CN116255519A - Composite pipe joint and production equipment and production method thereof - Google Patents
Composite pipe joint and production equipment and production method thereof Download PDFInfo
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- CN116255519A CN116255519A CN202310525938.4A CN202310525938A CN116255519A CN 116255519 A CN116255519 A CN 116255519A CN 202310525938 A CN202310525938 A CN 202310525938A CN 116255519 A CN116255519 A CN 116255519A
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- 239000002131 composite material Substances 0.000 title claims abstract description 203
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 66
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000001125 extrusion Methods 0.000 claims description 28
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 9
- 238000004898 kneading Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 7
- 230000005855 radiation Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/566—Winding and joining, e.g. winding spirally for making tubular articles followed by compression
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
- B29C53/845—Heating or cooling especially adapted for winding and joining
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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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/14—Flanged joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/24—Pipe joints or couplings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a composite pipe joint and production equipment and a production method thereof, and relates to the field of pipe production. The pipe production method comprises the steps of placing the pipe on a roller mechanism, driving the roller mechanism to rotate by a transmission system, extruding the strip-shaped thermoplastic material from an extruding device to the axial end face of the pipe, and heating the strip-shaped thermoplastic material by a heating device until the strip-shaped thermoplastic material is melt and laminated on the axial end face of the pipe. The composite pipe joint is prefabricated on the axial end face of the composite pipe, has hot-melt weldability, can be directly connected in a hot-melt mode without using a pipe fitting when the composite pipe is connected, and is particularly suitable for connecting large-caliber pipes.
Description
Technical Field
The invention relates to the technical field of pipe production, in particular to a composite pipe joint, and production equipment and a production method thereof.
Background
The existing steel wire composite pipe connection mode mainly adopts modes of electric melting pipe fitting connection, steel buckling piece flange connection and the like.
The pipe fitting is mainly made of plastic materials, but the cost of the large-caliber electric melting pipe fitting is high.
The steel buckling piece is used for pressing the pipe port, then the buckling piece is sleeved with the flange plate, the flange plate is connected through bolts, the sealing performance of the flange plate is easy to weaken and leakage is generated under the long-term high-pressure operation and the long-term stress relaxation effect of plastic materials, the buckling piece is in direct contact with liquid conveyed in the pipe, the corrosion is easy, and the service life is short.
Disclosure of Invention
The invention mainly aims to provide a composite pipe joint, and production equipment and production method thereof, so that the composite pipe can be connected without using a pipe fitting, and the problems that the traditional steel wire composite pipe in the prior art needs to be connected by using an electric melting pipe fitting, is high in cost, and is easy to corrode and easily fail in sealing by using a steel buckling piece flange connection are solved.
The technical scheme adopted by the invention is as follows:
first aspect:
the embodiment of the invention provides a composite pipe joint, which is formed by stacking a plurality of layers of molten strip-shaped thermoplastic materials.
Optionally, the composite pipe joint is formed on the axial end face of the composite pipe by hot melting, and the composite pipe sequentially comprises a plastic outer layer, a steel wire reinforcing layer and a plastic inner layer from outside to inside.
Optionally, the pressure level range of the composite pipe and the composite pipe joint is 0MPa-5MPa.
Optionally, the inner diameter of the composite pipe joint is equal to the inner diameter of the composite pipe, the outer diameter of the composite pipe joint is larger than the outer diameter of the composite pipe, and the composite pipe joint is higher than the axial end face of the composite pipe in the axial direction.
Second aspect:
the embodiment of the invention provides production equipment of a composite pipe joint, which comprises the following components:
the roller mechanism is used for supporting the composite pipe;
the lining mould is inserted into the axial end face of the composite pipe;
the transmission system is in transmission connection with the roller mechanism and is used for driving the roller mechanism to rotate;
the extrusion device is used for extruding the strip-shaped thermoplastic material to the axial end face of the composite pipe and the periphery of the axial end face of the composite pipe;
the heating device is used for heating the axial end face of the composite pipe and the strip-shaped thermoplastic material;
and the compressing device is used for compressing the strip-shaped thermoplastic material and the composite pipe.
