PVC (polyvinyl chloride) compression-resistant corrugated pipe

Abstract

The invention relates to the technical field of corrugated pipes, in particular to a PVC compression-resistant corrugated pipe which comprises an outer pipe, the outer pipe comprises a first end and a first end tail which are arranged at the two ends of the outer pipe respectively, a wavy first corrugated part is arranged between the first end and the first end tail, a sleeving part is arranged on the first end, and a second corrugated part is arranged on the sleeving part. The sleeving part is used for sleeving the first end tail of another pipeline so as to connect a plurality of corrugated pipes; an inner pipe is further included, the inner pipe and the outer pipe are concentrically arranged, and the inner pipe is connected into the outer pipe in a sliding and sleeved mode. According to the corrugated pipe, the corrugated pipe is designed to be in the form that the inner pipe is sleeved with the outer pipe, the compressive strength of the corrugated pipe is improved, meanwhile, when the outer pipe of the corrugated pipe is damaged, the inner pipe can extend out in a sliding mode to be connected to another pipeline in a sleeving mode to make up a damaged opening, and the repairing convenience of the corrugated pipe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated pipes, in particular to a PVC pressure-resistant corrugated pipe. Background Art

[0002] Corrugated pipe is a kind of pipe. It is called corrugated pipe because its pipe wall is equipped with uniform convexities and concavities, and the pipe wall is like a wave. Corrugated pipe has a wide range of uses. Among them, PVC corrugated pipe is often used for large-scale water supply, water supply, drainage, sewage discharge, exhaust, subway ventilation, mine ventilation, farmland irrigation, etc. with a working pressure below 0.6MPa. In addition, it will also be set outside the cable and optical cable as a protective pipe for the cable and optical cable.

[0003] In existing water supply or drainage pipelines, when two PVC corrugated pipes are connected, the ends of the two PVC corrugated pipes are usually coated with glue and then sleeved and fixed. After long-term use, PVC corrugated pipes are prone to aging and damage under wind and sun. At this time, the damaged part of the PVC corrugated pipe needs to be replaced. When replacing the PVC corrugated pipe, it is necessary to cut and level the damaged part and then cut a section of the same type of PVC corrugated pipe to fill the damaged part and reconnect the pipe. Due to the complex and changeable actual situation and the different degree of damage to the pipeline, the length of the damaged part cut when repairing the PVC corrugated pipe is also inconsistent. The staff needs to take the longest replacement pipe to the repair site. After arriving, they need to cut the replacement pipe according to the actual situation, and then apply glue to the replacement pipe and plug it into the damaged position to fill it. The project workload is large and the repair efficiency is low. In addition, when filling the damaged pipe, in order to ensure a stable connection, the length of the replacement pipe used to fill the pipeline must be longer than the length cut at the damaged part, and the corrugated pipes in large pipelines are hard pipes, which are difficult to bend when filling the pipeline. It is also particularly difficult to insert the replacement pipe into the pipes at both ends of the damaged part.

[0004] In order to solve the problem of difficulty in repairing the damaged pipe of the corrugated pipe, a Chinese invention patent with application number: CN202110948979.5 and titled "A PVC Compression-Resistant Corrugated Pipe" proposes a solution, which includes a connecting pipe; a threaded rod is connected to the inner cavity of the connecting pipe in a radially rotatable manner; the threads at both ends of the threaded rod are arranged in opposite directions, and both ends of the threaded rod are threadedly connected to sliders; the outer wall of the slider is symmetrically fixedly connected to a support rod; the end of the support rod away from the slider is fixedly connected to a support plate; the other end of the threaded rod extends to the outer wall of the connecting pipe and is rotatably connected to the connecting pipe; when the connecting pipe is sleeved on the end of the damaged corrugated pipe, the slider is driven to move by rotating the threaded rod, and then the support rod and the support plate are connected to each other, so that the movement of the slider drives the support plate to move synchronously, thereby supporting the corrugated pipe, ensuring that the connection between the corrugated pipe and the connecting pipe is more stable, and the end of the corrugated pipe can still be made when it is wet and dusty, and can be installed quickly.

[0005] Although the above invention patent has improved the convenience of repairing the corrugated pipe to a certain extent, its connecting pipe is still longer than the damaged part, so it is still difficult to insert the connecting pipe into the damaged part to connect the two pipes, and the long-term impact of the threaded rod and the slider in the water pipe can easily loosen the threaded pipe, resulting in a decrease in the connection strength of the corrugated pipe. In addition, the existing PVC corrugated pipes of water supply and drainage pipe systems have low strength and weak pressure and impact resistance. Whether they are buried or installed outdoors, they are easily damaged by external pressure or collision.

