A plastic coating mechanism for polyethylene spiral corrugated pipe processing

Abstract

The application relates to a plastic coating mechanism for polyethylene spiral corrugated pipe processing, which comprises a rack, a conveying assembly, a support, a crawling assembly, a first spraying assembly, a second spraying assembly and a synchronous operation control unit. The rack is fixedly connected with a ring-shaped frame, and the conveying assembly is arranged in the ring-shaped frame and used for conveying the spiral corrugated pipe. In the application, the conveying assembly can continuously convey the long spiral heat preservation pipe into the ring-shaped frame, the support can continuously crawl into the spiral corrugated pipe through the setting of the crawling assembly, the spiral corrugated pipe and the support are relatively static, and the first spraying assembly and the second spraying assembly can simultaneously coat the outside and the inside of the spiral corrugated pipe. Therefore, the spiral corrugated pipe of any length can be coated in the application, the spiral corrugated pipe does not need to be clamped, and the coating efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and in particular to a coating mechanism for processing polyethylene spiral corrugated pipes. Background Technology

[0002] Polyethylene spiral corrugated pipe refers to a steel strip with a surface coated with adhesive resin and formed into a waveform as the main supporting structure, which is made of high-density polyethylene (PE) as the base material. After the polyethylene spiral corrugated pipe is produced, it needs to be coated with plastic liquid to increase its anti-corrosion performance, so plastic coating equipment is required.

[0003] Search results:

[0004] Existing Chinese patent CN 219664096 U discloses a polyethylene steel strip reinforced spiral corrugated pipe coating machine, belonging to the field of spiral corrugated pipe processing technology. It solves the problems of uneven coating and insufficient strength in existing devices. This polyethylene steel strip reinforced spiral corrugated pipe coating machine includes a base, on which a plastic liquid tank, a coating box, and a horizontal moving mechanism are fixed. A spiral corrugated pipe rotating mechanism is installed on the horizontal moving mechanism. A triangular support rod is fixed to the left side of the coating box, and an inner wall coating mechanism is installed on the triangular support rod. A vertical support rod is fixedly connected to the top of the coating box, and an outer wall coating mechanism is installed at the lower end of the vertical support rod. Both the inner and outer wall coating mechanisms are connected to infusion pipes, the other end of which extends into the bottom of the plastic liquid tank. A booster pump is installed in the middle of the infusion pipe.

[0005] Existing patent 2, Chinese patent with publication number CN 212069392 U, discloses a steel strip reinforced PE spiral corrugated pipe coating and drying mechanism, including a drying box, a support plate fixedly connected inside the drying box, and an opening on the support plate. A positioning device is provided at the top of the support plate. This steel strip reinforced PE spiral corrugated pipe coating and drying mechanism.

[0006] In the aforementioned patents:

[0007] Patent 1 has the following defects in actual use:

[0008] In this patent, a spiral corrugated pipe needs to be fitted over the outside of the first liquid collection pipe in order to spray it. However, in reality, spiral corrugated pipes are mostly used for drainage, so they are relatively long. The length of the first liquid collection pipe is limited, so when it is fitted, there is always a part of the central area of ​​the spiral corrugated pipe that cannot correspond to the first liquid collection pipe (second liquid collection pipe). Therefore, it is not possible to achieve continuous and comprehensive spraying for long spiral corrugated pipes, because the central position of the long spiral insulation pipe cannot be sprayed by the first liquid collection pipe.

[0009] Patent 2 has the following defects in actual use:

[0010] In this patent, a clamping method is used to clamp the spiral corrugated pipe before spraying. In reality, the spiral corrugated pipe is quite long, so it is very inconvenient and inefficient for workers to handle and clamp it. After clamping and spraying, it needs to be removed, so the coating efficiency is not high. Summary of the Invention

[0011] To address the existing technical problems of being unable to coat long spiral insulated pipes with plastic and low coating efficiency, this invention provides a coating mechanism for processing polyethylene spiral corrugated pipes.

[0012] The technical solution adopted in this invention is: a coating mechanism for processing polyethylene spiral corrugated pipes, comprising a frame, a conveying assembly, a support, a crawling assembly, a first spraying assembly, a second spraying assembly, and a synchronous operation control unit. A ring frame is fixedly connected to the frame. The conveying assembly is disposed within the ring frame for conveying the spiral corrugated pipe. The support is located within the spiral corrugated pipe. The crawling assembly is disposed outside the support, driving the support to crawl within the spiral corrugated pipe. The first spraying assembly is disposed outside the ring frame for spraying the plastic liquid onto the outer wall of the spiral corrugated pipe. The second spraying assembly is disposed outside the support for spraying the plastic liquid onto the inner wall of the spiral corrugated pipe. The synchronous operation control unit is used to locate and determine the position of the support within the spiral corrugated pipe.

[0013] By adopting the above technical solution, the conveying component can continuously transport a long spiral insulation pipe into the ring frame. Then, the crawling component allows the support to continuously crawl into the spiral corrugated pipe, keeping the spiral corrugated pipe relatively stationary with respect to the support. Finally, the first and second spraying components can simultaneously coat the exterior and interior of the spiral corrugated pipe. Therefore, in this invention, spiral corrugated pipes of any length can be coated without clamping them, thus improving coating efficiency.

