CN215928665U

CN215928665U - Forming system of pressure-bearing prefabricated sealing ring double-wall corrugated pipe

Info

Publication number: CN215928665U
Application number: CN202120052607.XU
Authority: CN
Inventors: 张双全; 陈定平; 吴少明; 郝洪波; 王贝贝
Original assignee: Kangtai Plastic Science and Technology Group Co Ltd
Current assignee: Kangtai Plastic Technology Co ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2022-03-01
Anticipated expiration: 2031-01-08

Abstract

The utility model provides a forming system of a pressure-bearing prefabricated sealing ring double-wall corrugated pipe, which comprises an extruder, a forming module, a tractor and a single chip microcomputer controller, wherein the forming module is respectively provided with a first limiting device and a second limiting device, the signal output end of the first limiting device is connected with the first signal input end of the single chip microcomputer controller, the signal output end of the second limiting device is connected with the second signal input end of the single chip microcomputer controller, the first signal output end of the single chip microcomputer controller is connected with the signal input end of the extruder, and the second signal output end of the single chip microcomputer controller is connected with the signal input end of the tractor; the pressure-bearing prefabricated sealing ring double-wall corrugated pipe manufactured by the forming system provided by the utility model has the advantages that the prefabricated sealing ring is arranged in the double-wall corrugated pipe in a mode of processing a pipe body which is in a solid wall and sawing off at the pipe production stage and then prefabricating the sealing ring, so that the problem that the joint of the corrugated pipe is easy to leak can be effectively avoided.

Description

Forming system of pressure-bearing prefabricated sealing ring double-wall corrugated pipe

Technical Field

The utility model relates to the technical field of corrugated pipes, in particular to a forming system of a pressure-bearing prefabricated sealing ring double-wall corrugated pipe.

Background

The existing corrugated pipe comprises an integrally formed corrugated pipe and a winding formed corrugated pipe, wherein the integrally formed corrugated pipe comprises a PVC corrugated pipe, a PE corrugated pipe, a PP-UH corrugated pipe and the like, the winding formed corrugated pipe comprises a steel strip winding reinforced corrugated pipe, the PE winding corrugated pipe, a reinforced winding corrugated pipe and the like, but the bell mouths of the corrugated pipes are connected in the wave grooves of the socket corrugated pipe by adopting sealing rings, for the large-diameter corrugated pipe, the sealing rings are very difficult to install, if the large-diameter corrugated pipe is not installed, the leakage is easy, the installation efficiency is low, and the drop of the sealing ring pipeline installed in the wave grooves exceeds more than 20 meters, so that the interface is easy to leak. Although the PVC-UH water supply and drainage pipe is a prefabricated sealing ring, the pipe is easy to produce, is a solid-wall pipe, is easy to manufacture, but the double-wall corrugated pipe does not have the prefabricated sealing ring. According to the technical expert analysis of 100 municipal sewage projects 2020 in 2020, 85% of sewage leaks in different degrees, at present, the country implements ground defense war, environmental management and environmental protection, various kinds of sewage are not allowed to leak, a socket is the weakest link in the actual project and is most easily damaged, and the socket deforms when the foundation subsides, so that the environment is often damaged by leakage.

Content of application

The utility model aims to provide a pressure-bearing prefabricated sealing ring double-wall corrugated pipe, and a forming system and a forming method matched with the pressure-bearing prefabricated sealing ring double-wall corrugated pipe, so as to solve the defects in the prior art.

The embodiment of the utility model is realized by the following technical scheme:

the utility model provides a pressure-bearing prefabricated sealing ring double-wall corrugated pipe which comprises a pipe body, wherein one end of the pipe body is provided with a socket, the wall thickness of the socket is greater than that of the pipe body, the other end of the pipe body is provided with a socket, the wall thickness of the socket is greater than that of the pipe body, and a sealing ring is arranged on the inner side wall of the socket.