[0006] To this end, a PVC pressure-resistant corrugated pipe is proposed to improve the strength of the PVC corrugated pipe used for water supply and drainage, and to improve the convenience of repairing the corrugated pipe after it is damaged. Summary of the invention

[0007] The purpose of the present invention is to provide a PVC pressure-resistant corrugated pipe, to improve the strength of the PVC corrugated pipe used for water supply and drainage, and to improve the convenience of repairing the corrugated pipe after it is damaged.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A PVC pressure-resistant corrugated pipe comprises an outer pipe, wherein the outer pipe comprises a first end head and a first end tail respectively arranged at two ends of the outer pipe, a wavy first corrugated portion is arranged between the first end head and the first end tail, a sleeve portion is arranged on the first end head, and the sleeve portion is used to sleeve the end tail of another pipe to connect multiple corrugated pipes; and an inner pipe is also included, wherein the inner pipe is concentrically arranged with the outer pipe and the inner pipe is slidably sleeved inside the outer pipe.

[0010] The inner tube is slidably sleeved inside the outer tube, and the inner tube supports the outer tube inside. The inner tube bears the water pressure and impact force inside, while the outer tube bears the external pressure. At the same time, the inner tube and the outer tube support each other to obtain a higher bearing capacity. The cooperation between the inner tube and the outer tube improves the pressure resistance of the entire bellows. When the outer tube is damaged by external collision or external pressure, the inner tube is still in good condition. When the staff repairs the pipeline system, they only need to cut off the outer tube and pull the inner tube along the axial direction of the outer tube to the cut break. The inner tube is used to replace the outer tube, and the inner tube is used to connect the two ends of the cut pipeline to repair the break. There is no need to use a new bellows to fill the break, and there is no need to plug a new bellows into the break. The design of the inner tube simplifies the operation of repairing the bellows, improves the efficiency of bellows repair, saves time for repairing the bellows, and improves the pressure resistance of the bellows.

[0011] Preferably, the first corrugated portion includes a plurality of first wave peaks protruding to the outside of the outer tube and a plurality of first wave troughs recessed into the inside of the outer tube; the inner tube includes a second end head corresponding to the first end head, and a second end tail corresponding to the first end tail, a second corrugated portion with a wave line is arranged between the second end head and the second end tail, and the second corrugated portion includes a plurality of second wave peaks protruding to the outside of the inner tube and a plurality of second wave troughs recessed into the inside of the inner tube; a plurality of the first wave peaks are aligned one by one with a plurality of the second wave troughs, a plurality of the first wave troughs are aligned one by one with a plurality of the second wave peaks, and the first wave troughs and the second wave peaks are abutted against each other; an annular pressure-resistant gap is formed between the first wave peaks and the second wave troughs corresponding to each other, and the same pressure-resistant gap is also formed between the first wave troughs and the second wave peaks corresponding to each other.

[0012] The first trough of the first corrugated part abuts the second crest of the second corrugated part, so that the pressure-resistant corrugated tube can be supported by the inner tube to improve the pressure resistance when subjected to pressure. When the inner tube or the outer tube is impacted, the first trough abuts the second crest of the second corrugated part and is dislocated due to vibration, so that the first corrugated part and the second corrugated part can undergo greater deformation to absorb the energy of the impact and avoid damage to the corrugated tube.

[0013] Preferably, a support is provided inside the first end, a convex block is provided on the second end, and a spring for energy absorption is provided between the convex block and the support. The spring helps to align the first wave crest and the second wave trough when the inner tube is installed. In addition, the spring can also absorb the kinetic energy of the water flow when the water flow impacts the inner tube to avoid damage to the inner tube. After the inner tube and the outer tube are dislocated after being impacted, the spring can also reset the inner tube to align with the outer tube.