[0014] Furthermore, the conveying assembly includes multiple electric push rods fixedly connected to the ring frame, a mounting frame fixedly connected to the piston rod of the electric push rod, and a conveying roller rotatably connected in the mounting frame. A first motor is also fixedly connected to the outside of the mounting frame, and the drive shaft of the first motor is fixedly connected to the conveying roller.

[0015] By adopting the above technical solution, it is possible to

[0016] Furthermore, the crawling assembly includes multiple sets of cylinders fixedly connected to the outside of the support, an adjustment frame fixedly connected to the outside of the cylinder piston rod, multiple sets of rotating rollers rotatably connected to the adjustment frame, and a track sleeved on the outside of the rotating rollers. The adjustment frame has an external second motor, and the drive shaft of the second motor is fixedly connected to the rotating rollers.

[0017] By adopting the above technical solution, the second motor drives the rotating roller to rotate, and the rotating roller can transport the spiral corrugated pipe.

[0018] Furthermore, the first spraying assembly includes a first conveying pipe fixedly connected to the outside of the ring frame and multiple sets of first nozzles fixedly connected to the first conveying pipe. A feed pipe is fixedly connected to the first conveying pipe. A storage tank is also provided outside the frame. A first plastic liquid pump is provided on the storage tank. The output end of the first plastic liquid pump is fixedly connected to the feed pipe. A pipe is fixedly connected to the input end of the first plastic liquid pump, and the pipe extends into the storage tank.

[0019] By adopting the above technical solution, the plastic liquid sprayed from the first nozzle can be used to coat the exterior of the spiral corrugated pipe.

[0020] Furthermore, the second spraying assembly includes a storage tank fixedly connected to the outside of the bracket, a second delivery pipe fixedly connected to the outside of the storage tank, and multiple sets of second nozzles fixedly connected to the outside of the second delivery pipe. A second plastic pump is fixedly connected to the outside of the storage tank. The output end of the second plastic pump is fixedly connected to the second delivery pipe, and the input end of the second plastic pump is fixedly connected to a pipe that extends into the storage tank.

[0021] By adopting the above technical solution, the plastic liquid sprayed through the second spray pipe can coat the inner wall of the spiral corrugated pipe.

[0022] Furthermore, an electrical box is fixedly connected to the outside of the bracket, a support plate is fixedly connected to the outside of the electrical box, and three sets of fixing rings are fixedly connected to the support plate.

[0023] By adopting the above technical solution, the corresponding electrical components can be installed through the electrical box.

[0024] Furthermore, the synchronous operation control unit includes a fixed frame fixedly connected to the outside of the ring frame, an electromagnet fixedly connected to the bottom of the fixed frame, a guide rod located in the fixed ring, a conical rod fixedly connected to the outside of the guide rod, a connecting rod rotatably connected to the fixed ring, an arc-shaped plate fixedly connected to the outside of the connecting rod, a laser rangefinder fixedly connected to the fixed ring, a control module disposed in the electrical box, and a first iron plate, a second iron plate, and a third iron plate disposed above the fixed ring. A baffle is fixedly connected to the position of the laser rangefinder corresponding to the position on the inner wall of the fixed ring. The first iron plate, the second iron plate, and the third iron plate are respectively fixedly connected to the corresponding guide rod. A circular plate is fixedly connected to the bottom of the guide rod, and a spring connects the circular plate to the support plate. The laser rangefinder and the second motor are both electrically coupled to the control module.

[0025] By adopting the above technical solution, when the bracket is in a stable state, the second iron plate corresponds to the electromagnet. Therefore, under magnetic attraction, the second iron plate can be driven to move upward. The second iron plate drives the guide rod and the conical rod to move upward. The conical rod abuts against the connecting rod, so the connecting rod rotates to the left and right sides. At the same time, the connecting rod drives the arc plate to block the laser emitted by the laser rangefinder. Therefore, the control module judges that the bracket is in a stable position in the spiral bellows, maintains the speed of the first motor and the second motor, and then performs stable spraying of plastic liquid, which plays the role of stabilizing the bracket.

[0026] Furthermore, a conveyor belt body is provided on one side of the frame; the connecting rod is rotatably connected to the fixed ring through a hinge seat, a rotating shaft is rotatably connected in the hinge seat, and a torsion spring is sleeved on the outside of the rotating shaft.

[0027] By adopting the above technical solution, the connecting rod and the tapered rod can be made to fit tightly together under the torsion of the torsion spring.

[0028] Furthermore, a hanging rope is fixedly connected to the bottom of the support frame, and a counterweight is fixedly connected to the bottom of the hanging rope.

[0029] By adopting the above technical solution, a counterweight can be set, which is perpendicular to the ground, so that the weight of the support can be increased, making the support stable in the spiral corrugated pipe and preventing the support from shifting in the spiral corrugated pipe. The counterweight can be a lead block, and the specific weight can be set according to the actual situation.