Further, the wall thickness of the socket is greater than the wall thickness of the tube body.

Furthermore, an annular groove is formed in the inner side wall of the socket, and the sealing ring is embedded in the annular groove.

Furthermore, the sealing ring comprises an annular steel skeleton and a rubber layer coated outside the steel skeleton.

Further, the pipe body includes an outer layer and an inner layer, the outer layer is corrugated.

Furthermore, a plurality of cavities are arranged between the outer layer and the inner layer.

Further, the cross section of the cavity is rectangular.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

according to the pressure-bearing prefabricated sealing ring double-wall corrugated pipe provided by the utility model, the prefabricated sealing ring is arranged in the double-wall corrugated pipe in a manner of processing a pipe body which is in a solid wall and sawing off and then prefabricating the sealing ring in the pipe production stage, so that the pipe is fast and convenient to assemble, and the problem of easy leakage at the corrugated pipe joint can be effectively avoided by the prefabricated sealing ring. The pressure-bearing prefabricated sealing ring double-wall corrugated pipe provided by the utility model can be made into a single-color corrugated pipe with the same color of the inner layer and the outer layer, and can also be made into a double-color corrugated pipe with the different colors of the inner layer and the outer layer.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a pressure-bearing prefabricated sealing ring double-wall corrugated pipe provided by an embodiment of the utility model;

FIG. 2 is a schematic diagram of the construction of one end of the pressure-bearing prefabricated seal ring double-walled corrugated pipe shown in FIG. 1 with a bell mouth;

FIG. 3 is a schematic diagram of the construction of the end of the pressure-bearing prefabricated sealing ring double-wall corrugated pipe shown in FIG. 1 with a spigot;

fig. 4 is a schematic structural diagram of a molding module according to an embodiment of the present invention.

Icon: 1-a pipe body, 11-an outer layer, 12-an inner layer, 13-a socket, 14-a socket, 141-an annular groove, 2-a sealing ring, 3-a forming module, 31-a first limiting device and 32-a second limiting device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, in a first aspect, the present embodiment provides a pressure-bearing prefabricated sealing ring double-wall corrugated pipe, including a pipe body 1, where the pipe body 1 includes an outer layer 11 and an inner layer 12, the outer layer 11 is corrugated, a plurality of cavities with rectangular cross-sections are disposed between the outer layer 11 and the inner layer 12, a socket 13 is disposed at one end of the pipe body 1, the wall thickness of the socket 13 is greater than the overlapping wall thickness of the inner layer 12 and the outer layer 11 of the pipe body 1, a socket 14 is disposed at the other end of the pipe body 1, the wall thickness of the socket 14 is greater than the overlapping wall thickness of the inner layer 12 and the outer layer 11 of the pipe body 1, so as to facilitate subsequent prefabricated sealing ring 2, a sealing ring 2 is disposed on the inner side wall of the socket 14, an annular groove 141 is disposed on the inner side wall of the socket 14, the sealing ring 2 is embedded in the annular groove 141, the sealing ring 2 includes an annular steel skeleton and a rubber layer covering the outside of the steel skeleton, so that the sealing ring cannot be taken out under non-destructive conditions.

The outer raw materials of body include: 50-150 parts of polyvinyl chloride resin; 50-150 parts of polyethylene resin; 10-30 parts of a nano material; 2-20 parts of lead-free stabilizer; 1-20 parts of a processing aid; 1-5 parts of lubricant, 0.5-5 parts of antioxidant, 0.5-2 parts of light stabilizer, 1-25 parts of compatibilizer, 1-15 parts of impact modifier, 1-15 parts of reinforcing agent and 0.5-10 parts of coupling agent; 0.01-5 parts of first pigment.