[0014] Preferably, a through groove is provided on the first corrugated portion, and the through groove passes through the first end, the first end and the first trough on all the outer tubes respectively along the axial direction of the outer tube, and the through groove connects all the pressure-resistant gaps, and the through groove does not pass through the tube wall of the outer tube. The through groove passes through all the pressure-resistant gaps, allowing water to flow into each pressure-resistant gap through the through groove. Water is filled into the pressure-resistant gaps to serve as an energy-absorbing material between the outer tube and the inner tube. After the water is filled into the pressure-resistant gaps, the outer tube can be further supported. At the same time, the water can also reduce the impact transmission between the inner tube and the outer tube, thereby further avoiding the situation where the inner tube and the outer tube are damaged at the same time after being impacted, thereby ensuring the service life and pressure resistance of the corrugated tube.

[0015] Preferably, one end of the spring is fixedly connected to the protrusion, and the other end abuts against the support. The spring abuts against the support, so that the inner tube can rotate along the axis. When the inner tube is impacted by water flow or the outer tube is impacted and the impact force is transmitted to the inner tube, the inner tube can remove part of the impact force by rotating, thereby avoiding damage to the inner tube and increasing the life of the inner tube when impacted.

[0016] Preferably, the protrusion is detachably mounted on the second end. The protrusion protrudes from the outer wall of the inner tube, and the protrusion needs to be removed when the inner tube needs to be inserted into other pipes to repair the pipe. The detachable installation of the protrusion helps to further improve the convenience of workers when repairing the corrugated pipe system. At the same time, the detachable installation of the protrusion can avoid violent damage to the second end, avoid damaging the second end, and the detachable installation of the protrusion is conducive to the recovery of the protrusion and the spring, which is also conducive to green environmental protection.

[0017] Preferably, a ball is rotatably mounted on one end of the spring abutting against the support. When the inner tube rotates under force or moves along the axial direction, the ball can prevent the spring from wearing the support. At the same time, the ball can make the inner tube rotate more smoothly when it is impacted, which helps the inner tube to unload force through rotation and reduce the possibility of damage to the inner tube.

[0018] Preferably, a guide ring is rotatably installed inside the second end head, and a plurality of guide plates are evenly arranged on the inner circumference of the guide ring, and the guide plates are inclined at an angle to the cross section of the inner tube. The water flow flushes the guide plates to drive the guide ring to rotate, and the rotation of the guide ring can further absorb the kinetic energy of the water flow, thereby preventing the water flow from impacting the bellows, ensuring the service life of the bellows, and reducing the vibration of the bellows to avoid debonding and leakage at the connection of the bellows caused by vibration.

[0019] When the bellows is used as a water pipe, the guide ring rotates to absorb kinetic energy to avoid water hammer damage to the bellows; when the bellows is used as a drainage pipe, the guide ring rotates to guide the water flow to avoid the water flow suddenly blocking the pipe to form a water plug during the drainage process, ensuring smooth drainage. In addition, because the spring can only keep the inner tube reset in the direction of the first end, when the inner tube or the outer tube is impacted, if the spring is separated from the support, the spring cannot use elastic force to reset the inner tube, and the water flow flushing the guide plate will push the inner tube in the direction of the first end, which helps to ensure that the ball on the spring is always in contact with the support, ensuring that the inner tube can be stably reset, and helping to improve the stability of the bellows during use.

[0020] Preferably, the inner rings of the first end and the first end tail (102) are provided with annular reinforcement grooves, and the outer rings of the second end and the second end tail are also provided with annular reinforcement grooves. When the outer tube is damaged, the inner tube and the outer tube need to be glued and fixed, so that the inner tube acts as the outer tube, so as to repair the damaged pipeline and avoid leakage. After the reinforcement grooves are set at the first end and the first end tail and the second end and the second end tail, when the first end and the second end are glued, the glue will enter the inside of the reinforcement grooves on the first end and the second end, and the reinforcement grooves increase the contact area of ​​the glue, and also allow the solidified glue to form a tree-like complex structure, so that the glue is not easy to fall off, so that the first end and the second end can be connected more tightly. The reinforcement grooves at the first end tail and the second end tail are also based on the same principle, which can increase the stability of the first end tail and the second end tail when glued.

[0021] In addition, the provision of the reinforcement groove reduces the contact area between the first end and the second end, and the contact area between the first end and the second end. In this way, the inner tube is subjected to less resistance than the outer tube when it moves, and the inner tube can more easily offset the impact force by rotating and misaligning with the outer tube, thereby reducing the transmission of the impact force between the inner tube and the outer tube, and preventing the inner tube and the outer tube from being damaged at the same time after being subjected to the impact force.

