Corrosion protection device for tidal range area part of PCCP (prestressed concrete cylinder pipe) in marine environment

Abstract

The invention discloses a corrosion protection device for a tidal range area part of a PCCP (prestressed concrete cylinder pipe) in a marine environment, relates to the technical field of marine pipelines, and solves the problem that corrosion of the PCCP part is aggravated due to the fact that marine organisms which are difficult to clean like barnacles are more easily attached to the PCCP part. The outer side of the PCCP body is fixedly connected with a first hoop and a second hoop in a sleeving mode, the second hoop is located on the right side of the first hoop, the cleaning mechanism is used for cleaning marine organisms attached to the surface of the PCCP body, and the cleaning mechanism is installed on the outer side of the PCCP body; the cleaning mechanism is installed, the arc pipe in the cleaning mechanism can move on the outer side of the PCCP body in a reciprocating mode, the arc pipe can spray high-pressure water columns to the outer wall of the PCCP body through the multiple inclined spray heads, marine organisms attached to the PCCP body can be washed off, and therefore corrosion of the marine organisms to the PCCP body can be relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of marine pipelines, and in particular to a corrosion protection device for the tidal zone of PCCP pipes in a marine environment. Background Art

[0002] PCCP pipe refers to a water conveyance pipe made by winding circumferential prestressed steel wires on a high-strength concrete pipe core with a steel cylinder, and then spraying a dense cement mortar protective layer thereon. It is a composite pipe made of thin steel plates, high-strength steel wires and concrete, which fully and comprehensively exerts the tensile strength and easy sealing of steel and the compressive strength and corrosion resistance of concrete, and has the characteristics of high tightness, high strength and high impermeability.

[0003] In the actual use process of PCCP pipes in a marine environment, the tidal zone part is immersed in seawater during high tide, and at the same time, some marine organisms will attach to the pipe surface. When the tide ebbs, the PCCP pipes in the tidal zone part will be exposed, resulting in the drying of the marine organisms attached to their surfaces. These dried marine organisms will still adhere to the PCCP pipes and cause the surface of the PCCP pipes to become rough, making it easier for the PCCP pipes in this part to attach marine organisms such as barnacles that are difficult to clean after high tide, thus exacerbating the corrosion of the PCCP pipes in this part. Summary of the Invention

[0004] The purpose of the present invention is to provide a corrosion protection device for the tidal zone of PCCP pipes in a marine environment to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A corrosion protection device for the tidal zone of PCCP pipes in a marine environment includes a PCCP pipe body located in the marine tidal zone. A first hoop and a second hoop are respectively fixedly sleeved on the outer side of the PCCP pipe body, and the second hoop is located on the right side of the first hoop. The device further includes a cleaning mechanism for cleaning the marine organisms attached to the surface of the PCCP pipe body, and the cleaning mechanism is installed on the outer side of the PCCP pipe body; a sand pushing component for pushing away the sand and stones accumulated on both sides of the PCCP pipe body, the sand pushing component is installed in the cleaning mechanism, and the number of the sand pushing components is two groups and they are symmetrically distributed.

[0007] Preferably, the cleaning mechanism includes two sets of first winding rollers and second winding rollers that are symmetrically distributed front and back, and the number of each set of the first winding rollers and the second winding rollers is one. Two symmetrically distributed gear discs are fixedly sleeved on the outer sides of the first winding roller and the second winding roller, and the gear discs on the first winding roller are meshed with the gear discs on the second winding roller. One end of the second winding roller away from the PCCP pipe body is fixedly connected to a motor. A first pulling rope is wound around the outer side of the first winding roller, and a second pulling rope is wound around the outer side of the second winding roller, and the right ends of the first pulling rope and the second pulling rope are fixedly connected.

