Metal pipeline glass fiber reinforced plastic internal anti-corrosion device and operation method

Abstract

The invention relates to the technical field of metal pipeline internal corrosion prevention, in particular to a metal pipeline glass fiber reinforced plastic internal corrosion prevention device and an operation method. Comprising a coating pipeline A, a coating pipeline B and a cable which are arranged side by side, and a protective pipe wrapping the outer sides of the coating pipeline A, the coating pipeline B and the cable, one end of the protective pipe is connected with a control module, and the other end of the protective pipe is detachably connected with a reverse jet flow purging head or a spraying module. Through the application of the glass fiber mesh pipe, the adhesive force of the anti-corrosion material attached to the inner wall of the pipeline is improved, the adhesiveness is good, the anti-corrosion material is not prone to falling off, the anti-corrosion effect in the continuous pipe is improved, and long-distance continuous glass fiber reinforced plastic inner corrosion prevention can be conducted on the inner walls of pipelines of various specifications.

Description

Technical Field

[0001] The invention relates to the technical field of internal corrosion protection of metal pipelines, and in particular to a device for internal corrosion protection of glass fiber reinforced plastics (FRP) metal pipelines and an operating method thereof. Background Art

[0002] At present, the oil, gas and water pipelines in oil fields have been eroded by impurities such as sand for a long time, and have been perforated by corrosive liquids. FRP pipelines have good corrosion resistance and wear resistance, but they are prone to breakage under the influence of geological changes, rain erosion, external forces and other factors. At the same time, the exposure of pipelines accelerates aging and reduces the service life of pipelines. Metal pipelines have strong resistance to external forces but poor corrosion resistance and wear resistance. There are many composite pipelines with relatively mature technology, but there is no FRP lined anti-corrosion pipeline technology suitable for oil field production, especially continuous pipeline FRP internal anti-corrosion technology.

[0003] Pipeline anti-corrosion refers to measures to slow down or prevent the pipeline from being corroded and deteriorated by the chemical and electrochemical effects of internal and external media or by the metabolic activities of microorganisms. In order to increase the service life of the pipeline, it is necessary to slow down the corrosion of the pipeline by soil, air and the transported medium (oil, natural gas, etc.). Most pipelines for transporting oil and gas are in complex soil environments, and the transported media are also corrosive, so both the inner and outer walls of the pipeline may be corroded. Once the pipeline is corroded and perforated, it will cause oil and gas leakage, which will not only cause oil and gas losses, but also pollute the environment, and may even cause fires and production safety accidents.

[0004] Through searching, the comparison with the existing patent technology is as follows:

[0005] Chinese patent CN201520100663.0 discloses a device for spraying an anticorrosion and wear-resistant layer on the inner and outer surfaces of a pipeline, which includes a pipeline rotating platform, an outer spraying device, and an inner spraying device. The outer spraying device and the inner spraying device are respectively matched with the pipeline arranged on the pipeline rotating platform. The pipeline rotating platform includes a main track, a fixed platform, and a mobile platform. The fixed platform is fixedly arranged at one end of the main track, and the mobile platform is arranged at the other end of the main track. The mobile platform can move back and forth on the main track through a supporting roller. When spraying the inner surface of the pipeline, a multi-section wall rope row telescopic mechanism is used to drive the inner nozzle to move along the axis of the pipeline, and the nozzle is suspended by a traction wire. For spraying long pipelines, the nozzle can be effectively prevented from sagging and the inner wall can be sprayed evenly; compared with ordinary nozzle pull rods, the multi-section wall rope row telescopic mechanism can greatly save space and reduce costs. However, in the process of protecting the inside of the pipeline, although the purpose of anticorrosion can be achieved, the surface of the coating has spiral connection lines, and sometimes there will be parts that are not coated. Once the spray gun is stopped, paint will condense inside and is difficult to clean, so the paint needs to be smoothed manually. Manual smoothing is time-consuming, labor-intensive and inefficient. At the same time, in the process of smoothing the anti-corrosion material on the inner wall of the pipeline, since the anti-corrosion material is solidified on the inner wall of the pipeline, the solidified anti-corrosion material may fall off, so the quality of manual smoothing is low.