[0030] Furthermore, an air supply pipe is fixedly connected to the outside of the annular frame, and multiple sets of nozzles are fixedly connected to the outside of the air supply pipe. An air inlet pipe is also fixedly connected inside the air supply pipe.

[0031] By adopting the above technical solution, hot air can be output through the set air supply pipe and nozzle, and then sprayed out through the nozzle. The hot air sprayed out through the nozzle is used to dry the plastic liquid on the outside of the spiral insulation pipe.

[0032] The beneficial effects of this invention are:

[0033] 1. Compared with the prior art, in this invention, the conveying assembly can continuously convey a long spiral insulation pipe into the ring frame. Then, the crawling assembly allows the support to continuously crawl into the spiral corrugated pipe, keeping the spiral corrugated pipe and the support relatively stationary. Then, the first and second spraying assemblies can simultaneously coat the outside and inside of the spiral corrugated pipe. Therefore, in this invention, spiral corrugated pipes of any length can be coated without clamping them, thus improving coating efficiency.

[0034] 2. Compared with the prior art, in this invention, when the bracket is in a stable state, the second iron plate corresponds to the electromagnet. Therefore, under magnetic attraction, the second iron plate can be driven to move upward. The second iron plate drives the guide rod and the conical rod to move upward. The conical rod abuts against the connecting rod, so the connecting rod rotates to the left and right sides. At the same time, the connecting rod drives the arc plate to block the laser emitted by the laser rangefinder. Therefore, the control module determines that the bracket is in a stable position in the spiral bellows, maintains the speed of the first motor and the second motor, and then performs stable spraying of plastic liquid, which plays the role of stabilizing the bracket.

[0035] 3. Compared with the prior art, in this invention, if the crawling speed of the support is too fast or too slow, the first iron plate or the third iron plate will correspond with the electromagnet in time. Therefore, the control module can also adjust the crawling speed of the support in time by adjusting the speed of the second motor, so that the support can be stably kept in the spiral corrugated pipe.

[0036] 4. Compared with the prior art, in this invention, by setting a counterweight block perpendicular to the ground, the weight of the support can be increased, so that the support can be stably held in the spiral corrugated pipe and the support will not shift in the spiral corrugated pipe. The counterweight block can be a lead block, and the specific weight can be set according to the actual situation.

[0037] 5. Compared with the prior art, in this invention, hot air can be output through the provided air supply pipe and nozzle, and then sprayed out through the nozzle. The hot air sprayed out through the nozzle is used to dry the plastic liquid on the outside of the spiral insulation pipe.

[0038] 6. Compared with the prior art, in this invention, the cylinder pushes the adjusting frame to move outward, so that the track and the inner wall of the spiral corrugated pipe are in close contact. The second motor is used to drive the rotating roller to rotate, so that the rotating roller drives the track transmission. Thus, through the crawling of the track, the support can crawl on the inner wall of the spiral conveying pipe. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0040] Figure 2 This is a schematic diagram of the isometric structure of the present invention;

[0041] Figure 3 This is a three-dimensional structural diagram of the spiral bellows in the annulus in this invention;

[0042] Figure 4 This is a three-dimensional structural diagram of the frame and ring frame in this invention;

[0043] Figure 5 This is a schematic diagram of the ring frame structure in this invention;

[0044] Figure 6This is a three-dimensional structural diagram of the bracket in this invention;

[0045] Figure 7 This is a schematic diagram of the support structure in the spiral bellows of the present invention;

[0046] Figure 8 This is a schematic diagram of the support structure in this invention;

[0047] Figure 9 This is a three-dimensional structural diagram of the bracket in this invention;

[0048] Figure 10 yes Figure 1 Enlarged structural diagram of region A in the middle

[0049] Figure 11 This is a schematic diagram of the connecting rod in this invention;

[0050] Figure 12 This is a schematic diagram of the structure when the support is stable (the second iron plate corresponds to the electromagnet) in this invention;

[0051] Figure 13 This is a schematic diagram of the structure when the support speed is too slow in this invention (the third iron plate corresponds to the electromagnet);

[0052] Figure 14 This is a schematic diagram of the structure of the support when the speed is too fast (the first iron plate corresponds to the electromagnet) in this invention;

[0053] Figure 15 This is a control block diagram of the control module in this invention.

[0054] The components in the diagram are labeled as follows: 1. Frame; 2. Circular frame; 3. Electric push rod; 4. Mounting frame; 5. Conveyor roller; 6. First motor; 7. Conveyor belt body; 8. Air supply pipe; 9. Nozzle; 10. Air inlet pipe; 11. First conveying pipe; 12. First nozzle; 13. Feed pipe; 14. Fixing frame; 15. Support; 16. Storage box; 17. Second conveying pipe; 18. Second nozzle; 19. Electrical box; 20. Support plate; 21. Cylinder ; 22. Second motor; 23. Adjusting frame; 24. Rotary roller; 25. Track; 26. First iron plate; 27. Second iron plate; 28. Third iron plate; 29. ​​Fixing ring; 30. Hanging rope; 31. Counterweight; 32. Circular plate; 33. Electromagnet; 34. Guide rod; 35. Conical rod; 36. Connecting rod; 37. Arc-shaped plate; 38. Laser rangefinder sensor; 39. Baffle; 40. Spring; 41. Torsion spring; 42. Control module. Detailed Implementation

[0055] In the description of this invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] The following is in conjunction with the appendix Figure 1 —15. This invention will be further described.