Optionally, the roller mechanism includes axostylus axostyle and roller bearing, transmission system includes action wheel, rotary drive spare and follow driving wheel, the action wheel set up in rotary drive spare's output, follow driving wheel with the roller bearing coaxial set up in the axostylus axostyle, the action wheel with follow driving wheel transmission connection.
Optionally, the compressing device comprises a pressing wheel arranged between the discharging end of the extruding device and the outer side of the axial end face of the composite pipe.
Third aspect:
the embodiment of the invention provides a production method of a composite pipe joint, which is based on the production equipment of the composite pipe joint, and comprises the following steps:
s1, placing a composite pipe in the roller mechanism;
s2, inserting the lining mould into the composite pipe under the action of axial hydraulic pressure;
s3, driving the roller mechanism and the composite pipe to rotate along a preset direction by using the transmission system;
s4, uniformly extruding the strip-shaped thermoplastic material by using an extrusion device, and welding the strip-shaped thermoplastic material on the axial end face of the composite pipe or the previous layer of strip-shaped thermoplastic material;
s5, the heating device heats the axial end face of the composite pipe and the strip-shaped thermoplastic material, so that the strip-shaped thermoplastic material is stacked and welded layer by layer on the axial end face of the composite pipe, and the composite pipe with the hot melting characteristic composite pipe joint is formed.
Optionally, the heating temperature of the heating device ranges from 60 ℃ to 250 ℃.
Optionally, the extrusion width of the extrusion device is in the range of 10mm-800mm, and the temperature of the extruded ribbon-shaped thermoplastic material is more than or equal to 60 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the composite pipe joint provided by the embodiment of the invention, the strip-shaped thermoplastic material is extruded to the axial end face of the composite pipe by utilizing the extrusion device at the axial end face of the composite pipe, and the strip-shaped thermoplastic material is rotationally stacked round by round around the composite pipe to form the composite pipe joint with a layered structure, so that the formed composite pipe can be directly subjected to hot melting butt joint, and the electric melting pipe fitting connection or the metal buckling flange connection is abandoned. The composite pipe joint is made of the ribbon thermoplastic material and is particularly suitable for connecting large-caliber pipes, the composite pipe joint is welded on the axial end face of the composite pipe and integrally formed with the composite pipe, the tightness in the use process can be effectively ensured, the ribbon thermoplastic material is not easy to corrode, and the service life of the composite pipe joint can be effectively prolonged.
In a second aspect, the production equipment of the composite pipe joint provided by the embodiment of the invention has the advantages that the whole equipment is simple in structure and strong in operability, the composite pipe on the roller mechanism rotates around the axis of the equipment by utilizing the transmission system, the strip-shaped thermoplastic material is extruded to the axial end face of the composite pipe by the extrusion mechanism, and the strip-shaped thermoplastic material heated by the heating device is stacked round by round on the axial end face and the surface of the composite pipe under the combined action of the rotation of the composite pipe and the pressing device, so that the composite pipe joint is formed by conveniently carrying out hot melting butt joint on two composite pipes.
In a second aspect, the embodiment of the invention provides a method for producing a joint for a composite pipe, wherein the composite pipe is placed in a rotating roller mechanism; inserting the lining mould into the axial end face of the composite pipe; the extrusion device extrudes the strip-shaped thermoplastic material to the area between the inner lining mould and the axial end face and the surface of the composite pipe, and the heating device heats the axial end face of the composite pipe and the strip-shaped thermoplastic material under the rotation of the composite pipe body, so that the strip-shaped thermoplastic material is stacked layer by layer on the axial end face of the composite pipe to form the composite pipe with the hot melt joint.
Drawings
Fig. 1 is a schematic structural diagram of a production device of a composite pipe joint according to an embodiment of the present invention under a view angle;
FIG. 2 is a schematic illustration of the connection of a composite tubing to a lining mold;
FIG. 3 is a schematic view of the structure of the composite pipe and the composite pipe joint at one view angle;
FIG. 4 is a schematic view of the structure of the composite pipe and the composite pipe joint at another view angle;
FIG. 5 is a schematic view of the structure of two composite pipes with composite pipe joints during hot melt butt joint.
