Anti-corrosion structure of chemical petroleum pipeline

Abstract

The invention relates to the technical field of anti-corrosion structures, and discloses an anti-corrosion structure of a chemical petroleum pipeline, the anti-corrosion structure comprises a second anti-corrosion shell and the chemical petroleum pipeline, the upper surface of the second anti-corrosion shell is provided with two rectangular grooves communicating with the second anti-corrosion shell, and the front and rear surfaces of the second anti-corrosion shell are both provided with circular through grooves. The fixing assembly is arranged on the second anti-corrosion shell, the anti-corrosion assembly is arranged on the second anti-corrosion shell, the anti-corrosion assembly comprises two first protection boxes, and the two first protection boxes are fixedly connected to the left side and the right side of the second anti-corrosion shell correspondingly. The anti-corrosion coating can prevent soil from making direct contact with the surfaces of the pipelines for a long time, the falling speed of the anti-corrosion coating is reduced, the corrosion resistance of the chemical petroleum pipelines is improved, the situation that the joint of the two chemical petroleum pipelines makes direct contact with the soil is avoided, and the corrosion resistance of the joint of the two chemical petroleum pipelines is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion structures, in particular to an anti-corrosion structure for a chemical petroleum pipeline. Background Art

[0002] The gas transportation process requires the use of a dedicated oil and gas pipeline. When the pipeline is built and laid, it will be equipped with corresponding oil pump units according to the needs of the process flow, and a complete pipeline system will be designed. After laying, it can be used to perform oil access and transfer tasks. Since the oil and gas pipeline is generally transported in a closed environment underground, it has high safety.

[0003] The laying process of oil and gas pipelines is generally carried out underground. Soil is a special electrolyte. The presence of water and soluble salts enables the soil to conduct ions and has the characteristics of an electrolyte solution. Therefore, metals will undergo electrochemical corrosion in the soil. In the existing technology, anti-corrosion coatings are generally applied on the surface to increase corrosion resistance, but this effect will gradually weaken with the increase of usage time. In addition, long-term direct contact between the soil and the pipeline surface will also accelerate the shedding of the anti-corrosion coating and reduce the service life of chemical petroleum pipelines. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an anti-corrosion structure for a chemical petroleum pipeline, which solves the problem that in the prior art, corrosion resistance is generally increased by applying an anti-corrosion coating on the surface, but this effect will gradually weaken with the increase of usage time, and the soil will directly contact the pipeline surface for a long time, which will also accelerate the shedding speed of the anti-corrosion coating and reduce the service life of the chemical petroleum pipeline.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions: an anti-corrosion structure for a chemical petroleum pipeline, comprising a second anti-corrosion shell and a chemical petroleum pipeline, wherein the upper surface of the second anti-corrosion shell is provided with two rectangular grooves communicating with the second anti-corrosion shell, and the front and rear surfaces of the second anti-corrosion shell are both provided with circular through grooves;

[0008] A fixing assembly, the fixing assembly being arranged on the second anti-corrosion housing;

[0009] An anti-corrosion component, the anti-corrosion component is arranged on the second anti-corrosion shell, and the anti-corrosion component includes two first protection boxes, and the two first protection boxes are respectively fixedly connected to the left and right sides of the second anti-corrosion shell;

[0010] Wherein, the two first protection boxes are provided with T-shaped sliding grooves on the opposite surfaces, the inner walls of the two T-shaped sliding grooves are slidably connected with T-shaped sliders, the two T-shaped sliders are provided with fixing holes, and the inner walls of the two fixing holes are slidably connected with fixing rods;

[0011] The two fixing rods are fixedly connected to the inner wall of the corresponding T-shaped slide groove, and the opposite surfaces of the two T-shaped slide blocks are fixedly connected to the first anti-corrosion housing.

[0012] Preferably, the front surface of the first anti-corrosion shell is provided with an anti-corrosion sleeve, the rear surface of the anti-corrosion sleeve slides into the interior of the first anti-corrosion shell, the outer surface of the anti-corrosion sleeve is fixedly sleeved with a first fixed sleeve, and the front surface of the first fixed sleeve is provided with a first fixed magnet;

[0013] Among them, a mounting groove is opened on the rear surface of the first anti-corrosion shell, a second fixing sleeve is fixedly connected to the rear surface of the first protective box, and a second fixing magnet is arranged on the rear surface of the second fixing sleeve.