[0058] To address the problems existing in the background art, this application proposes the following technical solution: a coating mechanism for processing polyethylene spiral corrugated pipes.

[0059] Example 1

[0060] The specific technical solution includes a frame 1, a conveying assembly, a support 15, a crawling assembly, a first spraying assembly, a second spraying assembly, and a synchronous operation control unit.

[0061] Further design as follows: a conveyor belt body 7 is provided on one side of the frame 1 for conveying the spiral corrugated pipe, and an annular frame 2 is fixedly connected on the frame 1. In this embodiment, there are two of both the frame 1 and the annular frame 2.

[0062] The conveying assembly is installed in the ring frame 2 and is used to convey the spiral corrugated pipe.

[0063] Specifically,

[0064] The conveying assembly includes multiple electric push rods 3 fixedly connected to the ring frame 2, a mounting frame 4 fixedly connected to the piston rod of the electric push rod 3, and a conveying roller 5 rotatably connected to the mounting frame 4. In this embodiment, three electric push rods 3 are fixedly connected to the outside of each ring frame 2. The electric push rods 3 can also be replaced by hydraulic cylinders or other linear motion mechanisms. A first motor 6 is also fixedly connected to the outside of the mounting frame 4. The drive shaft of the first motor 6 is fixedly connected to the conveying roller 5. The first motor 6 is used to drive the conveying roller 5 to rotate, thereby realizing the conveying of the spiral corrugated pipe. In order to prevent slippage, multiple layers of anti-slip strips can also be set on the outside of the conveying roller 5.

[0065] In a further refined design, in order to enable the inner wall of the spiral insulation pipe to be sprayed, the bracket 15 is located in the spiral corrugated pipe.

[0066] In order to stabilize the position of the bracket 15, the crawling component is set on the outside of the bracket 15, which drives the bracket 15 to crawl in the spiral bellows.

[0067] Specifically,

[0068] The crawling assembly includes multiple sets of cylinders 21 fixedly connected to the outside of the support 15, an adjusting frame 23 fixedly connected to the outside of the piston rod of the cylinders 21, multiple sets of rotating rollers 24 rotatably connected to the adjusting frame 23, and a track 25 sleeved on the outside of the rotating rollers 24. A second motor 22 is external to the adjusting frame 23, and the drive shaft of the second motor 22 is fixedly connected to the rotating rollers 24. The cylinders 21 are used to push the adjusting frame 23 to move outward, so that the track 25 is in close contact with the inner wall of the spiral corrugated pipe. The second motor 22 is used to drive the rotating rollers 24 to rotate, so that the rotating rollers 24 drive the track 25 to drive the transmission. Thus, through the crawling of the track 25, the support 15 can crawl on the inner wall of the spiral conveying pipe. Considering that the inner wall of the spiral corrugated pipe is circular, multiple arc-shaped strips are fixedly connected to the outside of the track 25 for fitting inside the spiral insulation pipe.

[0069] In order to achieve spraying, the first spraying assembly is set outside the ring frame 2 for spraying the plastic liquid onto the outer wall of the spiral corrugated pipe; the second spraying assembly is set outside the bracket 15 for spraying the plastic liquid onto the inner wall of the spiral corrugated pipe.

[0070] Specifically,

[0071] The first spraying assembly includes a first conveying pipe 11 fixedly connected to the outside of the annular frame 2 and multiple sets of first nozzles 12 fixedly connected to the first conveying pipe 11. The first conveying pipe 11 has an annular structure, and a feed pipe 13 is fixedly connected in the first conveying pipe 11. A storage tank is also provided outside the frame 1. A first plastic liquid pump is provided on the storage tank. The output end of the first plastic liquid pump is fixedly connected to the feed pipe 13. The input end of the first plastic liquid pump is fixedly connected to a pipe, and the pipe extends into the storage tank. The storage tank is filled with plastic liquid. The first plastic liquid pump is an existing product and can be purchased and used on the market. The first plastic liquid pump draws out the plastic liquid and delivers it to the first conveying pipe 11, and then sprays it out through the first nozzles 12, spraying it on the outside of the spiral corrugated pipe. The spraying principle is existing technology. Therefore, in this embodiment, the first plastic liquid pump and the storage tank are not marked with reference numerals. Those skilled in the art can understand it through the text description.

[0072] The second spraying assembly includes a storage box 16 fixedly connected to the outside of the bracket 15, a second delivery pipe 17 fixedly connected to the outside of the storage box 16, and multiple sets of second nozzles 18 fixedly connected to the outside of the second delivery pipe 17.