The reference numerals in the drawings indicate:
the plastic composite pipe comprises a 1-plastic outer layer, a 2-steel wire reinforcing layer, a 3-plastic inner layer, a 4-roller mechanism, a 5-rack, a 6-extrusion device, a 7-heating device, an 8-ribbon thermoplastic material, a 9-pinch roller, a 10-transmission system, an 11-lining mold, a 12-composite pipe joint and an axial end face of a 13-composite pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 3 and 4, the invention further provides a composite pipe joint, the composite pipe joint 12 is formed on an axial end face 13 of a composite pipe by hot melting, the composite pipe joint 12 is formed by stacking a plurality of layers of molten ribbon thermoplastic materials 8, the inner diameter of the composite pipe joint 12 is equal to the inner diameter of the composite pipe, the outer diameter of the composite pipe joint 12 is larger than the outer diameter of the composite pipe, the composite pipe joint 12 is higher than the axial end face of the composite pipe in the axial direction, wherein the composite pipe comprises a plastic outer layer 1, a steel wire reinforcing layer 2 and a plastic inner layer 3 from outside to inside in sequence, and the pressure grade range of the composite pipe and the composite pipe joint 12 is 0MPa-5MPa.
In the composite pipe in the embodiment, the PE outer cladding layer and the PE core pipe layer are arranged on the inner layer and the outer layer of the pipe, and the steel wire layer for increasing the strength is clamped between the inner layer and the outer layer, so that the composite pipe is ageing resistant, rust-proof, corrosion-resistant, attractive and elegant, good in glossiness, high in strength and durable. The end part of the composite pipe joint 12 is provided with the composite pipe joint 12 which can be in hot melting butt joint, the composite pipe joint 12 is made of a strip-shaped thermoplastic material, the composite pipe joint 12 is particularly suitable for being connected with a large-caliber pipe, the composite pipe joint 12 is welded on the axial end face 13 of the composite pipe and is integrally formed with the composite pipe, the tightness in the use process can be effectively ensured, the connection is reliable, the installation is convenient, the strip-shaped thermoplastic material is not easy to corrode, and the service life of the composite pipe joint can be effectively prolonged.
Referring to fig. 1 to 2, an embodiment of the present invention provides a production apparatus for a composite pipe joint, including: the composite pipe is placed on the roller mechanism 4, the composite pipe rotates around the central axis of the composite pipe under the rotation of the roller mechanism 4, the inner lining mold 11 is inserted into the axial end face 13 of the composite pipe, the inner lining mold 11 is in a T-shaped column shape, a small diameter section of the inner lining mold 11 is inserted into the composite pipe, the outer diameter of the inner lining mold 11 is attached to the inner wall of the steel wire composite pipe, the heated strip-shaped thermoplastic material is prevented from entering the inside of the pipe, a certain interval is reserved between the inner end face of the large diameter section of the inner lining mold 11 and the axial end face 13 of the composite pipe, the strip-shaped thermoplastic material 8 which is convenient to extrude is attached to the gap between the inner lining mold 11 and the axial end face 13 of the composite pipe and the outer side wall face of the axial end face 13 of the composite pipe, the transmission system 10 is in transmission connection with the roller mechanism 4, and the extrusion device 6 is used for extruding the strip-shaped thermoplastic material 8 to the axial end face 13 of the composite pipe; the heating device 7 is used for heating the strip-shaped thermoplastic material of the outer side wall surface of the axial end surface 13 of the composite pipe and the axial end surface 13 of the composite pipe.