[0022] Preferably, a lubricating layer is sprayed on both the first wave valley and the second wave peak, and the lubricating layer is a Teflon coating. The lubricating layer can make the first wave valley and the second wave peak more easily misaligned when the outer tube or the inner tube is impacted, so that the outer tube or the inner tube can offset the impact by deformation, thereby avoiding damage to the bellows. At the same time, the inner tube is also more likely to offset the kinetic energy of the impact by relative rotation with the outer tube, thereby avoiding damage to the inner tube.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The PVC pressure-resistant corrugated pipe designed by the present invention improves the compressive strength of the corrugated pipe by designing the corrugated pipe into an outer pipe sleeved with an inner pipe. At the same time, when the outer pipe of the corrugated pipe is damaged, the inner pipe can be slid out and sleeved on another pipe to fill the damaged opening, thereby improving the convenience of repairing the corrugated pipe.

[0025] 2. A PVC compression-resistant corrugated pipe designed by the present invention has a second corrugated portion on the inner pipe, and the first wave trough of the first corrugated portion abuts against the second wave crest of the second corrugated portion, so that the compression-resistant corrugated pipe can be supported by the inner pipe to improve the compression resistance when subjected to pressure. When the inner pipe or the outer pipe is impacted, the first wave trough abuts against the second wave crest of the second corrugated portion and is dislocated due to vibration, so that the first corrugated portion and the second corrugated portion can undergo greater deformation to absorb the energy of the impact, thereby avoiding damage to the corrugated pipe.

[0026] 3. A PVC pressure-resistant corrugated pipe designed by the present invention has a through groove on the inner side of the outer pipe, and the through groove penetrates all the pressure-resistant gaps so that water can flow into each pressure-resistant gap through the through groove. Water is filled into the pressure-resistant gaps to serve as an energy-absorbing material between the outer pipe and the inner pipe. After the water is filled into the pressure-resistant gaps, the outer pipe can be further supported. At the same time, the water can also reduce the impact transmission between the inner pipe and the outer pipe, thereby further avoiding the situation where the inner pipe and the outer pipe are damaged at the same time after being impacted, thereby ensuring the service life and pressure-resistant effect of the corrugated pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 An exploded view of the present invention;

[0029] Figure 3 A three-dimensional schematic diagram of the corrugated pipes of the present invention connected to each other;

[0030] Figure 4 It is a left side view of the present invention;

[0031] Figure 5 It is a schematic diagram of the internal structure of the bellows of the present invention when they are connected to each other;

[0032] Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle;

[0033] Figure 7 It is a schematic diagram of the state when the first wave crest and the second wave trough are misaligned in the present invention;

[0034] Figure 8 This is a schematic diagram of filling and repairing when the outer tube is partially damaged in the present invention;

[0035] Fig. 9 It is a schematic diagram of the state in which the inner tube replaces the outer tube after the outer tube is destroyed in the present invention.

[0036] In the figure: 1, outer tube; 101, first end; 102, first end tail; 103, first corrugated portion; 1031, first wave crest; 1032, first wave trough; 2, sleeve portion; 3, inner tube; 301, second end; 302, second end tail; 303, second corrugated portion; 3031, second wave crest; 3032, second wave trough; 4, pressure-resistant gap; 5, support platform; 6, bump; 7, spring; 8, through groove; 9, ball; 10, guide ring; 11, guide plate; 12, reinforcement groove; D1, water flow direction. DETAILED DESCRIPTION

[0037] See also Figures 1 to 9 The present invention provides a PVC pressure-resistant corrugated pipe, and the technical solution is as follows:

[0038] A PVC pressure-resistant corrugated pipe comprises an outer pipe 1, wherein the outer pipe 1 comprises a first end 101 and a first end tail 102 respectively arranged at two ends of the outer pipe 1, a sleeve connection portion 2 is arranged on the first end 101, a first corrugated portion 103 is arranged between the first end 101 and the first end tail 102, the first corrugated portion 103 comprises a plurality of first wave crests 1031 protruding toward the outside of the outer pipe 1 and a plurality of first wave troughs 1032 recessed toward the inside of the outer pipe 1, the first wave crests 1031 and the first wave troughs 1032 are arranged in sequence at intervals to form a continuous wave shape; the sleeve connection portion 2 is used for sleeve connection with the first end tail 102 of another pipe to connect multiple corrugated pipes.

