate 56 to spray the outer wall of the pipe.

[0034] It should be noted that the hollow part of the hollow rod 51 is connected to the connecting pipe 55, so that the paint entering the hollow rod 51 can be introduced into the connecting pipe 55, the guide plate 56 is semicircular, the guide plate 56 is hollow, and its hollow part is respectively connected to the second nozzle 57 and the connecting pipe 55, and the end of the connecting pipe 55 located on the inner side of the hollow part of the guide plate 56 is T-shaped, so that the connecting pipe 55 can stably support the guide plate 56 while the paint introduced into the connecting pipe 55 can enter the guide plate 56 and be sprayed in a ring shape through the second nozzle 57 on the inner side of the guide plate 56.

[0035] In an optional embodiment, the two storage bins 3 are provided with support members 6 for stable support of spraying, and the support members 6 include two support plates 61 symmetrically fixedly connected to the two storage bins 3, and a threaded rod 63 with one end passing through the support plate 61 is threadedly connected to the support plate 61, and the threaded rod 63 passes through one end of the support plate 61 and is rotatably connected to a push plate 64, and the push plate 64 is fixedly connected to a side of the mounting ring 411 thereof, and the upper end of the support plate 61 is fixedly connected to a support ring 62 slidably connected to the outside of the hollow rod 51.

[0036] In this embodiment, by rotating the adjusting threaded rod 63, the push plate 64 can be driven to move toward or away from the side of the support plate 61, and a group of support rods 65 are flush with the center of the mounting ring 411. Therefore, the contracted and adjusted support rods 65 can clamp and fix one end of the pipe to be sprayed, so that the entire spraying equipment can be stabilized at the end of one end of the pipe. At the same time, the support ring 62 located on the support plate 61 can stably support the movable and adjustable hollow rod 51.

[0037] It should be noted that the support plate 61 is convex in shape, and its upper end is L-shaped. A threaded hole is provided at the lower end of the support plate 61, and the threaded hole is adapted to the thread on the outer side of the threaded rod 63. The horizontal position of the two push rods 65 is flush with the center of the mounting ring 411, so that when the rotating threaded rod 63 drives the push rod 65 to move and adjust the push plate 64, it can clamp and fix the end of the pipe facing the mounting ring 411, thereby improving the accuracy and stability of the mounting ring 411 and the guide plate 56 during the spraying process.

[0038] In an optional embodiment, a feeding part 7 is provided on one side of the storage bin 3 for feeding materials to the guide bin 44 and the outer wall spray part 5 respectively; the feeding part 7 includes a pump body 71 fixedly connected to the two storage bins 3 on the side away from the mounting ring 411, and the discharge end of the pump body 71 is connected to two feeding pipes 72 respectively connected to the guide bin 44 and the hollow rod 51, and the feed end of the pump body 71 is connected to two conveying pipes 73 respectively connected to the two storage bins 3.

[0039] In this embodiment, after the activated pump body 71 pumps the paint through the delivery pipe 73, it can be transported to the material guide bin 44 and the hollow rod 51 respectively through the supply pipe 72, and then sprayed through the first nozzle 412 and the second nozzle 57 respectively through the connecting pipe 55 and the discharge pipe 46.

[0040] It should be noted that the two feed pipes 72 and the delivery pipe 73 are connected to the output end and the input end of the pump body 71 through a three-way valve. The feed pipe 72 is a hose, and one of the feed pipes 72 is connected to the hollow part of the hollow rod 51, so that the output end and the input end of the pump body 71 can be connected to the two feed pipes 72 and the delivery pipe 73 respectively through the three-way valve.