[0073] The storage tank 16 is externally fixedly connected to a second plastic liquid pump. The second plastic liquid pump is not marked with reference numerals in this embodiment, but those skilled in the art can understand it through the text description. The output end of the second plastic liquid pump is fixedly connected to the second delivery pipe 17, and the input end of the second plastic liquid pump is fixedly connected to a pipe that extends into the storage tank 16. The second plastic liquid pump draws the plastic liquid into the second delivery pipe 17 and then sprays it out through the second nozzle 18. The plastic liquid sprayed out through the first nozzle 12 is sprayed onto the outside of the spiral corrugated pipe.

[0074] In summary, this embodiment can not only synchronously transport the spiral corrugated pipe, but also synchronously spray the spiral corrugated pipe internally and externally, which greatly improves efficiency.

[0075] In order to stabilize the position of the bracket 15, a synchronous operation control unit is set up to determine the position of the bracket 15 in the spiral bellows.

[0076] An electrical box 19 is fixedly connected to the outside of the bracket 15. A support plate 20 is fixedly connected to the outside of the electrical box 19. Three sets of fixing rings 29 are fixedly connected to the support plate 20. A storage battery is also installed in the electrical box 19 to provide power.

[0077] In the specific design,

[0078] The synchronous operation control unit includes a fixed frame 14 fixedly connected to the outside of the ring frame 2, an electromagnet 33 fixedly connected to the bottom of the fixed frame 14, a guide rod 34 located in the fixed ring 29, a tapered rod 35 fixedly connected to the outside of the guide rod 34, a connecting rod 36 rotatably connected to the fixed ring 29, an arc-shaped piece 37 fixedly connected to the outside of the connecting rod 36, a laser rangefinder sensor 38 fixedly connected to the fixed ring 29, a control module 42 set in the electrical box 19, and a first iron plate 26, a second iron plate 27, and a third iron plate 28 set above the fixed ring 29.

[0079] Further details are as follows:

[0080] A baffle 39 is fixedly connected to the position of the laser rangefinder 38 on the inner wall of the fixed ring 29. The first iron plate 26, the second iron plate 27 and the third iron plate 28 are fixedly connected to the corresponding guide rods 34. A circular plate 32 is fixedly connected to the bottom of the guide rod 34. A spring 40 is connected between the circular plate 32 and the support plate 20. The laser rangefinder 38 and the second motor 22 are electrically coupled to the control module 42. The connecting rod 36 is rotatably connected to the fixed ring 29 through a hinge seat. A rotating shaft is rotatably connected in the hinge seat, and a torsion spring 41 is sleeved on the outside of the rotating shaft. Under the torsion of the torsion spring 41, the connecting rod 36 can be tightly in contact with the tapered rod 35. In this embodiment, the model of the laser rangefinder 38 is not limited. For example, an EX-L200 laser displacement rangefinder sensor or other models of laser rangefinder 38 can be used. In addition, in this embodiment, the laser rangefinder 38 can also be replaced by a proximity sensor to detect the position of the arc-shaped piece 37, which can also achieve the function required by the present invention. The control module 42 can be a programmable control module 42 or an Arduino development platform.

[0081] Depending on the actual situation, the number of fixing ring 29, first iron plate 26, second iron plate 27, third iron plate 28, and laser rangefinder 38 can be set to multiple, so as to detect multiple position points respectively, and is not limited to three.

[0082] The specific functions are described below:

[0083] To maintain the stable position of the support 15 within the helical bellows and prevent it from detaching from the bellows due to excessively fast or slow speeds, the following conditions apply:

[0084] In the first case, under stable conditions, the second iron plate 27 corresponds to the electromagnet 33, as shown in the attached diagram. Figure 12 Therefore, under magnetic attraction, the second iron plate 27 can be driven to move upward. The second iron plate 27 drives the guide rod 34 and the conical rod 35 to move upward. The conical rod 35 abuts against the connecting rod 36, causing the connecting rod 36 to rotate outward to the left and right. At the same time, the connecting rod 36 drives the arc-shaped plate 37 to block the laser emitted by the laser rangefinder 38 (initially, the laser emitted by the laser rangefinder 38 is blocked by the baffle 39, see attached). Figure 12 (The situation on the left), so when the arc-shaped piece 37 blocks the laser emitted by the laser range sensor 38 below the second iron plate 27, the measured distance becomes shorter (the distance between the original baffle 39 is switched to the distance between the arc-shaped piece 37, so the distance becomes shorter, such as from the original 20cm to 15cm). Therefore, the control module 42 determines that the bracket 15 is in a stable position in the spiral bellows, maintains the speed of the first motor 6 and the second motor 22, and then performs stable spraying of plastic liquid.

[0085] The second method is detailed in the appendix. Figure 13 If the support 15 is positioned too far back due to the rotational speed of the first motor 6 or the second motor 22, and cannot reach the output speed of the spiral bellows, then over a long period of time, the support 15 is likely to fall off the tail of the spiral bellows (because the output speed of the spiral conveyor pipe is greater than the crawling speed of the track 25).

[0086] Therefore, at this time, the third iron plate 28 corresponds to the electromagnet 33. So, based on the same principle, when the arc-shaped piece 37 blocks the laser emitted by the laser rangefinder 38 below the third iron plate 28, the measured distance becomes shorter (from the original distance between the plate and the baffle 39 to the distance between the plate and the arc-shaped piece 37). Therefore, the control module 42 determines that the support 15 cannot be stable, so it accelerates the speed of the second motor 22, causing the track 25 to crawl faster until the second iron plate 27 corresponds to the electromagnet 33.

