Spraying device for inner wall and outer wall of plastic-coated steel pipe

Abstract

The utility model belongs to the technical field of plastic-coated steel pipe production, and discloses a plastic-coated steel pipe inner and outer wall spraying device which comprises a supporting assembly used for supporting and driving a steel pipe to rotate in a friction mode, and a spraying assembly used for moving towards the interior of the steel pipe to conduct spraying is arranged on one side of the supporting assembly. The moving assembly is arranged at the top of the spraying assembly and used for moving along with spraying for preliminary drying and moving independently in a reciprocating mode for secondary drying, and a drying assembly used for conducting internal and external synchronous hot air drying is installed on the moving assembly. According to the spraying device for the inner wall and the outer wall of the plastic-coated steel pipe, through the arrangement of following spraying hot air drying, the steel pipe is dried in the spraying process, and follow-up operation is reduced; through the arrangement of primary drying along with spraying movement and secondary drying through independent reciprocating movement, the drying effect is improved; and through internal and external synchronous hot air drying, the inner side and the outer side of the steel pipe are dried at the same time, and the drying speed is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic-coated steel pipe production, in particular to a device for spraying inner and outer walls of a plastic-coated steel pipe. Background Art

[0002] Plastic-coated steel pipe, also known as plastic-coated pipe, steel-plastic composite pipe, and plastic-coated composite steel pipe, is a steel-plastic composite steel pipe with a steel pipe as the base. A layer of plastic anti-corrosion layer is welded on the inner surface of the steel pipe (bottom pipe) through spraying, rolling, dipping, and suction processes, or a plastic anti-corrosion layer is welded on the inner and outer surfaces. The plastic-coated steel pipe has excellent corrosion resistance and relatively small friction resistance. During its production process, a spraying device is required to spray its inner and outer surfaces.

[0003] In comparison, the Chinese patent with authorization announcement number CN220514528U discloses a device for spraying inner and outer walls of a plastic-coated steel pipe, including a base, a first mounting groove is opened at the top right end of the base, a first adjusting component is arranged inside the first mounting groove, a first mounting plate is arranged on the top of the first adjusting component, a rotating groove is opened on the inner side of the first mounting plate, a rotating plate is rotatably connected to the inside of the rotating groove, a positioning structure is arranged at the bottom of the rotating groove, an extension plate is fixedly connected to one side of the first mounting plate, a paint box is arranged on the top of the extension plate, a nozzle is fixedly connected to one side of the rotating plate, a nozzle is fixedly installed at the bottom of the nozzle, a bellows is arranged between the paint box and the nozzle, a fixing plate is fixedly connected to the middle part of the top of the base, a swivel is rotatably connected to the surface of the fixing plate, a first connecting plate is fixedly connected to one side of the swivel, a group of connecting holes are opened on the surface of the fixing plate, and a second mounting groove is opened at the top left end of the base.

[0004] The above patent cannot dry the steel pipe after spraying the steel pipe, so a new device needs to be designed. Utility Model Content

[0005] The purpose of the utility model is to provide a device for spraying the inner and outer walls of a plastic-coated steel pipe to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for spraying the inner and outer walls of a plastic-coated steel pipe, comprising a support assembly for supporting and frictionally driving the steel pipe to rotate, a spray assembly for moving toward the inside of the steel pipe for spraying is arranged on one side of the support assembly, and a moving assembly for following the spraying movement for preliminary drying and reciprocating for secondary drying is arranged on the top of the spray assembly, and a drying assembly for synchronous hot air drying of the inside and outside is installed on the moving assembly;

[0008] The moving assembly comprises a support plate, one side of the support plate is symmetrically provided with two slide rails, a lead screw is provided in the slide rail, a second motor is installed at one end of the lead screw, and a slider is provided on the lead screw;

[0009] The drying component includes a hot air box, a fan is installed on one side of the hot air box, twelve heating tubes are symmetrically arranged in the hot air box, two spring tubes are symmetrically installed on the upper and lower sides of the hot air box, and a drying bucket is arranged at one end of the spring tube away from the hot air box.

[0010] Furthermore: the support assembly includes a base plate, two support rollers are symmetrically installed on both sides of the rear side of the base plate, a friction roller is arranged in front of the support roller, and a first motor is installed on one side of the friction roller.

