High-strength pressure-resistant CPVC cable protection pipe

Abstract

The utility model discloses a kind of high-strength pressure-resistant CPVC cable protection pipe, belong to cable protection facility technical field, its technical scheme main points include pipe body, the both ends of the pipe body are respectively provided with flange end and recess end, the flange end and recess end cooperation form socket-and-spigot type connecting structure, the inside of the pipe body is provided with center pressure-bearing column, and the surface of center pressure-bearing column is annularly provided with a plurality of pressure-bearing plate integrated with it, cable placing cavity is formed between adjacent pressure-bearing plate, by the multilayer composite structure of pipe body and inside center pressure-bearing column, pressure-bearing plate form inside and outside collaborative support, greatly improve overall extrusion resistance, can resist underground buried depth pressure or ground heavy object rolling pressure, avoid pipe body deformation rupture, and buffering heat insulation layer absorbs external impact energy through closed-cell bubble, reduce construction collision, stone impact damage to pipe body, and inner wall anticorrosive layer and CPVC outer pipe layer cooperate to resist corrosion and wear, adapt to complex soil environment.

Description

Technical Field

[0001] This utility model relates to the field of cable protection facilities technology, and in particular to a high-strength, pressure-resistant CPVC cable protection pipe. Background Technology

[0002] CPVC (chlorinated polyvinyl chloride) cable protection pipes are widely used for the protection of underground cables due to their corrosion resistance and good insulation properties.

[0003] In actual use, the cable is placed in the protective pipe and protected by the pipe. The cable protection pipe is pre-buried. The protective pipe usually contains multiple cables together, which makes it difficult to install them into the pipe. An existing patent (publication number: CN219592055U) discloses a CPVC cable protection pipe. This utility model sets up a fixed partition structure inside the protection pipe body. In use, the cable is inserted into the partition plate through a fixed rope in sequence. Then, the partition plate carrying the cable is inserted into the protection pipe body through the insertion groove inside the protection pipe body, thereby realizing the fixed partition function.

[0004] To address the aforementioned issues, existing patents offer solutions. While these solutions can separate cables and prevent them from tangling, existing CPVC cable protection pipes lack sufficient compressive strength. When buried at greater depths or subjected to heavy ground pressure, they are prone to deformation or even breakage, leading to exposed internal cables and posing safety hazards. Furthermore, their impact resistance is weak, making them susceptible to cracks or breakage when subjected to external forces such as collisions with construction machinery or impacts from stones. This is especially true in cold northern regions where the breakage rate is extremely high during winter construction.

[0005] Therefore, a high-strength, pressure-resistant CPVC cable protection pipe is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a high-strength, pressure-resistant CPVC cable protection pipe that can solve the problems of insufficient compressive strength of existing CPVC cable protection pipes, which are prone to deformation or even cracking when buried at a great depth or subjected to heavy objects on the ground, resulting in exposed internal cables and posing safety hazards. In addition, the pipes have weak impact resistance and are prone to cracking or breaking when subjected to external forces such as collisions with construction machinery or impacts from stones, especially in cold northern regions where the breakage rate is extremely high during winter construction.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-strength pressure-resistant CPVC cable protection pipe, comprising a pipe body, wherein both ends of the pipe body are respectively provided with a flange end and a groove end, the flange end and the groove end cooperate to form a socket connection structure, a central pressure-bearing column is provided inside the pipe body, and a plurality of pressure-bearing plates integrally formed therewith are arranged in a ring on the surface of the central pressure-bearing column, a cable placement cavity is formed between adjacent pressure-bearing plates, and the ends of the pressure-bearing plates are inserted into the inner wall of the pipe body; The pipe body includes an inner anti-corrosion layer, a reinforcing skeleton layer, a CPVC inner pipe layer, a buffer insulation layer, and a CPVC outer pipe layer, which are arranged sequentially from the inside to the outside.

[0008] Preferably, the inner wall anti-corrosion layer is made of hot-dip plastic anti-corrosion material.

[0009] Preferably, the reinforcing skeleton layer is made of glass fiber reinforced material and is wound in a 45-degree interlocking ring around the inner side of the CPVC inner tube layer, and the reinforcing skeleton layer and the CPVC inner tube layer are connected by hot melt adhesive.

[0010] Preferably, the buffer insulation layer is made of foamed CPVC material, and closed-cell air bubbles are evenly distributed inside the buffer insulation layer.

[0011] Preferably, the outer side of the flange end is provided with two annular sealing grooves, the interior of the annular sealing grooves is provided with stepped silicone sealant, and the inner side of the groove end is provided with an annular protrusion that cooperates with the annular sealing grooves.

