A trenchless MPP cable protection pipe

Abstract

This invention relates to the field of cable duct technology, and more particularly to a trenchless MPP cable protection pipe, comprising a pipe body and an anti-slip component disposed on the pipe body to prevent the pipe body from slipping. The anti-slip component includes multiple soft scales fixedly disposed at equal angles on the pipe body. A C-shaped groove for folding the scales is opened on the lower side of the scales, and an elastic folding plate is fixedly disposed inside the groove. When the pipe body moves, the scales intermittently fold along the groove. When the pipe body is placed underground and pulled to move, the scales tilt in the opposite direction of the pipe body's movement, and at the same time, the scales contact the inner wall of the hole through which the pipe body is installed. The multiple scales form barbs, thereby effectively preventing the pipe body from slipping due to lack of force or terrain, ensuring the stability of the pipe body during installation, and preventing damage to the pipe body due to slipping, further improving the installation efficiency and stability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of cable duct technology, and in particular to a trenchless MPP cable protection pipe. Background Technology

[0002] Trenchless MPP cable protection pipes are widely used in underground pipeline projects such as power and communication. Their construction method usually uses horizontal directional drilling technology to drag the pipe into a pre-expanded duct.

[0003] However, existing pipes have the following problems in actual installation: the surface of the pipe is generally smooth, and there is a certain friction between the surface and the channel. However, after the pipe is dragged into the channel, it is prone to reverse slippage or displacement due to factors such as the slope of the stratum, the shutdown of the drilling rig or the retraction of the hole wall, which can lead to the joint coming apart or the pipe being damaged, seriously affecting the stability of the installation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a trenchless MPP cable protection pipe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A trenchless MPP cable protection pipe includes a pipe body and an anti-slip component disposed on the pipe body to prevent the pipe body from slipping. The anti-slip component includes a plurality of soft scales fixedly disposed at equal angles on the pipe body. A C-shaped groove for folding the scales is opened on the lower side of the scales, and an elastic folding plate is fixedly disposed inside the groove. When the pipe body moves, the scales fold intermittently along the groove.

[0006] Preferably, the surface of the tube body is provided with multiple storage grooves, and the scales are fixedly arranged in the storage grooves. When the scales are folded, they form a complete arc surface with the storage grooves. Multiple protrusions are provided on one side of the scales.

[0007] Preferably, a corrugated strip for fixing the scales is provided between the scales and the groove.

[0008] Preferably, the tube body is provided with a lubrication component for lubrication during tube movement, and lubricating fluid is sprayed out from the lubrication component when the scales fold intermittently.

[0009] Preferably, the lubrication assembly includes multiple sets of cavities equally spaced within the tube body. Each scale corresponds to one set of cavities, and each set of cavities includes a first cavity and a second cavity. A connecting hole is provided between the first cavity and the second cavity, and a sealing element is provided on the connecting hole. The end of the scale is located within the first cavity, and the first cavity has multiple liquid suction channels communicating with the first cavity. The tube body has a liquid spraying channel communicating with the liquid suction channels, and the liquid spraying channel extends to the outside of the scale. When the scale is vertical, the liquid in the second cavity enters the first cavity, and when the scale is folded, the liquid in the first cavity is indirectly discharged through the liquid suction channel and the liquid spraying channel.

[0010] Preferably, an anti-clogging component is provided on one side of the liquid suction channel to prevent the liquid spraying channel from becoming blocked.

[0011] Preferably, the anti-clogging component includes a corrugated sleeve fixedly installed at the outlet of the injection channel, and the corrugated sleeve has multiple outlet holes for lubricating fluid discharge, and a baffle is fixedly installed on the outer side of the corrugated sleeve.

[0012] Preferably, an elastic membrane is provided at the top of the first cavity, and the elastic membrane and the first cavity form a compression structure for injecting the lubricating fluid in the first cavity into the spray channel. A vent hole is provided between the elastic membrane and the scales, and the two ends of the vent hole are respectively connected to the first cavity and the tube. When the scales are folded, the vent hole is closed.