[0014] Preferably, the fixing assembly comprises two second protection boxes, and the two second protection boxes are fixedly connected to the upper surface of the first anti-corrosion shell;

[0015] The inner walls of the two second protection boxes are rotatably connected with bidirectional threaded rods, and the outer walls of the two bidirectional threaded rods are threadedly sleeved with movable sleeves.

[0016] Preferably, the lower surfaces of the two movable sleeves are fixedly connected with movable plates, the lower ends of the four movable plates slide through the inner walls of the corresponding rectangular grooves respectively, and the lower ends of the four movable plates are fixedly connected with concave fixed plates.

[0017] Preferably, four arc-shaped fixing plates are arranged inside the second anti-corrosion shell, and the outer surfaces of the four arc-shaped fixing plates are respectively fixedly connected to the corresponding concave fixing plates, and two fixing rods are arranged on the opposite surfaces of the two corresponding arc-shaped fixing plates on the left and right.

[0018] Preferably, arc grooves are formed on the upper surfaces of the four fixing rods, and the opposite ends of the four fixing rods slide through the outer surfaces of the corresponding arc fixing plates respectively, and the opposite ends of the four fixing rods are fixedly connected to the inner wall of the second anti-corrosion shell.

[0019] Preferably, a third protection box is fixedly connected to the left side of the first anti-corrosion housing, and the two second protection boxes are both connected to the third protection box;

[0020] The right ends of the two bidirectional threaded rods both penetrate into the interior of the third protection box and are rotatably connected to the inner wall of the third protection box.

[0021] Preferably, the outer walls of the two bidirectional threaded rods are fixedly sleeved with a turbine, the inner wall of the third protective box is fixedly connected with an L-shaped fixing plate, and the upper surface of the L-shaped fixing plate is fixedly connected with a connecting sleeve.

[0022] Preferably, the inner wall of the connecting sleeve is rotatably connected to a connecting shaft, and the front and rear surfaces of the connecting shaft are fixedly connected to worms, and the two worms are respectively meshed with the corresponding turbines.

[0023] Preferably, the front end of the worm gear located at the front side is rotatably connected to the inner wall of the third protection box;

[0024] The rear end of the worm gear at the rear side rotates and passes through the front surface of the third protective box;

[0025] Wherein, a connecting piece is fixedly connected to the rear end of the rear worm gear.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the present invention provides an anti-corrosion structure for a chemical petroleum pipeline, which has the following beneficial effects:

[0028] 1. The anti-corrosion structure of the chemical petroleum pipeline can not only avoid direct contact between the chemical petroleum pipeline and the soil by setting the anti-corrosion components, prevent the soil from directly contacting the pipeline surface for a long time, reduce the speed of anti-corrosion coating shedding, and improve the corrosion resistance of the chemical petroleum pipeline, but also avoid direct contact between the connection of two chemical petroleum pipelines and the soil, and improve the corrosion resistance of the connection of the two chemical petroleum pipelines.

[0029] 2. The anti-corrosion structure of the chemical petroleum pipeline is such that when the chemical petroleum pipeline enters the inner wall of the second anti-corrosion outer shell, the four arc-shaped grooves will contact the outer surface of the chemical petroleum pipeline, thereby supporting the chemical petroleum pipeline and facilitating the fixation of the chemical petroleum pipeline, thereby improving the stability of the chemical petroleum pipeline after fixation.

[0030] 3. The anti-corrosion structure of the chemical oil pipeline has two bidirectional threaded rods driving the two movable sleeves connected thereto to move to relative positions, and the four movable sleeves driving the concave fixed plates connected thereto to move to relative positions, thereby driving the two arc-shaped fixed plates correspondingly arranged on the left and right to move to relative positions to fix the chemical oil pipeline. The overall fixing process is simple and convenient, thereby improving the efficiency of installation and disassembly of the chemical oil pipeline.

[0031] 4. In the anti-corrosion structure of the chemical petroleum pipeline, four arc-shaped fixing plates can slide through the outer wall of the fixing rod, and the four fixing rods play an auxiliary role in the movement of the arc-shaped fixing plates, thereby improving the stability of the four arc-shaped fixing plates when moving and fixing.