[0012] Preferably, the stepped silicone seal has a mountain-shaped cross-section, and the inner wall and surface of the stepped silicone seal are tightly fitted with the annular sealing groove and the annular protrusion, respectively.

[0013] Preferably, the pressure plate has a connecting protrusion on the side away from the central pressure column, and an insertion groove is provided on the inner wall of the pipe corresponding to the position of the connecting protrusion. The pressure plate is inserted into the pipe through the connecting protrusion and the insertion groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This application uses the multi-layer composite structure of the pipe body to form an internal and external synergistic support with the internal central pressure-bearing column and pressure plate, which greatly improves the overall compression resistance and can withstand the pressure of underground burial depth or the crushing of heavy objects on the ground, avoiding the deformation and cracking of the pipe body. In addition, the buffer insulation layer absorbs the external impact energy through closed-cell air bubbles, reducing the damage to the pipe body caused by construction collisions and stone impacts. The inner wall anti-corrosion layer and the CPVC outer pipe layer work together to resist corrosion and wear, adapting to complex soil environments. 2. This application uses a socket structure formed by the flange end and the groove end, which can facilitate quick installation and has high connection strength. Furthermore, the ladder-type silicone sealant cooperates with the double annular sealing groove to form a tight seal, effectively preventing groundwater from seeping in and protecting the cable from immersion. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the high-strength, pressure-resistant CPVC cable protection pipe of this utility model; Figure 2 This is a schematic diagram showing the connection between the flange end and the groove end of this utility model; Figure 3 This is a cross-sectional schematic diagram of the stepped silicone seal of this utility model; Figure 4 This is a schematic diagram showing the connection between the pressure plate and the pipe body of this utility model; Figure 5 This is a cross-sectional schematic diagram of the tube body of this utility model.

[0016] In the diagram, 1. Pipe body; 11. Inner wall anti-corrosion layer; 12. Reinforcing skeleton layer; 13. CPVC inner pipe layer; 14. Buffer insulation layer; 15. CPVC outer pipe layer; 2. Flange end; 3. Groove end; 4. Central pressure-bearing column; 5. Pressure-bearing plate; 6. Installation cavity; 7. Annular sealing groove; 8. Stepped silicone sealant; 9. Annular protrusion; 10. Connecting protrusion; 16. Insertion groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5 The present invention provides the following technical solution: A high-strength pressure-resistant CPVC cable protection pipe includes a pipe body 1. The two ends of the pipe body 1 are respectively provided with a flange end 2 and a groove end 3. The flange end 2 and the groove end 3 cooperate to form a socket connection structure. A central pressure-bearing column 4 is provided inside the pipe body 1, and several pressure-bearing plates 5 are provided in a ring on the surface of the central pressure-bearing column 4. A cable placement cavity 6 is formed between adjacent pressure-bearing plates 5. The ends of the pressure-bearing plates 5 are inserted into the inner wall of the pipe body 1. The pipe body 1 includes an inner wall anti-corrosion layer 11, a reinforcing skeleton layer 12, a CPVC inner pipe layer 13, a buffer insulation layer 14, and a CPVC outer pipe layer 15, which are arranged sequentially from the inside to the outside.

[0019] In this embodiment: the pipe body 1 is connected in multiple sections through the socketing of the flange end 2 and the groove end 3 to form a continuous cable protection channel. The central pressure-bearing column 4 inside the pipe body 1 is inserted into the inner wall of the pipe body 1 through the ring-shaped distribution of pressure-bearing plates 5. The cable placement cavity 6 between the pressure-bearing plates 5 is used to place each cable individually. When the pipe body 1 is subjected to external pressure, the central pressure-bearing column 4 and the pressure-bearing plates 5 jointly bear the load and distribute the force to the whole pipe body 1. The multi-layer composite structure of the pipe body 1 (from the inner wall anti-corrosion layer 11 to the CPVC outer pipe layer 15 with closed-cell bubbles) successively plays the roles of anti-corrosion, reinforcement, buffering and protection, ensuring the structural stability of the pipe body 1.

[0020] Beneficial effects: The combined internal and external support structure solves the problem of insufficient pressure resistance of traditional pipe body 1; the cable placement cavity 6 avoids cable entanglement and improves laying efficiency; the multi-layer composite structure takes into account corrosion resistance, impact resistance and wear resistance, adapts to complex underground environments, and extends the service life of the protective pipe.

