A pipe material and preparation method used in a PVC-U modular siphon drainage system

Abstract

The present invention belongs to the technical field of drainage systems, and specifically relates to a pipe material and a preparation method used in a PVC-U modular siphon drainage system, comprising a plurality of pipe body sections, wherein expansion joints are arranged between the pipe bodies, and a riser inspection assembly is arranged on the pipe body; the expansion joints include an expansion joint base and an expansion joint socket, and the riser inspection assembly includes a riser inspection port body and a riser inspection port cover. The present invention adjusts the formula of the pipe body, arranges expansion joints between the pipe bodies, and arranges a riser inspection assembly on the pipe body, so that the disclosed drainage system has high impact resistance, high internal pressure resistance, and good weather resistance, and the drainage system is safe and reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of drainage systems, and in particular relates to a pipe material used in a PVC-U modular siphon drainage system and a preparation method thereof. Background Art

[0002] At present, PVC-U plastic pipes are commonly used in building rainwater drainage systems. However, due to the negative pressure in the siphon drainage system, when used in high-rise buildings, there are high requirements for the pressure-bearing capacity of pipes and accessories. Conventional PVC-U rainwater pipes and connecting accessories have insufficient pressure-bearing capacity and are prone to collapse and rupture when fully filled.

[0003] In addition, most of the expansion joint structures on the market have threads between the expansion joint cover and the expansion joint body. This structure applies pressure to the pressure ring after tightening the expansion joint cover, so that the rubber ring is close to the pipe to achieve a sealing effect. However, the internal pressure resistance of this structure is limited and can usually only withstand an internal pressure of about 0.1Mpa. During actual installation, construction personnel need to loosen the expansion joint cover first, measure the depth of the expansion joint (there are large differences in the depth of expansion joints among manufacturers on the market), mark the expansion margin on the pipe, insert the pipe into the expansion joint according to the mark, and use a wrench tool to tighten the expansion joint cover. If the tightening force is insufficient, the sealing ring and the pipe will not fit well enough, which is prone to leakage and seepage.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a PVC-U modular siphon drainage system and a preparation method thereof.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A pipe used in a PVC-U modular siphon drainage system comprises a plurality of pipe bodies, expansion joints are arranged between the pipe bodies, and a riser inspection assembly is arranged on the pipe body; the expansion joint comprises an expansion joint base and an expansion joint socket, and the riser inspection assembly comprises a riser inspection port body and a riser inspection port cover.

[0007] A telescopic joint sealing ring is arranged between the telescopic joint socket and the telescopic joint base.

[0008] The side of the expansion joint sealing ring close to the expansion joint socket adopts a sawtooth structure, and the side of the expansion joint sealing ring close to the expansion joint base adopts a U-shaped protrusion structure.

[0009] A standpipe inspection port rubber ring is arranged between the standpipe inspection port body and the standpipe inspection port cover.

[0010] The standpipe inspection port cover adopts a standpipe inspection port cover with a concave structure.

[0011] The pipe body is also provided with a full-plastic siphon rainwater bucket, a bend pipe assembly and an external pipe; the bend pipe assembly includes two 45° bend pipes.

[0012] The number of the telescopic joints is set to be several.

[0013] A method for preparing a pipe used in a PVC-U modular siphon drainage system, characterized in that it comprises the following steps: (1) Prepare materials The formula of the pipe body includes the following components: PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive; (2) Preparation of mixed ingredients Weigh PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive according to the proportion, add them into a high-speed mixer, mix at high speed to 110° C., and then cool and discharge the material to obtain a mixed material; (3) Extrusion molding The mixed material obtained in step (2) is extruded by a PVC extruder. The extruder molding temperature is as follows: barrel heating stage 1 is 180°C, barrel heating stage 2 is 195°C, barrel heating stage 3 is 175°C, barrel heating stage 4 is 175°C, confluence core is heated to 170°C, die head heating stage 1 is 175°C, die head heating stage 2 is 180°C, die head heating stage 3 is 185°C, and die head heating stage 4 is 210°C.

[0014] The proportions of the components in step (1) are as follows: 50 parts of PVC resin, 3-5 parts of calcium zinc stabilizer, 0.2-0.3 parts of lubricant, 1.5-2.5 parts of light calcium, 0.5-0.7 parts of titanium dioxide, 1-3 parts of chlorinated polyethylene, and 1-3 parts of impact-resistant additive.