[0006] Chinese patent CN102847636B discloses a self-propelled pipeline internal anti-corrosion layer detection and spraying vehicle, including a frame, a driving wheel, a brake block, an electric spark leak detector and a spraying trolley, the driving wheel is installed at one end of a driving wheel support arm through a pin shaft, the middle part of the driving wheel support arm is rotatably installed on a first rotating shaft, the other end of the driving wheel support arm is connected to a sliding sleeve through a hinge, and the driving wheel is connected to a driving device; the brake block is installed at one end of the brake block support arm through a pin shaft, the middle part of the brake block support arm is rotatably installed on a second rotating shaft, and the other end of the brake block support arm is connected to the sliding sleeve through a hinge; the sliding sleeve is slidably mounted on a hollow shaft, the hollow shaft is fixedly mounted on the frame, an electric push rod is located in the hollow shaft, and the moving end of the electric push rod is linked to the sliding sleeve; an electric spark coil is installed on the frame, an annular guide rail is installed on one side of the frame, and the spraying trolley is slidably mounted on the annular guide rail. Although the present invention has the function of leak detection and repairing the anti-corrosion layer inside the pipeline, it is only suitable for large-diameter pipelines and does not have the function of cleaning the inside of the pipeline. Glass wire mesh pipes cannot be laid on the inner wall of the pipeline, the anti-corrosion layer is thin, and the anti-corrosion effect is poor.

[0007] Chinese patent CN111744708A discloses an anti-corrosion spraying mechanism of an anti-corrosion device in a pipeline, wherein the anti-corrosion spraying mechanism includes an automatic spraying mechanism, a rotary drive mechanism, and an automatic smoothing mechanism. The automatic spraying mechanism includes a spray head, the automatic spraying mechanism is arranged on the rotary drive mechanism, the rotary drive mechanism drives the automatic spraying mechanism to rotate, the automatic smoothing mechanism is arranged on the rotary drive mechanism, the rotary drive mechanism drives the automatic smoothing mechanism to rotate, and the automatic smoothing mechanism is provided with a detachable smoothing scraper and a vibrating wheel. Although the present invention can automatically smooth the anti-corrosion material on the inner wall of the pipeline through the automatic smoothing mechanism, the invention is only suitable for large-diameter pipelines, does not have the internal cleaning function of the pipeline, the inner wall of the pipeline cannot be laid with a glass wire mesh tube, the anti-corrosion layer is thin, the anti-corrosion effect is poor, and the structure is complex and the manufacturing cost is high. Summary of the invention

[0008] The technical solution adopted by the present invention to solve the technical problem is:

[0009] A metal pipe fiberglass internal anti-corrosion device, comprising a paint pipe A, a paint pipe B and a cable arranged side by side, and a protective pipe wrapped around the outside of the three, wherein a glass wire mesh pipe is sleeved on the outside of the protective pipe;

[0010] One end of the protection tube is connected to a control module, and the other end is detachably connected to a reverse jet purge head or a spray module.

[0011] Furthermore, the control module includes an air compressor, a power distribution cabinet, and a paint tank A and a paint tank B arranged side by side, and a valve A and a valve B are respectively arranged at the bottom of the paint tank A and the paint tank B;

[0012] A liquid inlet pipeline A is provided between the paint pipeline A and the valve A, and a plunger pump A is provided on the liquid inlet pipeline A;

[0013] A liquid inlet pipeline B is provided between the paint pipeline B and the valve B, and a plunger pump B is provided on the liquid inlet pipeline B;

[0014] An air outlet valve is provided between the paint pipeline B and the air compressor.

[0015] Furthermore, the reverse jet purge head is overall spindle-shaped, and a plurality of evenly distributed air nozzles are arranged in the middle, and a connector for connecting to a protective tube is arranged at one end of the reverse jet purge head.

[0016] As an optimization, 3 to 12 air nozzles are provided, the axis of the air nozzle and the axis of the reverse jet purge head form an angle of 30° to 45°, and the joint is a hexagonal internal thread joint.

[0017] Furthermore, the spraying module includes a drying component, a scraper ring, a roller brush head, a nozzle and a mixer which are connected in sequence from left to right. The mixer is connected to the protective pipe and communicates with the paint pipeline A and the paint pipeline B.

[0018] Furthermore, the drying assembly includes a plurality of universal joints connected in series, and a dryer sleeved on the outside of the universal joints.

[0019] As an optimization, the dryer is an ultraviolet dryer.

[0020] As an optimization, spiral blades are arranged circumferentially on the roller brush head.

