A communication pipe and a method for manufacturing the same

Abstract

The application discloses a communication pipe, comprising a main support, a plurality of installation columns and a plurality of installation plates, the installation plates are distributed along the axial direction of the installation column, and the side edges of the installation plates are fixedly connected with the installation column to form installation cavities between two adjacent installation plates; a plurality of outer cylinder bodies are detachably arranged in the installation cavities, and the outer cylinder bodies are provided with through cavities. The communication pipe can realize multi-line physical isolation, so that different cables are not wound with each other and maintenance is not interfered with each other.

Description

Technical Field

[0001] This invention belongs to the field of pipe technology, and specifically relates to a communication pipe and its preparation method. Background Technology

[0002] With the rapid development of urban communications, power, security, and fiber optic networks, the demand for buried cable protection pipes continues to increase. Currently, communication cable protection pipes generally suffer from the following technical problems: However, this type of pipe has obvious defects: 1. Traditional conduits are mostly single-hole structures, with different cables laid together. After long-term use, they become tangled and cross each other, making it easy to pull and damage other lines during maintenance.

[0003] 2. Ordinary PVC and PE pipes have poor longitudinal crack resistance. When buried underground, they are prone to longitudinal cracking due to settlement and compression, which can lead to mud and water seepage and moisture damage to cables.

[0004] 3. Conventional communication tubes have insufficient flame retardant properties, posing a safety hazard.

[0005] 4. Integral pipes cannot be disassembled into sections, resulting in high construction and maintenance costs.

[0006] 5. If a thin-walled structure is used, ordinary materials have insufficient rigidity and crack resistance, making them prone to deformation and breakage, and thus unable to meet the requirements for underground use.

[0007] Based on the above-mentioned shortcomings, the development of a new type of communication tubing that is thin-walled, high-strength, divisible, resistant to longitudinal breakage, flame-retardant, and easy to assemble has significant engineering value. Summary of the Invention

[0008] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a communication conduit and its manufacturing method, which can achieve physical isolation of multiple lines, so that different cables do not tangle with each other and maintenance does not interfere with each other.

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A communication conduit includes: a main support, comprising a mounting column and a plurality of mounting plates, wherein the plurality of mounting plates are distributed along the axial direction of the mounting column, and one side of each of the plurality of mounting plates is fixedly connected to the mounting column such that a mounting cavity is formed between two adjacent mounting plates; and a plurality of outer cylinders, wherein the outer cylinders are detachably disposed within the mounting cavity, and the outer cylinders are provided with through cavities.

[0010] In some embodiments of the present invention, a first connector is provided inside the mounting cavity, and a second connector is provided on the outer cylinder, wherein the first connector can be detachably snapped into the second connector.

[0011] In some embodiments of the present invention, the first connecting member is a retaining strip arranged axially along the mounting post, and the second connecting member is a retaining groove.

[0012] In some embodiments of the present invention, the outer cylinder includes a first straight edge and a second straight edge, and the second connecting member is disposed at the connection between the first straight edge and the second straight edge. When the outer cylinder is installed in the mounting cavity, the first straight edge and the second straight edge are respectively attached to two adjacent mounting plates.

[0013] In some embodiments of the present invention, the included angle between any two adjacent mounting plates is the same.

[0014] In some embodiments of the present invention, sealing ribs are provided on both sides of the end of the mounting plate away from the mounting post, and sealing grooves that cooperate with the sealing ribs are provided at the ends of the first straight edge and the second straight edge.

[0015] In some embodiments of the present invention, a limiting spacer is provided inside the cavity.

[0016] In some embodiments of the present invention, the number of outer cylinders is the same as the number of mounting plates, and the number of outer cylinders is ≥3.

[0017] In some embodiments of the present invention, the oxygen index of the communication pipe is ≥32% and the flame retardant rating is V-0.

[0018] In some embodiments of the present invention, both the main support and the outer cylinder are made of PVC-O material, which comprises the following raw materials in parts by weight: PVC O resin: 80-120 parts, flame retardant: 3.0-6.0 parts, crack-resistant modifier: 4.0-8.0 parts, heat stabilizer: 1.5-3.0 parts, processing aid: 0.8-2.0 parts.

[0019] In some embodiments of the present invention, the PVC O resin is a special PVC resin for biaxial orientation, with a K value of 60-70 and a degree of polymerization of 1000–1100.

[0020] In some embodiments of the present invention, the flame retardant is aluminum hydroxide with a particle size of 2-5 μm.