[0008] Preferably, an arc-shaped pipe is movably sleeved on the outer side of the PCCP pipe body. A plurality of inclined spray heads are installed on the outer side of the arc-shaped pipe at equal intervals. Two symmetrically distributed support seats are fixedly sleeved on the outer side of the arc-shaped pipe. A guiding rope is installed on the upper side of the arc-shaped pipe. A guiding block is movably sleeved on the outer side of the guiding rope, and the guiding block is fixedly sleeved on the outer side of the arc-shaped pipe. A conduit communicated with the arc-shaped pipe is fixedly installed on the outer side of the arc-shaped pipe.

[0009] Preferably, one end of the conduit away from the arc-shaped pipe is fixedly connected to a pipe collector, and the pipe collector is fixedly installed on the outer side of the first hoop. The pipe collector is connected to a water pump through a water pipe. Two symmetrically distributed first guide rollers are installed on the outer side of the second hoop, and the first guide rollers are rotatably connected to the second hoop through mounting seats. The connection between the first guide rollers and the first pulling rope and the second pulling rope is in a rolling contact manner. A support cover is fixedly sleeved on the outer side of the PCCP pipe body near the right end of the first hoop. Second guide rollers are rotatably installed on the left side of the support cover corresponding to the outer sides of the first pulling rope and the second pulling rope. The two ends of the guiding rope are respectively fixedly connected to the second hoop and the support cover.

[0010] Preferably, a scraping plate is movably attached to the left side of the first guide roller, and the scraping plate is fixedly connected to the second hoop. Annular steel brushes are fixedly embedded on the guiding block and the scraping plate, and the annular steel brushes are correspondingly movably sleeved on the outer sides of the first pulling rope and the guiding rope. The connection between the annular steel brushes and the first pulling rope, the second pulling rope and the guiding rope is in a sliding contact manner.

[0011] Preferably, the sand pushing assembly includes a connecting seat fixedly sleeved outside the first pulling rope. The second pulling rope penetrates through the connecting seat and can move inside the connecting seat. A sand pushing plate is installed on the lower side of the connecting seat, and the sand pushing plate is rotatably connected to the connecting seat through a connecting shaft. A torsion spring is fixedly sleeved outside the connecting shaft, and the outer end of the torsion spring is fixedly connected to the connecting seat. Two first limiting rods distributed at equal circumferential intervals are movably abutted against the outside of the sand pushing plate, and the first limiting rods are fixedly connected to the connecting seat.

[0012] Preferably, a positioning assembly is installed on the outside of the sand pushing plate. The positioning assembly includes two second limiting rods installed on the outside of the sand pushing plate and distributed at equal circumferential intervals. The sand pushing plate is movably abutted against the second limiting rods.

[0013] Preferably, two pin rods distributed at equal circumferential intervals are movably embedded at the lower end of the connecting seat. The upper end of the pin rod is movably sleeved with a sleeve, and the sleeve is movably embedded inside the connecting seat. A gasket is fixedly connected to one end of the pin rod located inside the sleeve. A first spring is movably abutted against the side of the gasket away from the pin rod.

[0014] Preferably, a driving assembly is installed at the upper end of the sleeve. The driving assembly includes a connecting rod fixedly installed at the upper end of the sleeve. A convex plate is fixedly installed near the lower end of the outside of the connecting rod. A second spring is fixedly installed at the upper end of the convex plate, and one end of the second spring away from the convex plate is movably abutted against the connecting seat.

[0015] Preferably, a hemisphere is fixedly installed at the upper end of the connecting rod through a connecting plate. A driving block is movably abutted against the lower side of the hemisphere, and the cross-sectional shape of the driving block is an isosceles trapezoid. A positioning plate is fixedly installed on one side of the driving block, and the positioning plate is fixedly connected to the support cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By installing a cleaning mechanism, the arc tube in the cleaning mechanism can reciprocate outside the PCCP pipe body. The arc tube can spray high-pressure water columns onto the outer wall of the PCCP pipe body through multiple inclined nozzles, which can wash off the marine organisms attached to the PCCP pipe body, thereby reducing the corrosion of the PCCP pipe body located in the tidal range area by marine organisms.