[0021] Specifically, such as Figure 5 As shown, the inner wall anti-corrosion layer 11 is made of hot-dip plastic anti-corrosion material.

[0022] Specifically, such as Figure 5 As shown, the reinforcing skeleton layer 12 is made of glass fiber reinforced material and is wrapped in a 45° cross ring around the inner side of the CPVC base tube layer. The reinforcing skeleton layer 12 and the CPVC inner tube layer 13 are connected by hot melt adhesive.

[0023] Specifically, such as Figure 5 As shown, the buffer insulation layer 14 is made of foamed CPVC material, and closed-cell air bubbles are evenly distributed inside the buffer insulation layer 14.

[0024] In this embodiment: a continuous anti-corrosion barrier is formed by hot-dip plastic anti-corrosion material, which effectively improves the resistance of the pipe body 1 to corrosive media, protects the internal cable from corrosion, and solves the problem of easy aging of the inner wall of traditional CPVC pipes, making it especially suitable for special geological environments such as saline-alkali land; the high strength characteristics and cross-wound design of glass fiber reinforced material significantly improve the ring stiffness of the pipe body 1 and enhance its extrusion resistance; the tight bonding with the CPVC inner tube layer 13 avoids delamination, solves the problem of insufficient pressure resistance of traditional single structure, and is suitable for high burial depth scenarios; the buffer insulation layer 14 is made of foamed CPVC material, and its internal closed-cell air bubbles absorb the impact energy through air bubble compression and rebound when the pipe body 1 is subjected to external impact (such as collision with construction machinery), reducing the impact of impact force on the core structure of the pipe body 1 (reinforced skeleton layer 12, CPVC inner tube layer 13). At the same time, the closed-cell air bubbles form an air insulation layer, reducing condensation caused by temperature difference between the inside and outside of the pipe, and preventing moisture inside the pipe from affecting the insulation performance of the cable.

[0025] Specifically, such as Figure 2 As shown, two annular sealing grooves 7 are provided on the outer side of the flange end 2, and a stepped silicone sealant 8 is provided inside the annular sealing groove 7. An annular protrusion 9 that cooperates with the annular sealing groove 7 is provided on the inner side of the groove end 3.

[0026] Specifically, such as Figure 3 As shown, the stepped silicone seal 8 has a mountain-shaped cross section, and the inner wall and surface of the stepped silicone seal 8 are tightly fitted with the annular sealing groove 7 and the annular protrusion 9, respectively.

[0027] In this embodiment: When the pipe body 1 is connected, the flange end 2 is inserted into the groove end 3. The annular sealing groove 7 on the outside of the flange end 2 and the annular protrusion 9 on the inside of the groove end 3 correspondingly compress the stepped silicone seal 8. The two annular sealing grooves 7 form a double sealing defense line. After the seal is compressed, it tightly fills the gap between the groove and the protrusion, preventing groundwater and soil particles from seeping into the pipe from the connection seam. The double sealing structure solves the problem of poor sealing performance of traditional socket connection, effectively blocking external moisture and impurities and protecting the cable safety. The stepped silicone seal 8 has a "mountain" shaped cross section. When the flange end 2 and the groove end 3 are connected, the "mountain" shaped protrusion of the seal is tightly attached to the inner wall of the annular sealing groove 7 and the surface of the annular protrusion 9 respectively. When compressed, the multiple contact points of the "mountain" shaped structure deform simultaneously, increasing the sealing area and the contact pressure, forming multiple sealing barriers. Even if a small gap appears locally, the other contact points can still maintain a seal.

[0028] Specifically, such as Figure 4 As shown, a connecting protrusion 10 is provided on the side of the pressure plate 5 away from the central pressure column 4, and an insertion groove 16 is provided on the inner wall of the pipe body 1 at the position corresponding to the connecting protrusion 10. The pressure plate 5 is inserted into the pipe body 1 through the connecting protrusion 10 and the insertion groove 16.

[0029] In this embodiment: the connecting protrusion 10 at the end of the pressure plate 5 is inserted into the insertion groove 16 on the inner wall of the pipe body 1 to achieve a fixed connection with the pipe body 1. During installation, the pressure plate 5 is first assembled with the central pressure column 4, and then the whole is fixed in the pipe by the cooperation of the connecting protrusion 10 and the insertion groove 16. An independent cable placement cavity 6 is formed between the pressure plates 5. When the pipe body 1 is subjected to radial force, the cooperation of the connecting protrusion 10 and the insertion groove 16 prevents the pressure plate 5 from shifting, ensuring that the cable placement cavity 6 is structurally stable and the cable does not shake.