[0021] In some embodiments of the present invention, the crack-resistant modifier is chlorinated polyethylene with a chlorine content of 30%-40%.

[0022] In some embodiments of the present invention, the heat stabilizer is a calcium-zinc composite heat stabilizer.

[0023] In some embodiments of the present invention, the processing aid is acrylate processing aid AIM-80.

[0024] A method for preparing a communication pipe as described above includes the following steps: (1) mixing the raw materials and plasticizing them through a twin-screw extruder, and extruding them to obtain an outer cylinder and a main support; (2) installing the outer cylinder on the main support to obtain the pipe.

[0025] The beneficial effects of this invention are: (1) The communication conduit of the present invention is obtained by installing several outer cylinders on the main support. Different cables can be run through the cavity of different outer cylinders, so as to realize physical isolation, independent branching and non-interference of maintenance of multiple types of cables; (2) The outer cylinder of the communication pipe of the present invention is detachably snapped together by the slot and the snap strip on the main support. During assembly, it slides in and locks along the axis, and the splicing is tight and does not loosen, so that it can be assembled in sections on site. The wire threading and wire replacement do not require overall excavation, reducing the construction difficulty. (3) The outer cylinder of the communication pipe of the present invention is sealed by attaching the first straight edge and the second straight edge to the two adjacent mounting plates and cooperating with the sealing ribs and sealing grooves to effectively prevent groundwater and mud from seeping into the inside of the communication pipe and ensure the life of the internal cables. (4) The outer cylinder installation and main support assembly structure of the communication pipe of the present invention can effectively disperse stress, and at the same time, it is combined with specific PVC The O material significantly improves the longitudinal tensile and tear resistance of the pipe, making it less prone to cracking, especially in thin-walled (2.0mm) structures. (5) The communication pipe of the present invention relies on PVC. Due to the characteristics of O material, the pipe can be designed with thinner walls, which is lightweight, saves materials, and is convenient for transportation and installation. At the same time, its ring stiffness and structural stability are better than ordinary thick-walled PVC pipes. (6) The communication pipe of the present invention has an oxygen index of ≥32% and a flame retardant rating of V-0. It can achieve self-extinguishing upon removal of flame, with no dripping and low smoke, and is suitable for use in underground integrated pipe corridors. Attached Figure Description

[0026] Figure 1 This is one of the schematic diagrams of the communication pipe in Embodiment 1 of the present invention, wherein the outer cylinder and the main support are in a disassembled state; Figure 2 This is a second schematic diagram of the communication pipe according to Embodiment 1 of the present invention, wherein the outer cylinder and the main support are in an assembled state; Figure 3 This is a cross-sectional schematic diagram of the communication pipe according to Embodiment 1 of the present invention; Figure 4This is one of the schematic diagrams of the communication pipe in Embodiment 3 of the present invention, wherein the outer cylinder and the main support are in a disassembled state; Figure 5 This is a second schematic diagram of the communication pipe of Embodiment 3 of the present invention, wherein the outer cylinder and the main support are in an assembled state; Figure 6 This is a cross-sectional schematic diagram of the communication pipe according to Embodiment 3 of the present invention.

[0027] Figure label: 100. Main bracket; 101. Mounting column; 102. Mounting plate; 103. First connector; 104. Sealing rib; 200. Outer cylinder; 201. Through cavity; 202. Second connecting piece; 203. First straight edge; 204. Second straight edge; 205. Sealing groove; 206. Limiting partition. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments.

[0029] Example 1: A type of communication tubing, such as Figure 1-2 As shown, the system includes a main support 100 and three outer cylinders 200. The main support 100 includes a mounting column 101 and three mounting plates 102. The three mounting plates 102 are evenly distributed along the axial direction of the mounting column 101 such that the included angle between any two adjacent mounting plates 102 is the same. One side of each of the three mounting plates 102 is fixedly connected to the mounting column 101, forming three mounting cavities between two adjacent mounting plates 102. The three outer cylinders 200 are detachably installed in the three mounting cavities, and each outer cylinder 200 has a through cavity 201.

[0030] The communication conduit consists of three outer cylinders 200 that can be detachably installed on the main support 100. Different cables can be run through the cavities 201 of different outer cylinders 200, which can achieve physical isolation, independent branching, and non-interference in maintenance of multiple types of cables.

[0031] Furthermore, a first connector 103 is provided inside the installation cavity, and a second connector 202 is provided on the outer cylinder 200. The first connector 103 can be detachably snapped into the second connector 202.