[0087] The third method, see attached document. Figure 14 If the support 15 is positioned too far forward due to the rotational speed of the first motor 6 or the second motor 22, and the crawling speed of the track 25 exceeds the output speed of the spiral bellows, the support 15 is likely to fall off the top of the spiral bellows over time (because the output speed of the spiral conveyor is less than the crawling speed of the track 25). Therefore, at this time, the first iron plate 26 corresponds to the electromagnet 33. Based on the same principle, when the arc-shaped plate 37 blocks the laser emitted by the laser ranging sensor 38 below the first iron plate 26, the measured distance becomes shorter (from the original distance between the support plate 39 and the distance between the support plate 37 and the arc-shaped plate 37). Therefore, the control module 42 determines that the support 15 is unstable and accelerates the rotational speed of the second motor 22, causing the track 25 to crawl faster until the first iron plate 26 corresponds to the electromagnet 33.

[0088] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overview:

[0089] During use, the spiral corrugated pipe is conveyed to the ring frame 2 via the conveyor belt body 7;

[0090] Then, start the electric push rod 3 to drive the mounting frame 4 to move downward until the conveying roller 5 on the mounting frame 4 contacts the outside of the spiral corrugated pipe. Then start the first motor 6 to drive the conveying roller 5 to rotate, and the spiral corrugated pipe can be conveyed through the conveying roller 5.

[0091] Then, the bracket 15 is placed in the spiral bellows, and the cylinder 21 is started to drive the adjusting frame 23 to move outward until the track 25 contacts the inner wall of the spiral bellows, and the support plate 20 is horizontal with the ground.

[0092] Next, the second motor 22 is started to drive the track 25 and the roller 24 to rotate. The roller 24 drives the track 25 to move, so the track 25 can move along the inner wall of the spiral corrugated pipe.

[0093] Until the second iron plate 27 on the support 15 corresponds to the electromagnet 33, at the same time, maintain the crawling speed of the track 25 so that the second iron plate 27 on the support plate 20 corresponds to the electromagnet 33 synchronously.

[0094] At this time, the conveying roller 5 will also cause the spiral bellows to slide outward synchronously. Therefore, the crawling of the track 25 will also keep the support 15 in a certain position in the spiral bellows (compared to the state of relative motion, the support 15 is stationary outside the ring frame 2).

[0095] Finally, the first and second plastic liquid pumps are started. The first plastic liquid pump draws out the plastic liquid and delivers it to the first delivery pipe 11, and then sprays it out through the first nozzle 12. The second plastic liquid pump draws out the plastic liquid and delivers it to the second delivery pipe 17, and then sprays it out through the second nozzle 18. The plastic liquid sprayed through the first nozzle 12 is sprayed on the outside of the spiral corrugated pipe, and the plastic liquid sprayed through the second nozzle 18 is sprayed on the inner wall of the spiral corrugated pipe.

[0096] To maintain the stable position of the support 15 within the helical bellows and prevent it from detaching from the bellows due to excessively fast or slow speeds, the following conditions apply:

[0097] In the first case, under stable conditions, the second iron plate 27 corresponds to the electromagnet 33, as shown in the attached diagram. Figure 12 Therefore, under magnetic attraction, the second iron plate 27 can be driven to move upward. The second iron plate 27 drives the guide rod 34 and the conical rod 35 to move upward. The conical rod 35 abuts against the connecting rod 36, causing the connecting rod 36 to rotate outward to the left and right. At the same time, the connecting rod 36 drives the arc-shaped plate 37 to block the laser emitted by the laser rangefinder 38 (initially, the laser emitted by the laser rangefinder 38 is blocked by the baffle 39, see attached). Figure 12 (The situation on the left), so when the arc-shaped piece 37 blocks the laser emitted by the laser rangefinder 38 below the second iron plate 27, the measured distance becomes shorter (the distance between the original baffle 39 is switched to the distance between the arc-shaped piece 37). Therefore, the control module 42 determines that the bracket 15 is in a stable position in the spiral bellows, maintains the speed of the first motor 6 and the second motor 22, and then performs stable spraying of plastic liquid.

[0098] The second method is detailed in the appendix. Figure 13If the support 15 is positioned too far back due to the rotational speed of the first motor 6 or the second motor 22, and cannot reach the output speed of the spiral bellows, then over a long period of time, the support 15 is likely to fall off the tail of the spiral bellows (because the output speed of the spiral conveyor pipe is greater than the crawling speed of the track 25).

[0099] Therefore, at this time, the third iron plate 28 corresponds to the electromagnet 33. So, based on the same principle, when the arc-shaped piece 37 blocks the laser emitted by the laser rangefinder 38 below the third iron plate 28, the measured distance becomes shorter (from the original distance between the plate and the baffle 39 to the distance between the plate and the arc-shaped piece 37). Therefore, the control module 42 determines that the support 15 cannot be stable, so it accelerates the speed of the second motor 22, causing the track 25 to crawl faster until the second iron plate 27 corresponds to the electromagnet 33.