[0013] Preferably, the sealing element includes a placement groove formed between the first cavity and the second cavity, and an elastic sealing membrane for sealing the connecting hole is fixedly disposed in the placement groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The C-shaped groove's elastic baffles drive the scales to tilt in the direction of movement to reduce resistance when the pipe moves, and to form barbs vertically when the pipe is stationary. This achieves low resistance in the forward direction during pipe installation and self-locking in the reverse direction after installation, effectively preventing the underground pipe from slipping and shifting, and improving installation stability. At the same time, the intermittent folding and compression of the elastic membrane by the scales squeezes the lubricant in the first cavity to the scale surface through the spray channel, achieving automatic lubrication when the pipe moves and stopping the supply of liquid when stationary. This achieves the effect of supplying lubricant on demand and avoiding waste, significantly reducing the frictional resistance between the pipe and the inner wall of the channel, and improving the efficiency of long-distance installation. The linkage control of the vent and the elastic sealing membrane ensures that the first cavity supplies liquid each time the scales fold and the second cavity replenishes liquid to the first cavity each time it is upright. This achieves the effect of completing a lubrication and replenishment cycle with each movement of the scales, ensuring continuous lubrication during continuous installation and avoiding jamming caused by lubrication interruption. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front structure proposed in this invention; Figure 2 This is a schematic diagram of the right-side structure proposed in this invention; Figure 3 This is a schematic diagram of a partial left-side structure proposed in this invention; Figure 4 This is a schematic cross-sectional view of the partial front structure proposed in this invention. Figure 1 ; Figure 5 This is a schematic cross-sectional view of the partial front structure proposed in this invention. Figure 2 ; Figure 6 This is a schematic diagram of the partial frontal cross-sectional structure proposed in this invention. Figure 3 ; Figure 7 This is a schematic diagram of a partial left-side structure proposed in this invention; Figure 8 This is a schematic cross-sectional view of the partial front structure proposed in this invention. Figure 4 ; Figure 9 This is a schematic diagram of the working state proposed in this invention.

[0016] In the diagram: 1. Pipe body; 2. Anti-slip component; 21. Scales; 22. Groove; 23. Baffle plate; 24. Storage groove; 3. Lubrication component; 31. First cavity; 32. Second cavity; 33. Elastic membrane; 34. Protrusion; 35. Liquid suction channel; 36. Liquid spraying channel; 37. Connecting hole; 38. Placement groove; 39. Sealing membrane; 4. Anti-clogging component; 41. Corrugated sleeve; 42. Liquid outlet; 43. Baffle; 5. Vent hole; 6. Corrugated strip. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0019] Reference Figures 1-9A trenchless MPP cable protection pipe includes a pipe body 1 and an anti-slip component 2 disposed on the pipe body 1 to prevent it from slipping. The anti-slip component 2 includes multiple soft scales 21 fixedly disposed at equal angles on the pipe body 1. A C-shaped groove 22 for folding the scales 21 is provided on the lower side of the scales 21, and an elastic folding plate 23 is fixedly disposed inside the groove 22. When the pipe body 1 moves, the scales 21 fold intermittently along the groove 22. When the pipe body 1 is placed underground and pulled, the scales 21 tilt in the opposite direction of the movement of the pipe body 1, so that the scales 21 and the surface of the pipe body 1 form a smooth surface, thereby significantly reducing frictional resistance during installation. Figure 1 , Figure 2 and Figure 9 When the scales 21 tilt, they fold along the C-shaped groove 22. At the same time, the elastic folding plate 23 is compressed. Since the folding plate 23 has a certain elasticity, it is compressed and stores rebound energy. When the tube 1 stops moving, the elastic restoring force of the folding plate 23, combined with the elastic reset capability of the C-shaped groove 22 itself, causes the multiple scales 21 to gradually return to a vertical state. At this time, the scales 21 are in close contact with the inner wall of the hole of the tube 1. The multiple scales 21 are arranged circumferentially to form a barb structure, thereby effectively preventing the tube 1 from sliding backward due to no force or terrain slope. This fully ensures the positional stability of the tube 1 during installation and avoids the joint from falling off or the tube 1 from being damaged due to the backward sliding of the tube 1, further improving the installation efficiency and construction reliability of the equipment.