[0021] As an optimization, the nozzle is a circular tube type, and 6-12 spray nozzles are arranged circumferentially in the center of the nozzle.

[0022] As an optimization, the mixer is of a hollow frustum type, and an external thread connected to the nozzle is provided at the left end, and an internal thread connected to the protective pipe is provided at the right end.

[0023] Furthermore, the input end of the power distribution cabinet is connected to the live wire and the neutral wire, the output end of the power distribution cabinet is connected to the cable, and four control lines are arranged inside the power distribution cabinet;

[0024] The cables are respectively connected to the air compressor, the plunger pump A, the plunger pump B and the dryer.

[0025] Furthermore, it also includes a roller for rolling up the protective tube and the glass wire mesh tube.

[0026] An operating method of a metal pipe glass fiber reinforced plastic internal anti-corrosion device comprises the following steps:

[0027] S1: The operator puts on labor protection equipment, fills paint tank A and paint tank B with paint A and paint B respectively, places the metal pipe horizontally and aligns it with a metal pipe fiberglass internal anti-corrosion device;

[0028] S2: Select the reverse jet purge head and connect it to the protective tube. Bind the glass mesh tube to the outside of the protective tube. Place the reverse jet purge head into the right end of the metal pipe and open the air outlet valve.

[0029] S3: Switch on the power distribution cabinet and start the air compressor. The compressed air passes through the air compressor, the air outlet valve, and the paint pipe B to the reverse jet purge head, and is ejected through the air nozzle. The high-pressure airflow ejected obliquely to the rear drives the reverse jet purge head to move forward in the metal pipe, and then moves the glass wire mesh tube, the protective tube, the cable, the paint pipe A and the paint pipe B from right to left in the metal pipe, and blows out the impurities in the metal pipe at the same time. At this time, the roller passively rotates clockwise;

[0030] S4: After the reverse jet purge head moves to the left end of the metal pipe, turn off the air compressor, remove the reverse jet purge head, cut the glass mesh tube from the right end, and turn the left and right ends of the glass mesh tube outward to connect and bind them to the left and right ends of the metal pipe;

[0031] S5: Select the spray module and connect it with the protective pipe, connect the paint pipe A and the paint pipe B with the mixer, close the air outlet valve, open valve A and valve B, start the dryer, plunger pump A and plunger pump B, rotate the roller counterclockwise to make the spray module move from left to right in the metal pipe, paint A is pressurized by the plunger pump A and passes through the paint pipe A to the mixer, paint B is pressurized by the plunger pump B and passes through the paint pipe B to the mixer, paint A and paint B are mixed in the mixer and transported to the nozzle, the mixed liquid passes through the spray nozzle and the glass wire mesh tube and is sprayed onto the inner wall of the metal pipe, the mixed liquid of paint A and paint B is scraped and brushed by the scraper ring and the spiral blades of the roller brush head, so that the paint and the glass wire mesh tube are further evenly attached to the inner wall of the metal pipe, and the paint is quickly condensed and firmly solidified under the action of the dryer;

[0032] S6: The steps in S4 and S5 are repeated in a loop to continuously perform the glass fiber reinforced plastic internal anti-corrosion treatment on the inner walls of the remaining metal pipes.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention selects to connect the reverse jet purge head or the spray module according to the operation method, operates flexibly in the pipeline, can realize automatic spraying operation, and improves the anti-corrosion efficiency in the pipeline;

[0035] 2. The present invention uses the spiral blades of the spiral rolling brush head and the scraping ring to make the coating more uniform, improve the spraying effect of the anti-corrosion material on the inner wall of the pipeline, so as to make the inner wall of the pipeline smooth, prevent the impact of the flow force on the raised anti-corrosion material during the flow of oil, realize automatic smoothing, and improve the smoothing efficiency;

[0036] 3. The present invention improves the adhesion of the anti-corrosion material to the inner wall of the pipeline through the application of glass wire mesh pipe. The material has good adhesion and is not easy to fall off. It has the corrosion resistance and wear resistance of glass fiber reinforced plastic pipelines, improves the anti-corrosion effect inside continuous pipes, and can be used for long-distance continuous glass fiber reinforced plastic internal anti-corrosion of the inner walls of pipelines of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the purge pipeline structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the anti-corrosion structure inside the spray pipeline of the present invention.