[0100] The third method, see attached document. Figure 14 If the support 15 is positioned too far forward due to the rotational speed of the first motor 6 or the second motor 22, and the crawling speed of the track 25 exceeds the output speed of the spiral bellows, the support 15 is likely to fall off the top of the spiral bellows over time (because the output speed of the spiral conveyor is less than the crawling speed of the track 25). Therefore, at this time, the first iron plate 26 corresponds to the electromagnet 33. Based on the same principle, when the arc-shaped plate 37 blocks the laser emitted by the laser ranging sensor 38 below the first iron plate 26, the measured distance becomes shorter (from the original distance between the support plate 39 and the distance between the support plate 37 and the arc-shaped plate 37). Therefore, the control module 42 determines that the support 15 is unstable and accelerates the rotational speed of the second motor 22, causing the track 25 to crawl faster until the first iron plate 26 corresponds to the electromagnet 33.

[0101] In this embodiment, the three laser rangefinders 38 are numbered differently, so the control module 42 can analyze and control the three laser rangefinders 38.

[0102] Example 2

[0103] The difference between this embodiment and embodiment one is that in this embodiment, a hanging rope 30 is fixedly connected to the bottom of the support frame, and a counterweight 31 is fixedly connected to the bottom of the hanging rope 30.

[0104] Specifically, the counterweight 31 is set vertically to the ground, so it can increase the weight of the support 15, so that the support 15 is held stably in the spiral corrugated pipe and the support 15 will not shift in the spiral corrugated pipe. The counterweight 31 can be a lead block, and the specific weight can be set according to the actual situation.

[0105] Example 3

[0106] The difference between this embodiment and embodiment one is that an air supply pipe 8 is also fixedly connected to the outside of the ring frame 2, and multiple sets of nozzles 9 are fixedly connected to the outside of the air supply pipe 8. An air inlet pipe 10 is also fixedly connected to the air supply pipe 8.

[0107] The air inlet pipe 10 is fixedly connected to the output end of a hot air blower located in the outside, and is used to output hot air, which is then sprayed out through the nozzle 9. The hot air sprayed out through the nozzle 9 is used to dry the plastic liquid outside the spiral insulation pipe.

[0108] In conclusion,

[0109] 1. Compared with the prior art, in this invention, the conveying assembly can continuously convey a long spiral insulation pipe to the ring frame 2. Then, the crawling assembly allows the support 15 to continuously crawl towards the spiral corrugated pipe, keeping the spiral corrugated pipe and the support 15 relatively stationary. Then, the first and second spraying assemblies can simultaneously coat the outside and inside of the spiral corrugated pipe. Therefore, in this invention, spiral corrugated pipes of any length can be coated without clamping them, thus improving coating efficiency.

[0110] 2. Compared with the prior art, in this invention, when the bracket 15 is in a stable state, the second iron plate 27 corresponds to the electromagnet 33. Therefore, under magnetic attraction, the second iron plate 27 can be driven to move upward. The second iron plate 27 drives the guide rod 34 and the conical rod 35 to move upward. The conical rod 35 abuts against the connecting rod 36, so the connecting rod 36 rotates to the left and right sides. At the same time, the connecting rod 36 drives the arc plate 37 to block the laser emitted by the laser rangefinder 38. Therefore, the control module 42 determines that the bracket 15 is in a stable position in the spiral bellows, maintains the speed of the first motor 6 and the second motor 22, and then performs stable spraying of plastic liquid, which plays the role of stabilizing the bracket 15.

[0111] 3. Compared with the prior art, in this invention, if the crawling speed of the support 15 is too fast or too slow, the first iron plate 26 or the third iron plate 28 will correspond to the electromagnet 33 in time. Therefore, the control module 42 can also adjust the crawling speed of the support 15 in time by adjusting the speed of the second motor 22, so that the support 15 is stably kept in the spiral corrugated pipe.

[0112] 4. Compared with the prior art, in this invention, by setting a counterweight 31, which is perpendicular to the ground, the weight of the support 15 can be increased, so that the support 15 can be stably held in the spiral corrugated pipe and the support 15 will not shift in the spiral corrugated pipe. The counterweight 31 can be a lead block, and the specific weight can be set according to the actual situation.

[0113] 5. Compared with the prior art, in this invention, hot air can be output through the provided air supply pipe 8 and nozzle 9, and then sprayed out through the nozzle 9. The hot air sprayed out through the nozzle 9 is used to dry the plastic liquid on the outside of the spiral insulation pipe.

[0114] 6. Compared with the prior art, in this invention, the cylinder 21 pushes the adjusting frame 23 to move outward, so that the track 25 is in close contact with the inner wall of the spiral corrugated pipe, and the second motor 22 is used to drive the rotating roller 24 to rotate, so that the rotating roller 24 drives the track 25 to drive the transmission, so that the support 15 can crawl on the inner wall of the spiral conveying pipe through the crawling of the track 25.