[0015] The beneficial effects of the present invention are as follows: (1) The present application adjusts the formula of the pipe body, sets expansion joints between the pipe bodies, and sets a riser inspection assembly on the pipe body, so that the disclosed drainage system has high impact resistance, high internal pressure resistance and good weather resistance, and the drainage system is safe and reliable; (2) This application only requires applying glue to the socket of the expansion joint socket assembly and the expansion joint base, and then assembling it to the pipe body to complete the installation. Compared with the traditional expansion joint that requires disassembling and assembling the expansion joint cover and manually adjusting the expansion margin, it is more convenient and quicker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the PVC-U modular siphon drainage system of the present invention; Figure 2 It is a structural schematic diagram of the expansion joint in the present invention; Figure 3 for Figure 2 Schematic diagram of the structure of part A; Figure 4 It is a structural schematic diagram of the standpipe inspection assembly of the present invention; The numbers include: 1. All-plastic siphon rain gutter; 2. 45° elbow; 3. Pipe body; 4. External pipe; 5. Expansion joint; 6. Riser inspection assembly; 7. Expansion joint socket; 8. Expansion joint sealing ring; 9. Expansion joint base; 10. Riser inspection port body; 11. Riser inspection port cover; 12. Riser inspection port rubber ring; 13. Sawtooth structure; 14. U-shaped raised structure. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific implementation methods.

[0018] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solution provided by the present invention.

[0019] like Figure 1-Figure 4 As shown, a pipe used in a PVC-U modular siphon drainage system includes several sections of pipe bodies 3, expansion joints 5 are arranged between the pipe bodies 3 to avoid the excess of plastic expansion and contraction, and a riser inspection component 6 is arranged on the pipe body 3 to prevent pipeline blockage; the expansion joint 5 includes an expansion joint base 9 and an expansion joint socket 7, and the riser inspection component 6 includes a riser inspection port body 10 and a riser inspection port cover 11.

[0020] A telescopic joint sealing ring 8 is provided between the telescopic joint socket 7 and the telescopic joint base 9. The telescopic joint sealing ring 8 has a sawtooth structure 13 (3-5 sawtooths can be provided) on the side close to the telescopic joint socket 7, and a U-shaped protrusion structure 14 (multiple U-shaped protrusions can be provided) on the side close to the telescopic joint base 9 to achieve a high pressure-bearing sealing effect. A riser inspection port rubber ring 12 is provided between the riser inspection port body 10 and the riser inspection port cover 11. The riser inspection port cover 11 has a concave structure. Such a setting has a high strength to withstand the negative pressure in the full filling state.

[0021] The pipe body 3 is also provided with a full-plastic siphon rainwater gutter 1, a bent pipe assembly and an external pipe 4. The pipe body 3, the full-plastic siphon rainwater gutter 1, the bent pipe assembly, the external pipe 4, the expansion joint 5 and the riser inspection assembly 6 constitute a PVC-U modular siphon drainage system; the bent pipe assembly includes two 45° bent pipes 2, and the number of expansion joints 5 is set to be several, and a corresponding number of expansion joints 5 can be set according to construction requirements.

[0022] A method for preparing a pipe used in a PVC-U modular siphon drainage system comprises the following steps: (1) Prepare materials The formula of the pipe body 3 includes the following components: PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive; The proportions of the components are as follows: 50 parts of PVC resin, 3-5 parts of calcium zinc stabilizer, 0.2-0.3 parts of lubricant, 1.5-2.5 parts of light calcium, 0.5-0.7 parts of titanium dioxide, 1-3 parts of chlorinated polyethylene, and 1-3 parts of impact-resistant additive; (2) Preparation of mixed ingredients Weigh PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive according to the proportion, add them into a high-speed mixer, mix at high speed to 110° C., and then cool and discharge the material to obtain a mixed material; (3) Extrusion molding The mixed material obtained in step (2) is extruded by a PVC extruder, and the extruder molding temperature is as follows: barrel heating stage 180°C, barrel heating stage 2 195°C, barrel heating stage 3 175°C, barrel heating stage 4 175°C, confluence core heating 170°C, die heating stage 1 175°C, die heating stage 2 180°C, die heating stage 3 185°C, die heating stage 4 210°C. Thus, a reinforced rainwater pipe with high impact resistance, high internal pressure resistance and high weather resistance is obtained.

[0023] Finally, the performance test was carried out and the following results were obtained: density 1430kg / m3, Vicat softening temperature 84.25℃, tensile strength 45.19Mpa, elongation at break 169%, longitudinal recovery rate 1.24%, impact resistance TIR <10%. The test pressure was 1.5Mpa at 20℃, and no leakage or rupture occurred within 1 hour. Weather resistance: tensile strength retention rate 98%, color change level 3.