Specifically:
referring to fig. 1, two fixing seats are arranged on the frame 5 at intervals, and the fixing seats are not limited and can be integrally formed with the frame 5, and of course, can also be fixed on the frame 5 by bolts. Each fixing seat is provided with a shaft rod mechanism, each shaft rod mechanism comprises a shaft rod and a rolling shaft, two ends of the shaft rod are rotatably arranged on the fixing seat through bearings, the rolling shafts are arranged on the rolling shafts in an interference fit mode, accordingly, the rolling shafts can rotate along with the shaft rods, two adjacent rolling shafts are spaced from each other, the composite pipe is arranged between the two rolling shafts, and the composite pipe is tangent to the rolling shafts.
In this embodiment, the transmission system 10 includes a driving wheel, a rotary driving member, and a driven wheel, where the driving wheel is disposed at an output end of the rotary driving member, the driven wheel and the roller are coaxially disposed on the shaft, and the driving wheel and the driven wheel are in transmission connection.
As an embodiment, the rotary driving member may be a stepping motor and a servo motor, which has the following advantages compared to the stepping motor:
low frequency characteristics: the stepping motor can generate low-frequency vibration phenomenon when running at low speed, and the running stability of the motor is slightly inferior to that of a servo motor. The alternating current servo motor runs very stably, and vibration phenomenon can not occur even at low speed.
Moment-frequency characteristics: the output torque of the stepping motor can drop along with the rising of the rotating speed, and can drop sharply at a higher rotating speed, and the torque of the stepping motor can be small at a high speed. The alternating current servo motor outputs constant torque, can keep the torque unchanged in the rated rotating speed, and can output rated torque.
Control precision: the control of the stepping motor is open loop control, the phenomenon of step loss or locked rotation is easy to occur when the starting frequency is too high or the load is too high, and the phenomenon of overshoot is easy to occur when the rotating speed is too high during stopping, so that the motor output needs to have sufficient allowance for ensuring the control precision and the problems of rising and falling speed are well processed. The servo motor driving system is closed-loop control, the driver can directly sample feedback signals of the motor encoder, the motor and the inside of the driver form closed-loop control, the step losing condition of the stepping motor cannot occur in the rated moment of the motor, the overshoot condition can be compensated, and the control accuracy can be more reliable.
Therefore, in comparison, the servo motor is selected to be optimal.
Further, in this embodiment, the driving wheel and the driven wheel may adopt a driving mode in which the driving wheel and the driven wheel are connected by belt transmission, and of course, it is easy to understand that the driving wheel and the driven wheel may adopt a driving mode in which the driving wheel and the driven wheel are connected by chain transmission. In comparison, the chain transmission has no elastic sliding and slipping phenomenon, accurate average transmission ratio, reliable work, high efficiency, high transmission power, strong overload capacity, small transmission size under the same working condition, small required tensioning force, small pressure acting on a shaft and capability of working in severe environments such as high temperature, humidity, dust, pollution and the like, so the chain transmission is preferable in the embodiment.
In one embodiment, the pressing device comprises a pressing wheel 9 arranged between the discharging end of the extrusion device 6 and the outer side of the axial end face 13 of the composite pipe, the pressing wheel 9 is located above the strip-shaped thermoplastic material 8, and is in direct contact with the strip-shaped thermoplastic material 8 under the action of pressing force (not less than 10N) to form an extrusion effect, so that the extruded strip-shaped thermoplastic material 8 and the heating part are fully welded together to form a lamination effect, and the compactness of the forming of the composite pipe joint 12 is ensured.
As an embodiment, the extrusion device 6 is a device for continuously molding a material in a flowing state through a die by heating and pressurizing, and in this embodiment, a twin-screw extruder is preferably selected based on the material and the performance of the extrusion device 6, which has the following advantages:
1. the double-screw snack extruder adopts a side feeding technology, so that the integrity of materials is improved, and the yield is greatly improved. The position and shape of the feed inlet also have a great influence on the feed efficiency. Under the same parameters, the feed area increases and the output increases. The rectangular cross section has a higher feed efficiency than the circular cross section at the same inlet area.