[0018] 2. By installing a sand pushing assembly, the sand pushing plate in the sand pushing assembly can push away the sand and stones accumulated on both sides of the PCCP pipe body during the rightward movement of the arc tube, thereby avoiding the sand and stones being stuck between the arc tube and the PCCP pipe body and causing the movement of the arc tube to be blocked.

[0019] 3. In the present invention, by installing a positioning component and a driving component, during the process of the arc-shaped pipe moving back to the left, the positioning component can keep the sand pushing plate parallel to the PCCP pipe, preventing the sand pushing plate from gathering sand and stones towards the PCCP pipe body, thereby reducing the resistance of the arc-shaped pipe during its backward movement. During the reset process of the sand pushing plate, the driving component can rotate and reset the sand pushing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the bottom structure of the PCCP pipe body of the present invention;

[0022] Figure 3 is a schematic diagram of the connection state between the cleaning mechanism and the sand pushing component of the present invention;

[0023] Figure 4 is a schematic diagram of the overall structure of the cleaning mechanism of the present invention;

[0024] Figure 5 is a schematic diagram of the overall structure of the sand pushing component, positioning component and driving component of the present invention;

[0025] Figure 6 is a schematic diagram of the side sectional structure of the connecting seat of the present invention;

[0026] Figure 7 is a schematic diagram of the connection state between the positioning component and the driving component of the present invention;

[0027] Figure 8 is a schematic diagram of the positional distribution plane of the first limiting rod, second limiting rod, pin rod, sand pushing plate and PCCP pipe body of the present invention.

[0028] In the figure: 1. PCCP pipe body; 2. First hoop; 3. Second hoop; 4. First roller; 5. Second roller; 6. Gear disc; 7. Motor; 8. First pull rope; 9. Second pull rope; 10. Arc-shaped pipe; 11. Inclined nozzle; 12. Support seat; 13. Guide rope; 14. Guide block; 15. Conduit; 16. Pipe reel; 17. First guide roller; 18. Mounting seat; 19. Second guide roller; 20. Support cover; 21. Scraper; 22. Annular wire brush; 23. Connecting seat; 24. Sand pushing plate; 25. Connecting shaft; 26. Torsion spring; 27. First limiting rod; 28. Second limiting rod; 29. Pin rod; 30. Sleeve; 31. Gasket; 32. First spring; 33. Link; 34. Convex plate; 35. Second spring; 36. Connecting plate; 37. Hemisphere; 38. Driving block; 39. Positioning plate. DETAILED DESCRIPTION OF THE INVENTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1: Please refer to Figures 1-4 , a corrosion protection device for the tidal range area of a PCCP pipe in a marine environment shown in the figure, including a PCCP pipe body 1 located in the marine tidal range area. In order to further improve the anti-corrosion effect of the PCCP pipe body 1 in the tidal range area, an anti-corrosion coating is sprayed on the outer side of the PCCP pipe body 1. The outer side of the PCCP pipe body 1 is fixedly sleeved with a first hoop 2 and a second hoop 3 respectively, and the second hoop 3 is located on the right side of the first hoop 2. It also includes a cleaning mechanism for cleaning the marine organisms attached to the surface of the PCCP pipe body 1, and the cleaning mechanism is installed on the outer side of the PCCP pipe body 1.

[0031] The cleaning mechanism includes two groups of first rollers 4 and second rollers 5 that are symmetrically distributed front and back, and the number of each group of first rollers 4 and second rollers 5 is one. Two symmetrically distributed gear disks 6 are fixedly sleeved on the outer sides of the first roller 4 and the second roller 5 respectively, and the gear disks 6 on the first roller 4 are meshed with the gear disks 6 on the second roller 5. The gear disks 6 are beneficial for the first roller 4 and the second roller 5 to rotate in different directions. One end of the second roller 5 far from the PCCP pipe body 1 is fixedly connected with a motor 7. The first motor 7 is used to drive the first roller 4 to rotate. A first pull rope 8 is wound around the outer side of the first roller 4, and a second pull rope 9 is wound around the outer side of the second roller 5, and the right ends of the first pull rope 8 and the second pull rope 9 are fixedly connected.