[0041] A spraying device for spraying an inner coating of a composite pipe and a spraying method thereof, comprising the following steps: S1. Support adjustment: When the threaded rod 63 is rotated, the push plate 64 can be driven to move toward or away from the support plate 61. Since the set of supporting rods 65 are flush with the center of the mounting ring 411, the retracted supporting rods 65 can clamp and fix one end of the pipe to be sprayed, so that the entire spraying equipment can be stabilized at the end of one end of the pipe. At the same time, the support ring 62 located on the support plate 61 can stably support the movable hollow rod 51. S2. Inner wall spraying: The activated hydraulic rod 43 can push the inner cylinder 42 and the first nozzle 412 and the brush cylinder 414 located at the other end of the inner cylinder 42 to extend into the horizontally placed pipe through the material guide bin 44. The activated electric push rod 48 pushes the connecting rod 416 to drive the brush cylinder 414 to contact the inner wall of the pipe, thereby feeding the material into the material guide bin 44 and cooperating with the motor 45 to drive the brush cylinder 414 and the first nozzle 412 to rotate together, thereby performing rotational cleaning and rotational spraying on the inner wall of the pipe; S3. External wall spraying: When the inner cylinder 42 is pushed and extended by the hydraulic rod 43, the inner cylinder 42 can drive the guide plates 56 at its ends to extend together through the hollow rod 51. Since the set of guide plates 56 and the mounting ring 411 are co-centered, they can cover the outer surface of the outer wall of the pipe and adjust with the inner cylinder 42 to allow the paint introduced into the guide plates 56 to spray the outer wall of the pipe. The guide plates 56 can also be driven by the cylinder 53 to rotate and extend to avoid the pipe support components encountered by the guide plates 56 during the horizontal movement. S4. Feeding: Since the feeding pipe 72 is a hose, it can be extended and retracted as the guide bin 44 and the hollow rod 51 move. After the pump body 71 is started and pumps the paint through the delivery pipe 73, the paint can be delivered to the guide bin 44 and the hollow rod 51 respectively through the feeding pipe 72, and then sprayed through the first nozzle 412 and the second nozzle 57 respectively through the connecting pipe 55 and the discharge pipe 46.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device for spraying an inner coating of a composite pipe, comprising a base plate (1) and a group of storage bins (3) mounted on the base plate (1), wherein two groups of movable wheels (2) are rotatably mounted below the base plate (1), characterized in that: The storage bin (3) is provided with an inner wall spraying part (4) for spraying the inner wall of the pipeline; The inner wall spraying part (4) comprises a support cylinder (41) fixedly connected between a group of storage bins (3), an inner cylinder (42) is slidably connected to the inner side of the support cylinder (41), a guide bin (44) is installed in the middle of the inner cylinder (42), one end of the support cylinder (41) is fixedly connected to a hydraulic rod (43), and the output end of the hydraulic rod (43) is fixedly connected to the guide bin (44) of the inner cylinder (42), and the end of the guide bin (44) away from the hydraulic rod (43) is fixedly connected to a motor (45), and the output of the motor (45) is fixedly connected to the guide bin (44) of the inner cylinder (42). The shaft is fixedly connected to a connecting disk (47), the other end of the support cylinder (41) is fixedly connected to a mounting ring (411), the side of the connecting disk (47) away from the motor (45) is fixedly connected to an electric push rod (48), the output end of the electric push rod (48) is fixedly connected to the supporting disk (410), and the side of the guide bin (44) close to the mounting ring (411) is connected to a plurality of discharge pipes (46) passing through the supporting disk (410), and one end of the discharge pipe (46) passing through the supporting disk (410) is connected to a first nozzle (412); A cleaning piece for cleaning the inner wall of the pipeline is provided between the support plate (410) and the mounting ring (411); The inner cylinder (42) is provided with an outer wall spraying member (5) for spraying the outer wall of the pipeline; A feeding part (7) for feeding materials to the guide bin (44) and the outer wall spraying part (5) is provided on one side of the material storage bin (3).

2. The spraying equipment for spraying inner coating of composite pipe according to claim 1, characterized in that: A plurality of limiting rods (49) are fixedly connected to one side of the connecting plate (47) close to the electric push rod (48), one end of which passes through the supporting plate (410). One end of the discharge pipe (46) passes through the supporting plate (410) and is fixedly connected to the mounting ring (411), and the first nozzle (412) is located between the mounting ring (411) and the supporting plate (410).

3. The spraying equipment for spraying inner coating of composite pipe according to claim 2, characterized in that: The cleaning member comprises a plurality of support rods (413) one end of which passes through the mounting ring (411); one end of the support rod (413) passing through the mounting ring (411) is slidably connected to a brush cylinder (414); a spring (415) is fixedly connected between the brush cylinder (414) and the support rod (413); and a connecting rod (416) having one end hinged to the support rod (413) is hinged on one side of the support plate (410) close to the mounting ring (411); One end of the support rod (413) passing through the mounting ring (411) is convex-shaped, and one end of the brush cylinder (414) close to the support rod (413) is concave-shaped, and the concave end of the brush cylinder (414) is slidably connected to the convex end of the support rod (413), and the spring (415) is fixedly connected between the concave end of the brush cylinder (414) and the convex end of the support rod (413).

4. The spraying equipment for spraying inner coating of composite pipe according to claim 1, characterized in that: The inner wall spraying member (4) includes a hollow rod (51) fixedly connected to the upper part of the inner cylinder (42) and passing through the support cylinder (41), the end of the hollow rod (51) away from the inner cylinder (42) is fixedly connected to the mounting block (52), the mounting block (52) is fixedly connected to the cylinder (53), both sides of the connection between the hollow rod (51) and the mounting block (52) are connected to connecting pipes (55), the end of the connecting pipe (55) is rotatably connected to the guide plate (56), the inner side of the guide plate (56) is connected to a plurality of second nozzles (57), and the output end of the cylinder (53) is hinged to a hinged rod (54) whose end is hinged to the guide plate (56).