[0020] Preferred, Reference Figure 1 and Figure 9 The surface of the tube body 1 is provided with multiple storage grooves 24, and the scales 21 are fixedly installed in the storage grooves 24. When the scales 21 are folded, they form a complete arc surface with the storage grooves 24. Multiple protrusions 34 are provided on one side of the scales 21. When the tube body 1 moves, the scales 21 tilt and fold into the storage grooves 24, making the surface of the tube body 1 more flat and smooth, thereby reducing the frictional resistance between the tube body 1 and the channel, and facilitating the improvement of the overall efficiency of the tube body 1 during installation.

[0021] Preferred, Reference Figure 1 and Figure 7 A corrugated strip 6 is provided between the scale 21 and the groove 22 for fixing the scale 21. The scale 21 is initially tilted in the storage groove 24. At the same time, the corrugated strip 6 fixes the scale 21 in the storage groove 24, so that the scale 21 and the surface of the tube 1 form an integral arc surface, which facilitates the stacking and transportation of the tube 1 and prevents the scale 21 from being damaged due to collision during the transportation of the tube 1. When the tube 1 is ready to be used, the corrugated strip 6 is broken. At this time, the scale 21 automatically stands upright under the combined action of the C-shaped groove 22 and the elastic folding plate 23, and the activation is completed.

[0022] Preferred, Reference Figure 4 and Figure 5 The pipe body 1 is equipped with a lubrication component 3 for adaptive lubrication during pipe body 1 movement. When the scales 21 fold intermittently, lubricating fluid is sprayed out from the lubrication component 3. When the pipe body 1 is installed, since the underground channel is not ideally flat but has naturally uneven geological features, when the pipe body 1 moves, the uneven position inside the hole will intermittently squeeze the scales 21, causing it to fold intermittently. Each time the scales 21 fold downwards, the lubrication component 3 can be squeezed, allowing the lubricating fluid in the lubrication component 3 to flow out through the surface of the scales 21, thereby enhancing the lubrication effect when the pipe body 1 moves, ensuring the continuous lubrication state of the pipe body 1, and avoiding situations where the pipe body 1 cannot be quickly installed or even jammed due to excessive friction when moving.

[0023] Preferred, Reference Figure 4 and Figure 5 The lubrication assembly 3 includes multiple cavities equally spaced within the tube body 1, with each scale 21 corresponding to one cavity. Each cavity includes a first cavity 31 and a second cavity 32. A connecting hole 37 is provided between the first cavity 31 and the second cavity 32, and a sealing element is provided on the connecting hole 37. The end of the scale 21 is located within the first cavity 31, and multiple liquid suction channels 35 communicating with the first cavity 31 are provided on the first cavity 31. A liquid spraying channel 36 communicating with the liquid suction channels 35 is provided on the tube body 1, and the liquid spraying channel 36 extends to the outer surface of the scale 21. When the scale 21 is vertical, the lubricant in the second cavity 32 enters the first cavity 31 through the connecting hole 37. When the scale 21 is folded, the lubricant in the first cavity 31 is intermittently discharged through the liquid suction channels 35 and the liquid spraying channel 36. Initial state The lubricant is stored in the second cavity 32, and the connecting hole 37 between the first cavity 31 and the second cavity 32 is blocked. At the same time, the scales 21 are folded and stored in the storage groove 24. When the tube 1 is ready to be installed, the scales 21 gradually become upright. At this time, the lubricant in the second cavity 32 enters the first cavity 31 through the connecting hole 37 to complete the filling. Each time the scales 21 are squeezed and folded, the lubricant in the first cavity 31 is forced to be drawn in through the suction channel 35 and finally discharged through the spray channel 36, so that the lubricant is evenly applied to the surface of the scales 21, ensuring the lubrication stability of the tube 1 during installation and effectively reducing the frictional resistance of the tube 1. At the same time, the hollow design of the first cavity 31 and the second cavity 32 allows the middle layer of the tube 1 to be a lightweight structure, reducing the overall weight and manufacturing cost while ensuring the wear resistance of the tube 1.