[0039] 1. Reverse jet purge head, 2. Universal joint, 3. Dryer, 4. Scraper ring, 5. Roller brush head, 6. Nozzle, 7. Mixer, 8. Glass wire mesh tube, 9. Cable, 10. Paint pipeline A, 11. Paint pipeline B, 12. Roller, 13. Protective tube, 14. Plunger pump B, 15. Liquid inlet pipeline B, 16. Valve B, 17. Plunger pump A, 18. Liquid inlet pipeline A, 19. Valve A, 20. Air outlet valve, 21. Air compressor, 22. Power distribution cabinet, 23. Paint tank B, 24. Paint tank A, 25. Metal pipeline;

[0040] 1-1, air nozzle, 1-2, joint; 5-1, spiral blade; 6-1, spray nozzle;

[0041] L, live wire, N, neutral wire. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] Embodiment 1:

[0046] like Figure 1 and Figure 2The shown metal pipe 25 fiberglass internal anti-corrosion device comprises a paint pipe A10, a paint pipe B11 and a cable 9 arranged side by side, and a protective pipe 13 wrapped around the outside of the three, and a glass wire mesh pipe 8 is sleeved on the outside of the protective pipe 13;

[0047] One end of the protection tube 13 is connected to the control module, and the other end is detachably connected to the reverse jet purge head 1 or the spray module.

[0048] The reverse jet purge head 1 can not only remove dust from the inside of the metal pipe 25, but also bring the paint pipe A10, paint pipe B11, cable 9, protective pipe 13 and glass mesh pipe 8 into the metal pipe 25, paving the way for subsequent spraying operations.

[0049] In this embodiment, the control module includes an air compressor 21, a power distribution cabinet 22, and a paint tank A24 and a paint tank B23 arranged side by side, and the bottoms of the paint tanks A24 and B23 are respectively provided with valves A19 and valves B16;

[0050] A liquid inlet pipeline A18 is provided between the paint pipeline A10 and the valve A19, and a plunger pump A17 is provided on the liquid inlet pipeline A18;

[0051] A liquid inlet pipeline B15 is provided between the paint pipeline B11 and the valve B16, and a plunger pump B14 is provided on the liquid inlet pipeline B15;

[0052] An air outlet valve 20 is provided between the paint pipeline B11 and the air compressor 21 .

[0053] In this embodiment, the reverse jet purge head 1 is spindle-shaped as a whole, and a plurality of evenly distributed air nozzles 1 - 1 are arranged in the middle. A connector 1 - 2 for connecting with a protective tube 13 is arranged at one end of the reverse jet purge head 1 .

[0054] In this embodiment, the spraying module includes a drying component, a scraper ring 4, a roller brush head 5, a nozzle 6 and a mixer 7 connected from left to right in sequence. The mixer 7 is connected to the protective tube 13 and is connected to the paint pipeline A10 and the paint pipeline B11.

[0055] In this embodiment, the drying assembly includes a plurality of universal joints 2 connected in series, and a dryer 3 sleeved on the outside of the universal joints 2 .

[0056] In this embodiment, the input end of the power distribution cabinet 22 is connected to the live wire L and the neutral wire N, the output end of the power distribution cabinet 22 is connected to the cable 9, and four control lines are arranged inside the power distribution cabinet 22;

[0057] The cable 9 is connected to the air compressor 21 , the plunger pump A17 , the plunger pump B14 and the dryer 3 respectively.

[0058] In this embodiment, a roller 12 for rolling up the protective tube 13 and the glass mesh tube 8 is also included.

[0059] Embodiment 2:

[0060] This embodiment is basically the same as Embodiment 1, except that:

[0061] In this embodiment, 3 to 12 air nozzles 1-1 are provided, the axis of the air nozzle 1-1 forms an angle of 30° to 45° with the axis of the reverse jet purge head 1, and the joint 1-2 is a hexagonal internal thread joint 1-2.

[0062] In this embodiment, the dryer 3 is an ultraviolet dryer 3 .

[0063] In this embodiment, the roller brush head 5 is circumferentially provided with spiral leaves 5 - 1 .

[0064] In this embodiment, the nozzle 6 is a circular tube type, and 6 to 12 spray nozzles 6 - 1 are circumferentially arranged in the center of the nozzle 6 .

[0065] In this embodiment, the mixer 7 is a hollow truncated cone, and is provided with an external thread connected to the nozzle 6 at the left end, and an internal thread connected to the protection tube 13 at the right end.

