CN113513648A - Large-caliber steel wire mesh framework plastic composite pipe connecting structure and implementation method thereof - Google Patents
Large-caliber steel wire mesh framework plastic composite pipe connecting structure and implementation method thereof Download PDFInfo
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- CN113513648A CN113513648A CN202110749682.6A CN202110749682A CN113513648A CN 113513648 A CN113513648 A CN 113513648A CN 202110749682 A CN202110749682 A CN 202110749682A CN 113513648 A CN113513648 A CN 113513648A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/125—Rigid pipes of plastics with or without reinforcement electrically conducting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention belongs to the field of pipe processing, and provides a large-caliber steel wire mesh framework plastic composite pipe connecting structure and an implementation method thereof, wherein the large-caliber steel wire mesh framework plastic composite pipe connecting structure comprises the following steps: the pipe body and the flange annular structural component are assembled in a socket joint mode, and hot-melt connection structures are arranged among different flange annular structural components; the outer cylindrical surface of the flange ring-shaped structural part is provided with different outer diameter sizes and transition connection areas, the inner cylindrical surface of the flange ring-shaped structural part is embedded with conductive copper wires, two copper wiring terminals are arranged close to the socket end, and the other side of the inner cylindrical surface of the flange ring is provided with a limiting check ring. The invention provides a connecting structure for a large-caliber steel wire mesh framework plastic composite pipeline, equipment and a method for processing the connecting structure, which are different from the prior art; the connecting structure can not only realize the intrinsic safety problem of the connector, but also improve the construction efficiency.
Description
Technical Field
The invention belongs to the field of pipe processing, and particularly relates to a novel connection mode and an implementation method on a plastic pressure pipeline, and particularly realizes hot-melt butt welding connection which is approximately consistent with a solid-wall pipeline (polyethylene, polypropylene and the like) in a product of a large-caliber steel wire mesh framework plastic composite pipeline of dn630 or above.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The steel wire mesh skeleton plastic composite pipeline has a five-layer composite structure, and comprises an outer plastic layer, a hot melt adhesive layer, a wound steel wire mesh reinforcing layer, a hot melt adhesive layer and an inner plastic layer from outside to inside, so that the steel wire mesh skeleton plastic composite pipeline has the advantages of high strength, light weight, low manufacturing cost, no corrosion and the like, and is widely applied to the fields of municipal long-distance water supply engineering, mountain high-pressure water supply and drainage, industrial park fire protection, mine water supply and drainage and the like;
in the existing industry, the connection modes of the steel wire mesh framework plastic composite pipes mainly comprise electric melting pipe connection, mechanical buckling and pressing double-seal connection, buckling and pressing clamp connection, flanging flange connection and the like; however, in the dn630 or above large-caliber steel wire mesh framework plastic composite pipe, only electric melting pipe fitting connection exists at present, other connections such as mechanical buckling double seal, buckling clamp, flanging flange and the like, and due to the reasons of large non-roundness of the steel wire pipe, low ring rigidity and the like, the connection mode is single and the application is limited, and no breakthrough application exists in the whole industry; secondly, after the large-caliber steel wire mesh framework plastic composite pipeline is produced and is off-line, the end composite layer is subjected to hot melting plastic packaging by virtue of a sealing ring accessory so as to ensure that a conveying medium is blocked and meet the requirement on corrosion resistance of a steel wire layer; however, in the sealing mode, in the processes of batch production and actual installation and application, the pipeline is often deformed due to internal pressure, so that the composite layer steel wire is axially moved, and further, the top of the sealing ring fitting at the end part of the pipe body is cracked, so that the quality problems of end sealing failure, composite layer water seepage, pipeline leakage and the like are caused; meanwhile, due to the problems of low rigidity, large non-roundness and the like of the pipe ring, the fit clearance between the pipe and the pipe fitting cannot be ensured, the welding strength and the safety of the pipeline operation are limited by the skills of operators, and the requirements on the skills of the operators are high; therefore, in some occasions with higher operation pressure and higher safety requirements, the plastic pipeline is limited in large-caliber popularization and application due to the disadvantage of the connection method.
Therefore, a connection mode which can ensure the safe and reliable connection and can realize the rapid construction is lacked in the large-caliber steel wire mesh framework plastic composite pipeline for a long time.