[0032] 5. The anti-corrosion structure of the chemical petroleum pipeline can not only provide double corrosion protection for the chemical petroleum pipeline by providing the first anti-corrosion shell and the second anti-corrosion shell, but also improve the pressure resistance of the chemical petroleum pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the connection of two structures of the anti-corrosion structure of the chemical petroleum pipeline of the present invention;

[0034] Figure 2 This is a schematic diagram of the connection between two second anti-corrosion housings of the present invention;

[0035] Figure 3 This is a schematic diagram of the connection between the second fixing sleeve and the first protection box of the present invention;

[0036] Figure 4 It is a schematic diagram of the connection between the movable sleeve and the bidirectional threaded rod of the present invention;

[0037] Figure 5 This is a schematic diagram of the connection between the turbine and the worm of the present invention;

[0038] Figure 6 It is a schematic diagram of the connection between the concave fixing plate and the arc-shaped fixing plate of the present invention.

[0039] In the figure: 1. first anti-corrosion shell; 2. first fixed sleeve; 3. anti-corrosion sleeve; 4. second anti-corrosion shell; 5. first protective box; 6. T-shaped slider; 7. arc groove; 8. fixing rod; 9. second protective box; 10. third protective box; 11. mounting groove; 12. chemical oil pipeline; 13. second fixed sleeve; 14. concave fixing plate; 15. bidirectional threaded rod; 16. fixing hole; 17. T-shaped slide groove; 18. fixing rod; 19. moving plate; 20. rectangular groove; 21. moving sleeve; 22. turbine; 23. worm; 24. connecting shaft; 25. connecting sleeve; 26. L-shaped fixing plate; 27. arc fixing plate. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-6The present invention provides a new technical solution: an anti-corrosion structure of a chemical petroleum pipeline, comprising a second anti-corrosion shell 4 and a chemical petroleum pipeline 12, wherein the upper surface of the second anti-corrosion shell 4 is provided with two rectangular grooves 20 communicating therewith, and the front and rear surfaces of the second anti-corrosion shell 4 are both provided with circular through grooves, and a fixing component is arranged on the second anti-corrosion shell 4;

[0042] An anti-corrosion component, which is arranged on the second anti-corrosion housing 4. The anti-corrosion component includes two first protection boxes 5. The two first protection boxes 5 are respectively fixedly connected to the left and right sides of the second anti-corrosion housing 4;

[0043] The two first protection boxes 5 have T-shaped slide grooves 17 on their opposite surfaces, the inner walls of the two T-shaped slide grooves 17 are slidably connected with T-shaped sliders 6, the two T-shaped sliders 6 have fixing holes 16, and the inner walls of the two fixing holes 16 are slidably connected with fixing rods 18;

[0044] The two fixing rods 18 are both fixedly connected to the inner wall of the corresponding T-shaped sliding groove 17 , and the opposite surfaces of the two T-shaped sliding blocks 6 are fixedly connected to the first anti-corrosion housing 1 .

[0045] Furthermore, an anti-corrosion sleeve 3 is provided on the front surface of the first anti-corrosion shell 1, and the rear surface of the anti-corrosion sleeve 3 slides into the interior of the first anti-corrosion shell 1. The outer surface of the anti-corrosion sleeve 3 is fixedly sleeved with a first fixed sleeve 2, and the front surface of the first fixed sleeve 2 is provided with a first fixed magnet;

[0046] The rear surface of the first anti-corrosion shell 1 is provided with a mounting groove 11 , the rear surface of the first protective box 5 is fixedly connected with a second fixing sleeve 13 , and the rear surface of the second fixing sleeve 13 is provided with a second fixing magnet.

[0047] Further, the fixing assembly includes two second protection boxes 9, and the two second protection boxes 9 are fixedly connected to the upper surface of the first anti-corrosion housing 1;

[0048] The inner walls of the two second protection boxes 9 are both rotatably connected with the bidirectional threaded rods 15 , and the outer walls of the two bidirectional threaded rods 15 are both threadedly sleeved with the moving sleeves 21 .

[0049] Furthermore, the lower surfaces of the two movable sleeves 21 are fixedly connected with movable plates 19 , the lower ends of the four movable plates 19 slide through the inner walls of the corresponding rectangular grooves 20 , and the lower ends of the four movable plates 19 are fixedly connected with concave fixed plates 14 .