[0011] Furthermore: the spray assembly includes a slide seat, a slide table is slidably mounted on the slide seat, a spray box is arranged on the slide table, a spray pump is installed on the spray box, a spray pipe is installed on the spray pump, and two spray heads are symmetrically installed on one side of the spray pipe.

[0012] Furthermore: the slide rail is connected to the support plate by bolts.

[0013] Furthermore: the connection between the upper and lower ends of the hot air box and the spring tube is in a conical shape, and a flow equalizing plate is installed in the drying bucket.

[0014] Furthermore: the two friction rollers are coaxially arranged.

[0015] Compared with the prior art, the beneficial effects are:

[0016] 1. Through the setting of hot air drying following spraying, the steel pipe is dried during the spraying process, reducing the subsequent operations;

[0017] 2. The drying effect is improved by setting up the preliminary drying following the spraying movement and the secondary drying by separate reciprocating movement;

[0018] 3. Through the setting of synchronous hot air drying inside and outside, the inside and outside of the steel pipe are dried at the same time, which improves the drying speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a device for spraying inner and outer walls of a plastic-coated steel pipe according to the utility model;

[0020] Figure 2 This is an axonometric diagram of a support assembly of a device for spraying inner and outer walls of a plastic-coated steel pipe according to the utility model;

[0021] Figure 3 It is a front view of a spraying assembly of a spraying device for inner and outer walls of a plastic-coated steel pipe according to the utility model;

[0022] Figure 4 It is a front view of a moving component of a device for spraying inner and outer walls of a plastic-coated steel pipe according to the utility model;

[0023] Figure 5 It is an axonometric diagram of a drying component of a device for spraying inner and outer walls of a plastic-coated steel pipe described in the utility model.

[0024] In the accompanying drawings: 101, bottom plate; 102, support roller; 103, friction roller; 104, first motor; 201, slide seat; 202, slide table; 203, spray box; 204, spray pump; 205, spray pipe; 206, nozzle; 301, support plate; 302, slide rail; 303, screw rod; 304, slider; 305, second motor; 401, hot air box; 402, heating tube; 403, fan; 404, spring tube; 405, drying bucket; 406, flow equalizing plate; 5, steel pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 A device for spraying the inner and outer walls of a plastic-coated steel pipe includes a support component for supporting and frictionally driving the steel pipe to rotate, a spray component for moving toward the inside of the steel pipe for spraying is arranged on one side of the support component, and also includes a moving component arranged on the top of the spray component for following the spraying movement for preliminary drying and independent reciprocating movement for secondary drying, and a drying component for synchronous hot air drying inside and outside is installed on the moving component.

[0027] In this embodiment: the support assembly includes a bottom plate 101, two support rollers 102 are symmetrically installed on both sides of the rear side of the bottom plate 101, a friction roller 103 is arranged in front of the support roller 102, and a first motor 104 is installed on one side of the friction roller 103. The two friction rollers 103 are coaxially arranged, and the steel pipe 5 is horizontally placed between the two support rollers 102 and the friction roller 103 under the support of the bottom plate 101, and then the first motor 104 drives the friction roller 103 to rotate and drive the steel pipe 5 to rotate by friction;

[0028] In this embodiment: the spraying assembly includes a slide 201, a slide 202 is slidably mounted on the slide 201, a spray box 203 is arranged on the slide 202, a spray pump 204 is mounted on the spray box 203, a spray pipe 205 is mounted on the spray pump 204, and two spray heads 206 are symmetrically mounted on one side of the spray pipe 205. The slide 202 drives the spray box 203 to move along the slide 201 toward the steel pipe 5, and extends the spray head 206 to the inner and outer sides of the steel pipe 5. At this time, the spray pump 204 delivers the paint in the spray box 203 into the spray pipe 205 and sprays it out from the spray head 206 to spray the steel pipe 5;

[0029] In this embodiment: the moving assembly includes a support plate 301, and two slide rails 302 are symmetrically arranged on one side of the support plate 301, a screw rod 303 is arranged in the slide rail 302, a second motor 305 is installed at one end of the screw rod 303, a slider 304 is arranged on the screw rod 303, and the slide rail 302 is bolted to the support plate 301. After spraying, the support plate 301 supports the second motor 305 to drive the screw rod 303 to rotate and push the slider 304 to drive the drying bucket 405 to move back and forth along the slide rail 302, and the steel pipe 5 is dried for the second time until the paint is completely cured;