The raw materials of the inner layer of body include: 50-150 parts of polyvinyl chloride resin; 50-150 parts of polyethylene resin; 10-30 parts of a nano material; 2-20 parts of lead-free stabilizer; 1-20 parts of a processing aid; 1-5 parts of lubricant, 0.5-5 parts of antioxidant, 0.5-2 parts of light stabilizer, 1-25 parts of compatibilizer, 1-15 parts of impact modifier, 1-15 parts of reinforcing agent and 0.5-10 parts of coupling agent; 0.01-5 parts of a second pigment.

Wherein the polyethylene resin has a density of 0.930-0.965g/cm³The melt index (190 ℃/5.0kg) is less than or equal to 0.5g/10min, the yield strength is greater than or equal to 24MPa, the elongation at break is greater than or equal to 350 percent, and the oxidation induction time (200 ℃) is greater than 30 min.

Wherein the apparent density of the polyvinyl chloride resistant resin is more than or equal to 0.45g/cm³The viscosity number is 90-100ml/g, the whiteness (after 10min at 160 ℃) is more than or equal to 74%, the thermal stabilization time is not less than 4 minutes, the residual VCM is less than or equal to 1.0mg/kg, the absorption capacity of 100g resin plasticizer is more than or equal to 19g, the polymerization degree is 700-900, and the K value is 55-60.

Wherein, the nano material is one or more combination of nano inorganic materials after activation treatment, such as: one or the combination of more than two of wollastonite, calcium carbonate, talcum powder, mica, barium sulfate and titanium dioxide.

Among them, the stabilizer is a lead-free stabilizer, such as: calcium zinc stabilizer, organic tin stabilizer and rare earth stabilizer.

Wherein the light stabilizer is one or more of benzophenone, potassium benzoate, benzotriazole, salicylate, nickel dithiocarbamate, thiobisphenol, nickel phosphate monoester, hindered amine, zinc oxide and iron oxide.

Wherein the processing aid is one or more of acrylate high molecular copolymer, diisooctyl phthalate or polyethylene graft chloride.

The compatibilizer is one or a mixture of more than two of ethylene-vinyl acetate copolymer, glycidyl methacrylate radiation graft, styrene-maleic anhydride copolymer, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene graft, polypropylene-caprolactone graft copolymer, polypropylene-styrene graft copolymer, maleic anhydride graft copolymer, macromolecular silane coupling agent, macromolecular aluminum-titanium coupling agent, macromolecular titanate coupling agent, polypropylene-methacrylate graft copolymer, polypropylene-acrylonitrile graft copolymer, chloromethyl styrene graft copolymer, acrylic epoxy ester graft copolymer, chlorinated polyethylene and maleic anhydride graft copolymer.

Wherein the lubricant is one or more of stearic acid, paraffin, polyethylene wax, oxidized polyethylene wax, silicone oil, white oil, stearic acid amide, etc.

Wherein the impact modifier is one or the combination of more than two of chlorinated polyethylene, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer, methacrylate-butadiene-styrene copolymer, acrylic resin, polymethyl methacrylate resin, butadiene-acrylonitrile rubber and styrene butadiene rubber.

Wherein the reinforcing agent is one or the combination of two of graphene, white carbon black, glass fiber, asbestos, carbon fiber, boron fiber, aramid fiber, stainless steel fiber, whisker and the like.

Wherein the coupling agent is one or the combination of more than two of titanate coupling agent, aluminate coupling agent, aluminum-titanium coupling agent and silane coupling agent.

Wherein the first pigment comprises: titanium dioxide, carbon black, ultramarine blue, red pigment, violet pigment, yellow pigment, gray pigment, brown pigment, coffee pigment.

Wherein the second pigment comprises: titanium dioxide, carbon black, ultramarine blue, red pigment, violet pigment, yellow pigment, gray pigment, brown pigment, coffee pigment.

The specific types of the first pigment and the second pigment are respectively selected according to requirements, so that the inner layer and the outer layer of the pipe body are the same in color or different in color, the inner layer and the outer layer can be made into different colors, and the same color can be made into the same color.