[0039] In addition, reference Figure 2 as well as Figures 5 to 7 , and also includes an inner tube 3, which is concentrically arranged with the outer tube 1 and slidably sleeved inside the outer tube 1. The inner tube 3 includes a second terminal 301 corresponding to the first terminal 101, and a second end 302 corresponding to the first end 102, a second corrugated portion 303 with a wave line is arranged between the second terminal 301 and the second end 302, and the second corrugated portion 303 includes a plurality of second wave crests 3031 protruding toward the outside of the inner tube 3 and a plurality of second wave valleys 3032 recessed toward the inside of the inner tube 3, and the second wave crests 3031 and the second wave valleys 3032 are also arranged in sequence and spaced apart to form a continuous wave shape. Among them, the outer wall of the second terminal 301 is in close contact with the inner wall of the first terminal 101, and the outer wall of the second end 302 is in close contact with the inner wall of the first end 102. The first end 101 and the first end tail 102 are provided with an annular reinforcement groove 12 on their inner rings, and the second end 301 and the second end tail 302 are also provided with an annular reinforcement groove 12 on their outer rings. The reinforcement groove 12 at the first end 101 is provided on the inner ring of the sleeve 2.

[0040] refer to Figure 2 , Figure 6 and Figure 7 A support platform 5 is provided inside the first end 101, and a protrusion 6 is provided on the second end 301, and the protrusion 6 is detachably mounted on the second end 301 by screws. A spring 7 for absorbing energy is provided between the protrusion 6 and the support platform 5. One end of the spring 7 is fixedly connected to the protrusion 6, and the other end abuts on the support platform 5, and a ball 9 is rotatably mounted on one end of the spring 7 abutting on the support platform 5.

[0041] refer to Figure 5 , Figure 6 and Figure 7 , multiple first wave crests 1031 are aligned one by one with multiple second wave valleys 3032, multiple first wave valleys 1032 are aligned one by one with multiple second wave crests 3031, and the first wave valleys 1032 and the second wave crests 3031 are in contact with each other; an annular pressure-resistant gap 4 is formed between the mutually aligned first wave crests 1031 and the second wave valleys 3032, and the same pressure-resistant gap 4 is also formed between the mutually aligned first wave valleys 1032 and the second wave crests 3031. A through groove 8 is provided on the first corrugated portion 103, and the through groove 8 passes through the first end 101, the first end tail 102 and all the first wave valleys 1032 on the outer tube 1 along the axial direction of the outer tube 1, and the through groove 8 connects all the pressure-resistant gaps 4, and the through groove 8 does not pass through the tube wall of the outer tube 1, that is, the through groove 8 will not penetrate the inner wall and the outer wall of the first corrugated portion 103. A lubricating layer is sprayed on both the first wave valley 1032 and the second wave peak 3031 . The lubricating layer is a Teflon coating. The lubricating layer is used to reduce the friction between the first wave valley 1032 and the second wave peak 3032 .

[0042] refer to Figure 2 A guide ring 10 is rotatably installed inside the second end head 301, and a plurality of guide vanes 11 are evenly distributed on the circumference of the guide ring 10. The guide vanes 11 are inclined at an angle to the cross section of the inner tube 3. During installation, the guide ring 10 is rotatably connected to the second end head 301, and the guide ring 10 shall not move along the axial direction of the inner tube 3.

[0043] refer to Figure 2 , Figure 3 and Figure 5 During installation, the first end 101 of the outer tube 1 is connected to the pipeline system, and the water flow direction D1 needs to be ensured to enter the outer tube 1 from the first end 101 and flow out of the outer tube 1 from the first end 102. Then, the first end 101 of another corrugated pipe is sleeved on the end of the first corrugated pipe, and glue is used to bond the connection to prevent the two corrugated pipes from loosening and leaking. The corrugated pipes are connected in sequence in this reciprocating operation until the pipeline system is installed.

[0044] refer to Figure 2 and Figure 5When the bellows is in use, water flows into the outer tube 1 from the first end 101, and enters the inner tube 3 through the second end 301. When the water flows through the second end 301, it will wash the guide plate 11 and drive the guide ring 10 inside the first end 101 to rotate. The rotation of the guide ring 10 allows the water to spiral along the wall of the inner tube 3, making the water flow more stable, reducing the vibration of the bellows, and ensuring the service life of the bellows. In addition, when the guide ring 10 rotates, it will also absorb the power of the water flow, convert the kinetic energy of the water flow into the kinetic energy of the rotation of the guide ring 10, slow down the speed of the water flow, and avoid the water flow speed from impacting the inner tube 3 too fast and causing damage.