[0066] An operating method of a metal pipe 25 glass fiber reinforced plastic internal anti-corrosion device comprises the following steps:

[0067] S1: The operator puts on labor protection equipment, fills the paint tank A24 and the paint tank B23 with paint A and paint B respectively, places the metal pipe 25 horizontally and aligns it with a glass fiber reinforced plastic internal anti-corrosion device of the metal pipe 25;

[0068] S2: Select the reverse jet purge head 1 and connect it to the protection tube 13. Bind the glass mesh tube 8 to the outside of the protection tube 13. Put the reverse jet purge head 1 into the right end of the metal pipe 25 and open the air outlet valve 20.

[0069] S3: Switch on the power distribution cabinet 22 to supply power and start the air compressor 21. The compressed air passes through the air compressor 21, the air outlet valve 20, and the paint pipe B11 to the reverse jet purge head 1, and is ejected through the air nozzle 1-1. The high-pressure airflow ejected obliquely to the rear drives the reverse jet purge head 1 to move forward in the metal pipe 25, and then drives the glass wire mesh tube 8, the protective tube 13, the cable 9, the paint pipe A10 and the paint pipe B11 to move from right to left in the metal pipe 25, and at the same time blows out the impurities in the metal pipe 25. At this time, the roller 12 passively rotates clockwise;

[0070] S4: After the reverse jet purge head 1 moves to the left end of the metal pipe 25, the air compressor 21 is turned off, and the reverse jet purge head 1 is removed, the glass mesh tube 8 is cut off from the right end, and the left and right ends of the glass mesh tube 8 are turned outward and connected to the left and right ends of the metal pipe 25;

[0071] S5: Select the spraying module and connect it with the protection pipe 13, connect the paint pipe A10 and the paint pipe B11 with the mixer 7, close the air outlet valve 20, open the valve A19 and the valve B16, start the dryer 3, the plunger pump A17 and the plunger pump B14, rotate the roller 12 counterclockwise, and make the spraying module move from left to right in the metal pipe 25. The paint A is pressurized by the plunger pump A17 and passes through the paint pipe A10 to the mixer 7. The paint B is pressurized by the plunger pump B14 and passes through the paint pipe B11 to the mixer 7. The paint A and the paint B are mixed in the mixer 7 and then transported to the nozzle 6. The mixed liquid passes through the spray nozzle 6-1 and the glass wire mesh tube 8 and is sprayed onto the inner wall of the metal pipe 25. The mixed liquid of the paint A and the paint B is scraped and brushed by the scraper ring 4 and the spiral blade 5-1 of the roller brush head 5, so that the paint and the glass wire mesh tube 8 are further evenly attached to the inner wall of the metal pipe 25. Under the action of the dryer 3, the paint is quickly condensed and firmly solidified.

[0072] S6: The steps in S4 and S5 are repeated in a loop to continuously perform the glass fiber reinforced plastic internal anti-corrosion treatment on the inner walls of the remaining metal pipes 25 .

[0073] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific implementations. Any appropriate changes or modifications made to them by ordinary technicians in the technical field that conform to the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A metal pipe fiberglass internal anti-corrosion device, characterized by: It includes a paint pipeline A, a paint pipeline B and a cable arranged side by side, and a protective tube wrapped around the outside of the three, and a glass wire mesh tube is sleeved on the outside of the protective tube; One end of the protection tube is connected to a control module, and the other end is detachably connected to a reverse jet purge head or a spray module.

2. The metal pipe FRP internal anti-corrosion device according to claim 1 is characterized by: The control module includes an air compressor, a power distribution cabinet, and a paint tank A and a paint tank B arranged side by side, wherein valves A and valves B are respectively arranged at the bottom of the paint tank A and the paint tank B; A liquid inlet pipeline A is provided between the paint pipeline A and the valve A, and a plunger pump A is provided on the liquid inlet pipeline A; A liquid inlet pipeline B is provided between the paint pipeline B and the valve B, and a plunger pump B is provided on the liquid inlet pipeline B; An air outlet valve is provided between the paint pipeline B and the air compressor.

3. The metal pipe fiberglass internal anti-corrosion device according to claim 2 is characterized in that: The reverse jet purge head is spindle-shaped as a whole, and a plurality of evenly distributed air nozzles are arranged in the middle. One end of the reverse jet purge head is provided with a joint for connecting with a protective pipe.