Disclosure of Invention
In order to overcome the problems, the invention provides a connecting structure and processing equipment and a method thereof, which are different from the prior art and are used for large-caliber steel wire mesh framework plastic composite pipelines; the connecting structure can not only realize the intrinsic safety problem of the connector, but also improve the construction efficiency in a hot melting butt welding connection mode;
in order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a large-caliber steel wire mesh framework plastic composite pipe connecting structure in a first aspect, which comprises: the pipe body and the flange annular structural component are assembled in a socket joint mode, and hot-melt connection structures are arranged among different flange annular structural components; the outer cylindrical surface of the flange ring-shaped structural part is provided with different outer diameter sizes and transition connection areas, the inner cylindrical surface of the flange ring-shaped structural part is embedded with conductive copper wires, two copper wiring terminals are arranged close to the socket end, and the other side of the inner cylindrical surface of the flange ring is provided with a limiting check ring.
The second aspect of the invention provides a method for realizing a large-caliber steel wire mesh framework plastic composite pipe connecting structure, which comprises the following steps:
the pipe body and the flange annular structural part are subjected to socket assembly: clamping and positioning the pipe, heating the pipe end, and inserting the pipe into the flange annular structural part after the end of the pipe body is preheated to form sealing of a composite layer at the end of the pipe; maintaining the pressure of the hydraulic pump, and maintaining the pressure and cooling for a certain time;
the hot melt of different flange ring structural members is connected between the body: the plastic on the flange annular structural member, which has a sealing effect on the pipe, is gradually converted into molten flanging flash, after the specified heat absorption time and the molten flanging height are reached, the heating device is removed, and two pipes to be connected are quickly subjected to hot melting butt welding together, so that the pipe body and the body, and the flange annular structural member and the structural member are welded simultaneously.
In a third aspect of the present invention, there is provided a processing apparatus for a large-caliber steel wire mesh framework plastic composite pipe connection structure, the processing apparatus comprising: the device comprises a frame, a clamping and positioning device, a heating device, a power source device and a control device; the machine frame is provided with at least two slide rails, a clamping and positioning device is slidably arranged on the slide rails, the clamping and positioning device is sequentially connected with a power source device and a control device, and a heating device is further arranged on the machine frame.
The invention has the beneficial effects that:
compared with the existing connection mode in the industry, the invention has the following beneficial effects:
(1) the process of the connection mode hot melting welding is that the pipe body and the body, and the flange ring structural member and the structural member are welded into a whole, so that the mode that an additional sealing ring is commonly used in the prior industry to seal a composite layer is changed; the welding strength of the same material and the body is higher, the reliability is better, the common problems of the existing industries of the products such as the large-caliber steel wire composite pipe can be thoroughly solved, namely: after the seal is invalid, the composite layer is seeped, and the problems of pipeline leakage and safe operation are caused;
(2) the connecting structure enables the large-diameter steel wire pipe to have the condition of hot melting butt welding connection in the construction site process, and on the steel wire composite pipe, compared with the electric melting connection adopted in the current market, the connecting structure has the advantages of higher installation efficiency, simplicity and convenience in operation and easiness in control and the like;
(3) the flange ring structure is specially designed, namely: the whole thickness of the pressure bearing area of the connecting piece is larger, and the thickness of the non-pressure bearing area is thinner, so that the consumption of raw materials is reduced, and the cost is reduced;
(4) the application has the advantages of simple structure, strong practicability and easy large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a flange ring structure according to the present invention;
FIG. 2 is an assembly drawing of a flange ring-shaped structural member and a steel wire mesh skeleton plastic composite pipe of the invention;
FIG. 3 is a structural diagram of a steel wire mesh framework plastic composite pipe after welding;
FIG. 4 is a connection structure diagram of a plastic composite pipe with a steel wire mesh framework in the industry;
FIG. 5 is a structure of the round clamp in the steel wire mesh framework plastic composite pipe of the invention;