[0024] Preferred, Reference Figure 8A blockage prevention component 4 is provided on one side of the suction channel 35 to prevent the spray channel 36 from being blocked. When the pipe body 1 moves, since the spray channel 36 is located on the outside of the pipe body 1 and is directly exposed to the mud and sand environment, the blockage prevention component 4 can effectively prevent sand and foreign objects from entering the spray channel 36 and prevent the spray channel 36 from being blocked, thereby avoiding affecting the normal discharge of lubricating fluid.

[0025] Preferred, Reference Figure 8 The anti-clogging component 4 includes a corrugated sleeve 41 fixedly installed at the outlet of the spray channel 36, and the corrugated sleeve 41 has multiple outlet holes 42 for lubricating fluid discharge; a baffle 43 is fixedly installed on the outer side of the corrugated sleeve 41; when the scales 21 move and the spray channel 36 is in the liquid suction state, the corrugated sleeve 41 is in the contracted state, at which time the outlet holes 42 are closed, and the baffle 43 physically prevents sand and gravel from entering the spray channel 36; when the spray channel 36 continuously sprays liquid outwards... The liquid pressure will squeeze the bellows 41, causing the bellows 41 to elongate axially. At this time, the liquid outlet 42 will open, and the lubricant will be sprayed out through the liquid outlet 42. When the liquid spraying channel 36 stops spraying, the bellows 41 will compress again due to its own elasticity, causing the liquid outlet 42 to close again. This forms an intelligent anti-blocking mechanism in which the liquid outlet 42 is open when spraying and automatically closes when not spraying, effectively ensuring the sealing of the liquid spraying channel 36, preventing foreign objects from entering, and ensuring the stable spraying effect of the lubricant.

[0026] Preferred, Reference Figure 5An elastic membrane 33 is provided at the top of the first cavity 31, forming a compression structure with the first cavity 31 to force the lubricating fluid in the first cavity 31 into the spray channel 36. A vent 5 is provided between the elastic membrane 33 and the scales 21, with both ends of the vent 5 connecting the first cavity 31 and the external environment of the tube 1. When the scales 21 are folded, the vent 5 is mechanically closed. In the initial state, all the lubricating fluid is located in the second cavity 32, and the first cavity 31 and the second cavity 32 are not connected. At the same time, the scales 21 are stored in the storage groove 24. The scales 21 compress the elastic membrane 33, making it in a shrunken and compressed state, while the vent 5 is folded and sealed. When the tube 1 is ready to be installed, the scales 21 need to complete the vertical movement first. As the scales 21 gradually become vertical, the elastic membrane 33 gradually expands elastically. At this time, the first cavity 31 and the second cavity 32 are connected. The seal between chambers 2 and 3 is opened by negative pressure, gradually connecting the first chamber 31 and the second chamber 32. Under the action of gravity and pressure difference, the lubricant in the second chamber 32 gradually flows into the first chamber 31. When the scale 21 is completely vertical, the liquid stops flowing, and the first chamber 31 is filled with lubricant. Each time the scale 21 is squeezed and folded by the external hole wall, the vent 5 is sealed and blocked. At the same time, the scale 21 squeezes the elastic membrane 33 downward. The positive pressure generated by the elastic membrane 33 will force the lubricant in the first chamber 31 into the suction channel 35, and then discharge it to the surface of the scale 21 through the spray channel 36. The scale 21 is intermittently squeezed by the uneven hole wall, which realizes the intermittent automatic spraying of lubricant. Each time the scale 21 returns to vertical, the vent 5 reconnects to the atmosphere. At this time, the elastic membrane 33 absorbs air through the vent 5 and expands elastically to recover, thus completing a complete suction and discharge cycle.