2. The double-screw extruder has stronger self-cleaning capability. Because the two thread sleeves are interwoven together, the contact part forms a continuous space curve with uniform gaps. Along with the synchronous rotation of the two, the space curve moves along with the synchronous rotation, so as to form the self-control effect between the screws. Meanwhile, the glue on the surface of the thread is cleaned, so that the characteristic of no residual material is ensured.
3. The kneading blocks may mix the materials internally. The number of kneading blocks is increased in the twin-screw extruder, so that the kneading times can be increased, and the kneading quality can be improved. The increase in the internal pressure of the kneading section increases the kneading resistance, increases the kneading strength, and markedly improves the kneading quality.
4. The double screw extruder has strong adaptability. For high viscosity materials, a shallow slot screw low shear rate process may be used. For materials with high shear rate or high screw speed, the deep-groove screw is more suitable for improving extrusion quality and yield.
The embodiment also provides a method for producing the composite pipe joint by using the production equipment, which comprises the following steps:
s1, placing a composite pipe in the roller mechanism 4;
s2, inserting the lining mould 11 into the composite pipe under the action of axial hydraulic pressure;
s3, driving the roller mechanism 4 and the composite pipe to rotate along a preset direction by using the transmission system 10;
s4, uniformly extruding the strip-shaped thermoplastic material 8 by using an extrusion device, and bonding the strip-shaped thermoplastic material on the axial end face 13 of the composite pipe or the previous layer of strip-shaped thermoplastic material;
s5, the heating device 7 heats the axial end face 13 of the composite pipe and the strip-shaped thermoplastic material 8, so that the strip-shaped thermoplastic material 8 is stacked and welded layer by layer on the axial end face 13 of the composite pipe, and the composite pipe with the hot-melt composite pipe joint 12 is formed.
Specifically:
referring to fig. 1: the composite pipe is stably placed on a roller of a rack 5;
referring to fig. 2: the inner lining mould 11 is inserted into the inner wall of the pipe under the action of hydraulic pressure, the outer diameter of the inner lining mould 11 is attached to the inner wall of the composite pipe, the heated strip-shaped thermoplastic material is prevented from entering the inside of the pipe, the drift diameter is prevented from being influenced, the depth of the inner lining mould 11 inserted into the composite pipe is adjustable, the distance between the inner end face of the large-diameter section of the inner lining mould 11 and the axial end face 13 of the composite pipe is ensured to be adjustable, and the length of the pure plastic part of the joint 12 of the composite pipe is ensured;
referring to fig. 1: the extrusion device extrudes the heated ribbon-shaped thermoplastic material 8, the ribbon-shaped thermoplastic material 8 is preferably ribbon-shaped, the width value of the extruded ribbon-shaped thermoplastic material 8 ranges from 10mm to 800mm, and the temperature of the extruded ribbon-shaped thermoplastic material 8 is more than or equal to 60 ℃.
Referring to fig. 1: the heating device 7 is positioned below the extrusion device and is 10mm-500mm away from the surface of the pipe, and the heating temperature is 60-250 ℃.
Referring to fig. 1: the transmission system 10 is utilized to drive the rolling shaft to rotate so as to enable the composite pipe to rotate according to the set direction, the heating device 7 uniformly heats the surface of the composite pipe and the extruded strip-shaped thermoplastic material 8 on the upper layer, the heating part is enabled to reach a molten state, the temperature is more than or equal to 60 ℃, and the strip-shaped thermoplastic material 8 extruded by the extrusion device is uniformly wound on the axial end face 13 of the composite pipe after the composite pipe rotates.
Referring to fig. 1: the pinch roller 9 is located above the belt-shaped thermoplastic material 8, is in direct contact with the belt-shaped thermoplastic material 8 under the action of a pressing force (not less than 10N) and forms an extrusion action, and ensures that the extruded belt-shaped thermoplastic material 8 and the heating part are sufficiently welded together to form a lamination effect.
Referring to fig. 1: with the rotation of the composite pipe, the ribbon thermoplastic material 8 is repeatedly wound and overlapped to form a multi-layer composite pipe joint 12 at the port of the composite pipe, namely, the novel connecting structure capable of being used as the large-caliber steel wire composite pipe, namely, the composite pipe joint 12 is formed.