[0032] An arc-shaped pipe 10 is movably sleeved on the outer side of the PCCP pipe body 1. When the first roller 4 and the second roller 5 rotate in different directions at the same time, the arc-shaped pipe 10 can be driven to reciprocate on the outer side of the PCCP pipe body 1 through the first pull rope 8 and the second pull rope 9. A plurality of equally spaced inclined nozzles 11 are installed on the outer side of the arc-shaped pipe 10. The high-pressure water columns sprayed by the inclined nozzles 11 can wash the outer wall of the PCCP pipe body 1. Two symmetrically distributed support seats 12 are fixedly sleeved on the outer side of the arc-shaped pipe 10. A guide rope 13 is installed on the upper side of the arc-shaped pipe 10. A guide block 14 is movably sleeved on the outer side of the guide rope 13, and the guide block 14 is fixedly sleeved on the outer side of the arc-shaped pipe 10. The guide rope 13 and the guide block 14 can enhance the stability of the arc-shaped pipe 10 during the moving process. A conduit 15 that is interconnected with the arc-shaped pipe 10 is fixedly installed on the outer side of the arc-shaped pipe 10.

[0033] One end of the conduit 15 away from the arc-shaped pipe 10 is fixedly connected to the pipe winder 16, and the pipe winder 16 is fixedly installed on the outside of the first hoop 2. The pipe winder 16 is used for automatically winding and unwinding the pipeline. The pipe winder 16 is connected to the water pump through a water pipe. Two first guide rollers 17 are symmetrically distributed front and back on the outside of the second hoop 3, and the first guide rollers 17 are rotatably connected to the second hoop 3 through the mounting seats 18. The first guide rollers 17 are used for conducting the first pulling rope 8 and the second pulling rope 9. The connection methods between the first guide rollers 17 and the first pulling rope 8 and the second pulling rope 9 are both rolling contacts. A support cover 20 is fixedly sleeved on the outside of the PCCP pipe body 1 near the right end of the first hoop 2. The support cover 20 can protect the inclined nozzle 11. Second guide rollers 19 are rotatably installed on the left side of the support cover 20 corresponding to the outside of the first pulling rope 8 and the second pulling rope 9. The two ends of the guide rope 13 are fixedly connected to the second hoop 3 and the support cover 20 respectively. The second guide rollers 19 can prevent the first pulling rope 8 and the second pulling rope 9 from directly rubbing against the support cover 20.

[0034] A scraper 21 is movably attached to the left side of the first guide roller 17, and the connection method between the scraper 21 and the second hoop 3 is a fixed connection. The scraper 21 can scrape off the possible attached shellfish on the first guide roller 17 when the first guide roller 17 rotates. Annular wire brushes 22 are fixedly embedded on both the guide block 14 and the scraper 21, and the annular wire brushes 22 are correspondingly movably sleeved on the outside of the first pulling rope 8 and the guide rope 13. The connection methods between the annular wire brushes 22 and the first pulling rope 8, the second pulling rope 9 and the guide rope 13 are all sliding contacts. The annular wire brushes 22 are used for brushing off the attachments on the first pulling rope 8, the second pulling rope 9 and the guide rope 13.