[0024] The top of the PVC-U modular siphon drainage system disclosed in the present application is a full plastic siphon rainwater bucket 1, and then the pipe body 3 is connected with the external pipe 4 and the 45° elbow 2. Due to thermal expansion and contraction, telescopic joints should be set in the system, and the telescopic margin should be reserved. The corresponding number of telescopic joints 5 should be set according to the construction requirements. At the same time, a riser inspection component 6 should be set on the pipe body 3 according to the construction requirements.

[0025] Specifically, the telescopic joint 5 disclosed in the present application has a 20mm telescopic margin reserved before leaving the factory, that is, the overall assembly between the telescopic joint socket 7, the telescopic joint base 9 and the telescopic joint sealing ring 8 has been completed before leaving the factory, and a 20mm telescopic margin is reserved between the telescopic joint socket 7 and the telescopic joint base 9. At the construction site, it is only necessary to apply glue to the sockets of the telescopic joint socket 7 and the telescopic joint base 9, and then assemble them on the pipe body 3 to complete the installation. Compared with the traditional telescopic joint that needs to disassemble and assemble the telescopic joint cover and manually adjust the telescopic margin, it saves a lot of time and is more convenient and quick.

[0026] In addition, by arranging the expansion joint 5, the riser inspection assembly 6, the external pipe 4 and the elbow assembly, the disclosed drainage system has high impact resistance, high internal pressure resistance and good weather resistance. The drainage system is safe and reliable and meets all the requirements of the circular reinforced pipes and fittings in the standard QB / T2480.

[0027] The above content is a further detailed description of the technical solution provided in combination with the preferred implementation methods of this patent. It cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which this patent belongs, without departing from the concept of this patent, they can also make several simple deductions or substitutions, which should be deemed to fall within the scope of protection of this patent.

Claims

1. A pipe used in a PVC-U modular siphon drainage system, characterized in that: It comprises several sections of pipe bodies, expansion joints are arranged between the pipe bodies, and a riser inspection assembly is arranged on the pipe body; the expansion joint comprises an expansion joint base and an expansion joint socket, and the riser inspection assembly comprises a riser inspection port body and a riser inspection port cover.

2. The pipe material used in the PVC-U modular siphon drainage system according to claim 1, characterized in that: A telescopic joint sealing ring is arranged between the telescopic joint socket and the telescopic joint base.

3. The pipe material used in the PVC-U modular siphon drainage system according to claim 1, characterized in that: The side of the expansion joint sealing ring close to the expansion joint socket adopts a sawtooth structure, and the side of the expansion joint sealing ring close to the expansion joint base adopts a U-shaped protrusion structure.

4. The pipe material used in the PVC-U modular siphon drainage system according to claim 1, characterized in that: A standpipe inspection port rubber ring is arranged between the standpipe inspection port body and the standpipe inspection port cover.

5. The PVC-U modular siphon drainage system according to claim 1, characterized in that: The standpipe inspection port cover is a standpipe inspection port cover with a concave structure.

6. The pipe material used in the PVC-U modular siphon drainage system according to claim 1, characterized in that: The pipe body is also provided with a full plastic siphon rainwater gutter, a bend pipe assembly and an external pipe; the bend pipe assembly includes two 45° bend pipes.

7. The pipe used in the PVC-U modular siphon drainage system according to claim 1, characterized in that: The number of the telescopic joints is set to be several.

8. A method for preparing a pipe used in a PVC-U modular siphon drainage system as claimed in claim 1, characterized in that: The following steps are involved: (1) Prepare materials The formula of the pipe body includes the following components: PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive; (2) Preparation of mixed ingredients Weigh PVC resin, calcium zinc stabilizer, lubricant, light calcium, titanium dioxide, chlorinated polyethylene and impact-resistant additive according to the proportion, add them into a high-speed mixer, mix at high speed to 110° C., and then cool and discharge the material to obtain a mixed material; (3) Extrusion molding The mixed material obtained in step (2) is extruded by a PVC extruder. The extruder molding temperature is as follows: barrel heating stage 1 is 180°C, barrel heating stage 2 is 195°C, barrel heating stage 3 is 175°C, barrel heating stage 4 is 175°C, confluence core is heated to 170°C, die head heating stage 1 is 175°C, die head heating stage 2 is 180°C, die head heating stage 3 is 185°C, and die head heating stage 4 is 210°C.

9. The method for preparing a PVC-U modular siphon drainage system according to claim 8, characterized in that: The proportions of the components in step (1) are as follows: 50 parts of PVC resin, 3-5 parts of calcium zinc stabilizer, 0.2-0.3 parts of lubricant, 1.5-2.5 parts of light calcium, 0.5-0.7 parts of titanium dioxide, 1-3 parts of chlorinated polyethylene, and 1-3 parts of impact-resistant additive.

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