The formed composite pipe joint 12 is turned to the desired size and appearance.
In this embodiment, the heating device 7 includes modes such as infrared heating and high-temperature air heating, and by comparison, the common electric heater heats surrounding air after the electric heating element generates heat, so that the hot air rises, and cold air is supplemented from the air inlet to transfer heat to the whole room in a mode of passive convection of air. The temperature rise is quick, but no heat accumulation function exists, and the temperature becomes cold quickly after power failure.
An infrared radiation heater is characterized in that a heating body directly emits far infrared energy waves to heat people and objects in the whole space. The electrothermal infrared radiation heater can be internally provided with a heat-insulating material with high specific heat, stores certain heat, and still releases isothermal heat within a certain time after power failure.
Infrared is one of many invisible rays in the sun, and is found by the uk scientist, hesher, for 1800 years, and is also called infrared heat radiation, and has strong heat effect. The frequency of infrared ray on solar spectrum is lower than that of visible ray, and the wavelength is 1000-0.75 mu m. The infrared ray can be divided into three parts, namely near infrared rays with wavelengths of (3-2.5) - (1-0.75) mu m, middle infrared rays with wavelengths of (40-25) - (3-2.5) mu m and far infrared rays with wavelengths of 1500-25-40 mu m.
The principle of infrared heating is to use the absorption of light by an object. The heat transfer form of infrared rays is radiation heat transfer, and energy is transferred by electromagnetic waves. When far infrared rays are irradiated to a heated object, a part of the rays are reflected back and a part of the rays are transmitted through. When the wavelength of the emitted far infrared rays is consistent with the absorption wavelength of the heated object, the heated object absorbs the far infrared rays, and at the moment, molecules and atoms in the object generate resonance, strong vibration and rotation are generated, and the temperature of the object is increased by the vibration and rotation, so that the purpose of heating is achieved.
Therefore, the present embodiment is more prone to infrared heating, and the heating effect is better.
In summary, in the first aspect, the extrusion device 6 is utilized to extrude the strip-shaped thermoplastic material 8 from the axial end face 13 of the composite pipe to the axial end face 13 of the composite pipe, and the strip-shaped thermoplastic material 8 is rotationally stacked round by round around the composite pipe to form the composite pipe joint 12 with a layered structure, so that the formed composite pipe can be directly subjected to hot melting butt joint (as shown in fig. 5), and the electric melting connection or the metal buckling flange connection is abandoned.
In a second aspect, the production device of the composite pipe joint provided by the embodiment of the invention has a simple structure and strong operability, the composite pipe on the roller mechanism 4 is rotated around the axis by using the transmission system 10, the strip-shaped thermoplastic material 8 is extruded to the axial end face 13 of the composite pipe by the extrusion mechanism, and the strip-shaped thermoplastic material 8 heated by the heating device 7 is stacked on the axial end face 13 of the composite pipe one by one to form the composite pipe joint 12 under the rotation of the composite pipe, so that the two composite pipes are conveniently in hot melting butt joint.
In a third aspect, a method for producing a joint for a composite pipe according to an embodiment of the present invention includes placing a composite pipe in a rotating roller mechanism 4; inserting the lining mould 11 into the axial end face 13 of the composite pipe; the extrusion device 6 extrudes the strip-shaped thermoplastic material 8 to the area between the lining die 11 and the axial end face 13 of the composite pipe, and the heating device 7 heats the axial end face 13 of the composite pipe and the strip-shaped thermoplastic material 8 under the rotation of the composite pipe body, so that the strip-shaped thermoplastic material 8 is stacked layer by layer on the axial end face 13 of the composite pipe to form the composite pipe with the hot melt composite pipe joint 12, and the whole production process has simple steps and easy operation, and can effectively solve the production cost.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A composite pipe joint, characterized in that the composite pipe joint (12) is formed by stacking multiple layers of molten ribbon thermoplastic material (8).