[0045] refer to Figure 5 , Figure 6 and Figure 7 When water flows through the inner tube 3, it will also flow from the through groove 8 into the pressure-resistant gap 4 between the inner tube 3 and the outer tube 1, and eventually each pressure-resistant gap 4 will be filled with water. When the inner tube 3 and the outer tube 1 are not impacted, the inner tube 3 bears the water pressure inside, and the outer tube 1 bears the external pressure. The inner tube 3 and the outer tube 1 are supported by each other through the mutual contact between the first wave valley 1032 and the second wave peak 3031, and the water inside the pressure-resistant space will also support the inner tube 3 and the outer tube 1, thereby ensuring the pressure resistance of the entire corrugated tube. When the inner tube 3 or the outer tube 1 is impacted, the contact area between the first wave valley 1032 and the second wave peak 3031 between the inner tube 3 and the outer tube 1 is small. After the inner tube 3 and the outer tube 1 are impacted, the inner tube 3 and the outer tube 1 are easily dislocated along the axis under the action of the impact. At this time, the first wave valley 1032 and the second wave peak 3031 are also dislocated and no longer abut, reducing the mutual transmission of the impact between the inner tube 3 and the outer tube 1. At the same time, after the inner tube 3 or the outer tube 1 is impacted, the first corrugated part 103 and the second corrugated part 303 can have a larger space to deform, and the energy of the impact is released by deformation, avoiding damage to the outer tube 1 and the inner tube 3. When the first wave valley 1032 and the second wave crest 3031 are misaligned, the first wave crest 1031, the first wave valley 1032 and the second wave crest 3031, the second wave valley 3032 will squeeze the water inside the anti-pressure gap 4, and the water inside the anti-pressure gap 4 will be discharged from the through groove 8 to the outside of the anti-pressure gap 4 after being squeezed. However, since the through groove 8 is small, the speed at which the water is discharged from the outside of the anti-pressure gap 4 is slow, so the water inside the anti-pressure gap 4 becomes a buffer liquid when the first wave valley 1032 and the second wave crest 3031 are misaligned, further avoiding damage to the inner tube 3 and the outer tube 1 caused by the impact, and ensuring the service life of the corrugated tube. In addition, when the inner tube 3 or the outer tube 1 is impacted, the inner tube 3 can also unload the impact force by rotating, further ensuring that the inner tube 3 will not be damaged.

[0046] refer to Figure 5 and Figure 7 If the impact causes the inner tube 3 to move toward the first end 102, the spring 7 will drive the inner tube 3 to reset under the action of elastic force after the impact ends, so that the second wave peak 3031 on the inner tube 3 is aligned with the first wave valley 1032 on the outer tube 1 again. If the impact causes the inner tube 3 to move toward the first end 101, the spring 7 will be separated from the support 5, and the spring 7 cannot reset the inner tube 3 by elastic force. However, due to the scouring of the second end 301 and the scouring of the guide plate 11 by the water flow, the water flow will give the inner tube 3 a driving force to reset the inner tube 3.

[0047] When the inner tube 3 is damaged after long-term use, since the outer tube 1 is not damaged, the pipeline will not leak, so there is no need to replace the inner tube 3.

[0048] refer to Figure 8 When the outer tube 1 is damaged due to long-term use, since the second end 301 and the first end 101 are tightly fitted, and the second end tail 302 and the first end tail 102 are also tightly fitted, when the outer tube 1 is damaged, water leakage will only leak through the through groove 8 toward the damaged part. Because the through groove 8 itself is small, the amount of water leakage after the outer tube 1 is damaged is also small, which can give maintenance personnel sufficient time to deal with it.

[0049] refer to Figure 8 When repairing the damaged part of the outer tube 1, you can choose to directly fill the sealing glue from the damaged part into the space between the outer tube 1 and the inner tube 3, and use the glue to fill the pressure-resistant gap 4 between the outer tube 1 and the inner tube 3. After waiting for the glue to solidify, the inner tube 3 and the outer tube 1 can be completely fixed together, so that the inner tube 3 and the outer tube 1 form a whole, and the damaged part can be repaired.