FIG. 6 is a view of the structure of the clamping and positioning device of the apparatus of the present invention;
FIG. 7 is a right side view of the overall construction of the apparatus of the present invention;
FIG. 8 is a top view of the overall structure of the apparatus of the present invention;
the device comprises a conductive copper wire 1, a limiting retainer ring 3, a flange annular structural member 4, a steel wire mesh framework plastic composite pipe 5, a hot-melting flanging 6, a sealing ring 7, an electric melting sleeve 8, an inner rounding fixture 9, a turn buckle 10, an equipment rack 11, a clamping device 12, a heating device 13, a protective shaft sleeve 14, a power cylinder 15, a cylindrical slide rail 16, a clamping ring 17, a positioning step 18, a pre-tightening bolt hole 19, a fixture main body 20 and a clamping stud.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The hot-melt connecting structure of the large-diameter steel wire mesh framework plastic composite pipe is characterized in that a flange ring-shaped structural member which is prefabricated in advance and finished is clamped, positioned, heated at the pipe end and the like by special processing equipment in a company, and finally the end of a steel wire pipe is inserted into the inner circular surface of the flange ring-shaped structural member in a socket mode and simultaneously the hot-melt sealing protection effect on a composite layer at the end of the steel wire pipe is achieved, so that the connecting structure is formed; when the flange ring-shaped structural member is installed on site, the end face of the steel wire pipe with the welded flange ring-shaped structural member is cleaned and milled, after the heating action, heat absorption and pressure of the heating device are maintained for a certain time, the plastic which has the sealing action on the steel wire composite layer on the original flange ring-shaped structural member is gradually converted into molten flanging flash, at the moment, the heating device can continuously transfer heat and act on the end part of the steel wire composite pipe, after the specified heat absorption time and the molten flanging height are reached, the heating device is removed and two pipes to be connected are rapidly subjected to hot melting and butt welding together, so that the effect that the pipes are welded between the pipe body and the flange ring-shaped structural member and the structural member at the same time is achieved; the key design of the connection mode is that the flange annular structural part has a basic sealing and corrosion preventing function on a pipe end composite layer before the pipeline is installed, and the effects of welding, synchronously bearing axial tension and synchronously bearing radial force between the pipe body and between the flange annular structural part and the structural part can be realized after the pipeline is installed; see the example drawings for details.
The special processing equipment is a simple tool machine which consists of a rack, a clamping and positioning device, a heating device, a power source device, a control device and the like according to the process requirements, and has the functions of heating the pipe end of the steel wire mesh framework plastic composite pipe, clamping a pipe body and a flange ring structure, positioning, assembling and the like;
furthermore, the frame is a foundation of the equipment, is formed by welding and processing steel profiles such as square pipes, angle steels and the like, and plays a role in supporting, clamping and positioning devices, heating devices and power source devices; the frame is a rectangular structure which is relatively regular, two cylindrical slide rails are arranged along the length direction of the frame, and under the action of a power source, the clamping and positioning device can telescopically move along the cylindrical slide rails so as to drive the pipe body or the flange ring structural member to move;
furthermore, the clamping and positioning devices are distributed along the direction of a cylindrical slide rail of the equipment, and three groups are arranged, wherein each group is formed by combining an upper sheet and a lower sheet and has a semi-circular structure with a certain width; the inner circular surface of the clamp has the circular arc curvature which is consistent with the outer circular surface of the pipe and the outer circular surface of the flange ring structural member, the upper clamp and the lower clamp are pre-tightened through the stud, the pipe body and the flange ring structural member are firmly clamped and have consistent coaxiality, and the pipe can be conveniently and smoothly inserted into the inner circular surface of the flange ring structural member; the hydraulic oil cylinders are arranged between two adjacent groups of the clamping devices, and when the pipe or flange ring structure is clamped, one of the pipe or flange ring structures can be driven to realize reciprocating telescopic movement; when pipes of different types are clamped, the clamping can be realized by overlapping arc-shaped clamps of different specifications, and the clamps are fixed by bolts; the intensive production of various types of pipes in the same equipment is realized.