[0030] Working principle: When connecting multiple protective pipe sections, the flange end 2 of the preceding section is inserted into the groove end 3 of the following section. The two annular sealing grooves 7 on the outer side of the flange end 2 and the annular protrusions 9 on the inner side of the groove end 3 correspondingly compress the stepped silicone seal 8. After being compressed, the "mountain"-shaped seal tightly fits the inner wall of the sealing groove and the surface of the annular protrusion 9, forming multiple sealing barriers to effectively prevent groundwater and soil particles from seeping in from the connection joint. When the protective pipe is buried underground or subjected to external loads, the multi-layer structure of the pipe body 1 and the internal support work together to bear the force: the glass fiber of the reinforcing skeleton layer 12 is wrapped at 45° to form a "grid skeleton", which evenly distributes the radial pressure to the CPVC inner pipe layer 13, avoiding local stress concentration. The central pressure-bearing column 4 transmits part of the pressure to the inner wall of the pipe body 1 through the pressure-bearing plate 5, forming a dual resistance system of internal support and external pressure bearing. To prevent deformation of the pipe body 1, if subjected to external forces such as collisions with construction machinery or impacts from stones, the closed-cell air bubbles of the buffer insulation layer 14 absorb the impact energy through compression deformation, reducing damage to the internal structure. Especially in low-temperature environments, the toughness of the foamed CPVC material can reduce the risk of brittle fracture of the pipe body 1. The inner wall anti-corrosion layer 11 is tightly attached to the inside of the pipe body 1, directly contacting the cable and the water vapor inside the pipe. With its excellent chemical stability, it resists the acid and alkali substances that seep into the soil, preventing aging or scaling of the inner wall and protecting the cable insulation layer from corrosion. The CPVC outer pipe layer 15 works synergistically with the buffer insulation layer 14. The CPVC outer pipe layer 15 resists soil friction and external corrosion, while the closed-cell air bubbles of the buffer insulation layer 14 reduce condensation caused by temperature differences between the inside and outside of the pipe, avoiding the impact of the humid environment inside the pipe on the cable, and ensuring long-term stable operation in complex environments such as saline-alkali land and high humidity.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-strength, pressure-resistant CPVC cable protection pipe, comprising a pipe body (1), characterized in that: The pipe body (1) has a flange end (2) and a groove end (3) at both ends respectively. The flange end (2) and the groove end (3) cooperate to form a socket connection structure. The pipe body (1) is provided with a central pressure-bearing column (4), and the surface of the central pressure-bearing column (4) is provided with several pressure-bearing plates (5) integrated with it in a ring. A cable placement cavity (6) is formed between adjacent pressure-bearing plates (5). The end of the pressure-bearing plate (5) is inserted into the inner wall of the pipe body (1). The pipe body (1) includes an inner wall anti-corrosion layer (11), a reinforcing skeleton layer (12), a CPVC inner pipe layer (13), a buffer insulation layer (14), and a CPVC outer pipe layer (15), which are arranged sequentially from the inside to the outside.

2. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 1, characterized in that: The inner wall anti-corrosion layer (11) is made of hot-dip plastic anti-corrosion material.

3. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 1, characterized in that: The reinforcing skeleton layer (12) is made of glass fiber reinforced material and is wrapped in a 45-degree interlocking ring around the inner side of the CPVC inner tube layer (13). The reinforcing skeleton layer (12) and the CPVC inner tube layer (13) are connected by hot melt adhesive.

4. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 1, characterized in that: The buffer insulation layer (14) is made of foamed CPVC material, and closed-cell air bubbles are evenly distributed inside the buffer insulation layer (14).

5. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 1, characterized in that: Two annular sealing grooves (7) are provided on the outer side of the flange end (2). A stepped silicone sealant (8) is provided inside the annular sealing groove (7). An annular protrusion (9) that cooperates with the annular sealing groove (7) is provided on the inner side of the groove end (3).

6. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 5, characterized in that: The stepped silicone seal (8) has a mountain-shaped cross section, and the inner wall and surface of the stepped silicone seal (8) are tightly fitted with the annular sealing groove (7) and the annular protrusion (9), respectively.

7. The high-strength, pressure-resistant CPVC cable protection pipe according to claim 1, characterized in that: The pressure plate (5) is provided with a connecting protrusion (10) on the side away from the central pressure column (4), and the inner wall of the pipe body (1) is provided with a plug groove (16) corresponding to the position of the connecting protrusion (10). The pressure plate (5) is plugged into the pipe body (1) through the connecting protrusion (10) and the plug groove (16).

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