[0027] Preferred, Reference Figure 4 The sealing element includes a placement groove 38 formed between the first cavity 31 and the second cavity 32, and an elastic sealing membrane 39 for sealing the connecting hole 37 is fixedly installed in the placement groove 38. Each time the vent 5 is not opened and the elastic membrane 33 needs to elastically rebound, the negative pressure generated by the elastic membrane 33 will draw the elastic sealing membrane 39 out of the placement groove 38, and at the same time, the lubricating fluid in the second cavity 32 will be drawn into the first cavity 31. When the vent 5 is opened, the elastic sealing membrane 39 relies on its own elastic reset to seal the connecting hole 37 again, thereby realizing the intermittent, on-demand unidirectional flow of the lubricating fluid in the second cavity 32 into the first cavity 31. At the same time, the presence of the vent 5 can also ensure that the elastic membrane 33 can always elastically reset normally, thereby ensuring that the lubricating fluid is always sprayed out on demand according to the actual movement of the scale 21, realizing the adaptive supply of lubricant. Working principle: Before installing the pipe body 1, the corrugated strip 6 used to fix the scales 21 is broken, so that the scales 21 gradually spring up vertically from the receiving groove 24 under the elastic force of the elastic folding plate 23 in the C-shaped groove 22. When the pipe body 1 is placed into the underground channel and the pipe body 1 is pulled forward, the unevenness of the inner wall of the channel intermittently squeezes the scales 21, causing the scales 21 to fold and tilt in the opposite direction of the movement of the pipe body 1 along the C-shaped groove 22. The protrusions 34 on the surface of the scales 21 cooperate with the receiving groove 24 to make the outer surface of the pipe body 1 smooth and reduce the installation friction.

[0028] When the scales 21 fold, their ends compress the elastic membrane 33, causing the elastic membrane 33 to deflate, while the vent 5 is folded and sealed. The pressure generated by the deflation of the elastic membrane 33 forces the lubricating fluid in the first cavity 31 into the spray channel 36 through the suction channel 35. The lubricating fluid pushes the corrugated sleeve 41 to extend, causing the outlet hole 42 to open. The lubricating fluid seeps out through the outlet hole 42 to the surface of the scales 21, reducing the friction between the tube body 1 and the inner wall of the channel. When the scale 21 is no longer compressed, the elastic baffle 23 pushes the scale 21 back to its vertical position, the vent 5 opens, and the elastic membrane 33 expands and returns to its original position. Each time the scale 21 gradually becomes vertical, but before it reaches a vertical state, the vent 5 is closed, and the elastic membrane 33 generates suction to draw the elastic sealing membrane 39 out of the placement groove 38. The lubricating fluid in the second cavity 32 enters the first cavity 31 through the connecting hole 37 to replenish it. When the scale 21 is completely vertical, the vent 5 opens, the spray channel 36 stops spraying, the corrugated sleeve 41 contracts, the liquid outlet 42 closes, and the baffle 43 prevents external sand and gravel from entering.

[0029] When the tube 1 stops moving, multiple scales 21 remain vertical under the action of the elastic baffle 23. The ends of the scales 21 are embedded in the inner wall of the channel to form barbs, preventing the tube 1 from slipping due to gravity or terrain. Beneficial effects: The elastic baffle 23 within the C-shaped slot 22 drives the scales 21 to tilt in the direction of movement to reduce resistance when the pipe body 1 moves, and to form barbs vertically when the pipe body 1 is stationary. This achieves the effect of low resistance in the forward direction during pipe body 1 installation and self-locking in the reverse direction after installation, effectively preventing the underground pipe body 1 from slipping or shifting and improving installation stability. At the same time, the scales 21 intermittently fold and compress the elastic membrane 33, squeezing the lubricating fluid in the first cavity 31 through the spray channel 36 onto the surface of the scales 21, realizing automatic lubrication when the pipe body 1 moves and lubrication when stationary. The lubricant supply is stopped when the lubricant is stopped, so as to achieve the effect of supplying lubricant on demand and avoiding waste. This significantly reduces the frictional resistance between the tube body 1 and the inner wall of the channel, and improves the efficiency of long-distance installation. The linkage control between the vent hole 5 and the elastic sealing membrane 39 ensures that the first cavity 31 supplies lubricant each time the scale 21 is folded, and the second cavity 32 replenishes lubricant to the first cavity 31 each time it is upright. This achieves the effect of completing a lubrication replenishment cycle with each movement of the scale 21, ensuring continuous lubrication during continuous installation and avoiding jamming caused by lubrication interruption.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A trenchless MPP cable protection pipe comprising a pipe body (1): characterized in that, It also includes an anti-slip component (2) set on the tube body (1) to prevent the tube body (1) from slipping. The anti-slip component (2) includes multiple soft scales (21) fixedly set on the tube body (1) at equal angles. A C-shaped groove (22) for folding the scales (21) is opened on the lower side of the scales (21), and an elastic folding plate (23) is fixedly set inside the groove (22). When the tube body (1) moves, the scales (21) fold intermittently along the groove (22).