4. The metal pipe fiberglass internal anti-corrosion device according to claim 3 is characterized by: The number of the air jet nozzles is 3 to 12, the axis of the air jet nozzle and the axis of the reverse jet purge head form an angle of 30° to 45°, and the joint is a hexagonal internal thread joint.

5. The metal pipe fiberglass internal anti-corrosion device according to claim 3 is characterized by: The spraying module includes a drying component, a scraper ring, a roller brush head, a nozzle and a mixer which are connected in sequence from left to right. The mixer is connected to a protective pipe and communicates with a paint pipeline A and a paint pipeline B.

6. The metal pipe fiberglass internal anti-corrosion device according to claim 5 is characterized in that: The drying assembly comprises a plurality of universal joints connected in series and a dryer sleeved on the outer sides of the universal joints.

7. The metal pipe fiberglass internal anti-corrosion device according to claim 6 is characterized in that: The drying device is an ultraviolet drying device.

8. The metal pipe fiberglass internal anti-corrosion device according to claim 5 is characterized by: The rolling brush head is circumferentially provided with spiral leaves.

9. The metal pipe fiberglass internal anti-corrosion device according to claim 5, characterized in that: The nozzle is a circular tube type, and 6 to 12 spray nozzles are arranged circumferentially in the center of the nozzle.

10. The metal pipe fiberglass internal anti-corrosion device according to claim 5, characterized in that: The mixer is a hollow truncated cone type, and is provided with an external thread connected to the spray head at the left end, and an internal thread connected to the protective pipe at the right end.

11. The metal pipe fiberglass internal anti-corrosion device according to claim 6, characterized in that: The input end of the power distribution cabinet is connected to the live wire and the neutral wire, the output end of the power distribution cabinet is connected to the cable, and four control lines are arranged inside the power distribution cabinet; The cables are respectively connected to the air compressor, the plunger pump A, the plunger pump B and the dryer.

12. The metal pipe fiberglass internal anti-corrosion device according to claim 11, characterized in that: It also includes rollers for rolling up the protective tube and the glass mesh tube.

13. An operating method of a metal pipe glass fiber reinforced plastic internal anti-corrosion device, characterized in that: The following steps are involved: S1: The operator puts on labor protection equipment, fills paint tank A and paint tank B with paint A and paint B respectively, places the metal pipe horizontally and aligns it with a metal pipe fiberglass internal anti-corrosion device; S2: Select the reverse jet purge head and connect it to the protective tube. Bind the glass mesh tube to the outside of the protective tube. Place the reverse jet purge head into the right end of the metal pipe and open the air outlet valve. S3: Switch on the power distribution cabinet and start the air compressor. The compressed air passes through the air compressor, the air outlet valve, and the paint pipe B to the reverse jet purge head, and is ejected through the air nozzle. The high-pressure airflow ejected obliquely to the rear drives the reverse jet purge head to move forward in the metal pipe, and then moves the glass wire mesh tube, the protective tube, the cable, the paint pipe A and the paint pipe B from right to left in the metal pipe, and blows out the impurities in the metal pipe at the same time. At this time, the roller passively rotates clockwise; S4: After the reverse jet purge head moves to the left end of the metal pipe, turn off the air compressor, remove the reverse jet purge head, cut the glass mesh tube from the right end, and turn the left and right ends of the glass mesh tube outward to connect and bind them to the left and right ends of the metal pipe; S5: Select the spray module and connect it with the protective pipe, connect the paint pipe A and the paint pipe B with the mixer, close the air outlet valve, open valve A and valve B, start the dryer, plunger pump A and plunger pump B, rotate the roller counterclockwise to make the spray module move from left to right in the metal pipe, paint A is pressurized by the plunger pump A and passes through the paint pipe A to the mixer, paint B is pressurized by the plunger pump B and passes through the paint pipe B to the mixer, paint A and paint B are mixed in the mixer and transported to the nozzle, the mixed liquid passes through the spray nozzle and the glass wire mesh tube and is sprayed onto the inner wall of the metal pipe, the mixed liquid of paint A and paint B is scraped and brushed by the scraper ring and the spiral blades of the roller brush head, so that the paint and the glass wire mesh tube are further evenly attached to the inner wall of the metal pipe, and the paint is quickly condensed and firmly solidified under the action of the dryer; S6: The steps in S4 and S5 are repeated in a loop to continuously perform the glass fiber reinforced plastic internal anti-corrosion treatment on the inner walls of the remaining metal pipes.

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