2. The composite pipe joint according to claim 1, wherein the composite pipe joint (12) is formed on an axial end face (13) of a composite pipe by hot melting, and the composite pipe sequentially comprises a plastic outer layer (1), a steel wire reinforcing layer (2) and a plastic inner layer (3) from outside to inside.
3. The composite pipe joint according to claim 2, characterized in that the pressure rating of the composite pipe and the composite pipe joint (12) is in the range of 0MPa-5MPa.
4. The composite pipe joint according to claim 1, characterized in that the inner diameter of the composite pipe joint (12) is equal to the inner diameter of the composite pipe, the outer diameter of the composite pipe joint (12) is larger than the outer diameter of the composite pipe, and the composite pipe joint (12) is axially higher than the axial end face (13) of the composite pipe.
5. A production apparatus for a composite pipe joint, the composite pipe joint being the composite pipe joint according to any one of claims 1 to 4, characterized in that the production apparatus comprises:
the roller mechanism (4) is used for supporting the composite pipe;
the lining mould (11), the said lining mould (11) is inserted into the axial end surface (13) of the said composite tubular product;
the transmission system (10) is in transmission connection with the roller mechanism (4) and is used for driving the roller mechanism (4) to rotate;
an extrusion device (6), wherein the extrusion device (6) is used for extruding a strip-shaped thermoplastic material (8) to the axial end face (13) of the composite pipe and the periphery of the axial end face (13) of the composite pipe;
a heating device (7), wherein the heating device (7) is used for heating the axial end face (13) of the composite pipe and the strip-shaped thermoplastic material (8);
and the pressing device is used for pressing the strip-shaped thermoplastic material (8) and the composite pipe.
6. The apparatus for producing a composite pipe joint according to claim 5, wherein the roller mechanism (4) comprises a shaft and a roller, the transmission system (10) comprises a driving wheel, a rotary driving member and a driven wheel, the driving wheel is disposed at an output end of the rotary driving member, the driven wheel and the roller are coaxially disposed at the shaft, and the driving wheel and the driven wheel are in transmission connection.
7. The production equipment of the composite pipe joint according to claim 5, characterized in that the pressing device comprises a pressing wheel (9) arranged between the discharge end of the extrusion device (6) and the outer side of the axial end face (13) of the composite pipe.
8. A method of producing a composite pipe joint, characterized in that the method is based on the production apparatus of a composite pipe joint according to any one of claims 5 to 7, the method comprising:
s1, placing a composite pipe in the roller mechanism (4);
s2, inserting the lining mould (11) into the composite pipe under the action of axial hydraulic force;
s3, driving the roller mechanism (4) and the composite pipe to rotate along a preset direction by using the transmission system (10);
s4, uniformly extruding the strip-shaped thermoplastic material (8) by using an extrusion device (6), and adhering the strip-shaped thermoplastic material to the butt end surface of the composite pipe or the previous layer of strip-shaped thermoplastic material (8);
s5, the heating device (7) heats the axial end face (13) of the composite pipe and the strip-shaped thermoplastic material (8) so that the strip-shaped thermoplastic material (8) is stacked and welded layer by layer on the axial end face (13) of the composite pipe to form the composite pipe with the hot melting characteristic composite pipe joint (12).
9. Method for producing a composite pipe joint according to claim 8, characterized in that the heating temperature of the heating device (7) is in the range of 60-250 ℃.
10. The method for producing a composite pipe joint according to claim 8, characterized in that the extrusion width of the extrusion device (6) ranges from 10mm to 800mm, and the temperature of the extruded ribbon-shaped thermoplastic material is not less than 60 ℃.
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| CN202310525938.4A CN116255519A (en) | 2023-05-11 | 2023-05-11 | Composite pipe joint and production equipment and production method thereof |
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| CN202310525938.4A CN116255519A (en) | 2023-05-11 | 2023-05-11 | Composite pipe joint and production equipment and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116658705A (en) * | 2023-07-24 | 2023-08-29 | 康泰塑胶科技集团有限公司 | High-pressure composite pipe, composite pipe joint and production process |
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