[0115] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0116] Although embodiments of the invention have been shown and described, the scope of the invention will be defined by the appended claims and their equivalents by those skilled in the art.

Claims

1. A coating mechanism for processing polyethylene spiral corrugated pipes, characterized in that, include A frame (1) is fixedly connected to a ring frame (2); A conveying assembly, which is disposed in a ring frame (2), is used to convey the spiral corrugated pipe; A bracket (15) is located in a helical bellows; A crawling assembly is disposed outside the support (15) to drive the support (15) to crawl in the spiral corrugated pipe; The first spraying assembly is disposed outside the annular frame (2) and is used to spray the plastic liquid onto the outer wall of the spiral corrugated pipe. The second spraying assembly is disposed outside the bracket (15) and is used to spray the plastic liquid onto the inner wall of the spiral corrugated pipe. Synchronous operation control unit, which is used to locate and determine the position of the bracket (15) in the spiral bellows; An electrical box (19) is fixedly connected to the outside of the bracket (15), and a support plate (20) is fixedly connected to the outside of the electrical box (19). Three sets of fixing rings (29) are fixedly connected to the support plate (20). The synchronous operation control unit includes a fixed frame (14) fixedly connected to the outside of the ring frame (2), an electromagnet (33) fixedly connected to the bottom of the fixed frame (14), a guide rod (34) located in the fixed ring (29), a tapered rod (35) fixedly connected to the outside of the guide rod (34), a connecting rod (36) rotatably connected to the fixed ring (29), an arc-shaped plate (37) fixedly connected to the outside of the connecting rod (36), a laser rangefinder (38) fixedly connected to the fixed ring (29), a control module (42) set in the electrical box (19), and a first [unclear] set above the fixed ring (29). A first iron plate (26), a second iron plate (27), and a third iron plate (28) are provided. The inner wall of the fixing ring (29) is fixedly connected to the position of the laser rangefinder (38). The first iron plate (26), the second iron plate (27), and the third iron plate (28) are fixedly connected to the corresponding guide rods (34). A circular plate (32) is fixedly connected to the bottom of the guide rod (34). A spring (40) is connected between the circular plate (32) and the support plate (20). The laser rangefinder (38) and the second motor (22) are electrically coupled to the control module (42).

2. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 1, characterized in that, The conveying assembly includes multiple electric push rods (3) fixedly connected to the ring frame (2), a mounting frame (4) fixedly connected to the piston rod of the electric push rod (3), and a conveying roller (5) rotatably connected in the mounting frame (4). A first motor (6) is also fixedly connected to the outside of the mounting frame (4), and the drive shaft of the first motor (6) is fixedly connected to the conveying roller (5).

3. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 2, characterized in that, The crawling assembly includes multiple sets of cylinders (21) fixedly connected to the outside of the bracket (15), an adjustment frame (23) fixedly connected to the outside of the piston rod of the cylinder (21), multiple sets of rotating rollers (24) rotatably connected to the adjustment frame (23), and a track (25) sleeved on the outside of the rotating rollers (24). The adjustment frame (23) has an external second motor (22), and the drive shaft of the second motor (22) is fixedly connected to the rotating rollers (24).

4. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 3, characterized in that, The first spraying assembly includes a first conveying pipe (11) fixedly connected to the outside of the ring frame (2) and multiple sets of first nozzles (12) fixedly connected to the first conveying pipe (11). A feed pipe (13) is fixedly connected in the first conveying pipe (11). A storage box is also provided outside the frame (1). A first plastic liquid pump is provided on the storage box. The output end of the first plastic liquid pump is fixedly connected to the feed pipe (13). A pipe is fixedly connected to the input end of the first plastic liquid pump, and the pipe extends into the storage box.

5. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 4, characterized in that, The second spraying assembly includes a storage tank (16) fixedly connected to the outside of the bracket (15), a second delivery pipe (17) fixedly connected to the outside of the storage tank (16), and multiple sets of second nozzles (18) fixedly connected to the outside of the second delivery pipe (17). A second plastic pump is fixedly connected to the outside of the storage tank (16). The output end of the second plastic pump is fixedly connected to the second delivery pipe (17). The input end of the second plastic pump is fixedly connected to a pipe, and the pipe extends into the storage tank (16).

6. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 5, characterized in that, The frame (1) is also provided with a conveyor belt body (7) on one side; the connecting rod (36) is rotatably connected to the fixed ring (29) through the hinge seat, the hinge seat is rotatably connected with a rotating shaft, and the outside of the rotating shaft is fitted with a torsion spring (41).

7. A coating mechanism for processing polyethylene spiral corrugated pipes according to claim 6, characterized in that, The bottom of the bracket (15) is fixedly connected to a hanging rope (30), and the bottom of the hanging rope (30) is fixedly connected to a counterweight (31).

8. The coating mechanism for processing polyethylene spiral corrugated pipes according to claim 7, characterized in that, An air supply pipe (8) is fixedly connected to the outside of the ring frame (2), and multiple sets of nozzles (9) are fixedly connected to the outside of the air supply pipe (8). An air inlet pipe (10) is also fixedly connected to the air supply pipe (8).

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