[0032] The first connector 103 and the second connector 202 can be detachably snapped together, so that they can be assembled in sections on site. Threading and changing wires do not require overall excavation, reducing the difficulty of construction.

[0033] Furthermore, the first connector 103 is a retaining strip arranged along the axial direction of the mounting post 101, and the second connector 202 is a retaining groove.

[0034] The detachable snap-fit ​​is achieved by engaging the slot with the snap-fit ​​strip on the main bracket 100. During assembly, it slides in axially and locks in place, ensuring a tight and secure fit.

[0035] Furthermore, the cross-section of the card slot is circular with an opening on one side, and the head of the card strip is T-shaped, which can cooperate with the card slot to lock it in place.

[0036] While ensuring that the clip is firmly engaged with the slot, the clip can only slide in or out from both ends of the slot, thus enabling the clip to be installed or disassembled.

[0037] Furthermore, the outer cylinder 200 includes a first straight edge 203 and a second straight edge 204, and the second connector 202 is disposed at the connection between the first straight edge 203 and the second straight edge 204. When the outer cylinder 200 is installed in the mounting cavity, the first straight edge 203 and the second straight edge 204 are respectively attached to two adjacent mounting plates 102.

[0038] By having the first straight edge 203 and the second straight edge 204 respectively attached to the two adjacent mounting plates 102, the gap between the outer cylinder 200 and the mounting plate 102 can be reduced.

[0039] Furthermore, sealing ribs 104 are provided on both sides of the end of the mounting plate 102 away from the mounting post 101, and sealing grooves 205 that cooperate with the sealing ribs 104 are provided at the ends of the first straight edge 203 and the second straight edge 204; a limiting partition 206 is provided in the through cavity 201.

[0040] The sealing rib 104 and the sealing groove 205 achieve a seal, and together with the first straight edge 203 and the second straight edge 204, they are respectively attached to the two adjacent mounting plates 102, which can effectively prevent groundwater and mud from seeping into the inside of the communication pipe and ensure the life of the internal cables.

[0041] Furthermore, such as Figure 3 As shown, the edge on the outer wall of the outer cylinder 200 that connects to the first straight edge 203 and the second straight edge 204 is an arc-shaped edge, making the cross-section of the communication pipe circular.

[0042] Furthermore, both the main support 100 and the outer cylinder 200 in this communication conduit are made of PVC-O material, which comprises the following raw materials in parts by weight: PVC O-resin: 100 parts, halogen-free flame retardant: 5.0 parts, longitudinal cracking modifier: 6.0 parts, calcium-zinc composite heat stabilizer: 2.0 parts, processing aid: 1.2 parts, antioxidant: 0.3 parts, lubricant: 0.5 parts, UV stabilizer: 0.2 parts, of which PVC O resin is a biaxially oriented PVC resin with a K value of 65 and a degree of polymerization of 1050. The flame retardant is aluminum hydroxide with a particle size of 2-5μm. The crack-resistant modifier is chlorinated polyethylene with a chlorine content of 35%. The processing aid is acrylate processing aid AIM-80. The lubricant is a mixture of stearic acid and PE wax in a weight ratio of 1:1. The UV protectant is UV 531.

[0043] The method for preparing the communication conduit as described above includes the following steps: (1) Mix the raw materials according to the proportion, mix at high speed to 110°C, and then cold mix to below 40°C; (2) After being plasticized by a twin-screw extruder at a plasticizing temperature of 180°C, an outer cylinder 200 and a main support 100 are extruded. The wall thickness of the outer cylinder 200 is 2.0 mm. The mounting column 101, mounting plate 102, first connector 103 and sealing rib 104 are formed during the extrusion of the main support 100. The through cavity 201, second connector 202, first straight edge 203, second straight edge 204, sealing groove 205 and limiting partition 206 are formed during the extrusion of the outer cylinder 200. (3) After cutting and inspecting the outer cylinder 200 and the main support 100, the outer cylinder 200 is installed on the main support 100.

[0044] When using this communication conduit, first separate the three outer cylinders 200 from the main support 100, and then thread different cables through the through cavities 201 of the three different outer cylinders 200. Then, snap them together with the first connector 103 and the second connector 202. At the same time, the first straight edge 203 and the second straight edge 204 of the outer cylinder 200 respectively attach to the two adjacent mounting plates 102 of the main support 100, and the sealing rib 104 cooperates with the sealing groove 205 to seal. In this way, the three outer cylinders 200 are installed on the main support 100 to form a communication conduit, which allows different cables to be laid separately without tangling or interfering with each other. They can be assembled in sections on site, and there is no need to dig the whole structure for threading and replacing cables, reducing the difficulty of construction.