[0030] In this embodiment: the drying component includes a hot air box 401, a fan 403 is installed on one side of the hot air box 401, twelve heating tubes 402 are symmetrically arranged in the hot air box 401, two spring tubes 404 are symmetrically installed on the upper and lower sides of the hot air box 401, a drying bucket 405 is arranged at the end of the spring tube 404 away from the hot air box 401, the connection between the upper and lower ends of the hot air box 401 and the spring tube 404 is conical, and a flow equalizing plate 406 is installed in the drying bucket 405. The air blown out by the fan 403 is heated by the heating tube 402 in the hot air box 401, and then sent from the spring tube 404 to the two drying buckets 405, and blown evenly to the surface of the steel pipe 5 through the flow equalizing plate 406 to dry the steel pipe 5.

[0031] Working principle: The steel pipe 5 is placed horizontally between the two support rollers 102 and the friction roller 103 under the support of the bottom plate 101, and then the first motor 104 drives the friction roller 103 to rotate, and the friction drives the steel pipe 5 to rotate, and the slide 202 drives the spray box 203 and the support plate 301 to move along the slide 201 toward the steel pipe 5, and the nozzle 206 and the drying bucket 405 are extended to the inside and outside of the steel pipe 5. At this time, the spray pump 204 sends the paint in the spray box 203 into the spray pipe 205 and sprays it out from the nozzle 206, and the steel pipe 5 During spraying, the wind from the fan 403 is heated by the heating tube 402 in the hot air box 401, and then sent to the two drying buckets 405 from the spring tube 404, and evenly blown to the surface of the steel pipe 5 through the flow equalizing plate 406, so as to perform preliminary drying on the sprayed area of ​​the steel pipe 5; after the spraying is completed, the support plate 301 supports the second motor 305 to drive the screw rod 303 to rotate and push the slider 304 to drive the drying bucket 405 to move back and forth along the slide rail 302, so as to perform secondary drying on the steel pipe 5 until the coating is completely cured.

[0032] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for spraying the inner and outer walls of a plastic-coated steel pipe, comprising a support assembly for supporting and frictionally driving the steel pipe to rotate, wherein one side of the support assembly is provided with a spray assembly for moving toward the inside of the steel pipe for spraying, characterized in that: It also includes a moving component arranged on the top of the spraying component for following the spraying movement for primary drying and independently reciprocating for secondary drying, and a drying component for synchronous hot air drying inside and outside is installed on the moving component; The moving assembly comprises a support plate (301), two slide rails (302) are symmetrically arranged on one side of the support plate (301), a screw rod (303) is arranged inside the slide rail (302), a second motor (305) is installed at one end of the screw rod (303), and a slider (304) is arranged on the screw rod (303); The drying component comprises a hot air box (401), a fan (403) is installed on one side of the hot air box (401), twelve heating tubes (402) are symmetrically arranged in the upper and lower parts of the hot air box (401), two spring tubes (404) are symmetrically installed on the upper and lower sides of the hot air box (401), and a drying bucket (405) is arranged at one end of the spring tube (404) away from the hot air box (401).

2. A plastic-coated steel pipe inner and outer wall spraying device according to claim 1, characterized in that: The support assembly comprises a base plate (101), two support rollers (102) are symmetrically mounted on both sides of the rear side of the base plate (101), a friction roller (103) is arranged in front of the support roller (102), and a first motor (104) is mounted on one side of the friction roller (103).

3. The device for spraying inner and outer walls of a plastic-coated steel pipe according to claim 1, characterized in that: The spraying assembly comprises a slide seat (201), a slide table (202) is slidably mounted on the slide seat (201), a spray box (203) is arranged on the slide table (202), a spray pump (204) is mounted on the spray box (203), a spray pipe (205) is mounted on the spray pump (204), and two spray heads (206) are symmetrically mounted on one side of the spray pipe (205) in an upper and lower manner.

4. The device for spraying inner and outer walls of a plastic-coated steel pipe according to claim 1, characterized in that: The slide rail (302) is bolted to the support plate (301).

5. The device for spraying inner and outer walls of a plastic-coated steel pipe according to claim 1, characterized in that: The connection between the upper and lower ends of the hot air box (401) and the spring tube (404) is in a conical shape, and a flow equalizing plate (406) is installed in the drying bucket (405).

6. The device for spraying inner and outer walls of a plastic-coated steel pipe according to claim 2, characterized in that: The two friction rollers (103) are coaxially arranged.

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