5. The spraying equipment for spraying inner coating of composite pipe according to claim 4, characterized in that: The hollow portion of the hollow rod (51) is connected to the connecting pipe (55), the guide plate (56) is semicircular, the guide plate (56) is hollow, and the hollow portion thereof is connected to the second nozzle (57) and the connecting pipe (55) respectively, and one end of the connecting pipe (55) located inside the hollow portion of the guide plate (56) is T-shaped.

6. The spraying equipment for spraying inner coating of composite pipe according to claim 4, characterized in that: The two storage bins (3) are provided with support members (6) for stably supporting the spraying; the support members (6) include two support plates (61) symmetrically fixedly connected to the two storage bins (3); a threaded rod (63) having one end passing through the support plate (61) is threadedly connected to the support plate (61); one end of the threaded rod (63) passing through the support plate (61) is rotatably connected to a push plate (64); a side of the push plate (64) close to the mounting ring (411) is fixedly connected to a push rod (65); the upper end of the support plate (61) is fixedly connected to a support ring (62) slidably connected to the outside of the hollow rod (51).

7. The spraying equipment for spraying inner coating of composite pipe according to claim 6, characterized in that: The support plate (61) is convex-shaped, and its upper end is L-shaped. A threaded hole is provided at the lower end of the support plate (61), and the threaded hole is adapted to the thread on the outer side of the threaded rod (63). The horizontal positions of the two support rods (65) are flush with the center of the mounting ring (411).

8. The spraying equipment for spraying inner coating of composite pipe according to claim 1, characterized in that: The feeding member (7) comprises a pump body (71) fixedly connected to the side of the two storage bins (3) away from the mounting ring (411); the discharge end of the pump body (71) is connected to two feeding pipes (72) respectively connected to the guide bin (44) and the hollow rod (51); the feed end of the pump body (71) is connected to two conveying pipes (73) respectively connected to the two storage bins (3).

9. The spraying equipment for spraying inner coating of composite pipe according to claim 1, characterized in that: The two feed pipes (72) and the delivery pipe (73) are both connected to the output end and the input end of the pump body (71) through a three-way valve. The feed pipes (72) are hoses, and one of the feed pipes (72) is connected to the hollow part of the hollow rod (51).

10. A spraying device and a spraying method for spraying an inner coating of a composite pipe, characterized in that: The following steps are involved: S1. Support adjustment: During the process of rotating the adjusting threaded rod (63), the push plate (64) can be driven to move toward or away from the side of the support plate (61), and a set of supporting rods (65) are flush with the center of the mounting ring (411). Therefore, the shrinking and adjusting supporting rods (65) can clamp and fix one end of the pipe to be sprayed, so that the entire spraying equipment can be stabilized at the end of one end of the pipe. At the same time, the support ring (62) located on the support plate (61) can stably support the hollow rod (51) that is movable and adjustable; S2, inner wall spraying: the activated hydraulic rod (43) can push the inner cylinder (42) and the first nozzle (412) and the brush cylinder (414) located at the other end of the inner cylinder (42) to extend into the horizontally placed pipeline through the guide bin (44), and the activated electric push rod (48) can push the connecting rod (416) to drive the brush cylinder (414) to contact the inner wall of the pipeline, and then feed the material into the guide bin (44), and cooperate with the motor (45) to drive the brush cylinder (414) and the first nozzle (412) to rotate together, so as to perform rotation cleaning and rotation spraying on the inner wall of the pipeline; S3, outer wall spraying: When the inner cylinder (42) is pushed and extended by the hydraulic rod (43), the inner cylinder (42) can drive the guide plate (56) at its end to extend together through the hollow rod (51). Since a set of guide plates (56) and the mounting ring (411) are at the same center of a circle, they can be covered on the outer surface of the outer wall of the pipe and can be adjusted to extend and retract with the inner cylinder (42) so that the paint introduced into the guide plate (56) is sprayed on the outer wall of the pipe. The guide plate (56) can also be driven by the cylinder (53) to rotate and extend to avoid the pipe support member encountered by the guide plate (56) during the horizontal movement. S4. Feeding: Since the feeding pipe (72) is a hose, it can be extended and retracted as the guide bin (44) and the hollow rod (51) move. After the activated pump body (71) pumps the paint through the delivery pipe (73), the paint can be delivered to the guide bin (44) and the hollow rod (51) through the feeding pipe (72), and then sprayed through the first nozzle (412) and the second nozzle (57) through the connecting pipe (55) and the discharge pipe (46).

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