[0050] In addition, reference Fig. 9 When the breach is large, the outer tube 1 can be completely cut off, and the protrusion 6 and spring 7 on the second end 301 can be removed by a screwdriver, and the second end 301 and the second end tail 302 of the inner tube 3 can be respectively inserted into the outer tube 1 inside the corrugated tube before and after the breach, and the inner tube 3 can be directly used as the outer tube 1, and the inner tube 3 and the corrugated tubes at both ends of the breach can be glued and fixed, which is convenient for maintenance. It should be noted that since the outer tube 1 of the corrugated tube at both ends of the breach is provided with a through groove 8, the notch of the through groove 8 needs to be blocked during bonding to prevent water from leaking out from the through groove 8. During bonding, the glue fills the gap at the connection, and the glue enters the reinforcement groove 12. After the glue solidifies, a tree-like fork is formed, which improves the stability of bonding.

[0051] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A PVC pressure-resistant corrugated pipe, comprising an outer pipe (1), the outer pipe (1) comprising a first end head (101) and a first end tail (102) respectively arranged at two ends of the outer pipe (1), a first corrugated portion (103) in a wave shape is arranged between the first end head (101) and the first end tail (102), a sleeve portion (2) is arranged on the first end head (101), and the sleeve portion (2) is used to sleeve the first end tail (102) of another pipe to connect multiple corrugated pipes; characterized in that: It also comprises an inner tube (3), wherein the inner tube (3) is arranged concentrically with the outer tube (1), and the inner tube (3) is slidably sleeved inside the outer tube (1).

2. A PVC pressure-resistant corrugated pipe according to claim 1, characterized in that: The first corrugated portion (103) comprises a plurality of first wave crests (1031) protruding toward the outside of the outer tube (1) and a plurality of first wave troughs (1032) recessed toward the inside of the outer tube (1); the inner tube (3) comprises a second end head (301) corresponding to the first end head (101) and a second end tail (302) corresponding to the first end tail (102); a second corrugated portion (303) with a wave line is arranged between the second end head (301) and the second end tail (302); the second corrugated portion (303) comprises a plurality of second wave crests (3031) protruding toward the outside of the inner tube (3) and a plurality of first wave troughs (1032) recessed toward the inside of the outer tube (1); The inner tube (3) has a plurality of second wave valleys (3032) that are recessed inside; the plurality of first wave peaks (1031) are aligned one by one with the plurality of second wave valleys (3032); the plurality of first wave valleys (1032) are aligned one by one with the plurality of second wave peaks (3031); and the first wave valleys (1032) and the second wave peaks (3031) are in contact with each other; an annular pressure-resistant gap (4) is formed between the first wave peaks (1031) and the second wave valleys (3032) that correspond to each other, and the same pressure-resistant gap (4) is also formed between the first wave valleys (1032) and the second wave peaks (3031) that correspond to each other.

3. A PVC pressure-resistant corrugated pipe according to claim 1, characterized in that: A support platform (5) is arranged inside the first end head (101), a protrusion (6) is arranged on the second end head (301), the protrusion (6) can be detachably mounted on the second end head (301), and a spring (7) for absorbing energy is arranged between the protrusion (6) and the support platform (5).

4. A PVC pressure-resistant corrugated pipe according to claim 2, characterized in that: A through groove (8) is provided on the first corrugated portion (103), and the through groove (8) respectively penetrates the first end (101), the first end tail (102) and all the first troughs (1032) on the outer tube (1) along the axial direction of the outer tube (1), the through groove (8) is connected to all the pressure-resistant gaps (4), and the through groove (8) does not penetrate the tube wall of the outer tube (1).

5. The PVC pressure-resistant corrugated pipe according to claim 3, characterized in that: One end of the spring (7) is fixedly connected to the protrusion (6), and the other end abuts against the support platform (5). A ball (9) is rotatably mounted on the end of the spring (7) abutting against the support platform (5).

6. A PVC pressure-resistant corrugated pipe according to claim 2, characterized in that: An annular reinforcement groove (12) is provided on the inner ring of the first end head (101) and the first end tail (102), and an annular reinforcement groove (12) is also provided on the outer ring of the second end head (301) and the second end tail (302).

7. The PVC pressure-resistant corrugated pipe according to claim 2, characterized in that: A lubricating layer is sprayed on both the first wave valley (1032) and the second wave peak (3031), and the lubricating layer is a Teflon coating.

8. The PVC pressure-resistant corrugated pipe according to claim 3, characterized in that: A guide ring (10) is rotatably mounted inside the second end head (301), and a plurality of guide vanes (11) are evenly distributed on the circumference of the guide ring (10), wherein the guide vanes (11) form an inclined angle with the cross section of the inner tube (3).

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