Furthermore, the heating device is fixed on a cylindrical slide rail of the equipment rack, and a copper shaft sleeve is in transition fit between the heating device and the cylindrical slide rail so as to ensure relative protection of the cylindrical slide rail and avoid long-term abrasion; are relatively fixed in position
The outer cylindrical surface of the flange annular structural part is provided with different outer diameter sizes and transition connection areas according to the consideration of radial force, axial force, cost optimization and the like borne by the flange annular structural part arranged at the pipe end; the size of the inner circular surface is slightly larger than the average outer circular surface size of the pipe by 1-2mm so as to ensure that the steel wire composite pipe can be smoothly inserted into the inner circular surface of the flange ring structural member; the inner circular surface of the flange ring structural member is embedded with a conductive copper wire with a specific pitch, and two copper connecting terminals are arranged near the female end and can be tightly connected with the copper wire; the flange ring inner circle opposite side sets up spacing retaining ring, and retaining ring thickness is not more than 10mm, mainly has two purposes: firstly, the end face of the steel wire pipe is heated, and the limiting retainer ring is bonded with the end part of the steel wire pipe, so that the steel wire composite layer is sealed and prevented from being corroded; secondly, the relative consistency of the position of each time of inserting and inserting the pipe in the continuous production process is ensured;
the processing of the pipe body and the flange annular structural part comprises the following procedures
I cleaning procedure of the outer circular surface of the pipe: placing the steel wire composite pipe body in special equipment and firmly clamping the steel wire composite pipe body by a clamp, wherein the pipe end extends out of the end face of the clamp by 200-300 mm, and cleaning an oxide layer and dirt on the outer circular surface of the pipe end by using a rotary scraper;
II, pipe size rounding process: placing a steel inner rounding fixture into the inner wall of the pipe, expanding the fixture outwards under the action of a turnbuckle thread pair, and gradually rounding the outer circle of the end part of the pipe;
III, heating the end part of the pipe: the heating plate is used for heating the end part of the steel wire composite pipe, and meanwhile, the hydraulic pump always keeps acting force on the clamping and positioning device, so that the end part is always tightly attached to the heating plate and absorbs heat from the heating plate;
IV, socket assembling of the pipe body and the flange annular structural part: after the end part of the pipe body is heated for a certain time, quickly separating the heating plate from the end part of the pipe, and quickly inserting the pipe body into the flange annular structural part by virtue of the thrust action of a hydraulic cylinder to form sealing of a composite layer at the end part of the pipe; maintaining the pressure of the hydraulic pump, and maintaining the pressure and cooling for a certain time;
v, cleaning a welding ring at the end of the pipe: removing the flanging flash on the inner wall by using a cyclone milling cutter to keep the appearance attractive;
the present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
in order to solve the problems of sealing failure, potential safety hazard and the like of a large-diameter steel wire mesh framework plastic composite pipe in application, realize the diversity of the connection modes of the pipes and solve the reliability in the batch production process, the invention provides a novel connection structure and equipment for processing the same;
the novel connecting structure is hot melt butt welding connection of the large-caliber steel wire mesh framework plastic composite pipe, and a key part of the connecting structure is a flange annular structural part shown in figure 1; a flange annular structural member is produced by injection molding equipment to obtain a blank piece, the blank piece is subjected to natural failure treatment and turning to form a structure shown in a figure 1, a conductive copper wire 1 is embedded in the inner wall of the structural member, a limiting retainer ring 2 is machined, and the whole thickness of the limiting retainer ring is not more than 10mm, so that after the processes of field installation, milling, heating, heat absorption and the like are completed, the thickness of the part is in a molten state to form a raised flanging 5, and the heat of a heating device 12 can be smoothly transferred to the end part of a steel wire pipe body; the inner diameter of the limiting retainer ring 2 of the flange annular structural part is close to the inner circular surface of the steel wire mesh framework plastic composite pipe, so that the flatness of the inner circular surface is ensured after the pipe body 4 is inserted into the flange annular structural part 3;
secondly, in the processing of the flange ring structural member and the interior of the pipe body, special processing equipment is essential important equipment and is a key for ensuring the welding quality and the production efficiency of the connector; the special processing equipment comprises a frame 10, a clamping device 11, a heating device 12, a power cylinder 14, a cylindrical slide rail 15, a control device and the like; the clamping device 11 comprises a clamp body 19, a clamping ring 16, a protective shaft sleeve 13, a clamping stud 20 and the like; the clamp main body 19 is composed of an upper part and a lower part, wherein two ends of the clamp main body of the lower part are fixed on the cylindrical slide rail 15, one end of the clamp body of the upper part is fixed on the cylindrical slide rail and can rotate by taking the cylindrical slide rail 15 as a fulcrum, and the other end can clamp or loosen the pipe body or the connecting piece through the clamping stud 20; the clamping rings 16 are in a semicircular structure and are distributed in an upper and a lower two-piece mode, are fixed on the clamp main body 19 through the positioning steps 17 and the pre-tightening bolt holes 18, and can meet the clamping requirements on the steel wire mesh framework plastic composite pipe bodies 4 and the flange annular structural members 3 with different pipe diameters by replacing the clamping rings with different specifications;