[0035] Embodiment Two: Please refer to Figure 3 , Figure 5 , in this embodiment, a further description is made for Embodiment One. A sand pushing assembly is used to push away the sand and stones accumulated on both sides of the PCCP pipe body 1. The sand pushing assembly is installed in the cleaning mechanism. The number of the sand pushing assemblies is two groups and they are symmetrically distributed. The sand pushing assembly includes a connecting seat 23 fixedly sleeved on the outside of the first pulling rope 8. The second pulling rope 9 passes through the connecting seat 23 and can move inside the connecting seat 23. A sand pushing plate 24 is installed on the lower side of the connecting seat 23, and the sand pushing plate 24 is rotatably connected to the connecting seat 23 through a connecting shaft 25. The connecting seat 23 can drive the sand pushing plate 24 to move together with the arc-shaped pipe 10 through the first pulling rope 8 and the second pulling rope 9. A coil spring 26 is fixedly sleeved on the outside of the connecting shaft 25, and the outer end of the coil spring 26 is fixedly connected to the connecting seat 23. Two first limiting rods 27 are circumferentially and equidistantly distributed on the outside of the sand pushing plate 24 and are movably abutted against it. The connection method between the first limiting rods 27 and the connecting seat 23 is a fixed connection. The first limiting rods 27 are used to limit the rotation of the sand pushing plate 24 towards the PCCP pipe body 1.

[0036] Embodiment Three: Please refer to Figures 6-8, this embodiment further illustrates Embodiment 2. A positioning component is installed on the outer side of the sand pushing plate 24. The positioning component includes two second limiting rods 28 that are installed on the outer side of the sand pushing plate 24 and are evenly distributed at equal intervals in a circumferential manner. The connection method between the sand pushing plate 24 and the second limiting rods 28 is movable abutment.

[0037] Two pin rods 29 that are evenly distributed at equal intervals in a circumferential manner are movably embedded at the lower end of the connecting seat 23. The second limiting rods 28 and the pin rods 29 position the sand pushing plate 24, enabling the sand pushing plate 24 to be perpendicular to the connecting seat 23. A sleeve 30 is movably sleeved on the upper end of the pin rod 29, and the sleeve 30 is movably embedded inside the connecting seat 23. A gasket 31 is fixedly connected to one end of the pin rod 29 located inside the sleeve 30. The gasket 31 is used to prevent the pin rod 29 from detaching from the sleeve 30. A first spring 32 is movably abutted against one side of the gasket 31 away from the pin rod 29. The first spring 32 can drive the pin rod 29 to move downward through the sleeve 30.

[0038] Embodiment 4: Please refer to Figure 5 , Figure 7 , this embodiment illustrates Embodiment 3. A driving component is installed on the upper end of the sleeve 30. The driving component includes a connecting rod 33 fixedly installed on the upper end of the sleeve 30. A convex plate 34 is fixedly installed near the lower end of the outer side of the connecting rod 33. A second spring 35 is fixedly installed on the upper end of the convex plate 34. One end of the second spring 35 away from the convex plate 34 is movably abutted against the connecting seat 23. The second spring 35 can drive the connecting rod 33 and the sleeve 30 to move downward through the connecting seat 23 and the convex plate 34.

[0039] The upper end of the connecting rod 33 is fixedly installed with a hemispherical body 37 through a connecting plate 36. A driving block 38 is movably abutted against the lower side of the hemispherical body 37. The hemispherical body 37 is used to reduce the frictional resistance between the connecting plate 36 and the driving block 38. The cross-sectional shape of the driving block 38 is an isosceles trapezoid. A positioning plate 39 is fixedly installed on one side of the driving block 38. The connection method between the positioning plate 39 and the support cover 20 is fixed connection. The driving block 38 can drive the hemispherical body 37 and the sleeve 30 to move upward through its hypotenuse.