[0045] Example 2: A communication pipe material differs from Example 1 only in that the longitudinal cracking modifier is adjusted to 8.0 parts and the halogen-free flame retardant to 4.0 parts in the formula. The structure and preparation method of the communication pipe material are exactly the same as those of Example 1.

[0046] Example 3: A type of communication tubing, such as Figure 4-6 As shown, the only difference from Example 1 is that the edge connecting the outer wall of the outer cylinder 200 to the first straight edge 203 and the second straight edge 204 is a straight edge, making the cross-section of the communication pipe triangular. The formula and preparation method of the communication pipe are exactly the same as those in Example 1.

[0047] Test Example: The performance of the communication pipes in Examples 1-3 was compared with that of ordinary PVC-U communication pipes of the same diameter. The wall thickness of the ordinary PVC-U communication pipe is 3.5mm. The results are shown in Table 1 below: Table 1. Performance Test Results

[0048] As shown in Table 1, the longitudinal cracking load of the communication pipe of the present invention can reach more than 1900N, the ring stiffness can reach more than 19 kN / m², and no leakage occurs during the sealing test (0.2MPa water pressure holding for 30min), demonstrating excellent mechanical properties. The oxygen index of the communication pipe of the present invention is above 32%, and the flame retardant rating is V-0, demonstrating excellent flame retardant performance.

[0049] The comparison shows that the mechanical properties and flame retardant properties of the communication pipe of the present invention are superior to those of ordinary PVC-U communication pipes.

[0050] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A communication conduit, characterized in that: include: The main support (100) includes a mounting column (101) and a plurality of mounting plates (102). The plurality of mounting plates (102) are distributed along the axial direction of the mounting column (101). One side of each of the plurality of mounting plates (102) is fixedly connected to the mounting column (101) so that a mounting cavity is formed between two adjacent mounting plates (102). A plurality of outer cylinders (200) are provided, wherein the outer cylinders (200) are detachably disposed in the mounting cavity, and the outer cylinders (200) are provided with through cavities (201).

2. The communication conduit according to claim 1, characterized in that: The mounting cavity is provided with a first connector (103), and the outer cylinder (200) is provided with a second connector (202). The first connector (103) can be detachably snapped into the second connector (202).

3. A communication conduit according to claim 2, characterized in that: The first connector (103) is a retaining strip arranged along the axial direction of the mounting post (101), and the second connector (202) is a retaining groove.

4. A communication conduit according to claim 3, characterized in that: The outer cylinder (200) includes a first straight edge (203) and a second straight edge (204). The second connector (202) is disposed at the connection between the first straight edge (203) and the second straight edge (204). When the outer cylinder (200) is installed in the mounting cavity, the first straight edge (203) and the second straight edge (204) are respectively attached to two adjacent mounting plates (102).

5. A communication conduit according to claim 4, characterized in that: The mounting plate (102) is provided with sealing ribs (104) on both sides of the end furthest from the mounting post (101), and the ends of the first straight edge (203) and the second straight edge (204) are provided with sealing grooves (205) that cooperate with the sealing ribs (104).

6. A communication conduit according to claim 1, characterized in that: A limiting spacer (206) is provided inside the cavity (201).

7. A communication conduit according to claim 1, characterized in that: The number of outer cylinders (200) is the same as the number of mounting plates (102), and the number of outer cylinders (200) is ≥3.

8. A communication conduit according to claim 1, characterized in that: The oxygen index of the communication pipe is ≥32%, and the flame retardant rating is V-0.

9. A communication conduit according to any one of claims 1-8, characterized in that: Both the main support (100) and the outer cylinder (200) are made of PVC-O material, which comprises the following raw materials in parts by weight: PVC O resin: 80-120 parts, flame retardant: 3.0-6.0 parts, crack-resistant modifier: 4.0-8.0 parts, heat stabilizer: 1.5-3.0 parts, processing aid: 0.8-2.0 parts.

10. A method for preparing a communication conduit as described in claim 9, characterized in that: Includes the following steps: (1) After mixing the raw materials, they are plasticized by a twin-screw extruder and extruded to obtain the outer cylinder and the main support. (2) The outer cylinder is installed on the main support.

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