[0050] Furthermore, four arc-shaped fixing plates 27 are arranged inside the second anti-corrosion shell 4 , and the outer surfaces of the four arc-shaped fixing plates 27 are respectively fixedly connected to the corresponding concave fixing plates 14 , and two fixing rods 8 are arranged on the opposite surfaces of the two corresponding arc-shaped fixing plates 27 on the left and right.

[0051] Furthermore, arc grooves 7 are formed on the upper surfaces of the four fixing rods 8 , and the opposite ends of the four fixing rods 8 slide through the outer surfaces of the corresponding arc fixing plates 27 , and the opposite ends of the four fixing rods 8 are fixedly connected to the inner wall of the second anti-corrosion shell 4 .

[0052] Furthermore, a third protection box 10 is fixedly connected to the left side of the first anti-corrosion housing 1, and the two second protection boxes 9 are both connected to the third protection box 10;

[0053] The right ends of the two bidirectional threaded rods 15 both penetrate into the interior of the third protection box 10 , and are both rotatably connected to the inner wall of the third protection box 10 .

[0054] Furthermore, the outer walls of the two bidirectional threaded rods 15 are fixedly sleeved with turbines 22 , the inner wall of the third protective box 10 is fixedly connected with an L-shaped fixing plate 26 , and the upper surface of the L-shaped fixing plate 26 is fixedly connected with a connecting sleeve 25 .

[0055] Furthermore, the inner wall of the connecting sleeve 25 is rotatably connected to a connecting shaft 24 , and the front and rear surfaces of the connecting shaft 24 are fixedly connected to worms 23 , and the two worms 23 are respectively meshed with the corresponding turbines 22 .

[0056] Furthermore, the front end of the worm gear 23 at the front side is rotatably connected to the inner wall of the third protection box 10;

[0057] The rear end of the worm 23 at the rear side rotates and passes through the front surface of the third protective box 10;

[0058] The rear end of the rear worm gear 23 is fixedly connected with a connecting piece.

[0059] Further, when using the anti-corrosion structure of the chemical petroleum pipeline, when installing the chemical petroleum pipeline 12, firstly, the installation position is dug by an external tool to form an installation groove that is compatible with the first anti-corrosion shell 1;

[0060] The front end of the chemical oil pipeline 12 is then passed through the inner walls of the two circular through grooves in sequence, and then the staff connects it with the connecting piece through external work, and drives the worm 23 connected to it to rotate by rotating the connecting piece, and the worm 23 at the rear side drives another worm 23 to rotate through the connecting shaft 24;

[0061] Among them, the two worm gears 23 drive the two turbines 22 connected thereto to rotate, the two turbines 22 drive the two bidirectional threaded rods 15 to rotate, the two bidirectional threaded rods 15 drive the two movable sleeves 21 connected thereto to move to relative positions, the four movable sleeves 21 drive the concave fixing plates 14 connected thereto to move to relative positions, and then drive the two arc-shaped fixing plates 27 correspondingly arranged on the left and right to move to relative positions to fix the chemical oil pipeline 12. The overall fixing process is simple and convenient, and the installation and disassembly efficiency of the chemical oil pipeline 12 is improved;

[0062] When the chemical oil pipeline 12 enters the inner wall of the second anti-corrosion shell 4, the four arc-shaped grooves 7 will contact the outer surface of the chemical oil pipeline 12, supporting the chemical oil pipeline 12, and facilitating the fixation of the chemical oil pipeline 12, thereby improving the stability of the chemical oil pipeline 12 after fixation;

[0063] Among them, the four arc-shaped fixing plates 27 will slide through the outer wall of the fixing rod 8, and the four fixing rods 8 play an auxiliary role in the movement of the arc-shaped fixing plates 27, thereby improving the stability of the four arc-shaped fixing plates 27 when moving and fixing;

[0064] After the chemical oil pipeline 12 is fixed, the second anti-corrosion housing 4 is placed as a whole inside the installation groove and fixed by the fixing member, and then the two T-shaped sliders 6 are slidably connected to the inner walls of the two T-shaped slide grooves 17, and the two fixing rods 18 are inserted into the inner walls of the two fixing holes 16, thereby completing the fixing of the first anti-corrosion housing 1;