[0040] Working principle: When it is necessary to clean the marine organisms attached to the surface of the PCCP pipe body 1 at the set time, the water pump connected to the pipe reel 16 operates, so that the high-pressure water column is ejected outside the PCCP pipe body 1 through a plurality of inclined nozzles 11. The motor 7 drives the second roller 5 to rotate to wind up the second pulling rope 9. At the same time, under the action of the gear disc 6, the first roller 4 rotates in the opposite direction to the second roller 5 to pay out the first pulling rope 8. During the process of the second roller 5 winding up the second pulling rope 9, the first pulling rope 8 drives the arc-shaped pipe 10 and a plurality of inclined nozzles 11 to move outside the PCCP pipe body 1 through the support seat 12 (since the PCCP pipe body 1 is heavy, it is usually installed close to the ground without installing a bracket, and the shape of the arc-shaped pipe 10 can avoid the part where the PCCP pipe body 1 is in contact with the ground). The high-pressure water column ejected by the plurality of inclined nozzles 11 flushes the outer wall of the PCCP pipe body 1, and can wash off the marine organisms attached to the outer wall of the PCCP pipe body 1, thereby effectively reducing the corrosion of the PCCP pipe body 1 located in the tidal range area by marine organisms and effectively extending the service life of the PCCP pipe body 1. When the arc-shaped pipe 10 moves close to the first guide roller 17, the motor 7 drives the second roller 5 to rotate in the reverse direction, so that the first roller 4 winds up the first pulling rope 8 to move the arc-shaped pipe 10 back to its original position (during the process of the first roller 4 and the second roller 5 winding up the first pulling rope 8 and the second pulling rope 9 respectively, in order to make the pulling ropes neatly distributed on the surface of the rollers, a rope arranging device can be installed outside the first roller 4 and the second roller 5. Since the rope arranging device belongs to the prior art, it will not be elaborated here).

[0041] During the process of the arc-shaped pipe 10 moving to the right, since the end with a smaller distance between the two sand pushing plates 24 is on the right side and is blocked by the first limiting rod 27 (as can be seen from the attached drawings of the specification), so during the process of the sand pushing plate 24 moving to the right with the arc-shaped pipe 10, it can always maintain translation at this angle, so that when the sand pushing plate 24 moves, it can push away the sand and stones accumulated on both sides of the PCCP pipe body 1, thereby preventing the sand and stones from getting stuck between the arc-shaped pipe 10 and the PCCP pipe body 1 and causing the movement of the arc-shaped pipe 10 to be blocked. Figure 3 As can be seen from the attached drawings of the specification

[0042] When the sand pushing plate 24 moves leftward and returns to its original position along with the arc-shaped pipe 10, the sand pushing plate 24 will push the sand and gravel towards the PCCP pipe body 1. At the same time, the sand pushing plate 24 will rotate under the obstruction of the sand and gravel. During the rotation of the sand pushing plate 24, the sand pushing plate 24 will drive the pin rod 29 to move upward through the inclined surface of the pin rod 29. When the sand pushing plate 24 rotates to a state parallel to the PCCP pipe body 1, the pin rod 29 will move downward under the driving force of the compression elastic force of the first spring 32 and cooperate with the two second limiting rods 28 to block the sand pushing plate 24, so as to position the sand pushing plate 24, so that the sand pushing plate 24 always maintains a state parallel to the PCCP pipe body 1 during the leftward return movement, thereby effectively reducing the resistance of the arc-shaped pipe 10 to return.

[0043] After the arc-shaped pipe 10 returns to the support cover 20, the hemispherical body 37 will be in sliding contact with the driving block 38 through the inclined surface of the driving block 38. The driving block 38 will drive the connecting rod 33 and the pin rod 29 to move upward through the hemispherical body 37, so that the pin rod 29 disengages from the sand pushing plate 24. At this time, the sand pushing plate 24 will rotate and return to its original position under the driving of the spiral spring 26, so as to facilitate the next sand pushing (a foundation pit can be excavated at the lower side of the PCCP pipe body 1 corresponding to the installation position of the first hoop 2 and the support cover 20 to facilitate the rotation and return of the sand pushing plate 24). When the hemispherical body 37 disengages from the driving block 38, the connecting rod 33 and the pin rod 29 will move downward and return to their original positions under the driving of the second spring 35.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion protection device for the tidal range area of a PCCP pipe in a marine environment, comprising a PCCP pipe body (1) located in the marine tidal range area. A first hoop (2) and a second hoop (3) are respectively sleeved on the outer side of the PCCP pipe body (1), and it is characterized in that, Further included are: a cleaning mechanism for cleaning marine organisms attached to the surface of the PCCP pipe body (1), and the cleaning mechanism is installed on the outer side of the PCCP pipe body (1); a sand pushing assembly for pushing away the sand and gravel accumulated on both sides of the PCCP pipe body (1), the sand pushing assembly is installed in the cleaning mechanism, and the number of the sand pushing assemblies is two groups.