2. The trenchless MPP cable protection pipe according to claim 1, characterized in that, The surface of the tube (1) is provided with multiple storage slots (24), and the scales (21) are fixedly installed in the storage slots (24). When the scales (21) are folded, they form a complete arc surface with the storage slots (24). Multiple protrusions (34) are provided on one side of the scales (21).

3. The trenchless MPP cable protection pipe according to claim 2, characterized in that, A corrugated strip (6) for fixing the scale (21) is provided between the scale (21) and the groove (22).

4. The trenchless MPP cable protection pipe according to claim 3, characterized in that, The tube (1) is provided with a lubrication assembly (3) for lubrication when the tube (1) moves, and when the scales (21) fold intermittently, lubricating liquid is sprayed out from the lubrication assembly (3).

5. A trenchless MPP cable protection pipe according to claim 4, characterized in that, The lubrication assembly (3) includes multiple sets of cavities equally spaced within the tube body (1). Each scale (21) corresponds to one set of cavities, and each set of cavities includes a first cavity (31) and a second cavity (32). A connecting hole (37) is provided between the first cavity (31) and the second cavity (32), and a sealing element is provided on the connecting hole (37). The end of the scale (21) is located within the first cavity (31), and the first cavity (31) has multiple openings corresponding to the first cavity (31). A liquid suction channel (35) is provided through a cavity (31), and a liquid spraying channel (36) is provided on the tube body (1) that is connected to the liquid suction channel (35). The liquid spraying channel (36) extends to the outside of the scale (21). When the scale (21) is vertical, the liquid in the second cavity (32) enters the first cavity (31). When the scale (21) is folded, the liquid in the first cavity (31) is discharged indirectly through the liquid suction channel (35) and the liquid spraying channel (36).

6. A trenchless MPP cable protection pipe according to claim 5, characterized in that, A blockage prevention component (4) is provided on one side of the liquid suction channel (35) to prevent the liquid spraying channel (36) from being blocked.

7. A trenchless MPP cable protection pipe according to claim 6, characterized in that, The anti-clogging component (4) includes a corrugated sleeve (41) fixedly installed at the outlet of the spray channel (36), and the corrugated sleeve (41) is provided with a plurality of outlet holes (42) for lubricating fluid discharge, and a baffle (43) is fixedly installed on the outer side of the corrugated sleeve (41).

8. A trenchless MPP cable protection pipe according to claim 7, characterized in that, An elastic membrane (33) is provided at the top of the first cavity (31). The elastic membrane (33) and the first cavity (31) form a compression structure for injecting the lubricating fluid in the first cavity (31) into the spray channel (36). A vent hole (5) is provided between the elastic membrane (33) and the scale (21). The two ends of the vent hole (5) are respectively connected to the first cavity (31) and the tube (1). When the scale (21) is folded, the vent hole (5) is closed.

9. A trenchless MPP cable protection pipe according to claim 8, characterized in that, The sealing element includes a placement groove (38) formed between the first cavity (31) and the second cavity (32), and an elastic sealing membrane (39) for sealing the connecting hole (37) is fixedly disposed in the placement groove (38).

Images