after the pipe body is produced and off-line, the pipe is hoisted to equipment, and the steel wire mesh framework plastic composite pipe body 4 and the flange annular structural member 3 are reliably clamped through the clamping device 11; because the pipe is longer in fixed length, a single clamping device on one side of the heating device 12 is used for clamping a flange annular structural member, and two clamping devices on the other side are used for clamping a steel wire mesh framework plastic composite pipe together; in the clamping process, the length of the end part of the pipe extending out of the end face of the clamping device 11 needs to be ensured to be 200-300 mm, at the moment, the steel inner rounding clamp 8 is placed on the inner circle face of the end part of the pipe, the clamp is expanded outwards under the action of the thread pair of the turn buckle 9, and the outer circle size of the end part of the pipe is rounded gradually; then cleaning the oxide layer and dirt on the outer circular surface of the part by using a rotary scraper; meanwhile, the flange annular structural member and the pipe body can move within a certain range under the action of the power oil cylinder 14; because each clamping device is fixed on the cylindrical slide rail 15, the requirement of higher coaxiality of the pipe body and the structural part can be met;
then, the heating device 12 rotates along the cylindrical slide rail 15 and moves into the equipment rack 10 to prepare for heating, absorbing heat and other operations on the end part of the steel wire mesh framework plastic composite pipe; the temperature of the heating device 12 is generally set between 220 ℃ and 235 ℃, and the action pressure of the power cylinder 14 is set according to the wall thickness of the pipe body, so that the acting force between the end part of the pipe body and the heating device 12 is always ensured, and the pipe end is fully heated and absorbs heat to form a melting flanging; when the flanging height and the heating time reach the set process standard, the heating device 12 is rotated and moved out, the flange annular structural member 3 and the steel wire mesh framework plastic composite pipe are quickly connected in a socket manner by virtue of the power cylinder 14, the end part of the steel wire pipe is inserted into the inner circular surface of the flange annular structural member in a socket manner, and the hot melting and bonding effect on the composite layer at the end part of the steel wire pipe is achieved; after the above operations, the connection effect shown in fig. 2 is achieved; and finally, an electric fusion welding machine is used for connecting the conductive copper wire 1, the copper wire is continuously electrified to generate heat, and finally the steel wire mesh framework plastic composite pipe and the flange annular structural member are fused and welded together by the interface material in the matching area after socket joint, so that higher axial tensile strength is achieved.
During field installation, only the end face of a steel wire pipe of a flange annular structural member of the structure shown in fig. 2 needs to be cleaned and milled, after the heating action, heat absorption and pressure of the heating device 12 are maintained for a certain time, the limiting retainer ring 2 which has a sealing effect on a steel wire composite layer on the original flange annular structural member is gradually converted into molten flanging flash, at the moment, the heating device 12 can continuously transfer and act heat to the end part of the steel wire composite pipe, after the specified heat absorption time and the molten flanging height are reached, the heating device is removed and two pipes to be connected are rapidly subjected to hot melting and butt welding together, so that the effect that the pipes are welded between the body and the flange annular structural member and the structural member at the same time is realized, as shown in fig. 3; in the connection mode, the limiting retainer ring 2 on the flange annular structural member 3 before pipeline installation has a basic sealing function on a pipe end composite layer after being thermally welded with the pipe body, the limiting retainer ring 2 is converted into a molten flanging flash by the heating device 12 in the field installation process, and the effects of welding, synchronously bearing axial tension and synchronously bearing radial force between the pipe body and between the flange annular structural member and the pipe body are ensured after actual welding;
at present, the common electric melting pipe fittings in the industry are connected, as shown in a structure of fig. 4, namely, a sealing ring 6 is used for realizing hot melting welding sealing of a pipe end composite layer, when a pipe body is deformed by internal pressure, a steel wire can axially shift, cracks and cracking phenomena between the sealing ring 6 and the pipe body are easily caused, and a medium permeates along with the gap under pressure, so that water shifting and potential safety hazards in operation are caused; the connecting mode has the greatest advantage that after the steel wire pipe is installed and welded, the steel wire pipe body and the body, and the flange annular structural member and the structural member are welded simultaneously, and the effects of synchronously bearing axial tension and radial force are achieved.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. 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 (10)
1. The utility model provides a compound union coupling structure of heavy-calibre steel wire mesh skeleton plastics which characterized in that includes: the pipe body and the flange annular structural component are assembled in a socket joint mode, and hot-melt connection structures are arranged among different flange annular structural components; the outer cylindrical surface of the flange ring-shaped structural part is provided with different outer diameter sizes and transition connection areas, the inner cylindrical surface of the flange ring-shaped structural part is embedded with conductive copper wires, two copper wiring terminals are arranged close to the socket end, and the other side of the inner cylindrical surface of the flange ring is provided with a limiting check ring.