As shown in fig. 4, a second aspect of the present embodiment provides a molding system for producing the above-mentioned pressure-bearing prefabricated sealing ring double-wall corrugated pipe, the molding system includes an extruder, a molding module 3, a tractor and a single-chip microcomputer controller, a first limiting device 31 and a second limiting device 32 are respectively disposed on the molding module 3, a signal output end of the first limiting device 31 is connected with a first signal input end of the single-chip microcomputer controller, a signal output end of the second limiting device 32 is connected with a second signal input end of the single-chip microcomputer controller, a first signal output end of the single-chip microcomputer controller is connected with a signal input end of the extruder, and a second signal output end of the single-chip microcomputer controller is connected with a signal input end of the tractor.

The extruder is of a double-layer structure and comprises an outer layer host and an inner layer host, the outer layer host comprises an outer feeding hopper and an outer discharging port, the inner layer host comprises an inner feeding hopper and an inner discharging port, and an inner gas outlet is formed in one side, away from the outer discharging port, of the inner discharging port.

A third aspect of the present invention provides a molding method for a molding system, which is used to produce the pressure-bearing prefabricated sealing ring double-wall corrugated pipe, and includes a pre-processing stage, two stages performed alternately, and a post-processing stage:

pretreatment stage and raw material preparation

(1) Weighing high-density polyethylene resin, a coupling agent (50% of the total parts), a compatibilizer (50% of the total parts) and a reinforcing agent according to the parts by weight, adding the materials into a high-speed stirrer, stirring for 5-20 minutes until the temperature reaches 60-100 ℃, discharging the materials into a cooler, cooling to 30-38 ℃, and then granulating and bagging the materials for the next procedure.

(2) Weighing polyvinyl chloride resin, a stabilizer, a pigment, a processing modifier, a coupling agent (the 50 percent of the rest in the previous procedure), an antioxidant, a light stabilizer, a compatibilizer (the 50 percent of the rest in the previous procedure) and an impact modifier according to parts by weight, heating the materials in a high-speed stirrer, stirring the materials by 7 to 30 parts, discharging the materials into a cooling stirrer after the temperature reaches 110 to 135 ℃, cooling the materials to 30 to 43 ℃, and bagging the materials for the next procedure.

(3) And (3) adding the weight of each pot of materials in the steps (1) and (2) together, stirring in a stirrer for 5-15 minutes, discharging into a cooler when the temperature reaches 60-80 ℃, cooling to 32-38 ℃, and bagging for use of an extrusion corrugated pipe.

In the first stage, the corrugated pipe body is processed

The first limiting device is closed, the second limiting device is activated, the second limiting device sends signals to the single chip microcomputer controller, the single chip microcomputer controller sends signals to the extruder and the tractor respectively, the extruder keeps the first extrusion speed to extrude the raw materials prepared in the pretreatment stage, an internal air outlet in the extruder is opened, the internal air extrudes the side wall of the preliminarily formed pipe body to the forming module, so that the pipe wall forms ripples, and the tractor keeps the first traction speed to pull out the formed pipe body at a constant speed;

second stage, processing the pipe body to form a solid wall

The first limiting device is activated, the second limiting device is closed, the first limiting device sends a signal to the single chip microcomputer controller, the single chip microcomputer controller respectively sends a signal to the extruder and the tractor, the extruder is accelerated to a second extrusion speed and/or the tractor is decelerated to a second traction speed, namely, the extruder is accelerated, the tractor is decelerated and the tractor is decelerated simultaneously, namely, the three conditions (only the extruder is accelerated, only the tractor is decelerated and the extruder is decelerated simultaneously) are all available, the aim is to ensure that the pipe wall melting material of the pipe body part positioned in the forming module is accumulated, even if the thickness of the pipe wall is increased, simultaneously, an inner air outlet on the extruder is closed, the pipe wall loses the extrusion force towards the forming module, the thickness of the pipe wall is further increased, and because the pipe wall is not extruded towards the forming module, no ripple can be formed on the pipe wall, namely, a solid-wall pipe is formed, and simultaneously, the first limiting device can also be activated through a time relay, after the length of the solid wall pipe reaches, the speed is automatically recovered and the internal gas is opened by time control, and the speed is automatically recovered and the internal gas is opened after the required length of the solid wall pipe is reached by a distance controller (meter length);

the first stage and the second stage are alternately performed.