[0065] Among them, then pick up another second anti-corrosion shell 4 installed with a chemical oil pipeline 12 as a whole, and place another second anti-corrosion shell 4 as a whole on the inner wall of the installation groove, so that the two corresponding chemical oil pipelines 12 are in contact with each other, and then fix the two corresponding chemical oil pipelines 12 through external connectors, and then the staff pulls the anti-corrosion sleeve 3 through the first fixing sleeve 2, so that the front end of the first fixing sleeve 2 enters the interior of the installation groove 11, and the first fixing sleeve 2 is communicated with the opposite surface of the second fixing sleeve 13, so that the first fixing magnet and the second fixing magnet fit together for fixing;

[0066] The installation of the entire chemical oil pipeline 12 can be completed by repeating the above steps;

[0067] Among them, by setting the anti-corrosion component, not only can the direct contact between the chemical oil pipeline 12 and the soil be avoided, the soil is prevented from directly contacting the pipeline surface for a long time, the speed of the anti-corrosion coating falling off is reduced, and the corrosion resistance of the chemical oil pipeline 12 is improved, but also the direct contact between the connection of the two chemical oil pipelines 12 and the soil is avoided, and the corrosion resistance of the connection of the two chemical oil pipelines 12 is improved;

[0068] The first anti-corrosion shell 1 and the second anti-corrosion shell 4 are provided to not only provide double anti-corrosion to the chemical petroleum pipeline 12 , but also improve the pressure resistance of the chemical petroleum pipeline 12 .

[0069] Structure Description:

[0070] Arc groove 7: The arc groove 7 is arranged on the fixing rod 8, and the arc groove 7 plays an auxiliary and supporting role in the installation of the chemical oil pipeline 12.

[0071] Fixed rod 8 : The fixed rod 8 is disposed on the arc-shaped fixed plate 27 , and the fixed rod 8 assists the movement of the arc-shaped fixed plate 27 .

[0072] Fixed rod 18: The fixed rod 18 is arranged in the T-shaped slide groove 17. The fixed rod 18 plays a stabilizing role in the installation of the T-shaped slide block 6 and can improve the structural strength of the T-shaped slide block 6.

[0073] The first fixing sleeve 2 is arranged on the anti-corrosion sleeve 3 , and the first fixing sleeve 2 blocks the movement of the anti-corrosion sleeve 3 , thereby preventing the first fixing sleeve 2 from entering into the interior of the second anti-corrosion shell 4 .

[0074] Installation groove 11: The installation groove 11 is arranged on the second anti-corrosion shell 4, and the installation groove 11 plays a guiding role in the installation of the anti-corrosion sleeve 3.

[0075] Rectangular groove 20 : The rectangular groove 20 is arranged on the second anti-corrosion shell 4 , and the rectangular groove 20 plays a role of limiting and assisting the movement of the movable plate 19 .

[0076] The first anti-corrosion shell 1 : The first anti-corrosion shell 1 is arranged on two T-shaped sliding blocks 6 , and the first anti-corrosion shell 1 supports the upper surface of the second anti-corrosion shell 4 .

[0077] T-shaped slider 6: The T-shaped slider 6 is arranged on the T-shaped slide groove 17. The T-shaped slider 6 cooperates with the T-shaped slide groove 17 to facilitate the installation of the first anti-corrosion housing 1.

[0078] Connecting sleeve 25: The connecting sleeve 25 assists and supports the rotation of the connecting shaft 24.

[0079] 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. An anti-corrosion structure for a chemical petroleum pipeline, characterized in that: include: A second anti-corrosion shell (4) and a chemical oil pipeline (12), wherein the upper surface of the second anti-corrosion shell (4) is provided with two rectangular grooves (20) communicating with the second anti-corrosion shell (4), and the front and rear surfaces of the second anti-corrosion shell (4) are both provided with circular through grooves; A fixing assembly, the fixing assembly being arranged on the second anti-corrosion housing (4); An anti-corrosion component, the anti-corrosion component is arranged on the second anti-corrosion housing (4), the anti-corrosion component comprises two first protection boxes (5), the two first protection boxes (5) are respectively fixedly connected to the left and right sides of the second anti-corrosion housing (4); Wherein, the two first protection boxes (5) are provided with T-shaped sliding grooves (17) on the opposite sides thereof, the inner walls of the two T-shaped sliding grooves (17) are slidably connected with T-shaped sliding blocks (6), the two T-shaped sliding blocks (6) are provided with fixing holes (16), and the inner walls of the two fixing holes (16) are slidably connected with fixing rods (18); The two fixing rods (18) are fixedly connected to the inner wall of the corresponding T-shaped sliding groove (17), and the facing surfaces of the two T-shaped sliding blocks (6) are fixedly connected to the first anti-corrosion shell (1).