2. The large-caliber steel wire mesh framework plastic composite pipe connecting structure as claimed in claim 1, wherein the size of the inner circular surface of the flange annular structural member is slightly larger than the size of the average outer circular surface of the pipe by 1-2 mm.
3. The large-caliber steel wire mesh framework plastic composite pipe connecting structure as recited in claim 1, wherein the integral thickness of the limiting retainer ring is not more than 10 mm.
4. A method for realizing a large-caliber steel wire mesh framework plastic composite pipe connecting structure is characterized by comprising the following steps:
the pipe body and the flange annular structural part are subjected to socket assembly: clamping and positioning the pipe, heating the pipe end, and inserting the pipe into the flange annular structural part after the end of the pipe body is preheated to form sealing of a composite layer at the end of the pipe; maintaining the pressure of the hydraulic pump, and maintaining the pressure and cooling for a certain time;
the hot melt of different flange ring structural members is connected between the body: the plastic on the flange annular structural member, which has a sealing effect on the pipe, is gradually converted into molten flanging flash, after the specified heat absorption time and the molten flanging height are reached, the heating device is removed, and two pipes to be connected are quickly subjected to hot melting butt welding together, so that the pipe body and the body, and the flange annular structural member and the structural member are welded simultaneously.
5. The method for realizing the large-caliber steel wire mesh framework plastic composite pipe connecting structure according to claim 4, wherein the method further comprises the following steps: cleaning the outer circle surface of the pipe and rounding the size of the pipe.
6. A method for realizing a large-caliber steel wire mesh framework plastic composite pipe connecting structure as claimed in claim 4, wherein in the process of heating the pipe, the acting force on the clamping and positioning device is always kept, so that the end part of the pipe is always tightly attached to the heating device.
7. The utility model provides a processing equipment of compound union coupling structure of heavy-calibre steel wire mesh skeleton plastics, its characterized in that, processing equipment includes: the device comprises a frame, a clamping and positioning device, a heating device, a power source device and a control device; the machine frame is provided with at least two slide rails, a clamping and positioning device is slidably arranged on the slide rails, the clamping and positioning device is sequentially connected with a power source device and a control device, and a heating device is further arranged on the machine frame.
8. The processing equipment for the large-caliber steel wire mesh framework plastic composite pipe connecting structure according to claim 7, wherein a plurality of groups of clamping and positioning devices are arranged along the direction of the slide rail;
or a hydraulic oil cylinder is arranged between the two adjacent groups of clamping and positioning devices.
9. The processing equipment for the large-caliber steel wire mesh framework plastic composite pipe connecting structure according to claim 7, wherein the clamping and positioning device is formed by combining an upper clamp and a lower clamp, and the clamps are of semi-circular structures;
preferably, the clamping and positioning device is superposed with arc-shaped clamps with different specifications.
10. The processing equipment for the large-caliber steel wire mesh framework plastic composite pipe connecting structure as claimed in claim 7, wherein the heating device is fixed on a slide rail of the rack, and a copper shaft sleeve is in transition fit between the heating device and the slide rail.
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| CN116255519A (en) * | 2023-05-11 | 2023-06-13 | 康泰塑胶科技集团有限公司 | Composite pipe joint and production equipment and production method thereof |
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| CN113513648B (en) | 2023-05-30 |
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