Post-treatment stage

Sawing off the solid-wall pipe body, heating the end part of one side of the sawn surface to expand the socket, prefabricating a sealing ring on the inner side wall of the socket, and leaving the end part of the other side of the sawn surface untreated to obtain the socket.

Specifically, the sealing ring is sleeved on a mold core of a flaring mold, the end part of one side of the sawn surface is heated and then sleeved on the flaring mold, and the bell mouth of the prefabricated sealing ring is obtained after cooling.

The forming method can also be applied to the production of double-wall corrugated pipes which take polyethylene, polypropylene, polybutylene, heat-resistant polyethylene, ABS, chlorinated polyvinyl chloride, polystyrene and modified materials thereof as raw materials.

Compared with the common corrugated pipe on the market, the pressure-bearing prefabricated sealing ring double-wall corrugated pipe manufactured by the scheme has the advantages that the interface pressure-bearing capacity of the pressure-bearing prefabricated sealing ring double-wall corrugated pipe reaches 1.2-2.0MPa, the pressure-bearing capacity of the interface of the common corrugated pipe on the market is only 0.1-0.3MPa, for the joint installation time of OD800mm pipes, the pressure-bearing prefabricated sealing ring double-wall corrugated pipe manufactured by the scheme only needs 2min when being installed, while the common corrugated pipe on the market needs 6min when being installed, for the joint installation time of OD1000mm pipes, the pressure-bearing prefabricated sealing ring double-wall corrugated pipe manufactured by the scheme only needs 4min when being installed, and the common corrugated pipe on the market needs 10min when being installed, for the maximum deflection angle no-leakage test, the pressure-bearing prefabricated sealing ring double-wall corrugated pipe manufactured by the scheme has the temperature of 35 degrees or more, and the common corrugated pipe on the market has the temperature of about 15 degrees.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A forming system of a pressure-bearing prefabricated sealing ring double-wall corrugated pipe is characterized by comprising a pipe body, wherein one end of the pipe body is provided with a socket, the other end of the pipe body is provided with a socket, the wall thickness of the socket is greater than that of the pipe body, and a sealing ring is arranged on the inner side wall of the socket;

wherein the wall thickness of the socket is greater than the wall thickness of the tube body;

the pipe body comprises an outer layer and an inner layer, the outer layer is corrugated, a plurality of cavities are arranged between the outer layer and the inner layer, and the cross sections of the cavities are rectangular;

the forming system comprises an extruder, a forming module, a tractor and a single chip microcomputer controller, wherein the forming module is provided with a first limiting device and a second limiting device respectively, a signal output end of the first limiting device is connected with a first signal input end of the single chip microcomputer controller, a signal output end of the second limiting device is connected with a second signal input end of the single chip microcomputer controller, a first signal output end of the single chip microcomputer controller is connected with a signal input end of the extruder, and a second signal output end of the single chip microcomputer controller is connected with a signal input end of the tractor.

2. The system for forming a pressure-bearing prefabricated sealing ring double-wall corrugated pipe according to claim 1, wherein an annular groove is formed in an inner side wall of the bellmouth, and the sealing ring is embedded in the annular groove.

3. The system for forming a pressure-bearing prefabricated sealing ring double-wall corrugated pipe as claimed in claim 1, wherein the sealing ring comprises an annular steel skeleton and a rubber layer coated outside the steel skeleton.