2. The anti-corrosion structure of a chemical petroleum pipeline according to claim 1, characterized in that: The front surface of the first anti-corrosion shell (1) is provided with an anti-corrosion sleeve (3), the rear surface of the anti-corrosion sleeve (3) slides into the interior of the first anti-corrosion shell (1), the outer surface of the anti-corrosion sleeve (3) is fixedly sleeved with a first fixed sleeve (2), and the front surface of the first fixed sleeve (2) is provided with a first fixed magnet; The rear surface of the first anti-corrosion shell (1) is provided with a mounting groove (11), the rear surface of the first protective box (5) is fixedly connected with a second fixing sleeve (13), and the rear surface of the second fixing sleeve (13) is provided with a second fixing magnet.

3. The anti-corrosion structure of a chemical petroleum pipeline according to claim 1, characterized in that: The fixing assembly comprises two second protection boxes (9), and the two second protection boxes (9) are both fixedly connected to the upper surface of the first anti-corrosion shell (1); The inner walls of the two second protection boxes (9) are both rotatably connected with bidirectional threaded rods (15), and the outer walls of the two bidirectional threaded rods (15) are both threadably sleeved with movable sleeves (21).

4. The anti-corrosion structure of a chemical petroleum pipeline according to claim 3 is characterized in that: The lower surfaces of the two movable sleeves (21) are fixedly connected to movable plates (19), the lower ends of the four movable plates (19) respectively slide through the inner walls of the corresponding rectangular grooves (20), and the lower ends of the four movable plates (19) are fixedly connected to concave fixed plates (14).

5. The anti-corrosion structure of a chemical petroleum pipeline according to claim 1, characterized in that: Four arc-shaped fixing plates (27) are arranged inside the second anti-corrosion housing (4), and the outer surfaces of the four arc-shaped fixing plates (27) are respectively fixedly connected to the corresponding concave fixing plates (14), and two fixing rods (8) are arranged on the opposite surfaces of the two corresponding arc-shaped fixing plates (27) on the left and right.

6. The anti-corrosion structure of a chemical petroleum pipeline according to claim 5, characterized in that: The upper surfaces of the four fixing rods (8) are each provided with an arc groove (7), and the opposite ends of the four fixing rods (8) respectively slide through the outer surface of the corresponding arc fixing plate (27), and the opposite ends of the four fixing rods (8) are fixedly connected to the inner wall of the second anti-corrosion shell (4).

7. The anti-corrosion structure of a chemical petroleum pipeline according to claim 1, characterized in that: A third protection box (10) is fixedly connected to the left side of the first anti-corrosion housing (1), and the two second protection boxes (9) are both in communication with the third protection box (10); The right ends of the two bidirectional threaded rods (15) both penetrate into the interior of the third protection box (10) and are both rotatably connected to the inner wall of the third protection box (10).

8. The anti-corrosion structure of a chemical petroleum pipeline according to claim 3, characterized in that: The outer walls of the two bidirectional threaded rods (15) are fixedly sleeved with a turbine (22), the inner wall of the third protection box (10) is fixedly connected with an L-shaped fixing plate (26), and the upper surface of the L-shaped fixing plate (26) is fixedly connected with a connecting sleeve (25).

9. The anti-corrosion structure of a chemical petroleum pipeline according to claim 8, characterized in that: The inner wall of the connecting sleeve (25) is rotatably connected to a connecting shaft (24), and the front and rear surfaces of the connecting shaft (24) are fixedly connected to worm gears (23), and the two worm gears (23) are respectively meshed with the corresponding turbines (22).

10. The anti-corrosion structure of a chemical petroleum pipeline according to claim 9, characterized in that: The front end of the worm (23) located at the front side is rotatably connected to the inner wall of the third protection box (10); The rear end of the worm gear (23) at the rear side rotates and penetrates the front surface of the third protective box (10); Wherein, a connecting piece is fixedly connected to the rear end of the rear worm gear (23).

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