2. The corrosion protection device for the tidal difference area of the PCCP pipe in the marine environment according to claim 1, wherein: The cleaning mechanism includes two first winding rollers (4) and second winding rollers (5). Two gear discs (6) are sleeved on the outer sides of the first winding roller (4) and the second winding roller (5). One end of the second winding roller (5) is connected with a motor (7). A first pulling rope (8) is wound around the outer side of the first winding roller (4), a second pulling rope (9) is wound around the outer side of the second winding roller (5), and the right ends of the first pulling rope (8) and the second pulling rope (9) are fixedly connected.

3. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 2, characterized in that: An arc pipe (10) is sleeved on the outer side of the PCCP pipe body (1). A plurality of inclined nozzles (11) are installed on the outer side of the arc pipe (10). Two support seats (12) are sleeved on the outer side of the arc pipe (10). A guiding rope (13) is installed on the upper side of the arc pipe (10). A guiding block (14) is sleeved on the outer side of the guiding rope (13). A conduit (15) is installed on the outer side of the arc pipe (10).

4. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 3, characterized in that: One end of the conduit (15) is fixedly connected with a pipe receiver (16). The pipe receiver (16) is connected with a water pump through a water pipe. Two first guide rollers (17) are installed on the outer side of the second hoop (3). A support cover (20) is sleeved on the outer side of the PCCP pipe body (1). A second guide roller (19) is installed on the left side of the support cover (20).

5. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 4, characterized in that: A scraper (21) is attached to the left side of the first guide roller (17). Ring-shaped wire brushes (22) are embedded on both the guiding block (14) and the scraper (21). The connection modes of the ring-shaped wire brushes (22) with the first pulling rope (8), the second pulling rope (9) and the guiding rope (13) are all sliding contacts.

6. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 4, characterized in that: The sand pushing assembly includes a connection seat (23) sleeved on the outer side of the first pulling rope (8). The second pulling rope (9) penetrates through the connection seat (23). A sand pushing plate (24) is installed on the lower side of the connection seat (23). The sand pushing plate (24) is rotationally connected with the connection seat (23) through a connection shaft (25). A coil spring (26) is sleeved on the outer side of the connection shaft (25). Two first limiting rods (27) are abutted against the outer side of the sand pushing plate (24).

7. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 6, wherein: A positioning assembly is installed on the outer side of the sand pushing plate (24). The positioning assembly includes two second limiting rods (28). Two pin rods (29) are embedded at the lower end of the connection seat (23).

8. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 7, characterized in that: A sleeve (30) is sleeved on the upper end of the pin rod (29). One end of the pin rod (29) is connected with a gasket (31). A first spring (32) is abutted against one side of the gasket (31).

9. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 8, characterized in that: A driving assembly is installed at the upper end of the sleeve (30). The driving assembly includes a connecting rod (33). A convex plate (34) is installed on the outer side of the connecting rod (33). A second spring (35) is installed at the upper end of the convex plate (34).

10. The corrosion protection device for the tidal range area of the PCCP pipe in the marine environment according to claim 9, characterized in that: The upper end of the connecting rod (33) is installed with a hemispherical body (37) through a connecting plate (36). A driving block (38) is abutted against the lower side of the hemispherical body (37). The cross-sectional shape of the driving block (38) is an isosceles trapezoid. A positioning plate (39) is installed on one side of the driving block (38).

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